161 results on '"C K, Chung"'
Search Results
2. Factors associated with fall risk of community-dwelling older people: A decision tree analysis
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Kenneth N K Fong, Raymond C K Chung, Patrick P C Sze, and Carmen K M NG
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Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Objective To examine the predictive attributes for accidental falls in community-dwelling older people in Hong Kong using decision tree analysis. Methods We recruited 1151 participants with an average age of 74.8 years by convenience sampling from a primary healthcare setting to carry out the cross-sectional study over 6 months. The whole dataset was divided into two sets, namely training set and test set, which respectively occupied 70% and 30% of the whole dataset. The training dataset was used first; decision tree analysis was used to identify possible stratifying variables that could help to generate separate decision models. Results The number of fallers was 230 with 20% 1-year prevalence. There were significant differences in gender, use of walking aids, presence of chronic diseases, and co-morbidities including osteoporosis, depression, and previous upper limb fractures, and performance in the Timed Up and Go test and the Functional Reach test among the baselines between the faller and non-faller groups. Three decision tree models for the dependent dichotomous variables (fallers, indoor fallers, and outdoor fallers) were generated, with overall accuracy rates of the models of 77.40%, 89.44% and 85.76%, respectively. Timed Up and Go, Functional Reach, body mass index, high blood pressure, osteoporosis, and number of drugs taken were identified as stratifying variables in the decision tree models for fall screening. Conclusion The use of decision tree analysis for clinical algorithms for accidental falls in community-dwelling older people creates patterns for decision-making in fall screening, which also paves the way for utility-based decision-making using supervised machine learning in fall risk detection.
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- 2023
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3. The relationship between liver function and neurophysiological factors in depressed individuals: a cross-sectional study using an integrated 'East meets West' medicine approach
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Jiajia Ye, Yunying Yu, Raymond C. K. Chung, Xiaowen Lian, Xin Wang, Wai Ming Cheung, and Hector W. H. Tsang
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traditional Chinese medicine (TCM) ,depression ,liver function ,cortisol ,heart rate variability (HRV) ,the hypothalamic–pituitary–adrenal (HPA) axis ,Psychiatry ,RC435-571 - Abstract
Introduction:Depression is a common mental disorder worldwide. The pathology of depression may involve the dysregulation of neurotransmitters and immunity and produce genetic and environmental effects. Traditional Chinese Medicine (TCM) has been practiced for several thousand years and has a different understanding of depression compared to Western medicine. However, this approach has not been widely accepted by scientific communities as TCM mainly focuses on clinical practice.Methods:In this study, we conducted a cross-sectional study among 100 participants in a rehabilitation hospital to analyze the plausible pathways linking TCM-based liver function and depression, which we hypothesized in a prior theoretical review.Results:A significant relationship between adrenocorticotropic hormone and TCM-based liver function was found (r = 0.211, p = 0.041). Cortisol was significantly associated with norepinephrine (r = 0.243, p = 0.015) and adrenocorticotropic hormone (r = 0.302, p
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- 2023
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4. Experimental assessment of the relationship between rainfall intensity and sinkholes caused by damaged sewer pipes
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T.-Y. Kwak, S.-I. Woo, C.-K. Chung, and J. Kim
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Environmental technology. Sanitary engineering ,TD1-1066 ,Geography. Anthropology. Recreation ,Environmental sciences ,GE1-350 ,Geology ,QE1-996.5 - Abstract
In several countries, the rising occurrence of sinkholes has led to severe social and economic damage. Based on the mechanism of sinkhole development, researchers have investigated the correlation between rainfall intensity and sinkholes caused by damaged sewer pipes. In this study, the effect of rainfall intensity on the formation of eroded zones, as well as the occurrence of sinkholes caused by soil erosion due to groundwater infiltration through pipe defects, has been analyzed through model tests. The ground materials in Seoul were represented by weathered granite soil, which is generally used for backfill sewer pipes, and groundwater levels corresponding to three different rainfall intensity conditions were considered. The ground level changes and ground displacements were measured continuously, and the particle image velocimetry (PIV) algorithm was applied to measure the displacement at each position of the model ground. The results indicate that impeding the excessive rise in groundwater levels by securing sufficient sewage treatment facilities can effectively prevent the development of sinkholes caused by pipe defects.
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- 2020
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5. The effect of a brief mindfulness-based intervention on personal recovery in people with bipolar disorder: a randomized controlled trial (study protocol)
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Sunny H. W. Chan, Samson Tse, K. F. Chung, C. H. Yu, Raymond C. K. Chung, and Herman H. M. Lo
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Mindfulness-based intervention ,Personal recovery ,Bipolar disorder ,Psychiatry ,RC435-571 - Abstract
Abstract Background With the advent of the recovery movement in mental health, a humanistic paradigm shift has occurred, placing the focus on personal recovery (i.e., hope, identity, and life meaning) instead of functional or clinical recovery only (i.e., symptom reduction or increases in physical function). Along the journey of recovery, people with bipolar disorder (BD) struggle to cope with recurring mood fluctuations between depression and mania. Mindfulness-based interventions (MBIs) have the potential to result in improvements in personal recovery outcomes. Thus, this protocol will evaluate the efficacy and mechanisms of a brief MBI for helping individuals with BD with their personal recovery. It is hypothesized that adults with BD randomly assigned to a brief MBI intervention will report greater improvements in personal recovery than those in a waiting list control condition. In addition, it is hypothesized that such benefits will be mediated by improvements in emotion awareness, emotion regulation, and illness acceptance. Moreover, the specific stage of BD is hypothesized to moderate the beneficial effects of the brief MBI, such that those in the early stage of BD will report more benefits regarding emotion awareness and emotion regulation, whereas those in the late stage of BD will report more advantages concerning illness acceptance. Method One hundred and fifty-four adults with BD will be recruited from hospitals and community settings for this research project. This study will use a mixed methods design. A randomized-controlled trial will be conducted to compare a brief MBI (four sessions in total) group and a waiting list control group. Assessments will be made at baseline, after intervention, and at six-month follow-up. In addition, a qualitative and participatory research method called Photovoice will be employed to further understand the experiences of the participants who receive the brief MBI along their personal recovery journey. Discussion If the study hypotheses are supported, the findings from this research project will provide empirical support for an alternative treatment. Moreover, by identifying the mechanisms of the beneficial effects of the brief MBI, the findings will highlight process variables that could be specifically targeted to make MBI treatment even more effective in this population. Trial registration This study is registered with the Chinese Clinical Trial Registry (ChiCTR- 1900024658). Registered 20th July 2019.
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- 2019
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6. Bilateral deafness in NK/T-cell lymphoma: EBV DNA prevailed over magnetic resonance imaging
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Ryan C. W. Ho, Chun-To Poon, Birgitta Y. H. Wong, Joseph C. K. Chung, Edward Y. L. Chu, and Yok-Lam Kwong
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Hematology ,General Medicine - Published
- 2022
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7. Supplementary Figures 1-3 from Genetic Ablation of the Amplified-in-Breast Cancer 1 Inhibits Spontaneous Prostate Cancer Progression in Mice
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Jianming Xu, Norman M. Greenberg, Jean Ching-Yi Tien, Lan Liao, Suoling Zhou, and Arthur C-K. Chung
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Supplementary Figures 1-3 from Genetic Ablation of the Amplified-in-Breast Cancer 1 Inhibits Spontaneous Prostate Cancer Progression in Mice
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- 2023
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8. Data from Genetic Ablation of the Amplified-in-Breast Cancer 1 Inhibits Spontaneous Prostate Cancer Progression in Mice
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Jianming Xu, Norman M. Greenberg, Jean Ching-Yi Tien, Lan Liao, Suoling Zhou, and Arthur C-K. Chung
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Although the amplified-in-breast cancer 1 (AIB1; SRC-3, ACTR, or NCoA3) was defined as a coactivator for androgen receptor (AR) by in vitro studies, its role in AR-mediated prostate development and prostate cancer remained unexplored. We report here that AIB1 is expressed in the basal and stromal cells but not in the epithelial cells of the normal mouse prostates. AIB1 deficiency only slightly delayed prostate growth and had no effect on androgen-dependent prostate regeneration, suggesting an unessential role of AIB1 in AR function in the prostate. Surprisingly, when prostate tumorigenesis was induced by the SV40 transgene in transgenic adenocarcinoma of the mouse prostate (TRAMP) mice, AIB1 expression was observed in certain epithelial cells of the prostate intraepithelial neoplasia (PIN) and well-differentiated carcinoma and in almost all cells of the poorly differentiated carcinoma. After AIB1 was genetically inactivated in AIB1−/−/TRAMP mice, the progression of prostate tumorigenesis in most AIB1−/−/TRAMP mice was arrested at the well-differentiated carcinoma stage. Wild-type (WT)/TRAMP mice developed progressive, multifocal, and metastatic prostate tumors and died between 25 and 34 weeks. In contrast, AIB1−/−/TRAMP mice only exhibited PIN and early-stage well-differentiated carcinoma by 39 weeks. AIB1−/−/TRAMP prostates showed much lower cell proliferation than WT/TRAMP prostates. Most AIB1−/−/TRAMP mice could survive more than 35 weeks and died with other types of tumors or unknown reasons. Our results indicate that induction of AIB1 expression in partially transformed epithelial cells is essential for progression of prostate tumorigenesis into poorly differentiated carcinoma. Inhibition of AIB1 expression or function in the prostate epithelium may be a potential strategy to suppress prostate cancer initiation and progression. [Cancer Res 2007;67(12):5965–75]
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- 2023
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9. Can Transcranial Direct-Current Stimulation Alone or Combined With Cognitive Training Be Used as a Clinical Intervention to Improve Cognitive Functioning in Persons With Mild Cognitive Impairment and Dementia? A Systematic Review and Meta-Analysis
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Pablo Cruz Gonzalez, Kenneth N. K. Fong, Raymond C. K. Chung, Kin-Hung Ting, Lawla L. F. Law, and Ted Brown
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tDCS (transcranial direct-current stimulation) ,neuromodulation ,MCI (mild cognitive impairment) ,dementia ,cognitive rehabilitation ,cognitive training ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Background: Transcranial direct-current stimulation (tDCS) facilitates cognitive improvement in healthy and pathological populations. It has been increasingly used in cases of mild cognitive impairment (MCI) and dementia. Our research question is: Can tDCS serve as a clinical intervention for improving the cognitive functions of persons with MCI (PwMCI) and dementia (PwD)?Objective: This systematic review evaluated the evidence to determine the efficacy of tDCS in improving cognitive outcomes in PwD and PwMCI.Methods: A systematic review was conducted of studies published up to November 2017 involving tDCS in cases of MCI and dementia. Studies were ranked according to the level of evidence (Oxford Center for Evidence-Based Medicine) and assessed for methodological quality (Risk of Bias Tool in the Cochrane Handbook for Systematic Reviews of Interventions). Data was extracted on all protocol variables to establish a reference framework for clinical interventions. Different modalities, tDCS alone or combined with cognitive training, compared with sham tDCS were examined in both short and long-term effects. Four randomized control trials (RCTs) with memory outcomes were pooled using the fixed-effect model for the meta-analysis.Results: Twelve studies with 195 PwD and four with 53 PwMCI met the inclusion criteria. Eleven articles were ranked as Level 1b. The results on the meta-analysis on pooled effects of memory indicated a statistically significant medium effect size of 0.39 (p = 0.04) for immediate effects. This improvement was not maintained in the long term 0.15 (p = 0.44).Conclusion: tDCS improves memory in PwD in the short term, it also seems to have a mild positive effect on memory and language in PwMCI. However, there is no conclusive advantage in coupling tDCS with cognitive training. More rigorous evidence is needed to establish whether tDCS can serve as an evidence-based intervention for both populations.
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- 2018
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10. Bilateral Transcutaneous Electrical Nerve Stimulation Improves Lower‐Limb Motor Function in Subjects With Chronic Stroke: A Randomized Controlled Trial
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Patrick W. H. Kwong, Gabriel Y. F. Ng, Raymond C. K. Chung, and Shamay S. M. Ng
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clinical trial ,electrical stimulation ,rehabilitation ,stroke ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
BackgroundTranscutaneous electrical nerve stimulation (TENS) has been used to augment the efficacy of task‐oriented training (TOT) after stroke. Bilateral intervention approaches have also been shown to be effective in augmenting motor function after stroke. The purpose of this study was to compare the efficacy of bilateral TENS combined with TOT versus unilateral TENS combined with TOT in improving lower‐limb motor function in subjects with chronic stroke. Methods and ResultsEighty subjects were randomly assigned to bilateral TENS+TOT or to unilateral TENS+TOT and underwent 20 sessions of training over a 10‐week period. The outcome measures included the maximal strength of the lower‐limb muscles and the results of the Lower Extremity Motor Coordination Test, Berg Balance Scale, Step Test, and Timed Up and Go test. Each participant was assessed at baseline, after 10 and 20 sessions of training and 3 months after the cessation of training. The subjects in the bilateral TENS+TOT group showed greater improvement in paretic ankle dorsiflexion strength (β=1.32; P=0.032) and in the completion time for the Timed Up and Go test (β=−1.54; P=0.004) than those in the unilateral TENS+TOT group. However, there were no significant between‐group differences for other outcome measures. ConclusionsThe application of bilateral TENS over the common peroneal nerve combined with TOT was superior to the application of unilateral TENS combined with TOT in improving paretic ankle dorsiflexion strength after 10 sessions of training and in improving the completion time for the Timed Up and Go test after 20 sessions of training. Clinical Trial RegistrationURL: http://www.clinicaltrials.gov. Unique identifier: NCT02152813.
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- 2018
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11. A Constraint-Based Hybrid Heuristic Solver for Practical School Timetabling.
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Alvin C. M. Kwan, Ken C. K. Chung, and Kammy K. K. Yip
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- 2003
12. An Automated School Timetabling System Using Hybrid Intelligent Techniques.
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Alvin C. M. Kwan, Ken C. K. Chung, Kammy K. K. Yip, and Vincent W. L. Tam
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- 2003
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13. Single-joint shear strength of micro Cu pillar solder bumps with different amounts of intermetallics.
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Y. J. Chen, C. K. Chung, C. R. Yang, and C. Robert Kao
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- 2013
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14. Long-term results of robotic-assisted nasopharyngectomy for recurrent nasopharyngeal carcinoma
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Raymond K. Tsang, Walter C. P. Chan, Floyd Christopher Holsinger, Joseph C. K. Chung, Velda L. Y. Chow, Jimmy Y. W. Chan, Wai‐Kuen Ho, and William I. Wei
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Adult ,Aged, 80 and over ,Salvage Therapy ,Nasopharyngeal Carcinoma ,Nasopharyngeal Neoplasms ,Middle Aged ,Survival Rate ,Otorhinolaryngology ,Pharyngectomy ,Robotic Surgical Procedures ,Humans ,Prospective Studies ,Neoplasm Recurrence, Local ,Aged - Abstract
We have previously reported our early experience in robotic-assisted nasopharyngectomy. The current case series is a report of our experience in 33 robotic-assisted nasopharyngectomy.Prospective series of patients who underwent robotic-assisted nasopharyngectomy for local recurrent nasopharyngeal carcinoma from January 2010 to March 2019.Thirty-one patients underwent robotic-assisted nasopharyngectomy with two additional second procedure for positive margin. Median age is 55 years (29-85). Twenty-five patients had rT1 disease and six patients had tumor invaded sphenoid floor (rT3). Median operative time was 227 min and median blood loss was 200 ml. The median follow-up period for all patients were 38 months. Four patients had local recurrence. Five-year local control rate, overall survival, and disease-free survival are 85.1%, 55.7%, and 69.1%, respectively.Robotic-assisted nasopharyngectomy for recurrent nasopharyngectomy was showed to have a high local control rate. The operating time was comparable to open surgery.
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- 2022
15. A structural equation model of the relationship between muscle strength, balance performance, walking endurance and community integration in stroke survivors.
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P W H Kwong, S S M Ng, R C K Chung, and G Y F Ng
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Medicine ,Science - Abstract
To use structural equation modelling (SEM) to determine (1) the direct and indirect associations of strength of paretic lower limb muscles with the level of community integration, and (2) the direct association of walking endurance and balance performance with the level of community integration in community-dwelling stroke survivors.In this cross-sectional study of 105 stroke survivors, the Subjective Index of Physical and Social Outcome (SIPSO) was used to measure the level of community integration. Lower-limb strength measures included isometric paretic ankle strength and isokinetic paretic knee peak torque. The Berg Balance Scale (BBS) and the 6-minute walk test (6MWT) were used to evaluate balance performance and walking endurance, respectively.SEM revealed that the distance walked on the 6MWT had the strongest direct association with the SIPSO score (β = 0.41, p
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- 2017
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16. An Architecture for Solving Boolean Satisfiability Using Runtime Configurable Hardware.
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C. K. Chung and Philip Heng Wai Leong
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- 1999
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17. The availability and quality of breastfeeding guidelines for women with spinal cord injury: a narrative review
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Leah Rosetti, Stacy Elliott, Amanda H. X. Lee, Laura A. McCracken, Shea Hocaloski, Karen Hodge, Ineta Zobina, Christina-Anastasia Rapidi, Prokopios Manthos, Aggeliki Galata, Tiev Miller, Raymond C. K. Chung, and Andrei V. Krassioukov
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Breast Feeding ,Neurology ,Health Personnel ,Humans ,Disabled Persons ,Female ,Neurology (clinical) ,General Medicine ,Spinal Cord Injuries - Abstract
Narrative review.To evaluate the availability and quality of breastfeeding guidelines for women with spinal cord injury (SCI).International Collaboration on Repair Discoveries (ICORD), Department of Medicine, Vancouver, BC.An environmental scan restricted to English language literature was performed to identify existing postpartum and breastfeeding guidelines. Guidelines were evaluated using a structured, validated tool (AGREE II) by 13 appraisers [medical/research experts (n = 10) and those with lived experience (n = 3)] from Vancouver and two international sites. Seven guidelines were evaluated across Domain 1 of the AGREE II tool to determine if they were applicable to mothers with SCI/physical disabilities. Domains 2 to 7 were evaluated if the guideline made mention of the SCI population.Of the seven guidelines evaluated, only one mentioned SCI (Postpartum Care in SCI from BC Women's Hospital). Other guidelines were excluded from further evaluation as they did not address the issue of breastfeeding in women with SCI. The overall scaled score for this guideline was 34.5%. There was significant variability between domains but no AGREE II domain scored greater than 50%, indicating substantial limitations.Current breastfeeding guidelines are not targeted to persons with SCI. The one guideline that made mention of women with SCI had significant global deficits. This highlights the importance of developing guidelines for health care providers focused specifically on women with SCI to support and optimize breastfeeding in this unique population for the benefit of mother and infant across the lifespan.
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- 2021
18. Recovering LSHGCs and SHGCs from stereo.
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Ronald C.-K. Chung and Ramakant Nevatia
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- 1992
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19. Thermodynamic and structural evolution of mechanically milled and swift heavy ion irradiated Er2Ti2O7 pyrochlore
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Maik Lang, Joerg C. Neuefeind, Antonio F. Fuentes, Eric C. O'Quinn, Alexandra Navrotsky, C. K. Chung, and Hongwu Xu
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010302 applied physics ,Materials science ,Polymers and Plastics ,Annealing (metallurgy) ,Metals and Alloys ,Pyrochlore ,Thermodynamics ,02 engineering and technology ,Calorimetry ,engineering.material ,Neutron scattering ,021001 nanoscience & nanotechnology ,01 natural sciences ,Endothermic process ,Electronic, Optical and Magnetic Materials ,law.invention ,Differential scanning calorimetry ,Swift heavy ion ,law ,0103 physical sciences ,Ceramics and Composites ,engineering ,Crystallization ,0210 nano-technology - Abstract
Design and synthesis of thermodynamically metastable yet kinetically achievable materials possessing various desired functional and physical properties have recently drawn tremendous scientific-attention. In addition to conventional heat treatments and wet chemistry approaches, energy deposition into materials can induce unique nonequilibrium phases with distinct structures, chemistry, energetics, and properties. Mechanochemical synthesis and ion beam irradiation are two processing techniques that provide access to phases and states far from equilibrium. By a combination of high temperature oxide melt solution calorimetry, differential scanning calorimetry (DSC), neutron pair distribution function (PDF) analysis, and supplementary powder X-ray diffraction (XRD), the energetics and multiscale structural evolution on annealing of ball milled and swift heavy ion irradiated Er2Ti2O7 pyrochlore were investigated. Despite very similar structural modifications of local atomic arrangements and only minor differences in the long range structure, both types of damage yield significant difference in the energetics of the produced material. The energy of destabilization in the milled sample (70.2 ± 8.2 kJ/mol) is much less endothermic than that in the irradiated sample (457.3 ± 8.0 kJ/mol). The DSC profiles, supported by neutron scattering, X-ray diffraction, and solution calorimetry, reveal decoupled annealing events in different temperature ranges, separating crystallization of long range pyrochlore structure from annealing of short range weberite-like domains.
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- 2019
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20. Enthalpies of formation and phase stability relations of USi, U3Si5 and U3Si2
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Andrew T. Nelson, C. K. Chung, Ping Yang, Anna Shelyug, Joshua T. White, Xiaofeng Guo, Hongwu Xu, Hakim Boukhalfa, Enrique R. Batista, Gaoxue Wang, Tashiema L. Wilson, Artaches Migdisov, Robert Roback, and Alexandra Navrotsky
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Nuclear and High Energy Physics ,Materials science ,Intermetallic ,Thermodynamics ,02 engineering and technology ,Calorimetry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Standard enthalpy of formation ,010305 fluids & plasmas ,Tetragonal crystal system ,Nuclear Energy and Engineering ,0103 physical sciences ,General Materials Science ,Density functional theory ,Chemical stability ,Binary system ,0210 nano-technology ,Phase diagram - Abstract
U–Si intermetallic compounds have drawn great attention due to their potential application as nuclear fuels. However, the thermodynamic properties and phase equilibria of this binary system from ambient to high temperature conditions are not fully understood. Via high temperature oxidative drop calorimetry and detailed characterization of the initial and final phases, we have experimentally determined the standard enthalpies of formation of USi and U3Si5.07 at 298 K to be −43.2 ± 6.2 and −43.8 ± 9.0 kJ/mol·atom, respectively. The energetics of the tetragonal USi (t-USi, space group I4/mmm) phase has also been calculated with Density Functional Theory (DFT) for the first time. Combining the obtained formation enthalpies with the heat capacities measured previously, we assessed the thermodynamic stability of t-USi relative to a phase assemblage of two other U–Si phases, U3Si5.07 and U3Si2, from ambient temperature to 1200 K. The tetragonal USi is thermodynamically more stable than U3Si5.07 + U3Si2, which supports previously published phase diagram (H. Okamoto and T. Massalski, 1990 [1]): specifically, at least one stable USi phase exists when the U content is 50 at.%. Further thermodynamic and phase equilibrium studies are needed for a more comprehensive understanding of the U–Si system across broader compositional and temperature ranges.
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- 2019
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21. The Effects of Storytelling With or Without Social Contextual Information Regarding Eye Gaze and Visual Attention in Children with Autistic Spectrum Disorder and Typical Development: A Randomized, Controlled Eye-Tracking Study
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Wilson Y F, Tang, Kenneth N K, Fong, and Raymond C K, Chung
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Autism Spectrum Disorder ,Research Design ,Communication ,Humans ,Fixation, Ocular ,Child ,Eye-Tracking Technology - Abstract
This study examined the effects of storytelling with or without contextual information on children with autism spectrum disorder (ASD) and typical development (TD) using eye-tracker. They were randomized into two groups-the stories included and did not include social contextual information respectively. Training was delivered in groups, with eight sessions across four weeks, 30 min/session. Participants' fixation duration, visit duration, and fixation count on human faces from 20 photos and a video were recorded. Our findings revealed that storytelling with social contextual information enhanced participants' eye gazes on eyes/ faces in static information (photos) for both children with ASD and TD, but the same advantage could not be seen for children with ASD in regard to dynamic information (videos).Clinical Trial Registration Number (URL: http://www.clinicaltrials.gov ): NCT04587557.
- Published
- 2021
22. Germ cell nuclear factor regulates gametogenesis in developing gonads.
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Davood Sabour, Xueping Xu, Arthur C K Chung, Damien Le Menuet, Kinarm Ko, Natalia Tapia, Marcos J Araúzo-Bravo, Luca Gentile, Boris Greber, Karin Hübner, Vittorio Sebastiano, Guangming Wu, Hans R Schöler, and Austin J Cooney
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Medicine ,Science - Abstract
Expression of germ cell nuclear factor (GCNF; Nr6a1), an orphan member of the nuclear receptor gene family of transcription factors, during gastrulation and neurulation is critical for normal embryogenesis in mice. Gcnf represses the expression of the POU-domain transcription factor Oct4 (Pou5f1) during mouse post-implantation development. Although Gcnf expression is not critical for the embryonic segregation of the germ cell lineage, we found that sexually dimorphic expression of Gcnf in germ cells correlates with the expression of pluripotency-associated genes, such as Oct4, Sox2, and Nanog, as well as the early meiotic marker gene Stra8. To elucidate the role of Gcnf during mouse germ cell differentiation, we generated an ex vivo Gcnf-knockdown model in combination with a regulated CreLox mutation of Gcnf. Lack of Gcnf impairs normal spermatogenesis and oogenesis in vivo, as well as the derivation of germ cells from embryonic stem cells (ESCs) in vitro. Inactivation of the Gcnf gene in vivo leads to loss of repression of Oct4 expression in both male and female gonads.
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- 2014
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23. MicroRNAs in Diabetic Kidney Disease
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Rong Li, Arthur C. K. Chung, Xueqing Yu, and Hui Y. Lan
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Diseases of the endocrine glands. Clinical endocrinology ,RC648-665 - Abstract
Rapid growth of diabetes and diabetic kidney disease exerts a great burden on society. Owing to the lack of effective treatments for diabetic kidney disease, treatment relies on drugs that either reduces its progression or involve renal replacement therapies, such as dialysis and kidney transplantation. It is urgent to search for biomarkers for early diagnosis and effective therapy. The discovery of microRNAs had lead to a new era of post-transcriptional regulators of gene expression. Studies from cells, experimental animal models and patients under diabetic conditions demonstrate that expression patterns of microRNAs are altered during the progression of diabetic kidney disease. Functional studies indicate that the ability of microRNAs to bind 3′ untranslated region of messenger RNA not only shows their capability to regulate expression of target genes, but also their therapeutic potential to diabetic kidney disease. The presence of microRNAs in plasma, serum, and urine has been shown to be possible biomarkers in diabetic kidney disease. Therefore, identification of the pathogenic role of microRNAs possesses an important clinical impact in terms of prevention and treatment of progression in diabetic kidney disease because it allows us to design novel and specific therapies and diagnostic tools for diabetic kidney disease.
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- 2014
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24. Rehabilitation interventions for unilateral neglect after stroke: a systematic review from 1997 through 2012
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Nicole Y. H. Yang, Dong eZhou, Raymond C. K. Chung, Cecilia W. P. Li, and Kenneth N. K. Fong
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Rehabilitation ,Stroke ,Systematic review ,unilateral neglect ,Behavioral Inattention Test ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
A systematic review of the effectiveness of rehabilitation for persons with unilateral neglect (UN) after stroke was conducted by searching the computerized databases from 1997 through 2012. Randomized controlled trials (RCTs) of neglect treatment strategies for stroke patients which used the Behavioral Inattention Test (BIT) as the primary outcome measure were eligible for inclusion. Out of 201 studies initially identified, 12 RCTs covering 277 participants were selected for analysis. All had the same weakness of low power with smaller samples and limitation in the blinding of the design. Prism Adaptation (PA) was the most commonly used intervention while continuous Theta-burst stimulation (cTBS) appeared to be a new approach. Meta-analysis showed that for immediate effects, the BIT conventional subscore had a significant and large mean effect size (ES=0.76; 95% CI 0.28-1.23; p=0.002) whereas the BIT total score showed a modestly significant mean ES (ES=0.55; 95% CI 0.16-0.94; p=0.006). No significant mean ES in sensitivity analysis was found for long-lasting effects across all BIT outcomes. PA appeared to be the most effective intervention based on the results of pooled analysis. More rigorous studies should be done on repetitive transcranial magnetic stimulation (rTMS) before it can be concluded that it is a promising treatment for UN.
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- 2013
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25. Mass spectrometry imaging and monitoring of
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Arthur C K, Chung, Xuan, Li, Wai-Chung, Li, Tao, Wang, Hin-Kiu, Lee, Lijian, Jin, Zongwei, Cai, and Ken Cham-Fai, Leung
- Abstract
An increasing number of studies have reported the use of various nanoparticles to encapsulate cisplatin, a frontline chemotherapeutic drug against a broad-spectrum of cancers, for overcoming its inherent drawbacks in clinical applications. Nevertheless, few analytical methods or instruments could provide the precise distribution information on this platinum drug in biological tissues. Herein, we provide the first evidence of applying matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) to assess the spatial distribution of cisplatin released from the cell-penetrating poly(disulfide) (CPD)-modified hollow iron oxide nanoparticles (hFe
- Published
- 2020
26. Profiles, variability, and predictors of urinary benzotriazoles and benzothiazoles in pregnant women from Wuhan, China
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Zongwei Cai, Yuanyuan Li, Hongxiu Liu, Yanjun Hong, Wei Xia, Yanqiu Zhou, Xiaojie Sun, Hangbiao Jin, Hongzhi Zhao, Wenxin Zhang, Arthure C. K. Chung, Wenyu Liu, Jing Fang, Jiufeng Li, Shunqing Xu, and Yangqian Jiang
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Adult ,China ,Urinary system ,media_common.quotation_subject ,Physiology ,Context (language use) ,Urine ,010501 environmental sciences ,01 natural sciences ,Young Adult ,Pregnancy ,Humans ,Medicine ,Benzothiazoles ,Health risk ,lcsh:Environmental sciences ,Menstrual cycle ,0105 earth and related environmental sciences ,General Environmental Science ,media_common ,Exposure assessment ,lcsh:GE1-350 ,business.industry ,010401 analytical chemistry ,Confounding ,Reproducibility of Results ,Environmental Exposure ,Triazoles ,medicine.disease ,0104 chemical sciences ,Female ,business ,Environmental Monitoring - Abstract
Background: Benzotriazoles (BTRs) and benzothiazoles (BTHs) are emerging contaminants with high production volume worldwide, which exhibit potential health risk to human. To date, little is known about the exposure of BTRs and BTHs (BTs) on human, especially in the context of pregnancy. Objectives: We aimed to characterize the exposure profiles, temporal variability, and potential predictors of urinary BTs during pregnancy. Methods: Between 2014 and 2015, we recruited 856 pregnant women in Wuhan who provided urine samples at three trimesters (13.1 ± 1.1, 23.7 ± 3.2, and 35.7 ± 3.4 gestational weeks). We measured the urinary concentrations of five BTRs (1‑H‑benzotriazole, 1‑hydroxy‑benzotriazole, xylyltriazole, tolyltriazole, 5‑chloro‑1‑H‑benzotriazole) and five BTHs (benzothiazole, 2‑hydroxy‑benzothiazole, 2‑methylthio‑benzothiazole, 2‑amino‑benzothiazole, 2‑thiocyanomethylthio‑benzothiazole) to characterize the exposure profiles of BTs. We calculated the intra-class correlation coefficients (ICCs) to assess the temporal variability and investigated potential predictors of urinary BTs by using the mixed models. Results: Most of the targeted BTs were detected in over 50% of urine samples, except for 5‑chloro‑1‑H‑benzotriazole (9.3%) and 2‑thiocyanomethylthio-benzothiazole (1.4%). The predominant BTRs in urine was 1‑hydroxy‑benzotriazole [Geometric Mean (GM): 0.77 ng/mL]. Benzothiazole was the major derivative in urine samples with a GM concentration of 1.6 ng/mL. Correlations among BTHs (r = 0.04–0.39) were higher than that among BTRs (r = 0.02–0.14). The exposure pattern was constant at low level and co-exposure to all the targeted compounds was infrequent during pregnancy. Urinary concentrations of BTRs exhibited considerable within-subject variation (ICCs: 0.12–0.56) during pregnancy. Relatively high temporal reliability was observed for urinary concentrations of BTHs with ICCs ranging from 0.42 to 0.85. It was found that parity, household income, pregnancy occupational status, sampling season and menstrual cycle were associated with urinary concentrations of BTs in pregnant women (P
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- 2018
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27. FLORAL PHENOLOGY AND POLLINATION BIOLOGY OF VATICA YEECHONGII (DIPTEROCARPACEAE)
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L. S. L. Chua, Noorma Wati Haron, R. C. K. Chung, and M. Suhaida
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0106 biological sciences ,Dipterocarpaceae ,Pollination ,Phenology ,Endangered species ,Forestry ,Biology ,biology.organism_classification ,medicine.disease_cause ,010603 evolutionary biology ,01 natural sciences ,Pollinator ,Pollen ,Botany ,medicine ,Vatica ,010606 plant biology & botany - Published
- 2018
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28. Thermodynamics of radiation induced amorphization and thermal annealing of Dy2Sn2O7 pyrochlore
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Alexandra Navrotsky, Maik Lang, Hongwu Xu, and C. K. Chung
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Materials science ,Polymers and Plastics ,Stannate ,Annealing (metallurgy) ,Metals and Alloys ,Pyrochlore ,Thermodynamics ,Recrystallization (metallurgy) ,02 engineering and technology ,Calorimetry ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Differential scanning calorimetry ,Swift heavy ion ,Ceramics and Composites ,engineering ,Irradiation ,0210 nano-technology - Abstract
Thermodynamics and annealing behavior of swift heavy ion amorphized Dy2Sn2O7 pyrochlore were studied. Its amorphization enthalpy, defined as the total energetic difference between the irradiation amorphized and undamaged Dy2Sn2O7 states, was determined to be 283.6 ± 6.5 kJ/mol by high temperature oxide melt drop solution calorimetry. It has been an enigma that stannate and some other pyrochlores do not follow the general rA/rB−radiation resistance relation seen in most pyrochlore systems. In this work, we use the amorphization enthalpy, which reflects all the complex chemical and structural characteristics, as a more effective parameter to correlate the radiation damage resistance of pyrochlores with their compositions. It successfully explains the superior radiation damage resistance of the stannate pyrochlores compared with titanate pyrochlores. Differential scanning calorimetry (DSC) reveals a strong exothermic event starting at 978 K, which is attributed to long-range recrystallization based on X-ray diffraction (XRD) analysis, similar to the effect previously observed in Dy2Ti2O7. A second pronounced heat event beginning at ∼1148 K, which results from local structural rearrangement, is clearly decoupled from the first event for irradiated Dy2Sn2O7. Both the heat releases measured by DSC on heating to 1023 and 1473 K, and the excess enthalpies of the annealed samples indicate that the recovery to the original, ordered state was not fully achieved up to even 1473 K, despite XRD showing the apparent restoration of crystalline pyrochlore structure. The remaining metastability may be attributed to local disorder in the form of weberite-like short-range domains in the recrystallized material. Intriguingly, the second event for different pyrochlores generally starts at similar temperatures while the onset of the long range recrystallization is compositionally dependent. The amorphization and thermal annealing behavior observed in irradiated Dy2Sn2O7 may provide insights into the general mechanisms of radiation damage and recovery of pyrochlores relevant to their nuclear applications.
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- 2018
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29. Thermodynamic and structural evolution of Dy2Ti2O7 pyrochlore after swift heavy ion irradiation
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Maik Lang, Jacob Shamblin, Igor M. Gussev, Alexandra Navrotsky, Anna Shelyug, C. K. Chung, and Eric C. O'Quinn
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010302 applied physics ,Materials science ,Polymers and Plastics ,Annealing (metallurgy) ,Neutron diffraction ,Metals and Alloys ,Pyrochlore ,Recrystallization (metallurgy) ,Thermodynamics ,02 engineering and technology ,Calorimetry ,engineering.material ,021001 nanoscience & nanotechnology ,01 natural sciences ,Electronic, Optical and Magnetic Materials ,Swift heavy ion ,Differential scanning calorimetry ,0103 physical sciences ,Ceramics and Composites ,engineering ,Irradiation ,0210 nano-technology - Abstract
Utilizing a combined approach of high temperature calorimetry and neutron total scattering, we obtained critical insights into the energetics and annealing of radiation damage in swift heavy ion irradiated Dy2Ti2O7 pyrochlore. Oxide melt solution calorimetry reveals that the radiation amorphized Dy2Ti2O7 is destabilized by 243 kJ/mol compared to fully ordered, crystalline pyrochlore. Differential scanning calorimetry of the amorphized sample shows a rapid exothermic event starting at 1063 K, which, based on neutron structural analysis, is related to recrystallization. The heat release on annealing to 1473 K, –137 kJ/mol, is only about half of the total energetic difference between the ordered crystalline and amorphized samples, despite the apparent recovery of long-range pyrochlore-like ordering. Detailed neutron structural analysis confirms the persistence of residual damage in the 1473 K annealed sample. This metastability is attributed to local disorder in the form of weberite-like short-range domains in the recrystallized material. The annealing of radiation damage appears to be a complex, multistep process with decoupled short- and long-range damage recovery. Heating well above the initial recrystallization temperature does not erase all the damage, which may have important implications for the use of pyrochlores as nuclear waste forms.
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- 2018
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30. Long-term Complications of Palate Surgery: A Multicenter Study of 217 Patients
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Brian W. Rotenberg, Ottavio Piccin, Kathleen A. Pang, Scott B. Pang, Edward B. Pang, Yiong Huak Chan, Hyung Chae Yang, Kenny P. Pang, Sudipta Chandra, Filippo Montevecchi, Joseph C. K. Chung, Claudio Vicini, and Vikas Agrawal
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Long term complications ,Adult ,Male ,medicine.medical_specialty ,Palate surgery ,Time Factors ,Velopharyngeal Insufficiency ,complications ,Nose ,Severity of Illness Index ,NO ,03 medical and health sciences ,0302 clinical medicine ,Postoperative Complications ,Throat ,medicine ,Humans ,030223 otorhinolaryngology ,obstructive sleep apnea ,Retrospective Studies ,Sleep Apnea, Obstructive ,business.industry ,Palate ,Pharyngitis ,Middle Aged ,Plastic Surgery Procedures ,medicine.disease ,Surgery ,Obstructive sleep apnea ,medicine.anatomical_structure ,Treatment Outcome ,Otorhinolaryngology ,Multicenter study ,030220 oncology & carcinogenesis ,Sphincter ,Voice change ,Female ,business ,Body mass index - Abstract
OBJECTIVES/HYPOTHESIS To investigate long-term complications of newer reconstructive palate surgery techniques. STUDY DESIGN Retrospective case-series analysis. METHODS Retrospective six-country clinical study of OSA patients who had nose and palate surgery. RESULTS There were 217 patients, mean age = 43.9 ± 12.5 years, mean body mass index = 25.9 ± 4.7, mean preoperative apnea-hypopnea index [AHI] = 30.5 ± 19.1, follow-up 41.3 months. A total of 217 palatal procedures were performed, including 50 expansion sphincter pharyngoplasties (ESP), 34 functional expansion pharyngoplasties (FEP), 40 barbed reposition pharyngoplasties (BRP), 64 modified uvulopalatopharyngoplasties (mUPPP), 11 uvulopalatal flap procedures (UPF), nine suspension pharyngoplasties (SP), eight relocation pharyngoplasties (RP), and one z-pharyngoplasty (ZPP). Complications included were constant and/or felt twice per week; dry throat (7.8%), throat lump feeling (11.5%), throat phlegm (10.1%), throat scar feeling (3.7%), and difficulty swallowing (0.5%). Of the 17 patients who had a dry throat complaint, two were constant (one SP, one RP), 15 were occasional (10 mUPPP, three SP, two BRP). Of the 25 patients with the throat lump feeling, four were constant (three RP, one ZPP), 21 were occasional (10 mUPPP, five SP, five UPF, one BRP). Of the 22 patients with the throat phlegm feeling, four were constant (two SP, two RP), 18 were occasional (10 mUPPP, four BRP, two FEP, two SP). Of the eight patients with throat scar feeling, eight were occasional (four SP, two mUPPP, one FEP, one RP), none were constant. One patient had difficulty swallowing (RP procedure). There was no velopharyngeal incompetence, taste disturbance, nor voice change. Highest symptom complaints were mUPPP, SP, and RP, whereas the lowest symptom complaint was ESP. CONCLUSIONS Newer palatal techniques have shown to have less long-term complications compared to the older ablative techniques. LEVEL OF EVIDENCE 4 Laryngoscope, 130:2281-2284, 2020.
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- 2019
31. Mitochondrial protective and anti-apoptotic effects of Rhodiola crenulata extract on hippocampal neurons in a rat model of Alzheimer's disease
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Jun-Mei Wang, Ze-qiang Qu, Yuan-Shan Zeng, Peter C. K. Chung, and Jin-Lang Wu
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0301 basic medicine ,biology ,Chemistry ,Dentate gyrus ,Hippocampus ,Caspase 3 ,Pharmacology ,Hippocampal formation ,Streptozotocin ,Neuroprotection ,lcsh:RC346-429 ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,Developmental Neuroscience ,biology.protein ,medicine ,Cytochrome c oxidase ,NeuN ,030217 neurology & neurosurgery ,lcsh:Neurology. Diseases of the nervous system ,medicine.drug ,nerve regeneration ,Alzheimer′s disease ,intracerebroventricular injection ,streptozotocin ,neuronal apoptosis ,neuroprotection ,cytochrome c oxidase ,adenosine triphosphate ,caspase-3 ,neural regeneration - Abstract
In our previous study, we found that the edible alcohol extract of the root of the medicinal plant Rhodiola crenulata (RCE) improved spatial cognition in a rat model of Alzheimer's disease. Another study from our laboratory showed that RCE enhanced neural cell proliferation in the dentate gyrus of the hippocampus and prevented damage to hippocampal neurons in a rat model of chronic stress-induced depression. However, the mechanisms underlying the neuroprotective effects of RCE are unclear. In the present study, we investigated the anti-apoptotic effect of RCE and its neuroprotective mechanism of action in a rat model of Alzheimer's disease established by intracerebroventricular injection of streptozotocin. The rats were pre-administered RCE at doses of 1.5, 3.0 or 6.0 g/kg for 21 days before model establishment. ATP and cytochrome c oxidase levels were significantly decreased in rats with Alzheimer's disease. Furthermore, neuronal injury was obvious in the hippocampus, with the presence of a large number of apoptotic neurons. In comparison, in rats given RCE pretreatment, ATP and cytochrome c oxidase levels were markedly increased, the number of apoptotic neurons was reduced, and mitochondrial injury was mitigated. The 3.0 g/kg dose of RCE had the optimal effect. These findings suggest that pretreatment with RCE prevents mitochondrial dysfunction and protects hippocampal neurons from apoptosis in rats with Alzheimer's disease.
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- 2017
32. Poster Presentations (PP01-PP67)
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P. Santos-Moreno, J. Bello, A. Palomino, L. Villarreal, D. Zambrano, L. Amador, O. Andrade, A. Urbina, C. Guzman, M. Cubides, A. Arbelaez, R. Valle-Onate, C. Galarza-Maldonado, K. Brickmann, F. Furst, S. Kielhauser, J. Hermann, H.-P. Brezinsek, W. Graninger, V. Ziaee, P. Sadghi, M.-H. Moradinejad, D. H. Yoo, J.-H. Woo, Y. J. Kim, J. J. Kim, C.-B. Choi, Y.-K. Sung, T.-H. Kim, J.-B. Jun, S.-C. Bae, W. Park, K. Joo, M.-J. Lim, S.-R. Kwon, K.-H. Jung., S.-Y. Bang, S.-R. Park, K. W. Lee, S. Donmez, O. N. Pamuk, G. E. Pamuk, A. Aksoy, H. Almoallim, A. Almasari, H. Khadawardi, A. Haroyan, M. Petrova, D. Shah, A. Bhatnagar, A. Wanchu, M. Okada, F. E. Ardakani, M. Owlia, S. Hesami, M. B. Owlia, H. Soleimani, H. S. Saleh-Abadi, M. Lotfi, A. Dehghan, B. Saberir, M. H. Moradinejad, G. Zamani, A. Aghamohammadi, H. Soheili, S. shahinpour, H. Abolhassani, A. Hirbod, N. Arandi, M. Tavassoli, N. Parvaneh, N. Rezaei, Z. Rezaieyazdi, M.-R. Hatef, S. Sedighi, H. Ah Kim, C. K. Chung, R. Martinez Perez, M. Leon, J. Uceda, S. Rodriguez Montero, A. Munoz, M. Velloso, J. Marenco, N. Tsiliakou, O. Giotakos, L. Koutsogeorgopoulou, D. Kassimos, N. Fernandes, V. Silva, R. Hernandez Sanchez, P. Gonzalez Moreno, J. Uceda Montanes, J. Marenco de la Fuente, E. Aytekin, S. E. Demir, S. C. Okur, N. S. Caglar, S. Tutun, S. Eroglu Demir, A. Rezvani, N. Ozaras, E. Poyraz, M. Guneser, H. K. Asik Celik, I. Batmaz, M. Sariyildiz, B. Dilek, I. Yildiz, O. Ayyildiz, K. Nas, R. Cevik, T. Gunay, Y. Garip, H. Bodur, T. Baykal, B. Seferoglu, K. Senel, M. Kara, T. Tiftik, A. Kaya, M. Engin Tezcan, M. Akif Ozturk, S. Ozel, A. Akinci, L. Ozcakar, D. Saliha Eroglu, A. Ebru, K. Ilhan, A. Teoman, D. Gulis, F. Ileana, G. Linda, P. Cristina, D. Laura, S. Simona, R. Simona, S. Ataman, S. Venkatesan, L. Ng, C. Carbone, E. Jaeggi, E. Silverman, S. Kamphuis, N. Mak, L. Lim, D. Levy, E. Ciobanu, M. Mazur, L. Mazur-Nicorici, S. Jin Park, E.-J. Cheon, C.-K. Chung, N. Tugnet, J. Dixey, C. Cheng, S. Schmidt, K. Stoy, A. Seisenbayev, G. Togizbaev, F. Gonzalez, L. Villareal, C. Galarza, E. Nikiphorou, A. MacGregor, S. Morris, D. James, A. Young, M. A. Alomari, R. Shammaa, D. M. Shqair, K. Alawneh, O. F. Khabour, T. C. Namey, S. Kolahi, A. G. Haghjoo, M.-J. Lee, C.-H. Suh, Y.-W. Park, H.-S. Lee, Y.-M. Kang, S.-C. Shim, W.-K. Lee, H. Park, J. Lee, R.-H. Wong, C.-H. Huang, J. Cheng-Chung Wei, S.-P. Chiou, Y.-C. Tu, S. Ok, J.-O. Kim, J.-S. Lee, I.-H. Sung, J.-H. Kim, S.-H. Lee, J. Choi, S. Kim, R. Song, Y.-A. Lee, S.-J. Hong, H.-I. Yang, K. Matsui, K. Yoshida, H. Oshikawa, T. Kobayashi, H. Nakano, M. Utsunomiya, M. Kimura, O. Seniz, J. Yoon, N. Yoon, S. Lee, and Y. Kim
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medicine.medical_specialty ,Rheumatology ,business.industry ,medicine ,Pharmacology (medical) ,Medical physics ,business - Published
- 2012
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33. (276–279) Proposals to provide for registration of new names and nomenclatural acts
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Kanchi N. Gandhi, David J. Patterson, Nicky Nicolson, Stefan Dressler, Dmitry V. Geltman, Ali A. Dönmez, Jiri Kvacek, Liliana Katinas, Hugh F. Glen, Michelle J. Price, Xian-Chun Zhang, Malapati K. Janarthanam, Valéry Malécot, Wolf-Henning Kusber, Alexander B. Doweld, Giuseppe C. Zuccarello, Hidetoshi Nagamasu, Craig W. Schneider, Jirina Dasková, Paul M. Kirk, Irina V. Belyaeva, Regine Jahn, Mary E. Barkworth, Alan Paton, Mark F. Watson, Peter F. Stevens, Zhu-Liang Yang, Gideon F. Smith, Alexander N. Sennikov, Niels Klazenga, Richard C. K. Chung, Werner Greuter, Christina Flann, Martin J. Head, Karol Marhold, Gerrit Davidse, Fred R. Barrie, David G. Mann, and Willem F. Prud'homme van Reine
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0106 biological sciences ,010506 paleontology ,Plant Science ,TAXONOMY ,010603 evolutionary biology ,01 natural sciences ,purl.org/becyt/ford/1 [https] ,Ciencias Biológicas ,World Wide Web ,Geography ,Taxonomy (general) ,NOMENCLATURE ,PLANTS ,purl.org/becyt/ford/1.6 [https] ,Nomenclature ,PROPOSALS ,Ciencias de las Plantas, Botánica ,CIENCIAS NATURALES Y EXACTAS ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences - Abstract
The Melbourne Congress of 2011 authorized a Special Committee on Registration of Algal and Plant Names (including fossils), which was established the following year (Wilson in Taxon 61: 878–879. 2012). Its explicit mandate was “to consider what would be involved in registering algal and plant names (including fossils), using a procedure analogous to that for fungal names agreed upon in Melbourne and included in the Code as Art. 42”, but expectations at the Nomenclature Section in Melbourne went farther than that. There was the hope that registration systems for at least some of the main groups would soon be set up, to be used and tested on a voluntary basis and, if found to be generally accepted, would persuade the subsequent Congress in Shenzhen, in 2017, to declare registration of new names an additional requirement for valid publication. The Melbourne Congress also approved mandatory registration of nomenclatural novelties in fungi, starting on 1 Jan 2013. The new Art. 42 of the Code (McNeill & al. in Regnum Veg. 154. 2012) requires authors to register any fungal nomenclatural novelty, prior to publication, with a recognized repository, whereupon they are provided with a unique identifier for each name, to be included in the protologue along with other Code-mandated information. Years before registration became mandatory, mycologists had been encouraged, often prompted by journal editors, to register their nomenclatural novelties prior to publication. Most complied. Consequently, when mandatory registration was proposed, it had strong support from the mycological community. There are currently three recognized repositories for fungal names. They vary somewhat in how they operate, but they share records of their registered novelties as soon as publication has been effected. One consequence of implementing mandatory registration is that locating new fungal names and combinations and associated protologue information is much simpler now than it was before. This makes it easier to incorporate the information into taxonomic studies and to update taxonomic treatments, inventories, and indices. A corollary is that, no matter what publication outlet an author chooses, the name cannot fail to be noticed. The positive experience in mycology makes extension of the registration concept to plants and algae a compelling idea. That experience shows that the best way to make mandatory registration of nomenclatural novelties palatable to botanists and phycologists is the establishment of trial registration at repositories with a history of involvement in and commitment to the indexing of names. Trial registration enables users to acquaint themselves with registration procedures, make suggestions on how they might be improved, and appreciate, by personal experience, the benefits of registration. Unfortunately, the task of establishing such repositories proved to be more complex and time-consuming than had been foreseen. Substantial progress has been made in the establishment of such centres (Barkworth & al., in this issue, pp. 670–672) but the Committee is not in a position to make firm proposals to regulate registration procedures, even less to make registration mandatory from a concrete future date. Nevertheless, the Committee sees it as imperative that the Shenzhen Congress be offered the opportunity to move forward with registration without having to wait six more years. In this spirit, we offer the proposals below. Proposal (276) would declare registration an ongoing concern of the botanical, mycological, and phycological community and provide the basic structure for making it possible. Proposal (277) and Prop. (278) would, in addition, define a flexible framework within which a system of voluntary registration could be developed for various categories of organisms. Proposal (279) would provide for future mandatory registration in a way that does not depend on the six-year intervals between International Botanical Congresses. Presentation of each proposal is followed by a summary of the support received from members of the Committee. Fil: Barkworth, Mary E.. State University of Utah; Estados Unidos Fil: Watson, Mark. Royal Botanic Gardens; Reino Unido Fil: Barrie, Fred R.. Missouri Botanical Garden; Estados Unidos. Field Museum Of Natural History; Estados Unidos Fil: Belyaeva, Irina V.. Royal Botanic Gardens; Reino Unido Fil: Chung, Richard C. K.. Forest Research Institute ; Malasia Fil: Dasková, Jirina. Národní Muzeum; República Checa Fil: Davidse, Gerrit. Missouri Botanical Garden; Estados Unidos Fil: Dönmez, Ali A.. Hacettepe Üniversitesi; Turquía Fil: Doweld, Alexander B.. National Institute Of Carpology; Rusia Fil: Dressler, Stefan. Senckenberg Forschungsinstitut Und Naturmuseum; Alemania Fil: Flann, Christina. Naturalis Biodiversity Center; Países Bajos Fil: Gandhi, Kanchi. Harvard University; Estados Unidos Fil: Geltman, Dmitry. Russian Academy of Science; Rusia Fil: Glen, Hugh F.. Forest Hills; Sudáfrica Fil: Greuter, Werner. Freie Universität Berlin; Alemania Fil: Head, Martin J.. Brock University; Canadá Fil: Jahn, Regine. Freie Universität Berlin; Alemania Fil: Janarthanam, Malapati K.. Goa University; India Fil: Katinas, Liliana. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División de Plantas Vasculares; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Kirk, Paul M.. Royal Botanic Gardens; Reino Unido Fil: Klazenga, Niels. Royal Botanic Gardens Victoria; Australia Fil: Kusber, Wolf-Henning. Freie Universität Berlin; Alemania Fil: Kvacek, Jirí. Národní Muzeum; República Checa Fil: Malécot, Valéry. Universite D'angers; Francia Fil: Mann, David G.. Royal Botanic Gardens; Reino Unido Fil: Marhold, Karol. Charles University; República Checa Fil: Nagamasu, Hidetoshi. Kyoto University; Japón Fil: Nicolson, Nicky. Royal Botanic Gardens; Reino Unido Fil: Paton, Alan. Royal Botanic Gardens; Reino Unido Fil: Patterson, David J.. The University Of Sydney; Australia Fil: Price, Michelle J.. Conservatoire et Jardin botaniques de la Ville de Genève; Suiza Fil: van Reine, Willem F Prud' Homme. Naturalis Biodiversity Center; Países Bajos Fil: Schneider, Craig W.. Trinity College Hartford; Estados Unidos Fil: Sennikov, Alexander. Russian Academy Of Sciences; Rusia Fil: Smith, Gideon F.. Nelson Mandela Metropolitan University; Sudáfrica. Universidad de Coimbra; Portugal Fil: Stevens, Peter F.. Missouri Botanical Garden; Estados Unidos. University of Missouri; Estados Unidos Fil: Yang, Zhu-Liang. Kunming Institute Of Botany Chinese Academy Of Sciences; China Fil: Zhang, Xian-Chun. Chinese Academy of Sciences; República de China Fil: Zuccarello, Giuseppe C.. Victoria University Of Wellington; Nueva Zelanda
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- 2016
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34. Report of the Special Committee on Registration of Algal and Plant Names (including fossils)
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Willem F. Prud'homme van Reine, Xian-Chun Zhang, Hidetoshi Nagamasu, Jiřina Dašková, Jiří Kvaček, Peter F. Stevens, Richard C. K. Chung, Hugh F. Glen, Michelle J. Price, Ali A. Dönmez, Gideon F. Smith, Niels Klazenga, Valéry Malécot, Kanchi N. Gandhi, Liliana Katinas, Wolf-Henning Kusber, Craig W. Schneider, Dmitry V. Geltman, Paul M. Kirk, Alan Paton, Mark F. Watson, Stefan Dressler, Alexander N. Sennikov, Alexander B. Doweld, Zhu-Liang Yang, Irina V. Belyaeva, Fred R. Barrie, David J. Patterson, Nicky Nicolson, Mary E. Barkworth, Werner Greuter, Karol Marhold, Regine Jahn, Martin J. Head, Gerrit Davidse, Malapati K. Janarthanam, David G. Mann, Christina Flann, Giuseppe C. Zuccarello, Intermountain Herbarium, Utah State University (USU), Herbarium, Royal Botanic Garden Edinburgh, Missouri Botanical Garden, Herbarium, Botany Department, Department of Science and Education, Field Museum of Natural History [Chicago, USA], Science Directorate, Herbarium, Royal Botanic Gardens, The Herbarium, Forest Biodiversity Division, Forest Research Institute Malaysia (FRIM), Department of Palaeontology, National Institutes of Health [Bethesda] (NIH)-The Natural History Museum (NHM), Faculty of Science, Department of Botany, University of South Bohemia, Gaertnerian Institution, National Institute of Carpology, Senckenberg Forschungsinstitut und Naturmuseum, Herbarium Senckenbergianum, Naturmuseum, Species 2000, Naturalis Biodiversity Center, Herbaria, Harvard University [Cambridge], Komarov Botanical Institute, Russian Academy of Sciences [Moscow] (RAS), Box 1781, Orto botanico di Palermo, Botanischer Garten und Botanisches Museum Berlin, Free University of Berlin (FU), Department of Earth Sciences [St. Catharines], Brock University [Canada], Department of Botany, Goa University, División Plantas Vasculares [La Plata], Facultad de Ciencias Naturales y Museo [La Plata] (FCNyM), Universidad Nacional de la Plata [Argentine] (UNLP)-Universidad Nacional de la Plata [Argentine] (UNLP), Jodrell Laboratory, Royal Botanic Garden , Kew, Royal Botanic Gardens Victoria, Institut de Recherche en Horticulture et Semences (IRHS), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA)-Université d'Angers (UA), Aquatic Ecosystems, Institut de Recerca i Tecnologia Agroalimentaries, Department of Botany, Faculty of Science, Kasetsart University, Institute of Botany, Universität für Bodenkultur Wien [Vienne, Autriche] (BOKU), The Kyoto University Museum, Kyoto University, Biodiversity Informatics, School of Biological Sciences [Sydney], The University of Sydney, Conservatoire et Jardin Botaniques de Genève, Department of Biology, Trinity College (TCD), Herbarium, Komarov Botanical Institute, the Russian Academy of Sciences [Moscow, Russia] (RAS), Botany Unit, Finnish Museum of Natural History, Finnish Museum of Natural History (LUOMUS), University of Helsinki-University of Helsinki, National University of Ireland [Galway] (NUI Galway), Centre for Functional Ecology, Departamento de Ciências da Vida, University of Coimbra, Northern Arizona University [Flagstaff], Kunming Institute of Botany [CAS] (KIB), Chinese Academy of Sciences [Beijing] (CAS), The National Herbarium, Institute of Botany, Chinese Academy of Sciences [Changchun Branch] (CAS), Missouri Botanical Garden (USA), Université d'Angers (UA)-Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Russian Academy of Sciences, Kunming Institute of Botany, Naturalis Biodiversity Center [Leiden], and AGROCAMPUS OUEST-Institut National de la Recherche Agronomique (INRA)-Université d'Angers (UA)
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0106 biological sciences ,010506 paleontology ,Registration ,[SDV]Life Sciences [q-bio] ,Zoology ,Library science ,Plant Science ,Biology ,010603 evolutionary biology ,01 natural sciences ,Botanical nomenclature ,purl.org/becyt/ford/1 [https] ,registration ,purl.org/becyt/ford/1.6 [https] ,Nomenclature ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences ,Code ,15. Life on land ,International Botanical Congress ,International code ,ddc:580 ,Nomenclature Section ,Mandate ,Plant names registration - Abstract
The Special Committee on Registration of Algal and Plant Names (including fossils) was established at the XVIII International Botanical Congress (IBC) in Melbourne in 2011, its mandate being to consider what would be involved in registering algal and plant names (including fossils), using a procedure analogous to that for fungal names agreed upon in Melbourne and included as Art. 42 in the International Code of Nomenclature for algae, fungi, and plants. Because experience with voluntary registration was key to persuading mycologists of the advantages of mandatory registration, we began by asking institutions with a history of nomenclatural indexing to develop mechanisms that would permit registration. The task proved more difficult than anticipated, but considerable progress has been made, as is described in this report. It also became evident that the Nomenclature Section needs a structure that will allow ongoing discussion of registration and associated issues. Simultaneously with this report we are submitting four proposals that would provide such a structure. Fil: Barkworth, Mary E.. State University of Utah; Estados Unidos Fil: Watson, Mark. Royal Botanic Gardens; Reino Unido Fil: Barrie, Fred R.. Field Museum of National History; Estados Unidos Fil: Belyaeva, Irina V.. Royal Botanic Gardens; Reino Unido Fil: Chung, Richard C. K.. Forest Research Institute Malaysia; Malasia Fil: Dašková, Jiřina. National Museum; República Checa Fil: Davidse, Gerrit. Missouri Botanical Garden; Estados Unidos Fil: Dönmez, Ali A.. Hacettepe Üniversitesi; Turquía Fil: Alexander B. Doweld. National Institute of Carpology; Rusia Fil: Dressler, Stefan. Senckenberg Forschungsinstitut und Naturmuseum; Alemania Fil: Flann, Christina. Naturalis Biodiversity Center; Países Bajos Fil: Gandhi, Kanchi. Harvard University; Estados Unidos Fil: Geltman, Dmitry. Institute of the Russian Academy of Sciences; Rusia Fil: Glen, Hugh F.. Forest Hills; Sudáfrica Fil: Greuter, Werner. Freie Universität Berlin; Alemania Fil: Head, Martin J.. Brock University; Canadá Fil: Jahn, Regine. Freie Universität Berlin; Alemania Fil: Janarthanam, Malapati K.. Goa University; India Fil: Katinas, Liliana. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División de Plantas Vasculares; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Kirk, Paul M.. Royal Botanic Gardens; Reino Unido Fil: Klazenga, Niels. Royal Botanic Gardens; Australia Fil: Kusber, Wolf Henning. Freie Universität Berlin; Alemania Fil: Kvaček, Jiří. National Museum; República Checa Fil: Malécot, Valéry. Université d’Angers; Francia Fil: Mann, David G.. Royal Botanic Gardens; Reino Unido. Institute for Food and Agricultural Research and Technology; España Fil: Marhold, Karol. Charles University; República Checa Fil: Nagamasu, Hidetoshi. Kyoto University; Japón Fil: Nicolson, Nicky. Royal Botanic Gardens; Reino Unido Fil: Paton, Alan. Royal Botanic Gardens; Reino Unido Fil: Patterson, David J.. University of Sydney; Australia Fil: Price, Michelle J.. Conservatoire et Jardin botaniques de la Ville de Genève; Italia Fil: Prud'homme van Reine, Willem F.. Naturalis Biodiversity Center; Países Bajos Fil: Schneider, Craig W.. Trinity College; Estados Unidos Fil: Sennikov, Alexander. University of Helsinski; Finlandia Fil: Smith, Gideon F.. Nelson Mandela Metropolitan University; Sudáfrica Fil: Stevens, Peter F.. Missouri Botanical Garden; Estados Unidos. University of Missouri-St; Estados Unidos Fil: Yang, Zhu-Liang. Chinese Academy of Sciences; República de China Fil: Zhang, Xian-Chun. Chinese Academy of Sciences; República de China Fil: Zuccarello, Giuseppe C.. Victoria University of Wellington; Nueva Zelanda
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- 2016
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35. LC-MS-based metabolomics revealed SLC25A22 as an essential regulator of aspartate-derived amino acids and polyamines in
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Xiaona, Li, Arthur C K, Chung, Shangfu, Li, Lilan, Wu, Jiaying, Xu, Jun, Yu, Chichun, Wong, and Zongwei, Cai
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SLC25A22 ,metabolomics ,digestive system diseases ,Research Paper ,KRAS-mutant colorectal cancer ,LC-MS - Abstract
SLC25A22, which encodes the mitochondrial glutamate transporter, is overexpressed in colorectal cancer (CRC) and is essential for the proliferation of CRC cells harboring KRAS mutations. However, the role of SLC25A22 on metabolic regulation in KRAS-mutant CRC cells has not been comprehensively characterized. We performed non-targeted metabolomics, targeted metabolomics and isotope kinetic analysis of KRAS-mutant DLD1 cells with or without SLC25A22 knockdown using ultra-high-performance liquid chromatography (UHPLC) coupled to Orbitrap mass spectrometry (MS) or tandem MS (MS/MS). Global metabolomics analysis identified 35 altered metabolites, which were attributed to alanine, aspartate and glutamate metabolism, urea cycle and polyamine metabolism. Targeted metabolomics including 24 metabolites revealed that most tricarboxylic acid (TCA) cycle intermediates, aspartate-derived asparagine, alanine and ornithine-derived polyamines were strongly down-regulated in SLC25A22 knockdown cells. Moreover, targeted kinetic isotope analysis showed that most of the 13C-labeled ornithine-derived polyamines were significantly decreased in SLC25A22 knockdown cells and culture medium. Exogenous addition of polyamines could significantly promote cell proliferation in DLD1 cells, highlighting their potential role as oncogenic metabolites that function downstream of SLC25A22-mediated glutamine metabolism. Collectively, SLC25A22 acts as an essential metabolic regulator during CRC progression as it promotes the synthesis of aspartate-derived amino acids and polyamines in KRAS mutant CRC cells.
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- 2017
36. A Study on Applying Guidance Laws in Developing Algorithm which Enables Robot Arm to Trace 3D Coordinates Derived from Brain Signal
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C. K. Chung, Park Sung Woo, Y. W. Lee, H. G. Seo, Y. Kim, Y. J. Kim, H. G. Yeom, J. S. Kim, W. S. Kim, S. Kim, M. S. Bang, and B. M. Oh
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Computer science ,Interface (computing) ,Law ,Arm solution ,Point (geometry) ,Robotic arm ,Algorithm ,Signal ,3d coordinates ,Simulation ,Field (computer science) ,TRACE (psycholinguistics) - Abstract
It is being tried to control robot arm using brain signal in the field of brain-machine interface (BMI). Thisstudy is focused on applying guidance laws for efficient robot arm control using 3D coordinates obtained from Mag-netoencephalography (MEG) signal which represents movement of upper limb. The 3D coordinates obtained frombrain signal is inappropriate to be used directly because of the spatial difference between human upper limb and robotarm’s end-effector. The spatial difference makes the robot arm to be controlled from a third-person point of view withassist of visual feedback. To resolve this inconvenience, guidance laws which are frequently used for tactical ballisticmissile are applied. It could be applied for the users to control robot arm from a first-person point of view whichis expected to be more comfortable. The algorithm which enables robot arm to trace MEG signal is provided in thisstudy. The algorithm is simulated and applied to 6-DOF robot arm for verification. The result was satisfactory anddemonstrated a possibility in decreasing the training period and increasing the rate of success for certain tasks suchas gripping object.Key words: Brain Signal, Brain-Machine Interface (BMI), Robot Arm, Guidance Law
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- 2014
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37. Amorphous Pd layer as a highly effective oxidation barrier for surface finish of electronic terminals
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C. R. Kao, Wei-Liang Shih, C. K. Chung, and C. C. Li
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Auger electron spectroscopy ,Materials science ,General Chemical Engineering ,Metallurgy ,Oxidation resistant ,General Chemistry ,Surface finish ,Corrosion ,Amorphous solid ,X-ray photoelectron spectroscopy ,Chemical engineering ,General Materials Science ,Grain boundary ,Oxidation resistance - Abstract
The oxidation resistance of two important surface finishes, electroless Ni/immersion Au (ENIG) and electroless Ni/electroless Pd/immersion Au (ENEPIG), is studied. Auger electron spectroscopy and X-ray photoelectron spectroscopy analyses show that ENEPIG is more oxidation resistant. The oxidized species of Ni diffuse through the Au grain boundaries. The mechanism for this better performance is that the Pd layer has an amorphous structure. The amorphous Pd layer is able to inhibit the out-diffusion of Ni atoms through high-diffusivity paths.
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- 2014
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38. Volume Shrinkage Induced by Interfacial Reaction in Micro-Ni/Sn/Ni Joints
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C. C. Li, C. R. Kao, C. K. Chung, and Wei-Liang Shih
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Interfacial reaction ,Microstructural evolution ,Void (astronomy) ,Materials science ,Structural material ,Metallurgy ,Metals and Alloys ,Condensed Matter Physics ,Mechanics of Materials ,Metallic materials ,Forensic engineering ,Profilometer ,Composite material ,Internal stress ,Shrinkage - Abstract
Experiments are carried out to measure the volume shrinkage during solid-state reaction in micro-joints for three-dimensional integrated circuit applications. Surface profilometer is employed to measure the volume shrinkage for the reaction between Ni and Sn. The shrinkage is correlated with the microstructural evolution during the reaction. It is found that the volume shrinkage is released through both joint height reduction and void formation. The resulting internal stress and the void formation might post potential reliability issues.
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- 2014
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39. Cubic functional equations on restricted domains of lebesgue measure zero
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Choi, C.-K. Chung, J. Ju, Y. Rassias, J.
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Let X be a real normed space, Y a Banach space, and f f X → Y. We prove the Ulam-Hyers stability theorem for the cubic functional equation f (2x + y) + f (2x - y) - 2 f (x + y) - 2 f (x - y) - 12 f (x) = 0 in restricted domains. As an application we consider a measure zero stability problem of the inequality ∥ f (2x + y) + f (2x - y) - 2 f (x + y) - 2 f (x - y) - 12 f (x) ∥ ≤ ∈ for all (x, y) in Γ R2 of Lebesgue measure 0. © 2016 Canadian Mathematical Society.
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- 2017
40. A Remarkable New Species of Jarandersonia (Malvaceae-Brownlowioideae) from Central Kalimantan, Borneo
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H. S. Tan, R. C. K. Chung, and E. Soepadmo
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Brownlowioideae ,biology ,Plant Science ,biology.organism_classification ,Diplodiscus ,Pentace ,Brownlowia ,Botany ,Genetics ,Taxonomy (biology) ,Endemism ,Clade ,Ecology, Evolution, Behavior and Systematics ,NdhF - Abstract
A new species, Jarandersonia pentaceoides (Malvaceae-Brownlowioideae), endemic to central Kalimantan, Borneo is described and illustrated. Salient morphological features of the new species that can be used to distinguish it from previously known species of the genus (i.e. J. clemensiae, J. parvifolia, J. purseglovei, J. rinoreoides and J. spinulosa) are tabulated. These include: the densely stellate-lepidote and dentate-lepidote edges of tertiary veins and honeycomb-like quaternary veins on the lower leaf surface, the kneed petiole that is swollen at both ends, and the sparsely stellate-lepidote and tufted-hairy seed coat. A key to the species of Jarandersonia is provided, as is a map of its distribution. Keywords—Borneo, endemic, flora, Jarandersonia, Malvaceae-Brownlowioideae, taxonomy. Jarandersonia Kosterm. (Malvaceae-Brownlowioideae) was established as a monotypic genus by Kostermans (1960) based on Jarandersonia paludosa Kosterm. (currently a synonym of Jarandersonia purseglovei (Kosterm.) Kosterm.), an endemic species that occurs in Sarawak, Borneo. Kostermans (1960, 1970) recognized the genus based on the distinctness of its fruit covered with slender spines bearing setose hairs. It com- prises five species distributed in Borneo (Kostermans 1970). Jarandersonia purseglovei and J. spinulosa Kosterm. are endemic to Sarawak, J. rinoreoides Kosterm. is endemic to Sabah, while the other two species J. clemensiae (Burret) Kosterm. is known from Sarawak and Kalimantan, and J. parvifolia Kosterm. occurs in Sarawak, Brunei and Kalimantan. Recent phylogenetic analy- sis of plastid atpB, rbcL and ndhF DNA sequences support the placement of Jarandersonia, together with Brownlowia Roxb., Diplodiscus Turcz. and Pentace Hassk. in the Brownlowioideae clade of Malvaceae s. l. (Judd and Manchester 1997; Alverson et al. 1999; Bayer et al. 1999; Nyffeler and Baum 2000). The author's recent revision of the genus for the Tree Flora of Sabah and Sarawak Project recognized six species of Jarandersonia from Borneo. Of these, J. pentaceoides, endemic to central Kalimantan, is new to science and is here described for the first time as a precursory paper to the publication of the revi- sion for the genus.
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- 2012
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41. REPRODUCTIVE ENDOCRINOLOGY
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Y. Karasu, B. Dilbaz, B. Demir, S. Dilbaz, O. Secilmis Kerimoglu, C. M. Ercan, U. Keskin, C. Korkmaz, N. K. Duru, A. Ergun, I. de Zuniga, M. Horton, A. Oubina, L. Scotti, D. Abramovich, N. Pascuali, M. Tesone, F. Parborell, N. Bouzas, X. H. Yang, S. L. Chen, X. Chen, D. S. Ye, H. Y. Zheng, A. Nyboe Andersen, M. P. Lauritsen, L. L. Thuesen, M. Khodadadi, S. Shivabasavaiah, R. Mozafari, Z. Ansari, O. Hamdine, F. Broekmans, M. J. C. Eijkemans, B. J. Cohlen, A. Verhoeff, P. A. van Dop, R. E. Bernardus, C. B. Lambalk, G. J. E. Oosterhuis, C. Holleboom, G. C. van den Dool-Maasland, H. J. Verburg, P. F. M. van der Heijden, A. Blankhart, B. C. J. M. Fauser, J. S. E. Laven, N. S. Macklon, D. Agudo, C. Lopez, M. Alonso, E. Huguet, F. Bronet, J. A. Garcia-Velasco, A. Requena, M. Gonzalez Comadran, M. A. Checa, M. Duran, F. Fabregues, R. Carreras, A. Ersahin, S. Kahraman, M. Kavrut, B. Gorgen, M. Acet, N. Dokuzeylul, F. Aybar, S. Y. Lim, J. C. Park, J. G. Bae, J. I. Kim, J. H. Rhee, A. Mahran, A. Abdelmeged, A. El-Adawy, M. Eissa, J. Darne, R. W. Shaw, S. A. Amer, A. Dai, G. Yan, Q. He, Y. Hu, H. Sun, H. Ferrero, R. Gomez, C. M. Garcia-Pascual, C. Simon, F. Gaytan, A. Pellicer, C. M. Garcia Pascual, R. C. Zimmermann, T. Madani, L. Mohammadi Yeganeh, S. H. Khodabakhshi, M. R. Akhoond, F. Hasani, C. Monzo, D. Haouzi, S. Assou, H. Dechaud, S. Hamamah, S. Amer, M. Mahran, R. Shaw, V. Lan, G. Nhu, H. Tuong, M. A. Mahmoud Youssef, I. Aboulfoutouh, H. Al-inany, F. Van Der Veen, M. Van Wely, Q. Zhang, T. Fang, S. Wu, L. Zhang, B. Wang, X. Li, L. Ding, A. Day, B. Fulford, J. Boivin, I. Alanbay, M. Sakinci, H. Coksuer, M. Ozturk, S. Tapan, C. K. Chung, Y. Chung, S. Seo, S. Aksoy, K. Yakin, S. Caliskan, Z. Salar, B. Ata, B. Urman, P. Devroey, J. C. Arce, K. Harrison, J. Irving, J. Osborn, M. Harrison, F. Fusi, M. Arnoldi, M. Cappato, E. Galbignani, A. Galimberti, L. Zanga, L. Frigerio, S. A. Taghavi, M. Ashrafi, L. Karimian, M. Mehdizadeh, M. Joghataie, R. Aflatoonian, B. Xu, Y. G. Cui, L. L. Gao, F. Y. Diao, M. Li, X. Q. Liu, J. Y. Liu, F. Jiang, B. C. Jee, G. Yi, J. Y. Kim, C. S. Suh, S. H. Kim, S. Liu, L. B. Cai, J. J. Liu, X. Ma, E. Geenen, R. S. G. M. Bots, J. M. J. Smeenk, E. Chang, W. Lee, H. Seok, Y. Kim, J. Han, T. Yoon, L. Lazaros, N. Xita, K. Zikopoulos, G. Makrydimas, A. Kaponis, N. Sofikitis, T. Stefos, E. Hatzi, I. Georgiou, R. Atilgan, B. Kumbak, L. Sahin, Z. S. Ozkan, M. Simsek, E. Sapmaz, M. Karacan, F. A. Alwaeely, Z. Cebi, M. Berberoglugil, M. Ulug, T. Camlibel, H. Yelke, Z. Kamalak, A. Carlioglu, D. Akdeniz, S. Uysal, I. Inegol Gumus, N. Ozturk Turhan, S. Regan, J. Yovich, J. Stanger, G. Almahbobi, M. Kara, T. Aydin, N. Turktekin, M. Youssef, H. Al-Inany, F. van der Veen, M. van Wely, R. Hart, D. Doherty, H. Frederiksen, J. Keelan, C. Pennell, J. Newnham, N. Skakkebaek, K. Main, H. T. Salem, A. a. Ismail, M. Viola, T. I. Siebert, D. W. Steyn, T. F. Kruger, G. Robin, D. Dewailly, P. Thomas, M. Leroy, C. Lefebvre, B. soudan, P. Pigny, C. Decanter, M. ElPrince, F. Wang, Y. Zhu, H. Huang, F. Valdez Morales, V. Vital Reyes, A. Mendoza Rodriguez, A. Gamboa Dominguez, M. Cerbon, J. Aizpurua, B. Ramos, B. Luehr, I. Moragues, S. Rogel, A. P. Cil, Z. B. Guler, U. Kisa, A. Albu, S. Radian, F. Grigorescu, D. Albu, S. Fica, L. Al Boghdady, M. E. Ghanem, M. Hassan, A. S. Helal, S. Ozdogan, O. Ozdegirmenci, O. Cinar, U. Goktolga, B. Seeber, I. Tsybulyak, B. Bottcher, T. Grubinger, T. Czech, L. Wildt, J. Wojcik, C. M. Howles, B. Destenaves, P. Arriagada, E. Tavmergen, G. Sahin, A. Akdogan, R. Levi, E. N. T. Goker, A. Loft, J. Smitz, L. Ricciardi, C. Di Florio, M. Busacca, D. Gagliano, V. Immediata, L. Selvaggi, D. Romualdi, M. Guido, P. Bouhanna, S. Salama, Z. Kamoud, A. Torre, B. Paillusson, F. Fuchs, M. Bailly, R. Wainer, V. Tagliaferri, C. Tartaglia, E. Cirella, A. Aflatoonian, M. Eftekhar, F. Mohammadian, F. Yousefnejad, S. De Cicco, G. Campagna, R. Depalo, C. Lippolis, M. Vacca, C. Nardelli, A. Cavallini, T. Panic, G. Mitulovic, M. Franz, K. Sator, W. Tschugguel, D. Pietrowski, T. Hildebrandt, S. Cupisti, E. J. Giltay, L. J. Gooren, P. G. Oppelt, J. Hackl, C. Reissmann, C. Schulze, K. Heusinger, M. Attig, I. Hoffmann, M. W. Beckmann, R. Dittrich, A. Mueller, S. Sharma, S. Singh, A. Chakravarty, A. Sarkar, S. Rajani, B. N. Chakravarty, E. Ozturk, S. Isikoglu, S. Kul, T. Hillensjo, H. Witjes, J. Elbers, B. Mannaerts, K. Gordon, K. Krasnopolskaya, A. Galaktionova, O. Gorskaya, D. Kabanova, R. Venturella, M. Morelli, R. Mocciaro, S. Capasso, F. Cappiello, F. Zullo, M. Monterde, A. Marzal, O. Vega, J. M. Rubio-Rubio, C. Diaz-Garcia, E. Kolibianakis, G. Griesinger, C. Yding Andersen, P. Ocal, O. Guralp, B. Aydogan, T. Irez, M. Cetin, H. Senol, N. Erol, L. Rombauts, J. Van Kuijk, J. Montagut, D. Nogueira, G. Porcu, M. Chomier, C. Giorgetti, B. Nicollet, J. Degoy, P. Lehert, C. Alviggi, P. De Rosa, R. Vallone, S. Picarelli, M. Coppola, A. Conforti, I. Strina, C. Di Carlo, G. De Placido, L. Haeberle, O. Demirtas, H. Fatemi, B. S. Shapiro, B. M. Mannaerts, M. N. Chimote, B. N. Mehta, N. N. Chimote, N. M. Nath, N. M. Chimote, S. Karia, M. Bonifacio, M. Bowman, S. McArthur, J. Jung, S. Cho, Y. Choi, B. Lee, K. H. Lee, C. H. Kim, S. K. Kwon, B. M. Kang, K. S. Jung, G. Basios, E. Trakakis, E. Hatziagelaki, V. Vaggopoulos, A. Tsiavou, P. Panagopoulos, C. Chrelias, D. Kassanos, A. Sarhan, A. Elsamanoudy, M. Harira, S. Dogan, G. Bozdag, I. Esinler, M. Polat, and H. Yarali
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Gynecology ,medicine.medical_specialty ,business.industry ,Rehabilitation ,Dietary management ,Obstetrics and Gynecology ,Overweight ,medicine.disease ,Polycystic ovary ,law.invention ,Reproductive Medicine ,Randomized controlled trial ,Weight loss ,law ,Internal medicine ,Meta-analysis ,medicine ,medicine.symptom ,business ,Body mass index ,hirsutism - Abstract
Introduction: Weight loss amongst women with polycystic ovary syndrome (PCOS) is crucial to reduce the risk of endocrine, reproductive and metabolic complications including hirsutism, menstrual disturbances and cardiovascular disease. With approximately 50% of women with PCOS being overweight or obese, effective dietary management of weight in PCOS is essential. However, there is inconsistent evidence as to whether specifically modified diets (e.g. reduced carbohydrate diets) are more effective at achieving weight loss amongst women with PCOS than are conventional healthy hypocaloric diets. Material and Methods: A systematic review and meta-analysis of randomized controlled trials that had compared weight and BMI between women with PCOS who had undergone either a specifically modified diet or a conventional healthy hypocaloric diet were performed. Six electronic databases were searched, a manual search of the reference lists of the included studies was carried out and authors were contacted for additional information. Nine studies with a total of 395 participants (all with a body mass index [BMI] ≥30) were included in the meta-analysis. The effect size used was the mean difference in post-intervention weight and BMI between participants who had undergone a specifically modified diet and participants who had undergone a conventional healthy hypocaloric diet. Results: There were no differences between groups in post-intervention weight (mean difference 1.26, 95% confidence interval (CI) -0.92 to 3.43, p = .26; heterogeneity I2 = 50%, p = .04) or BMI (mean difference 0.15, 95% CI -0.93 to 1.23, p = 0.79; heterogeneity I2 = 44%, p = 0.10). Subgroup analyses according to the presence of a dietary run-in period (a period at the start of the study during which all participants are placed on an identical diet in order to equalize them on variables influenced by diet), intervention duration and type of diet and a sensitivity analysis according to study quality were not significant. Conclusions: Whilst the results should be interpreted in light of the moderate heterogeneity observed, they suggest that specifically modified diets offer no added benefit for weight loss in women with PCOS over conventional healthy hypocaloric diets. The findings of this meta-analysis may promote the unification of guidelines for the dietary management of PCOS and allow clinicians to be confident in prescribing conventional healthy hypocaloric diets for weight loss amongst their PCOS patients.
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- 2012
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42. The orientation relationship between Ni and Cu6Sn5 formed during the soldering reaction
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Tsung-Lin Yang, C. K. Chung, C. R. Kao, and Wan-Jiun Chen
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Orientation (vector space) ,Crystallography ,Materials science ,Mechanics of Materials ,Transmission electron microscopy ,Mechanical Engineering ,Soldering ,Metals and Alloys ,Intermetallic ,General Materials Science ,Condensed Matter Physics ,Electron backscatter diffraction - Abstract
The preferred orientation growth of intermetallic compounds is becoming an increasingly important issue, due to recent advances in three-dimensional integrated circuits. This study reveals that Cu6Sn5 that is formed on Ni does not grow in random orientations, but exhibits a pronounced preferred orientation relationship. This relationship is identified as ( 1 2 ¯ 0 ) ( Cu,Ni ) 6 Sn 5 ( 1 1 ¯ 1 ) Ni and [ 0 0 1 ] ( Cu,Ni ) 6 Sn 5 [ 1 1 0 ] Ni , according to electron backscatter diffraction and high-resolution transmission electron microscopy analysis. One critical implication is that no Ni3Sn4 exists between Cu6Sn5 and Ni because the Cu6Sn5/Ni interface is coherent.
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- 2011
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43. Extra-Germ Cell Expression of Mouse Nuclear Receptor Subfamily 6, Group A, Member 1 (NR6A1)1
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Austin J. Cooney, Zi-Jian Lan, Arthur C.-K. Chung, and Xueping Xu
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endocrine system ,medicine.medical_specialty ,Somatic cell ,Pars intermedia ,Cell Biology ,General Medicine ,Testicle ,Biology ,Growth differentiation factor-9 ,Epididymis ,Cell biology ,medicine.anatomical_structure ,Endocrinology ,Reproductive Medicine ,Internal medicine ,Gene expression ,medicine ,Oviduct ,Germ cell - Abstract
Nuclear receptor subfamily 6, group A, member 1 (NR6A1) is an orphan member of the nuclear receptor superfamily and is required for normal mouse embryonic development. In adult mice, NR6A1 is predominantly expressed in spermatogenic cells and growing oocytes of the gonads and has a role in female reproduction by modulating the transcription of the oocyte-specific genes bone morphogenetic protein 15 (Bmp15) and growth differentiation factor 9 (Gdf9). In our goal to further understand the functional role of NR6A1 during postnatal development, we generated a Nr6a1:beta-galactosidase (LacZ) knockin reporter (Nr6a1(LacZ/+)) mouse line in which the Nr6a1:LacZ fusion gene was expressed and then characterized Nr6a1 expression in these reporter mice by performing LacZ staining. Our RT-PCR analyses showed that Nr6a1 was expressed in a variety of somatic tissues (e.g., oviduct and lung) other than gonads of normal adult mice. In adult Nr6a1(LacZ/+) mice, robust LacZ staining was observed in the gametes of gonads. Strong positive LacZ staining was also observed in the sperm of the epididymis, epithelial cells of the oviduct, and bronchioles within the lung. In adult Nr6a1(LacZ/+) mice, positive LacZ staining was observed in other somatic tissues, including hippocampus, cerebral cortex, cerebellum, and thalamus of brain; pars intermedia and pars anterior of pituitary; parathyroid; and islet of pancreas. NR6A1 expression in sperm within the epididymis, epithelial cells in the oviduct, and bronchioles of the lung was further confirmed by immunohistochemical studies. Nr6a1 is expressed not only in the germ cells of mouse gonads but also in a variety of somatic tissues, including epididymis, oviduct, brain, and pituitary. The extra-germ cell expression of NR6A1 makes it a less attractive contraceptive.
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- 2009
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44. Wood anatomical characteristics of Durio Adans. (malvaceae - helicteroideae: Durioneae)
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I. Nadiah, A. Norazahana, R. C. K. Chung, S. C. Lim, T. Noraini, S. Noorsolihani, and A. S. Nordahlia
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Anatomy study ,Genus ,Botany ,Axial parenchyma ,Durioneae ,Helicteroideae ,Biology ,biology.organism_classification ,Malvaceae - Abstract
A wood anatomy study was carried out on 10 Durio species. Three species, namely D. griffithii, D. grandiflorus and D. excelsus were included, and these species were previously placed in the genus Boschia. Findings have shown presence of prismatic crystals in chambered and non-chambered axial parenchyma in seven Durio species studied, whilst silica was absent. However, in the other three species (D. griffithii, D. grandiflorus and D. excelsus) silica was present, whilst crystal was absent. The presence of this mineral inclusion in these three species was not good taxonomic character at generic level and cannot be used to distinguish Boschia from Durio. Therefore, Durio is suggested to be maintained based on findings in this study. There is no diagnostic wood anatomical characteristic that can be used to differentiate species in Durio. As a conclusion the wood anatomy alone does not aid in delimiting species in Durio.
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- 2016
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45. Orphan Nuclear Receptor LRH-1 Is Required To Maintain Oct4 Expression at the Epiblast Stage of Embryonic Development
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Cristin M. Galardi, Austin J. Cooney, Bryan Goodwin, Steven A. Kliewer, Peili Gu, Beverly H. Koller, Jan A. Gossen, Roger R. Price, David A. Wheeler, Anne M. Latour, Li Peng, Arthur C.-K. Chung, and Xueping Xu
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Cellular differentiation ,Gene Expression ,Down-Regulation ,Embryonic Development ,Receptors, Cytoplasmic and Nuclear ,Biology ,Response Elements ,Mice ,medicine ,Animals ,Inner cell mass ,Gene Silencing ,Blastocyst ,Molecular Biology ,reproductive and urinary physiology ,Regulation of gene expression ,Stem Cells ,Gene Expression Regulation, Developmental ,Cell Differentiation ,Cell Biology ,Embryo, Mammalian ,Embryonic stem cell ,Molecular biology ,Up-Regulation ,DNA-Binding Proteins ,Gastrulation ,medicine.anatomical_structure ,Epiblast ,embryonic structures ,Genes, Lethal ,Stem cell ,Octamer Transcription Factor-3 ,Transcription Factors - Abstract
Oct4 plays an essential role in maintaining the inner cell mass and pluripotence of embryonic stem (ES) cells. The expression of Oct4 is regulated by the proximal enhancer and promoter in the epiblast and by the distal enhancer and promoter at all other stages in the pluripotent cell lineage. Here we report that the orphan nuclear receptor LRH-1, which is expressed in undifferentiated ES cells, can bind to SF-1 response elements in the proximal promoter and proximal enhancer of the Oct4 gene and activate Oct4 reporter gene expression. LRH-1 is colocalized with Oct4 in the inner cell mass and the epiblast of embryos at early developmental stages. Disruption of the LRH-1 gene results in loss of Oct4 expression at the epiblast stage and early embryonic death. Using LRH-1(-/-) ES cells, we also show that LRH-1 is required to maintain Oct4 expression at early differentiation time points. In vitro and in vivo results show that LRH-1 plays an essential role in the maintenance of Oct4 expression in ES cells at the epiblast stage of embryonic development, thereby maintaining pluripotence at this crucial developmental stage prior to segregation of the primordial germ cell lineage at gastrulation.
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- 2005
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46. Oncocytic carcinoma arising in submandibular gland with immunohistochemical observations and review of the literature
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Hiroyasu Noma, K. Matsuzaki, M.-W. Lee, Sadamitsu Hashimoto, Taro Muramatsu, Takashi Inoue, C.-K. Chung, and Masaki Shimono
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Male ,Cancer Research ,Pathology ,medicine.medical_specialty ,Oncocyte ,Adenocarcinoma ,Metastasis ,Cytokeratin ,Fatal Outcome ,Carcinoembryonic antigen ,stomatognathic system ,Carcinoma ,medicine ,Humans ,Neoplasm Invasiveness ,Aged ,Aged, 80 and over ,biology ,business.industry ,medicine.disease ,Submandibular gland ,Neoplasm Proteins ,Submandibular Gland Neoplasms ,medicine.anatomical_structure ,Oncology ,biology.protein ,Immunohistochemistry ,Histopathology ,Oral Surgery ,business ,Follow-Up Studies - Abstract
We report a case of oncocytic carcinoma arising in submandibular gland. The tumour occurred in the left submandibular gland of an 82-year-old Japanese man. Histologically, the tumour was mostly composed of large cells with eosinophilic granules in the cytoplasm and they were arranged in the solid sheets, islands with duct-like structure and cords. The tumour cells had aggressively invaded muscles and perineural tissues, and cervical lymphatic metastasis was frequently observed. Histochemically, the tumour cells were strongly positive for phosphotungstic acid-hematoxylin (PTAH) stain, and we diagnosed this malignant tumour as oncocytic carcinoma. Immunohistochemically, the tumour cells reacted positively for cytokeratin 7, 8, 19, epithelial membrane antigen (EMA), alpha-1-antichymotrypsin and carcinoembryonic antigen (CEA), but negative for cytokeratin 13, 14, smooth muscle actin (HHF35) and S-100 protein (S-100). Tumour was diagnosed as oncocytic carcinoma in submandibular gland. Its characteristics are discussed in term of its histopathological and immunohistochemical features.
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- 2003
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47. A NOTE ON SOME PESTS OF EUCALYPTUS IN SABAH, MALAYSIA
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A Y C K Chung, K Kimjus, M Ajik, R C & Ong, and E B Johnlee
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- 2015
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48. The Embryonic Function of Germ Cell Nuclear Factor Is Dependent on the DNA Binding Domain
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Zi-Jian Lan, Arthur C.-K. Chung, Xueping Xu, Francesco J. DeMayo, and Austin J. Cooney
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Genotype ,Transcription, Genetic ,Somatic cell ,Germ cell nuclear factor ,Genetic Vectors ,Response element ,Mutant ,Receptors, Cytoplasmic and Nuclear ,Repressor ,Biology ,Biochemistry ,Embryonic and Fetal Development ,Mice ,Pregnancy ,Nuclear Receptor Subfamily 6, Group A, Member 1 ,Animals ,Fetal Death ,Molecular Biology ,Germ-Line Mutation ,DNA Primers ,Sequence Deletion ,Yolk Sac ,Mice, Knockout ,Binding Sites ,Base Sequence ,integumentary system ,food and beverages ,Exons ,Cell Biology ,DNA-binding domain ,Embryonic stem cell ,Molecular biology ,Recombinant Proteins ,DNA-Binding Proteins ,Repressor Proteins ,Nuclear receptor ,Female - Abstract
Germ cell nuclear factor (GCNF), an orphan nuclear receptor, is essential for mouse embryogenesis. GCNF specifically binds to a DR0 response element via its DNA binding domain (DBD) in vitro and functions as a repressor of gene transcription. To further study the role of GCNF during embryogenesis, we have employed a Cre/loxP strategy and generated a line of GCNF mutant mice (GCNF(lox/lox)) in which the 243-base pair DBD-encoding exon has been deleted in the germline. However, the ligand binding domain (LBD) of GCNF is still expressed at the mRNA and protein levels in the GCNF(lox/lox) mice. GCNF(lox/lox) mice die at 9.5-10.5 days postcoitum. The tailbuds of these mutant embryos protrude outside the yolk sac. Expression of Oct-4 in the somatic cells of GCNF(lox/lox) embryos at 8.25 days postcoitum was not silenced as in the GCNF(+/+) embryos. Therefore, GCNF(lox/lox) mice phenocopy the GCNF(-/-) mice. Our results indicate that the DBD is essential for the function of GCNF during early mouse embryogenesis, and that the LBD does not mediate any function independent of the DBD at this stage of embryonic development. Our results also suggest that GCNF is indeed a transcriptional factor that represses gene transcription mediated via its DBD.
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- 2002
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49. Characterization of crab EcR and RXR homologs and expression during limb regeneration and oocyte maturation
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David S. Durica, Xiaohui Wu, Arthur C.-K. Chung, Penny M. Hopkins, and Gopinathan Anilkumar
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Gene isoform ,Receptors, Steroid ,Invertebrate Hormones ,Brachyura ,Receptors, Retinoic Acid ,Recombinant Fusion Proteins ,Molecular Sequence Data ,Biology ,Biochemistry ,chemistry.chemical_compound ,Limb bud ,Endocrinology ,Genes, Reporter ,Transcription (biology) ,Complementary DNA ,Animals ,Regeneration ,Amino Acid Sequence ,Molecular Biology ,Gene ,Gene Library ,Ecdysteroid ,Nuclear Proteins ,RNA ,Extremities ,Molecular biology ,DNA-Binding Proteins ,Retinoid X Receptors ,chemistry ,RNA splicing ,Oocytes ,Insect Proteins ,Sequence Alignment ,Transcription Factors - Abstract
We report here complete coding sequences for the Uca pugilator homologs of the ecdysteroid (UpEcR) and retinoid-X receptors (UpRXR). Library screenings recovered cDNA clones containing a unique amino terminal open-reading frame (A/B domain) for each gene, most similar to insect B1 EcR and USP1/RXR isoforms. Splicing variants in the UpRXR ligand-binding domain were also identified, in a region critical for folding of Drosophila and lepidopteran USP. UpEcR and UpRXR proteins were able to associate, and both are required for binding to an ecdysteroid HRE; these interactions were not hormone-dependent. Ribonuclease protection assays (RPA) were conducted using A/B domain and ‘common’ (C or E) domain probes on RNA isolated from various stages of regenerating limb buds and ovaries. For several of the limb bud and ovarian stages examined, the relative level of A/B domain sequence protected was significantly less than common domain suggesting alternative amino terminal isoforms other than those isolated through cloning. This is the first report of UpEcR and UpRXR transcription during ovarian maturation, implicating the ovary as a potential target for hormonal control in Crustacea.
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- 2002
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50. [Untitled]
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Lester A. H. Critchley, Ye Zhang, Julian A.J.H. Critchley, and Raymond C. K. Chung
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Cardiac output ,medicine.diagnostic_test ,Health Informatics ,Liter ,CUSUM ,Stroke volume ,Critical Care and Intensive Care Medicine ,Cardiographs ,Impedance cardiography ,Head up tilting ,Trend analysis ,Anesthesiology and Pain Medicine ,Statistics ,medicine ,Mathematics - Abstract
Objectives.To compare the performances of two impedancecardiographs, the RheoCardioMonitor (RCM) and the BoMed NCCOM3, usingtrend analysis. This involved a series of head-up tilts, a simulation ofthe stroke volume (SV) and cardiac output (CO) response, calculation ofprediction errors and cumulative sums (Cusum). Methods.Eighthealthy male volunteers, aged 27–37 years, were tilted on fouroccasions to angles of 55°, 15°, 30° and 55°, whilstrecording SV and CO every 10-sec. Baseline and percentage changes withtilting were calculated. A simulation of the tilt response wasconstructed, and from this residuals (observed-predicted) and predictionerrors ((observed-predicted)/predicted) ×100% werecalculated at 10-sec intervals. Trend analysis was performed by multipleanalysis of the variance of serial measurements and graphicallyassessing changes in serial SV prediction errors, using Cusums. Resultsare presented as mean (range or SD). Results.Baseline values forRCM-SV were 76 (35–94) ml and for CO 4.7 (2.8–6.1)litre· min−1. For BoMed-SV they were 113(90–164) ml and for CO 7.2 (5.5–11.9) litre·min−1. Head-up tilting to 55° resulted in a 32(12)% decrease in RCM-SV and a 21 (11)% decrease inBoMed-SV (p< 0.01). Prediction errors for RCM-SV were (6.5(4.9)%) and for BoMed-SV (6.8 (5.2)%) (p=0.048). Cusum analysis showed that in 84% of tests, impedancemeasurements remained within ± 10% of the initialcalibration. There was no difference between devices (χ 2= 0.92). Conclusions.Simulation of a physiological response,such as that to head-up tilting, and using a trend analysis based onprediction errors and Cusum, is a useful technique. The trendingabilities of the RCM and BoMed were similar.
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- 2002
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