258 results on '"Chen FR"'
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2. Working Papers in Educational Linguistics, Volume 9, Number 1, Spring 1993.
- Author
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Pennsylvania Univ., Philadelphia. Graduate School of Education., Chen, Fr, Chen, Fr, and Pennsylvania Univ., Philadelphia. Graduate School of Education.
- Abstract
This issue of a journal designed to serve as a forum for the exchange of ideas among students and scholars on various aspects of linguistics in education contains the following papers: "The Importance of Participant Role in Cooperative Learning" (Rebecca Freeman); "The Trap of Generalization: A Case of Encountering a New Culture" (Masakazu Iino); "'Sticking Points': Effects of Instruction on NNS Refusal Strategies" (Kendall A. King, Rita Elaine Silver); "Planning Language-in-Education in Arkansas: A Case Study" (Felicia Lincoln-Porter); "Foreign Language Teaching at the University of Pennsylvania: A Language Planning Case Study" (Kristin I. Loheyde); and "Story, Voice, and Culture: The Politics of Narrative in Multicultural Education" (Cathy Luna). (MSE)
- Published
- 1993
3. Working Papers in Educational Linguistics (WPEL), Fall 1992.
- Author
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Pennsylvania Univ., Philadelphia. Graduate School of Education. and Chen, Fr
- Abstract
Papers in this volume include the following: "Addressing Contextual Issues Relevant to Language Teaching in South Africa": Implications for Policy and Practice" (J. Keith Chick); "A Comparative Study of Compliment Responses: Korean Females in Korean Interactions and in English Interactions" (Chung-hye Han); "Can You Apologize Me? An Investigation of Speech Act Performance Among Non-Native Speakers of English" (Julian Linnell et al.); "Acquisition Policy Planning and Litigation: Language Planning in the Context of 'Y.S. v. School District of Philadelphia'" (Ellen E. Skilton); "'The Proper Way to Pray': Description of a Korean-American Youth Service Prayer" (Holly Stone); and "The Compelling Influence of Nonlinguistic Aims in Language Status Policy Planning in Puerto Rico" (Helen M. Strauch). (JL)
- Published
- 1992
4. CONSTITUTIONAL AMENDMENTS: COMPARATIVE (RE)VIEW IN CONTEMPORARY CONSTITUTIONALISM
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Ірина Софінська and Chen Friedberg
- Subjects
constitutional amendment ,'eternity' clauses ,unamendable constitutional provisions ,constitutional referendum ,Public law ,K3150 ,Criminal law and procedure ,K5000-5582 ,Private international law. Conflict of laws ,K7000-7720 - Abstract
This article subsequently sheds light on existing political, legal, and legislative constitutional amending patterns in selected European countries. It primarily focuses on the (un)successful tools, mechanisms, and procedures for amending the Constitution (initiative, drafting, adoption, and implementation of high-stakes political, legal, and legislative decisions by Parliament and approval by the national referendum on constitutional amendments). We follow a thematic and methodological framework based on theoretical exploration and conceptualization of 'eternal' clauses (unamendable constitutional provisions). The article also provides a thorough analysis of differences in the constitutional amendment procedure in selected countries (Italy, Poland, and Ukraine) during a declared 'state of emergency' or other extraordinary regimes. Furthermore, it examines the outcomes of constitutional referendums aimed at modifying or altering the Constitution. This research aims to investigate whether the process of constitutional amendment (modification, alteration, abolishment, or supplement) depends on the form of government of a particular country. Or does it depend on the level of entrenchment of its Constitution? Is it simply an actual (successful) mechanism and a faultless primary political tool used by the pro-government ruling majority (or sometimes the parliamentary opposition) to 'win a game' or to be a real game-changer following the demand of citizenry? Properly conducted constitutional amendments can provide room for public and institutional debate, contribute to the Constitution's legitimacy, and develop and consolidate democratic constitutional traditions over time. This can be achieved by ensuring that the instruments, rules, mechanisms, and procedures on constitutional change (alteration, modification, abolishment) are open to interpretation and controversy. On the contrary, if applied in a rush or without proper democracy-based discourse (and civic society support), this may undermine in-country political stability and, eventually, the Constitution's legitimacy. It is probable that the end of the war in Ukraine, ongoing since 2014, and the full-scale invasion by Russia on February 24, 2022, will lead to a paradigm shift in constitutionalism. New constitutions may be adopted or existing ones revised to reflect the post-war world order, core values, and the level of development of the state and society where the rule of law prevails.
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- 2024
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5. Effects of Guanxinkang on expressions of ATP-sensitive potassium channel subunits Kir6.1, Kir6.2, SUR2A and SUR2B in ischemic myocytes of rats
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Chen, FR, primary
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- 2010
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6. ALUMINUM COORDINATION AND LEWIS ACIDITY IN ALUMINAS AND STEAMED ZEOLITES
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Yong, H., Coster, D., Chen, Fr, Davis, Jg, Fripiat, Jj, Morterra, C., Alexey Tsyganenko, Coluccia, S., Datye, Ar, Hettinger, Wp, and Nagy, Jb
7. Comparison of cardiothoracic surgery training in usa and germany
- Author
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Chen Frederick Y, Bolman R, Rajab Taufiek K, Mokashi Suyog A, Tchantchaleishvili Vakhtang, and Schmitto Jan D
- Subjects
Surgery ,RD1-811 ,Anesthesiology ,RD78.3-87.3 - Abstract
Abstract Background Training of cardiothoracic surgeons in Europe and the United States has expanded to incorporate new operative techniques and requirements. The purpose of this study was to compare the current structure of training programs in the United States and Germany. Methods We thoroughly reviewed the existing literature with particular focus on the curriculum, salary, board certification and quality of life for cardiothoracic trainees. Results The United States of America and the Federal Republic of Germany each have different cardiothoracic surgery training programs with specific strengths and weaknesses which are compared and presented in this publication. Conclusions The future of cardiothoracic surgery training will become affected by technological, demographic, economic and supply factors. Given current trends in training programs, creating an efficient training system would allow trainees to compete and grow in this constantly changing environment.
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- 2010
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8. Polyvictimization and academic performance among college students: Examining differences across sexual and gender identity.
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Hancock KP, Daigle LE, Nelloms S, and Chen FR
- Abstract
Objective: The current study examines the relationship between polyvictimization and academic performance in college across gender and sexual identity. Participants: Participants were from the Spring 2019 administration of the American College Health Association's National College Health Assessment-II. Methods: Multinomial logistic regression models and negative binomial regression models with and without interaction terms were used to explore if gender and sexual identity are related to academic performance, and if they are differentially related to academic performance when experiencing polyvictimization. Results: The effects of polyvictimization on academic performance are largely similar across all groups, but those identifying as trans/non-binary + and those identifying as a sexual minority had the greatest probability of experiencing academic performance issues. When the effects are different, they show a stronger association for students who are heterosexual and students who are cisgender. Conclusions: These similarities suggest that a need exists to target all students at risk for polyvictimization for intervention efforts.
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- 2024
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9. Effect of smoking behaviour and related blood DNA methylation on visceral adipose tissues.
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Song ZQ, Chen YQ, Xuan CH, Ni TT, Xu YP, Lu XY, Chen FR, and Chen YH
- Abstract
Background: Recent studies have found that tobacco smoking is associated with fat distribution, yet limited research has focused on its relationship with visceral adipose tissues (VATs). Furthermore, the cellular and molecular mechanisms underlying the interactions among smoking, epigenetic modifications, and VATs remain unknown., Method: We performed univariable Mendelian randomization (MR) analysis to elucidate the causal relationship between smoking behaviours and VATs, including epicardial and pericardial adipose tissue (EPAT), liver fat (LF), and pancreas fat (PF). This approach could minimize the impact of confounders and reverse causality through utilizing genetic variants to proxy the smoking behaviours. Mediation MR analysis were conducted to detect potential mediators. Additionally, summary-data-based MR (SMR) and colocalization analysis were performed to explore the association between smoking-related DNA methylation and VATs., Results: We identified a convincing association between smoking initiation and increased EPAT (beta: 0.15, 95% CI: 0.06, 0.23, p = 7.01 × 10
-4 ) and LF area (beta: 0.15, 95% CI = 0.05, 0.24, p = 2.85 × 10-3 ), respectively. Further mediation analysis suggested type 2 diabetes mellitus (T2DM) as a potential mediator within these co-relationships. When further exploring the associations between the smoking related DNA methylation and VATs, we identified that WT1 methylation at cg05222924 was significantly linked to a lower EPAT area (beta: -0.12, 95% CI: -0.16, -0.06, PFDR = 2.24 × 10-3 ), while GPX1 methylation at cg18642234 facilitated the deposition of EPAT (beta: 0.15, 95% CI: 0.10, 0.20, PFDR = 1.66 × 10-4 )., Conclusion: Our study uncovered a significant causal effect between smoking and VATs, with T2DM identified as a potential mediator. Further investigation into DNA methylation yielded novel insights into the pathogenic role of smoking on EPAT., (© 2024 John Wiley & Sons Ltd.)- Published
- 2024
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10. Callous-unemotional traits and pre-ejection period in response to reward.
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Chen FR, Nowak MK, and French KM
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- Humans, Male, Adult, Young Adult, Emotions physiology, Heart Rate physiology, Antisocial Personality Disorder physiopathology, Adolescent, Empathy physiology, Habituation, Psychophysiologic physiology, Cardiography, Impedance, Reward, Electrocardiography
- Abstract
Callous-unemotional (CU) traits have important utility in distinguishing individuals exhibiting more severe and persistent antisocial behavior, and our understanding of reward processing and CU traits contributes to behavioral modification. However, research on CU traits often investigated reward alongside punishment and examined solely on average reward reactivity, neglecting the reward response pattern over time such as habituation. This study assessed individuals' pre-ejection period (PEP), a sympathetic nervous system cardiac-linked biomarker with specificity to reward, during a simple reward task to investigate the association between CU traits and both average reward reactivity and reward response pattern over time (captured as responding trajectory). A heterogeneous sample of 126 adult males was recruited from a major metropolitan area in the US. Participants reported their CU traits using the Inventory of Callous-Unemotional Traits and completed a simple reward task while impedance cardiography and electrocardiogram were recorded to derive PEP. The results revealed no significant association between average PEP reward reactivity and CU traits. However, CU traits predicted both linear and quadratic slopes of the PEP reactivity trajectory: individuals with higher CU traits had slower habituation initially, followed by a rapid habituation in later blocks. Findings highlight the importance of modeling the trajectory of PEP reward response when studying CU traits. We discussed the implications of individuals with high CU traits having the responding pattern of slower initial habituation followed by rapid habituation to reward and the possible mechanisms., (© 2024 Society for Psychophysiological Research.)
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- 2024
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11. Kinematic Modeling of Pitch Velocity in High School and Professional Baseball Pitchers: Comparisons With the Literature.
- Author
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Manzi JE, Dowling B, Wang Z, Sudah SY, Moran J, Chen FR, Estrada JA, Nicholson A, Ciccotti MC, Ruzbarsky JJ, and Dines JS
- Abstract
Background: Kinematic parameters predictive of pitch velocity have been evaluated in adolescent and collegiate baseball pitchers; however, they have not been established for high school or professional pitchers., Purpose: To create multiregression models using anthropometric and kinematics features most predictive for pitch velocity in high school and professional pitchers and compare them with prior multiregression models evaluating other playing levels., Study Design: Descriptive laboratory study., Methods: High school (n = 59) and professional (n = 337) baseball pitchers threw 8 to 12 fastballs while being evaluated with 3-dimensional motion capture (480 Hz). Using anthropometric and kinematic variables, multiregression models for pitch velocity were created for each group. A systematic review was conducted to determine previous studies that established kinematic models for ball velocity in youth, high school, and collegiate pitchers., Results: Leg length was predictive of pitch velocity for high school and professional pitchers ( P < .001 for both). When compared with previously established models for pitch velocity, almost all groups were distinct from one another when assessing age ( P
maximum < .001), weight ( Pmax = .0095), and pitch velocity ( Pmax < .001). Stride length was a significant predictor for the youth/high school pitchers, as well as the current study's high school and professional pitchers ( P < .001 for all). Maximal shoulder external rotation (collegiate: P = .001; professional: P < .001) and maximal elbow extension velocity (high school/collegiate: P = .024; collegiate: P < .001; professional: P = .006) were shared predictors for the collegiate and current study's professional group multiregression models. Trunk flexion at ball release was a commonly shared predictor in the youth/high school ( P = .04), high school/collegiate ( P = .003), collegiate ( P < .001), and the current study's professional group ( P < .001)., Conclusion: Youth, high school, collegiate, and professional pitchers had unique, predictive kinematic and anthropometric features predictive of pitch velocity. Leg length, stride length, trunk flexion at ball release, and maximal shoulder external rotation were predictive features that were shared between playing levels., Clinical Relevance: Coaches, clinicians, scouts, and pitchers can consider both the unique and the shared predictive features at each playing level when attempting to maximize pitch velocity., Competing Interests: One or more of the authors has declared the following potential conflict of interest or source of funding: A.N. has received grant support from Arthrex, education payments from Arthrex and SeaPearl, and hospitality payments from Zimmer Biomet and Stryker. M.C.C. has received grant support from Arthrex and DJO. J.J.R. has received grant support from Arthrex and hospitality payments from Smith+Nephew. J.S.D. has received education payments from Gotham Surgical; consulting fees from Arthrex, KCI, and Trice Medical; nonconsulting fees from Arthrex; and royalties from Arthrex and Linvatec. AOSSM checks author disclosures against the Open Payments Database (OPD). AOSSM has not conducted an independent investigation on the OPD and disclaims any liability or responsibility relating thereto., (© The Author(s) 2024.)- Published
- 2024
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12. Correlations of chemical weathering indicators with major chemical constituents in sediments to obtain palaeoclimate information from Chaohu Lake, China.
- Author
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Huang M, Liu YN, Chen FR, Tao Y, and Sun YM
- Abstract
The main chemical compositions of 201 surface sediments and 53 deep sediment samples from Chaohu Lake, China, were analysed. Since the surface sediments (0-2 cm depth) in Chaohu Lake are modern sediments, this paper mainly focuses on the deep sediments (50-100 cm depth) in Chaohu Lake. Particle size analysis and magnetization determination of the CH3 and CH4 column sediment samples were carried out. The age determination data of the CH-1 column sediment samples are reported. A systematic study of the rocks and their chemical compositional characteristics in the Chaohu Lake Basin was also carried out. The results of this study show that four positive chemical weathering indicators and one negative chemical weathering indicator are applicable to the study of Chaohu Lake. The mean CIA of the Chaohu Lake sediments was less than 65, indicating that the Chaohu Lake Basin experienced weak chemical weathering and that the palaeoclimate was cold and dry. Vertical variations in the mean grain size and magnetization in the CH3 and CH4 columnar sediments reflect changes in the depositional environment and climate during deposition of the Chaohu Lake sediments. The age data from the CH-1 column sediment samples directly indicate deposition of the deep sediments in Chaohu Lake during the Little Ice Age in eastern China (AD 1380-1880). The Th/U, Sc/Th, Rb/Sr, Na
2 O/K2 O, CaO/MgO and OC/N ratios of the Chaohu sediments reflect palaeoclimate characteristics and the chemical compositions of the source rocks in the Chaohu Lake basin. The correlations of the CIA, CIW, PIA, and CIX with the chemical compositional ratios provide information on the palaeoclimate and the distribution of the chemical compositions. The CIA, CIW, PIA, and CIX were not correlated with Cd, Pb, As, Hg, or P. In contrast, the CIA, CIW, PIA, and CIX were significantly positively correlated with Cr and N. The WIP was inconsistently correlated with the selected chemical components. Therefore, the study of the correlations of chemical weathering indicators with four heavy metals and two eutrophication-related elements is of little significance. The study of the chemical weathering characteristics of deep sediments of inland lakes should be combined with assessment of the geological characteristics of the lake basins, particularly the analysis of the chemical composition of the rocks in the lake basins., (© 2024. The Author(s).)- Published
- 2024
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13. The reciprocal relationships between moral disengagement and antisocial behavior from ages 16 to 23.
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Chen FR and Sutton AL
- Abstract
Moral disengagement (MD) has been consistently associated with antisocial behavior (ASB) in prior research. Limited research tested the directionality of the bivariate relationship, and most studies focused only on the direction of MD predicting ASB, even though ASB could also influence MD based on the literature on attribution and behavioral influence on attitude. Moreover, the few studies testing reciprocal associations rarely controlled for stable individual differences and did not explicitly examine the age effect to allow for a clear developmental inference. We analyzed age-based self-report antisocial behavior and moral disengagement data across ages 16-23 from 1,349 juvenile offenders (86.43% male; 20.31% White, 41.29% Black, 33.65% Hispanic) in the Pathways to Desistance Project using a random intercept cross-lagged panel model. Controlling for stable individual differences in MD and ASB and their associations along with the autoregressive effects, there was a reciprocal relationship between MD and ASB from ages 16 to 18. However, from ages 19 to 21, only ASB significantly predicted MD in the following year. There was no significant cross-lagged effect from ages 21 to 23. Our findings highlight the dynamic relationship between MD and ASB from ages 16 to 23. Youth between 16 and 18 years old may be more pliable to change with treatment/intervention due to the two-way traffic of cognition and behavior, but we also caution against treatment efforts with a heavy focus on proactive criminal thinking involving moral disengagement to reduce offending behavior beyond age 18. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
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- 2024
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14. Unique and interactive effects of threat and deprivation on latent trait cortisol among emerging adults.
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Stroud CB, Chen FR, Navarro E, Gim H, Benjamin I, and Doane LD
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- Humans, Female, Male, Young Adult, Adult, Adolescent, Pituitary-Adrenal System metabolism, Pituitary-Adrenal System physiopathology, Stress, Psychological metabolism, Stress, Psychological physiopathology, Adverse Childhood Experiences, Psychosocial Deprivation, Hydrocortisone metabolism, Saliva metabolism, Saliva chemistry, Hypothalamo-Hypophyseal System metabolism, Hypothalamo-Hypophyseal System physiopathology
- Abstract
Though considerable work supports the Dimensional Model of Adversity and Psychopathology, prior research has not tested whether the dimensions-threat (e.g., abuse) and deprivation (e.g., neglect)-are uniquely related to salivary trait indicators of hypothalamic pituitary adrenal (HPA) axis activity. We examined the unique and interactive effects of threat and deprivation on latent trait cortisol (LTC)-and whether these effects were modified by co-occurring adversities. Emerging adults (n = 90; M
age = 19.36 years; 99.88% cisgender women) provided salivary cortisol samples four times a day (waking, 30 min and 45 min postwaking, bedtime) over three 3-day measurement waves over 13 weeks. Contextual life stress interviews assessed early adversity. Though the effects varied according to the conceptualization of early adversity, overall, threat-but not deprivation, nor other co-occurring adversities-was uniquely associated with the across-wave LTC. Specifically, the incidence and frequency of threat were each negatively related to the across-wave LTC. Threat severity was also associated with the across-wave LTC, but only among those with no deprivation. Finally, the effects of threat were modified by other co-occurring adversities. Findings suggest that threat has unique implications for individual differences in HPA axis activity among emerging adults, and that co-occurring adversities modify such effects., (© 2024 Wiley Periodicals LLC.)- Published
- 2024
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15. Tuning the Liquid Crystallinity and Electroluminescence via Sulfonation of S-Annulated Perylene Tetraester.
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Behera PK, Chen FR, Gautam P, Roy M, Rao DSS, Yelamaggad CV, Jou JH, and Sudhakar AA
- Abstract
This study presents a comparative analysis of S-annulated perylene tetraester (PTE-S) and its sulfone (PTE-SO
2 ) analogue. This sulfone modification reduced melting point and stabilized a room temperature columnar rectangular (Colr ) phase in contrast to its parent PTE-S which showed a crystalline behaviour at room temperature. This molecular design also leads to red-shifted absorbance and emission in comparison to PTE-S, along with a tuning of photoluminescence from sky blue to green, achieving an impressive quantum yield of 85 %. OLED devices fabricated using PTE-SO2 as emitter material at concentrations of 0.2, 0.5, and 1 wt.% in CBP as host material. A maximum external quantum efficiency (EQE) of 2.9 % was observed with the 0.5 wt.% PTE-SO2 in CBP with CIE coordinates of (0.45, 0.35), accompanied by an orange luminance of 848 cd/m2 . Notably, a device with a 0.5 wt% doping concentration of PTE-S demonstrates an EQE of 3.5 %, and cyan luminance of 2,598 cd/m2 ., (© 2024 Wiley‐VCH GmbH.)- Published
- 2024
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16. Self-assembled molecular network with waterwheel-like architecture: experimental and theoretical evaluation toward electron transport capabilities for optoelectronic devices.
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Kumar K, Karmakar A, Thakur D, Sharma D, Chen FR, Verma V, Nagar MR, Jou JH, Banik S, and Ghosh S
- Abstract
In recent times, self-assembled electron transport materials for optoelectronic devices, both solar cells and organic light-emitting diodes (OLEDs), have been gaining much interest as they help in fabricating high-efficiency devices. However, designing organic small molecular materials with star-shaped self-assembled networks is a challenge. To achieve this sort of target, we chose triazine and benzene-1,3,5-tricarbonyl cores for developing such architecture, and we developed four molecular systems, viz TCpCN, TCmCN, TmCN, and TpCN. Successful isolation of single crystals followed by structural analysis of TmCN revealed interesting molecular arrangements in the solid state resulting in the formation of a waterwheel type architecture with an extended network bearing characteristic voids. Theoretical calculations was carried out to check their electron transportability. The natural transition orbital calculation helped in understanding the locally excited and charge transfer excited states. The low electron reorganization energies of these molecules indicated that these materials may have potential to be used in electron transport layers of optoelectronic devices, particularly in OLEDs. Moreover, the assembled networks have a relatively wide surface area and linked structures, which are advantageous for the conduction of carriers with poor electron recombination inside the ETL, and these may offer a straightforward channel for electron conduction to the emissive layer. Finally, the fabricated electron-only device indicated that the synthesized materials may be used as ETMs in the electron transport layer of optoelectronic devices.
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- 2024
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17. Flash healing of laser-induced graphene.
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Cheng L, Yeung CS, Huang L, Ye G, Yan J, Li W, Yiu C, Chen FR, Shen H, Tang BZ, Ren Y, Yu X, and Ye R
- Abstract
The advancement of laser-induced graphene (LIG) technology has streamlined the fabrications of flexible graphene devices. However, the ultrafast kinetics triggered by laser irradiation generates intrinsic amorphous characteristics, leading to high resistivity and compromised performance in electronic devices. Healing graphene defects in specific patterns is technologically challenging by conventional methods. Herein, we report the rapid rectification of LIG's topological defects by flash Joule heating in milliseconds (referred to as F-LIG), whilst preserving its overall structure and porosity. The F-LIG exhibits a decreased I
D /IG ratio from 0.84 - 0.33 and increased crystalline domain from Raman analysis, coupled with a 5-fold surge in conductivity. Pair distribution function and atomic-resolution imaging delineate a broader-range order of F-LIG with a shorter C-C bond of 1.425 Å. The improved crystallinity and conductivity of F-LIG with excellent flexibility enables its utilization in high-performance soft electronics and low-voltage disinfections. Notably, our F-LIG/polydimethylsiloxane strain sensor exhibits a gauge factor of 129.3 within 10% strain, which outperforms pristine LIG by 800%, showcasing significant potential for human-machine interfaces., (© 2024. The Author(s).)- Published
- 2024
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18. Immune-stealth VP28-conjugated heparin nanoparticles for enhanced and reversible anticoagulation.
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Hussein HR, Chang CY, Zheng Y, Yang CY, Li LH, Lee YT, Chen JY, Liang YC, Lin CJ, Chang YC, Geo HN, Noor SM, Kiew LV, Chen FR, and Chang CC
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- Animals, Mice, Anticoagulants pharmacology, Blood Coagulation, Platelet Count, Heparin pharmacology, Heparin therapeutic use, Thrombocytopenia drug therapy
- Abstract
Heparins are a family of sulfated linear negatively charged polysaccharides that have been widely used for their anticoagulant, antithrombotic, antitumor, anti-inflammatory, and antiviral properties. Additionally, it has been used for acute cerebral infarction relief as well as other pharmacological actions. However, heparin's self-aggregated macrocomplex may reduce blood circulation time and induce life-threatening thrombocytopenia (HIT) complicating the use of heparins. Nonetheless, the conjugation of heparin to immuno-stealth biomolecules may overcome these obstacles. An immunostealth recombinant viral capsid protein (VP28) was expressed and conjugated with heparin to form a novel nanoparticle (VP28-heparin). VP28-heparin was characterized and tested to determine its immunogenicity, anticoagulation properties, effects on total platelet count, and risk of inducing HIT in animal models. The synthesized VP28-heparin trimeric nanoparticle was non-immunogenic, possessed an average hydrodynamic size (8.81 ± 0.58 nm) optimal for the evasion renal filtration and reticuloendothelial system uptake (hence prolonging circulating half-life). Additionally, VP28-heparin did not induce mouse death or reduce blood platelet count when administered at a high dose in vivo (hence reducing HIT risks). The VP28-heparin nanoparticle also exhibited superior anticoagulation properties (2.2× higher prothrombin time) and comparable activated partial thromboplastin time, but longer anticoagulation period when compared to unfractionated heparin. The anticoagulative effects of the VP28-heparin can also be reversed using protamine sulfate. Thus, VP28-heparin may be an effective and safe heparin derivative for therapeutic use., (© 2024 IOP Publishing Ltd.)
- Published
- 2024
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19. PEP reward reactivity moderates the effects of RSA reactivity on antisocial behavior and substance use.
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Chen FR and French K
- Subjects
- Adult, Humans, Male, Antisocial Personality Disorder, Autonomic Nervous System, Parasympathetic Nervous System physiology, Reward, Heart Rate physiology, Respiratory Sinus Arrhythmia physiology, Substance-Related Disorders
- Abstract
Integrating Polyvagal Theory and Reinforcement Sensitivity Theory (RST), we examined pre-ejection period (PEP) reward reactivity, which was suggested to index trait impulsivity, as a moderator between respiratory sinus arrhythmia (RSA) reactivity and antisocial behavior (ASB), and substance use in an urban male, adult sample. To understand the inconsistent findings between RSA reactivity and externalizing problems, we proposed to study both negatively and positively valenced tasks for RSA reactivity and to include PEP reward reactivity as a moderator for the RSA-behavior link. Data were collected from an urban sample of 131 male adults (active offenders, demographic controls, and college students). ICG (impedance cardiography) and ECG (electrocardiogram) were recorded, computing PEP (sympathetic nervous system activity marker) and RSA (parasympathetic nervous system activity marker), while participants completed the modified Trier Social Stress Test and a simple reward task. Reactivity was calculated by subtracting the baseline from the task activity. Consistent with prior studies, more RSA withdrawal to stress and less PEP shortening to reward predicted the most ASB and substance use. Less RSA withdrawal to reward and more PEP shortening to reward predicted the most ASB and substance use. We incorporated autonomic space, RST, and Polyvagal Theory to discuss our findings, and specifically highlight how clarifying what each reactivity captures based on the task demand (e.g., presence of social threat, need for vagal-mediated social affiliative behavior) can illuminate our understanding of the result patterns., (© 2023 Society for Psychophysiological Research.)
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- 2024
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20. Pitch-classifier model for professional pitchers utilizing 3D motion capture and machine learning algorithms.
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Manzi JE, Dowling B, Krichevsky S, Roberts NLS, Sudah SY, Moran J, Chen FR, Quan T, Morse KW, and Dines JS
- Abstract
Introduction: A pitcher's ability to achieve pitch location precision after a complex series of motions is of paramount importance. Kinematics have been used in analyzing performance benefits like ball velocity, as well as injury risk profile; however, prior utilization of such data for pitch location metrics is limited., Objective: To develop a pitch classifier model utilizing machine learning algorithms to explore the potential relationships between kinematic variables and a pitcher's ability to throw a strike or ball., Methods: This was a descriptive laboratory study involving professional baseball pitchers (n = 318) performing pitching tests under the setting of 3D motion-capture (480 Hz). Main outcome measures included accuracy, sensitivity, specificity, F1 score, positive predictive value (PPV), and negative predictive value (NPV) of the random forest model., Results: The optimized random forest model resulted in an accuracy of 70.0 %, sensitivity of 70.3 %, specificity of 48.5 %, F1 equal to 80.6 %, PPV of 94.3 %, and a NPV of 11.6 %. Classification accuracy for predicting strikes and balls achieved an area under the curve of 0.67. Kinematics that derived the highest % increase in mean square error included: trunk flexion excursion(4.06 %), pelvis obliquity at foot contact(4.03 %), and trunk rotation at hand separation(3.94 %). Pitchers who threw strikes had significantly less trunk rotation at hand separation(p = 0.004) and less trunk flexion at ball release(p = 0.003) compared to balls. The positive predictive value for determining a strike was within an acceptable range, while the negative predictive value suggests if a pitch was determined as a ball, the model was not adequate in its prediction., Conclusions: Kinematic measures of pelvis and trunk were crucial determinants for the pitch classifier sequence, suggesting pitcher kinematics at the proximal body segments may be useful in determining final pitch location., Competing Interests: The authors, their immediate families, and any research foundation with which they are affiliated have not received any financial payments or other benefits from any commercial entity related to the subject of this article., (© 2023 Professor P K Surendran Memorial Education Foundation. Published by Elsevier B.V. All rights reserved.)
- Published
- 2023
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21. Directly Unveiling the Energy Transfer Dynamics between Alq 3 Molecules and Si by Ultrafast Optical Pump-Probe Spectroscopy.
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Tai YC, Tzeng WY, Lin JD, Kuo YH, Chen FR, Tu RJ, Huang MY, Pai SS, Chang NW, Tseng SY, Chen C, Lin CL, Yabushita A, Cheng SJ, and Luo CW
- Abstract
The energy transfer (ET) between organic molecules and semiconductors is a crucial mechanism for enhancing the performance of semiconductor-based optoelectronic devices, but it remains undiscovered. Here, ultrafast optical pump-probe spectroscopy was utilized to directly reveal the ET between organic Alq
3 molecules and Si semiconductors. Ultrathin SiO2 dielectric layers with a thickness of 3.2-10.8 nm were inserted between Alq3 and Si to prevent charge transfer. By means of the ET from Alq3 to Si, the SiO2 thickness-dependent relaxation dynamics of photoexcited carriers in Si have been unambiguously observed on the transient reflectivity change (Δ R / R ) spectra, especially for the relaxation process on a time scale of 200-350 ps. In addition, these findings also agree with the results of our calculation in a model of long-range dipole-dipole interactions, which provides critical information for developing future optoelectronic devices.- Published
- 2023
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22. Diabetes status and postoperative complications for patients receiving open rotator cuff repair.
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Quan T, Manzi JE, Chen FR, Rauck R, Recarey M, Roszkowska N, Morrison C, and Zimmer ZR
- Abstract
Background: Diabetic patients are known to have poor wound healing and worse outcomes following surgeries. The purpose of this study is to evaluate diabetes status and complications for patients receiving open rotator cuff repair., Methods: Patients undergoing open rotator cuff repair from 2006 to 2018 were identified in a national database. Patients were stratified into 3 cohorts: no diabetes mellitus, non-insulin dependent diabetes mellitus (NIDDM), and insulin dependent diabetes mellitus (IDDM). Differences in demographics, comorbidities, and complications were assessed with the use of bivariate and multivariate analyses., Results: Of 7678 total patients undergoing open rotator cuff repair, 6256 patients (81.5%) had no diabetes, 975 (12.7%) had NIDDM, and 447 (5.8%) had IDDM. Bivariate analyses revealed that IDDM patients had increased risk of mortality, extended length of stay, and readmission compared to non-diabetic patients ( p < 0.05 for all). IDDM patients had higher risks of major complications and readmission relative to NIDDM patients ( p < 0.05 for both). On multivariate analysis, there were no differences in any postoperative complications between the non-diabetic, NIDDM, and IDDM groups., Discussion: Diabetes does not affect postoperative complications following open rotator cuff repairs. Physicians should be aware of this finding and counsel their patients appropriately. Level of Evidence: III., Competing Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2021.)
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- 2023
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23. Kinematic and Kinetic Comparisons of Arm Slot Position Between High School and Professional Pitchers.
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Manzi JE, Ruzbarsky JJ, Krichevsky S, Sudah SY, Estrada J, Wang Z, Moran J, Kunze KN, Ciccotti MC, Chen FR, and Dines JS
- Abstract
Background: Throwing arm kinetics differ in pitchers at varying arm slot (AS) positions (frontal-plane arm position at ball release relative to the vertical axis)., Purpose: To determine how kinematic and kinetic values differ between professional and high school pitchers with varying AS positions, and whether these differences are similarly observed in both populations., Methods: High school (n = 130) and professional (n = 288) pitchers threw 8 to 12 fastballs under 3-dimensional motion capture technology. Pitchers in each cohort were subdivided based on mean AS position at ball release: AS
1 (least degree of AS: most overhand throwing styles), AS2 (intermediate degree of AS: three-quarter throwing styles), or AS3 (greatest degree of AS: most sidearm throwing styles). Kinetic and kinematic parameters were compared between groups., Study Design: Controlled laboratory study., Results: High school pitchers had a more overhand AS at ball release (50° ± 11°) compared with professional pitchers (58° ± 14°) ( P < .001). In both cohorts, AS1 pitchers had significantly greater shoulder abduction (high school, P <0.001; professional, P <0.0001) and lateral trunk flexion (high school, P < 0.001; professional, P <0.0001) at ball release compared with AS3 pitchers. Professional pitchers with an AS3 position had significantly delayed timing of maximum upper trunk angular velocity compared with AS1 pitchers (64% ± 7% vs 57% ± 7% of pitch time, respectively; P < .0001). A significant positive correlation between AS and elbow flexion torque was found in high school pitchers ( P = .002; β = 0.28), and a significant negative correlation between AS and elbow varus torque ( P < .001; β = -0.22) and shoulder internal rotation torque ( P < .001; β = -0.20) was noted in professional pitchers., Conclusion: AS position was related to shoulder abduction and trunk lateral tilt. Professional and high school pitchers with varying AS positions did not experience similar changes in throwing arm kinetics., Clinical Relevance: In professional pitchers, the earlier onset of maximum upper trunk angular velocity with overhand throwing style may reflect inappropriate pelvis-trunk timing separation, a parameter implicated in upper extremity injury, and the negative correlation between AS and elbow varus and shoulder internal rotation torque suggests that both excessive and minimal AS positions have negative implications., Competing Interests: One or more of the authors has declared the following potential conflict of interest or source of funding: J.J.R. has received hospitality payments from Smith & Nephew. M.C.C. has received education payments from Liberty Surgical. J.S.D. has received education payments from Gotham Surgical; consulting fees from Arthrex, Merck Sharp & Dohme, and Trice Medical; nonconsulting fees from Arthrex; and royalties from Arthrex and Linvatec. AOSSM checks author disclosures against the Open Payments Database (OPD). AOSSM has not conducted an independent investigation on the OPD and disclaims any liability or responsibility relating thereto., (© The Author(s) 2023.)- Published
- 2023
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24. The association between anesthesia type and postoperative outcomes in patients receiving primary total shoulder arthroplasty.
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Chen FR, Quan T, Ramamurti P, Sadur A, Tabaie S, and Zimmer ZR
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- Humans, Postoperative Complications epidemiology, Postoperative Complications etiology, Length of Stay, Anesthesia, General adverse effects, Postoperative Period, Retrospective Studies, Arthroplasty, Replacement, Shoulder adverse effects
- Abstract
Purpose: There has been interest to investigate optimal anesthetic techniques for primary total shoulder arthroplasty (TSA). In this study, we investigate if there are differences in postoperative complications in patients receiving (1) regional alone; (2) general alone; and (3) regional plus general anesthesia for primary TSA., Methods: Patients undergoing primary TSA from 2014 to 2018 were identified in a national database. Patients were stratified into 3 cohorts: general anesthesia, regional anesthesia, and general anesthesia combined with regional anesthesia. Thirty-day complications were assessed using bivariate and multivariate analyses., Results: Of 13,386 total patients undergoing TSA, 9079 patients (67.8%) had general anesthesia, 212 (1.6%) had regional anesthesia, and 4095 (30.6%) had general anesthesia combined with regional anesthesia. There were no significant differences in postoperative complications between the general anesthesia group and the regional anesthesia group. Following adjustment, an increased risk of extended length of hospital stay was seen in the combined general and regional anesthesia group compared to those who only had general anesthesia (p = 0.001)., Conclusion: General versus regional versus general plus regional anesthesia have no difference in postoperative complications in patients receiving primary total shoulder arthroplasty. However, addition of regional anesthesia to general anesthesia is associated with increased length of stay., Level of Evidence: III., (© 2023. The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature.)
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- 2023
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25. Multislip-enabled morphing of all-inorganic perovskites.
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Li X, Meng Y, Li W, Zhang J, Dang C, Wang H, Hung SW, Fan R, Chen FR, Zhao S, Ho JC, and Lu Y
- Abstract
All-inorganic lead halide perovskites (CsPbX
3 , X = Cl, Br or I) are becoming increasingly important for energy conversion and optoelectronics because of their outstanding performance and enhanced environmental stability. Morphing perovskites into specific shapes and geometries without damaging their intrinsic functional properties is attractive for designing devices and manufacturing. However, inorganic semiconductors are often intrinsically brittle at room temperature, except for some recently reported layered or van der Waals semiconductors. Here, by in situ compression, we demonstrate that single-crystal CsPbX3 micropillars can be substantially morphed into distinct shapes (cubic, L and Z shapes, rectangular arches and so on) without localized cleavage or cracks. Such exceptional plasticity is enabled by successive slips of partial dislocations on multiple [Formula: see text] systems, as evidenced by atomic-resolution transmission electron microscopy and first-principles and atomistic simulations. The optoelectronic performance and bandgap of the devices were unchanged. Thus, our results suggest that CsPbX3 perovskites, as potential deformable inorganic semiconductors, may have profound implications for the manufacture of advanced optoelectronics and energy systems., (© 2023. The Author(s), under exclusive licence to Springer Nature Limited.)- Published
- 2023
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26. Risks of Immunosuppressive Therapy in Patients Undergoing Open Reduction Internal Fixation for Ankle Fractures.
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Ifarraguerri AM, Gupta P, Quan T, Cohen JS, Chen FR, Zeitlin J, Manzi JE, Farley B, Ramamurti P, and Tabaie S
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- Humans, Surgical Wound Infection epidemiology, Surgical Wound Infection etiology, Fracture Fixation, Internal adverse effects, Open Fracture Reduction adverse effects, Risk Factors, Immunosuppression Therapy adverse effects, Immunosuppressive Agents adverse effects, Retrospective Studies, Postoperative Complications epidemiology, Postoperative Complications etiology, Treatment Outcome, Ankle Fractures etiology, Pulmonary Embolism etiology, Sepsis
- Abstract
Chronic steroid and immunosuppressant use have been shown to increase the risk for postoperative complications in orthopedic surgery. Further understanding of the risks of immunosuppression is necessary to aid in risk stratification and patient counseling. However, these risks have not yet been explored in ankle fracture patients. Thus, the purpose of this study is to determine whether patients taking immunosuppressives are at an increased risk for morbidity and mortality following open reduction and internal fixation (ORIF) of ankle fractures. Patients undergoing operative treatment for ankle fractures from 2006 to 2018 were identified in the National Surgical Quality Improvement Program database. Patients were categorized based on their use of immunosuppressive medications. Postoperative outcomes assessed included superficial surgical site infections, deep surgical site infections, organ space infections, wound dehiscence, pneumonia, unplanned intubation, pulmonary embolism, urinary tract infection, renal failure, blood transfusion requirement, deep vein thrombosis, sepsis, cardiac arrest, extended length of hospital stay, readmission, reoperation, and mortality. Univariate and multivariate analyses were performed. In total, 10,331 patients underwent operative treatment for ankle fracture. Total 10,153 patients (98.3%) were not taking immunosuppressants and 178 (1.7%) were taking these medications. In multivariate analysis, patients taking immunosuppressants were at increased risk of pulmonary embolism (odds ratio [OR] 4.382; p = .041) and hospital readmission (OR 2.131; p = .021). Use of immunosuppressive medications is an independent risk factor for pulmonary embolism and readmission following ORIF for ankle fractures. Notably, no association with wound complications, infections, or sepsis was identified., (Copyright © 2023 the American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.)
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- 2023
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27. Early adversity and depressive symptoms among early adolescent girls: the mediating role of exposure to recent interpersonal acute stress.
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Stroud CB, Chen FR, Dunning EE, Cheng J, Marr C, and Vrshek-Schallhorn S
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- Female, Humans, Adolescent, Longitudinal Studies, Risk Factors, Stress, Psychological complications, Depression etiology, Depression diagnosis, Life Change Events
- Abstract
Early adversity confers risk for depression in part through its association with recent (i.e., proximal) acute stress. However, it remains unresolved whether: a) early adversity predicts increases in recent acute stress over time; b) all - or only certain types - of recent events mediate the relationship between early adversity and depression; and c) early adversity places individuals at greater risk for depression via greater exposure to independent (i.e., fateful) interpersonal events or via greater generation of dependent (i.e., partially self-initiated) interpersonal events (i.e., stress generation) or both. These questions were examined in a 3-wave longitudinal study of early adolescent girls ( N = 125; M = 12.35 years [ SD = .77]) with no history of diagnosable depression using contextual life stress and diagnostic interviews. Path analyses indicated that increases in past-year acute interpersonal, but not non-interpersonal, stress mediated the link between early adversity and depressive symptoms. The mediating role of interpersonal events was limited to independent ones, suggesting increases in interpersonal event exposure , not interpersonal stress generation , acted as a mediator. Finally, findings support prior evidence that early adversity may not directly predict future depressive symptoms. Implications for understanding the role of recent stress in the association between early adversity and adolescent depression are discussed.
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- 2023
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28. Rationally heteroarylated pyridines as hole transport materials for OLEDs.
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Kumar K, Karmakar A, Chen FR, Jou JH, Ghosh S, Banik S, and Kumar S
- Abstract
The advancement in developing highly efficient hole transport materials for OLED devices has been a challenge over the past several years. For an efficient OLED device, there should be an efficient promotion of charge carriers from each electrode and effective confinement of triplet excitons in the emissive layer of the phosphorescent OLED (PhOLED). Thus, the development of stable and high triplet energy hole transport materials is in urgent demand for high-performing PhOLED devices. The present work demonstrates the development of two hetero-arylated pyridines as high triplet energy (2.74-2.92 eV) multifunctional hole transport materials to reduce the exciton quenching and to enhance the extent of charge carrier recombination in the emissive layer. In this regard, we report the design, synthesis, and theoretical modeling with electro-optical properties of two molecules, namely PrPzPy and MePzCzPy, with suitable HOMO/LUMO energy levels and high triplet energy, by incorporating phenothiazine as well as other donating units into a pyridine scaffold, and finally developing a hybrid phenothiazine-carbazole-pyridine based molecular architecture. The natural transition orbital (NTO) calculations were done to analyze the excited state sensation in these molecules. The long-range charge transfer characteristics between the higher singlet and triplet states were also analyzed. The reorganization energy of each molecule was calculated to examine their hole transportability. The theoretical calculations for PrPzPy and MePzCzPy revealed that these two molecular systems could be promising materials for the hole transport layer of OLED devices. As a proof of concept, a solution-processed hole-only device (HOD) of PrPzPy was fabricated. The increase in current density with an increase in operating voltage in the range of ∼3-10 V supported that the suitable HOMO energy of PrPzPy can facilitate the hole transportation from the hole injection layer (HIL) to the emissive layer (EML). These results indicated the promising hole transportability of the present molecular materials.
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- 2023
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29. Non-invasive model for predicting high-risk esophageal varices based on liver and spleen stiffness.
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Yang LB, Gao X, Li H, Tantai XX, Chen FR, Dong L, Dang XS, Wei ZC, Liu CY, and Wang Y
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- Humans, Spleen diagnostic imaging, Spleen pathology, Liver Cirrhosis diagnosis, Liver Cirrhosis diagnostic imaging, Hemorrhage, Esophageal and Gastric Varices diagnostic imaging, Esophageal and Gastric Varices etiology, Elasticity Imaging Techniques
- Abstract
Background: Acute bleeding due to esophageal varices (EVs) is a life-threatening complication in patients with cirrhosis. The diagnosis of EVs is mainly through upper gastrointestinal endoscopy, but the discomfort, contraindications and complications of gastrointestinal endoscopic screening reduce patient compliance. According to the bleeding risk of EVs, the Baveno VI consensus divides varices into high bleeding risk EVs (HEVs) and low bleeding risk EVs (LEVs). We sought to identify a non-invasive prediction model based on spleen stiffness measurement (SSM) and liver stiffness measurement (LSM) as an alternative to EVs screening., Aim: To develop a safe, simple and non-invasive model to predict HEVs in patients with viral cirrhosis and identify patients who can be exempted from upper gastrointestinal endoscopy., Methods: Data from 200 patients with viral cirrhosis were included in this study, with 140 patients as the modelling group and 60 patients as the external validation group, and the EVs types of patients were determined by upper gastrointestinal endoscopy and the Baveno VI consensus. Those patients were divided into the HEVs group (66 patients) and the LEVs group (74 patients). The effect of each parameter on HEVs was analyzed by univariate and multivariate analyses, and a non-invasive prediction model was established. Finally, the discrimination ability, calibration ability and clinical efficacy of the new model were verified in the modelling group and the external validation group., Results: Univariate and multivariate analyses showed that SSM and LSM were associated with the occurrence of HEVs in patients with viral cirrhosis. On this basis, logistic regression analysis was used to construct a prediction model: Ln [P/(1-P)] = -8.184 -0.228 × SSM + 0.642 × LSM. The area under the curve of the new model was 0.965. When the cut-off value was 0.27, the sensitivity, specificity, positive predictive value and negative predictive value of the model for predicting HEVs were 100.00%, 82.43%, 83.52%, and 100%, respectively. Compared with the four prediction models of liver stiffness-spleen diameter to platelet ratio score, variceal risk index, aspartate aminotransferase to alanine aminotransferase ratio, and Baveno VI, the established model can better predict HEVs in patients with viral cirrhosis., Conclusion: Based on the SSM and LSM measured by transient elastography, we established a non-invasive prediction model for HEVs. The new model is reliable in predicting HEVs and can be used as an alternative to routine upper gastrointestinal endoscopy screening, which is helpful for clinical decision making., Competing Interests: Conflict-of-interest statement: There was no any interests conflicts., (©The Author(s) 2023. Published by Baishideng Publishing Group Inc. All rights reserved.)
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- 2023
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30. The association between diabetes status and postoperative complications for patients receiving ACL reconstruction.
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Manzi JE, Quan T, Cantu N, Chen FR, Corrado C, Gu A, Tabaie S, Doerre T, and Best MJ
- Subjects
- Humans, Retrospective Studies, Hospitalization, Postoperative Complications epidemiology, Postoperative Complications etiology, Postoperative Complications surgery, Anterior Cruciate Ligament Injuries complications, Anterior Cruciate Ligament Injuries surgery, Anterior Cruciate Ligament Reconstruction adverse effects, Anterior Cruciate Ligament Reconstruction methods, Diabetes Mellitus epidemiology
- Abstract
Purpose: It is well established that diabetes is associated with complications following surgical procedures across the wide array of surgical subspecialties. The evidence on the effect of diabetes on postoperative outcomes following anterior cruciate ligament (ACL) reconstruction (ACLR), however, is not as robust, and findings have not been consistent. It was hypothesized that patients with diabetes are at increased risk of complications and a higher rate of hospital admission following ACLR., Methods: The National Surgical Quality Improvement Program database was queried for patients undergoing ACL reconstruction from 2006 to 2019. Two patient cohorts were defined in this retrospective study: patients with diabetes and patients without diabetes. The various patient demographics, medical comorbidities, and postoperative outcomes were compared between the two groups, with the use of bivariate and multivariate analyses., Results: Of 9,576 patients who underwent ACL reconstruction, 9,443 patients (98.6%) did not have diabetes, whereas 133 patients (1.4%) had diabetes. Following adjustment on multivariate analyses, compared to non-diabetic patients, those with diabetes had an increased risk of admission to the hospital within thirty days of the surgery (OR 2.14; p = 0.002)., Conclusion: Patients with diabetes have a significantly higher risk of being admitted to the hospital compared to those without the disease. Clinicians should be aware of diabetic patients who undergo ACLR to ensure appropriate pre- and postoperative care to minimize complications in this patient population., (© 2022. The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature.)
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- 2023
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31. Is seizure disorder a risk factor for complications following surgical treatment of hip dysplasia in the pediatric population?
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Quan T, Pizzarro J, Mcdaniel L, Manzi JE, Agarwal AR, Chen FR, and Tabaie S
- Subjects
- Humans, Child, Retrospective Studies, Risk Factors, Surgical Wound Infection, Postoperative Complications epidemiology, Postoperative Complications etiology, Hip Dislocation complications, Epilepsy epidemiology, Epilepsy surgery, Epilepsy complications, Hip Dislocation, Congenital complications
- Abstract
The impact of seizure disorders on pediatric patients who undergo hip dysplasia surgery has yet to be elucidated. This study focused on identifying the effect of seizure disorders on the incidence of complications following surgical management of hip dysplasia. Pediatric patients undergoing surgical treatment for hip dysplasia from 2012 to 2019 were identified in the National Surgical Quality Improvement Program-Pediatric database. Patients were divided into two cohorts: patients with and patients without a seizure disorder. Patient demographics, comorbidities and postoperative outcomes were compared between the two groups. Bivariate and multivariate analyses were performed. Of 10 853 pediatric patients who underwent hip dysplasia surgery, 8117 patients (74.8%) did not have a seizure disorder whereas 2736 (25.2%) had a seizure disorder. Bivariate analyses revealed that compared to patients without a seizure disorder, patients with a seizure disorder were at increased risk of developing surgical site infections, pneumonia, unplanned reintubation, urinary tract infection, postoperative transfusion, sepsis, extended operation time and length of stay and readmission ( P < 0.05 for all). Following adjustment for patient demographics and comorbidities on multivariate analysis, there were no differences in any postoperative complications between pediatric patients with and without a seizure disorder. There were no differences in 30-day postoperative complications in patients with and without a seizure disorder. Due to potential decreased bone mineral density as an effect of antiepileptic drugs and the risk of femur fracture during surgery for hip dysplasia, pediatric patients with a seizure disorder should be closely monitored as they may be more susceptible to injury. Level of Evidence: III., (Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2023
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32. Parentification Vulnerability, Reactivity, Resilience, and Thriving: A Mixed Methods Systematic Literature Review.
- Author
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Dariotis JK, Chen FR, Park YR, Nowak MK, French KM, and Codamon AM
- Subjects
- Adult, Adolescent, Humans, Parenting, Adaptation, Psychological, Social Behavior, Pandemics, COVID-19 epidemiology
- Abstract
Parentification occurs when youth are forced to assume developmentally inappropriate parent- or adult-like roles and responsibilities. This review thoroughly examines current empirical research on parentification, its outcomes, and related mechanisms to outline patterns of findings and significant literature gaps. This review is timely in the large context of the COVID-19 pandemic, when pandemic-induced responsibilities and demands on youth, and the shifting family role may exacerbate parentification and its consequences. We used the 2020 updated Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) framework to identify 95 studies (13 qualitative, 81 quantitative, 1 mixed methods) meeting eligibility criteria. Representation from six continents highlights parentification as a global phenomenon. Using thematic analysis, we identified five themes from qualitative studies and five from quantitative studies. These were further integrated into four common themes: (1) some parentified youth experienced positive outcomes (e.g., positive coping), albeit constructs varied; (2) to mitigate additional trauma, youth employed various protective strategies; (3) common negative outcomes experienced by youth included internalizing behaviors, externalizing problems, and compromised physical health; and (4) youths' characteristics (e.g., rejection sensitivity, attachment style), perceived benefits, and supports influenced parentification outcomes. Future methodological and substantive directions are discussed.
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- 2023
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33. Radiomics-based survival risk stratification of glioblastoma is associated with different genome alteration.
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Xu PF, Li C, Chen YS, Li DP, Xi SY, Chen FR, Li X, and Chen ZP
- Subjects
- Humans, Magnetic Resonance Imaging methods, Risk Assessment, Retrospective Studies, Glioblastoma diagnostic imaging, Glioblastoma genetics
- Abstract
Background: Glioblastoma (GBM) is a remarkable heterogeneous tumor with few non-invasive, repeatable, and cost-effective prognostic biomarkers reported. In this study, we aim to explore the association between radiomic features and prognosis and genomic alterations in GBM., Methods: A total of 180 GBM patients (training cohort: n = 119; validation cohort 1: n = 37; validation cohort 2: n = 24) were enrolled and underwent preoperative MRI scans. From the multiparametric (T1, T1-Gd, T2, and T2-FLAIR) MR images, the radscore was developed to predict overall survival (OS) in a multistep postprocessing workflow and validated in two external validation cohorts. The prognostic accuracy of the radscore was assessed with concordance index (C-index) and Brier scores. Furthermore, we used hierarchical clustering and enrichment analysis to explore the association between image features and genomic alterations., Results: The MRI-based radscore was significantly correlated with OS in the training cohort (C-index: 0.70), validation cohort 1 (C-index: 0.66), and validation cohort 2 (C-index: 0.74). Multivariate analysis revealed that the radscore was an independent prognostic factor. Cluster analysis and enrichment analysis revealed that two distinct phenotypic clusters involved in distinct biological processes and pathways, including the VEGFA-VEGFR2 signaling pathway (q-value = 0.033), JAK-STAT signaling pathway (q-value = 0.049), and regulation of MAPK cascade (q-value = 0.0015/0.025)., Conclusions: Radiomic features and radiomics-derived radscores provided important phenotypic and prognostic information with great potential for risk stratification in GBM., Competing Interests: Declaration of competing interest The authors declare no competing interest., (Copyright © 2023 Elsevier Ltd. All rights reserved.)
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- 2023
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34. Enhanced Superconductivity and Rashba Effect in a Buckled Plumbene-Au Kagome Superstructure.
- Author
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Chen WH, Chen CH, Chen GH, Chen WC, Chen FR, Chen PJ, Ku CK, Lee CT, Kawakami N, Li JY, Matsuda I, Chang WH, Lin JJ, Wu CT, Mou CY, Jeng HT, Tang SJ, and Lin CL
- Abstract
Plumbene, with a structure similar to graphene, is expected to possess a strong spin-orbit coupling and thus enhances its superconducting critical temperature (T
c ). In this work, a buckled plumbene-Au Kagome superstructure grown by depositing Au on Pb(111) is investigated. The superconducting gap monitored by temperature-dependent scanning tunneling microscopy/spectroscopy shows that the buckled plumbene-Au Kagome superstructure not only has an enhanced Tc with respect to that of a monolayer Pb but also possesses a higher value than what owned by a bulk Pb substrate. By combining angle-resolved photoemission spectroscopy with density functional theory, the monolayer Au-intercalated low-buckled plumbene sandwiched between the top Au Kagome layer and the bottom Pb(111) substrate is confirmed and the electron-phonon coupling-enhanced superconductivity is revealed. This work demonstrates that a buckled plumbene-Au Kagome superstructure can enhance superconducting Tc and Rashba effect, effectively triggering the novel properties of a plumbene., (© 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.)- Published
- 2023
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35. Molecular and functional analysis of chitin synthase genes in Chilo suppressalis (Lepidoptera: Crambidae).
- Author
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Zeng B, Chen FR, Sun H, Liu Y, Wu SF, Bass C, and Gao CF
- Subjects
- Animals, Chitin Synthase genetics, Chitin Synthase metabolism, Larva genetics, Molting genetics, Lepidoptera genetics, Moths, Insecticides metabolism, Oryza
- Abstract
The rice stem borer, Chilo suppressalis, has developed a high level of resistance to many of the compounds currently used for control. There is therefore an urgent need to develop novel control methods for C. suppressalis. Insect chitin synthases (CHS) have attracted interest as a potential target for insect pest management. However, to date, CHS have not been characterized in C. suppressalis. Two CHS genes (CsCHS1 and CsCHS2) were identified and cloned from C. suppressalis. Two transcript variants were identified for CsCHS1, CsCHS1a and CsCHS1b. Spatiotemporal expression profiling showed that both transcripts of CsCHS1 are most highly expressed on the last day of each larval instar stage and show the highest expression levels in the integument. In contrast, CsCHS2 is predominantly expressed during the larval feeding stages and shows the highest expression levels in the midgut. Knockdown of CsCHS1 by RNA interference significantly inhibited the molting and pupation of C. suppressalis, and knockdown of CsCHS2 significantly affected growth during the larval stage, but had no significant effect on the pupation. Moreover, knockout of CsCHS1 by CRISPR/Cas9 genome editing severely lowered the hatching rate, larval survivorship, pupation rate, and eclosion rate, but only larval survivorship at the G0 generation was lowered after the knockout of CsCHS2. These results demonstrate that CsCHS1 and CsCHS2 play vital roles in the growth and development of C. suppressalis, and so have potential as insecticidal targets for the control of this highly damaging pest., (© 2022 Institute of Zoology, Chinese Academy of Sciences.)
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- 2023
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36. Direct Visualization of the Self-Alignment Process for Nanostructured Block Copolymer Thin Films by Transmission Electron Microscopy.
- Author
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Hung CJ, Panda AS, Lee YC, Liu SY, Lin JW, Wang HF, Avgeropoulos A, Tseng FG, Chen FR, and Ho RM
- Abstract
Herein, this work aims to directly visualize the morphological evolution of the controlled self-assembly of star-block polystyrene- block -polydimethylsiloxane (PS- b -PDMS) thin films via in situ transmission electron microscopy (TEM) observations. With an environmental chip, possessing a built-in metal wire-based microheater fabricated by the microelectromechanical system (MEMS) technique, in situ TEM observations can be conducted under low-dose conditions to investigate the development of film-spanning perpendicular cylinders in the block copolymer (BCP) thin films via a self-alignment process. Owing to the free-standing condition, a symmetric condition of the BCP thin films can be formed for thermal annealing under vacuum with neutral air surface, whereas an asymmetric condition can be formed by an air plasma treatment on one side of the thin film that creates an end-capped neutral layer. A systematic comparison of the time-resolved self-alignment process in the symmetric and asymmetric conditions can be carried out, giving comprehensive insights for the self-alignment process via the nucleation and growth mechanism.
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- 2023
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37. Preoperative Dehydration Increases the Risk of Extended Length of Hospital Stay Following Total Ankle Arthroplasty.
- Author
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Quan T, Magruder M, Chen FR, Tabaie S, Best MJ, and Aiyer A
- Abstract
Introduction: The effects of preoperative dehydration on outcomes following total ankle arthroplasty (TAA) remain unknown. Therefore, the purpose of this study is to evaluate the association between dehydration and postoperative complications for patients undergoing TAA., Methods: Patients undergoing TAA from 2007 to 2019 were identified in the National Surgical Quality Improvement Program (NSQIP) database. A preoperative serum blood urea nitrogen/creatinine (BUN/Cr) greater than 20 was used to define preoperative dehydration. Patients were stratified into 2 cohorts: patients who were dehydrated (BUN/Cr > 20) and patients without dehydration (BUN/Cr ≤ 20). In this analysis, various postoperative outcomes were assessed with bivariate and multivariate analyses., Results: In total, 1033 patients underwent TAA and had their serum BUN and Cr values recorded. For both BUN and Cr, the patients in this study had their serum values recorded a mean of 15 days before their surgery. A total of 588 patients (56.9%) did not have dehydration preoperatively and 445 patients (43.1%) were dehydrated. Following adjustment on multivariate analysis, an increased risk of extended length of hospital stay (odds ratio [OR] = 1.457; p = 0.024) was seen in the dehydrated group compared with those who were noted to be well hydrated., Conclusion: As fluid intake is one modifiable preoperative variable that can be easily monitored during elective procedures, it is important for physicians to be aware of patients who are dehydrated and adjust their fluids appropriately to optimize postoperative outcomes., Levels of Evidence: Level III: Retrospective cohort study.
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- 2023
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38. Evaluating the association between pulmonary abnormalities and complications following pediatric hip dysplasia surgery.
- Author
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Pizzarro J, Quan T, Manzi JE, Chen FR, Gu A, and Tabaie S
- Subjects
- Humans, Child, Postoperative Complications etiology, Thorax, Databases, Factual, Retrospective Studies, Hip Dislocation complications, Hip Dislocation, Congenital surgery
- Abstract
Purpose: Developmental dysplasia of the hip (DDH) encompasses a wide range of abnormal hip development and is a common condition in the pediatric population. Congenital pulmonary abnormalities are typically mild in the pediatric population but can be associated with severe comorbid conditions. The purpose of this study was to analyze the effect of structural pulmonary/airway abnormalities on the incidence of postoperative complications following surgical management of DDH., Methods: From 2012 to 2019, the National Surgical Quality Improvement Program-Pediatric database was utilized to identify pediatric patients undergoing surgical treatment for hip dysplasia. Patients were stratified into two groups: patients with a structural pulmonary/airway abnormality and patients without a pulmonary abnormality. Patient demographics, comorbidities, and postoperative complications were compared between the two cohorts with the use of various statistical analyses, including bivariate and multivariate analyses., Results: Of the 10,853 patients who underwent surgical treatment for hip dysplasia, 10,157 patients (93.6%) did not have a structural pulmonary/airway abnormality whereas 696 (6.4%) had an airway abnormality. Following adjustment on multivariate analysis, patients with a structural pulmonary abnormality had an increased risk of cardiac arrest requiring cardiopulmonary resuscitation (OR 2.342; p = 0.045)., Conclusion: The results indicated that patients with a structural pulmonary abnormality had an increased risk of cardiac arrest requiring cardiopulmonary resuscitation compared to those without a pulmonary abnormality. Ensuring appropriate preoperative evaluation with a multidisciplinary team and close monitoring postoperatively is important to prevent the risk of severe outcomes in this vulnerable patient population., (© 2022. The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature.)
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- 2023
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39. Psychosocial Burden of Pediatric and Adult Patients With Congenital Versus Traumatic Facial Differences: Assessment of Psychiatric Distress and Healthcare Utilization in the United States From 2004 to 2012.
- Author
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Leung KL, Yang JJ, Chen FR, Kim E, and Gosman AA
- Subjects
- Adolescent, Child, Humans, Adult, United States, Patient Acceptance of Health Care, Emotions
- Abstract
Background: Psychiatric distress and its effects on healthcare utilization in pediatric patients with congenital and traumatic facial differences remain poorly understood. This study analyzes the psychosocial burden along with mental health and reconstructive surgery services utilization of this patient population in comparison with adult patients with such facial differences., Methods: The 2004-2012 Medical Expenditures Panel Survey was queried for all patients with facial differences. Socioeconomic variables, Patient Health Questionnaire 2 and Kessler 6 scores, responses from validated screening surveys, and utilization of mental health and reconstructive surgery (ie, plastic surgery and otolaryngology) services were compared between pediatric and adult patients with congenital and traumatic facial differences., Results: Children ages 5 to 12 years were more likely to be affected by facial trauma, whereas adolescents aged 13 to 17 years were more affected by congenital facial conditions. Pediatric patients with congenital facial conditions had higher rates of medical care, education, and special therapy utilization ( P < 0.0001), although their facial trauma counterparts used mental health services more often ( P < 0.0001). In adults, more facial trauma patients reported poorer perceived mental health status ( P = 0.01). Among patients with any facial difference, distressed adult patients were less likely to see a reconstructive surgeon even when controlling for socioeconomic variables (0.55 [0.31-0.97], P = 0.04)., Conclusions: In the pediatric population, psychosocial considerations should include both age and etiology of facial differences to best optimize care. Among adults with facial trauma, poor mental health may contribute to lower rates of surgical follow-up, highlighting a potential benefit for provision of mental health services earlier for these patient populations., Competing Interests: Conflicts of interest and sources of funding: none declared., (Copyright © 2023 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2023
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40. Second Near-Infrared (NIR-II) Window for Imaging-Navigated Modulation of Brain Structure and Function.
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Zhang K, Chen FR, Wang L, and Hu J
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- Humans, Fluorescent Dyes chemistry, Brain, Optical Imaging methods, Contrast Media, Glioblastoma
- Abstract
For a long time, optical imaging of the deep brain with high resolution has been a challenge. Recently, with the advance in second near-infrared (NIR-II) bioimaging techniques and imaging contrast agents, NIR-II window bioimaging has attracted great attention to monitoring deeper biological or pathophysiological processes with high signal-to-noise ratio (SNR) and spatiotemporal resolution. Assisted with NIR-II bioimaging, the modulation of structure and function of brain is promising to be noninvasive and more precise. Herein, in this review, first the advantage of NIR-II light in brain imaging from the interaction between NIR-II and tissue is elaborated. Then, several specific NIR-II bioimaging technologies are introduced, including NIR-II fluorescence imaging, multiphoton fluorescence imaging, and photoacoustic imaging. Furthermore, the corresponding contrast agents are summarized. Next, the application of various NIR-II bioimaging technologies in visualizing the characteristics of cerebrovascular network and monitoring the changes of the pathology signals will be presented. After that, the modulation of brain structure and function based on NIR-II bioimaging will be discussed, including treatment of glioblastoma, guidance of cell transplantation, and neuromodulation. In the end, future perspectives that would help improve the clinical translation of NIR-II light are proposed., (© 2023 Wiley-VCH GmbH.)
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- 2023
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41. In Situ Growth of Iron Sulfide on Fast Charge Transfer V 2 C-MXene for Superior Sodium Storage Anodes.
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Xiong Z, Shi H, Zhang W, Yan J, Wu J, Wang C, Wang D, Wang J, Gu Y, Chen FR, Yang Y, Xu B, and Yan X
- Abstract
Due to the upstream pressure of lithium resources, low-cost sodium-ion batteries (SIBs) have become the most potential candidates for energy storage systems in the new era. However, anode materials of SIBs have always been a major problem in their development. To address this, V
2 C/Fe7 S8 @C composites with hierarchical structures prepared via an in situ synthesis method are proposed here. The 2D V2 C-MXene as the growth substrate for Fe7 S8 greatly improves the rate capability of SIBs, and the carbon layer on the surface provides a guarantee for charge-discharge stability. Unexpectedly, the V2 C/Fe7 S8 @C anode achieves satisfactory sodium storage capacity and exceptional rate performance (389.7 mAh g-1 at 5 A g-1 ). The sodium storage mechanism and origin of composites are thoroughly studied via ex situ characterization techniques and first-principles calculations. Furthermore, the constructed sodium-ion capacitor assembled with N-doped porous carbon delivers excellent energy density (135 Wh kg-1 ) and power density (11 kW kg-1 ), showing certain practical value. This work provides an advanced system of sodium storage anode materials and broadens the possibility of MXene-based materials in the energy storage., (© 2023 Wiley-VCH GmbH.)- Published
- 2023
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42. The Effects of Chronic Steroid Use on Postoperative Complications Following Thyroidectomy.
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Koh ES, Chen FR, Chen S, Quan T, Leung KL, and Yang J
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- Humans, Thyroidectomy adverse effects, Postoperative Complications epidemiology, Postoperative Complications etiology, Risk Factors, Postoperative Hemorrhage epidemiology, Postoperative Hemorrhage etiology, Steroids, Retrospective Studies, Pulmonary Embolism etiology, Wound Infection
- Abstract
Background: Patients undergoing thyroidectomy are sometimes on chronic steroids for underlying disease. This study examined the postoperative risk profile of thyroidectomy patients on chronic steroids., Methods: Patients in the National Surgical Quality Improvement Program (NSQIP) database who underwent thyroidectomy were sorted by presence or absence of chronic steroid use. Clinicodemographics, comorbidities, and postoperative complications were recorded and compared between the two. Univariate and multivariate analyses compared the groups and calculated odds ratios (OR)., Results: We identified 42,857 patients. 41,903 (97.8%) patients were not on chronic steroids, while 954 (2.2%) were. Most underwent total thyroidectomy (18,748, 43.75%) or total lobectomy (16,323, 38.09%). Following univariate and multivariate analyses, patients on chronic steroids had increased risk of postoperative bleeding and transfusions (OR = 0.375, p = 0.046, 95% CI 0.223-0.988), open wound infection (OR = 0.226, p < 0.001, 95% CI 0.117-0.437), pulmonary embolism (OR = 0.312, p = 0.034, 95% CI 0.106-0.918), and ventilator use > 48 h (OR = 0.401, p < 0.008, 95% CI 0.205-0.785)., Conclusions: Chronic steroid use prior to thyroidectomy is an independent risk factor for multiple postoperative complications, namely postoperative bleeding and transfusions, open wound infection, pulmonary embolism, and ventilator use over 48 h. Patients on chronic steroids should be medically optimized before thyroidectomy to reduce the risk of potentially life-threatening complications., (© 2023. The Author(s) under exclusive licence to Société Internationale de Chirurgie.)
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- 2023
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43. Probing the Boundary between Classical and Quantum Mechanics by Analyzing the Energy Dependence of Single-Electron Scattering Events at the Nanoscale.
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Kisielowski C, Specht P, Helveg S, Chen FR, Freitag B, Jinschek J, and Van Dyck D
- Abstract
The relation between the energy-dependent particle and wave descriptions of electron-matter interactions on the nanoscale was analyzed by measuring the delocalization of an evanescent field from energy-filtered amplitude images of sample/vacuum interfaces with a special aberration-corrected electron microscope. The spatial field extension coincided with the energy-dependent self-coherence length of propagating wave packets that obeyed the time-dependent Schrödinger equation, and underwent a Goos-Hänchen shift. The findings support the view that wave packets are created by self-interferences during coherent-inelastic Coulomb interactions with a decoherence phase close to Δ φ = 0.5 rad. Due to a strictly reciprocal dependence on energy, the wave packets shrink below atomic dimensions for electron energy losses beyond 1000 eV, and thus appear particle-like. Consequently, our observations inevitably include pulse-like wave propagations that stimulate structural dynamics in nanomaterials at any electron energy loss, which can be exploited to unravel time-dependent structure-function relationships on the nanoscale.
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- 2023
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44. Development and preliminary validation of Cancer-related Psychological Flexibility Questionnaire.
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Ou MJ, Xu XH, Chen H, Chen FR, and Shen S
- Abstract
The Cancer-related Psychological Flexibility Questionnaire (CPFQ) was developed and validated for assessing cancer patients' psychological flexibility, including attitudes and behavior toward cancer. In a systematic process, the CPFQ identified four factors through principal component analysis and confirmatory factor analysis: Cancer Acceptance, Cancer Avoidance, Activity Engagement, and Valued Action. The results of this study reveal that the CPFQ has a clear factor structure and good psychometric properties. The specific nature of cancer and the need for a specific measure of cancer patient psychological flexibility make this questionnaire valuable for research on psychological flexibility in cancer patients., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Ou, Xu, Chen, Chen and Shen.)
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- 2023
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45. Decreased GDF9 and BMP15 in follicle fluid and granulosa cells and outcomes of IVF-ET among young patients with low prognosis.
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Huang TH, Chen FR, Zhang YN, Chen SQ, Long FY, Wei JJ, Zhang K, Zeng JZ, Zhu QY, Li-Ling J, and Gong Y
- Subjects
- Animals, Female, Fertilization in Vitro, Granulosa Cells metabolism, Oocytes metabolism, Prognosis, Prospective Studies, RNA, Messenger genetics, RNA, Messenger metabolism, Bone Morphogenetic Protein 15 genetics, Growth Differentiation Factor 9 genetics, Growth Differentiation Factor 9 metabolism
- Abstract
Purpose: To analyze the level of growth differentiation factor 9 (GDF9) and bone morphogenetic protein 15 (BMP15) in follicle fluid (FF) and granulosa cells (GCs) derived from young patients with low prognosis for in vitro fertilization and embryo transfer (IVF-ET) treatment., Methods: A prospective cohort study was carried out by enrolling 52 young patients with low prognosis according to the POSEIDON classification group 3 (low prognosis group) and 51 young patients with normal ovarian reserve (control group). The concentration of the GDF9 and BMP15 proteins in FF was determined by enzyme-linked immunosorbent assay. The mRNA level of the GDF9 and BMP15 in the GCs was measured by quantitative real-time PCR., Results: The concentration of GDF9 (1026.72 ± 159.12 pg/mL vs. 1298.06 ± 185.41 pg/mL) and BMP15 (685.23 ± 143.91 pg/mL vs. 794.37 ± 81.79 pg/mL) in FF and the mRNA level of GDF9 and BMP15 in the GCs and the live birth rate per treatment cycle started (30.77% vs. 50.98%) and oocytes retrieved (4.25 ± 1.91 vs.12.04 ± 4.24) were significantly lower, whereas the canceled cycle rate was significantly higher (9.62% vs. 0) in the low prognosis group compared with the control group (P < 0.05). The expression of GDF9 and BMP15 in the ovary was positively correlated with live birth (P < 0.05)., Conclusion: The expression of GDF9 and BMP15 in the ovary was decreased in young patients with low prognosis accompanied by a poorer outcome of IVF-ET treatment., Trial Registration: ChiCTR1800016107 (Chinese Clinical Trial Registry), May 11, 2018. ( http://www.chictr.org.cn/edit.aspx?pid=27216&htm=4 )., (© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2023
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46. Deep learning based atomic defect detection framework for two-dimensional materials.
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Chen FR, Lin CY, Siao HY, Jian CY, Yang YC, and Lin CL
- Abstract
Defects to popular two-dimensional (2D) transition metal dichalcogenides (TMDs) seriously lower the efficiency of field-effect transistor (FET) and depress the development of 2D materials. These atomic defects are mainly identified and researched by scanning tunneling microscope (STM) because it can provide precise measurement without harming the samples. The long analysis time of STM for locating defects in images has been solved by combining feature detection with convolutional neural networks (CNN). However, the low signal-noise ratio, insufficient data, and a large amount of TMDs members make the automatic defect detection system hard to be applied. In this study, we propose a deep learning-based atomic defect detection framework (DL-ADD) to efficiently detect atomic defects in molybdenum disulfide (MoS
2 ) and generalize the model for defect detection in other TMD materials. We design DL-ADD with data augmentation, color preprocessing, noise filtering, and a detection model to improve detection quality. The DL-ADD provides precise detection in MoS2 (F2-scores is 0.86 on average) and good generality to WS2 (F2-scores is 0.89 on average)., (© 2023. The Author(s).)- Published
- 2023
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47. The Association between Bleeding Disorders and Postoperative Complications Following Operative Treatment of Distal Radius Fracture.
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Quan T, Chen FR, Manzi JE, Mcdaniel L, Howard P, Marquardt C, Ranson R, and Tabaie S
- Abstract
Background While previous studies have investigated the association between bleeding disorders and outcomes with hip or knee surgeries, no studies have investigated the association between bleeding disorders and outcomes in upper extremity surgery. Questions/Purposes The purpose of this study was to investigate if a past history of bleeding disorders is associated with which, if any postoperative complications for patients receiving distal radius fracture open reduction internal fixation. Patients and Methods Patients undergoing operative treatment for distal radius fracture from 2007 to 2018 were identified in the National Surgical Quality Improvement Program database. Patients were stratified into two cohorts: patients with a bleeding disorder and patients without a bleeding disorder. In this analysis, 30-day postoperative complications were assessed, as well as mortality, extended length of stay, reoperation, and readmission. Bivariate and multivariate analyses were performed. Results Of the 16,489 total patients undergoing operative treatment for distal radius fracture, 16,047 patients (97.3%) did not have a bleeding disorder, whereas 442 (2.7%) had a bleeding disorder. Following adjustment on multivariate analyses, an increased risk of postoperative transfusion requirement (odds ratio [OR] 17.437; p = 0.001), extended length of hospital stay more than 3 days (OR 1.564; p = 0.038), and readmission (OR 2.515; p < 0.001) were seen in patients with a bleeding disorder compared to those without a bleeding disorder. Conclusion History of bleeding disorders is an independent risk factor for transfusions, extended length of stay, and readmission. We recommend a multidisciplinary team approach to addressing bleeding disorders before patients receive distal radius fracture open reduction internal fixation. Level of Evidence Level III, retrospective study., Competing Interests: Conflict of Interest S.A.T. reported consulting fees for Education consultant from OrthoPediatrics. And Committee member in the following organizations: AAOS, POSNA, AACPDM, and IAACD. The authors have no other conflicts of interest to declare that are relevant to the content of this article., (Thieme. All rights reserved.)
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- 2023
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48. In Situ Tracking of Crystal-Surface-Dependent Cu 2 O Nanoparticle Dissolution in an Aqueous Environment.
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Wang X, Hung TF, Chen FR, and Wang WX
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- Solubility, Oxides, Microscopy, Electron, Transmission, Particle Size, Metal Nanoparticles chemistry
- Abstract
Metal-oxide-based nanoparticles (MONPs) such as Cu
2 O NPs have attracted growing attention, but the potential discharges of MONPs have raised considerable concern of their environmental fate including their dissolution behavior. The impacts of morphology on MONP dissolution are largely uncertain due to the lack of in situ tracking techniques. In this study, we combined a series of in situ technologies including liquid-cell transmission electron microscopy and fluorescence probes to reveal the in situ dissolution process of Cu2 O NPs in freshwater. Our results suggest that cubic Cu2 O NPs exhibit a higher dissolution quantity compared with spherical NPs of the same surface area. The difference was mainly related to the crystal surface, while other factors such as particle size or aggregation status showed minor effects. Importantly, we demonstrated the simultaneous growth of new small NPs and the dissolution of pristine Cu2 O NPs during the dissolution of Cu2 O NPs. Cubic Cu2 O NPs became much less soluble under O2 -limited conditions, suggesting that O2 concentration largely affected the dependence of dissolution on the NP morphology. Our findings highlight the potential application of in situ techniques to track the environmental fates of MONPs, which would provide important information for assessing the ecological risks of engineered NPs.- Published
- 2023
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49. Boston Carpal Tunnel Questionnaire Scores Alone Do Not Predict Surgical Intervention for Patients With Carpal Tunnel Syndrome.
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Chen FR, Kerluku J, Manzi JE, Chen AZ, Nguyen JT, Wessel LE, Osei DA, and Fufa DT
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- Humans, Upper Extremity, Surveys and Questionnaires, Boston, Carpal Tunnel Syndrome diagnosis, Carpal Tunnel Syndrome surgery
- Abstract
Background: With the expanded indications for telemedicine, there is increased utility for screening methods to determine which patients are likely to progress to surgical intervention, requiring in-person visits. Patient-rated tools such as the Boston Carpal Tunnel Questionnaire (BCTQ) may be one such tool for screening patients with carpal tunnel syndrome (CTS). The aim of the study was to evaluate whether BCTQ scores were predictive of offering conservative treatment or surgical intervention for CTS., Methods: Patients diagnosed with CTS from January 2017 to February 2020 completed BCTQ questionnaires prior to in-person office visits. Demographics, comorbidities, and highest level of intervention recommended were recorded for each patient as conservative, injection, or surgery. Pearson χ
2 and independent-samples t tests were conducted to determine whether BCTQ symptom severity and functional scores were associated with intervention type., Results: A total of 200 patients with CTS were included. Of these, 103 were recommended conservative or injection treatment and 97 were recommended surgery. There were no differences in comorbidities between groups, including other upper extremity pathology ( P = .57), previous upper extremity surgery ( P = .32), hypertension ( P = .17), hypothyroidism ( P = .15), rheumatoid arthritis ( P = .34), and diabetes ( P = .30). Between these groups, there were no differences in BCTQ symptom severity score (symptom severity scale [SSS]; P = .16) or BCTQ functional severity score (functional severity scale [FSS]; P = .96)., Conclusions: There is no correlation between comorbidities and BCTQ SSS or FSS score, and offering surgery for CTS. In an era of minimizing non-essential health care visits, the BCTQ is insufficient in screening patients as potential surgical candidates.- Published
- 2023
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50. Zinc finger protein 671 has a cancer-inhibiting function in colorectal carcinoma via the deactivation of Notch signaling.
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Wang Y, Chen FR, Wei CC, Sun LL, Liu CY, Yang LB, and Guo XY
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- Humans, DNA Methylation, Signal Transduction, Zinc Fingers, Gene Expression Regulation, Neoplastic, Cell Line, Tumor, Tumor Suppressor Proteins metabolism, Colorectal Neoplasms drug therapy, Colorectal Neoplasms genetics, Colorectal Neoplasms metabolism
- Abstract
Zinc finger protein 671 (ZNF671) has been described as a vital cancer inhibitor in multiple neoplasms, yet the functional roles of ZNF671 in colorectal carcinoma (CRC) remain unresolved. This project examined the possible link between ZNF671 and CRC. Lower levels of ZNF671 were observed in CRC tissue compared with noncancerous tissue, which were related to a worse survival rate in CRC patients. High methylation levels at the ZNF671 gene promoter region were shown in CRC tissue, which were inversely correlated with ZNF671 expression. Treatment with demethylation agents restored ZNF671 levels in CRC cell lines. Up-regulation of ZNF671 resulted in suppressive effects on the proliferative ability and metastatic potency of CRC cells. Moreover, the up-regulation of ZNF671 reinforced the chemosensitivity of CRC cells. A mechanism study determined ZNF671 to be a vital mediator of Notch signaling. The up-regulation of ZNF671 decreased the expression of Notch1 and lowered the levels of NICD, HES1, and HEY1. The overexpression of NICD1 diminished ZNF671-mediated antitumor effects. ZNF671 depletion reinforced Notch signaling, and Notch suppression reversed ZNF671-depletion-elicited protumor effects. Moreover, the overexpression of ZNF671 weakened the tumorigenicity of CRC cells in a xenograft model in vivo. In summary, ZNF671 exerts a cancer-inhibiting function in CRC via the deactivation of Notch signaling. Low ZNF671 levels caused by gene promoter hypermethylation contribute to the malignant transformation of CRC. This work underlines the interest of ZNF671 as a target candidate for exploiting novel anti-CRC therapies., Competing Interests: Declaration of Competing Interest All authors have no conflicts of interest., (Copyright © 2022 Elsevier Inc. All rights reserved.)
- Published
- 2023
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