10 results on '"Teo CJ"'
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2. Industrial circular water use practices through the application of a conceptual water efficiency framework in the process industry.
- Author
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Karkou E, Teo CJ, Savvakis N, Poinapen J, and Arampatzis G
- Subjects
- Industry, Water, Water Supply, Water Purification methods, Wastewater, Waste Disposal, Fluid methods
- Abstract
Increased industrial water demand and resource depletion require the incorporation of sustainable and efficient water and wastewater management solutions in the industrial sector. Conventional and advanced treatment technologies, closed-water loops at different levels from an industrial process to collaborative networks among industries within the same or another sector and digital tools and services facilitate the materialization of circular water use practices. To this end, the scope of this paper is the application of the Conceptual Water Efficiency Framework (CWEF), which has been developed within the AquaSPICE project aspiring to enhance water circularity within industries in a holistic way. Four water-intensive process industries (two chemical industries, one oil refinery plant and one meat production plant) are examined, revealing its adaptability, versatility and flexibility according to the requirements of each use case. It is evident that the synergy of process, circular and digital innovations can promote sustainability, contribute to water conservation in the industry, elaborating a compact approach to be replicated from other industries., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: George Arampatzis reports financial support, article publishing charges, and travel were provided by H2020-AquaSPICE project (European Commission, CE-SPIRE-07-2020, Horizon, 2020). Efthalia Karkou reports a relationship with Technical University of Crete that includes: employment. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
3. An innovative model of delivering cancer care in the community: the experience of a tertiary cancer centre in Singapore.
- Author
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Wong RSJ, Ow SGW, Lee YM, Tan B, Teo CJ, Saw XS, and Lee SC
- Subjects
- Humans, Singapore, Delivery of Health Care, Cancer Care Facilities organization & administration, Neoplasms therapy, Tertiary Care Centers organization & administration
- Abstract
Background: Cancer care has evolved rapidly, increasing the demand on healthcare resources. While many non-oral cancer treatments are administered in the hospital, not all necessitate complex medical care. Treatments that can be administered subcutaneously, intramuscularly, or as short intravenous infusions with a low risk of extravasation can be safely administered in the community., Patients and Methods: Since 2017, the National University Cancer Institute, Singapore (NCIS) has operated a program called NCIS on-the-go (NOTG) comprising a network of community cancer treatment clinics located within 20 km of the hospital. NOTG provides 17 low-risk treatments and nursing services run by oncology-trained nurses without on-site physicians. Patients who receive their first dose of cancer treatment uneventfully in the cancer centre can opt-in to receive subsequent doses at any NOTG clinic., Results: Treatment at NOTG has become more mainstream over the years, with its workload increasing by over sevenfold since 2017, and is now responsible for ∼10% of the total main cancer centre workload. The program is sustainable and financially viable to operate. A survey of 155 patients revealed a 96.8% user satisfaction rate, with the majority reporting tangible savings in travelling time, waiting time, and travelling costs. The diversion of low-risk treatments to NOTG has indirectly increased capacity and reduced waiting times at the main cancer centre for patients requiring complex cancer treatments, resulting in a win-win situation., Conclusions: NOTG represents an innovative model of care to deliver low-risk cancer treatments safely in the community and can be easily replicated in other countries., (Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
4. Assessment of genetic diversity and population structure of oil palm (Elaeis guineensis Jacq.) field genebank: A step towards molecular-assisted germplasm conservation.
- Author
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Gan ST, Teo CJ, Manirasa S, Wong WC, and Wong CK
- Subjects
- Conservation of Natural Resources methods, Bayes Theorem, Genetics, Population, Alleles, Palm Oil, Nigeria, Phylogeny, Arecaceae genetics, Genetic Variation, Microsatellite Repeats genetics, Seed Bank
- Abstract
Oil palm (Elaeis guineensis) germplasm is exclusively maintained as ex situ living collections in the field for genetic conservation and evaluation. However, this is not for long term and the maintenance of field genebanks is expensive and challenging. Large area of land is required and the germplasms are exposed to extreme weather conditions and casualty from pests and diseases. By using 107 SSR markers, this study aimed to examine the genetic diversity and relatedness of 186 palms from a Nigerian-based oil palm germplasm and to identify core collection for conservation. On average, 8.67 alleles per SSR locus were scored with average effective number of alleles per population ranging from 1.96 to 3.34 and private alleles were detected in all populations. Mean expected heterozygosity was 0.576 ranging from 0.437 to 0.661 and the Wright's fixation index calculated was -0.110. Overall moderate genetic differentiation among populations was detected (mean pairwise population FST = 0.120, gene flow Nm = 1.117 and Nei's genetic distance = 0.466) and this was further confirmed by AMOVA analysis. UPGMA dendogram and Bayesian structure analysis concomitantly clustered the 12 populations into eight genetic groups. The best core collection assembled by Core Hunter ver. 3.2.1 consisted of 58 palms accounting for 31.2% of the original population, which was a smaller core set than using PowerCore 1.0. This core set attained perfect allelic coverage with good representation, high genetic distance between entries, and maintained genetic diversity and structure of the germplasm. This study reported the first molecular characterization and validation of core collections for oil palm field genebank. The established core collection via molecular approach, which captures maximum genetic diversity with minimum redundancy, would allow effective use of genetic resources for introgression and for sustainable oil palm germplasm conservation. The way forward to efficiently conserve the field genebanks into next generation without losing their diversity was further discussed., Competing Interests: The authors, STG, CJT, SM, WCW and CKW, are employed under Advanced Agriecological Research Sdn. Bhd. (AAR) and the research is funded by AAR. This does not alter our adherence to PLOS ONE policies on sharing data and materials.
- Published
- 2021
- Full Text
- View/download PDF
5. Computer modelling of heat strain responses of exercising personnel in tropical climate.
- Author
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Tan AP, Cheong CH, Lee T, Seng KY, and Teo CJ
- Subjects
- Body Temperature, Body Temperature Regulation, Computers, Exercise, Hot Temperature, Tropical Climate
- Abstract
Physiologically based thermoregulatory models are useful for deriving predictions of heat strain for pragmatic applications such as planning of continuous exercise/work-rest protocols. The SCENARIO model is an example of a thermoregulatory model that predicts heat strain including body core temperature (Tc) from individual characteristics, physical activity, clothing properties and environmental conditions. This paper presents work to optimize and enhance the SCENARIO model for prediction of Tc during high intensity load carriage tasks under predominantly tropical climate conditions. Data for model optimization (in-sample analysis) and model external validation were derived from four and two load carriage studies respectively. A total of four parameters characterizing metabolic heat production, sweat evaporation and ice ingestion for hydration were identified for model optimization based on physiological reasoning. The accuracy of Tc estimates was evaluated based on bias, root mean square deviation (RMSD), RMSD based on mean values (RMSD-Mean), and standard deviation fall-in percentage (SDP). Under in-sample analysis, the optimized model achieved bias, RMSD, RMSD-Mean and SDP of 0.01°C, 0.39°C, 0.14°C and 99%, respectively. When externally validated against two sets of unseen data, the model achieved comparable bias, RMSD, RMSD-Mean and SDP values of 0.06°C, 0.32°C, 0.13°C, 92% and 0.08°C, 0.39°C, 0.19°C, 92%, respectively. Overall, the results indicate the robustness of the optimized SCENARIO model for predicting the Tc responses during prolonged, high-intensity physical tasks under hot and humid environments. Future work to further validate the model against data beyond the range of the present study's experimental data and enhancing it for more accurate simulations of other heat strain markers including heart rate is recommended., (Copyright © 2021 Elsevier Ltd. All rights reserved.)
- Published
- 2021
- Full Text
- View/download PDF
6. Potato Tuber Induction is Regulated by Interactions Between Components of a Tuberigen Complex.
- Author
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Teo CJ, Takahashi K, Shimizu K, Shimamoto K, and Taoka KI
- Subjects
- 14-3-3 Proteins genetics, 14-3-3 Proteins metabolism, Gene Expression Regulation, Plant, Plant Proteins genetics, Plant Tubers genetics, Protein Binding, Solanum tuberosum genetics, Plant Proteins metabolism, Plant Tubers metabolism, Plant Tubers physiology, Solanum tuberosum metabolism, Solanum tuberosum physiology
- Abstract
Photoperiod-regulated flowering and potato tuber formation involve leaf-produced mobile signals, florigen and tuberigen, respectively. The major protein component of florigen has been identified as the FLOWERING LOCUS T (FT) protein. In rice, an FT-like protein, Heading date 3a (Hd3a), induces flowering by making the florigen activation complex (FAC) through interactions with 14-3-3 and OsFD1, a rice FD-like protein. In potato, StSP6A, an FT-like protein, was identified as a major component of tuberigen. However, the molecular mechanism of how StSP6A triggers tuber formation remains elusive. Here we analyzed the significance of the formation of a complex including StSP6A, 14-3-3 and FD-like proteins in tuberization. Yeast two-hybrid, bimolecular fluorescence complementation and in vitro pull-down assays showed that StSP6A and StFDL1, a potato FD-like protein, interact with St14-3-3s. StSP6A overexpression induced early tuberization in a 14-3-3-dependent manner, and suppression of StFDL1 delayed tuberization. These results strongly suggest that an FAC-like complex, the tuberigen activation complex (TAC), comprised of StSP6A, St14-3-3s and StFDL1, regulates potato tuber formation., (© The Author 2016. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
- Published
- 2017
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7. Brassinosteroid insensitive 1-associated kinase 1 (OsI-BAK1) is associated with grain filling and leaf development in rice.
- Author
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Khew CY, Teo CJ, Chan WS, Wong HL, Namasivayam P, and Ho CL
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- Amino Acid Sequence, Gene Expression Profiling, Gene Expression Regulation, Plant, Molecular Sequence Data, Oryza genetics, Oryza growth & development, Phenotype, Phylogeny, Plant Proteins genetics, Plant Proteins metabolism, Plants, Genetically Modified growth & development, Protein Kinases genetics, Protein Kinases metabolism, RNA Interference, Real-Time Polymerase Chain Reaction, Sequence Alignment, Oryza enzymology, Plant Development genetics, Plant Proteins physiology, Protein Kinases physiology
- Abstract
Brassinosteroid Insensitive 1 (BRI1)-Associated Kinase I (BAK1) has been reported to interact with BRI1 for brassinosteroid (BR) perception and signal transduction that regulate plant growth and development. The aim of this study is to investigate the functions of a rice OsBAK1 homologue, designated as OsI-BAK1, which is highly expressed after heading. Silencing of OsI-BAK1 in rice plants produced a high number of undeveloped green and unfilled grains compared to the untransformed plants. Histological analyses demonstrated that embryos were either absent or retarded in their development in these unfilled rice grains of OsI-BAK1 RNAi plants. Down regulation of OsI-BAK1 caused a reduction in cell number and enlargement in leaf bulliform cells. Furthermore, transgenic rice plants overexpressing OsI-BAK1 were demonstrated to have corrugated and twisted leaves probably due to increased cell number that caused abnormal bulliform cell structure which were enlarged and plugged deep into leaf epidermis. The current findings suggest that OsI-BAK1 may play an important role in the developmental processes of rice grain filling and leaf cell including the bulliform cells., (Copyright © 2015 Elsevier GmbH. All rights reserved.)
- Published
- 2015
- Full Text
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8. Laser-induced onset of electrospinning.
- Author
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Sahay R, Teo CJ, and Thoroddsen ST
- Abstract
We present a method to start electrospinning from a polymeric drop. This method uses a pulsed laser which is focused inside the drop close to the liquid surface. The pulse cavitates the liquid and produces a protrusion from the tip of the drop. The protrusion narrows by drainage and vertical stretching, thus concentrating the electric field and increasing the charge density until it overcomes the surface tension and produces the electrified jet. This approach can reduce the required value of applied electric field to half of its value required to start convectional electrospinning from a stationary drop.
- Published
- 2010
- Full Text
- View/download PDF
9. Seroprevalence of hepatitis B and C viral markers in patients with primary hepatocellular carcinoma in Singapore.
- Author
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Khin LW, Teo CJ, and Guan R
- Subjects
- Adult, Aged, Biomarkers analysis, Biomarkers blood, Carcinoma, Hepatocellular etiology, Female, Hepatitis B complications, Hepatitis B Surface Antigens analysis, Hepatitis C complications, Hepatitis C Antibodies analysis, Humans, Immunoenzyme Techniques, Incidence, Liver Neoplasms etiology, Male, Middle Aged, Reference Values, Serologic Tests, Singapore, Carcinoma, Hepatocellular immunology, Hepatitis B immunology, Hepatitis B Surface Antigens blood, Hepatitis C immunology, Hepatitis C Antibodies blood, Liver Neoplasms immunology
- Abstract
The prevalence of hepatitis B and C serological markers were studied in 55 patients (45 males and 10 females) with primary hepatocellular carcinoma (PHC). Their ages ranged from 28 years to 79 years (mean age: 56 years). Fifty-five other patients with non-hepatic diseases were used as age and sex matched controls. Forty-one PHC patients (74%) had chronic hepatitis B infection alone, 5 patients (9%) had chronic hepatitis C infection alone, 6 patients (11%) had chronic hepatitis B and C co-infection, 2 patients (4%) had evidence of previous exposure to HBV and one patient (2%) had no hepatitis B and C serological markers. Among those patients with chronic HBV infection alone, the commonest serological pattern was HBsAg and anti-HBe positive (66%; 27/41) followed by HBsAg and HBeAg positive (i.e. highly HBV infectious group) (24%; 10/41). All the positivity rate for HBsAg (including co-infection with HBV and HCV) was 85% and all the positivity rate for anti-HCV (including co-infection with HBV and HCV) was 20%. In the control group, positivity rate for HBsAg was 13%(7/55). None of the control sera was positive for anti-HCV. Positivity rates for HBsAg and anti-HCV were significantly higher in the 55 PHC cases than in controls. The odds ratio for HBsAg was 40.3 (p value: < 0.001) (95% CI limits: 12.1 to 143.3) and for anti-HCV was indeterminate.
- Published
- 1996
10. Immunogenicity and safety of an inactivated hepatitis A vaccine amongst Singaporeans.
- Author
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Guan R, Ng HS, Fock KM, Ho KY, Yap I, Kang JY, Chow WC, Chew CN, Ng C, and Teo CJ
- Subjects
- Adult, Alanine Transaminase blood, Aspartate Aminotransferases blood, Chi-Square Distribution, Female, Hepatitis A Antibodies, Hepatitis A Vaccines, Hepatitis Antibodies blood, Humans, Immunization Schedule, Male, Singapore, Vaccines, Inactivated adverse effects, Vaccines, Inactivated immunology, Viral Hepatitis Vaccines adverse effects, Viral Hepatitis Vaccines immunology
- Abstract
The immunogenicity and reactogenicity of an inactivated hepatitis A virus (HAV) vaccine was studied in healthy Singaporean adult volunteers. One hundred and forty healthy volunteers with normal alanine (ALT) and aspartate (AST) transaminases and no previous exposure to HAV, received three 1 ml doses (720 ELISA units) of an inactivated HAV vaccine (Smithkline Beechams Biologicals) following a 0, 1, 6 months vaccination schedule. All subjects were asked to record and grade the severity of any reactions for three consecutive days after each dose. Serum ALT and AST as well as anti-HAV were measured at 0, 1, 2, 6 and 7 months after the first vaccine dose. Anti-HAV seroconversion occurred when levels rose above 40 mIU/ml. Eighty-five percent of vaccinees seroconverted after the first innoculation and 99% after the second injection. All vaccinees seroconverted after the third dose. Geometric mean anti-HAV titers (GMTs) were, respectively, 119, 391, 4406 mIU/ml one month after each of the three doses. The most common side effect was transient pain and tenderness at the vaccination site. No elevation of ALT or AST levels were noted during the study period. The inactivated hepatitis A vaccine used in this study is safe and highly immunogenic in the local adult population. Two doses one month apart appeared to give adequate protection.
- Published
- 1995
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