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124 results on '"Tan, Y.L."'

1. On B(5,20) 2-Groups.

Author

Alhassan, E.A., Tan, Y.L., and Li, Y.

Subjects
*FINITE groups
Abstract

A finite group G is said to be a B (n , k) group if for any n -element subset { a 1 , ... , a n } of G , | { a i a j   |   1 ≤ i , j ≤ n } | ≤ k. It is of interest to characterize the structure of B (n , k) groups for n (n + 1) / 2 ≤ k ≤ n 2 − 1. The B (5 , k) groups for 15 ≤ k ≤ 19 have been investigated by several authors. In this paper, we give a complete characterization of B (5 , 20) 2-groups by showing there are five classes of such groups which are nontrivial and nonabelian. [ABSTRACT FROM AUTHOR]

Published
2024
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11. Genetic analysis of fertility revertants identified in rice CMS populations

Author

Wen, J.C., Huang, D.J., Tan, Y.L., Wang, S.H., and Tan, X.L.

Subjects
Rice -- Research, Rice -- Genetic aspects, Plant breeding -- Research, Agricultural industry, Business
Abstract

The contamination of cytoplasmic male sterile (CMS) populations by fertile plants (FPs), which reduces purity of hybrid seeds, is a common problem in hybrid seed production, but genetic characterization of FPs has not been undertaken in rice (Oryza sativa L.). In this study, two types of FPs were identified among 64,530 plants of three CMS lines of Dian type 1 (CMS-D1), in which the CMS seeds were produced under strict isolation. One type of FP had a genetic background identical to that of the CMS maintainers, which was revealed by 169 simple sequence repeat (SSR) markers and nine morphological traits. This type of FP was found at a frequency of 0.0418% in the CMS populations. These FPs could have resulted from maintainer contamination. Another type was a fertility revertant (FR), occurring at a frequency of 0.0155% in the CMS population. Although the FRs did not show differences from the corresponding CMS lines in morphological traits and the SSR markers, they possessed a fertility restoring gene of heterozygous type, which acted in gametophytic mode on pollen fertility restoration of the hybrids. The gene was designated temporarily as Rfr(d1). Rfr(d1) was allelic to the fertility restoring gene carried by CMS-D1 restorers, and it was located at the Rf-1 locus, which was revealed by allelic testing and cleaved amplified polymorphism sequence markers located within the Rf-1 Iocus. Fertility revertants could be generated spontaneously through reversion of CMS lines. doi: 10.2135/cropsci2008.12.0722

Published
2010

12. Powered Air Purifying Respirator (PAPR) restores the N95 face mask induced cerebral hemodynamic alterations among Healthcare Workers during COVID-19 Outbreak

Author

Bharatendu, C. Ong, J.J.Y. Goh, Y. Tan, B.Y.Q. Chan, A.C.Y. Tang, J.Z.Y. Leow, A.S. Chin, A. Sooi, K.W.X. Tan, Y.L. Hong, C.S. Chin, B.Z. Ng, E. Foong, T.W. Teoh, H.L. Ong, S.T. Lee, P. Khoo, D. Tsivgoulis, G. Alexandrov, A.V. Sharma, V.K.

Abstract

Background and aim: COVID-19 pandemic has resulted in an unprecedented increased usage of Personal protective equipment (PPE) by healthcare-workers. PPE usage causes headache in majority of users. We evaluated changes in cerebral hemodynamics among healthcare-workers using PPE. Methods: Frontline healthcare-workers donning PPE at our tertiary center were included. Demographics, co-morbidities and blood-pressure were recorded. Transcranial Doppler (TCD) monitoring of middle cerebral artery was performed with 2-MHz probe. Mean flow velocity (MFV) and pulsatility index (PI) were recorded at baseline, after donning N95 respirator-mask, and after donning powered air-purifying respirator (PAPR), when indicated. End-tidal carbon-dioxide (ET-CO2) pressure was recorded for participants donning PAPR in addition to the N95 respirator-mask. Results: A total of 154 healthcare-workers (mean age 29 ± 12 years, 67% women) were included. Migraine was the commonest co-morbidity in 38 (25%) individuals while 123 (80%) developed de-novo headache due to N95 mask. Donning of N95 respirator-mask resulted in significant increase in MFV (4.4 ± 10.4 cm/s, p < 0.001) and decrease in PI (0.13 ± 0.12; p < 0.001) while ET-CO2 increased by 3.1 ± 1.2 mmHg (p < 0.001). TCD monitoring in 24 (16%) participants donning PAPR and N95 respirator mask together showed normalization of PI, accompanied by normalization of ET-CO2 values within 5-min. Combined use of N95 respirator-mask and PAPR was more comfortable as compared to N95 respirator-mask alone. Conclusion: Use of N95 respirator-mask results in significant alterations in cerebral hemodynamics. However, these effects are mitigated by the use of additional PAPR. We recommend the use of PAPR together with the N95 mask for healthcare-workers doing longer duties in the hospital wards. © 2020 Elsevier B.V.

Published
2020

19. Agent's liability for knowing receipt.

Author

Tan, Y.L.

Subjects
Constructive trusts -- Cases, Commercial agents -- Cases, Selangor United Rubber Estates Ltd. v. Cradock (No. 3) ((1968) 1 W.L.R. 1555 (Ch.)), Karak Rubber Co. v. Burden ((1972) 1 W.L.R. 602 (C.A.))
Published
1991

31. A randomized controlled trial comparing repeat doses of 400 mcg sublingual to buccal misoprostol after mifepristone for termination of pregnancy 13–21 weeks

Author

Dabash, R., primary, Chong, E., additional, Bracken, H., additional, Tsereteli, T., additional, Abrahamyan, R., additional, Hajri, S., additional, Karki, C., additional, Sfar, E., additional, Kurbanbekova, D., additional, Bajracharya, J., additional, Sadikova, D., additional, Shochet, T., additional, Platais, I., additional, Tan, Y.L., additional, Murtagh, C., additional, and Winikoff, B., additional

Published
2017
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37. Taking a leap of faith: Reminders of God lead to greater risk taking

Author

Chan, K.Q., Tong, E.M.W., Tan, Y.L., Chan, K.Q., Tong, E.M.W., and Tan, Y.L.

Abstract

Item does not contain fulltext, Recent psychological models of religion suggest that religious beliefs provide a form of psychological control. Independently, other research has found that an increase in psychological control can lead people to adopt riskier strategies. Hence, we hypothesized that activation of God concepts increases risk taking. In three studies, we found that God primes led to take greater risk taking as though participants were literally taking a leap of faith. In Study 2, we presented evidence that this effect could be mediated by increased psychological control. Although consistent with psychological models of religion, the findings also contradict some survey findings that religious people are less risk seeking. This inconsistency was addressed in Study 3 by looking at how religion, morality, and risk taking are related. Implications to a relational schema approach to study the effects of God primes are discussed.

Published
2014

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