Solubility of N-ethylcarbazole in ethanol+petroleum ether mixtures at various temperatures

Wenge Yang,Keyi Wu,Yong-Hong Hu,Tuan Zhang,Qirun Guo,Shouhai Yang,Ying Shi 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.6

The solubility of N-ethylcarbazole in (ethanol+petroleum ether) binary solvent mixtures was measured with the temperature changing from 280.15 K to 316.15 K. The experimental data matched the solvent/Redlich-Kister (CNIBS/R-K) equation and the Jouyban-Acree equation. Computational results showed the CNIBS/R-K equation was more suitable than the Jouyban-Acree equation. The solution process in the thermodynamic properties, including the Gibbs energy, enthalpy, and entropy, was calculated by the van’t Hoff analysis.

Characterization of the B cell receptor repertoire of patients with acute coronary syndrome

Weng Ruiqiang,Liu Sudong,Gu Xiaodong,Zhong Zhixiong 한국유전학회 2022 Genes & Genomics Vol.44 No.1

Background: Acute coronary syndrome (ACS) is a complex cardiovascular disease whose development involves the dysregulation of adaptive immune responses. Though it has been proven that T cells associate with inflammation in the development of ACS, the function of B cells in disease remains unclear. Objective: The aim of this study was to reveal the diversity of the B cell receptor (BCR) repertoire of patients with ACS. Methods: We conducted a pilot study to sequence the immune repertoire of peripheral blood mononuclear cells (PBMCs) from patients with ACS, including acute myocardial infarction (AMI) and unstable angina (UA), and quantitatively characterized BCR repertoires by bioinformatics analysis. Results: We found that patients with AMI and UA had lower BCR repertoire diversity compared with controls with normal coronary arteries (NCA). Lower percentages of productive unique BCR nt sequences and higher percentages of top 200 unique BCR sequences were identified in AMI and UA patients than NCA controls. Patients had various preferential usage of V and J genes from B cell clones in accordance with the disease severity of coronary arteries. AMI patients had distinct CDR3 amino acids, and their frequency differed among patients with ACS. Conclusions: Our results indicate that differential BCR signatures represent an imprint of distinct repertoires among ACS patients. This study thereby opens up the prospect of studying disease-relevant B cells to better understand and treat ACS.

Visualization of Relative Flow Patterns in Centrifugal Blood Pump

Weng Kong Chan,S. C. M Yu,L. P. Chua,Y. W. Wong 대한기계학회 2001 KSME International Journal Vol.15 No.12

A Multi-Domain Web Text Feature Extraction Model for e-Science Environment

Weng Yu 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.11

The traditional information extraction methods based on specific domain usually depend on the domain dictionaries to discover the text feature. It is inconvenient for reproducing and difficult to transplant in multi-domain environment. The application scope is limited seriously. Oriented to the deficiencies above, a multi-domain web text feature extraction model for e-Science is proposed (named e-FTM). This model adopts the Chinese split words technology without dictionary into the process of multi-domain text feature discovery and avoids the dependency of domain dictionaries effectively. With the help of classification of common and individual features, the model tracks the generation and the development trend of domain events dynamically, and forms a couple of local data centers eventually. Through cooperative scheduling the domain knowledge between different local data centers, the knowledge utilization efficiency of the domain information in the global scope is improved sharply. To validate the performance, the experiments on the multi-domain text feature extraction, topic features dynamical tracking and the domain knowledge cooperative scheduling demonstrate that the model has higher application validity and practicality in e-Science environment.

Ternary organic solar cells based on two compatible PDI-based acceptors with an enhanced power conversion efficiency

Weng, Kangkang,Li, Chao,Bi, Pengqing,Ryu, Hwa Sook,Guo, Yikun,Hao, Xiaotao,Zhao, Dahui,Li, Weiwei,Woo, Han Young,Sun, Yanming The Royal Society of Chemistry 2019 Journal of Materials Chemistry A Vol.7 No.8

<P>Ternary solar cells have been proven to be an effective way to increase the power conversion efficiency (PCE) of organic solar cells (OSCs). Up to now, research effort has mostly focused on fullerene derivatives and acceptor-donor-acceptor (A-D-A) type non-fullerene acceptor-based ternary solar cells, while perylene diimide (PDI)-based ternary devices have been rarely studied. In this contribution, we introduced a new type of ternary solar cell based on a PDI-based small-molecule acceptor (PBI-Por) and a polymer donor (PTB7-Th) with a third PDI-based polymer acceptor (PDI-V). The introduction of PDI-V into the ternary blends not only broadens the absorption of blend films but also increases the electron mobilities. As a result, a high efficiency of 9.43% was obtained for the ternary OSC, which is 20% higher than that of the binary OSC. Detailed studies indicate that PDI-V showed good compatibility with PBI-Por in the blend films, which demonstrates a promising way to fabricate high-performance PDI-based OSCs.</P>

THE CHARACTERISTICS OF ZINC DIFFUSED NORMALLY ON GaAs AND InP JUNCTION FETs

Weng, Tung H. 대한전자공학회 1989 ICVC : International Conference on VLSI and CAD Vol.1 No.1

In this paper, a new technique using semi-sealed quartz bottle for zinc diffusion in GaAs and InP was employed. The basic requirement for zinc diffusion in these materials is to provide an overpressure ambient 50 that decomposition at the diffusion temperature can be avoided. This was done for the case of InP by placing InP wafer with diffusion charge which contained pure zinc and a small amount of InP powder in a semi-sealed bottle. This small amount of InP powder seemed to have provided the needed overpressure ambient to avoid decomposition. TA e surface showed no degradation after diffusion and maintained its original smooth surface. However, the surface was decomposed if no InP powder was added in the diffusion charge. For the case of GaAs, no GaAs powder was needed in the diffusion charge. Only pure zinc was required for producing heavily doped P-layer. The vapor produced by GaAs in the semi-sealed bottle during diffusion seemed to be sufficient to avoid decomposition. This is in sharp contrast to the behavior of zinc diffusion in InP using the same technique The detailed characteristics of the diffused layer of InP are presented. Similar characteristics for GaAs were also obtained. Junction field effect transistors were fabricated using the P layer formed by semi-sealed diffusion for both InP and GaAs. For InP junction FETs the measured transconductance varies from 80 to 100 ms/mm gate length. GaAs junction FETs show similar results with well behaved I-V characteristics.

Studies on the Optimum Models of the Dairy Product Kou Woan Lao Using Response Surface Methodology

Weng, Wei-Lien,Liu, Vi-Chung,Lin, Chin-Wen Asian Australasian Association of Animal Productio 2001 Animal Bioscience Vol.14 No.10

Kou Woan Lao is an oriental-style dairy product, which is coagulated by milk-clotting enzyme from the culture filtrate of lao-chao. The product appears smooth, sweet, slightly wine flavour, and the flavour differs from yogurt. The aim of this study was to search for the optimum model to shorten the period of manufacture, and to improve the quality of Kou Woan Lao. A response surface design was used for studying the effects of addition of carrageenan, locust bean gum, and culture filtrate from lao-chao on the curd firmness, viscosity, and syneresis. Results indicated that the best rheological property, preservative quality and acceptability of Kou Woan Lao could be obtained by the combination of 0.22% carrageenan, 0.21 % locust bean gum and 12% culture filtrate from lao-chao. The curd firmness, viscosity and syneresis of resultant product were 29.3 g, 21,347.7 cps, and 8.92%, respectively and the microstructure of the curd revealed a relatively complete three-dimensional spider web-like structure.

A Service Pipelining Model for Web GIS Based on Distributed Environment

Weng Yu,Cheng WenYi 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.6

Pipeline is one of the classic technologies to enhance efficiency. When the amount of data is becoming more and more big when processing, it becomes a big problem that how to improve the efficiency with existing resources. In the meantime, a large number of older hardware and software feel difficult to deal with new task in new environment with the accumulation of time. In order to ameliorate efficiency of web GIS with low cost, this paper propose a service pipelining model for Web GIS based on distributed environment. The system build a basic service library to reuse plenty of existing resource, and design a segment system to organize pipeline in level of service to improve efficiency. The model can be used in many platforms and occasions, not limited to the application we proposed in this paper. The model we proposed has been proved work well in our experiments and test.

Roles of Formal Institutions and Social Capital in Innovation Activities: A Cross-Country Analysis

Weng Chang Lee,Siong Hook Law 연세대학교 동서문제연구원 2017 Global economic review Vol.46 No.3

This paper investigates the roles of formal institutions and social capital in countries’ innovation activities. The sample consists of 62 developed and developing countries, using the ordinary least squares robust standard error estimations, instrumental variable (IV) estimators, and quantile regression. The empirical results indicate that formal institutions and social capital complement one another in influencing countries’ innovations level. In terms of the relative importance of both in promoting innovation activities, the social capital has greater role compared to formal institutions. Furthermore, the empirical result suggests that innovation level tends to be higher in countries with higher social capital. We also use the quantile regression to estimate whether the relationship among formal institutions, social capital, and innovation differs at different points in the conditional distribution of innovation. The results demonstrate that formal institutions yield a significant positive impact only after exceeding in 50th quantile, whereas social capital do so at lower 10th quantile. Therefore, in addition to a policy focus on improving the formal institutions, countries with a low level of innovation should enrich social capital in their promotion of innovation activity.

Effect of Individual, Group or ESF Housing in Pregnancy and Individual or Group Housing in Lactation on Sow Behavior

Weng, R.C.,Edwards, S.A.,Hsia, L.C. Asian Australasian Association of Animal Productio 2009 Animal Bioscience Vol.22 No.11

To evaluate the effect of different housing systems on sow behavior, 80 gilts were randomly allocated at puberty to four treatments: i) sow stall in gestation followed by farrowing crate (SC), ii) group housing with individual feeding in gestation followed by farrowing crate (GC), iii) ESF (Electronic Sow Feeding) system in gestation followed by farrowing crate (EC), and iv) ESF system followed by group farrowing pen (EG). Behavioral observations were carried out on a total of 16 animals per treatment at the following stages: first day of allocation to housing treatment, day of service, 80 days after service, 109 days after service on entry to farrowing accommodation, 24 h before farrowing, day of farrowing, 14, 27 and 28 days after farrowing, at weaning. On each occasion, individual animals were observed for a 24 period with one minute time sampling. There were significant differences (p<0.001) between stages of the reproductive cycle for all the behavior patterns in all treatments. On the first day in experimental housing treatments, sows spent more time rooting and dog-sitting. Activity and investigatory behavior decreased as pregnancy progressed. An activity peak was apparent just before farrowing, followed by a high level of inactivity on the day of farrowing. Time spent active, eating and drinking increased as lactation progressed, and greatest activity and locomotion was seen immediately following weaning. There were significant differences between housing treatments (p<0.01) for standing, moving, eating, drinking, dog-sitting and lying. During pregnancy SC sows spent more time standing, rooting, drinking and dog sitting, while EC sows spent less time rooting and drinking and more time lying. During lactation, GC sows spent more time standing, moving and eating, less time dog sitting and lateral lying. Nursing frequency was reduced in GC sows (p<0.001). The maternal and piglet behaviors were influenced strongly by environment during lactation. However, it was also shown that previous housing history can influence the maternal behavior in the pre-farrowing stage and during early lactation.