Antibiotic susceptibility test based on the dielectrophoretic behavior of elongated Escherichia coli with cephalexin treatment     

Chung CC  Cheng IF  Yang WH  Chang HC 《Biomicrofluidics》2011,5(2):21102

This study reports the use of dielectrophoresis (DEP), which determined the crossover frequency (cof) of antibiotic-induced elongation of Escherichia coli (E. coli) with regard to the rapid antibiotic susceptibility test (AST). Different dielectric properties and elongation rates of E. coli are caused by various concentrations of cephalexin treatment. According to the authors' results, significant changes in the cof of bacteria treated with 32 μg∕ml antibiotic for 60 min can be found by using a quadruple electrode array, and the results of DEP-based AST correspond with that of agar dilution method. Utilizing this approach could greatly reduce the period of bacteria growth, and obtain the minimum inhibition concentration of E. coli to cephalexin.  相似文献   

An accurate analytical formula for the essential joint probability of framed slotted aloha protocols     

In-Hang Chung  Ming-Ching Yen  Chi-Kuang Hwang 《Journal of The Franklin Institute》2013,350(10):3432-3440

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Effects of an acute bout of exercise on serum soluble leptin receptor (sOB-R) levels     

Chung Bing Yang  Chung-Chief Chuang  Chung Sen Kuo  Chin Hsing Hsu 《Journal of sports sciences》2013,31(5):446-451

Abstract

We investigated the effects of an acute bout of exercise on serum soluble leptin receptor (sOB-R) concentrations. Eighteen male participants completed two different exercise sessions with intensities of 25% and 65% maximal aerobic capacity (VO₂max). In addition to the energy expenditure during exercise sessions being measured, blood samples were collected before exercise, and immediately, at 24 h, and at 48 h post-exercise to analyse sOB-R, leptin and insulin levels. At 24 h post-exercise, sOB-R and leptin concentrations at the 65% VO₂max were significantly different from those at the 25% VO₂max. Leptin levels at 48 h post-exercise were also significantly lower for the 65% VO₂max than for the 25% VO₂max (P < 0.01). In the 65% VO₂max session, the energy expenditure during exercise was significantly associated with leptin concentrations at 24 h and 48 h and sOB-R concentrations at 24 h post-exercise. However, no correlations were found between sOB-R and leptin at the three post-exercise time points. In conclusion, an acute bout of exercise with 920 kcal of output resulted in an increase in sOB-R levels at 24 h post-exercise. However, the changes in sOB-R levels due to an acute bout of exercise might not contribute to the delayed decrease observed for leptin.  相似文献   

Psychometric properties of the Brunel Mood Scale in Chinese adolescents and adults     

Chun-Qing Zhang  Pak-Kwong Chung  Mengmeng Du  Peter C. Terry 《Journal of sports sciences》2013,31(15):1465-1476

Abstract

Building on the work of Terry and colleagues (Terry, P. C., Lane, A. M., Lane, H. J., & Keohane, L. (1999). Development and validation of a mood measure for adolescents. Journal of Sports Sciences, 17, 861–872; Terry, P. C., Lane, A. M., & Fogarty, G. J. (2003). Construct validity of the Profile of Mood States-Adolescents for use with adults. Psychology of Sport & Exercise, 4, 125–139.), the present study examined the validity and internal consistency reliability of the Chinese version of the Brunel Mood Scale (BRUMS-C) among 2,548 participants, comprising adolescent athletes (n = 520), adult athletes (n = 434), adolescent students (n = 673), and adult students (n = 921). Both adolescent and adult athletes completed the BRUMS-C before, during, or after regular training and both adolescent and adult students completed the BRUMS-C in a classroom setting. Confirmatory factor analyses (CFAs) provided support for the factorial validity of a 23-item six-factor model, with one item removed from the hypothesised measurement model. Internal consistency reliabilities were satisfactory for all subscales across each of the four samples. Criterion validity was supported with strong relationships between the BRUMS-C, abbreviated POMS, and Chinese Affect Scale consistent with theoretical predictions. Multi-sample CFAs showed the BRUMS-C to be invariant at the configural, metric, strong, and structural levels for all samples. Furthermore, latent mean difference analyses showed that athletes reported significantly higher levels of fatigue than students while maintaining almost the same levels of vigour, and adolescent students reported significantly higher levels of depressed mood than the other three samples.  相似文献   

Theorizing difference and difficulty: “wreading” Asian American poetics in South Korea*     

Eun-Gwi Chung 《Inter-Asia Cultural Studies》2019,20(4):552-563

ABSTRACT

Reflecting on a personal experience teaching and studying Asian American poetry in South Korea, this paper examines how and why Asian American poetry in South Korea has been marginalized in the academia and argues that Asian American poetry needs to be newly dealt as a frontier that vigorously experiments the role of cultural poetics and humanities in and out of the university programs. The reception of Asian American poets and their poetry in South Korea is inseparable from the interpellation and understanding of Asian Americans as subject. This essay, rather than inscribing Anglo American critical frame that has focused on the reductive reading of essentializing racial traits and minority identities, tries to build a platform for inviting inter/cross-cultural thinking under the umbrella of poetry reading. Through the process of “wreading” Asian American poetry, I argue that difficulty and difference can be reinterpreted as practical monitors for alternative reading of Asian American poetry against the grain of the white Anglican national self of America.  相似文献   

Enhancing polyphenol extraction from unripe apples by carbohydrate-hydrolyzing enzymes     

Hu-zhe Zheng  In-Wook Hwang  Shin-Kyo Chung 《Journal of Zhejiang University. Science. B》2009,10(12):912-919

The effects of process variables such as enzyme types, enzyme ratio, reaction temperature, pH, time, and ethanol concentration on the extraction of unripe apple polyphenol were investigated. The results indicated that Viscozyme L had the strongest effect on polyphenols extraction and was selected to study the polyphenol composition. The ratio of enzyme (Viscozyme L) to substrate (2 fungal beta-glucanase units (FBG)) at 0.02, reaction at pH 3.7,50 ℃ for 12 h, and ethanol concentration of 70% were chosen as the most favorable extraction condition. Total phenolic content (TPC), reducing sugar content (RSC), and extraction yield increased by about 3,1.5, and 2 times, respectively, compared with control. The contents of p-coumaric acid, ferulic acid, and caffeic acid increased to 8,4, and 32 times, respectively. The enzyme-aided polyphenol extraction process from unripe apples might be applied to food industry for enhancing bioactive compound production.  相似文献   

Gender differences in instrumental learning among secondary school students in Hong Kong     

Wai‐Chung Ho 《Gender and education》2009,21(4):405-422

This paper examines the extent of gender differences, and discusses the role of gender in musical instrument learning. It focuses on the collective instrumental experiences of 1493 Chinese students (774 boys and 719 girls attending grades 7–13) within Western and non‐Western musical traditions in Hong Kong. The discussion draws attention to gender differences in the learning of Chinese and Western musical instruments, in musical interest and instrumental learning, and in the reasons why students learn or do not learn musical instruments. The paper argues that, while female and male students exhibit different attitudes towards the types of instruments learnt, significant correlations exist between their interest in music and parental support for their instrumental learning. Gender is brought to the fore by the pedagogical actions of the teacher, the mass media and by parental efforts to reduce gender bias and stereotypes through school, public and family education.  相似文献   

香港科技大学实验室安全管理系统   总被引：11，自引：5，他引：6  

关继祖  俞宗岱 《实验技术与管理》2009,26(10)

建立有效的实验室安全管理系统,需要校方提供多方面的配套,如行政、人事、技术、资源等支持.此外,各职别在安全管理的权责要清晰,安全指引要详尽及明确,各项安全服务要周详并有效率,系统效果要定期监察,并要持续改进,才能建立实验室安全文化.  相似文献   

Myth of the Inferior Status of Vocational Education: The Case of Hong Kong     

Thomas Siu Ho Yau  Ming Lun Chung  Ho Ching Li  Derek Wai Sun Chun 《Chinese Education & Society》2018,51(6):476-490

Abstract

In this article, factors contributing to the poor perceptions and inferior status of vocational education in Hong Kong are discussed. Critical discourse analysis (CDA) is employed as the methodology in examining the discursive construction of vocational education in the policy context. A total of five policy documents published between 1970 and 2015 are included. Our findings show that the socioeconomic transformation of Hong Kong in recent decades, massification of higher education, and cultural factors such as parental expectations are pertinent to the stigmatization observed in vocational education. This article discusses the implications from the findings and concludes with possible solutions for the future development of vocational education in Hong Kong under the novel vocational and professional education and training (VPET) initiative launched by the government.  相似文献   

An exact closed-form formula of collision probability in diverse multiple access communication systems with frame slotted aloha protocol     

Kun-Shu Huang  Chi-Kuang Hwang  Bore-Kuen Lee  In-Hang Chung 《Journal of The Franklin Institute》2017,354(13):5739-5752

For diverse multiple access communication systems based on frame slotted aloha (FSA) protocol, it is important to analyze collision probability for the system performance evaluation. As shown in the literature, for general settings, it is difficult to derive an exact and closed-form solution for collision probability without approximation. Recently, an exact solution based on generic analytical approach (GAA) [31] has been proposed, yet its numerical computation will become difficult when the number of slots is larger than 16. In this paper, we develop an exact closed-form formula (ECFF) for collision probability that can not only overcome the computational deficiency of GAA in the presence of a large number of slots, but also reduce the computation complexity of collision probability. Surprisingly, by introducing a differentiation operator to form a hybrid recursive equation and applying various algebraic properties of Laplace transform and Z transform, the final collision probability can be represented by a compact double summation. Accuracy of the ECFF and comparison with the GAA have been studied by Monte Carlo simulation.  相似文献