Effect of Ethanol Stress on Fermentation Performance of Saccharomyces cerevisiae Cells Immobilized on Nypa fruticans Leaf Sheath Pieces     

Hoang Phong Nguyen  Hoang Du Le  Van Viet Man Le 《Food Technology and Biotechnology》2015,53(1):96-101

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Temperature-induced droplet coalescence in microchannels     

Xu B  Nguyen NT  Wong TN 《Biomicrofluidics》2012,6(1):12811-128118

This paper reports a technique for temperature-induced merging of droplets in a microchannel. The multiphase system consists of water droplet and oil as the dispersed phase and the carrying continuous phase. A resistive heater provides heating in a rectangular merging chamber. The temperature of the chamber is controlled by the voltage applied to the heater. The merging process of two neighboring droplets was investigated with different applied voltage, flow rate ratio between water and oil and total flowrate. Merging is found to be effective at high flow rate ratio, high temperature, and low total flowrate. The presented technique could be used for merging and mixing in droplet-based lab-on-a-chip platforms.  相似文献   

The effects of a family fitness program on the physical activity and nutrition behaviors of third-grade children     

Hopper CA  Munoz KD  Gruber MB  Nguyen KP 《Research quarterly for exercise and sport》2005,76(2):130-139

This study examined the efficacy of a school-based exercise and nutrition program with a parent component. Third-grade children (N = 238) from six elementary schools participated in the study, with three schools randomly assigned to a program group and the other three schools to a control group. The program group received a health-related fitness school-based program and a home program that required parents and children to complete activities and earn points for nutrition and exercise activities. The control group received their traditional physical education and nutrition education program. Univariate analysis of variance on pre- and posttest scores were completed on the following variables: height, weight, body mass index, skinfold, blood cholesterol, mile run, exercise and nutrition knowledge, calories, protein, carbohydrates, total fat, saturated fat, dietary cholesterol, fiber, sodium, percentage of calories from carbohydrates, and percentage of calories from fat. At pretest, the treatment and control groups did not significantly differ on the measures using schools as the unit of analysis. Girls scored significantly higher than boys on skinfold and pretest knowledge. At posttest, the treatment group scored significantly higher than the control group on exercise and nutrition knowledge and significantly lower than the control group on total fat intake, using schools as the unit of analysis. There was no improvement in physiological measures, including blood cholesterol. The study demonstrated that schools can adjust curriculum to meet some health needs of students and achieve modest changes in exercise and nutrition knowledge and diet. The family component of the program provided a practical approach to improving physical activity and nutrition behaviors for elementary school teachers who teach many participants in a crowded curriculum.  相似文献   

Hormonal responses to exercise after partial sleep deprivation and after a hypnotic drug-induced sleep     

Mougin F  Bourdin H  Simon-Rigaud ML  Nguyen NU  Kantelip JP  Davenne D 《Journal of sports sciences》2001,19(2):89-97

The aim of this study was to determine the hormonal responses, which are dependent on the sleep wake cycle, to strenuous physical exercise. Exercise was performed after different nocturnal regimens: (i) a baseline night preceded by a habituation night; (ii) two nights of partial sleep deprivation caused by a delayed bedtime or by an early awakening; and (iii) two nights of sleep after administration of either a hypnotic compound (10 mg zolpidem) or a placebo. Eight well-trained male endurance athletes with a maximal oxygen uptake of 63.5 +/- 3.8 ml x kg(-1) x min(-1) (mean value +/- s(x)) were selected on the basis of their sleeping habits and their physical training. Polygraphic recordings of EEG showed that both nights with partial sleep loss led to a decrease (P< 0.01) in stage 2 and rapid eye movement sleep. A delayed bedtime also led to a decrease (P < 0.05) in stage 1 sleep. Zolpidem had no effect on the different stages of sleep. During the afternoon after an experimental night, exercise was performed on a cycle ergometer. After a 10-min warm-up, the participants performed 30 min steady-state cycling at 75% VO(2-max) followed by a progressively increased workload until exhaustion. The recovery period lasted 30 min. Plasma growth hormone, prolactin, cortisol, catecholamine and lactate concentrations were measured at rest, during exercise and after recovery. The concentration of plasma growth hormone and catecholamine were not affected by partial sleep deprivation, whereas that of plasma prolactin was higher (P < 0.05) during the trial after an early awakening. Plasma cortisol was lower (P < 0.05) during recovery after both sleep deprivation conditions. Blood lactate was higher (P < 0.05) during submaximal exercise performed after both a delayed bedtime and an early awakening. Zolpidem-induced sleep did not affect the hormonal and metabolic responses to subsequent exercise. Our results demonstrate only minor alterations in the hormonal responses to exercise after partial sleep deprivation.  相似文献   

Improvement of rectification effects in diffuser/nozzle structures with viscoelastic fluids     

Nam-Trung Nguyen  Yee-Cheong Lam  Soon-Seng Ho    Cassandra Lee-Ngo Low 《Biomicrofluidics》2008,2(3)

This paper reports the improvement of rectification effects in diffuser∕nozzle structures with viscoelastic fluids. Since rectification in a diffuser∕nozzle structure with Newtonian fluids is caused by inertial effects, micropumps based on this concept require a relatively high Reynolds numbers and high pumping frequencies. In applications with relatively low Reynolds numbers, anisotropic behavior can be achieved with viscoelastic effects. In our investigations, a solution of dilute polyethylene oxide was used as the viscoelastic fluid. A microfluidic device was fabricated in silicon using deep reactive ion etching. The microfluidic device consists of access ports for pressure measurement, and a series of ten diffuser∕nozzle structures. Measurements were carried out for diffuser∕nozzle structures with opening angles ranging from 15° to 60°. Flow visualization, pressure drop and diodicity of de-ionized water and the viscoelastic fluid were compared and discussed. The improvement of diodicity promises a simple pumping concept at low Reynolds numbers for lab-on-a-chip applications.  相似文献   

Basic Serials Cataloging Workshop     

Les Hawkins  Hien Nguyen  Stephen Kharfen 《期刊图书馆员》2015,68(1-4):5-16

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Ly Tran,Simon Marginson,Hoang Do,Quyen Do,Truc Le,Nhai Nguyen,Thao Vu,Thach Pham and Huong Nguyen: Higher education in Vietnam: flexibility,mobility and practicality in the global knowledge economy     

Huong Thu Nguyen 《Higher Education》2015,70(5):899-901

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Development and use of an instrument to measure students’ perceptions of a business statistics learning environment in higher education     

Thuyuyen H. Nguyen  Michael Newby  Panayiotis G. Skordi 《Learning Environments Research》2015,18(3):409-424

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Linear and orthogonal models of acculturation and its relations to cultural variables: An examination of the Suinn-Lew Asian Self-Identity Acculturation Scale (SL-ASIA)     

Tam K. Dao  Andra L. TetenQuang Nguyen 《Int J Intercult Relat》2011,35(1):61-68

The Suinn-Lew Asian Self-Identity Acculturation Scale (SL-ASIA) is the most widely used measure of acculturation for Asians. The purpose of the current study was twofold: First, the study explored the consistency of the SL-ASIA in characterizing Asian American men's level of acculturation - Asian-Identified, Western-Identified, Bicultural - using the items of the scale in orthogonal versus linear approaches. Second, the study examined the association between the two scoring methods and characteristics indicative of Asian culture—family allocentrism, loss of face, and affect intensity. An orthogonal approach suggests individuals may identify both with Asian and Western cultures, whereas a linear approach indicates an individual identifies with one culture at the expense of the other (e.g., high Asian, low Western identified). We examined the classification rates of these two methods using a large sample of Asian-American collegiate men (n = 521) and then within each ethnic subgroup of Asian men (e.g., Chinese, Japanese, Korean). Results suggested the two methods of characterizing men consistently diverged. Across the Asian subgroups, the overall agreement rates using linear and orthogonal methods were approximately at chance. Furthermore, significant correlations were observed among acculturation scoring methods and variables indicative of social integrity and family attitude. The implications for these findings and potential future directions for the study of acculturation are discussed.  相似文献   

Love acts and revolutionary praxis: challenging the neoliberal university through a teaching scholars development program     

Reem Al-Mahmood  Gerardo Papalia  Sinead Barry  Minh Nguyet Nguyen  Juliane Roemhild  Terri Meehan-Andrews 《高等教育研究与发展》2020,39(1):81-98

ABSTRACT

There has been significant interest in developing academics through Teaching Scholar Development Programs across the USA, Canada, the UK, and more recently in Australia. At their core, such programs develop academics across teaching scholarship, leadership, promotion, and award opportunities, where universities reap the benefits of developing such a cadre of leaders. This paper pays witness to one such a program in an Australian university to highlight enactments of caring passionately. We use qualitative survey evaluation data, metaphor analysis and reflective practice to nuance the pleasures, passions and challenges of the lived experiences using phenomenological and metaphor lenses to describe our experiences. Metaphors provide powerful insights into the dimensions of experience as they open up how programs are perceived and experienced. Our paper disrupts traditional linear writing through rhizomatic, multivocal and multitextual encounters to challenge dominant authorial voicing. The academic identity work and emotional work required in the program is unfolded through evolving, experiencing and reflecting on the program to inform design and highlight what we have come to (re)value in our academic work when we come together to learn, share, and lead. We forge ways to be and become with and against neoliberal agendas that have choked the soul of ‘the university’ to evolve rich spaces and practices of/for reciprocity and kindness where not only learning can thrive, but where love acts – a much needed revolutionary praxis for our time.  相似文献