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RISS 인기검색어
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- 저자 : Dawei Ying (검색결과 3 건)
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Dawei Ying,Kai Zhang,Naipeng Li,Xiaoni Ai,Qionglin Liang,Yiming Wang,Guoan Luo 한국바이오칩학회 2012 BioChip Journal Vol.6 No.3
A droplet-based microfluidic device for long-term culture and longitudinal observation of Caenorhabditis eleganswas presented. The worms were encapsulated in W/O droplets and controllably introduced into separate chambers, where the medium/oil or medium/air interface can be manipulated by a gravity -actuated technique, for lifelong culture. This device also contained clamp structures for reversibly immobilization of each worm separately, and thus we were able to track more details about each worm. Several phenotypes of worms were monitored from their fourth larva stage to death. The relationship between worm body length, stroke frequency and lifespan with this device was then studied. This device had a potential in various longitudinal researches on C. elegans including aging, drug screening, toxicity evaluation and etc.
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The Current Status, Trend, and Influencing Factors to Malnutrition of Infants and Children in China
Zhai, Feng-Ying,Wang, Hui-Jun,Chang, Su-Ying,Fu, Dawei,Ge, Keyou,Popkin, Barry M. The Korean Society of Community Nutrition 2004 Journal of community nutrition Vol.6 No.2
Children are the most nutrition sensitive sub-group of a population. The nutritional status of children should be especially emphasized at all levels. This study was performed to investigate the current status, trend, and influencing factors to malnutrition of infants and children in China. The study was mainly based on the China Health and Nutrition Survey which is a longitudinal study conducted in 8 provinces and the data on growth of children under 7 years of age in 9 cities in China. The result of this study showed that one fifth of the children under 5 years of age are still suffering from stunted growth and one tenth suffering from underweight. The nutrition intervention on children under 2 years of age, especially on those under 18 months should be emphasized. Better supplementary food can improve the nutritional status to decrease the prevalence of stunted children. Therefore, the development of supplementary food should be the priority and should be emphasized with breastfeeding.
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Preparation and Characterization of PTFE/PI Nanofiber Composite Assembled Sponges
Huizhong Liu,Dawei Li,Ying Shen,Bingyao Deng 한국섬유공학회 2021 Fibers and polymers Vol.22 No.3
Due to the ultralow density and high specific area, nanofibrous sponges show great potential in the field offiltration and separation. To prepare nanofibrous sponges for high temperature smoke filtration, polytetrafluoroethylene(PTFE) was chosen due to its corrosion resistance and high temperature resistance. PTFE nanofiber prepared viaelectrospinning shows irregular concave-convex pores in the fiber body, which can improve the specific surface area andfurther enhance filtration performance. However, sponges made of PTFE nanofiber suffered from severe shrinkage, whichlimited the development in sponge products. In this study, polyimide (PI) nanofiber converted from polyamic acids (PAAs)nanofiber was introduced into the PTFE sponges to reinforce the dimensional stability. The parameters that influenced themorphology, porosity, shrinkage ratio, and thermodynamic properties of the composite sponges were also investigated. Moreover, the filtration performance of the composite sponges was tested. Results indicated that PTFE/PI compositenanofiber sponges possessed high porosity (94.34-98.12 %), excellent thermal stability (above 550 oC), and decent filtrationefficiency (the maximum filtration efficiency reached 99.97 % to PM 2.0) were prepared, which demonstrated the potential inthe field of high-temperature filtration.
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