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Comparison and validation of multi phase closure models
Bo, W.,Jin, H.,Kim, D.,Liu, X.,Lee, H.,Pestieau, N.,Yu, Y.,Glimm, J.,Grove, J.W. Pergamon Press ; Elsevier Science Ltd 2008 COMPUTERS & MATHEMATICS WITH APPLICATIONS - Vol.56 No.5
The purpose of this paper is to propose a simple (one or two parameter) multiphase flow model, suitable for the description of Rayleigh-Taylor and Richtmyer-Meshkov mixing layers. We justify model closure assumptions in this model by comparison to Rayleigh-Taylor and Richtmyer-Meshkov simulation data. We show that the relative errors related to model closure terms are about 10%, and are about two to four times smaller than related closure models of Abgrall and Saurel.
Future Perspectives on New Approaches in Pathogen Detection
Peng Li,Bow Ho,Jeak Ling Ding 대한의생명과학회 2015 Biomedical Science Letters Vol.21 No.4
Microbial pathogens are responsible for most of the rapidly-spreading deadly infectious diseases against humans. Thus, there is an urgent need for efficient and rapid detection methods for infectious microorganisms. The detection methods should not only be targeted and specific, but they have to be encompassing of potential changes of the pathogen as it evolves and mutates quickly during an epidemic or pandemic. The existing diagnostics such as the antibody-based ELISA immunoassay and PCR methods are too selective and narrowly focused; they are insufficient to capture newly evolved mutant strains of the pathogen. Here, we introduce a fresh perspective on some new technologies, including aptamers and next generation sequencing for pathogen detection. These technologies are not in their infancy; they are reasonably mature and ready, and they hold great promise for unparalleled applications in pathogen detection.
대장종양의 c-myc와 c-H-ras 산물 및 표피성장인자에 관한 면역조직학적 연구
박찬섭,염범우,이대일 고려대학교 의과대학 1991 고려대 의대 잡지 Vol.28 No.3
To understand distribution of c-myc, c-H-ras products and epidermal growth factor(EGF) on tumor cells and neighboring normal cells, formalin fixed and paraffin embedded tissue blocks of 22 cases of adenoma and 23 cases of adenocarcinoma of colorectum were selected. And immunoenzyme histologic staining using antibodies against each oncogenes and EGF, and microscopic examination revealed; 1. Products of c-myc were noted in 18.2% of adenomas, 34.8% of carcinomas and 26% of normal neighboring tissue around lesion of cancer cases. Normal tissue around adenomas did not show any evidence of c-myc products. 2. Products c-H-ras were detected in 27.3% of adenomas and 73.9% of carcinomas. The products were also detected on normal tissue in 9.0% of neighboring adenomas and 47.8% of neighboring carcinomas. 3. EGF was detected in 45.6% of adenomas and 34.8% of carcinomas. Normal tissue surrounding tumor nests also revealed EGF in 36.4% of adenomas and 65.2% of carcinomas.
Hua, JieSong,Yeoh, Khay-Guan,Zheng, PengYuan,Ng, Han Chong,Ho, Bow 한국미생물 · 생명공학회 1999 Journal of microbiology and biotechnology Vol.9 No.3
It was shown that brain-derived neurotrophic factors (BDNFs) secreted from human neuroblastoma cells can significantly improve the growth of the neurites of PC12 nerve cells. The addition of purified BDNFs elongated the neurites of PC12 nerve cells two to three times more than the case where the addition was not made. The perfusion rate strongly affected the change of the size of human neuroblastoma cells because the cell size decreased as the perfusion rate increased. This could also influence the productivity of BDNF from the cells. It is also important to note that the BDNF production was decreased when the cell size was reduced. BDNF production rate also decreased at a fast perfusion rate in a smaller cell size. At the relatively fast perfusion rate of 18 ㎖/h, the ratio of apoptotic to necrotic cells dramatically decreased, which possibly caused the decrease of BDNF production. It has been proven that the secretion of BDNF from human neuroblastoma cells was a partially growth-related process by yielding 6.2×10 exp(-8)g of BDNF/cell of growth related parameter and 0.48×10 exp(-9)g of BDNF/cell/h of nongrowth-related parameter in a growth kinetic model. In addition, it was also found that the perfusion rate played a very important role in controlling the cell death mechanism.