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Mayank Saxena,P. S. Singh,A. Bhattacharya 한국고분자학회 2022 Macromolecular Research Vol.30 No.8
Poly(vinyl alcohol) (PVA)-coated membranes on polysulfone (PS) were cross-linked using maleic acid. The membrane properties (viz. hydrophilicity) were tailored for the ester linkage due to PVA and maleic acid cross-linking. The separation of tea polyphenol by PS-PVA composite membrane was investigated in this study. Cross-linked PVA coated on two different molecular weight cut-off (MWCO) PS membrane systems was prepared for this purpose. The permeation flux and separation for tea polyphenol are the criteria for evaluation. The separation of tea-polyphenol follows the trend PS-PVA-IV > PS-PVA-III > PS-PVA-II > PS-PVA-I. Higher dilution deteriorated the tea-polyphenol separation performance of the membranes. The membranes showed their best performance at pH 6.5. The time dependence separation performance study revealed the order PS-PVA-IV > PS-PVA-III > PS-PVA-II > PS-PVA-I membranes.
Minhas, Sachin,Bhalla, Sunita,Shokeen, Yogender,Jauhri, Mayank,Saxena, Renu,Verma, Ishwar Chandra,Aggarwal, Shyam Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.5
Cytotoxic T-lymphocyte antigen 4 (CTLA-4) is an important protein involved in the regulation of the immune system. The +49 G/A polymorphism is the only genetic variation in the CTLA-4 gene that causes an amino acid change in the resulting protein. It is therefore the most extensively studied polymorphism among all CTLA-4 genetic variants and contributions to increasing the likelihood of developing cancer are well known in various populations, especially Asians. However, there have hiterto been no data with respect to the effect of this polymorphism on breast cancer susceptibility in our North Indian population. We therefore assayed genomic DNA of 250 breast cancer subjects and an equal number of age-, sex- and ethnicity-matched healthy controls for the CTLA-4 +49 G/A polymorphism but no significant differences in either the gene or allele frequency were found. Thus the CTLA-4 +49 G/A polymorphism may be associated with breast cancer in other Asians, but it appears to have no such effect in North Indians. The study also highlights the importance of conducting genetic association studies in different ethnic populations.