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Dyeing of Polyester and Nylon with Semi-synthetic Azo Dye by Chemical Modification of Natural Source Areca Nut 被引量:2
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作者 Ashitosh B.Pawar Sandeep P.More R.V.Adivarekar 《Natural Products and Bioprospecting》 CAS 2018年第1期23-29,共7页
Various azo compounds(Modified dyes)have been synthesised by chemical modification of areca nut extract(epicate-chin),a plant-based Polyphenolic compound to get semi-synthetic dyes.Three different primary amines namel... Various azo compounds(Modified dyes)have been synthesised by chemical modification of areca nut extract(epicate-chin),a plant-based Polyphenolic compound to get semi-synthetic dyes.Three different primary amines namely p-nitro aniline,p-anisidine and aniline,were diazotized to form their corresponding diazonium salts which were further coupled with an areca nut extract.Preliminary characterization of the areca nut extract and the resultant azo compounds(Modified dyes)was carried out in terms of melting point,solubility tests,thin layer chromatography,UV-Visible and FTIR spectroscopy.These modified dyes were further applied on polyester and nylon fabrics and%dye exhaustion was evaluated.Dyed fabrics were further tested for their fastness properties such as wash fastness,rubbing fastness,light fastness and sublimation fastness.The results of the fastness tests indicate that,all the three modified dyes have good dyeability for polyester and nylon fabrics.The dyed fabrics were also tested for ultraviolet protection factor which showed very good ultraviolet protection. 展开更多
关键词 semi-synthetic azo dye Chemical modification Modified dyes Areca nut Ultraviolet protection factor
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Facilitated column selection in the separation of acetylspiramycin components using a simple column classification system 被引量:1
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作者 王明娟 郑超 +4 位作者 胡昌勤 金少鸿 Hoogmartens Jos VanSchepdael Ann Adams Erwin 《Journal of Chinese Pharmaceutical Sciences》 CAS 2011年第6期572-577,共6页
Acetylspiramycin(ASPM),a 16-membered basic macrolide antibiotic,is the acetylated derivative of spiramycin.In addition to the four main components,more than seventy minor components could be present in ASPM.Thus,it ... Acetylspiramycin(ASPM),a 16-membered basic macrolide antibiotic,is the acetylated derivative of spiramycin.In addition to the four main components,more than seventy minor components could be present in ASPM.Thus,it is a challenge to obtain a baseline separation of ASPM components.Meanwhile,in some cases it was found that the results obtained by different brands of C_(18) columns were significantly different,indicating the necessity of a rational column selection for the separation of ASPM components.In this paper,we attempted to facilitate column selection for the analysis of ASPM using the database of the column characterization system established by Leuven University.With the CAPCELL PAK MG C_(18)(250 mm×4.6 mm,5μm) as the reference column,three groups of columns(F2 group:similar selectivity;2F6:intermediate ranked group;F6 group: different selectivity,compared to the reference column) were selected,and their performances in the separation of ASPM components were evaluated under the chromatographic conditions described in Chinese Pharmacopoeia monograph.A good relationship was demonstrated between the ranking of columns and their selectivity in the separation of ASPM components,indicating the column classification system established by Leuven University was a helpful tool in the selection of suitable columns for the analysis of ASPM,a complex mixture of basic compounds. 展开更多
关键词 ACETYLSPIRAMYCIN semi-synthetic antibiotic Column selection Column characterization system
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