Genetic Engineering and Biotechnology Research Institute, Minoufiya University, El-Sadat City, Egypt. tayel
Int J Biol Macromol. 2011 Aug 1;49(2):241-5. doi: 10.1016/j.ijbiomac.2011.04.023. Epub 2011 May 7.
The waste biomass of Aspergillus niger, following citric acid production, was used as a source for fungal chitosan extraction. The produced chitosan was characterized with deacetylation degree of 89.6%, a molecular weight of 25,000 dalton, 97% solubility in 1% acetic acid solution and comparable FT-IR spectra to standard shrimp chitosan. Fungal chitosan was applied as a cotton fabric finishing agent using pad-dry-cure method. The topographical structure of chitosan-treated fabrics (CTF) was much improved compared with control fabrics. CTF, after durability tests, exhibited a powerful antimicrobial activity against both E. coli and Candida albicans, the captured micrographs for E. coli cells contacted with CTF showed a complete lysis of cell walls with the prolonging contact time. The produced antimicrobial CTF could be proposed as a suitable material for many medical and hygienic applications.
废弃的黑曲霉生物质，在柠檬酸生产之后，被用作真菌壳聚糖提取的来源。所生产的壳聚糖具有 89.6%的脱乙酰度、25000 道尔顿的分子量、97%在 1%醋酸溶液中的溶解度，并且与标准虾壳聚糖的 FT-IR 图谱相当。真菌壳聚糖通过轧烘焙法被应用于棉织物整理剂。壳聚糖处理过的织物（CTF）的形貌结构与对照织物相比有了很大的改善。经过耐久性测试，CTF 对大肠杆菌和白色念珠菌都表现出强大的抗菌活性，与 CTF 接触的大肠杆菌细胞的捕获微观照片显示，随着接触时间的延长，细胞壁完全裂解。所生产的抗菌 CTF 可被提议用于许多医疗和卫生应用的合适材料。
