Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10811-012-9791-7 |
Rheology and composition of a multi-utility exopolymer from a desert borne cyanobacterium Anabaena variabilis | |
Bhatnagar, M.1; Pareek, S.; Ganguly, J.2; Bhatnagar, A.1 | |
通讯作者 | Bhatnagar, M. |
来源期刊 | JOURNAL OF APPLIED PHYCOLOGY
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ISSN | 0921-8971 |
出版年 | 2012 |
卷号 | 24期号:6页码:1387-1394 |
英文摘要 | The desert cyanobacterium Anabaena variabilis produces an exopolymer during the stationary growth phase in batch culture. Optimal polymer production was observed at pH 10 under phosphorus limitation. Chemical analysis showed it to be composed of 49% carbohydrate and 19% protein. Monosaccharide analysis revealed a heteropolysaccharidic nature with glucose, mannose, and galactose as the main neutral sugars. Infrared (IR) spectrum of the exopolymer showed absorption bands at 1,645 and 1,421 cm(-1) characteristic of C=O in the carboxylate group. Strong band was observed at 1,072 cm(-1) due to C-O-C or C-O-P stretching vibrations. A band at 2,363 cm(-1) corresponding to C-H stretch of protein was also observed. IR spectrum suggested that the exopolymer is nonsulfated. Rheological properties of the polymer showed marked shear thinning non-Newtonian behavior in the concentration range of 0.1-0.4%. However, it appeared to undergo change in the internal structure on shearing thereby exhibiting thixotropic behavior. The polymer possessed 75% flocculating ability vis a vis alum, 71% emulsification of hexadecane, and good thermal stability making it a potent candidate for multiple industrial applications. The exopolymer bound 156 g H2O g(-1) and exhibited antibacterial activity against Staphylococcus aureus suggesting a potential for application in wound management as well. |
英文关键词 | Anabaena variabilis Cyanobacteria Exopolymer Flocculant Water-absorbing capacity Wound healing |
类型 | Article |
语种 | 英语 |
国家 | India |
收录类别 | SCI-E |
WOS记录号 | WOS:000310232900006 |
WOS关键词 | CYANOSPIRA-CAPSULATA ; CULTURE BROTHS ; POLYSACCHARIDES ; GROWTH ; EXOPOLYSACCHARIDE ; TOLERANCE ; POLYMERS ; BEHAVIOR ; MUCILAGE ; LAYER |
WOS类目 | Biotechnology & Applied Microbiology ; Marine & Freshwater Biology |
WOS研究方向 | Biotechnology & Applied Microbiology ; Marine & Freshwater Biology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/173155 |
作者单位 | 1.MDS Univ, Dept Microbiol, Algae Biofuel & Biomol Ctr, Ajmer, Rajasthan, India; 2.Bengal Engn & Sci Univ, Dept Chem, Howrah, WB, India |
推荐引用方式 GB/T 7714 | Bhatnagar, M.,Pareek, S.,Ganguly, J.,et al. Rheology and composition of a multi-utility exopolymer from a desert borne cyanobacterium Anabaena variabilis[J],2012,24(6):1387-1394. |
APA | Bhatnagar, M.,Pareek, S.,Ganguly, J.,&Bhatnagar, A..(2012).Rheology and composition of a multi-utility exopolymer from a desert borne cyanobacterium Anabaena variabilis.JOURNAL OF APPLIED PHYCOLOGY,24(6),1387-1394. |
MLA | Bhatnagar, M.,et al."Rheology and composition of a multi-utility exopolymer from a desert borne cyanobacterium Anabaena variabilis".JOURNAL OF APPLIED PHYCOLOGY 24.6(2012):1387-1394. |
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