알칼리 내성 bacillus sp.에 의한 생물 고분자의 희석용액 특성

• 영문명: Dilute Solution Properties of Biopolymer Produced by Alkali-Tolerant Bacillus sp.
• 발행기관: 강원대학교 산업기술연구소
• 저자명: 이신영(Lee Shin Young) 김진영(Kim Jin Young)
• 간행물 정보: 『산업기술연구』vol.20, 1~6쪽, 전체 6쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2000.09.30

영문 초록

Highly viscous biopolymer from alkali-tolerant Bacillus sp. was purified and its solution properties were investigated. The intrinsic viscosities for crude biopolymer and biopolymers purified by dialysis or CPU(cetylpyridinium chloride) treatment were 58.24, 73.60 and 42.18 dL/g. respectively. The intrinsic viscosity of biopolymer showed the maximum value at the neutral pH but it was decreased remarkably at the alkaline or acidic pH. Biopolymer exhibited the property of polyelectrolyte, showing the sharp decrease of intrinsic viscosity by the addition of NaCl, Intrinsic viscosity of dilute solution at the low NaCl concentration was exponentially dependent on temperature and its temperature dependency was increased with NaCl concentrations. The chain stiffness, coil overlap parameter, and critical concentration were 0.09, 5.25 and 0.07g/dL, respectively. Temperature dependency on intrinsic viscosity of biopolymer solution was different each other at 45℃. Flow activation energies at temperatures above 45℃ were constant, while those at temperatures below 45℃ increased with increase of added NaCl concentration.

목차

Abstract

1. 서론

2. 재료 및 방법

3. 결과 및 고찰

4. 결론

참고문헌

키워드

생물고분자 알칼리 내성 Bacillus sp. 용액 특성 biopolymer alkali-tolerant Bacillus sp. solution property