Studies on the Physico-chemical Properties of Polyglutamic Acid Produced by Bacillus subtilis No. 5 E

Name: Work Video:
Duration: 3 min 30 s
Sumihiko Sawa; Takeo MURAKAWA; Takehiko Watanabe; Sawao Murao; Seijiro OMATA
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'https://openalex.org/W2778153218', 'https://openalex.org/W2748952813', 'https://openalex.org/W2527526854', 'https://openalex.org/W2300959742', 'https://openalex.org/W2078814861', 'https://openalex.org/W1999761272', 'https://openalex.org/W1531601525'], 'abstract_inverted_index': {'Bacillus': [0], 'subtilis': [1], 'No.': [2], '5': [3], 'Eの生産するPGAについて,その物理化学的諸性質を解明するために,水溶液として示す特異な粘性挙動についての詳細な検討を行なうと同時に,粘性発現の機作を,': [4], 'PGA分子のコンボメーションの面から検討を行なった.その結果,': [5], '(1)': [6], 'PGA水溶液の粘度は中性付近で最大値を示し,酸およびアルカリ性では,ともに著しく低下した.またこの粘度は,加熱ならびに無機塩類の添加により著しく低下した.': [7], '(2)': [8], 'Na-PGAの固有粘度は,': [9], '151であった.': [10], '(3)': [11], '粘度,赤外吸収スペクトルおよび旋光分散の測定から,': [12], 'PGAは酸性水溶液では平行β-構造をとるが,中性付近ではランダム構造をとり,ペプチド鎖はかなり伸びた状態にあり,したがって粘度は最大値を示すが,アルカリ性ではちぢまった形のランダム構造をとるため,粘度も急激に低下する.': [13], '(4)': [14], '固有粘度,沈降定数から求めた本PGAの分子量は1.16×106であり,固有粘度,分子長から求めた分子量は1.01×106であった.': [15], '(5)': [16], '流動複屈折から求めたPGAの分子長は約8000Å,また電子顕微鏡写真を計測して求めた値は幅50Å,長さ6000～10,000Åであった.': [17]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2319779519', 'counts_by_year': [], 'updated_date': '2024-12-16T23:00:00.466019', 'created_date': '2016-06-24'}
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