Spicaria 属の一菌株が産生するデキストラナーゼの口腔内連鎖球菌多糖類に対する作用
スポンサーリンク
概要
- 論文の詳細を見る
A dextranase preparation obtained from culture of a strain of Spicaria species has been found effective in removing or preventing formation of dental plaque in human in the previous report.The aim of this study was to clarlify the in vitro effects of this dextranase on different polysaccharides produced by various strains of streptococciThe results were as follows:1) Polysaccharides were prepared from cultures of 7 strains of cariogenic Streptococcus mutans (strains AHT, Ingbritt, HSR-6, SLR-4, FA-1 and GS-5), a strain of Strept. salivarius (HHT) and a non-cariogenic strain of Streptococcus sp. (CHT). Water soluble polysacharides were obtained from all strains except HSR-6, and insoluble one was from HSR-6. In addition to these polysaccharides KOH soluble one was seperated from strain SLR-4.2) The analytical data showed that the polysaccharide from strain HHT was of levan type and the others were of dextran type.3) The effects of each dextranase from Spicaria sp. and Penicillium sp. on various streptococcal polysacharides at pH 5.8 were estimated by calculating the release of reducing groups. Water soluble polysaccharides produced by strains AHT and HHT, and KOH soluble one from strain SLR-4 were not hydrolysed by both dextranases. A dextranase from Spicaria sp. showed strong hydrolysing activity against a soluble polysaccharide of strain FA-1 and an insoluble one of HSR-6, but that from Penicillium sp. did only weak activity upon them. Both dextranases exerted their activities in the similar manner on all the polysaccharides except those described above.4) At pH 7.0 all streptococcal polysaccharides resisted exclusively hydrolysis with the dextranase from Penicillium sp. But the hydrolysing capacity of the dextranase from Spicaria sp. decreased only slightly.
論文 | ランダム
- ジル・ドゥ・ラ・トゥレット症候群の7歳男子への遊戯療法過程
- 自然観察会 事始め (環境問題に関する実験・観察)
- 「豹」と「ライオン」--Ernest Hemingwayの象徴性
- 早期食道癌のX線診断の現況と問題点 (消化管X線診断の現況)
- キャンバ角が操縦性・安定性に及ぼす影響 (操縦性・安定性)