...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Microbiology >Fermentative Production of Exocellular Glucans by Fleshy Fungi
【24h】

Fermentative Production of Exocellular Glucans by Fleshy Fungi

机译：肉质真菌发酵生产胞外葡聚糖

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two specimens of higher fungi produced exocellular β-1, 3-glucans when their mycelial forms were cultivated under submerged aerobic conditions. Plectania occidentalis NRRL 3137 consumed up to 6% glucose or xylose with about 30% conversion to polymer in a medium composed of hydrolyzed soy protein, salts, and thiamine. A 5% inoculum was used in a 10-day shaken fermentation. After dilution of the culture liquors and partial disruption of mycelia with a blender, solids were removed by centrifugation, and the polymer was precipitated by the admixture of 2 volumes of ethyl alcohol. A second polymer was formed in 40 to 65% yield by fermentation with Helotium sp. NRRL 3129, which in the imperfect stage would be identified as Monilia sp. It consumed up to 4% glucose, fructose, mannose, or sucrose in 60 to 72 hr. A 2% inoculum in a medium composed of commercial defatted soy flakes, phosphate, and thiamine in tap water gave a satisfactory fermentation. This polymer was precipitated by the addition of 0.5 volume of ethyl alcohol. Both organisms have a broad pH optimum on the slightly acidic side and did best at about 25 C.
机译：当在水下好氧条件下培养菌丝体时，两个高等真菌标本产生胞外β-1、3-葡聚糖。 Plectania occidentalis NRRL 3137在由大豆蛋白，盐和硫胺素组成的介质中消耗高达6％的葡萄糖或木糖，并转化为聚合物约30％。在10天的摇动发酵中使用5％的接种物。用混合器稀释培养液并部分破坏菌丝体后，通过离心除去固体，并通过混合2体积的乙醇使聚合物沉淀。通过用Helotium sp。发酵以40-65％的收率形成第二种聚合物。 NRRL 3129，在不完善的阶段将被识别为Monilia sp.。它在60到72小时内消耗了高达4％的葡萄糖，果糖，甘露糖或蔗糖。在自来水中由商业脱脂大豆薄片，磷酸盐和硫胺素组成的培养基中接种2％的菌剂，发酵效果令人满意。通过加入0.5体积的乙醇使该聚合物沉淀。两种生物在弱酸性方面均具有最适的pH最佳值，并且在约25°C时表现最佳。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号