电子文档交易市场
安卓APP | ios版本
电子文档交易市场
安卓APP | ios版本

生物学文献汇报

15页
  • 卖家[上传人]:lxl15****05027
  • 文档编号:136328880
  • 上传时间:2020-06-27
  • 文档格式:PPT
  • 文档大小:203.50KB
  • / 15 举报 版权申诉 马上下载
  • 文本预览
  • 下载提示
  • 常见问题
    • 1、Unique and Shared Responses of the Gut Microbiota to Prolonged Fasting: A Comparative Study Across Five Classes of Vertebrate Hosts.,Reporter:xxx Date:20171119,INTRODUCTION,1、Gut microorganisms provide a number of nutritional functions to their hosts, such as fermenting fiber and synthesizing essential amino acids . In return, hosts provide symbiotic microorganisms with a stable, protected, and nutrient-rich environment.,2、Food limitation is a physiological challenge faced by many animals that m

      2、ay affect their gut microbiota. First, fasting represents an energy crisis for microorganisms due to a reduction in the availability of nutrients . Second, many animals reduce the size of their intestines in response to fasting thereby generating a housing crisis for the microbiota.,3、There may be universal responses of the gut microbiota to fasting. The absence of free nutrients or physiological responses of hosts to fasting may exert similar selection on resident microorganisms and cause compl

      3、ementary shifts in diversity and abundances of taxa.,4、Understanding the responses of gut microorganisms to fasting is imperative, given that the gut microbiota promote host survival during periods of fasting. For example,mice and rats lacking gut microbiota (germ-free) incur higher mortality rates than conventional hosts when starved, despite similar rates of body mass loss.,5、The author compared the effects of fasting on the microbial communities of hosts from five vertebrate classes:Osteichth

      4、yes,Amphibia,Reptilia, Aves, and Mammalia. The author investigated changes in the microbial communities of two gut chambers: the colon and the cecum.,methods,The fasting time frame was divided in thirds to determine the early-fasting and mid-fastingtime points. Within ten minutes of euthanasia, the gas trointestinal tract from the distal esophagus to the rectum was removed intact. A central section (approximately 12 cm in length) of each colon was removed from all host species and promptly froze

      5、n.,1、Tilapia exhibited a continual increase in phylogenetic diversity.,Fig. 1. 1.Phylogenetic diversity of the colonic microbial communities of various hosts at different time points over prolonged fasting.,Colonic samples results,2、In toads, microbial diversity was 33% higher in early-fasted individuals and 51% higher in late-fasted individuals compared with nourished toads.,Fig. 1. 2.Phylogenetic diversity of the colonic microbial communities of various hosts at different time points over prol

      6、onged fasting.,3、There were no differences in phylogenetic diversity among the fasting geckos.,Fig. 1. 3 Phylogenetic diversity of the colonic microbial communities of various hosts at different time points over prolonged fasting.,4、Quail exhibited a variable response, with late-fasted individuals exhibiting 37% less phylogenetic diversity compared with nourished individuals .,Fig. 1.4. Phylogenetic diversity of the colonic microbial communities of various hosts at different time points over pro

      7、longed fasting.,5、Last, fasted mice exhibited 1522%higher phylogenetic diversity compared with nourished mice . These trends were also reflected in estimated measurements of species richness .,Fig. 1. 5 Phylogenetic diversity of the colonic microbial communities of various hosts at different time points over prolonged fasting.,Shared responses of the microbiota,In the colon, we were unable to identify any microbial genera that met our criteria for shared responses across allfive host species. Across tetrapods (toads, geckos, quail,mice), there were shared responses such that these animalsexhibited decreases in the abundances of Coprobacillus(P = 0.008) and Ruminococcus (P = 0.012). These decreases remained significant when investigating the colonic responses across amniotes (geckos, quail, mice;Coprococcus: P = 0.015; Ruminococcus: P = 0.036). We did not find any additional shared responses across amniotes.,谢谢聆听,

      《生物学文献汇报》由会员lxl15****05027分享,可在线阅读,更多相关《生物学文献汇报》请在金锄头文库上搜索。

      点击阅读更多内容
    最新标签
    发车时刻表 长途客运 入党志愿书填写模板精品 庆祝建党101周年多体裁诗歌朗诵素材汇编10篇唯一微庆祝 智能家居系统本科论文 心得感悟 雁楠中学 20230513224122 2022 公安主题党日 部编版四年级第三单元综合性学习课件 机关事务中心2022年全面依法治区工作总结及来年工作安排 入党积极分子自我推荐 世界水日ppt 关于构建更高水平的全民健身公共服务体系的意见 空气单元分析 哈里德课件 2022年乡村振兴驻村工作计划 空气教材分析 五年级下册科学教材分析 退役军人事务局季度工作总结 集装箱房合同 2021年财务报表 2022年继续教育公需课 2022年公需课 2022年日历每月一张 名词性从句在写作中的应用 局域网技术与局域网组建 施工网格 薪资体系 运维实施方案 硫酸安全技术 柔韧训练 既有居住建筑节能改造技术规程 建筑工地疫情防控 大型工程技术风险 磷酸二氢钾 2022年小学三年级语文下册教学总结例文 少儿美术-小花 2022年环保倡议书模板六篇 2022年监理辞职报告精选 2022年畅想未来记叙文精品 企业信息化建设与管理课程实验指导书范本 草房子读后感-第1篇 小数乘整数教学PPT课件人教版五年级数学上册 2022年教师个人工作计划范本-工作计划 国学小名士经典诵读电视大赛观后感诵读经典传承美德 医疗质量管理制度 2 2022年小学体育教师学期工作总结 2022年家长会心得体会集合15篇
    关于金锄头网 - 版权申诉 - 免责声明 - 诚邀英才 - 联系我们
    手机版 | 川公网安备 51140202000112号 | 经营许可证(蜀ICP备13022795号)
    ©2008-2016 by Sichuan Goldhoe Inc. All Rights Reserved.