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相关概念视频

Microbial Mats01:25

Microbial Mats

Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...
Soil Microbial Ecology01:29

Soil Microbial Ecology

Soil microbial ecology is defined by highly diverse, spatially structured communities that drive nutrient cycling, organic matter turnover, and overall ecosystem stability. Although a gram of soil can contain thousands of bacterial and archaeal taxa, the ecological processes they mediate are even more crucial for sustaining terrestrial life.Microhabitats and NichesSoil is a heterogeneous mixture of minerals, organic matter, water, and air. Microbes inhabit distinct microhabitats formed by...
Microbial Wastewater Treatment01:30

Microbial Wastewater Treatment

Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
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Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
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Lactic acid bacteria (LAB) and molds are instrumental in fermenting plant-based foods to enhance preservation and ensure year-round availability. These microbial processes convert plant carbohydrates into organic acids and other metabolites that inhibit spoilage organisms and contribute to the sensory qualities of the final product.In sauerkraut production, cabbage goes through a microbial succession that starts with cocci such as Leuconostoc mesenteroides. These microbes begin fermentation by...
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Bioreactors are engineered vessels designed to cultivate microorganisms under controlled conditions for industrial bioprocessing. They maintain sterility and allow precise regulation of pH, temperature, oxygen, and nutrient levels to optimize microbial growth and metabolite production. Bioreactors range from small laboratory units of 1 liter to industrial systems holding up to 500,000 liters, though only about 75% of their volume is actively used for fermentation. The remaining headspace...

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相关实验视频

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Continuously-stirred Anaerobic Digester to Convert Organic Wastes into Biogas: System Setup and Basic Operation
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在液体固体分离系统下,乳制品便环境中的微生物多样性.

B Dharmaveer Shetty1, Pramod K Pandey1, Kelly Mai1,2

  • 1Department of Population Health and Reproduction, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA.

Environmental technology
|February 3, 2024
PubMed
概括

乳制品便管理对微生物群落产生重大影响. 不同的分离系统,如哭泣墙 (WWSS) 和机械分离 (MSS) 改变了微生物景观,影响了动物和公共健康.

关键词:
乳制品肥料是奶制品的肥料.细菌 细菌 细菌是一种细菌.湖泊 湖 这些液体 - 固体分离技术废物处理废物处理废物处理废物处理废物

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科学领域:

  • 环境微生物学环境微生物学
  • 农业科学 农业科学
  • 公共卫生 公共卫生

背景情况:

  • 乳制品便含有各种微生物,包括病原体,影响动物和公共健康.
  • 了解肥料中的微生物群落动态对于管理环境和健康风险至关重要.
  • 加利福尼亚州的奶牛农场通常使用有液体固体分离的冲洗系统进行便管理.

研究的目的:

  • 评估便管理实践对乳制品便中的微生物群体组成的影响.
  • 确定便管理的不同阶段,特别是分离系统,如何影响微生物种群.
  • 为了比较流水墙分离系统 (WWSS) 和机械分离系统 (MSS) 所产生的微生物群落.

主要方法:

  • 在WWSS,MSS和多级替代乳制品废水管理系统 (ADEMS) 的四个阶段中研究了微生物群落.
  • 从乳制品便样本中提取基因组DNA.
  • 使用NovoSeq Illumina下一代测序扩大了16S rRNA基因.
  • 进行统计分析,包括相似性分析 (ANOSIM) 和多响应转换程序 (MRRP).

主要成果:

  • 在WWSS和MSS之间的微生物群落中观察到显著的差异 (p <0.05).
  • 在ADEMS中的肥管理阶段也显示出不同的微生物特征.
  • 该研究提供了关于微生物群落因特定管理实践而发生的转移的定量数据.

结论:

  • 肥料管理系统,特别是使用的分离技术 (WWSS与MSS),显著塑造了乳制品肥料中的微生物社区结构.
  • 这些发现对于优化乳制品便管理来减轻环境和公共卫生风险具有实际意义.
  • 进一步的研究可以在这些结果的基础上开发有针对性的战略,用于管理农业废物中的微生物种群.