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2° Amines to N-Nitrosamines: Reaction with NaNO201:20

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Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
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蓝光照射诱导了部分化.

Ru Zheng1, Yiming Feng1, Lingrui Kong1

  • 1College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; Key Laboratory of Water and Sediment Sciences, Ministry of Education of China, Beijing 100871, China.

Water research
|March 5, 2024
PubMed
概括

蓝光显著影响化,促进氨氧化古生物 (AOA) 和抑制氧化细菌 (NOB). 这揭示了波长对循环微生物的特定影响.

关键词:
蓝光灯是蓝光的,它可以发出蓝光.不同表达的基因 (DEGs)亚化剂 亚化剂部分化 部分化摄影受体蛋白质是一种摄影受体蛋白质.

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科学领域:

  • 微生物学 微生物学
  • 环境科学 环境科学
  • 生物化学 生物化学

背景情况:

  • 太阳光在生物体过程中的作用已知,但特定的光波长对化的影响尚不清楚.
  • 化是循环的关键部分,涉及氨氧化古生物 (AOA) 和氨氧化细菌 (AOB),以及酸盐氧化细菌 (NOB).

研究的目的:

  • 研究不同光波长 (蓝色,红色,白色) 对化过程的影响.
  • 了解化微生物对光暴露的差异性基因表达和生理反应.
  • 阐明AOA,AOB和NOB光敏感性背后的机制.

主要方法:

  • 化社区暴露在受控光条件下 (蓝色,红色,白色光).
  • 在不同的光处理下对化剂中差异表达基因 (DEGs) 的分析.
  • 评估微生物群落结构,重点关注AOA,AOB和NOB的相对丰度.
  • 评估代谢途径 (例如,TCA循环) 和细胞修复机制 (例如,DNA修复,ROS清理).

主要成果:

  • 蓝光 (440-480nm) 在化剂中诱导的DEG百分比最高 (超过60%),而红光 (13.4%) 或白光 (20.3%).
  • 蓝光促进了部分化,这是由AOA增加的氨氧化 (相对丰度从8.6%上升到14.2%) 推动的,得到了增强的TCA循环和DNA修复的支持.
  • 由于新发现的蓝光光受体,氧化细菌 (NOB) 受到蓝光的严重抑制,而氨氧化细菌 (AOB) 显示出增强的DNA修复能力.

结论:

  • 光的波长极大地影响了化,蓝光对不同的化微生物有着不同的影响.
  • 在蓝光下,AOA表现出增强的代谢和修复功能,促进它们在部分化中的作用.
  • NOB对蓝光敏感,这表明一种新的光敏感性机制阻碍了它们的活动,影响了人工系统中的循环.