Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

The Phosphorus Cycle01:21

The Phosphorus Cycle

43.5K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
43.5K
Factors Affecting Solubility04:01

Factors Affecting Solubility

36.5K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
36.5K
Primary Production01:06

Primary Production

25.0K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
25.0K
Phosphorylation01:02

Phosphorylation

53.5K
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
53.5K
Protein Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

14.9K
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
14.9K
Phosphoinositides and PIPs01:42

Phosphoinositides and PIPs

10.0K
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
10.0K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Machine-learning model to delineate sub-surface agricultural drainage from satellite imagery.

Journal of environmental quality·2023
Same author

Building a library of source samples for sediment fingerprinting - Potential and proof of concept.

Journal of environmental management·2023
Same author

Watershed- and reach-scale drivers of phosphorus retention and release by streambed sediment in a western Lake Erie watershed during summer.

The Science of the total environment·2022
Same author

Phosphorus sources, forms, and abundance as a function of streamflow and field conditions in a Maumee River tributary, 2016-2019.

Journal of environmental quality·2021
Same author

Riparian Forest Cover Modulates Phosphorus Storage and Nitrogen Cycling in Agricultural Stream Sediments.

Environmental management·2021
Same author

Seasonal Variation in Sediment and Phosphorus Yields in Four Wisconsin Agricultural Watersheds.

Journal of environmental quality·2019

相关实验视频

Updated: Jan 8, 2026

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
06:42

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Published on: July 22, 2019

7.0K

在表面下水过程中,变化的动态形式从场到流在表面下水过程中变化.

Rebecca M Kreiling1, Tanja N Williamson2, Faith A Fitzpatrick3

  • 1U.S. Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, USA.

Journal of environmental quality
|December 17, 2025
PubMed
概括

农业排水通过 (P) 运输影响水质. 来自田地的溶解P可以与溪流中的悬浮沉积物 (SS) 结合,从而降低下游的生物可用性.

更多相关视频

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading
10:49

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading

Published on: March 6, 2014

17.8K
Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method
08:21

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

Published on: May 18, 2018

15.1K

相关实验视频

Last Updated: Jan 8, 2026

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
06:42

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Published on: July 22, 2019

7.0K
Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading
10:49

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading

Published on: March 6, 2014

17.8K
Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method
08:21

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

Published on: May 18, 2018

15.1K

科学领域:

  • 环境化学环境化学
  • 水质科学 水质科学
  • 农业科学 农业科学

背景情况:

  • 农业排水是营养污染的主要来源,影响水体.
  • (P) 存在于溶解和颗粒形式,影响其环境命运和生物可用性.
  • 在运输过程中P在形式之间的转化影响其对水生生态系统的影响.

研究的目的:

  • 量化 (P) 形式和丰富度在农业表面下水和接收溪水中.
  • 为了比较场流和溪流环境之间的悬浮沉积物 (SS) 的P分化和吸收.
  • 了解P生物可用性如何在从农田到河流的运输过程中发生变化.

主要方法:

  • 在2022年3月至2023年6月期间在威斯康星州东河流域收集了5次流水事件的表面冲水和溪水样本.
  • 分析的P形式 (溶解和颗粒物) 和收集样本中的丰度.
  • 特征悬浮沉积物 (SS) 颗粒大小和P吸附能力.

主要成果:

  • 表面流水主要含有溶解的P,颗粒物P被吸附到细粘土中.
  • 流水主要含有微粒P被吸收成泥,尽管细粘土丰富.
  • 在低流量和较小的排水事件中,SS的P缩增加,这表明在运输过程中P吸收.

结论:

  • 发生了P形式的转变,从场流量 (溶解) 到流水 (颗粒),表明溶解的P吸收到SS.
  • 这种吸附过程改变了P的生物可用性,可能减少了下游出口的生物可用P的数量.
  • 了解农业流域的P动态对于管理水质和缓解环保变化至关重要.