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相关概念视频

Meridians01:28

Meridians

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In surveying, meridians are vital reference lines to measure directions and establish accurate land orientations. Meridians run from the north to the south poles, providing a stable framework for angular measurements and mapping. Meridians are fundamental in survey design, with the primary types being astronomic, magnetic, and assumed meridians. Each type offers distinct benefits and limitations, selected based on the project's scale and precision needs.The astronomic meridian is aligned with...
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Structure of Lipids03:38

Structure of Lipids

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Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic...
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Selected Data About Geographic Locations01:25

Selected Data About Geographic Locations

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Geographic Information Systems (GIS) rely on two core types of data: spatial data and attribute data.Spatial DataSpatial data defines the physical location of features within a coordinate system, typically expressed in terms of latitude and longitude. It provides precise positioning for elements like roads, rivers, or buildings.Attribute DataAttribute data complements spatial data by adding descriptive information about these features. For example, a road's spatial data includes its start and...
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Lipids as Anchors01:32

Lipids as Anchors

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In the plasma membrane, the lipids forming the bilayer can also act as an anchor to tether proteins to the membrane. The three main types of lipid anchors found in eukaryotes are – prenyl groups, fatty acyl groups, and glycosylphosphatidylinositol or GPI groups. Prenyl and fatty acyl groups act as anchors on the cytosolic surface of the membrane, whereas GPI anchors proteins on the extracellular side.
The carboxy-terminal of most of the prenylated proteins, such as Ras proteins, contains...
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Fischer Projections02:18

Fischer Projections

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Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines.
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Magnetic Declination01:19

Magnetic Declination

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Magnetic declination is the angle between true north, which aligns with the Earth's rotational axis, and magnetic north, which follows the direction of the Earth's magnetic field. This discrepancy exists because the magnetic poles do not coincide with the geographic poles. The value of magnetic declination depends on the observer's location on Earth and is subject to changes over time due to the dynamic nature of the Earth's magnetic field.The declination is called eastern when magnetic north...
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相关实验视频

Updated: Jun 23, 2025

Author Spotlight: Unveiling Plankton Response to Climate Change Through Time-Series Data and Artistic Expression
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欧米茄-3世界地图:2024年更新

Jan Philipp Schuchardt1, Philine Beinhorn2, Xue Feng Hu3

  • 1The Fatty Acid Research Institute, 5009 W. 12(th) St. Ste 5, Sioux Falls, SD 57106, United States; Institute of Food and One Health, Leibniz University Hannover, Am kleinen Felde 30, 30167 Hannover, Germany.

Progress in lipid research
|June 15, 2024
PubMed
概括

更新了欧米茄-3指数 (O3I) 地图,显示大多数国家的低n3PUFA水平. 几个国家改善了O3I地位,而其他国家,如伊朗和印度,显示了特别糟糕的水平.

关键词:
转换方程是指一个转换方程.DHA 和 DHA 是什么意思?美国环保署 EPA EPA估计的欧米茄-3指数在GOED的临床数据库中.全球omega-3的地位

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Using Generative Art to Convey Past and Future Climate Transitions
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08:15

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NMR Spectroscopy as a Robust Tool for the Rapid Evaluation of the Lipid Profile of Fish Oil Supplements
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科学领域:

  • 营养科学 营养科学
  • 公共卫生 公共卫生
  • 生物标志物研究 生物标志物研究

背景情况:

  • 欧米茄-3指数 (O3I) 是评估n3PUFA状态的关键生物标志物.
  • 第一个全球O3I地图于2016年发布.
  • 更新此地图对于跟踪人口水平omega-3脂肪酸摄入量至关重要.

研究的目的:

  • 更新2016年全球 n3 PUFA 状态地图.
  • 将Omega-3指数 (O3I) 和血液中EPA + DHA水平的新数据纳入其中.
  • 分析自2016年以来全球n3PUFA状态的变化.

主要方法:

  • 在文献中搜索报告O3I或1999年后可转换EPA + DHA水平的研究.
  • 使用新开发的方程将非RBC EPA + DHA指标转换为估计的O3I.
  • 包括来自48个国家/地区的328项临床试验和观察性研究 (342,864名受试者) 的基线数据.

主要成果:

  • 大多数国家表现出低至非常低的O3I水平 (≤6%).
  • 在美国,加拿大,意大利,土耳其,英国,爱尔兰,希腊 (非常低至低),法国,西班牙,新西兰 (低至中等),芬兰,冰岛 (中等至理想) 观察到显著改善.
  • 伊朗,埃及和印度的O3I水平特别低.

结论:

  • 全球n3 PUFA状态在许多地区仍然低于最佳水平.
  • 追踪O3I提供了对人口营养状况的宝贵见解.
  • 需要持续监测和公共卫生举措,以改善世界各地的欧米茄-3脂肪酸摄入量.