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相关概念视频

Light Acquisition02:16

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
Key Elements for Plant Nutrition02:35

Key Elements for Plant Nutrition

Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the atmosphere, the...
Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

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相关实验视频

Updated: Jun 22, 2026

Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses
10:20

Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses

Published on: August 9, 2019

在Troilite中对农业转化的电子光学观测.

A Putnis

    Science (New York, N.Y.)
    |November 1, 1974
    PubMed
    概括

    从高特洛伊石转变为低特洛伊石的过程涉及连续的转变为过渡结构,随后是不连续的转变为低温形式,说明了转移稳定的行为.

    科学领域:

    • 矿物物理 矿物物理
    • 地质化学 地质化学
    • 材料科学 材料科学 材料科学

    背景情况:

    • 特洛伊莱特 (FeS) 呈现出与地质学和材料科学相关的相变.
    • 了解这些转变是解释矿物在不同条件下的行为的关键.

    研究的目的:

    • 为了阐明高到低troilite转换的机制.
    • 描述中间阶段的性质及其形成路径.

    主要方法:

    • 使用了高分辨率显微镜和衍射技术.
    • 进行了热力学和动力学分析.

    主要成果:

    • 转型通过一个独特的过渡结构进行.
    • 过渡到中间状态是连续的,而最终转换到低温阶段是不连续的.
    • 这种途径突出显示了低温阶段受阻核化的潜力.

    结论:

    • 特洛伊莱特表现出复杂的相位行为,包括连续和不连续的转换.
    • 由于核化障碍,在特洛伊莱特系统中可以实现元稳定状态.
    • 这些发现提供了关于硫化铁在各种环境中的行为的见解.

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    High-Throughput, In-Field Screening of Photosynthetic Efficiency in Crop Plants Using an Autonomous Robot
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    相关实验视频

    Last Updated: Jun 22, 2026

    Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses
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    Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses

    Published on: August 9, 2019

    Field Measurement of Effective Leaf Area Index using Optical Device in Vegetation Canopy
    06:28

    Field Measurement of Effective Leaf Area Index using Optical Device in Vegetation Canopy

    Published on: July 29, 2021

    High-Throughput, In-Field Screening of Photosynthetic Efficiency in Crop Plants Using an Autonomous Robot
    07:12

    High-Throughput, In-Field Screening of Photosynthetic Efficiency in Crop Plants Using an Autonomous Robot

    Published on: January 9, 2026