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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.
Flame Photometry: Lab01:16

Flame Photometry: Lab

In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
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Nursing Clinical Information System

Nursing Clinical Information System (NCIS)
A Nursing Clinical Information System (NCIS) is a specialized type of healthcare information system tailored to meet the unique needs of nursing practice. It incorporates the principles of nursing informatics to streamline information management and improve the quality of care delivery.
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Related Experiment Video

Updated: Jun 22, 2026

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
09:19

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

Upwelling radiance distribution camera system, NURADS.

Kenneth Voss, Albert Chapin

    Optics Express
    |June 5, 2009
    PubMed
    Summary
    This summary is machine-generated.

    A new fisheye camera radiometer measures underwater light. This compact instrument provides rapid, detailed spectral radiance data, improving accuracy in clear and turbid waters.

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    Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System
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    Last Updated: Jun 22, 2026

    Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
    09:19

    Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

    Published on: April 18, 2025

    Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System
    08:35

    Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System

    Published on: December 16, 2019

    Area of Science:

    • Ocean optics
    • Radiometry
    • In-water measurements

    Background:

    • Accurate measurement of in-water spectral upwelling radiance is crucial for understanding aquatic environments.
    • Previous instruments were limited by size, self-shading, and sensor performance.

    Purpose of the Study:

    • To introduce a novel fisheye camera radiometer for measuring in-water spectral upwelling radiance distribution.
    • To detail the instrument's design, characterization, and performance improvements.

    Main Methods:

    • Development of a compact fisheye camera radiometer.
    • Measurement of radiance distribution at six wavelengths.
    • Acquisition of complete spectral data sets in approximately 2 minutes.

    Main Results:

    • The new instrument is significantly smaller (0.3m diameter, 0.3m length), reducing self-shading.
    • Enhanced sensor sensitivity and a subtle lens rolloff effect improve performance.
    • Successful data acquisition in both clear and turbid water conditions.

    Conclusions:

    • The developed fisheye camera radiometer offers a significant advancement in measuring in-water spectral radiance.
    • Its compact size and improved performance enhance data quality and measurement efficiency.
    • The instrument is suitable for diverse aquatic environments, including clear and turbid waters.