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Related Concept Videos

Light as Energy01:35

Light as Energy

The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit less...
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.
Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
Photoelectric Effect02:26

Photoelectric Effect

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Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...

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Bioluminescence Imaging of Heme Oxygenase-1 Upregulation in the Gua Sha Procedure
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Time to see the light.

Erin Dean

    Nursing Standard (Royal College of Nursing (Great Britain) : 1987)
    |May 19, 2012
    PubMed
    Summary
    This summary is machine-generated.

    Low vitamin D levels are a growing concern in the UK, with children increasingly diagnosed with rickets. Evidence linking vitamin D deficiency to non-bone conditions like heart disease remains inconclusive.

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    Area of Science:

    • Nutritional Science
    • Public Health

    Background:

    • Growing concern regarding low vitamin D levels in the UK population.
    • Children from diverse backgrounds are presenting with rickets, a bone disease linked to poor nutrition.

    Purpose of the Study:

    • To summarize the current understanding of vitamin D deficiency in the UK.
    • To evaluate the evidence for vitamin D's role in conditions beyond bone health.

    Main Methods:

    • Review of existing literature on vitamin D levels and deficiency in the UK.
    • Analysis of studies investigating the link between vitamin D and various health conditions.

    Main Results:

    • Rickets incidence is increasing in UK children, highlighting nutritional deficiencies.
    • Evidence supporting vitamin D's role in non-bone diseases like heart disease and multiple sclerosis is inconclusive.

    Conclusions:

    • Vitamin D deficiency is a significant public health issue in the UK, particularly affecting children.
    • Further research is needed to clarify the association between vitamin D and non-skeletal health outcomes.