It is one of the most important enzymes in medical diagnostics: Horseradish peroxidase is used for many medical products—it is often used when a color change of a test strip is to detect the presence of antibodies or other ...
Biotechnology
Jun 22, 2023
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30
Researchers at NYU Abu Dhabi have developed a new rapid testing method for COVID-19—an adhesive bandage that relies on gold nanoparticles to quickly detect the immune antibodies in the bloodstream.
Bio & Medicine
Jun 20, 2023
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91
Empathy is the cornerstone of the care that therapists provide their clients. But people of color often find white counselors misunderstand them based on biases and assumptions, according to a new journal article in Counselor ...
Education
Jun 13, 2023
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8
In a study published online in Nano Letters, the team led by Prof. Li Chuanfeng and Dr. Xu Jinshi from the University of Science and Technology of China of the Chinese Academy of Sciences made progress in enhancing the fluorescence ...
Nanophysics
Jun 9, 2023
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89
The Mars Express orbiter, the European Space Agency's (ESA) first interplanetary mission, entered orbit around Mars on June 2nd, 2003. Since then, the probe has mapped the Martian surface using its High-Resolution Stereo ...
Planetary Sciences
Jun 7, 2023
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34
The Kuiper Belt is a massive disk of icy bodies, including Pluto, that is located just outside of Neptune's orbit in our solar system. Objects observed in the Kuiper Belt exhibit a more diversified color range than any other ...
Astronomy
May 31, 2023
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85
Materials scientists are often bioinspired, and in a new study, bird-inspired by structural colors exhibited by avian species to form non-iridescent nanoparticle assemblies. Such nanoparticle mixtures varying in particle ...
Some foods and medicines, such as many COVID-19 vaccines, must be kept cold. As a step toward a robust, stable technique that could indicate when these products exceed safe limits, researchers in ACS Nano report a class of ...
Nanomaterials
May 31, 2023
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26
The spectacular transformation of a stretch of Venice's Grand Canal to fluorescent green was due to fluorescein, a non-toxic substance used for testing wastewater networks, local authorities said on Monday.
Environment
May 30, 2023
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4
If you look at enough dinosaur fossils, you'll see that their skulls sport an amazing variety of bony ornaments, ranging from the horns of Triceratops and the mohawk-like crests of hadrosaurs to the bumps and knobs covering ...
Plants & Animals
May 23, 2023
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211
Color or colour (see spelling differences) is the visual perceptual property corresponding in humans to the categories called red, green, blue and others. Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects, materials, light sources, etc., based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space, colors can be identified numerically by their coordinates.
Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.
The science of color is sometimes called chromatics, colorimetry, or simply color science. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what we commonly refer to simply as light).
This text uses material from Wikipedia, licensed under CC BY-SA
