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The retina. Light (particularly short wavelengths) can interact with photoreceptor associated opsins and retinoids and cause damage via the overproduction of reactive oxygen species (ROS) (Boulton et al. 2001), but such damage can also arise outside the photoreceptors.
- Electrons
An electron is a particle that carries a negative electrical...
- Nucleus
A cell with a large central nucleus. The dark mass within...
- Melanin
A reddish to dark-brown to black pigment occurring in the...
- Epidermis
In humans and animals, epidermis refers to the thin...
- Conjunctiva
A transparent membrane covering the eyeball and the inner...
- Infrared Radiation
Electromagnetic radiation with wavelengths longer than...
- Figure 3
Figure 5. Light penetration in the skin . Table 1. Lamp...
- Glossary
As a supplement the GreenFacts Digests, the GreenFacts...
- Electrons
Light has an impact on different aspects of life. The colouration of plumage or body, growth, reproduction, migration, diapause in different insects, fishes, birds, mammals and reptiles. Several entities find dark conditions suitable, while some others require light (hydroids). Significance of light is also seen in the poultry reared in ...
May 22, 2012 · The answer is that is does, he says. Biophoton streams consist of short quasiperiodic bursts, which he says are remarkably similar to those used to send binary data over a noisy channel. That ...
Oct 19, 2023 · Bio luminescence is a type of chemiluminescence, which is simply the term for a chemical react ion where light is produced. (Bio luminescence is chemi luminescence that takes place inside a living organism.) Bioluminescence is a " cold light." Cold light means less than 20% of the light generates thermal radiation, or heat.
- Glowing Colours
- Student Activity: Bioluminescence in The Laboratory
- References
- Web References
- Resources
In nature, bioluminescence produces different colours: mainly blue, green and yellow. The distinctive colour of light that a species emits depends on the environment in which it has evolved. Blue emissions usually occur in the deep ocean, green emissions in species that live along the coastline, and yellow (and also green) emissions typically in fr...
In this activity, students can see a luminescence reaction take place when chemical reagents are mixed together. The key ingredient is luminol, a synthetic chemiluminescent substance that produces a blue glow when it reacts chemically. Although the reactions of luminol and luciferin are different – the oxidation reaction of luminol is catalysed by ...
Farusi G (2007) Monastic ink: linking chemistry and history. Science in School 6: 36-40Farusi G (2011) Smell like Julius Caesar: recreating ancient perfumes in the laboratory. Science in School 21: 40-46Farusi G (2012) Indigo: recreating Pharaoh’s dye. Science in School 24: 40-46Furtado S (2009) Painting life green: GFP. Science in School 12: 19-23w1 – A simple tool to convert a wavelength in nanometres to an RGB or hexadecimal colouris available on the Academo website, a free collection of educational resourcesw2 – An accessible account of the 2008 Nobel Prize for Chemistryawarded to Osamu Shimomura, Martin Chalfie and Roger Y Tsien is available on the Nobel Prize websitew3 – Science on Stage is a network of local, national and international events for teachers, initially launched in 1999 by EIROforum, the publisher of Science in School. At each national event, a d...Two accessible articles about (bio)luminescence:A charming and informative animation about bioluminescenceAn atmospheric video with music celebrating the extraordinary beauty of ocean bioluminescenceA short video demonstrating how to make luminolApr 25, 2016 · Bioluminescence is the emission of light by an organism as a result of a biochemical reaction. In contrast to fluorescence and phosphorescence, bioluminescence reactions do not require the initial absorption of sunlight or other electromagnetic radiation by a molecule or pigment to emit light. Bioluminescent systems produce light through the ...
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When these reactions occur in living organisms such as bacteria, fireflies, squid and deep-sea fishes, the process is known as bioluminescence. At least two chemicals are required to make light. Chemists use the generic term luciferin to describe the one producing the light. They use the term luciferase to describe the enzyme that drives, or ...
