PPT - kimscience.com
... E. Coli colonizes the intestine by using the fimbriae to attach to each other and the cells lining of the intestinal track Biofilms! (plaque on teeth or scum in showers). Figure 4.11 ...
... E. Coli colonizes the intestine by using the fimbriae to attach to each other and the cells lining of the intestinal track Biofilms! (plaque on teeth or scum in showers). Figure 4.11 ...
Reflection - Animated Science
... In this case the two waves would cancel each other out - one says that destructive interference has occurred. At a point of constructive interference the net amplitude of the two waves is a maximum, whereas at a point of destructive interference, the net amplitude is a minimum. Of course, one could ...
... In this case the two waves would cancel each other out - one says that destructive interference has occurred. At a point of constructive interference the net amplitude of the two waves is a maximum, whereas at a point of destructive interference, the net amplitude is a minimum. Of course, one could ...
NOTES - Ch. 8 - Photosynthesis
... Why is this? Even though ATP is very efficient at transferring energy, it is not very good for storing large amounts of energy over the long term. In fact, a single molecule of the sugar glucose stores more than 90 times the chemical energy of a molecule of ATP. Therefore, it is more efficient for c ...
... Why is this? Even though ATP is very efficient at transferring energy, it is not very good for storing large amounts of energy over the long term. In fact, a single molecule of the sugar glucose stores more than 90 times the chemical energy of a molecule of ATP. Therefore, it is more efficient for c ...
Chapter 20-Light The Nature of Light Visible Light Is a Form of
... b. Sun is a natural source of light and chief source c. Stars are natural source of light ...
... b. Sun is a natural source of light and chief source c. Stars are natural source of light ...
Light Sources and Interaction of Light With Matter
... What is it and how does it work? Electroluminescence is an optical phenomenon and electrical phenomenon where a material such as a natural blue diamond emits light when an electric current is passed through it.Electroluminescence (EL) is mainly observed in semiconductors. semiconductors. The electri ...
... What is it and how does it work? Electroluminescence is an optical phenomenon and electrical phenomenon where a material such as a natural blue diamond emits light when an electric current is passed through it.Electroluminescence (EL) is mainly observed in semiconductors. semiconductors. The electri ...
EM Waves and Color
... Will an EM wave speed up or slow down when going from air to water? It will slow down. Which type of medium will allow a sound wave to have the greatest KE? In a solid (an elastic solid) b/c the molecules are closer together. Sound requires a medium to transfer the energy. ...
... Will an EM wave speed up or slow down when going from air to water? It will slow down. Which type of medium will allow a sound wave to have the greatest KE? In a solid (an elastic solid) b/c the molecules are closer together. Sound requires a medium to transfer the energy. ...
Bioluminescence
Bioluminescence is the production and emission of light by a living organism. It is a form of chemiluminescence. Bioluminescence occurs widely in marine vertebrates and invertebrates, as well as in some fungi, microorganisms including some bioluminescent bacteria and terrestrial invertebrates such as fireflies. In some animals, the light is produced by symbiotic organisms such as Vibrio bacteria.The principal chemical reaction in bioluminescence involves the light-emitting pigment luciferin and the enzyme luciferase, assisted by other proteins such as aequorin in some species. The enzyme catalyzes the oxidation of luciferin. In some species, the type of luciferin requires cofactors such as calcium or magnesium ions, and sometimes also the energy-carrying molecule adenosine triphosphate (ATP). In evolution, luciferins vary little: one in particular, coelenterazine, is found in nine different animal (phyla), though in some of these, the animals obtain it through their diet. Conversely, luciferases vary widely in different species. Bioluminescence has arisen over forty times in evolutionary history.Both Aristotle and Pliny the Elder mentioned that damp wood sometimes gives off a glow and many centuries later Robert Boyle showed that oxygen was involved in the process, both in wood and in glow-worms. It was not until the late nineteenth century that bioluminescence was properly investigated. The phenomenon is widely distributed among animal groups, especially in marine environments where dinoflagellates cause phosphorescence in the surface layers of water. On land it occurs in fungi, bacteria and some groups of invertebrates, including insects.The uses of bioluminescence by animals include counter-illumination camouflage, mimicry of other animals, for example to lure prey, and signalling to other individuals of the same species, such as to attract mates. In the laboratory, luciferase-based systems are used in genetic engineering and for biomedical research. Other researchers are investigating the possibility of using bioluminescent systems for street and decorative lighting, and a bioluminescent plant has been created.