aid

Virus

...es develop in agricultural societies and regularly aid those societies when they expand into the territories of non-agricultural peoples. Of all types of virus, the most deadly are known as filovirus . The Filovirus group consists of Marburg , first discovered in 1967 in Marburg Germany, and ebola . ...

Stem cell

...ments to enable a paralyzed woman to walk with the aid of a walker. This was achieved by isolating the stem cells from the umbilical cord blood and injecting the cells into the damaged part of the woman's spinal cord. Work was done by Chosun University professor Song Chang-hun, Seoul National Universi...

Plant physiology

... External links Plant physiology online study aid Plant physiology scientific journal Bibliography Frank B. Salisbury, Cleon W. Ross Plant physiology Wadsworth, 1992. - ISBN 0534151620 undergraduate textbook in plant physiology...

Microsatellite

...ation machinery. Self-complementary sequences may aid this process. In tumour cells, where controls on replication may be damaged, microsatellites may be gained or lost at an especially high frequency during each round of mitosis . Hence a tumour cell line might show a different genetic fingerprint f...

Flagellum

...onent proteins associate spontaneously without the aid of enzymes or other factors. Both the basal body and the filament have a hollow core, through which the component proteins of the flagellum are able to move into their respective positions. The filament grows at its tip rather than at the base. The b...

Excretion

...on, urine may be safely used to dampen clothing to aid cooling. It is futile to attempt to drink it (or salty ocean water), as it requires more water from the body to excrete the salt than is available in the fluid. Some sea birds are able to efficently excrete excess salt through the tear ducts associat...

Equilibrium

...e of humans and animals is maintained with the aid of the sense of balance , and in special cases with a balance beam . See also the weighing instrument balance . Thermodynamic equilibrium , the state of a system in which its internal processes cause no net change in its macroscopic prope...

Electrophysiology

...to which the pipet is inserted (typically with the aid of a microscope and finely adjustable pipet holders, known as micromanipulators). The chloride-coated silver wire connects back to the amplifier. Classically, electrophysiologists watched biological currents/voltages on an oscilloscope and recorded...

Digestion

...estive enzymes such as salivary amylase , which aid in the breakdown of food, particularly carbohydra... mixed with secretions such as bile , which helps aid in fat digestion, and insulin , to process sugars . Most nutrient absorption takes place in the ...

Cladistics

...genies are increasingly often constructed with the aid of molecular data. Computational systematics allows the use of these large data sets to construct objective phylogenies. These can more accurately filter out true synapomorphy from parallel evolution. Cladistics does not assume any particular th...

Charles Darwin

...tic instincts of humans, which would allow them to aid the helpless, had developed due to natural selection, and to deny them would damage the "noblest part of our nature" for only a potential future benefit. "Hence we must bear without complaining the undoubtedly bad effects of the weak surviving and pr...

Affinity chromatography

... tagged with a known affinity ligand in order to aid their purification. That is to say that the molecule has an artificial trait imposed upon it by genetic modification which allows it to be selected for affinity binding (if the molecule is a protein these are called fusion proteins ). Such tags in...