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Solution in Biological Definition

Dialysis

... the body. In peritoneal dialysis , a special solution is run through a tube into the peritoneal cavity ... dialysis fluid (also called dialysis solution), a solution comprised of a known amount of a glucose dissolved in water. The strength of this solution determines the osmotic gradient, and therefore ...

Fehling's solution

... Fehling's solution is a solution used to detect aldehyde functional groups . ... von Fehling . Preparation Fehling's solution is always made just prior to the test. Two equal ...

Fitness landscape

... one has to define for every possible solution s to the problem of interest (i.e., every ... on route s . The best, or at least a very good, solution is then found in the following way. Initially, a ... for those with higher fitness, until a satisfying solution has been found. Evolutionary optimization ...

Macromolecule

... too small to see, individual pieces of DNA in solution can be broken in two simply by suctioning the solution through an ordinary straw. This is not true of ... denature if the solute concentration of their solution is too high or too low. According to IUPAC ...

Molecular biology

... then eluted from the matrix, usually by adding a solution with a high salt concentration, or by varying the pH of the solution in which the matrix is contained. The beads can either be suspended in solution (batch processing) or packed into a tube (column ...

Osmosis

... flows from the side of the membrane where the solution is weakest to the side where it is strongest, until the solution on both sides of the membrane is the same ... plant leaves. When a plant cell is placed in a solution higher in solutes than inside the cell osmosis ...

Osmoregulation

... measure of the tendency of water to move into one solution from another by osmosis. The higher the osmotic pressure of a solution the more water wants to go into the solution. ... Examples of osmotic pressure Hypertonic is a solution with higher solute concentration (higher osmotic ...

Plasmolysis

... cell in a strongly saline (salty) or sugary solution , so that water is lost by osmosis . If onion epidermal (outer) tissue is immersed in a solution of calcium nitrate , cells rapidly lose water by ... center of the cell originally contains a dilute solution with much lower osmotic pressure than that of the ...

Protein

... state , in a small range of pH values and under solution conditions with a minimum quantity of electrolytes , as many proteins will not remain in solution in distilled water . A protein that loses its ... were interconvertible, that by careful control of solution conditions (by for example, dialyzing away a ...

Blood

... to be degraded and to the kidney to be excreted in urine . A buffer solution of carbonic acid (H 2 CO 3 ) and bicarbonate (HCO 3 - ) is present ... involved in inflammation . Blood plasma is essentially an aqueous solution containing 96% water, 4% blood plasma proteins , and trace amounts of ...

Electrophysiology

... and no ionic contribution from the microelectrode, the chloride solution is replaced with cerralow, a low melting temperature alloy. The tip is ... the chemical composition of the oxidized components inside of biological solution being studied. It is typically employed for studing the neural exocytosis ...

Glucose

... polymers ( polysaccharides ). The older name dextrose arose because a solution of D -glucose rotates polarised light towards the right. In the same vein D - fructose was called "levulose" because a solution of levulose rotates polarised light to the left. Contents ...

Insulin

... able to with the appropriate pump. An insulin pump is a reasonable solution for some. However there are several major limitations - cost, the ... substances. These delay absorption of the insulin, adjust the pH of the solution to reduce reactions at the injection site, and so on. Some recent insulins ...

Adenosine triphosphate

... directly, with the formation of pyrophosphate . This last reaction has the advantage of being an effectively irreversible process in aqueous solution . Reaction of ADP with GTP ADP + GTP ATP + GDP There is talk of using ATP as a power source for nanotechnology and implants. ...

Biodiversity

... of rare or endangered species' habitats sometimes requires ex-situ conservation efforts. Furthermore, ex-situ conservation can provide a backup solution to in-situ conservation projects. Some believe both types of conservation are required to ensure proper preservation. An example of an in-situ ...

Cellulose

... they are meshed into a carbohydrate matrix , helping keep plants rigid. Given a cellulose material, the portion that does not dissolve in a 17.5% solution of sodium hydroxide at 20 deg C. is Alpha Cellulose , which is true cellulose; the portion that dissolves and then precipitates upon acidification ...

Chlorophyll

... it to light for several hours. (Variegated leaves have green areas that contain chlorophyll and white areas that have none.) When tested with iodine solution , a color change revealing the presence of starch occurs only in regions of the leaf that were green and therefore contained chlorophyll. This shows ...

Chromatography

... In paper chromatography, chemical interactions with the paper make compounds travel at different rates. A small spot of solution containing the sample is applied to a strip of chromatography paper about one centimetre from the base. This sample is adsorbed onto the paper. ...

Competitive exclusion principle

... should be able to coexist on these resources. Nevertheless, large numbers of plankton species coexist within small regions of open sea. A partial solution to the paradox lies in raising the dimensionality of the system. Spatial heterogeneity , multiple resource competition , competition-colonization ...

Ethyl alcohol

... , paints and tinctures . Alcoholic drinks have a large variety of tastes because various flavor compounds are dissolved during brewing . A solution of 70-85% of ethanol is commonly used as a disinfectant . It kills organisms by denaturing their proteins and dissolving their lipids and is ...

Eugenics

... for this endeavor, and hoped that if social mores could change so that people could see the importance of breeding, at some point in the future a solution would be found. As for Darwin, he read his cousin's work with interest, but dismissed its goals as too " Utopian ." In his later work, The ...

His-tag

... has nickel bound to it. Histidine is a good ligand for nickel so the fusion protein will bind to the column. The protein can be eluted with a solution of imidazole . Detection The his tag can also be used in detection of the protein via anti-his-tag antibodies . This can be useful in ...

Photosynthesis

... energy. -- the purple membranes was one of the first to be used to demonstrate the chemiosmotic theory: light hit the membranes and the pH of the solution that contain the purple membranes dropped as protons were pumping out of the membranes! The ATP and NADPH produced by photosynthesis drive a ...

Kidney

... secreting other, unneeded molecules. Reabsorption and secretion are accomplished with both cotransport and countertransport mechanisms. The final solution is then excreted as urine . A nephron consists of an initial filtering component called the renal corpuscle (or Malpighian corpuscle ), and a ...

Louis Pasteur

... chirality and the polarization of light In his early work as a chemist he resolved a problem concerning the nature of tartaric acid ( 1849 ). A solution of this compound derived from living things (specifically, wine lees) rotated the plane of polarization of light passing through it. The mystery ...

Origin of life

... Astrobiology and the origins of life "SELF-REPLICATION: Even peptides do it" by Stuart A. Kauffman Cairns Smith illustration of a possible solution using crystalline behaviors of clays Model of origin of life involving zeolite, press release for PNAS paper The Birth of Complex Cells, ...

Photosynthesis

... energy. -- the purple membranes was one of the first to be used to demonstrate the chemiosmotic theory: light hit the membranes and the pH of the solution that contain the purple membranes dropped as protons were pumping out of the membranes! The ATP and NADPH produced by photosynthesis drive a ...

Starch

... be reapplied. Livestock Animal starch is the common name of glycogen . It is not the same as ordinary starch. Tests for Starch A solution of Iodine and Potassium iodide in water, when added to a sample containing starch (specifically amylose) will turn an intense blue-black colour, ...

Stoma

... lose huge amounts of water through transpiration. This problematic situation is known as the stoma paradox . A small group of plants evolved with a solution to the paradox; they open the stoma at night and store the carbon dioxide for use during the following day, allowing the stoma to close at dawn. ...

Turgor

... restricts the expansion, causing the cell to press against the wall. The resulting pressure is called turgor. The osmotic pressure π of a dilute solution can be calculated using the formula where M is the molarity R is the molar gas constant T is absolute temperature (i.e. ...

Xylem

... travels by bulk flow , like water in a series of pipes, rather than by diffusion through cells. Two phenomena cause xylem sap to flow: The soil solution (see soil ) is more dilute than the cytosol of the root cells. Thus, water moves osmotically into the cells, creating root pressure . Even ...
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