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gas in Biological Definition

Ethyl alcohol

... Density 789 gram / L gas properties Δ f H 0 gas -235.3 kJ / mol S 0 gas 283 J/molK C p 65.21 J/molK ...

Fick's law of diffusion

... It states that the rate of diffusion of a gas across a membrane is Constant for a given gas at a given temperature by an experimentally ... to the difference in partial pressures of the gas across the membrane , P 2 - P 1 ...

Lung

... accompanied by air sacs to control the flow of gas through it. See Bird#Respiration for a detailed ... the lungs, but do not play a direct role in gas exchange. They have a flow through respiration ... are simple balloon-like structures, with gas exchange limited to the outer surface area of the ...

Alcohol

... . Other alcohols are generally produced by synthetic routes from natural gas , oil , or coal feedstocks, for example via acid catalysed hydration ... temperature and pressure. Methanol is manufactured from synthesis gas , where CO + 2 H 2 are combined to produce methanol using a Cu , ZnO and ...

Chromatography

... A chromatograph takes a chemical mixture carried by liquid or gas and separates it into its component parts as a result of differential ... complex mixtures rely on the differential affinities of substances for a gas or liquid mobile medium and for a stationary adsorbing medium through ...

Escherichia coli

... , rod-shaped bacteria that ferment lactose with the production of gas within 48 hours at 35C (in the body, this gas is released as flatulence ). In the fields of water purification and ...

Turgor

... the formula where M is the molarity R is the molar gas constant T is absolute temperature (i.e. measured in kelvin ). Note the similarity of the above formula to the ideal gas law . See also Pfeffer cell cell wall ...

Absorption spectrum

... An absorption spectrum is a diagram depicting the wavelengths of electromagnetic radiation absorbed by a material, usually a gas . It can be regarded as the opposite to an emission spectrum , which is a depiction of the specific wavelengths emitted by a material. Let us ...

Botany

... fibres , fuel and medicine that allow higher life forms to exist. While doing all this, plants also absorb carbon dioxide , an important greenhouse gas , through photosynthesis . A good understanding of plants is crucial to the future of our society as it allows us to: Feed the world ...

Crassulacean acid metabolism

... down during the day for sugars. These plants can close their stomata during the day. These plants close their stomata (tiny pores used for gas exchange) during the day in order to conserve water. Normally, they wouldn't be able to carry out photosynthesis , since carbon dioxide from the air ...

Crassulacean acid metabolism

... down during the day for sugars. These plants can close their stomata during the day. These plants close their stomata (tiny pores used for gas exchange) during the day in order to conserve water. Normally, they wouldn't be able to carry out photosynthesis , since carbon dioxide from the air ...

Diffusion

... Carbon dioxide bubbles in soft drinks start as small nuclei and grow because of the diffusion of carbon dioxide molecules towards them. A smelly gas distributes itself over a room by diffusion. A sugar cube in a glass of water that is not stirred will dissolve slowly and the sugar molecules will ...

Photosynthesis

... from inorganic compounds, instead of eating other organisms or relying on material derived from them. Most notably, they use carbon dioxide gas and water to produce sugars and oxygen gas. The energy for these processes comes from photosynthesis. For instance, the over-all equation for the ...

Leaf

... It forms the boundary between the plant and the external world. The epidermis serves several functions: protection against water loss, regulation of gas exchange, secretion of metabolic compounds, and (in some species) absorption of water. Most leraves show dorsoventral anatomy: the upper (adaxial) ...

Osmosis

... the chemical potential. For the case of an ideal solution the reduction in chemical potential corresponds to: where R is the ideal gas constant , T is the temperature and x 2 is the solute concentration in terms of mole fraction . Most real solutions approximate ideal ...

Redox

... used in organic chemistry, primarily in the reduction of carbonyl compounds to alcohols . Another useful method is reductions involving hydrogen gas (H 2 ) with a palladium, platinium or nickel catalyst. These catalytic reductions are primarily used in the reduction of carbon-carbon double or ...

Photosynthesis

... from inorganic compounds, instead of eating other organisms or relying on material derived from them. Most notably, they use carbon dioxide gas and water to produce sugars and oxygen gas. The energy for these processes comes from photosynthesis. For instance, the over-all equation for the ...

Primer

... is the entropy of base stacking adjusted for helix initiation factors and for the contributions of salts to the entropy R is the universal gas constant Also, a primer should not easily anneal with itself or others of its kind, building loops or hairpins in the process. This could ...

Redox

... used in organic chemistry, primarily in the reduction of carbonyl compounds to alcohols . Another useful method is reductions involving hydrogen gas (H 2 ) with a palladium, platinium or nickel catalyst. These catalytic reductions are primarily used in the reduction of carbon-carbon double or ...

Reduction

... oxidation, i.e. the formal oxidation state of an atom (independent or within a molecule ) is reduced by the addition of electrons . A reduced gas is thus hydrogen -rich. In philosophy , reduction is the process of explaining a particular phenomenon or subject matter in terms of ...

Signal transduction

... of inositol triphosphate and diacylglycerol . Others are ceramide and lysophosphatic acid . Nitric oxide (NO) as second messenger The gas nitric oxide is a free radical which diffuses through the plasma membrane and affects nearby cells. NO is made from arginine and oxygen by the ...

Stoma

... , a stoma (also stomate ; plural stomata ) is a tiny opening or pore , found mostly on the undersurface of a plant leaf , and used for gas exchange. Air containing carbon dioxide and oxygen enters the plant through these openings where it gets used in photosynthesis and ...
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