Antigen Antibody Antigen- antibody reaction Astringent Atom Avogadro's hypothesis
Pharmacologically active sub- stance.
A substance which reacts with the production of specific hu- moral or cellular immunity. A protein found principally in blood serum, originating either normally or in response to an antigen and characterized by a specific reactivity with its com- plimentary antigen.
The combination of an antigen with its antibody.
A medicine or other substance that checks discharges of blood, mucus etc.
The smallest particle of an element which can enter into a chemical combination. It is composed of subatomic par- ticles (protons, neutrons, elec- trons) whose number and ar- rangement characterize the ele- ment.
Under the same conditions of pressure and temperature equal volumes of all gases contain equal number of molecules.
Avogadro's number Bacteria Basophil Carcinogenesis Catalyst Catalysts (Auto): Compound Complex
The number of molecules in a gram molecular weight of a substance is 6.06 x 10~ (cor- rected value being 6.023 x 1023).
A class of microscopic unicellu- lar or filamentous agents and the cause of many diseases. A type of leucocytes that re- main coated with IgE (Immuno- globuline E), a protein anti- body.
Production and development of cancer.
Catalyst may be gases, liquids and solids. A small amount of catalyst can effect the conver- sion of a large amount of sub- stances — gases, liquids and solids.
Autocatalytic reactions are a separate class in which one of the reaction products acts cata- lytically.
A substance whose molecules consist of unlike atoms and whose constituents cannot be separated by physical means. A structural whole comprising interconnected parts specially characterized by an involved combination of parts, compli- cated, intricated. A substance composed of many ingredients.
Contraception : Prevention of conception or im- pregnation.
Cytotoxic : A substance developed in the blood serum and having a toxic effect upon cells.
Deuterium : Isotope of hydrogen of double mass due to one proton and one neutron (I)20 = Heavy water).
Doppler : Apparent change in the fre- quency of light or sound ob- served when the source and the observer are in motion relative to one another.
Elementary particle
: A particle which in the present state of knowledge cannot be described as compound, and is thus one of the fundamental constituents of a matter. Also known as fundamental particle.
Elementary character
Electrostatic
: Elementary character of an atom, however, does not change due to excess or deficiency of elec- tron, as because this is known to depend on the proton existing in the nucleus of the atom which cannot be easily separated. : Pertaining to electricity at rest,
such as an electric charge on an object.
Electrostatic field
: A time-independent electric field, such as that produced by stationary charges.
Electro-magnetic : Electro- magnetic field Electro- magnetic wave Empirical Enzyme Etiology Fallow Foliage Pertaining to phenomena in which electricity and magne- tism are related.
An electric or magnetic field or a combination of the two, as in an electro-magnetic wave. A travelling disturbance in space produced by the acceleration of an electric charge, comprising an electric field and a magnetic field at right angles to each other, both moving at the same velocity in a direction normal to the plane of the two fields. Depending on experience or observation alone, without due regard to science and theory. Any of a class of complex, naturally occurring organic sub- stances of unknown composi- tion that accelerates (catalyze) specific transformation of mate- rial in plants and animals. The investigation of the cause of any disease.
To plow, harrow and break up a land without seedling for the purpose of destroying weeds and insects and rendering it mellow.
Collectively, the mass of leaves or leafage of a plant as produced in nature.
Fusion : The combining of the nuclei or atoms under intense heat to release nuclear energy.
Fusion (Cold) : Same as above under room
temperature.
Fission : The splitting of a nucleus of a heavy atom into nuclei of lighter atom and the resultant release of energy.
Fundamental : Any subatomic particle as pro-
particles ton, neutron, electron, nutrino or muon. Quantum theory sug- gested to describe them quanti- tatively.
Gamma rays : Known as electro-magnetic waves similar to visible light (photon particles), but with very short wavelength (invisible), and no change in atomic weight or atomic number is caused by emission of gamma ray.
Gene : A discrete unit (that is each small part) of DNA (deoxyribo- nucleic acid) bound to a protein and arranged linearly in the threadlike structure known as 'chromosome'.
Genetics : The science of heredity etc. pertaining to genes. The unit of chromosome carries and trans- fers an inherited characteristic from parent to offspring and
determines the development of some particular character or trait in the offspring.
Gene mutation : Although generally quite stable,
a gene subjected to unusual stress, may undergo a sudden permanent change, known as mutation. A great many sub- stances are known to produce
• gene mutation.
Reverse mutations from a mu- tant to wild type allel is also said to occur.
Gene therapy To replace the defective genes by healthy ones.
Genetic Chemical synthesis of DNA
engineering sequences, application of DNA recombinant technology by en- zyme restriction nucleases, and construction of bacteria with hybrid plasm id.
Gram-molecule The quantity of a compound or element which has a weight in grams equal numerically to its molecular weight.
Hormone A specific product of the cells of one part, transported in the body fluid or the sap of an organism and producing a spe- cific effect on the activity of cells remote from its source.
Immunity State or power of resisting the development of a given disease.
Law of mass action
That the chemical action of a reacting substance is propor- tional at any moment to its active mass, which is usually considered as measured by the molecular concentration.
Metabolism The sum of the processes con- cerned in the building up of protoplasm and its destruction incidental to life.
Me V It is unit of energy commonly