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- binary coded decimal (BCD): A binary number system in which each decimal digit from 0 to 9 is represented by four binary digits (bits). The four positions have a weighted value of 1, 2, 4, and 8, respectively, starting from...>more
- binary number system: A base 2 number system that uses only the numbers 0 and 1 to express all values. Each digit position of a binary number has a weighted value of 1, 2, 4, 8, 16, 32, 64, and so on, starting with...>more
- Binaural: A headset style that has 2 speakers-1 for each ear. Because having both ears covered allows the user to more fully concentrate on the caller without being distracted, a binaural headset is...>more
- Binder: A binder is an implement that was pulled by draft animals. It cut wheat, tied it into a bundle and deposited it on the ground where workers would pick it up and manually take it to the threshing...>more
- Binge eating: Compulsive eating pattern characterized by eating an excessive amount of food within a short period of time. People with binge-eating disorder experience frequent episodes of out-of-control...>more
- Bio-fuels: Bio-fuels are non-fossil fuels, produced from agriculture sources, residues, and waste. Bio-ethanol refers to ethanol produced from crops (e.g., corn-ethanol and sugar-ethanol) Biofuel...>more
- Bio-holographic Memory: Using the laser in order to record given in proteins microstacks, investigators of the University of Connecticut have shown as it will be possible to produce riscrivibili bio-holographic memories....>more
- Bioaccumulation: The increase in concentration of a chemical in organisms that live in environments contaminated with low concentrations of certain organic compounds or heavy metals such as lead and mercury....>more
- Bioassay: Bioassay is the determination of the activity or concentration of a chemical by its effect on the growth of an organism under experimental conditions. another definition: The determination of...>more
- Bioavailability: The percent of dose entering the systemic circulation after administration of a given dosage form. More explicitly, the ratio of the amount of drug "absorbed" from a test formulation to the amount...>more
- Biocapacity: Biocapacity refers to the capacity of a given biologically productive area to generate an on-going supply of renewable resources and to absorb its spillover wastes. Unsustainability occurs if...>more
- BIOCATALYSIS IN OIL REFINING, 164: M. Ramirez-Corredores , Refining Technologies, BP International Ltd., Sunbury-on-Thames, U.K. Abhijeet Borole , Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, U.S.A....>more
- Biocatalyst: A substance, such as an enzyme, that initiates or modifies the rate of a biological process and is generally consumed in that process (in contrast with a chemical catalyst, which accelerates a...>more
- Biochemical: A product by or involving a chemical reaction in a living organism. Biochemistry is the application of chemistry to living beings. A few general research areas of biochemistry include analysis of...>more
- Biochemistry: The study of the chemical processes and compounds occurring in living organisms. Details... Biochemistry is the study of the chemical processes in living organisms . [1] The word...>more
- Biochip: A biochip refers to a collection of miniaturized test sites, or microarrays, arranged on a solid substrate that permits many tests to be performed at the same time in order to achieve higher...>more
- Biocide: A chemical substance that kills living organisms. The designation is usually used to include materials that can kill desirable as well as undesirable organisms (e.g. pesticides are designed to kill...>more
- Biocoenosis: Varied community of organisms living in the same small area, e.g. in the bark of a tree, on a wall, in a pond. Association of living organisms, animals and plants, which occupy the same...>more
- Bioconcentration: The accumulation of a chemical in tissues of a fish or other organism to levels greater than that in the surrounding medium (environment). Related words: bioaccumulation -...>more
- Bioconversion: Chemical restructuring of organic materials, like plants or waste products, into useable substances by using a biological agent. The biocatalyst used to modify the chemical could be an enzyme,...>more
- Biodegradation: The metabolic breakdown by living organisms of materials into simpler components. The degradation is usually performed by bacteria or microbes, referred to as decomposers. It is a fundamental...>more
- BIODEGRADATION AND BIOREMEDIATION: To order this title, and for more information, click here Second Edition By Martin Alexander , Cornell University, Ithaca, New York, U.S.A. Description Biodegradation has been...>more
- Biodiesel: Biodiesel is the name given to a group of fuels which can be made from virtually any vegetable oil or animal fat. The raw oils must be modified to reduce their viscosity and lower their boiling...>more
- Biodiesel: Biodiesel refers to a diesel -equivalent processed fuel derived from biological sources (such as vegetable oils ) which can be used in unmodified diesel-engine vehicles. It is distinguished...>more
- Biodiversity: The sum of all genetic pools of species and ecosystems existing on the Earth. Biodiversity allows species and population to work out mechanisms for establishing better relationships between each...>more
- Biodiversity: Biodiversity is the term used to describe the existence of a wide variety of species in a particular area or during a specific period of time. >more
- Biodiversity: The variety of species (species diversity) or other taxa of animals, micro-organisms and plants in a natural community or habitat, or of communities in a particular environment (ecological...>more
- Bioenergy: Useful, renewable energy produced from organic matter. The conversion of the complex carbohydrates in organic matter to energy. Organic matter may either be used directly as a fuel or processed...>more
- Bioerosion: The erosion of material such as coral rock and shells, that results from the direct action of living organisms such as boring sponges, fungi, worms, molluscs, or sea urchins. Another definition:...>more
- Biofuel: Biofuel can be broadly defined as solid, liquid, or gas fuel consisting of, or derived from biomass . The definition used here is narrower: biofuel is defined as liquid or gas transportation...>more
- Biogas: Mixture of gases (mainly methane gas) produced during the anaerobic decomposition of the remains of organic wastes by bacteria. It is produced in large quantities in landfills, where it can be...>more
- BIOGEOCHEMISTRY: An Analysis of Global Change To order this title, and for more information, click here Second Edition By W.H. Schlesinger , Duke University, Durham, NC, USA Description For the...>more
- Biogeography: Biogeograohy is the scientific study of the geographic distribution of organisms. Another definition: A branch of geography that deals with the geographical distribution of animals and plants. >more
- Bioinformatica and microevolution: One of the most popular scientific metaphors, "the tree of the life", with its evoluzionari coppers and roots, with groups of bacteria low and multicellular organisms up, stà in order to yield...>more
- Bioinformatica, via to the games: When Eric Olson was one student to the University of Washington, she abandoned various plans because of the difficulty of management of the data. Therefore, with to of the colleagues, decided...>more
- Bioinformatics: A combination of information technologies to analyze biological information (including genome sequences, protein sequence, genetic information, RNA sequences, RNA expression data, etc.)....>more
- Bioinformatics: A scientific discipline that comprises all aspects of the gathering, storing, handling, analysing, interpreting and spreading of biological information. Involves powerful computers and innovative...>more
- Biolistics: Biolistics is a genetic engineering technique where particles are accelerated to deliver genetic material directly into the cells of a plant. >more
- Biologic intake: The process by which a substance crosses the outer boundary of an organism without passing an absorption barrier, e.g. through ingestion or inhalation . A measure of exposure expressed as a...>more
- Biologic uptake: The transfer of substances from the environment to plants, animals, and humans.The process by which a substance crosses an absorption barrier and is absorbed into the body. Related words:...>more
- Biological control: Controlling plants, diseases, and animal pests using natural enemies; or inhibiting the reproduction of pests by methods that result in the laying of infertile eggs, etc. >more
- Biological control agent: The use of living organisms to control pests or disease. May be a single organism or a combination of a number of different ones. A natural enemy, antagonist or competitor, and other...>more
- Biological diversity: (wildlife science) Richness and abundance of species, and variety of natural communities. Both the number of species and the number of individuals within each species are important in considering...>more
- Biological half life: The term which is used for the time required for the amount of a particular substance to be reduced to one half of its value when the rate of decay is exponential. Radioactive half-life refers...>more
- Biological pesticide (biopesticide): A generic term, not specifically definable, but generally applied to a biological control agent, usually a pathogen, formulated and applied in a manner similar to a chemical pesticide, and...>more
- Biological resources: Biological resources include genetic resources, organisms or parts thereof, populations, or any other biotic component of ecosystems with direct, indirect or potential use or value for humanity. >more
- Biological Revolution: The biological revolution refers to the innovations in the genetic development of seeds through recombinant DNA procedures.>more
- Biological Treatment: Treatment of waste water to remove or reduce organic contaminants using decomposing bacteria. The traditional treatments use aerobic bacteria, to mineralize the organic contaminants to carbon...>more
- Biologics: Any virus, therapeutic serum, toxin, antitoxin, or analogous product used in the prevention, treatment or cure of diseases or injuries in humans. Another definition: Vaccines, therapeutic...>more
- BIOLOGY OF THE NITROGEN CYCLE: To order this title, and for more information, click here Edited By Hermann Bothe , Botanical Institute, The University of Cologne, Koln, Germany Stuart Ferguson ,...>more
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