Beta - Law Dictionary Search Results
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Beta
The second letter of the Greek alphabet B beta See B and cf etymology of Alphabet...
Cephalosporin
any of a class of chemical substances some of which have therapeutically useful antibacterial activity whose structure contains a beta lactam ring fused to a six membered ring containing a sulfur and a nitrogen atom The first of the series cephalosporin C was discovered by G Brotzu in 1955 in the culture broth of a Cephalosporium species found off the coast of Sardinia Other cephalosporins have been found to be produced by species of soil bacteria actinomycetes Many semisynthetic analogs have been tested for antibacterial effect and several of them have found use as important clinically useful antibacterial agents some of which may be taken orally for treatment of bacterial infections The cephalosporins are the second class of beta lactam antibiotic to be discovered the first being the penicillins and more recent classes being the thienamycins and sulfazecins The cephamycins are a variant of cephalosporins with a methoxyl group on the beta lactam ring rendering them more resistant to p...
digitoxin
A steroid glycoside one of the cardiotonic chemical substances which is extracted from the foxglove It is a white crystalline substance C41H64O13 and is a 3 substituted triglucoside of a steroid related structurally to digitalin and digoxin It is used as a cardiotonic for treatment of certain heart conditions such as congestive heart failure Chemically it is 3beta5beta 3 O 26 Dideoxy beta D ribo hexopyranosyl 1rarr4 O 26 dideoxy beta D ribo hexopyranosyl 1rarr4 26 dideoxy beta D ribo hexopyranosyloxy 14 hydroxy card 2022 enolide The related compounds digitalin and digoxin are also extracted from the foxglove Digitalis lanata and Digitalis purpurea The class of steroid glycosides having cardiotonic properties are refered to as the cardiac glycoside group...
digoxin
a steroid glycoside one of the cardiotonic chemical substances which is extracted from the foxglove It is a white crystalline substance C41H64O14 and is a 3 substituted triglucoside of a steroid related structurally to digitalin and digitoxin It is used as a cardiotonic for treatment of certain heart conditions such as congestive heart failure Chemically it is 3beta5beta12beta 3 O 26 Dideoxy beta D ribo hexopyranosyl 1 4 O 26 dideoxy beta D ribo hexopyranosyl 1 4 26 dideoxy beta D ribo hexopyranosyloxy 1214 dihydroxy card 2022 enolide The related compounds digitalin and digoxin are also extracted from the foxglove Digitalis lanata and Digitalis purpurea The class of steroid glycosides having cardiotonic properties are refered to as the cardiac glycosides...
lactose
The main sugar present in milk called also sugar of milk or milk sugar When isolated pure it is obtained crystalline it is separable from the whey by evaporation and crystallization It is a disaccharide with the formula C12H22O11 being chemically 4 beta D galactosido D glucose It has a slightly sweet taste is dextrorotary and is much less soluble in water than either cane sugar or glucose Formerly called lactin When hydrolyzed it yields glucose and galactose In cells it may be hydrolyzed by the enzyme beta galactosidase...
penicillin
Any of a variety of substances having a structure containing a beta lactam ring fused to a thiirane ring to which a carboxyl group is attached but most commonly interpreted as benzyl penicillin They are notable as powerful antibacterial agents of relatively low toxicity which have found extensive use in medicine for treating bacterial infections They are categorized as one of the classes of beta lactam antibiotic They are produced naturally by some fungi and bacteria and industrial production processes almost invariably start from some form of the penicillin nucleus produced by fermentation of microorganisms The fermentation products are then chemically modified to produce derivatives of enhanced potency safety or antibacterial spectrum The first penicillin to see extensive use clinically during World War II was penicillin G also called benzypenicillin and commonly simply ldquopenicillinrdquo...
Becquerel rays
Radiations first observed by the French physicist Henri Becquerel in working with uranium and its compounds They consist of a mixture of alpha beta and gamma rays...
Beet
A biennial plant of the genus Beta which produces an edible root the first year and seed the second year...
Beetrave
The common beet Beta vulgaris...
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