| slovo | definícia |
Benzyl
(gcide) | Benzyl \Ben"zyl\, n. [Benzoic + -yl.] (Chem.)
A compound radical, C6H5.CH2, related to toluene and
benzoic acid; -- commonly used adjectively.
[1913 Webster] |
benzyl
(wn) | benzyl
n 1: the univalent radical derived from toluene [syn: benzyl,
benzyl group, benzyl radical] |
| | podobné slovo | definícia |
chlorobenzylidenemalononitrile
(encz) | chlorobenzylidenemalononitrile, n: |
benzyl penicillin
(gcide) | penicillin \pen`i*cil"lin\ (p[e^]n`[i^]*s[i^]l"l[i^]n), n. [From
Penicillium, the fungus genus from which it was first
isolated.] (Chem.)
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 "penicillin".
[PJC]
Note: [hand]The characteristic portion of the structure
characterizing a penicillin is the bicyclic structure
3,3-Dimethyl-7-oxo-4-thia-1-azabicylo[3.2.0]heptane-2-carboxylic
acid. The different penicillins have varying acyl
groups forming an amide bond with a nitrogen attached
to the 6-carbon of this nucleus. This distinguishes it
from the other classes of beta-lactam antibiotic, the
cephalosporins, thienamycins and sulfazecin.
[PJC] |
benzylic
(gcide) | benzylic \ben*zyl"ic\ adj. (Chem.)
containing a benzyl group.
[WordNet 1.5] |
hydroxy-benzyl alcohol
(gcide) | Saligenin \Sa*lig"e*nin\, n. [Salicin + -gen.] (Chem.)
A phenol alcohol obtained, by the decomposition of salicin,
as a white crystalline substance; -- called also
hydroxy-benzyl alcohol.
[1913 Webster] |
benzyl
(wn) | benzyl
n 1: the univalent radical derived from toluene [syn: benzyl,
benzyl group, benzyl radical] |
benzyl group
(wn) | benzyl group
n 1: the univalent radical derived from toluene [syn: benzyl,
benzyl group, benzyl radical] |
benzyl radical
(wn) | benzyl radical
n 1: the univalent radical derived from toluene [syn: benzyl,
benzyl group, benzyl radical] |
benzylic
(wn) | benzylic
adj 1: relating to benzyl |
benzylpenicillin
(wn) | benzylpenicillin
n 1: the penicillin that constitutes the principal component of
many commercial antibiotics [syn: penicillin G,
benzylpenicillin] |
chlorobenzylidenemalononitrile
(wn) | chlorobenzylidenemalononitrile
n 1: a tear gas that is stronger than CN gas but wears off
faster; can be deployed by grenades or cluster bombs; can
cause skin burns and fatal pulmonary edema [syn:
chlorobenzylidenemalononitrile, CS gas] |
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