| slovo | definícia |
6
(gcide) | 6 \6\ adj.
1. one more than five; denoting a quantity consisting of six
items or units; -- representing the number six as an
Arabic numeral.
Syn: six, vi, half dozen, half a dozen
[WordNet 1.5 +PJC] |
| | podobné slovo | definícia |
omega-6
(encz) | omega-6, n: |
omega-6 fatty acid
(encz) | omega-6 fatty acid, n: |
16
(gcide) | 16 \16\ adj.
Denoting a quantity consisting of one more than fifteen and
one less than seventeen; -- representing the number sixteen
as Arabic numerals
Syn: sixteen, xvi
[WordNet 1.5 +PJC] |
16th
(gcide) | 16th \16th\ adj.
1. coming next after the fifteenth in a series
Syn: sixteenth
[WordNet 1.5 +PJC] |
26
(gcide) | 26 \26\ adj.
1. denoting a quantity consisting of twenty-six items or
units; -- representing the number twenty-six as Arabic
numerals
Syn: twenty-six, xxvi
[WordNet 1.5 +PJC] |
26th
(gcide) | 26th \26th\ adj.
1. coming next after the twenty-fifth in a series
Syn: twenty-sixth
[WordNet 1.5 +PJC] |
6
(gcide) | 6 \6\ adj.
1. one more than five; denoting a quantity consisting of six
items or units; -- representing the number six as an
Arabic numeral.
Syn: six, vi, half dozen, half a dozen
[WordNet 1.5 +PJC] |
60
(gcide) | 60 \60\ adj.
1. one more than fifty-nine; denoting a quantity consisting
of sixty items or units; -- representing the number sixty
as an Arabic numeral.
Syn: sixty, lx, threescore
[WordNet 1.5 +PJC] 60 minutes n.
1.
Syn: hour, hr a period of time equal to 1/24th of a day.
[WordNet 1.5]
2.
a 1-hour television program broadcast once weekly on the
CBS television network since the 1970's. Its format is
that of a "news magazine" treating typically three topics
during each show, plus occasional commentary. [Proper
name]
Syn: Sixty Minutes
[PJC] |
60th
(gcide) | 60th \60th\ adj.
1. coming next after the fifty-ninth in a series
Syn: sixtieth
[WordNet 1.5 +PJC] |
6-methylionone
(gcide) | irone \i"rone\, irones \i"rones\, n.
A fragrant liquid substance, a mixture of several isomers of
the formula C14H22O, forming the essence of the violet
fragrance, commonly isolated from orris oil or from the
rhizomes of Iris. The main ingredient in violets is
[alpha]-irone, which occurs as both cis and trans
stereoisomers. Called also 6-methylionone.
[PJC] |
6-O-alpha-L-rhamnosyl-D-glucose
(gcide) | Rutinose \Rutinose.\
A disaccharide present in glycosides.
Note: It is prepared from rutin by hydrolysis with
rhamnodiastase. 6-O-[alpha]-L-rhamnosyl-D-glucose;
C12H22O10.
[PJC] |
6th
(gcide) | 6th \6th\ adj.
Coming next after the fifth in a series
Syn: sixth
[WordNet 1.5 +PJC] |
Al2CH36
(gcide) | Methide \Meth"ide\ (? or ?), n. [See Methyl.] (Chem.)
A binary compound of methyl with some element; as, aluminium
methide, Al2(CH3)6.
[1913 Webster] |
C10H16
(gcide) | Turpentine \Tur"pen*tine\ (t[^u]r"p[e^]n*t[imac]n), n. [F.
t['e]r['e]benthine, OF. also turbentine; cf. Pr. terebentina,
terbentina, It. terebentina, trementina; fr. L. terebinthinus
of the turpentine tree, from terebinthus the turpentine tree.
Gr. tere`binqos, te`rminqos. See Terebinth.]
A semifluid or fluid oleoresin, primarily the exudation of
the terebinth, or turpentine, tree (Pistacia Terebinthus),
a native of the Mediterranean region. It is also obtained
from many coniferous trees, especially species of pine,
larch, and fir.
[1913 Webster]
Note: There are many varieties of turpentine. Chian
turpentine is produced in small quantities by the
turpentine tree (Pistacia Terebinthus). Venice,
Swiss, or larch turpentine, is obtained from {Larix
Europaea}. It is a clear, colorless balsam, having a
tendency to solidify. Canada turpentine, or Canada
balsam, is the purest of all the pine turpentines (see
under Balsam). The Carpathian and Hungarian varieties
are derived from Pinus Cembra and Pinus Mugho.
Carolina turpentine, the most abundant kind, comes from
the long-leaved pine (Pinus palustris). Strasburg
turpentine is from the silver fir (Abies pectinata).
[1913 Webster]
Oil of turpentine (Chem.), a colorless oily hydrocarbon,
C10H16, of a pleasant aromatic odor, obtained by the
distillation of crude turpentine. It is used in making
varnishes, in medicine, etc. It is the type of the
terpenes and is related to cymene. Called also
terebenthene, terpene, etc.
Turpentine moth (Zool.), any one of several species of
small tortricid moths whose larvae eat the tender shoots
of pine and fir trees, causing an exudation of pitch or
resin.
Turpentine tree (Bot.), the terebinth tree, the original
source of turpentine. See Turpentine, above.
[1913 Webster]Camphene \Cam"phene\ (k[a^]m"f[=e]n or k[a^]m*f[=e]n"), n.
(Chem.)
One of a series of substances C10H16, resembling camphor,
regarded as modified terpenes.
[1913 Webster]Carvene \Car"vene\, n. [F. carvi caraway.]
An oily substance, C10H16, extracted from oil caraway.
[1913 Webster] |
C10H16N2O3S
(gcide) | biotin \bi"o*tin\ n.
a B vitamin (C10H16N2O3S) that aids in body growth; --
called also vitamin H and coenzyme R. It functions as a
coenzyme in many carboxylation reactions.
Note: Biotin binds tightly to the substance avidin, found in
raw egg-whites. Rats or chick on a diet high in raw
egg-white may develop skin lesions and retarded growth,
which can be prevented by adding biotin to the diet.
--[MI11]
Syn: .
[WordNet 1.5 +PJC] |
C10H16O
(gcide) | thujone \thu"jone\ (th[=u]"j[=o]n), n.
An oil, C10H16O, the chief constituent of cedar leaf oil
(thuja oil), which is obtained from the northern white cedar
(arbor vitae, Thuja occidentalis) or the western Red Cedar
(Thuja plicatis). It is a stimulant similar to camphor. It
is also called thujol, thuyol, absinthol, thuyone,
tanacetol, and tanacetone. --Stedman.
[PJC]Camphor \Cam"phor\ (k[a^]m"f[~e]r), n. [OE. camfere, F. camphre
(cf. It. canfora, Sp. camfora, alcanfor, LL. canfora,
camphora, NGr. kafoyra`), fr. Ar. k[=a]f[=u]r, prob. fr. Skr.
karp[=u]ra.]
1. A tough, white, aromatic resin, or gum, obtained from
different species of the Laurus family, esp. from
Cinnamomum camphara (the Laurus camphora of
Linn[ae]us.). Camphor, C10H16O, is volatile and
fragrant, and is used in medicine as a diaphoretic, a
stimulant, or sedative.
[1913 Webster]
2. originally, a gum resembling ordinary camphor, obtained
from a tree (Dryobalanops aromatica formerly
Dryobalanops camphora) growing in Sumatra and Borneo;
now applied to its main constituent, a terpene alcohol
obtainable as a white solid C10H18O, called also {Borneo
camphor}, Malay camphor, Malayan camphor, {camphor of
Borneo}, Sumatra camphor, bornyl alcohol, camphol,
and borneol. The isomer from Dryobalanops is
dextrorotatory; the levoratatory form is obtainable from
other species of plants, and the racemic mixture may be
obtained by reduction of camphor. It is used in perfumery,
and for manufacture of its esters. See Borneol.
[1913 Webster +PJC]
Note: The name camphor is also applied to a number of bodies
of similar appearance and properties, as {cedar
camphor}, obtained from the red or pencil cedar
(Juniperus Virginiana), and peppermint camphor, or
menthol, obtained from the oil of peppermint.
[1913 Webster]
Camphor oil (Chem.), name variously given to certain
oil-like products, obtained especially from the camphor
tree.
Camphor tree, a large evergreen tree ({Cinnamomum
Camphora}) with lax, smooth branches and shining
triple-nerved lanceolate leaves, probably native in China,
but now cultivated in most warm countries. Camphor is
collected by a process of steaming the chips of the wood
and subliming the product.
[1913 Webster] |
C10H16O4
(gcide) | Camphoric \Cam*phor"ic\, a. [Cf. F. camphorique.] (Chem.)
Of, pertaining to, or derived from, camphor.
[1913 Webster]
Camphoric acid, a white crystallizable substance,
C10H16O4, obtained from the oxidation of camphor.
[1913 Webster]
Note: Other acids of camphor are campholic acid, C10H18O2,
and camphoronic acid, C9H12O5, white crystallizable
substances.
[1913 Webster] |
C10H6O2
(gcide) | Naphthoquinone \Naph`tho*qui"none\, n. [Naphthalene + quinone.]
(Chem.)
A yellow crystalline substance, C10H6O2, analogous to
quinone, obtained by oxidizing naphthalene with chromic acid.
[1913 Webster] |
C10H6O3
(gcide) | Juglone \Ju"glone\, n. [L. juglans the walnut + -one.] (Chem.)
A yellow crystalline substance (C10H6O3) resembling
quinone, extracted from green shucks of the walnut ({Juglans
regia}); -- called also nucin. Chemically, it is
5-hydroxy-1,4-naphthalenedione.
[1913 Webster] |
C12H26
(gcide) | Dodecane \Do"de*cane\, n. [Gr. ? twelve.] (Chem.)
Any one of a group of thick oily hydrocarbons, C12H26, of
the paraffin series.
[1913 Webster] |
C13H26
(gcide) | Tridecatylene \Tri`de*cat"y*lene\
(tr[-i]`d[-e]*k[a^]t"[i^]*l[=e]n), n. [Pref. tri-+ Gr.
de`katos tenth + E. ethylene.] (Chem.)
A hydrocarbon, C13H26, of the ethylene series,
corresponding to tridecane, and obtained from Burmah
petroleum as a light colorless liquid; -- called also
tridecylene, and tridecene.
[1913 Webster] |
C14H17NO6
(gcide) | Indican \In"di*can\, n. [See Indigo.]
[1913 Webster]
1. (Chem.) A glucoside (C14H17NO6) obtained from woad
(indigo plant, Isatis Tinctoria) and other plants (see
indigo), as a yellow or light brown sirup. When purified
it is obtained as spear-shaped crystals. It has a nauseous
bitter taste. By the action of acids, enzymes, etc., it
breaks down into sugar and indigo. It is the source of
natural indigo. Chemically it is the 3-glucoside of
indole, H-indol-3-yl-[beta]-D-glucopyranoside.
[1913 Webster +PJC]
2. (Physiol. Chem.) An indigo-forming substance, found in
urine, and other animal fluids, and convertible into red
and blue indigo (urrhodin and uroglaucin). Chemically, it
is indoxyl sulphate of potash, C8H6NSO4K, and is derived
from the indol formed in the alimentary canal. Called also
uroxanthin.
[1913 Webster] |
C14H6O2OH2
(gcide) | Alizarin \A*liz"a*rin\, Alizarine \A*liz"a*rine\, n. [F.
alizarine, fr. alizari.] (Chem.)
A coloring principle, C14H6O2(OH)2, found in madder, and
now produced artificially as an an orange-red crystalline
compound from anthracene. It is used in making red pigments
(such as the Turkish reds), and in dyeing.
[1913 Webster WordNet 1.5] |
C15H14O6
(gcide) | Catechin \Cat"e*chin\, n. (Chem.)
One of the tannic acids (C15H14O6), extracted from
catechu as a white, crystalline substance; -- called also
catechuic acid, catechinic acid, cyanidol, and
catechuin. It is a flavonoid found generally in higher
woody plants, and is used in dyeing and tanning.
[1913 Webster +PJC] |
C15H26
(gcide) | Quindecone \Quin*dec"one\, n. [L. quindecim fifteen.] (Chem.)
An unsaturated hydrocarbon, C15H26, of the valylene series,
produced artificially as an oily liquid. [Written also
quindekone.]
[1913 Webster] |
C16H10
(gcide) | Pyrene \Py"rene\, n. [Gr. ? fire.] (Chem.)
One of the less volatile hydrocarbons of coal tar, obtained
as a white crystalline substance, C16H10.
[1913 Webster] |
C16H10N2O2
(gcide) | Indigo \In"di*go\, a.
Having the color of, pertaining to, or derived from, indigo.
[1913 Webster]
Indigo berry (Bot.), the fruit of the West Indian shrub
Randia aculeata, used as a blue dye.
Indigo bird (Zool.), a small North American finch
(Cyanospiza cyanea). The male is indigo blue in color.
Called also indigo bunting.
Indigo blue.
(a) The essential coloring material of commercial indigo,
from which it is obtained as a dark blue earthy powder,
with a reddish luster, C16H10N2O2, which may be
crystallized by sublimation. Indigo blue is also made
from artificial amido cinnamic acid, and from artificial
isatine; and these methods are of great commercial
importance. Called also indigotin.
(b) A dark, dull blue color like the indigo of commerce.
Indigo brown (Chem.), a brown resinous substance found in
crude indigo.
Indigo copper (Min.), covellite.
Indigo green, a green obtained from indigo.
Indigo plant (Bot.), a leguminous plant of several species
(genus Indigofera), from which indigo is prepared. The
different varieties are natives of Asia, Africa, and
America. Several species are cultivated, of which the most
important are the Indigofera tinctoria, or {common
indigo plant}, the Indigofera Anil, a larger species,
and the Indigofera disperma.
Indigo purple, a purple obtained from indigo.
Indigo red, a dyestuff, isomeric with indigo blue, obtained
from crude indigo as a dark brown amorphous powder.
Indigo snake (Zool.), the gopher snake.
Indigo white, a white crystalline powder obtained by
reduction from indigo blue, and by oxidation easily
changed back to it; -- called also indigogen.
Indigo yellow, a substance obtained from indigo.
[1913 Webster] |
C16H12O5
(gcide) | brasilein \bra*sil"e*in\, C16H12O5, to which brazilwood owes
its dyeing properties.
[Webster 1913 Suppl.] Brasque \Brasque\, n. [F.] (Metal.)
A paste made by mixing powdered charcoal, coal, or coke with
clay, molasses, tar, or other suitable substance. It is used
for lining hearths, crucibles, etc. Called also steep.
[Webster 1913 Suppl.] |
C16H12O6
(gcide) | Hematein \Hem`a*te"in\, n. [Gr. ?, ?, blood.] (Chem.)
A reddish brown or violet crystalline substance, C16H12O6,
got from hematoxylin by partial oxidation, and regarded as
analogous to the phthaleins.
[1913 Webster] |
C16H14N2
(gcide) | Flavaniline \Fla*van"i*line\ (? or ?; 104), n. [L. flavus yellow
+ E. aniline.] (Chem.)
A yellow, crystalline, organic dyestuff, C16H14N2, of
artifical production. It is a strong base, and is a complex
derivative of aniline and quinoline.
[1913 Webster] |
C16H14O5
(gcide) | brasilin \bras"i*lin\, n. [Cf. F. br['e]siline. See 2d
Brazil.] (Chem.)
A substance, C16H14O5, extracted from brazilwood as a
yellow crystalline powder which is white when pure. It is
colored intensely red by alkalies on exposure to the air,
being oxidized to |
C16H14O6
(gcide) | Haematoxylin \H[ae]m`a*tox"y*lin\ (-t[o^]ks"[i^]*l[i^]n), n.
[See H[ae]matoxylon.] (Chem.)
The coloring principle of logwood. It is obtained as a yellow
crystalline substance, C16H14O6, with a sweetish taste.
Formerly called also hematin.
[1913 Webster] |
C16H18O10
(gcide) | fraxin \frax"in\, n. [From Fraxinus.] (Chem.)
A colorless crystalline substance (C16H18O10) found in the
bark of the ash (Fraxinus), and along with esculin in the
bark of the horse-chestnut. It is structurally a derivative
of a coumarin glucoside. It shows a delicate blue-green
fluorescence in alkaline solutions; -- called also paviin
and fraxoside. --MI-11br/
Syn:
8-([beta]-D-Glucopyranosyloxy)-7-hydroxy-6-methoxy-2H-1-benzopyran-2-one;
also,
7,8-dihydroxy-6-methoxy-coumarin-8-[beta]-D-glucoside;
fraxetin-8-glucoside.
[1913 Webster +PJC] |
C16H32
(gcide) | Cetene \Ce"tene\, n. [See Cete.] (Chem.)
An oily hydrocarbon, C16H32, of the ethylene series,
obtained from spermaceti.
[1913 Webster] |
C16H32O2
(gcide) | Palmitic \Pal*mit"ic\, a. (Physiol. Chem.)
Pertaining to, or obtained from, palmitin or palm oil; as,
palmitic acid (C16H32O2), a white crystalline substance
belonging to the fatty acid series. It is readily soluble in
hot alcohol, and melts to a liquid oil at 62[deg] C.
[1913 Webster] |
C16H33
(gcide) | Hexdecyl \Hex"de*cyl\, n. [Hex- + decyl.] (Chem.)
The essential radical, C16H33, of hecdecane.
[1913 Webster]Cetyl \Ce"tyl\, n. [Gr. ? whale + -yl.] (Chem.)
A radical, C16H33, not yet isolated, but supposed to exist
in a series of compounds homologous with the ethyl compounds,
and derived from spermaceti.
[1913 Webster] |
C16H33OH
(gcide) | ethal \eth"al\, n. [Ether + alcohol: cf. F. ['e]thal.] (Chem.)
A white waxy solid, C16H33.OH; -- called also {cetyl
alcohol} and cetylic alcohol. See Cetylic alcohol, under
Cetylic.
[1913 Webster] |
C16H34
(gcide) | Hecdecane \Hec"de*cane\, n. [Gr. ? six + ? ten.] (Chem.)
A white, semisolid, spermaceti-like hydrocarbon, C16H34, of
the paraffin series, found dissolved as an important
ingredient of kerosene, and so called because each molecule
has sixteen atoms of carbon; -- called also hexadecane.
[1913 Webster] |
C19H16ClNO4
(gcide) | indomethacin \in`do*meth"a*cin\, n. (Chem., Med.)
A nonsteroidal anti-inflammatory, antipyretic and analgesic
substance (C19H16ClNO4) prepared synthetically and used for
the treatment of pain and arthritis. It blocks prostaglandin
biosynthesis. Chemically, it is
1-(4-chlorobenzoyl)-5-methoxy-2-methyl-1H-indole-3-acetic
acid.
[PJC] |
C19H22O6
(gcide) | gibberellic acid \gibberellic acid\ n. (Chem.),
A plant growth hormone of the gibberellin series
(C19H22O6), also called gibberellin A3. It was first
isolated from the fungus Gibberella fujikuroi. It is used
to promote the growth of seedlings. See also gibberellin.
--MI11
[PJC] |
C20H16O3
(gcide) | Rosolic \Ro*sol"ic\, a. [Rose + carbolic.] (Chem.)
Pertaining to, or designating, a complex red dyestuff (called
rosolic acid) which is analogous to rosaniline and aurin. It
is produced by oxidizing a mixture of phenol and cresol, as a
dark red amorphous mass, C20H16O3, which forms weak salts
with bases, and stable ones with acids. Called also {methyl
aurin}, and, formerly, corallin.
[1913 Webster] |
C20H8O6
(gcide) | Cerulein \Ce*ru"le*in\, n. [L. caeruleus sky-blue.] (Chem.)
A fast dyestuff, C20H8O6, made by heating gallein with
strong sulphuric acid. It dyes mordanted fabrics green.
[Webster 1913 Suppl.] |
C21H36N7O16P3S
(gcide) | coenzyme A \co*en"zyme A`\ (k[-o]*[e^]n"z[imac]m [=a]`),
(Biochem.)
a coenzyme (C21H36N7O16P3S) that participates in the
transfer of acetyl groups in biochemical reactions; --
abbreviated CoA. It contains adenosine, phosphate,
pantothenic acid and cysteamine groups. The acetyl group to
be transferred during biosynthesis is temporarily attached to
the free sulhydryl of the cysteamine group to form a
thioester, in which state it is called acetyl coenzyme A. The
strength of a preparation of coenzyme A may be expressed by
the Lippman unit; one milligram of CoA contains 413 Lippman
units.
[PJC] |
C23H22O6
(gcide) | rotenone \ro"te*none\, n.
A chemical substance (C23H22O6) extracted from the root of
the derris (Derris elliptica, Derris malaccensis, and
other species), used in treatment of scabies and as an
insecticide for external infestation by chiggers in human
medicine, and in veterinary medicine for the treatment of
infestations with fleas, ticks, and lice.
[PJC] |
C26H29NO
(gcide) | Tamoxifen \Ta*mox"i*fen\ (t[a^]*m[o^]k"s[i^]*f[e^]n), n.
a chemical compound (C26H29NO) which is non-steroidal but
physiogically active as an estrogen antagonist. It is used to
treat postmenopausal breast cancer. Chemically it is
1-p-dimethylaminoethoxyphenyl-trans-1,2-diphenyl-but-1-ene.
It can be obtained as a white crystalline powder. --[MI11]
Syn: Kessar; Noltam; Nolvadex; Tamofen; Tamoxasta; Terimon;
Xynoplex. [PJC] |
C26H36N2O9
(gcide) | antimycin \an`ti*my"cin\ ([a^]n`t[i^]*m[imac]"s[i^]n), n.
1. one of several antibiotic substances produced by several
species of Streptomyces, active against various fungi.
They are used only experimentally, not in medicine. The
two best-known antimycins are antimycin A1 (C28H40N2O9)
and antimycin A3 (C26H36N2O9). They are notable for
their mechanism of action, interference with the proton
pumping mechanism of fungi.
[WordNet 1.5 +PJC] |
C26H54
(gcide) | Hexeikosane \Hex*ei"ko*sane\, n. [Hex- + eikosane.] (chem.)
A hydrocarbon, C26H54, resembling paraffine; -- so called
because each molecule has twenty-six atoms of carbon.
[Written also hexacosane.]
[1913 Webster] |
C2H6
(gcide) | Homology \Ho*mol"o*gy\, n. [Gr. ? agreement. See Homologous.]
1. The quality of being homologous; correspondence; relation;
as, the homologyof similar polygons.
[1913 Webster]
2. (Biol.) Correspondence or relation in type of structure in
contradistinction to similarity of function; as, the
relation in structure between the leg and arm of a man; or
that between the arm of a man, the fore leg of a horse,
the wing of a bird, and the fin of a fish, all these
organs being modifications of one type of structure.
[1913 Webster]
Note: Homology indicates genetic relationship, and according
to Haeckel special homology should be defined in terms
of identity of embryonic origin. See Homotypy, and
Homogeny.
[1913 Webster]
3. (Chem.) The correspondence or resemblance of substances
belonging to the same type or series; a similarity of
composition varying by a small, regular difference, and
usually attended by a regular variation in physical
properties; as, there is an homology between methane,
CH4, ethane, C2H6, propane, C3H8, etc., all members
of the paraffin series. In an extended sense, the term is
applied to the relation between chemical elements of the
same group; as, chlorine, bromine, and iodine are said to
be in homology with each other. Cf. Heterology.
[1913 Webster]
General homology (Biol.), the higher relation which a
series of parts, or a single part, bears to the
fundamental or general type on which the group is
constituted. --Owen.
Serial homology (Biol.), representative or repetitive
relation in the segments of the same organism, -- as in
the lobster, where the parts follow each other in a
straight line or series. --Owen. See Homotypy.
Special homology (Biol.), the correspondence of a part or
organ with those of a different animal, as determined by
relative position and connection. --Owen.
[1913 Webster]ethane \eth"ane\ ([e^]th"[=a]n), n. [From Ether.] (Chem.)
A gaseous hydrocarbon, C2H6, forming a constituent of
ordinary illuminating gas. It is the second member of the
paraffin series, and its most important derivatives are
common alcohol (ethyl alcohol), acetaldehyde, ether, and
acetic acid. Called also dimethyl.
[1913 Webster] |
C2H6O
(gcide) | molecular formula \mo*lec"u*lar form"u*la\, n. (Chem.)
An expression representing the composition of elements in a
chemical substance, commonly consisting of a series of
letters and numbers comprising the atomic symbols of each
element present in a compound followed by the number of atoms
of that element present in one molecule of the substance.
Thus the molecular formula for common alcohol (ethyl alcohol)
is C2H6O, meaning that each molecule contains two carbon
atoms, six hydrogen atoms, and one oxygen atom. The molecular
formula may be written to provide some indication of the
actual structure of the molecule, in which case structural
units may be written separately. Thus, ethyl alcohol can also
be written as CH3.CH2.OH or CH3-CH2-OH, in which the
period or dash between functional groups indicates a single
bond between the principle atoms of each group. This formula
shows that in ethyl alcohol, the carbon of a methyl group
(CH3-) is attached to the carbon of a methylene group
(-CH2-), which is attached to the oxygen of a hydroxyl
group (-OH). A structural formula is a graphical
depiction of the relative positions of atoms in a molecule,
and may be very complicated.
[PJC] |
C30H60
(gcide) | Melene \Mel"ene\, n. [Melissic + ethylene.] (Chem.)
An unsaturated hydrocarbon, C30H60, of the ethylene series,
obtained from beeswax as a white, scaly, crystalline wax; --
called also melissene, and melissylene.
[1913 Webster] |
C31H46O2
(gcide) | vitamin K1 \vitamin K1\ n.
one of the two K vitamins, (C31H46O2). It is fat-soluble
and occurs naturally as the trans isomer. Chemically it is
2-methyl-3-phytyl-1,4,-naphthoquinone.
Syn: phylloquinone, phytonadione, antihemorrhagic vitamin..
[WordNet 1.5 +PJC] vitamin K2 |
C32H16
(gcide) | Retinol \Ret"i*nol\, n. [Gr. ??? resin + L. oleum oil.]
1. (Chem.) A hydrocarbon oil C32H16, obtained by the
distillation of resin, -- used as a solvent, as an
antiseptic, and in printer's ink.
[1913 Webster +PJC]
2. One of the compounds which function as vitamin A. Called
also vitamin A, vitamin A1 and vitamin A alcohol.
See vitamin A1.
[PJC] |
C35H44O16
(gcide) | azadirachtin \azadirachtin\ n.
1. a triterpenoid (C35H44O16) isolated from the seeds of
the neem tree (Azadirachta indica), used as an
insecticide.
[WordNet 1.5 +PJC] |
C36H56O14
(gcide) | digitalin \dig"i*ta`lin\, n. [Cf. F. digitaline.]
(a) (Medicine, Pharmacy) Any one of several extracts of
foxglove (Digitalis), as the "French extract," the
"German extract," etc., which differ among themselves
in composition and properties. Both Digitalis lanata
and Digitalis purpurea have been used to prepare
such extracts.
(b) (Chem.) the distinctive chemical substance, a steroid
glycoside, which is the essential ingredient of the
extracts of foxglove. It is a white, crystalline
substance (C36H56O14), and is a 3-substituted
diglucoside of a steroid. It is a powerful cardiac
stimulant and is used as a cardiotonic for treatment
of certain heart conditions, such as congestive heart
failure. Chemically it is
(3[beta],5[beta],16[beta])-3-[6-Deoxy-4-O-[beta]-D-glucopyranosyl-3-O-methyl-[beta]-D-galactopyranosyl)oxy]-14,16-dihyroxy-card-20
(22)-enolide. The related compounds digitoxin and
digoxin are also extracted from the foxglove. The
class of steroid glycosides having cardiotonic
properties are refered to as the cardiac glycosides.
--MI11
Syn: digitalinum verum, Diginorgin, Schmiedeberg's digitalin,
digitalis, digitalis glycoside. [1913 Webster +PJC] |
C3H6
(gcide) | Propylene \Pro"pyl*ene\, n. [Cf. F. propyl[`e]ne.] (Chem.)
A colorless gaseous hydrocarbon (C3H6) of the ethylene
series, having a garlic odor. It occurs in coal gas, and is
produced artificially in various ways. Called also propene.
[1913 Webster]Trimethylene \Tri*meth"yl*ene\, n. (Chem.)
A gaseous hydrocarbon, C3H6, isomeric with propylene and
obtained from it indirectly. It is the base of a series of
compounds analogous to the aromatic hydrocarbons.cyclopropane \cyclopropane\ n.
a colorless flammable gas (C3H6) with a three-carbon ring,
sometimes used as an anesthetic.
[WordNet 1.5] |
C3H6N6
(gcide) | melamine \mel"a*mine\ (m[e^]l"[.a]*m[=e]n) n. (Chem.)
A nitrogenous strongly basic chemical substance (C3H6N6),
structurally 2,4,6-triamino-1,3,5-triazine, produced from
several cyanogen compounds, and obtained as a white
crystalline substance; -- formerly supposed to be produced by
the decomposition of melam. Called also cyanuramide. It is
used as one of the starting components (together with
formaldehyde) in the preparation of melamine resins,
including the commercially marketed Formica (TM). It is
solid at room temperature, and sublimes at temperatures
approaching 250[deg] C, decomposing at 345[deg] C. Density
1.573. --HCP61
[1913 Webster + PJC] melamine resin |
C3H6O3
(gcide) | Lactic \Lac"tic\, a. [L. lac, lactis, milk: cf. F. lactique. See
Lacteal, and cf. Galactic.] (Physiol. Chem.)
Of or pertaining to milk; procured from sour milk or whey;
as, lactic acid; lactic fermentation, etc.
[1913 Webster]
Lactic acid (Physiol. Chem.), a sirupy, colorless fluid,
soluble in water, with an intensely sour taste and strong
acid reaction. There is one center of optical activity,
and this results in the observation of three isomeric
modifications all having the formula C3H6O3; one is
dextrorotatory (L-lactic acid), the other levorotatory
(D-lactic acid), and the third an optically inactive
mixture of the first two (DL-lactic acid); chemically it
is 2-hydroxypropanoic acid. Sarcolactic acid or
paralactic acid occurs chiefly in dead muscle tissue,
while ordinary lactic acid (DL-lactic acid) results from
fermentation, such as the fermentation of milk by lactic
acid bacteria. The two acids are alike in having the same
constitution (expressed by the name {ethylidene lactic
acid}), but the latter is optically inactive, while
sarcolactic acid rotates the plane of polarization to the
right. The third acid, ethylene lactic acid, accompanies
sarcolactic acid in the juice of flesh, and is optically
inactive.
Lactic ferment, an organized ferment (Bacterium lacticum
or Bacterium lactis), which produces lactic
fermentation, decomposing the sugar of milk into carbonic
and lactic acids, the latter, of which renders the milk
sour, and precipitates the casein, thus giving rise to the
so-called spontaneous coagulation of milk.
Lactic fermentation. See under Fermentation.
[1913 Webster +PJC] |
C3H6OHCO2H
(gcide) | Oxybutyric \Ox`y*bu*tyr"ic\, a. [Oxy
(b) + butyric.] (Chem.) Hydroxybutyric; designating any one
of a group of metameric acids ((C3H6.OH).CO2H).
[1913 Webster] |
C3H7C6H4CHO
(gcide) | Cuminol \Cu"mi*nol\ (-n?l), n. [Cuminic + L. oleum.]
A liquid, C3H7.C6H4.CHO, obtained from oil of caraway; --
called also cuminic aldehyde.
[1913 Webster] |
C3H7C6H4CO2H
(gcide) | Cuminic \Cu*min"ic\ (k?-m?n"?k), a.
Pertaining to, or derived from, cumin, or from oil of
caraway; as, cuminic acid.
[1913 Webster]
Cuminic acid (Chem.), white crystalline substance,
C3H7.C6H4.CO2H, obtained from oil of caraway.
[1913 Webster] |
C3H7C6H4NH2
(gcide) | Cumidine \Cu"mi*dine\ (k?"m?-d?n or -d?n), n. [From Cumin.]
(Chem.)
A strong, liquid, organic base, C3H7.C6H4.NH2, homologous
with aniline.
[1913 Webster] |
C41H64O13
(gcide) | digitoxin \dig`i*tox"in\ (d[i^]j`[i^]*t[o^]k"s[i^]n), n. (Chem.)
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
(3[beta],5[beta])-3-[(O-2,6-Dideoxy-[beta]-D-ribo-hexopyranosyl-(1[rarr]4)-O-2,6-dideoxy-[beta]-D-ribo-hexopyranosyl-(1[rarr]4)-2,
6-dideoxy-[beta]-D-ribo-hexopyranosyl)oxy]-14-hydroxy-card-20(22)-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. --MI11
[PJC] |
C41H64O14
(gcide) | digoxin \di*gox"in\, n. (Chem.)
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
(3[beta],5[beta],12[beta])-3-[(O-2,6-Dideoxy-[beta]-D-ribo-hexopyranosyl-(1->4)-O-2,6-dideoxy-[beta]-D-ribo-hexopyranosyl-(1->4)-2
, 6-dideoxy-[beta]-D-ribo-hexopyranosyl)oxy]-12,14-dihydroxy-card-20(22)-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. --MI11
[PJC] |
C4H6
(gcide) | Crotonylene \Cro*ton"y*lene\ (kr?-t?n"?-l?n), n. [Crotonic +
acet-ylene.] (Chem.)
A colorless, volatile, pungent liquid, C4H6, produced
artificially, and regarded as an unsaturated hydrocarbon of
the acetylene series, and analogous to crotonic acid.
[1913 Webster]butadiene \butadiene\ n.
a gaseous hydrocarbon C4H6; -- it is used as a monomer unit
in making synthetic rubbers.
[WordNet 1.5] |
C4H6OH4
(gcide) | Tetracid \Tet*rac"id\, a. [Tetra + acid.] (Chem.)
Capable of neutralizing four molecules of a monobasic acid;
having four hydrogen atoms capable of replacement ba acids or
acid atoms; -- said of certain bases; thus, erythrine,
C4H6(OH)4, is a tetracid alcohol.
[1913 Webster]Erythrite \E*ryth"rite\, n. [Gr. 'eryqro`s red.]
1. (Chem.) A colorless crystalline substance, C4H6.(OH)4,
of a sweet, cooling taste, extracted from certain lichens,
and obtained by the decomposition of erythrin; -- called
also erythrol, erythroglucin, erythromannite,
pseudorcin, cobalt bloom, and under the name phycite
obtained from the alga Protococcus vulgaris. It is a
tetrabasic alcohol, corresponding to glycol and glycerin. |
C5H6
(gcide) | Valylene \Val"yl*ene\, n. [Valerian + -yl.] (Chem.)
A volatile liquid hydrocarbon, C5H6, related to ethylene
and acetylene, but possessing the property of unsaturation in
the third degree. It is the only known member of a distinct
series of compounds. It has a garlic odor.
[1913 Webster] |
C5H6O3
(gcide) | Tetrinic \Te*trin"ic\, a. [See Tetra-.] (Chem.)
Of, pertaining to, or designating, a complex ketonic acid,
C5H6O3, obtained as a white crystalline substance; -- so
called because once supposed to contain a peculiar radical of
four carbon atoms. Called also acetyl-acrylic acid.
[1913 Webster] |
C5H6O4
(gcide) | Itaconic \It`a*con"ic\, a. [From aconitic, by transposition of
the letters.] (Chem.)
Pertaining to, or designating, an acid, C5H6O4, which is
obtained as a white crystalline substance by decomposing
aconitic and other organic acids.
[1913 Webster] |
C5H8N4O6
(gcide) | Uroxanic \U`rox*an"ic\, a. [Uric + alloxan.] (Chem.)
Pertaining to, or designating, an acid, C5H8N4O6, which is
obtained, as a white crystalline substance, by the slow
oxidation of uric acid in alkaline solution.
[1913 Webster] |
C60H103N17O16S
(gcide) | bacitracin \bacitracin\ n. (1940) [Bacillus + Margaret Tracy, (a
child whose tissues contained Bacillus subtilis) + -in.
--RHUD.]
a polypeptide antibacterial antibiotic of known chemical
structure effective against several types of Gram-positive
organisms, and usually used topically for superficial local
infection.
Note: It is produced by Bacillus subtilis and {Bacillus
licheniformis}, and as produced commercially is
composed of several closely related substances. The
predominant component, Bacitracin A, has a formula
C60H103N17O16S, and contains D-ornithine,
D-phenylalanine and D-glutamine residues as well as the
L-isomers of leucine, isoleucine, histidine, asparagine
and aspartic acid. --[MI11]
[WordNet 1.5] |
C62H86N12O16
(gcide) | actinomycin D \actinomycin D\ n. [From actinomyces, the genus of
the organism in which they were first found.]
The most well-known of the actinomycins (C62H86N12O16), a
class of antibiotics which act by binding to DNA and
inhibiting synthesis of RNA; they act agains gram-positive
bacteria and many eukaryotic organisma. Actinomycin D has
been used in human medicine to treat certain tumors.
Syn: dactinomycin, actinomycin IV, Cosmegen[trade name],
actinomycin C1, actinomycin I1
[PJC] |
C6Cl4O2
(gcide) | Chloranil \Chlor`an"il\, n. [Chlorine + aniline.] (Chem.)
A yellow crystalline substance, C6Cl4.O2, regarded as a
derivative of quinone, obtained by the action of chlorine on
certain benzene derivatives, as aniline.
[1913 Webster] |
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