| slovo | definícia |
isomer
(encz) | isomer,izomer [chem.] |
Isomer
(gcide) | Isomer \I"so*mer\ ([imac]"s[-o]*m[~e]r), n. [See Isomeric.]
(Chem.)
A compound which is isomeric with another body or compound; a
compound having the same chemical composition as another
compound; a member of an isomeric series.
[1913 Webster +PJC]
Note: An isomer may be a structural isomer, in which some
of the atoms are bonded to different atoms (as in
CH3.CH2.NH2 and CH3.NH.CH3), or an {optical
isomer}, in which the number and types of chemical
bonds are identical, but the arrangement of the atoms
in three-dimensional space is different; the latter are
also called stereoisomers.
[PJC] |
isomer
(wn) | isomer
n 1: a compound that exists in forms having different
arrangements of atoms but the same molecular weight |
| | podobné slovo | definícia |
isomer
(encz) | isomer,izomer [chem.] |
isomerase
(encz) | isomerase, n: |
isomeric
(encz) | isomeric,izomerní adj: Zdeněk Brož |
isomerisation
(encz) | isomerisation, n: |
isomerise
(encz) | isomerise, v: |
isomerism
(encz) | isomerism,izomerie n: Zdeněk Brož |
isomerization
(encz) | isomerization, n: |
isomerize
(encz) | isomerize,izomerizovat v: Zdeněk Brož |
Anisomeric
(gcide) | Anisomeric \An`i*so*mer"ic\, a. [Gr. ? unequal + ? part.]
(Chem.)
Not isomeric; not made of the same components in the same
proportions.
[1913 Webster] |
Anisomerous
(gcide) | Anisomerous \An`i*som"er*ous\, a. [See Anisomeric.] (Bot.)
Having the number of floral organs unequal, as four petals
and six stamens.
[1913 Webster] |
Isomere
(gcide) | Isomere \I"so*mere\, n. [Iso- + -mere.] (Zool.)
1. A homologous or corresponding part or segment.
[Webster 1913 Suppl.]
2. (Chem.) same as Isomer. [archaic]
[Webster 1913 Suppl. +PJC] |
isomeric
(gcide) | isomeric \i`so*mer"ic\ ([imac]`s[-o]*m[e^]r"[i^]k), a. [Iso- +
Gr. me`ros part: cf. F. isom['e]rique.] (Chem.)
Having the same chemical composition and molecular weight;
having the same number of atoms of each kind in the molecule;
-- said of chemical compounds with known chemical
composition. This property used to be called metameric to
distinguish it from other forms of isomerism.
[PJC]
Note: Formerly the term isomeric applied also to comopounds
having the same percentage chemical composition, even
if the number of atoms in a molecule differed. In the
1913 dictionary isomeric was defined as:
"Having the same percentage composition; -- said of two
or more different substances which contain the same
ingredients in the same proportions by weight, often
used with with. Specif.:
(a) Polymeric; i. e., having the same elements united in the
same proportion by weight, but with different molecular
weights; as, acetylene and benzine are isomeric
(polymeric) with each other in this sense. See
Polymeric.
(b) Metameric; i. e., having the same elements united in the
same proportions by weight, and with the same molecular
weight, but with a different structure or arrangement of
the ultimate parts; as, ethyl alcohol and methyl ether
are isomeric (metameric) with each other in this sense.
See Metameric."
[1913 Webster] |
Isomeride
(gcide) | Isomeride \I*som"er*ide\, n. (Chem.)
An isomer. [R.]
[1913 Webster] |
Isomerism
(gcide) | Isomerism \I*som"er*ism\, n. (Chem.)
The state, quality, or relation, of two or more isomeric
substances.
[1913 Webster]
Physical isomerism (Chem.), a former term for {optical
isomerism}.
optical isomerism (Chem.), the condition or relation of
certain (isomeric) substances, which, while chemically
identical (in that they have the same composition, the
same molecular weights, and the same ultimate
constitution), are yet physically different, as in their
action on polarized light, as dextro- and l[ae]vo-tartaric
acids, or the sugars galactose and glucose. In such
compounds there is usually at least one unsymmetrical
carbon atom and typically more than one. See
Unsymmetrical.
[1913 Webster +PJC] |
Isomeromorphism
(gcide) | Isomeromorphism \I`so*mer`o*mor"phism\, n. [Isomer + Gr. morfh`
form + -ism.] (Crystallog.)
Isomorphism between substances that are isomeric. Isometric |
optical isomer
(gcide) | Isomer \I"so*mer\ ([imac]"s[-o]*m[~e]r), n. [See Isomeric.]
(Chem.)
A compound which is isomeric with another body or compound; a
compound having the same chemical composition as another
compound; a member of an isomeric series.
[1913 Webster +PJC]
Note: An isomer may be a structural isomer, in which some
of the atoms are bonded to different atoms (as in
CH3.CH2.NH2 and CH3.NH.CH3), or an {optical
isomer}, in which the number and types of chemical
bonds are identical, but the arrangement of the atoms
in three-dimensional space is different; the latter are
also called stereoisomers.
[PJC] |
optical isomerism
(gcide) | Isomerism \I*som"er*ism\, n. (Chem.)
The state, quality, or relation, of two or more isomeric
substances.
[1913 Webster]
Physical isomerism (Chem.), a former term for {optical
isomerism}.
optical isomerism (Chem.), the condition or relation of
certain (isomeric) substances, which, while chemically
identical (in that they have the same composition, the
same molecular weights, and the same ultimate
constitution), are yet physically different, as in their
action on polarized light, as dextro- and l[ae]vo-tartaric
acids, or the sugars galactose and glucose. In such
compounds there is usually at least one unsymmetrical
carbon atom and typically more than one. See
Unsymmetrical.
[1913 Webster +PJC] |
Physical isomerism
(gcide) | Isomerism \I*som"er*ism\, n. (Chem.)
The state, quality, or relation, of two or more isomeric
substances.
[1913 Webster]
Physical isomerism (Chem.), a former term for {optical
isomerism}.
optical isomerism (Chem.), the condition or relation of
certain (isomeric) substances, which, while chemically
identical (in that they have the same composition, the
same molecular weights, and the same ultimate
constitution), are yet physically different, as in their
action on polarized light, as dextro- and l[ae]vo-tartaric
acids, or the sugars galactose and glucose. In such
compounds there is usually at least one unsymmetrical
carbon atom and typically more than one. See
Unsymmetrical.
[1913 Webster +PJC] |
stereoisomers
(gcide) | Isomer \I"so*mer\ ([imac]"s[-o]*m[~e]r), n. [See Isomeric.]
(Chem.)
A compound which is isomeric with another body or compound; a
compound having the same chemical composition as another
compound; a member of an isomeric series.
[1913 Webster +PJC]
Note: An isomer may be a structural isomer, in which some
of the atoms are bonded to different atoms (as in
CH3.CH2.NH2 and CH3.NH.CH3), or an {optical
isomer}, in which the number and types of chemical
bonds are identical, but the arrangement of the atoms
in three-dimensional space is different; the latter are
also called stereoisomers.
[PJC] |
structural isomer
(gcide) | Isomer \I"so*mer\ ([imac]"s[-o]*m[~e]r), n. [See Isomeric.]
(Chem.)
A compound which is isomeric with another body or compound; a
compound having the same chemical composition as another
compound; a member of an isomeric series.
[1913 Webster +PJC]
Note: An isomer may be a structural isomer, in which some
of the atoms are bonded to different atoms (as in
CH3.CH2.NH2 and CH3.NH.CH3), or an {optical
isomer}, in which the number and types of chemical
bonds are identical, but the arrangement of the atoms
in three-dimensional space is different; the latter are
also called stereoisomers.
[PJC] |
isomer
(wn) | isomer
n 1: a compound that exists in forms having different
arrangements of atoms but the same molecular weight |
isomerase
(wn) | isomerase
n 1: an enzyme that catalyzes its substrate to an isomeric form |
isomeric
(wn) | isomeric
adj 1: of or relating to or exhibiting isomerism |
isomerisation
(wn) | isomerisation
n 1: the conversion of a compound into an isomer of itself [syn:
isomerization, isomerisation] |
isomerise
(wn) | isomerise
v 1: cause to change into an isomer [syn: isomerize,
isomerise]
2: change into an isomer [syn: isomerize, isomerise] |
isomerism
(wn) | isomerism
n 1: the state of being an isomer; the complex of chemical and
physical phenomena characteristic of isomers |
isomerization
(wn) | isomerization
n 1: the conversion of a compound into an isomer of itself [syn:
isomerization, isomerisation] |
isomerize
(wn) | isomerize
v 1: cause to change into an isomer [syn: isomerize,
isomerise]
2: change into an isomer [syn: isomerize, isomerise] |
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