agar 音标拼音: ['egɚ]
n . 海菜;紫菜;石花菜;细菌培养基
海菜;紫菜;石花菜;细菌培养基
agar n 1 :
any culture medium that uses agar as the gelling agent [
synonym : {
agar }, {
nutrient agar }]
2 :
a colloidal extract of algae ;
used especially in culture media and as a gelling agent in foods [
synonym : {
agar }, {
agar -
agar }]
agar \
a "
gar \,
n . [
See {
agar -
agar }.]
1 .
common shortened form of {
agar -
agar [
2 ]}.
Syn :
gelose ,
agar -
agar .
[
PJC ]
2 .
1 any culture medium that uses agar as the gelling agent ;
--
used especially with a modifying prefix ,
as ,
EMB agar .
The term is applied both to the dehydrated medium powder containing agar and to the gelatinous medium prepared from it .
Syn :
nutrient agar [
WordNet 1 .
5 PJC ]
Agar -
agar \
A `
gar -
a "
gar \,
n . [
Ceylonese local name .]
1 .
A fucus or seaweed much used in the East for soups and jellies ;
Ceylon moss ({
Gracilaria lichenoides }).
[
1913 Webster ]
2 .
A gelatinlike substance ,
or a solution of it ,
prepared from certain seaweeds containing gelose (
such as Ceylon moss , {
Gracilaria lichenoides }
or other seaweeds of the genera {
Gelidium }, {
Ceramium }, {
Pterocladia },
and {
Eucheuma }),
and used for solidifying growth media in the artificial cultivation of bacteria ,
or as a gelling agent in foods ; --
usually called simply {
agar },
by abbreviation .
Note :
In composition it is predominantly a polysaccharide ,
and is not degraded by most bacteria .
It thus almost completely replaced the earlier protein -
based gelatins used for fixing bacterial colonies on culture plates ,
as the gelatins were often dissolved by the proteolytic enzymes common in bacteria .
Syn :
gelose ,
agar .
[
Webster 1913 Suppl .]
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