saccharose
n . 蔗糖
蔗糖
saccharose n 1 :
a complex carbohydrate found in many plants and used as a sweetening agent [
synonym : {
sucrose }, {
saccharose }]
Saccharose \
Sac "
cha *
rose `\,
n . (
Chem .)
Cane sugar ;
sucrose ;
also ,
in general ,
any one of the group of which saccharose ,
or sucrose proper ,
is the type .
See {
Sucrose }.
[
1913 Webster ]
Sucrose \
Su "
crose `\,
n . [
F .
sucre sugar .
See {
Sugar }.] (
Chem .)
A common variety of sugar found in the juices of many plants ,
as the sugar cane ,
sorghum ,
sugar maple ,
beet root ,
etc .
It is extracted as a sweet ,
white crystalline substance which is valuable as a food product ,
and ,
being antiputrescent ,
is largely used in the preservation of fruit .
Called also {
saccharose }, {
cane sugar },
etc .
At one time the term was used by extension ,
for any one of the class of isomeric substances (
as lactose ,
maltose ,
etc .)
of which sucrose proper is the type ;
however this usage is now archaic .
[
1913 Webster PJC ]
Note :
Sucrose proper is a dextrorotatory carbohydrate ,
{
C12H22O11 }.
It does not reduce Fehling '
s solution ,
and though not directly fermentable ,
yet on standing with yeast it is changed by the diastase present to invert sugar (
dextrose and levulose ),
which then breaks down to alcohol and carbon dioxide .
It is also decomposed to invert sugar by heating with acids ,
whence it is also called a {
disaccharate }.
Sucrose possesses at once the properties of an alcohol and a ketone ,
and also forms compounds (
called sucrates )
analogous to salts .
Cf .
{
Sugar }.
[
1913 Webster ]
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