| 释义 |
trehala|trɪˈhɑːlə|
Also tricala.
[ad. Turkish tīqālah, native name.]
The substance of the cocoons of a coleopterous insect, Larinus maculatus, found in Asia Minor; also called trehala-manna, Turkish or Syrian manna.
1862Watts Gmelin's Handbk. Chem. XV. 300 When pulverised trehala manna is treated with boiling alcohol, trehalose sometimes crystallises from the extract on cooling. 1868― Dict. Chem. V. 878 Trehala or tricala, a substance imported from Persia, and consisting of the hollow cocoons of a coleopterous insect (Larinus maculatus). The larva of this insect eats the branches of Echinops persica, for the sake of the sugar, starch, and gum contained in them, and afterwards voids these substances to form its cocoon... Trehala has a sweetish taste, swells up in water, and is converted into a thick mucilaginous paste.
Hence trehalose |ˈtriːhələʊs, triːˈhɑːləʊs|, Chem., a white crystalline sugar, C12H22O11.2H2O, obtained by Berthelot in 1857 from trehala.
1862Miller Elem. Chem. (ed. 2) III. 73 The most important of these [varieties] is the common sugar, furnished by the sugar cane,..related to which are some others of small importance, viz. trehalose, melezitose, and melitose. 1865–8Watts Dict. Chem. III. 1068 Mycose or trehalose. C12H22O11... Berthelot..obtained from trehala-manna..a sugar which he called trehalose, and at first regarded as different from mycose; but on further examination he was led to infer that the two are identical. |