. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . slica jragrans). Cross section of outer layers, ep epidermis; pparenchyma with o oil cells. Xi6o. (Moeller.) arms which form an irregular network clasping the seed. As found inthe market, mace is buff or brown, translucent, brittle, and agreeablyaromatic, owing to the essential oil present in amounts varying from6-15 per cent. Because of the large amount of fat (20-25 per cent),sections should be extracted with ether for the microscopic study of theother elements. I. Epi
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . slica jragrans). Cross section of outer layers, ep epidermis; pparenchyma with o oil cells. Xi6o. (Moeller.) arms which form an irregular network clasping the seed. As found inthe market, mace is buff or brown, translucent, brittle, and agreeablyaromatic, owing to the essential oil present in amounts varying from6-15 per cent. Because of the large amount of fat (20-25 per cent),sections should be extracted with ether for the microscopic study of theother elements. I. Epidermis {ep). The cells are longitudinally extended, some-times reaching a length of nearly i mm., and vary from 20-40 n in width. 534 SPICES /1ND CONDIMENTS. At the ends they are either sharply pointed or truncated. From cross-sections it appears that the cuticularizcd outer walls arc greatly thickened(6-8 /i), and that the other walls are moderately thick and swell con-siderably in water. Chlorzinc iodine stains the walls blue, the cuticleyellow. These cells arc almost always wider than thick, thus differing fCf^:W!-\. Fio. 452. Mace. Surface view of ep outer epidermis and p parenchyma. X160, (MOELLER.) from the corresponding cells of Bombay mace, which in cross-sectionare radially elongated. 2. A Hypoderm of coUenchyma cells is found in some i)arls, jxir-ticularly near the base. 3. Ground Tissue (p) of thin-wallcd, isodiamctric cells 25-50 /(, largeoil cells up to 80 /I, and fibro-vascular bundles, constitutes the bulk ofthe material. In sections i)rcviously extracted with ether, the eills ofthe ground tissue are seen to contain numerous curious, irreguhir, carbo-hychalc bodies with rounded excrescences, ranging in length up to 12 /«,which Ixcome rv(\ or red-brown on addition of iodine. These bodies,to which Tschirch has given the name amylodextrin starch, consist ofa substance intermediate between starch and dextrine, convertible, likestarch, into a soIuIjIc form by malt ex
Size: 1465px × 1706px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectplantanatomy
