. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . ith 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 extract, and into dextrose by heatingwith acid. By the (hastase
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . ith 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 extract, and into dextrose by heatingwith acid. By the (hastase iiielhod mace yields 20-30 1)ct cent of so-called starch, or, strictly spi-aking, amylod/xtrin stanh. The oilcells contain a light yellow mixlun- of essential oil, resin, and fat. Addi TRUE NUTMEG AND MACE. 535 tion of alkali does not produce a marked coloration—never a blood-redcolor, as in the case of Bombay mace. Spermoderm (Fig. 453). During drjing the hard, chocolate-brownshell, consisting of the spermoderm with a portion of the outer or primaryperisperm, separates from the nutmeg. Cross sections may be cut dry. Fig. 453, Nutmeg. Shell in cross section. 5 spermoderm consists of ep epidermis withst starch grains, p parenchyma with .^ bundle, /><!/ outer palisade layer, and paT- innerpalisade layer with kr crystals; N perisperm with q^s fiber layer. (Hallstrom.) and cleared with chloral, potash, or, best of all, Javelle water. Tan-gential sections should also be cut of both the outer and inner lavers. I. Epidermis {ep). Tangential sections show clearly the sharplypolygonal epidermal cells 20-40 [i in diameter with double walls 3 nthick; also robustly developed stomata. Brownish, amorphous cell-contents, and often starch grains are the visible contents. 536 SPICES /iND CONDIMENTS. 2. Parenchyma (p). The cells are thin-walled and contain clear,port-wine colored masses readily separating from the cells, also occasionalcrjstals of oxalate of lime. Fibro-vascular bundles
Size: 1116px × 2238px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectplantanatomy
