. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . esundh. 1899, lo, 229. Hanausek, T. F.: Eine neue Ingvversorte. Ztschr. allg. ostcrr. 1883, , A.: Ueberdie Rhiz. d. oflic. Zingiberaceen. Arch. Pharm. 1881, : Zur Untcrsuchung von Rhiz. Zingiberis und Rhiz. ZeJoarie. Schw. Chem. 1905. TURMERIC. Curcuma, or turmeric, is the rhizome of Curcuma longa L. (orderZingiberacccr), a plant closely related to ginger, grown in Incha, China,Cochin China, Java, and other tropical countries.
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . esundh. 1899, lo, 229. Hanausek, T. F.: Eine neue Ingvversorte. Ztschr. allg. ostcrr. 1883, , A.: Ueberdie Rhiz. d. oflic. Zingiberaceen. Arch. Pharm. 1881, : Zur Untcrsuchung von Rhiz. Zingiberis und Rhiz. ZeJoarie. Schw. Chem. 1905. TURMERIC. Curcuma, or turmeric, is the rhizome of Curcuma longa L. (orderZingiberacccr), a plant closely related to ginger, grown in Incha, China,Cochin China, Java, and other tropical countries. TURMERIC. 603 The main rhizome (round turmeric) is ovate or pear-shaped, up to4 cm. long and 3 cm. thick (Fig. 515). The upper part is encircled by-leaf-scars, the lower part is marked by scars of the secondary rhizomesand roots. It is sliced before drying. The secondary rhizomes (longturmeric) are cm. thick, elongated, indistinctly ringed, simpleor sparingly branched. The vitality of the rhizomes is destroyed by scalding previous to drying,thus converting the grains into lumps, to which the mixture of oil and. Fig. 515. Turmeric {Curcuma longa). Primary (round) and secondary (long) rhizomes.(Hager.) curcumin liberated from the oil cells imparts a deep-yellow color. ^\sfound on the market, the product is hard, tough, and sinks in fractured surface is smooth, waxy, of an orange-yellow color. Asappears in cross section, the rind is thicker than in ginger, constitutingalmost one-quarter of the thickness of the rliizome. It cannot be removedby scraping. HISTOLOGY. Turmeric (Fig. 516) closely resembles ginger in structure, but isdistinguished by the absence of bast fibers. The epidermis, which inparts is well preserved, resembles that of Curcuma Zedoaria, and likethe latter bears thick-walled unicellular hairs. The yellow lumps (h),consisting largely of starch-paste, are colored blue by iodine. On addi-tion of dilute alkah the yellow coloring substance (curcumin)
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