Scientific and applied pharmacognosy intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for food and drug analysts and pharmacologists . , radial-longitudinal section of stone cell , transverse section of outer layers of , radial-longitudinal section of outer layers of , Kt, Kr, transverse tangential-longitudinal and radial longitudinalsections of , bast , crystal , , , stone , medullary ray cells,c, collenchyma. 418 SCIENTIFIC AND APPLIED PHARMACOGNOSY oidical starch gr
Scientific and applied pharmacognosy intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for food and drug analysts and pharmacologists . , radial-longitudinal section of stone cell , transverse section of outer layers of , radial-longitudinal section of outer layers of , Kt, Kr, transverse tangential-longitudinal and radial longitudinalsections of , bast , crystal , , , stone , medullary ray cells,c, collenchyma. 418 SCIENTIFIC AND APPLIED PHARMACOGNOSY oidical starch grains about to mm. in diameter, or withcalcium oxalate either in rosette aggregates or prisms from mm. in diameter. Powder.—(Fig. 178.) Light brown to olive-brown; consistinglargely of groups of bast fibers with their associated crystal fibers,the latter being usually distinguished with difficulty, unless thematerial has been mounted in a solution of hydrated chloral andthoroughly cleared by boiling; almost equally numerous are thegroups of stone cells which are frequently associated with paren-chyma containing large rhombohedra of calcium oxalate; frag-. Fig. 178.—Rhamnus Purshianus: B, BF, bast fibers; CF, crystal fibers; Ca,calcium oxalate crystals; S, starch grains; P, parenchyma; MR, medullaryrays; St, stone cells; C, thick-walled, parenchyma of outer cortex; K, cork. ments of parenchyma and medullary ray cells colored red upon theaddition of solutions of the alkalies; starch grains either free orin parenchyma cells, the individual grains being somewhat spheroidal,from to mm. in diameter; calcium oxalate in monoclinicprisms or rosette aggregates from to mm. in diameter;occasional fragments of yellowish- or reddish-brown cork. Constituents.—The nature of the active constituents of thisdrug is not known. It may contain the glucoside cascarin (pur-shianin), which on hydrolysis yields emodin and one or more active CASCARA
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1920
