. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . Fig. 231. Cocoanut. Cross section of a large flattened (mesocarp) fiber, sle stegmata;/ sheath of bast fibers; pli two phloem groups; x xylem; p parenchyma of groundtissue; a rudimentary bundle belonging to small branch. X90. (Winton.) 2. Mesocarp. The outer portion consists of a ground tissue of thick-walled, porous cells, through which pass longitudinally arranged strands 284 NUTS. of bast elements. Further inward the ground tissue is thin-walledparenchyma and the stra
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . Fig. 231. Cocoanut. Cross section of a large flattened (mesocarp) fiber, sle stegmata;/ sheath of bast fibers; pli two phloem groups; x xylem; p parenchyma of groundtissue; a rudimentary bundle belonging to small branch. X90. (Winton.) 2. Mesocarp. The outer portion consists of a ground tissue of thick-walled, porous cells, through which pass longitudinally arranged strands 284 NUTS. of bast elements. Further inward the ground tissue is thin-walledparenchyma and the strands arc well developed libro-vascular the brown liquid previously referred to has penetrated the. Fig. 232. Cocoanut. Longitudinal section of a large (mesocarp) fiber, ste stegmata;Si silicious body; / bast fibers; / tracheids with small pits; / tracheids with large pits;5^ spiral vessel; r reticulated vessel; ic scalariform vessel; j sieve tube; c and ccambi-form cells. X300. (Winto.\.) inner layers of the mesocarp, groups of the parenchyma cells here andthere, being impregnated. with this material, are of a brown color andappear thicker-walled than the others (Fig. 234, hr). This brown sub-stance is quickly changed to a reddish color by alkali, but is notaffected by alcohol, ether, or the specific reagents for proteids, fats and resins. No immediate effect is produced byferric chloride solution, but on long standingthe color is changed to olive-green. Coir fibers (Figs. 231 and 232) are builtuj) of a thick sheath of bast filxTS with rows ofstegmata on the surface, and within the sheathtwo groups of phloem and one of .\ seen in surface view the stegmata (^/e) are circular
Size: 1998px × 1250px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectplantanatomy
