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The Microscopy of the More Commonly Occurring Starches (Classic Reprint)
No preview available - 2015
116 diameters angular and faceted appears average diameter barley starch Bermuda arrowroot starch biconvex lens black cross camera lucida centre centric rings characteristic closed curves compound grains concentric rings dark ground illumination Dark spot ellipsoidal exceedingly faint field flattened GLASGOW glomeruli grain of barley grains in Fig grains of pea grains of potato grains of sago grains of wheat grains show haricot bean starch individual grains irregular larger grains latter less line or slit long axis long dia magnification of 116 MAIZE STARCH markings micrometer scale microphotography microscope millimetre minute grains narrow end oat starch obtain pea starch personal equation photograph polarized light potato starch potato-starch grain reniform resembles rounded in outline rye starch sago starch shape the grains short diameter show no hilum shows a print similar small grains spheroidal grains starch grains stellate surface taken with transmitted tapioca starch tion translucent transmitted light transverse uniformly convex wheat starch
Page 1 - Tacitus, who speaks (Ger. 9) of their worship of Mercury, Mars, and Hercules. This is almost the only contradiction between these writers, in whose accounts of political and other institutions there is a striking agreement. This is all the more remarkable when we bear in mind that Ci sur went but little beyond the German frontier and had relatively little to do with them.
Page 19 - ... and rightly so, namely, that the markings occurring on some starches are never so plain as they are shown in the figures in the text-books of botany, hygiene, etc. But on the other hand, we think he rather overstates the difficulty of seeing these lines. He says of potato starch, for instance, that "these lines are in all cases faint ; indeed, to see them at all it is often necessary to reduce the aperture of the diaphragm of the microscope very considerably, or to use oblique light. . . . The...
Page 1 - ... Illustrated by twenty-two original Micro-photographs. London: Bailliere, Tindall, and Cox. 1900. Pp. 108. THE results of an investigation carried out by the author as a research student in the Public Health Laboratory at the University of Glasgow are embodied in this work. It is pointed out by the author that in spite of the importance from many points of view of an accurate delineation of the starches, very little has been done in this direction, in this country, up to the present time ; moreover,...
Page 102 - M 102 1 1 , more indistinct Occasionally a few exceedingly faint concentric: rings Very rarely, faint indication of concentric rings Faint concentric rings in a few cases extending about twc *s Concentric rings extending for less than one-third of length of grain Very faint appearance of concentric T3 O) jg 'o s 1 J3 6' 1 «3 3 1
Page 26 - When the analyzer is rotated through an angle of 90°, so that the field is light, the grains show no special markings, appearing in all respects as when viewed by transmitted light.