an introduction to the chemistry of plant products by Paul Haas

By Paul Haas

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an introduction to the chemistry of plant products

This can be an actual copy of a booklet released ahead of 1923. this isn't an OCR'd booklet with unusual characters, brought typographical mistakes, and jumbled phrases. This ebook can have occasional imperfections akin to lacking or blurred pages, negative photographs, errant marks, and so forth. that have been both a part of the unique artifact, or have been brought by means of the scanning approach.

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C. of water saturated with carbon dioxide resulted in four weeks in the production of hydrogen peroxide and formaldehyde. Most of the latter was in a polymerized state, but the solution contained no sugar. The effect of salts of radio-active metals such as potassium and rubidium has been the subject of many investigations but it is impossible as yet to draw any definite conclusions. * Fenton : " Journ. Chem. ," 1907, 91, 687. t Polacci: " Atti. Inst. , 11,7. { Gibson : " Ann. /' 1908, 22, 117. , 1925, 39, 515.

Being 2*1. * The culminating point of the assimilatory curve (Fig. 5) in respect to increasing temperature is important and is paralleled in enzyme action ; in view of the results obtained by Willstatter and Stoll, it is not unlikely that the inhibition or destruction of an enzyme at these higher temperatures may be the limiting factor. Osterhout and Haas | obtained a coefficient of 1*81 for Ulvarigida between 170 and 270 C, afigurewhich, according to Smith % is probably too low. Warburg § investigated the same phenomenon in Chlorella and thus avoided the difficulties inseparable from morphological complexity with a varying internal temperature and possibly an uneven rate of * Blackmail and Smith : " Proc.

I, p. 353. 3* 36 THE SYNTHESIS OF CARBOHYDRATES amount of radiant "energy absorbed. This, in brief, is Englemann's * theory of chromatic adaptation, a theory which has been extended to include many plants, Phaeophyceae, Bacilliariales, Bacteria, and terrestrial plants which possess these extra pigments. Gaidukov f in his experiments with Oscillaria found that the cultures changed their colour, violet in dim light, to the complementary colour to that in which they were growing ; thus if grown in red light, the new cells would be green, and so on.

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