Buchner sentence example
In 1897 Buchner submitted yeast to great pressure, and isolated a nitrogenous substance, enzymic in character, which he termed "zymase."
In estimating Buchner's philosophy it must be remembered that he was primarily a physiologist, not a metaphysician.
Buchner is not always clear in his theory of the relation between matter and force.
Buchner was much less concerned to establish a scientific metaphysic than to protest against the romantic idealism of his predecessors and the theological interpretations of the universe.
In the so-called "Buchner funnel," the filtering vessel is cylindrical, and the paper receives support by being laid upon its flat perforated bottom.Advertisement
Several causes, beginning towards the end of the 18th century, gradually led up to the materialism of Moleschott, Vogt and Buchner, which flourished in the middle of the 19th century.
Buchner (q.v.) himself said that he owed to Moleschott the first impulse to composing his important Buchner.
Buchner also entreats us " to abandon the word ` materialism,' to which (it is not clear why) a.
The point is that neither Buchner nor Haeckel could on their assumptions recognize any force but force of body, or any mind but mind of body, or any distinct thing or substance except body.
Among the enzymes already extracted from fungi are invertases (yeasts, moulds, &c.), which split cane-sugar and other complex sugars with hydrolysis into simpler sugars such as dextrose and levulose; diastases, which convert starches into sugars (Aspergillus, &c.); cytases, which dissolve cellulose similarly (Botrytis, &c.); peptases, using the term as a general one for all enzymes which convert proteids into peptones and other bodies (Penicillium, &c.); lipases, which break up fatty oils (Empusa, Phycomyces, &c.); oxydases, which bring about the oxidations and changes of colour observed in Boletus, and zymase, extracted by Buchner from yeast, which brings about the conversion of sugar into alcohol and carbondioxide.Advertisement
It has since been shown by Buchner and Albert that yeast-cells which have been killed by alcohol and ether, or with acetone, still retain the enzyme.
Such material is far more active than the zymase obtained originally by Buchner from the expressed juice of yeast-cells.
Concerning the second question, the recent investigations of Buchner ascogenous hyphae with their asci represent the sporophyte since they are derived from the fertilized ascogonium.
According to Buchner the fermentative activity of yeast-cell juice is not due to the presence of living yeast cells, or to the action of living yeast protoplasm, but it is caused by a soluble enzyme.
The remarkable discoveries of Fischer and Buchner to a great extent confirm Traube's views, and reconcile Liebig's and Pasteur's theories.Advertisement
Davy) to 77 (Buchner)% of tannin (see 8 " Resherches pour servir a l'histoire des galles," Ann.
It appears also that Darwin, having extended his theory of evolution as far as the rational and moral nature of man, in the Descent of Man, ended in his Autobiography by declaring his attitude to first and final causes to be that of an agnostic. Not that he was a materialist, and shortly before his death, in a conversation with Buchner, he maintained his agnosticism against his opponent's atheism.