Thenard stated that yeast was the cause of fermentation, and held it to be of an animal nature, since it contained nitrogen and yielded ammonia on distillation, nor was it conclusively proved that the yeast cell was the originator of fermentation until the researches of C. Cagniard de la Tour, T.
Pasteur's important researches mark an epoch in the technical aspect of fermentation.
About this time Hansen, who had long been engaged in researches on the biology of the fungi of fermentation, demonstrated that yeast free from bacteria could nevertheless occasion diseases in beer.
In delicate researches two divisions of the scale should always be read, not merely for increased accuracy but to obtain the corrections for " run " from the observations themselves.
Attempts have been made, principally founded on some remarks of Huygens, to show that Descartes had learned the principles of refraction from the manuscript of a treatise by Willebrord Snell, but the facts are uncertain; and, so far as Descartes founds his optics on any one, it is probably on the researches of Kepler.
Borelli (1608-1679) as its most notable name, entered in a way on the mechanical study of anatomy suggested by Descartes, but was probably much more dependent upon the positive researches of Galileo.
In 1859 he began, in concert with Sir William Thomson (afterwards Lord Kelvin), to work on problems respecting the making and use of cables, and the importance of his researches on the resistance of gutta-percha was at once recognized.
Ainsworth, Researches in Assyria (1838); R.
Smith, Early History of India (1904), and the references there given to the researches of Sir T.
Tozer, Researches in the Highlands of Turkey (London, 1869); F.
According to the researches of R.
In some cases (as in rat-kangaroos) this tooth retains its place and function until the animal has nearly, if not quite, 1 The presence or absence of the corpus callosum has been much disputed; the latest researches, however, indicate its absence.
As early as 1866, tannic acid, gallic acid, wood spirit, acetic acid, essential oil and eucalyptol were produced from various species of eucalyptus, and researches made by Australian chemists, notably by Messrs.
Researches go to show that Baiame has his counterpart in other tribes, the myth varying greatly in detail.
These local researches, and the more comprehensive attempts of Leichhardt and Mitchell to solve the chief problems of.
The main results of these researches, which occupied him from 1854 to 1864, are contained in his Report on the Theory of Numbers, which appeared in the British Association volumes from 1859 to 1865.
The fact that a question of which Smith had given the solution in 1867, as a corollary from general formulae governing the whole class of investigations to which it belonged, should have been set by the Academie as the subject of their great prize shows how far in advance of his contemporaries his early researches had carried him.
During the last few years of his life Boole was constantly engaged in extending his researches with the object of producing a second edition of his Differential Equations much more complete than the first edition; and part of his last vacation was spent in the libraries of the Royal Society and the British Museum.
During the three years he held this position he carried out researches on the contact of elastic solids, hardness, evaporation and the electric discharge in gases, the last earning him the special commendation of Helmholtz.
There he continued his researches on the discharge of electricity in rarefied gases, only just missing the discovery of the X-rays described by W.
It is true that the killing of the god plays a prominent part in primitive cults, as has been shown more particularly through the valuable researches of J.
The researches of Liebig (1823), Liebig and Gay-Lussac (1824), and of Liebig again in 1838 showed the acid to be isomeric with cyanic acid, and probably (Hcno) 2, since it gave mixed and acid salts.
It has been sometimes misspelt "Tapacolo," as by C. Darwin, who gave (Journal of Researches, chap. xii.) a brief but entertaining account of the habits of this bird and its relative, Hylactes megapodius, called by the Chilenos "El Turco."
The results of these researches are published in the Sitz.
Even the prologues, which later researches have shown to be in the main by the hand of Plautus himself, though certain passages were clearly added at a later date, e.g.
She researches credit card processors and decides to go with PayPal for now.