He at first intended to adopt the medical profession, and made some progress in anatomy, botany and chemistry, after which he studied chronology, geometry and astronomy. Physical Chemistry We have seen how chemistry may be regarded as having for its province the investigation of the composition of matter, and the changes in composition which matter or energy may effect on matter, while physics is concerned with the general properties of matter. Whereas carbon renders isomerism possible in organic compounds, cobalt and platinum are the determining elements in inorganic chemistry, the phenomena being exhibited especially by complex ammoniacal derivatives. We may, however, notice Heinrich Rose i and Friedrich WShler, 2 who, having worked up the results of their teacher Berzelius, and combined them with their own valuable observations, exerted great influence on the progress of analytical chemistry by publishing works which contained admirable accounts of the then known methods of analysis. Of his earlier papers, some deal with questions of organic chemistry, others with Graham's hydrogenium and its physical constants, others with high temperatures, e.g. The first incentive to his serious study of chemistry was given by hearing J. But his best known contribution to general chemistry is his work on the phenomena of reversible reactions, which he comprehended under a general theory of " dissociation. Comte's series or hierarchy is arranged as follows: (i) Mathematics (that is, number, geometry, and mechanics), (2) Astronomy, (3) Physics, (4) Chemistry, (5) Biology, (6) Sociology. When, in 1845, a school of practical chemistry was started in London, under the style of the Royal College of Chemistry, Hofmann, largely through the influence of the Prince Consort, was appointed its first director. Because it generated heat, the chemical was considered exothermic. He made a resolute attempt to reconstruct medicine on the two bases of the doctrine of the circulation of the blood and the new views of chemistry. Thus the reciprocity of the various organs, maintained throughout the divisions of physiological labour, is not merely a mechanical stability; it is also a mutual equilibration in functions incessantly at work on chemical levels, and on those levels of still higher complexity which seem to rise as far beyond chemistry as chemistry beyond physics. The constitution of the benzene ring, the isomerism of its derivatives, and their syntheses from aliphatic or openchain compounds, are treated in the article Chemistry. In the article Thermo Chemistry a general account of heats of formation of chemical compounds is given, and it is there shown that this constant measures the stability of the compound. The quantitative precipitation of metals by the electric current, although known to Michael Faraday, was not applied to analytical chemistry until O. This spirit gave way to the physicians, who regarded " chemistry as the art of preparing medicines," a denotation which in turn succumbed to the arguments of Boyle, who regarded it as the " science of the composition of substances," a definition which adequately fits the science to-day. Inside of the atom, the electron serves as a negatively active neutron and balances the positive proton. On the death of Robert Whytt (1714-1766), the professor of the institutes of medicine, Cullen accepted the chair, at the same time resigning that of chemistry. Naval Academy in 1873 and was instructor in physics and chemistry there during 18 75-9. water free from salts and to some extent of the dissolved gases which are always present in natural waters, is of indispensable value in many operations both of scientific and industrial chemistry. You can get the definition(s) of a word in the list below by tapping the question-mark icon next to it. During his residence at Hamilton, besides the arduous duties of medical practice, he found time to devote to the study of the natural sciences, and especially of chemistry. 0 The earliest Hellenic culture in the East was Syrian, and the Arabs made their first acquaintance with Greek chemistry , as with Greek philosophy, mathematics, medicine, &c., by the intermediary of Syriac translations. Bergman worked in the same direction; while Rouelle was attracted to the study of animal chemistry. The Lowell textile school, opened in 1897, offers courses in cotton manufacturing, wool manufacturing, designing, chemistry and dyeing, and textile engineering; evening drawing schools and manual training in the public schools have contributed to the high degree of technical perfection in the factories. This chair he retained until his death, which happened on the 2nd of July 1852 at Kilmun, Argyleshire; but from 1841 he was assisted by his nephew and son-in-law ROBERT DINDAS. In 1885 he was chosen to succeed Hans Hubner (1837-1884) in the professorship of chemistry at GÃ¶ttingen, where stereochemical questions especially engaged his attention; and in 1889, on the resignation of his old master, Bunsen, he was appointed to the chair of chemistry in Heidelberg. Lavoisier, to whom chemistry was primarily the chemistry of oxygen compounds, having developed the radical theory initiated by Guyton de Morveau, formulated the hypothesis that vegetable and animal substances were oxides of radicals composed of carbon and hydrogen; moreover, since simple radicals (the elements) can form more than one oxide, he attributed the same character to his hydrocarbon radicals: he considered, for instance, sugar to be a neutral oxide and oxalic acid a higher oxide of a certain radical, for, when oxidized by nitric acid, sugar yields oxalic acid. In the preceding sketch we have given a necessarily brief account of the historical development of analytical chemistry in its main branches. After studying chemistry for six years under A. Chemistry was the subject which at this time seems to have engaged the greatest share of his attention. General Tendencies Since Darwin Darwin may be said to have founded the science of bionomics, and at the same time to have given new stimulus and new direction to morphography, physiology, and plasmology, by uniting them as contributories to one common biological doctrine-the doctrine of organic evolution-itself but a part of the wider doctrine of universal evolution based on the laws of physics and chemistry. Experiment definition is - test, trial. Organic Chemistry While inorganic chemistry was primarily developed through the study of minerals - a connexion still shown by the French appellation chimie minerale - organic chemistry owes its origin to the investigation of substances occurring in the vegetable and animal organisms. Our knowledge of the chemistry of thallium is based chiefly upon the labours of Crookes. He also endeavoured with some success to make the general methods of chemistry, as distinguished from its results, the subject of special study and of popular exposition. Berzelius hailed this discovery as marking the dawn of a new era in organic chemistry, and proposed for benzoyl the names "Proin" or "Orthrin" (from irpcoi and dpOpus). There are 500 chemistry-related words in total, with the top 5 most semantically related being chemist, biochemistry, alchemy, science and organic chemistry. This replacement may take place either in the ortho or para positions, giving rise to orthoquinones or to paraquinones; metaquinones do not appear to have been isolated. Toxicologic and hygienic aspects are treated in Tschirsch's Das Kupfer vom Standpunkt der gerichtlichen Chemie, Toxikologie and Hygiene (Stuttgart, 1893). His eldest Son, William Henry Perkin, who was born at Sudbury, near Harrow, on the 17th of June 1860, and was educated at the City of London School, the Royal College of Science, and the universities of Wiirzburg and Munich, became professor of chemistry at the Heriot-Watt College, Edinburgh, in 1887, and professor of organic chemistry at Owens College, Manchester, in 1892. Thus encouraged, he took out a patent for his process, and leaving the College of Chemistry, a boy of eighteen, he proceeded, with the aid of his father and brother, to erect works at Greenford Green, near Harrow, for the manufacture of the newly discovered colouring matter, and by the end of 1857 the works were in operation. AMINES, in chemistry, derivatives of ammonia in which one or more of the hydrogen atoms are replaced by alkyl or aryl groups. - Example Sentences for chemistry use the word chemistry in a sentence Although for a long time lecturers and professors had been attached to universities, generally their duties had also included the study of physics, mineralogy and other subjects, with the result that chemistry received scanty encouragement. Chemistry and physics, however, meet on common ground in a well-defined branch of science, named physical chemistry, which is primarily concerned with the correlation of physical properties and chemical composition, and, more generally, with the elucidation of natural phenomena on the molecular theory. Thou hast an excellent natural disposition, without which all science is naught. The chemistry of lichens is very complex, not yet fully investigated and can only be very briefly dealt with here. At the same time, however, he adhered to the classification of Lemery; and it was only when identical compounds were obtained from both vegetable and animal sources that this subdivision was discarded, and the classes were assimilated in the division organic chemistry. The work achieved by Russian savants, especially in biology, physiology and chemistry, and in the sciences descriptive of the vast territory of Russia, is well known to Europe. AMIDINES, in organic chemistry, the nan e given to compounds of general formula R. While studying architecture at Giessen he came under the influence of Liebig and was induced to take up chemistry. He made important researches in photochemistry, made portrait photography possible by his improvements (1839) on Daguerre's process, and published a Text-book on Chemistry (1846), Text-book on Natural Philosophy (1847), Textbook on Physiology (1866), and Scientific Memoirs (1878) on radiant energy. The Board of Agriculture in 1803 had commissioned Sir Humphry Davy to deliver a course of lectures on the connexion of chemistry with vegetable physiology. Only first 15 results shown. In technological chemistry it finds application as a reducing agent, e.g. His earlier work included an investigation of succinic acid, and the preparation of phenyl cyanide (benzonitrile), the simplest nitrile of the aromatic series; but later his time was mainly occupied with questions of technology and public health rather than with pure chemistry. For the detailed chemical significance of these terms, see Chemistry; and for the atomic theory of the chemist (as distinguished from the atomic or molecular theory of the physicist) see Atom; reference may also be made to the article Matter. Listen to all | All sentences (with pause) Used with adjectives: " She teaches physical. He published a Lehrbuch der organischen Chemie in 1854, smaller textbooks of organic and inorganic chemistry in 1877-1883, and Zur Entwickelungsgeschichte der theoretischen Chemie in 1881. ACETOPHENONE, or PHENYL-METHYL KETONE, C8H8O or C6H5CO.CH3, in chemistry, the simplest representative of the class of mixed aliphatic-aromatic ketones. The first and greatest aim of the Positive Philosophy is to advance the study of society into the third of the three stages, - to remove social phenomena from the sphere of theological and metaphysical conceptions, and to introduce among them the same scientific observation of their laws which has given us physics, chemistry, physiology. Among his books were - Handbook of Chemistry (with C. L. After leaving Westminster school, he was apprenticed, in 1802, to his brother, an apothecary, with the view of adopting the profession of medicine, but his bent was towards chemistry, a sound knowledge of which he acquired in his spare time. 5. Several journals are published specially to deal with physical chemistry, of which electrochemistry forms an important part. In his earlier years he devoted himself to chemistry, both theoretical and applied, publishing papers on the preparation of gold and platinum, numerical relations between the atomic weights of analogous elements, the formation of aventurine glass, the manufacture of illuminating gas from wood, the preservation of oil-paintings, &c. The reaction known by his name for the detection of bile acids was published in 1844. For further information, the reader is referred to any standard work on organic chemistry. Daunou (October 1795), which divided the pupils of the " central schools " into three groups, according to age, with corresponding subjects of study: (r) twelve to fourteen, = drawing, natural history, Greek and Latin, and a choice of modern languages; (2) fourteen to sixteen, - mathematics, physics, chemistry; (3) over sixteen, - general grammar, literature, history and constitutional law. Odling as Waynflete professor of chemistry at Oxford. The number of periodicals devoted to chemistry has steadily increased since the early part of the 19th century. So he left school chemistry as he had forsaken university culture, and started for the mines in Tirol owned by the wealthy family of the Fuggers. Fourcroy at the Ecole Polytechnique, where subsequently (1809) he became professor of chemistry, and from 1808 to 1832 he was professor of physics at the Sorbonne, a post which he only resigned for the chair of chemistry at the Jardin des Plantes. He laid the foundation of what will probably prove to be a new and more precise form of chemistry (see CHEMISTRY, and MATTER, CONSTITUTION OF). 238+16 sentence examples: 1. Here are some examples. On his arrival in Russia he rapidly rose to distinction, and was made professor of chemistry in the university of St Petersburg; he ultimately became_rector, and in 1764 secretary of state. Scheele enriched the knowledge of chemistry by an immense number of facts, but he did not possess the spirit of working systematically as Bergman did. So well was his position as a leading man of science now established that in 1854 he was appointed professor of chemistry and dean of the Faculte des Sciences at Lille. The transformations of these two forms are discussed in Chemistry: Physical. Most of his work, however, lay in the domain of inorganic chemistry. In 1836 he entered Marischal College, and came under the influence of John Cruickshank, professor of mathematics, Thomas Clark, professor of chemistry, and William Knight, professor of natural philosophy. With Professor J. Stahl was the author of the theory of" phlogiston "in chemistry, which in its day had great importance. For the chemistry of copper and its compounds see the references in the article Chemistry: Inorganic. Travers, The Experimental Study of Gases (1901); and vapour density determinations in Lassar-Cohn's Arbeitsmethoden fur organisch-chemische Laboratorien (1901), and Manual of Organic Chemistry (1896), and in H. He then devoted himself with astonishing ardour to mathematics, chemistry, natural history, technology and even political economy. Shepherd in the Journal of Physical Chemistry, may also be consulted. mean? OXIMES, in organic chemistry, compounds containing the grouping > C: N OH, derived from aldehydes and ketones by condensing them with hydroxylamine. He initiated in 1866 the spectroscopic observation of sunspots; applied Doppler's principle in 1869 to determine the radial velocities of the chromospheric gases; and successfully investigated the chemistry of the sun from 1872 onward. In 1872, Hoppe-Seyler (1825-1895) gave a new beginning to our knowledge of the chemistry of secretion and of excretion; and later students have increased the range of physiological and pathological chemistry by investigations not only into the several stages of albuminoid material and the transitions which all foodstuffs undergo in digestion, but even into the structure of protoplasm itself. When the positive method has been finally extended to society, as it has been to chemistry and physiology, these social facts will be resolved, as their ultimate analysis, into relations with one another, and instead of seeking causes in the old sense of the word, men will only examine the conditions of social existence. It has been supposed that this theory was suggested to him either by researches on olefiant gas and carburetted hydrogen or by analysis of "protoxide and deutoxide of azote," both views resting on the authority of Dr Thomas Thomson (1773-1852), professor of chemistry in Glasgow university. His contributions to inorganic chemistry were numerous, including investigations on the compounds of antimony, aluminium, silicon, &c., on the separation of nickel and cobalt, and on the analysis of mineral waters, but they are outweighed in importance by his work on organic substances. He advanced chemistry, botany, anatomy, as well as physiology, and was incessantly occupied in endeavouring to apply his scientific studies to practical medicine, thus continuing the work of his great teacher Boerhaave. He was well acquainted with the works of the ancient physicians, and probably fairly so with chemistry. In 1837 he was elected professor of chemistry in the University of the City of New York, and was a professor in its school of medicine in 1840-1850, president of that school in 1850-1873, and professor of chemistry until 1881. How To Use The Chemistry In A Sentence? Its chief aim was to reconcile the new views in physiology and chemistry with practical medicine. OLEFINE, in organic chemistry, the generic name given to open chain hydrocarbons having only singly and doubly linked pairs of carbon atoms. It is extremely hygroscopic and is 'used in synthetical organic chemistry as a condensing agent. and it seems highly probable by this delicate mode of analysis that the hypothetical position of any hydrogen which is replaced may be identified, a point which is of prime importance in organic chemistry. Notwithstanding these errors, the value of the " ethyl theory " was perceived; other radicals - formyl, methyl, amyl, acetyl, &c. - were characterized; Dumas, in 1837, admitted the failure of the etherin theory; and, in company with Liebig, he defined organic chemistry as the " chemistry of compound radicals.". 32. Then I fell to studying all the science of color and all the theories which are woven about it. In England this branch of chemistry is especially cared for by the Institute of Chemistry, which, since its foundation in 1877, has done much for the training of analytical chemists. We can form compound sentences using Conjugative adverbs too. Mitscherlich as professor of chemistry and director of the laboratory in Berlin University. In 1904 he delivered at the university of California a course of lectures, the object of which was to illustrate the application of the methods of physical chemistry to the study of the theory of toxins and antitoxins, and which were published in 1907 under the title Immunochemistry. Gladstone as Fullerian professor of chemistry in the Royal Institution, London. In the application of chemistry to the examination of secretions Willis made some important steps. Next, at the instance of Charles IV., he went to Spain, where he taught chemistry first at the artillery school of Segovia, and then at Salamanca, finally becoming in 1789 director of the royal laboratory at Madrid. Sodamide was introduced by Claisen (Ber., 1905, 3 8, p. 6 93) as a condensing agent in organic chemistry, and has since been applied in many directions. Increasing attention was paid to the investigation of the properties of substances and of their effects on the human body, and chemistry profited by the fact that it passed into the hands of men who possessed the highest scientific culture of the time, Still, belief in the possibility of transmutation long remained orthodox, even among the most distinguished men of science. For medicine in England Harvey did what William Gilbert did for physics and Robert Boyle for chemistry: he insisted upon direct interrogation of natural processes, and thereby annihilated the ascendancy of mere authority, which, while nations were in the making, was an essential principle in the welding together of heterogeneous and turbulent peoples. Fresenius, the founder of the Zeitschrift fiir analytische Chemie (1862), we are particularly indebted for perfecting and systematizing the various methods of analytical chemistry. The science teacher was giving us a pop quiz on the subject of exothermic compounds. In 1886 the completion of his hundredth year was celebrated with public rejoicings; and after his death, which occurred in Paris on the 9th of April 1889, he was honoured with a public funeral. These spellings should be used in all chemistry-related articles on English Wikipedia, even if they conflict with the other national spelling varieties used in the article. Now taking the isomers H 3 C CC1 3 (M„ = 108) and C1H 2 C CHC1 2 (M„ = we see the negative chlorine atoms heaped up in the left hand formula, but distributed in the second; the former therefore may be presumed to occupy a larger space, the molecular volume, that is, the volume in cubic centimetres occupied by the molecular weight in grams, actually being 108 in the former, and 103 in the latter case (compare Chemistry: Physical). It may be convenient here to state how the whole subject of chemistry is treated in this edition of the Encyclopaedia Britannica. Besides the subjects of theory and practice of medicine, he lectured systematically on botany, materia medica and chemistry. As a synthetical agent in organic chemistry, aluminium chloride has rendered possible more reactions than any other substance; here we can only mention the classic syntheses of benzene homologues. Sign in with your Pearson account. Cornwall is a place and thus … Anatomy and the study of animal mechanism, animal physics and animal chemistry, all of which form part of a true zoology, were excluded from the usual definition of the word by the mere accident that the zoologist had his museum but not his garden of living specimens as the botanist had; 1 and, whilst the zoologist was thus deprived of the means of anatomical and physiological study - only later supplied by the method of preserving animal bodies in alcohol - the demands of medicine for a knowledge of the structure of the human animal brought into existence a separate and special study of human anatomy and physiology. Listen to all | all sentences ( with pause ) Used with:. Alkaloid, in 1876, he lectured systematically on botany, materia medica and chemistry.! Views in Physiology and chemistry at Lyons they have departments of architecture, building, civil engineering, chemistry Physiology. 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