Mineralogical information in the diary of D. G. Messerschmidt on the route of the future Siberian expedition of P. S. Pallas: materials for the study of scientific continuity

This work is aimed at detectinginformation from the field of mineralogy in the documentary heritage of the first scientific expedition to Siberia by D. G. Messerschmidt. The analysis was made of an expedition diary, the original of which is kept in the St. Petersburg Branch of the Archive of the Russian Academy of Sciences, – the fragmentsthat describes Messerschmidt’s Siberian route, coinciding with the future route of P. S. Pallas, who visited many of the Siberian regions that Messerschmidt had explored half a century before. Messerschmidt recorded data on several groups of minerals, including salts, metals, clays, micas, etc.The question of Messerschmidt’s creation of his mineralogical collections, as well as their systematics and cataloging deserves special study. The analysis of the results of the Messerschmidt’sobservations provides material for establishing the influence on Pallas of the first German scientist traveler, despite the fact that Pallas knew well Messerschmidt’s scientific heritage and made his efforts to make it public.

The influence of rectangular shape holes on energy intensity of grinding grain

Grain before feeding to animals exposed to grinding with the purpose of increasing its digestibility. As a result of this increases the area of interaction of the feed with the gastric juice and decreases the conversion coefficient. Surface theory formulated by German scientist Rittinger, suggests that the work of AR required for the grinding process is directly proportional to newly formed surface. The purpose of this paper is a theoretical evaluation of the intensity of grinding with the use of sieves with rectangular and circular shape holes. When getting groats with the same grinding module by the use of sieves with holes of rectangular shape, one should expect the decrease of specific energy intensity. By reducing the content of dust-like fractions and reduce the total surface feed should be expected to reduce the energy intensity of pneumo transportation.

Sand Clock and The Concept of Time in Einstein’s Theory of Relativity

The sand clock is a device used to measure time, consisting of two conical glass bulbs, which are connected vertically by a small opening neck. The top contains grains of fine dry sand. The upper part symbolizes the future, sand passes through the neck (which indicates present) to the lower part which turned past. In 1907, German scientist Hermann Minkowski (1864-1909) interpreted the concept of the four-dimensional space-time of Einstein's theory in a two-dimensional cone diagram, in which the upper cone symbolizes the future, the neck the present and the lower part the past. The researcher has noticed a great likeness, to the point of congruence between the shape and function of both, the sand clock and the diagram. This resemblance aroused speculations that Hermann Minkowski had been inspired by the sand hour in drawing his diagram. It cannot be attributed to a merely chance.

History Of Great Discoveries In Physics

History of great discoveries in physics french scientist AA Beckerel, german physicist VK Rentgen, english physicist, founder of nuclear physics, polish scientists E. Rutherford, french physicists Maria and Pierre Curie, german scientist G. Schmut, Russian chemist D.I. Mendeleev, english physicist and chemist F. Simple, romanian chemist and physicist G.Heveshi, austrian radiochemist and chemist F.Panet, english physicist J.D.Cockroft, Irish physicist E.T.S. Walton, the english physicist-experimenter J. Chedwick, is directly and indirectly associated with the names of the italian scientist E. Fermi.

The influence of rectangular shape holes on energy intensity of grinding grain

Grain before feeding to animals exposed to grinding with the purpose of increasing its digestibility. As a result of this increases the area of interaction of the feed with the gastric juice and decreases the conversion coefficient. Surface theory formulated by German scientist Rittinger, suggests that the work of AR required for the grinding process is directly proportional to newly formed surface. The purpose of this paper is a theoretical evaluation of the intensity of grinding with the use of sieves with rectangular and circular shape holes. When getting groats with the same grinding module by the use of sieves with holes of rectangular shape, one should expect the decrease of specific energy intensity. By reducing the content of dust-like fractions and reduce the total surface feed should be expected to reduce the energy intensity of pneumo transportation.

Study on Trichoderma Citrinoviride 31/4 – Antagonistic Activity and Jasmonic Acid

The genus Trichoderma was first identified by the German scientist Persoon in 1974, and there are currently 89 species in the genus. Trichoderma fungi often break down organic compounds in the soil into minerals and plays an important role in soil fertility formation. Trichoderma citrinoviride 31/4 isolated from the soil forms a colony with light yellow-green mycelium on the surface of the PDA medium, with spherical spore, septate hyphae, branched conidophores. Trichoderma citrinoviride 31/4 had antagonistic activity of 66.7% against Cladosporium fulvum, 77.5% against Alternaria alternata, and 59.1% against Fusarium oxysporium after 7 days. Experimental results showed that the progress of tomato alternariosis treated with Trichoderma citrinoviride 31/4 was neutralized from the 7th day, and the biological activity was averagely 74% on the 21st day. Trichoderma citrinoviride 31/4 contains 0.0135 mg / kg of jasmonic acid in plants treated with 109 cell / ml and 0.0076 mg/kg in plants treated with 108 cell / ml.

The association of rectangular shape holes on energy intensity of grinding grain

Grain before feeding to animals exposed to grinding with the purpose of increasing its digestibility. As a result of this increases the area of interaction of the feed with the gastric juice and decreases the conversion coefficient. Surface theory formulated by German scientist Rittinger, suggests that the work of AR required for the grinding process is directly proportional to newly formed surface. The purpose of this paper is a theoretical evaluation of the intensity of grinding with the use of sieves with rectangular and circular shape holes. When getting groats with the same grinding module by the use of sieves with holes of rectangular shape, one should expect the decrease of specific energy intensity. By reducing the content of dust-like fractions and reduce the total surface feed should be expected to reduce the energy intensity of pneumo transportation.

On the Publication of Articles by Carl Dahlhaus Translated by Stepan Naumovich

В рецензии рассматривается сборник избранных статей выдающегося немецкого музыковеда ХХ столетия Карла Дальхауза (Дальхаус, Карл. Избранные труды по истории и теории музыки / сост., пер. с нем., послесл., коммент. С. Б. Наумовича. Санкт-Петербург: Издательство имени Н. И. Новикова, 2019), ставший первым репрезентативным изданием работ ученого на русском языке (фамилия ученого транслитерирована С. Наумовичем как «Дальхаус»). Отмечается универсализм и разносторонность научных интересов ученого, дающие полное основание назвать его философом музыки и ученым энциклопедической образованности (Дм. Чехович). С. Наумовичем, выступившим в роли не только переводчика, но и составителя, а также автора разделов «Послесловие» и «Комментарии», убедительно освещено научное наследие Дальхауза в целом, охарактеризован контекст, в котором создавались его труды, приведены важные биографические подробности. Перевод, выполненный С. Наумовичем, отличается высоким уровнем и рядом бесспорных достоинств. По мнению рецензента, книгу естественно дополнили бы выдержки из работ российского музыковеда и эстетика Т. В. Чередниченко, уделявшей Дальхаузу немало внимания. Отдельно упомянут венский критик Э. Ганслик, ряд положений которого был созвучен мыслям немецкого ученого. Рецензентом затронута также проблема чисто рационального отношения к музыке, в необходимости которого Дальхауз был убежден: здесь он выступил продолжателем и последователем М. Вебера и Т. В. Адорно. The review examines a collection of selected articles by the prominent German musicologist of the 20th century Carl Dahlhaus (Dahlhaus, Carl. Selected works on the history and theory of music / comp., transl. from German, post-title, comment. by S. B. Naumovich. St. Petersburg: Izdatel’stvo imeni N. I. Novikova, 2019), which became the first representative edition of the scientist's writings in Russian (the scientist’s surname is transliterated by S. Naumovich as “Дальхаус”). The reviewer notes the universalism and versatility of the musicologist’s scientific interests, which give the full reason to call him a philosopher of music and a scholar of encyclopedic education (Dm. Chekhovich). S. Naumovich, who acted not only as a translator, but also as a compiler, as well as the author of the afterword, convincingly highlighted Dahlhaus’s scientific heritage in general, characterized the context in which his writings were created, and provided important biographical details. The translation made by S. Naumovich is considered to be a high quality work and have a number of indisputable advantages. According to the reviewer, the book could naturally be supplemented by excerpts from the works by the Russian musicologist and esthetician Tatiana V. Cherednichenko, who devoted much of her consideration to Dahlhaus. A particular attention is paid to the Viennese critic Eduard Hanslick, whose provisions were in tune with the thoughts of the German scientist. The reviewer also touched on the problem of a purely rational attitude to music/ which Dahlhaus was convinced of: here the musicologist is seen as a successor and heir of Max Weber and Theodor W. Adorno.

Gustav Mie: the man, the theory

Gustav Mie was a German scientist who published a rigorous electromagnetic scattering theory by a spherically shaped particle in 1908, but which only began to attract attention some fifty years later. How then did Gustav Mie, who was initially attracted to science by his interest in mathematics and mineralogy, publish a ‘hidden gem’ that now shines so brightly over physics?