Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

A Natural Scientist

Natur-wissensebaft, /. natural science, -wis-senscbaftler, m. natural scientist, naturwissenschaftbeh, a. of or pertaining to natural science, scientific. [Pg.314]

A perennial subject of concern is the long-term availability of energy resources. Natural scientists and... [Pg.459]

One of the most important reasons for man s progress in understanding and controlling his environment is his ability to communicate knowledge to the next generation. It isn t necessary for each twentieth century scientist to invent the atomic description of matter. This was invented by John Dalton in the nineteenth century, and Dalton recorded his ideas in the scientific literature together with the observations that led him to the model. By study of this and subsequent literature a modern scientist can appraise the nature of the description, the facts it will explain, and the limitations. He is quickly able to approach the frontiers of knowledge—the frontiers defined by the limitations in our accepted models of the behavior of matter. [Pg.12]

The periodic table orders the elements in a way that helps chemists understand why atoms behave as they do. What makes fluorine react violently with cesium while its nearest neighbor neon is reluctant to react with anything In other words, what gives the elements their properties and what order lies below the surface of their seemingly random nature Scientists know now that the periodicity of the elements is due largely to recurring patterns in their electron configurations. [Pg.58]

To a computer scientist, VS is nothing but another text mining, only the bits and bytes stored that contain molecular information adopt a format quite different from natural language and without adequate warning cannot be quickly interpreted. It is not that modem day text does not contain text that is not natural language, but that they are adequately flagged and do not stop the NLP software. For example,... [Pg.113]

Roald Hoffmann. A Natural-Born Fiber. American Scientist. 85 (Jan.-Feb., 1997) 21. Source for rayon. [Pg.226]

Why have companies been allowed to discharge mercury into rivers and lakes The reason is that the discovery of such high concentration levels was a surprise to nearly everyone. It was not until 1965 that a Swedish scientist discovered that inorganic mercury could be converted under natural conditions to methyl mercury. 10 Also, as has just been noted, it was not until very recently that a method for easily measuring mercury at very low levels was available. Once the danger was recognized in 1970, the industry responded very quickly. For instance, Dow Chemical reduced its discharge of mercury from 200 lb/day(90 kg/day) to 0.5 lb per day (0.25 kg/day) in less than 12 months.12... [Pg.426]

The many possible errors, as well as the difficulties inherent to the radiocarbon dating method itself, serve to emphasize the need for a close collaboration between archaeologists and natural scientists when dating archaeological samples by the radiocarbon method. [Pg.311]

In the course of his studies of the dyeing process, he became deeply interested in the structure of natural fibers, and most of his efforts were directed toward this new field of research, with the help of able associates, among them R. Brill, M. Dunkel, G. von Susich, and E. Valkd. His investigation of various aspects of the problem utilized physical means (for example, x-ray diffraction, optical properties, and viscosity) and the purely chemical approach. A young scientist, H. Mark, who later became an authority in the field of high polymers, was appointed head of the physical chemistry laboratory. [Pg.473]

For example, E. G. Mazurs (note 2, p. 105) expresses the discord as follows The periodicity of atomic structure must be accepted as a Natural Law. Therefore, scientists have to change their minds, get away from the conservatism that accepts only Mendeleev s chemical table as right, and adjust the other phenomena to this phenomenon that is, derive the chemical and physical properties of the elements from the electronic structure of the atoms. ... [Pg.722]

On September 17, 2006, the world lost a great scientist, the world s elephants lost a tireless benefactor, and we lost a superb collaborator, wise mentor, and dear friend. Dr. L.E.L. Bets Rasmussen was a wonderful and remarkable human being, with an infectious joie de vivre, boundless energy, a brilliant and probing intellect, an insatiable curiosity about nature, and an impish wit. She was clearly the world s leading authority on chemical communication among elephants, and a leader in the study of elephant biochemistry. [Pg.2]

He never gave unbridled rein to his synthetic efforts, nor did he fall into the temptation of purposeless synthesis. He always remained a true scientist—a student of nature.. . . This great individual was a man of inflexible veracity and simplicity.. . . Emil Fischer s life was based on responsibility a responsibilityfor the austerity andpurity of his work and its aims, responsibility for the university as an important organ of our cultural and economic life, and responsibility for each of his students. [Pg.15]

Hesse s second source, Die Arzneimittel Synthese by Sigmund Frankel, was a largely theoretical work by a prominent scientist. Frankel tried to establish direct and specific relationships between chemical structure and physiological activity. In this book Hesse found broad assertions, such as the statement that all unsulfonated azo dyes were harmful, as well as specific claims. Although it was perhaps natural that, as an organic chemist,... [Pg.140]

Until twenty-five or thirty years ago, few laboratories around the world were seriously interested in these insect-eating nematodes and their bacteria, but agricultural and industrial scientists are now studying them enthusiastically. Mounting pressures to limit the use of synthetic chemical pesticides have had their effect, and the nematode-bacteria complex may offer a natural environmentally safe biopesticide. Both creatures are harmless to vertebrates, but the bacterial toxins are fatal to a wide spectrum of agricultural pests. An added advantage is that the nematodes actively seek out their hosts, something other pesticides cannot do. [Pg.131]

Indeed, between the mid-1920s and the end of World War II, Caucasian as a natural division of humanity became part of a popular national catechism. Scientists apply the term race only to the broadest subdivisions of mankind, Negro, Caucasian, Mongolian, Malayan, and Australian, explained a 1939 handbook for high school teachers, all... [Pg.101]

Spectroscopic studies have played an important role in the evaluation of petroleum and of petroleum products for the last three decades, and many spectroscopic methods are now used as standard methods of analysis of petroleum and its products before and after a spill. Application of these methods to petroleum and its end products is a natural consequence for the environmental scientist and engineer. [Pg.45]


See other pages where A Natural Scientist is mentioned: [Pg.462]    [Pg.399]    [Pg.88]    [Pg.344]    [Pg.457]    [Pg.623]    [Pg.625]    [Pg.680]    [Pg.63]    [Pg.38]    [Pg.462]    [Pg.399]    [Pg.88]    [Pg.344]    [Pg.457]    [Pg.623]    [Pg.625]    [Pg.680]    [Pg.63]    [Pg.38]    [Pg.477]    [Pg.285]    [Pg.157]    [Pg.240]    [Pg.459]    [Pg.818]    [Pg.523]    [Pg.562]    [Pg.732]    [Pg.347]    [Pg.305]    [Pg.99]    [Pg.20]    [Pg.256]    [Pg.66]    [Pg.200]    [Pg.1410]    [Pg.414]    [Pg.102]    [Pg.13]    [Pg.95]    [Pg.106]    [Pg.43]    [Pg.243]   


SEARCH



Scientists

© 2024 chempedia.info