Proceedings of the National Academy of Sciences of the United States of America

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National Academy of Sciences, 1918 - Electronic journals
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The Proceedings of the National Academy of Sciences (PNAS) publishes research reports, commentaries, reviews, colloquium papers, and actions of the Academy. PNAS is a multidisciplinary journal that covers the biological, physical, and social sciences.

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Page 251 - Sciences is therefore requested to perpetuate the National Research Council, the duties of which shall be as follows: 1. In general, to stimulate research in the mathematical, physical and biological sciences, and in the application of these sciences to engineering, agriculture, medicine and other useful arts, with the object of increasing knowledge, of strengthening the national defense, and of contributing in other ways to the public welfare.
Page 413 - Navy for the fuller development and production of devices relating to Naval Ordnance. Division of Chemistry and Chemical Technology. — In addition to the regular meetings on Wednesday and Friday mornings the Division held a special evening meeting on August 28 for the purpose of discussing the arrangement of courses and recommending curricula for the war training of chemists and chemical engineers; this conference was attended by practically all of those now resident in Washington who are especially...
Page 251 - To promote cooperation in research, at home and abroad, in order to secure concentration of effort, minimize duplication, and stimulate progress: but in all cooperative undertakings to give encouragement to individual initiative as fundamentally Important to the advancement of science.
Page 251 - To direct the attention of scientific and technical investigators to the present importance of military and industrial problems in connection with the war, and to aid in the solution of these problems by organizing specific researches. 6. To gather and collate scientific and technical information, at home and abroad, in cooperation with governmental and other agencies, and to render such information available to duly accredited persons. Effective prosecution of the Council's work requires the cordial...
Page 125 - To serve as centers of distribution to our Allies in Europe of scientific, technical, and industrial research information originating in the United States and transmitted through the Research Information Committee in Washington.
Page 251 - Council shall be as follows: (a) In general, to stimulate research In the mathematical, physical, and biological sciences, and In the application of these sciences to engineering, agriculture, medicine, and other useful arts, with the object of Increasing knowledge, of strengthening the national defense, and of contributing in other ways to the public welfare.
Page 126 - Washington a comparatively small body of men represent ing the existing committees, and thus provide for effective cooperation in the rapid organization of medical research as an aid to the solution of urgent military problems. Field. — Medicine, Surgery, Hygiene, Physiology, Anatomy, Psychology, Psychiatry, Physical Anthropology, and closely related subjects. Methods. — 1. To cooperate closely with the Surgeon General of the Army (through Colonel Russell) and of the Navy (through Dr. Stitt)...
Page 90 - Both seem to be based on reasonable assumptions. Future investigation must decide which is more useful. In any event, it is clear that much is to be learned concerning the dynamics of photosynthesis, and it is hoped that the considerations here set forth may be of value in this connection. Summary. — Ulva which has been kept in the dark begins photosynthesis as soon as it is exposed to sunlight. The rate of photosynthesis steadily increases until a constant speed is attained. This may be explained...
Page 381 - A rippling movement of the outline of the body usually accompanies the 'body-waves,' and when viewed from above this is the only contractile operation to be seen. The peripheral rippling may, however, be very slight or even absent altogether. Neither of these flat-worms has been observed to creep in any but an anterior direction. These observations tend to show that in turbellarians generally, muscular operations analagous to those executed by the foot of chitons and of gastropods are essentially...
Page 392 - ... times this weight of limestone appears to be removed annually by holothurians and by currents, and other factors such as boring algae, mollusca and fishes; the efficacy of which we have "not been able to calculate, add still more to the destruction of limestone although their influence is in some measure offset by the growth of nullipore algae, and lithothamnion. Alcyonaria although a decided factor in some reefs are so rare as to be negligible over the Aua reef-flat. In most respects this Aua...

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