557 resultados para 1067


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Also issued as a dissertation of Ángel Gonzáles Palencia, Madrid, 1955.

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Publisher's no.: Edition Schott 1067.

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Caption title.ent

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Includes bibliographical references.

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Mode of access: Internet.

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Publisher's imprint varies.

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"Abbreviatio chronicorum Angliae," v. 3, p. 151-348, erroneously attributed to Paris by the editor. cf. Dict. nat. biog.

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Text and translation of his Taqwīm al-Dhihn.

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"A satire on the Rev. Isaac Fidler's 'Travels in America.'"--Sabin.

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"A composite chronicle, containing the St. Albans compilation to the end of 1188, Roger de Wendover's chronicle, 1189-1235, both revised by Paris, and his own work from 1235 to 1259." -Dict. nat. biog.

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Acquisition made accessible thanks to the generous support of the Frederick J. and Margret L. Worden Endowment.

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Pt.5: Hearings before the Public Health, Education, Welfare, and Safety Subcommittee.

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Bull sharks (Carcharhinus leucas) were captured across a salinity gradient from freshwater (FW) to seawater (SW). Across all salinities, C leucas were hyperosmotic to the environment. Plasma osmolarity in FW-captured animals (642 +/- 7 mosM) was significantly reduced compared to SW-captured animals (1067 +/- 21 mosM). In FW animals, sodium, chloride and urea were 208 +/- 3, 203 +/- 3 and 192 +/- 2 mmol l(-1), respectively. Plasma sodium, chloride and urea in SW-captured C leucas were 289 +/- 3, 296 +/- 6 and 370 +/- 10 mmol l(-1), respectively. The increase in plasma osmolarity between FW and SW was not linear. Between FW (3 mosM) and 24%o SW (676 mosM), plasma osmolarity increased by 22% or 0.92% per 1parts per thousand rise in salinity. Between 24%o and 33parts per thousand, plasma osmolarity increased by 33% or 4.7% per 1 parts per thousand rise in salinity, largely due to a sharp increase in plasma urea between 28parts per thousand and 33parts per thousand. C. leucas moving between FW and SW appear to be faced with three major osmoregulatory challenges, these occur between 0-10parts per thousand, 11-20parts per thousand and 21-33parts per thousand. A comparison between C leucas captured in FW and estuarine environments (20-28%o) in the Brisbane River revealed no difference in the mass of rectal glands between these animals. However, a comparison of rectal gland mass between FW animals captured in the Brisbane River and Rio San Juan/Lake Nicaragua showed that animals in the latter system had a significantly smaller rectal gland mass at a given length than animals in the Brisbane River. The physiological challenges and mechanisms required for C leucas moving between FW and SW, as well as the ecological implications of these data are discussed. (C) 2004 Elsevier Inc. All rights reserved.