منابع مشابه
Psychiatrists' education in psychology: jackdaw or sponge?
In his book The Organisation of Behaviour (1949), Donald Hebb remarked that: 'If some psychologists jibe at the physiologist for a bedfellow, many physiologists would agree with them heartily.' Much the same could be said of any proposed betrothal between psychologist and psychiatrist. Theirs has been an erratic and tempestuous relationship in which heated disputes and fervent antipathy have be...
متن کاملSieve Plates and Habitat Adaptation in the Foraminifer Planulina ornata
Planulina ornata (d'Orbigny), a coarsely perforate species of foraminifera having a low trochospiral test, was recovered attached to phosphatic hardgrounds from the lower oxygen-minimum zone off Peru. Above the base of individual pores are calcified, perforate sieve plates, the largest so far described. Structure of the pores suggests a possible association with mitochondria and respiratory fun...
متن کاملModern Benthic Foraminifer Distribution in the Amerasian Basin, Arctic Ocean
A total of 38 box cores were collected from the Amerasian Basin, Arctic Ocean during the U.S. Geological Survey 1992 (PI92-AR) and 1993 (PI93-AR) Arctic Cruises aboard the U.S. Coast Guard Icebreaker Polar Star. In addition, the cruises collected geophysical data, piston cores and hydrographic data to address the geologic and oceanographic history of the western Arctic Ocean. This paper reports...
متن کاملOrigin of the Eocene Planktonic Foraminifer Hantkenina by Gradual Evolution
Hantkenina is a distinctive planktonic foraminiferal genus characterized by the presence of tubulospines (robust hollow projections) on each adult chamber, from Middle and Upper Eocene marine sediments worldwide. Here we illustrate its evolutionary origin using c. 150 specimens from 30 stratigraphic intervals in two sediment cores from Tanzania. The specimens, which span an estimated time inter...
متن کاملMg/Ca temperature calibration for the benthic foraminifer Cibicidoides pachyderma
[1] The recent development of foraminiferal Mg/Ca as a paleotemperature proxy has enabled the extraction of global ice volume and local salinity from the more traditional paleotemperature proxy dO. The benthic foraminiferal genus Cibicidoides is widely used in paleoceanographic reconstructions because of its epifaunal habitat and cosmopolitan distribution, and it has received early attention in...
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ژورنال
عنوان ژورنال: Nature
سال: 1893
ISSN: 0028-0836,1476-4687
DOI: 10.1038/047390a0