The Royal Society

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Late quaternary history of vegetation and climate of the Rajasthan desert, India
The Royal Society - Tập 267 Số 889 - Trang 467-501 - 1974
G. Singh, Rajesh Joshi, Suman Chopra, A. B. Singh
The results from stratigraphy, radiocarbon dating and pollen analysis of three salt-lake deposits at Sambhar, Lunkaransar and Didwana in western Raj'asthan, and one freshwater lake deposit at Pushkar in the Aravalli Hills, are described in conjunction with pollen analysis of some archaeological soil samples from the Indus Valley site at Kalibangan in northern Rajasthan. The sa...... hiện toàn bộ
Specific impairments of planning
The Royal Society - Tập 298 Số 1089 - Trang 199-209 - 1982
T Shallice
An information-processing model is outlined that predicts that performance on non-routine tasks can be impaired independently of performance on routine tasks. The model is related to views on frontal lobe functions, particularly those of Luria. Two methods of obtaining more rigorous tests of the model are discussed. One makes use of ideas from artificial intelligence to derive a task heavi...... hiện toàn bộ
Cytopathogenicity of Entamoeba histolytica
The Royal Society - Tập 307 Số 1131 - Trang 73-85 - 1984
Carlos Gitler, Edna Calef, Ian M. Rosenberg
The lesions induced in man by Entamoeba histolytica are characterized by massive tissue injury in the absence of major local signs of a host immune response. The amoeba damages surrounding cells preferentially by contact-mediated cytolysis. Recently, a presumptive aetiological factor underlying this process has been identified...... hiện toàn bộ
Unstalked crinoids of the antarctic continental shelf, notes on their natural history and distribution
The Royal Society - Tập 246 Số 734 - Trang 327-379 - 1963
John W. Marr
An account is given of the natural history, distribution and relative abundance of the comatulids of the Antarctic continental shelf. On the whole they form a distinctive geographical assemblage, that, cut off from northern influence, has evidently evolved in isolation since at least from the beginning of the Pleistocene or Quaternary Period. Where large enough numbers have been encountere...... hiện toàn bộ
Diet and teeth: Dietary hypotheses and human evolution
The Royal Society - Tập 292 Số 1057 - Trang 57-64 - 1981
Alan Walker
Hypotheses concerning the diet of early hominids have played an important role in discussions on human evolution. Three investigations have helped define the extent to which dietary hypotheses may be taken and still be testable. Comparative anatomy is a fairly coarse approach, which despite convergences allows only the most specialized diets to be ruled out. A biomechanical analysis makes ...... hiện toàn bộ
Late Quaternary vegetational history of the Enga province of Upland Papua New Guinea
The Royal Society - Tập 286 Số 1012 - Trang 265-344 - 1979
Donald A. Walker, J. R. Flenley
Stratigraphies and pollen analyses are reported from three sites within 25 km east and west from Wabag in the highlands of Papua New Guinea, namely: Sirunki, 2500 m above sea level, 32000 to 1500 yr Inferred Ages; Inim, 2500 m above sea level, 10000 to 0 yr Inferred Ages; Birip, 1900 m above sea level, 2300 to 0 yr Inferred Ages. Events evidenced by these data are described against a time ...... hiện toàn bộ
Central processes in speech understanding
The Royal Society - Tập 295 Số 1077 - Trang 317-332 - 1981
William D. Marslen‐Wilson, Lorraine K. Tyler
Considering the psychological mechanisms of language as functioning psycholinguistic processes, the fundamental question - from the perspective of speech comprehension - is how these processes operate over time to transform a transient sensory input into a meaningful utterance. The research reported here suggests that these processes are organized to allow optimally effective use of the in...... hiện toàn bộ
An anomaly in the response of the eye to light of short wavelengths
The Royal Society - Tập 278 Số 960 - Trang 207-240 - 1977
J. D. Mollon, P. G. Polden
Adaptation of the human eye to long-wavelength light leaves it insensitive to short-wavelengths: a blue flash that is visible in the presence of a yellow adapting field may remain invisible for several seconds after the field has been turned off (see experiment 1 and Appendix). This ‘transient tritanopia’ occurs for a large range of adapting intensities, but is abolished if th...... hiện toàn bộ
The structure of β-lactamases
The Royal Society - Tập 289 Số 1036 - Trang 321-331 - 1980
R P Ambler
The β-lactamases are widely distributed in both Gram-positive and Gram-negative bacteria. They all inactivate penicillins and cephalosporins by opening the β-lactam ring. Many varieties of the enzyme can be distinguished on the basis of their catalytic and molecular properties, but only amino acid sequence determination gives information upon which a molecular phylogeny can be...... hiện toàn bộ
The postcranial skeletal anatomy of the carboniferous tetrapod Greererpeton burkemorani Romer, 1969
The Royal Society - Tập 323 Số 1213 - Trang 75-133 - 1989
Stephen J. Godfrey
The discovery of well-preserved skeletal remains of Greererpeton burkemorani Romer, 1969, from the Upper Mississippian at Greer, West Virginia, has prompted a redescription of its postcranial skeletal anatomy. The vertebrae are rhachitomous, more specifically schizomerous. The presacral count is approximately 41. Neural arch e...... hiện toàn bộ
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