The Royal Society
0080-4622
2054-0280
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Các bài báo tiêu biểu
Cơ sở hóa học của sự hình thành mô hình Dịch bởi AI
Tập 237 Số 641 - Trang 37-72 - 1952
\n Đề xuất rằng một hệ thống các chất hóa học, gọi là morphogen, phản ứng cùng nhau và khuếch tán qua một mô, đủ để giải thích các hiện tượng chính của quá trình hình thành mẫu. Một hệ thống như vậy, mặc dù ban đầu có thể hoàn toàn đồng nhất, nhưng có thể sau đó phát triển thành một mẫu hoặc cấu trúc do sự bất ổn định của trạng thái cân bằng đồng nhất, được kích hoạt bởi các nhiễu loạn ng...... hiện toàn bộ
The structure of the nervous system of the nematodeCaenorhabditis elegansThe structure and connectivity of the nervous system of the nematodeCaenorhabditis elegans has been deduced from reconstructions of electron micrographs of serial sections. The hermaphrodite nervous system has a total complement of 302 neurons, which are arranged in an essentially invariant structure. Neurons with similar morphologies and connectivities have been ... ... hiện toàn bộ
Tập 314 Số 1165 - Trang 1-340 - 1986
Specific impairments of planningAn 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
Tập 298 Số 1089 - Trang 199-209 - 1982
Climate and the efficiency of crop production in Britain
The efficiency of crop production is defined in thermodynamic terms as the ratio of energy output (carbohydrate) to energy input (solar radiation). Temperature and water supply are the main climatic constraints on efficiency. Over most of Britain, the radiation and thermal climates are uniform and rainfall is the main discriminant of yield between regions. Total production of ... ... hiện toàn bộ
Tập 281 Số 980 - Trang 277-294 - 1977
The interpretation of the variations in leaf water potential and stomatal conductance found in canopies in the field
Attempts to correlate values of stomatal conductance and leaf water potential with particular environmental variables in the field are generally of only limited success because they are simultaneously affected by a number of environmental variables. For example, correlations between leaf water potential and either flux of radiant energy or vapour pressure deficit show a diurna... ... hiện toàn bộ
Tập 273 Số 927 - Trang 593-610 - 1976
The structure of β-lactamases
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
Tập 289 Số 1036 - Trang 321-331 - 1980
A memory system in the monkeyA neural model is presented, based largely on evidence from studies in monkeys, postulating that coded representations of stimuli are stored in the higher-order sensory (i.e. association) areas of the cortex whenever stimulus activation of these areas also triggers a cortico-limbo-thalamo-cortical circuit. This circuit, which could act as either an imprinting or rehearsal mechanism, may ac... ... hiện toàn bộ
Tập 298 Số 1089 - Trang 85-95 - 1982
A model of cardiac electrical activity incorporating ionic pumps and concentration changes
Equations have been developed to describe cardiac action potentials and pacemaker activity. The model takes account of extensive developments in experimental work since the formulation of the M.N.T. (R. E. McAllister, D. Noble and R. W. Tsien, J. Physiol., Lond. 251, 1-59 (1975)) and B.R. (G. W. Beeler and H. Reuter,
J. Physiol., Lond
... ... hiện toàn bộ
Tập 307 Số 1133 - Trang 353-398 - 1985
The structure of 2Zn pig insulin crystals at 1.5 Å resolutionThe paper describes the arrangement of the atoms within rhombohedral crystals of 2Zn pig insulin as seen in electron density maps calculated from X-ray data extending to 1.5 Å (1 Å = 10-10 m = 10-1 nm) at room temperature and refined toR = 0.153. The unit cell contains 2 zinc ions, 6 insulin molecules and about 3 x 283 water... ... hiện toàn bộ
Tập 319 Số 1195 - Trang 369-456 - 1988
The contribution of latent human failures to the breakdown of complex systemsSeveral recent accidents in complex high-risk technologies had their primary origins in a variety of delayed-action human failures committed long before an emergency state could be recognized. These disasters were due to the adverse conjunction of a large number of causal factors, each one necessary but singly insufficient to achieve the catastrophic outcome. Although the errors and violat... ... hiện toàn bộ
Tập 327 Số 1241 - Trang 475-484 - 1990