The Royal Society

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Non-cellulosic structural polysaccharides in algal cell walls - III. Mannan in siphoneous green algae
The Royal Society - Tập 169 Số 1015 - Trang 127-145 - 1968
Eva S. Frei, R. D. Preston
The cell walls of a number of green seaweeds, all members of the Codiaceae and the Dasy-cladaceae and includingCodiumandAcetabularia, are shown to containβ-1.4-linked mannan as the sole crystalline polysaccharide in the complete absence of cellulose. The X-ray diagram of the native mannan (almost identical wit...... hiện toàn bộ
Morphogenesis of human placental chorionic villi: cytoskeletal, syncytioskeletal and extracellular matrix proteins
The Royal Society - Tập 212 Số 1188 - Trang 305-316 - 1981
Colin Ockleford, Jennifer Wakely, R.A. Badley
Immunocytochemical and ultrastructural methods were used to investigate the distribution of a family of structural proteins in the human placenta near term. These reveal the distribution of cytoskeletal and ‘syncytioskeletal’ components that may account for some of the more obvious micromorphological features of placental structure. In the syncytiotrophoblast a potentially supporting struc...... hiện toàn bộ
The spandrels of San Marco and the Panglossian paradigm: a critique of the adaptationist programme
The Royal Society - Tập 205 Số 1161 - Trang 581-598 - 1979
Stephen Jay Gould, Richard C Lewontin
An adaptationist programme has dominated evolutionary thought in England and the United States during the past 40 years. It is based on faith in the power of natural selection as an optimizing agent. It proceeds by breaking an organism into unitary ‘traits’ and proposing an adaptive story for each considered separately. Trade-offs among competing selective demands exert the on...... hiện toàn bộ
A model for vein formation in higher plants
The Royal Society - Tập 207 Số 1166 - Trang 79-109 - 1980
Graeme Mitchison
Experiments on vein regeneration (Jost 1942; Jacobs 1952) suggest that a signal of some kind, which can cause the differentiation of veins, flows from a source in the growing tissues of leaves towards the root. Sachs (1969, 1978) has given evidence that the capacity of a given pathway to transport this signal increases with the flux it carries. He suggests that this progress could cause th...... hiện toàn bộ
The use of chemical potentials as indices of toxicity
The Royal Society - Tập 127 Số 848 - Trang 387-404 - 1939
John Ferguson
A number of investigation have been published in which attempts are made to correlate the chemical or physical properties of substances with the intensity of their toxic action. Among these may be instanced the work of Moore (1917) on the toxicity of fumigants towards insects, the extensive work of Tattersfield and his collaborators on contact insecticides and fumigants (Tattersfield and o...... hiện toàn bộ
Neural events underlying learning in insects: changes in pacemaker
The Royal Society - Tập 195 Số 1120 - Trang 395-415 - 1977
Marjorie H. Woollacott, Graham Hoyle
Computer-controlled operant-conditioning training procedures were used to raise (up-learning) or lower (down-learning) the mean frequency of discharge of the anterior adductor coxa motoneurone of the locust Schistocerca gregaria . Intracellular recordings were made from the soma of the motoneurone during training. The neurone ...... hiện toàn bộ
Propagation of electric activity in motor nerve terminals
The Royal Society - Tập 161 Số 985 - Trang 453-482 - 1965
Bernard Katz, Ricardo Miledi
External micro-electrodes were used to stimulate non-myelinated motor nerve terminals and to record pre- and post-synaptic responses at the neuromuscular junction of the frog. The synaptic terminals of the motor axon are electrically excitable. Antidromic nerve impulses can be set up by local stimulation of terminals along the greater part of their length. Presynaptic spikes c...... hiện toàn bộ
Electrophysiology and electron-microscopy of rat neuromuscular junctions after nerve degeneration
The Royal Society - Tập 169 Số 1016 - Trang 289-306 - 1968
Ricardo Miledi, Clarke R. Slater
(1) Intracellular micro-electrodes and electron-microscopy were used to study normal and denervated end-plates in rat diaphragm muscle fibres. (2) In normal muscles 84.5 to 100% of the micro-electrode insertions were sufficiently close to the neuromuscular junction to detect miniature end-plate potentials. The structure of the normal neuromuscular junction had the usual 3-cell arrangement:...... hiện toàn bộ
The projection from the lateral geniculate nucleus to the prestriate cortex of the macaque monkey
The Royal Society - Tập 213 Số 1190 - Trang 73-80 - 1981
Walter Fries
By injecting the enzyme horseradish peroxidase into the prestriate cortex of the macaque monkey and examining the lateral geniculate nucleus (l. g. n.) for retrograde label, the presence of a direct projection from the l. g. n. to prestriate visual cortex (Brodmann’s areas 18 and 19) was confirmed. Labelled cells occurred in all layers of the l. g. n., distributed in a roughly columnar fas...... hiện toàn bộ
The assembly of ionic currents in a thalamic neuron III. The seven-dimensional model
The Royal Society - Tập 237 Số 1288 - Trang 313-334 - 1989
R. M. Rose, J. L. Hindmarsh
We replace our earlier three-dimensional h a -model of a thalamic neuron (Rose & Hindmarsh, Proc. R. Soc. Lond. B 237, 289–312 (1989 b )) by a seven-dimensiona...... hiện toàn bộ
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