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2,916 Result(s)
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Synthesis of L-Methionyl-L-Glutamyl-L-Histidyl-L-Phenylalanyl-L-Arginyl-L-Tryptophyl-Glycine and its Melanocyte-stimulating and Corticotropin-releasing Activity
THE occurrence of the heptapeptide, L-methionyl-L-glutamyl-L-histidyl- L-phenylalanyl-L-arginyl-L-tryptophyl-glycine, in both adrenocorticotropins (ACTH) and melanotropins (MSH)1–3 has led to synthesis of various...
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Use of Tetrazolium Compounds in Oxidative Enzyme Histo- and Cyto- chemistry
A NEW tetrazolium salt previously synthesized has been evaluated for its ability to overcome the technical and theoretical barriers of either the MTT-Co (ref. 1) or nitro-BT methods2,3. This compound is TNBT or 2...
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Demonstration of the Sjöstrand Membrane Particles by an Electron Cytochemical Method
RECENTLY, several reports1–3 have appeared which convincingly demonstrate that certain membrane systems of the cell are composed of a sub-unit structure somewhat out of accord with the classical triple-layered un...
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Enzymatic Synthesis of Cyclo propane Fatty Aldehydes
FATTY aldehydes containing a cyclopropane ring have been isolated after acid methanolysis of the phospholipids obtained from Clostridium butyricum. 36 per cent by weight of the fatty aldehydes contained a cyclopr...
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Isolation and Amino-acid Sequence of β-LPH from Sheep Pituitary Glands
SEVERAL adenohypophyseal hormones have been demonstrated to possess in vitro lipotropic activity; these include growth, adrenocorticotropic, thyrotropic, α-melanocyte-stimulating and β-melanocyte-stimulating horm...
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Antibacterial Nature of Prostatic Fluid
Human and canine prostatic fluid is bactericidal for a number of Gram negative and Gram positive bacteria. The fraction responsible for this effect is heat stable, of low molecular weight and is inactivated by...
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Moving Particles in Intact Sieve Tubes of Heracleum mantegazzianum
RECENTLY reports have been published of microscopic particles moving along strands in the sieve tubes of cut sections of Primula obconica1,2. This movement has suggested that protoplasmic streaming may be the mec...
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Transplantation of Radiation-induced Canine Myelomonocytic Leukaemia
AN important variant of leukaemia in man is the myelomonocytic form1, the exact nature of which is still unclear, for the only available model for studies of this disease is the mouse2. We have developed a canine...
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Effects of 6-Hydroxydopamine on Sleep in the Rat
THERE is evidence that biogenic amines are involved in the mechanisms of sleep1,2. Although the exact relationship is not clear, recent results suggest that decreases in the concen-tration of catecholamines (nora...
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Isolation of a New Cardiotoxic Protein from the Edible Mushroom, Volvariella volvacea
THE cyclic toxic peptides, phalloidins and amanitins, have been isolated from Amanita phalloides; they caused violent emesis and diarrhoea or even death 10 to 24 h after ingestion1,2. Their chemical structures ha...
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Structure of the cerebellum
Cerebellar Cortex: Cytology and Organisation.
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An electrophysiological study of the hippocampus of the ‘reeler’ mutant mouse
THE laminar organisation of neurones in the brain of the homozygous ‘reeler’ mutant mouse1 is grossly disrupted, especially in the cerebellum, hippocampus and neocortex2–6. Although a number of histological studi...
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Cardiotoxic protein from edible mushrooms
THE cardiotoxic protein volvatoxin has been isolated from the edible mushroom, Volvariella volvaceae1. We have now isolated another cardiotoxic protein from the edible mushroom Flammulina velutipes (Curt. ex Frie...
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Denervation and re-innervation
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Analysis of membrane noise
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Convergence of information in thermal pathways
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Synaptic remodelling in the mutant cerebellum
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Organisation of the mammalian tectum
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Polarity of structure and of ordered nerve connections in the develo** amphibian brain
Tectal polarity for retinal connections remains reversible long after the anatomical pattern of neural structures has been determined. Cells in the diencephalon seem to control this polarity. Following certain...
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Plasticity of the nervous system