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951.
J. Unsworth Suzanne Y. Thomas Kaveri Chakrabarty 《Cellular and molecular life sciences : CMLS》1976,32(2):164-166
Summary Laser diffraction patterns from crayfish abdominal mechanoreceptors have been observed and the corresponding sarcomere lengths calculated and then correlated with sensory nerve discharge frequencies.Our thanks are due to the Australian Research Grants Committee for provision of the lasers and camera, to Dr.K. S. Imrie for the design of the interfacing cards, to ProfessorP. Mason and ProfessorR. E. Aitchison for their encouragement and advice, and toI. Paterson andC. March for constructing the equipement. 相似文献
952.
Summary The action on mitochondria of 3 peptide antibiotics, hypelcin-A, hypelcin-B, and alamethicin, was examined. The results showed that they are unique uncouplers of oxidative phosphorylation, with the same mechanism of action. 相似文献
953.
954.
T. Saito Y. Shibata T. Kurokawa N. Ishida 《Cellular and molecular life sciences : CMLS》1979,35(5):685-686
Summary The inhibitory effect of various purine derivatives on PHA-induced human lymphocyte blast formation was studied. Two nucleoside cytokinins, N6-benzyladenosine and N6-isopentenyladenosine, inhibited blast formation at concentrations as low as 10–6 M. However, the other cytokinins, which lacked the ribosyl residue at N9 position, had to be at the higher molar concentration of 10–4 before they could induce the same inhibitory effect. 相似文献
955.
Y. Yaeger I. Nathan A. Dvilansky N. Meyerstein 《Cellular and molecular life sciences : CMLS》1979,35(12):1673-1674
Summary The effect of copper ions on the permeation of glycerol and its mono-, di-, and triacetate derivatives was studied in fresh and stored erythrocytes. Permeability was unchanged with storage. Acylated glycerols permeate the cells mainly by non-facilitated mechanism, as their transport is almost unaffected by copper ions.Portions of this work were included in the graduate thesis of Dr. Yaeger in partial fulfillment of the requirements for the M. D. degree.Acknowledgement. We thank Mrs Dalia Mazor for expert technical assistance. 相似文献
956.
Summary The structure of a new linear C21 furanoterpene, furospongolide (1), obtained from the marine spongeDysidea herbacea, was determined by spectral means.We thank Professor J. Vacelet for the identification and Dr Loya and Mr Benayahu for the collection of the sponge. 相似文献
957.
E Turpin J Wantyghem Y Neel DGoussault 《Comptes rendus des séances de l'Académie des sciences. Série D, Sciences naturelles》1978,286(4):363-366
Glycoproteins of the lymphocyte surface are involved in many membrane mediated events. Their specific carbohydrate determinants might interact with lectins. Purification of macromolecules released from normal human lymphocytes by trypsin was performed using gel filtration and affinity properties for Ricinus sanguineus agglutinin. Some structural and biochemical characteristics are given. Relation to HLA determinants and surface immunoglobulins is discussed. 相似文献
958.
Summary In the wild type ofNeurospora crassa serine hydroxymethyltransferase occurs in the cytosol and mitochondria. The formate mutant (FGSC 9) lacks the cytosolic activity but has increased levels of isocitrate lyase and glyoxylate aminotransferase. Glycine is derived from glyoxylate in the mutant. 相似文献
959.
T. Hiramitsu Y. Majima Y. Hasegawa K. Hirata K. Yagi 《Cellular and molecular life sciences : CMLS》1976,32(10):1324-1325
Summary Insertion of iron nail into the vitreous cavity provoked the formation of lipoperoxide in the retina. In accord with the increase in lipoperoxide in the retina, ERG began to decrease. In vitro experiment using isolated retina, lipoperoxide was found to be increased in the presence of ferric or ferrous ions, while it was inhibited by adding antioxidants or ethylenediamine tetraacetate. From these results, direct cause of retinal degeneration in siderosis could be ascribed to the formation of lipoperoxide by iron-ions liberated from the piece of iron, resulting into the degeneration of the visual cell layers of the retina. 相似文献
960.
H V Van Kha Y Le Maho M Cagnard 《Comptes rendus des séances de l'Académie des sciences. Série D, Sciences naturelles》1979,289(13):955-958
In fed geese, plasma levels of glucose and alanine were 1.9 g.l-1 and 560 mumol.l-1, respectively. During a long fast (40 days), plasma glucose and alanine were maintained at a high level (1.5-1.8 g.l-1 and 370-540 mumol.l-1, respectively). Plasma level of acetoacetate was very low (40 mumol.l-1); by contrast, plasma level of beta hydroxybutyrate reached very high values (20 mmol.l-1) after about 20 days of fasting, then it decreased. Plasma levels of lactate and pyruvate decreased along the course of the fast, from 2 500 to 2 000 mumol.l-1 and 220 to 170 mumol.l-1, respectively. 相似文献