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  • 1965-1969  (10)
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Erscheinungszeitraum
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  • 1
    Digitale Medien
    Digitale Medien
    Eczema vaccinatum treated with N-methylisatin β-thiosemicarbazone. (1965)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 77 (1965), S. 0 
    Details
    ISSN: 1365-2133
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2133.1965.tb14584.x
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  • 2
    Digitale Medien
    Digitale Medien
    On the feeding and behaviour of the larva of Branchiostoma lanceolatum (1969)
    Springer
    Marine biology 3 (1969), S. 58-72 
    Details
    ISSN: 1432-1793
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Collections of Branchiostoma lanceolatum (Pallas) made in mid-May and mid-July at Helgoland before and after spawning have established that the larvae leave the amphioxus ground about June and therefore presumably become planktonic. Metamorphosing larvae and young adults can be collected on the ground in late August and early September and are either the same larvae returning, or others from a neighbouring ground within the same circulating current system. An examination of the gut contents of 67 larvae collected from the plankton at Helgoland in August showed that 30% of the animals had ingested calanoid copepods or other organic material of a size similar to that of the larval mouth. A few larvae had also taken small particles evidently by a ciliary mechanism. In 50% of the larvae the gut was empty. It has been found that, in addition to a muscular mouth and gill bars richly supplied with nerves, both the gut wall and the body wall are muscular and capable of passing, by peristalsis, large food masses that distend the body. The visceral muscles of the larva resemble the coelomyarian fibres of the Nematoda. The larva appears, therefore, to be both microphagous and macrophagous. Evidence from the swimming behaviour and from reports of the vertical distribution of larvae in the sea is discussed. It is suggested that the larvae normally swim upward with the mouth and gills closed and then sink passively in the horizontal position with the pharynx expanded and the open mouth directed downward. In the event of large organism such as a copepod or a mass of organic material coming into contact with the adhesive lower left surface of the larva, it could be captured by the mobile lower lip and engulfed. The straightening of the larval tail, the great increase in the number of eyecups and the growth of the metapleura at metamorphosis are suggested as factors leading to the settlement of the young adult. Attention is drawn to the possible significance of the structure of the larva in interpreting the relationships of the cephalochordates.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00355593
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  • 3
    Digitale Medien
    Digitale Medien
    A Leray-Schauder theorem for a class of nonlinear operators (1969)
    Springer
    Mathematische Annalen 182 (1969), S. 207-212 
    Details
    ISSN: 1432-1807
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01350323
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  • 4
    facet.materialart.
    Unbekannt
    The relation of verbal rate to syllable length of verbal action in two interview situations (1967)
    London, etc. : Periodicals Archive Online (PAO)
    British journal of psychology. 58 (1967) 283 
    Details
    ISSN: 0007-1269
    Thema: Psychologie
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:0047-1967-058-00-000035
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  • 5
    Digitale Medien
    Digitale Medien
    Geochemical Reconnaisance and Hypocuprosis (1968)
    [s.l.] : Nature Publishing Group
    Nature 217 (1968), S. 1010-1012 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Regional geochemical reconnaissance in the Southern Pennines can aid the detecting and mapping of the incidence of hypocuprosis—a trace element disorder of agricultural ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/2171010a0
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  • 6
    Digitale Medien
    Digitale Medien
    Acceleration of Rate of the Early Chick Embryo Heart by Visible Light (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1014-1016 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Hearts were dissected from 2-5 day chick embryos and freely suspended in a phosphate-buffered medium at 37? C. The medium contained (in grams per cent): sodium chloride, 0.8; potassium chloride, 0.02; sodium monohydrogen phosphate, 0.115; potassium dihydrogen phosphate, 0.02; calcium chloride, ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/2141014a0
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  • 7
    Digitale Medien
    Digitale Medien
    Irrigation of Submerged Marine Sands through Wave Action (1968)
    [s.l.] : Nature Publishing Group
    Nature 220 (1968), S. 682-683 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Table 1. APPROXIMATE GRAIN SIZE DISTRIBUTION OF LE RACOU SAND AT 3 M Diameter of grains (mm) Per cent by dry weight 2-55-1-66 2-0 1-66-1-16 14-0 1-16-0-76 73-0 0-76-0-50 9-0 〈0-50 2-0 Tests at the seabed were made by one of us (J. T.) using an aqualung. Seawater at the same temperature as ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/220682a0
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  • 8
    Digitale Medien
    Digitale Medien
    Effect of nicotine on the transmembrane potential and contractility of isolated rat atria (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 236-237 
    Details
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Zusammenfassung Die Wirkungen von Nikotin auf die Kontraktilität und die Membranpotentiale des Rattenatriums wurden untersucht. Nikotin (5 × 10−4 M) erhöhte gleichzeitig die entwickelte Spannung sowie die Dauer und Fläche des Aktionspotentials. Ein möglicher Zusammenhang dieser Änderungen mit der erhöhten Kontraktilität wird diskutiert.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02152789
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  • 9
    Digitale Medien
    Digitale Medien
    On the role of acetylcholine in regulating the rate of the early chick embryo heartSupported by National Science Foundation grants G-15853 and GB-1064. (1965)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 66 (1965), S. 267-272 
    Details
    ISSN: 0095-9898
    Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Medizin
    Notizen: A study has been made of the effect of acetylcholine upon the heart rate of the early chick embryo, and it has been noted that under certain experimental conditions acetylcholine stimulates the heart rate during the period of vagal innervation, while depressing the heart rate after the nerve supply is established. Isolated chick embryo hearts freely suspended in a phosphate-buffered (bicarbonate-free) medium beat at only about one-third their in ovo rates, and acetylcholine produces biphasic effects of stimulation and inhibition of the heart rate depending upon the concentration of the drug and the age of the hearts, the maximal stimulation occurring at five days. When suspended in Krebs bicarbonate medium the hearts beat at rates of about 72 to 74% their in ovo rates, and acetylcholine produces only slowing of the heart rate. This effect of acetylcholine can be diminished or reversed when an inhibitor of endogenous acetylcholine, hemicholinium-3 is added. We have postulated that both inhibitory and stimulatory receptors for acetylcholine exist in the early chick embryo heart and that the response to added acetylcholine depends in part on levels of endogenous acetylcholine already present in the heart. The role of endogenous acetylcholine in regulating heart rate is discussed.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jcp.1030660303
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  • 10
    Digitale Medien
    Digitale Medien
    Modification of receptors for acetylcholine in the early embryonic heartSupported by National Science Foundation grants G-15853 and GB-1064. (1965)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 66 (1965), S. 273-279 
    Details
    ISSN: 0095-9898
    Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Medizin
    Notizen: Whole chick embryo blastoderms at zero- to 7-somites have been explanted onto a nutrient medium and incubated at 37°C for 20 hours, in order to develop to 18- to 19-somites, when the heart rate is depressed by acetylcholine and even more strongly by a number of parasympathomimetic drugs and cholinesterase inhibitors. Hence we have concluded that receptors for acetylcholine are present in the early chick embryo heart before innervation by the vagus nerve is initiated, but that the receptors do not possess the specificity of adult acetylcholine cardiac receptors. Incubation of the zero- to 7-somite blastoderms on media containing certain of the parasympathomimetic drugs and cholinesterase inhibitors greatly increased the sensitivity of the hearts to depression of rate by acetylcholine at 18- to 19-somites, and we have concluded that development of acetylcholine receptors has been stimulated by the drugs. A possible stereochemical relationship between acetylcholine receptors and drugs that are able to stimulate the development of the receptors is postulated.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jcp.1030660304
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