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  • Springer  (146,830)
  • Nature Publishing Group  (26,601)
  • Nature Publishing Group (NPG)
  • 1965-1969  (173,431)
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Year
  • 101
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    A Basic Biological Step? (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 775-777 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Because of shortcomings of nerve conduction theories in comparison with current views about electrode processes, a new model is suggested in terms of two or more different kinds of electrode reaction, which control the potentials across the cell ...
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  • 102
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    Stress and Design in Bivalved Mollusc Shell (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 777-779 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] An animal's shell is subjected to stress throughout its life, and residual stress can be released and measured as strain. The shape and texture of the shell are advantageous features of ...
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    URL: http://dx.doi.org/10.1038/224777a0
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  • 103
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    Fingerprints: A New Classification Scheme (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 779-780 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This system classifies fingerprint patterns in terms of deformations of a set of concentric circles, which can be characterized ...
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    URL: http://dx.doi.org/10.1038/224779a0
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  • 104
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    Estimate of the Gravitational Radiation from NP 0532 (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 781-782 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The rate at which rotational energy is lost via the rotating magnetic dipole mechanism has been shown to be5,6 PEM = -a dWR/dt=+2?/3c2 l4 H2pa2 sin2? (1) where PEM is the rate of energy loss via the magnetic dipole mechanism, Wn is the total rotational energy of the neutron star, and a is the ...
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  • 105
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    Possible Identification of the Diffuse Interstellar Absorption Band at 4430 Å (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 785-787 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Curves (a)-(d): spectra of SN-NGC-2713 showing interstellar absorption at 4430 A. Curve (e): average of (a)-(d). Curve (/): spectrum of -0-01 per cent Ca in C6H6 at 55 K. The image tube observations of Briick and Nandy7 show that the 4430 A band can be highly asymmetric and may in certain ...
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    URL: http://dx.doi.org/10.1038/224785a0
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  • 106
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    Biological Membranes behave as Non-porous Polymeric Sheets with Respect to the Diffusion of Non-electrolytes (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 240-243 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A model is put forward to describe the non-mediated transfer of non-electrolytes in terms of diffusion in homogeneous ...
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    URL: http://dx.doi.org/10.1038/224240a0
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  • 107
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    Possible Mechanism for the Acquisition of Spin-density by Cations in Ion-pairs involving Paramagnetic Anions (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 685-686 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This communication suggests that another mechanism for spin-transfer may often be important, and this can account equally well for negative values and for the trends in a(M+) with temperature and solvent which are often observed. The basis of this simple postulate is that the cation interaction can ...
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  • 108
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    Proton Hyperfine Coupling Constants in Radicals and the Excess Charge-effect (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 686-686 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. HYPERFINE PAHAMETERS (G) FOR VARIOUS RADICAL CATIONS AND ANIONS Anthra. Anthra. cene4 cene BH3. CH3 NH3+ NaH+ 9H 9H O.H 6.65 5.56 16.5 22.5 27 111.2 Zttt 1.032 0.97 0.901 1.00 1.063 1.024 Ref. 8 8 4 6 6 7 The Z.effective values were calculated from the experimental coupling ...
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  • 109
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    O—H … S Hydrogen Bond in Barium Thiosulphate Monohydrate (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 686-687 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have carried out a neutron diffraction study of barium thiosulphate monohydrate, BaSaO3.H2O, which crystallizes in the orthorhombic space group Pbcn, and possesses eight stoichiometric units in a unit cell of dimensions: a = 20.07± 0.01, 6.7.19 + 0.01 and c = 7.37± 0.01 Å. ...
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  • 110
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    Vibrational Relaxation of Nitric Oxide in Ternary Collisions (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 687-688 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Dependence of relaxation time on nitric oxide pressure; total pressure = 60 kNm2. Fig. 2. Relaxation of nitric oxide in bi. and termolecular collisions, O, C, N8; ?, Ar. The collision of two particles on an anisotropic potential is complicated by the rotational response to torque which, ...
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  • 111
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    Structure of Oxidized Polyacrylonitrile (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 688-689 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We believe that a structure intermediate between I and II corresponds most closely to the major component of the preoxidized fibre and have obtained evidence to substantiate this viewpoint. Multiple internal reflexion infrared analysis of a 99.6 per cent polyacrylonitrile fibre showed a strong ...
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  • 112
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    Production of Monodisperse Sub-micron Aerosols of which Each Particle carries a Specified Number of Electronic Charges (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 689-690 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Smoke filament passing between plates (no voltage on plates). Fig. 2. Deposition bands due to 0.73 m diameter polystyrene shpheres carrying (from right) 1, 2, 3, 4, and so on, electronic charges. Fig. 3. Photograph of ?Millipore? filter at end of box showing separated bands due to 2 m ...
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  • 113
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    Pulses in Iodide Concentration during the Periodic Decomposition of Hydrogen Peroxide (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 690-690 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] First, they are regular and, when [I?] and (dO2/dt) pulses both occur, they are invariably synchronous. Second, they have a characteristic shape, the slow decrease in [I-] between pulses gradually accelerating until the [I-] trace in Fig. 1 becomes almost vertical, whereupon [I-] rapidly reaches a ...
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  • 114
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    Light Induced Changes in the Conductivity of Thin Lipid Membranes in the Presence of Iodine and Iodide Ion (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 690-692 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. A, Voltage response in current clamp conditions of a thin lipid membrane in the presence of 0.1 M NaCl, 5 x 10-3 M phosphate buffer (pH 7), 0.01 M KI and approximately 2 x 10-5 M I2 to 10-8 s pulses of light at 3371 Å. The membrane resistance was 3 x 106 ? and sixteen pulses at the ...
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  • 115
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    Physical Studies of Phospholipid/Alamethicin Interactions (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 692-694 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Alamethicin is a cyclic polypeptide of slightly variable composition containing the amino-acids (GluN)2, (Glu)1, (Pro)2, (Gly)1, (Ala)2, (2-Methyl Ala)7 or 8, (Val)2, (Leu)1-. The amino-acid sequence has now been determined by B. S. Hartley and J. Payne (personal communication). The average ...
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  • 116
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    Crystal Data for a Bacterial Serine Protease (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 694-695 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] a-Lytic protease has a single histidine residue10, so proposals for a catalytic mechanism of the enzyme which involve two histidine residues such as those described for chymotrypsin A11,12 are clearly not applicable to ?-lytic protease. Furthermore, the kinetic studies of Kaplan and Whitaker13 have ...
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  • 117
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    Amino-acid Sequence of Ovine Lactogenic Hormone (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 695-696 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The preparation of tryptic and chymotryptic digests of native and performic acid oxidized prolactin has been described previously2. Peptide fragments from the digests were purified by combinations of various procedures including chromatography on ion-exchange resin, gel filtration on ?Sephadex? and ...
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  • 118
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    Changes of Immunoreactivity of Proinsulin induced by Rat Tissue Extracts (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 696-697 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] An extrapancreatic trypsin-like enzyme or enzyme system capable of converting proinsulin to insulin or an insulin-like molecule has therefore been postulated4,6. We describe here investigations carried out in vitro to establish the existence and location of this enzyme or enzyme system. The liver, ...
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  • 119
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    Long Acting Vasodilator Peptide from Lung Tissue (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 699-700 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We report here the occurrence in lung tissue from normal hogs of a vasoactive peptide having a prolonged systemic vasodilator effect outlasting that of bradykinin. The peptide, which is extractable in a relatively purified form, may take part in the chemical control of the pulmonary circulation and ...
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  • 120
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    Prolactin changes Cholesterol Stores in the Mouse Testis (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 700-701 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Mice used in the experiments were normal arid hypophysectomized males of Charles River CD-I strain and hereditary dwarf mice (dw/dw) (made available by Dr G. L. Wolff of the Institute for Cancer Research, Philadelphia), which were F1 from a cross of YS/ChWf-dw and Dw/Wf strains. Dwarf mice are ...
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  • 121
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    Secretion of Proinsulin C-Peptide by Pancreatic β Cells and its Circulation in Blood (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 697-699 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. After incubation with L-3H-leucine for the times indicated, islets (white columns) and medium (hatched columns) were extracted with acid alcohol and gel-filtered. The fractions comprising the insulin peak were combined, evaporated and subjected to polyacrylamide gel electrophoresis ...
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  • 122
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    Porosity of the Placenta to Maternal Cells in Normal Derived Mice (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 701-704 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Conventionally housed inbred CBA/T6T6 and CFW mice were bred to provide groups of both (CBA/T6T6 x CFW)F1 and (CFW x CBA/T6T6) F1 mice. These animals were investigated at various ages after treatment with 'Colcemid' before they were killed. Initially 0-2 ml. of 0-1 per cent solution of 'Colcemid' ...
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  • 123
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    Field Theory (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 291-291 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THIS book falls quite naturally into two almost equal parts, one dealing with Lagrangian field theory and the other with more axiomatic approaches, S-matrix theory and other modern trends. While this gives one a good overall view of the field, the penalty is the omission of such branches as ...
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  • 124
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    Oceanic Crusts (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 292-292 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] INTEREST in marine geology has increased enormously in the past ten years. Literature on this subject is not very extensive and this book is very timely. The book has been written primarily for those people who are not specialists in the subject so as to give them an insight into what geologists ...
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  • 125
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    Placental Barrier to Maternal Cells (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 704-706 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In three laboratories, inbred A2G and Balb/C, and colony-bred CFW albino mice were used as blastocyst donors, and the recipients were mature nulliparous CBA/H-T6T6 females mated with either a normal or a vasectomized male 2.5 or 3-5 days previously. The transplantation procedure was that described ...
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  • 126
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    Cylophosphamide Treatment of Gnotobiotic Mice congenitally infected with Lymphocytic Choriomeningitis Virus (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 707-709 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Cyclophosphamide (cytoxan) (CPA), a class of immuno-suppressive drugs, reduced the incidence of kidney lesions and increased the lifespan of (NZB-NZW)F1 mice after prolonged treatment5'6. It also reduced the production of antinuclear antibody and did not show a carcinogenic effect7. Because the ...
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  • 127
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    Mode of Enhancement of Self Stimulation in Rats by Methamphetamine (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 709-710 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Stein4 attempted to test these hypotheses of the central actions of the amphetamines using self stimulation in the rat. Small doses of amphetamines markedly enhanced low response rates. Because a-methyl tryptamine, a long acting "tryptamine receptor" stimulant, did not mimic this action, Stein ...
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  • 128
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    More Change at the Top (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 97-98 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ON the face of things, the changes in the machinery of the British Government decreed by the Prime Minister at the weekend are sensible, and even if there is a danger that the benefits may not be apparent before the next election, Mr Wilson himself is likely to be the chief loser if he has mistimed ...
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  • 129
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    Playing with Dice on Amchitka (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 98-99 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As Mr A. Gromyko and Mr W. Rogers skirmished with each other in New York about the possibility of strategic arms limitation talks?the result was a goalless draw?the pace of weapons development increased. Last week, at least four nuclear tests were conducted, three of them of more than passing ...
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  • 130
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    Educational TV for India (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 100-101 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SPACE officials tend to be carried away when they describe how money poured into what are called applications satellites is going to produce a better world for everyone; and they mean everyone, not just the inhabitants of technologically advanced countries. But these ornate words hide a host of ...
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  • 131
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    Science Policy: Dainton in Charge (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 101-102 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DR F. S. DAINTON, one of the founder members of the Council for Scientific Policy and well known for his report on the swing from the physical sciences to arts and the social sciences, is to become chairman of the council when Sir Harrie Massey retires at the end of the year. At present, Dr Dainton ...
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  • 132
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    Space Probes: Missing the Viking Bus (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 102-103 
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    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THERE seems to be a serious danger that British participation in the round of lunar and martian missions now being planned in the United States will be less than it might be. What seems to have happened is that the British summer holidays have played havoc with preparations. The flights immediately ...
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  • 133
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    Labour Party: From Brighton to Europe (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 103-104 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] TECHNOLOGY seems to be a dirty word in Brighton. Even the Common Market debate at the Labour Party Conference last week produced only one mention of technological cooperation. Mr Stanley Henig, MP for Lancaster, said in a speech welcoming "the determination of the Labour Government to negotiate ...
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    Populaton: Ford saves British Demography (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 103-103 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE 2 per cent annual growth of world population and the problems of urban living might seem to make demography a relevant, not to say urgent, subject of study, but British universities boast only a single department of demography between them, at the London School of Economics. And even that is ...
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    Pollution: Forging Ahead (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 104-104 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE Water Pollution Research Laboratory (WPRL) and the Warren Spring Laboratory seem to be contributing usefully to the work of monitoring and preventing pollution in all its forms, to judge from the open days held at Stevenage earlier this week. One of the new developments at the Warren Spring ...
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    Clinical Research: Appointments at Northwick Park (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 105-106 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MOST of the promises made by the North West Regional Hospital Board and the Medical Research Council about "Britain's Bethesda" (Nature,ZlS, 631; 1969) are, it seems, being kept. The first patients will be admitted in 1970; the cost has suffered only a modest inflation, from £13 million to ...
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    Gravitation: Too Much Torque (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 108-109 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE slightly quaint experimental techniques which for decades have been the arbiters of the third decimal place in the gravitational constant, known as "big G", seem at last to be nearing retirement. A new device, which seems capable of bypassing the problem of how to isolate a system of masses ...
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    Magnetosphere: Ahead of the Bow Shock (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 109-109 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ONE of the results of the space probes which travel out to ten earth radii or more has been a fairly careful mapping of the bow shock which precedes the Earth. Because the wind is hypersonic, low frequency waves cannot propagate against the stream, although whistler mode waves of high frequency can ...
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    Chemical Change: Photochemistry without Light (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 110-110 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT seems that a fairly general means of bringing about photosensitized chemical transformations which does not require an external source of radiant energy may have been discovered. The absorption by a molecule of a quantum of visible or ultraviolet light usually transforms that molecule into an ...
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    Palaeomagnetism: Ancient Secular Variation (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 111-111 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A SIGN that palaeomagnetism has come of age is that the foremost workers in the field are no longer content solely to investigate first order effects. Although there are many gaps in the record of palaeomagnetic directions, techniques have now advanced to the point where the scatter of directions ...
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    Space Biology: Regenerative Life Support (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 112-112 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MICROORGANISMS and microbiologists are impinging on the exploration of space in numerous ways. It is clear that the accompaniment of microbes on outward and homeward bound missions creates various hazards for astronauts and for the biology of the home planet. The whole question of quarantine ...
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    (+)-Abscisic Acid, the Growth Inhibitor induced in Detached Wheat Leaves by a Period of Wilting (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 719-720 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Wheat seedlings were grown in a 14 hour photoperiod (800 lumens foot2 from fluorescent tubes giving "natural daylight") at 22-5 C (night temperature 20 C). At the end of the tenth dark period, leaves (60 g) were excised 2 mm above the coleoptiles under a green "safe" light. Half of the leaves (that ...
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    Assimilation of Labelled Glucose from Seawater by Marine Nematodes (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 720-721 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Longitudinal section of P. vulgare, showing the labelling of the intestinal epithelium. Scale: 40 microns. Fig. 2. Longitudinal section of P. vulgare, showing the labelling of the hypodermal cords (arrows). Scale: 40 microns. Fig. 3. Transverse section of P. vulgare, showing the labelling ...
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    New Evidence for the Control Mechanism of Sclerotization in Insects (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 721-723 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I report that haemocytes of the cockroach Periplaneta americana (L), especially after ecdysis, contain the enzyme tyrosine decarboxylase. Haemocytes in blood bathed by the tanning hormone (that is 30 min after ecdysis) show a marked ability to convert tyrosine to tyramine (Figs. 1 and 2 and Table ...
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    Electron Microscopy: Cell with Tendrils (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 116-116 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This normal baby hamster kidney (BHK) cell is magnified about 3,300 times. The tendril-like processes are microvilli which appear at particular phases of the cell cycle, noticeably when the cell rounds up before division. The photograph, an electron micrograph of a carbon replica of the cell, was ...
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    Leaf Venation Patterns and the Origin of the Angiosperms (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 121-125 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Evolution of the angiosperm leaf is traced through venation patterns by comparing those of living plants from the countries which formed Gondwanaland with the fossil ...
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    Evidence for a Galactic Component of the Diffuse X-ray Background (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 134-137 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Rocket measurements have shown an excess of radiation in the galactic plane in the Vela–Carina–Centaurus region. This article presents the evidence and considers the possible ...
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    Possible Salt Domes in the Deep Atlantic off North-west Africa (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 141-143 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The presence of diapirs under the lower continental rise and abyssal plain off north-west Africa indicates that the salt basins of the continental margin may have extended seaward during the Late Triassic and Early Jurassic ...
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    Concept of Human Atherosclerosis (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 146-149 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Atherosclerotic patients have been classified in terms of the severity of the arterial lesions and correlations have been found with certain biochemical manifestations of the disease, with the blood group pattern, and with its prognosis. This has led to a new working concept of the ...
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    Nature of Pulsars (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 157-159 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I consider this second period to be a period of rotation. This notion arises in a natural way if we consider the most general motion of a symmetrical body free of external forces or torques. This is a motion of rotation arid precession of the rotation axis on a circular cone the orientation of ...
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    Generalization of the Lorentz Transformation (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 155-156 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Lorentz transformation has been derived1 from the assumptions of (1) inertial frame equivalence, (2) linearity, and (3) isotropic behaviour of clocks. As shown by Pars, a limiting and invariant speed c arises from these assumptions. There is no need to add the existence of such a speed to the ...
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    Magnetic Field Decay in a Neutron Star and the Distribution of Pulsar Periods (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 160-160 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Two basic ingredients seem to be required to produce a pulsar and an output of relativistic particles in the surroundings of a neutron star, namely stellar rotation and strong magnetic fields (H= 1010?1013 G). I do not intend to comment here on the different aspects of this problem, but the basic ...
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    Mascons, Marid and Sinuous Rilles—A Postulated Igneous Origin (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 164-164 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Five of the mascons underlie mare areas where sinuous rilles are prevalent (Imbrium, Serenitatis, Humorum, Aestuum-Medii and Orient ale). This, plus their concentration on the Moon's near side, suggests a common igneous origin. Impact mare-mascons would be randomly distributed unless they occurred ...
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    Lanthanides in the Silicate Inclusion of the Woodbine Meteorite (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 164-165 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Chondrite-normalized lanthanide pattern of the silicate inclusion in the Woodbine iron meteorite; the broken line shows a possible pattern for the lost counterpart, according to the second interpretation. Silicate inclusion material weighing 235 nig was analysed for lanthanides, and their ...
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    Stress intensity Factors calculated generally by the Finite Element Technique (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 166-167 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig.1. Crack in a body of arbitrary shape. Fig. 2. Finite element idealization for centre-crack specimen. Fig. 3. Variation of stress intensity factor with crack length/sheet width. O, Finite element; ? Isida x = 1+Eazr (2a/w)2r/r = 1; Irwin X = [(w/a) tan (na/w]1/2 It has been shown3 that ...
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    Higher Education: Talks on Universities (Part 2) (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1045-1046 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE second instalment in the talks at the Department of Education and Science on university expansion in the 1970s took place last week. This time it was the turn of the Association of University Teachers to meet the chairman of the University Grants Committee, Mr Kenneth Berrill, and the Minister ...
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    Conservation: Plans for Europe (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1047-1048 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] CONFERENCES, competitions, special postage stamps, film festivals, a youth parliament and Viking beacons will be some of the features of European Conservation Year, to be launched in the United Kingdom in the traditional way with a dinner at the Guildhall, London, on December 16. Twenty-five ...
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    Science Policy: Three Busy Years (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1050-1050 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE Science Policy Research Unit at the University of Sussex is making its presence felt in science policy. The unit's third report, now published, shows that in addition to research in industrial innovation, science policy in developing countries and social studies of science, members of the ...
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    Rabies: Animals Held Up (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1049-1049 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] EIGHT months' quarantine is now to be required for dogs and cats entering Britain. Mr Cledwyn Hughes, Minister of Agriculture, Fisheries and Food, has also announced the prohibition of imports of "exotic species" ranging from aye-ayes to wolverines unless destined for zoos or research ...
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    Oceanology: All at Sea (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1049-1050 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MUCH of what at present passes for oceanology is nothing more than the straightforward use of the sea for such things as fishing and transport, so that it is inevitable that oceanology should seem as if it is trying to breathe life into dying horses or to flog healthy animals into a frenzy. Now ...
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    Steel Industry: Computer on the March (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1051-1051 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE mobile computer ordered by the British Steel Corporation's BISRA laboratories for studying process control in the steel industry went through its first trials last week on a miniature rolling mill in London. In January the computer unit will move to the Spencer steelworks in South Wales for ...
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    Environment: Keep Britain Green (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1052-1052 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] POLLUTION studies will no doubt attract the greatest share of interest in the report of the Monks Wood Experimental Station for 1966-68 (Nature Conservancy, 10s). Monks Wood has taken a lead this year in looking for suspect chemicals among the dead sea-birds from the Irish Sea, and the report ...
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    Abrogation of Cellular Immunity to Antigenically Foreign Mouse Embryonic Cells by a Serum Factor (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 914-915 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Lymphocytes from tumour-bearing animals are capable of inhibiting the growth of neoplastic cells from the same animals in vitro1*'15, and sera from the tumour-bearing animals often contain antibodies which can bind specifically to the tumour cells and block the lymphocyte effect16. If a similar ...
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    Glutamic Acid Decarboxylase and Gamma-aminobutyric Acid in Mammalian Kidney (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 916-917 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Homogenates of brain and kidney from several mammalian species and of rat liver and spleen were prepared in ice-cold potassium phosphate buffer (0-026 M, #〉H 6*8) with a Potter-Elvehjem glass homogenizer. Aliquots were deproteinized with 1 per cent picric acid (w/v) or 3 per cent ...
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    Cross-modal Transfer of Intensity Discrimination by Rats (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 918-919 
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    Notes: [Auszug] We have investigated whether rats trained to discriminate between high and low auditory (or visual) intensities later find it easier to learn a visual (or auditory) intensity discrimination when the positive stimuli in both problems were of the same intensity (both high or both low) than when one ...
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    Anodic Oxidation of Carbohydrates and their Derivatives in Neutral Saline Solution (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 921-922 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The work reported here is a continuation of studies2 on the anodic oxidation of glucose and related carbohydrates at platinized electrodes, with the object of obtaining small amounts of usable power to drive the blocking oscillator circuit of a cardiac pacemaker. The ultimate form of such a fuel ...
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    General Problem Solving? (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 923-924 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE subject of this book is a series of computer programs, successive incarnations of Newell, Shaw and Simon's1 "General Problem Solver". The goal of GPS is difficult to define because it has never kept still. The authors' motivation "alternates"?to use their own term?between the desire to throw ...
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    Regulating the Payments (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 924-924 
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    Notes: [Auszug] MR BRITTAN has written a very readable account of official attempts to manage the economy. A useful discussion of the machinery of economic management is followed by a blow-by-blow account of policy since the war, while the final section of the book attempts to assess the results and offers some ...
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    Invisible Rays (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 925-926 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the course of Sir William Herschel's observations of the Sun in 1800, he was plagued by the fact that the filters he used to protect his eyes often cracked. His investigations into the best type of filter led to his discovery of infrared radiation and to his prophetic statement, "It may be ...
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    Superconductors (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 926-926 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ALTHOUGH type II superconductors were first investigated in 1937, it was not until their usefulness in producing high magnetic fields was realized in 1961 that their properties were thoroughly and systematically studied. The later realization that the 1957 theory of Abrikosov was relevant was a ...
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    Muddled Migration (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 927-927 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THERE have been so many popular books in this field that another could only be justified if it brought a new clarity of exposition, or at least a new approach. This book does neither. What would the intelligent layman make of the sentence, "He showed that an astronomical point, envisaged by a ...
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    Evolution of Agriculture (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 927-928 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN addition to its preface, an introduction in two parts, and a conclusion, this volume contains forty-seven articles by forty-five authors. These vary in length from four to twenty-eight pages and in quality from slightly sophomoric to scholarly and distinguished. The editors have, with some ...
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    Origins Of Today's Cuisine (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 928-928 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FOOD is an agreeable subject to us all, and in this agreeable book Dr and Mrs Brothwell remind us that our ancestors, especially the Romans, were more adventurous and more ingenious in its preparation than ourselves. Fig. 16, for instance, illustrates a special container with holes and internal ...
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    Cell Transformation by Polyoma Virus and SV40 (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1069-1071 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Heritable alterations in cell growth after infection by viruses usually lead to malignancy, and consequently are attracting a great deal of attention. This review brings the story up to date and poses some questions for the ...
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    No Peace for the Wicked (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 929-930 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-Many biologists must disagree with the over-optimistic attitude of the editorial "No peace for the wicked" (Nature, 224, 629; 1969). In particular, it is difficult to understand how anyone with a knowledge of the figures can say that population increase is unlikely to be a social disaster. At ...
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    Cyclamates (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 930-930 
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    Notes: [Auszug] SIR,-In the leading article in Nature (224, 298; 1969), we find the somewhat startling statement that the induction of chromosome breakage in leucocytes by cyclamates, though "ominous", is ". . . meaningless, because no one yet knows what harm, if any, damaged leucocyte chromosomes do". It may be ...
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    Corrigendum (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 931-931 
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    Notes: [Auszug] In the article "Observations on the Hydraulics of Ascidia" by I. Goodbody and E. R. Trueman (Nature, 224, 85; 1969), line 18 in the sixth paragraph, "the mantle, the left side adjacent to the branchial sac" should read "the mantle, the right side adjacent to the branchial ...
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    British Diary (1969)
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    Nature 224 (1969), S. 931-932 
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    Notes: [Auszug] Monday, December I Anniversary Meeting (2. 30 p. m.) Royal Society, at 6 Carlton House Terrace, London SW1. Development on Concorde (7 p. m.) Mr H. Hill, Institution of Electrical Engineers, at the Royal Star, Maidstone, Kent. Education and Careers in the Rubber Industry (8 p. m.) Institution ...
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    Reports and Publications (1969)
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    Nature 224 (1969), S. 932-932 
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    Notes: [Auszug] (not included in the monthly Books Supplement) Great Britain and Ireland Organization of Maintenance. (ISE Publication 118.) Pp.109. (London: The Iron and Steel Institute, 1969.) 80s. [229 Communications of the Dublin Institute for Advanced Studies, Series C. Vol. 1, No. 5: Reduced Counts of ...
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    Shotgun Marriage in Civil Aviation (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 738-738 
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    Notes: [Auszug] PROPOSALS announced last week by the government (HMSO, Cmnd 4213, 3s 6rf) for the future of civil aviation may well lead to the sensible and long overdue merger between BEA and BOAC. The intention is gradually to remove the individuality of the two companies by making them jointly responsible to an ...
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    Origin of the Term Ionosphere (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1096-1096 
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    Notes: [Auszug] The letter, a file copy, was discovered during building alterations at the Radio and Space Research Station, Slough; it is addressed to the secretary, Radio Research Board, and, referring to discussions on the nomenclature of the "upper conduction layer", advocates the use of the term in the ...
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    Sodium Distribution in the Terrestrial Upper Atmosphere (1969)
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    Nature 224 (1969), S. 1097-1097 
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    Notes: [Auszug] These observations have led Donahue4 and Hunten and Wallace1 to suggest that the chemical theory alone is not adequate. The chemical theory, as developed, for example, by Blamont and Donahue5, predicts the sodium abundance to be determined by a balance between the oxidation reaction and the ...
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    Measurements Separating the Gaseous and Aerosol Components of Laser Atmospheric Backscatter (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1098-1099 
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    Notes: [Auszug] Observations of the frequency shifted (Raman component) of laser atmospheric backscatter off the vibrational levels of N2 have already been reported1. By preferentially rejecting the backscatter return at 6943 in the vicinity of the Rayleigh line, the return of the Raman component from N2 due to ...
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    Cosmology and Quantum Electrodynamics (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1102-1102 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The following is a brief outline of the $-matrix approach. The conventional perturbation expansion is modified in accordance with a suggestion made by Feynman7. The first term in the new expansion is examined. Contributions from all particles in the universe are included without reference to ...
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    Wet Bulb Equilibrium in a Finite Process (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1103-1104 
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    Notes: [Auszug] Another surface, the ^-surface, close to the interface but on the air side, is not adiabatic. Application of the energy and mass equations to a similar control space bounded by the t-surface gives dh' c^tt-t) ?? = X -------------- + hg,i dx xi ? x (2) where t is the temperature of the bulk air ...
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    Helicoidal Structure of Paramyosin (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1105-1107 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Very suggestive information comes from electron microscopy. Fig. 1 shows a paramyosin filament which unfolds into a much wider thin ribbon. We infer that the filament is composed of material rolled up in thin layers. Fig. 3a shows the characteristic geometry of the paramyosin net as revealed by ...
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    Circular Dichroism of Long Wavelength Forms of Chlorophyll a (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1108-1110 
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    Notes: [Auszug] The interaction of Chi with dioxane in Nujol films, Nujol suspensions or hexane suspensions produces aggregates with visible absorption maxima at 674 nm, 683?684 nm, 689 nm and 696?700 nm. When the 696?700 nm form is present, intense rotatory strength is observed with band splitting. When a small ...
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    Capacitation of Hamster Spermatozoa by Bovine Follicular Fluid (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1111-1112 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We report here the capacitation of some sperm by incubation in tissue culture medium alone and a marked increase in the proportion of sperm capacitated when they were incubated in heated bovine follicular fluid devoid of cellular contents. The proportion of sperm capacitated does not seem to be ...
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    Experimental Model for Studying the Effect of Electric Current on Bone in vivo (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1112-1113 
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    Notes: [Auszug] To correlate this biophysical phenomenon with physiological processes, many have tried to study the effects of electric current on bone in vivo. Bassett, Pawluk and Becker5 reported massive osteo-genesis at the cathode of a silicone-encapsulated battery-resistor pack with iridium-platinum ...
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    Effect of Alginate on the Absorption and Excretion of 203 Pb in Rats fed Milk and Normal Diets (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1115-1115 
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    Notes: [Auszug] Hodgkinson et al.5 have reported a significant reduction in the apparent absorption of Ca, Mg, Zn, Cu and Fe in man and feel that dietary supplements of these elements might be necessary during prolonged alginate therapy. Carr and Harrison et al.Q, however, report no effect on the absorption of Na, ...
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    Rheological Simulation of Synovial Fluid by a Synthetic Polymer Solution (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1118-1119 
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    Notes: [Auszug] A Weissenberg rheogoniometer type R16 was used to carry out the flow measurements4. The polymer chosen initially for this work was poly vinyl pyrrolidone (PVP) (I). This is water soluble and protein-like, in that it is a long chain molecule containing repeating amide groups. It is, furthermore, ...
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    Non-injurious Ultrasonic Technique for observing Flow in the Human Aorta (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1119-1121 
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    Notes: [Auszug] A technique developed here shows promise of largely fulfilling this requirement in man: using the Doppler ultrasonic blood velocity measurement principle3,4, it allows the instantaneous blood velocity/time pattern in the ascending aorta to be observed through the intact chest wall. Although other ...
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    Microorganisms, Alive and imprisoned in a Polymer Cage (1969)
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    Nature 224 (1969), S. 1122-1123 
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    Notes: [Auszug] We used the protozoan Tetrahymena pyriformis and the bacterium Escherichia coli as representative examples of microorganisms. T. pyriformis were cultured at 25 C for two days, with shaking, in 500 ml. of a growth medium of 2 per cent proteose peptone and 0-1 per cent yeast extract, and the E. coli ...
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    Velocity of Gravitational Waves (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 782-783 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Developments3 in the magnetic suspension of rotating masses in a vacuum now make possible the measurement of this small force. Such a measurement will be analogous to measurements of the magnetic system of units in the electromagnetic system, which gave the velocity of electromagnetic waves from ...
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    OH Emission and the Infrared Star in VY Canis Majoris (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 783-784 
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    Notes: [Auszug] One of these infrared objects, VY CMa, the existence of which was first pointed out by Neugebauer and Leigh-ton2, has recently been observed at 1,612 MHz and found to radiate the typical OH line emission3. We have now measured the line emission from VY CMa in all four OH lines and find that it is a ...
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    Retinal Images from Distant Objects: the Premises for an Interpretation (reply) (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1130-1130 
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    Notes: [Auszug] DR G. H. FISHER, who had the opportunity of seeing the preceding letter before publication, has sent this reply to the criticisms it contains: Several perceptual phenomena including size and shape constancy, geometrical illusions and figural after-effects reveal appreciable differences between the ...
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    Rare Malignancy (1969)
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    Nature 224 (1969), S. 1133-1133 
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    Notes: [Auszug] THIS monograph is a useful addition to the literature on choriocarcinoma and is probably the most complete review of the subject and its literature yet published. The author, who has had the valuable experience of building up a special unit for the study of this relatively rare disease, is well ...
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    Computer Board: To Pay or Not to Pay (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 302-302 
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    Notes: [Auszug] AN appeal for a clearer realization by university research workers of the costs of their computing facilities was made by Professor Sir Brian Flowers, chairman of the Computer Board, at the opening of the new computer centre at King's College, London, last week. He said that the controversial ...
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    Glass Technology: Making and Breaking (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 302-303 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE way in which glassware can be damaged in a domestic dish-washing machine is one of the investigations at the British Glass Industry Research Association described in its latest annual report, now published. A review of the year's activities by the director of research, Dr R. G. Newton, points ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/224302b0
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    Electronic Resource
    Heat Flow: New Terrestrial Analysis (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 308-308 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SINCE the last spherical harmonic analysis of terrestrial heat flow was made in 1965, the number of observations has almost trebledfrom 1,162 to 2,934. A new analysis was thus clearly called for, if only to check the conclusions reached in 1965. Horai and Simmons (Earth Planet. Sci. Lett., 6, 386; ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/224308a0
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