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  • 1970-1974  (14)
  • 1955-1959
  • 1945-1949
  • 1974  (14)
  • 1
    Electronic Resource
    Electronic Resource
    URINARY OESTRIOL EXCRETION IN TWIN PREGNANCIES (1974)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 81 (1974), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The results of 201 24-hour urinary oestriol estimations in 50 twin pregnancies are presented. The 10th, 50th and 90th centiles were approximately 1.7 times higher than those for singleton pregnancies, reflecting the combined weights of the two fetuses. In general, the oestriol values were not low before or after intrauterine death of one fetus or in pregnancies with intrauterine growth retardation. The trends in serial oestriol values were of more relevance in assessing fetal jeopardy than grading the values as normal or low.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1974.tb00543.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Notable diversity in peptide composition of murine H-2K and H-2D alloantigens (1974)
    s.l. : American Chemical Society
    Biochemistry 13 (1974), S. 3174-3178 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00712a027
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  • 3
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    Recognition assessed by rating and ranking (1974)
    London, etc. : Periodicals Archive Online (PAO)
    British journal of psychology. 65 (1974) 13 
    Details
    ISSN: 0007-1269
    Topics: Psychology
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:0047-1974-065-00-000003
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Iron-Stress Response in Tomato (Lycopersicon esculentum) 1. Sites of Fe Reduction, Absorption and Transport (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 31 (1974), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: T3238fer (Fe-inefficient) and T3238FER (Fe-efficient) tomato plants differ in their ability to utilize Fe and therefore can be used as test genotypes to locate sites of Fe uptake or to characterize changes that occur in roots in response to Fe stress (Fe deficiency). T3238fer does not respond to Fe stress. Release of hydrogen ions and reduction of Fe3+ to Fe2+ are two primary responses of T3238FER roots to Fe stress. Fe reduction sites were predominately in the young lateral roots, and between the regions of root elongation and maturation of the primary root. The use of BDPS (bathophenanthrolinedisulfonate) to trap Fe2+ did not affect the release of H+ ions or reduction by T3238FER roots. BPDS did not decrease Fe uptake until it exceeded the Fe concentration in the nutrient solution. A sevenfold increase in BPDS caused a threefold decrease in Fe taken up by the plant. Fe3+ is reduced to Fe2+ at root sites accessible to BPDS. Adding Zn decreased the response to Fe stress.Iron stress initiates the development of lateral roots, and we propose that most Fe enters the plant through these roots. The iron moves through protoxylem into the metaxylem of the primary root and then to the top of the plant as Fe citrate. Root environmental factors that are competitive or inhibit Fe-stress response, or genotypes that fail to respond to Fe stress, contribute to the development of Fe deficiency in plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1974.tb03695.x
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  • 5
    Electronic Resource
    Electronic Resource
    pH Changes Associated with Iron-Stress Response (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 30 (1974), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: When Fe-inefficient T3238fer and Fe-efficient T3238FER tomatoes were supplied iron, and nitrogen as nitrate, they increased the pH of the nutrient culture. When they were supplied nitrogen as ammonium, they decreased the pH. When Fe supply was limited, Fe-stress response developed in T3238FER that opposed the usual nitrate response and decreased, rather than increased, the pH. A “reductant” which reduced Fe3+ to Fe2+ was released from the roots of these plants and lowered the pH; and there was a tremendous increase in the uptake of Fe. T3238fer did not produce “reductant” in response to Fe-stress; the pH increased, and the plants developed Fe-deficiency when nitrogen was supplied as nitrate. Nitrogen nutrition and iron-stress response are important factors associated with iron chlorosis in plants. Release of hydrogen ions from roots of Fe-stressed plants is caused by more than response to imbalanced uptake of cations and anions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1974.tb05008.x
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  • 6
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure of the 2,4,7-trinitrofluorenone-hexamethylbenzene charge-transfer complex (1974)
    Springer
    Journal of chemical crystallography 4 (1974), S. 361-371 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal and molecular structure of the charge-transfer complex formed between 2,4,7-trinitrofluorenone and hexamethylbenzene has been determined by single-crystal X-ray diffraction techniques. The complex crystallizes with four charge-transfer pairs in a monoclinic cell (P21/c) of dimensionsa = 9.533(1),b = 14.944(2),c= 17.470(2) Å and β = 113.18(1) °. The structure was solved by direct methods. The orderly packing of donor and acceptor molecules in parallel crystalline planes made the determination a severe test of direct methods techniques. The 2294 statistically significant reflections were refined to a final value ofR = 0.063. Estimated standard deviations were 0.004 Å in bond distances and 0.5 ° in bond angles among the non-hydrogen atoms. The acceptor and donor molecules lie in alternate (212) planes with a separation of 3.25 Å between the planes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01220092
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Petrogenetic implications of argon isotopic evolution in the upper mantle (1974)
    [s.l.] : Nature Publishing Group
    Nature 250 (1974), S. 130-133 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The reported abundances of the argon isotopes in the terrestrial atmosphere4 at present are 40Ar, 99.600%; 38Ar, 0.063%; and 36Ar, 0.337%, giving an atmospheric 40Ar/36Ar ratio of 295.5. This anomalous situation is clearly related to the production of radiogenic 40Ar derived from the natural decay ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/250130a0
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Interpretation of Solar Hard X-ray Burst Polarisation Measurements (1974)
    [s.l.] : Nature Publishing Group
    Nature 247 (1974), S. 448-449 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Hard X-ray polarisation measurements have a key role to play in the formulation of flare theories since the degree and plane of polarisation indicate the velocity distribution of the bremsstrahlung source electrons-in particular, whether they stream along the flare field lines or are magnetically ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/247448a0
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Effectiveness of the intestinal polypeptides, IRP, GIP, VIP and motilin on insulin release in the rat (1974)
    Springer
    Diabetologia 10 (1974), S. 459-463 
    Details
    ISSN: 1432-0428
    Keywords: Intestinal hormones ; insulin release ; intestinal insulin releasing polypeptide (IRP) ; gastric inhibitory peptide (GIP) ; motilin ; vasoactive intestinal polypeptide (VIP) ; glucagon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Intestinal insulin releasing polypeptide (IRP) and Gastric inhibitory polypeptide (GIP) have a similar effect on intravenous glucose tolerance in the rat. Both augment the insulin response to intravenous glucose and increase the rate of glucose disappearance. VIP and motilin have no discernible effect. Plasma insulin dose-response curves to IRP and GIP are similar; both peptides stimulate insulin release in the presence of small blood glucose increments. A direct comparison of the insulin releasing potency of IRP and GIP is not possible as the former is not yet available in pure form.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01221638
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  • 10
    Electronic Resource
    Electronic Resource
    Internal root control of iron uptake and utilization in maize genotypes (1974)
    Springer
    Plant and soil 40 (1974), S. 669-677 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Studies were conducted to determine whether Fe uptake and transport in maize (Zea mays L.) is controlled inside or outside the root. Two maize genotypes exhibiting wide differences in Fe uptake and utilization were used. They were the Fe-efficient genotype WF9 and the Fe-inefficient genotype ys1/ys1. Iron-stressed WF9 produced higher amounts of H-ions and ‘reductant’ in nutrient solutions and reduced more Fe at the root surface than ys1/ys1. These properties were measured outside the root and they were associated with increased Fe uptake by WF9. When WF9 and ys1/ys1 were grown together in the same container, these properties did not benefit Fe uptake and utilization in ys1/ys1. Thus, we conclude, Fe-efficiency in WF9 and ys1/ys1 is controlled inside the root. re]19731029
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00010522
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