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  • 1975-1979  (18)
  • 1955-1959  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Electrical Conductance and Dielectric Constant of the Interior of Erythrocytes (1959)
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 333-334 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In 1912, Hober3 reported specific resistance values of the interior of beef erythrocytes between 160 and 600 ohm cm. Fricke and Morse4 gave for beef and sheep erythrocytes 310 ohm cm. and Fricke and Curtis5 later on for sheep, rabbit, chicken and turtle 140 ohm cm. Rajewsky and Schwan6 and Cook7 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/183333a0
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  • 2
    Electronic Resource
    Electronic Resource
    Partial specific volumes in highly concentrated protein solutions. I. Water-bovine serum albumin and water-bovine hemoglobin (1975)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 79 (1975), S. 584-590 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100573a010
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  • 3
    Electronic Resource
    Electronic Resource
    Atomare und molekulare Stoßprozesse und die Bestimmung zwischenmolekularer Wechselwirkungen (1978)
    Springer
    Naturwissenschaften 65 (1978), S. 297-306 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract Molecular beam-scattering experiments provide the most direct method for studying intermolecular interactions. The method and the experimental techniques are described and illustrated by some recent measurements on elastic and inelastic scattering cross sections. Examples of recent results are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00368370
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  • 4
    Electronic Resource
    Electronic Resource
    Population dose from natural radionuclides in phosphate fertilizers (1976)
    Springer
    Radiation and environmental biophysics 13 (1976), S. 247-261 
    Details
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Summary The natural radionuclide content of mineral phosphate fertilizers has been determined gammaspectrometrically. The investigations comprised ca. 70% of the mineral phosphate fertilizers authorized and used in the Federal Republic of Germany (FRG). At maximum, we found specific activities of 62 nCi Unat/kg, 23 nCi226Ra/kg, 1.6 nCi Thnat/kg and 262 nCi40K/kg. The mean values, weighted by the percentual agricultural consumption of the main phosphate fertilizer groups in 1973/74 and related to the phosphate content, amounted to 58, 40, 2, and 584 nCi/kg P2O5 for Unat,226Ra, Thnat, and40K respectively. This resulted in an annual distribution due to phosphate fertilizing of about 3.9 µCi Unat, 2.7 µCi226Ra, 0.1 µCi Thnat, and 39.9 µCi40K per ha of arable or pasture land in 1973/74 on the average. From these values the air dose rates over agricultural areas have been estimated under extreme conservative assumptions resulting in an additional external exposure of members of the population of 0.02 mrd/a on the average and 0.4 mrd/a in the region of highest phosphate fertilizing intensity. If it is assumed that radium contained in phosphate fertilizers were completely accumulated in the soils during the last 80 years, this value would be raised to 0.3 mrd/a on the average. The occupational external radiation exposure due to natural radionuclides contained in phosphate fertilizers was estimated to be 0.1 mrd/a on the average and 2.3 mrd/a at maximum for persons working in agriculture. These estimates show that natural radionuclides in phosphate fertilizers contribute but very little to the mean terrestrial radiation exposure of the population which is 50 to 55 mrd/a in Germany. Only for the small group of persons working in fertilizer production plants or storehouses a significant increase of the external radiation exposure has to be expected which could reach a doubling of the mean natural exposure value.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01330769
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  • 5
    Electronic Resource
    Electronic Resource
    Immediate x-radiation induced contractions of the isolated guinea pig terminal ileum: The localization of the effect by drugs (1977)
    Springer
    Radiation and environmental biophysics 14 (1977), S. 31-37 
    Details
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Summary Tone and motility of the isolated guinea pig ileum were increased by irradiation with a dose of 10 krd. The maximal effect corresponds to that induced by 0.001 µg/ml acetylcholine or 0.3 µg/ml nicotine. The pharmacological analysis of this effect performed with acetylcholine and nicotine and several blocking agents including hexamethonium, atropine, tetrodotoxin, diphenhydramine, and verapamil suggests that radiation acts on the postganglionic parasympathetic neuron and the neuromuscular synapse. The mechanism of radiation is likely to consist of both an increased release of acetylcholine from the postganglionic neuron and a sensibilization of the cholinergic receptor site at the smooth muscle cell. The latter effect is thought to result from an increased contractile action induced by acetylcholine or nicotine in the irradiated ileal smooth muscle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01331027
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  • 6
    Electronic Resource
    Electronic Resource
    Stochastic late effects after partial body irradiation in diagnostic radiology: Evaluation of approximate data (1978)
    Springer
    Radiation and environmental biophysics 15 (1978), S. 21-33 
    Details
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Summary The paper describes a method to estimate the risk of inducing a malignant disease by the highly nonuniform partial body X-irradiation as performed in diagnostic radiological examinations. The cumulative probability,p, for the development of a radiation-induced malignant neoplasm is obtained from the equationp =G t E s, whereE s is the energy imparted to the soft tissues of trunk and head during a special radiological procedure.G t is the mean integral incidence function for trunk and head, reflecting the cancer inducibility of organs and tissues in trunk and head,G t ≈ 0.3 kJ−1. The value ofG t was obtained from mortality risk factors for the different tissues at risk, adopted in ICRP Publication 26, 1977. The energy,E, imparted to the body in typical radiographic procedures is in the range of 1–30 mJ, going up to about 1 J in an extensive fluoroscopic examination of the gastrointestinal tract. The corresponding values forp are about 10−6 to 10−5, in extensive examinations 10−4. As to a radiograph of chest, the method described in this paper yields practically the same value forp as the Monte Carlo calculation, using the MIRD phantom and the relevant mortality risk factors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01330897
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  • 7
    Electronic Resource
    Electronic Resource
    Occupational dose from natural radionuclides in phosphate fertilizers (1979)
    Springer
    Radiation and environmental biophysics 16 (1979), S. 143-156 
    Details
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Summary In this investigation the occupational exposure of single persons due to the gamma radiation of the natural radionuclides in rock phosphates and phosphate fertilizers and their contribution to the population dose in the FRG has been determined. The exposure rates in the working fields production, transport, loading and storage of rock phosphates and phosphate fertilizers and due to their application in agriculture have been measured by means of scintillation dose rate meters or LiF-thermoluminescence dosemeters or have been estimated from specific activities. Mean additional exposure rates of 2–26 µR/h, with local maximum values up to 190 µR/h, were observed. From these values, together with statistical data for the number of occupied persons and annual working times in the various working fields, the mean and maximum annual dose of individuals and the contribution to the mean population dose have been estimated. The results show that a maximum annual dose to individuals from 0.4 mrem/y (agriculture) up to 45 mrem/y (production plants or storehouses) can occur. The corresponding mean annual doses are 0.05–20 mrem/y. The contribution of the occupational radiation exposure due to rock phosphates and phosphate fertilizers to the mean population dose is 174 man · rem/y related to whole body. To this, fertilizer production contributes 40 man · rem/y, transport and loading 45 man · rem/y, agricultural storehouses 31 man · rem/y, and agriculture 58 man · rem/y. Altogether, this investigation shows that an occupational radiation exposure of individuals may occur which corresponds to the mean terrestrial radiation exposure in the FRG. The contribution of the occupational collective doses due to phosphates to the population dose, however, is negligibly small.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01323222
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  • 8
    Electronic Resource
    Electronic Resource
    Zur Hemmung des Glukosestoffwechsels von Escherichia coli durch Röntgenstrahlen (1956)
    Springer
    Naturwissenschaften 43 (1956), S. 228-229 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600784
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  • 9
    Electronic Resource
    Electronic Resource
    Zum Kristallisationsverhalten des trans-1,5-Polypentenamers (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 1047-1052 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary The melting behaviour of isotropic trans-1,5-Polypentenamer was investigated in its dependence of the crosslinking density by means of DSC-measurements. At higher amounts of crosslinking agent large melting point depressions and decreases of the heat of melting were found. At the material crosslinked with dicumylperoxide we found in the rubber elastic domain at small deformations sharp changes in the slope of the force-temperature-curves, which indicates a transition. This transition is apparently favoured by the degree of crosslinking. Because the processes in this domain were found to be reversible, a thermodynamic analysis was made with the result of very small heats of transition. The possible nature of this transition is discussed. Material crosslinked with sulphur did not show this transition.
    Notes: Zusammenfassung Das Schmelzverhalten von isotropem trans-1,5-Polypentenamer wurde in Abhängigkeit vom Vernetzergehalt mit Hilfe von DSC-Messungen untersucht. Für höhere Vernetzerkonzentrationen wurden große Schmelzpunktdepressionen und Abnahme der Schmelzwärmen gefunden. Bei mit Dicumylperoxid vernetzten Proben zeigte sich im gummielastischen Bereich bei leicht deformierten Proben durch Knicke in den Kraft-Temperatur-Kurven eine Umwandlung an, die anscheinend durch den Vernetzungsgrad begünstigt wird. Da die Vorgänge in diesem Bereich reversibel sind, konnte eine thermodynamische Analyse durchgeführt werden, die sehr kleine Umwandlungswärmen ergab. Die mögliche Natur dieser Umwandlung wird diskutiert. Mit Schwefel vernetzte Proben zeigen ein normales Verhalten ohne Knicke in den Kraft-Temperatur-Kurven.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01602635
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  • 10
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    Unknown
    Differential Cross Sections for the Excitation of Single Rotational Quantum Transitions: HD + Ne (1977)
    American Physical Society
    Details
    Publication Date: 1977-03-28
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society
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