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  • 1
    Electronic Resource
    Electronic Resource
    Koordinatentransformationen zur Behandlung von Mehrphasensystemen (1974)
    Springer
    Electrical engineering 56 (1974), S. 105-111 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents The solution of network problems in power engineering is often simplified by the use of coordinate transformations. These transformations take advantage of the symmetrical properties of electrical equipment. All possible transformations are deduced in this paper. It is found that the well-known oαβ-(Clarke)-, odq-(Park)- and o12-(symmetrical)-coordinates have to be supplemented by certain oGH-coordinates to form a complete set of transformations. These oGH-coordinates generalize the concept of the complex vector as known in the literature. The proper choice of the coordinate system is essential for the efficient use of these transformations. Criteria for the proper choice are given.
    Notes: Übersicht In der elektrischen Energietechnik wird die Lösung von Netzproblemen durch Anwendung von Koordinatentransformationen erleichtert. Dabei werden Symmetrieeigenschaften elektrischer Betriebsmittel ausgenutzt. Die möglichen Transformationen werden hergeleitet. Man stellt fest, daß die bekannten oαβ (Clarke)-, odq (Park)- und o12 (symmetrische)-Komponenten noch um die neu vorgestellten oGH-Komponenten zu ergänzen sind, um ein vollständiges System von Transformationen zu erhalten. Die oGH-Komponenten präzisieren den in der Literatur eingeführten Begriff “Raumzeiger”. Die richtige Wahl des Komponentensystems ist entscheidend für die Nutzung der möglichen Rechenvorteile. Kriterien für die geeignete Auswahl werden angegeben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01543290
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  • 2
    Electronic Resource
    Electronic Resource
    Scanning electron microscopy and X-ray diffraction studies of human bone oxalosis (1980)
    Springer
    Calcified tissue international 30 (1980), S. 109-119 
    Details
    ISSN: 1432-0827
    Keywords: Oxalosis ; Human bone ; Scanning electron microscopy ; X-ray diffraction ; Oxalate titration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Postmortem scanning electron microscopy of human phalanges in a chronic uremic hemodialysis patient with hyperparathyroidism showed the presence of confluent abnormal rounded formations with a radial rosette-like crystalline pattern in the diaphysis as well as in the epiphyseal part of the bones. These fan-shaped configurations were found either as individual formations within bone trabeculae or as numerous aggregated crystalline deposits replacing large parts of the bone structure. The microdissected content of such large areas submitted to X-ray diffraction analysis revealed the predominant presence of calcium oxalate monohydrate or whewellite with some traces of hydroxyapatite. Oxalate titration analysis indicated the presence of 25% of oxalate, corresponding to 45% in weight of whewellite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02408615
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  • 3
    Electronic Resource
    Electronic Resource
    Pathological and immunological observations in a case of Lesch-Nyhan-syndrome (1979)
    Springer
    European journal of pediatrics 132 (1979), S. 93-98 
    Details
    ISSN: 1432-1076
    Keywords: Lesch-Nyhan-Syndrome ; Pathology ; Hypoxanthine-Phosphoribosyltransferase ; Immunologically Crossreactive Material
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A patient with clearly developed features of the full Lesch-Nyhan syndrome and complete lack of activity of hypoxynthine-phosphoribosyl-transferase is described. The clinical picture was characterized by absence of spasticity, good control of autoaggression by behavior therapy, and no signs of renal insufficiency. After death, which was caused by a viral infection, pathological examination and a search for material immunologically crossreacting with hypoxanthine-phosphoribosyltransferase were possible. In spite of increased serum urate levels and raised urinary uric acid excretion there were no signs of urate deposits or damage in the internal organs, including the kidneys. Crossreactive material was found in the liver, kidneys and spleen, a relatively rare finding in the full Lesch-Nyhan-syndrome. The absence of any specific pathological changes in the brain of this patient is in agreement with earlier reports.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00447375
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  • 4
    Electronic Resource
    Electronic Resource
    Antihypertensive and hypouricaemic effects of nitrendipine in chronic renal failure (1989)
    Springer
    European journal of clinical pharmacology 36 (1989), S. 223-227 
    Details
    ISSN: 1432-1041
    Keywords: nitrendipine ; renal failure ; hypertension ; uric acid excretion ; metabolic effects ; cardiovascular risk factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary To evaluate the potential therapeutic value of calcium antagonists in hypertension associated with impaired renal function, blood pressure (BP), certain regulatory factors, and metabolic correlates of cardiovascular risk have been assessed in 15 patients with mild to marked chronic renal failure before and after 6 weeks of therapy with nitrendipine. Compared to placebo, nitrendipine (mean final dose 55 mg/day) decreased supine BP from 173/102 to 146/81 mm Hg and upright BP from 170/105 to 145/86 mm Hg. Heart rate, body weight (+0.8 kg) and exchangeable sodium (+176 mmol, not significant) were minimally increased, and plasma and whole blood volume, plasma angiotensin II and creatinine concentrations, and urinary electrolyte and creatinine excretion were not significantly changed. Nitrendipine increased uric acid excretion and lowered plasma uric acid by 24%; glucose, insulin, serum total lipids, and lipoprotein fractions were unchanged.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00558151
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  • 5
    Electronic Resource
    Electronic Resource
    Two-Body Nuclear Interaction, consistent, within the Limits of a Single Configuration, with the Spin and Magnetic Moment of the Ground-States of Lithium-6, Boron-10 and Lithium-7 (1951)
    [s.l.] : Nature Publishing Group
    Nature 167 (1951), S. 32-33 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Taking Vt = 1.87 Vc, Vs = -0.34 Ve, Vc positive (values within this small range), one obtains, also, agreement with the magnetic moments of boron-10 and lithium-7, again neglecting the contribution to these moments due to M12. It is to be noted that this interaction involves a tensor force of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/167032a0
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  • 6
    Electronic Resource
    Electronic Resource
    Diffuse Reflexion of X-Rays (1941)
    [s.l.] : Nature Publishing Group
    Nature 147 (1941), S. 511-511 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN a recent note Preston1 has commented upon the agreement of his experimental results for the diffuse scattering of X-rays by single crystals of aluminium with the predictions of both the Preston–Bragg block hypothesis and a formula derived by Faxén. It seems necessary to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/147511a0
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  • 7
    Electronic Resource
    Electronic Resource
    Infra-Red Spectra and the Structure of Molecules (1940)
    [s.l.] : Nature Publishing Group
    Nature 145 (1940), S. 646-649 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE have to go back only to 1800, to W. Herschel's discovery that beyond the red end of the sun's prismatic spectrum there is something capable of warming the bulb of a thermometer, to find the germ of a method which, through its contributions to our knowledge of molecular structure, is beginning to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/145646a0
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  • 8
    Electronic Resource
    Electronic Resource
    Absorption Spectrum of Heavy Methane (CH 3 D) in the Photographic Infra-Red (1936)
    [s.l.] : Nature Publishing Group
    Nature 138 (1936), S. 285-285 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE have recently prepared 40 litres of monodeuteromethane and examined its absorption spectrum in the photographic infra-red from 12,000 A. to 6000 A. under the high dispersion of a grating spectrograph. Examination of our plates reveals complete absence of even the strongest lines of ordinary ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/138285b0
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  • 9
    Electronic Resource
    Electronic Resource
    Structure of the Methane Molecule (1938)
    [s.l.] : Nature Publishing Group
    Nature 141 (1938), S. 916-916 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AN explanation of the complex rotational fine structure of the 1306 cm.−1 fundamental vibrational band of methane1 has been found which is based on a tetrahedrally symmetrical model for the molecule. The cause of the splitting of the rotational lines is a Coriolis ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/141916a0
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  • 10
    Electronic Resource
    Electronic Resource
    Use of the in situ technique in the study of degradation of lucerne and smooth bromegrass genotypes (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 43 (1988), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Six lucerne (Medicago sativa) genotypes (Beaver, Vernal and four other strains being developed at the University of Alberta) and five smooth bromegrass (Bromus inermis) genotypes (Carlton, Magna and three genotypes being developed) were examined in terms of forage dry matter (DM) yield and degradability, as determined by the rate and amount of material which disappeared from bags suspended in the rumen of cattle. Dry matter yield did not differ (p 〉 0·05) between lucerne genotypes at first cut. The smooth bromegrass strain 517 had a proportionately Oil higher (P 〈 0·05) DM yield than did the Magna strain. No differences (P 〈 0·05) were detected within either smooth bromegrass or lucerne genotypes for 48 or 60 h in situ DM degradability. The 416E smooth bromegrass genotype, however, had a significantly higher (P 〈 0·05) rate of DM degradation in the rumen than the other genotypes and also exhibited a longer (P 〈 0·05) lag period before a significant amount of DM degradability occurred. In the in situ technique, approximately eighteen bags would have been needed to obtain DM degradability measurements with a confidence interval of 0·04 for DM degradability of a probability of 0·95. Further in vivo studies with the bromegrass genotypes are warranted to ascertain if the differences in digestion rates and lag times are related to meaningful differences in animal intake and digestibility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1988.tb02148.x
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