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  • 1
    Online Resource
    Online Resource
    Determinantal Rings (1988)
    Berlin, Heidelberg : Springer Berlin Heidelberg
    Details Availability
    Keywords: Mathematics ; Group theory ; Topological Groups ; Lie groups. ; Topological Groups, Lie Groups ; Group Theory and Generalizations ; Mathematics ; Determinantenring
    Description / Table of Contents: Determinantal rings and varieties have been a central topic of commutative algebra and algebraic geometry. Their study has attracted many prominent researchers and has motivated the creation of theories which may now be considered part of general commutative ring theory. The book gives a first coherent treatment of the structure of determinantal rings. The main approach is via the theory of algebras with straightening law. This approach suggest (and is simplified by) the simultaneous treatment of the Schubert subvarieties of Grassmannian. Other methods have not been neglected, however. Principal radical systems are discussed in detail, and one section is devoted to each of invariant and representation theory. While the book is primarily a research monograph, it serves also as a reference source and the reader requires only the basics of commutative algebra together with some supplementary material found in the appendix. The text may be useful for seminars following a course in commutative ring theory since a vast number of notions, results, and techniques can be illustrated significantly by applying them to determinantal rings
    Type of Medium: Online Resource
    Pages: Online-Ressource (VIII, 240 p, online resource)
    ISBN: 9783540392743 , 9783540194682
    Series Statement: Lecture Notes in Mathematics 1327
    URL: https://doi.org/10.1007/BFb0080378
    URL: http://dx.doi.org/10.1007/BFb0080378
    URL: https://swbplus.bsz-bw.de/bsz404655432cov.jpg
    URL: https://zbmath.org/?q=an:0673.13006
    URL: http://d-nb.info/880673214/04
    DOI: 10.1007/BFb0080378
    RVK:
    SI 850
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    Biochemical Analysis of Bone Compacta in Osteogenesis Imperfecta (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 543 (1988), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1988.tb55322.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Mechanismus und Bedeutung der arteriolären Media-Hypertrophie/Hyperplasie bei der arteriellen Hypertonie (1988)
    Springer
    Journal of molecular medicine 66 (1988), S. 1151-1159 
    Details
    ISSN: 1432-1440
    Keywords: Arterial Hypertension, structural changes ; Arteriolar hypertrophy and hyperplasia ; Na+/Li+-exchange ; Na+/H+-antiport ; Phosphatidylinositol metabolism ; Growth factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The most common haemodynamic abnormality in human essential hypertension is an increase in systemic vascular resistance. Morphologic substrate for increased flow resistance is a narrowing of the lumen of arteriolar resistance vessels. During the course of essential hypertension, this is associated with an increase in wall (mainly media) thickness due to hypertrophy and hyperplasia of vascular smooth muscle cells. In contrast to concepts interpreting media thickening strictly as structural adaptation to increased perfusion pressure, various lines of evidence also point to pressure independent factors. In this context, extracellular factors such as “growth factors” as well as alterations in the activity of intracellular messenger systems must be considered. Recent studies suggest that substances generally known to act as vasoconstrictors such as angiotensin II, noradrenaline and arginine-vasopressin may also stimulate vascular smooth muscle cell growth and proliferation. Intracellular messenger systems with possible significance in the response to trophins and/or mitogens of vascular smooth muscle cells are phospholipase C, protein kinase C and the Na+/H+-antiport. These systems have been demonstrated to be altered in hypertension supporting the concept that one endogenous factor in human essential hypertension with pathophysiological significance, at least in a subgroup of patients, may be an enhanced reactivity of vascular smooth muscle cells to trophic and mitogenic stimuli. In this context, intracellular messenger systems such as phospholipase C, protein kinase C and/or the Na+/H+-antiport may play an important pathophysiological role.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01727661
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  • 4
    Electronic Resource
    Electronic Resource
    Die Bedeutung der Dopplerblutströmungsmessung zur Erkennung der Plazentainsuffizienz (1988)
    Springer
    Archives of gynecology and obstetrics 244 (1988), S. S12 
    Details
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01080103
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  • 5
    Electronic Resource
    Electronic Resource
    Insulin-like growth factors and insulin increase the contractility of neonatal rat cardiocytes in vitro (1988)
    Springer
    Basic research in cardiology 83 (1988), S. 647-654 
    Details
    ISSN: 1435-1803
    Keywords: neonatal ratcardiocytes ; IGF ; insulin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the newborn several situations of hyperinsulinism can be associated with myocardial hypertrophy and increased contractility. Insulin and the insulin-like growth factors (IGF) are derived from a common ancestral molecule. Insulin exerts mainly metabolic action, whereas the IGFs promote cell multiplication and differentiation. Using an assay system of cultured neonatal myocardial cells the stimulatory action of insulin and the insulin-like growth factors I and II on myocardial cell contractility was investigated. Spontaneously beating aggregates of myocardial cells were synchronized by an electric impulse generator. Contractility was measured via the amplitude of contraction by an optoelectronic system. Insulin at a concentration of 6,250 and 12,500 μU/ml increased the contractility by 11 and 18%; IGF-I at a concentration of 12 and 25 ng/ml, and IGF-II at a concentration of 25 and 50 ng/ml increased the contractility by 16 and 22%, and 13 and 18%, respectively. Lower concentrations did not provoke a significant increase in contractility. Insulin only in supraphysiological doses increases the contractility of neonatal myocardial rat cells, whereas both insulin-like growth factors act in physiological concentrations. Therefore, during hyperinsulinism insulin may increase myocardial contractility via the IGF receptor and not via the insulin receptor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01906959
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  • 6
    Electronic Resource
    Electronic Resource
    Synthese von [2]-Catenanen aus [2]-Rotaxanen (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 961-970 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of [2]-Catenanes from [2]-RotaxanesStarting from the rotaxane 18a a mixture of catenane 21 and rotaxane 23 is obtained by attaching a polymethylene bridge between the methylene groups in α-position of the sulfonyl groups. The isocyclic catenane 28 containing a 28- and a 46-membered ring is obtained from the catenane 21 by splitting the bonds between the bridgehead atoms and the sulfonyl groups. The 1H-, 13C-NMR, and mass spectra of this compounds are discussed.
    Notes: Ausgehend von dem Rotaxan 18a wird durch Angliederung einer Polymethylenbrücke zwischen den beiden zu den Sulfonylgruppen α-ständigen Methylengruppen ein Gemisch von Catenan 21 und Rotaxan 23 synthetisiert. Aus 21 wird nach Spaltung der Bindungen zwischen den Brückenkopfatomen und den Sulfonylgruppen das isocyclische Catenan 28, bestehend aus einem 28-und einem 46-gliedrigen Ring, erhalten. Die 1H-, 13C-NMR-Spektren und Massenspektren dieser Verbindung werden diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210522
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  • 7
    Electronic Resource
    Electronic Resource
    Durchflußkontrolle kleiner Dosierpumpen bei stetiger und pulsierender StrömungVortrag von G. Vetter auf dem Jahrestreffen der Verfahrens-Ingenieure, 30. Sept. bis 2. Okt. 1987 in Freiburg. (1988)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 60 (1988), S. 672-685 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Flow control for small metering pumps with continuous and pulsating flow. Metering of small flows with high discharge pressure is performed mainly by displacement metering pumps. The necessary mass-flow control shows problems with pulsating piston- or diaphragm metering pumps. A survey explains the presently available continuous and discountinuous methods of mass- and volume flow control. Special investigations have been performed with differential scales and mass flow meters based on the Coriolis- and the thermal principle. The differential weighing method shows good accuracy down to minimum mass flows of 0.1 kg/h. This method is expensive and requires vibration protected installation. The Coriolis flow meter, applicable over a similar range, precisely integrates the pulsating signal, but requires damping or signal averaging for regulation purposes. Thermal flow meters prove rather sensitive to temperature fluctuations. Under stable conditions and with proper calibration this principle may be applied to flows even below 0.1 kg/h.
    Additional Material: 26 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330600905
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  • 8
    Electronic Resource
    Electronic Resource
    Triazolopyridine, a new derivative for the structural determination of fatty acids by gas chromatography/mass spectrometry (1988)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 23 (1988), S. 566-572 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Triazolopyridine is proposed as a new derivative for the location of branches and double bonds in fatty acids. It is compared with previously used derivatives and found to be clearly superior to the pyrrolidide and slightly superior to the β-picolinyl ester with regard to the structure-specific fragmentation pattern. It is prepared by reacting the activated acid with 2-hydrazinopyridine followed by cyclization.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210230803
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