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  • Springer  (248)
  • Blackwell Publishing Ltd
  • Institute of Physics (IOP)
  • MDPI Publishing
  • 2020-2021
  • 1990-1994  (101)
  • 1970-1974  (147)
  • 1
    Electronic Resource
    Electronic Resource
    Engineering methods of regulating water ecosystems (1992)
    Springer
    Power technology and engineering 26 (1992), S. 769-772 
    Details
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01545815
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  • 2
    Electronic Resource
    Electronic Resource
    Hydraulic methods of protecting aquatic ecosystems of small rivers (1990)
    Springer
    Power technology and engineering 24 (1990), S. 628-632 
    Details
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01429339
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  • 3
    Electronic Resource
    Electronic Resource
    Rare events in queueing systems—A survey (1994)
    Springer
    Queueing systems 16 (1994), S. 1-49 
    Details
    ISSN: 1572-9443
    Keywords: Rare events ; large deviations ; busy period ; small parameter method ; perturbation analysis ; triangular scheme ; reliability ; repairable systems ; regenerative simulation ; variance reduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Several practical approaches have been used to estimate the probabilities of rare events occurring in queueing processes. Rare events of practical interest can be considered as large deviations for a fixed queueing process (such as level crossing by the waiting time, or the queue length) or as those for a limiting triangular scheme. This paper is a survey of the literature devoted to the regenerative analysis of rare events. Because of the importance of busy period parameters, rare events within a busy period are discussed. A number of small parameter theorems useful in rare events analysis are outlined, including singular states aggregation theorems. Simulation methods for rare events analysis and other numerical methods are also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01158947
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  • 4
    Electronic Resource
    Electronic Resource
    Detection of atomic oxygen in flames by absorption spectroscopy (1994)
    Springer
    Applied physics 59 (1994), S. 543-546 
    Details
    ISSN: 1432-0649
    Keywords: 32.20 ; 42.55 ; 82.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The absolute concentration of atomic oxygen in an atmospheric pressure hydrogen/air flame has been measured using Intracavity Laser Spectroscopy (ICLS) based on a dye laser pumped by an argon-ion laser. Absorptions at the highly forbidden transitions at 630.030 nm and 636.380 nm were observed at an equivalent optical length of up to 10 km. The relatively low intensity of the dye laser avoids photochemical interferences that are inherent to some other methods for detecting atomic oxygen. The detection sensitivity is about 6 × 1014 atom/cm3 and can be improved with better flame and laser stabilization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01082398
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  • 5
    Electronic Resource
    Electronic Resource
    Lipid peroxidation, low-level chemiluminescence and regulation of secretion in the mammary gland (1993)
    Springer
    Cellular and molecular life sciences 49 (1993), S. 870-875 
    Details
    ISSN: 1420-9071
    Keywords: Mammary gland ; regulation of protein secretion ; chemiluminescence ; lipid peroxidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In mammary explants of lactating mice, changes in the intensity of chemiluminescence (CL) were observed after the addition to the incubation medium of hormones and mediators that are involved in the regulation of secretion: oxytocin, acetylcholine, epinephrine and norepinephrine. A 15-min period of treatment with oxytocin, epinephrine or norepinephrine changed the level of thiobarbituric acid-reactive substances (TBARS). Two mammary explants, one of which was treated with oxytocin, acetylcholine, epinephrine or norepinephrine, were found to interact even when separated by a quartz glass wall. Analysis of the level of TBARS formation in these two explants showed that the observed interactions might be connected with light emission resulting from lipid peroxidation (LP) processes. The possible role of LP and low-level CL in the regulation of mammary gland secretion is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952600
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  • 6
    Electronic Resource
    Electronic Resource
    Modelling of formation processes of inclusion complexes of coumarin laser dyes and β-cyclodextrin by the MM2 force field method. I. 7-Amino-4-methylcoumarins (1992)
    Springer
    Molecular engineering 2 (1992), S. 153-163 
    Details
    ISSN: 1572-8951
    Keywords: Inclusion complexes ; coumarin laser dyes ; β-cyclodextrin ; MM2 force-field method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In order to improve the generating and photochemical properties of coumarin laser dyes, the following active media were synthesized: inclusion complexes of β-cyclodextrin (β-CD) and 7-amino-4-methylcoumarins (COU1, COU102, COU120). Complex formation processes were studied, and the structure of the inclusion complexes was estimated using the method of MM2 molecular mechanics. The data obtained suggest the reasons underlying the complex structure effects on their spectral, luminescent and generating characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00999706
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  • 7
    Electronic Resource
    Electronic Resource
    Evaluation of fibre strength characteristics on the basis of the fibre fragmentation test (1993)
    Springer
    Journal of materials science 28 (1993), S. 6307-6312 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A proper description of the fibre fragmentation test becomes more and more important because of the continual development of new types of fibres, an example being the oxide composite fibres tested in the present work. An attempt at a strict formulation of the problem involved in the description of the fibre fragmentation test is presented. It takes into account a distortion of fibre strength distribution function caused by the fibre breakage process occurring under increasing external load. The fibre strength distribution function is determined by a distribution function of defects on a fibre as well as the distribution function of the defect strength. The formulation of the problem considered results in a system of differential equations which is solved assuming some simplifications. The solution leads to a choice of a particular set of statistical fibre strength characteristics. The procedure is applied to oxide composite fibres developed for a high temperature use.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01352188
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  • 8
    Electronic Resource
    Electronic Resource
    Influence of the nature of an organic solvent on the kinetic parameters of the thermal homolysis of five-coordinate complexes of alkylcobalt (1992)
    Springer
    Russian chemical bulletin 41 (1992), S. 650-655 
    Details
    ISSN: 1573-9171
    Keywords: cobalt(III)-carbon bond ; homolytic cleavage in solutions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract By the spectrophotometric method in solvents of different natures a study was made of the kinetics of the homolytic breakage of the axial cobalt-carbon bond in five-coordinate complexes with dianionic tetradentate equatorial ligands. The negative values obtained for the activation entropies of the processes investigated are explained by the existence of interaction between the components of the primary radical pair and the solvent molecules. The kinetic parameters of the redox-interaction reactions of some macrocyclic complexes of cobalt(II) with chloroform and carbon tetrachloride were determined. A scheme in which the autocatalytic homolysis of the Co-CH 3 bond in the presence of chlorine-containing solvents is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01150885
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  • 9
    Electronic Resource
    Electronic Resource
    Some properties of 1-phosphorus(IV)-substituted cycloalkanecarboxylic acids and their derivatives (1992)
    Springer
    Russian chemical bulletin 41 (1992), S. 1466-1473 
    Details
    ISSN: 1573-9171
    Keywords: cycloalkylphosphonates ; cycloalkylphosphinates ; cycloalkylphosphine oxides ; cycloalkanecarboxylic acids ; x-ray structural analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An x-ray structural study of single crystals of 1-diphenylphosphinyl-cyclo-propane- and 1-diphenylphosphinylcyclobutanecarboxylic acids was conducted. 1-Phosphorylated cycloalkanecarboxylic acid amides were obtained from the corresponding acids by the reaction with thionyl chloride with subsequent treatment with primary and secondary amines. It was shown that the reaction of 1-phosphorylated 1-functional substituted cycloalkanes with trimethylbromosilane takes place with preservation of the cyclic structure and yields phosphoric acid silyl esters, and the corresponding cycloalkylphosphonic and cycloalkylphosphinic acids were synthesized by their hydrolysis in soft conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00864348
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  • 10
    Electronic Resource
    Electronic Resource
    The 10th European Symposium on Polymer Spectroscopy (ESOPS-10) (1993)
    Springer
    Russian chemical bulletin 42 (1993), S. 221-222 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00700029
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