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  • Springer  (18)
  • MDPI Publishing  (4)
  • Hindawi  (2)
  • Molecular Diversity Preservation International (MDPI)
  • 2015-2019  (12)
  • 1990-1994  (12)
  • 1940-1944
  • 2016  (1)
  • 2015  (11)
  • 1992  (12)
  • 1
    Electronic Resource
    Electronic Resource
    Dielectric relaxation of polyorganophosphazenes (1992)
    Springer
    Journal of inorganic and organometallic polymers and materials 2 (1992), S. 255-267 
    Details
    ISSN: 1572-8870
    Keywords: Polyorganophosphazene ; dielectric relaxation ; two-site model ; conformation analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Dielectric relaxation spectra of poly(bis-trifluoroethoxy phosphazene) (PBFP), poly(bis-n-propoxy phosphazene) (PBPP), and poly(bis-n-propylamino phosphazene) (PBPAP) were measured in wide temperature and frequency regions, and the α-relaxation caused by micro-Brownian motion of segments in the rubbery state and the β-relaxation due to the local motions of the polymer in the glassy region were observed. The dielectric spectra of PBFP at temperatures higher than the rubbery region exhibited a mesophase transition at 358 K. From conformation analysis according to the two-site model, it has been elucidated that the mechanism for β-relaxation of these samples is hindered internal rotation of the side groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00696551
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  • 2
    Electronic Resource
    Electronic Resource
    Disposition of β-hexachlorocyclohexane, p,p′-DDT, and trans-chlordane administered subcutaneously to monkeys (Macaca fascicularis) (1992)
    Springer
    Archives of environmental contamination and toxicology 22 (1992), S. 25-29 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract To evaluate skin lipid analysis for the accumulation level of environmental pollutants, the correlations between organochlorine pesticide residues in adipose tissue, blood, and skin lipids of monkeys were studied. The mixture of β-hexachlorocyclohexane (β-HCH), p,p′-DDT, and trans-chlordane was subcutaneously given to monkeys once weekly for 5 weeks at dose levels of 1 and 10 mg/kg. The chemicals distributed in adipose tissue, blood, and skin lipids were determined six times after the last dosing at intervals of 4 to 9 weeks. Oxychlordane and p,p′-DDE were detected in all tissues together with the administered chemicals. In blood and adipose tissue, trans-chlordane decreased rapidly and oxychlordane and p,p′-DDE increased gradually and then remained at constant levels. β-HCH and p,p′-DDT in adipose tissue increased until the 12th week and then decreased in all animals. The correlation coefficients between blood and adipose tissue regardless of dose level and collection time for each chemical ranged from 0.83 to 0.94. Correlation coefficients between skin lipids and adipose tissue varied with the chemical, namely, 0.31, 0.72, 0.81, 0.81, and 0.83 for p,p′-DDE, tras-chlordane, p,p′-DDT, β-HCH, and oxychlordane, respectively. The results indicated that skin lipid analysis may be useful for the evaluation of specific pollutants in the body burden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00213298
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  • 3
    Electronic Resource
    Electronic Resource
    Fundamental properties in fractal nature and thermal analysis of powders (1992)
    Springer
    Journal of thermal analysis and calorimetry 38 (1992), S. 1901-1910 
    Details
    ISSN: 1572-8943
    Keywords: fractal ; TA of powders ; theory of stochastic processes ; size distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Basierend auf einer Aufstellung in der Theorie stochastischer Prozesse wurde eine Hauptgleichung für die Größeverteilung eingeführt, die einen Größenminderungsvorgang beschreibt. Unter Anwendung einer absoluten Größenkonstante und eines Skalenkonzeptes kann man zu einer verallgemeinerten Form der Gaudin-Schuhmann-Gleichung und der Rosin-Rammler-Gleichung gelangen und die enge Beziehung der beiden Formeln zeigen. Von einem neuentwickelten Gesichtspunkt aus wird gezeigt, daß die Gaudin-Schuhmann-Gleichung das Gesetz der Selbstähnlichkeit der Verteilung in der Fractaltheorie erfüllt und bei der Bestimmung thermoanalytischer Eigenschaften von Pulvern eine bedeutende Rolle spielt. Als Beispiel wird gezeigt, daß DTA-Kurven gemahlener Dolomitproben durch Unterschiede in der Partikelgrößenverteilung der Probe entscheidend beeinflußt werden. Sowohl die DTA- als auch die TG-Kurven spiegeln die Pulvereigenschaften sehr gut wieder; beide werden deshalb zur Charakterisierung von Pulverproben vorgeschlagen.
    Notes: Abstract Based on a formulation applied in the theory of stochastic processes, a master equation is introduced for the size distribution which describes a size reduction process. Using an absolute size constant and a scaling concept, we can get a generalized form of the Gaudin-Schuhmann equation and of the Rosin-Rammler equation for size-reduced products and show the intimate relationship between these two formulae. From a newly developed fractal point of view, it is shown that the Gaudin-Schuhmann equation satisfies a self-similarity law of distribution in the fractal theory and plays an important role in determining the thermoanalytical properties of a powder. As an illustration, DTA curves for ground dolomites are shown to be greatly influenced by the difference in particle size distribution of the sample. The DTA curves as well as the TG curves reflect well the powder characteristics; the TG-DTA curves are therefore suggested as being useful for characterizing powder samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01974684
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  • 4
    Electronic Resource
    Electronic Resource
    Monte-Carlo simulation on notched strength of unidirectional boron—aluminium composites (1992)
    Springer
    Journal of materials science 27 (1992), S. 4061-4069 
    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 Monte-Carlo simulation was carried out on the fracture behaviour of centre-notched unidirectional boron-aluminium composites assuming quasi self-similar notch extension. The main results obtained in this work are summarized as follows: (i) the experimental results for notched strength of Awerbuch and Hahn and those of Poe and Sova could be described well by the present simulation method; (ii) the notched strength decreased with increasing notch size for a fixed width of specimen and with increasing width of specimen for a fixed relative notch size; (iii) the semi-empirical failure criteria proposed by Waddoups, Eisenman and Kaminski, Whitney and Nuismer, and Mar and Lin could approximately describe the notched strength obtained by the present simulation method under limited conditions, despite the difference in basic concept between these models and the present method; and (iv) the characteristic lengths in the models of Waddoups, Eisenman and Kaminski, and Whitney and Nuismer, which were originally assumed to be material constants, were dependent on notch size and width of specimen. It was demonstrated that these characteristic lengths have a strong positive correlation with damage zone size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01105105
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  • 5
    Electronic Resource
    Electronic Resource
    Immunocytochemical localization of β-1,3-glucan recognition protein in the silkworm, Bombyx mori (1992)
    Springer
    Cell & tissue research 268 (1992), S. 431-437 
    Details
    ISSN: 1432-0878
    Keywords: Hemocytes ; Hemolymph ; Phenoloxidase ; β-1,3-glucan ; Bombyx mori (Insecta)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A monospecific antibody against β-1,3-glucan recognition protein (a 62 kDa protein) of the larval silkworm prophenoloxidase activating system was used to study the localization of the protein. Among tissues from 5th instar larvae, only hemocytes and plasma were shown to contain a 62 kDa polypeptide immunoreactive with the antibody. Ultra-thin sections of the hemocytes were stained by an indirect immunogold staining method. Labelling occurred in the granules and cytoplasm of granulocytes and in the spherules and cytoplasm of spherulocytes. It was most conspicuous in granules of granulocytes and uniformly labelled spherules of spherulocyte, whereas no labelling was evident in prohemocytes, plasmatocytes and oenocytoids. The results are discussed in relation to the mode of recognition of fungi as non-self in insect hemocoel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00319149
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  • 6
    Electronic Resource
    Electronic Resource
    Tensile strength of unidirectional γ-Al2O3 fibre/Al-5mass% Cu matrix composite at room and high temperatures (1992)
    Springer
    Journal of materials science 27 (1992), S. 4667-4677 
    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 The tensile strength of unidirectional γ-alumina fibre-reinforced Al-5 mass% Cu alloy composite prepared by the casting method, increased with increasing temperature, reaching a peak value at about 500 K, and then decreased. The reason for this is discussed from the viewpoints of influence of ductility of the compound layer (CuAl2) adhering to the fibre surface on the strength of the fibre and the influence of the yield stress of the matrix on the strength of the composite, using a simplified model to calculate strain energy release rate of the fibre and the Monte Carlo simulation technique. Two main results were found. At room temperature, the premature fracture of the compound led to formation of a crack, which caused reduction in strength of the fibre and composite. The temperature dependence of strength of the present composite was considered to be controlled by the following competing factors: increase in ductility of the compound with increasing temperature which acts to raise the strength of the fibre and softening of the matrix which acts to reduce the strength of the composite. The reason why the strength of the composite increased with increasing temperature below 500 K, could be attributed to the predominance of the former factor over the latter one. However the reason why the strength of composite decreased with increasing temperature above 500 K could be attributed to the predominance of the latter factor over the former one.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01166004
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  • 7
    Electronic Resource
    Electronic Resource
    Conductance study of the complexation of substituted and lariat 16-crown-5 derivatives with alkali metal ions in nonaqueous solvents (1992)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 13 (1992), S. 129-138 
    Details
    ISSN: 1573-1111
    Keywords: Solvent and lariat effect ; 16-crown-5 derivatives ; alkali metal ions ; complex stability ; conductometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Formation constants (K ML) of 1:1 complexes of 15-(2,5-dioxahexyl)-15-methyl-16-crown-5 (L16C5) and 15,15-dimethyl-16-crown-5 (DM16C5) with alkali metal ions were determined in acetonitrile (AN) and propylene carbonate (PC) by conductometry at 25°C. Except for the case of Li+-and K+-16C5 complexes in PC, the selectivity sequences of L16C5 and DM16C5 are identical with those of the parent crown ether 16-crown-5 (16C5) regardless of the solvent (AN, PC, methanol) (Na1 〉 Li+ 〉 K+ 〉 Rb+ 〉 Cs+), which show the size-fit correlation. The selectivities of L16C5 and DM16C5 for the alkali metal ions are governed not by the sidearms but by the cavity size. The stability of the crown ether complex is dependent not on the dielectric constant but largely on the donor number of the solvent. TheK ML(M1 +)/K ML(M2 +) ratio of L16C5 or 16C5 varies very much with the solvent in the cases of M1=Na, M2=K and M1=Na, M2=Li, but that of DM16C5 is almost constant regardless of the solvent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01053636
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  • 8
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    Monte-Carlo simulation on notched strength of unidirectional boron?aluminium composites (1992)
    Springer
    Details
    Publication Date: 1992-01-01
    Print ISSN: 0022-2461
    Electronic ISSN: 1573-4803
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 9
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    IJERPH, Vol. 12, Pages 2532-2542: Physiological and Psychological Effects of Forest Therapy on Middle-Aged Males with High-Normal Blood Pressure (2015)
    MDPI Publishing
    Details
    Publication Date: 2015-02-26
    Description: Time spent walking and relaxing in a forest environment (“forest bathing” or “forest therapy”) has well demonstrated anti-stress effects in healthy adults, but benefits for ill or at-risk populations have not been reported. The present study assessed the physiological and psychological effects of forest therapy (relaxation and stress management activity in the forest) on middle-aged males with high-normal blood pressure. Blood pressure and several physiological and psychological indices of stress were measured the day before and approximately 2 h following forest therapy. Both pre- and post-treatment measures were conducted at the same time of day to avoid circadian influences. Systolic and diastolic blood pressure (BP), urinary adrenaline, and serum cortisol were all significantly lower than baseline following forest therapy (p 〈 0.05). Subjects reported feeling significantly more “relaxed” and “natural” according to the Semantic Differential (SD) method. Profile of Mood State (POMS) negative mood subscale scores for “tension-anxiety,” “confusion,” and “anger-hostility,” as well as the Total Mood Disturbance (TMD) score were significantly lower following forest therapy. These results highlight that forest is a promising treatment strategy to reduce blood pressure into the optimal range and possibly prevent progression to clinical hypertension in middle-aged males with high-normal blood pressure.
    Print ISSN: 1661-7827
    Electronic ISSN: 1660-4601
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by MDPI Publishing
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  • 10
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    Sensors, Vol. 15, Pages 26921-26928: Highly Sensitive Measurement of Bio-Electric Potentials by Boron-Doped Diamond (BDD) Electrodes for Plant Monitoring (2015)
    MDPI Publishing
    In: Sensors
    Details
    Publication Date: 2015-10-27
    Description: We describe a sensitive plant monitoring system by the detection of the bioelectric potentials in plants with boron-doped diamond (BDD) electrodes. For sensor electrodes, we used commercially available BDD, Ag, and Pt plate electrodes. We tested this approach on a hybrid species in the genus Opuntia (potted) and three different trees (ground-planted) at different places in Japan. For the Opuntia, we artificially induced bioelectric potential changes by the surface potential using the fingers. We detected substantial changes in bioelectric potentials through all electrodes during finger touches on the surface of potted Opuntia hybrid plants, although the BDD electrodes were several times more sensitive to bioelectric potential change compared to the other electrodes. Similarly for ground-planted trees, we found that both BDD and Pt electrodes detected bioelectric potential change induced by changing environmental factors (temperature and humidity) for months without replacing/removing/changing electrodes, BDD electrodes were 5–10 times more sensitive in this detection than Pt electrodes. Given these results, we conclude that BDD electrodes on live plant tissue were able to consistently detect bioelectrical potential changes in plants.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
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