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  • 1
    Electronic Resource
    Electronic Resource
    Chemical kinetics of stress relaxation of compressed wood blocks (1998)
    Springer
    Wood science and technology 32 (1998), S. 95-99 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Methods of chemical kinetics are used to study stress relaxation behaviour of wood blocks made fromPinus sylvestris and compressed parallel to grain at 20°C and 65% relative humidity. The effect of stress levels on stress behaviour is investigated. It is found that both activation volume and activation energy decrease with increasing stress level. The results prove the validity of the chemical kinetics approach in describing stress relaxation of wood blocks in compression. Suggestive explanations are given for the variations in activation energy and activation volume with stress level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702590
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  • 2
    Electronic Resource
    Electronic Resource
    Dielectric properties of NaCl1−xBr and KCl1−xBrx mixed ionic solution (1987)
    Springer
    Czechoslovak journal of physics 37 (1987), S. 1288-1295 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In the present paper a three-body potential model (TBPM) has been employed for the analysis of dielectric behaviour of NaCl-NaBr and and KCl-KBr mixed crystals with varying compositions. The physical properties like dielectric constants (ɛ 0 andɛ ∞), optic mode frequencies (Ω OLO andΩ TO), effective charge parameter (e s * ), optic mode Grüneisen parameters and strain derivatives ofɛ 0 andɛ ∞ dielectric constants have been calculated. The results achieved in the present study are found in fairly good agreement with the available experimental data. The results obtained by previous investigators are also shown for the sake of comparison.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01599678
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  • 3
    Electronic Resource
    Electronic Resource
    (CAC)5 detects DNA fingerprints and sequences homologous to gene transcripts in rice (1994)
    Springer
    Biochemical genetics 32 (1994), S. 1-8 
    Details
    ISSN: 1573-4927
    Keywords: rice ; simple repetitive sequence ; DNA fingerprinting ; (CAC)5 ; poly(A)+ transcripts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In the present report the potential of (CAC)5 is demonstrated for DNA fingerprinting in rice. Based on the fingerprint data, (CAC)5 was estimated to differentiate up to 6.3×108 genotypes of rice. In a search for homologous sequences in rice transcripts, four oligonucleotide probes, namely, (CAC)5, (GATA)4, (GACA)4, and (TG)10, were used. Among these probes, (CAC)5 showed hybridization to total rice RNA in a tissue-specific manner; while a band at 1.2 kb was common in both seed and leaf RNA, there were additional prominent bands at 1.9 and 2.3 kb in seed and leaf RNA, respectively. When (CAC)5 was hybridized to poly(A)+ RNA, in addition to a band at 1.2 kb in seed and leaf, hybridization was observed only in seed to heterogeneously sized RNAs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00557234
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  • 4
    Electronic Resource
    Electronic Resource
    Studies on adsorption behaviour of water vapour in lignin using the Brunauer-Emmett-Teller theory (1999)
    Springer
    Holz als Roh- und Werkstoff 57 (1999), S. 203-204 
    Details
    ISSN: 1436-736X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Eucalyptus regnans wurde untersucht. Die Adsorptions-Isotherme wurde mit Hilfe der Theorie von Brunauer, Emmett und Teller (BET-Theorie) bewertet. Eine Analyse der Adsorptionsdaten hinsichtlich primär und sekundär adsobierten Wassers wurde durchgeführt. Dabei ergab sich eine gute Übereinstimmung der experimentellen Adsoptions-Isothermen mit den theoretischen Kurven nach der BET-Theorie, die dadurch als wichtiges Hilfsmittel zur Deutung von Adsorptions-Isothermen bestätigt wurde.
    Notes: Eucalyptus regnans was studied. The adsorption isotherm was evaluated on the basis of the Brunauer, Emmett and Teller (BET) theory. Analysis of adsorption data in terms of primary and secondary water were carried out. A good agreement between experimentally obtained adsorption isotherms with those obtained using the BET theory, validating the use of the same in the elucidation of adsorption mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001070050040
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  • 5
    Electronic Resource
    Electronic Resource
    Chemical kinetics of stress relaxation of compressed wood blocks (1998)
    Springer
    Wood science and technology 32 (1998), S. 95-99 
    Details
    ISSN: 0043-7719
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Methods of chemical kinetics are used to study stress relaxation behaviour of wood blocks made from Pinus sylvestris and compressed parallel to grain at 20°C and 65% relative humidity. The effect of stress levels on stress behaviour is investigated. It is found that both activation volume and activation energy decrease with increasing stress level. The results prove the validity of the chemical kinetics approach in describing stress relaxation of wood blocks in compression. Suggestive explanations are given for the variations in activation energy and activation volume with stress level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702590
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  • 6
    Electronic Resource
    Electronic Resource
    Clustering of water molecules during adsorption of water in brown rot decayed and undecayed wood blocks of Pinus sylvestris (2000)
    Springer
    Holz als Roh- und Werkstoff 58 (2000), S. 340-341 
    Details
    ISSN: 1436-736X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Pinus sylvestris ) untersucht. Ein Teil der Proben war durch Braunfäulepilze abgebaut, der andere unbehandelt. Die mittlere Größe der Cluster wurde bestimmt mit Hilfe der Adsorptions-Isotherme bei 20 °C. Der Einfluß der relativen Luftfeuchte auf die Clusterbildung wurde ebenfalls untersucht. Die mittlere Clustergröße steigt kontinuierlich mit Erhöhung der relativen Feuchte an. Im Feuchtebereich zwischen 15 und 76% wurden im nicht abgebauten Holz größere Cluster gefunden; dagegen wurden bei Feuchten oberhalb 76% die Cluster im abgebauten Holz größer als in den Kontrollproben.
    Notes: Pinus sylvestris was studied. The average cluster size of water molecules was determined with the help of wood adsorption isotherm at 20 °C. The effect of relative humidity on cluster size was studied. Average cluster size progressively increases with an increase in relative humidity. It has been found that, while cluster size is greater in undecayed wood blocks at humidities from 15% to 76%, this situation got reversed at humidities greater than 76% and cluster size became increased in decayed wood blocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001070050441
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  • 7
    Electronic Resource
    Electronic Resource
    Enthalpy-entropy compensation during sorption of water in wood (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 60 (1996), S. 787-790 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Changes in free energy, enthalpy, and entropy were determined for sorption (desorption and adsorption) of water in wood. Findings were that changes are different for desorption and adsorption, have a strong dependence on moisture content, and have a weak dependence on temperature. Suggestive explanations are given for variation of energy changes during sorption with moisture content and temperature, and the differences in their values for desorption and adsorption are discussed. Studies on enthalpy-entropy compensation effect were made and a linear relationship is found to exist between enthalpy and entropy for both desorption and adsorption of water in wood. © 1996 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Clustering of water molecules during adsorption of water in wood (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 36 (1998), S. 665-671 
    Details
    ISSN: 0887-6266
    Keywords: clustering ; water ; wood ; adsorption ; Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Clustering behavior of water molecules during adsorption of water in wood was studied using the Zimm-Lundberg theory. The average cluster size of water molecules was determined with the help of wood adsorption isotherms at five temperatures. The effects of both relative humidity and temperature on average cluster size were studied. Average cluster size progressively increased with an increase in humidity. At humidities corresponding to fiber saturation, larger clusters were formed. Cluster size increased sharply with an increase in temperature at humidities close to saturation. Formation of large clusters at high temperature and humidities close to saturation is attributed to increased fraction of weakly bonded water and capillary condensation in such conditions. A description of adsorption of water in wood was provided in terms of average cluster size. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 665-671, 1998
    Additional Material: 5 Ill.
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  • 9
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    Ceramide, a target for antiretroviral therapy (2004)
    National Academy of Sciences
    Details
    Publication Date: 2004-10-15
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 10
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    Clustering of water molecules during adsorption of water in brown rot decayed and undecayed wood blocks of Pinus sylvestris (2000)
    Springer
    Details
    Publication Date: 2000-12-08
    Print ISSN: 0018-3768
    Electronic ISSN: 1436-736X
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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