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  • 1
    Electronic Resource
    Electronic Resource
    2,3-Dihydronaphto[2,3-b][1,4]dioxine (1998)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 54 (1998), S. 1865-1867 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270198009470
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Modelling the process of release of a chemical from wood in finite volumes of water in succession (1995)
    Springer
    Wood science and technology 29 (1995), S. 77-85 
    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 Chemicals used for protection of wood against fungi may be released in water when the sample comes into contact with water. The process of release of pentachlorophenol in water was studied in this paper, when the presaturated wood specimen is immersed in a finite volume of water up to a time at which equilibrium is not attained. The wood sample is then dried and immersed again in water. This process is continued many times. Moreover a finite coefficient of matter transfer at the wood surface is observed. A numerical model with finite differences was successfully tested by comparing the kinetics of release obtained either by experiments and calculation. The process was simplified in the sense that only the transfer of the chemical through the water located in the wood was considered. The model is thus able to provide the kinetics of release and the profiles of concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229336
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Study of the release in water of a chemical used for preservation of wood. Effect of the dimensions of the wood (1996)
    Springer
    Wood science and technology 30 (1996), S. 443-454 
    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 Various chemicals are used for protecting wood samples against fungi, and some of them are released in water, leading to pollution of the water. The kinetics of release of pentachlorophenol in water has here been studied, by considering the diffusion through the wood along the three principal axes of diffusion. The experiments and the modelling of the process is successfully coupled. The numerical model takes the three principal diffusivities, the partition factor, the volumes of wood and water into account. The effect of the length of the wood sample taken along the longitudinal axis of diffusion is especially studied, as the longitudinal diffusivity is much higher than the other two principal diffusivities. The effect of the relative volumes of wood and water is also of considerable interest not only for the concentration of the chemical in water but also for the rate of release.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00244439
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Process of absorption and desorption of methanol with a 3-dimensional transport through Picea wood (1994)
    Springer
    Wood science and technology 28 (1994), S. 173-184 
    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 The process of absorption of methanol in liquid state by a wood sample, as well as the following step of desorption, is studied. A 3-dimensional transfer takes place within a cubic wood sample, this cube being cut in such a way that the sides of the cube are parallel with the longitudinal, radial and tangential axes of diffusion. A numerical model taking into account all the facts, e. g. diffusion within the solid and constant concentration on the surface during the stage of absorption, and diffusion within the solid and evaporation from the surface during the stage of desorption, is built and successfully tested. A pseudo-equilibrium of absorption is attained after an immersion time of about 3 hours in the liquid, and the whole amount of methanol is evaporated during the stage of desorption. The process can be described by a 3-dimensional diffusion with constant principal diffusivities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193325
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Study of the release in water of chemicals used for wood preservation. Effect of wood dimensions (1997)
    Springer
    Wood science and technology 31 (1997), S. 51-62 
    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 ␣␣Various chemicals are used for protecting wood samples against fungi, and some of them are released in water, leading to pollution of the water. The kinetics of pentachlorophenol release in water has here been studied by considering the diffusion through the wood along the three principal axes of diffusion. The experiments and the modelling of the process is successfully coupled. The numerical model takes into account the three principal diffusivities, the partition factor, the volumes of wood and water. The effect of wood sample length along the longitudinal axis of diffusion is studied especially, as longitudinal diffusivity is much higher than the other two principal diffusivities. The effects of the relative volumes of wood and water are also of considerable interest not only for the concentration of the chemical in water but also for the rate of release.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00705700
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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