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  • 1
    Electronic Resource
    Electronic Resource
    Protein contact dermatitis caused by Anisakis simplex (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Contact dermatitis 37 (1997), S. 0 
    Details
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0536.1997.tb02453.x
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of Ophiostoma ulmi and Ophiostoma novo-ulmi culture filtrates on elm cultures from genotypes with different susceptibility to Dutch elm disease (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Forest pathology 28 (1998), S. 0 
    Details
    ISSN: 1439-0329
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Cell cultures of callus tissue cultures obtained from four elm genotypes (Ulmus minor; Ulmus minor×Ulmus pumila; [Ulmus carpinifolia×Ulmus glabra] × [Ulmus wallichiana×Ulmus glabra]; and Ulmus pumila), either susceptible or resistant to Dutch elm disease (DED) were exposed to culture filtrates of Ophiostoma ulmi and Ophiostoma novo-ulmi. Elm cells were largely affected by crude culture filtrate incorporated into the media. However, the correlation between ‘in vivo’ cell resistance and growth in the presence of culture filtrate was poor: the effects of fungal media components were greater than that exerted by fungal exotoxins. Therefore, it is concluded that these ‘in vitro’ assays cannot be used to evaluate resistance sources to DED in elms, or to assess specific pathogenicity of fungal isolates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0329.1998.tb01194.x
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  • 3
    Electronic Resource
    Electronic Resource
    Biochemical studies on insecticide resistance in Musca domestica (1968)
    Springer
    Entomologia experimentalis et applicata 11 (1968), S. 15-29 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Der mikrosomale DDT-Stoffwechsel ist stärker bei Hausfliegenarten, die Resistenz gegen DDT aufweisen. Sowohl die empfindlichen wie die widerstandsfähigen Arten bringen in vitro zwei annähernd polare Metabolyte (Metabolyt 2 und 3) und einen wasserlöslichen Metabolyten hervor (Metabolyt 1). Die Resistenz gegen DDT bei einem der untersuchten Stämme (Fc) wird vermutlich durch das Zustandekommen grosser Mengen von Metabolyt 1 in vivo und nicht durch DDT-Dehydrochlorination verursacht. Die DDT-Dehydrochlorination an sich erklärt die Resistenz bei zwei Stämmen, P2/sel und DS, doch wird die Resistenz bei P2/sel noch durch mikrosomale Enzymtätigkeit erhöht. Die Stämme Fc und P2/sel, bei denen mikrosomale Oxydationsenzyme zur Wirkung kommen, weisen nach DDT-Vorbehandlung eine Induktion der mikrosomalen Enzyme auf. Gleichlaufend mit dieser Induktion der Enzyme durch DDT erfolgt eine grössere Aufnahme von C14-markiertem Uracyl in die RNS. Es wird vermutet, daß die “cross-resistance” zwischen DDT und Pyrethrum (und gleichzeitiger Resistenz gegen Naphthalin) in Zusammenhang mit der mikrosomalen Enzyminduktion stehen könnte.
    Notes: Abstract Microsomal metabolism of DDT is more active in housefly strains showing resistance to DDT. Susceptible as well as resistant strains produce two fairly polar metabolites in vitro (metabolites 2 and 3), and a water-soluble metabolite (metabolite 1). Resistance to DDT in one of the strains studied (Fc) is apparently brought about by the production of large amounts of metabolite 1 in vivo and not by DDT-dehydrochlorination. DDT-dehydrochlorination can explain resistance per se in two strains (P2/sel and DS), but additional degrees of resistance are given in the P2/sel strain by microsomal enzyme activity. The two strains (Fc and P2/sel) which employ microsomal oxidative enzymes show induction of microsomal enzymes upon DDT pre-treatment. This enzyme induction by DDT is accompanied by an increase in the rate of incorporation of C14-labelled uracil into total RNA. It is suggested that cross-resistance between DDT and pyrethrum (with associated resistance to naphthalene) may be related to microsomal enzyme induction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00295302
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  • 4
    Electronic Resource
    Electronic Resource
    Structural shape sensitivity analysis for nonlinear material models with strain softening (1999)
    Springer
    Structural optimization 17 (1999), S. 162-171 
    Details
    ISSN: 0934-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper describes some considerations around the analytical structural shape sensitivity analysis when the structural behaviour is computed using the finite element method with a nonlinear constitutive material model. Traditionally, the structural sensitivity analysis is computed using an incremental approach based on the incremental procedures for the solution of the structural equilibrium problem. In this work, a direct (nonincremental) formulation for computing these structural sensitivities, that is valid for some specific nonlinear material models, is proposed. The material models for which the presented approach is valid are characterized by the fact that the stresses at any time t can be expressed in terms of the strains at the time t and, in some cases, the strains at a specific past time t u (t u 〈 t). This is the case of elasticity (linear as well as nonlinear), perfect plasticity and damage models. A special strategy is also proposed for material models with strain softening. For the cases where it is applicable, the sensitivity analysis proposed here allows us to compute the structural sensitivities around any structural equilibrium point after finishing the solution process and it is completely independent of the numerical scheme used to solve the structural equilibrium problem. This possibility is particularized for the case of a damage model considering a strain-softening behaviour. Finally, the quality and reliability of the proposed approach is assessed through its application to some examples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01195941
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  • 5
    Electronic Resource
    Electronic Resource
    Environmental and physiological factors affecting the uptake of phosphate by Chlorobium limicola (1998)
    Springer
    Archives of microbiology 170 (1998), S. 252-258 
    Details
    ISSN: 1432-072X
    Keywords: Key wordsChlorobium limicola ; Green sulfur bacteria ; Phosphate limitation ; Continuous culture ; Phosphate ; accumulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The uptake of soluble phosphate by the green sulfur bacterium Chlorobium limicola UdG6040 was studied in batch culture and in continuous cultures operating at dilution rates of 0.042 or 0.064 h–1. At higher dilution rates, washout occurred at phosphate concentrations below 7.1 μM. This concentration was reduced to 5.1 μM when lower dilution rates were used. The saturation constant for growth on phosphate (K μ) was between 2.8 and 3.7 μM. The specific rates of phosphate uptake in continuous culture were fitted to a hyperbolic saturation model and yielded a maximum rate (Va max) of 66 nmol P (mg protein)–1 h–1 and a saturation constant for transport (K t) of 1.6 μM. In batch cultures specific rates of phosphate uptake up to 144 nmol P (mg protein)–1 h–1 were measured. This indicates a difference between the potential transport of cells and the utilization of soluble phosphate for growth, which results in a significant change in the specific phosphorus content. The phosphorus accumulated within the cells ranged from 0.4 to 1.1 μmol P (mg protein)–1 depending on the growth conditions and the availability of external phosphate. Transport rates of phosphate increased in response to sudden increases in soluble phosphate, even in exponentially growing cultures. This is interpreted as an advantage that enables Chl. limicola to thrive in changing environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002030050640
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  • 6
    Electronic Resource
    Electronic Resource
    Growth-rate-dependent bacteriochlorophyll c/d ratio in the antenna of Chlorobium limicola strain UdG6040 (1999)
    Springer
    Archives of microbiology 171 (1999), S. 350-354 
    Details
    ISSN: 1432-072X
    Keywords: Key words Bacteriochlorophyll ; Chlorobium limicola ; Chlorosomes ; Continuous culture ; Pigment synthesis ; S-adenosylmethionine methyltransferase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The green sulfur bacterium Chlorobium limicola UdG6040 exhibited a significant change in the spectral properties of its antenna when transferred from batch culture to a sulfide-limited chemostat. In steady-state continuous cultures, the in vivo absorption maximum of the culture changed to shorter wavelengths according to the dilution rate. The maximum difference observed was of 15 nm when cells were growing at 0.087 h–1. HPLC analyses revealed that the observed spectral change was caused by a partial enrichment of the original BChl c-containing antenna with BChl d molecules together with a change in the homolog composition of both pigments. The relative amount of BChl d reached a maximum value of 50% when cells were growing at 0.087 h–1. The content of BChl d decreased to less than the 22% when the dilution rate was diminished to 0.015 h–1. An unbalance of pigment synthesis at high dilution rates is suspected to be responsible of the changes observed in the antenna composition. Chlorosomes isolated from Chl. limicola UdG6040 growing at 0.070 h–1 contain organised pools of BChl c and BChl d in equal amounts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002030050721
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  • 7
    Electronic Resource
    Electronic Resource
    Densification of black agglomerate cork boards and study of densified agglomerates (1996)
    Springer
    Wood science and technology 30 (1996), S. 217-223 
    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 This work is related to a study about the densification of black agglomerate cork boards, through the development of a densification process and changing of different operational parameters. The densification allows a diversification of the fields of application for this material, shown by the densified products characteristics. The densification process is easy to use by the existing industries, and shows up and downstream advantages and a competing utilisation. This process gave rise to a patent application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00231635
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  • 8
    Electronic Resource
    Electronic Resource
    Declared value for the thermal conductivity coefficient of insulation corkboard (1997)
    Springer
    Wood science and technology 31 (1997), S. 355-365 
    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 This study presents the results of a set of tests for the determination of the thermal conductivity coefficient of samples extracted from boards of Insulation Corkboard (ICB) withdrawn from the usual production of the seven portuguese factories. These tests were carried out as a part of an interlaboratorial study integrated in the standardization program for cork of the sub-comission 4 of The National Technical Committee of Standardization (CT 16), in which participated the Cork Technological Centre (CTCOR), the National Laboratory of Civil Enginneering (LNEC) and the National Institute of Engineering and Industrial Technology (INETI). The purpose of this study aimed to contribute to the definition of the “declared value” of this thermal property to be included in the future European Standard (EN) specifying the characteristics of ICB for thermal insulating of buildings which is in preparation in the 88Th Technical Committee of The European Committee of Standardization CEN/TC-88 (CEN 1995). In view of the results, the declared value of thermal conductivity proposed was 0.045 W/m. °C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01159154
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  • 9
    Electronic Resource
    Electronic Resource
    Improvement ofPinus pinaster wood dimensional stability using cork industry wastes (1998)
    Springer
    Wood science and technology 32 (1998), S. 317-323 
    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 This article relates to a procedure of preparing solutions for wood treatment by dissolving the condensed waste material from the baking steam of expanded cork board production in organic solvents. These solutions were applied by way of different methods inPinus pinaster wood treatment. The use of these products and methods improved the pine wood dimensional stability giving rise to lower water absorption and swelling. This cork industry waste, is mainly constituted by tannins and waxes, and their solutions are easy to obtain at low cost. A patent application was done.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702788
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  • 10
    Electronic Resource
    Electronic Resource
    Structural shape sensitivity analysis for nonlinear material models with strain softening (1999)
    Springer
    Structural and multidisciplinary optimization 17 (1999), S. 162-171 
    Details
    ISSN: 1615-1488
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper describes some considerations around the analytical structural shape sensitivity analysis when the structural behaviour is computed using the finite element method with a nonlinear constitutive material model. Traditionally, the structural sensitivity analysis is computed using an incremental approach based on the incremental procedures for the solution of the structural equilibrium problem. In this work, a direct (nonincremental) formulation for computing these structural sensitivities, that is valid for some specific nonlinear material models, is proposed. The material models for which the presented approach is valid are characterized by the fact that the stresses at any timet can be expressed in terms of the strains at the timet and, in some cases, the strains at a specific past timet u (t u 〈t). This is the case of elasticity (linear as well as nonlinear), perfect plasticity and damage models. A special strategy is also proposed for material models with strain softening. For the cases where it is applicable, the sensitivity analysis proposed here allows us to compute the structural sensitivities around any structural equilibrium point after finishing the solution process and it is completely independent of the numerical scheme used to solve the structural equilibrium problem. This possibility is particularized for the case of a damage model considering a strain-softening behaviour. Finally, the quality and reliability of the proposed approach is assessed through its application to some examples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01195941
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    Paper (German National Licenses)
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