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  • 1
    Electronic Resource
    Electronic Resource
    Sensitization to thimerosal and previous vaccination (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Contact dermatitis 32 (1995), 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.1600-0536.1995.tb00764.x
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  • 2
    Electronic Resource
    Electronic Resource
    Experiences with the severity scoring of atopic dermatitis in a population of German pre-school children (1997)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 137 (1997), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Severity scoring of atopic dermatitis (SCORAD) was introduced as a standard tool but has not been used in a population-based epidemiological study; the objective of the present study was to determine the practicability of this instrument in this setting. We assessed the distribution of the severity of atopic eczema in the community and investigated differences between east and west Germany. A factor analysis was then carried out to characterize the variables of this scoring system and to analyse possible relationships within them. A multicentre cross-sectional study was carried out in five east German and two west German locations in 1994; pre-school children (5–6 years old) were investigated and cases of atopic eczema identified by a dermatological examination. The SCORAD was used to determine the severity of atopic eczema and the results assessed using analysis of variance and principal component analysis (varimax rotation). In all, 1511 (76·2%) of the children originally contacted participated and 11·3% were diagnosed with atopic eczema at the time of examination. The median severity score was 21·4 (interquartile range 13·5) and there was a tendency to higher scores in west Germany for the mean overall score, the intensity score and the extent. ‘Erythema’ (1·30 vs. 1·06; P= 0·006) and ‘excoriation’ (0·77 vs. 0·36; P= 0·002) were significantly more prominent in children with eczema from west Germany (adjusted for observer). Interobserver variabilities of the SCORAD parameters were calculated, adjusted for location and were in accordance with earlier findings. Principal component analysis identified three independent factors accounting for 54·1% of the total variance. A severity factor, characterized by ‘extent’, ‘lichenification’, ‘excoriation’ and ‘pruritus’, was separated from a factor with an acute eczema-type profile (‘erythema’, ‘oedema’, ‘oozing’) and a factor whose major characteristics were ‘extent’, ‘dryness’, and ‘sleep loss’. We conclude that atopic eczema is frequent in pre-school children. The SCORAD proved to be readily applicable and useful in epidemiological studies, but further validation is needed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.1997.tb03786.x
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  • 3
    Electronic Resource
    Electronic Resource
    Epidemiology of allergic diseases (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 52 (1997), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Schäfer T, Ring J. Epidemiology of allergic diseases.The escalation of allergic diseases (hay fever, asthma, atopic eczema) over recent decades has been linked to an increase in environmental pollutants. The prevalence of hay fever is associated with genetic predisposition, and some reports show an association with urban areas, socioeconomic status, and combined high allergen and automobile exhaust exposure. In asthma, there is also some evidence for geographical variations in prevalence; exercise challenge tests prove positive more often in urban areas than in rural areas. Although genetic predisposition is the strongest single risk factor for atopic eczema, air pollutants may aggravate the condition by acting as unspecific irritants and immunomodulators, leading to increased immunoglobulin E expression. In a study of 678 pre-school children, the influence of maternal smoking habits on individual measures of atopy revealed a positive association between smoking during pregnancynactation, and a positive history of atopic eczema. An East-West German comparative study examining different types and levels of air pollution, i.e. sulphurous (industrial; East) and oxidising (urban; West), showed that the prevalence of atopic eczema was greatest in East Germany. When various direct and indirect parameters of air pollution exposure were measured, the greatest association with atopic eczema was found with NOx exposure (indoor use of gas without a cooker hood), and close proximity to roads with heavy traffic. The increased prevalence of atopic eczema cannot be explained by changes in study methodology over time, or conventional risk factors alone; environmental risk factors may be an important contributing factor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1997.tb04864.x
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  • 4
    Electronic Resource
    Electronic Resource
    Atopic eczema and other manifestations of atopy: results of a study in East and West Germany (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 51 (1996), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Within an environmental health study, dermatologic examination of 1273 pre-school-age children (5–7 years old) was carried out in selected areas of East (n= 287) and West (n= 987) Germany in spring 1991. On the basis of comparable genetic background, the influence of a different exposure to air pollutants on the manifestation of atopic diseases was investigated. Halle an der Saale (East Germany) and Duisburg (North/South) as well as Essen (West Germany) were chosen as polluted study areas, whereas the countryside town of Borken (West Germany) served as a control region. Outdoor pollution with particles and SO2 was significantly higher in Halle an der Saale. Of the total study group. 12.9% suffered from atopic eczema at the time of examination. The prevalence was highest in East Germany (17.5%; adjusted odds ratio [OR] 1.39, confidence intervals [CI] 0.77–2.52, compared to Borken). The reported frequencies of hay fever and asthma in the total study population were 2% and 1.3%, respectively, without significant differences between study sites. Some 34.7% of the children showed at least one positive skin prick test reaction; significantly (P〈 0.001) higher sensitization rates were obtained in western regions (Essen, Duisburg-South) than in the control region (Borken) and East Germany. Multivariate analysis of the prevalence of atopic eczema showed associations with parental predisposition (OR 1.52, CI 1.03–2.25), sex (for boys, OR 0.63, CI 0.43–0.92), location (Duisburg-South vs Borken OR 0.52, CI 0.30–0.96). month of investigation (May vs April, and March vs February OR 0.55, CI 0.37–0.81), contact with rabbits (for girls, OR 2.90, CI 1.36–6.19), animal fur in bedrooms (2.17, 1.01–4.67), indoor use of gas without hood (1.68, 1.11–2.56), and distance of homes from a busy road (〈50 m 1.71, 1.07–2.73). Nonsignificant associations were observed for history of helminthic infections (OR 1.61, CI 0.98–2.64) and high parental education level (OR 1.83, CI 0.83–4.02). In East and West Germany, atopic eczema seems to follow a course different from that of respiratory allergic diseases and specific sensitization, a fact which underlines the need for a differentiated analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1996.tb04665.x
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  • 5
    Electronic Resource
    Electronic Resource
    IgE antibodies to Hymenoptera venoms in the serum are common in the general population and are related to indications of atopy (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 51 (1996), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Determination of Hymenoptera venom (HV)-specific serum IgE antibodies is a useful diagnostic method in patients with systemic anaphylactic reaction (SAR) to Hymenoptera stings. In a general population cohort, we determined the prevalence of SAR and HV-specific IgE antibodies and assessed parameters associated with the latter. A total of 277 voluntarily participating inhabitants of rural Bavaria (Germany) (232 adults, mean age 38.0 years; 45 children, mean age 8.4 years) were investigated for a history of atopic disease or SAR to insect stings; in 258 of these, total IgE and specific IgE antibodies to HV (Apis melliferu, Vespulu vulguris/germanica) and four common aeroallergens (birch pollen, grass pollen, house-dust mite, and cat dander) in the serum were determined. Nine (3.3%) subjects reported SAR to insect stings. In 27.1% of the sera, specific IgE antibodies to HV were found, to bee venom in 24.8%, and to wasp venom in 8.5% (P〈0.000l) Of those exhibiting HV-specific IgE, 7.1% reported SAR to insect stings. A personal history of atopic disease (hay fever, asthma, or atopic eczema) was present in 16.7%, specific IgE to common aeroallergens was found in 32.6%, and total IgE〉 100 kU/1 was found in 22.5%. Specific serum IgE to HV was significantly associated with male sex (female vs. male, OR =0.47; CI 0.25-0.86), young age (children vs. adults, OR =2.80; CI 1.25-6-28), a history of SAR to insect stings (OR=4.16; CI 1.15-15.03), total sIgE〉 100 kU/1 (OR=3.88; CI 1.98-7.60), and specific IgE antibodies to three of the four aeroallergens (grass pollen, OR = 7.24 CI 3.66-14.38; birch pollen, OR=3.67 CI 1.54-8.81; and house-dust mite, ORz4.61 CI 2.08–10.32). It is concluded that immunologic sensitization to HV is common in the general population and is associated with atopy-related I humoral IgE hyperresponsiveness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1996.tb04632.x
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  • 6
    Electronic Resource
    Electronic Resource
    Metabolism of hyperthermophiles (1995)
    Springer
    World journal of microbiology and biotechnology 11 (1995), S. 26-57 
    Details
    ISSN: 1573-0972
    Keywords: Acetate formation ; acetyl-CoA oxidation ; Archaea ; Bacteria ; chemolithoautotroph ; chemoorganoheterotroph ; glycolytic pathway ; hyperthermophiles ; metabolic pathways ; peptide metabolism ; sugar metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Hyperthermophiles are characterized by a temperature optimum for growth between 80 and 110°C. They are considered to represent the most ancient phenotype of living organisms and thus their metabolic design might reflect the situation at an early stage of evolution. Their modes of metabolism are diverse and include chemolithoautotrophic and chemoorganoheterotrophic. No extant phototrophic hyperthermophiles are known. Lithotrophic energy metabolism is mostly anaerobic or microaerophilic and based on the oxidation of H2 or S coupled to the reduction of S, SO inf4 sup2- , CO2 and NO inf3 sup- but rarely to O2. the substrates are derived from volcanic activities in hyperthermophilic habitats. The lithotrophic energy metabolism of hyperthermophiles appears to be similar to that of mesophiles. Autotrophic CO2 fixation proceeds via the reductive citric acid cycle, considered to be one of the first metabolic cycles, and via the reductive acetyl-CoA/carbon monoxide dehydrogenase pathway. The Calvin cycle has not been found in hyperthermophiles (or any Archaea). Organotrophic metabolism mainly involves peptides and sugars as substrates, which are either oxidized to CO2 by external electron acceptors or fermented to acetate and other products. Sugar catabolism in hyperthermophiles involves non-phosphorylated versions of the Entner-Doudoroff pathway and modified versions of the Embden-Meyerhof pathway. The ‘classical’ Embden-Meyerhof pathway is present in hyperthermophilic Bacteria (Thermotoga) but not in Archaea. All hyperthermophiles (and Archaea) tested so far utilize pyruvate:ferredoxin oxidoreductase for acetyl-CoA formation from pyruvate. Acetyl-CoA oxidation in anaerobic sulphur-reducing and aerobic hyperthermophiles proceeds via the citric acid cycle; in the hyperthermophilic sulphate-reducer Archaeoglobus an oxidative acetyl-CoA/carbon monoxide dehydrogenase pathway is operative. Acetate formation from acetyl-CoA in Archaea, including hyperthermophiles, is catalysed by acetyl-CoA synthetase (ADP-forming), a novel prokarvotic enzyme involved in energy conservation. In Bacteria, including the hyperthermophile Thermotoga, acetyl-CoA conversion to acetate involves two enzymes, phosphate acetyltransferase and acetate kinase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00339135
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  • 7
    Electronic Resource
    Electronic Resource
    Hybridomas in a bioreactor cascade: modeling and determination of growth and death kinetics (1996)
    Springer
    Cytotechnology 21 (1996), S. 263-277 
    Details
    ISSN: 1573-0778
    Keywords: hybridomas ; serum-free medium ; monoclonal antibodies ; reactor series ; kinetics ; modeling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Hybridomas were cultured under steady-state conditions in a series of two continuous stirred-tank reactors (CSTRs), using a serum-free medium. The substrate not completely converted in the first CSTR, was transported with the cells to the second one and very low growth rates, high death rates, and lysis of viable cells were observed in this second CSTR. These conditions are hardly accessible in a single vessel, because such experiments would be extremely time-consuming and unstable due to a low viability. In contrast to what is often observed in literature, kinetic parameters could thus be derived without the neccessity for extrapolation to lower growth rates. Good agreement with literature averages for other hybridomas was found. Furthermore, showing that the reactor series is a valuable research tool for kinetic studies under extreme conditions, the possibility to observe cell death under stable and defined steady-state conditions offers interesting opportunities to investigate apoptosis and necrosis. Additionally, a model was developed that describes hybridoma growth and monoclonal antibody production in the bioreactor cascade on the basis of glutamine metabolism. Good agreement between the model and the experiments was found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00365349
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