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  • Articles: DFG German National Licenses  (14)
  • 1990-1994  (10)
  • 1980-1984  (4)
  • 1
    Electronic Resource
    Electronic Resource
    The Alternative Binding Site for Protein A in the Fab Fragment of Immunoglobulins (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 37 (1993), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Twenty-six new human or murine monoclonal immunoglobulins (IgM, IgA, murine IgGl or human IgG3) with a known V-region sequence were tested for alternative (non-Fc) binding to Staphylococcal protein A. Seven of them did not bind at all. Four immunoglobulins (all mouse IgGl) were bound but easily eluted (at pH 6). They were probably bound via the Fc part. All eleven were classified as negative for alternative binding. Fifteen immunoglobulins were found to bind more firmly; they came off the protein A column at pH 4–3 (alternative binders).Amino acid sequences of immunoglobulins that have been typed in the present work or earlier (25 binders and 26 non-binders) were compared. The light chain, the C region of the heavy chain and the D and JH segments look irrelevant for alternative binding. The N-terminal portion (amino acids 1–94) of the H chain probably forms the ligand of protein A. A peptide making the ligand cannot be reliably localized within this stretch but binder proteins had a high homology in residues 6–29.All mouse immunoglobulins expressing Vh genes of families J606 or S107 were alternative binders; those expressing other families were non-binders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1993.tb01764.x
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  • 2
    Electronic Resource
    Electronic Resource
    Immunoglobulin Binding Specificities of the Homology Regions (Domains) of Protein A (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 38 (1993), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Protein A binds immunoglobulins and it has two target structures, one in Feγ (CH) and the other in selected VH regions. The protein has five homology regions (domains). A, B, C, D, and E. Fc-binding and VH-binding have been reported to be non-competitive, suggesting that different domains are responsible for the binding of the two ligands. On the other hand, all five domains have been reported to bind Fc. I studied binding of different immunoglobulins by protein A or its domain B (rBB). The results show that separate domains bind VH and Fc. If all five domains are capable of binding Fc, the ones that bind Vh have low affinity for Fc. Furthermore, the number of Fc-binding domains varies depending on the type of the IgG being bound. Human IgG1 or lgG2 or rabbit IgG (Fc) seem to be bound by several domains (possibly four), and domain B is one of them. Mouse IgG1 or lgG2b are bound by fewer domains not including B. Murine lgG2a is also bound by fewer domains but B is one of them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1993.tb01739.x
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on extraction of iron(III) and cobalt(II) chlorides by quaternary ammonium halides (1984)
    Springer
    Transition metal chemistry 9 (1984), S. 199-202 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The extraction of iron(III) and cobalt(II) from hydrochloric acid solutions by Hyamine 1622, a quaternary ammonium halide, in dichloroethane is described. The effect of acidity, salting-out agent, metal and extradant concentrations and temperature, has been investigated. The extraction mechanism is discussed in the light of results obtained. Separation of iron(III) and cobalt(II) is also outlined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00618617
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  • 4
    Electronic Resource
    Electronic Resource
    Allelopathic effects ofPolygonum aviculare L. II. Isolation, characterization, and biological activities of phytotoxins (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 1011-1023 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; inhibitors ; phenols ; glycosides ; Chenopodium album ; Rhizobium ; Azotobacter ; Cynodon dactylon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In earlier work, we found thatPolygonum aviculare had pronounced allelopathic effects against several test species. Four inhibitors were isolated from livingPolygonum plants, three of which were glucosides. Four different inhibitors were isolated fromPolygonum residues and soil underPolygonum stands, and none of these occurred in soil fromCynodon dactylon (L.) Pers. stands. Three of these were glycosides containing both fructose and cellobiose as the sugars. Color reactions of all the inhibitors indicated that they are phenolic in nature. All the inhibitors reduced seed germination and/or seedling growth ofChenopodium album L. Moreover some of them inhibited growth of different strains ofRhizobium andAzotobacter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987882
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  • 5
    Electronic Resource
    Electronic Resource
    Environmental impact of seawater desalination plants (1991)
    Springer
    Environmental monitoring and assessment 16 (1991), S. 75-84 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Enormous amounts of seawater are desalted everyday worldwide. The total world production of fresh water from the sea is about 2621 mgd (9.92 million m3 day-1 1985 figures). Desalting processes are normally associated with the rejection of high concentration waste brine from the plant itself or from the pretreatment units as well as during the cleaning period. In thermal processes, mainly multistage flash (MSF) thermal pollution occurs. These pollutants increase the seawater temperature, salinity, water current and turbidity. They also harm the marine environment, causing fish to migrate while enhancing the presence of algae, nematods and tiny molluscus. Sometimes micro-elements and toxic materials appear in the discharged brine. This paper will discuss the impact of the effluents from the desalination plants on the seawater environment with particular reference to the Saudi desalination plants, since they account for about 50% of the world desalination capacity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00399594
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  • 6
    Electronic Resource
    Electronic Resource
    Zur Wirkung von Milchsäure auf den Varroa-Befall der Biene (1993)
    Springer
    Journal of pest science 66 (1993), S. 31-32 
    Details
    ISSN: 1612-4766
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract 40% lactic acid was sprayed 3 times into each of two bee colonies. The rate of infestation was determined, before beginning the experiment and after each of the applications. The treatments showed a mean percentage reduction in the brood infestation byVarroa of 76,7% in the first colony and 85,2% in the second. These data indicate that it is possible to control the Varroasis by means of lactic acid successfully and without side effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01909139
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  • 7
    Electronic Resource
    Electronic Resource
    Allelopathic effects ofPolygonum aviculare L. I. Vegetational patterning (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 993-1009 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; interference ; patterning ; biological control ; Polygonum ; Cynodon ; Chenopodium ; Sorghum ; Gossypium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Polygonum aviculare was observed to spread rapidly into heavy stands ofCynodon dactylon (L.) Pers. resulting in death of the latter. This indicated a strong interference againstCynodon dactylon. Measurements of selected soil minerals and physical factors indicated that competition was probably not the chief cause of that interference. Soil collected under deadPolygonum was very inhibitory to all test species exceptSporobolus pyramidatus (Lam.) Hitchc., suggesting the presence of inhibitory compounds. Tops and roots ofPolygonum, root exudates, and leachate of the tops inhibited seed germination and seedling growth of most test species. Therefore, allelopathy apeared to be the dominant component of the interference, with competition probably accentuating its effects.Polygonum aviculare was inhibitory toGossypium barbadense L. andSorghum bicolor (L.) Moench, indicating that allelopathy is an important component of the interference byPolygonum against crop yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987881
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  • 8
    Electronic Resource
    Electronic Resource
    Allelopathic effects ofPolygonum aviculare L. (1983)
    Springer
    Journal of chemical ecology 9 (1983), S. 761-774 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; fatty acids ; GC-MS ; Polygonum aviculare ; Cynodon dactylon ; Rhizobium ; Azotobacter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract We previously reported thatPolygonum aviculare has a strong allelopathic action againstCynodon dactylon (L.) Pers. and other test species. Moreover, we found that several phenolic compounds appeared to be important allelochemics in this activity. We have now isolated other potential inhibitors fromP. aviculare residues and soil underPolygonum stands, and none of these occurred in soil underC. dactylon stands. GC-MS analysis revealed that these additional inhibitors are long-chain fatty acids with 14–22 carbons. Nine were identified inP. aviculare residues and seven in soil underP. aviculare. Sodium salts of all the identified fatty acids inhibited seedling growth ofC. dactylon and at least some test strains of the nitrogen-fixing bacteria,Azotobacter andRhizobium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988781
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  • 9
    Electronic Resource
    Electronic Resource
    Comparative plant uptake and environmental behavior of U-series radionuclides at a uranium mine-mill (1992)
    Springer
    Journal of radioanalytical and nuclear chemistry 156 (1992), S. 253-267 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Concentrations of U, Th, Ra, Pb, and Po were determined in native vegetation and underlying substrate (soil and tailings) at various sites around a conventional open pit, acid leach uranium production operation in the Western United States. Radionuclide concentrations in substrate and vegetation were generally elevated above background at all sites disturbed by mining and milling activities. Observed plant/soil CR values for vegetation growing on exposed, weathered tailings were ordered as follows:238U〉230Th〉210Po,226Ra〉210Pb. We suspect that in the case of sulfuric acid leached tailings, Ra and Pb are sequestered as sulfates, which are highly insoluble relative to U and Th sulfates, resulting in reduced availability for plant uptake. Soil acidity and the saturation condition at the tailings impoundment edge tend to enhance radionuclide availability for plant uptake. The transport of radionuclides to foliage and subsequent retention and absorption may play a role in plant contamination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02038343
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  • 10
    Electronic Resource
    Electronic Resource
    Neutron field produced by a KAMAN A-711 sealed tube generator (1992)
    Springer
    Journal of radioanalytical and nuclear chemistry 166 (1992), S. 279-285 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Utilization of a sealed tube neutron generator requires the knowledge of the lateral flux density distribution and the mean energy of primary neutrons near to the target. The ion composition of the incident beam is related to the operating conditions of a generator. These parameters have been determined for a KAMAN A-711 sealed tube machine by the foil activation method using different energy and fluence monitor reactions. An analytical expression is also given for the calculation of the relative flux density for a typical geometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02163834
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