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  • 1
    Electronic Resource
    Electronic Resource
    Contact allergy due to colophony (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Contact dermatitis 20 (1989), S. 0 
    Details
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 7 resin acids, 3 symbolically prepared derivatives and the neutral fraction of Chinese colophony were studied by experimental sensitization using a modified FCA method. 4 resin acids, laevopimaric. abietic. podocarpic and tetrahydroabietic. proved to be weak sensitizers Neoabietic, dehydroabietic, isopimarie acid and larixol remained negative. However, the derivative, methyl abietate and calcium abietate. were shown to be moderate sensitizers. and the maleic-modified adduct to be a moderate to strong sensitizer. As laevopimaric acid plays only a minor rote in colophony, abietic acid must he considered a major, even if weak, allergen in non-modified colophony. The neutral fraction of colophony is also partially involved in colophony allergy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0536.1989.tb03094.x
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  • 2
    Electronic Resource
    Electronic Resource
    The synthesis of caffeic acid esters, a new group of naturally occurring contact allergens (1989)
    Springer
    Naturwissenschaften 76 (1989), S. 426-427 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00366169
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of convective clouds on the large-scale vorticity budget (1989)
    Springer
    Meteorology and atmospheric physics 41 (1989), S. 213-229 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary The effects of clouds on the large-scale vorticity budget are parameterized in terms of cloud mass flux and momentum differences between the cloud ensemble and the large-scale environment. The cloud mass flux distribution is calculated using the parameterization scheme of Arakawa and Schubert (1974). For the determination of the momentum effects of a cloud ensemble, three different parameterization concepts are developed: first, constant momentum in the cloud which is injected from the environment in the convergence layer of the lower troposphere; second, a generation of a vortex couplet induced by the tilting of horizontal vorticity components; third, drag effects of clouds which interact with the large-scale flow. The computed momentum effects from each of the three parameterizations are compared with the residual of the large-scale vorticity budget for B/C-scale observations during GATE 74 Phase III using a composite technique. With moderate convection and wind shear best results are achieved by the description of the vortex couplet; intense convection and small wind shear are best explained by the constant cloud momentum model; the drag of the clouds on the large-scale flow appears to dominate during periods of weak convection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01026111
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  • 4
    Electronic Resource
    Electronic Resource
    Nontoxic and toxic oligopeptides with D-amino acids and unusual residues in Microcystis aeruginosa PCC 7806 (1989)
    Springer
    Archives of microbiology 151 (1989), S. 411-415 
    Details
    ISSN: 1432-072X
    Keywords: Microcystis aeruginosa ; Cyanobacterium ; Toxin ; Oligopeptides ; D-Amino acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Toxic and nontoxic peptides were isolated from the cyanobacterium Microcystis aeruginosa PCC 7806 by a procedure including extraction of cells with water-saturated 1-butanol, chromatography of the extract on silica gel plates and high performance liquid chromatography (HPLC) on Partisil-5. The toxin was shown to be only a minor constituent, being negatively charged and thus separable by electrophoresis, within the HPLC-purified fraction. It contained erythro-β-methyl-D-Asp, D-Glu, D-Ala, L-Leu, and L-Arg known to be part of the Microcystis peptide-toxin with Mr 994. The major part of the HPLC-purified fraction was assigned, however, to a nontoxic peptide with a Mr of 956. Partial hydrolysis studies of the nontoxic peptide(s) revealed amino acid sequences composed of D-Glu, N-methyl-Phe, and 3,4-dehydro-Pro, aside from the common L-amino acids. Cyclic linkage in the nontoxic peptide(s) appears likely.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00416599
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  • 5
    Electronic Resource
    Electronic Resource
    In vitro Virulenz wundinfizierender Staphylokokken-Isolate von schwerbrandverletzten Patienten (1989)
    Springer
    Langenbeck's archives of surgery 374 (1989), S. 181-184 
    Details
    ISSN: 1435-2451
    Keywords: Burns ; Wound infection ; Staphylococcus aureus ; Bacterial virulence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 30Staphylococcus aureus Stämme von drittgradig verbrannten Patienten wurden hinsichtlich ihrer Fähigkeit zur Hämolysingenerierung und ihres Vermögens zur Histaminfreisetzung aus Mastzellen (RPMC) untereinander verglichen. Die bakteriellen Kulturüberstande von 8 Stämmen aus Wundbiopsien zeigten signifikant niedrigere in vitro Aktivitäten als die übrigen Staphylokokken-Kulturüberstände. Bei dem Vergleich der in vitro Aktivitäten der gewaschenen Bakterienzellen ergab sich ein umgekehrtes Verhältnis. Diese Befunde zeigen, daß beiS. aureus Isolaten, welche zum Zeitpunkt einer invasiven Brandwundeninfektion isoliert werden können, die mikrobiellen Pathogenitätsfaktoren an die Bakterienzelle gebunden bleiben.
    Notes: Summary The hemolysin and histamine releasing activity of 30S. aureus strains isolated from third degree burns of heavily burned patients was detected. The culture supernatants (cs) ofStaphylococcus aureus isolated during episodes of invasive burn wound infection displayed significantly lower amounts of hemolysin and histamine releasing activity as compared to cs of bacteria isolated when no sign of septicemia was present. In contrast, when washed bacterial cells were analysed, a reversed ratio could be observed. These data clearly indicate that in strains isolated during invasive burn wound infection pathogenicity factors remain attached to the bacterial surface of the staphylococci investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01261730
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  • 6
    Electronic Resource
    Electronic Resource
    Proteins ofNippostrongylus brasiliensis analyzed by immunoblotting (1989)
    Springer
    Parasitology research 75 (1989), S. 482-487 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Antigenic proteins were characterized by the immunoblotting technique with sera from rats and mice after infection as well as hyperimmune sera. The immune response of infected animals was mainly directed toward five proteins of adult worms (190, 118, 110, 98, and 52 kDa) and four proteins of the third larval stage (L3; 92, 78, 58, and 24 kDa). The immunoblots indicated that stage-specific proteins of the homogeneates were recognized. Three stage-specific proteins of L3 larvae (150, 135, and 125 kDa) and three proteins typical to the adult worm (100, 82, and 67 kDa) were identified. The majority of the worm proteins elicited an IgG response. IgE synthesis was induced by living and dead parasites and was directed towards four proteins (190, 150, 125, and 98 kDa). Three proteins additionally induced an IgG or IgM antibody response. The immune response as shown by the immunoblotting technique seems to be directed towards (1) antigens that are present for the duration of an infection and (2) stage-specific antigens that are expressed for only a short time during the life cycle of the parasite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00930977
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  • 7
    Electronic Resource
    Electronic Resource
    Cyclodextrins as chiral stationary phases in capillary gas chromatography. Part IV: Heptakis(2,3,6-tri-O-pentyl)-β-cyclodextrinPart III: HRC & CC 11 (1988) 621. (1989)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 12 (1989), S. 35-39 
    Details
    ISSN: 0935-6304
    Keywords: Enantioselective gas chromatography ; Cyclodextrin ; Alcohols ; Hydroxy acids ; Carbohydrates ; Cyanohydrins ; Olefins ; Alkyl halides ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: O-Perpentylated β-cyclodextrin has been evaluated as chiral stationary phase in capillary gas chromatography. Enantioselectivity is observed towards many chiral hydroxy compounds, including cyanohydrins and carbohydrates. Most importantly, the enantiomers of many olefins and alkyl halides can be resolved on this chiral phase. The thermal stability of the cyclodextrin derivative exceeds 200°C.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240120113
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  • 8
    Electronic Resource
    Electronic Resource
    Enantioselective capillary gas chromatography on the basis of host-guest interactions with modified cyclodextrins (1989)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 12 (1989), S. 641-644 
    Details
    ISSN: 0935-6304
    Keywords: Enantioselective capillary gas chromatography ; Modified cyclodextrins ; Host-guest interactions ; Inclusion phenomena ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The use of per-O-alkylated as well as partially alkylated/acylated derivatives of α-, β-, and γ-cyclodextrins as chiral stationary phases has opened many new applications to enantioselective gas chromatography. Chiral recognition is now independent of hydrogen bonding interactions and enantiomer separations are achieved for a large variety of compounds which could not be separated before, including lactones, spiroacetals, alkyl halides, olefins, and even compounds with axial asymmetry.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240121002
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  • 9
    Electronic Resource
    Electronic Resource
    Cyclodextrins as chiral stationary phases in capillary gas chromatography. Part V: Octakis(3-O-butyryl-2,6-di-O-pentyl)-γ-cyclodextrinPart IV: HRC 12 (1989) 35. (1989)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 12 (1989), S. 732-738 
    Details
    ISSN: 0935-6304
    Keywords: Enantioselective gas chromatography ; Cyclodextrin ; Amino acids ; Hydroxy acids ; Terpene alcohols ; Terpene ketones ; Lactones ; Cyclopropane derivatives ; Cyclic ethers ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: γ-Cyclodextrin with 3-O-butyryl and 2,6-di-O-pentyl residues is a very versatile chiral stationary phase for enantiomer separation. Most of the common and many uncommon amino acids can be separated as well as α- and β-hydroxy acids, chiral alcohols, diols, triols, ketones, bicyclic, and tricyclic acetals, amines, alkyl halides, lactones, and functionalized cyclopropane derivatives.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240121108
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  • 10
    Electronic Resource
    Electronic Resource
    Cyclodextrins as chiral stationary phases in capillary gas chromatography. Part VI: Octakis (2,3,6-tri-O-pentyl)-γ-cyclodextrinPart V: HRC 12 (1989) 732. (1989)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 12 (1989), S. 790-792 
    Details
    ISSN: 0935-6304
    Keywords: Enantioselective gas chromatography ; Cyclodextrin ; β-Chiral olefins ; Fe-Carbonyl complexes of alkenes ; Tetramethyl-trans-cyclooctene ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Perpentylated γ-cyclodextrin is a very hydrophobic liquid which exhibits enantioselectivity toward a number of non-polar chiral substrates including the saturated hydrocarbons cis- and trans-pinane, β-chiral olefins, iron(O) tricarbonyl complexes of prochiral olefins and 3,3,8,8-tetramethyl-trans-cyclooctene, a compound with planar chirality.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240121205
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