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  • 1985-1989  (4)
  • 1988  (4)
  • Life and Medical Sciences  (4)
  • ALCOHOL
  • Basidiomycete
  • Dopamine
  • Lignin model compounds
  • 1
    Electronic Resource
    Electronic Resource
    Nayudamma memorial symposium - madras, India, 15-17 December 1986 (1988)
    New York, NY : Wiley-Blackwell
    BioEssays 8 (1988), S. 130-132 
    Details
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bies.950080410
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Yeast flocculaiton: A dynamic equilibrium (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 4 (1988), S. 199-208 
    Details
    ISSN: 0749-503X
    Keywords: Flocculation ; yeast ; agitation ; equilibrium ; mannose ; pH value ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The steady state in yeast flocculation is a dynamic equilibrium between flocculated and dispersed yeast cells. The free cell concentraiton is directly proportional to the total cell concentration and may be expressed as an equilibrium constant. Increased agitation decreases floc size and equlibrium constant whilst increasing floc-surface area and free cell concentration. Values of equilibrium constant are influenced by agitation in a complex relationship probably involving the floc-surface area and floc momentum.Inhibition of flocculation by mannose and low pH is reversible and becomes greater with increased agitation. Both these inhibitions appear consistent with a weakening of flocculent bond strength by these inhibitors.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320040305
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Purification, characterization, and partial structure of D factor from Polysphondylium violaceum (1988)
    Chichester [u.a.] : Wiley-Blackwell
    Developmental Genetics 9 (1988), S. 653-662 
    Details
    ISSN: 0192-253X
    Keywords: aggregation-stimulating factor ; chemotaxis ; founder cell ; glorin ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The A component of D factor (DfA) was overproduced during development of wild type Polyspondylium violaceum strain China after starvation in liquid medium. Crude DfA excreted by strain China was partially purified by ultrafiltration using Amicon YM10 and YM2 filters with DfA extracted from the filtrate by absorption onto a preparative grade C-18 resin. The concentrated material was further purified on a C-18 analytical column using both acetonitrile:water and methanol: water gradients. This highly purified fraction was a single component with a final specific activity of greater than 106 units per mg dry weight. Purified DfA is red having a broad visible absorbance at 500 nm and a ultraviolet (uv) absorbance at 290-300 nm. The red chromophore is sensitive to pH and to oxidation-reduction. 1H and 13C nmr studies with purified DfA indicate that it is a C11 compound with both polar and non-polar regions. The non-polar region has been identified as a hexanone and is the same as the side chain of DIF from Dictyostelium discoideum. Purified DfA has been used in studies with the D factor non-producing mutant, tsg-119 cyc-1 aggA586 (A586), to show that neither production of glorin nor chemotactic sensitivity to glorin are affected by D factor. However, founder cells develop in A586 mutant populations only after addition of D factor. These data suggest that DfA may be necessary for induction of aggregate formation by aggregation-competent amoebae.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/dvg.1020090441
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Chondrons extracted from canine tibial cartilage: Preliminary report on their isolation and structure (1988)
    Hoboken, NJ [u.a.] : Wiley-Blackwell
    Journal of Orthopaedic Research 6 (1988), S. 408-419 
    Details
    ISSN: 0736-0266
    Keywords: Articular cartilage ; Chondrocyte ; Pericellular matrix ; Pericellular capsule ; Chondron ; Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: We report on the morphology and structure of single and multiple chondrons isolated from homogenized samples of fresh and fixed canine tibial cartilage. Phase contrast, Nomarski, and scanning electron microscopy observations show each chondron to be composed of a chondrocyte and its pericellular matrix enclosed within a “felt-like” pericellular capsule. The extraction of intact chondrons from cartilage homogenates confirms the structural validity of chondron concept and emphasizes the intrinsic mechanical strength of the capsule. Frayed collagen fibers radiate from multiple chondron columns suggesting a shear-resistant, structural interrelationship between capsular components and type II collagen fibers. Future development of chondron extraction procedures could provide a unique model with which to study the structure, biochemistry, and function of articular cartilage chondrocytes and their pericellular microenvironment.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jor.1100060312
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    Paper (German National Licenses)
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