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  • 1985-1989  (4)
  • 1965-1969  (4)
  • 1925-1929
  • 1988  (4)
  • 1969  (4)
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Material
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  • 1985-1989  (4)
  • 1965-1969  (4)
  • 1925-1929
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    CHLOROQUINE-INDUCED MYOPATHY (1969)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 81 (1969), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: SUMMARY.— A case of generalized muscle weakness due to prolonged chloroquine ingestion is described. The clinical and histological findings are discussed. Eventual recovery of function can be expected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.1969.tb16011.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    An Instrument for Measuring Retardation Times of Deoxyribonucleic Acid Solutions (1969)
    s.l. : American Chemical Society
    Macromolecules 2 (1969), S. 637-643 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma60012a015
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    Paper (German National Licenses)
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  • 3
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    Unknown
    There Is Something to Be Said (1988)
    Washington, etc. : Periodicals Archive Online (PAO)
    Poet lore. 83:3 (1988:Fall) 26 
    Details
    ISSN: 0032-1966
    Topics: English, American Studies
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:3208-1988-083-03-000014
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The cost of complexity (1988)
    [s.l.] : Nature Publishing Group
    Nature 335 (1988), S. 21-22 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DURING the nineteenth century, the discovery and study of 'lost civilizations' gave great impetus to the development of archaeology. The surviving traces of such civilizations - whether in the Mycenaean and Minoan palaces of the Aegean, the frontier defences of the Roman Empire, the pyramids of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/335021a0
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Chemical aspects of host-plant specificity in threeLarrea-feeding grasshoppers (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 561-579 
    Details
    ISSN: 1573-1561
    Keywords: Creosote bush ; Larrea ; nordihydroguaiaretic acid ; grasshoppers ; monophagy ; Bootettix ; Ligurotettix ; Cibolacris ; Orthoptera ; Acrididae ; host selection ; feeding deterrence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The host-selection behavior of three species of grasshopper feeding on creosote bush,Larrea tridentata, in southern California was investigated. The species wereBootettix argentatus, which is monophagous;Ligurotettix coquilletti, oligophagous; andCibolacris parviceps, polyphagous. The monophagous species is stimulated to bite by nordihydroguaiaretic acid (NDGA), a compound that is characteristic of the host plant and that may comprise up to 10% of the dry weight of the leaf. Host specificity ofB. argentatus is enhanced by deterrent responses to compounds present in the surface waxes of all non-host-plant species. Both the oligophagous and polyphagous species are deterred by NDGA at naturally occurring concentrations. Their association withLarrea is probably based on tolerance of the plant chemicals rather than on dependence on specific chemicals. Factors other than the chemistry of the plant probably also contribute to the specificity ofB. argentatus andL. coquilletti.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01013907
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Pesticide-induced mite outbreaks: pyrethroids and spider mites (1988)
    Springer
    Experimental and applied acarology 4 (1988), S. 265-276 
    Details
    ISSN: 1572-9702
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Factors inducing outbreaks of spider mites (Acari: Tetranychidae) following use of pyrethroid insecticides are reviewed. Differentials in direct toxicity between spider mites and phytoseiid (Acari: Phytoseiidae) predators provide one explanation. Wide variation exists between pyrethroids in their direct toxicity toTetranychus urticae. The acaricidal action of pyrethroids is largely controlled by the amount of irritancy or repellency induced by the respective chemicals. Laboratory assays for repellency reflect field results. Repellent activity induces spider-mite dispersal to either recolonise plants free of residues or leave the treated habitat. Pyrethroids may also affect reproduction and development rates. Residual activity is likely to vary, so limiting any general theory of spider-mite responses to pyrethroids. Variable responses to pyrethroids, strain variation and development of behavioural resistance also add complications to understanding outbreaks. Future research needs are identified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01196190
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  • 7
    Electronic Resource
    Electronic Resource
    The fine structure of the terminal sensilla on the maxillary palps of Schistocerca gregaria (Forskål) (Orthoptera, Acrididae) (1969)
    Springer
    Cell & tissue research 99 (1969), S. 74-97 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fine structure of the terminal sensilla on the maxillary palps of Schistocerca gregaria has been investigated. Most organules include six neurons with dendrites extending to the tip of the cuticular peg, the opening of which is controlled so that the dendrites are not always exposed. The neurons are isolated from each other by a neurilemma cell and two other glial cells, while typical epidermal cells containing dense bundles of microtubules support the whole group of cells. At the poles of the neurons are specialised areas in which the cytoplasm is differentiated from that elsewhere. It contains a large number of mitochondria and small helical structures, while close to it are characteristic spheres of membranes, termed onion bodies, in various stages of development. It is suggested that the fluid bathing the distal parts of the dendrites and exuding from the tip of the peg has a number of specialised functions. It is probably concerned in forcing open the tip of the peg by hydrostatic pressure, it prevents the exposed tips of the dendrites from desiccating and it acts as a transmitter in which chemicals on the surfaces touched by the sensillum must dissolve before reaching the dendrites. This fluid may be produced by the neurilemma cell or by the neurons themselves. Closure of the pegs does not seem to produce any material reduction in the overall loss of water by the insect. Each neuron sends an axon to the brain; there is no peripheral fusion of axons. Possibly one neuron has a mechanoreceptor function, although no specialised terminal at the base of the peg has been observed. The concentration of mitochondria at either end of the neuron may be concerned in the production of action potentials, while the cavity of the peg and tormogen cell perhaps has a role in the conduction of the receptor potential to the perikaryon. Intercellular connections are such as to give mechanical stability to the cells of the organule and permit transport between the cells. Extracellular tubules extending from the wall of the peg into the cell complex may serve to anchor the peg during the moulting process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00338799
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  • 8
    Electronic Resource
    Electronic Resource
    Volume changes accompanying the thermal denaturation of deoxyribonucleic acid. I. Denaturation at neutral pH (1969)
    New York : Wiley-Blackwell
    Biopolymers 7 (1969), S. 527-537 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dilatometric measurements were made to determine the change in apparent specific volume ϕ of DNA resulting from thermal denaturation in neutral solution, ϕ increased continuously with temperature in the range 10-85°C. No deviations from a monotonically rising curve were observed in the ϕ versus temperature profile in the region of the melting temperature. The results are interpreted in terms of a partial loss of the preferentially bound DNA hydration shell. The nature of the well known buoyant density difference between native and denatured DNA was investigated by evaluating the densities in a series of cesium salt gradients at constant temperature. Extrapolation of the results to zero water activity indicates that the partial specific volumes of anhydrous native and denatured DNA are equal. The density difference at nonzero water activities is attributed to decreased hydration in the denatured state. The absence of a related change in ϕ accompanying the denaturation in the dilatometric experiments suggests that the probable volume change associated with loss of bound water during denaturation is accompanied by other compensatory volume effects. The possible nature of these volume effects is discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1969.360070410
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