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  • 2000-2004  (5)
  • 1990-1994
  • 1980-1984  (4)
  • 1900-1904
  • 2000  (5)
  • 1982  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Nail dystrophy in association with polydactyly and benign familial hypercalcaemia (2000)
    Oxford, UK : Blackwell Science Ltd
    Clinical and experimental dermatology 25 (2000), S. 0 
    Details
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2230.2000.00630.x
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  • 2
    Electronic Resource
    Electronic Resource
    Sensitivity to chemically diverse phagostimulants in a single gustatory neuron of a polyphagous caterpillar (2000)
    Springer
    Journal of comparative physiology 186 (2000), S. 13-19 
    Details
    ISSN: 1432-1351
    Keywords: Key words Catalpol ; Grammia ; Gustation ; Iridoid glycoside ; Phagostimulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Caterpillars of the arctiid moth, Grammia geneura, are polyphagous, but species of Plantago are amongst their preferred food plants. A neuron in the medial styloconic sensillum on the galea has been shown to have a general phagostimulatory function. Experiments with binary mixtures and cross-adaptation have demonstrated that it responds to some sugars, to several amino acids, and also to catalpol. Catalpol is a plant secondary compound in Plantago and a phagostimulant for the caterpillars. The possible significance of combining sensitivity to nutrient compounds with sensitivity to a secondary compound is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003590050002
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Topical tropical entomology from Africa (1982)
    [s.l.] : Nature Publishing Group
    Nature 299 (1982), S. 507-507 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Insect Science and Its Application. Editor Thomas R.Odhiambo. 4/yr. (Pergamon.) £42.50, $48.57. NOT content with founding the International Centre for Insect Physiology and Ecology (ICIPE) in Nairobi, Professor Odhiambo has now started the first international entomological journal to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/299507a0
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  • 4
    Electronic Resource
    Electronic Resource
    Herbicide Spray Drift Odor: Measurement and Toxicological Significance (2000)
    Springer
    Archives of environmental contamination and toxicology 38 (2000), S. 390-397 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract. The toxicological significance of exposure of members of the public to spray drift odors of four herbicide formulations (three 2,4-dichlorophenoxyacetic [2,4-D] acid derivatives and one MCPA [4-methyl-2-chlorophenoxyacetic acid] derivative) has been studied using a combination of novel odor measurement and classic residue analysis techniques. The mean odor concentrations, generated during the spraying of the commercial herbicide formulations under simulated aerial application conditions, were about twofold higher for 2,4-D ethylhexyl ester (22,500 OUc/m3) and MCPA (30,100 OUc/m3) than for 2,4-D butyl ester (12,400 OUc/m3) and 2,4-D amine (11,800 OUc/m3). Detailed investigations determined that the odors are due to trace manufacturing impurities and additives in the commercial formulations, whereas the herbicide active ingredients are odorless. Measured airborne herbicide active ingredient concentrations under the simulated aerial application conditions were all below their respective occupational safety and health TLV-TWA values, indicating that exposures of toxicological significance as a result of spray drift are unlikely.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002449910052
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  • 5
    Electronic Resource
    Electronic Resource
    Population structure of the wreckfish Polyprion americanus determined with microsatellite genetic markers (2000)
    Springer
    Marine biology 137 (2000), S. 1077-1090 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  We examined population structure in the wreckfish, Polyprion americanus, by assaying six microsatellite loci in 422 individuals collected throughout the geographic range. Eighteen hapuku, P. oxygeneios, were assayed at the same loci for use as an outgroup. Expected heterozygosities ranged from 0.49 to 0.88 and averaged 0.66. Allele-frequency distributions at those loci indicated that samples from the eastern North Atlantic, western North Atlantic and the Mediterranean were genetically similar, confirming the pattern seen in a previous analysis of mitochondrial DNA (mtDNA) restriction fragment length polymorphisms (RFLPs). Both mtDNA and microsatellite studies differentiated northern and southern wreckfish stocks. However, in contrast to the mtDNA studies, allelic variation at microsatellite loci clearly differentiated wreckfish from two Southern Hemisphere locations, Brazil and the South Pacific. Far more genetic variation was observed at microsatellite loci than with mtDNA RFLPs (haplotype diversity averaged 0.01), and we saw more evidence of population structure with the microsatellite loci. The differentiation between southern and northern wreckfish supports the distribution records, which indicate that wreckfish do not occur in the tropics. Temperature profiles and current patterns throughout the southern oceans apparently also prevent significant gene flow between the South Pacific and Brazilian samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270000392
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  • 6
    Electronic Resource
    Electronic Resource
    Taste Sensitivity of Insect Herbivores to Deterrents is Greater in Specialists Than in Generalists: A Behavioral Test of the Hypothesis with Two Closely Related Caterpillars (2000)
    Springer
    Journal of chemical ecology 26 (2000), S. 547-563 
    Details
    ISSN: 1573-1561
    Keywords: Heliothis virescens ; Heliothis subflexa ; caterpillar ; diet breadth ; deterrent compound ; feeding behavior ; postingestive toxicity ; plant secondary metabolite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Sensitivity of caterpillars of Heliothis virescens, a generalist, and H. subflexa, a specialist, to eight different plant secondary compounds was examined behaviorally. The compounds were nicotine hydrogen tartrate, hordenine, caffeine, sinigrin, linamarin, arbutin, chlorogenic acid, and salicin. All compounds deterred feeding, at least at the higher concentrations, but the generalist was less affected than the specialist. Thus the hypothesis that specialists have greater sensitivity to deterrents than generalists was supported. In most cases deterrence occurred on first encounter, indicating that the response was sensory; in some cases short-term postingestive effects also appeared to play a role. The larger quantities of deterrent-containing food ingested by H. virescens sometimes resulted in measurable postingestive effects during the second control test. This did not occur in H. subflexa, which more commonly rejected the deterrent-containing food on first contact. The contrast between the species is discussed in relation to tradeoffs involved in different diet breadths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005430010314
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  • 7
    Electronic Resource
    Electronic Resource
    Ethyl nicotinate (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 1299-1303 
    Details
    ISSN: 1573-1561
    Keywords: Thrips obscuratus ; Thysanoptera ; Thripidae ; attractant ; ethyl nicotinate ; apricots ; peaches
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Ethyl nicotinate was found to be a potent attractant forThrips obscuratus in peaches and apricots. The male-to-female ratio in traps was 1∶8. The chemical was more attractive than ripe fruit, with peak catches at harvest. Season-long trapping showed the efficiency of the chemical compared to unbaited traps. The chemical remained attractive for at least 2 weeks when 50 μl were placed in open 2-ml vial caps. Various pyralids, geometrids (Lepidoptera), and chironomids (Diptera) were also attracted in low numbers to ethyl nicotinate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987763
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  • 8
    Electronic Resource
    Electronic Resource
    Serum ferritin and binding of serum ferritin to concanavalin A as a tumor marker in patients with primary liver cell cancer and chronic liver disease (1982)
    Springer
    Digestive diseases and sciences 27 (1982), S. 111-116 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Total ferritin concentration was measured in sera of 30 patients with primary liver cell cancer (PLCC) and 33 patients with cirrhosis and compared with serum alpha-fetoprotein levels as a diagnostic marker of PLCC. Serum ferritin concentration was raised in 19 patients (63%) with PLCC and 11 patients (33%) with cirrhosis. The median level was significantly higher (P〈0.001) in the PLCC group (560 μg/liter) than in the cirrhotic group (137 μg/liter), although there was considerable overlap. Serum ferritin was posititively correlated with serum aminotransferase levels in the cirrhotic patients (r=0.53,P〈0.001), reflecting hepatic necrosis, but not in the PLCC patients. The concentration of ferritin binding to concanavalin A was measured in the sera of patients with elevated total serum ferritin. Although the proportion of bound ferritin was decreased in the majority of PLCC sera compared to controls (P〈0.001), there was overlap with the cirrhotic group, making it unlikely that this assay is useful in distinguishing a tumor-specific isoferritin. Serum alpha-fetoprotein levels were elevated in 21 patients (70%) with PLCC and proved to be a highly sensitive and specific test for PLCC. There was no relationship between the alpha-fetoprotein and serum ferritin concentrations. Serum ferritin is inferior to alpha-fetoprotein as an initial screening test for PLCC, but in alpha-fetoprotein-negative patients serum ferritin may have a role in monitoring therapy. Patients with cirrhosis with normal serum alpha-fetoprotein and ferritin concentrations are very unlikely to have PLCC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01311703
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  • 9
    Electronic Resource
    Electronic Resource
    Hepatic iron stores and markers of iron overload in alcoholics and patients with idiopathic hemochromatosis (1982)
    Springer
    Digestive diseases and sciences 27 (1982), S. 909-916 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Liver iron concentrations were determined in 60 alcoholics with liver disease of varying severity, 15 patients with untreated idiopathic hemochromatosis, and 16 control subjects with biliary tract disease. Mean liver iron concentrations (μg/100 mg dry weight) were significantly greater in the alcoholics (156.4±7.8 (sem);P〈0.05) and in patients with idiopathic hemochromatosis (2094.5±230.7;P〈0.01) than in control subjects (53.0±7.0). Liver iron concentrations of 〉140 μg/100 mg were found in 17 alcoholics (29%) and in all 15 patients with idiopathic hemochromatosis. Liver iron concentrations 〉1000 μg/100 mg were found in all patients with idiopathic hemochromatosis but in none of the alcoholics. In the alcoholics no relationship existed between liver iron concentrations and the amount of alcohol consumed daily, the length of the drinking history, the amount of beverage iron consumed daily, or the severity of the liver disease. Serum ferritin concentrations reflected iron stores in patients with hemochromatosis and in alcoholics with minimal liver disease. However, in alcoholics with significant liver disease serum ferritin concentrations did not reflect iron stores accurately, although with normal values iron overload is unlikely. Serum iron concentration and percentage saturation of total iron-binding capacity were of little value in assessing iron status in either alcoholics or patients with hemochromatosis. Measurement of the liver iron concentration clearly differentiates between alcoholics with significant siderosis and patients with idiopathic hemochromatosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01316575
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