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  • 1
    Electronic Resource
    Electronic Resource
    Changes of species specific cuticular hydrocarbon profiles in the cockroaches Nauphoeta cinerea and Leucophaea maderae reared in heterospecific groups (1997)
    Springer
    Entomologia experimentalis et applicata 85 (1997), S. 145-150 
    Details
    ISSN: 1570-7458
    Keywords: Dictyoptera ; Oxyhaloinae ; artificial heterospecific colonies ; cuticular hydrocarbons ; chemical signature ; interspecific recognition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The cuticular hydrocarbon profiles of the cockroaches Nauphoeta cinerea and Leucophaea maderae are species-specific when maintained in homospecific rearings. When individuals were reared in mixed species colonies, they initially remained in homospecific groups under different shelters. However, after 14 days they formed one heterospecific group with cuticular profiles showing characteristics of both species. When individuals were returned in monospecific rearings, their cuticular hydrocarbon profiles returned to species-specific ones within 3 weeks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003021524525
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  • 2
    Electronic Resource
    Electronic Resource
    Pheromonal emission during the mating behavior ofEurycotis floridana (Walker) (Dictyoptera: Blattidae) (1996)
    Springer
    Journal of insect behavior 9 (1996), S. 197-213 
    Details
    ISSN: 1572-8889
    Keywords: sexual behavior ; sex pheromones ; cockroach ; Eurycotis floridana
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The sexual behavior of males and females ofEurycotis floridana was investigated and the various associated behavioral sequences are described. Olfactometer data proved that the male produces a volatile sex pheromone attractive at a distance to conspecific females. The male initiates courtship behavior by exposing the glandular areas on the anterior parts of abdominal tergites 2, 7, and 8. This male calling behavior was observed throughout the day. The males can mate when 8 days old, whereas virgin females are sexually receptive 18 days after becoming adults. Once attracted near the male, the female opens her genital atrium and climbs on the back of the male, where she feeds on the glandular secretions that oozed around a little tuft of setae on the first tergite. These setae are mechanoreceptors and they are stimulated when licked by the females, which informs the male that she is in a proper position for copulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02213865
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  • 3
    Electronic Resource
    Electronic Resource
    Le grégarisme chezdysdercus cingulatus Fabr. (Heteroptera, Pyrrhocoridae): nouvelle méthode d'interprétation statistique (1984)
    Springer
    Insectes sociaux 31 (1984), S. 277-290 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary Aggregations ofDysdercus cingulatus frequently occur in nature. The experimental study of insect gregariousness is often difficult to explain with statistical measurements, therefore an original method has been tested with a microcomputer. Besides, the importance of thigmotactism and of olfactory stimuli has been shown. The results are analysed and discussed.
    Notes: Resume Les regroupements deDysdercus cingulatus sont fréquents dans la nature. L'étude expérimentale du grégarisme chez les insectes étant souvent difficile à interpréter statistiquement, une méthode originale a été expérimentée par micro-ordinateur. D'autre part, l'importance du thigmotactisme et des stimuli olfactifs a été mis en évidence. Les résultats obtenus sont analysés et discutés.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02223612
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  • 4
    Electronic Resource
    Electronic Resource
    Male dominant/subordinate relationships, cuticular profiles and sex pheromone in Nauphoeta cinerea (Dictyoptera, Blaberidae) (1997)
    Springer
    Insectes sociaux 44 (1997), S. 277-287 
    Details
    ISSN: 1420-9098
    Keywords: Key words:Nauphoeta cinerea, dominance, sex pheromone, cuticular profiles.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: In the cockroach Nauphoeta cinerea, male-male aggressive interactions result in dominant-subordinate relationships. Once dominance relationships are established, a male can recognize the status of another individual, likely through chemical cues. The aim of this study was to determine the effect of these male-male interactions on cuticular chemical profiles and on the relative composition of the male sex pheromone. The results of chemical analyses of males reared in pairs for 30 days clearly showed significant differences in both cuticular profiles and sex pheromone of dominant and subordinate individuals. The possible role of these compounds as recognition cues was discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000400050048
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  • 5
    Electronic Resource
    Electronic Resource
    Morphology of the male and female tergal glands of the woodroach Cryptocercus punctulatus (Insecta, Dictyoptera) (1989)
    Springer
    Zoomorphology 109 (1989), S. 153-163 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Males and females of Cryptocercus punctulatus possess tergal glands which differ in position, size, morphology, and chemical composition of their secretions. Ultrastructural studies reveal the presence of class 1 and class 3 glandular units interspersed throughout the glands; class 3 glandular units are 30 times as numerous as in the female, but no cytological difference was found between the sexes. The morphology of the tergal glands is characterized by the occurrence of a subcuticular space reservoir, a dense tracheal system, and a thick collagenous layer instead of the typical basement membrane. Comparison with the termite abdominal gland system indicates a great similarity in the fine structure. The biological function of the tergal glands is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00312267
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  • 6
    Electronic Resource
    Electronic Resource
    Apoptosis and oxidative status in peripheral blood mononuclear cells of diabetic patients (1999)
    Springer
    Apoptosis 4 (1999), S. 263-270 
    Details
    ISSN: 1573-675X
    Keywords: Apoptosis ; B/T blood lymphocytes ; γ-glutamyltransferase ; glutathione ; glutathione S transferase ; membrane permeability ; type I (IDDM) ; type II (NIDDM) diabetes.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We have compared the concentrations of intracellular glutathione (GSH), glutathione-dependent antioxidative enzymes, the cell death rate and immunophenotype profile of peripheral blood mononuclear cells (PBMC) from healthy donors and from patients with insulin-dependent type I (IDDM) or non insulin-dependent type II (NIDDM) diabetes mellitus. The IDDM and NIDDM patients had above-normal absolute lymphocyte counts, whereas the percentages of CD3, CD4 and CD8 T lymphocytes were significantly reduced. In contrast, the absolute number and percentage of B lymphocytes was higher in diabetic patients than in healthy donors. The low intracellular reduced glutathione (GSH) and the unbalanced profile of key enzymes involved in GSH metabolism, gamma glutamyltransferase (γ-GT) and glutathione-S-transferase (GST), account for the increased oxidative status of PBMC from diabetic patients. The plasma membranes of PBMC from diabetic patients were less permeable to propidium iodide than those of PBMC from healthy donors, indicating that the apoptotic cell death rate was lower in the cells from diabetic patients. These differences are potentially useful markers of pathogenic metabolic changes which occur during clinical diabetes and if they are confirmed could be used to identify the onset of diabetes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026408409916
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  • 7
    Electronic Resource
    Electronic Resource
    Calcium Dobesilate protects human peripheral blood mononuclear cells from oxidation and apoptosis (1998)
    Springer
    Apoptosis 3 (1998), S. 41-49 
    Details
    ISSN: 1573-675X
    Keywords: Acivicin ; antioxidants ; apoptosis ; Calcium Dobesilate ; Doxium ® ; deoxyribose ; γ-glutamyltransferase ; glutathione ; glutathione S-transferase ; human peripheral blood mononuclear cells ; lipid peroxidation ; membrane permeability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The antioxidant effects of Calcium Dobesilate (CD, Doxium ®) were investigated in relation to the oxidative status, apoptosis and in vitro proliferation of human peripheral blood mononuclear cells (PBMC) isolated from healthy donors. CD alone did not modify cell growth in vitrountil 10 μM. This molecule counteracted oxidative damages generated by the high reducing sugar dR and was shown to reduce apoptosis by delaying both membrane permeability changes and DNA fragmentation. CD 10 μM affected in a time-dependent dynamics several parameters representative of the cellular oxidative status. In particular, CD significantly increased the activity of glutathione S-transferase (GST) after three days of treatment and also, but to a lower extent, the activity of γ-glutamyltransferase (γ-GT). Both enzymes are known to be involved in the glutathione (GSH) metabolic cycle. This enzymatic behaviour was reversed at seven days of treatment, with a significant GST decrease and a γ-GT activation. After seven days of CD exposure, the intracellular GSH content was enhanced and this resulted in a dramatic decrease in lipid peroxidation, underlining the powerful antioxidant properties of CD in human PBMC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009659119635
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  • 8
    Electronic Resource
    Electronic Resource
    Chemistry of pheromonal and defensive secretions in the nymphs and the adults ofDysdercus cingulatus Fabr. (Heteroptera, Pyrrhocoridae) (1992)
    Springer
    Journal of chemical ecology 18 (1992), S. 65-76 
    Details
    ISSN: 1573-1561
    Keywords: Dysdercus cingulatus ; Heteroptera ; Pyrrhocoridae ; exocrine glands ; pheromones ; bug ; aggregation ; allomones ; cotton stainer ; defensive secretions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The exocrine secretions from the nymphs and the adults of both sexes inD. cingulatus were chemically investigated. Seven compounds were identified in the anterior glands, and eleven in the median dorsoabdominal glands of nymphs and adults of both sexes. Fifty-five compounds were identified in the defensive glands (34 in posterior dorsoabdominal glands ofnymphs and 21 in metathoracic glands of adults), and six in the sternal glandular epithelium of the males. The biological function of the glandular secretions and of their identified compounds were investigated and are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00997165
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  • 9
    Electronic Resource
    Electronic Resource
    Tergal glands of male and femaleCryptocercus punctulatus scudder (Dictyoptera: Cryptocercidae): Composition, sexual dimorphism, and geographic variation of secretion (1991)
    Springer
    Journal of chemical ecology 17 (1991), S. 823-831 
    Details
    ISSN: 1573-1561
    Keywords: Glandular secretions ; Cryptocercus punctulatus ; Dictyoptera ; Cryptocercidae ; linalyl acetate ; 4,6,8-trimethyl-7,9-undecadien-5-ol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Males and females ofCryptocercus punctulatus possess tergal glands, but they differ in position, size, morphology, and secretion chemistry. Compound A (linalyl acetate) is the most abundant of the 21 compounds found only in the secretion of these glands. Compound B, 4,6,8-trimethyl-7,9-undecadien-5-ol, is specific to the tergal secretion of females.C. punctulatus lives only in the United States; its distribution is disjunct. Compound A is found in samples from the eastern population but is absent in samples from the western population. The amount of compound B per gland in samples from the western population is at least twice as high as in the samples from the eastern populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01395593
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  • 10
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    Measurement of the rate of ν e+d → p+p+e − interactions produced by 8B solar neutrinos at the Sudbury Neutrino Observatory (2002)
    Springer
    Details
    Publication Date: 2002-12-01
    Print ISSN: 1063-7788
    Electronic ISSN: 1562-692X
    Topics: Physics
    Published by Springer
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