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  • 1
    Electronic Resource
    Electronic Resource
    Sociobiological studies of the polygynic antLasius sakagamii II. Production of colony members (1982)
    Springer
    Insectes sociaux 29 (1982), S. 164-174 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Resume ChezLasius sakagamii, le taux de reproduction est en relation avec la densité des reines dans chaque nid. Dans les nids à forte densité de reines, le développement des ovaires et le taux de ponte de chaque reine sont plus faibles que dans les autres nids, alors que le nombre des œufs dans chaque nid est plus élevé. En général, dans les nids à très forte densité de reines (plus du 25 reines par mètre carré de nid) ou avec des faibles rapports ouvrières/reine (moins de 5 000 ouvrières pour une reine), aucune reine ailée n'est produite. C'est aussi le cas des nids où les rapports larves/ouvrière sont élevés (plus de 5 larves par ouvrière). D'autre part, la production des ouvrières et des mâles est plus grande dans les nids à forte densité de reines que dans ceux où la densité de celle-ci est faible.
    Notes: Summary The reproduction rate ofL. sakagamii is related to the queen density in each nest. In nests with higher queen densities, the ovarian development and the egg-laying rate of each queen is lower, though the number of eggs produced per nest is larger. In general, in nests with very high queen densities (more than about 25 queens per square meter of nest) or low worker/queen ratios (less than about 5,000 workers per queen), no alate queens are produced. Further, nests with high larva/worker ratios (more than about 5 larvae per worker) also produce no alate queens. On the other hand, the production of workers and males is larger in nests with high queen densities than in those with low queen densities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02228749
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  • 2
    Electronic Resource
    Electronic Resource
    Unique habits of stomodeal trophallaxis in the ponerine antHypoponera sp. (1995)
    Springer
    Insectes sociaux 42 (1995), S. 137-144 
    Details
    ISSN: 1420-9098
    Keywords: Stomodeal trophallaxis ; Ponerinae ; ergatoid male ; ergatoid queen ; Hypoponera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The present paper describes for the first time that adult-to-adult trophallaxis exists in ponerine ants. Furthermore, it shows that the adult castes of the ponerine andHypoponera sp. have different habits of trophallaxis. Workers display a soliciting behavior toward queens, males and workers, but receive regurgitated food only from workers. The workers are forced to stop soliciting for regurgitated food by the “whipping behavior” of the queen. Callow queens solicit regurgitated food from workers and ergatoid males and receive it, while mature queens do not solicit regurgitation from workers. Ergatoid males receive regurgitated food from workers and regurgitate it to queens. Alate males show no trophallactic food exchange with workers and queens. Trophallactic behavior was never observed between males of either winged or ergatoid types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242450
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  • 3
    Electronic Resource
    Electronic Resource
    The caste system of the dolichoderine antTechnomyrmex albipes (Hymenoptera: Formicidae): morphological description of queens, workers and reproductively active intercastes (1991)
    Springer
    Insectes sociaux 38 (1991), S. 413-422 
    Details
    ISSN: 1420-9098
    Keywords: Castes ; reproductive intercastes ; supplementary reproductives
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Females ofTechnomyrmex albipes consist of winged queens, intercastes and workers. In established colonies, reproduction is performed by many intercastes (wingless females which have intermediate phenotypes between queen and worker characters). Dissection and morphological examination revealed that intercastes had a spermatheca, but workers did not. Intercastes can be divided into three classes: major intercastes with three ocelli, medium intercastes with one ocellus, and minor intercases without ocelli. Workers have no ocelli. The thoracic structure of intercastes gradually becomes more complex from minors to majors. The body size of intercastes gradually increases from minors to majors, and so does the number of overioles. The body size distributions of minor intercastes and workers overlap considerably, but the distributions of ovariole numbers overlap less. Winged queens had distinctly larger body sizes, more ovarioles and larger spermathecae than intercastes. Most intercastes were inseminated with developed ovaries and appeared to reproduce. The caste system and reproductive division of labour inT. albipes is compared to those of ant species in which permanently wingless females reproduce.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01241875
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  • 4
    Electronic Resource
    Electronic Resource
    Frequent occurrence of gynandromorphs in the natural population of the antVollenhovia emeryi (Hymenoptera: Formicidae) (1994)
    Springer
    Insectes sociaux 41 (1994), S. 273-278 
    Details
    ISSN: 1420-9098
    Keywords: Vollenhovia emeryi ; gynandromorph ; dimorphism ; microgyna ; polygyny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Many gynandromorphs were obtained from the natural population ofVollenhovia emeryi (microgyna form) in Gifu, Japan. They were primarily male: most had the thorax and gaster of males, and the head contained tissues partially feminized to varying degrees. These gynandromorphs were found in 27 of 45 colonies studied (60.0%). Their proportion to total males in each colony varied from 3.7–47.7%, with a mean of 21.4% (n = 21). The gynandromorphs were found in all study areas and in every study year, suggesting that gynandromorphism in this species is not a rare phenomenon. Moreover, this observation suggests that gynandromorphs may occur more frequently in micraners than in macraners.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242298
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  • 5
    Electronic Resource
    Electronic Resource
    Production of females by parthenogenesis in the ant,Cerapachys biroi (1995)
    Springer
    Insectes sociaux 42 (1995), S. 333-336 
    Details
    ISSN: 1420-9098
    Keywords: Parthenogenesis ; worker reproduction ; thelytoky ; Cerapachyinae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Groups of virginCerapachys biroi workers produced females (workers) in the laboratories. This is the first report of thelytoky in Cerapachyinae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01240430
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  • 6
    Electronic Resource
    Electronic Resource
    Dimorphic ergatoid males and their reproductive behavior in the ponerine antHypoponera bondroiti (1996)
    Springer
    Insectes sociaux 43 (1996), S. 119-130 
    Details
    ISSN: 1420-9098
    Keywords: Hypoponera bondroiti ; ergatoid male ; intercaste ; dimorphism ; mating strategy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We studied the reproductive behavior of the ponerine antHypoponera bondroiti from Okinawa, Japan. This species has dimorphic wingless ergatoid males (major and minor), dimorphic reproductive females (alate queens and wingless reproductive intercastes), and workers. Workers have neither ovarioles nor spermatheca. Major ergatoid males are the largest colony members. Two major males fought one another in the nest until one disappeared, leaving the other to occupy the nest chambers where queens emerge and mate. Minor ergatoid males also fought one another, although they seemed to be less pugnacious, resulting in occasional cohabitation of multiple minor males in the same nest chamber. Major males never attacked minor ones, allowing them to coexist in the same nest chamber. Minor males seemed to mimic females. Both major and minor males mated with both alate queens and intercastes within the nest. After mating, some alate queens shed their wings and remained in the nest, while the others left the nest for dispersal in the laboratory. Intercastes remained in the nest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242564
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  • 7
    Electronic Resource
    Electronic Resource
    Symptomatic intracranial haemorrhage in acute nonlymphoblastic leukaemia: analysis of CT and autopsy findings (1997)
    Springer
    Journal of neurology 244 (1997), S. 94-100 
    Details
    ISSN: 1432-1459
    Keywords: Key words Subcortical brain ; haemorrhage ; Subarachnoid ; haemorrhage ; Computed ; tomography ; Acute ; nonlymphoblastic leukaemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We studied the CT and autopsy findings in patients with symptomatic intracranial haemorrhage (ICH) in acute nonlymphoblastic leukaemia (ANLL). From 1982 to 1994, 38 (20%) of 194 patients with ANLL were diagnosed as having ICH, by CT in 17 patients, by autopsy in 11 and by both examinations in 10. Intracerebral haemorrhage occurred in 30 patients. Twenty-four patients with subcortical haemorrhage were classified into three types: a single haematoma (7), clustered multifocal haematomas (11), and separated multifocal haematomas (6). Subarachnoid haemorrhage (SAH) occurred in 22 patients; 15 with subcortical haemorrhage, 1 with subdural haemorrhage (SDH) and 6 without any other ICH. SDH was also found in 4 patients with parenchymal haemorrhage or SAH or both. Concurrent, multiple haemorrhages consisting of various combinations of intracerebral haemorrhage, SAH and SDH are characteristic of ICH in ANLL. Multiple or confluent haematomas occur preferentially in subcortical brain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004150050056
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  • 8
    Electronic Resource
    Electronic Resource
    Lack of a kinetic interaction between fluconazole and mexiletine (1996)
    Springer
    European journal of clinical pharmacology 50 (1996), S. 129-131 
    Details
    ISSN: 1432-1041
    Keywords: Key words Fluconazole ; Mexiletine; CYP1A2 ; drug interaction ; metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract. Objective. To investigate the effect of fluconazole on the kinetics of mexiletine. Methods. Six healthy male volunteers participated in a crossover study. On the 1st day, the subjects received 200 mg mexiletine alone. On days 2–7 they received 200 mg fluconazole orally, and on day 8 they received 200 mg mexiletine and 200 mg fluconazole concomitantly. In a third phase two subjects received 400 mg fluconazole daily. Results. No differences in concentrations were observed between the three phases. The area under the concentration curves (AUC) after administration of mexiletine alone and in combination with fluconazole 200 mg/day were 6.63 and 7.31 μg ⋅ h ⋅ ml−1, respectively. Conclusion. These findings suggest that fluconazole does not inhibit mexiletine metabolism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002280050080
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  • 9
    Electronic Resource
    Electronic Resource
    Cytochrome P450 in livers of diabetic rats: Regulation by growth hormone and insulin
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 268 (1989), S. 567-575 
    Details
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-9861(89)90324-X
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  • 10
    Electronic Resource
    Electronic Resource
    Archaebacterial lipid models: formation of stable vesicles from single isoprenoid chain-amphiphiles
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 1193 (1994), S. 41-47 
    Details
    ISSN: 0005-2736
    Keywords: Archaebacterium ; Fast atom bombardment mass spectrometry ; Liposome ; Membrane morphology ; NMR, ^1H- ; Surfactant
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2736(94)90330-1
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