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  • 1
    Electronic Resource
    Electronic Resource
    An inversion within the subterminal inversion inDrosophila ananassae (1983)
    Springer
    Cellular and molecular life sciences 39 (1983), S. 99-100 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary An inversion within the subterminal inversion in 2L ofDrosophila ananassae has been detected in a laboratory strain originating from Kuala Lumpur, Malaysia. The break points of inversion have been located in the reference map of salivary chromosomes. The data on the frequencies of different karyotypes indicate that inversion heterozygotes exhibit heterosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01960651
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  • 2
    Electronic Resource
    Electronic Resource
    The antennae and mating behaviour ofDrosophila females (1982)
    Springer
    Cellular and molecular life sciences 38 (1982), S. 237-238 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The females ofDrosophila bipectinata andD. malerkotliana are able to discriminate between their own and alien males in the absence of antennae. Thus mate recognition seems to depend on contact chemoreceptors in these 2 species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01945086
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  • 3
    Electronic Resource
    Electronic Resource
    One-sided sexual isolation betweenDrosophila takahashii andDrosophila pseudotakahashii (1982)
    Springer
    Cellular and molecular life sciences 38 (1982), S. 318-318 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In order to elucidate the phylogenetic relationships betweenD. takahashii andD. pseudotakahashii, 2 closely related allopatric species, sexual isolation was studied by the male-choice method. The present data indicate that there is a one-sided mating preference between these species. On a basis of the results, their evolutionary sequence is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01949365
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Cardiac and respiratory responses in the climbing perchAnabas testudineus (1973)
    Springer
    Journal of comparative physiology 84 (1973), S. 205-226 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The heart rate ofAnabas is about 40 beats/min when breathing water and air. Tachycardia occurs as the fish takes an air breath and the rate declines as the breath holding continues but water breathing stops. Bradycardia is observed during this later phase. By the time the next air breath is taken, the heart rate has dropped to 15–30 beats/min. The heart rate of a fish breathing normoxic water but prevented from surfacing is about 42/min. Bradycardia occurs in hypoxic water under similar conditions. Tachycardia is observed in active fish when breathing hypercarbic water and air. On exposure to air bradycardia is found in resting fish but tachycardia occurs during activity. In air,Anabas usually repeats a breath when the heart rate drops to 15–25 beats/min. Tachycardia occurs immediately following an air breath. Heart rate then returns over a period of 3–6 mins to the normal resting level of 30 beats/min. The gas composition of the suprabranchial chambers has been measured and its relationship with the occurrence of an air breath, tachycardia and bradycardia is described. The experimental results are discussed in relation to the anatomy of the blood supply to the respiratory organs. The possible role of respiratory gases and pH in the control of breathing and perfusion is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697607
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  • 5
    Electronic Resource
    Electronic Resource
    Occurrence and Nature of an Amœba Excystment Factor produced by Aerobacter sp. (1956)
    [s.l.] : Nature Publishing Group
    Nature 177 (1956), S. 621-622 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Crump1 showed that excystment in Amoeba Z (Didascalus ihorntoni ; Singh6) took place without the presence of bacteria, while Amoeba 4 (Schizo-pyrenus russelli; Singh6) excysted only in the presence of certain bacteria (Aerobacter sp. and 4036). She suggested that the two species of bacteria produce ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/177621a0
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  • 6
    Electronic Resource
    Electronic Resource
    Dissolved Carbon Dioxide and the Ripening of Tomatoes (1936)
    [s.l.] : Nature Publishing Group
    Nature 137 (1936), S. 704-705 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE phenomenon of climacteric rise in respiration of ripening fruits is not fully understood. Blackman and Parija1 explained the rise in respiratory activity in apples on the assumption that in the senescent stage a lowering of “hydrolysis-resistance” occurs leading to a greater ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/137704a0
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  • 7
    Electronic Resource
    Electronic Resource
    A Culture Method for Growing Small Free-Living Amœbæ for the Study of their Nuclear Division (1950)
    [s.l.] : Nature Publishing Group
    Nature 165 (1950), S. 65-66 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE genera and species among the small free-living, intestinal and parasitic amoebae have been largely created by previous workers on the basis of their nuclear structure and their mode of nuclear division. A review of the literature on the nuclear division in small free-living amoebae clearly ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/165065a0
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  • 8
    Electronic Resource
    Electronic Resource
    Nuclear Division in AmŒbÆ and its Bearing on Classification (1951)
    [s.l.] : Nature Publishing Group
    Nature 167 (1951), S. 582-584 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the past, the order Amoebida Calkins has been divided into families on such characters as the presence of a flagellate stage under certain physiological conditions, their parasitic or free-living nature, the possession of an accessory body called Neben-korper, etc. Such a system is not based on ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/167582a0
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  • 9
    Electronic Resource
    Electronic Resource
    Toxic Effects of Certain Bacterial Metabolic Products on Soil Protozoa (1942)
    [s.l.] : Nature Publishing Group
    Nature 149 (1942), S. 168-168 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE chemotherapeutic value of the antibacterial substances produced by micro-organisms has attracted much attention in recent years. Very little is known concerning the effect of these antibacterial substances on Protozoa. For the past few years I have carried out work1,2,3 on ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/149168a0
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of Centrifuging on Amæba proteus ( Y ) (1937)
    [s.l.] : Nature Publishing Group
    Nature 139 (1937), S. 675-675 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN Amæba proteus, the cytoplasmic bodies are the nutritive spheres, crystals, neutral red bodies, mitochondria, sudanophil fat and a single contractile vacuole. Fig. 1 illustrates the stratification of the various cytoplasmic components according to their specific gravity after ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/139675a0
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