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  • 1
    Electronic Resource
    Electronic Resource
    Antennale Rezeptoren für Queen Substance und Sterzelduft bei der Honigbiene (1968)
    Springer
    Journal of comparative physiology 59 (1968), S. 357-361 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Auf den Antennen aller drei Kasten von Apis mellifica konnten elektrophysiologisch 2 Typen von Riechzellen identifiziert werden, die auf Pheromone der Biene antworten. Der eine Typ ist auf Queen substance (9-Oxo-trans-2-decensäure), der andere auf den Sterzelduft der Arbeiterin spezialisiert. Beide Zelltypen werden bei Ableitungen von Porenplatten gefunden.
    Notes: Summary Electrophysiologically, we could identify two types of olfactory receptor cells, which respond to pheromones of the honeybee. These cells are associated with the poreplates on the antennae of all three castes of Apis mellifica. One of the cell types is specialized for the queen substance (9-oxo-trans-2-decenoic acid) while the other responds to the scent of the Nasanov gland.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00365967
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  • 2
    Electronic Resource
    Electronic Resource
    Daily protein synthesis in the pars intercerebralis and corpora allata ofApis mellifica L. with and without training to a foraging schedule (1977)
    Springer
    Journal of comparative physiology 118 (1977), S. 51-60 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The rate of protein synthesis by the neurosecretory cells in the pars intercerebralis and in the corpora allata was determined by autoradiography. Bees that forage throughout the day display a daily rhythm in that rate; the synthesis curve could be shifted considerably in each of two different training experiments. The total amount of protein synthesized per day is distinctly greater for bees that collect all day than for those with activity limited by the training schedule. The corpora allata also exhibit a daily rhythm in protein synthesis, and this too can be altered by training. The relationship to collecting activity are less clear than in the case of the pars intercerebralis, but are similar in direction of shift.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00612336
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  • 3
    Electronic Resource
    Electronic Resource
    Die Mantelpapillen und Stacheln vonAcanthochiton fascicularis L. (Mollusca, Polyplacophora) (1980)
    Springer
    Zoomorphology 94 (1980), S. 121-131 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Struktur und Ultrastruktur der Papillen im Mantelepithel der PolyplacophoreAcanthochiton fascicularis werden beschrieben. Sie bestehen zu einem gro\en Teil aus Sekretzellen. In vielen Papillen sind Sehzellen vorhanden. Die Papillen bilden einen bis mehrere Stacheln aus. Ein organischer Becher verbindet den Kalkstachel mit einer Stachelzelle, hÄufig noch mit einer zweiten Zelle, die distal eine Cilie trÄgt. Sie sind Tastrezeptoren. Andere Stacheln dienen lediglich der Abwehr; sie können durch Muskeln bewegt werden. Diese Stacheln wachsen stÄndig basal nach, wÄhrend die Taststacheln nach einiger Zeit abgesto\en und durch neu von der Papille gebildete ersetzt werden. Ästheten und Mantelpapillen sind homologe Orgame.
    Notes: Summary Structure and ultrastructure of the papillae in the mantle epithelium of the polyplacophoranAcanthochiton fascicularis are described. They consist to a major part of various secretory cells. Visual cells occur frequently in the papillae. Each of these organs form up to a few spines which have basally a cup of organic material. This connects the calcareous spine with the spine cell and often with a second cell which has distally one cilium. They are tactile receptors. Other spines are only for the defense and can be moved by muscles. They continue to grow basally in contrast to the tactile spines which are pushed off after some time and replaced by new ones formed in the papillae. The aesthetes and the mantle papillae are homologous organs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081929
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  • 4
    Electronic Resource
    Electronic Resource
    The ocellus of the cockroach, Periplaneta americana (Blattariae) (1976)
    Springer
    Cell & tissue research 168 (1976), S. 209-222 
    Details
    ISSN: 1432-0878
    Keywords: Ocellus ; Periplaneta americana ; Retinular cells ; Endoplasmic reticulum ; Multitubular body
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ocelli of Periplaneta americana were studied by light and electron microscopy. The view that the ocellus of the cockroach represents a degenerated structure can no longer be supported. All organelles necessary for function are present. The club-shaped retinular cells lie homogeneously distributed in the cupule of the ocellus. Rhabdoms are seen as sickle-, y-, x-or star-shaped structures with up to six cells in formation. Cells were found which had formed two rhabdomeres. The mass of cell organelles lies in the cytoplasm between the cell nucleus and the rhabdom. Smooth endoplasmic reticulum is wound into a spindle formation of considerable size at the origin of the axon in some cells. A cylindrical body in which 10–40 microtubules are packed, as yet unknown in insect retinular cells, is described. The receptory area of the ocellus terminates in a tapetum which contains granules, soluble in alcohol. The axon bundles of the retinular cells run through the tapetum and immediately thereafter make synaptic contact with dendrites of the ocellar nerve cells, while still within the ocellus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215878
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  • 5
    Electronic Resource
    Electronic Resource
    Die Bedeutung des Sekretes der Tergittaschendrüsen für die Attraktivität der Bienenkönigin gegenüber jungen Arbeiterinnen (1977)
    Springer
    Behavioral ecology and sociobiology 2 (1977), S. 185-200 
    Details
    ISSN: 1432-0762
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1. Die biologische Bedeutung des Sekrets der Tergittaschendrüsen der Bienenkönigin wurde mit Hilfe neu entwickelter quantitativ auswertbarer Verhaltenstests untersucht. 2. Das Sekret der Taschendrüsen wirkt stark anlockend auf junge Arbeits-bienen. Es entfaltet seine volle Wirksamkeit allerdings nur gemeinsam mit dem Mandibeldrüsensekret: Das Sekret der Mandibeldrüsen wirkt anlockend über eine Distanz von mehreren Zentimetern, das Produkt der Taschendrüsen nur dann, wenn die Arbeitsbienen Fühlerkontakt mit dem Duftstoffträger aufnehmen können (Kontaktchemorezeption). Das Taschendrüsensekret scheint die “Hofstaatbildung” zu stabilisieren. 3. Chemische Untersuchungen ergaben, daβ im Taschendrüsensekret ähnlich wie im Sekret der Mandibeldrüse mehrere Pheromone zusammen für die Lockwirkung verantwortlich sind. 9-Oxodecensäure ist im wirksamen Pheromonkomplex der Taschendrüsen nicht enthalten.
    Notes: Summary 1. The biological significance of the tergit gland (Tergittaschendrüse) secretion of the queen honeybee was quantitatively bioassayed. 2. Young worker bees are strongly attracted to the abdominal gland secretion. However, it only becomes completely effective together with the mandibular gland secretion: the mandibular gland secretion attracts at distances beyond several centimetres, whereas that of the abdominal gland only if the workers make direct contact (contact chemoreception) with the pheromone source. The abdominal gland secretion appears to stabilize the “court”. 3. Chemical investigations revealed that in the abdominal gland secretion—as well as in that of the mandibular gland-several pheromones together are responsible for the attraction effect. The active pheromone complex of the abdominal gland does not contain 9-oxo-decenoic acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00361901
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  • 6
    Electronic Resource
    Electronic Resource
    Die rolle des taschendrüsenpheromons beim Hochzeitsflug der Bienenkönigin (1977)
    Springer
    Behavioral ecology and sociobiology 2 (1977), S. 329-338 
    Details
    ISSN: 1432-0762
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1. Es wird eine Methode beschrieben die es erlaubt, sowohl die Wirkung der 9-Oxodecensäure als auch die des Taschendrüsensekretes der Bienenkönigin auf die Drohnen quantitativ zu erfassen und klar voneinander zu trennen. 2. Für die Anlockung der Drohnen aus gröβerer Entfernung bis zu 50m und mehr ist, wie schon Butler 1971 zeigen konnte die 9-Oxodecensäure verantwortlich. 3. Das Pheromon der Taschendrüsen ist dagegen nur im Nahbereich der Königin wirksam, hier aber überwiegt seine Attraktivität, die der 9-Oxodecensäure deutlich. Es erhöht auβerdem die Kopulationsbereitschaft der Bienenmännchen: Drohnen, die mit Taschendrüsensekret benetzten Objekten von geeigneter Form und Gröβe nahekommen, versuchen in jedem Fall sie zu erfassen und sich damit zu verpaaren. Verwendet man Papierröllchen von etwa 3 mm Durchmesser, kopulieren die Drohnen fast ausnahmslos schon nach wenigen Minuten damit.
    Notes: Summary 1. A new bioassay has been used to study quantitatively the biological significance of both the 9-oxodecenoic acid and the tergit gland secretion of the honeybee queen to drones. By this method it is possible to analyze clearly the different effects of these secretions to drones. 2. As already demonstrated by Butler (1971) drones are attracted by 9-oxodecnoic acid from distances of 50 m and more. 3. The pheromone of the tergit glands is effective, close up to the queen only; within short distances (less than 30 cm) its attractiveness predominates. Moreover, it increases the copulation activity: if drones approach objects of appropriate shape and size which are sprinkled with tergit gland secretion they try to seize and to copulate with them. If small paper tubes of about 3 mm in diameter are used as lures, the drones mate with them very often within a few minutes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00299744
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