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  • 1990-1994  (21)
  • 1985-1989  (18)
  • 1970-1974  (10)
  • 1915-1919  (1)
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  • 11
    Electronic Resource
    Electronic Resource
    Demonstration of Strain-hardening of Steel (1915)
    [s.l.] : Nature Publishing Group
    Nature 94 (1915), S. 589-589 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE accompanying photograph (Fig. 1) represents the side of a steel bar. The bar was first marked by a punch in the way shown, and the punch marks were afterwards completely filed out. The side was then polished and the bar pulled in a testing machine beyond the elastic limit of the material. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/094589c0
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    Paper (German National Licenses)
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  • 12
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    Unknown
    A possible basis for individual differences in magnitude-estimation behaviour (1974)
    London, etc. : Periodicals Archive Online (PAO)
    British journal of psychology. 65 (1974) 85 
    Details
    ISSN: 0007-1269
    Topics: Psychology
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:0047-1974-065-00-000010
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  • 13
    Electronic Resource
    Electronic Resource
    Carcinoma of the gallbladder in ulcerative colitis and primary sclerosing cholangitis (1991)
    Springer
    Diseases of the colon & rectum 34 (1991), S. 827-828 
    Details
    ISSN: 1530-0358
    Keywords: Gallbladder ; Carcinoma ; Ulcerative colitis ; Primary sclerosing cholangitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The authors present the cases of two patients with carcinoma of the gallbladder complicating chronic ulcerative colitis. Both patients had concomitant primary sclerosing cholangitis. Twelve such cases of gallbladder carcinoma have been reported in the literature. The presence of primary sclerosing cholangitis in patients with ulcerative colitis is associated with malignancy of the extrahepatic biliary tree. It is suggested that, if colectomy is necessary, the liver should be biopsied and a cholecystectomy performed if the gallbladder is deemed abnormal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02051079
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    Paper (German National Licenses)
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  • 14
    Electronic Resource
    Electronic Resource
    Monophagy in a polyphagous grasshopper,Schistocerca shoshone (1994)
    Springer
    Entomologia experimentalis et applicata 73 (1994), S. 255-264 
    Details
    ISSN: 1570-7458
    Keywords: grasshopper ; monophagy ; polyphagy ; Simmondsia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The feeding behavior of different populations of the grasshopper,Schistocerca shoshone, was investigated in the southwestern United States. Insects from three riparian populations, with a broad spectrum of plants available to them, tended to eat plants roughly in relation to their availability except that broad-leaved herbaceous plants were avoided. Insects from a desert population in a plantation ofSimmondsia fed exclusively on that plant, as did those from another population in the Tucson mountains, despite the availability of a range of other plants. Insects from a third desert population, near Portal, fed mainly onProsopis, the dominant woody plant. In detailed behavioral experiments in the laboratory, insects from Tucson mountains readily acceptedSimmondsia, and less readily acceptedProsopis. Three other common woody plants from the habitat were generally rejected without feeding. Insects from Portal acceptedProsopis andSimmondsia with approximately equal readiness. Breeding experiments suggested that the differences between the plantation insects and those from Portal was genetic and not induced by experience. The insects from both populations were potentially polyphagous and ate a wide range of plants in the laboratory if given no alternative.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02382477
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  • 15
    Electronic Resource
    Electronic Resource
    Effects of fluvalinate on two-spotted spider mite dispersal, fecundity and feeding (1994)
    Springer
    Entomologia experimentalis et applicata 71 (1994), S. 145-153 
    Details
    ISSN: 1570-7458
    Keywords: fluvalinate ; pyrethroids ; spider mites ; Tetranychus urticae ; behaviour ; sub-lethal effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Residual deposits of fluvalinate caused two-spotted spider mite,Tetranychus urticae Koch, dispersal by running off (run-off) and spinning down (spin-down) from treated leaves. Run-off occured at concentrations from 0.0005 g a.i. 1−1 and reached a peak at 0.01 g a.i. 1−1. Spin-down was more predominant at concentrations above 0.01 g a.i. 1−1. Spin-down and run-off proportions varied with fluvalinate formulation. Oviposition was temporarily suppressed on fluvalinate-treated leaves, presumably because of an irritant effect which reduced feeding. An emulsifiable concentrate formulation caused the largest reductions in oviposition. Oviposition returned to the level exhibited by untreated mites two days after removal from treated surfaces. Oviposition and feeding were positively correlated and both declined reciprocally with increasing fluvalinate concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02382382
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  • 16
    Electronic Resource
    Electronic Resource
    Meal size in nymphs of Locusta migratoria (1972)
    Springer
    Entomologia experimentalis et applicata 15 (1972), S. 399-410 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Die Nahrungsmenge, die von einer Larve der Wanderheuschrecke, Locusta migratoria L., im fünften Entwicklungsstadium bei einer einzigen Mahlzeit verzehrt wird, wurde ermittelt, indem ihr Darm und Darminhalt sofort nach dem Fressen gewogen wurden. In der Mitte des Entwicklungsstadiums wurden größere Mengen verzehrt, Weibchen fraßen mehr als Männchen, jedoch sind die weiblichen Larven ja auch größer. Die Menge der aufgenommenen Nahrung vergrößerte sich mit der Dauer künstlichen Futterentzuges. Sie erreichte ihren Höhepunkt nach sechs Stunden, nach welcher Zeit der Vorderdarm absolut leer war. Die verzehrten Mengen waren je nach der Art der Nahrung unterschiedlich. Auch stellten die Insekten sich so ein, daß sie von einer bestimmten Nahrung mehr zu sich nahmen, wenn sie daran aufgezogen worden waren. Nach längeren Zeitspannen der Isolierung hatten sie die Tendenz, weniger zu fressen. Temperatur und Feuchtigkeit hatten keinen Einfluß auf die Mengen, die verzehrt wurden, außer bei 40°, bei welcher Temperatur sich das gesamte Verhalten zum Fressen ändert.
    Notes: Abstract Meal size in fifth-instar nymphs of Locusta migratoria L. has been investigated by weighing the gut and its contents immediately after feeding. Larger meals are taken in mid-instar, while females eat more in one meal than males under the same conditions. Bigger meals are also eaten after longer periods of food deprivation, but after deprivation for two hours or less, corresponding with the normal interfeed length, meals are smaller than would be expected from the potential maximum foregut volume. The maximum volume attained varies with the type of food available to the insects and is influenced by previous conditioning. Temperature and humidity do not affect meal size except at 40°, at which temperature the usual pattern of feeding is completely altered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00293604
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  • 17
    Electronic Resource
    Electronic Resource
    The importance of palpation in food selection by a polyphagous grasshopper (Orthoptera: Acrididae) (1993)
    Springer
    Journal of insect behavior 6 (1993), S. 79-91 
    Details
    ISSN: 1572-8889
    Keywords: associative learning ; grasshopper ; palpation ; plant surface
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The behavioral responses of final-instar nymphs of Schistocerca americanato a variety of acceptable and unacceptable plants were recorded. Palpation occurred on all plants and the palps are involved in both acceptance and rejection. On most unacceptable plants, rejection was at first dependent on biting the leaf, but subsequently on Lantana, Machaeranthera, Moms,and Physalis,rejection often occurred after palpation of the surface alone. This is consistent with the suggestion that associative learning occurs. This response did not wane even when the insects had been without food for over 2 h. There was also some evidence of an innate response to the surface characteristics of Physalis.The features of the surfaces that produced these responses were not determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01049149
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  • 18
    Electronic Resource
    Electronic Resource
    The relationship between plant acceptability and suitability for survival and development of the polyphagous grasshopper,Schistocerca americana (Orthoptera: Acrididae) (1994)
    Springer
    Journal of insect behavior 7 (1994), S. 411-431 
    Details
    ISSN: 1572-8889
    Keywords: development ; food aversion learning ; grasshopper ; habituation ; plant acceptability ; polyphagy ; survival
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The feeding behavior of final-instar nymphs ofSchistocerca americana was observed when they first encountered plants that ranged in acceptability from being eaten in large amounts to not being eaten at all. Growth and survival on the same plants through the last stadium were also studied and the results combined as a suitability index to facilitate comparison with the behavior. Although the plants that were eaten most gave the highest suitability index and those that were not eaten permitted no survival, there was no simple relationship between the amounts eaten and the suitability for growth and survival. The possibility that the insects might become habituated to plants that were initially unacceptable was investigated, but no habituation was found over a 3-day period. It is suggested that food intake is largely determined by the presence of deterrent compounds in the less acceptable foods and that nutritional differences between the plants are likely to have been of minor importance. The behavior on some foods suggests that food aversion learning may be involved. It is concluded that the variability of the insects' behavior makes it impossible to predict the suitability of a plant from their immediate behavioral responses. In the field, insects may sometimes reject foods that would be suitable for survival and development, and feed on plants that are nutritionally deficient or even toxic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02025441
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  • 19
    Electronic Resource
    Electronic Resource
    Use of the64Ni(36S,34Si)66Zn reaction to measure the mass of34Si (1985)
    Springer
    The European physical journal 321 (1985), S. 119-123 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The reaction64Ni(36S,34Si)66Zn atE=198 MeV has been used to measure the mass excess of34Si; a value of −19.971 −0.044 +0.037 MeV was obtained. This result which is in agreement with the previous value (−19.85±0.30 MeV) is in excellent agreement with recent shell-model mass predictions. The result is discussed within the context of the proposed region of deformation aroundZ=11,N=20.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411955
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  • 20
    Electronic Resource
    Electronic Resource
    Insect behavior at the leaf surface and learning as aspects of host plant selection (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 215-222 
    Details
    ISSN: 1420-9071
    Keywords: Behavior ; learning ; leaf surface ; wax ; insects ; food selection ; secondary compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Direct observations on the feeding behavior of insect herbivores are uncommon, but important. The important aspects of host-plant selection by phytophagous insects that have been revealed by such observations are the role of chemicals in the leaf surface, and learning. There are few detailed reports of behavior at the leaf surface, but these indicate that many, if not all, insects exhibit behavior pattenrs that can be interpreted as an examination of the quality of the surface and acceptance or rejection may follow without further testing. A number of experiments show that chemicals from the leaf surface commonly contribute to the acceptability or otherwise of a plant and in most cases so far the active chemicals are of widespread occurrence, not having a specific association with the host plant. Some experiments show that the association between surface chemicals and plant palatability is learned, but in other cases there is evidence of an innate response. Habituation to deterrent chemicals has been demonstrated in the laboratory, but not in the field. Food aversion learning also occurs and may be important in dietary switching by polyphagous insects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01951806
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