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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    BioControl 32 (1987), S. 209-219 
    ISSN: 1573-8248
    Keywords: insecticide ; organophosphoré ; résistance ; sélection ; auxiliaire ; Phytoseiidae ; insecticide ; organophosphates ; resistance ; selection beneficial arthropods ; Phytoseiidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary The toxicity of methidathion was tested against seven strains ofPhytoseiulus persimilis obtained from laboratory cultures, commercially-produced stocks and from the field. The CL50 of the most resistant strain tested was 100 times higher than that of the most susceptible. All strains were subsequently selected using methidathion, until they were more or less equally resistant. The strains were then mixed and their overall progeny were again selected with methidathion and other pesticides before being used in integrated control programmes. Although the populations ofPhytoseiulus eventually released were still affected by methidathion, they were not eliminated by residues on the ground and were less susceptible to residues on leaves.
    Notes: Résumé La toxicité du méthidathion a été mesurée sur 7 souches dePhytoseiulus persimilis provenant de collections de laboratoire, d'unités de production ou du terrain. Les résultats obtenus se sont avérés être très variables: la CL50 de la souche la plus résistante est 100 fois plus élevée que celle de la souche la plus sensible. Chaque souche a ensuite été sélectionnée pour la résistance à cet insecticide; toutes les souches ont répondu à la sélection et ont atteint des niveaux de résistance similaires. Elles ont ensuite été mélangées, à nouveau sélectionnées pour la résistance au méthidathion et à d'autres insecticides et utilisées dans les programmes de lutte intégrée. La résistance a pu ainsi être légèrement augmentée et la souche obtenue, bien qu'encore affectée par le méthidathion sur le terrain, n'est plus complètement éliminée par les traitements et est moins sensible aux résidus présents sur les feuilles.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 22 (2000), S. 107-110 
    ISSN: 1279-8517
    Keywords: Anatomy ; Internet ; Computer networks ; Teaching
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In a preceding study, we had reviewed and evaluated the anatomy sites available on the Internet. The evolution of the available sites, the disappearance of certain sites and the appearance of new sites led us to update this list. In addition, the German-speaking sites were included in the study, which previously included only the Anglophone and French-speaking sites. Forty-eight sites were indexed and their addresses are available on the site of the Laboratory of Anatomy of the Faculty of Medicine Lyon-Nord (http://rockefeller.univ-lyon1.fr/Anatomie-Lyon-Nord). Compared to the scores allotted in 1998, we noted in 1999 a significant increase (p = 0.03) in the total score (12.13 ± 2.98 vs. 11,23 ± 2,28/20), which shows that the quality of the anatomic sites available on the Internet has improved.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Mineralogy and petrology 32 (1983), S. 171-185 
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Summary A possibility of studying the Raman effect of minerals “in situ” is now offered by the Raman microprobe which presents the two following characteristics: the ability to produce a point-size illurnination: the size of the laser beam impact may be as narrow as 1 μm2; a wide aperture optics permitting to catch the diffuse light. The spectra obtained from synthetic spinels belonging to the series Mg(Cr x Al2−x )O4 display noticeable shifts for some frequency bands and particularly a major shift of the high frequency band corresponding to the A1g mode. This displacement is included between 685 cm−1 for the Cr end-member and 770 cm−1 for the Al one. An identical phenomenon is shown by the spectra obtained from natural chromites of general formula (Mg,Fe2+)(Al, Cr, Fe3+)2O4. Thus one correlate the location of this high frequency band with the ratio Cr/Cr+Al of each member belonging to the synthetic spinels serie and each natural chromite sample. On the ground of the hypothesis that spinels belong to theFd3m spatial group, the group theory expects five Raman active vibrational modes: A1g +E g +3T2g . These expectations in agreement with the experimentation on the natural MgAl2O4 spinel, but the spectra of synthetic spinels as well as those of natural chromites, show a number of bands greater than five. Two hypothesis are given to explain the existence of some of those supplementary bands.
    Notes: Résumé La microsonde Raman-Laser permet d'étudier l'effet Raman des minéraux “in situ” et ce grâce à ses deux caractéristiques principales. la possibilité de produire un éclairement ponctuel, la surface d'impact du faisceau laser est de l'ordre du μm2; un objectif à grande ouverture numérique qui collecte la lumiêre diffusée. Les spectres obtenus à partir de spinelles de synthèse de la série Mg(Cr x Al2−x )O4 montrent un phénomène de variation de fréquence pour un certain nombre de bandes et plus particulièrement pour la bande de haute fréquence correspondant au mode A1g. En ce qui conceme cette dernière, la variation est comprise entre 685 cm−1 pour le terme purement chromifère et 770 cm−1 pour le terme purement alumineux. Un phénomène identique se produit dans les spectres obtenus à partir de chromites naturelles de formule générale (Mg, Fe2+) (Al, Cr, Fe3+)2O4. Ainsi la position de la bande de haute fréquence est corrélée avec le rapport Cr/Cr+Al de chaque terme appartenant soit à la série des spinelles de synthèse soit aux chromites naturelles. En partant de l'hypothèse que les spinelles appartiennent au groupe spatialFd3m, la théorie des groupes prévoit cinq modes actifs en Raman, à savoir: A1g +E g +3T2g . C'est ce que nous constatons pour le spinelle alumineux naturel MgAl2O4, mais les membres de la série Mg(Cr x Al2−x )O4 aussi bien d'ailleurs que les chromites naturelles présentent un nombre de bandes supérieur à cinq. Deux hypothèses sont formulées pour expliquer l'existence de certaines de ces bandes supplémentaires.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    GeoJournal 31 (1993), S. 279-287 
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Type of Medium: Electronic Resource
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  • 5
    facet.materialart.
    Unknown
    Munich: Center for Economic Studies and Ifo Institute (CESifo)
    Publication Date: 2019-01-22
    Description: This paper brings an important empirical contribution to the academic literature by examining whether gender differences in tax compliance are due to higher prosociality among women. We conducted a large cross-national tax compliance experiment carried out in Italy, U.K., U.S., Sweden, and Romania, and assessed tax compliance as reported income as a percentage of total earned income in the experiment. We uncover that women declare a significantly higher percentage of their income than men in all five countries. While some scholars have argued that differences in honesty between men and women is actually being mediated by the fact that women are more prosocial than men, we find that women are not more prosocial than men in all countries. Furthermore, though overall women tend to be more prosocial on average than men, SVO has no mediation effect between gender and tax compliance. We conclude then that although differences in prosociality between men and women seem to be context dependent, differences in tax compliance are indeed much more consistent.
    Keywords: A10 ; C90 ; C92 ; D64 ; H26 ; H30 ; H41 ; ddc:330 ; behavioral economics ; tax compliance ; gender
    Language: English
    Type: doc-type:workingPaper
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 8 (1994), S. 551-552 
    ISSN: 0268-2605
    Keywords: Arene chromium carbonyl complex ; trifluoromethyl compounds ; Diels-Alder cycloaddition ; diterpenes ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The tricarbonyl complex prepared from 1-trifluoromethyldihydronaphthalene and Cr(CO)3(NH3)3 undergoes Diels-Alder cycloaddition under high-pressure conditions (15 kbar) to give after decomplexation by natural light and deprotection, the tetrahydrophenanthrone product in 65% yield. This new methodology allows the activation of unreactive styrenes in Diels-Alder cycloaddition.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 4 (1990), S. 73-75 
    ISSN: 0268-2605
    Keywords: 2-Arylalkanoic acids ; analgesics ; antiinflammatories ; chromium carbonyl complex ; benzylic activation ; carbanion ; alkylation ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This communication presents a simple and efficient way to synthesize 2-arylalkanoic acids via chromium carbonyl complexation.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    ISSN: 1741-0444
    Keywords: Bone mineral content ; Dual-photon absorptiometry ; Fat mass ; Fat percentage ; Femoral neck ; Real-time recognition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract The authors have produced an original dual-photon absorptiometer, with specific algorithms, permitting real-time automatic bone recognition, to reduce examination time (to 5 min). It permits the simultaneous measurement of the mineral density of an area of bone (BMD), the fat percentage of the soft tissues (PFST) that surround it, and the variation in this percentage. It visually represents, on one and the same picture, freely defined in terms of dimension and definition, bone mineral distribution and fat mass distribution. The performances are analysed, using phantoms and taking ten control subjects, in the region of the femoral neck. The variations in PFST in the control subjects are compared with the measurements carried out in MRI in the same region. In all these control subjects, there is a regular decrease in PFST in this region along an upper external/lower internal axis. This decrease has been likened to a regression line, the slope of which, representing between −0·16 per cent of fat per cm and −1·7 per cent per cm, has a mean value of −0·81 per cent per cm. The BMD is thus reduced by 0–2·5 per cent, depending on the subjects.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    ISSN: 1434-1948
    Keywords: Radicals ; Carbenium ions ; Clusters ; Cobalt ; Molybdenum ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Complexed α-CF3 propargyl alcohols of the general formula [(M2L6){μ-η2,η2-RC≡CCH(CF3)(OH)}] were prepared with M2L6 = Co2(CO)6, R = CH3(CH2)4- (1), R = C6H5- (2); M2L6 = Co2(CO)5P(C6H5)3, R = CH3(CH2)4- (3a,b), R = C6H5- (4a,b); M2L6 = Co2(CO)4dppm, R = C6H5- (5); M2L6 = Co(CO)3MoCp(CO)2, R = CH3(CH2)4- (6a,b), R = C6H5- (7a,b). An X-ray molecular structure of the propargyl-alcohol complex [{Co2(CO)4dppm}{μ-η2,η2-C6H5C≡CCH(CF3)(OH)}] (5) was also determined. The related carbenium ions [(M2L6){μ-η2,η3-RC≡CCH(CF3)}][BF4] (8-12) were obtained from the parent propargyl alcohol complexes by direct protonation with HBF4· Et2O in diethyl ether. These carbenium ions were reduced further by Zn in CH2Cl2 to give the alkyne adducts [(M2L6){μ-η2,η2-RC≡CCH2(CF3)}] (13-17), as confirmed by the X-ray molecular structure of [(Co2(CO)4dppm){μ-η2,η2-C6H5C≡CCH2(CF3)}] (17). Treatment of the carbenium ion complex [{Co(CO)3MoCp(CO)2}{μ-η2,η3-CH3(CH2)4C≡CCH(CF3)}][BF4] (8) with NaSMe unexpectedly afforded the reduced alkyne adduct [{Co(CO)3MoCp(CO)2}{μ-η2,η2-CH3(CH2)4C≡CCH2(CF3)}] (13), along with the alkyne-thioether diastereomers {Co(CO)3MoCp(CO)2}{μ-η2,η2-CH3(CH2)4C≡CCH(CF3)[(SMe)}] (18a,b). Presumably, all the reduction reactions proceed primarily by the formation of the transient radical species, which are subsequently transformed into the reduced alkyne complexes by hydrogen abstraction from the solvent medium. Interestingly, in the case of the complexed alcohols [{Co2(CO)5P(C6H5)3}{μ-η2,η2-RC≡CCH(CF3)(OH)}] (3a,b) and (4a,b), the reduction process occurs in acidic medium in THF/CH2Cl2. An extensive study of the electronic and steric factors that influence the stability and reactivity of the carbenium ions were performed, which allowed us to explain the behavior of the related radical species in solution during the reduction process.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Tetrahedron: Asymmetry 3 (1992), S. 375-376 
    ISSN: 0957-4166
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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