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  • 1
    Electronic Resource
    Electronic Resource
    Results of the sixth joint pesticide testing programme of the IOBC/WPRS-working group «pesticides and beneficial organisms» (1994)
    Springer
    BioControl 39 (1994), S. 107-119 
    Details
    ISSN: 1573-8248
    Keywords: pesticides ; side effects ; beneficial arthropods ; natural enemies ; parasitoids ; predators ; entomopathogenic fungi ; IOBC ; International Organization for Biological Control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Les effets secondaires de 5 insecticides, 8 fongicides et 6 herbicides sur 24 espèces auxiliaires ont été étudiés par les membres du Groupe de travail «Pesticides et Organismes utiles» de l'OILB, Organisation Internationale de Lutte biologique Section Régionale Ouest Paléarctique (SROP). Les tests ont été effectués par 24 participants appartenant à 11 pays, et selon des directives internationalement approuvées. L'insecticide buprofézine (Applaud), les fongicides triforine (Saprol), promycidone (Sumisclex), anilazine (Dyrène), triademinol (Bayfidan), hexaconazole (Anvil), tridémorphe (Calixin) et les berbicides tralkoxydime (Grasp), bentazone (Basagran) se sont révélés sans danger pour presque tous les auxiliaires. Le diflubenzuron (Dimilin) avait un effet néfaste sur les araignées et les larves d'insectes prédateurs. Les 10 préparations restantes étaient plus toxiques et doivent donc faire l'objet d'autres essais sur les organismes utilisés.
    Notes: Abstract The side effects of 5 insecticides, 8 fungicides and 6 herbicides on 24 species of beneficial organisms were tested by members of the Working Group «Pesticides and Beneficial Organisms» of the International Organization for Biological Control (IOBC), West Palaearctic Regional Section (WPRS). The tests were conducted by 24 members in 11 countries according to internationally approved guidelines. The insecticide buprofezin (Applaud), the fungicides triforine (Saprol), procymidone (Sumisclex), anilazine (Dyrene), triadimenol (Bayfidan), hexaconazole (Anvil), tridemorph (Calixin) and the herbicides tralkoxydim (Grasp), bentazone (Basagran) were harmless to nearly all the beneficial organisms. Diflubenzuron (Dimilin) affected spiders and the larvae of predatory insects. The remaining 10 preparations were more toxic and should therefore be further tested in semi-field and field experiment on relevant organisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02373500
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  • 2
    Electronic Resource
    Electronic Resource
    Chlorate electrosynthesis current efficiency equations based on dimensionless groups (1992)
    Springer
    Journal of applied electrochemistry 22 (1992), S. 1185-1191 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Various mathematical models for the electrosynthesis of chlorate are analysed taking into account that the current efficiency is mainly affected by the distribution of the two competing reactions forming chlorate, i.e. the anodic oxidation and the autoxidation of hypochlorite. It is shown that the current efficiency is determined by four dimensionless groups one of which is commonly negligible. Results are compared with a known current efficiency equation. Two new current efficiency equations, representing the limiting operating conditions of chlorate systems, are proposed for industrial application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01297422
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  • 3
    Electronic Resource
    Electronic Resource
    Interfacial supersaturation at gas evolving electrodes (1993)
    Springer
    Journal of applied electrochemistry 23 (1993), S. 1323-1325 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00234819
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Bildung von Difluorhalogenmethylarsanen durch Reaktion von Difluorcarben mit Arsenhalogeniden (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 588 (1990), S. 26-32 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Formation of Difluorohalomethyl Arsanes by Interacting Difluorocarbene with Arsenic HalidesBis(trifluoromethyl)cadmium stabilized by acetonitrile, Cd(CF3)2 · 2 CH3CN, is used as source for the in situ formation of difluorocarbene. Difluorocarbene reacts with arsenic halides, AsX3 (X = Cl, Br, I) to form the corresponding difluorohalomethylarsanes, As(CF2X)nX3-n. The extent of insertion increases in the series AsCl3 〈 AsBr3 〈 Asl3. The cadmium complex behaves towards AsF3 as trifluoromethylating agent.
    Notes: Für die in situ Erzeugung von Difluorcarben wird mit Acetonitril stabilisiertes Bis(trifluormethyl)cadmium, Cd(CF3)2 · 2 CH3CN, verwendet. Dieses reagiert mit Arsenhalogeniden, AsX3 (X = Cl, Br, I) unter Bildung entsprechender Difluorhalogenmethylarsane, As(CF2X)nX3-n. Das Ausmaß der Insertion nimmt in der Reihe AsCl3 〈 AsBr3 〈 AsI3 zu. Gegenüber AsF3 verhält sich der Cadmiumkomplex als Trifluormethylierungsagens.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905880104
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  • 5
    Electronic Resource
    Electronic Resource
    Untersuchungen zur SiF4-Sorption an Kieselglaspulvern (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 589 (1990), S. 235-239 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Absorption of SiF4 at Silica PowdersThe absorption of SiF4 at silica powder was investigated in dependence on temperature and pressure. It starts at about 800 K. In the range of 800 K up to 1160 K the amount of SiF4 absorbed within 24 hours increases with temperature, and at a constant temperature (880 K) with the filling pressure of SiF4 (2 kPa-30 kPa). Desorption of SiF4 was proved experimentally at temperature above 1273 K. It is connected with crystallization of silica into β-cristobalite.
    Notes: Es wurde die Druck- und Temperaturabhängigkeit der Sorption von SiF4 an Kieselglaspulvern untersucht. Die Sorption setzt bei etwa 800 K ein. Von 800 K bis 1160 K nimmt der in 24 Stunden absorbierte SiF4-Anteil mit der Temperatur zu. Bei konstanter Temperatur (880 K) wächst die absorbierte Menge mit dem Ausgangsdruck (2 kPa - 30 kPa). Die Desorption ist bei Temperaturen ≥ 1273 K experimentell nachweisbar und mit der Kristallisation des Kieselglaspulvers zu β-Cristobalit verbunden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905890126
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  • 6
    Electronic Resource
    Electronic Resource
    Zur Reaktion von Trifluorhalomethanen mit Phosphanen (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1099-1102 
    Details
    ISSN: 0044-2313
    Keywords: Trifluorohalomethanes ; Trifluoromethylphosphonium Halides ; Trifluoromethylphosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reaction of Trifluorohalomethanes with PhosphanesThe reactions of trifluorohalomethanes CF3X (X = Cl, Br, I) with Ph3P, Bu3P, (Me2N)3P, and (Et2N)3P were investigated. CClF3 does not react. In the reactions of CBrF3 and CF3I with Bu3P in acetonitrile trifluorophosphonium salts, [Bu3PCF3]X (X = Br, I), are formed, whereas gaseous CF3I and Bu3P yield Bu2PCF3. Depending on the reaction conditions the aminophosphanes form either [(R2N)3PX]X (R = Me, Et; X = Br, I) and CF3H or [(R2N)3PCF3]X.
    Notes: Es wird über die Reaktionen der Trifluorhalomethane CF3X (X = Cl, Br, I) mit Ph3P, Bu3P, (Me2N)3P und (Et2N)3P berichtet. CClF3 verhält sich inert. CBrF3 und CF3I bilden in Acetonitril mit Bu3P Trifluormethylphosphoniumsalze, [Bu3PCF3]X (X = Br, I), während sich gasförmiges CF3I mit Bu3P zu Bu2PCF3 umsetzt. Die Aminophosphane reagieren in Abhängigkeit von den Reaktionsbedingungen zu [(R2N)3PX]X (R = Me, Et; X = Br, I) und CF3H bzw. [(R2N)3PCF3]X.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200625
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Reaktion von Halomethylphosphoniumhalogeniden, [R3PCYnX3-n]X, mit Phosphanen, R′3P (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1103-1109 
    Details
    ISSN: 0044-2313
    Keywords: Halomethylphosphonium Halides ; Bisphosphonium Salts ; Phosphoranylphosphonium Salts ; Transalkylation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reaction of Halomethylphosphonium Halides, [R3PCYnX3-n]X, with Phosphanes, R′3PThe results of the reaction of 19 different halomethylphosphonium halides, [R3PCYnX3-n]X (R = Ph, n-Bu, Me2N, Et2N; Y = H, F; X = Cl, Br, I; n = 0-2), with Ph3P, n-Bu3P, and (R2N)3P are presented. As reaction products bisphosphonium salts, [R3P—CYnX2-n—PR′3]X2, and phosphoranylphosphonium salts, [R3P=CY—PR′3]X, or reduced (halo)methyl-phosphonium salts, [R3PCHYnX2-n]X, are obtained. [Ph3PCBrF2]Br and [Bu3PCBrF2]Br react with R′3P by trans-alkylation forming [R′3PCBrF2]Br. The factors influencing the course of the reaction are discussed.
    Notes: Es wird über die Reaktion von 19 verschiedenen Halomethylphosphoniumsalzen, [R3PCYnX3-n]X (R = Ph, n-Bu, Me2N, Et2N; Y = H, F; X = Cl, Br, I; n = 0-2), mit Ph3P, n-Bu3P und (R2N)3P berichtet. Als Reaktionsprodukte werden Bisphosphoniumsalze, [R3P—CYnX2-n—PR′3]X2, und Phosphoranylphosphoniumsalze, [R3P=CY—PR′3]X, oder reduzierte (Halo)methylphosphoniumsalze, [R3PCHYnX2-n]X, erhalten. [Ph3PCBrF2]Br und [Bu3PCBrF2]Br reagieren mit R′3P unter Umalkylierung zu [R′3PCBrF2]Br. Die den Reaktionsverlauf beeinflussenden Faktoren werden diskutiert.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200626
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  • 8
    Electronic Resource
    Electronic Resource
    Shell model description of hyper-Raman scattering from alkali metal halides (1990)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 21 (1990), S. 813-818 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Hyper-Raman scattering by the zone-centre optical phonons of alkali metal halides is described in terms of an anharmonic shell model. In order to reproduce the measured relative values of the hyper-Raman tensor elements, three types of fourth-order coupling parameters, representing intra-ionic, inter-ionic and Coulomb anharmonicities have to be taken into account. Deducing the non-linear force constants of the short-range inter-ionic interactions from a Born-Mayer potential and supplementing them by exact expressions of their Coulomb Counterparts, it is possible to determine all parameters contributing to hyper-Raman scattering. The model also predicts the third-harmonic generation coefficients in satisfactory agreement with experimental data.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250211209
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  • 9
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    Determination of the degree of dissociation of an atomic hydrogen target by a recoil-ion time-of-flight method (1990)
    Elsevier
    Details
    Publication Date: 1990-02-01
    Print ISSN: 0168-9002
    Electronic ISSN: 1872-9576
    Topics: Physics
    Published by Elsevier
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  • 10
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    Performance on test beam of the L3 double-sided silicon microstrip detector (1994)
    Elsevier
    Details
    Publication Date: 1994-09-01
    Print ISSN: 0168-9002
    Electronic ISSN: 1872-9576
    Topics: Physics
    Published by Elsevier
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