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  • 1
    Electronic Resource
    Electronic Resource
    Integrated approach to surfactant environmental safety assessment: fast atom bombardment mass spectrometry and liquid scintillation counting to determine the mechanism and kinetics of surfactant biodegradation (1992)
    s.l. : American Chemical Society
    Analytical chemistry 64 (1992), S. 2951-2957 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00047a013
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  • 2
    Electronic Resource
    Electronic Resource
    On the formation of boron-nitrogen clusters in a laser-induced plasma
    Amsterdam : Elsevier
    International Journal of Mass Spectrometry and Ion Processes 85 (1988), S. 327-338 
    Details
    ISSN: 0168-1176
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-1176(88)80046-6
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  • 3
    Electronic Resource
    Electronic Resource
    Hydrolytic enzyme activity in landfilled refuse (1993)
    Springer
    Applied microbiology and biotechnology 38 (1993), S. 828-832 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Extracellular hydrolytic enzyme activity was assayed in 28 refuse samples excavated from 14 bore holes in Fresh Kills Landfill, Staten Island, N. Y. Esterases, proteases and amylases were present in all of the samples. Enzyme screening assays utilizing the API-ZYM test system showed the incidence of enzymes in the order: specific phosphatases 〉 esterases 〉 glycosyl hydrolases. Measurement of cellulase by the cellulose-azure test detected activity in two out of 28 samples. Analysis for cellulase activity using the cellulose-azure test on refuse samples from landfills in Naples, Florida, and Tucson, Arizona, also showed a limited distribution of cellulases. Mineralization of [14C]cellulose, an independent measure of cellulase activity, ranged from 〈 5 to 23% in a 4-week incubation, which supports a highly variable cellulolytic activity in landfilled refuse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00167153
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  • 4
    Electronic Resource
    Electronic Resource
    Darstellung von C6H5M(CO)5 (M = Mn, Re) und ortho-metallierten Ketonen mit einem Mangan- bzw. Rhenium-Ringglied (1980)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 471 (1980), S. 175-186 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation of C6H5M(CO5 (M = Mn, Re) and Ortho-Metallated Ketones with a Manganese or Rhenium Ring MemberC6H5Mn(CO)5 and C6H5Re(CO)5 were obtained by a new preparation method by a photochemical reaction between M2(CO)10 (M = Mn, Re) and (C6H5)2Hg. The reaction of C6H5Mn(CO)5 with (CH3)2Hg at different reaction conditions yielded the o-metallated benzophenone or the acetophenone; such known o-metallated derivates were prepared as yet by a reaction between the ketones and CH3Mn(CO)5. The ortho-metallated ketones and or were reaction products between Mn2(CO)10 and R2Hg (R=C6H5 or p-(CH3)2NC6H4). On the contrary Re2(CO)10 and (C6H5)2Hg were capable to form the analogous ortho-metallated benzophenone derivatives only by an addition of benzophenone. A substitution reaction of a CO ligand by P(C6H5)3, a fission of the five-membered heterocyclic ring and a phenylation was carried out for some of such o-metallated ketones. The products were characterized by infrared spectroscopic measurements.
    Notes: C6H5Mn(CO)5 und C6H5Re(CO)5 wurden nach einem neuen Darstellungsverfahren durch eine photochemische Umsetzung zwischen M2(CO)10 und (C6H5)2Hg erhalten. Die Reaktion von C6H5Mn(CO)5 mit (CH3)2Hg ergab bei verschiedenen Reaktionsbedingungen das o-metallierte Benzophenon oder das Acetophenon; solche bekannten o-metallierten Derivate wurden bisher durch eine Umsetzung zwischen den jeweiligen Ketonen und CH3Mn(CO)5 hergestellt. Die o-metallierten Ketone und oder sind Reaktionsprodukte zwischen Mn2(CO)10 und R2Hg (R=C6H5) oder o-(CH3)2NC6H4). Demgegenüber reagierte Re2(CO)10 und (C6H5)2Hg nur bei einem Zusatz von Benzophenon zu den analogen ortho-metallierten Benzophenon-Derivaten. Eine CO-Ligandensubstitutionsreaktion gegen P(C6H5)3, eine Spaltung des heterozyklischen Fünfrings und eine Phenylierung wurden für einige solcher o-metallierter Ketone durchgeführt. Die Produkte wurden durch infrarotspektroskopische Messungen charakterisiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19804710120
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  • 5
    Electronic Resource
    Electronic Resource
    Gallium-, Indium-Mangan- und Thallium-Rhenium-Carbonylverbindungen (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 485 (1982), S. 234-240 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Gallium-, Indium-Manganese-, and Thallium-Rhenium Carbonyl CompoundsCompounds of type Na{Cl4-nM[Mn(CO)5]n} (M = Ga, In; n = 1, 2, 3) were prepared by reaction of the Lewis acids MCl3 and NaMn(CO)5. Instead of the sodium salts were obtained the compounds (C3H7CO2)2InMn(CO)4L (Indium atom with the coordination number 5) from Indium(III) butyrate with two carboxylate groups bonded as chelate ligands and NaMn(CO)4L [L = CO, P(C6H5)3] in the molar ratio 1:1. By reacting TlCl with NaRe(CO)5 i.r. spectroscopic measurements of the solution pointed out the intermediate product TlRe(CO)5, which was unstable against a disproportionation reaction into Tl and Tl[Re(CO)5]3. The last named compound delivered as a thermal decomposition product Re2(CO)8[μ-TlRe(CO)5]2. I.r. bands of the new compounds were assigned.
    Notes: Verbindungen des Typs Na{Cl4-nM[Mn(CO)5]n} (M = Ga, In; n = 1, 2, 3) wurden durch Umsetzungen der Lewissäuren MCl3 mit NaMn(CO)5 hergestellt. An Stelle der Natriumsalze entstanden die beiden Produkte (C3H7CO2)2InMn(CO)4L (Indiumatom mit Koordinationszahl 5) bei Umsetzungen zwischen Indium(III)-butyrat mit zwei chelatartig gebundenen Carboxylatgruppen und NaMn(CO)4L [L = CO, P(C6H5)3] im Molverhältnis 1:1. Bei der Reaktion von TlCl mit NaRe(CO)5 zeigten infrarotspektroskopische Lösungsuntersuchungen das Zwischenprodukt TlRe(CO)5, welches instabil gegenüber einer Disproportionierungsreaktion in Thalliummetall und Tl[Re(CO)5]3 war. Die letztgenannte Verbindung lieferte als ein thermisches Zersetzungsprodukt Re2(CO)8[μ-TlRe(CO)5]2. Es wurden den neuen Verbindungen IR-Banden zugeordnet.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824850123
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  • 6
    Electronic Resource
    Electronic Resource
    Synthese und Eigenschaften der heteronuklearen Metallatomcluster Re4(CO)12[μ3-GaRe(CO)5]4 und Re2(CO)3[μ-GaRe(CO)5]2 (1985)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 521 (1985), S. 15-22 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Properties of Heteronuclear Metal Atom Clusters Re4(CO)12[μ3-GaRe(CO)5]4 and Re2(CO)8[μ-GaRe(CO)5]2The title compounds were prepared by the reaction of gallium halides and dirhenium decacarbonyl. Crystals of the four-membered cluster Re2(CO)8[μ-GaRe(CO)5]2 gave at 3000C with aggregation of four Re atoms to an inner Re4 tetrahedron the product Re4(CO)12(CO)[μ3-GaRe(CO)5]4and with Ga2I3 shown by mass spectroscopic measurements the molecule ion Re4(CO)16+. In tetra-hydrofuran solution the cluster Re4(CO)12[μ3-GaRe(CO)5]4 and the hydride Li[C2H5)3BH] have formed the formyl complex Li4{Re4(CO)12[μ3 -GaRe(CO)4(CHO)] 4}, which was estimated by 1H n. m. r. and i. r. spectroscopic data.Both synthesized gallium rhenium carbonyl clusters were characterized by i.r. spectroscopic measurements. The comparison of these results with those of the structurally known indium rhenium carbonyl clusters led to proposals of the molecule structure of the analogous gallium rhenium compounds.
    Notes: Die Titelverbindungen wurden durch Umsetzungen zwischen Galliumhalogeniden und Dirheniumdekacarbonyl dargestellt. Kristalle des Vierringclusters Re2(CO)8[μ-GaRe(CO)5]2 ergaben ei 300°C under Aggregation von vier Re-Atomen zu einem inneren Re4-Tetraeder das Produkt Re4(CO)12[μ3-GaRe(CO)5]4 sowie mit Ga2I3 das massenspektroskopisch nachgewiesene Molekülion Re4(CO)16+, Die Reaktion zwischen dem Cluster Re4(CO)12[μ3-GaRe(CO)5]4 under Li[(C2H5)3BH] in Tetrahydrofuran führte aufgrund von 1H-NMR- sowie IR-spektroskopischen Meßergebnissen zum Formylkomplex ((Li)4{Re4(CO)12[μ3-GaRe(CO)4(CHO)]4}.Die dargestellten Heterometallatomcluster wurden durch infrarotspektroskopische Messungen charakterisiert. Der Vergleich dieser Meßergebnisse mt denjenigen der strukturmäßig bekannten Indium-Rheniumcarbonylcluster ermöglichte die Aufstellung von Struktruvorschlägen für die analogen Gallium-Rheniumcarbonylcluster.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19855210203
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  • 7
    Electronic Resource
    Electronic Resource
    Heteronukleare Metallatomcluster der Typen X4-n[SnM(CO)4P(C6H5)3]n und M2(CO)8 [μ-Sn(X)M (CO)4P(C6H5)3]2 aus Umsetzungen von SnX2 mit M2(CO)8[P(C6H5)3]2 (X = Halogen; M = Mn, Re; n = 2, 3) (1984)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 513 (1984), S. 22-34 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Heteronuclear Metal Atom Clusters of the Types X4-n[SnM(CO)4P(C6H5)3]n and M2(CO)8[μ-Sn(X)M(CO)4P(C6H5)3]2 by Reaction of SnX2 with M2(CO)8[P(C6H5)3]2 (X = Halogene; M = Mn, Re; n = 2, 3)The compounds of the both types X4-n[SnM(CO)4P(C6H5)3]n (n = 3; M = Mn; X = F, Cl, Br, I. n = 2: M = Mn, Re; X = Cl, Br, I) and M2(CO)8[μ-Sn(X)M(CO)4P(C6H5)3]2 (M = Mn; X = Cl, I. M = Re; X = Cl, Br, I) are prepared by reaction of SnX2 with M2(CO)8[P(C6H5)3]2 (M = Mn, Re). Their IR frequencies are assigned.In Re2(CO)8[μ-Sn(Cl)Re(CO)4P(C6H5)3]2 the central molecule fragment contains a planar Re2Sn2 rhombus with a transannular Re—Re bond of 316.0(2) pm. Each of the SnIV atoms is connected with the terminal ligands Cl and Re(CO)4P(C6H5)3. These ligands are in transposition with respect to the Re2Sn2 ring. The mean values for the remaining bond distances (pm) are: Sn—Re = 274.0(3); Sn—Cl = 243(1), Re—C = 176(5), Re—P = 242.4(9), C—O = 123(5).The factors with an influence on the geometrical shape of such M2Sn2 rings (M = transition metal) are discussed.
    Notes: Die Verbindungen der beiden Typen X4-n[SnM(CO)4P(C6H5)3]n (n = 3; M = Mn; X = F, Cl, Br, I. n = 2; M = Mn, Re; X = Cl, Br, I) sowie M2(CO)8[μ-Sn(X)M(CO)4P(C6H5)3]2 (M = Mn; X = Cl, I. M = Re; X = Cl, Br, I) werden durch die Umsetzung von SnX2 mit M2(CO)8[P(C6H5)3]2 (M = Mn, Re) dargestellt. Ihre IR-Bandenlagen werden zugeordnet.Das zentrale Molekülfragment von Re2(CO)8[μ-Sn(Cl)Re(CO)4P(C6H5)3]2 besteht aus einem planaren Re2Sn2-Rhombus mit einer transannularen Re—Re-Bindung von 316,0(2) pm. Neben den beiden Rhenium-Ringatomen ist jedes Zinn (IV)-Atom mit einem Cl- und Re(CO)4P(C6H5)3-Liganden verknüpft; das Koordinationspolyeder am SnIV ist verzerrt tetraedrisch. Die beiden letztgenannten Liganden befinden sich in trans-Stellung zum Re2Sn2-Rhombus. Weitere Bindungsabstände (pm) betragen: Sn—Re = 274,0(3); Sn—Cl = 243(1); Re—P = 242,4(9); Re—C = 176(5) sowie C—O = 123(5). Faktoren mit Einfluß auf die Geometrie solcher M2Sn2-Rhomben (M = Übergangsmetall) werden diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19845130604
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  • 8
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    Evidence for type II cells as cells of origin of K-Ras-induced distal lung adenocarcinoma (2012)
    National Academy of Sciences
    Details
    Publication Date: 2012-03-12
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 9
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    Actin polymerization induces a shape change in actin-containing vesicles. (1989)
    National Academy of Sciences
    Details
    Publication Date: 1989-08-01
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 10
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    Supporting Evidence for a 9.6 {+/-} 1 ka Rock Fall Originating from Glacier Point in Yosemite Valley, California (2013)
    Association of Engineering Geologists (AEG)
    Details
    Publication Date: 2013-10-16
    Description: Large boulders exceeding 10 m 3 in exposed volume are widely scattered throughout Upper Pines Campground in eastern Yosemite Valley, Yosemite National Park, California. These enigmatic boulders rest up to 330 m from the base of adjacent talus slopes but lack geomorphic expressions typical of other large rock fall, debris flow, or glacial deposits in Yosemite. We evaluated four hypotheses for boulder deposition: (1) glacial deposition during ice retreat 15–17 ka, (2) fluvial deposition during a high-discharge flood event, (3) debris flow deposition, and (4) rock fall deposition. We utilized field mapping, spatial analysis, cosmogenic 10 Be exposure dating, and X-ray fluorescence analysis to investigate possible modes of deposition. A mean boulder exposure age of 9.6 ± 1 ka considerably post-dates glacial retreat from Yosemite Valley, effectively ruling out glacial deposition. Discharge and bed stress calculations indicate that although flooding could have been capable of entraining boulders at confined upstream locations, it is unlikely to have transported boulders as far as the Upper Pines area. Slope comparisons and evaluation of surface morphology of debris flow fans in Yosemite Valley suggest that the boulders did not result from debris flows. Geochemical results identify a majority of boulders in Upper Pines as granodiorite of Glacier Point, corresponding to bedrock samples located at the summit of Glacier Point. We interpret boulders in Upper Pines Campground to result from a single large rock fall event originating from the east face of Glacier Point circa 9.6 ± 1 ka; they were subsequently partially buried by alluvial fan aggradation, modifying the original geomorphic expression.
    Print ISSN: 1078-7275
    Topics: Geosciences
    Published by Association of Engineering Geologists (AEG)
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