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  • 1
    Monograph available for loan
    Monograph available for loan
    Petrogenesis of late cenozoic volcanic rocks from the Raton-Clayton volcanic field, northeastern New Mexico and southwestern Colorado : Ph. D Thesis (1996)
    Ann Arbor, Mich. : UMI
    Details Availability
    Call number: M 01.0008
    Type of Medium: Monograph available for loan
    Pages: XII, 229 S.
    Series Statement: UMI microform 9610730
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Microstructure, Mechanical Property and Antibacterial Characteristics of Ferritic Stainless Steel (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 510-511 (Mar. 2006), p. 970-973 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Based on the mechanism of high antibacterial performance of copper, an antibacterialstainless steel bearing1.5wt% copper was fabricated. Processing of vacuum arc melting, hot rolling, and a series of heat treatments were applied to prepare the specimens. The relationships among the microstructure, mechanical properties, and the regime of treatment were investigated. Furthermore, the antibacterial properties of the specimens were assessed. The results showed that fine anduniformed dispersion Cu-rich phase precipitated and accumulated along the grain boundaries of the matrix during the processing of aging, and a marked variation in tensile strength and yield strength was evaluated. In addition, antibacterial result showed that the as-received material has the ability to kill Staphylococcus and coliform bacteria in the excess of 99.99%, respectively
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/12/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.510-511.970.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Study on the Contamination of Fracture-Karst Water in Boshan District, China (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 35 (1997), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Boshan is an industrial city in the center of Shandong Province where ground water is the only source for the urban water supply. The major water resource is fracture-karst water in the middle Ordovician carbonate rocks. Based on the hydrogeological investigation and mapping in this area we studied the geologic and hydrogeologic settings, the major pollution sources and the pathways of contamination, the principal contaminants, and their spatial distribution in ground water. The ground-water quality has also been estimated by the fuzzy mathematic method. The geostatistical method, such as the kriging method, was taken to simulate spatial distribution of the contaminants. The grey system method was adopted to forecast future contamination. An attempt at the remediation of Cr6+ contamination in fracture-karst water was also discussed. Finally, some proposals for the protection of the ground-water environment in Boshan District are offered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1997.tb00114.x
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  • 4
    Electronic Resource
    Electronic Resource
    DESIGN OF A DIVERSION SYSTEM TO MANAGE THE FIRST FLUSH (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 25 (1989), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : To manage the first flush of storm runoff in urbanized areas, a diversion box and detention basin system has been proposed for a new storm sewer system or for retrofitting an existing system. A software package for a personal computer has been developed to facilitate the analysis and design of the system. Hydrographs and pollutographs are generated at the inlet and outlet of the diversion box and the detention basin. The peak outflow and peak pollutant concentrations are compared with the allowable outflow and pollutant concentration for urban stormwater quantity and quality management. The model is developed for both analysis and design purposes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1989.tb03087.x
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  • 5
    Electronic Resource
    Electronic Resource
    The phenolic vir gene inducer ferulic acid is O-demethylated by the VirH2 protein of an Agrobacterium tumefaciens Ti plasmid (1999)
    Oxford BSL : Blackwell Science Ltd
    Molecular microbiology 34 (1999), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Some or possibly all Ti plasmids of Agrobacterium tumefaciens encode a bicistronic operon designated virH, which encodes two proteins, VirH1 and VirH2, that resemble a family of cytochrome P450-type monooxygenases. Expression of this operon is induced by a family of phenolic compounds that induce all other operons within the vir regulon. We hypothesized that either or both of these proteins might metabolize some or all of these phenolic compounds. We therefore tested induction of a vir promoter by a variety of phenolic compounds in isogenic strains that express or lack virH1 and virH2. Although some compounds were equally effective inducers regardless of the virH status, other compounds induced vir expression far more effectively in the virH mutant than in the virH-proficient host. For all tested compounds, VirH2 appeared to be solely responsible for this effect. One such compound, ferulic acid, was chosen for biochemical analysis. Ferulic acid was degraded by a VirH-proficient host but not by a VirH mutant. The wild-type strain released large amounts of a more hydrophilic compound into the cell supernatant. This compound was tested by mass spectroscopy, nuclear magnetic resonance and UV spectroscopy and found to consist of caffeic acid. This indicates that wild-type strains convert virtually all added ferulic acid to caffeic acid, and that VirH2 is essential for this O-demethylation reaction. Ferulic acid was far more toxic than caffeic acid to the wild-type strain, although the wild-type strain was more resistant to ferulic acid than was the virH mutant. Caffeic acid was slowly removed from the broth, suggesting further metabolic reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2958.1999.01617.x
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  • 6
    Electronic Resource
    Electronic Resource
    Diastereoselective Propargylation of .alpha.-Alkoxy Aldehydes with Propargyl Bromide and Zinc. A Versatile and Efficient Method for the Synthesis of Chiral Oxygenated Acyclic Natural Products (1995)
    s.l. : American Chemical Society
    The @journal of organic chemistry 60 (1995), S. 3257-3259 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00115a049
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  • 7
    Electronic Resource
    Electronic Resource
    Synthetic Studies toward Mono-THF Annonaceous Acetogenins: A Diastereoselective and Convergent Approach to Corossolone and (10RS)-Corossoline (1995)
    s.l. : American Chemical Society
    The @journal of organic chemistry 60 (1995), S. 1170-1176 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00110a019
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  • 8
    Electronic Resource
    Electronic Resource
    A Case-Addition Policy for Case-Base Maintenance (2001)
    Oxford, UK and Boston, USA : Blackwell Publishers Ltd
    Computational intelligence 17 (2001), S. 0 
    Details
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: A major problem in many practical applications of case-based reasoning (CBR) and knowledge reuse is how to keep the case bases concise and complete. To solve this problem requires repeated maintenance operations to be applied to case bases. Different maintenance policies may result in case bases with very different quality. In this article, we present a case-addition maintenance policy that is guaranteed to return a concise case base with good coverage quality. We demonstrate that the coverage of the case base computed by the case-addition algorithm is no worse than the optimal case-base coverage by a fixed lower bound. We also show that the algorithm implementing the case-addition policy is efficient. Our result also highlights benefit reduction as a key factor in influencing the convergence of case-base coverage when cases are added to a case base. Through our theoretical analysis, we analytically derive the well known coverage convergence curves commonly displayed in CBR experiments and show that benefit reduction can be used as a predictor for convergence speed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/0824-7935.00143
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  • 9
    Electronic Resource
    Electronic Resource
    CsrA and three redundant small RNAs regulate quorum sensing in Vibrio cholerae (2005)
    Oxford, UK : Blackwell Science Ltd
    Molecular microbiology 58 (2005), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Bacteria communicate using a process called quorum sensing which involves production, secretion and detection of signalling molecules called autoinducers. Quorum sensing allows populations of bacteria to simultaneously regulate gene expression in response to changes in cell density. The human pathogen, Vibrio cholerae, uses a quorum-sensing circuit composed of parallel systems that transduce information through four redundant regulatory small RNAs (sRNAs) called quorum regulatory RNAs (Qrr) to control the expression of numerous genes, most notably those required for virulence. We show that the VarS/VarA two-component sensory system comprises an additional regulatory input controlling quorum-sensing-dependent gene expression in V. cholerae. VarS/VarA controls transcription of three previously unidentified small regulatory RNAs (sRNAs) that are similar to the sRNAs CsrB and CsrC of Escherichia coli. The three V. cholerae sRNAs, which we name CsrB, CsrC and CsrD, act redundantly to control the activity of the global regulatory protein, CsrA. The VarS/VarA-CsrA/BCD system converges with the V. cholerae quorum-sensing systems to regulate the expression of the Qrr sRNAs, and thus, the entire quorum-sensing regulon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.2005.04902.x
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  • 10
    Electronic Resource
    Electronic Resource
    TrlR, a defective TraR-like protein of Agrobacterium tumefaciens, blocks TraR function in vitro by forming inactive TrlR:TraR dimers (2001)
    Oxford, UK : Blackwell Science, Ltd
    Molecular microbiology 40 (2001), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Octopine-type Ti plasmids of Agrobacterium tumefaciens require the quorum-sensing proteins TraR and TraI and the diffusible pheromone 3-oxooctanoyl homoserine lactone (AAI) to regulate genes required for conjugal transfer. TraR activity is inhibited by a protein called TrlR, which closely resembles amino acids 1–181 of TraR but is truncated as a result of a shift in the reading frame at codon 182. This frameshift does not affect synthesis of the amino-terminal domain, which is thought to bind autoinducer and mediate protein dimerization, but abolishes translation of the carboxyl-terminal, DNA-binding domain. In this study, we show that TrlR, like TraR, requires AAI for solubility when overexpressed in Escherichia coli. TrlR bound one molecule of AAI per protein monomer, supporting the prediction that the amino-terminal domain of TraR contains the AAI binding site. Purified TrlR blocked TraR for both specific DNA binding and transcription of a tra promoter, supporting previous studies performed with whole cells. When TrlR and a TraR fusion protein were co-expressed in E. coli, these proteins readily formed heterodimeric complexes that were inactive in DNA-binding activity. These data support the hypotheses that (i) the amino-terminal half of TraR binds AAI and mediates protein dimerization; (ii) both DNA-binding domains in a TraR dimer are required for stable DNA binding; and (iii) TrlR blocks TraR by direct protein–protein interactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2958.2001.02385.x
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