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  • 1
    Electronic Resource
    Electronic Resource
    The elasto-visco-plastic analysis for rock displacement of the foundation pit of a water power plant (1982)
    Springer
    Rock mechanics and rock engineering 15 (1982), S. 145-161 
    Details
    ISSN: 1434-453X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Notes: Summary The Elasto-Visco-Plastic Analysis for Rock Displacement of the Foundation Pit of a Water Power Plant In this paper a method used in the elasto-visco-plastic analysis is proposed. It has been employed for deformation analysis of the foundation pit of a large water power plant in China. The back analysis of this rock engineering problem shows that the relief of the rock initial stresses due to excavation and the rheological properties of the weak intercalations and the rock masses as well are the main factors which caused the large deformation of the foundation pit. The results from the calculations are coincided fairly well with the data measured and observed in situ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01238261
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  • 2
    Electronic Resource
    Electronic Resource
    The Synthesis and Phase Behavior of a Novel Discoticnematic Triphenylene Mesogen and its Application to an Optically Anisotropic Film (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 678-681 
    Details
    ISSN: 1013-9826
    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: A novel discotic triphenylene derivative bearing one triphenylene discogen as core andthree cyano-biphenyl moieties was synthesized and its thermal behavior was studied using polarizingoptical microscope, differential scanning calorimeter and X-ray diffraction. It was found that thismolecule containing [decylene?] spacers showed nematic phase. After being mixed with methylmethacrylate (MMA), the discogen showed nematic phase at the mesophase temperature range(64~85 ºC) and oriented spontaneously in the mixture after annealing for 2 hours in the mixture. Theorientation can be stabilized by the polymerization of MMA. The orientation can be fixed by thepolymerization of MMA. It was treated directly on glass substrate, which surface did not treat bypolyimide film and confirmed the orientation was proved by X-ray diffraction. This offers If thealignment of the discotic molecules can be freely controlled and fixed, a useful mean to produce newarea of optically anisotropic film will be produced with this material
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.678.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    A Photometric Method for Measuring Photoacid Generator Efficiencies Using Rhodamine B as Acid Sensor in Thin Polymer Films (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 686-689 
    Details
    ISSN: 1013-9826
    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: This paper reported a novel method to measure photoinduced acid generation in polymerfilms, which were widely used in microlithography. The method employed Rhodamine B (RB) asacid sensor due to its changes in color and uv-vis absorbency in acidic condition. The property ofRhodamine B was examined in hydrochloric and trifluoromethyl sulfonic acids, and the standardworking curves in thin polymer film were set up, which indicated the relationship of acidconcentration and Rhodamine B’s relative peak absorption ("ABS). In this case, the difference inabsorbency could reflect the different amounts of acid generated. According to these standardworking curves, we can calculate the efficiency of photoacid generator (PAG).This method has advantage over existing method in measuring the efficiency of photoacid generatorin solution, because it eliminated the influence of solvents
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.686.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    A FEM Study on Thermal Stress in Laminated Composite (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 786-789 
    Details
    ISSN: 1013-9826
    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: The 3-D elasto-plastic finite element method (FEM) was used to analyze the thermal stressin the laminated composite (SiC/6061Al) under the condition of a temperature cycling of 200 0C-300C- 200 0C-30 0C. The results from the FEM analysis showed that the hysteretic peak value of the vonMises equivalent stress in the substrate 6061Al was increased significantly as the temperature loadingcycles processed on but it was nearly the same after the first cycle in the interface layer SiC of thelaminated composite. The elastic strain in the substrate 6061Al varied within the range of -0.15% to0.15% and the maximum plastic deformation was equal to about 0.26 %. The results also showed thatthe maximum normal stress Sx was increased from 32.8 MPa to 87.9 MPa after ten cycles and thework-hardening of the substrate 6061Al occurred during the stress and strain hysteresis loop
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.786.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    A Novel Thermo-Sensitive Polymer Film and its Imaging Properties (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 658-661 
    Details
    ISSN: 1013-9826
    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: Three copolymers containing isobutyl p-styrenesulfonate (IBSS) and carboxyl units, i.e.methyl methacrylate (MMA) and methacrylic acid (MAA), were synthesized and their chemicalstructures and thermal behaviors were investigated by using TGA, DSC, FTIR and other methods.Films were prepared by using the synthesized copolymers in combination with a bisvinyl ethercompound, i.e. 2,2-bis(4-(2-(vinyloxy)ethoxy)phenyl)propane (BVPP), to applied onto an aluminumplate. Crosslinking and de-crosslinking reactions would readily take place when the polymer filmswere baking treated at 100 oC and 200 oC for a short period of time, respectively. Along with thechemical structural changes during thermal treatments, an affinity change was achieved from beinginsoluble to completely soluble in neutral water. A positive-working and neutral water-developableimaging material was proposed and preliminary studies on the imaging properties were conducted
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.658.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    DNA lysis is involved in the simplified fluorescence plus Giemsa method for differential staining of sister chromatids (1984)
    Springer
    Chromosoma 89 (1984), S. 76-78 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The DNA labelling of the bifilarly 5-bromodeoxyuridine- to-substituted chromatid decreased relative to that of the unifilarly substituted chromatid with increasing duration of HB pretreatment (Hoechst 33258 plus black light at 55° C). Sister chromatid differential staining was detected by Giemsa as well as a DNA-specific dye, ethidium bromide, after 4 s of HB pretreatment. The contrast of sister chromatid differential staining was improved with increased duration of HB pretreatment or by incubation with exonucleases. Hydrogen donors such as cysteamine, cysteine, and L-ascorbic acid inhibited the HB pretreatment, but this inhibition could be overcome by increasing the duration of HB pretreatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00302354
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  • 7
    Electronic Resource
    Electronic Resource
    Cytokinin enhancement of the light induction of nitrate reductase transcript levels in etiolated barley leaves (1990)
    Springer
    Plant molecular biology 14 (1990), S. 585-594 
    Details
    ISSN: 1573-5028
    Keywords: cytokinin ; gene expression ; mRNA ; nitrate reductase ; transcriptional regulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract To investigate the molecular mechanism of cytokinin regulation of nitrate reductase (NR) activity, the influence of benzyladenine (BA) on the level of NR transcript was studied in etiolated barley leaves using a barley NR cDNA as a probe. Northern blot analyses of the levels of NR poly (A)+ RNA indicate that the amount present is proportional to the concentration of BA (2×10-8 to 2×10-4 M) applied to the leaves. Enhancement of NR mRNA by 2×10-5 M BA was clearly detected after 15 minutes of exposure of the leaves to light. The enhancement is cytokinin-specific and adenine is ineffective. Brief treatment with the protein synthesis inhibitor, cycloheximide, inhibited BA-enhanced NR activity but did not inhibit BA-enhanced NR transcript level, thus the enhancement was independent of concurrent protein synthesis. Nuclear runoff transcription studies showed that the enhancement of NR mRNA was at least partially due to increased transcription rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027504
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  • 8
    Electronic Resource
    Electronic Resource
    Identifying object isomerism in multidatabase systems (1996)
    Springer
    Distributed and parallel databases 4 (1996), S. 143-168 
    Details
    ISSN: 1573-7578
    Keywords: multidatabase systems ; object schema integration ; object isomerism ; data/schema integration conflicts ; probabilistic partial values
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract In a multidatabase system that consists of object databases, the same real-world entity can be stored as objects in different databases with incompatible object identifiers. How to identify and integrate these objects representing the same entities such that (a) object duplication in the query result can be avoided, (b) information for the entity can be gathered, and (c) the specialization of multiple classes can be built is an important issue to provide a well structured global object schema and a more informative query result. In this paper, we extend our results on probabilistic query processing and joining relations on incompatible keys to solve the problem. Various data and schema conflicts such as missing data, inconsistent data and domain mismatch which may exist in classes from different databases are considered in the process of identification.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00204905
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  • 9
    Electronic Resource
    Electronic Resource
    Metabolic engineering and control analysis for production of aromatics: Role of transaldolase (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 53 (1997), S. 132-138 
    Details
    ISSN: 0006-3592
    Keywords: metabolic engineering ; metabolic control analysis ; transaldolase ; aromatics ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Aromatic metabolites in Escherichia coli and other microorganisms are derived from two common precursors: phosphoenolpyruvate (PEP) and erythrose 4-phosphate (E4P). During growth on glucose, the levels of both E4P and PEP are insufficient for high throughput of aromatics because of the low carbon flux through the pentose pathway and the use of PEP in the phosphotransferase system. It has been shown that transketolase and PEP synthase are effective in relieving this limitation and promoting high throughput of aromatics. To determine whether transaldolase, another E4P-producing enzyme, is also a limiting factor in directing carbon flux to the aromatic pathway, E. coli transaldolase gene (tal) was cloned and overexpressed in an aroB strain which excretes 3-deoxy-D-arabinoheptulosonate-7-phosphate (DAHP), the first intermediate in the aromatic pathway. We found that overexpression of transaldolase did significantly increase the production of DAHP from glucose. This result further supports the contention that the supply of E4P is limiting when glucose is the carbon source. However, overexpression of transaldolase in strains which already overexpress transketolase did not show a further increase in production of aromatics. This result was attributed to the saturation of E4P supply when TktA was overexpressed. The flux control of DAHP production was discussed on the basis of Metabolic Control Analysis. © 1997 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Long-term exposure to chromium(VI) oxide leads to defects in sulfate transport system in chinese hamster ovary cells (1995)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 57 (1995), S. 655-665 
    Details
    ISSN: 0730-2312
    Keywords: sulfate uptake ; chromium(VI) uptake ; GSH ; GST ; catalase ; cytotoxicity ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Chromium(VI) resistant Chinese hamster ovary (CHO) cell lines were established in this study by exposing parental CHO-K1 cells to sequential increases in CrO3 concentration. The final concentration of CrO3 used for selection was 7 μM for Cr7 and 16 μM for Cr16 cells. Cr16-1 was a subclone derived from Cr16 cells. Next, these resistant cells were cultured in media without CrO3 for more than 6 months. The resistance of these cells to CrO3 was determined by colony-forming ability following a 24-h treatment. The LD50 of CrO3 for chromium(VI) resistant cells was at least 25-fold higher than that of the parental cells. The cellular growth rate, chromosome number, and the hprt mutation frequency of these chromium(VI) resistant cells were quite similar to their parental cells. The glutathione level, glutathione S-transferase, catalase activity, and metallothionine mRNA level in Cr7 and Cr16-1 cells were not significantly different from their parental cells. Furthermore, Cr16-1 cells were as sensitive as CHO-K1 cells to free-radical generating agents, including hydrogen peroxide, nickel chloride, and methanesulfonate methyl ester, and emetine, i.e., a protein synthesis inhibitor. The uptake of chromium(VI) and the remaining amount of this metal in these resistant and the parental cell lines were assayed by atomic absorption spectrophotometry. Experimental results indicated that a vastly smaller amount of CrO3 entered the resistant cell lines than their parental cells did. A comparison was made of the sulfate uptake abilities of CHO-K1 and chromium(VI) resistant cell lines. These results revealed that the uptake of sulfate anion was substantially reduced in Cr7 and Cr16-1 cells. Extracellular chloride reduced sulfate uptake in CHO-K1 but not in Cr16-1 cells. Therefore, the major causative for chromium(VI) resistance in these resistant cells could possibly be due to the defects in SO42-/C1- transport system for uptake chromium(VI).
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240570410
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