ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Publication Date: 2013-12-10
    Electronic ISSN: 1753-318X
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A preconcentration method of 13 rare earth elements (REES) was studied for neutron activation ananlysis (NAA). Hydrated magnesium oxide was used as the preconcentration agent to absorb the REES ions from aqueous solution onto the solid magnesium oxide, which was separated and analyzed. It was observed that the Langmuir equation for isothermal adsorption was well obeyed by the REES under the condition studied. The efficiency of the preconcentration process using hydrated magnesium oxide was critically examined for each of REE and for mixture of REES by preparing a known volume of solution containing known amount of trace REES. NAA was used to analyze REES recovered by the preconcentration process. It was found that the REES recoveries were satisfactory and the preconcentration process is reliable. There are several resort resort areas in Taiwan where local people are enjoying its hot spring water. It is generally believed that the hot spring water spa would bring about some sorts of therapeutic functions. The preconcentration method developed above, was applied to analyze the trace amounts of REES in hot spring wate in Taiwan.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 39 (1999), S. 284-286 
    ISSN: 1741-2765
    Keywords: Fiber ; shear ; characterization ; composite ; torsion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A technique was developed for determining the longitudinal shear modulus of uniform diameter single fibers. A length of single fiber suspended from one end and with a weight attached at the other end was used as a torsional pendulum. Its longitudinal shear modulus can be experessed as a function of the frequency of oscillation of the torsional pendulum. Tests were conducted on five different types of fibers: carbon, Kevlar 49, silicon carbide, K-glass fibers and G-glass fibers.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Fillet-welded T-joints with crack-like discontinuities are analyzed using the photoelasticity method. Stress-intensity factors of opening modes are determined for undercut, overlap and center-line crack of fillet joints with respect to the various loading conditions and the weld dimensions. The photoelastic analysis uses a 20-point overdeterministic approach. The accuracy of fringe measurement is obtained by iteration of the measured results on a pattern-recognition software.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract An attempt was made to establish a reliable method using chemical neutron activation analysis for surveillance of pollutants in waste waters released by plants manufacturing various kinds of products. Since preconcentration process played important role in the entire course of the analysis work, special precaution was taken to re-confirm that the recovery efficiencies for pollutant ions were satisfactory during the preconcentration. It was also re-examined that the Langmuir's adsorption isotherm pattern well obeyed by all ions under investigation. In recent years, significant amounts of rare earth compounds and other raw materials containing representative elements have been imported and consumed to meet the demand due to the rapid progress in new manufacturing technology. Samples were collected from ten various production lines in plants and potential pollutants were determined using the Tsing Hua Open-pool Reactor. It would be noteworthy that the specimens obtained by this preconcentration process also would be usable for Induced Coupled Plasma-Mass Spectrometry analysis for supplementary and/or comparison purposes.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Taiwan monazite is a unique mineral obtained from the heavy sand found in the river floor of Tzuo-suei river and En-suei river. Both rivers are flowing parallel with separated narrow area into the sea at southwestern coast of Taiwan. The characteristic of monazite is that it contains considerable rare earth elements (REEs). REEs are considered very useful elements in the local industries and scientific researches such as ceramic, semiconductors, and glass optics. In this study, chemical neutron activation analysis (CNAA) was used to determine the contents of REEs in Taiwan monazite. A few milligram of monazite was digested in the microwave oven for 25 minutes with mixed acid (conc. HNO3 and HClO4). REEs were preconcentrated by hydrated magnesium oxide and CNAA was performed.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    ISSN: 0029-5981
    Keywords: base isolation ; earthquake ; friction pendulum system ; passive control ; seismic analysis ; non linear analysis ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: In this paper, an advanced analytical model and finite element formulations including local bending moment effects for the Friction Pendulum System (FPS) are presented. Some important findings in these investigations reveal that local bending moments which result from the movements of the isolator, should be accounted for in the engineering design. The results presented in this paper show that if the effects of local bending moments are excluded from design considerations, it may endanger structures during earthquakes. The new formulations considering local effects provide an effective tool to simulate the behaviour of FPS-isolated structures subjected to earthquake loadings. The proposed formulations can be applied directly for both two- and three-dimensional analyses without any further assumption. It is easy to implement the proposed techniques in existing finite element programs. The results obtained from the numerical analyses suggest that the local bending moment effects are of significant importance, and should be taken into account to assure the safety of isolated structures during earthquakes. © 1997 by John Wiley & Sons, Ltd.
    Additional Material: 20 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Biochemical genetics 17 (1979), S. 1109-1119 
    ISSN: 1573-4927
    Keywords: Zea mays L. ; corn ; embryo ; endosperm ; zein ; genetic regulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Zein may account for as much as 10% of the total protein in the mature embryo of maize inbred W64A. This protein exhibited an electrophoretic pattern on SDS gels similar to that of the endosperm. Like the endosperm system, the synthesis of zein components in the embryo was controlled by the opaque-2 and floury-2 mutations. However, unlike zein synthesis in the endosperm, zein synthesis in the embryo could not be increased by nitrogen fertilizer. Variations in amino acid composition were observed between the zein components of the embryo and those of the endosperm.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Water, air & soil pollution 99 (1997), S. 55-62 
    ISSN: 1573-2932
    Keywords: Flocs ; median size ; fine-sediments ; pH ; shear ; size spreading ; probability of cohesion ; electrophoretic mobility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Flocculation experiments were carried out by using a Collette type of viscometer for applying uniform fluid shears to freshwater suspensions of estuarine fine-grained particles. The suspensions were buffered by a malcic acid/ammonium hydroxide system. The objectives of the study are to investigate the relationship between the steady-state sires of flocculated particles and applied shear at various pH values. The results showed that thle rate of particle flocculation increased with tile addition of the buffer. With a particle concentration of 100 mg/l and pH of 6.0, tile floc size decreased with the increasing shear. While with a pH of 7.5, the floc size increased with the shear until it reached a maximum value at the shear of 400 s−1 and then the size decreased as the shear increased further to 500 s−1. The maximum size slicar was found at 200 s−1 for pH 7.9. By increasing tile pH value to 9.0, there was no particle growth with any applied shear. The electroplioretic mobility of the particles was measured. It was found that for any constant shear the floc size is inversely proportional to the absolute value of the mobility. That is, the more repulsive the force between particles, the smaller the floc size. The effect of pH on floc size was not uniform within the pH range tested. The results demonstrated that the higher the shear the more significant the changes of floc size due to the pH effect.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Water, air & soil pollution 99 (1997), S. 55-62 
    ISSN: 1573-2932
    Keywords: Flocs ; median size ; fine-sediments ; pH ; shear ; size spreading ; probability of cohesion ; electrophoretic mobility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Flocculation experiments were carried out by using a Couette type of viscometer for applying uniform fluid shears to freshwater suspensions of estuarine fine-grained particles. The suspensions were buffered by a maleic acid/ammonium hydroxide system. The objectives of the study are to investigate the relationship between the steady-state sizes of flocculated particles and applied shear at various pH values. The results showed that the rate of particle flocculation increased with the addition of the buffer. With a particle concentration of 100 mg/l and pH of 6.0, the floc size decreased with the increasing shear. While with a pH of 7.5, the floc size increased with the shear until it reached a maximum value at the shear of 400 s-1, and then the size decreased as the shear increased further to 500 s-1. The maximum size shear was found at 200 s-1 for pH 7.9. By increasing the pH value to 9.0, there was no particle growth with any applied shear. The electrophoretic mobility of the particles was measured. It was found that for any constant shear the floc size is inversely proportional to the absolute value of the mobility. That is, the more repulsive the force between particles, the smaller the floc size. The effect of pH on floc size was not uniform within the pH range tested. The results demonstrated that the higher the shear the more significant the changes of floc size due to the pH effect.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...