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  • 1
    Electronic Resource
    Electronic Resource
    Detection of antitumor and antimicrobial activities in marine organism associated actinomycetes isolated from the Taiwan Strait, China (2000)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 188 (2000), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The purpose of this work was to screen the actinomycetes having antitumor or antimicrobial activity, which were isolated from the surface, epidermis and intestines of sea plants and animals collected from the Taiwan Strait, China. Antitumor activity was studied by the MTT assay and DNA target activity was studied by the biochemical induction assay while antimicrobial activity was determined by observing bacterial and fungal growth inhibition. 20.6% of marine actinomycete cultures displayed cytotoxic activity on P388 cells at dilutions at and below 1:320 and 18.6% on KB cells. 2.96% of marine actinomycete cultures displayed inducing activity. Among all marine actinomycetes isolated, the genus Micromonospora has the highest positive rate of inducing activity. However, most antimicrobial activity was found in the genus Streptomyces. These results indicate that marine organism associated actinomycetes could be a promising source for antitumor and antimicrobial bioactive agents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2000.tb09173.x
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  • 2
    Electronic Resource
    Electronic Resource
    Embedding Locally Compact Semigroups into Groups (1998)
    Springer
    Semigroup forum 57 (1998), S. 151-156 
    Details
    ISSN: 1432-2137
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00005971
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  • 3
    Electronic Resource
    Electronic Resource
    Thermal Study of Rock Grinding, Part 2: Temperature Analysis (2003)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 250 (Sept. 2003), p. 155-162 
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.250.155.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Experimental Investigation of Intermittent Rotary Ultrasonic Machining (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 425-430 
    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: Rotary ultrasonic machining (RUM) is considered as an effective machining method,which has been utilized to machine hard and brittle materials such as advanced ceramics. In order toimprove the hole wall surface quality during RUM, it is important to wash away swarf in the gapbetween the tool and the workpiece as fast as possible. In this paper, a new machine process –intermittent rotary ultrasonic machining (IRUM) – is introduced for the first time. The cutting force,surface roughness and coolant flow rate in conventional rotary ultrasonic machining (CRUM)process and IRUM process are compared. It is found that compared with CRUM, the output coolantflow rate could be increased significantly by using the IRUM method. It is also found that thesurface roughness of workpiece can be improved significantly in IRUM
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.425.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Study on the Influence Factors of Electrochemical Micromachining (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 364-366 (Dec. 2007), p. 903-908 
    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: There are many influence factors of electrochemical micromachining (EMM)development. So the characteristics of EMM technology were analyzed firstly. It was an effectivemethod that the nanosecond pulses voltage was used in EMM, and the nanosecond pulses voltagewas prepared to solve the problems of machining area, using small gap, and machining micro 3Dstructure. Its minimum pulse duration is 5ns, and its voltage, current, and duty ratio can be changedfreely. Moreover, many experiments of EMM were carried into execution. After the phenomenonand results of the experiments were analyzed, the reformative project of experiment was putforward. The feasibility of the project and technique route was testified correctly by the nanosecondpulses voltage on the multifunction machine tool which was manufactured independently. Afterstudying on the influences of EMM technology, the experiences of EMM process will be enrichedand make EMM have a further development
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.364-366.903.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Experimental Study of Microelectrode Array and Micro-Hole Array Fabricated by Ultrasonic Enhanced Micro-EDM (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 364-366 (Dec. 2007), p. 482-487 
    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: Micro electrical discharge machining (EDM), enhanced with ultrasonic vibration, isexplored and assessed as a method for developing microelectrode array, for microelectrode arrayfabricated by LIGA has shortcomings such as complex technology and high price. Based on themechanism of micro-EDM, micro-hole array discharges to fabricate microelectrode array by reversecopying. In the process of reverse copying, the thicker rod electrode can not rotate, resulting inelectric arc and short-circuit occurring easily, so it is necessary to add ultrasonic vibration on theplane plate electrode, in order to exclude debris as soon as possible and stabilize machining process.In the process of machining, four parameters, such as working voltage, working capacity, ultrasonicamplitude and holes spacing, are important to machining efficiency, each parameter has four typicalvalues. In order to reduce experiment times, a scheme of orthogonal experiment was designed withdifferent parameters combination. With result of experiments, the ratio of mean square deviation toerror mean square deviation of each parameter was calculated and significance of each parameterwas obtained, and the best parameters combination was asserted through theoretical calculation.Also, experimental study of using microelectrode array to machine micro-hole array by Micro-EDM was made and influence curve of each parameter was drawn. Finally, 5×5 arrays ofmicroelectrode were obtained, the diameter of single electrode is less than about 30.m and heightto-width aspect ratios is more than 8, moreover, these microelectrode arrays have good coaxialityand surface quality
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.364-366.482.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Study on Technology of Block Electro-Discharge Grinding with Lower Working Voltage for Fabricating Micro Electrode (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 375-376 (Mar. 2008), p. 303-307 
    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: Micro electrical discharge machining (EDM) with block electro discharge grinding(BEDG), is explored and assessed as a method for developing micro electrode, for wire electrodischarge grinding (WEDG) has shortcoming of low working efficiency, especially in the case ofmicro machining. For fabricating micro electrode by BEDG, mechanics of initial clamping errorsare analyzed, the technology of electrode movement is proposed to compensate the clamping errorsand control the finish size of micro electrodes. On the basis of a great deal of experiments, the effectof working voltage on machining efficiency has been found out and been analyzed theoretically,threshold value of working voltage is determined to be about 30V.As shown by result with thetechnology, at a high machining speed, the minimum diameter of micro electrodes reaches 3*m, itsslenderness ratio is more than 5
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.303.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Analytical Study of Temperatures in Sawing with Segmented Blades (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 259-260 (Mar. 2004), p. 490-495 
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.259-260.490.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Thermodynamic Analysis of Friction Pairs inside a High Temperature Flow Rate Control Valve for Scramjet Engines (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 575-578 (Apr. 2008), p. 1240-1245 
    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: A spool type high temperature control valve is developed to control the flow rate of hightemperature fuel supply for scramjet engines in this paper. The clearance between the friction pairs ofthe spool and sleeve is crucial for the proper performance of the valve working at the temperature ashigh as 700 K. The high temperature environment may cause problems to the valve, for instance thethermal deformation of the valve materials, the failure of the friction pairs inside the valve and eventhe damage of the operating proportional electromagnet. Therefore the thermodynamic analyses ofthe valve are carried out using 2D finite element analysis method. The heat transfer and fluid dynamicmodels, as well as the boundary conditions are introduced. The heat flux through the fluid/solidinterface is calculated to connect the heat transfer models inside the solid domain and the fluiddomain. By solving both the heat transfer and turbulent flow models in the solid and fluid domains,the flow field distribution inside the flow channel and the thermal field distribution inside all the partsof the valve are shown. Suggestions on the design of the valve are given according to thethermodynamic analysis results
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.1240.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    The Application of Fiber Optic Sensor to the Study of Engineering Structure (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 1351-1354 
    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 fiber optic sensor measuring system based on the Mech-Zehnder interferometry isdeveloped in the paper. The system can be used for the strain and vibration measurement ofengineering structure, and has the advantages: convenient adjusting, stable performance and strongability of anti-interference, etc. Therefore the fiber optic sensor has been widely used in theengineering field.First the system is introduced into measuring the frequency and amplitude of the vibrationsubjected to force of the FRP-concrete beam. The fiber optic sensor measuring system and theelectronic measuring system are synchronous used for the measurement. The analysis results offiber optic sensor measurement approximate to the results of electronic strain gauge. Then thesystem is introduced into experimental stress analysis on the gas pipe, good results is obtained too.The paper provides new technical equipment for the experimental testing of various engineeringstructure using fiber optic sensor, also establishes the technical foundation of the research of smartstructure
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.1351.pdf
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