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  • 1
    Electronic Resource
    Electronic Resource
    Nanocrystals Synthesis by Microreactors (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advances in science and technology Vol. 45 (Oct. 2006), p. 652-659 
    Details
    ISSN: 1662-0356
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Natural Sciences in General , Technology
    Notes: A microreactor is a continuous flow reactor, which can control reaction conditionsprecisely. We applied the microreactors to CdSe based nanocrystals synthesis and tuning particlesize, optical properties. Furthermore, homogeneous coating of ZnS and its coating amount tuningwas possible for optical properties improvement
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.652.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Selenoxide elimination for the synthesis of unsaturated-sugar uracil nucleosides (1991)
    s.l. : American Chemical Society
    The @journal of organic chemistry 56 (1991), S. 5401-5408 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00018a038
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of Polyelectrolyte Dispersants on the Preparation of Silica-Coated Zinc Oxide Particles in Aqueous Media (2002)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 85 (2002), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Sodium silicate was utilized to obtain a SiO2 coating on ZnO particles to prevent a photocatalytic reaction between ZnO and phenol. During the coating process, pH control is important to avoid dissolution of the ZnO as well as to obtain a good dispersion. Two kinds of polyelectrolyte dispersants were used to control the surface charge of the ZnO particles in aqueous media. As a result, poly(ethylenimine) (PEI) shifted the isoelectric point of ZnO from pH 9 to pH 10, whereas poly(ammonium acrylate) (PAA) made the surface charge of ZnO negative between pH 6 and pH 11. The change in the ZnO surface charge produced by adding polyelectrolyte dispersants makes it possible to obtain uniform silica–coated ZnO particle in aqueous media. UV–irradiation experiments showed that PEI, which can make the surface charge opposite to that of SiO2, is more effective in obtaining a thick silica coating on ZnO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2002.tb00384.x
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  • 4
    Electronic Resource
    Electronic Resource
    Thin Palladium Membrane Formed in Support Pores by Metal-Organic Chemical Vapor Deposition Method and Application to Hydrogen Separation (1994)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 33 (1994), S. 616-622 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00027a019
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  • 5
    Electronic Resource
    Electronic Resource
    Hydrogen-Permselective SiO2 Membrane Formed in Pores of Alumina Support Tube by Chemical Vapor Deposition with Tetraethylorthosilicate (1994)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 33 (1994), S. 2096-2101 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00033a011
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis of ultrafine titanium diboride particles by rapid carbothermal reduction in a particulate transport reactor (1997)
    Springer
    Journal of materials science 32 (1997), S. 3933-3938 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ultrafine TiB2 powders were synthesized by rapid carbothermal reduction in a vertical tubular reactor through which the particles fell freely. The starting materials were TiO2, H3BO3 and cornstarch, which were mixed and calcined at 400°C for 1 h. The calcined precursor was milled, sieved and then fed into the top of the reactor. The reduction was carried out between 1786–1791°C in a downward flow of argon. Product particles were recovered at the bottom of the reactor. When the precursor molar composition ratio was TiO2 : B2O3 : C=1 : 2 : 5.5, the carbon content in the product was 5 wt% and the crystallite size was 80 nm. The carbon content in the product was reduced to 2.9 wt% by a heat treatment in an H2 atmosphere for 9 h.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018664832203
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  • 7
    Electronic Resource
    Electronic Resource
    Case report of neuroendocrine carcinoma of the skin, histochemical and electron microscopic study (1983)
    Springer
    Virchows Archiv 401 (1983), S. 261-273 
    Details
    ISSN: 1432-2307
    Keywords: Neuroendocrine carcinoma ; Neuron specific enolase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A rare case of neuroendocrine carcinoma of the skin in a 83-year-old male Japanese was reported. Histological, electron microscopical and cytological studies were performed on the surgically removed tumor tissue and the cultured tissue. The tumor occurred at the junction of the dermis and subcutaneous tissue of the right elbow, and spread to the right brachial region and axilla. Histologically, the tumor consisted mostly of small anaplastic cells, closely resembling lymphocytes. They showed a characteristic uniformity without rosette or trabecular formation in the usual histological sections, but an epithelial-like arrangement of tumor cells was readily observable both in the tissue culture and imprint preparations. Grimelius' stain was weakly positive in the periphery of the cytoplasm. Neuron Specific Enolase (NSE) activity was high both in the serum and in the tumor mass. No gastro-enteropancreatic hormones were detected. Electron microscopically, membrane-bound granules of neurosecretory type, 90 to 170 nm in diameter were observed in the cytoplasm. These granules were characteristically distributed along the periphery of cytoplasm beneath the plasma membrane and in clusters in the cell processes. The tumor cells had sparse rudimentary desmosome-like junctions and a few cytoplasmic finger-like projections. Either a neurogenic or APUD cell origin of the tumor was suspected. The serum NSE value, suggesting to be a neurogenic origin before the histological examination in the present case, is considered to be a valuable marker substance for screening and therapeutic monitoring of neurogenic tumors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00734844
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  • 8
    Electronic Resource
    Electronic Resource
    Structure and dynamics of ovalbumin gels (1997)
    Springer
    Rheologica acta 36 (1997), S. 252-261 
    Details
    ISSN: 1435-1528
    Keywords: Ovalbumin ; gelation ; viscoelasticity ; SEM ; thermal behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Solvent effects on dynamical and thermal behaviors of ovalbumin (OVA) gels induced by thermal denaturation at high temperature of 160°C were studied from dynamic shear modulus measurement, shear creep and creep recovery measurement, and DSC measurement. Two organic solvents, glycerin (G) and ethylene glycol (EG), and their mixtures with water (W)(G/W and EG/W) were used as solvent for preparation of gels. Stable gels formed in pure glycerin took a fractal structure at OVA concentration C range of 15–45wt% at a temperature specific to respective C, whereas a fractal structure was not observed for gels prepared in EG, G/W, and EG/W. The results were consistent with thermal denaturation behaviors of OVA in these solvents. Morphologies of two gels prepared in water and glycerin were explored using high resolution SEM, which showed that a basic unit responsible for formation of OVA gels was spheres with a diameter ranging from 20 to 40 nm, being much larger than 5.6 nm of the diameter of native OVA, and a fractal structure was related to network formation accompanied by melting of those spheres.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00366666
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  • 9
    Electronic Resource
    Electronic Resource
    Structure and dynamics of ovalbumin gels (1997)
    Springer
    Rheologica acta 36 (1997), S. 252-261 
    Details
    ISSN: 1435-1528
    Keywords: Key words Ovalbumin ; gelation ; viscoelasticity ; SEM ; thermal behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Solvent effects on dynamical and thermal behaviors of ovalbumin (OVA) gels induced by thermal denaturation at high temperature of 160°C were studied from dynamic shear modulus measurement, shear creep and creep recovery measurement, and DSC measurement. Two organic solvents, glycerin (G) and ethylene glycol (EG), and their mixtures with water (W)(G/W and EG/W) were used as solvent for preparation of gels. Stable gels formed in pure glycerin took a fractal structure at OVA concentration C range of 15–45wt% at a temperature specific to respective C, whereas a fractal structure was not observed for gels prepared in EG, G/W, and EG/W. The results were consistent with thermal denaturation behaviors of OVA in these solvents. Morphologies of two gels prepared in water and glycerin were explored using high resolution SEM, which showed that a basic unit responsible for formation of OVA gels was spheres with a diameter ranging from 20 to 40nm, being much larger than 5.6nm of the diameter of native OVA, and a fractal structure was related to network formation accompanied by melting of those spheres.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00366666
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of substrate pretreatment on diamond deposition in a microwave plasma (1993)
    Springer
    Journal of materials science 28 (1993), S. 129-137 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The evolution of substrate surface at an early stage of diamond formation in a microwave plasma was studied with a high-resolution scanning electron microscope. Changes in the shape, size and population of diamond particles at the same points were observed at prescribed time intervals. The substrate used was a mirror-polished Si (100) plate which was ultrasonically pretreated with diamond, c-BN or α-Al2O3 powders prior to the deposition. The pretreatment introduced fragments of the abrasives as well as many scratches on the substrate surface. When the diamond and c-BN abrasive were used, diamond was formed on the surface of abrasive residues. With α-Al2O3 abrasive powder, on the other hand, residues vanished in the plasma and no deposition was observed. These results suggest that the deposition site of diamond from the vapour phase is dependent on the type of abrasive powder used for substrate pretreatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00349043
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