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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and specific pressor activity of [1-aspartic acid, 5-valine, 9-serine]angiotensin I ("fowl and angiotensin I") (1977)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 20 (1977), S. 315-316 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00212a029
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  • 2
    Electronic Resource
    Electronic Resource
    The detection of small differences in lattice constant at low temperature by an energy-dispersive X-ray diffractometer (1976)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 9 (1976), S. 286-290 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A cryostat has been designed for an energy-dispersive X-ray diffractometer so that the specimen can be measured between 1.48 K and room temperature. Three powder samples can successively be measured at a fixed temperature by rotating the cryostat in steps of 120°. This design is very suitable particularly for detecting a slight change or difference, if any, in lattice constant among samples. A typical example is described of detecting the difference in lattice constant between 92Mo and 100Mo.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889876011370
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  • 3
    Electronic Resource
    Electronic Resource
    Amino acid synthesis through biogenetic-type CO 2 fixation (1975)
    [s.l.] : Nature Publishing Group
    Nature 256 (1975), S. 60-61 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] CH3P-〉CH3C-CoA (1) During attempts to prepare some artificial photosynthetic models, we have discovered a similar biogenetic-type reaction which uses a simple catalyst modelling ferredoxin activity. As catalysts, we used some known iron-sulphur complexes such as Sohrauzer's complex2, Yang's ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/256060a0
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  • 4
    Electronic Resource
    Electronic Resource
    Archaeomagnetism in Iran (1972)
    [s.l.] : Nature Publishing Group
    Nature 236 (1972), S. 223-225 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Map of Iran. Solid circles show sampling sites. Fig. 2 Change of the geomagnetic declination. From the kiln sites and other fireplaces excavated in eastern Iran more than 400 baked earths were orientated in situ, removed from the ground and then transported carefully to Osaka University ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/236223a0
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  • 5
    Electronic Resource
    Electronic Resource
    Nitrosylhemoglobin and carboxyhemoglobin in the blood of mice simultaneously exposed to nitric oxide and carbon monoxide (1976)
    Springer
    Bulletin of environmental contamination and toxicology 16 (1976), S. 582-587 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01685368
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  • 6
    Electronic Resource
    Electronic Resource
    Use of nitrogen mustard N-oxide for the fixation of electron microscopic tissues (1978)
    Springer
    Histochemistry and cell biology 58 (1978), S. 49-56 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Nitrogen mustard N-oxide was tried for the fixation of tissue for electron microscopy. A fixative consisting of 1% nitrogen mustard N-oxide, 1% glutaraldehyde and 1% paraformaldehyde buffered at pH 7.4 followed by 1% OsO4 buffered at pH 7.4 was found useful for the tissues examined: thyroid, anterior pituitary, adrenal gland and oviduct of mice. If the tissues are fixed and the sections are stained with uranyl acetate and lead acetate doubly, the follicle colloid, colloid droplets, and secretory granules containing thyroglobulin in the thyroid become higher in electron density. The cisterna of the maturing face of the Golgi apparatus, secretory granules, ribosomes, nucleolus and chromatin in the cells examined are extremely electron dense. Tubular elements of smooth endoplasmic reticulum in the adrenal cortical cell and microtubules in all the cells examined are also well preserved. The fixative containing nitrogen mustard N-oxide is useful also for cytochemistry. Using tissue fixed by this method and stained en bloc by uranyl acetate, the noradrenaline and adrenaline cells in the adrenal medulla are clearly distinguished by light microscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00489948
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  • 7
    Electronic Resource
    Electronic Resource
    Electronic spectra of Hafner's hydrocarbons (1970)
    Springer
    Theoretical chemistry accounts 18 (1970), S. 255-257 
    Details
    ISSN: 1432-2234
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Electronic structures and spectra of Hafner's hydrocarbons have been calculated by means of the semi-empirical SCF CI MO method incorporated with the variable bond-length technique. The results are in good agreement with experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00527340
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of syndiotacticity on the aqueous poly(vinyl alcohol) gel 2. Syneresis of gel (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 456-461 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Der Mechanismus der Synärese an wäßrigen Gelen von Polyvinylalkohol, reich an syndiotaktischem Anteil, wurde mit steigender Temperatur untersucht, wobei der Polyvinylalkohol in Bezug auf seinen Gehalt an syndiotaktischen Diaden zwischen 58,4 und 66,2% variiert. Die Synärese wurde gewichtsmäßig verfolgt. Die Synärese hängt von der Syndiotaktizität und der Gelierungstemperatur ab. Gele, erstarrt bei tieferen Temperaturen mit einer Syndiotaktizität von 60,9%, zeigten beträchtliche Synärese mit steigender Temperatur. Das Maximum an Synärese wurde zwischen 60,9 und 64,2% Syndiotaktizität beobachtet. Das Phänomen der Synärese ist nicht thermisch reversibel. Die Synärese läuft ab unter Zusammenbruch von unstabilen Bindungen und weiterem Wachstum der Kristallite.
    Notes: Summary The mechanism of syneresis of an aqueous gel of syndiotacticity-rich poly(vinyl alcohol) (PVA) with the rise of temperature was studied using the PVA having the content of syndiotacticity in diad from 58.4 to 66.2%. The extent of syneresis was estimated by gravimetry. Syneresis of gel with the rise of temperature depends upon the syndiotacticity and gelling temperature. The gel chilled at lower temperature of PVA having the content of syndiotacticity in diad above 60.9% showed remarkable syneresis with the rise of temperature. The maximum of the extent of syneresis appeared between the content of syndiotacticity in diad of 60.9% and that of 64.2%. The phenomena of syneresis was not thermally reversible. Syneresis occurs accompanying the breakdown of the unstable junction and further growth of the crystallite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410910
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of syndiotacticity on the aqueous poly(vinyl alcohol) gel 3. Mechanical property of gel (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 553-558 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Es wurden die mechanischen Eigenschaften wαßriger Gele aus Polyvinylalkohol untersucht, mit Gehalten an Syndioaktizität in Diaden zwischen 58,4 und 66,2%. Die elastischen Moduln der Gele lagen bei 105 bis 106 dyn/cm2 und die Variation der elastischen Moduln der Gele mit Steigerung der Temperatur entsprach der Konzentrationsänderung von Polyvinylalkohol im Gele gemäß der stattgefundenen Synärese. Der elastische Modul des Gels mit konstantem Gehalt an Syndiotaktizität und Konzentration des PVA steigen in folgender Weise: Zuerst das Gel abgekühlt bei Raumtemperatur, dann das Gel abgekühlt bei 60 °C und zuletzt das Gel erstarrt bei 0 °C. Die Variation der elastischen Moduln mit steigender Temperatur wird kleiner mit steigendem Gehalt an Syndiotaktizität. Das Anwachsen der Moduln sollte vermutlich dem weiteren Wachstum strengerer Kopp lungen durch Rekristallisation infolge der Synärese zuzuschreiben sein mehr als einem Entropieeffekt der polymeren Netzwerke mit steigender Temperatur.
    Notes: Summary The mechanical property of aqueous gel was studied using the PVA having the content of syndiotacticity in diad from 58.4 and 66.2%. The elastic modulus of gels was 105–106 dyne/cm2 and the variation of the elastic modulus of gel with the rise of temperature was corresponded with the variation of the concentration of PVA in gel accompanying syneresis. The elastic modulus of gel having the same content of syndiotacticity and concentration of PVA increased in the order as follows, the first is the gel chilled at room temperature, the second is the gel chilled at 60 °C and last is the gel chilled at 0 °C. The variation of the elastic modulus of gel with the rise of temperature became smaller with increasing content of syndiotacticity. The increase of elastic modulus is considered to be attributed to the further growth of stronger junctions through the recrystallization followed by syneresis rather than the entropic effect of polymer networks with the rise of temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01382571
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of syndiotacticity on the aqueous poly(vinyl alcohol) gel 4. X-ray diffraction analysis of gel (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 982-988 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Es wurden mit Röntgeninterferenzen die Strukturen von einem Polyvinylalkohol-Wasser-Gel mit syndiotaktisch angereichertem Polyvinylalkohol untersucht. Es erscheinen diffuse Halos in dem Gel, das aus niedrigeren wäßrigen Lösungen (5% PVA) präpariert wurde. Doch wurden die Beugungsinterferenzen schärfer mit steigender Konzentration an PVA. Died-Abstände in Gelen und Filmen stimmten miteinander überein. Die Halbwertsbreite der 101-Interferenzen, gemessen mit einem Photodensitometer, nahm mit steigender Syndiotaktizitat des PVA ab. Der Trägheitsradius des Gels aus Guinier-Auftragungen für die Kleinwinkelstreuung nimmt mit steigender Syndiotaktizitat zu. Diese Ergebnisse legen nahe, daß die syndiotaktische Segmentläange mit steigendem Gehalt an Syndiotaktizitat zunimmt und daß die Kristallite in den Gelnetzwerken mit zunehmender Syndiotaktizität gröBer wurden. Die mittlere Größe des Netzwerkabstandes ist 73–89 Å (s-(diad)% = 49.4-66.2).
    Notes: Summary The structure of syndiotacticity-rich poly(vinyl alcohol) (PVA)-water gel was investigated by the X-ray diffraction analysis. Diffuse haloes appeared in the gel prepared from lower aqueous solution of PVA (5 wt%) but diffraction pattern became sharper with increasing concentration of PVA. Thed-spacings of gels and films are agreed with each other. The half height width of value of peak position of (101) obtained by photodensitometer decreased with increasing syndiotacticity of PVA. The radius of gyration of gel obtained from theGuinier's plots by the small angle X-ray diffraction increases with increasing syndiotacticity. These results suggest that the syndiotactic sequence length increases with increasing content of syndiotacticity and the crystallites in gel networks become also larger with increasing syndiotacticity. The average size of gel junction is 73–89 Å (s-(diad)% = 49.4-66.2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01516915
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