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  • 1
    Electronic Resource
    Electronic Resource
    Chemical Nature of the Cell Wall of the Green Algae, Codium , Acetabularia and Halicoryne (1960)
    [s.l.] : Nature Publishing Group
    Nature 185 (1960), S. 178-179 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As a continuation of the biochemical researches of algal cell wall by one of us4, we have been engaged in the study of the cell-wall constituents of the green algae from different taxonomie groups with the view of obtaining information about the phylogeny and systematic position. The present ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/185178a0
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  • 2
    Electronic Resource
    Electronic Resource
    Xylan of Siphonaceous Green Algae (1960)
    [s.l.] : Nature Publishing Group
    Nature 187 (1960), S. 82-83 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the course of our work on the cell wall constituents of green algae we have found that each of the main cell walls of Bryopsis maxima, Caulerpa anceps, Halimeda cuneata and Chlorodesmis formosana consisted not of cellulose but of xylan, in which xylose residues are linked by a 1,3-bond. Besides ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/187082a0
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  • 3
    Electronic Resource
    Electronic Resource
    Application of microcolumn ion chromatography using octadecylsilica immobilized with bovine serum albumin as stationary phase for the determination of inorganic anions (1997)
    Springer
    Fresenius' journal of analytical chemistry 357 (1997), S. 466-468 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Microcolumn ion chromatography of inorganic anions has been studied using octadecylsilica immobilized with bovine serum albumin as a stationary phase. The analytes were monitored with a conductivity detector. The detection limits for chloride, nitrate and thiocyanate at S/N = 3 were 0.8, 1.0 and 3.0 μmol L–1, respectively. The present system was applied to the determination of inorganic anions in tap water and serum samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050191
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  • 4
    Electronic Resource
    Electronic Resource
    Formation of Aryl β - D -Fructofuranoside by Enzymatic Transglycosylation (1964)
    [s.l.] : Nature Publishing Group
    Nature 202 (1964), S. 291-291 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The purification procedure of yeast invertase was based mainly on acetone precipitation and chromatography on 'Duolite (7-10'8. The purified invertase solution was free of most other carbohydrases including a-glucosidase. Fructose and fructoside were estimated colorimetrically by the method of Roe ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/202291a0
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  • 5
    Electronic Resource
    Electronic Resource
    Specificities of Several Acid Phosphatases from Plant Sources (1964)
    [s.l.] : Nature Publishing Group
    Nature 203 (1964), S. 939-940 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] UNLIKE the phosphatases of animal origin1, those from vJ plant sources have so far been examined only to a limited extent and some of the reported results are incompatible with each other. The possible identity of hosphomonoesterase and pyrophosphatase in higher plants has been suggested by some ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/203939a0
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  • 6
    Electronic Resource
    Electronic Resource
    Anodic stripping voltammetry of copper and bismuth (1975)
    Springer
    Microchimica acta 63 (1975), S. 125-131 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Mikrogramm- und Nanogrammengen Kupfer und Wismut wurden aus 10-m flußsauren, 1-m salpetersauren Lösungen elektrolytisch an einer Glas- kohleelektrode abgeschieden und nachher in 0,1-m Perchlorsäure oder 0,1-bis 12-m Salzsäure anodisch gelöst, wobei eine Stromspannungskurve aufgezeichnet wurde. Auf diese Art wurden ppb-Mengen Kupfer und Wismut innerhalb 3 Stunden in Zirkoniumschwamm unter Verwendung von 5-m Salzsäure als Elektrolyt bei der anodischen Auflösung bestimmt.
    Notes: Summary Microgram and nanogram quantities of copper and bismuth are electrodeposited on a glassy carbon electrode from 10M hydro-fluoric-1M nitric acid solutions. The deposit is then anodically removed in 0.1M perchloric acid or 0.1–12M hydrochloric acid, a current-voltage curve being recorded. Copper and bismuth at p. p. b. levels in sponge zirconium are determined by this technique with 5 M hydrochloric acid as stripping electrolyte within 3 hours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01271529
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  • 7
    Electronic Resource
    Electronic Resource
    Determination of trace heavy metals associated with suspended particulate matter in pond water by microscale anodic stripping voltammetry (1984)
    Springer
    Microchimica acta 84 (1984), S. 259-264 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Weniger als 1 mg suspendierter Teilchenmaterie wurde durch Zentrifugieren abgetrennt, mit 22μl eines Gemisches HClO4∶HNO3∶HF (2∶10∶10) zersetzt und darin Cu, Pb, Cd und Zn durch„Differential-Pulse-Anodic-Stripping-Voltammetry“mit hängender Hg-Tropfelektrode in 300μ l 0.06M Perchlorsäure bestimmt. Das Verfahren ist einfach und schnell, es bedarf dazu nur eines Mikrokölbchens aus Teflon.
    Notes: Summary Less than 1 milligram of suspended particulate matter in a 50-ml water sample was separated by centrifugation, decomposed with 22μl of 2∶10∶10 perchloric-nitric-hydrofluoric acid mixture, and analyzed for copper, lead, cadmium and zinc by microscale differential pulse anodic stripping voltammetry with a hanging mercury drop electrode in 300μl of 0.06M perchloric acid. The procedure was simple and rapid, because a single Teflon microvessel was used throughout the whole procedure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01212390
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  • 8
    Electronic Resource
    Electronic Resource
    Determination of traces of heavy metals in positively charged inorganic colloids in fresh waters (1985)
    Springer
    Microchimica acta 87 (1985), S. 289-296 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Determination of Traces of Heavy Metals in Positively Charged Inorganic Colloids in Fresh Waters After removal of suspended particulate matter by centrifugation followed by filtration through 0.4-μm membrane filters, humic substances and other negatively charged species are sorbed on a small column of macroreticular weak-base anion exchanger DEAE-Sephadex A-25 at fast flow rates. Positively charged inorganic colloids pass through the column and are collected on a 0.015-μm membrane filter, which is then ultrasonically treated with 1M nitric acid for the determination of copper, lead and cadmium by differential pulse anodic stripping voltammetry with a static mercury drop electrode. Up to O.2μg 1−1 of the heavy metals are found in positively charged inorganic colloids in river, pond and tap waters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01197008
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  • 9
    Electronic Resource
    Electronic Resource
    Determination of traces of lead in titanium dioxide powder by microscale anodic stripping voltammetry (1983)
    Springer
    Microchimica acta 81 (1983), S. 245-251 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine Einwaage von 1–10 mg Titandioxid wird mit 35μl 28M Flußsäure in einem geschlossenen Teflongefäß aufgeschlossen. Im selben Gefäß werden mehr als 95% der anwesenden Bleimenge aus 250μl Elektrolyt bei pH 4,3 an einer glasförmigen Kohle-Mikroelektrode abgeschieden und der Differential-Puls-Anodic-Stripping-Voltammetrie zugeführt. Geringe Bleimengen lassen sich mit Hilfe dieses Verfahrens mit einem Fehler von weniger als 5% innerhalb einer Stunde bestimmen.
    Notes: Summary A 1- to 10-mg sample of titanium dioxide powder is decomposed with 35μl of 28M hydrofluoric acid in a closed Teflon microvessel. In the same vessel, more than 95% of lead is electrodeposited on a glassy carbon microelectrode from 250μl of electrolyte at pH 4.3 for differential pulse anodic stripping voltammetry. Low ppm of lead is determined by the proposed method with an error of less than 5% within 1 h.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01497615
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  • 10
    Electronic Resource
    Electronic Resource
    Determination of traces of chlorine in tantalum metal by cathodic stripping voltammetry (1970)
    Springer
    Microchimica acta 58 (1970), S. 452-456 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Bruchteile weniger Mikrogramm Chloridionen werden aus einer Flußsäure-Salpetersäurelösung, die 0,1 g Tantal enthält, elektrolytisch an einer Silbermikroanode abgeschieden. Die abgeschiedene Menge wird dann kathodisch in eine Kaliumnitratlösung übergeführt, wobei eine Stromspannungskurve aufgezeichnet wird. Der Vorteil dieser Vorgangsweise ist ihre hohe Empfindlichkeit, ihre hervorragende Genauigkeit und Einfachheit.
    Notes: Summary Fractional to a fewμg of chloride ion is electrodeposited on a silver microanode from a hydrofluoric-nitric acid solution containing 0.1 g of tantalum. The deposit is then cathodically removed in a potassium nitrate solution, a current-voltage curve being recorded. The advantages of this method are high sensitivity, excellent precision, and simplicity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01224144
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