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Article
Determination of Endogenous Formaldehyde in Plants (Fruits) Bound to L-Arginine and its Relation to the Folate Cycle, Photosynthesis and Apoptosis
A very powerful nucleophilic reagent, hydralazine(l-hydrazino-phtalazine) proved to be suitable for determination of the endogenous formaldehyde level in biological samples. It was found that in different plan...
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Article
The Hydrazine Derivative Aminoguanidine Inhibits the Reaction of Tetrahydrofolic Acid with Hydroxymethylarginine Biomolecule
Aminoguanidine (AG), a hydrazine derivative is known to inhibit the formation of Advanced Glycosylation Endproducts (AGE) and AG has been proposed as an agent in prophylaxis of diabetic complications. However,...
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Article
Analogies and Differences in the Excited Reactions of Formaldehyde and D-Glucose
The investigations proved that D-glucose (as reducing sugar) can easily be activated in a ternary system (L-lysine : D-glucose : H2O2) similarly to formaldehyde at 20 °C, in pH = 7.4 forming chemiluminescence (CL...
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Article
Determination of endogenous formaldehyde level in human blood and urine by dimedone-14C radiometric method
Radiometric method was developed for the analysis of endogenous formaldehyde in human blood and urine using dimedone-14C reagent. The method based on that dimedone /5,5-dimethyl-cyclohexane-1, 3-dione/ can very e...
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Article
Radiometric titration based on colloidal and slow precipitate formation
Fluoride ions and, in about 0.005M concentration, tungstate ions form gelatinous precipitates, poorly soluble in water, with calcium ions. The radiometric determinations of the above ions are based on these react...
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Article
Investigation and radiometric determination of saturated and unsaturated aliphatic monocarboxylic acids and aromatic dicarboxylic acids
Investigations have been carried out on the precipitation of calcium salts of saturated and unsaturated aliphatic monocarboxylic acids and of aromatic dicarboxylic acids. The optimum ethanol/water solvent rati...
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Article
Investigation and radiometric determination of saturated and unsaturated aliphatic dicarboxylic acids
Radiometric determination of saturated and unsaturated aliphatic dicarboxylic acids has been developed using a precipitation reaction. The influence of the conditions of precipitation, the composition of the c...
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Article
Anwendung von Mikromethoden in der organischen Isotopengasanalyse
Verfahren zur radiochemischen Analyse organischer Substanzen, die mit14C, Tritium bzw.35S markiert sind, wurden angegeben. Diese ähnlich der organischen Mikroanalyse durchführbaren Methoden beruhen auf Messungen ...
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Article
Radiometric determination of 8-hydroxyquinoline and its derivatives with calcium chloride reagent solution labelled by45Ca
Radiometric titrations are reported based on the formation of poorly soluble chelate complexes of 8-hydroxyquinoline and its derivatives with calcium ions. Calcium chloride reagent solution labelled with45Ca was ...
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Article
Titrating apparatus for the detection of soft β-emitting isotopes
The measuring devices reported in the literature allow only radiometric titrations indicated by hard β or γ-radiating isotopes. The authors developed an apparatus also suitable for the detection of soft β-emit...
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Article
Über die substöchiometrische Extraktion und Bestimmbarkeit von Quecksilberionen in Form ihres Bromidkomplexes
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Article
The cortisol metabolism of human pulmonary tumour tissue
Bösartige Lungengeschwulstgewebe verschiedener Zelltypen wurden mit Hydrocortison 13H, 23H inkubiert. Die freien, markierten Steroide wurden extrahiert, chromatographisch getrennt und identifiziert.
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Article
Schnellverfahren zur Gasanalyse des Radiokohlenstoffes unter Atmosphärendruck
Zur Aktivitätsmessung von14C-markierten Substanzen wurde ein Verfahren ausgearbeitet, das die Durchführung der Messungen ohne die Verwendung eines Vakuumapparates mittels einer einfachen Vorrichtung ermöglicht. D...
