Humic substances (HS) are macromolecular organic materials ubiquitous in both aquatic and terrestrial systems, effective electron shuttling compounds providing macro- microelements organochelate form, play an important role determining the mobility bioavailability of organic/inorganic nutrients mineral fertilizers [...]

Developments in chromato-polarography and the results obtained from its application to the analysis of mixtures of organic compounds are presented. The possibility of determining traces of organic impurities in organic substances by this technique is evaluated. The polarographic method is today one of the most important instrumental methods and has found wide application in analytical chemistry...

Mercury is one of the most toxic substances known to humans. It has been introduced into the human environment and has also been widely used in medicine. Since circumstantial evidence exists that the pathology of Alzheimer's disease (AD) might be in part caused or exacerbated by inorganic mercury, we conducted a systematic review using a comprehensive search strategy. Studies were screened acco...

HOWLAND AND KRAMER [1923] showed that in rickets the concentration product of calcium and inorganic phosphorus falls below a certain critical level. Their work suggested a fundamental relationship between the levels of Ca and inorganic P of the blood. Bourne and Campbell [1932] by simultaneous determinations of calcium and inorganic P of the blood in rabbits have shown that the concentrations o...