the main objective in the present study was to assess the spatial variation of chemical and physical soil properties and then use this information to select an appropriate area to install a pasture rehabilitation experiment in the zereshkin region, iran. a regular 250 m grid was used for collecting a total of 150 soil samples (from 985 georeferenced soil pits) at 0 to 30, and 30 to 60 cm layers...

the purpose of this paper was to review the commercially available periodontal dressings, their physical and chemical properties, biocompatibility and therapeutic effects. electronic search of scientific papers from 1956 to 2012 was carried out using pubmed, scopus and wiley interscience search engines using the searched terms periodontal dressing, periodontal pack. numerous in vitro and in viv...

In 1903, Arthur Cushny, Professor of Materia Medica and Therapeutics at the University of Michigan, published an article in the Journal of the American Medical Association entitled “The Pharmacologic Action of Drugs: Is It Determined by Chemical Structure or by Physical Characters(1)?” To a chemist today, this question might seem odd. The physical properties of a drug and its chemical structure...

Artificial influence: We describe a semi-artificial adenosylpeptide B(12) that behaves as a cofactor in B(12)-dependent enzymatic reactions and demonstrate that the peptide backbone influences its chemical properties and modulates its bioactivity in vitro and in vivo. Inhibition of the growth of L. delbrueckii is demonstrated, thus providing a potentially powerful approach for the development o...

Enzymes are tremendously proficient catalysts, which can be used as extracellular catalysts for a whole host of processes, from chemical synthesis to the generation of novel biofuels. For them to be more amenable to the needs of biotechnology, however, it is often necessary to be able to manipulate their physico-chemical properties in an efficient and streamlined manner, and, ideally, to be abl...

Dendrimers are a new class of polymeric materials. They are highly branched, monodisperse macromolecules. The structure of these materials has a great impact on their physical and chemical properties. As a result of their unique behaviour dendrimers are suitable for a wide range of biomedical and industrial applications. The paper gives a concise review of dendrimers' physico-chemical propertie...