A general model of co-open&iv&y is developed and solved explicitly ; it combines the concepts of preferential binding and quaternary constraints (due to Monod, Wyman & Ghsngeux), nearest-neighbor subunit interactions (due to Koshland), and changes in subunit aggregation (due to Briehl). For this reason, the general model can explain systems which previous models cannot-eg. the model of Monod, W...

UNLABELLED BACKGROUND The design and applications of antimicrobial polymers is a growing field. Antimicrobial polymers can help to solve the problems associated with the use of conventional antimicrobial agents. Polymers with active functional groups can act as a carrier system for antimicrobial agents. In our study, we aim to prepare and develop some antimicrobial polymers for biomedical ap...

A common consequence of using agricultural fungicides is the development of resistance by fungal pathogens, which undermines reliability of fungicidal effectiveness. A potentially new strategy to aid in overcoming or minimizing this problem is enhancement of pathogen sensitivity to fungicides, or "chemosensitization." Chemosensitization can be accomplished by combining a commercial fungicide wi...

A virulent strain of Diaporthe gulyae, isolated from stem cankers of sunflower and known to be pathogenic to saffron thistle, has been shown to produce both known and previously undescribed metabolites when grown in either static liquid culture or a bioreactor. Together with phomentrioloxin, a phytotoxic geranylcyclohexenetriol recently isolated from a strain of Phomopsis sp., two new phytotoxi...

Anaerobic biodegradation of phenanthrene (PHE) was investigated using an enrichment culture consists predominantly of sulfate-reducing bacteria (87+/-6%). Aqueous biodegradation experiments were designed using the rotatable central composite design with five levels. The designed concentrations were 2-50 mg L(-1) for PHE, 480-3360 mg L(-1) for sulfate, and 5-50 mg L(-1) for initial biomass. Expe...

Thiosemicarbazones are class of compounds which obtained by the condensation thiosemicarbazide with carbonyl compounds. The transition metal complexes thiosemicarbazones widely considered due to their broad spectrum biological activities such as antibacterial, antitumor and antifungal activities. In present research work a series four novel Cu(II) aryl having general composition [Cu(L1)2Cl2], [...