objective(s): recently we reported that the soybean 15-lipoxygenase (slo) inhibitory activity of pyrimido[4,5-b][l,4]benzothiazines largely depends on the orientation of sulfur atom of thiazine core towards feiii-oh in the active site pocket of the enzyme with subsequent oxidation of sulfur to sulfoxide. in this paper the results of a comparative study on the slo inhibitory activities of the me...

background: high amount of heavy metals in sludge is one of the major obstacles to its use on farms. the present study aimed to investigate the possibility of leaching heavy metals from wastewater sludge by fenton method and determine the optimum level of parameters, such as iron, hydrogen peroxide, time, and ph for fenton reaction.   methods: the effects of various parameters, such as ph (2-9)...

Oxygen free radicals, including hydrogen peroxide, may mediate oxidative stress in target organ tissues and contribute to cardiovascular complications in hypertension. To examine heritability of hydrogen peroxide production, we investigated this trait in a family-based cohort consisting of family members (n=236) ascertained through probands (n=57) with essential hypertension. Significant effect...

the thermodynamic of the known and very effective catalytic system, hydrogen peroxide (h2o2) and methyltrioxorhenium (mto) is studied in different solvents using uv-visible spectroscopic method. the thermodynamic parameters (δg, δh and δs) for two equilibrium reactions, mto + h2o2 ⇌ a + h2o and a + h2o2 ⇌ b.h2o (a, [mere(o)2(o2)]; b.h2o, [mere(oh2)(o)(o2)2]), are determined. the obtained free e...

OBJECTIVE This study evaluated the effects of carbamide peroxide and hydrogen peroxide on the biaxial flexural strength and flexural modulus of bovine dentin. MATERIALS AND METHODS Thirty coronal dentin disks (0.5 mm thick × 6.0 mm diameter) were prepared from bovine teeth. The disks were randomly divided into three groups (n=10): A control group (unbleached), a group bleached with 10% carbam...

Stern (1) has found that as much as 0.13 N ethyl hydrogen peroxide is required to give 50 per cent inhibition of the destruction of hydrogen peroxide by catalase. This is difficult to understand in view of the high affinities of catalase for ethyl hydrogen peroxide in both the primary and secondary compounds (~2 X 10” M) (2), in which all the catalase hematins are bound to ethyl hydrogen peroxi...