objective: determination and comparison of the effect of infusion time on the antioxidant activity and total polyphenol contents of bagged and loosely packed black teas. materials and methods: for twenty loosely packed and eleven bagged tea samples, the antioxidant activity and total polyphenol content were analyzed using frap and folin-ciocalteau methods, respectively. the anova with tukey pos...

nanomagnetite-fe3o4 is used as a highly efficient, mild, green and recyclable nanomagnetite catalyst for the synthesis of 4,4´-(arylmethylene)-bis(3-methyl-1-phenyl-1h-pyrazol-5-ol) derivatives in solvent-free conditions. the condensation reaction of 3-methyl-1-phenyl-1h-pyrazol-5(4h)-one with aromatic aldehydes affords the title compounds in high yields and short reaction times. the nanocataly...

Searching for unknown earthquakes in Slovenia the first millennium, we performed archaeoseismological analysis of Roman settlements. The Mesto pod mestom museum Celje exhibits a paved road, which suffered severe deformation. Built on fine gravel and sand from Savinja River, road displays bulge trench, pop-up structures, pavement slabs tilted up to 40°. city wall was built over deformed Late tim...

Nanomagnetite-Fe3O4 is used as a highly efficient, mild, green and recyclable nanomagnetite catalyst for the synthesis of 4,4´-(arylmethylene)-bis(3-methyl-1-phenyl-1H-pyrazol-5-ol) derivatives in solvent-free conditions. The condensation reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with aromatic aldehydes affords the title compounds in high yields and short reaction times. The nanocataly...

This study examined changes in soil enzymatic activity caused by constant mineral fertilization with NPK and diversified Fe Mo micronutrients. A field experiment was conducted a completely randomized design four replications Siedlce (central-eastern Poland) between 2012 2014. Alfalfa (Medicago sativa L.) used as the test plant. The first factor consisted of treatments: control; NPK; NPKFe1; NPK...