In phosphate buffer, the degradation of ATZ by ozone/(O3/H2O2) under various circumstance was explored and mechanism dynamics were probed. The findings revealed that when maintaining reaction temperature at 25 °C, H2O2 concentration O3 20 mol/L mol/L, respectively. Moreover, rate 5 influence O3/H2O2 92.59% in buffer pH7. analysis showed HO• underwent co-oxidized oxidation ratios close to 1:1 ac...

The soluble activity in lymphocytes which converts phosphatidylinositol into 1,2-diacylglycerol and inositol phosphates requires Ca(2+) ions. At pH7 maximum activity occurs at [Ca(2+)](free) approximately 0.7mum whereas at pH5.5 the equivalent value is approx. 50mum. At [Ca(2+)](free) approximately 1mum, a concentration similar to common intracellular values, essentially all activity is confine...

Homopurine-homopyrimidine mirror repeats are known to adopt the H form under acidic pH and/or negative supercoiling. In H-DNA, one half of the purine strand enters the triplex whereas the second half is unstructured and can form duplex with complementary oligonucleotide. However, because the same oligonucleotide can form triplex with the homopurine-homopyrimidine insert, one could expect that o...

The abrasive and adhesive wear behaviour of metallic bonds can be significantly affected by varying pH values the attacking medium. However, knowledge about value influence on diamond impregnated bits used in core drilling industry is still limited. One recent publication shows advantage modifying a standard ASTM B611-13 test to investigate segment bond material neutral regime (pH7). This study...

In order to mimic the active center of matrix metalloproteinases (MMPs), we synthesized a pentadecapeptide (Ac-KAHEFGHSLGLDHSK-NH2) corresponding to the catalytic zinc(II) binding site of human MMP-13. The multi-domain structural organization of MMPs fundamentally determines their metal binding affinity, catalytic activity and selectivity. Our potentiometric, UV-visible, CD, EPR, NMR, mass spec...

1. Reaction of 2-(N-acetoxy)-acetamidofluorene with orthophosphate buffer at pH7 yielded a large quantity of water-soluble fluorene derivatives, which showed absorption peaks at 303, 290 and 280nm. Tris buffer under similar conditions gave negligible reaction. 2. Hydrolysis of polar material with acid or alkaline phosphatases liberated equimolar amounts of inorganic phosphate and an ether-extra...

Poly (viny1 alcohol) (PVA) of 72000 g mol -1 molar mass was cross linked through cold cast esterification with different % MA and EDTA (10 , 20 30 ), two mixture l (20 %/5% 20%/10% .Molecular structures the produced membranes were identified by FTIR spectral analysis .Mechanical measurements showed that, PVA mol% gave higher tensile strength value, while 30mol% elongation value at break.Water s...

1. ac-N-Methyl-oc-N-toluene-p-sulphonyl-L-lysine ,B-naphthyl ester (MTLNE) was synthesized as its hydrobromide and shown to be slowly hydrolysed by bovine pancreatic trypsin. The acylation step, however, is so much faster than deacylation of the acyl-enzyme that spectrophotometric measurement of the 'burst' of ,B-naphthol provides a convenient method for determining the absolute molarity of try...