Fouling is a common, fundamental and costly problem in heat transfer systems, which reduces thermal efficiency of equipment, increases the energy loss and causes strong damage to the heat transfer equipment in various industries. The main causes of fouling on the heat transfer surfaces are salts with inverse temperature-solubility in the fluid which calcium sulfate is one of the most important ...

Two forms of proacrosin have been purified from ejacualted boar spermatozoa. The isolation method utilized benzamidine to inhibit the premeture activation of the zymogen and included pH precipitation, ammonium sulfate fractionation, and sodium chloride precipitation. Further purification was achieved by Sephadex G-200 FILTRATION OF THE PREPARATION AFTER IT WAS TREATED WITH 8 M urea. The overall...

This article addresses the design of a new photocatalytically active gypsum plaster. A hemihydrate in beta type is used as binder to design this material and a carbon modified TiO2 that can be activated by visible light is used as photocatalyst. An own developed test setup to assess the indoor air purification capacity of the developed material is presented. The new product possesses the indoor...

A calcium and calmodulin-dependent protein kinase has been purified from rat brain. It was monitored during the purification by its ability to phosphorylate the synaptic vesicle-associated protein, synapsin I. A 300-fold purification was sufficient to produce kinase that is 90-95% pure as determined by scans of stained sodium dodecyl sulfate-polyacrylamide gels and has a specific activity of 2....

Additives were selected, and a method for modifying the structure of gypsum-containing materials construction purposes their dispersion developed. Based on selected modifiers, effective compositions composite based local secondary raw An increase in strength resistance to water was established. The use gypsum plaster mixes shows high efficiency advantages compared traditional finishing works me...

OBJECTIVE To determine the most effective tocolytic agent at delaying delivery. DESIGN Systematic review and network meta-analysis. DATA SOURCES Cochrane Central Register of Controlled Trials, Medline, Medline In-Process, Embase, and CINAHL up to 17 February 2012. STUDY SELECTION Randomised controlled trials of tocolytic therapy in women at risk of preterm delivery. DATA EXTRACTION At l...