a newly developed natural rubber deproteinization process produces deproteinized natural rubber (dpnr) wastewater as an intermediate product containing a high concentration of sodium dodecyl sulfate (sds) and rubber. in this study, a novel process to recover the residual rubber and energy as methane from dpnr wastewater was developed. as a pretreatment, sds and residual rubber in dpnr wastewate...

aquaculture is among the oldest occupations of human being. over the past quarter of century, the aquaculture industry has grown rapidly. the effect of water containing sodium sulfate on long term compressive strength of concrete of fishing ponds and channels is investigated in this paper. aim of this paper was to analyze the strength of concrete channels and of aquaculture which are in direct ...

Aqueous two-phase (ATP) systems are useful in the separation of, particularly, biomolecules. These form when an aqueous solution’s concentrations of phase-forming compounds (such as polymers like polyethylene glycol and salts) within envelope. Various physical chemical conditions affect ATP phase formation, such temperature, pH, composition. One set chemicals which has not been characterized te...

The stop-flow method has been used to study various aspects of renal tubular transport mechanisms. According to this method, aldosterone promotes the tubular reabsorption of sodium in the distal tubule. The method also indicates that the secretion of potassium, hydrogen and ammonium occurs in a very distal portion of the nephron. The substitution of anions such as ferrocyanide, sulfate and phos...

OBJECTIVES To find a suitable method for detecting zinc sulfate in adulterated urine. METHODS Two rapid spot tests to detect the presence of zinc sulfate in urine were developed. RESULTS Addition of 3 to 4 drops of 1N sodium hydroxide solution to approximately 1 mL of urine containing zinc sulfate led to the formation of a white precipitate, which was soluble in excess sodium hydroxide. In ...

The stop-flow method has been used to study various aspects of renal tubular transport mechanisms. According to this method, aldosterone promotes the tubular reabsorption of sodium in the distal tubule. The method also indicates that the secretion of potassium, hydrogen and ammonium occurs in a very distal portion of the nephron. The substitution of anions such as ferrocyanide, sulfate and phos...

Nanocrystalline Ni-W alloys having both high ductility and high strength were produced by electrodeoisition. The plating bath for the electrodeposition contained nickel sulfate, citric acid, sodium tungstate and ammonium chloride, and was operated at various bath concentrations and conditions of electrolysis. The ductility and tensile strength of the deposited alloys are strongly influenced by ...

an efficient, mild and environmentally friendly method was reported for the synthesis of an efficient, mild and environmentally friendly method was reported for the synthesis of pyranopyroles from aryl aldehydes, ethyl acetoacetate, malononitrile and hydrazine hydrate in the presence of catalytic amounts of methyl imidazolium hydrogen sulfate ([hmim][hso4]) as an efficient catalyst. these synth...

A study of the distribution of S35 in the rat, 14 to 16 hours after the intraperitoneal administration of sodium sulfate, labeled with S35, has been reported by Singher and Marinelli (1). Of particular interest is their observation that the highest concentration of the radioactive sulfur was found in the bone marrow. This observation stimulated us to determine the change with time in the concen...