نتایج جستجو برای: water mixture
تعداد نتایج: 632936 فیلتر نتایج به سال:
In an environmental setup both humans and animals are exposed to mixture of heavy metals, especially through drinking water. Little is known about the interactions among various heavy metals during their co-exposure through drinking water and their net combined toxic implications in humans and animals. In current study, we examined the effect of sub chronic exposure via drinking water to a low ...
in order to prevent water losses through disposing hydrous sludge during treatment of water, also recovery and reuse of chemicals; treatment by magnesium carbonate as a coagulant was examined in batch and continuous systems. 600 mg/1 mgco3 as optimum dosage reduced 80% turbidity of a highly turbid water containing 200 ntu. sulfates decreased, but hardness and alkalinity showed some increases. r...
Objective: The purpose of this study was a comparison between effectiveness of a new herbal bleaching material with combination of sodium perborate and distilled water. Materials and Methods: In this study, 27 permanent anterior teeth with intact crowns were selected and discolored intentionally by inserting them in whole blowhole centrifuged at 2500 rpm for 30 minutes three times a day for ...
A new polymorph crystalline silica composition having uniform pore dimensions were synthesized by calcining a crystalline hydrated alkyl-ammonium silicate. The pore dimensions approximately were 6 angstrom for silicalite-1 and 11 angstrom for silicalite-2 units. The silicalite-1 was prepared hydrothermally at a pH of about 10 from a reaction mixture consist of water, amorphous silica and a ...
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