نتایج جستجو برای: salt deposits
تعداد نتایج: 107902 فیلتر نتایج به سال:
Currently, fluid inclusions in halite have been frequently studied for the purpose of paleoclimate reconstruction. For example, to determine air temperature Middle Miocene (Badenian), we examine single-phase primary bottom halites (chevron and full-faceted) near-surface (cumulate) collected from salt-bearing deposits Carpathian region. Our analyses showed that temperatures near-bottom brines va...
In the oil industry, strontium sulfate (SrSO4) scale deposits have long plagued oilfield and gas production operations. This remains an unsolved problem. We here show how bubble column evaporator (BCE) can be used to control aqueous precipitation from salt solutions. Mixtures of nitrate sodium in BCE system were precipitate at different degrees supersaturation. The effectiveness was compared st...
When a pure water drop evaporates on soluble substrate, the final ring deposit takes form of an inclined wall for small and flat drops hollow rim other geometries. We report here experiments evaporation salty salt single crystals inert substrates, which permit to define precisely experimental conditions necessary obtain such structured deposits. Their growth is not consequence particular therma...
Zinc oxide (ZnO) is a semiconductor with various physicochemical properties allowing its use in wide range of technological applications. The aim this work to study nanocrystalline ZnO thin-film deposited using zinc salt which dissolved pure ionic liquids (ILs). latter play dual role: solvent and supporting electrolyte. Most ILs have large electrochemical window sufficient conductivity. In work...
Silicic tuffs infilling an ancient submarine caldera, at Mineral King in California, show microscopic fabrics indicative of welding of glass shards and pumice at temperatures >500 degrees C. The occurrence indicates that subaqueous explosive eruption and emplacement of pyroclastic materials can occur without substantial admixture of the ambient water, which would cause chilling. Intracaldera pr...
This study reports the prevalence of immune deposits associated with the proximal and distal tubules in a series of routine renal biopsies received in our department during a single calendar year. From 87 cases, 65 (74%) were found to have glomerular immune deposits by immunofluorescence. Tubular immune deposits were found in 12 cases (18%), 3 of which had no glomerular deposits. By transmissio...
Constituent fouling during thermal processing of milk is reviewed. Fouling occurs continuous-flow treatment, but the size and type deposit strongly depend on both conditions (e.g., temperature, time, flow conditions) product properties composition, pH). Heat-induced destabilisation proteins heat-induced precipitation calcium phosphate are main drivers for component processing. Whey included in ...
We present new observations of pyroclastic deposits on the surface of Mercury from data acquired during the orbital phase of the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) mission. The global analysis of pyroclastic deposits brings the total number of such identified features from 40 to 51. Some 90% of pyroclastic deposits are found within impact craters. The loca...
New Algerian Gram-positive, rod-shaped, endospore-forming, salt-philic bacteria (DZ28 strain) that overproduce extracellular alkaline proteases have been isolated from salt lake deposits in Lake Oubeira, El Taref. Strain DZ28 was assigned as Halobacillus salinus on the basis of phenotypic properties and 16S rDNA gene sequencing (ripotyping). The maximum protease activity registered after 36 hou...
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