نتایج جستجو برای: acidic composition
تعداد نتایج: 292537 فیلتر نتایج به سال:
[1] Data from 24-hour bulk filter samples collected by the AIRMAP program were used to estimate aerosol acidity at a site in New England. The sampling site, Thompson Farm in Durham, New Hampshire, is situated 15 km inland from the Atlantic Ocean. The aerosol chemical composition in this area is dominated by sulfate (SO4 2 ) and ammonium (NH4 ) and aerosols that are weakly acidic, most likely be...
The relationship between dissolved oxygen (DO) and corrosion behavior of X80 steel in acidic soil simulated solution was studied by potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS), scanning Kelvin probe technique (SKP) and X-ray diffraction (XRD). Results showed that the presence of DO accelerated the cathodic process of corrosion for X80 steel in the acidic so...
The rhizosphere of grown tea (Camellia sinensis (L.) O. Kuntze) becomes acidic, and aluminium (Al) toxicity has been identified as a key constraint on plant development in acidic soils. current study investigated the composition functions bacteria well soil enzyme activity under different Al stress conditions. effect pH, activities, diversity structure bacterial population various concentration...
In the southeast of Nir, south of Yazd Povince, several acidic volcanoes rocks are exposed and form the youngest volcanic rocks in this region with dacite-rhyodacite composition. These rocks are composed of plagioclase, hornblende, biotite and quartz phenocrysts with trachytic and hyallomicrolithic porphyry texture. Based on geochemical data, the magmatic affinity of these rocks is calc-alkali...
Zircon is an stable mineral during post crystallization processes and preserves characters of magmatic events. Zircon morphology can give some information about temperature, nature, and source of the magma. Study of the zircon morphology of Cretaceous granitoids and acidic volcanics from the southeast Saqqez area reveals that most of the crystals are P5 and S25 types with high alkalinity (I.A.)...
To mitigate the spread of a viral disease, it is crucial to understand factors that influence airborne virus transmission. However, micro-environment which exposed in expiratory aerosol particles highly complex. The relative humidity, particle size and composition, air composition affect infectivity by modulating salt organic concentrations within particle, as well phase state. A parameter has ...
Abstract. Thanks to its insolubility, mineral dust is considered a stable proxy in polar ice cores. With this study we show that the Talos Dome core (TALDICE, Ross Sea sector of East Antarctica) displays evident and progressive signs post-depositional processes affecting record below 1000 m deep. We apply suite established cutting-edge techniques investigate properties TALDICE, ranging from con...
Nanoparticles of perovskite-type LaCo0.5Fe0.5O3 (LCFO) were fabricated by sol–gel method.Thermal decomposition process of the complex precursor was examined by means of differentialthermal analysis–thermal gravimetric analysis (DTA/TGA). X-ray diffraction (XRD) resultsshowed that single perovskite phase has been completely formed after calcination at 750 °C. Inaddition, the surface morphology a...
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