all kind of acid
Sulfuric acid, sulfuric also spelled Sulphuric (H2SO4), also called Oil Of Vitriol, or Hydrogen Sulfate, dense, colourless, oily, corrosive liquid; one of the most important of all chemicals, prepared industrially by the reaction of water with sulfur trioxide (see sulfur oxide), which in turn is made by chemical combination of sulfur dioxide and oxygen either by the contact process or the chamber process.
Hydrochloric acid is important for digestion and absorption of many nutrients. When hydrochloric acid is lacking (a condition termed hypochlorhydria), malnutrition results. At the same time, one can develop multiple food sensitivities as abnormally large, inadequately digested food particles are absorbed, triggering an immune response. Also insufficiency is associated with greater incidence of dysbiosis .
nitric acid 1420
The extraction equilibrium of indium(III) from a nitric acid solution using di(2-ethylhexyl) phosphoric acid (D2EHPA) as an acidic extractant of organophosphorus compounds dissolved in kerosene was studied. By graphical and numerical analysis, the compositions of indium-D2EHPA complexes in organic phase and stoichiometry of the extraction reaction were examined.
nitric acid 1320
The Multiple Extraction Procedure (MEP) described in this method is designed
to simulate the leaching that a waste will undergo from repetitive precipitation
of acid rain on an improperly designed sanitary landfill. The repetitive
extractions reveal the highest concentration of each constituent that is likely
to leach in a natural environment. Method 1320 is applicable to liquid, solid,
and multiphase samples.
Composite materials prepared by loading polycrystalline TiO2 powders with lipophilic highly branched Cu(II)- and metal-free phthalocyanines or porphyrins, which have been used in the past as photocatalysts for photodegradative processes, have been successfully tested for the efficient photoreduction of carbon dioxide in aqueous suspension affording significant amounts of formic acid.
The effect of different sources of nitrogen as well as their concentrations on the bioconversion of carbon monoxide to metabolic products such as acetic acid and ethanol by Clostridium autoethanogenum was studied. In a first set of assays, under batch conditions, either NH4Cl, trypticase soy broth or yeast extract (YE) were used as sources of nitrogen.
In this study, we aimed to dissolve microcrystalline cellulose (MCC) with phosphoric acid to obtain high-quality fermentable saccharides. MCC was directly dissolved in phosphoric acid (the concentration was 83%) for 10 hours at temperatures of 30, 50, and 70 °C. The structural changes of MCC were determined in detail with X-ray powder diffraction, solid-state cross-polarization magic angle spinning 13C-NMR, and X-ray photoelectron spectroscopy.