Single step pretreatment-saccharification of corn stover was investigated in aqueous p-toluenesulfonic and sulfuric acid media. Dilute aqueous solution of p-toluenesulfonic acid was a better catalyst than aqueous sulfuric acid of the same H(+) ion concentration for single step pretreatment-saccharification of corn stover at moderate temperatures and pressures. For example, 100mg corn stover hea...

in the present study, sulfuric acid was used for artemia cysts decapsulation. cysts of artemia franciscana were hatched out in regular manner or following hypochlorite or acid decapsulation. two acid concentrations (1 and 5%), three acid immersion times (10, 30 and 50 min) were used and hatching rates were recorded after 15, 18 and 24 h incubation. hatching rates increased but hatching time dec...

original paper   the mass-transfer media plays a significant role on the performance of a packed tower. in this paper three counter-current single-stage packed towers at laboratory scale, randomly packed with two different sizes of two types of packing material were experimentally tested to study the role of the packing on the performance of them in the removal of sulfuric acid mists. gas sampl...

Used fly ash as raw material, it was modified by acid, alkali and high temperature to produce adsorbent, sulfuric acid sodium hydroxide adsorbent adsorbent. In this paper, the effects of dosage, adsorption time, initial dye concentration, wastewater pH on were studied. The results showed that: had a good treatment effect dye; when dosage 1.00 g, time 90 min, 4, 45 °C, decolorization rate 60 mg/...

The aim of this study was to evaluate the effects of adding sulfuric acid to sugarcane topssilage on rumen bacteria and whole rumen microorganisms (WRM) and compare the digestibility of sugarcane tops treated with different amount of urea, molasses and sulfuric acid between Holstein cow and Khouzestan buffalo. Regardless of the type of the treatment, potential of gas production (B) by cow WRM (...

The reaction probabilities of NzO~ and C10N02 with HZO on liquid sulfuric acid surfaces have been reexamined to survey the effect of HNO~ on these two hydrolysis rates, using a fast flow reactor coupled to a chemical ionimtion mass spectrometer. The. measurements were cankd out by maintaining constant H20 and HNO~ partial pressures and by varying temperatures between 227 and 195 K in order to m...

in order to find the most effective method to overcome seed dormancy in teucrium chamaedrys  l. medicinal plant species the effect of some chemical and physical breaking methods including: cold stratification (5 °c), scarification with sandpaper, stratification with needle, concentrated sulfuric acid, gibberellic acid and combination of these methods were investigated. treated seeds along with ...

Abstract. The role of pyruvic acid (PA), one the most abundant α-keto carboxylic acids in atmosphere, was investigated both SO3 hydrolysis reaction to form sulfuric (SA) and SA-based aerosol particle formation using quantum chemical calculations a cluster dynamics model. We found that PA-catalyzed is thermodynamically driven transformation process, proceeding with negative Gibbs free-energy bar...