Inulin is a labile polyfructose polymer found in many sources as chicory, artichoke and dahlia roots. It ́s derived FOS (Fructo-OligoSaccharides) are produced using endo-inulinases or alternatively with less expensive and safe catalysts such as phosphoric and citric acids with good yields. Inulin and FOS deserve an important role against some diseases as colon cancer because can be selectively f...

Examination of published procedures for the decomposition and subsequent analysis of chromite and chrome ores shows some to be unnecessarily complicated and time consuming. Others fail to yield consistent and reproducible results. Decomposition is rapidly and effectively accomplished using the peroxide frit technique of Rafter. Chromium may then be removed and determined volumetrically allowing...

Recently, dynamic approach has been applied to determine the steady state concentrations of multiple ionic species present in complex buffers at equilibrium. Here, we have used the dynamic approach to explicitly model the pH profiles of biologically relevant phosphate buffer and universal buffer (a mixture of three tri-protic acids such as citric acid, boric acid and phosphoric acid). The resul...

Novel hydrolysis stable 2-(ω-phosphonooxy-2-oxaalkyl)acrylate monomers 3 with phosphoric acid moieties were synthesized by a three step synthesis via Baylis-Hillman reaction of ethyl acrylate and formaldehyde, and subsequent etherification of the obtained product with diols and phosphorylation using POCl(3). The polymerization enthalpy of 2-(ω-phosphonooxy-2-oxaalkyl)acrylates 3 as measured by ...

The hydrogenation of 2-methylquinoline with Ir catalysts based on chiral phosphine-phosphites has been investigated. It has been observed that the reaction is very sensitive to the nature of the ligand. Optimization of the catalyst, allowed by the highly modular structure of these phosphine-phosphites, has improved the enantioselectivity of the reaction up to 73% ee. The influence of additives ...

Pine as a softwood and poplar hardwood pretreated with hydrochloric acid (HCl), phosphoric (H3PO4), hypophosphorous (H3PO2) are studied for the pyrolytic properties products in thermogravimetry (TG) fixed bed reactor. The pyrolysis performances pronouncedly distinguished due to compositional structural changes induced by pretreatments. Reduction mineral content biomass feedstocks pretreatment a...

introduction: one of the clinical problems in orthodontics is the bonding of brackets tocomposite restorations. the aim of this study was to evaluate the shear bondstrength of brackets bonded to composite restorations using excite. methods:forty brackets were bonded to composite surfaces, which were embedded inacrylic resin. one of the following four protocols was employed for surfacepreparatio...

Abstract The study was conducted to extract zinc and the results on extraction of Zn from sublime with solution sulfuric, thermal phosphoric acids are presented depending Solid: Liquid (S:L), concentration duration leaching process. Sulfuric acid used a content 8% which is waste product non-ferrous metallurgy, phosphorites Central Kyzylkum. It has been established that maximum degree noted when...

Boiled spinach extracts reversibly inhibit the transhydrogenase activity of ferredoxin-nicotinamide adenine dinucleotide phosphate reductase. The inhibition is competitive with respect to NAD but noncompetitive with respect to NADPH. The inhibitor is most effective at a pH of about 8.0. The inhibitor is characterized as an organic acid but does not appear to be a carbohydrate or phosphoric acid...

During the last few years it was observed that anhydrides of carboxylic and phosphoric acids appear as intermediates in metabolism. For one of these, acetyl phosphate, a method of determination had been worked out (I), based on a differential precipitation of calcium acetyl and inorganic phosphate with subsequent phosphate determination in the separate fractions. Such a procedure, founded on a ...