Hydrophilic matrices are of utmost interest for oral prolonged release drugs. However, they show decreasing rate over time, mainly due to lengthening the diffusional pathway across gel formed upon glass-rubber transition polymer. Therefore, achievement zero-order kinetics, which could reflect in constant drug plasma levels, is still an open issue. With aim improving performance hydroxypropyl me...

recently, a variety of soils contaminated with heavy metals e.g. cr (vi), have been found in industrial sites. such soil contamination is widely distributed in the world and has now become a serious issue for environment. hexavalent chromium, cr (vi), which is known to be carcinogenic and mutagenic to living organisms, has been utilized for leather tanning, electroplating and in other industrie...

Fractional diffusion equations are widely used to describe anomalous diffusion processes where the characteristic displacement scales as a power of time. For processes lacking such scaling the corresponding description may be given by distributed-order equations. In the present paper we consider different forms of distributed-order fractional kinetic equations and investigate the effects descri...

This study aims to investigate the anaerobic degradation kinetics of reactive dye, C.I. Reactive Red 141 (Evercion Red H-E7B) by partially granulated anaerobic mixed culture using three carbon sources, namely modified starch (MS), polyvinyl alcohol (PVA) and acrylic size (AS) during batch incubation. There is a first-order kinetics reaction in the decolorization processes using MS and PVA as ca...

A 30-month-old, 13-kg child reportedly ingested up to 16 ounces of a wine containing 20% ethanol. The child was brought into the emergency department by paramedics, and upon arrival was found to be comatose and unresponsive to deep stimuli but breathing spontaneously. The patient remained unconscious and unresponsive for three hours after admission. Despite an initial blood ethanol level of 98....

Reports on the kinetics of the autoxidation of aqueous nitric oxide are discussed. It is concluded that the correct rate law is -d[NO]/dt = 4kaq[NO]2[O2] with kaq = 2 x 10(6) M-2.s-1 at 25 degrees c and that a recent report of a rate law zero order in NO is incorrect.

Kinetics of oxidation of phenyl acetic acid and DLMandelic acid by potassium permanganate in aqueous acetic acid and perchloric acid mixture reveals that the kinetic orders are first order in oxidant, first order in H+ and zero order in substrate for phenyl acetic acid. DL-Mandelic acid exhibits first order in oxidant and zero order in substrate. The results are rationalised by a mechanism invo...

D-Galactose, Nessler's Reagent The present paper deals with the kinetics of oxidation of D-galactose by Nessler's reagent in alkaline medium. The reaction is zero order with respect to Hg(II) and first order with respect to reducing sugar. The direct proportionality of the reaction rate at low hydroxide ion concentrations shows retarding trend at higher concentrations. The reaction rate is inve...

Kinetics of ruthenium (III) catalysed oxidation of essential amino acid, arginine by hexacyanoferrate (III) has been carried out in aqueous alkaline medium at 35°C.The rate of the reaction shows first order dependence on hexacyanoferrate (III). The reaction rate is first order at low concentrations of amino acid and alkali both and tends towards zero order at higher concentrations of substrate ...