Investigation on the interaction of prulifloxacin with human serum albumin: a spectroscopic analysis.

The interaction between prulifloxacin (PUFX) and human serum albumin (HSA) was investigated under simulated physiologic conditions with fluorescence spectra. The fluorescence quenching process of HSA may be mainly governed by a static quenching mechanism. The apparent binding constant K(b) between PUFX and HSA at different temperatures were 2.

Investigation on interaction of prulifloxacin with pepsin: a spectroscopic analysis.

The interaction between prulifloxacin, a kind of new oral taking antibiotic and pepsin, a kind of enzyme in the stomach has been investigated in vitro under a simulated physiological condition by different spectroscopic methods. The intrinsic fluorescence of pepsin was strongly quenched by prulifloxacin. This effect was rationalized in terms of a static quenching procedure.

Study on the photocatalytic activity of p-n junction photocatalyst Cu2O/TiO2.

p-n junction photocatalyst Cu2O/TiO2 was prepared by ball milling through doping Cu2O into TiO2 and using H2O solution as disperser. The p-n junction photocatalyst Cu2O/TiO2 was characterized by UV-Vis diffuse reflection spectrum, Scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of the photocatalyst was evaluated by photocatalytic reduction of Cr2O7(2-) and photocatalytic oxidation of methyl orange (MO), respectively.

Preparation, characterization and activity evaluation of p-n junction photocatalyst p-CaFe2O4/n-Ag3VO4 under visible light irradiation.

p-n junction photocatalyst p-CaFe(2)O(4)/n-Ag(3)VO(4) was prepared by ball milling Ag(3)VO(4) in H(2)O doped with p-type CaFe(2)O(4). The structural and optical properties of the photocatalyst were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and UV-vis diffuse reflection spectrum (DRS). The photocatalytic activity was evaluated by photocatalytic degradation of methylene blue (MB) under visible light irradiation.

Titanium dioxide mediated photocatalytic degradation of methamidophos in aqueous phase.

In this paper, the photocatalytic degradation of methamidophos, an organophosphorous pesticide, was investigated in aqueous solution by using TiO(2) as a photocatalyst. The degradation was studied under different conditions such as the amount of the photocatalyst, illumination time, pH of the system, reaction temperature, initial concentration, electron acceptors, metal ions and presence of anions. The results showed that the photocatalytic degradation of methamidophos was strongly influenced by these parameters.

Preparation and activity evaluation of p-n junction photocatalyst NiO/TiO2.

p-n Junction photocatalyst NiO/TiO2 was prepared by sol-gel method using Ni(NO3)2.6H2O and tetrabutyl titanate [Ti(OC4H9)4] as the raw materials. The p-n junction photocatalyst NiO/TiO2 was characterized by UV-vis diffuse reflection spectrum, X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS).

[Effects of silicon on photosynthesis and antioxidative enzymes of maize under drought stress].

With pot experiment, this paper studied the effects of silicon supply on drought-resistance capability of maize plant. The results showed that under mild and severe drought stress, supplying silicon could increase the plant biomass by 31.1%-33.

Study on the photocatalytic degradation of glyphosate by TiO(2) photocatalyst.

In this paper, the photocatalytic degradation of glyphosate selected as the deputy of organic pollutant in aqueous solution with TiO(2) powder as a photocatalyst has been studied. The effects of various parameters, such as the amount of the photocatalyst, illumination time, initial pH value, electron acceptors, metal ions, and anions on the photocatalytic degradation of glyphosate were investigated. From the studies, the best condition for the effect of the parameters on the photocatalytic degradation of glyphosate was obtained.

[Application of L-cysteine-capped nano-ZnS as a fluorescence probe to the determination of proteins in human serum].

Nanometer-sized L-cysteine-capped ZnS particles as a fluorescence probe were synthesized, and the effect of proteins on the fluorescence intensity has been investigated. With deltalambda = 190 nm, the maximum and constant synchronous fluorescence enhancement was produced at 268.0 nm and pH 5.

[Water regulation characteristics and stress resistance of Caragana opulens population in different habitats of Inner Mongolia plateau].

This paper studied the water regulation characteristics and stress resistance of Caragana opulens population in Helinger (semi-arid area) and Alashan (intensively arid area), aimed to understand the adaptation mechanisms of this population to arid environment. The results showed that compared with Helinger population, Alashan population had a higher content of osmotic adjustment substances in leaf cells, which resulted in a lower osmotic potential, and thus, stronger osmotic adjustment ability. The leaf water and free water contents of Alashan population were lower than those of Helinger population, while the bound water content and the ratio of bound water to free water of the former were higher than those of the latter.

Study on the photocatalytic reduction of dichromate and photocatalytic oxidation of dichlorvos.

In this paper, dichromate and dichlorvos are selected as the deputies of inorganic and organic pollutants, respectively, and TiO2/beads is used as a photocatalyst. The effects of various parameters, such as the amount of the photocatalyst, H2O2 concentration, metal ions, anions, pH value, and organic compounds on the photocatalytic reduction of dichromate and photocatalytic oxidation of dichlorvos are studied. From the studies, the differences of the parameters effect on the photocatalytic degradation of organic and inorganic pollutants are obtained.

[Extraction catalytic spectrophotometric determination of trace chromium by synergetic catalytic effect].

In this paper, a new synergetic extraction catalytic spectrophotometric method for the determination of trace chromium was studied. The method is based on the iron(III) and chromium(VI) synergetic catalyzed oxidation of o-aminophenol by hydrogen peroxide in weak acidic medium at pH 5.5.

[Catalytic kinetic spectrophotometric determination of trace ascorbic acid].

In this paper, a new catalytic kinetic spectrophotometric method for the determination of trace amounts of ascorbic acid has been studied. The method is based on the activation effect of ascorbic acid on vanadium (V) catalyzed oxidation of deoxidized rhodamine B by potassium bromate in weak acidic medium at pH 4.5.

[Effects of soil available silicon on growth, development and physiological functions of soybean].

Soybean plants were planted in pots to investigate the effects of soil available silicon on their growth, development and physiological functions. When the content of soil available silicon was 55.1-202.

[Determination of activator aluminum by catalytic kinetic spectrophotometry].

In this paper, a new catalytic kinetic spectrophotometric method for the determination of activator aluminum was studied. The method was based on the activation effect of aluminum (III) on the copper (II) which catalyzes the oxidation of pyrocatechol by hydrogen peroxide in acetic acid-sodium acetate buffer solution at pH 5.0.

[Determination of trace molybdenum by extraction catalytic kinetic spectrophotometry].

A new extraction catalytic kinetic spectrophotometric method for the determination of trace molybdenum is studied. The method is based on the molybdenum (VI) catalytic oxidation of o-aminophenol by hydrogen peroxide in week acidic medium at pH 5.5.

[Catalytic fluorimetric determination of trace oxalate].

A new catalytic fluorimetric method for the determination of trace oxalate has been developed. The method is based on the catalytic effect of oxalate on the oxidation of potassium dichromate with rhodamine B in sulfuric acid medium. The catalytic reaction takes place at 50 degrees C for 10 min in a water bath and is a pseudo-zero-order reaction.

[Study on the reaction mechanism of the system of Tl(III)-Cu(II)-EDTA-H2O2-DPC].

In this paper, the reaction mechanism of the system of thallium (III)-copper(II)-ethylenediaminete-traacetate-hydrogen peroxide-diphenylcarbazide has been studied by spectrophotometric method. The experimental results show that the reaction mechanism of the system is based on the replacement of copper(II) by thallium (III) in copper-ethylenediamine-tetraacetate complex and the copper(II) catalyzed oxidation of diphenylcarbazide by hydrogen peroxide to form diphenylcarbazone and the color reaction of copper(II) with diphenylcarbazone in weak acidic medium at pH 5.5.

[Simultaneous determination of iron and molybdenum by extraction catalytic spectrophotometry].

In this paper, a new extraction catalytic spectrophotometric method for the simultaneous determination of iron and molybdenum has been studied. The method is based on the difference of the reaction rate of iron(III) and molybdenum(VI) catalyzed oxidation of o-aminophenol by hydrogen peroxide in weak acidic medium at pH 5.5.