The present investigation involves the evaluation of the effect of reducing dianions (SO32−, S2O32−, S2O52−) on the kinetics of simultaneous photoaddition, photoreduction and chemical reduction reactions of riboflavin (RF) at pH 6–8. The photoproducts of these reactions have been identified and...

In nature, microbiologically influenced corrosion (MIC) is often caused by multi-species biofilms rather than single-species biofilms. In this work, the MIC of 316L stainless steel (SS) was investigated in the presence of individual and mixed consortium biofilms of Shewanella oneidensis and Baci...

A study of the effect of some divalent anions (carbonate, oxalate, phthalate, phosphate) on the kinetics of photodegradation reactions of riboflavin (RF) and its pathways, product composition and fluorescence quenching in the pH range 6.0–8.0 has been conducted. The photodegradation of RF in th...

Thiol Protease inhibitors (cystatins) are endogenous natural inhibitors of cysteine proteases. They are present in all mammalians cells and body fluids. Cystatin are allocated into three major families. Family –I stefins, family –II cystatins and family –III kininogens, according to their ami...

Roxarsone (ROX) is a typical organoarsenic feed additive, and most of ROX is excreted unchanged in manure and wastewater. The stability and mobility of ROX result in the environmental risk of arsenic contamination spreading. The degradation of ROX to arsenate (As(V)) can reduce the mobility and ...

In this work, lemon and onion biomasses commonly found in street markets are for the first time used to develop a facile, fast and low-cost one-step microwave-assisted carbonization method for synthesis of highly fluorescent carbon dots (CDs). The structure and optical properties of CDs were inv...

This study aimed to investigate the riboflavin, niacin, folate and B12 content in microalgae powders. Riboflavin was determined with an ultra-high-performance liquid chromatographic (UHPLC) method after extraction and a two-enzyme treatment. Niacin analysis involved mild acidic hydrolysis, with ...

Strigolactones (SLs) are carotenoid-derived plant hormones that influence various aspects of plant growth and development in response to environmental conditions, especially nutrients deficiency. SLs are synthesized via a strict stereo-specific core pathway that leads to the intermediate carlact...

The assays of several phase I and phase II xenobiotic-metabolizing enzyme activities, as well as CYP1A immunoblot analysis, were performed in liver microsomes and cytosol of male C57BL/6 mice (Ah receptor-responsive), of male DBA/2 mice (Ah receptor-low responsive) and of female Ah receptor gene...

Reticulataxanthin and citranaxanthin were found to be artifacts formed from β-citraurin and β-apo-8′-carotenal during the saponification of citrus carotenoids in the presence of small amounts of acetone. The reaction takes place at room temperature under normal conditions of extraction. Based...

The Raman spectra of all-trans-β-apo-8′-carotenal in the S1 and T1 states have been recorded by a technique using 355 nm pump and 532 nm probe, mode-locked (76 MHz), Q-switched (800 Hz) pulse trains (pulse duration ≈100 ps). The technique takes advantage of the difference in the S1 and T1 lif...

Eleven cis-trans isomers of okenone were isolated by means of HPLC using a silica-gel column from an isomeric mixture which was obtained by iodine-sensitized photo-isomerization of the all-trans isomer. The configurations of eight isomers among them were determined by NMR spectroscopy using the ...

In the self-initiated oxidation of β-carotene with molecular oxygen the rate of oxygen uptake was shown to depend on the oxygen partial pressure. Epoxides, dihydrofurans, carbonyl compounds, carbon dioxide, oligomeric material, traces of alcohols, and probably carboxylic acids were formed. The ...

The fluorescence spectrum of a linear carotenoid, all-trans-β-apo-8′-carotenal (β-apo-8′-carotenal) at 20°C is reported for the first time. This pigment contains a keto carbonyl group and thus is regarded as a model compound of fucoxanthin, a main light-harvesting carotenoid in marine algae...

The gas solubility of thermally rearranged polybenzoxazole (TR-PBO) membranes and precursor polymer membranes was determined for five representative small gas molecules, H2, N2, O2, CH4, and CO2, at 35 °C and pressures up to 23 atm. Precursor membranes that thermally rearranged to TR-PBO were p...

A series of polyimides including a non-coplanar moiety were synthesized in order to investigate the effect on gas permeability and selectivity. The gas permeation properties of He, H2, O2, N2, CH4 and CO2 were measured using a constant-volume method. Only 6FDA-terphenyl consisting of laterally a...

Two novel coordination polymers, [Zn4(hfpd)2(phen)4(H2O)4]n (1), {[Cd2(hfpd)(bpy)(H2O)]·H2O}n (2) (phen = 1,10-phenanthroline, bpy = 4,4′-bipyridine, H4hfpd = 4,4′-(hexafluoroisopropylidene) diphthalic acid), were synthesized and characterized by elemental analyses, FT-IR spectra, single-crys...

Sulfated polysaccharides from Crassostrea gigas (SCGP) were successfully prepared using chlorosulfonic acid–pyridine method. The structure of SCGP was determined by high performance liquid chromatography (HPLC), Fourier transform infrared spectrometry (FT-IR) and nuclear magnetic resonance (NMR...

Previous studies showed that chronic treatment with corticosterone facilitates elevated T-maze (ETM) inhibitory avoidance and a step-down avoidance task, responses that have been used to investigate aversive conditioning and memory processes. On the other hand, chronic corticosterone does not al...

Global fructose consumption is on the rise; however, maternal high-fructose intake may have adverse effects on offspring. We previously demonstrated that excessive fructose intake by rat dams altered steroidogenic gene transcription in the hippocampus of offspring. Herein, we examined how matern...