The inhibition effect of provitamin B5 on pitting corrosion of mild steel in circulating cooling water containing aggressive anions was investigated by potentiodynamic anodic polarization, chronoamperometric and scan electron microscope (SEM) analysis. The results show that provitamin B5 has a s...

Yellow maize contains high levels of β-carotene (βC), making it an important crop for combating vitamin A deficiency through biofortification. In this study, nine maize inbred lines were selected at random from 31 provitamin A (PVA) maize inbred lines and crossed in a partial diallel mating de...

Changes in concentrations and retention of provitamin A carotenoids during ripening of eight non-indigenous banana (Musa spp.) cultivars on trial for possible adoption in eastern Africa were established through high performance liquid chromatography analysis. Predominant provitamin A carotenoids...

The provitamin A potential of landrace orange maize from different locations (A, B, C and D) of central Malawi has been evaluated. Physicochemical compositions, color, total carotenoid content (TCC), carotenoid profiles, and oxygen radical absorbance capacity (ORAC) and 2,2-diphenyl-1-picryhydra...

Vitamins are essential for human health and are mainly obtained from dietary sources. Cantaloupe and honeydew melons are abundant in provitamin A and vitamin C. California is one of the leading producers of cantaloupe and honeydew melons in the United States. Because melon is a warm-season crop,...

Provitamin A cassava clones were analysed for starch yield and critical starch quality attributes, to understand possible applications in the food industry. Total carotenoids content in the test clones ranged from 0.03-11.94 μg g-1 of fresh root. Starch yield ranged from 8.4-33.2 % and correlat...

The article summarizes the results of our research on branched network of Provitamin D photo-isomerization in various media using UV absorption spectroscopy. The focus is on the microenvironment effect on the efficiency of Previtamin D cis-trans photoisomerization. Solvent polarity has a negligi...

Bananas are important staples in tropical and sub-tropical regions and their potential as a source of provitamin A has recently attracted attention for biofortification. A collection of 189 banana genotypes (AAB-plantains, M. acuminata cultivars and bred hybrids) was screened to determine variab...

Aryloxyphenoxypropionate (AOPP) herbicides with a chiral center are widely used to selectively remove annual and perennial grasses. However, the study of the enzymes involved in enantioselective degradation of AOPP herbicides is limited. A novel family VIII carboxylesterase gene, estwx, hydrolyz...

A characteristic, strong CD absorption appeared at 312 nm, when a 5-thio-2-nitrobenzoate (TNB) group was anchored at Cys93-S(βF9) of bovine hemoglobin (Hb) through-SS-linkage. The Hill coefficient, n = 2.7 of the TNB-modified Hb was practically identical with that of native Hb, demonstrating th...

Strains PB4 (Burkholderia cepacia) and SB4 (Ralstonia paucula) were isolated on 4-aminobenzoate and found to also grow on 4-nitrobenzoate. Nevertheless, and although reduction of a nitro group into an amino group is a thermodynamically favorable reaction, the main 4-nitrobenzoate degradation pat...

Gaseous bromomethyldimethylchlorosilane and 2-bromo-1-chloro-2-methylpropane have been studied by electron diffraction at room temperature. Both molecules exist as mixtures of gauche and anti forms. For bromomethyldimethylchlorosilane, the mole fraction values are 0.55(9) gauche, and 0.45(9) ant...

A new electrochemical procedure for the electrocatalytic carboxylation of 2-amino-5-bromopyridine with CO2 in ionic liquid, 1-butyl-3-methyllimidazolium tetrafluoborate (BMIMBF4), to 6-aminonicotinic acid was investigated for the first time. The experiments were carried out in three electrodes u...

EGFR has a key role in cell growth. Its mutation and overexpression share in epithelial malignancies and tumor growth. Quinazoline and quinoline derivatives are common anticancer intracellular inhibitors of EGFR kinase, and their optimization is an important issue for development of potent targe...

The formation of biodegradable polymer networks by the crosslinking of tailor-made poly(ε-caprolactone) (PCL) via the ultrafast 1,2,4-triazoline-3,5-dione (TAD) chemistry has been demonstrated. First, a series of α,ω-oleyl terminated PCL was prepared by a two-step, one-pot synthesis that was ...

Thermal and photochemical homopolymerization of methyl methacrylate (MMA) and copolymerization of MMA and styrene (S) initiated by cholesteryl oleyl carbonate (CHOC) and cholesteryl 2-ethylhexyl carbonate (CHEHC) were studied in the presence of tetraphenylporphyrin (TPP) and cobalt-tetraphenylpo...

Synthesis of multilayered composite polymer particles comprising mainly poly(iso-butyl methacrylate)-block-polystyrene (PiBMA-b-PS) has been carried out by the use of two-step activator generated by electron transfer for atom transfer radical polymerization (AGET ATRP) in aqueous microsuspension...

The emulsion atom transfer radical polymerization (ATRP) of 2-ethylhexyl methacrylate (EHMA) was carried out with ethyl 2-bromoisobutyrate (EBiB) as an initiator and copper bromide (CuBr)/4,4′-dinonyl-2,2′-bipyridyl (dNbpy) as a catalyst system. The effects of surfactant type and concentration...

Thick films of nanocomposites made of poly(methyl methacrylate) matrix and colloidal anatase TiO2 nanorods fillers were prepared by solvent mixing and solution drop casting. Different concentrations of nanorods were tested in order to examine the influence of the nanoscale fillers on the composi...

Surface free energy and surface reorganization, two essential properties for low surface free energy materials, have been researched by studying the effects of the groups (H or CH3) at α-position and the side-chain structures (flexible or rigid) of alkyl (meth)acrylate on a series of fluorinate...