A fiber optic sensor for monitoring mercuric (Hg2+) ions in the aqueous sample have been developed based on modified cladding. To fabricate a D-shaped sensing zone onto multimode optical lengthwise polishing was utilized using mechanical end and edge system. The produced region has dimensions of 10 mm × 125 μm 62 (l w h). 2 thin layer Al2O3 nanoparticles sensitized with 4-(2-pyridylazo)-resorci...

The present study developed a green metallochromic sensor that detects aluminium (Al(III)) ions in solution and solid state using anthocyanin extract from purple onion peels embedded bacterial cellulose nanofibers (BCNFs). CIE Lab colour parameters demonstrated Al(III) binding causes sensible change colour. A variety of metal including K+, Mn2+, Cu2+, Hg2+, Cr2+, Pb2+ Ni2+ were used to challeng...

the sorption behavior of loofa-immobilized phanerochaete chrysosporium mycelia in two forms, live (l) and heat-inactivated (hia), was studied for the removal of hg2+ ions from aqueous solution. using the langmuir isotherm, the two key parameters for the sorption performance, qm and the coefficient b, were obtained; the qm values for hg2+ ions were 72.46 mg/g and 92.59 mg/g and the b coefficient...

Detection and removal of metal ion contaminants have attracted great interest due to the health risks that they represent for humans wildlife. Among proposed compounds developed these purposes, thiourea derivatives been shown as quite efficient chelating agents cations heavy components high-selectivity sensors. Understanding nature metal–ionophore activity is thus high relevance. We present a t...

El presente trabajo tiene la finalidad de dar a conocer el desarrollo un prototipo sensor para medición mercurio (Hg2+) en solución acuosa sobre una plataforma electroquímica basada electrodos serigrafiados nanotubos carbonos (CNT-SPE) conjunto con nanopartículas oro (NPs-Au) realizadas través síntesis verde, utilizando extracto acuoso Sargassum spp. Para esto, se realizó caracterización las NP...

Linking two isomeric tridentate N-chelates together produces a hetero-ditopic ligand capable of selectively binding Hg2+ and Zn2+ ions in a double-stranded helicate.

Human fertility is a complex trait determined by gene-environment interactions in which genetic factors represent a significant component. To better understand inter-individual variability in fertility, we performed one of the first genome-wide association studies (GWAS) of common fertility phenotypes, lifetime number of pregnancies and number of children in a developing country population. The...

The expression of inducible NO synthase (iNOS) in pancreatic islet beta cells modulates endocrine cell functions and, at very high levels of NO production causes beta-cell death. We tested the hypothesis that environmental factors such as heavy-metal salts modulate iNOS expression in beta cells. A rat beta-cell line (insulinoma RINm5F) was cultured in the presence of low-dose interleukin (IL)-1...

Methods have been devised to examine the spectral properties and state of reduction of the pterin ring of molybdopterin (MPT) in milk xanthine oxidase and the Mo-containing domain of rat liver sulfite oxidase. The absorption spectrum of the native pterin was visualized by difference spectroscopy of each protein, denatured anaerobically in 6 M guanidine hydrochloride (GdnHCl), versus a sample co...

A new thiophene appended fluorescein-hydrazone derivative (FT) has been demonstrated as real-time sensory system for Hg2+ ions in aqueous medium. The detection limit of the probe FT towards was 137 nM. FT-Hg2+ complex found to be reversible presence EDTA. Significance lies its successful application and quantification real water samples logic gate fabrication future incorporation small organic ...