a simple analytical system suitable for nephelometric measurements is introduced in this article. the electronic and optical components are simplified so that the apparatus is easily assembled from materials that are generally available. this instrument is designed for the efficient measurement of anions, and microgram quantities of ions may be determined by a convenient method of titration. us...

a novel podand based anion receptor bearing benzimidazole motifs as recognition sites was designed and synthesized by reaction of 1,7-bis(2'-methylbenzoate)-1,4,7-trioxaheptane and phenylenediamine. the binding properties of anionic guest with this receptor were studied using uv-vis and fluorescence spectroscopy. these studies revealed that this receptor exhibit selective recognition towards f- ...

Pulmonary fibrosis is the major toxic effect of bleomycin chemotherapy; however, the molecular mechanisms of the pathological process are unknown. Since alveolar macrophages produce toxic oxygen metabolites and these can damage lung cells, the effect of bleomycin on superoxide anion production was investigated in subpopulations of pig alveolar macrophages. Cells were lavaged from the lung and s...

Most commercial water contains alkaline earth metal cations such as magnesium, calcium and barium, and anions such as carbonate, bicarbonate, sulfate, silicate, oxalate, phosphate, etc. Different combinations of these anions and cations will give rise to potentially scalant systems, such as calcium carbonate, calcium silicate, calcium sulfate, calcium oxalate, barium sulfate, magnesium sulfate,...

The current study aims to assess the water quality of Al-Diwaniyah River in city drink terms chemical properties and heavy metals their impact on health local population. results showed that most parameters river are low concentrations due limited human activities polluting water. concluded is suitable for drinking depending major cations anions all seasons. Heavy Metal Pollution Index (HPI) wa...

Density functional theory (DFT) computations of the electronic structures of undoped, B- and N-doped CNT(3,3), CNT(5,5) carbon nanotubes, and graphene with adsorbed chromate anions CrO42- were performed within molecular cluster approach. Relaxed geometries, binding energies, charge differences of the adsorbed CrO42- anions, and electronic wave function contour plots were calculated using B3LYP ...

The variation in the major groundwater chemistry can be controlled by dissolution and precipitation of minerals, oxidation-reduction reactions, sorption exchange transformation organic matter, but it also occur as a result anthropogenic influence. alluvial aquifer represents main source potable water for public supply town Varaždin surrounding settlements. Sampling campaigns were carried out fr...

In the dinuclear title complex, [Cu(2)(C(30)H(38)N(4)O(2))(H(2)O)(2)](ClO(4))(2), the coordination cation has crystallographically imposed twofold rotational symmetry. The Cu(II) ion is five-coordinated by two N and two O atoms from the macrocylic ligand and one O atom from a water mol-ecule, forming a square-pyramidal N(2)O(3) geometry with the water mol-ecule in the apical position. The dista...