The effects of applying a constant electric field E to an iodate-arsenous-acid reaction of mixed order are considered, where the reacting species, A and B, are present. The resulting equations are studied in detail by obtaining conditions for the existence and nonexistence of travelling waves. B...

The vibrational study of polycrystalline potassium, rubidium and cesium dihydrogenarsenates, KH2AsO4 RbH2AsO4 and CsH2AsO4, has been undertaken in the 20–4000 cm−1 range. The inelastic neutron scattering spectra obtained at 20 K allow a precise assignment of the OH vibrations. The infrared abso...

Publisher SummaryIt is impossible to consider in a short article each of the publications relevant to this field, which has appeared in the scientific and patent literature, they already far exceed a thousand in number. In the following pages, only the basic outline of the development of this br...

The present work is focusing on removal of arsenate from aqueous solution using FePO4. The equilibrium study regarding the removal of arsenic by FePO4 was carried out at 298, 308, 318 and 328 K. Langmuir parameters were found to increase with the increase in temperature indicating that the adsor...

In continuation to our earlier work on nickel (Ni)-arsenate (As) composite, the current work deals with the electrical conductivity and mechanical resistivity of the same composite by means of its further reinforcement with the polylactic acid (PLA) polymer. For the PLA-Ni-As composite, we under...

Facile fabrication of magnetic metal-organic frameworks (MOFs) using a direct epitaxial approach for eliminating arsenic from water is highly desirable. Herein, a two-step solvothermal method of elegant design is proposed to synthesize Fe3O4@UiO-66. Such resulting composite was systematically ch...

The potassium chromium (III) arsenate K3Cr3(AsO4)4 is prepared by solid state reaction at 900°C from a mixture of K2CO3, As2O3 and (NH4)2Cr2O7. It is structurally characterized by single-crystal X-ray diffraction. It crystallizes in the Cmca (no. 64) space group with a=10.671(1) Å, b=20.911(5) ...

N6-methyladenosine (m6A) modification is affected by oxidative stress and gets involved in arsenite toxicity. However, whether oxidative stress is one factor in arsenite-induced alteration of m6A levels remains unclear. Here, reactive oxygen species (ROS), product of lipid peroxidation (MDA), an...

A promising process, including selective arsenic extraction, oxidation and lime precipitation, was proposed to treat arsenate bearing secondary zinc oxide, which was a smelting dust generated from fuming furnace. With a mixed solution of 50 g/L NaOH and 50 g/L Na2S·9H2O at L/S ratio of 3:1, mor...

Migration of heavy metals into aquatic environments has become a concern in some regions of the world. Many wood preservatives are copper based systems that have the potential to migrate from the wood and into the surrounding environment. Some wood treaters have developed “best management pract...

In this work, zinc ferrite spinel with different zinc contents (ZnxFe3-xO4) was synthesized by a hydrothermal method and used for removing As(V) in aqueous solution. X-ray diffraction (XRD) results indicated that in the crystal structure of ZnxFe3-xO4, the zinc atoms tended to occupy the octahed...

Environmental contamination has been one of the major drawbacks of the industrial revolution. Several man-made chemicals are constantly released into the environment during the manufacturing process and by leaching from the industrial products. As a result, human and animal populations are expos...

In a recent study, it was reported that 4-methyl-2,4-bis(4-hydroxyphenyl)pent-1-ene (MBP), a metabolite of bisphenol A (BPA; 2,2-bis(4-hydroxyphenyl)propane), showed estrogenic activity in several in vitro assays, and the estrogenic activity of MBP was higher than that of BPA. In this study, we ...

4-Methyl-2,4-bis(4-hydroxyphenyl)pent-1-ene (MBP), an active metabolite of bisphenol A (BPA), has more potent estrogenic activity than BPA in vitro, but its activity in vivo is not established. Here, we examined in vivo estrogenic activity of MBP by means of uterotrophic assay in ovariectomized ...

The pyridinolysis of S-methyl chlorothioformate shows a biphasic Brønsted-type plot, in agreement with a stepwise mechanism and a change in the rate-limiting step, from formation of a zwitterionic tetrahedral intermediate (T±) at high pKa to its breakdown at low pKa. The reaction of the same su...

This study investigates the modification of bitumen separately with two novel additive materials: Organic-based Calcium Compound (OBCC) and Organic-based Boric Acid Compound (OBBAC). These compounds were synthesized chemically at laboratory conditions. 50/70 penetration grade bitumen was modifie...

The approach using synergistic effects of the blend of carboxylic collectors was applied to process the Tabuaco tungsten skarn ores (Portugal) by flotation. However, a very complex mineral composition with high amounts of the fluorite (>10%) and apatite (3–5%), as well as the presence of more t...

ObjectiveThe purpose of this study is to develop a quantitative structure–activity relationship (QSAR) model that can distinguish mutagenic from non-mutagenic species with α,β-unsaturated carbonyl moiety using two endpoints for this activity – Ames test and mammalian cell gene mutation test ...

The controlled polymerization of methacrylic monomers by nitroxide-mediated polymerization (NMP) still represents a challenge in polymer science. This issue can be circumvented by the addition of a small amount of a comonomer known to exhibit a controlled character in NMP, the most representativ...

The hybridization of titanium dioxide with periodic mesoporous silicas has been investigated so far to construct heterogeneous catalysts. In the present review article, the studies on the complexation of titanium dioxide with periodic mesoporous silicas are summarized from the viewpoints of the ...