A specific soluble substance which occurs in tissues infected with the virus of lymphocy t i c choriomeningit is (1) was demons t ra ted in earlier work b y means of the complement-f ixat ion reaction. In the present communicat ion certain characteris t ics of the soluble substance are recorded and methods are described for prepar ing solutions of antigens wi th which a precipi t in reaction ca...

Abstract This chapter introduces a general protocol to transfer metal ions from aqueous solution to an organic medium, which involves mixing the aqueous solution of metal ions with an ethanolic solution of dodecylamine (DDA), and extracting the coordinating compounds formed between metal ions and DDA into toluene. This protocol could be applied toward transferring a wide variety of transition m...

Salt-affected soils are related to salinity (high content of soluble salts) and/or sodicity (excess sodium), which major leading causes agricultural land degradation. This study aimed evaluate the performances three machine learning (ML) algorithms in predicting soil exchangeable sodium percentage (ESP), electrical conductivity (ECe), and salt-affected classes, from salt ions. The assessed ML m...

The electroreduction of the pertechnetate ions has been examined in sulfuric acid solutions (0.5-4 M) using optically transparent thin layer spectroelectrochemical (RVC-OTTLE) cell. Soluble Tc(III), TcO2+ and [Tc(μ-O)2Tc]3+/4+ species with absorption bands at 420-450, 400, and 502 nm, respectively, were found to be formed during the reduction of TcO4- ions. The strongly acidic medium was found ...

belladona leaves as well as all other studied leaves contains two distinct phosphatase fractions belonging respectively to types ii and iiii the major parts of these enzymes is extraetible by water. it was not possible to extract the non soluble fraction which is solidly retained by the cellular constituents. phosphatase ii does not differ from other phosphatnses of the same type. whereas phosp...

Colloidal, organic solvent-soluble Ln3+-doped LaVO4 nanoparticles have been synthesized by a precipitation reaction in the presence of (C18H37O)2PS2- as ligand, that coordinates to the surface of the nanoparticles. The materials are well soluble in chlorinated solvent such as chloroform. Energy transfer of excited vanadate groups has been observed for Ln3+ ions that emit in the visible and the ...

The interactions between anionic polyelectrolytes [polyacrylic acid, poly(methyl vinyl etherco-maleic anhydrate)] and copper ions in aqueous solution (pH 7.0) were investigated by dynamic light scattering, UV-visible and fourier transform infrared spectroscopic techniques. Viscosity was also measured by ubbelohde automatic viscometer. Observations indicate that the ratio of ingredients, the nat...

Water-soluble hexagonal NaScF4:Yb/Er nanocrystals have been directly synthesized via a facile one-step hydrothermal route. The as-prepared nanocrystals were monodisperse and could form stable colloidal solutions in polar solvents, such as water and ethanol. The novel NaScF4:Yb/Er nanocrystals exhibited intrinsic intense red upconversion emission, in contrast to other lanthanide-doped fluoride n...

The use of plants to monitor heavy metal pollution in the terrestrial environment must be based on a cognizance of the complicated, integrated effects of pollutant source and soil-plant variables. To be detectable in plants, pollutant sources must significantly increase the plant available metal concentration in soil. The major factor governing metal availability to plants in soils is the solub...

Received for publication 8 December 1965. reduced copper is oxidized to cupric ions by means of iodine. If no necessary allowance has been made, the cupric ions formed would be completely reduced and precipitated as cuprous iodide in the presence of an excess of soluble iodide in the reagent. Probably to check this reduction by iodide, Harding and Downs (1933) employed potassium oxalate in thei...