in this study, the potential of biosorbent obtained from silk maze, was investigated for the batch biosorption of direct red 81 (dr 81) in aqueous solution. the effects of temperature, biosorbent amount, contact time, initial dye concentration and ultrasonic irradiation were also evaluated. furthermore, experimental equilibrium and kinetics data were fitted by langmuir and freundlich isotherms ...

Abstract We investigated the stable isotope fractionation of chromium (Cr) for a panorama chondrites, including EH and EL enstatite chondrites their chondrules different phases (by acid leaching). observed that have heterogeneous δ 53 Cr values (per mil deviation Cr/ 52 from NIST SRM 979 standard), which we suggest reflect physical conditions in chondrite accretion regions. Chondrules primitive...

Abstract The presence of highly siderophile elements in Earth’s mantle indicates that a small percentage mass was delivered after the last giant impact stage “late accretion.” There is ongoing debate about nature late-accreted material and sizes bodies. Earth appears isotopically most similar to enstatite chondrites achondrites. It has been suggested late accretion must have dominated by enstat...

Midand far-infrared spectra gained by the Short Wavelength Spectrometer (SWS) of the Infrared Space Observatory (ISO) satellite have provided striking evidence for the presence of crystalline silicates in comets, circumstellar envelopes around young stars and, most of all, evolved stars and planetary nebulae. Since optical properties of astrophysically relevant crystalline silicates are lacking...

Pseudo-BL algebras and pseudo-effect algebras arose in two rather different fields: fuzzy logics and quantum logics. In this paper, by introducing the notion of pseudo-weak MV-effect algebra which is non-commutative generalization of weak MV-effect algebra, we investigate the mutual relationship between pseudo-BL algebras and pseudo-effect algebras. We prove that dual pseudo-BL algebra under ce...