The inhibition effect of calcined lime (CaO) and limestone (CaCO3) on the formation dioxins during iron ore co-sintering with fly ash was investigated in a sinter pot present work. Experimental results indicated that international total toxicity equivalent concentration decreased from 1.4335 to 0.2922, 0.1048, 0.4562, 0.3098 ng I-TEQ Nm−3 under four different experimental conditions. It can be ...

In this work, a recoverable acrylamide-vinylamine copolymer immobilized TEMPO [P(AM-co-VAm)-T] catalyst for selective oxidation of cellulose with good catalytic performance and low degradation was developed. Firstly, the [P(AM-co-VAm)] prepared by Hofmann polyacrylamide (PAM). Then, condensation reduction reaction between amine groups P(AM-co-VAm) carbonyl 4-oxo-TEMPO yielded P(AM-co-VAm)-T. P(...

Millimeter continuum and spectral line observations with 10", 30", and 60" resolution are used to characterize the structure and chemistry of the gas around the young, embedded star, IRAS 05338-0624. On arcminute scales, emission from dense gas tracers outline an isolated condensation centered on the IRAS source position. The condensation is characterized by a size of ~60", a density of 2 x 105...

Four Schiff bases (H2L1 to H2L4) were synthesized by the condensation of o-aminophenol and unsaturated diketones (1,5-diarylpent-4-ene-1,3- -diones). Analytical, IR, 1H-NMR mass spectral data revealed their existence in imine?enamine form. Dibasic tetradentate coordination ML complexes (M = Cu(II), Ni(II), Co(II), Zn(II), Cd(II), Hg(II)) was established based on physical, analytical data. The f...

Facile and versatile procedures have been explored for the synthesis of tetrahydropyridines and 2,3-dihydroquinazolin-4(1H)-ones. These protocols employ the one-pot multi-component condensation of arylaldehydes and aromatic amines with β-keto esters and isatoic anhydride in chloroacetic acid, respectively. The reactions proceeded smoothly to generate the corresponding products in high yield. We...

Facile and versatile procedures have been explored for the synthesis of tetrahydropyridines and 2,3-dihydroquinazolin-4(1H)-ones. These protocols employ the one-pot multi-component condensation of arylaldehydes and aromatic amines with β-keto esters and isatoic anhydride in chloroacetic acid, respectively. The reactions proceeded smoothly to generate the corresponding products in high yield. We...

in this paper, we present some inequalities for the co-pi index involving the some topological indices, the number of vertices and edges, and the maximum degree. after that, we give a result for trees. in addition, we give some inequalities for the largest eigenvalue of the co-pi matrix of g.

Graphitic carbon nitride (g-C3N4), as the one of most promising photocatalysts, usually relies on noble metal co-catalysts in photocatalytic water splitting H2 evolution process, which greatly increases use cost. Here, a zeolite imidazole framework (ZIF-67) derived [email protected]/g-C3N4 composite was constructed through facile thermal condensation ZIF-67 and melamine. The obtained composites...

in this paper, we introduce the notion of primal strong co-ideals and give some results involving them. it is shown thatsubtractive strong co-ideals are intersection of all primal strong co-ideals that contain them. also we prove that the representation of strong co-ideals as reduced intersections of primal strong co-ideals is unique.