Two highly active solid superacids of sulfated tin oxide were prepared, and their catalytic action was compared with that of sulfated zirconia. One was prepared from tin oxide gel, which was precipitated by the hydrolysis of SnCl4 and washed with aqueous ammonium acetate solution, followed by ex...

This work is aimed at elaborating a route for co-modification of acidic and catalytic sites on the surface of nanocrystalline tin oxide with the aim to enhance the sensitivity to ammonia gas. Sulfated tin oxide with controlled amount 0–10 wt.% of SO42− as the acidic modifier was synthesized by ...

A new polymeric–inorganic cation exchanger acrylonitrile stannic(IV) tungstate composite was synthesized by sol–gel technique by incorporating stannic(IV) tungstate precipitate with acrylonitrile. Composite materials formed by the combination of inorganic ion exchangers of multivalent metal ac...

Tin oxide nanomaterials prepared by hydrothermal synthesis at 100 °C or 140 °C with or without template and further calcination step were modified with sulfate groups by post synthesis treatment. The catalysts were characterized by X-ray powder diffraction (XRD), N2 physisorption, UV Vis spect...

The hydrated stannic oxide (HSO) was synthesized and arsenic adsorption behaviour is reported. HSO is found to be amorphous, and stable thermally up to 700 °C. The adsorption of As(III) is much higher than As(V) in the drinking water pH (6.5–8.5) range. The time required for reaching equilibri...

Chitosan, a potent amino polysaccharide, has been impregnated with Sn(IV) chloride for effective adsorption of fluoride from water. The Sn(IV) chloride impregnated chitosan was synthesized using microwave assisted technique. The material was thoroughly characterized using FTIR, SEM, EDX and XRD....

Sulfated stannia (SO4/SnO2) obtained by drying meta-stannic acids (supplied by Koujundo Kagaku and Yamanaka) at 200 °C, followed by exposing to 3 M H2SO4 and calcining at 300 °C showed catalytic activities higher than those of the materials obtained from conventional gels (preparation of stann...

ABSTRACTThe current study was carried out to assess 2 hypotheses: (1) cows differ in susceptibility to a subacute ruminal acidosis (SARA) challenge, and (2) the milk fatty acid (FA) pattern can be used to differentiate susceptible from nonsusceptible cows. For this, 2 consecutive experiments wer...

ABSTRACTWe sought to establish predictive response models of milk fatty acid (FA) yields or concentrations from their respective duodenal flow, rumen digestive parameters, or diet characteristics in dairy cows, with a special focus on cis and trans isomers of C18:1, C18:2, odd- and branched FA, ...

A facile seven-step synthesis of adamantane-2,6-dione is presented that involves minimal purification, provides multigram quantities of product, and proceeds in an overall yield of 21%. The mono-ketal of adamantane-2,6-dione is obtained in 18% overall yield.

Copper(II) complexes with 2-dimethylamino-3- picoline N-oxide (3MDM) and 2-diethylamino-3- picoline N-oxide (3MDE) have been prepared from the following salts: tetrafluoroborate, nitrate, chloride and bromide. Solids of the general formula [CuL2](BF4)2 and [CuLX2] where L=3MDM and 3MDE and X=NO3...

Bulk Cu(II)-Bis(2-Thio-6-Picoline-N-Oxide) (CuBTPNO) was synthesized and its chloroform solution was converted to nano CuBTPNO (average particle size: 20.0 nm) by the new micelle breaking route. The bulk CuBTPNO was also converted to copper oxide (CuO) nano particles (average particle size of 6....

A new monomer bearing N-trityl-l-serine methyl ester in structure, methacryloyloxyethyl carbamoyloxy–N-trityl methyl serine (MTS), was prepared to be further polymerized by atom transfer radical polymerization (ATRP) with pyrene-endcapped poly(methyl methacrylate) (Py–PMMA–Br) or poly(N-isopr...

For the first time, uniform optically active oligomers of methyl methacrylate with degrees of polymerization (DP) = 1, 2, 3, and 4 were obtained by the anionic polymerization of trityl methacrylate using 1,1-diphenylhexyl lithium/(−)sparteine, followed by the substitution of trityl for methyl, a...

A series of o-xylylene-type 1,4-amino alcohols, synthesized from (R)-1-phenylethylamine, were used as chiral ligands for the enantioselective addition of diethylzinc to benzaldehyde. (S)-1-Phenyl-1-propanol was obtained with high enantioselectivity in all cases since the stereochemical outcome o...

The utility of the intramolecular Nozaki-type coupling for the synthesis of macrocyclic benzo[b]thiophene-fused enediynes has been explored. The starting acyclic enediynes were prepared by the iodocyclization of 2-(buta-1,3-diynyl)thioanisoles followed by the Sonogashira cross-coupling of the re...

Two out of three rabbit anti-helodermin antisera previously shown to be useful for radioimmunoassay failed to detect up 100 ng of the peptide helodermin spotted directly on a nitrocellulose membrane. A lesser shortcoming of dot immunoassay was encountered with porcine PHI (peptide histidine-isol...

Methioninamide ester amide of squaric acid (1) has been analyzed structurally and IR-spectroscopically by means of ab initio calculations and solid-state linear-polarized IR-spectroscopy (IR-LD) of oriented solid-samples as suspension in nematic liquid crystal. The obtained data are compared wit...

A new family of O, N donor-functionalized (4-phenoxyphenylazo)-2-naphthol/4-substituted phenol-based ligands (HL1-HL4) has been synthesized. The prepared ligands were successfully utilized for the access of a series of ruthenium(II) carbonyl complexes of the type [Ru(L)Cl(CO)(EPh3)3] (E=phosphin...

A specific and sensitive HPLC-MS/MS method for the quantitative determination of valproic acid (VPA) and its metabolite, 2-propyl-4-pentenoic acid in human plasma has been developed, using VPA-d15 as the internal standard. The method was based on pre-column derivatization using 4-dimethylaminobe...