This paper presents an investigation of yellow pigments based on lead, tin and antimony through X-ray fluorescence spectroscopy with the aim of comparing portable and laboratory instruments and discussing the potential application on artworks. Artificial yellow pigments, based on Pb-Sb-Sn, and p...

Yellow Monascus pigments were prepared from fermentation broth after extractive fermentation in nonionic surfactant micelle aqueous solution. First, Monascus pigments were transferred from nonionic surfactant micelle aqueous solution into ionic liquid phase by ionic liquid based microemulsion ex...

Synthetic kenyaite is prepared in the system K2O–SiO2–H2O. It is modified with cobalt and platinum in order to obtain catalysts for complete oxidation of n-hexane and benzene. The prepared samples are characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogr...

The new salt, tetra-n-butylammonium bis(benzene-1,2-dithiolato(2−)-κ2S,S′)platinate(III), [NBu4][Pt(C6H4S2)2] (1), has been synthesized in ethanol/water, and fully characterized by single crystal X-ray structure determination. The central platinum in the complex ion [Pt(bdt)2]− is tetracoordin...

β-Neohesperidose hepta-acetate has been synthesized directly from 1,3,4,6-tetra-O-acetyl-β-D-glucopyranose and an improved method of preparation from the anomeric 1,3,4,6-tetra-O-acetyl-α-D-glucopyranose is described. The free sugar was obtained by deacetylation of the hepta-acetate and cryst...

A straightforward semisynthesis of neohesperidose was performed in three-steps with 43% overall yield starting from naringin, the main flavonoid of grapefruit. In addition, the behaviour of two pairs of flavonoid 7-O-rhamnoglucosides (neohesperidosides naringin and rhoifolin; rutinosides hesperi...

N-(2-hydroxyphenyl)-2-propylpentanamide (HO-AAVPA) is a novel valproic acid derivative that has shown anti-proliferative activity against epitheloid cervix carcinoma (HeLa), rhabdomyosarcoma (A204), and several breast cancer cell lines. The aim of this research was to evaluate the pharmacokineti...

Luminescent complexes [fac-Re(CO)3(Y∩X)(ph-imz)] where (Y∩XH) = H2-PBI = 2-(2′-hydroxyphenyl)-1H-benzimidazole, H-PB0 = 2-(2′-hydroxyphenyl)benzoxazole for 2, and H-PBT = 2-(2′-hydroxyphenyl)benzothiazole for 3 and ph-imz = 2-phenylimidazole) were synthesized using Re2(CO)10, H2-PBI/H-PBO/H...

In this study we present a synthesis of six-membered BF2complexes with N–B–O type linkage based on 2-(2-hydroxyphenyl)-4-phenylquinazolines and 2-(2-hydroxyphenyl)quinoxaline. The photophysical properties of compounds were studied by absorption and fluorescence spectroscopy and compared with p...

We have studied the nonlinear optical properties for synthesized materials by using the Z-scan technique, in order to measure nonlinear refractive indices. The nonlinear optical properties of synthesized N-(2-hydroxyphenyl)-2-propylpentanamide (HO-AAVPA), in micellar aqueous solution of F127, we...

To efficiently produce 1,3-adamantanediol (1,3-ad(OH)2) from 1-adamantanol (1-adOH), our stocks of culture strains and soil microorganisms were surveyed for hydroxylation activity towards 1-adOH. Among them, the soil actinomycete SA8 showing the highest hydroxylation activity was identified as S...

Poly (N,N′-bis-sulphinyl p-phenylenediamine-2,6-diaminipyridine) (PBSPDP) and poly (N,N′-bis-sulphinyl p-phenylenediamine-3,5-diamine-1,2,4-trizole) (PBSPDT) were synthesized by Micheal addition polymerization method using thionyl chloride and characterized by the FTIR and 1H NMR techniques. T...

The free-radical addition of arylsulfonyl chlorides to α-methylstyrene in the presence of copper chloride is accompanied by the dehydrochlorination of the adducts formed.

Although ICR 191 has been reported to act as an intercalating and alkylating mutagen in prokaryotes, it is not clear that it acts as a mutagen in eukaryotes. Therefore, we looke for evidence that this acridine half-mustard induces DNA repair in haploid Rana pipiens or in diploid human fibroblast...

Uptakes of pyruvic acid for two types of commercially available weakly basic polymer sorbents, D301G and D301R, have been measured over a wide pH range and at various salinities of MgSO4. The results show that the overloading adsorption of pyruvic acid occurs on both weakly basic polymer sorbent...

The hydrogen sorption properties of TiCl3-catalyzed Ca(BH4)2 prepared by high energy ball milling have been investigated. It is demonstrated that Ca(BH4)2 can be rehydrogenated under 90 bar of hydrogen at 623 K after undergoing a dehydrogenation reaction. The hydrogen content of the rehydrogenat...

The reactivity and thermal decomposition of γ-Mg(BH4)2-MHx, M = Li, Na, Mg, and Ca composites has been examined with the objective of studying the hydrogen storage capability of the composites. The samples were prepared by manual grinding γ-Mg(BH4)2 with a metal hydride to obtain homogenous mi...

Calcium borohydride is found to hydroborate unsaturated systems in the presence of ethyl acetate. The reaction exhibits remarkable selectivity towards terminal double bonds. Several Z-11-alken-1-ol pheromones are synthesized using this method.

Ca(BH4)2 compounds were investigated above room temperature by anelastic spectroscopy (AS) and concomitant measurements of thermogravimetry and mass spectrometry (TGA/MS). Both AS and TGA/MS indicate that even after a thermal treatment at 125 °C for 20 h, a non-negligible residual of THF adduct...

Bimetallic borohydride borate LiCa3(BH4)(BO3)2 forms during decomposition of LiBH4–Ca(BH4)2–carbon composite studied for hydrogen storage. We present LiCa3(BH4)(BO3)2 as a material suitable for solid state electrolytes. The compound was studied by in situ Synchrotron Radiation X-ray Powder Dif...