Experimental evidence for the presence in mustard seedlings of an esterase that catalyzes the hydrolysis of sinapine into sinapic acid and choline has been presented previously (12). It was felt that further studies on this enzyme might be of some general biochemical interest. A preparation of sinapine esterase purified 20fold has been obtained from white mustard seedlings (Brassica hirta Moenc...

Commercial poly(p-phenylene sulfide) (PPS) was thermally cured, which resulted in an increase of molecular weight due to cross-linking. Non-isothermal crystallization studies of samples cured for up to 7 days at 250 ̊C showed a monotonous increase of crystallization temperature compared to pure PPS. However, a further increase of curing time decreased the crystallization temperature. The change ...

Higher solubility at alkaline conditions is very significant for an efficient treatment process of gaseous H2S(g) by reducing the gas–liquid ransfer limitations. Nevertheless, the alkaline biodegradation process of H2S can be limited when sulfide concentrations are inhibitory. At alkaline onditions (pH > 9), the abiotic chemical sulfide oxidation can attain relatively high rates. A series of ab...

High-resolution infrared and microwave spectra of He(N)-carbonyl sulfide (He(N)-OCS) clusters with N ranging from 2 to 8 have been detected and unambiguously assigned. The spectra show the formation of a solvation layer beginning with an equatorial "donut" of five helium atoms around the OCS molecule. The cluster moment of inertia increases as a function of N and overshoots the liquid droplet l...

A mixture of the two isomers of 1-chlorophospholene-l-oxide, obtained by a one-step, high-yield procedure reported previously1, upon reaction with P4S10 was converted to a mixture of the two isomers of 1-chlorophospholene-l-sulfide which may be separated by spinning-band distillation. The thus obtained isomerically pure 1-chlorophospholene-1sulfides were hydrolyzed to the corresponding 1-hydrox...

Abstract We report our investigations of the electrical resistivity, Seebeck coefficient, thermal conductivity, and heat capacity on the ternary sulfide NiV2S4 as a function of temperature. All measured physical quantities exhibit pronounced anomalies at around 165 K, with a significant hysteresis of about 10 K. The results of electrical transport measurements show conventional metallic-like ch...

Single crystals of manganese(II) octa-uranium(IV) hepta-deca-sulfide, MnU(8)S(17), were grown from the reaction of the elements in a RbCl flux. MnU(8)S(17) crystallizes in the space group C2/m in the CrU(8)S(17) structure type. The asymmetric unit is composed of the following atoms with site symmetries shown: U1 (1), U2 (m), U3 (m), Mn1 (2/m), S1 (1), S2 (1); S3 (m), S4 (m), S5 (m), S6 (m) and ...

Asymmetric synthesis of the sulfide lactones 12 and 13 in excellent enantiopurity is achieved by reduction of cyclohexanone derivative 10 using baker’s yeast, followed by acid catalysed cyclisation. The outcome of the yeast reduction is very sensitive to the reaction conditions employed. Transformation of 12 to the α-diazosulfoxide 4 (≥98%ee) and rhodium acetate catalysed decomposition of this ...

Five new sulfide diketopiperazine derivatives, namely, penicibrocazines A-E (1-5), along with a known congener (6), were isolated and identified from the culture extract of Penicillium brocae MA-231, an endophytic fungus obtained from the fresh tissue of the marine mangrove plant Avicennia marina. The structures of these compounds were elucidated by detailed interpretation of NMR and mass spect...

The synthesis, properties and reactivity of group 11 organotin sulfide clusters [(R(1)Sn)4(SnCl)2(MPPh3)2S8] (M = Cu, Ag), [(R(3)Sn)10Ag10S20], and [(R(1,3)Sn)2(AuPPh3)2S4] with covalently bound, carbonyl or hydrazine-terminated ligands R(1) = CMe2CH2C(Me)O or R(3) = CMe2CH2C(Me)NNH2 are reported.