The structures of some azopigments obtained by diazotization of conjugated and unconjugated bile pigments with diazotized ethyl anthranilate were studied by mass spectrometry. The alpha(0)-azopigments derived from rat bile and human bile were shown to be identical (t.l.c. and mass spectra) with azobilirubin derived from unconjugated bilirubin. The presence of two methyl vinyl isomers (Ia) and (...

To improve the performances of p-Dye Sensitized Solar Cell (p-DSSC) for the future, the synthesis of modified p-type nickel oxide semiconductor, commonly used as photocathode in such devices, was initiated with Ni3O2(OH)4 as precursor. This specific nickel oxyhydroxide was first characterized by X-ray photo-electron spectroscopy and magnetic susceptibility measurements. Then its thermal decompo...

Thermal ammonolysis of quasi-two-dimensional (quasi-2D) CoTa2O6 yields the O2-/N3- and anionic vacancy ordered Co2+Ta5+2O6-xN2x/3$\Box$x/3 (x $\leq$ 0.15) that exhibits a transition from antiferromagnetism to defect engineered above room-temperature ferromagnetism as evidenced by diffraction, spectroscopic magnetic characterizations. First-principles calculations reveal origin is particular CoO...

We report efficient syntheses of the clinical agent cladribine (2-chloro-2'-deoxyadenosine, CldAdo), which is the drug of choice against hairy-cell leukemia and other neoplasms, from 2'-deoxyguanosine. Treatment of 3',5'-di-O-acetyl- or benzoyl-2'-deoxyguanosine (1) with 2,4,6-triisopropyl- or 4-methylbenzenesulfonyl chloride gave high yields of the 6-O-arylsulfonyl derivatives 2 or 2'b. Deoxyc...

I Coles, N., M. W. Bukenberger, and A. Meister, Biochemistry, 1, 317 (1962). Earliei work by Fraser, M. J., H. Shiniizu, and H. Gutfreund (Biochem. J., 72, 141 (1959)) also indicates that glutamine and glutamate are separately incorporated into RNA. 5 Coles et al.4 observed enzymatic formation of aspartyl-RNA, which gave aspartate on hydrolysis with N NH4OH at 260, and which gave isoasparagine ...

Incubation of mature sweet corn kernels of Zea mays in dilute solutions of (14)C-labeled indole-3-acetic acid leads to the formation of (14)C-labeled esters of myo-inositol, glucose, and glucans. Utilizing this knowledge it was found that an enzyme preparation from immature sweet corn kernels of Zea mays catalyzed the CoA- and ATP-dependent esterification of indole-3-acetic acid to myo-inositol...

The ammonia production properties upon reduction in hydrogen of the anti-perovskite nitrides Co3ZnN, Ni3ZnN, Co3InN, and Ni3InN have been investigated. Single phases with ideal structures (Space group: Pm-3m) were prepared for all by ammonolysis corresponding precursor oxides observed to produce high yields when reacted H2/Ar. cumulative values at 400 °C 3069, 2925, 289, 1029 μmol-NH3 g−1 Ni3In...