Various radiometal complexes have been developed for tumor imaging, especially Ga-68 tracer. In the present study, the development of a radiogallium bis-thiosemicarbazone complex has been reported. [67Ga] acetylacetonate bis(thiosemicarbazone) complex ([67Ga] AATS) was prepared starting [67Ga]Gallium acetate and freshly prepared acetylacetonate bis (thiosemicarbazone) (AATS) in 30 min at 90°...

Oxygenated volatile organic compounds (OVOCs) in the atmosphere are precursors to peroxy acetyl nitrate (PAN), affect the tropospheric ozone budget, and in the remote marine environment represent a significant sink of the hydroxyl radical (OH). The sparse observational database for these compounds, particularly in the tropics, contributes to a high uncertainty in their emissions and atmospheric...

About 500 species of wormwood are known in the world. In flora Azerbaijan, this genus is represented by 42 taxa. The main chemicals shown to be sesquiterpene lactones, coumarins, steroids, and essential oils. From aerial parts Artemisia campestris (var. Marschalliana) Spreng., collected during phenological phase budding, an acetone extract was obtained, which, after removal solvent, subjected c...

We have previously described the preparation and use of 9-O-[acetyl-3H]acetyl-N-acetylneuraminic acid to identify sialic acid O-acetylesterases in tissues and cells (Higa, H. H., Diaz, S., and Varki, A. (1987) Biochem. Biophys. Res. Commun. 144, 1099-1108). All tissues of the adult rat showed these activities, with the exception of plasma. Rat liver contained two major sialic acid esterases: a ...

Choline acetyltransferase (ChAT, acetyl-CoA-choline-O-acetyltransferase, EC 2.3.1.6) activity was measured in homogenates prepared from wild type (Canton S) and two temperature-sensitive presumed ChAT structural gene mutants (Chats1 and Chats2; originally described by Greenspan, R. (1980) J. Comp. Physiol. 137: 83-92) of Drosophila melanogaster. Wild type flies grown at 32 degrees C for 12 or 2...

In this study, some novel mono- and di-O-β-D-glycopyranosyl chalcone analogs were designed, synthesized, characterized. The derivatives synthesized with good yields by base-catalyzed Claisen-Schmidt condensation in EtOH solution. Then these chalcones reacted TAGBr (2,3,4,6-tetra-O-acetyl-μ-D-glucopyranosylbromide) dry acetone under the anhydrous condition at 0-5 °C. Deacylated was carried out Z...

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To expand the chemical and molecular diversity of biotransformation using whole-cell biocatalysts, we genetically engineered a pathway in Escherichia coli for heterologous production of butanone, an important commodity ketone. First, a 1-propanol-producing E. coli host strain with its sleeping beauty mutase (Sbm) operon being activated was used to increase the pool of propionyl-coenzyme A (prop...