The title compound, dimethyl 10b'-(4-fluorostyryl)-8',9'-dimethoxy-4-nitro-5',6'-dihydrospiro[9H-fluorene-9,1'(10b'H)-pyrrolo[2,1-a]isoquinoline]-2',3'-dicarboxylate, C38H31FN2O8, is a new photochromic tetrahydroindolizine. One of the C-C bonds at the spiro C atom is very long [1.630 (2) A], thus explaining the photochromic behaviour.

N-Acetylaspartate is a highly specific marker for neurons and is present at high concentrations in the central nervous system. It is not present at detectable levels anywhere else in the body other than brain. Glial cells express a high-affinity transporter for N-acetylaspartate, but the molecular identity of the transporter has not been established. The transport of N-acetylaspartate into glia...

The dctA gene, coding for the dicarboxylate transport protein, has an inducible promoter dependent on activation by the two-component sensor-regulator pair DctB and DctD. LacZ fusion analysis indicates that there is a single promoter for dctB and dctD. The dctA promoter is also induced by nitrogen limitation, an effect that requires DctB-DctD and NtrC. DctB alone is able to detect dicarboxylate...

Dye-sensitized solar cells (DSCs) have been explored for more than a decade for realistic photovoltaic applications owing to their high conversion efficiency and low cost. Molecular engineering of the sensitizers to achieve high photovoltaic performance and long-term device stability is one of the critical strategies. Since the first high-efficiency ruthenium-based sensitizer, cis-di(thiocyanat...

Arabidopsis (Arabidopsis thaliana) mutants lacking the tonoplastic malate transporter AttDT (A. thaliana tonoplast dicarboxylate transporter) and wild-type plants showed no phenotypic differences when grown under standard conditions. To identify putative metabolic changes in AttDT knock-out plants, we provoked a metabolic scenario connected to an increased consumption of dicarboxylates. Acidifi...

BACKGROUND C4-dicarboxylic acids, including malic acid, fumaric acid and succinic acid, are valuable organic acids that can be produced and secreted by a number of microorganisms. Previous studies on organic acid production by Aspergillus carbonarius, which is capable of producing high amounts of citric acid from varieties carbon sources, have revealed its potential as a fungal cell factory. Ea...

We report on the tetraruthenium macrocycles Ru4-5 and -6 with a π-conjugated pyrene-appended 5,8-divinylquinoxaline ligand either isophthalate or thiophenyl-2,5-dicarboxylate linkers their charge-transfer salts formed by oxidation two equivalents of F4TCNQ. Both macrocyclic complexes were characterized NMR spectroscopy, mass spectrometry, cyclic square-wave voltammetry, IR, UV–vis–NIR, EPR spec...

A topological isomer based on Zn2 paddlewheel, dicarboxylate, and diamine ligands is synthesized by solvothermal methods after careful modulation of the reaction conditions. The new framework is characterized by a pillared Kagome net topology and possesses a sustainable pore structure with high surface area (approximately 2400 m2/g) and large hexagonal channels (approximately 15 A).

A 3.6-kb EcoRI fragment containing the ntrA gene of Agrobacterium tumefaciens was cloned by using the homologous ntrA gene of Rhizobium meliloti as a probe. Construction of an ntrA mutant of A. tumefaciens by site-directed insertional mutagenesis demonstrated the requirement of the ntrA gene for nitrate utilization and C4-dicarboxylate transport but not for vir gene expression or tumorigenesis.