272 research outputs found
EP-1171: Testing the feasibility of integration of an in vivo dosimetry procedure in quality assurance of pelvic 3DCRT
cis-Bis(2,2′-bipyridine-κ2 N,N′)bisÂ(dimethyl sulfoxide-κO)zinc bisÂ(tetraÂphenylÂborate) dimethyl sulfoxide monosolvate
In the mononuclear title complex, [Zn(C10H8N2)2(C2H6OS)2](C24H20B)2·C2H6OS, the ZnII ion is coordinated by four N atoms of two bidentate 2,2′-bipyridine molÂecules and by the O atoms of two cis-disposed dimethyl sulfoxide molÂecules in a distorted octaÂhedral geometry. The S atom and the methyl groups of one of the coordinated dimethyl sulfoxide molÂecules are disordered in a 0.509 (2):0.491 (2) ratio. The crystal packing is stabilized by C—H⋯O hydrogen bonds between the dimethyl sulfoxide solvent molÂecules and tetraÂphenylÂborate anions
DiaquaÂbisÂ(pyridine-2-carboxylÂato-κ2 N,O)manganese(II) dimethylÂformamide hemisolvate
There are two crystallographically independent complex molÂecules with very similar geometries in the unit cell of the title compound, [Mn(C6H4NO2)2(H2O)2]·0.5C3H7NO. The central ion is situated in a distorted octaÂhedral environment of two N- and four O-donor atoms from two pyridine-2-carboxylÂate ligands and two cis-disposed water molÂecules. The carboxylÂate ligands are coordinated in a chelate fashion with the formation of two five-membered rings. In the crystal, the complex molÂecules are connected by O—H⋯O hydrogen bonds between the coordinated water molÂecules and the uncoordinated carboxylÂate O atoms, thus forming hydrogen-bonded walls disposed perpendicularly to the bc plane
fac-Tris(pyridine-2-carboxylÂato-κ2 N,O)cobalt(III)
In the title compound, [Co(C6H4NO2)3], the CoIII ion lies on a threefold rotation axis and is in a distorted octaÂhedral environment defined by three N and three O donor atoms from three fac-disposed pyridine-2-carboxylÂate ligands. The ligands are coordinated in a chelate fashion, forming three five-membered rings. In the crystal, translationally related complex molecules are organized into columns along [001] via C—H⋯O hydrogen bonds
High-speed and high-resolution interrogation of FBG sensors using wavelength-to-time mapping and Gaussian filters
In this work we report a novel intensity-based technique for simultaneous high-speed and high-resolution interrogation of fiber Bragg grating (FBG) sensors. The method uses a couple of intensity Gaussian filters and the dispersion-induced wavelength-to-time mapping effect. The Bragg wavelength is retrieved by means of the amplitude comparison between the two filtered grating spectrums, which are mapped into a time-domain waveform. In this way, measurement distortions arising from residual power due to the grating sidelobes are completely avoided, and the wavelength measurement range is considerably extended with respect to the previously proposed schemes. We present the mathematical background for the interrogation of FBGs with an arbitrary bandwidth. In our proof-of-concept experiments, we achieved sensitivities of ∼20 pm with ultra-fast rates up to 264 MHz
Transport of Anthocyanins and other Flavonoids by the Arabidopsis ATP-Binding Cassette Transporter AtABCC2
Flavonoids have important developmental, physiological, and ecological roles in plants and are primarily stored in the large central vacuole. Here we show that both an ATP-binding cassette (ABC) transporter(s) and an H+-antiporter(s) are involved in the uptake of cyanidin 3-O-glucoside (C3G) by Arabidopsis vacuolar membrane-enriched vesicles. We also demonstrate that vesicles isolated from yeast expressing the ABC protein AtABCC2 are capable of MgATP-dependent uptake of C3G and other anthocyanins. The uptake of C3G by AtABCC2 depended on the co-transport of glutathione (GSH). C3G was not altered during transport and a GSH conjugate was not formed. Vesicles from yeast expressing AtABCC2 also transported flavone and flavonol glucosides. We performed ligand docking studies to a homology model of AtABCC2 and probed the putative binding sites of C3G and GSH through site-directed mutagenesis and functional studies. These studies identified residues important for substrate recognition and transport activity in AtABCC2, and suggest that C3G and GSH bind closely, mutually enhancing each other’s binding. In conclusion, we suggest that AtABCC2 along with possibly other ABCC proteins are involved in the vacuolar transport of anthocyanins and other flavonoids in the vegetative tissue of Arabidopsis
The Complexity of Hydration of Phloroglucinol: A Comprehensive Structural and Thermodynamic Characterization
INCENTIVOS À PRODUÇÃO DE FRUTAS E AS MUDANÇAS NA AGRICULTURA DA REGIÃO NORTE DO ESTADO DO RIO DE JANEIRO
Infrastructure for collaborative science and societal applications in the Columbia River estuary
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