The Pairing of Spin-orbit Coupled Fermi Gas in Optical Lattice

We investigate Rashba spin-orbit coupled Fermi gases in square optical lattice by using the determinant quantum Monte Carlo (DQMC) simulations which is free of the sign-problem. We show that the Berezinskii-Kosterlitz-Thoules phase transition temperature is firstly enhanced and then suppressed by spin-orbit coupling in the strong attraction region. In the intermediate attraction region, spin-orbit coupling always suppresses the transition temperature. We also show that the spin susceptibility becomes anisotropic and retains finite values at zero temperature.Comment: 10 pages, 9 figure

A novel buckwheat protein with a beneficial effect in atherosclerosis was purified from Fagopyrum tataricum (L.) Gaertn.

Buckwheat seeds contain many kinds of functional compounds that are of benefit to patients with cardiovascular disease. In this research, a water-soluble buckwheat protein was isolated and purified through a DEAE-Sepharose anion exchange column and Sephadex G-75 gel chromatography. The isolated buckwheat protein fractions exhibited hypocholesterolemic activity in a HepG2 cell model and demonstrated prominent bile acid salt-binding activity in an in vitro assay. The antioxidative activity of protein fractions with hypolipidemic effects was detected in a free radical scavenging experiment. The buckwheat protein fraction with the most obvious hypolipidemic activity and free radical scavenging activity was named as WSBWP. Its molecular weight was estimated by SDS-PAGE electrophoresis to be 38 kDa. It could become a potential candidate in the treatment of atherosclerosis

2-[1-Chloro-3-(2-methyl-5-nitro-1H-imidazol-1-yl)propan-2-yloxycarbonyl]benzoic acid

The asymmetric unit of the title compound, C15H14ClN3O6, contains two independent mol­ecules. The imidazole rings are oriented with respect to the benzene rings at dihedral angles of 19.66 (3) and 21.64 (3)°. In the crystal structure, inter­molecular O—H⋯N hydrogen bonds link the mol­ecules into infinite chains

Hexaaqua­cobalt(II) 4,4′-(1,2-dihy­droxy­ethane-1,2-di­yl)dibenzoate monohydrate

The title compound, [Co(H2O)6](C16H12O6)·H2O, is composed of one 4,4′-(1,2-dihy­droxy­ethane-1,2-di­yl)dibenzoate anion lying on an inversion center, one [Co(H2O)6]2+ dicationic complex and a solvent water mol­ecule located on mirror planes. In the crystal, a chain is constructed via O—H⋯O hydrogen bonds involving the carboxyl­ate and hydroxyl groups of the organic anion; the chains are further connected into a three-dimensional framework by additional O—H⋯O hydrogen bonds between the [Co(H2O)6]2+ cations, solvent water mol­ecules and the anions

Effects of manganese-excess on CO2 assimilation, ribulose-1,5-bisphosphate carboxylase/oxygenase, carbohydrates and photosynthetic electron transport of leaves, and antioxidant systems of leaves and roots in Citrus grandis seedlings

<p>Abstract</p> <p>Background</p> <p>Very little is known about the effects of manganese (Mn)-excess on citrus photosynthesis and antioxidant systems. Seedlings of sour pummelo (<it>Citrus grandis</it>) were irrigated for 17 weeks with nutrient solution containing 2 μM (control) or 500 μM (excess) MnSO₄. The objective of this study were to understand the mechanisms by which Mn-excess leads to a decrease in CO₂assimilation and to test the hypothesis that Mn-induced changes in antioxidant systems differ between roots and leaves.</p> <p>Results</p> <p>Mn-excess decreased CO₂assimilation and stomatal conductance, increased intercellular CO₂concentration, but did not affect chlorophyll (Chl) level. Both initial and total ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) activity in Mn-excess leaves decreased to a lesser extent than CO₂assimilation. Contents of glucose, fructose, starch and total nonstructural carbohydrates did not differ between Mn-excess leaves and controls, while sucrose content was higher in the former. Chl a fluorescence (OJIP) transients from Mn-excess leaves showed increased O-step and decreased P-step, accompanied by positive L- and K-bands. Mn-excess decreased maximum quantum yield of primary photochemistry (F_v/F_m) and total performance index (PI_tot,abs), but increased relative variable fluorescence at I-steps (V_I) and energy dissipation. On a protein basis, Mn-excess leaves displayed higher activities of monodehydroascorbate reductase (MDAR), glutathione reductase (GR), superoxide dismutase (SOD), catalase (CAT) and guaiacol peroxidase (GPX) and contents of antioxidants, similar ascorbate peroxidase (APX) activities and lower dehydroascorbate reductase (DHAR) activities; while Mn-excess roots had similar or lower activities of antioxidant enzymes and contents of antioxidants. Mn-excess did not affect malondialdehyde (MDA) content of roots and leaves.</p> <p>Conclusions</p> <p>Mn-excess impaired the whole photosynthetic electron transport chain from the donor side of photosystem II (PSII) up to the reduction of end acceptors of photosystem I (PSI), thus limiting the production of reducing equivalents, and hence the rate of CO₂assimilation. Both the energy dissipation and the antioxidant systems were enhanced in Mn-excess leaves, while the antioxidant systems in Mn-excess roots were not up-regulated, but still remained high activity. The antioxidant systems in Mn-excess roots and leaves provided sufficient protection to them against oxidative damage.</p