Nitric oxide production is involved in maintaining energy state in Alfalfa (Medicago sativa L.) nodulated roots under both salinity and flooding.

In Medicago sativa nodulated roots, NR-dependent NO production is involved in maintaining energy state, presumably through phytoglobin NO respiration, under both salinity and hypoxia stress. The response to low and average salinity stress and to a 5 day-long flooding period was analyzed in M. sativa nodulated roots.

Use of Head Guards in AIBA Boxing Tournaments-A Cross-Sectional Observational Study.

Objective: This study looks at the changes in injuries after the implementation of a new rule by the International Boxing Association (AIBA) to remove head guards from its competitions.

Design: A cross-sectional observational study performed prospectively. This brief report examines the removal of head guards in 2 different ways.

Bis[4-(di-methyl-amino)-pyridinium] tetra-chlorido-cuprate(II).

The asymmetric unit of the title salt, (C7H11N2)2[CuCl4], comprises half a tetrahedral tetra-chlorido-cuprate anion, being located on a twofold axis, and a protonated 4-(di-methyl-amino)-pyridine cation. The geometry around the Cu(II) ion is highly distorted with the range of Cl-Cu-Cl angles being 94.94 (1)-141.

Bis(3-amino-pyrazine-2-carboxyl-ato-κ(2) N (1),O)di-aqua-nickel(II) dihydrate.

In the title compound, [Ni(C5H4N3O2)2(H2O)2]·2H2O, the Ni(II) ion lies on an inversion center and is coordinated in an slightly distorted octa-hedral environment by two N,O-chelating 3-amino-pyrazine-2-carboxyl-ate (APZC) ligands in the equatorial plane and two trans-axial aqua ligands. In the crystal, O-H⋯O, N-H⋯O and O-H⋯N hydrogen bonds involving the solvent water mol-ecules, aqua and APZC ligands form layers parallel to (010). These layers are linked further via O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds involving the axial aqua ligands, amino groups and the carboxyl-ate groups of the APZC ligands, forming a three-dimensional network.