N2 fixation by Streptomyces thermoautotrophicus follows the equation N2 + 4-12MgATP + 8H+ + 8e- --> 2NH3 + H2 + 4-12MgADP + 4-12Pi and exhibits features which are not obvious in the diazotrophic bacteria studied so far. The reaction is coupled to the oxidation of carbon monoxide (CO) by a molybdenum-containing CO dehydrogenase that transfers the electrons derived from CO oxidation to O2, thereb...

Starting from the classical r-matrix of the non-standard (or Jordanian) quantum deformation of the sl(2,R) algebra, new triangular quantum deformations for the real Lie algebras so(2, 2), so(3, 1) and iso(2, 1) are simultaneously constructed by using a graded contraction scheme; these are realized as deformations of conformal algebras of (1 + 1)-dimensional spacetimes. Timetype and space-type q...

We present a 1-parameter family of finite action solutions to the S0(2, 1) Hitchin’s equations and explore some of its basic properties. For a fixed value of the parameter, the solution is smooth. We conclude by showing a multi-particle generalization of our basic solutions.

Glasses, whe n heated , undergo a gradu a l co nt inuous change from so li ds to iiq uids over a rather Wide te mperature range. As a co nseq uence, it has bee n fo und necessar y to d efi ne certall1 te mperature r eference poin ts in t his t ra nsit io n range so t hat different glasses m ay be co mpared w:ith each other. These poin ts a re chose n to co rrespond to establi shed stages In t h...

In the title compound, C(10)H(12)ClNO(3)S, the amide H atom is syn with respect to the ortho-chloro group in the benzene ring and the C-S-N-C torsion angle is 64.35 (16)°. The benzene ring and the SO(2)-NH-CO-C segment form a dihedral angle of 87.4 (1)°. The crystal structure features inversion-related dimers linked by pairs of N-H⋯O hydrogen bonds.

The asymmetric unit of the title compound, C(8)H(8)ClNO(3)S, contains two independent mol-ecules in which the C-S-N-C torsion angles are -71.7 (3) and 61.2 (3)°. The benzene rings and the SO(2)-NH-CO-C segments form dihedral angles of 80.2 (1) and 88.1 (2)° in the two independent mol-ecules. In the crystal, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into chains in the b-axis direc...

The structure of the title compound, [Co(II)(C(2)H(8)N(2))(3)]SO(4), the cobalt example of [M(C(2)H(8)N(2))(3)]SO(4), is reported. The Co and S atoms are located at the 2d and 2c Wyckoff sites (point symmetry 32), respectively. The Co atom is coordinated by six N atoms of three chelating ethyl-enediamine mol-ecules generated from half of the ethyl-enediamine mol-ecule in the asymmetric unit. Th...