The testicular torsion which is typically seen in prepuberty is very rare in the early neonatal period; prenatal diagnosis is difficult. Herein, we report a five day-old male neonate with swelling and erythema of the right scrotum.  Following Doppler ultrasound suggestive of testicular torsion, surgical exploration was undertaken. There was gangrene of the right testis with discoloration and ne...

Elastin is an extracellular-matrix protein that imparts elasticity to tissues. We have used solid-state NMR to determine a number of distances and torsion angles in an elastin-mimetic peptide, (VPGVG)3, to understand the structural basis of elasticity. C-H and C-N distances between the V6 carbonyl and the V9 amide segment were measured using 13C-15N and 13C-1H rotational-echo double-resonance e...

We show that several torsion free 3-manifold groups are not left-orderable. Our examples are groups of cyclic branched coverings of S branched along links. The figure eight knot provides simple nontrivial examples. The groups arising in these examples are known as Fibonacci groups which we show not to be left-orderable. Many other examples of non-orderable groups are obtained by taking 3-fold b...

In this paper, we study the SL2(C) character variety of a hyperbolic link in S. We analyze a special smooth projective variety Y h arising from some 1-dimensional irreducible slices on the character variety. We prove that a natural symbol obtained from these 1-dimensional slices is a torsion in K2(C(Y )). By using the regulator map from K2 to the corresponding Deligne cohomology, we get some va...

The asymmetric unit of the title compound, C30H46N6O4, contains one half-mol-ecule. The C(benzene)-C(CH2)-N-C(-Me) torsion angle is -79.89 (13)° suggesting a synclinal orientation of the nitro-benzene ring with respect to the macrocycle. The conformation of the macrocycle is stabilized by intra-molecular N-H⋯N hydrogen bonds.

The asymmetric unit of the title compound, C(11)H(14)N(2)O(3), contains two independent mol-ecules with close conformations; the C=N-N-C torsion angle is 176.4 (1)° in both mol-ecules. In the crystal, inter-molecular N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into chains running along the [01] direction.

The asymmetric unit of the title compound, C(18)H(12)N(6)S(2), contains one half-mol-ecule situated on a twofold rotational axis that passes through the mid-point of the S-S bond. In the mol-ecule, the C-S-S-C torsion angle is 81.33 (7)°. The crystal packing exhibits no significantly short inter-molecular contacts.

In the title compound, C(7)H(7)FN(2)S, the aromatic ring plane and the thio-urea unit are twisted with a torsion angle C-C-N-C7 of 44.6 (2)°. In the crystal, N-H⋯S and N-H⋯F inter-molecular hydrogen bonds link the mol-ecules into infinite sheets that are stacked along the c axis.

The title compound, C28H40N2O2S2, was obtained as a minor product from an anti-aldol reaction between the corresponding N-propionyl-thiol-actam and benzaldehyde. The asymmetric unit contains one half-molecule, which is completed by inversion symmetry. The molecule displays a nearly eclipsed conformation along the central C-C bond with a C-C-C-C- torsion angle of 20.4 (3)°.

We investigate the possible character values of torsion units of thenormalized unit group of the integral group ring of Mathieu sporadic groupM22. We confirm the Kimmerle conjecture on prime graphs for this group andspecify the partial augmentations for possible counterexamples to the strongerZassenhaus conjecture.