Introduction: Testicular torsion is a surgical emergency which requires early diagnosis and prompt surgical management to avoid testicular damage. The aim of this study is to survey the clinical findings and outcome of the patients treated for testicular torsion in a university hospital in Babol, northern Iran. Methods: In this cross sectional study, a retrospective survey of all cases presenti...

Suppose that A is a unital purely infinite simple C∗-algebra. If the class [1] of the unit 1 in K0(A) has torsion, then csr(A) = ∞; if [1] is torsion-free in K0(A), then csr(A) = 2. If A is a non-unital purely infinite simple C∗-algebra, then csr(A) = 2. Before considering the connected stable rank of the purely infinite simple C∗algebra, we need to introduce some notation as follows. For the C...

Amodel for torsional vibration of slender thin-walled tubes with constrained-layer dampers is developed. Assuming that the deformation obeys the Saint-Venant hypotheses, we develop a model suitable for prediction of the complex stiffness per unit length in closed, thin-walled tubes whose walls consist of laminated elastic and viscoelastic layers, and formulate a boundary-value problem for the w...

(2S,4R)-4-Hydroxyproline(4-nitrobenzoate) was synthesized. The crystal structure revealed an exo ring pucker, with the nitrobenzoate pseudoaxial on the pyrrolidine envelope and antiperiplanar to C(β) and C(δ) C-H bonds. The unit cell exhibited variation in C(δ)-H/C(γ)-O and C(β)-H/C(γ)-O torsion angles, with a 15° increase in torsion angle (148° to 163°) observed to result in a 0.018 Å decrease...

The title compound, C(15)H(19)NO(4), contains one crystallographically independent mol-ecule in the asymmetric unit. The N-O-C-O torsion angle is 1.97 (9)°. The two pairs of vicinal H atoms that lie above or below the plane defined by the five-membered pyrrolidine-2,5-dione ring are an average of 6.57 (5)° from being eclipsed. The average absolute C-C-C-C torsion angle in the adamantane skeleto...

The asymmetric unit of the title compound, C(14)H(10)FN(3)OS(2), contains two independent mol-ecules which differ in the relative orientations of the triazole and allyl-sulfanyl groups with respect to the planar thio-chromen-4-one frameworks. The N-N-C-C torsion angles are 128.2 (5) and -120.9 (5)°, while the C-S-C-S torsion angles are -17.4 (4) and 16.4 (4)°. In the crystal, inter-molecular C-...

In the title compound, C(14)H(10)Cl(2)O(2)S, the product of a base-catalyzed condensation followed by deca-rboxylation of the carboxyl-ate group of the sulfonyl derivative, the configuration of the alkene unit is E. The torsion angle between the alkene unit and the 2,6-dichloro-phenyl ring system is -40.8 (3)°. The dihedral angle between the rings is 80.39 (7)°.

In the title compound, C(13)H(12)N(2)O(4), the almost planar (r.m.s. deviation = 0.012 Å) dioxoindolinyl unit and the envelope-shaped oxazolidine ring (with the methyl-ene C atom bonded to the N atom as the flap) are linked by a -CH(2)-CH(2)- bridge, in which the N-C-C-N unit adopts a gauche conformation [torsion angle = 62.7 (2)°].

Two independent half-mol-ecules, each being completed by inversion symmetry, comprise the asymmetric unit of the title compound, C(14)H(16)N(2)S(2). The major difference between the mol-ecules is found in the central C-C bond [the C-N-C-C torsion angles are 114.66 (18) and 128.94 (18)° in the two mol-ecules]. The thio-phene and imine groups are almost co-planar in each case [S-C-C-N torsion ang...

Eighty-one Nigerian patients with testicular torsion presented at the Urology Unit of the Lagos University Teaching Hospital between May 1983 and May 1985. The majority (62%) were young adults of 21 years and above with a mean of 21.3 +/- 5.2 years. Fifty-four testes found to be clinically non viable at exploration were excised and microscopically confirmed as haemorrhagic infarction due to the...