5-(1H-Imidazol-1-ylsulfon-yl)-N,N-dimethyl-naphthalen-1-amine.

In the title mol-ecule, C(15)H(15)N(3)O(2)S, the dihedral angle between the naphthalene ring system and the imidazole ring is 86.1 (2)°. In the crystal structure, weak inter-molecular C-H⋯O and C-H⋯N hydrogen bonds, as well as weak C-H⋯π inter-actions, connect mol-ecules, forming a two-dimensional network.

[N-(5-Bromo-2-oxidobenzyl-idene)-l-valin-ato-κO,N,O']diethyl-tin(IV).

The Sn atom of the title compound, [Sn(C(2)H(5))(2)(C(12)H(12)BrNO(3))], is in a distorted SnNC(2)O(2) trigonal-bipyramidal geometry and forms five- and six-membered chelate rings with the tridentate ligand. One C atom of one ethyl group is disordered with site occupancies of 0.61 (3):0.

2-(4-Amino-phen-yl)-1,3-benzoxazole.

In the title mol-ecule, C(13)H(10)N(2)O, the dihedral angle between the benzoxazole ring system and the benzene ring is 11.8 (1)°. In the crystal structure, mol-ecules are linked by inter-molecular N-H⋯N hydrogen bonds and π⋯π inter-actions [centroid-centroid distance = 3.

Label-free electrochemical detection of DNA using ferrocene-containing cationic polythiophene and PNA probes on nanogold modified electrodes.

A label-free electrochemical method for the detection of DNA-PNA hybridization using a water-soluble, ferrocene-functionalized polythiophene transducer and single-stranded PNA probes on the nanogold modified electrode is investigated. Nanogold modified electrodes can largely increase the immobilization amount of ss-PNA capture probe and lead to an increase of the electrical signal. The ferrocene-containing cationic polythiophene do not interact electrostatically with the PNA probes due to the absence of the anionic phosphate groups on the PNA probes.

Bis[bis-(1H-benzimidazol-2-ylmeth-yl)amine]copper(II) dichloride methanol disolvate dihydrate.

In the title compound, [Cu(C(16)H(14)N(5))(2)]Cl(2)·2CH(4)O·2H(2)O, the cationic metal complex resides on a crystallographic centre of inversion, with the Cu(2+) bonded to two bis-(1H-benzimidazol-2-ylmeth-yl)amines (IDB). The coordination geometry of the Cu(2+) ion is distorted octa-hedral with an N(6) ligand set. A three-dimensional framework structure is formed by means of hydrogen bonds and π-π inter-actions formed between imidazole and phenyl rings, and between phenyl and phenyl rings, with centroid-to-centroid distances of 3.

[Effect of different analgesia on pain relief during labor].

Objective: To evaluate the effect of spinal-epidural and epidural anesthesia for pain relief in labor.

Methods: Totally 6671 cases selected from pregnant women delivered from Aug. 2001 to Oct.

[Influence of combined spinal-epidural analgesia and epidural analgesia on the progress of labor].

Objective: To investigate the influence of combined spinal-epidural analgesia (CSEA) and epidural analgesia (EA) and patient-controlled epidural analgesia (PCEA) on labor progress.

Methods: The partograms of 722 healthy vaginal delivery nulliparas were retrospectively analyzed in Department of Obstetric and Gynecology, First Hospital of Peking University. Three groups were divided among all subjects: CSEA group (259 cases) receiving CSEA + PCEA, EA group (215 cases) receiving EA + PCEA and control group (248 cases) without any analgesia method.