[Optimizing the method for 31P-NMR analysis of organic phosphorus from wetland sediments].

Solution 31P-Nuclear Magnetic Resonance (NMR) is an analysis technology which has been an effective means for the analysis of environmental organic phosphorus. However, the method is rarely applied in the study of wetlands so that the corresponding researches about wetland sediment sample preparation method also very deficient. The present study was aimed to find the most suitable sample preparation method for 31P-NMR analysis of the artificial wetland sediments, using different extractant (NaOH or 0.

4-[(Z)-(n-Butyl-amino)(phenyl)methyl-idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

The title compound, C(21)H(23)N(3)O, exists in an enamine-keto form with the amino group involved in an intra-molecular N-H⋯O hydrogen bond. The dihedral angle between the phenyl rings is 73.59 (6)°.

An anatomic and clinical study of the adductor magnus tendon-descending genicular artery bone flap.

The composite tissue flap of the descending genicular vessels with the adductor magnus tendon is a newly developed, reliable method to repair the Achilles tendon and relevant skin defects. The aim of this study was to evaluate the anatomy of the adductor magnus tendon-descending genicular artery bone flap, and the feasibility and value for the repair of the Achilles tendon and relevant skin defects. There were 34 adult specimens used for the anatomy of this flap.

Reconstruction of soft tissue defect of the extremity with the perforator flap from inguinal region.

Background: The perforator flap has become a very useful reconstructive means of soft tissue defect of extremities. The perforator flap from the inguinal region has advantages that include the ability to cover a large area with little donor site morbidity and provision of suitable thickness for reconstruction.

Methods: From July 1, 2005 to June 30, 2007, 10 patients with various types of soft tissue defect underwent reconstruction with 10 perforator flaps from the inguinal region.

(E,E)-3,3'-Dimethyl-1,1'-diphenyl-4,4'-{(ethane-1,2-diyldiimino)-bis-[(2-fur-yl)methyl-idyne]}di-1H-pyrazol-5(4H)-one.

The complete molecule of the title compound of the title compound, C(32)H(28)N(6)O(4), is generated by crystallographic inversion symmetry. The dihedral angles between the pyrazalone ring and the pendant phenyl and furan rings are 15.65 (8) and 65.

Study on the anti-wear performance of Ni-base composite coating sucker joint that contains nano-diamond and nano-polytetrafluoroethylene.

With the development of oilfields, the problem of eccentric wear between casing and sucker rod in rod-pumped wells operation is more and more severe. Investigations on the eccentric wear show that the abrasion of sucker rod joint is more serious than the sucker rod itself. A new method of producing the Ni-base composite coating that contains nano-diamond and nano-polytetrafluoroethylene (PTFE) on sucker joint obtained by electrodeposition is presented in this paper.

Hydrogen bonding and pi-pi stacking in the three-dimensional supramolecular complex bis(4,4'-bipyridinium) diaquadioxalatoferrate(II) bis(hydrogen oxalate).

The title compound, (C(10)H(10)N(2))(2)[Fe(C(2)O(4))(2)(H(2)O)(2)](C(2)HO(4))(2), appears to be a modular associate consisting of a complex anion containing bivalent Fe as the central atom, a bridging hydrogen oxalate anion and a diprotonated 4,4-bipyridine acting as the counter-cation. The Fe(II) ion in the complex anion occupies a position on a centre of inversion. Its coordination environment is formed by six O atoms from two bidentate oxalate ligands, forming a basal plane, and two water molecules approximately perpendicular to the plane, representing a distorted octahedral geometry.