Diaqua­bis(2-chloro­benzoato-κO)bis­(N,N-diethyl­nicotinamide-κN 1)manganese(II)

In the monomeric title complex, [Mn(C7H4ClO2)2(C10H14N2O)2(H2O)2], the MnII atom is located on a crystallographic centre of inversion. The asymmetric unit contains one 2-chloro­benzoate (CB) ligand, one diethyl­nicotinamide (DENA) ligand and one coordinated water mol­ecule, all ligands being monodentate. The four O atoms in the equatorial plane around the Mn atom form a slightly distorted square-planar arrangement, while the slightly distorted octa­hedral coordination is completed by the two pyridine N atoms of the DENA ligands in the axial positions. The dihedral angle between the carboxyl group and the adjacent benzene ring is 77.9 (11)°, while the pyridine and benzene rings are oriented at a dihedral angle of 45.94 (5)°. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into infinite chains

Managed Pressure Drilling Techniques, Equipments, and Applications

In most of the drilling operations it is obvious that a considerable amount of money is spent for drilling related problems, including stuck pipe, lost circulation, and excessive mud cost. In order to decrease the percentage of non-productive time caused by these kind of problems, the aim is to control annular frictional pressure losses especially in the fields where pore pressure and fracture pressure gradient is too close, which is called narrow drilling window If we can solve these problems, the budget spent for drilling the wells will fall, therefore, enabling the industry to be able to drill wells that were previously uneconomical. Managed pressure drilling is a new technology that allows us to overcome these kinds of drilling problems by controlling the annular frictional pressure losses. As the industry remains relatively unaware of the full spectrum of benefits, this thesis involves the techniques used in managed pressure drilling with an emphasis upon revealing several of its lesser known and, therefore, less appreciated applications

EPHEDRINE ENHANCES ANALGESIC EFFECT OF MORPHINE

Morphine-ephedrine interaction on analgesia was studied in mice (n = 240) and in post-operative patients (n = 32). It was found that combining morphine and ephedrine enhances analgesia which is not significantly different from the effect of morphine given alone at double dose

Leisure constraints and leisure satisfaction in the recreational activities of employees with disabilities

This study analysed leisure constraints and leisure satisfaction in the recreational activities of employees with disabilities. The sample (N=123) consisted of 91 men and 32 women with disabilities working in public institutions in Antalya, Turkey. Leisure constraints were measured using the Leisure Constraints Questionnaire developed by Alexandris and Carroll, and leisure satisfaction was measured using the Leisure Satisfaction Scale developed by Beard and Ragheb. The leisure constraints and leisure satisfaction of the respondents were compared according to gender, age and frequency of leisure participation, using the Mann-Whitney U-test. The results indicated no significant differences in mean scores for leisure constraints for either gender or age, although scores on the subscale for ‘individual/ psychological factors’ revealed significant differences in the frequency of leisure participation. The Leisure Satisfaction Scale revealed significant gender differences on the social subscale, as well as age-related differences on the psychological subscale. The mean scores for individual/psychological constraints were higher for respondents who participated in leisure activities one day a week than for those who participated more days per week. To increase the participation in leisure activities and to enhance the satisfaction derived from participation, the planning and arrangement of recreational services should be designed specifically for employees with disabilities.Key words: Leisure; Recreation; Constraints; Satisfaction; Employees with disabilities

Mechanical properties of composite plates produced from 1x1 rib knit fabrics with carbon fibers

Center for Advanced Engineering Fibers and Films (CAEFF);Hohenstein Institute;Johnson and Johnson;National Science Foundation (NSF)International Symposium on New Frontiers in Fiber Materials Science 2011 -- 11 October 2011 through 13 October 2011 -- -- 121317[No abstract available

A Study of nozzle angle in stone surface treatment with water jets

The stone surface treatment with water jet is a recently introduced method. It is used to increase the roughness to improve its antislip properties while preserving esthetic appearance of the stone without having thermal shock, mechanical stress and the production of fumes and dust. Nozzle angle is one of the important parameters affecting treatment of surface. This study is an attempt to assess the effect of nozzle angle on surface treatment quality with water jet and to determine the most suitable nozzle angle value. For this purpose, surfaces of Sardinian Basalt samples are treated with pure water jet in six different nozzle angles (15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees and 90 degrees). The roughness is measured on all the treated surfaces by various roughness parameters. The experimental studies showed that treatment with nozzle angle between 30 degrees and 75 degrees gives the surfaces with similar regular variation