Hydrostatic

This article discusses possibilities of application of widely applied and promoted abroad methods of active dampening of vibration and pressure oscillations (antinoise technology) in order to reduce vibration transfer via vibro-insulating couplings (compensators) of fluid pipelines.

8p tohitohi 19-05-2020 15 0   Download

In order to study the pressure-induced changes of biological membrane, hydrostatic pressures of from 0.1 to 400 MPa were applied to membrane-bound Na + /K + -ATPase from pigkidneyas amodel systemof proteinand lipidmembrane. The activity showed at least a three-step change induced by pressures of 0.1±100 MPa, 100±220 MPa, and 220 MPa or higher.

9p research12 29-04-2013 25 2   Download

High hydrostatic pressure induced cold inactivation of carboxypeptidase Y. Carboxypeptidase Y was fully active when exposed to subzero temperature at 0.1 MPa; however, the enzyme became inactive when high hydrostatic pressure and subzero temperature were both applied. When the enzyme was treated at pressures higher than 300 MPa and temperatures lower than)5
C, it underwent an irreversible inactivation in which nearly 50% of the a-helical structure was lost as judged by circular dichroism spectral analysis....

9p research12 23-04-2013 41 4   Download

The effects of pressure on structure and activity of recom-binant human acetylcholinesterase (rHuAChE) were inves-tigatedup toapressureof 300 MPausinggel electrophoresis under elevated hydrostatic pressure, fluorescence of bound 8-anilinonaphthalene-1-sulfonate (ANS) and activity meas-urements followingexposure tohighpressure.

11p research12 23-04-2013 36 1   Download

The effects of hydrostatic pressure on yeast enolase have been studied in the presence of 1 mMMn2+ . When com-pared with apo-enolase, and Mg-enolase, the Mn-enzyme differs from the others in three ways. Exposure to hydro-static pressure does not inactivate the enzyme. If the experiments are performed in the presence of 1 mMMg2+ , or with apo-enzyme, the enzyme is inactivated [Kornblatt, M.J., Lange R., Balny C. (1998)Eur. J. Biochem251, 775– 780].

8p awards 05-04-2013 33 5   Download

The rate-limiting step for hydrolysis of thepositivelycharged oxoester benzoylcholine (BzCh) by human butyrylcho linesterase (BuChE) is deacylation (k3 ), whereas it is acyla-tion (k2 ) for hydrolysis of the homologous thioester ben-zoylthiocholine (BzSCh). Steady-state hydrolysis of BzCh and BzSCh by wild-type BuChEand its peripheral anionic site mutant D70G was investigated at different hydrostatic pressures, which allowed determination of volume changes associated with substrate binding, and the activation vol-umes for the chemical steps....

11p dell39 03-04-2013 32 4   Download

The effects of high hydrostatic pressure (HHP) and urea on conformational transitions of humana-thrombin structure were studiedbyfluorescence spectroscopy andbymeasuring the catalytic activity of the enzyme. Treatment of thrombin with urea produced a progressive red shift in the center of mass of the intrinsic fluorescence emission spectrum, with a maximum displacement of 650 cm )1 . HHP (270 MPa) shifted the centre ofmass by only 370 cm )1 .HHP combined with a subdenaturing urea concentration (1.5M) displaced the centre of mass by
750 cm )1 ....

8p dell39 03-04-2013 27 3   Download

Average depth model has a variety of applications in hydraulic engineering, especially in applications that flow depth is much smaller than the width of the flow. In this method the vertical variation is negligible and the hydraulic variables average integrated from channel bed to the surface free for the vertical axis. in equations arising management, pure hydrostatic pressure is assumed that not really valid in the case of flow in the bed is curved and can not be described curvature effects of the bed.

127p gauhaman123 17-11-2011 105 16   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học 'Respiratory Research cung cấp cho các bạn kiến thức về ngành y đề tài:" Cyclic hydrostatic pressure and cotton particles stimulate synthesis by human lung macrophages of cytokines in vitro...

11p toshiba12 20-10-2011 53 4   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học 'Respiratory Research cung cấp cho các bạn kiến thức về ngành y đề tài:" Cyclic hydrostatic pressure and cotton particles stimulate synthesis by human lung macrophages of cytokines in vitro...

14p toshiba12 20-10-2011 28 3   Download