Results 251 to 260 of about 3,583,341 (309)

Loss of Bacterial Motility under Pressure

Nature, 1973
BACTERIAL motility is thought to be ecologically important, especially in environments containing inadequate nutrients. Many bacteria have highly specialised tactic systems that allow them to detect physical or chemical gradients and to swim either to or away from the source. Motility and chemotaxis seem to be important also in bacterial film formation
R, Meganathan, R E, Marquis
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Pressure-dependent neuroretinal rim loss in normal-pressure glaucoma

American Journal of Ophthalmology, 1998
To evaluate whether, in normal-pressure glaucoma, the level of intraocular pressure is correlated with the degree of glaucomatous optic nerve damage.Color stereo optic disk photographs of 98 eyes with the focal type of normal-pressure glaucoma, 17 eyes with the highly myopic type of normal-pressure glaucoma, and 36 eyes with the age-related atrophic ...
J B, Jonas, A E, Gründler, J, Gonzales-Cortés   +2 more
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Pressure Loss Modeling

2019
This chapter gives an introduction to the Bernoulli equation and the different correlations to calculate the friction pressure loss coefficient for single- and two-phase flow (evaporation and condensation). Detailed descriptions of the physical equations for pressure loss components are provided (lumped straight pipe, pipe pressure loss, singular ...
Baligh El Hefni, Daniel Bouskela
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Pressure Losses in Flexible Ducts

American Industrial Hygiene Association Journal, 1971
A brief study of pressure loss in flexible ducts was undertaken to provide a suitable basis for judging the adequacy of presently published data provided by the duct manufacturers, and to evaluate the need for further research on the subject. For the 2 1/2-, 4-, and 6-inch-diameter brand A ducts tested, losses measured in the laboratory in perfectly ...
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Pressure loss in constriction microchannels

Journal of Microelectromechanical Systems, 2002
Constriction devices contain elements inserted into the fluid stream, which change the local streamwise flow area. One such element is the orifice-like obstruction with sharp corners, a back-to-back abrupt contraction and expansion, which could trigger flow separation.
Lee, WY, Wong, M., Zohar, Y.
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Reducing avoidable pressure losses

World Pumps, 2011
Industrial plants frequently employ oversized pumps out of caution. Pressure losses, and consequently energy consumption, may thus be unnecessarily high. Dr Walter Schicketanz explains in detail how such avoidable pressure drops can be determined both theoretically and in the field, as well as examining how to reduce them.
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Tire Pressure Loss and Intracarcass Pressure Modeling

Tire Science and Technology, 1992
Abstract The inflation pressure loss and carcass pressure build‐up (intracarcass pressure or ICP) of tubeless tires can be predicted with a simple theoretical model. Tire construction and relative air permeabilities of the main tire components are significant factors in the pressure loss and ICP.
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Pressure Losses in Customer's Services

Journal AWWA, 1932
During the past year more attention has been given the matter of pressure losses in customer's services by the Indianapolis Water Company than in the preceding years. Local progress and developments account for this increased consideration. With the completion of a city wide meterization program at the end of 1931 the natural tendency is to lend as ...
H. W. Niemeyer, J. A. Bruhn
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Calculation of pressure losses during pneumatic transport

NOVYE OGNEUPORY (NEW REFRACTORIES), 2020
A method for calculating pressure losses during pneumatic transport is considered with the aim of choosing the most favorable operating mode, which allows to reduce the consumption of compressed air. It has been established that the generally accepted formulas for calculating pressure losses along the path, calculated as the sum of the pressure losses ...
S. F. Shishkin, A. S. Shishkin, V. B. Ponomarev   +2 more
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Pressure Losses in Rectangular Elbows

Journal of Fluids Engineering, 1936
Abstract The authors present data on pressure losses in rectangular elbows as affected by (a) the radius ratios of the elbows, (b) the aspect ratios of the elbows, (c) angle of the bend, (d) the elbow size, (e) velocity of flow, (f) splitters in the elbows, and (g) compound elbows. In general, data are given (1) for the elbow situated in
R. D. Madison, J. R. Parker
openaire   +1 more source