Simplified Wire-Screen Packing for Fractionating Columns

1949 ◽  
Vol 41 (5) ◽  
pp. 1056-1058 ◽  
Author(s):  
H J. John ◽  
C. E. Rehberg
Keyword(s):  
Wire Screen ◽  
Screen Packing

A freeze-fracture-etched study of the physarum polycephalum plasma membrane during early formation of the macroplasmodial stage

1993 ◽  
Vol 51 ◽  
pp. 346-347
Author(s):  
Randolph W. Taylor ◽  
Henrie Treadwell
Keyword(s):  
Plasma Membrane ◽  
Life Cycle ◽  
Growth Phase ◽  
Filter Paper ◽  
Physarum Polycephalum ◽  
Freeze Fracture ◽  
Petri Dish ◽  
Wire Screen ◽  
Wide Mouth ◽  
Sterile Filter

The plasma membrane of the Slime Mold, Physarum polycephalum, process unique morphological distinctions at different stages of the life cycle. Investigations of the plasma membrane of P. polycephalum, particularly, the arrangements of the intramembranous particles has provided useful information concerning possible changes occurring in higher organisms. In this report Freeze-fracture-etched techniques were used to investigate 3 hours post-fusion of the macroplasmodia stage of the P. polycephalum plasma membrane.Microplasmodia of Physarum polycephalum (M3C), axenically maintained, were collected in mid-expotential growth phase by centrifugation. Aliquots of microplasmodia were spread in 3 cm circles with a wide mouth pipette onto sterile filter paper which was supported on a wire screen contained in a petri dish. The cells were starved for 2 hrs at 24°C. After starvation, the cells were feed semidefined medium supplemented with hemin and incubated at 24°C. Three hours after incubation, samples were collected randomly from the petri plates, placed in plancettes and frozen with a propane-nitrogen jet freezer.

Letters to the Editor

PEDIATRICS ◽  
1959 ◽  
Vol 24 (5) ◽  
pp. 854-855
Author(s):  
DAVID W. ANDERSON ◽  
HARTLEY W. HOWARD
Keyword(s):  
Thyroid Activity ◽  
Letters To The Editor ◽  
Soybean Milk ◽  
Wire Screen ◽  
Normal Individuals ◽  
Thyroid Metabolism ◽  
Ad Libitum

Van Wyk et al. have reported a case of goiter and hypothyroidism in an infant maintained 8 months on a diet of soybean milk (Mull-Soy®). Their studies of this case and comparison with apparently normal individuals have led them to infer the presence in soy of a goitrogen which, in susceptible persons, modifies thyroid metabolism. We are studying the effect of soybean products on thyroid activity in rats and it seems desirable to present certain preliminary observations at this time. Rats, housed in individual wire-screen cages, were fed diets simulating soybean milk in composition and fortified with vitamins and iron to meet the known requirements. Water, ion-exchanged to remove traces of iodine, was provided ad libitum.

Numerical Investigation of Two-Phase Flow Over Unglazed Plate Collector Covered With Porous Material of Wire Screen for Solar Water Heater Application

2018 ◽  
Vol 141 (3) ◽  
Author(s):  
T. Salameh ◽  
Y. Zurigat ◽  
A. Badran ◽  
C. Ghenai ◽  
M. El Haj Assad ◽  
...  
Keyword(s):  
Surface Tension ◽  
Porous Material ◽  
Water Flow ◽  
Two Phase Flow ◽  
Volume Fraction ◽  
Phase Flow ◽  
Two Phase ◽  
Solar Water ◽  
Wire Screen ◽  
Effect Of Surface

This paper presents three-dimensional numerical simulation results of the effect of surface tension on two-phase flow over unglazed collector covered with a wire screen. The homogenous model is used to simulate the flow with and without the effect of porous material of wire screen and surface tension. The Eulerian-Eulerian multiphase flow approach was used in this study. The phases are completely stratified, the interphase is well defined (free surface flow), and interphase transfer rate is very large. The liquid–solid interface, gas–liquid interface, and the volume fraction for both phases were considered as boundaries for this model. The results show that the use of porous material of wire screen will reduce the velocity of water flow and help the water flow to distribute evenly over unglazed plate collector. The possibility of forming any hot spot region on the surface was reduced. The water velocity with the effect of surface tension was found higher than the one without this effect, due to the extra momentum source added by surface tension in longitudinal direction. The use of porous material of wires assures an evenly distribution flow velocity over the inclined plate, therefore helps a net enhancement of heat transfer mechanism for unglazed solar water collector application.

A numerical model of thermal analysis for woven wire screen matrix heat exchanger

Cryogenics ◽  
2009 ◽  
Vol 49 (9) ◽  
pp. 482-489 ◽  
Author(s):  
Chen Shuangtao ◽  
Hou Yu ◽  
Zhao Hongli ◽  
Xi Lan
Keyword(s):  
Thermal Analysis ◽  
Heat Exchanger ◽  
Numerical Model ◽  
Wire Screen ◽  
Matrix Heat Exchanger ◽  
Matrix Heat

Suppression of fugitive dust emitted from stone quarrying process using wetted wire screen

2012 ◽  
Vol 92 ◽  
pp. 17-20 ◽  
Author(s):  
Wiwut Tanthapanichakoon ◽  
Tawatchai Charinpanitkul
Keyword(s):  
Fugitive Dust ◽  
Wire Screen

Correction for nonlinearity of body flow plethysmograph

1981 ◽  
Vol 50 (3) ◽  
pp. 658-662 ◽  
Author(s):  
A. Harf ◽  
G. Atlan ◽  
H. Lorino ◽  
S. Deshayes ◽  
C. Morin ◽  
...  
Keyword(s):  
Vital Capacity ◽  
Normal Subjects ◽  
Forced Expiration ◽  
Wire Screen ◽  
Inertial Component ◽  
High Flows ◽  
Degree Equation ◽  
Drop Flow ◽  
Conventional Signal ◽  
Flow Element

A modification of conventional signal processing for the pressure-compensated flow plethysmograph is proposed to correct the nonlinearity of the flow element that appears for high flows as encountered during forced expiration. Woven screens behave as porous media with a viscous and an inertial component in the resistance; this explains the nonlinearity (23% at 15.1.s-1 with a 400-mesh wire screen area = 50 cm2). It was shown that the pressure drop-flow relationship can be described by a second-degree equation, which can be included in the computation of the thoracic signal from the box pressure. The need for such a correction is evidenced by testing the plethysmograph with a flow step input (0-15 l.s-1) equivalent both in amplitude and in frequency to the thoracic flow during a forced expiration. Such correction for nonlinearity avoids an overestimation of the thoracic forced vital capacity of up to 0.5 liter in normal subjects.

scholarly journals Performance Analysis of Woven Wire Screen Matrix Heat Exchanger Units

2011 ◽  
Vol 6 (1) ◽  
pp. 192-202 ◽  
Author(s):  
Hongli ZHAO ◽  
Yu HOU ◽  
Xuemei SU ◽  
Qiaoyu ZHANG
Keyword(s):  
Heat Exchanger ◽  
Performance Analysis ◽  
Wire Screen ◽  
Matrix Heat Exchanger ◽  
Matrix Heat
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