Effect of Surface Active Agents on the Stability of Falling Liquid Films

1964 ◽  
Vol 3 (2) ◽  
pp. 132-142 ◽  
Author(s):  
Stephen Whitaker
Keyword(s):  
Liquid Films ◽  
Surface Active Agents ◽  
Surface Active ◽  
The Stability ◽  
Falling Liquid Films ◽  
Effect Of Surface

Wind-generated waves in thin liquid films with soluble contaminant

1971 ◽  
Vol 45 (3) ◽  
pp. 527-544 ◽  
Author(s):  
F. I. P. Smith ◽  
Alex D. D. Craik
Keyword(s):  
Surface Active Agent ◽  
Active Agent ◽  
Theoretical Work ◽  
Liquid Films ◽  
Stream Flows ◽  
Surface Active Agents ◽  
Air Stream ◽  
Surface Active ◽  
The Stability

Craik (1968) has previously examined the stability of horizontal liquid films when an air stream flows over the liquid surface and when the surface is contaminated by an insoluble surface-active agent. The present theoretical work extends this investigation to examine the role of soluble surface-active agents for cases where the liquid Reynolds number is small. This role is found to be a rather complex one which, under suitable conditions, may be either stabilizing or destabilizing.Related experimental work is described which yields results in qualitative agreement with the theoretical analysis.

Entrainment of liquid films by vertically moving thin rods

1975 ◽  
Vol 28 (3) ◽  
pp. 461 ◽  
Author(s):  
SK Nicol ◽  
GR Wilson
Keyword(s):  
Film Thickness ◽  
Short Review ◽  
Liquid Films ◽  
Model Systems ◽  
Glycerol Solution ◽  
Film Drainage ◽  
Air Interface ◽  
Surface Active Agents ◽  
Surface Active ◽  
Effect Of Surface

When a thin rod is withdrawn vertically from a liquid bath a film of that liquid adheres to the rod. A short review of the theories describing this process is given. The application of these theories to three model systems using glycerol solution, kerosene and an oil as the coating liquids is discussed. The effect of surface active agents on the equilibrium film thickness is explained in terms of additional forces at the liquid-air interface impeding film drainage.

Effect of surface active agents on the production of biopesticides using wastewater sludge as a raw material

2001 ◽  
Vol 44 (10) ◽  
pp. 253-259 ◽  
Author(s):  
A.S. Vidyarthi ◽  
R.D. Tyagi ◽  
J.R. Valéro
Keyword(s):  
Bacillus Thuringiensis ◽  
Shake Flask ◽  
Spruce Budworm ◽  
Tween 80 ◽  
Wastewater Sludge ◽  
Raw Material ◽  
Viable Cells ◽  
Surface Active Agents ◽  
Surface Active ◽  
Effect Of Surface

Effect of surface active agents on the production of Bacillus thuringiensis based biopesticides using secondary wastewater sludge as a raw material was studied. The experiments were conducted in a shake flask and nine different commercial surface active agents were used at a concentration of 0.2% (v/v). The sludge samples after addition of surface active agents were sterilised at 121°C for 30 min. The progress of biopesticide production was monitored by measuring viable cells and viable spores counts. The entomotoxicity was determined through bioassay against 3rd instar larvae of spruce budworm. ATPLUS 522, Tween 80 and Tween 85 increased the entomotoxicity potential in comparison to the control. The highest increase of 24% in entomotoxicity was observed when sludge was fortified with Tween 80.

scholarly journals Effect of Surface Active Agents on Chick Growth

1952 ◽  
Vol 31 (4) ◽  
pp. 746-747 ◽  
Author(s):  
H.M. Scott ◽  
B.C. Johnson ◽  
E.A. Goffi
Keyword(s):  
Chick Growth ◽  
Surface Active Agents ◽  
Surface Active ◽  
Effect Of Surface
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