Measurements of Chrysotile Fiber Retention Efficiencies for Polycarbonate and Mixed Cellulose Ester Filters

2009 ◽  
pp. 250-250-16
Author(s):  
Eric J. Chatfield
Keyword(s):  
Cellulose Ester

Electron Microscopic Characterization and Quantitation of Air Borne Particulate Matter with Special Emphasis on Asbestos

1972 ◽  
Vol 30 ◽  
pp. 356-357
Author(s):  
Peter K. Mueller ◽  
Glenn R. Smith ◽  
Leslie M Carpenter ◽  
Ronald L. Stanley
Keyword(s):  
Electron Microscopy ◽  
Light And Electron Microscopy ◽  
Ambient Air ◽  
Quality Standard ◽  
Primary Objective ◽  
Cellulose Ester ◽  
Main Concept ◽  
Electron Microscopic ◽  
Air Samples ◽  
Diffraction Patterns

At the present time the primary objective of the electron microscopy group of the Air and Industrial Hygiene Laboratory is the development of a method suitable for use in establishing an air quality standard for asbestos in ambient air and for use in its surveillance. The main concept and thrust of our approach for the development of this method is to obtain a true picture of fiber occurrence as a function of particle size and asbestos type utilizing light and electron microscopy.We have now available an electron micrographic atlas of all asbestos types including selected area diffraction patterns and examples of fibers isolated from air samples. Several alternative approaches for measuring asbestos in ambient air have been developed and/or evaluated. Our experiences in this regard will be described. The most promising method involves: 1) taking air samples on cellulose ester membrane filters with a nominal pore size of 0.8 micron; 2) ashing in a low temperature oxygen plasma for several hours;

Preparation and characterization of arabinoxylan esters and arabinoxylan ester/cellulose ester polymer blends

2003 ◽  
Vol 52 (4) ◽  
pp. 345-357 ◽  
Author(s):  
Charles M Buchanan ◽  
Norma L Buchanan ◽  
John S Debenham ◽  
Paul Gatenholm ◽  
Maria Jacobsson ◽  
...  
Keyword(s):  
Polymer Blends ◽  
Cellulose Ester

Comparative study of membrane filtration and enrichment media for the isolation and enumeration of Pseudomonas aeruginosa from sewage, surface water, and swimming pools

1985 ◽  
Vol 31 (8) ◽  
pp. 686-692 ◽  
Author(s):  
A. H. Havelaar ◽  
M. During ◽  
E. H. M. Delfgou-Van Asch
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Membrane Filtration ◽  
Culture Media ◽  
Polluted Water ◽  
Most Probable Number ◽  
Cellulose Ester ◽  
Swimming Pools ◽  
Probable Number ◽  
Membrane Filters ◽  
Swimming Water

The recovery of Pseudomonas aeruginosa on several selective culture media was tested using raw sewage and secondary sewage effluent samples as well as spiked chlorinated imitation swimming water and samples from whirlpools. mPA-medium B gave good recovery of both vital and chlorine-injured P. aeruginosa and selectivity was greater than 90% when analysing whirlpool samples. It is therefore the medium recommended for examination of chlorinated swimming pools. When analysing sewage polluted water with the mPA-B medium, reduced selectivity was noted from low verification rates and from overgrowth by competitive flora. A modified medium (mPA-D; addition of cetrimide, omission of sulphapyridine and actidione) was more selective and sufficiently recovered noninjured cells. Chlorine-injured cells were completely inhibited, however. C-390 (9-chloro-9-(4-diethylaminophenyl)-10-phenylacridan) was confirmed to be highly selective for P. aeruginosa when used in spread plates at a concentration of 30 μg/mL; P. aeruginosa was slightly inhibited. However, the medium could not be used with conventional membrane filtration techniques, because cellulose ester filters interfered with the selective action of C-390. Selectivity could be improved by using Gelman Tuffryn (polysulphone) filters and increasing the C-390 concentration to 120 μg/mL. At this concentration, however, the medium was strongly inhibitory to P. aeruginosa; resuscitation only partially improved recovery. Two other membrane filtration media were tested. Both cetrimide – nalidixic acid agar and Drake's medium No. 19 were inhibitory to chlorine-injured cells. Several types of membrane filters were tested and there was little difference between them. In the most-probable-number technique, recovery of P. aeruginosa was shown to be excellent when using asparagine broth. Malachite green broth was strongly inhibitory to chlorine-injured P. aeruginosa.

Weather Resistance of Cellulose Ester Plastic Compositions.

1945 ◽  
Vol 37 (3) ◽  
pp. 232-239 ◽  
Author(s):  
L. W. A. Meyer ◽  
W. M. Gearhart
Keyword(s):  
Cellulose Ester ◽  
Weather Resistance

Concentration of Enteric Viruses in Large Volumes of Water Using a Cartridge-Type Mixed Cellulose Ester Membrane

2014 ◽  
Vol 7 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Akihiko Hata ◽  
Katsuhito Matsumori ◽  
Masaaki Kitajima ◽  
Hiroyuki Katayama
Keyword(s):  
Enteric Viruses ◽  
Cellulose Ester

Papierchromatographische Trennung hydrophober Substanzen mit Cellulose-Ester-Papieren. Ein neues Verfahren zur Peptid-Synthese (Oxazolidonverfahren)

1963 ◽  
Author(s):  
Fritz Micheel ◽  
Helmut Schweppe ◽  
Paul Albers ◽  
Wolfgang Schminke ◽  
Wilhelm Leifels ◽  
...  
Keyword(s):  
Cellulose Ester

Stability of Cellulose Ester Base Photographic Film: Part I — Laboratory Testing Procedures

SMPTE Journal ◽  
1992 ◽  
Vol 101 (5) ◽  
pp. 336-346 ◽  
Author(s):  
P. Z. Adelstein ◽  
J. M. Reilly ◽  
D. W. Nishimura ◽  
C. J. Erbland
Keyword(s):  
Laboratory Testing ◽  
Photographic Film ◽  
Cellulose Ester ◽  
Testing Procedures ◽  
Ester Base

Application of Chemical and Thermal Analysis Methods for Studying Cellulose Ester Plastics

2010 ◽  
Vol 43 (6) ◽  
pp. 888-896 ◽  
Author(s):  
Michael Schilling ◽  
Michel Bouchard ◽  
Herant Khanjian ◽  
Tom Learner ◽  
Alan Phenix ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Cellulose Ester ◽  
Analysis Methods
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