Installations: Laundry and Dry Cleaning Operation Procedures

2002 ◽  
Author(s):  
DEPARTMENT OF THE ARMY WASHINGTON DC
Keyword(s):  
Cleaning Operation ◽  
Dry Cleaning

A procedure for cross-sectioning materials for TEM analysis without ion milling

1990 ◽  
Vol 48 (4) ◽  
pp. 742-743
Author(s):  
J.P. Benedict ◽  
Ron Anderson ◽  
S. J. Klepeis
Keyword(s):  
Surface Topography ◽  
Milling Time ◽  
Specimen Preparation ◽  
Ion Milling ◽  
Cleaning Operation ◽  
Tem Analysis ◽  
Platinum Silicide ◽  
Surface Alteration ◽  
Polishing Damage ◽  
Tools And Methods

Traditional specimen preparation procedures for non-biological samples, especially cross section preparation procedures, involves subjecting the specimen to ion milling for times ranging from minutes to tens of hours. Long ion milling time produces surface alteration, atomic number and rough-surface topography artifacts, and high temperatures. The introduction of new tools and methods in this laboratory improved our ability to mechanically thin specimens to a point where ion milling time was reduced to one to ten minutes. Very short ion milling times meant that ion milling was more of a cleaning operation than a thinning operation. The preferential thinning and the surface topography that still existed in briefly ion milled samples made the study of interfaces between materials such as platinum silicide and silicon difficult. These two problems can be eliminated by completely eliminating the ion milling step and mechanically polishing the sample to TEM transparency with the procedure outlined in this communication. Previous successful efforts leading to mechanically thinned specimens have shown that problems center on tool tilt control, removal of polishing damage, and specimen cleanliness.

363. Evaluating Passive Badge Samplers for Perchloroethylene Monitoring in Dry Cleaning Operations

2001 ◽  
Author(s):  
L. Taylor ◽  
G. Burroughs ◽  
D. Marlow ◽  
J. Deddens ◽  
L. Ewers ◽  
...  
Keyword(s):  
Dry Cleaning

EPA to regulate dry-cleaning solvent

2020 ◽  
Vol 98 (48) ◽  
pp. 21-21
Author(s):  
Britt E. Erickson
Keyword(s):  
Dry Cleaning

scholarly journals Electromagnetic Shielding Properties of Knitted Fabric Made from Polyamide Threads Coated with Silver

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1281
Author(s):  
Tanja Pušić ◽  
Bosiljka Šaravanja ◽  
Krešimir Malarić
Keyword(s):  
Composite Structures ◽  
Silver Coating ◽  
Cyclic Process ◽  
Knitted Fabric ◽  
Shielding Effectiveness ◽  
Dry Cleaning ◽  
Surface Mass ◽  
Degree Of Protection ◽  
Shielding Properties ◽  
The Stability

This paper investigates a textile material of low surface mass for its protection against electromagnetic radiation (EMR), which is suitable for composite structures of garments, and for technical and interior applications. The shielding effectiveness against EMR of fabric knitted from polyamide threads coated with silver, measured in the frequency range of 0.9 GHz to 2.4 GHz, indicated a high degree of protection. The key contribution of the paper is the evaluation of the stability of the shielding properties against EM radiation after applying apolar and polar solvents, in synergy with the cyclic process parameters of wet and dry cleaning. The results of the study confirmed the decline in the shielding effectiveness after successive cycles of material treatment with dry and wet cleaning. The effect of wet cleaning in relation to dry cleaning is more apparent, which is due to the damage of the silver coating on the polyamide threads in the knitted fabric.

Production-ready dry cleaning and deposition processes for low-temperature Si and SiGe epitaxy

2004 ◽  
Vol 224 (1-4) ◽  
pp. 36-40 ◽  
Author(s):  
H.M. Buschbeck ◽  
A. Erhart ◽  
Y. Goeggel ◽  
C. Rosenblad ◽  
S. Wiltsche ◽  
...  
Keyword(s):  
Low Temperature ◽  
Dry Cleaning ◽  
Deposition Processes

Study on Kidney Function in Female Workers Exposed to Perchlorethylene

1990 ◽  
Vol 9 (6) ◽  
pp. 377-380 ◽  
Author(s):  
A. Vyskočil ◽  
S. Emminger ◽  
J. Tejral ◽  
Z. Fiala ◽  
E. Ettlerova ◽  
...  
Keyword(s):  
Urinary Excretion ◽  
Biochemical Parameters ◽  
Renal Damage ◽  
Ambient Air ◽  
Exposed Group ◽  
Control Group ◽  
Total Proteins ◽  
Dry Cleaning ◽  
Female Workers ◽  
Occupationally Exposed

1 Biochemical markers of kidney damage were examined in 16 female workers chronically exposed to tetrachlorethylene (TCE) in five dry-cleaning shops. The results were compared with those obtained in 13 females non-occupationally exposed to organic solvents. 2 The intensity of exposure was monitored by personal environmental monitoring. The time-weighed average exposure to TCE amounted to 157 mg m-3 (range 9-799 mg m-3). A satisfactory agreement was found between the concentration of TCE in ambient air sampled with the charcoal tube method and with a passive dosimeter. 3 The urinary excretion of lysozyme was increased in the exposed group. No difference was found in the urinary excretion of albumin, β2-microglobulin, lactate dehydrogenase, total proteins or glucose. The prevalence of abnormal values of biochemical parameters in the exposed group did not differ from that observed in the control group. No correlation was found between the level of TCE exposure and biochemical parameters. 4 The present study suggests that chronic exposure to TCE does not lead to renal damage.

RESEARCH OF CYCLONE CHARACTERISTICS FOR DRY CLEANING OF GASES FROM DUST

2020 ◽  
Vol 5 (3) ◽  
pp. 49-61
Author(s):  
Andrii Cheilytko ◽  
◽  
Sergii Ilin
Keyword(s):  
Mathematical Model ◽  
Mass Transfer ◽  
Working Conditions ◽  
Ecological Condition ◽  
Air Purification ◽  
Dust Collection ◽  
Dry Cleaning ◽  
Harmful Emissions ◽  
Reduce Emissions ◽  
The Mathematical Model

The development and application of new, more efficient dust collection units that will help reduce emissions and conserve some very valuable resources for production is an important area of research. With the growth of innovation in technological enterprises, the number of harmful emissions into the atmosphere is growing. Thus, the ecological condition of the environment deteriorates. The basic analytical dependences which are necessary for construction of a technique of carrying out experiments and calculations of dust catching for concrete working conditions are developed. Methods of calculating cyclones as vortex devices and research of cyclone operation for air purification from dust were investigated. On the basis of the used basic theoretical positions of heat and mass transfer and thermodynamics at carrying out analytical researches the mathematical model was offered. Calculations of new designs of modern cyclones to obtain their geometric dimensions, resistance and dust capture efficiency were presented. Modern cyclones are designed to more effectively remove dust from the air during various types of work.

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