A Cellulose Sponge Sampling Technique for Surfaces

1975 ◽  
Vol 38 (9) ◽  
pp. 504-504 ◽  
Author(s):  
J. H. SILLIKER ◽  
D. A. GABIS
Keyword(s):  
Sampling Technique ◽  
Surface Sampling ◽  
Cellulose Sponge

An improved surface sampling technique using cellulose sponges is described. The technique has been found particularly effective for detection of Salmonella on surfaces but can also be used in place of the contact swab method for detection of other microorganisms on surfaces.

scholarly journals Alternative fast analysis method for cellulose sponge surface sampling wipes with low concentrations of Bacillus Spores

2019 ◽  
Vol 156 ◽  
pp. 5-8 ◽  
Author(s):  
Ahmed Abdel-Hady ◽  
M. Worth Calfee ◽  
Denise Aslett ◽  
Sang Don Lee ◽  
Barbara Wyrzykowska-Ceradini ◽  
...  
Keyword(s):  
Analysis Method ◽  
Surface Sampling ◽  
Fast Analysis ◽  
Cellulose Sponge ◽  
Low Concentrations ◽  
Bacillus Spores

scholarly journals A dual-tube sampling technique for snowpack studies

2021 ◽  
Author(s):  
Remi Dallmayr ◽  
Johannes Freitag ◽  
Maria Hörhold ◽  
Thomas Laepple ◽  
Johannes Lemburg ◽  
...  
Keyword(s):  
High Efficiency ◽  
Signal To Noise Ratio ◽  
Spatial Scales ◽  
Sampling Technique ◽  
Depth Resolution ◽  
Core Sample ◽  
Surface Sampling ◽  
Snow Properties ◽  
Spatial Noise ◽  
Level Of Understanding

<p>The validity of any glaciological paleo proxy used to interpret climate records is based on the level of understanding of their transfer from the atmosphere into the ice sheet and their recording in the snowpack. Large spatial noise in snow properties is observed, as the wind constantly redistributes the deposited snow at the surface routed by the local topography. To increase the signal-to-noise ratio and getting a representative estimate of snow properties with respect to the high spatial variability, a large number of snow profiles is needed. However, the classical way of obtaining profiles via snow-pits is time and energy-consuming, and thus unfavourable for large surface sampling programs. In response, we present a dual-tube technique to sample the upper metre of the snowpack at a variable depth resolution with high efficiency. The developed device is robust and avoids contact with the samples by exhibiting two tubes attached alongside each other in order to (1) contain the snow core sample and (2) to access the bottom of the sample, respectively. We demonstrate the performance of the technique through two case studies in East Antarctica where we analysed the variability of water isotopes at a 100 m and 5 km spatial scales.</p>

scholarly journals Air sampling of smallpox virus

1974 ◽  
Vol 73 (1) ◽  
pp. 1-8 ◽  
Author(s):  
G. Thomas
Keyword(s):  
Air Sampling ◽  
Sampling Technique ◽  
Surface Sampling ◽  
Smallpox Virus ◽  
Future Design ◽  
Adhesive Surface ◽  
Successful Recovery ◽  
The Future

SUMMARYAirborne smallpox virus has been recovered in an isolation hospital using an adhesive surface sampling technique in the presence of very low aerosol concentrations. Previous work in this field is reviewed. Successful recovery of airborne virus depends on sampling large volumes of air with a suitable sampler and thorough investigation of the whole sample taken for the presence of viable virus. More information on the characteristics and behaviour of airborne smallpox virus is needed in particular with regard to the future design and siting of smallpox isolation units.

Objective Color Scale for the SWYPE Surface Sampling Technique Using Computerized Image Analysis Tools

2009 ◽  
Vol 6 (10) ◽  
pp. 604-611 ◽  
Author(s):  
Diana M. Ceballos ◽  
Michael G. Yost ◽  
Stephen G. Whittaker ◽  
Janice Camp ◽  
Russell Dills
Keyword(s):  
Image Analysis ◽  
Sampling Technique ◽  
Surface Sampling ◽  
Computerized Image Analysis ◽  
Color Scale ◽  
Analysis Tools

scholarly journals Applications of a Turf Surrogate Surface Sampling Technique in Measuring Mercury Dry Deposition in Florida, USA

2013 ◽  
Vol 1 ◽  
pp. 03008
Author(s):  
N. L. Hall ◽  
J. T. Dvonch ◽  
J. A. Barres ◽  
F. M. Marsik ◽  
G. J. Keeler
Keyword(s):  
Dry Deposition ◽  
Sampling Technique ◽  
Surface Sampling ◽  
Surrogate Surface

scholarly journals An adhesive surface sampling technique for airborne viruses

1970 ◽  
Vol 68 (2) ◽  
pp. 273-282 ◽  
Author(s):  
G. Thomas
Keyword(s):  
Bovine Serum Albumin ◽  
Collection Efficiency ◽  
Sampling Technique ◽  
Petri Dish ◽  
Surface Sampling ◽  
Particle Collection ◽  
Adhesive Surface ◽  
Airborne Viruses ◽  
Andersen Sampler ◽  
Number Of Particles

SUMMARYA mixture of sucrose, glycerol and bovine serum albumin produces a stable coating in a Petri dish which remains adhesive for up to an hour when exposed in a slit sampler. Virus aerosols can be collected on this surface followed the direct addition of cell cultures to demonstrate the presence of viable virus. The technique is applicable to the Andersen sampler. A modified version of this sampler has been produced with the same particle collection efficiency as the standard Andersen sampler. The plaque counts obtained the adhesive surface sampling technique are believed to give an indication of the number of particles collected bearing viable virus.

scholarly journals Direct Analysis of Pharmaceutical Drugs Using Nano-DESI MS

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Carlos Cardoso-Palacios ◽  
Ingela Lanekoff
Keyword(s):  
Principal Component ◽  
Sample Pretreatment ◽  
Sampling Technique ◽  
Direct Analysis ◽  
Forensic Analysis ◽  
Ionization Mass ◽  
Pharmaceutical Drugs ◽  
Global Public Health ◽  
Surface Sampling ◽  
Desi Ms

Counterfeit pharmaceutical drugs imply an increasing threat to the global public health. It is necessary to have systems to control the products that reach the market and to detect falsified medicines. In this work, molecules in several pharmaceutical tablets were directly analyzed using nanospray desorption electrospray ionization mass spectrometry (nano-DESI MS). Nano-DESI is an ambient surface sampling technique which enables sampling of molecules directly from the surface of the tablets without any sample pretreatment. Both the active pharmaceutical ingredients (APIs) and some excipients were detected in all analyzed tablets. Principal component analysis was used to analyze mass spectral features from different tablets showing strong clustering between tablets with different APIs. The obtained results suggest nano-DESI MS as future tool for forensic analysis to discern APIs present in unknown tablet samples.

scholarly journals A dual-tube sampling technique for snowpack studies

2020 ◽  
pp. 1-7
Author(s):  
Remi Dallmayr ◽  
Johannes Freitag ◽  
Maria Hörhold ◽  
Thomas Laepple ◽  
Johannes Lemburg ◽  
...  
Keyword(s):  
High Efficiency ◽  
Signal To Noise Ratio ◽  
Spatial Scales ◽  
Sampling Technique ◽  
Depth Resolution ◽  
Core Sample ◽  
Surface Sampling ◽  
Snow Properties ◽  
Spatial Noise ◽  
Level Of Understanding

Abstract The validity of any glaciological paleo proxy used to interpret climate records is based on the level of understanding of their transfer from the atmosphere into the ice sheet and their recording in the snowpack. Large spatial noise in snow properties is observed, as the wind constantly redistributes the deposited snow at the surface routed by the local topography. To increase the signal-to-noise ratio and getting a representative estimate of snow properties with respect to the high spatial variability, a large number of snow profiles is needed. However, the classical way of obtaining profiles via snow-pits is time and energy-consuming, and thus unfavourable for large surface sampling programs. In response, we present a dual-tube technique to sample the upper metre of the snowpack at a variable depth resolution with high efficiency. The developed device is robust and avoids contact with the samples by exhibiting two tubes attached alongside each other in order to (1) contain the snow core sample and (2) to access the bottom of the sample, respectively. We demonstrate the performance of the technique through two case studies in East Antarctica where we analysed the variability of water isotopes at a 100 m and 5 km spatial scales.

scholarly journals Sampling rabbit pox aerosols of natural origin

1970 ◽  
Vol 68 (4) ◽  
pp. 511-517 ◽  
Author(s):  
G. Thomas
Keyword(s):  
Cell Suspension ◽  
Sampling Technique ◽  
Surface Sampling ◽  
Natural Origin ◽  
Direct Addition ◽  
Adhesive Surface ◽  
A Cell ◽  
Natural Aerosols ◽  
Andersen Sampler

SUMMARYNatural aerosols of rabbit pox virus produced by groups of infected rabbits were sampled with a slit and Andersen sampler using an adhesive surface sampling technique (Thomas, 1970). The higher rate of successful recoveries of airborne virus compared with a previous report is believed to be due to the much larger volume of air sampled by this technique and to the processing of the whole of the sample collected by the direct addition of a cell suspension to demonstrate the presence of viable virus.

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