Environmental Factors Affecting Drying Time on Plastic and Potential Issues Associated with Efficacy Testing of Antimicrobial Surfaces. Presentation by James Redfern
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Analysis of Volatile Organic Compounds (VOCs) in Air Using U.S. EPA Method TO-17PerkinElmer, Inc.
EPA Method TO-17 is used to determine toxic compounds in air after they have been collected onto sorbent tubes. These tubes can either adsorb specific compounds or adsorb a broad range of compounds, quantitatively. Adsorbent tubes have many applications in the investigation of volatile organic compounds (VOCs) found in EPA Method TO-17. Examples include indoor air, fence line, stack, workplace, personal monitoring and soil gas. The type of tube used, and whether the sampling is passive or active, depends upon the need at the particular site being investigated. This application note demonstrates that the PerkinElmer TurboMatrix™ Thermal Desorber and the PerkinElmer Clarus® SQ 8 GC/MS will meet and exceed the criteria set forth in EPA method TO-17. Detailed instrument method parameters are presented, with precision, recovery, linearity and detection limit results.
Here is the presentation about my final year project. I, intentionally, did not put every information on the slide because I decided to mention it on my presentation speech. That's one of my way to keep the audience with me.
This report examines different things in admixtures (super plasticizers) such as solid content, rheological properties and chloride content. Different test were conducted to determine the above properties.
Proposal Procedure toDesign AnOptimum Ventilation System For Chemical LaboratoryIJRESJOURNAL
ABSTRACT:This paper aims to provide a proposal for design of an optimum ventilation system for: Good and safe environment,Comfortable workplace for laboratories occupants and Ensure the health of the surrounding environment while minimizing the energy consumption. Concentration level of materials in laboratory is analyzed in correlation with air exchange rate, toxicity and area of laboratory.
AIR POLLUTION CONTROL course material by Prof S S JAHAGIRDAR,NKOCET,SOLAPUR for BE (CIVIL ) students of Solapur university. Content will be also useful for SHIVAJI and PUNE university students
Analysis of Volatile Organic Compounds (VOCs) in Air Using U.S. EPA Method TO-17PerkinElmer, Inc.
EPA Method TO-17 is used to determine toxic compounds in air after they have been collected onto sorbent tubes. These tubes can either adsorb specific compounds or adsorb a broad range of compounds, quantitatively. Adsorbent tubes have many applications in the investigation of volatile organic compounds (VOCs) found in EPA Method TO-17. Examples include indoor air, fence line, stack, workplace, personal monitoring and soil gas. The type of tube used, and whether the sampling is passive or active, depends upon the need at the particular site being investigated. This application note demonstrates that the PerkinElmer TurboMatrix™ Thermal Desorber and the PerkinElmer Clarus® SQ 8 GC/MS will meet and exceed the criteria set forth in EPA method TO-17. Detailed instrument method parameters are presented, with precision, recovery, linearity and detection limit results.
Here is the presentation about my final year project. I, intentionally, did not put every information on the slide because I decided to mention it on my presentation speech. That's one of my way to keep the audience with me.
This report examines different things in admixtures (super plasticizers) such as solid content, rheological properties and chloride content. Different test were conducted to determine the above properties.
Similar to Environmental Factors Affecting Drying Time on Plastic and Potential Issues Associated with Efficacy Testing of Antimicrobial Surfaces. Presentation by James Redfern
Proposal Procedure toDesign AnOptimum Ventilation System For Chemical LaboratoryIJRESJOURNAL
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Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
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3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
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1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
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Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
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www.agostodourado.com
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Environmental Factors Affecting Drying Time on Plastic and Potential Issues Associated with Efficacy Testing of Antimicrobial Surfaces. Presentation by James Redfern
1. Environmental Factors Affecting Drying
Time on Plastic and Potential Issues
Associated with Efficacy Testing of
Antimicrobial Surfaces
Methods Protoc. 2018, 1(4), 36; https://doi.org/10.3390/mps1040036
James Redfern, J.Redfern@mmu.ac.uk
Postdoctoral Research Associate,
Manchester Metropolitan University, UK
2. Scenario
Current test methods include JIS Z 2801 and BS ISO 22196:2011
• “Temperature of (35 ± 1) C and a relative humidity of not less than 90 % for
(24 ± 1) h.”
• Hospital wards are often between 30 H%-60RH%, 18C - 28C and with an
airflow of not more than 2m/s at a vent face (UK, Dept for Health, 2007)
• Other test methods have been developed that change the temperature and RH
to replicate the hospital environment.
Department of Health (2007). HTM 03-01: Specialised Ventilation for Healthcare Premises: Part A - Design and Validation. E. a. F. Division. Leeds, UK,
Department of Health.
3. Scenario
However,
Test chamber = 50%RH and 20C & 10ul inoculum = x drying time
Hospital room = 50%RH and 20C & 10ul inoculum = y drying time
Are the drying times the same??
4. Question
What is the variation of drying time within a test chamber
considering these environmental variables?
• Temperature
• Relative humidity
• Air flow
5. STSM
Saturated salts
Time taken for RH % to reach target of 43% (indicated by solid vertical line). Each
condition contained 75 g of potassium carbonate (K2CO3) mixed with 50 g of water (to
create a slurry) and evenly spread over either 64 cm2(condition 1), 128 cm2(condition 2),
192 cm2 (condition 3) or 256 cm2 (condition 4). Data points are every five minutes. Each
condition was repeated three times.
6. STSM
Saturated salts
Time taken for RH% to revert from the RH % achieved using potassium carbonate
(K2CO3) to the initial RH % after taking the lid off the glass chamber after condition 4
experiments. Data points are pooled from three repeats and error bars (where visible)
represent standard deviation.
7. STSM
Saturated salts
• In a test chamber, the surface area upon which the saturated salts
are spread is an important factor in the time taken for a RH%
target to be achieved
• If the lid of a test chamber is opened (for example to remove a
sample), the RH% is revert back to that of the local environment
very quickly
• If multiple samples in one chamber, they will receive varying
levels of RH% across an experiment
10. IBRG
Drying time on plastic
• Samples of 2, 5 or 10 μl dried significantly (p<0.05) slower at a
temperature closer to hospital ward (20-22.9C)
• The absence of any airflow significantly (p<0.05) increased the
drying time across all volumes
• Higher RH% takes longer to dry
11. Specific examples
Volume
(ul)
Temp
(C)
RH% Drying
Time (m)
Airflow
(m/s)
Notes
5 25.8 52.7 45 0 50% increase in drying time for a 12% humidity
increase. The humidity of both points is still
within ‘normal’ range.5 25.5 40.6 29 0
2 25.8 37.3 10 1.3 70% decrease in drying time by introduction of
1.3m/s average airflow for comparable
temp/RH%.2 26.1 37.1 17 0
10 23.7 56.1 74 1.3 17.5% decrease in drying time for an 8%
increase in temperature.
10 25.7 55.9 61 1.3
12.
13. If you know temperature,
humidity, sample size and
airflow, the model will
calculate drying time
14. If you have a target drying
time, know the humidity of
your room and intended
sample size, the model can
suggest test variables
15. Thanks
Manchester Met
- Jake Tucker (electrical engineer)
- Joanna Verran (microbiologist)
- Lisa Simmons (physics)
Bundesanstalt für Materialforschung und -prüfung (BAM)
- Ina Stephan
- Thomas Dimke
Industrial Microbiology Services Ltd (IMSL)
- Peter Askew
International Biodeterioration Research Group (IBRG)
COST AMiCI (anti-microbial coating innovations to prevent
infectious diseases) programme
Methods Protoc. 2018, 1(4),
36; https://doi.org/10.3390/mps1040036
