scholarly journals Aerosol sampling and Transport Efficiency Calculation (ASTEC) and application to surtsey/DCH aerosol sampling system: Code version 1. 0: Code description and user's manual

1989 ◽  
Author(s):  
N. Yamano ◽  
J. E. Brockmann
Keyword(s):  
Aerosol Sampling ◽  
Sampling System ◽  
Transport Efficiency ◽  
Efficiency Calculation ◽  
Code Version

Precision of an Ambient Sequential Acid Aerosol Sampling System

1993 ◽  
Vol 8 (4) ◽  
pp. 313-316 ◽  
Author(s):  
Peter A. Jaques ◽  
George D. Thurston ◽  
Patrick L. Kinney ◽  
John E. Gorczynski
Keyword(s):  
Aerosol Sampling ◽  
Sampling System

scholarly journals Monitoring for airborne respiratory viruses in a general pediatric ward in Singapore

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Su Yadana ◽  
Kristen Kelli Coleman ◽  
Tham Thi Nguyen ◽  
Christophe Hansen-Estruch ◽  
Shirin Kalimuddin ◽  
...  
Keyword(s):  
Influenza A ◽  
Occupational Safety ◽  
Rna Extraction ◽  
Hospital Setting ◽  
Respiratory Viruses ◽  
Aerosol Sampling ◽  
Sampling System ◽  
Safety And Health ◽  
Clinical Environments ◽  
Airborne Viruses

There is an increasing body of evidence suggesting that transmission of respiratory viruses occurs through the inhalation of virus-laden particles. Our study describes the use of an aerosol sampling system to monitor the prevalence of airborne viruses in a hospital setting. Using SKC AirCheck Touch pumps, with National Institute for Occupational Safety and Health (NIOSH) bioaerosol samplers and SKC filter cassette blanks, 28 aerosol samples were collected in a hospital ward in Singapore. Following DNA/RNA extraction, real-time RT-PCR/PCR was used for the detection of influenza A, B and D viruses, coronaviruses, enteroviruses, and adenoviruses. Airborne virus was detected in nine (32%) of 28 samples. Among the nine positive samples, eight were PCR-positive for adenovirus and one for influenza A virus. Our data suggest that bioaerosol sampling could be valuable in monitoring for airborne respiratory viruses in clinical environments to better understand the risk of infection during a hospital visit.

AEROSOL SAMPLING SYSTEM FOR COLLECTION OF CAPSTONE DEPLETED URANIUM PARTICLES IN A HIGH-ENERGY ENVIRONMENT

2009 ◽  
Vol 96 (3) ◽  
pp. 221-237 ◽  
Author(s):  
Thomas D. Holmes ◽  
Raymond A. Guilmette ◽  
Yung Sung Cheng ◽  
Mary Ann Parkhurst ◽  
Mark D. Hoover
Keyword(s):  
High Energy ◽  
Depleted Uranium ◽  
Aerosol Sampling ◽  
Sampling System ◽  
Energy Environment

Aircraft-Carried Aerosol Sampling Inlet by CFD Simulation

2013 ◽  
Vol 319 ◽  
pp. 633-636
Author(s):  
Bao Qing Wang ◽  
Yu Hong Liu ◽  
Shi Quan Lan ◽  
Shu Yao ◽  
Shuai Yin
Keyword(s):  
Flow Rate ◽  
High Speed ◽  
Cfd Simulation ◽  
Tube Diameter ◽  
Aerosol Sampling ◽  
Sampling System ◽  
Suction Tube ◽  
Bending Radius ◽  
Diffusion Tube

A aerosol sampling inlet has been designed from high-speed aircraft. The objective of the design is to achieving isokinetic and minimizing disturbance for the sampling system. This study was conducted using the CFD code to perform a turbulent simulation of the airflow on the aerosol sampling inlet. The inlet is flown regularly on board an aircraft of Yun-12. The flow rate through the sampling suction tube is a constant value of 100 L/min. The shroud diameter is 150 mm. The diffusion tube inlet and outlet diameter is 35.3 mm. The suction tube diameter is 20.6 mm, which act as transferring aerosol at the velocity of 5 m/s. Results are presented graphically, showing the suction bending radius take 50 mm is more appropriate. It is shown that the diffusion tube slows the sample flow from 40 m/s of the airspeed of the aircraft to approximately 5 m/s. It is suggested that CFD simulation can be useful for improving the optimum aircraft-carried aerosol sampling inlet.

MULTI-SITE AEROSOL MONITORING USING MINI STEP SAMPLER

2003 ◽  
Vol 13 (01n02) ◽  
pp. 65-80 ◽  
Author(s):  
S. Matsuyama ◽  
K. Katoh ◽  
S. Sugihara ◽  
K. Ishii ◽  
H. Yamazaki ◽  
...  
Keyword(s):  
Meteorological Data ◽  
Pollution Monitoring ◽  
Aerosol Sampling ◽  
Sampling System ◽  
Night Time ◽  
Simultaneous Exposure ◽  
Air Pollution Monitoring ◽  
Elemental Concentrations ◽  
Sources Of Pollution ◽  
Suction Nozzle

We developed mini step samplers with low manufacturing and running costs for application in multi-site air-pollution monitoring. The miniaturization of the sampler was achieved by reducing the suction nozzle size. We tested the samplers with suction nozzle diameters of 2 and 4 mm through simultaneous exposure in the same site. Elemental concentrations of aerosol collected by these samplers were consistent within ±20% during comparison and the sample uniformity did not differ significantly. Sampling with small suction nozzle did not adversely affect aerosol collection. Aerosol samples were collected simultaneously at two sites in our laboratory and in the hall outside for 3 days and analyzed subsequently by PIXE. The time variation of elemental concentrations was high during daytime and low at night time and also during the weekend. Elemental concentrations in the hall were always higher than those in the laboratory. In our laboratory, we change shoes at the entrance and therefore, elemental concentrations inside the lab are lower than in the hall. In a second field experiment, we carried out simultaneous multi-site aerosol sampling during two periods in correlation with meteorological data (wind direction and velocity). It was observed that elemental concentrations of some soil origin elements changed periodically. On the other hand, the concentration of Cu and Zn showed irregular concentration spikes whose pattern showed a variation with the sites. Analysis using the data of wind directions showed that Cu had been transported to the sites from northeasterly direction and that the concentration of Zn was influenced by two big factories nearby. In conclusion, it has been demonstrated that the multi-site sampling system combined with meteorological data is well suited to identify sources of pollution.

Evaporation of sulfuric acid-water particles in an aircraft-borne aerosol sampling system

1999 ◽  
Vol 30 ◽  
pp. S155-S156
Author(s):  
M. Wilck ◽  
M. Hermann ◽  
S. Bra¨sel ◽  
F. Stratmann
Keyword(s):  
Sulfuric Acid ◽  
Acid Water ◽  
Aerosol Sampling ◽  
Sampling System

scholarly journals Twenty-four hour face mask sampling in pulmonary tuberculosis reveals three distinct patterns of bacterial aerosol production dissociated from conventional markers of transmission risk

2018 ◽  
Author(s):  
CML Williams ◽  
M Abdulwhhab ◽  
SS Birring ◽  
E De Kock ◽  
NJ Garton ◽  
...  
Keyword(s):  
Face Mask ◽  
Transmission Risk ◽  
Sputum Smear ◽  
Aerosol Sampling ◽  
Sampling System ◽  
Tuberculosis Case ◽  
Pulmonary Tb ◽  
Cough Frequency ◽  
Hospitalised Patients ◽  
Bacterial Aerosol

Rationale:Although tuberculosis (TB) is transmitted byMycobacterium tuberculosis(Mtb) in aerosols, little is known of the dynamic characteristics of spontaneous output of bacilli in this form. We have developed and implemented a mask aerosol sampling system (MASS) for longitudinal capture and study of spontaneous aerosol.Objective:To determine patterns of Mtb output in aerosols, captured using the MASS over 24 hours and their association with existing criteria used to assess transmission risk in patients with pulmonary TB.Methods:Twenty-four hospitalised patients with newly diagnosed pulmonary TB recruited in Pretoria, South Africa, wore FFP1 masks for one hour out of every three for 24 hours. Aerosol was captured in a gelatine filter processed for Mtb quantitation by PCR. Serial sputum was collected and objective cough frequency monitoring performed over the same period.Measurements and Main Results:Mtb was detected in 86.5% of 192 mask samples and 20.7% of 38 assessable sputum samples obtained from the cohort. Mtb was detected by MASS in all but two patients. Three dynamic patterns of expression were identifiable in Mtb aerosol producers: i. variable high; ii. consistent; and iii. variable low. No diurnal variation was apparent and there was no correlation between mask Mtb and either sputum Mtb levels or cough frequency. Sputum smear status, culture time to positivity and chest radiographic characteristics also failed to associate with MASS bacillary output.Conclusions:Conventional markers of tuberculosis case infectivity do not predict bacillary aerosols detected by the MASS. The MASS provides a novel, non-invasive tool for tuberculosis diagnosis and control.

scholarly journals Evaluation of a Bioaerosol Sampler for Indoor Environmental Surveillance of Severe Acute Respiratory Syndrome Coronavirus 2

2021 ◽  
Author(s):  
Patrick F. Horve ◽  
Leslie Dietz ◽  
Dale Northcutt ◽  
Jason Stenson ◽  
Kevin G. Van Den Wymelenberg
Keyword(s):  
Severe Acute Respiratory Syndrome ◽  
Short Range ◽  
Risk Mitigation ◽  
Mitigation Strategy ◽  
Indoor Environments ◽  
Aerosol Sampling ◽  
Environmental Surveillance ◽  
Sampling System ◽  
Bench Scale ◽  
Indoor Aerosol

The worldwide spread of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) has ubiquitously impacted many aspects of life. As vaccines continue to be manufactured and administered, limiting the spread of SARS-CoV-2 will rely more heavily on the early identification of contagious individuals occupying reopened and increasingly populated indoor environments. In this study, we investigated the utility of an impaction-based aerosol sampling system with multiple nucleic acid collection media. Heat-inactivated SARS-CoV-2 was utilized to perform bench-scale, short-range aerosol, and room-scale aerosol experiments. Through bench-scale experiments, AerosolSense Capture Media (ACM) and nylon flocked swabs were identified as the highest utility media. In room-scale aerosol experiments, consistent detection of aerosol SARS-CoV-2 was achieved at a concentration equal to or greater than 0.089 genome copies per liter of room air (gc/L) when air was sampled for eight hours or more at less than one air change per hour (ACH). Shorter sampling periods (~75 minutes) yielded consistent detection at ~31.8 gc/L of room air and intermittent detection down to ~0.318 gc/L at (1 and 6+ ACH respectively). These results support further exploration in real-world testing scenarios and suggest the utility of indoor aerosol surveillance as an effective risk mitigation strategy in occupied buildings.

Sign in / Sign up

Export Citation Format

Share Document