Results 31 to 40 of about 35,378 (207)

Features of sonographic parameters of liver in practically healthy men of different somatotypes, in the Podilski region of Ukraine

Current Issues in Pharmacy and Medical Sciences, 2017
The analysis of liver sonographic parameters of healthy men of the Podilski region of Ukraine who are of different somatotypes has revealed significant differences only in the thickness of the right lobe of the liver on inhalation, as well as in the ...
Gunas Igor, Melnik Marina, Majewskyi Olexandr, Shevchuk Yuriy   +3 more
doaj   +1 more source

Radon Exhalation Patterns in A Dead-end Tunnel

MATEC Web of Conferences, 2016
The regularity of radon exhalation rate in the over-broken granite tunnel is susceptible to weather conditions and ventilation styles. Based on the calculation model of radon exhalation in tunnel, some experiments have been carried out to analyze the ...
Wang Shu Guang, Niu Xiao Bing, Chen Qing, Yang Wei   +3 more
doaj   +1 more source

Cytotoxicity of filtering respiratory protective devices from the waste sorting industry: A comparative study between interior layer and exhalation valve

Environment International, 2021
Filtering respiratory protection devices (FRPD) are mandatory for workers to wear in the Portuguese waste-sorting industry. Previous results regarding microbial contamination found on FRPD interior layer raised the question of whether microbial ...
Carla Viegas, Magdalena Twarużek, Marta Dias, Beatriz Almeida, Elisabete Carolino, Ewelina Soszczyńska, Susana Viegas, Liliana Aranha Caetano   +7 more
doaj   +1 more source

Non-uniform Segmental Range of Motion of the Thoracic Spine During Maximal Inspiration and Exhalation in Healthy Subjects

Frontiers in Medicine, 2021
Background and Objective: To analyse the range of motion of the thoracic spine by radiographically measuring changes in the sagittal profile of different thoracic segments during maximal inspiration and exhalation. The starting hypothesis was that forced
J. Burgos, C. Barrios, G. Mariscal, Alejandro Lorente, R. Lorente   +4 more
semanticscholar   +1 more source

Sources of Radon and its Measurement Techniques in Underground Uranium Mines – An Overview

Journal of Sustainable Mining, 2014
Purpose: This study aims to identify the potential sources of radon exhalation and its measurement in underground uranium mines to control the radiation levels within safe limits and protect miners from radiation hazards. Methods: An extensive literature
Patitapaban Sahu, Durga Charan Panigrahi, Devi Prasad Mishra   +2 more
doaj   +1 more source

Long-Term Measurements of Radon and Thoron Exhalation Rates from the Ground Using the Vertical Distributions of Their Activity Concentrations

International Journal of Environmental Research and Public Health, 2021
A long-term measurement technique of radon exhalation rate was previously developed using a passive type radon and thoron discriminative monitor and a ventilated type accumulation chamber.
Oumar Bobbo Modibo, Y. Tamakuma, Takahito Suzuki, R. Yamada, W. Zhuo, C. Kranrod, K. Iwaoka, N. Akata, M. Hosoda, S. Tokonami   +9 more
semanticscholar   +1 more source

Effect on Radon Exhalation Rate Due to Cracks in Concrete

Nordic Concrete Research, 2019
The second largest cause of lung cancer in the World is related to radon (222Rn) and its progenies in our environment. Building materials, such as concrete, contribute to the production of radon gas through the natural decay of 238U from its constituents.
Döse Magnus, Silfwerbrand Johan
doaj   +1 more source

Flow visualization of an N95 respirator with and without an exhalation valve using schlieren imaging and light scattering

The Physics of Fluids, 2020
This work demonstrates the qualitative fluid flow characteristics of a standard N95 respirator with and without an exhalation valve. Schlieren imaging was used to compare an adult male breathing through an N95 respirator with and without a valve.
M. Staymates
semanticscholar   +1 more source

Outdoor radon and thoron in an area with naturally ventilating bedrock fractures

Frontiers in Environmental Science
Open fractures lead to increased permeability of the bedrock, and, if connected to the surface, allow for groundwater flow and air ventilation. Radon and thoron received by groundwater and ventilating air from bedrock can then be released at the surface.
Hallvard Haanes, Paula Snook, Alexander Maschler, Thomas Scheiber   +3 more
doaj   +1 more source

Radon exhalation rate and radon activity in soils of riverine environs of South Karnataka

Radiation Protection and Environment, 2018
In the present study, sealed “can technique” using solid-state nuclear track detector (LR-115) films was employed to measure the radon exhalation rate and radium concentration in soil samples of Cauvery river environment.
C S Kaliprasad, Y Narayana
doaj   +1 more source