نتایج جستجو برای: airborne

تعداد نتایج: 22242  

2012
Gwo-Hwa Wan Chung-Guei Huang Yhu-Chering Huang Ju-Ping Huang Su-Li Yang Tzou-Yien Lin Kuo-Chien Tsao

This investigation evaluated the distributions of airborne adenovirus and Mycoplasma pneumoniae in public areas in the pediatric department of Children's Hospital in northern Taiwan. The airborne viral and bacterial concentrations were evaluated twice a week for a year using filter sampling with an airflow rate of 12 liters per minute for eight hours in the pediatric outpatient department and 2...

2015
M. Bonini S. T. E. Lommen

This study aims to determine whether a significant decrease in airborne concentrations of Ambrosia pollen witnessed in the north-west of the Province of Milan in Northern Italy could be explained by environmental factors such as meteorology, or whether there is evidence to support the hypothesis that the decrease was related to the presence of large numbers of the oligophagous Ophraella communa...

Journal: :Frontiers in bioscience 2011
Anne Oppliger Frederic G Masclaux Helene Niculita-Hirzel

Most airborne microorganisms are natural components of our ecosystem. Soil, vegetation and animals, including humans, are sources for aerial release of these living or dead cells. In the past, assessment of airborne microorganisms was mainly restricted to occupational health concerns. Indeed, in several occupations, exposure to very high concentrations of non-infectious airborne bacteria and fu...

Journal: :Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada 2007
Paul R Sheppard Paul Toepfer Elaine Schumacher Kent Rhodes Gary Ridenour Mark L Witten

Morphological and chemical characteristics were determined for airborne tungsten particles in Fallon, Nevada, a town that is distinguishable environmentally by elevated airborne tungsten and cobalt. From samples of airborne dust collected previously at six different places in Fallon, tungsten-rich dust particles were isolated and analyzed with automated electron microprobe and wavelength-disper...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Mark Zanin Sook-San Wong Subrata Barman Challika Kaewborisuth Peter Vogel Adam Rubrum Daniel Darnell Atanaska Marinova-Petkova Scott Krauss Richard J Webby Robert G Webster

North American wild birds are an important reservoir of influenza A viruses, yet the potential of viruses in this reservoir to transmit and cause disease in mammals is not well understood. Our surveillance of avian influenza viruses (AIVs) at Delaware Bay, USA, revealed a group of similar H1N1 AIVs isolated in 2009, some of which were airborne-transmissible in the ferret model without prior ada...

Journal: :رادار 0
محمد ساده لاری حبیب اله عبیری

in this paper, a resonant slotted waveguide array antenna with circular boundary has been designed and simulated for mono-pulse airborne radar applications. the antenna parameters are:11% bandwidth in x-band (8.6-9.6ghz),vswr < 2, 38dbi directivity, sidelobes level of - 20db and 3-db beam-widths of 2.1degree. to design this antenna, it is divided into short sections (sub-arrays) each with a uni...

1998
David Small Paolo Pasquali Francesco Holecz Erich Meier Daniel Nüesch

Interferometric synthetic aperture radar (InSAR) has become a broad field encompassing the use of both airborne and spaceborne sensors operating at a range of wavelengths and resolutions. This paper derives general conclusions from experiences at the Remote Sensing Laboratories of the University of Zürich with a variety of airborne and spaceborne InSAR sensors. Results from multiple systems ope...

Journal: :Asian-Australasian journal of animal sciences 2016
Priyanka Kumari Joonhee Lee Hong-Lim Choi

We studied airborne contaminants (airborne particulates and odorous compounds) emitted from compost facilities in South Korea. There are primarily two different types of composting systems operating in Korean farms, namely mechanical aerated pile composting (MAPC) and aerated static pile composting (SAPC). In this study, we analyzed various particulate matters (PM10, PM7, PM2.5, PM1, and total ...

2015
Jing Lv Liangmeng Wei Yan Yang Bingxiao Wang Wei Liang Yuwei Gao Xianzhu Xia Lili Gao Yumei Cai Peiqiang Hou Huili Yang Airong Wang Rong Huang Jing Gao Tongjie Chai

Cases of H9N2 avian influenza virus (AIV) in poultry are increasing throughout many Eurasian countries, and co-infections with other pathogens have resulted in high morbidity and mortality in poultry. Few studies have investigated the genetic factors of virus airborne transmission which determine the scope of this epidemic. In this study, we used specific-pathogen-free chickens housed in isolat...

Journal: :Applied and environmental microbiology 2008
Noah Fierer Zongzhi Liu Mari Rodríguez-Hernández Rob Knight Matthew Henn Mark T Hernandez

Airborne microorganisms have been studied for centuries, but the majority of this research has relied on cultivation-dependent surveys that may not capture all of the microbial diversity in the atmosphere. As a result, our understanding of airborne microbial ecology is limited despite the relevance of airborne microbes to human health, various ecosystem functions, and environmental quality. Cul...

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