نتایج جستجو برای: leaf burning

تعداد نتایج: 103725  

2007
CATHRYN H. GREENBERG

We compared the effects of 3 fuel reduction techniques and a control on breeding birds during 2001–2005 using 50-m point counts. Four experimental units, each .14 ha, were contained within each of 3 replicate blocks at the Green River Game Land, Polk County, North Carolina, USA. Treatments were 1) prescribed burn, 2) mechanical understory reduction (chainsaw-felling of shrubs and small trees), ...

2016
Longyi Shao Cong Hou Chunmei Geng Junxia Liu Ying Hu Jing Wang Tim Jones

Coal contains many potentially harmful trace elements. Coal combustion in 22 unvented stoves, which is common in most parts of rural China, can release harmful emissions 23 into the air that when inhaled cause health issues. However, few studies have dealt specifically 24 with the toxicological mechanisms of the particulate matter (PM) released by coal and other 25 solid fuel combustion. In thi...

ژورنال: مواد پرانرژی 2020

Deterrents are materials that use in gun propellant formulations as controlling initial burning rate and to prevent of high chamber pressures in the interior ballistic. However, traditional deterrents are highly toxic and suspected carcinogen which makes them chemicals of concern that are non-energetic inert compound and reduce total chemical energy of propellant and reduce final performance of...

Journal: :The European respiratory journal 2011
I-J Wang C-H Tsai C-H Chen K-Y Tung Y L Lee

Incense burning is a popular practice in many family homes and temples. However, little is known about the effects of indoor incense burning and genetic polymorphisms on asthma. This study evaluated the effects of indoor incense burning and glutathione S-transferase (GST) genetic polymorphisms on asthma and wheeze. In 2007, 3,764 seventh-grade schoolchildren (mean±sd age 12.42±0.65 yrs) were ev...

Journal: :The Science of the total environment 2016
Fang Cao Shi-Chun Zhang Kimitaka Kawamura Yan-Lin Zhang

To better characterize the chemical compositions and sources of fine particulate matter (i.e. PM2.5) in Sanjiang Plain, Northeast China, total carbon (TC), organic carbon (OC), elemental carbon (EC), water-soluble organic carbon (WSOC), and inorganic ions as well as stable carbon isotopic composition (δ13C) were measured in this study. Intensively open biomass burning episodes are identified fr...

Journal: :Journal of epidemiology and community health 2007
Ka Y Liu Annette Beautrais Eric Caine Kathy Chan Anne Chao Yeates Conwell Chikin Law Dominic Lee Pichiang Li Paul Yip

OBJECTIVES Following the first case in Hong Kong in 1998, the method of committing suicide by charcoal burning has spread to other communities. This aim of this study was to examine the impact of charcoal burning suicides on both overall suicide rates and older-method suicide rates in Hong Kong and urban Taiwan. DESIGN Trend analysis of the overall and method-specific suicide rates between 19...

2010
S. E. Woosley A. R. Kerstein A. J. Aspden

The flame in a Type Ia supernova is a conglomerate structure which, depending on density, may involve separate regions of carbon, oxygen and silicon burning, all propagating in a self-similar, subsonic front. The separation between these three burning regions increases as the density declines until eventually, below about 2 × 10 g cm, only carbon burning remains active, the other two burning ph...

2006
Atul K. Jain Zhining Tao Xiaojuan Yang Conor Gillespie

[1] Open fire biomass burning and domestic biofuel burning (e.g., cooking, heating, and charcoal making) algorithms have been incorporated into a terrestrial ecosystem model to estimate CO2 and key reactive GHGs (CO, NOx, and NMHCs) emissions for the year 2000. The emissions are calculated over the globe at a 0.5 0.5 spatial resolution using tree density imagery, and two separate sets of data e...

خلیلیان, علیرضا, ضرغامی, مهران,

AbstractObjectives: This study was designed to examine the demographic features, correlates, motives and the status of the people who commit self-burning behavior. Method: In a descriptive study, 318 self-burning  cases admitted within a period of three years to the only burn center in the province of Mazandaran were studied through a demographic questionnaire and a semi- structured interview. ...

ژورنال: مواد پرانرژی 2017
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In this study, effects of longitudinal and rotational accelerations on the Internal Ballistic Solid Propellant Rocket are investigated. First, a quasi one-dimensional flow is considered to drive governing equations. By assuming semi- permanent flow and neglecting heat transfer through the walls, at each time increment the governing equations are integrated along the length of motor. Then, using...

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