نتایج جستجو برای: burning
تعداد نتایج: 18519 فیلتر نتایج به سال:
Mechanical properties and burning rate are very important parameters for solid propellants. In this work, the effects of quality and quantity of stabilizers as AkarditeII, 2-NDPA and CentraliteI on the Mechanical properties and burning rate of double-based is investigated. The results showed that, by CentraliteI increased mechanical properties of propellant and for AkarditeII and 2-NDPA stabili...
correlation between burning mouth syndrome and anxiety in the elderly inmates of sanitaria in tehran
background and aims. burning mouth syndrome (bms) is a chronic pain disorder characterized by a chief complaint of oral burning/pain with no clinically observable oral mucosal lesions. the prevalence of bms has been reported to be 2.5-5.1% in the general population and several psychological disorders have been reported as associated or predisposing factors for bms. the aim of this study was to ...
Burning agricultural straw before and/or after harvest is a common farming practice. Regional and extensive agricultural open field straw burning can cause serious air pollution events. This paper looks at the effects of biomass burning emission on regional haze that should be considered in the forecasting of regional haze. It describes the current state of crop residue burning in China, and an...
In this study, the combustion characteristics and burning rate of RDX/AP/Al/HTPB composite solid propellant were studied experimentally. Five different RDX-based propellant compositions have been formulated and the burning rate and calorimetric value were evaluated. The burning rates of RDX composite solid propellants increased with increasing RDX content. The data obtained from experimental te...
The aim of the study was to determine the level of anxiety and depression in patients with and without burning mouth syndrome, and to assess the possible association between the intensity of burning mouth and incidence of depression and anxiety. The study was conducted in a sample of 120 randomly chosen adult patients from two dentist offices in Nova Gradiska (Croatia). Patient data were collec...
PM2.5 inventories have been developed inmajor Chinese cities to quantify the contributions from various sources based on annual emissions. This approach, however, could substantially underestimate the contribution fromopen straw burning during the harvest or other active burning periods. This study examines this issue by estimatingmonthly and annual straw-burning PM2.5 emissions in China and co...
self-burning is the most devastating burn injur y. it is a common social and medical problem in iran. in a longitudinal prospective study, from april 2003 to march 2006, all burn patients admitted to ghotb-eddin burn hospital were enrolled in this study. suicide attempts by burning accounted for 283 (21.9%) of all burn patients admitted to the hospital. most (68.2%) of self-burning patients wer...
While various energy-producing technologies have been analyzed to assess the amount of energy returned per unit of energy invested, this type of comprehensive and comparative approach has rarely been applied to other potentially limiting inputs such as water, land, and time. We assess the connection between water and energy production and conduct a comparative analysis for estimating the energy...
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BACKGROUND Charcoal-burning, a new suicide method, emerged in Hong Kong during the latest economic recession. Within 2 months charcoal-burning had become the third most common suicide method. AIMS To examine the characteristics of suicides by charcoal-burning, and to delineate the pathways linking macro-level economic and social changes with the subjective experiences of those surviving a cha...
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