نتایج جستجو برای: ماده منفجره tnt
تعداد نتایج: 36302 فیلتر نتایج به سال:
The bioreduction of solid TNT by a Pseudomonas fluorescens strain was investigated in a stirred tank reactor. Experiments in which TNT beads were the only solids present indicated that the biodegradation mechanism is dissolution followed by degradation in bulk solution. Dissolution may limit the overall rate, in which case degradation can be enhanced through increased agitation. Since soil slur...
2,4,6-Trinitrotoluene (TNT) is released in nature from manufacturing or demilitarization facilities, as well as after the firing or detonation of munitions or leakage from explosive remnants of war. Environmental contamination by TNT is associated with human health risks, necessitating the development of cost-effective remediation techniques. The lack of affordable and effective cleanup technol...
Red or aerobic muscle from the anterior of rainbow trout Oncorhynchus mykiss activates (generates force) more quickly than that from the posterior. TnT is a component of the troponin complex that modulates muscle activation once Ca(2+) is bound. Since trout express at least two forms of TnT in their red muscle (S1 and S2), the differential expression of these two forms was predicted to explain ...
A high sensitivity homogeneous immunoassay for TNT and its analogues has been developed based on the rapid electrophoretic separation of an equilibrated mixture of an anti-TNT antibody, fluorescein-labeled TNT, and unlabeled TNT or its analogue. The band intensities of the free fluorescein-labeled TNT and of the antibody-antigen complex reveal the relative equilibrated concentrations. TNT and i...
Trinitrotoluene (TNT), a commonly used explosive for military and industrial applications, can cause serious environmental pollution. 28-day laboratory pot experiment was carried out applying bioaugmentation using laboratory selected bacterial strains as inoculum, biostimulation with molasses and cabbage leaf extract, and phytoremediation using rye and blue fenugreek to study the effect of thes...
Photovoltaic characteristics of dye-sensitized solar cells (DSSCs) using TiO2 nanotube (TNT) arrays as photoanodes were investigated. The TNT arrays were 3.3, 11.5, and 20.6 μm long with the pore diameters of 50, 78.6, and 98.7 nm, respectively. The longest TNT array of 20.6 μm in length showed enhanced photovoltaic performances of 3.87% with significantly increased photocurrent density of 8.26...
در سال های اخیر تحقیق روی موادی که می توانند به عنوان آشکارساز برای مواد منفجره مورد استفاده قرار گیرند بیشتر مورد توجه قرار گرفته است. در گذشته از آشکارسازهایی مانند اتیلن گلیکول دی نیترات (egdn)، ارتو- مونونیتروتولوئن (omnt) و پارا- مونونیتروتولوئن (pmnt) استفاده می شد که امروزه dmdnb به دلیل پایداری بیشتر، سمیت کمتر، سازگاری بهتر با مواد منفجره و خاصیت شناسایی بهتر که حتی ppb 5/0 آن در هوا ق...
پدیده انفجار یک فرآیند ناگهانی با فیزیکی بسیار پیچیده است که در طی آن مقدار زیادی انرژی آزاد می شود. مسلما شناخت فعل و انفعالاتی که در طی این فرایند رخ می دهد چندان ساده نیست و از طرفی آنچه که بیش از خود این فرآیند برای ما اهمیت دارد نتایج و یا محصولات حاصل از این فرآیند است. روش های المان محدود، تحلیلی و تجربی برای بررسی رفتار موج شوک وجود دارد که در این میان روش المان محدود می تواند جایگزین م...
Low-order detonations of military munitions scatter cm-sized chunks of high-explosives onto military range soils, where rainfall can dissolve and then transport the explosives to groundwater. We present 1 year of mass-loss data obtained from cm-sized chunks of the frequently used explosives TNT (2,4,6-trinitrotoluene) and Tritonal (an 80:20 mixture of TNT and aluminum flakes) exposed outdoors t...
INTRODUCTION: Numerous ammunition manufacturing facilities and ammunition testing sites across the world are faced with environmental problems associated with soils contaminated with trinitrotoluene (TNT) and other nitroaromatic compounds. Although a number of TNT treatment technologies have been developed recently [1,2], these techniques do not result in a high degree of mineralization of the ...
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