نتایج جستجو برای: petn
تعداد نتایج: 243 فیلتر نتایج به سال:
Numerous crystal- and microstructural-level mechanisms are at play in the formation of hotspots, which known to govern high explosives initiation behavior. Most these mechanisms, including pore collapse, interfacial friction, shear banding, involve both compressive work done within material have thus far remained difficult separate. We assess hotspots formed shocked crystal–crystal interfaces u...
The Fluorescence sensing technique for trace detection of High Energy Materials (HEMs) has gained more attention in recent times. In the present paper, interaction between fluorophore and HEMs is studied using spectroscopic electrochemical techniques. polyaniline (PANI) was functionalised by doping it with benzenesulfonic acid (BSA) to increase processability, mobility ?-electrons along decreas...
New lead-free primary explosives are needed for safe future ignition and initiation applications. Especially, by low-energy laser irradiation has been demonstrated to be a valuable method. For this technology, with safer sensitivities needed. In order adjust the desired properties of neat explosives, we follow concept “energetic coordination compounds” (ECC) in which ligand significantly alters...
Analyses of sequence data from three nuclear genes and one chloroplast gene region for Juniperus blancoi, J. b. var. huehuentensis, J. mucronata, J. scopulorum and J. virginiana revealed that the J. blancoi huehuentensis mucronata complex is closely allied but distinct from J. scopulorum and very distinct from J. virginiana. The combined DNA data support J. mucronata as a sibling species to J. ...
Several relations are presented in order to specify blasting dynamic loading associated with analytical, field and experimental analysis. Dynamic loading type, maximum pressure and consequent duration time can affect the numerical simulation results of fragmentations, damage zone and maximum radial crack length in the vicinity of the blast hole and ground vibrations. These in turn depend on the...
امروزه جهت استخراج سنگهای سخت مانند گرانیت از برش با سیم الماسه استفاده می-شود. در این تحقیق امکان پذیری استفاده از روش انفجار کنترل شده برای استخراج سنگهای ساختمانی سخت مورد بررسی قرار گرفت. روش انفجار کنترل شده، پیش شکافی است که در معدن گرانیت شاهکوه نهبندان مورد استفاده قرار گرفت. یک بلوک از گرانیت با عرض 5، طول 3/11 و ارتفاع 5/2 تا 8/5 متر برای انجام آزمایش انتخاب شد. برای انجام آزمایش 102 ...
The structure of a antigen-binding fragment (Fab) from the bactericidal monoclonal antibody LPT3-1 specific to lipooligosaccharide (LOS) inner cores from Neisseria meningitidis has been solved in complex with an eight-sugar inner core fragment NmL3 galE lpt3 KOH to 2.69 Å resolution. The epitope is centered about an inner core N-acetylglucosamine residue unique to N. meningitidis and does not i...
Eastern Asia (EA) is a key region for the diversification of flowering plants in the Northern Hemisphere, but few studies have focused on the biogeographic history within EA in the context of the other northern continents. Polygonatum is an important medicinal genus widely distributed in the Northern Hemisphere with its highest species richness in EA, and it represents an excellent model for st...
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