|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Novel aspects for thermal stability studies and shelf life assessment of modified double-base propellants显示文摘Modified DB propellants, based on energetic nitramine(RDX) were manufactured by solventless extrusion process. Thermal stability and shelf life assessment of modified DB propellant were investigated. Shelf life assessment was evaluated using Van’t Hoff’s formula and artificial aging at 70℃ up to120 days. Quantification of total heat released and heat flow with aging time was conducted using differential scanning calorimetry(DSC) and thermal activity monitoring(TAMIII) respectively. Modified DB formulation based on 20 wt % RDX demonstrated enhanced thermal stability in terms of controlled heat flow, and slow decomposition reactions at elevated temperature. This formulation demonstrated extended service life up to 56 years compared with reference formulation. These novel finding was ascribed to the high thermal stability of RDX and its compatibility with DB constituents. This manuscript shaded the light on novel and effective approach for thermal stability via monitoring thermal activity with aging. | Sherif Elbasuney Ashraf.M. A. Elghafour Mostafa Radwan Ahmed Fahd Hosam Mostafa Ramy Sadek Amr Motaz | 2019 | Defence Technology(防务技术)2019，15，3： | 6 |
| 2 | Synthesis and Anfimicrobial Activity of Certain New 1,2,4- Triazolo pyrimidine Derivatives 显示文摘 | MOSTAFA Y A H HUSSEIN M A RADWAN A A | 2008 | Arch Pharmacal Res2008，31，3： | 1 |
| 3 | Nanothermite colloids: A new prospective for enhanced performance显示文摘Nanothermites (metal oxide/metal) can offer tremendously exothermic self sustained reactions. CuO is one of the most effective oxidizers for naonothermite applications. This study reports on two prospectives for the manufacture of CuO nanoparticles. Colloidal CuO particles of 15 nm particle size were developed using hydrothermal synthesis technique. Multiwalled carbon nanotubes (MWCNTs) with surface are 700m2/g was employed as a substrate for synthesis of CuO-coated MWCNTs using electroless plating. On the other hand, aluminium particles with combustion heat of 32000 J/g is of interest as high energy density material. The impact of stoichiometric nanothermite particles (CuO/Al & Cuo-coated MWCNTs/Al) on shock wave strength of Al/TNT nanocomposite was evaluated using ballistic mortar test. While CuO-coated MWCNTs decreased the shock wave strength by 15%;colloidal CuO enhanced the shock wave strength by 30%. The superior performance of colloidal CuO particles was correlated to their steric stabilization with employed organic solvent. This is the first time ever to report on fabrication, isolation, and integration of stablilized colloidal nanothermite particles into energetic matrix where intimate mixing between oxidizer and metal fuel could be achieved. | M. Gaber Zaky Ahmed M. Abdalla Rakesh P. Sahu Ishwar K. Puri Mostafa Radwan Sherif Elbasuney | 2019 | Defence Technology(防务技术)2019，15，3： | 1 |
| 4 | Novel approach to quantify the chemical stability and shelf life of modified double-base propellants显示文摘Double-base(DB) propellant is vulnerable to auto-catalytic decomposition reactions during storing with the evolution of nitrogen oxides. Modified DB propellant based on energetic nitramines(RDX) can offer enhanced thrust and action time. This study is devoted to evaluate the impact of RDX on chemical stability and shelf life of DB propellant. Extruded modified DB propellant based on RDX was manufactured by solventless extrusion process. Shelf life assessment was performed using an artificial aging at70 ℃ up to 120 days and employing Van't Hoffs formula. Quantification of evolved NOx gases and stabilizer depletion with aging time was conducted using Bergmann-Junk test and HPLC respectively.Modified DB formulation based on RDX 20 wt % demonstrated enhanced chemical stability and extended service life up to 46 years compared with reference formulation. This finding was ascribed to the high chemical and thermal stability of RDX as well as its compatibility with DB constituents; no side chemical reactions could take place during storing. This manuscript shaded the light on RDX as effective energetic constituent that offered DB propellants with enhanced performance, good chemical stability, and extended service life. | Ashraf M.A.Elghafour Mostafa Radwan Ahmed Fahd Hosam E.Mostafa Sherif Elbasuney | 2018 | Defence Technology(防务技术)2018，14，6： | 1 |
| 5 | Approximations by Ideal Minimal Structure with Chemical Application显示文摘The theory of rough set represents a non-statistical methodology for analyzing ambiguity and imprecise information.It can be characterized by two crisp sets,named the upper and lower approximations that are used to determine the boundary region and accurate measure of any subset.This article endeavors to achieve the best approximation and the highest accuracy degree by using the minimal structure approximation space MSAS via ideal J.The novel approach(indicated by JMSAS)modifies the approximation space to diminish the bound-ary region and enhance the measure of accuracy.The suggested method is more accurate than Pawlak’s and EL-Sharkasy techniques.Via illustrated examples,several remarkable results using these notions are obtained and some of their properties are established.Several sorts of near open(resp.closed)sets based on JMSAS are studied.Furthermore,the connections between these assorted kinds of near-open sets in JMSAS are deduced.The advantages and disadvan-tages of the proposed approach compared to previous ones are examined.An algorithm using MATLAB and a framework for decision-making problems are verified.Finally,the chemical application for the classification of amino acids(AAs)is treated to highlight the significance of applying the suggested approximation. | Rodyna A.Hosny Radwan Abu-Gdairi Mostafa K.El-Bably | 2023 | Intelligent Automation & Soft Computing2023，，6： | 0 |
| 6 | Schistosomal(bilharzial)polyps:Travel through the colon and beyond显示文摘Schistosomiasis(bilharziasis)is a major neglected tropical disease.It is endemic in many tropical and subtropical communities.Schistosomal polyps(S.polyps)are not uncommon presentation of this infection.Although the colon is the most commonly affected organ,many other organs are affected.S.polyps are associated with a variable range of morbidity independent of the Schistosomal infection.S.polyps are frequently described in endemic areas and increasingly reported in non-endemic areas mainly among immigrants and visitors to the endemic areas.This review aimed to increase awareness of practitioners,especially gastroenterologists,for this peculiar type of polyps caused by this neglected infection hence improving patient outcomes.Web-based search of different databases was conducted for the literature focusing the development of S.polyps in the colon and other organs with analysis of the clinical manifestations,diagnosis and treatment.The following key words were used in the search,“Schistosomiasis”OR“Bilharziasis”AND“Polyps”OR“Polyp”AND“Colon”OR“Small intestine”OR“Duodenum”OR“Stomach”OR“Esophagus”OR”Gallbladder”OR”Pharynx”OR“Larynx”OR“Trachea”OR”Urinary bladder”OR“Ureter”OR“Renal Pelvis”OR“Urethra”.All publication types including case reports,case series,original research,and review articles were retrieved and analyzed.S.polyps are not infrequent presentation of acute or chronic Schistosomal infection.S.polyps are described in many organs including the bowel,genitourinary tract,skin,gallbladder and the larynx.Presentation of S.polyps is variable and depends on the site,number as well as the polyp size.The relationship of S.polyps to malignant transformation is a matter of discussion.Presence of S.polyps is sometimes the only manifestation of Schistosomiasis.Small polyps can be treated medically with praziquantel,while large accessible polyps are amendable for endoscopic excision through different polyp resection techniques.However,huge,complicated,non-accessible and suspicious polyps are indicated for surgical management or advanced endoscopic resection when appropriate.Clinicians and endoscopists should be aware about these facts when treating patients living in,immigrated from or visiting endemic areas. | Mohamed H Emara Aya M Mahros Abdelrahman M Ahmed Rasheda Mohamed I Radwan Besher Mohamed Osama Abdelrazik Mostafa Elazab Hassan Elbatae | 2023 | World Journal of Gastroenterology2023，29，26： | 0 |
| 7 | 印尼BAKOSURTANAL地形和地面信息数字数据库的建立显示文摘为了支持自然资源调查的国家纲要,BAKOSURTANAL——印度尼西亚国家测绘机构,十分重视数字地形数据库(DTDB)的建立。虽然迫切需要使数字数据的采集以ad hoc为基础,BAKOSURTANAL的策略,仍然是利用所有有用的数据,系统地建立与维护DTDB,以便使DTDB能不断地为潜在的用户所利用。 | M Mostafa Radwan Paul Suharto Sutrisno Yono 谢钢生 | 1991 | 华东地质学院学报1991，14，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员