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nitroxy-and azidomethyl azofurazans as advanced energetic materials

Defence Technology（防务技术） 2022年第8期18卷 1369-1381页

作者： Aleksei B.Sheremetev Svetlana F.Mel'nikova Elizaveta S.Kokareva Ruslan E.nekrutenko Kirill V.Strizhenko Kyrill Yu Suponitsky Thanh Dat pham Alla n.Pivkina Valery P.Sinditskii Zelinsky Institute of Organic Chemistry Russian Academy of Sciences47 Leninsky ProspMoscow119991Russia Saint Petersburg State Institute of Technology 26 Moskovskii PrSt Petersburg190013Russia Mendeleev University of Chemical Technology Moscow125047Russia n.n.Semenov Federal Research Center for Chemical Physics Russian Academy of Sciences4 Kosygina Str119991MoscowRussia

Progress in the rocket industry is only possible on the basis of new, higher performance and more environmentally friendly materials compared to up-to-date propellant ingredients for liquid, solid, gelled and hybrid propellant systems. In this work, synthetic methods have been developed for the preparation of new energetic azofurazans bearing nitroxymethyl or azidomethyl groups. All prepared compounds were fully characterized by multinuclear nMR and IR spectroscopies, as well as elemental analyses. An analysis of the structural features based on the X-ray single-crystal diffraction made it possible to discuss their influence on the densities of the azofurazans of this study. Thermal decomposition and combustion of nitroxymethyl and azidomethyl azofurazans were studied using a number of complementary experimental techniques, namely thermogravimetry, differential scanning calorimetry, manometry, microthermocouple measurements in the combustion wave. The structural and physical characteristics of these new energetic analogues illustrate the extent to which the nature of the explosophoric groups can be used to tune the performace of the azofurazan framework. These azofurazans possess positive calculated enthalpy of formation and are promising candidates for new environmentally friendly energetic materials.

关键词： Azofurazan Azide nitrate ester X-ray Combustion

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Metal organic framework-combustion: A one-pot strategy to niO nanoparticles with excellent anode properties for lithium ion batteries

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Journal of Energy Chemistry 2018年第1期27卷 300-305页

作者： Vaiyapuri Soundharrajan Balaji Sambandam Jinju Song Sungjin Kim Jeonggeun Jo pham Tung Duong Seokhun Kim Vinod Mathew Jaekook Kim Department of Materials Science and Engineering Chonnam National University

niO nanoparticles with average particles size of 30 nm are synthesized using a one-pot metal–organic framework-combustion（MOF-C） technique, for use as an anode material in rechargeable lithium ion batteries（LIBs）. The structural and electronic properties of these nanoparticles are studied using various techniques, including powder X-ray diffraction（PXRD）, transmission electron microscopy（TEM）, scanning electron microscopy（SEM）, X-ray photoelectron spectroscopy（XPS）, and n_2 adsorption/desorption studies. The as-synthesized niO nanoparticles sustained reversible stable capacities of 748 and 410 mAh/g at applied current densities of 500 and 1000 m A/g, respectively, after 100 cycles. Furthermore, the anode displays a notable rate capability, achieving a stable capacity of ~200 mAh/g at a high current density of10 A/g. These results indicate that the size of the niO nanoparticles and their high surface area influence their electrochemical properties. Specifically, this combustion strategy is clearly favorable for improving the cyclability and rate capability of various metal oxides in rechargeable battery electrodes.

关键词： Metal-organic frameworks Combustion niO nanoparticles Lithium ion batteries High rate capability

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Indications for and techniques of keratoplasty at Vietnam national Institute of Ophthalmology

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International Journal of Ophthalmology(English edition) 2016年第3期9卷 379-383页

作者： pham ngoc Dong Truong nhu Han Anthony J.Aldave Hoang Thi Minh Chau Vietnam national Institute of Ophthalmology HanoiVietnam Stein Eye Institute the University of California Los Angeles CA 90095-7003 USA

AIM： To report the indications for and techniques of corneal transplantation at Vietnam national Institute of Ophthalmology （VnIO） over a period of 12y （2002-2013）, METHODS： Records of patients who had undergone corneal transplantation at VnIO from January 1, 2002 to January 1, 2014 were reviewed to determine the indication for and type of corneal transplant performed. Patient age, gender, indication for corneal transplantation and surgical technique were recorded and analyzed. RESULTS： Corneal transplantation were underwent in 1390 eyes of 1278 patients with a mean age of 44.9±18.1y during the period under review. The most common indication was infectious corneal ulcer （n=670; 48.2%）, followed by corneal scar （n=333, 24.0% ）, corneal dystrophy （n=138, 9.9%） and failed graft （n=112, 8.1%）. nearly all procedures performed were penetrating keratoplasty （n=1300, 93.5% ）, with a few lamellar keratoplasty procedures performed： lamellar keratoplasty （n=52, 3.7%）, Descemet＇s stripping automated endothelial keratoplasty （n =27, 1.9% ） and deep anterior lamellar keratoplasty （n =11, 0.8%）.COnCLUSIOn： While the most common indication for keratoplasty was infectious keratitis, nearly all indications for corneal transplantation were managed with penetrating keratoplasty, However, lamellar keratoplasty techniques, including deep anterior lamellar keratoplasty and Descemet＇s stripping automated endothelial keratoplasty, are being performed with increasing frequency for isolated stromal and endothelial disorders, respectively,

关键词： penetratingkeratoplasty, lamellarkeratoplasty endothelial keratoplasty indication for keratoplasty technique of keratoplasty

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Trace of the Wishart Matrix and Applications

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Open Journal of Statistics 2015年第3期5卷 173-190页

作者： T. pham-Gia Dinh n. Thanh Duong T. Phong Université de Moncton Moncton Canada University of Science Hochiminh City Vietnam Ton Duc Thang University Hochiminh City Vietnam

The trace of a Wishart matrix, either central or non-central, has important roles in various multi-variate statistical questions. We review several expressions of its distribution given in the literature, establish some new results and provide a discussion on computing methods on the distribution of the ratio: the largest eigenvalue to trace.

关键词： Trace Wishart Matrix Sphericity Latent Roots A-Hypergeometric Functions Humbert Function

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光谱法与分子模拟技术研究杨梅素与牛血清白蛋白的相互作用

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化学学报 2012年第2期70卷 143-150页

作者：李悦谷雨何佳何华周祎 Chuong pham-Huy 中国药科大学分析化学教研室南京210009 中国药科大学天然药物国家重点实验室南京210009 Faculty of Pharmacy University of Paris V4 avenue de 1'Observatoire75006 ParisFrance

利用紫外光谱、荧光光谱、红边激发荧光位移(REES)法、圆二色谱(CD)结合分子模拟技术共同研究了模拟生理条件下杨梅素与牛血清白蛋白(BSA)的相互作用,阐述了相互作用机制.分子模拟结果表明,杨梅素与蛋白在亚结构域II A的疏水腔内结合,... 详细信息

利用紫外光谱、荧光光谱、红边激发荧光位移(REES)法、圆二色谱(CD)结合分子模拟技术共同研究了模拟生理条件下杨梅素与牛血清白蛋白(BSA)的相互作用,阐述了相互作用机制.分子模拟结果表明,杨梅素与蛋白在亚结构域II A的疏水腔内结合,主要作用力为疏水作用力和氢键.依据荧光猝灭法判断猝灭机制为静态猝灭,并得到不同温度下药物与蛋白相互作用的结合常数(Ka)及结合位点数(n),根据热力学参数判断出作用力类型,并且计算出杨梅素与蛋白的结合距离,与分子模拟得到的判定结果基本一致.通过紫外光谱、同步荧光光谱以及REES法获得的信息讨论了相互作用时BSA中色氨酸(Trp)微环境的变化;并利用CD谱的测定结果定量计算了BSA二级结构中α-螺旋含量的变化.

关键词：分子模拟光谱法杨梅素牛血清白蛋白相互作用

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Hybrid Procedure Utilizing Stent Grafts to Stabilize Distal Flaps after Common and Superficial Femoral Endarterectomy

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Surgical Science 2015年第3期6卷 109-115页

作者： David V. pham Bogdan Protyniak Samuel Hui Ryan n. Cappa George Constantinopoulos Department of Surgery Monmouth Medical Center Long Branch USA School of Medicine St. George’s University St. George’s Grenada

Background: Endarterectomy has long been the standard for common femoral artery (CFA) occlusive disease. Hybrid procedures utilizing endovascular and open techniques have recently been used for revascularization. The purpose of this study was to evaluate the effectiveness of the use of a stent graft to stabilize the distal flap and prevent further dissection after extensive endarterectomy. Methods: All patients from Monmouth Medical Center in Long Branch, nJ from September 2008 to March 2013 who underwent an extensive common and superficial femoral (SFA) endarterectomy combined with the use of a Viabahn (Gore Medical) stent graft to stabilize the distal flap were included in the study. These stents were deployed in the proximal SFA after extensive endarterectomy, under direct visualization, without the aid of fluoroscopy. Due to the location in the SFA, these flaps were not amenable to suture tacking. Results: Fifteen patients met these criteria and were included in our study. Twelve patients underwent femoral endarterectomy for severe claudication and three patients for limb salvage. Technical success was achieved in all 15 patients. Five patients also had stents placed proximally to increase inflow and one patient had an additional stent placed distally to improve outflow. There were no intraoperative or postoperative complications. Conclusion: Stent graft placement allows a more extensive endarterectomy to be performed by stabilizing the distal flap allowing a safe transition into the true lumen that is not possible with suture tacking.

关键词： Common Femoral Endarterectomy Superficial Femoral Endarterectomy Stent Graft Distal Flap Vollmar Ring Dissector Viabahn Stent

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糖尿病肾病大鼠原代肾小管上皮细胞的提取及体外培养

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广西医学 2024年第4期46卷 535-542页

作者：王慧玲黄国东陈宇刘少芳王龙龙范氏泰和广西中医药大学附属国际壮医医院肾病科广西南宁市530201 广西中医药大学研究生院广西南宁市530200

目的探讨糖尿病肾病(Dn)大鼠原代肾小管上皮细胞(RTECs)的提取及体外培养方法。方法取SD雄性大鼠25只,随机分为正常组(n=5)和模型组(n=20)。对模型组大鼠构建Dn大鼠模型,不给予正常组任何处理。获取两组大鼠双肾组织,一部分组织用于HE... 详细信息

目的探讨糖尿病肾病(Dn)大鼠原代肾小管上皮细胞(RTECs)的提取及体外培养方法。方法取SD雄性大鼠25只,随机分为正常组(n=5)和模型组(n=20)。对模型组大鼠构建Dn大鼠模型,不给予正常组任何处理。获取两组大鼠双肾组织,一部分组织用于HE染色及Masson染色以观察肾组织结构,另一部分用于RTECs的提取及培养。RTECs的提取、培养方法:将肾皮质组织在80目筛网上研磨,经100目筛网过滤、Ⅰ型胶原酶消化25 min后,使用含10%胎牛血清、1%胰岛素⁃转铁蛋白⁃硒⁃乙醇胺添加剂和1%青链霉素双抗溶液的DMEM/F-12完全培养基培养细胞。用免疫荧光染色法检测细胞角蛋白18的表达情况以鉴定所获得的细胞。结果(1)建模后模型组大鼠出现多饮、多食、多尿、体重下降、血糖升高等特征,尿蛋白定性呈阳性,肾组织病理检测提示肾小球结构不完整且出现明显缺损,RTECs明显肿胀、变性,肾小管管腔萎缩,肾小管间质纤维化严重。(2)培养72 h后,两组RTECs均已经贴壁并呈岛屿状聚集生长,培养5~8 d后细胞呈多边鹅卵石样。模型组RTECs高表达细胞角蛋白18,阳性率>95%。结论采用在80目筛网上研磨、100目筛网过滤、Ⅰ型胶原酶消化25 min的方法可以得到数量较多、活性良好、纯度较高的Dn大鼠模型RTECs,且在形态与贴壁情况方面与正常大鼠RTECs无明显差异。

关键词：糖尿病肾病肾小管上皮细胞原代细胞细胞提取细胞鉴定大鼠

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Real-Time Optimization of Irrigation Scheduling in Agriculture 25th

Real-Time Optimization of Irrigation Scheduling in Agricultu...

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第25届中国控制与决策会议

作者： M.H.pham S.K.Saleem n.Okello national ICT Australia （nICTA） Department of Electrical and Electronic Engineering University of Melbourne

ISBN: (纸本)9781467355339

A simulation optimization approach is developed for managing irrigation operations in agriculture. The approach combines a highly complex crop growth and yield simulation model with an optimization algorithm to calculate an irrigation sequence that maximizes crop yield. The approach overcomes the limitations of many existing irrigation scheduling optimization methods that rely on simpler but more inaccurate crop growth and yield models to ensure computational tractability. The performance of the approach is demonstrated through simulation.

关键词： Optimization simulations of biological systems irrigation scheduling dynamical model FAO Crop Model (AquaCrop).

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Synthesis and characterization of naYF4:Yb3+,Er3+@silica-n=folic acid nanocomplex for bioimaginable detecting MCF-7 breast cancer cells

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Journal of Rare Earths 2019年第11期37卷 1183-1187页

作者： Ha Thi Phuong Tran Thu Huong Le Thi Vinh Hoang Thi Khuyen Do Thi Thao nguyen Thanh Huong pham Thi Lien Le Quoc Minh Institute of Materials Science Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Graduate University of Science and Technology-Vietnam Academy of Science and Technology 18 Hoang Quoc VietCau GiayHanoiViet Nam Department of Chemistry Hanoi Medical University1-Ton That TungDong DaHanoiViet Nam Department of Chemistry Hanoi University of Mining and Geology18-Pho LienBac Tu LiemHanoiViet Nam Institute of Biotechnology Vietnam Academy of Science and Technology18-Hoang Quoc VietCau GiayHanoiViet Nam Duy Tan University K7/25 Quang TrungDa NangViet Nam

Upconversion nanophosphors are new promising nanomaterials to be used as biolabels for detection and imaging of cancer *** nanophosphors absorb long-wavelength excitation radiation in the infrared or near infrared region and emit shorter wavelength,higher energy radiation from ultraviolet to *** this paper,we studied the hydrothermal method and optical properties of the functionalized naYF4:Yb^3+,Er^3+for biomedical *** synthesis,these naYF4:Yb^3+,Er^3+nanophosphors were functionalized with aminosilanes and folic *** acid binds to the folate receptor on the surface of MCF-7 breast cancer cells and this binding promotes internalization of the nanophosphors via *** sizes of the functionalized naYF4:Yb^3+,Er^3+@silica-n=FA(folic acid)nanophosphors can be controlled with length of the rod about 300-800 nm and diameter of the rod about 100-200 *** structure of naYF4:Yb^3+,Er^3+is in hexagonal crystal *** photo luminescence(PL)spectra of the functionalized naYF4:Yb^3+,Er^3+@silica-n=FA nanophosphors were *** nanophosphors emit in red color with the strongest band at 650 nm under 980 nm *** result can provide naYF4:Er^3+,Yb^3+@silica-n=FA complex for developing fluorescence label and image tool in cancer biology and medicine.

关键词： Upconversion luminescence naYF4:Yb^3+,Er^3+ nanophosphors Bioimaging Cancer cell Rare earths

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Sustainable Construction --An International Comparison of Civil Engineering Students

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Journal of Civil Engineering and Architecture 2012年第12期6卷 1648-1653页

作者： Thanh Trung Le Chris Ian Goodier Hanh Huu pham Marios n. Soutsos Kien Ton Tong School of Civil and Building Engineering Loughborough University Leicestershire LE112NS UK Department of Building Materials National University of Civil Engineering (NUCE) Hanoi 111110 Vietnam School of Planning Architecture and Civil Engineering Queen's University Northern Ireland BT9 5AG UK

Sustainable construction in the future will be influenced significantly by the beliefs and actions of civil engineering students studying at university today. A comparative investigation of the appreciation and attitudes regarding sustainable construction of civil engineering students at The nUCE （national University of Civil Engineering） in Vietnam, and the Universities of Loughborough and Liverpool in the UK were therefore conducted. Results indicate that students at all three universities appreciate the importance of the development of sustainable construction and have positive attitudes with regards to sustainability. Construction design and appropriate use of materials were two issues generally considered the most important with regards to sustainability, but were also thought to be adequately covered on the courses in all three institutions.

关键词： Sustainable construction education sustainability civil engineering Vietnam UK.

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