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991.
Zitouni A. Remil G. Bouadjemi B. Benstaali W. Lantri T. Matougui M. Houari M. Aziz Z. Bentata S. 《JETP Letters》2020,112(5):290-298
JETP Letters - We have studied the structural, electronic, magnetic, and elastic properties of full-Heusler alloys Co2YPb (Y = Ti, V, Fe, and Mo) with the help of ab initio calculation using Full... 相似文献
992.
Semen S. Sologubov Alexey V. Markin Natalia N. Smirnova Elena S. Chamkina Irina Yu. Krasnova Sergey A. Milenin Olga A. Serenko Zinaida B. Shifrina Aziz M. Muzafarov 《Entropy (Basel, Switzerland)》2021,23(12)
The molar heat capacity of the first-generation hybrid dendrimer with a “carbosilane core/phenylene shell” structure was measured for the first time in the temperature range T = 6–600 K using a precise adiabatic vacuum calorimeter and DSC. In the above temperature interval, the glass transition of the studied compound was observed, and its thermodynamic characteristics were determined. The standard thermodynamic functions (the enthalpy, the entropy, and the Gibbs energy) of the hybrid dendrimer were calculated over the range from T = 0 to 600 K using the experimentally determined heat capacity. The standard entropy of formation of the investigated dendrimer was evaluated at T = 298.15 K. The obtained thermodynamic properties of the studied hybrid dendrimer were compared and discussed with the literature data for some of the first-generation organosilicon and pyridylphenylene dendrimers. 相似文献
993.
Dr. Arshad Hussain Hajera Gul Waseem Raza Dr. Salman Qadir Dr. Muhammad Rehan Dr. Nadeem Raza Aasif Helal Dr. M. Nasiruzzaman Shaikh Dr. Md. Abdul Aziz 《Chemical record (New York, N.Y.)》2024,24(4):e202300352
Recently, carbon neutrality has been promoted as a potentially practical solution to global CO2 emissions and increasing energy-consumption challenges. Many attempts have been made to remove CO2 from the environment to address climate change and rising sea levels owing to anthropogenic CO2 emissions. Herein, membrane technology is proposed as a suitable solution for carbon neutrality. This review aims to comprehensively evaluate the currently available scientific research on membranes for carbon capture, focusing on innovative microporous material membranes used for CO2 separation and considering their material, chemical, and physical characteristics and permeability factors. Membranes from such materials comprise metal-organic frameworks, zeolites, silica, porous organic frameworks, and microporous polymers. The critical obstacles related to membrane design, growth, and CO2 capture and usage processes are summarized to establish novel membranes and strategies and accelerate their scaleup. 相似文献
994.
Syed Shaheen Shah Sulayman Oladepo Muhammad Ali Ehsan Wissam Iali Asem Alenaizan Mohammad Nahid Siddiqui Munetaka Oyama Abdul-Rahman Al-Betar Md. Abdul Aziz 《Chemical record (New York, N.Y.)》2024,24(1):e202300105
Polyaniline (PANI) has piqued the interest of nanotechnology researchers due to its potential as an electrode material for supercapacitors. Despite its ease of synthesis and ability to be doped with a wide range of materials, PANI′s poor mechanical properties have limited its use in practical applications. To address this issue, researchers investigated using PANI composites with materials with highly specific surface areas, active sites, porous architectures, and high conductivity. The resulting composite materials have improved energy storage performance, making them promising electrode materials for supercapacitors. Here, we provide an overview of recent developments in PANI-based supercapacitors, focusing on using electrochemically active carbon and redox-active materials as composites. We discuss challenges and opportunities of synthesizing PANI-based composites for supercapacitor applications. Furthermore, we provide theoretical insights into the electrical properties of PANI composites and their potential as active electrode materials. The need for this review stems from the growing interest in PANI-based composites to improve supercapacitor performance. By examining recent progress in this field, we provide a comprehensive overview of the current state-of-the-art and potential of PANI-based composites for supercapacitor applications. This review adds value by highlighting challenges and opportunities associated with synthesizing and utilizing PANI-based composites, thereby guiding future research directions. 相似文献
995.
Dr. Muhammad Faheem Dr. Arshad Hussain Dr. Muhammad Ali Dr. Md. Abdul Aziz 《Chemical record (New York, N.Y.)》2024,24(1):e202300268
Aluminum-sulfur batteries (AlSBs) exhibit significant potential as energy storage systems due to their notable attributes, including a high energy density, cost-effectiveness, and abundant availability of aluminum and sulfur. In order to commercialize AlSBs, an understanding of their working principles is necessary. In this review, we examine the current advancements in cathodes, both in theory and practice, as well as the progress made in aqueous and nonaqueous electrolytes. We also explore the modifications made to separators and the theoretical understanding of problems associated with AlSBs. Furthermore, we discuss future research directions aimed at resolving these issues. Our aim is to summarize the current progress in AlSBs and, based on recent progress and understanding of the mechanism, help design a battery to overcome the challenges that such batteries have been facing. 相似文献
996.
XING Pei xiang TIAN Yan qing WANG Jun zuo NA Hui TANG Xin yi JIANG Bing zheng ** 《高等学校化学研究》1998,14(2):199-203
StudiesonLiquidCrystalineBis[4┐(p┐phenoxy)┐phenylbenzoate]Alkyldicarboxylate*XINGPei-xiang,TIANYan-qing,WANGJun-zuoNAHui,T... 相似文献
997.
HOU Jingguo HE TianXi MAO XueFeng LIU Huiling DU XinZheng NA PengJun DENG Hualing GAO JingZhang 《高等学校化学研究》2001,17(3)
The role played by DNA in molecular biology is clearly recognized to be vital to life on this planet. 8-oxo-7,8-dihydro-2deoxyguanosine(=8-OHdG), is probably the most important product of "oxidative stress” in DNA. Its concentration in DNA is, in fact. a quantitative analysis of the degree of DNA damage that an organism has undergone. Due to the importance of 8-OHdG of nucleic acidg in mutagenesis, carcinogenesis and aging, numerous chemical and biological investigations have been made on this subject in the past time. Kuchino and co-workers have found that 8-OHdG residue in DNA is misreading during the process of DNA replication. Recently, some reports have been presented on high 8-OHdG levels in patients suffering from various diseases such as chronic hepatitis, Fanconi s anemia, diabetes mellitus and Helicobacter pylori infections. As a result, 8-OHdG is a useful marker for the study of DNA damage arising from reactive oxygen species and is of great significance for cancer research. The 8-OHdG levels in DNA can help understand the mechanism of carcinogens and lead to more effective treatments for many different types of cancer. For these reasons, an analysis of 8-OHdG with quickness, low cost and high accuracy is required. 相似文献
998.
Effective Heuristics for the GPS Survey Network of Malta: Simulated Annealing and Tabu Search Techniques 总被引:1,自引:0,他引:1
A GPS network can be defined as a set of stations, co-ordinated by a series of sessions formed by placing receivers on the stations. This paper shows how to search for the best order in which to observe these sessions giving the cheapest schedule. The complexity of observing GPS networks increases with their size and become highly difficult to solve effectively. To obtain good methods to solve this problem a new area of research is implemented. This area is based on developed heuristic techniques that provide an optimal or near optimal solution for large networks. Comparing their outcome in terms of solution quality and computational effort proves the performance of the developed techniques. 相似文献
999.
采取亲核取代反应合成了含有羟端基和不含羟端基的两种线性联苯型聚醚醚酮(PEDEK)齐聚物,并采用MS,1HNMR,ICP,IR,DSC和WAXD等方法对齐聚物进行表征.研究发现,含羟端基的齐聚物因分子间存在氢键,其X射线衍射峰峰位和峰形与聚合物十分相似,而不含羟端基齐聚物的X射线衍射峰与聚合物相差较大. 相似文献
1000.