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31.
Mirjafari A Murray SM O'Brien RA Stenson AC West KN Davis JH 《Chemical communications (Cambridge, England)》2012,48(60):7522-7524
Ionic liquids of cations bearing two lipid-like aliphatic tails are shown to have values of T(m) that can be very low, and that can be tuned up or down by the addition, deletion, or combination of dipolar modules and side-chain double bonds. 相似文献
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Employing acoustic emission sensors for detection of partial discharge, PD, introduces many advantages. Besides easy installation and replacement, they are non-invasive and immune to electromagnetic noise and interference and their sensitivity does not vary with object capacitance. For PD allocating utilizing AE sensors, distance calculations are based on the arrival time of acoustic waves to the sensors. Considering structure-borne waves of higher speed, the peaks of some of indirect path AE signals with significant contribution are mistakenly considered as peaks of direct path AE signals. Furthermore, the acoustic signals are propagating through certain parts of the transformer, such as the windings, and this complicates the partial discharge detection and allocation. These would imply an incorrect distance between the source and sensor. A method based on a heuristic algorithm has been proposed which considering all possible indirect paths with the relevant propagation times and all the barriers on the travel path of acoustic signal, calculates the more precise arrival times to sensors. A test chamber has been utilized and artificial PD signals are produced at various points. Output results of algorithm have been compared with results of classic method. It has been shown that proposed method significantly reduces the positioning errors. 相似文献
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Arsalan Wares 《International Journal of Mathematical Education in Science & Technology》2013,44(6):814-819
This note describes two conjectures pertaining to repeated partitioning of an arbitrary triangle. The first conjecture turns out to be true, and hence gives rise to a new, more general, conjecture that is also addressed in this article. Both conjectures can be explored in a dynamic geometry environment. The proofs to the conjectures addressed in this article require knowledge of high school Euclidean geometry. 相似文献
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Basit Muhammad Abdul Tariq Zeeshan Zahid Saira Khan Sheheryar Siddiqui Farrukh Arsalan Khan Muhammad Farooq Ali Gohar Park Tae Joo 《Journal of Cluster Science》2022,33(6):2443-2454
Journal of Cluster Science - Successive ionic layer adsorption and reaction (SILAR) process has been diversely used for deposition of various metal chalcogenides. SnS is one of them. Owing to the... 相似文献
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Adeel Arsalan Iqbal Ahmad Syed Abid Ali Kiran Qadeer Shaukat Mahmud Fozia Humayun Anwar Ejaz Beg 《国际化学动力学杂志》2020,52(3):207-217
Cyanocobalamin (B12) is a photosensitive vitamin, and its photodegradation to hydroxocobalamin (B12b) in liposomes has been investigated. The values of apparent first-order rate constants (kobs) for the photodegradation of B12 in liposomes (nine preparations) are in the range of (0.52-2.24) × 10–3 min–1, compared to 3.21 × 10–3 min–1 for B12 in aqueous solution (pH 5.0). The entrapment efficiency of B12 in liposomes is 26.4-38.8%. The values of kobs show a linear relation with phosphatidylcholine (PC) content in liposomes, indicating the influence of PC in inhibiting the rate of photolysis of B12. The value of the bimolecular rate constant for photochemical interaction of B12 and PC is 0.32 M–1 min–1, indicating the stabilizing effect of PC on the photolysis of B12. The ratio of B12 stabilization in liposomal preparations is in the range 2-6 compared to that of the unentrapped vitamin The stabilization of B12 is mediated by a photoinduced charge-transfer B12-PC complex that leads to the reduction of B12 to B12r, which is then oxidized to B12b that has low susceptibility to photolysis. The extent of stabilization of B12 probably depends on the degree of interaction between the two compounds under the reaction conditions, indicated by the loss of B12 fluorescence. 相似文献
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Arsalan Wares 《International Journal of Mathematical Education in Science & Technology》2018,49(1):153-159
The purpose of this paper is to provide examples of ‘non-traditional’ proof-related activities that can explored in a dynamic geometry environment by university and high school students of mathematics. These propositions were encountered in the dynamic geometry environment. The author believes that teachers can ask their students to construct proofs for these propositions. 相似文献
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Svetlana V. Martynovskaya Arsalan B. Budaev Igor A. Ushakov Tatyana N. Borodina Andrey V. Ivanov 《Molecules (Basel, Switzerland)》2022,27(8)
This article shows that two extremely important families of fused heterocyclic assemblies, namely 6-methylbenzo[4,5]imidazo[1,2-a]pyrrolo[2,1-c]pyrazine and 5a-methyl-5a,6-dihydro-5H,12H-benzo[4,5]imidazo[1,2-a]pyrrolo[1,2-d]pyrazine, can be synthesized from only two available building blocks (N-allenylpyrrole-2-carbaldehyde and o-phenylenediamine) by controlling only one reaction parameter (water content of the medium). It should be emphasized that the latter class of compounds (with an a/d arrangement) is previously unknown. If the allene group is introduced not into the starting compound, but during the reaction (in superbase media), a heterocyclic ensemble, 5-methylbenzo[4,5]imidazo[1,2-a]pyrrolo[2,1-c]pyrazines, with a different position of the methyl group is formed. 相似文献
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Numerical Algorithms - In this paper, we consider product integration method based on orthogonal polynomials to solve mixed system of Volterra integral equations of the first and second kind with... 相似文献