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排序方式: 共有111条查询结果,搜索用时 31 毫秒
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Dimitrios E. Panayotounakos Anastasia B. Sotiropoulou Nikos B. Sotiropoulos Manos Manios 《International Journal of Non》2007,42(1):157-163
Two kinds of second-order non-linear ordinary differential equations (ODEs) appearing in mathematical physics and non-linear mechanics are analyzed in this paper. The one concerns the Kidder equation in porous media and the second the gas pressure diffusion equation. Both these equations are strongly non-linear including quadratic first-order derivatives (damping terms). By a series of admissible functional transformations we reduce the prescribed equations to Abel's equations of the second kind of the normal form that they do not admit exact analytic solutions in terms of known (tabulated) functions. According to a mathematical methodology recently developed concerning the construction of exact analytic solutions of the above class of Abel's equations, we succeed in performing the exact analytic solutions of both Kidder's and gas pressure diffusion equations. The boundary and initial data being used in the above constructions are in accordance with each specific problem under considerations. 相似文献
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Theerthankar Das Shekh Sabir Ren Chen Jessica Farrell Frederik H. Kriel Gregory S. Whiteley Trevor O. Glasbey Jim Manos Mark D. P. Willcox Naresh Kumar 《Molecules (Basel, Switzerland)》2022,27(4)
Quorum-sensing (QS) systems of Pseudomonas aeruginosa are involved in the control of biofilm formation and virulence factor production. The current study evaluated the ability of halogenated dihydropyrrol-2-ones (DHP) (Br (4a), Cl (4b), and F (4c)) and a non-halogenated version (4d) to inhibit the QS receptor proteins LasR and PqsR. The DHP molecules exhibited concentration-dependent inhibition of LasR and PqsR receptor proteins. For LasR, all compounds showed similar inhibition levels. However, compound 4a (Br) showed the highest decrease (two-fold) for PqsR, even at the lowest concentration (12.5 µg/mL). Inhibition of QS decreased pyocyanin production amongst P. aeruginosa PAO1, MH602, ATCC 25619, and two clinical isolates (DFU-53 and 364707). In the presence of DHP, P. aeruginosa ATCC 25619 showed the highest decrease in pyocyanin production, whereas clinical isolate DFU-53 showed the lowest decrease. All three halogenated DHPs also reduced biofilm formation by between 31 and 34%. The non-halogenated compound 4d exhibited complete inhibition of LasR and had some inhibition of PqsR, pyocyanin, and biofilm formation, but comparatively less than halogenated DHPs. 相似文献
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Jiawei Zhu Zitao Chen Minghao Xie Zhiheng Lyu Miaofang Chi Manos Mavrikakis Wanqin Jin Younan Xia 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(22):7322-7326
We report a highly active and durable water oxidation electrocatalyst based on cubic nanocages with a composition of Ir44Pd10, together with well‐defined {100} facets and porous walls of roughly 1.1 nm in thickness. Such nanocages substantially outperform all the water oxidation electrocatalysts reported in literature, with an overpotential of only 226 mV for reaching 10 mA cm?2geo at a loading of Ir as low as 12.5 μgIr cm?2 on the electrode in acidic media. When benchmarked against a commercial Ir/C electrocatalyst at 250 mV of overpotential, such a nanocage‐based catalyst not only shows enhancements (18.1‐ and 26.2‐fold, respectively) in terms of mass (1.99 A mg?1Ir) and specific (3.93 mA cm?2Ir) activities, but also greatly enhanced durability. The enhancements can be attributed to a combination of multiple merits, including a high utilization efficiency of Ir atoms and an open structure beneficial to the electrochemical oxidation of Ir to the active form of IrOx. 相似文献
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Brandon J. O'Neill David H. K. Jackson Anthony J. Crisci Carrie A. Farberow Fengyuan Shi Ana C. Alba‐Rubio Junling Lu Paul J. Dietrich Xiangkui Gu Christopher L. Marshall Peter C. Stair Jeffrey W. Elam Jeffrey T. Miller Fabio H. Ribeiro Paul M. Voyles Jeffrey Greeley Manos Mavrikakis Susannah L. Scott Thomas F. Kuech James A. Dumesic 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2013,125(51):14068-14068