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Neurotoxicity and Neurodegeneration:Local Effect and Global Impact--13th International Neurotoxicology Association Meeting & 11th International Symposium on Neurobehavioral Methods and Effects in Occupational and Environmental Health

作者： pamela j.lein Molecular Bioscience University of CaliforniaDavisCAUSA

purpose: Organophosphorus pesticides(Ops) are the most commonly used pesticides *** human and experimental animal studies clearly identify neurotoxicity as the primary endpoint of concern. Inhibition of the hydrolytic... 详细信息

关键词： In vitro endpoints of relevance to organophosphorus pesticide-induced neurobehavioral deficits

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Ternary Ni-Co-Fe oxyhydroxide oxygen evolution catalysts:Intrinsic activity trends,electrical conductivity,and electronic band structure

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Nano Research 2019年第9期12卷 2288-2295页

作者： Michaela Burke Stevens Lisa j. Enman Ester Hamal Korkus jeremie Zaffran Christina D. M. Trang james Asbury Matthew G. kast Maytal Caspary Toroker Shannon W. Boettcher Department of Chemistry & Biochemistry and the Materials Science Institute University of OregonEugeneOR 97403USA Department of Materials Science & Engineering and The Nancy & Stephen Grand Technion Energy program Technion Israel Institute of TechnologyHaifa 3200003Israel

Nickel-,cobalt-,and iron-based(oxy)hydroxides comprise the most-commonly studied electrocatalysts for the oxygen-evolution reaction(OER)in alkaline solution.A fundamental understanding of composition-structure-activity relationships for mixed-metal Ni-Co and Ni-Co-Fe(oxy)hydroxides is important to guide the design of advanced OER *** we use cyclic voltammetry,chronopotentiometry,inductively-coupled plasma-optical emission spectroscopy,and in situ electrical conductivity measurements to characterize the properties and activity of various compositions of Ni-Co-Fe(oxy)hydroxides prepared by cathodic *** with previous studies,we find Fe is essential for the mixed-metal(oxy)hydroxides to achieve high OER *** the rigorous absence of Fe(achieved by using specially cleaned electrolytes),the most-active Ni-Co(oxy)hydroxide composition has an OER turn-over frequency only twice that ofpure Co(oxy)hydroxide,suggesting minimal synergism between the two *** addition of Co to Ni-Fe(oxy)hydroxides shifts the onset of electrical conductivity to lower potentials,but has little effect on the intrinsic OER activity,with the most-active Ni-Co-Fe(oxy)hydroxide having an OER turn-over frequency only -1.5 times that of the Ni-Fe(oxy)*** magnitudes of the electrical conductivities are similar for all the compositions ***-functional-theory-calculated projected density of states show a significant contribution of all chemical elements at the valence band edge of the mixed-metal oxyhydroxide electronic structure,demonstrating significant electronic hybridization between the *** calculations suggest the involvement of all the elements in modulating the electronic structure at putative Fe-based active sites that are probably located at edges or defects in the two-dimensional oxyhydroxide sheets.

关键词： electrocatalysis heterogeneous catalysis water electrolysis oxygen evolution density functional theory

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Unconditionally Secure Multi-Secret Sharing Scheme

Unconditionally Secure Multi-Secret Sharing Scheme

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2012 IEEE International Conference on Computer Science and Automation Engineering（CSAE 2012）

作者： lein Harn Department of Computer Science Electrical Engineering University of Missouri-Kansas City

In Shamir’s（t,n）secret sharing（SS）scheme,a master secret s is divided into n shares by a dealer and is shared among n shareholders in such a way that any t or more than t shares can reconstruct this master secret;but fewer than t shares cannot obtain any information about the master secret *** Shamir’s scheme is unconditionally secure,it unfortunately requires a large data expansion（i.e.,t shares are needed to reclaim one secret）.Therefore,Shamir’s scheme is inefficient as a conveyor of ***-secret sharing（MSS）scheme,which allows multiple master secrets to be shared among shareholders,has been proposed to improve the efficiency of Shamir’s ***,all existing MSS schemes are computationally *** this paper,we propose an unconditionally secure MSS scheme based on Shamir’s *** proposed MSS scheme allows each shareholder to keep only one private share and uses it to share t master secrets.

关键词： Secret sharing multi-secret sharing secret shar- ing homomorphism unconditional security

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