نتایج جستجو برای: proton exchange

تعداد نتایج: 250490  

Journal: :Chemical communications 2014
Na Zhang Baolong Wang Yurong Zhang Fanzhe Bu Ying Cui Xuefeng Li Chengji Zhao Hui Na

Functionalized graphene oxide (FGO) reinforced quaternized poly(ether ether ketone) membranes were prepared for high temperature proton exchange membrane applications. The introduction of FGO significantly improved the mechanical strength and oxidative stability of these membranes at a high doping level. These reinforced membranes showed high tensile strength up to 40 MPa and high proton conduc...

2002
Stanley J. Brodsky Dae Sung Hwang Ivan Schmidt

Recent measurements from the HERMES and SMC collaborations show a remarkably large azimuthal single-spin asymmetries AUL and AUT of the proton in semi-inclusive pion leptoproduction γ∗(q)p → πX. We show that final-state interactions from gluon exchange between the outgoing quark and the target spectator system lead to single-spin asymmetries in deep inelastic lepton-proton scattering at leading...

Journal: :Endocrinology 2001
A Santhanagopal P Chidiac W C Horne R Baron S J Dixon

Two isoforms of the calcitonin receptor are expressed in rabbit: the common C1a isoform and the calcitonin receptor Delta e13 isoform, which has a deletion in the seventh transmembrane domain. Using microphysiometry, we investigated the effects of calcitonin on proton efflux from HEK293 cells stably transfected with C1a, calcitonin receptor Delta e13, or empty vector. In C1a-expressing cells on...

2008
K. Nakayama A. Szczurek C. Hanhart J. Speth

The production of ω-mesons in proton-proton collisions for proton incident energies up to 2.2 GeV is investigated within a mesonexchange model of hadronic interactions. We find a large cancellation between the dominant πρω meson-exchange current and nucleonic current contributions. A comparison with preliminary data from SATURNE calls for the inclusion of off-shell form factors at the NNω and π...

2000
MOHAMED MAHMOUD NASEF HAMDANI SAIDI HUSSIN MOHD NOR

Proton exchange membranes were prepared by radiation-induced grafting of styrene onto commercial poly(tetrafluoroethylene-co-hexafluoropropylene) films using a simultaneous irradiation technique followed by a sulfonation reaction. The resulting membranes were characterized by measuring their physicochemical properties such as water uptake, ion exchange capacity, hydration number, and proton con...

Journal: :Proceedings of the National Academy of Sciences 1994

Journal: :Energies 2022

Fuel cells (FCs) have received huge attention for development from lab and pilot scales to full commercial scale. This is mainly due their inherent advantage of direct conversion chemical energy electrical as a high-quality supply and, hence, higher efficiency. Additionally, FCs been produced at wide range capacities with high flexibility modularity characteristics. Using the right materials ef...

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