171,883 research outputs found
Fe2O3/NGr@C- and Co–Co3O4/NGr@C-catalysed hydrogenation of nitroarenes under mild conditions
No full textAn improved hydrogenation of nitroarenes using nano-structured iron- and cobalt-based catalysts is
presented. Modifications of the heterogeneous catalysts by N-doped graphene-flakes are crucial for the
success of selective reductions. The use of polar solvents and basic additives has a significant positive influence
on the rate of reduction of nitroarenes. This allows performing non-noble metal-catalysed hydrogenations
under very mild reaction conditions (e.g. 70 °C and 20 bar). On the basis of the obtained catalytic
results a heterolytic mechanism for the hydrogenation process is postulated, to
Local Structure of Nuclear C*-Algebras
No full text100 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009.The purpose of this work is to provide a clearer picture between traditional approximation properties of C*-algebras and the recent local approximations, via operator spaces, of nuclear C*-algebras introduced by Junge, Ozawa and Ruan. Our main objects of study are the C*-algebras with OL equal to 1. In particular we construct new relationships between C*-algebras with OL equal to 1 and strong NF algebras. We also show the absence of equivalence between C*-algebras with OL equal to 1 and nuclear quasidiagonal C*-algebras.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD
Local Structure of Nuclear C*-Algebras
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Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDsThe purpose of this work is to provide a clearer picture between traditional approximation properties of C*-algebras and the recent local approximations, via operator spaces, of nuclear C*-algebras introduced by Junge, Ozawa and Ruan. Our main objects of study are the C*-algebras with OL equal to 1. In particular we construct new relationships between C*-algebras with OL equal to 1 and strong NF algebras. We also show the absence of equivalence between C*-algebras with OL equal to 1 and nuclear quasidiagonal C*-algebras.Restricted to the U of I community idenfinitely during batch ingest of legacy ETDsU of I Only100 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009
Diffusion Barriers for Protons at the External Surface of Thylakoids
No full textLight induced electron transfer across photosynthetic membranes of higher plants is coupled with proton translocation from the outer phase into the lumen of thylakoids. The primary photochemical charge separation in PSII transfers one electron to special plastoquinone molecules Q and R which act in series (H.H. Stiehl, H.T. Witt, 1968, 1969; B.A. Diner,1977; B.R. Velthuys, J. Amesz, 1974; B. Bouges-Bocquet, 1973). R stores two electrons and mediates electron transfer into the plastoquinone pool (B.R. Velthuys, J. Amesz, 1974
Building a database of plant protecting agents for aquaponic systems - basic concepts
No full textThe paper gives an overview on the progress of the construction of a database of the pesticides that pose minimum risk when applied in an aquaponic system. Aquaponics is a developing food production system that integrates recirculating aquaculture (raising fish and other aquatic animals in closed systems) and hydroponics (plant production in water culture without soil) by using the fish waste as plant nutrient. Fish are highly sensitive to their environment, especially toxic chemicals: pesticides and other pest-controlling agents causing minimum perturbation in aquaponic systems have to be selected with an ecotoxicological approach
Atemlos übers Gebirg 35 Jahre Junge Kantorei 1961 - 1996 ; zum 65. Geburtstag von Joachim C. Martini
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Was erwarten junge Mädchen heute vom Sportverein?
No full textKleindienst-Cachay C, Gantenbein M. Was erwarten junge Mädchen heute vom Sportverein? Sport-Journal. 1991;17(11):4-5
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