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Synthesis of surfactant-free electrostatically stabilized gold nanoparticles by plasma-induced liquid chemistry

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Keywords
  • <P>Plasma-Induced Non-Equilibrium Liquid Chemistry Is Used To Synthesize Gold Nanoparticles (Aunps)
  • The Morphology And Optical Properties Of The Synthesized Aunps Are Characterized By Transmission Ele
  • Plasma Processing Parameters Affect The Particle Shape And Size And The Rate Of The Aunp Synthesis P
  • Particles Of Different Shapes (E
  • G
  • Spherical
  • Triangular
  • Hexagonal
  • Pentagonal
  • Etc) Are Synthesized In Aqueous Solutions
  • In Particular
  • The Size Of The Aunps Can Be Tuned From 5 Nm To Several Hundred Nanometres By Varying The Initial Go
  • 5 Mu M To 1 Mm
  • In Order To Reveal Details Of The Basic Plasma-Liquid Interactions That Lead To Aunp Synthesis
  • We Have Measured The Solution Ph
  • Conductivity And Hydrogen Peroxide (H2O2) Concentration Of The Liquid After Plasma Processing
  • And Conclude That H2O2 Plays The Role Of The Reducing Agent Which Converts Au+3 Ionsto Au-0 Atoms
  • Leading To Nucleation Growth Of The Aunps
  • </P>
Disciplines
  • Biology
  • Medicine

Abstract

1 Ludwig Eichinger and Francisco Rivero (eds.), Dictyostelium discoideum Protocols, Methods in Molecular Biology 983, DOI 10.1007/978-1-62703-302-2_1, © Springer Science+Business Media, LLC 2013 Chapter 1 The Amoebozoa Christina Schilde and Pauline Schaap Abstract The model organism Dictyostelium discoideum is a member of the Amoebozoa, one of the six major divisions of eukaryotes. Amoebozoa comprise a wide variety of amoeboid and fl agellate organisms with single cells measuring from 5 μ m to several meters across. They have adopted many different life styles and sexual behaviors and can live in all but the most extreme environments. This chapter provides an overview of Amoebozoan diversity and compares roads towards multicellularity within the Amoebozoa with inven- tions of multicellularity in other protist divisions. The chapter closes with a scenario for the evolution of Dictyostelid multicellularity from an Amoebozoan stress response. Key words Amoebozoa , Protista , Aggregative multicellularity , Encystation , Sporulation , Morphogenesis , Cyclic AMP signaling , Phylogeny The Dictyostelids have fascinated biologists for over 150 years with their ability to assemble up to a million amoebas into a tactile migrating organism, which, after seeking out a site for spore dis- persal, transforms into a well-balanced fruiting structure. The development of a range of molecular genetic and cell biological procedures for the species Dictyostelium discoideum over the past 30 years has established this species as an important model organ- ism for the study of fundamental cell biological and developmental processes ( 1 ) . More recently, the evolution of social behavior and the study of genes associated with human diseases and bacterial infections have been added to the repertoire of research questions that can be addressed in Dictyostelia ( 2 ) . With putative applications of research in mind,

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