Sponser's Link

Archives

Live Feeds

Visitor Counter

SEARCH BOX

Showing posts with label nanoscale. Show all posts

The objectives of the Nanotoxicology Specialty  are to:
  • Serve as the focal point for interaction of members of the Society of Toxicology interested in "Nanotoxicology."
  • Facilitate discussion of the appropriate design of toxicological studies for evaluating the toxicity of nanoscale materials.
  • Facilitate discussion (e.g., through symposia) of the most appropriate dosimetrics for evaluating nanoscale materials in vitro and in vivo.
  • Facilitate discussion of the most appropriate and validated screening tests for evaluating the toxicity of nanoscale materials and for extrapolating the findings from in vitro studies to in vivo exposures.
  • Facilitate discussion regarding the data required for conducting risk assessments of nanoscale materials in the future, addressing the research required to fill data-gaps.
  • Facilitate the generation of position papers and review articles by nanotoxicology experts regarding relevant subjects such as dosimetrics, metrology, in vitro toxicity, in vivo toxicity, and risk assessment.
  • Conduct educational programs and activities that emphasize current developments and issues in nanotoxicology.
  • Relate the developments in nanotoxicology to the activities of the Society of Toxicology and to the toxicology/environmental health sciences community-at-large, with the goal of stimulating interest and growth in nanotoxicology as it relates to the general science of toxicology.
  • Provide a national/international resource on matters relating to nanotoxicology.

Establishing an effective process for identifying and understanding the broad implications of nanotechnology for society will play a central role in making nanotechnology a success, as it will certainly affect the decisions of policymakers and regulatory agencies alike.Because truly transformative technologies have far-reaching consequences, they always generate controversy. Establishing an effective process for identifying and understanding the broad implications of nanotechnology will advance its acceptance and success, impact the decisions of policymakers and regulatory agencies, and facilitate the development of judicious policy approaches to new technology options.

Nanoscale: Issues and Perspectives for the Nano Century addresses the emerging ethical, legal, policy, business, and social issues. A compilation of provocative treatises, this reference:
  • Covers an area of increasing research and funding
  • Organizes topics in four sections: Policy and Perspectives; Nano Law and Regulation; Nanomedicine, Ethics, and the Human Condition; and Nano and Society: 
  • The NELSI Imperative Presents differing perspectives, with views from nanotechnology's most ardent supporters as well as its most vocal critics
  • Includes contributions from professionals in a variety of industries and disciplines, including science, law, ethics, business, health and safety, government regulation, and policy.
This is a core reference for professionals dealing with nanotechnology, including scientists from academia and industry, policy makers, ethicists and social scientists, safety and risk assessment professionals, investors, and others. It is also an excellent text for students in fields that involve nanotechnology.

Catalysis is one of the longest-established uses for nano particles. Aluminium, iron, titanium dioxide, clays, and silica have all been used as catalysts in nanoparticle form for many years.
 
Nanocatalysis is a rapidly growing field which involves the use of nano materials as catalysts for a variety of homogeneous and heterogeneous catalysis applications. Heterogeneous catalysis represents one of the oldest commercial practices of nanoscience; nanoparticles of metals, semiconductors, oxides, and other compounds have been widely used for important chemical reactions.

Although surface science studies have contributed significantly to our fundamental understanding of catalysis, most commercial catalysts, are still produced by "mixing, shaking and baking" mixtures of multi-components; their nanoscale structures are not well controlled and the synthesis-structure-performance relationships are poorly understood. Due to their complex physico-chemical properties at the nanometer scale, even characterization of the various active sites of most commercial catalysts proves to be elusive.

Application 

Green diesel production using Fischer-Tropsch Synthesis (FTS)
 Process Improvements: 
  • Improving the FTS technology for production of high molecular weight waxes, followed by their hydrocracking to generate liquid fuels 
  • Improved efficiency of slurry and fixed-bed reactors, used in FTS from biosyngas 
  • Produce long, linear-chain paraffin waxes in fixed bed & slurry FTS reactors
    Catalyst.
  • Nano Fe and Co powders (10-50 nm) are used as FTS catalysts in slurry reactors, promoted by other metals like Mn, Cu & alkalis 
  • Produced by thermal plasma chemical vapor deposition (TPCVD) and cluster spray techniques 
  • Minimize liquid-solid diffusion resistance 
  • Multi-walled carbon nanofilaments (MWCNF), produced by CO2 sequestration via dry reforming for gas-to-liquid FTS, with the iron carbide content rendering catalytic activity.

Sponser's Link