Iconocast Logo

Welcome To Iconocast

How to add a URL link from your web site to the Iconocast web sites

Virtual tour of Southern California

 

Recent News and Articles on the Keywords: new + synthesis + oxidation  Related to the article below (Last Update: 8/5/2008)

What's New in Orthopaedic Research
Journal of Bone and Joint Surgery (subscription) - Aug 1, 2008
8 reported that polyethylene oxidation was evident in forty SB CHARIT? III total disc replacements (DePuy Spine) that were retrieved at an average of 7.2 ...
Process for the Preparation of Vanillin from Agricultural
FLEXNEWS, France - Jul 15, 2008
The present invention provides a process for the preparation of Vanillin (4-hydroxy-3-methoxy benzaldehyde) by a single-step oxidation of ferulate moiety of ...
DOE to provide $36 mill to advance carbon dioxide capture
Electric Light & Power/ Utility Automation & Engineering T&D Magazine, OK - Aug 1, 2008
Investigators will focus on the synthesis, characterization, and testing of novel reversible ionic liquids, and then use structure/property relationships to ...
Ultra High Vacuum Scanning Electron Microscopy (UHV-SEM ...
Azom.com - Jul 24, 2008
Oxidation of the sample was a key problem, and the ultra high vacuum chamber was developed by VisiTec to expand the capabilities of UCLA?s nanostructure ...
Focus on the World Chitin & Chitosan Market
Market Wire (press release) - Jul 7, 2008
Product Overview II-4 Introduction to Biopolymers II-4 Applications of Biopolymers II-4 Degradation: No more a Problem with Biopolymers II-4 Synthesis of ...
Molecular Dynamics Simulations of the Photoactive Protein Nitrile ...
RedOrbit, TX - Jul 25, 2008
A good example of the advantages of using microorganisms in chemistry is the synthesis of acrylamide ( 1 ). Since 1985, Japanese companies have used ...
Clarke County Notebook, July 10
Clarke Times Courier, VA - Jul 9, 2008
... of how much tracer amino acid is oxidized to carbon dioxide and subsequently exhaled. It will also show how much is being used for protein synthesis. ...
Barclay; William R.; (Boulder, CO)
FLEXNEWS, France - Jul 25, 2008
Additionally, concentrations of trace metals, particularly those that exist in two or more valency states, and that possess suitable oxidation-reduction ...
Stay away from cholesterol drugs
BlueRidgeNow.com, NC - Jul 15, 2008
Children and adults will be deprived of healthy cell membranes, sex hormones, bile, carbohydrate metabolism, collagen synthesis, DNA, enzymes, immune health ...
MAPK Signaling Regulates Nitric Oxide and NADPH Oxidase-Dependent ...
RedOrbit, TX - Jul 23, 2008
The sources of NO synthesis in plants include reduction in nitrite by nitrate reductase (NR), oxidation of Arg to citrulline by NOS, and a nonenzymatic NO ...
Source: Google News

Insertion of specific bases during DNA synthesis past the oxidation-damaged base 8-oxodG -
S Shibutani, M Takeshita, AP Grollman - Nature, 1991 - nature.com
Insertion of specific bases during DNA synthesis past the oxidation-damaged base
8 ... Department of Pharmacological Sciences, State University of New York at ...

Revised effective ionic radii and systematic studies of interatomic distances in halides and … -
RD Shannon - Crystal Physics, Diffraction, Theoretical and General …, 1976 - Blackwell Synergy
... extensive synthesis within certain structure types, eg rocksalt, spinel, perovskite
and pyrochlore; (2) prepar- ation of new compounds with unusual oxidation ...

Steroids. LXXIII. 1a The Direct Oppenauer Oxidation of Steroidal Formate Esters. A New Synthesis of …
HJ Ringold, B L?ken, G Rosenkranz, F Sondheimer - Journal of the American Chemical Society, 1956 - pubs.acs.org
... A.] Steroids. LXXIII. la The Direct Oppenauer Oxidation of Steroidal Formate
Esters. A New Synthesis of 17cr-Hydroyprogesterone BY ...

Oxidation of N, N-Dialkyl Hydroxylamines with t-Butyl Hydroperoxide. A New Synthesis for Nitrones
HEDL Mare, GM Coppinger - The Journal of Organic Chemistry, 1963 - pubs.acs.org
... VOL. 28 Oxidation of N,N-Dialkyl Hydroxylamines with t-Butyl Hydroperoxide.
A New Synthesis for Nitrones H. E. DE LA MARE AND GM COPPIKGER ...

The Organometallic Chemistry of the Transition Metals -
RH Crabtree - New York, 1994 - doi.wiley.com
... Transition Metals Robert H Crabtree John Wiley and Sons, New York, 1992 ... Clusters
and the metal-metal bond; Applications to organic synthesis; Oxidation and high ...

… titanium silicate isomorphous to MCM-41 and its application as a catalyst for selective oxidation … -
A Corma, MT Navarro, JP Pariente - Journal of the Chemical Society, Chemical Communications, 1994 - rsc.org
... of Si by Ti during the synthesis of zeolites with MFI and MEL structures has generated
a new family of ... are able to perform the selective oxidation of organic ...

… synthesis in transgenic plants as a new tool to study carbon flow through ?-oxidation -
V Mittendorf, V Bongcam, L Allenbach, G Coullerez, … - The Plant Journal, 1999 - Blackwell Synergy
... Free Content. Full Text. Polyhydroxyalkanoate synthesis in transgenic plants
as a new tool to study carbon flow through ?-oxidation. ...

New synthesis of high-quality double-walled carbon nanotubes by high-temperature pulsed arc … -
T Sugai, H Yoshida, T Shimada, T Okazaki, H … - Nano Lett, 2003 - pubs.acs.org
... New Synthesis of High-Quality Double-Walled Carbon Nanotubes by ... optimum conditions
of the DWNT synthesis are almost ... DWNTs can be achieved by oxidation in air ...

[CITATION] … and Characterization of New Vanadium Phosphorus Oxide Catalysts for Partial n-Butane Oxidation to …
NH Batis, H Batis, A Ghorbel, JC Vedrine, JC Volta - J. Catal, 1991

CHOP induces death by promoting protein synthesis and oxidation in the stressed endoplasmic … -
SJ Marciniak, CY Yun, S Oyadomari, I Novoa, Y … - Genes & Development, 2004 - Cold Spring Harbor Lab
... To measure translation of new proteins within the membrane fraction ... 20 mM NEM to
block further protein synthesis and prevent ex vivo protein oxidation. ...

Source: Google Scholar

New oxidation methods streamline synthesis of important compounds
CHAMPAIGN, Ill. — One of the fundamental challenges facing organic synthesis in the 21st century is the need to significantly increase the efficiency with which carbon frameworks can be constructed and functionalized. Chemists at the University of Illinois are helping to meet this challenge by developing a class of carbon-hydrogen catalysts that are highly selective, reactive and tolerant of other functionality.

The catalysts also offer a new strategy for streamlining the synthesis of important compounds, including drugs and pharmaceuticals, by avoiding the functional group manipulations required for working with oxidized materials.

“We are creating a toolbox of catalytic reactions that allow us to go directly from a carbon-hydrogen bond to a carbon-oxygen bond or to a carbon-nitrogen bond,” said M. Christina White, a professor of chemistry at Illinois. “By offering fewer steps, fewer functional group manipulations and higher yields, this toolbox will change the way chemists make molecules.”
Currently, chemists must make molecules by beginning with something that is already oxidized. But, having to start with that functionality means it must be carried – and protected – throughout the entire synthetic sequence. And that costs reagents, time, money and manpower, in addition to being inherently inefficient.

“Unlike standard synthetic methods, we don’t have to carry the functionality throughout the entire sequence,” White said. “Instead, we carry latent functionality as a carbon-hydrogen bond. Then, at a late stage in the synthesis, we remove the hydrogen and replace it with oxygen or nitrogen – right where we need it for the next chemical reaction.”

In the June 13 issue of the Journal of the American Chemical Society, White and graduate student Kenneth J. Fraunhoffer describe the catalytic pathway they used to synthesize a derivative of the chemotherapeutic reagent acosamine. They were able to eliminate all of the functional group manipulations and cut by one-half the number of steps required, while maintaining the same purity and yield.

White has also used her catalyst to streamline the synthesis of a peptidase inhibitor drug candidate, a nucleotide-sugar L-galactose, and is currently working on the antibiotic erythromycin A.

White’s research is funded by the Henry Dreyfus Foundation, the A.P. Sloan Foundation, the University of Illinois, Merck Research Laboratories, the National Institutes of Health and the National Science Foundation.

Editor’s note: To reach M. Christina White, call 217-333-6173; e-mail: white@scs.uiuc.edu

To view or subscribe to the RSS feed for Science News at Illinois, please go to: http://webtools.uiuc.edu/rssManager/608/rss.xml.
 
 
 
Google
Web www.iconocast.com

Search inside Iconocast for the keyword you have in mind.

Iconocast has collected more than 50,000 articles and press releases on health and science.

These are current and most up to date press releases on the subject you are searching.

We collect current health and science press releases daily from more than 5000 research and health institutes. Here is an example : The elderberry way to perfect skin

We believe if you do search inside Iconocast, you will get better results than searching the web alone.

 
 
Continue News With: News7 ; News8 ; News9 ; News9A


ADVERTISEMENT

Iconocast is about learning and teaching without borders; we offer eMarketing, Internet Advertising, Internet Marketing, Search Engine Optimization, Search Engine Marketing, Online Branding, and eMarketing News Services.

 

Iconocast Home Page

Contact Iconocast

© 2003-07. ICONOCAST is a trademark of iconocast.com.