Credit: Johannes Kroiss and Martin Kaltenpoth, MPI for Chemical Ecology, Jena
Sunday, February 28, 2010
Beewolves House Beneficial Bacteria in Cocoons to Fend Off Pathogens-Discovery May Lead to New Drugs Say Max Planck Scientists
This caddisfly larva -- known as a "rock roller" to Utah and Wyoming fly fishermen -- lives underwater and spins natural sticky silk to build an underwater mobile home or case made of sand and rock grains (right half of image). But when placed in a laboratory aquarium with glass beads, the larva uses those beads to continue building its case (center). University of Utah bioengineer Russell Stewart has characterized the caddisfly's wet adhesive silk and hopes to synthesize a version for use as an adhesive tape during surgery.
Credit: Fred Hayes.
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During the three years of the project, the six partners have worked together to push long-wavelength VCSEL technology from lab to industry. The MOSEL project was lead by CEA-Leti (France) and included three academic partners: DTU Fotonik (Denmark), EPFL (Switzerland), and KTH (Sweden), and two industrial partners: Alight Technologies (Denmark) and BeamExpress (Switzerland).
The project demonstrated error-free 10GBASE-LR operation up to 100 °C, concurrently with record performance: single-mode (>30dB SMSR) power of >1mW up to 100°C (>2mW at room temperature) and 10Gbps modulation and transmission over 10-km single mode fiber with BER <10–11 up to 100°C with <1-dB power penalty.
These performances allow industrial partners to address different previously established standards and pursue commercialization of the results. At the same time, the academic partners have demonstrated different proofs of innovative concepts, preparing the basis for the next device generation.
The ever-growing demands for bandwidth in telecommunication networks, mainly caused by the unprecedented growth in data traffic in local and access networks, necessitate the development of new, low-cost, high-speed optical links in the 1–100 Gbps range. In contrast to the earlier evolution of optical fiber networks, the needs for high-bandwidth transmission have shifted from the high-capacity links (such as intercontinental and intercity) towards the network environment of the end users.
Due to their intrinsic performances (power consumption, beam quality) and low cost potential (mass production already proven in the case of optical mice), long- wavelength VCSELs provide a technological solution to an economical problem. Indeed, employing novel concepts for mode control and current injection has enabled the consortium to demonstrate device performances similar to or, in some cases, surpassing those of conventional edge-emitting lasers.
Isfahan University Low-Cost Magnetic Cobalt-Zinc-Ferrite Nanocrystals Deliver Drugs on Target and Aid Diagnostic Imaging
"We conducted a research with the aim of synthesizing cobalt-zinc ferrite nanopowders by co-precipitation chemical method and detecting their physical properties," Mortaza Mozaffari said to the news service of INIC.
"Most of nanoparticles synthesis methods are not economically appropriate for production at large scale because they are expensive and include toxic agents, complicated production steps, high reaction temperatures, and long reaction times," he added.
Noting that co-precipitation method has a relatively better size control and distribution compared to other methods, Mozaffari reiterated that it is also a reliable method for producing nanoparticles from the environmental consequences and laboratory safety points of view.
"In this study, first sodium hydroxide solution of definite pH was stirred at constant rate at room temperature. Meanwhile, definite amounts of cobalt chloride, zinc chloride, and ferrous chloride solutions were mixed together and their temperature amounted to ST. This mixture then was added to preheated sodium hydroxide solution abruptly and stirring this precipitate at constant pH, stirring rate, and temperature, kept on for one hour to ensure the formation of complete homogenous cobalt-zinc ferrite phase," he said.
Mozaffari continued saying that the precipitate resulting from reaction was refined and rinsed several times with water and the produced powder was dried at room temperature.
The synthesis of cobalt-zinc ferrite nanocrystals of crystal sizes less than 10 nm and homogenous size distribution in a way that it would be able to completely form the desired ferrite phase made up for the need to baking for phase formation consequently followed by production costs reduction.
The details of this research can be found at the Journal of Magnetism and Magnetic Materials, volume 322, pages 383 to 388, 2009.
The German-Japanese cooperation showed the first qualified samples of the novel material for application in micro systems at the nano tech 2010 in Tokyo in February.
MEMS, MOEMS, RF-MEMS, Measurements, Micro and Nano Material Highlight IVAM Microtechnology Network Exhibit
Saturday, February 27, 2010
Swiss Nanotech Report 2010 Shows Growing Economic Importance and Bright Future of Alpine Nano Companies and Research
Image Credit: EMPA
The aim of the "Swiss Nanotech Report" is to convey the first time a comprehensive picture of the Swiss nanotech landscape. In international comparison, Switzerland is among the most innovative countries in the field of nanotechnology: In 2006 alone there were in Switizer ten, "nano" inventions for patenting per million population."This demonstrates once again the high level of innovation within the research site Switzerland, which has greatly increased in recent years," said Heinz Muller from the Swiss Federal Institute of Intellectual Property in Bern, one of the initiators of the report.
A striking feature of nanotechnology is that it is a very interdisciplinary field of research. Innovative applications in the nanotechnology sector is far from confined to one sector, the opposite: How can nano-structures, for example, used to provide a more efficient use of solar energy to bring about a better water, or even to a more accurate diagnosis in health care - contribute, therefore applications that affect many different markets and sectors. More and more commercially successful products have been nano-components. The economic benefits of this technology is already out of question now, and is likely to become even more important in the future.
Source: Swiss Nanotech Report 2010
Swiss Nanotech Report 2010 is published by the project partners, which together with Empa, include the Adolphe Merkle Institute, the Ministry of Economy and Labor Basle-City, CSEM, the Swiss Federal Institute of Intellectual Property, IBM Zurich Research, i-net BASEL NanoLab / EPFL, the OSEC, the Swiss National Science Foundation, SIX Swiss Exchange, the State Secretariat for Education and Research and the Suva belong.
Empa engages in interdisciplinary work in a large number of specialized disciplines. Its key areas of research are grouped in five programs entitled Nanotechnology, Adaptive Materials Systems, Materials for Health and Performance, Materials for Energy Technologies and Technosphere – Atmosphere.
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