Xavier / X-TRONIX LTD
Syndicate
DNA sequencing using STM
Stuart Lindsay and his collaborators use genetic material to bridge the gap between a scanning tunnelling microscope and a sample of interest.
As the tip scans along the surface, the genetic material either bonds or ignores the underlying genetic material - leading to a varying tunnelling current. The resulting image reveals the identity of the DNA sample under inspection.
Quantum physics could come to the aid of medical science as a new technique for identifying DNA utilizes the quantum effect of tunnelling. The method, developed by physicists in the US, will enable users to read genetic codes directly by studying DNA with ...<< MORE >>
Tips & Tricks - Vacuum Viewports
This had already been posted back in September 2007 and as it did attract tremendous interest I'm happy to give it a makeover with more detail !
For those who do not often change things on a UHV vacuum system, here's some tips if you need to mount a viewport. First, never use a viewport that appears to be, or is known to be damaged. A replacement viewport costs far less than repairing a system that has been subject of an implosion caused by a faulty viewport.
SAFETY
Pressure differentials: Kodial VPZ viewports are designed to withstand 1 Bar differential pressure. Other standard ...<< MORE >>
Thunderbolts Of The Gods
You've understood it, this is controversial material - so intrinsically stimulative to ...<< MORE >>
Life on Earth
Science informs us that microbes were the first inhabitants of Earth. These are single-celled organisms which we commonly call bacteria, fungi and protozoa. Microbes are still found everywhere today, in boiling hot thermal springs, as well as deep below the surface of the Antarctic, and even high in the atmosphere.
Microbes decompose the waste products of other living things, creating nutrients. They are also used to make beer, bread, and yogurt. Did I hear you say...yak!?
Earth formed about 4.5 billion years ago. No one knows for a fact when or how life began. The final, most important events leading to the beginning of life are possibly the least ...<< MORE >>
Neutrinos could probe Earth’s structure
In the absence of a 6,000 km-deep hole to conduct observations, scientists hoping to learn about the internal structure of the Earth presently have few options but to monitor seismic waves. However, this technique, which relies on models of how waves are affected by rock properties, is indirect and so potentially unreliable. A truly direct method, suggest researchers from Spain, Japan and the US, might be to monitor the proportion of atmospheric neutrinos that are absorbed while passing through the Earth.
This isn’t the first ...<< MORE >>
Understand Relativity......at last
Einstein's theory of special relativity includes electricity and magnetism in a simple, logical extension of the relativity of Galileo and Newton. Its conclusions, including time dilation, length contraction, and E=mc2 have changed profoundly our ideas of time and space, matter and energy.
These multimedia modules (click here for the PDF) developed by the University of New South Wales, one of Australia's leading research and teaching universities, give a brief overview of relativity - they present the main ideas. Inevitably, you ...<< MORE >>
Comparative study between Bellows and Diaphragm Gas Valves
The seal of a diaphragm valve is made through the controlled deformation in a Hastelloy® diaphragm across a Kel-F® seat. The stroke, or deformation travel, of the diaphragm between open and closed positions is in the order of 0.2mm - 0.3mm.
The seal of a formed bellows valve is made by the displacement across the axis of the bellows via the expansion of the undulations. One such undulation is equivalent to about two diaphrams.
Example:
Toys & Consumer Goods Screening with Handheld XRF
Errors happen, often with no intension of wrongdoing. That’s maybe why in scientific research, peer review and revalidation is so important and so ingrained in the way this community functions.
You might have asked yourself how do they test that stuff anyway. Any chemist reading this blog would have no trouble figuring out more than one method to run such tests. There are enough varieties of instruments on the market to reveal ...
Batch Production Vacuum Exhaust System
The VES-210 was recently delivered to ThermoFisher
Scientific, a world-class scientific & industrial analytical instrumentation company. It will be used for production in their state-of-the-art X-ray collection techniques facility. Thermo Fisher
Scientific X-ray Fluorescence and X-ray Diffraction products provide elemental composition and structural
information from a variety of materials. Such systems are typically used in cement and metallurgy industries, among
others.
The VES-210 consists of 2x 10 vacuum evacuation and gas backfill ports; 10 in
...
CERN / ALICE ToF Detector
The existence of such a phase and its properties are key issues in QCD for the understanding of confinement and of chiral-symmetry restoration. For this purpose, the collaboration intends to carry out a comprehensive study of the hadrons, electrons, muons and photons produced in the collision of heavy nuclei. Alice will ...