A simple method to sense DNA, as well as potential biomarker proteins of cancer or other diseases such as Alzheimer’s, may soon be within reach. Scientists have created a photonic crystal nanolaser biosensor capable of detecting the adsorption of biomolecules based on the laser’s wavelength shift.
A multidisciplinary research team has studied two paintings in the side altar of the parish of Our Lady of the Immaculate Conception in Purisima del Rincon, Guanajuato in Mexico, by the artist Hermenegildo Bustos. The paintings contain three overpainted layers with a number of unregistered modifications hidden from view.
It has been taken for granted for over 50 years that the type of spectroscopy widely used to study hydrogen inside materials is not subject to any selection rules. In a joint theoretical and experimental study, researchers showed that this near universally held view is incorrect for at least one important class of hydrogen-entrapping compounds by confirming experimentally the validity of the selection rule formulated in 2013.
Chlorination is used primarily to prevent pathogenic microorganisms from growing. Previous research has shown that many constituents of urine including urea, uric acid and amino acids, interact with chlorine to produce potentially hazardous disinfection byproducts in swimming pools. However, chemicals from pharmaceuticals and personal care products, or PPCPs, could also be harmfully interacting with chlorine.
The discovery of "topologically protected" electrical conductivity on the surface of some materials whose bulk interior acts as an insulator was among the most sensational advances in the last decade of condensed matter physics. Now, a new atomic-scale study of the surface properties of one of these ferromagnetic topological insulators reveals that these materials may not be what they seemed.
The team responsible for the Sample Analysis at Mars (SAM) instrument suite on NASA's Curiosity rover made the first definitive detection of organic molecules on Mars using chromatography. Here's a closer look at their work and their equipment.
Researchers have used gas chromatography mass spectrometry to analyze chestnuts from transgenic American chestnut trees— trees that were altered with a wheat gene— and found they had an increased resistance to blight.
The lithium-ion batteries that mobilize our electronic devices need to be improved if they are to power electric vehicles or store electrical energy for the grid. Researchers, looking for a better understanding of liquid electrolytes, found surprising results in the first X-ray absorption spectroscopy study of a model lithium electrolyte.
Four pulses of laser light on nanoparticle photocells in a spectroscopy experiment have opened a window on how captured sunlight can be converted into electricity. The work, which potentially could inspire devices with improved efficiency in solar energy conversion, was performed on photocells that used lead-sulfide quantum dots as photoactive semiconductor material.
The southeastern U.S. is a natural laboratory for scientists studying how chemicals emitted by human activities and trees interact with each other and affect air quality and climate. A new study has found that certain emissions from cars and coal-fired power plants promote processes that transform naturally occurring emissions from trees into organic aerosols.
The semiconductor industry is built on the propensity of electrons in silicon to get kicked out of their atomic shells and become free. These mobile electrons are routed and switched though transistors, carrying digital information. An international team of physicists and chemists has taken snapshots of this ephemeral event using attosecond pulses of soft X-ray light lasting only a few billionths of a billionth of a second.
Swimmers looking to monitor and improve technique, and patients striving to heal injured muscles, now have a new light-based tool to help reach their goals. Researchers have described the first measurements of muscle oxygenation underwater and the development of the enabling technology.
By studying the color of seabird guano in the infrared part of the spectrum, researchers were able to identify and isolate penguin and seabird poo’s unique spectral signature from bare rocks and snow. Applying this to satellite imagery, the team was able to identify all known major colonies of Adelié penguins, and colonies of several species of seabirds.
Research has linked the increase in sudden cardiovascular death with the recent consumption of cocaine. In people in the 19-49 age bracket, this risk is quadrupled.
As the holidays draw near, many of us will hop on a plane to visit friends and family– or just get away from it all. Some will be subjected to a swab at the airport to test clothes and baggage for explosives. So how does this process work? The answer is chromatography.
The December issue of Chromatography Techniques details a mass spectrometry technique enables the detection of drugs and medical conditions from just a single drop of fluid, such as blood or urine, within minutes. Other articles include: size of future mass spec, choosing HPLC columns, soft ionization, separation of antibodies. There are also new products.
Because of the high cost of HPLC columns, there are numerous ways to find out which column(s) might best be of use for an intended but new separation. If some of the components are known, then the literature or manufacturers’ websites can be consulted. This might take some time, but the research of others can save both time and money in your own work.
Pre-formulated buffers for pH gradient have greatly simplified the development of ion exchange chromatography (IEX) of monoclonal antibodies (mAbs). Three features make this simplification possible.
Soft ionization remains a relatively underused technique for GCMS, despite its ability to provide improved confidence in the identification of a range of challenging analytes. But there is now a new approach that makes it possible to lower the energy of electron ionization to achieve soft ionization, without the disadvantages with which it has historically been associated.
Mass spectrometry (MS) is the workhorse of analytical chemistry. It performs the analysis of the sample, making MS equipment an essential part of the analytical instrumentation market. A recent shift in the laboratory landscape, however, is forcing a change in the size and functionality of mass spec equipment.
UP Analytical’s GasMix is a companion to set up on-site customized preparation for single and multipoint calibration gas standards. The principle is based on the mixing and/or dilution of 2 to 12 gas standards and may be used with virtually all types of analytical instruments, with applications such as analyzer calibration and validation, odorize natural gas, synthetic gas mixture generation, glove box atmosphere control, reactor gas feeding, sample conditioning prior to analysis and more.