Specialists at the Scientific Research Institute “AGAT”, located in the town of Zhukovsky, in the Moscow Region, applied a small device to the inside of the palm and identified the required value with a touch of a button. The small device, the size of a telephone receiver, is a two-channel spectrophotometer, which determines the absorption or irradiation of light of a definite wavelength. It operates as follows.
A fibreoptic block is tightly pressed to the skin, usually on the inside of the palm because the skin is thinner here and has less pigmentation. The flashbulb light travels along the optical fiber onto the body surface, where it is partly reflected and partly absorbed by the top layers of the skin and also by the blood. Bilirubin absorbs and reflects specific wavelengths of light which can then be measured.
This reflected, or more precisely, diffusely reflected (i.e. dispersed by tissue) signal travels via the other optical fibre into photoelectric receptors. It then passes through two channels with a light filter set at 460 and 550 nanometer wavelengths. Two channels allow comparison of reflected radiation at two wavelengths. The device rejects the background radiation to leave behind the bilirubin signal.
The device can determine the bilirubin concentration in the blood from zero to 400 micromoles per litre, where 400 is the highest value possible in cases of extreme jaundice. The device including batteries weighs 470 grams and takes just over a minute to measure one reading and prepare for the next. This analyzer is ideal to check large groups of the population for jaundice and as no injections are involved, there is no opportunity to transmit infections between patients.
Nadezda Markina | alfa
Study tracks inner workings of the brain with new biosensor
16.08.2018 | Rheinische Friedrich-Wilhelms-Universität Bonn
Foods of the future
15.08.2018 | Georg-August-Universität Göttingen
There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.
The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
20.08.2018 | Information Technology
20.08.2018 | Life Sciences
20.08.2018 | Information Technology