Chemical composition - 24 News

Researchers use ghost imaging to speed up X-ray fluorescence chemical mapping

By eliminating lenses, this advance could benefit a host of applications, including medical imaging, industrial inspection and art analysis

19-Jan-2022 - Researchers have developed a new, focus-free technique for creating chemical maps using x-ray fluorescence. The approach offers fast, high-resolution measurements, which could be useful for analyzing chemical composition for a range of applications in biomedicine, materials science, archeology, ...

Researchers dramatically downsize technology for fingerprinting drugs and other chemicals

Tiny photonic chip could fit comfortably within the tip of a finger

01-Sep-2020 - As new infectious diseases emerge and spread, one of the best shots against novel pathogens is finding new medicines or vaccines. But before drugs can be used as potential cures, they have to be painstakingly screened for composition, safety and purity, among other things. Thus, there is an ...

Rust never sleeps

Chinks in iron crystals that can 'heal'

06-Feb-2019 - Like iron flowing through the blood stream, iron minerals course through the ground. These minerals are used to make steel and other metal alloys used in everything from cell phone components and cars to buildings, industrial equipment and infrastructure. Unfortunately, when exposed to oxygen and ...

Chirality in 'real-time'

Circular dichroism in the deep ultraviolet

11-Jan-2019 - In nature, certain molecules with the same chemical composition, can exist in two different shapes that are mirrors images of each other, much like our hands. This property is known as "chirality" and molecules with different chirality are called enantiomers. Enantiomers can exhibit entirely ...

Carrying and releasing nanoscale cargo with 'nanowrappers'

Nanocubes for biomedicine, catalysis and beyond

08-Jan-2019 - This holiday season, scientists at the Center for Functional Nanomaterials (CFN)--a U.S. Department of Energy Office of Science User Facility at Brookhaven National Laboratory--have wrapped a box of a different kind. Using a one-step chemical synthesis method, they engineered hollow metallic ...

Pocket-size food scanner

General-use, cost-effective scanning technology that can be easily adapted

07-Jan-2019 - According to a study by the environmental organization WWF Germany, ten million metric tons of food are thrown in the garbage every year in Germany despite still being edible. A mobile food scanner will allow consumers and supermarket operators in the future to test whether food items have gone ...

Investigation of inorganic pigments with apatite structure

02-Nov-2018 - Compounds with the apatite structure differ from most classes by the variety of their chemical compositions: to create such substances, most chemical elements of the Periodic System can be used, while the characteristics of the crystalline structure of apatite will be preserved. The resulting ...

Diels-Alder reaction changes direction completely

29-Jun-2018 - The Diels-Alder reaction is widely used in organic synthesis. Chemists appreciate its simplicity, reliability, and the ability to influence its course and change the conditions of the process. Several products of these transformations are used to create graphene-like materials, product vitamins, ...

Smog laid bare: Precise analysis of the composition of particulate matter

22-May-2018 - Smog is a problem. But the knowledge about its constituents - no longer. Researchers from several leading Warsaw scientific institutions have joined forces and developed a new, extremely precise method for the chemical analysis of suspended particulate matter. The method, easily adaptable in many ...

Linking superconductivity to periodic table

12-Apr-2018 - Scientists from Moscow Institute of Physics and Technology and Skoltech have demonstrated the high-temperature superconductivity of actinium hydrides and discovered a general principle for calculating the superconductivity of hydrides based on the periodic table alone. High-temperature ...