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22 q&more articles about the topic chemistry

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Micelles as a reaction environment

Microstructured, aqueous solutions allow for a photocatalytic activation of alkyl chlorides

Photoredox catalysis has developed into a powerful tool for the synthesis of organic compounds with diverse structures. However, the high stability of carbon-chloride bonds has long hampered the use of cheap and readily available chloroalkanes as substrates.

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Scientist – Teacher – Service provider

Carl Remigius Fresenius (1818–1897), a pioneer of analytical chemistry

On December 28, 2018, Carl Remigius Fresenius would have celebrated his 200th birthday (Fig. 1.) Not only was he a scientist but also an innovative entrepreneur as well as the teacher of about 5,000 students during the more than fifty years of his pioneering, enduring professional work. It is ...

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Mercury in the environment

A comparison of different analysis techniques for determination and species analysis of mercury

Mercury is undisputedly one of the most toxic elements. In 2013, the Minamata Convention on Mer-cury to restrict the production and emission of this heavy metal was adopted in Geneva. It regulates the production, use and storage of mercury. For example, new mines may no longer be built and ...

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Coffee – A world of variety

Using photoionization mass spectrometry for online analysis and control of the coffee roasting process

Turning green coffee into roasted brown beans conjures myths, trends and desires. From the small gourmet roaster to the industrial plant, the growing consumer interest in quality and variety has increased the need to understand and influence the processes that take place when coffee is being ...

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Light plus current: The formula for researching what happens to individual nanoparticles

Electrochemical dark-field microscopy can visualize and help investigate the reactions of individual nanoparticles

A combination of dark-field microscopy and electrochemistry can make individual nanoparticles in a liquid medium visible. The technique is suited to determine the activity of catalysts during their use.

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Perspectives of Computer-Aided Drug Design

Working with models, namely three-dimensional illustrations of reality, is an integral part of any industrial design process. ­However, can we also use ‘design’ in relation to drug research? What is our understanding of these techniques today?

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Water instead of mineral oil

Innovation in chiral catalysis – A milestone for the pharmaceutical industry

Optical active substances made from chiral catalysis form the basis of many drugs. Expensive precious-metal catalysts are required for the chemical production, which due to their thermal instability decompose at high temperatures and can therefore only be used once. The innovative process of ...

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A new world of lighting

Organic electroluminescent materials and devices

Organic light-emitting device (OLED) is a solid-state light-emitting device based on organic semiconductors. Recent rapid advances in material chemistry have enabled white OLEDs to be used for general lighting and large-area flat panel displays. Efficacy of white OLED panel has reached 110 lm/W ...

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Modular biofactories at the cellular level

A new chapter in the book of life for a sustainable bioeconomy

Despite his love for complex molecular architectures, this „dyed-in-the-wool“ bio-organic chemist has never embraced the conventional segregation of synthetic polymers and bio­logical macromolecules. All molecules are composed of atoms, after all. Why make an artificial distinction? Why not ...

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Quality assurance in medical laboratories

Paths to global competence standards

Quality assurance in medical laboratories is of fundamental importance for the process of in vitro diagnosis for many diseases. The ISO 15189 standard ("Medical laboratories — Particular requirements for quality and competence") was developed to address the general dissatisfaction with current ...

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