Gastroenterology

Microbiome-based technologies drive multibillion-dollar market

A new field of research in microbiology is transforming the way scientists see fungi, bacteria and other microorganisms. Microbiome research is so promising that it has drawn attention from funders and industry as well as ...

Diseases, Conditions, Syndromes

African countries need cheaper COVID-19 tests: Here's how to get them

COVID-19 continues to infect millions of people as the death toll mounts. There is currently no cure which means that controlling this disease requires a multi-pronged approach. This includes personal protection such as masks, ...

Diseases, Conditions, Syndromes

Beijing schools closed again as city finds 31 more virus cases

Beijing shut all its schools again on Wednesday as the city reported 31 new coronavirus cases, with authorities in the Chinese capital rushing to curb an outbreak linked to a wholesale food market.

Diseases, Conditions, Syndromes

In schools and offices, China steps up virus tests

Chinese tech giant Sina set up a special room in its Beijing office for workers to be tested for the coronavirus. A school took swab samples from students before allowing them into classrooms. A traveller took the test before ...

Diseases, Conditions, Syndromes

China changes method of counting virus infected... again

China said Thursday it has again changed the method of counting patients with the novel coronavirus and will now include only those diagnosed by sophisticated laboratory testing.

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Nucleic acid

A nucleic acid is a macromolecule composed of chains of monomeric nucleotides. In biochemistry these molecules carry genetic information or form structures within cells. The most common nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleic acids are universal in living things, as they are found in all cells and viruses. Nucleic acids were first discovered by Friedrich Miescher in 1871.

Artificial nucleic acids include peptide nucleic acid (PNA), Morpholino and locked nucleic acid (LNA), as well as glycol nucleic acid (GNA) and threose nucleic acid (TNA). Each of these is distinguished from naturally-occurring DNA or RNA by changes to the backbone of the molecule.

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