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Ebola outbreak in Guinea

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Guinea is suffering from an outbreak of the Ebola virus, which started in the southeastern region of the country and now reached the capitol Conakry. The Guinea Ministry of Health reported a total of 127 probable and suspect cases, 35 out of which were confirmed by laboratory analysis. Reports from the World Health Organization (WHO) say that 83 of these suspect cases died and that the disease also spread in the neighboring Liberia, with 8 suspect cases, 5 out of which were lethal and 2 laboratory-confirmed. Genetic analysis revealed that this virus is closely related to that reported in 2009 in the Democratic Republic of the Congo.

Medical charity Medecins Sans Frontieres (MSF) has said that the outbreak is unprecedented and difficult to control, but the WHO stated that this is not an epidemic and is geographically limited. This is due to the high lethality of Ebola virus, which prevents a widespread contagion. This is the reason why Ebola outbreaks are terrible but may be restrained, thus preventing them from becoming pandemic.

Ebola is a rare and deadly hemorrhagic fever caused by a virus, which spreads by direct contact with blood or body fluids of an infected person, but also by contact with contaminated objects or infected animals. First symptoms are fever, headache, joint and muscle aches, sore throat, and weakness. In a second phase, the disease causes diarrhea, vomiting, and stomach pain. Some patients may also display skin rash, red eyes, and internal and external bleeding. In severe cases, it may lead to organ failure and unstoppable bleeding.

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Discovered a New Carbon-Carbon Chemical Bond

A group of researchers from Hokkaido University has provided the first experimental evidence of the existence of a new type of chemical bond: the single-electron covalent bond, theorized by Linus Pauling in 1931 but never verified until now. Using derivatives of hexaarylethane (HPE), the scientists were able to stabilize this unusual bond between two carbon atoms and study it with spectroscopic techniques and X-ray diffraction. This discovery opens new perspectives in understanding bond chemistry and could lead to the development of new materials with innovative applications.

In the cover image: study of the sigma bond with X-ray diffraction. Credits: Yusuke Ishigaki

After nearly a year of review, on September 25, a study was published in Nature that has sparked a lot of discussion, especially among chemists. A group of researchers from Hokkaido University synthesized a molecule that experimentally demonstrated the existence of a new type of chemical bond, something that does not happen very often.