Pathogenic Bacteria use a Sugar in the Intestinal Mucus Layer to Infect the Gut, study shows

The Citrobacter rodentium (orange) rely on sugars in the intestinal mucus layer (green).
Harmful gut bacteria like Citrobacter rodentium (orange) rely on sugars in the intestinal mucus layer (green).

A new study by researchers at the University of British Columbia (UBC) and BC Children’s Hospital shows the sugar sialic acid, which makes up part of the protective intestinal mucus layer, fuels disease-causing bacteria in the gut.

The findings, published in PNAS, suggest a potential treatment target for intestinal bacterial infections and a range of chronic diseases linked to gut bacteria, including inflammatory bowel disease (IBD), celiac disease, IBS and short bowel syndrome.

“Bacteria need to find a place in our intestines to take hold, establish and expand, and then they need to overcome all the different defenses that normally protect our gut,” says Dr...

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First direct Visualization of a Zero-field Pair Density Wave

Illustration of the superconducting material Eu-1144
In this illustration of the superconducting material Eu-1144, the blue and magenta wave shown above the crystal lattice represents how the energy level of the electron pairs (yellow spheres) spatially modulates as these electrons move through the crystal.

In the field of superconductivity—the phenomenon in which electrons can flow through a material with essentially zero resistance—the “holy grail” of discovery is a superconductor that can perform under everyday temperatures and pressures. Such a material could revolutionize modern life. But currently, even the “high-temperature” (high-Tc) superconductors that have been discovered must be kept very cold to function—too cold for most applications.

Scientists still have much to learn before room-temperature superconductivity can...

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‘Sandwich’ Discovery offers New Explanation for Planet Formation

An artist's impression of a planetary system appearing in colours of orange, yellow and brown.
Artistic rendering of how small planets can form ‘sandwiched’ in between two larger ones.
Credit: University of Warwick/Mark A. Garlick Licence type Attribution (CC BY 4.0)

Scientists have made a new discovery on how small planets might form. Researchers at the University of Warwick investigated the “birth environment” of planets—areas of gas and dust that swirl around a central star—known as the protoplanetary disk.

They discovered a new method of planet formation in this region, not yet described in previous research. The work has been submitted to the journal Monthly Notices of the Royal Astronomical Society and is showcased at the National Astronomy Meeting, which begins today, Monday 3 July...

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New Ferroelectric Material could give Robots Muscles

Actuation of ferroelectric polymers driven by Joule heating
Actuation of ferroelectric polymers driven by Joule heating.  Credit: Qing Wang. All Rights Reserved.

A new type of ferroelectric polymer that is exceptionally good at converting electrical energy into mechanical strain holds promise as a high-performance motion controller or “actuator” with great potential for applications in medical devices, advanced robotics, and precision positioning systems, according to a team of international researchers led by Penn State.

Mechanical strain, how a material changes shape when force is applied, is an important property for an actuator, which is any material that will change or deform when an external force such as electrical energy is applied...

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