New Horizons spacecraft takes the inside course to Ultima Thule

With no apparent hazards in its way, NASA's New Horizons spacecraft has been given a "go" to stay on its optimal path to Ultima Thule as it speeds closer to a Jan. 1 flyby of the Kuiper Belt object a billion miles beyond ...

Researchers investigate complex molecular structures

The job of hemoglobin seems to be quite simple: It transports oxygen molecules through the bloodstream. But this only works so well because the hemoglobin molecule is extremely complex. The same applies to chlorophyll, which ...

The periodic motion of flexible knots, and the connection to DNA

Can the topology of microobjects influence the way they move in a fluid? Experiments and simulations of Polish and Swiss researchers published in the Physical Review Letters show that the dynamics of elastic chains settling ...

Proof of water wires motivated by a biological water channel

Aquaporins are proteins that serve as water channels to regulate the flow of water across biological cell membranes. They also remove excess salt and impurities in the body, and it is this aspect that has led to much interest ...

Rapid screening machine can read and separate protein sequences

The structural properties of proteins that could eventually become important materials for manufacturing and medicine are revealed by a novel optical technique that works rapidly to sort through amino acid sequences even ...

Metamaterial: Mail armor inspires physicists

The Middle Ages certainly were far from being science-friendly: Whoever looked for new findings off the beaten track faced the threat of being burned at the stake. Hence, the contribution of this era to technical progress ...

Faster (cheaper) method for making big bioactive ring molecules

Ring molecules called cyclic depsipeptides play an important role in living organisms. Microbes make them as part of their chemical arsenal for attacking competitors and they have proven effective as antibiotics, anti-retrovirals ...

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