feed info

54 articles from PhysOrg

MicroCT reveals detailed head morphology of arthropod, Leanchoilia illecebrosa

An international collaboration between researchers at Harvard University and Yunnan University in China uses microCT to study and restudy arthropod fossils from the early Cambrian in the Chengjiang biota in the Yunnan Province of China. Their latest study shows with unprecedented clarity the head morphology of the species Leanchoilia illecebrosa and demonstrates the presence of a labrum thus...

Selling something? Tap into consumer arrogance

Deny it you might, but even modest consumers brag about their purchases every once in a while. But can marketers leverage our tendency to brag about our buys to market products or services more successfully?

Researchers discover new boron-lanthanide nanostructure

The discovery of carbon nanostructures like two-dimensional graphene and soccer ball-shaped buckyballs helped to launch a nanotechnology revolution. In recent years, researchers from Brown University and elsewhere have shown that boron, carbon's neighbor on the periodic table, can make interesting nanostructures too, including two-dimensional borophene and a buckyball-like hollow cage structure...

Mountain meadow restoration can bring birds back

In a new study led by scientists at Point Blue Conservation Science and in collaboration with The Institute for Bird Populations, authors evaluated the successes of mountain meadow restorations by analyzing eight years of bird data collected by field biologists. The authors concluded that, when "pond and plug" and similar techniques were followed, the number of birds of many species increased over...

Super-Earths discovered orbiting nearby red dwarf

The nearest exoplanets to us provide the best opportunities for detailed study, including searching for evidence of life outside the solar system. In research led by the University of Göttingen, the RedDots team of astronomers has detected a system of super-Earth planets orbiting the nearby star Gliese 887, the brightest red dwarf star in the sky. Super-Earths are planets which have a mass higher...

Motions in the sun reveal inner workings of sunspot cycle

The sun's magnetic activity follows an 11-year cycle. Over the course of a solar cycle, the sun's magnetic activity comes and goes. During solar maximum, large sunspots and active regions appear on the sun's surface. Spectacular loops of hot plasma stretch throughout the sun's atmosphere and eruptions of particles and radiation shoot into interplanetary space. During solar minimum, the sun calms...

Researchers unveil mechanism to obtain metal 'nanoscrews'

Led by the Ikerbasque professor Luis Liz-Marzán, researchers at the Centre for Cooperative Research in Biomaterials CIC biomaGUNE have developed a mechanism by which gold atoms are deposited by means of chemical reduction onto previously formed gold nanorods to produce a quasi-helicoidal structure (the particles acquire chirality). This geometry enables these "nanoscrews" to interact with...

Why are plants green? Research team's model reproduces photosynthesis

When sunlight shining on a leaf changes rapidly, plants must protect themselves from the ensuing sudden surges of solar energy. To cope with these changes, photosynthetic organisms—from plants to bacteria—have developed numerous tactics. Scientists have been unable, however, to identify the underlying design principle.

Chemists achieve breakthrough in the synthesis of graphene nanoribbons

Graphene nanoribbons might soon be much easier to produce. An international research team led by Martin Luther University Halle-Wittenberg (MLU), the University of Tennessee and Oak Ridge National Laboratory in the U.S. has succeeded in producing this versatile material for the first time directly on the surface of semiconductors. Until now, this was only possible on metal surfaces. The new...

Tracking the spread of mosquito insecticide resistance across Africa

In a step toward better control of the mosquitoes that transmit malaria, researchers have mapped the patterns of insecticide resistance in Anopheles gambiae mosquitoes across Africa. The new study, published June 25, 2020 in the open-access journal PLOS Biology by Catherine Moyes and Penelope Hancock of the University of Oxford, UK, and collaborators, found that resistance to five mainstream...

Astronomers discover 'monster' quasar from early universe

Astronomers have discovered the most massive quasar known in the early universe, containing a monster black hole with a mass equivalent to 1.5 billion suns. Formally designated as J1007+2115, the newly discovered quasar is one of only two known from the same cosmological period. Quasars are the most energetic objects in the universe, and since their discovery, astronomers have been keen to...