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1,503 articles from PhysOrg

Changing climate impacts biodiversity in protected areas globally

Protected areas—such as nature reserves, national parks, and wilderness areas—are essential to conserving biodiversity. New research published in Environmental Research Letters provides insights for developing climate-smart conservation strategies. The study looked at the global network of protected areas, evaluated potential for shifts in where plants and animals occur due to climate...


FRIDAY 29. APRIL 2022


Discovery of aberrant protein that kills bacterial cells could help unravel mechanism of certain antibiotics

Biologists at the U.S. Department of Energy's Brookhaven National Laboratory and their collaborators have discovered an aberrant protein that's deadly to bacteria. In a paper just published in the journal PLOS ONE, the scientists describe how this erroneously built protein mimics the action of aminoglycosides, a class of antibiotics. The newly discovered protein could serve as a model to help...

Controlling chemical mirror images

Chirality, while not a rarity in the world of molecules, is nevertheless a special property. If a molecule is chiral (from the Greek word chiros = hand), it exists in two mirrored versions that are very similar but not identical—like two hands that can be folded together, but cannot be placed congruently on top of each other. This is why we speak of right-handed and left-handed molecules, or...

Researchers suggest that complex bird songs might require large populations

Growing up in a small community has its advantages, but if you want to learn from world experts, you may have better luck in a big city. This is the case in the world of birds as well. Large populations of birds might be better able to maintain complex songs than small populations—all because of access to high-quality tutors.

Trunk spines can defend against bark feeding and climbing mammals

Spines on plants are widely distributed across plant families. The defensive role of spines has previously been associated with leaves, young shoots and reproductive organs. However, the different syndromes of spiny plants have barely been explored and people do not yet have a complete synthesis of their function based on their morphological attributes.

Urban lighting needs to consider migrating birds, study suggests

University of Manitoba researchers have published a paper that challenges the way we think about airspace. By equipping some migratory birds with a GPS backpack, the biologists provided new and crucial data to a burgeoning idea that argues airspace is a habitat and we need to conserve it, an idea that is gaining support in municipal governments across Canada, including most recently in Winnipeg.

Biomedical polymers: Synthesis, properties, and applications

Biomedical polymers have been extensively developed for promising applications in a lot of biomedical fields, such as drug delivery, disease detection/diagnosis, biosensing, regenerative medicine, and disease treatment. For example, polymer-based carriers provide major advances in improving bioavailability and therapeutic outcomes at spatiotemporal drug delivery, greatly benefiting the treatment...

Giant tunneling electroresistance in ferroelectric tunnel junctions successfully obtained in a newly suggested scheme

Recently, in a paper published in Physical Review Applied, a research team from the Hefei Institutes of Physical Science (HFIPS), Chinese Academy of Sciences (CAS) studied the interfacial control of transport properties of perovskite oxide ferroelectric tunnel junctions (FTJs) and proposed a new scheme to achieve a giant tunneling electroresistance (TER) in FTJs.

How a soil microbe could rev up artificial photosynthesis

Plants rely on a process called carbon fixation—turning carbon dioxide from the air into carbon-rich biomolecules—for their very existence. That's the whole point of photosynthesis, and a cornerstone of the vast interlocking system that cycles carbon through plants, animals, microbes and the atmosphere to sustain life on Earth.

Ultrafast optical-magnetic memory device

Magnetic random-access memory (MRAM) technology offers substantial potential towards next-generation universal memory architecture. However, state-of-the-art MRAMs are still fundamentally constrained by a sub-nanosecond speed limitation, which has remained a long-lasting scientific challenge in the spintronics R&D. In this double doctorate project, Luding Wang experimentally demonstrated a...

Researchers reveal activation mechanism of thyrotropin-releasing hormone receptor

Thyroid hormone (TH) plays a multifunctional role in metabolism and development in vertebrates. The synthesis and secretion of TH is determined by the hypothalamus-pituitary-thyroid (HPT) axis. The tripeptide thyrotropin-releasing hormone (TRH, pGlu-His-Pro-NH2) is the initial hormone of HPT, synthesized in the hypothalamus and acts on TRH receptor (TRHR). Upon stimulation by TRH, TRHR prompts...