Researchers at the Max Planck Institute of Metals Research have identified two temperature-dependent mechanisms controlling the brittle-to-ductile transition in materials. Dislocation mobility dominates fracture toughness above a characteristic temperature, whereas dislocation nucleation controls fracture toughness below this temperature.
A Guatemalan forest has been identified as the world's most diverse home of slime molds, with over 1,000 species collected by Ohio University researcher James Cavender. The discovery highlights the importance of these ancient organisms in maintaining soil health and fertility.
Researchers found that the thalamus, a key brain region, can remodel its connections after sensory nerves are severed, potentially leading to recovery of function after stroke or nervous system damage. The discovery sheds light on the brain's ability to reorganize and challenges scientific dogma that it is fixed after infancy.
Researchers found that the GroEL oligomeric structure is essential for biologically significant chaperonin function. The study showed that enclosure of an unfolded protein in the cage provides a mechanism to prevent protein aggregation during folding, particularly for aggregation-sensitive proteins.
Research at the University of Delaware reveals that children with Williams Syndrome may struggle to describe spatial relationships, using motion verbs less frequently and having difficulties encoding object properties and location. This cognitive deficit may be related to their impaired non-linguistic knowledge.
Scientists at University of Wisconsin-Madison successfully derive human embryonic stem cells (hES cells), which can form all cell types and tissues, holding great promise for transplantation medicine and drug discovery. The availability of hES cells opens extraordinary opportunities for tissue transplantation and cell and gene therapy ...
Researchers at Johns Hopkins Medicine successfully isolated and cultured human embryonic stem cells, a long-sought achievement. The versatile cells have the potential to rapidly study human processes and develop new therapies for various diseases, including diabetes, Parkinson's disease, and muscular dystrophies.
Scientists found that apoptosis induces the processing of EMAP II precursor protein, releasing a biologically active form that recruits macrophages. This process is crucial for tissue remodelling and coordinating cell death during embryonic development.
A new Ohio University study reveals that alligators evolved from semi-erect to sprawl postures, contrary to the conventional theory of animal posture evolution. Researchers analyzed alligator movement and found that their walking patterns are more similar to those of salamanders and lizards than previously thought.
Researchers at Johns Hopkins Medicine discovered that bearing down hard during sex can cause transient global amnesia, a temporary inability to form new memories. The study found two cases of men experiencing confusion and amnesia after sex, linked to the Valsalva maneuver and sympathetic nervous system activation.
Hydralazine improves cell health by decreasing free radicals, a chemical byproduct of normal aerobic activities. The medication has been used for decades to treat high blood pressure and appears to have a positive side effect.