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51 notícias encontradas para "mechanism"
How giant tropical trees transport water 70 meters to stay as drought-resilient as smaller
The giant trees of tropical forests are important allies in the fight against climate change because of their ability to store carbon, yet they are still poorly understood by science. However, a study published in the journal Science reveals a crucial survival mechanism: These tr
Light flips bacterial signaling enzyme between two shapes, unlocking how signals travel
Researchers at the University of Bayreuth and Forschungszentrum Jülich have demonstrated that specific light-sensitive enzymes—so-called sensor histidine kinases (SHKs)—transmit their signal through a light-controlled change in asymmetry. With their new study, the researchers con
Scientists may have finally found how Alzheimer's kills brain cells
Scientists may have finally found how Alzheimer's kills brain cells
Researchers have identified a previously overlooked mechanism of brain cell death that appears to play a major role in Alzheimer's disease and frontotemporal dementia. The finding could lead to new treatments aimed at slowing neuron loss by interrupting the process before cells a
Atomic 'domino effect' found to drive phase changes in a two-dimensional crystal
Atomic 'domino effect' found to drive phase changes in a two-dimensional crystal
Phase transformations—in which a material changes from one crystal structure to another, thereby acquiring dramatically different properties—are ubiquitous in nature. Understanding the microscopic mechanisms of these transformations is essential for controlling material propertie
Watching how molecules change shape in slow motion could inform future molecular machines
Researchers at the Nano Life Science Institute (WPI-NanoLSI) at Kanazawa University, the Institute for Molecular Science and SOKENDAI have uncovered the hidden mechanism behind a molecular switch—a molecule that can change between different structural states in response to a chem
Simple cell migration mechanism may explain how hair follicles organize before birth
Simple cell migration mechanism may explain how hair follicles organize before birth
In mammals, hair follicles emerge during embryonic development, forming geometric patterns that vary from one species to another. But how is the position of each hair determined? A team from the University of Geneva (UNIGE) has shown that a simple mechanism based on the movement
More than 90% of key nutrients degrading the Mar Menor lagoon come from recirculated under
More than 90% of key nutrients degrading the Mar Menor lagoon come from recirculated under
More than 90% of the key nutrients degrading the Mar Menor, such as ammonium, phosphorus and silica, do not come from streams or continental groundwater, but rather through a mechanism that has so far been overlooked: Water from the lagoon itself infiltrates the sediments and re-
Study identifies key mechanism regulating how cells use fat to generate energy
Study identifies key mechanism regulating how cells use fat to generate energy
An international study by scientists at the Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC) and the University of California, Los Angeles (UCLA) has identified a fundamental mechanism that regulates how the body uses stored fat to produce energy.
Capturing the cosmic 'drift' before a star is born
Stars like our sun are formed from the collapse of stellar objects called prestellar cores, cold and dense concentrations of gas and dust held together by gravity. While many questions remain about the exact mechanisms of star formation, advanced radio telescopes have given resea
Intricate molecular mechanisms help bacteria evade immune detection
Northwestern Medicine scientists have identified a novel mechanism used by the bacteria responsible for gonorrhea to evade immune detection and achieve widespread infection, according to a recent study published in the Proceedings of the National Academy of Sciences. Neisseria go
Quantum-gravitational mechanism could explain the universe's homogeneity
Quantum-gravitational mechanism could explain the universe's homogeneity
Our universe is known to be remarkably homogeneous and isotropic. This essentially means that matter is distributed evenly throughout the universe and that it looks almost the same in all directions.
Scientists uncover molecular mechanism linking water-saving irrigation to cadmium accumula
Scientists uncover molecular mechanism linking water-saving irrigation to cadmium accumula
Water-saving irrigation practices, including intermittent irrigation, are essential for sustainable rice cultivation amid growing freshwater shortages. However, periodic drainage creates aerobic soil conditions that drastically boost cadmium (Cd) bioavailability, leading to sever