Showing 20 articles starting at article 2341
< Previous 20 articles Next 20 articles >
Categories: Biology: Biochemistry, Biology: Cell Biology
Published Fossils of a saber-toothed top predator reveal a scramble for dominance leading up to 'the Great Dying'
(via sciencedaily.com) Original source A tiger-sized saber-toothed creature called Inostrancevia has previously only been found in Russia. But scientists have discovered its fossils in South Africa, suggesting that it migrated 7,000 miles across the supercontinent Pangaea during the world's worst mass extinction 252 million years ago. Heading to South Africa allowed it to fill a gap in a faraway ecosystem that had lost its top predators.
Published Corals mark friendly algae for ingestion -- revealing possible conservation target
(via sciencedaily.com) Original source Biologists reveals how coral cells tag friendly algae before ingesting them, initiating a mutually beneficial relationship. This information could guide next-level coral conservation efforts.
Published Nitrate: Healthy heart or cancer risk? Meet nutrition's Jekyll and Hyde
(via sciencedaily.com) Original source For a long time nitrate has been viewed warily, with previous research showing it could potentially be linked to causing cancer. However, it has subsequently bee revealed to have various cardiovascular health benefits. So, which is it? A new review of dietary nitrate research shows the answers to its health benefits or risks may lie in where it is sourced from.
Published Puppeteer fungus' targeted takeover of 'zombie' flies
(via sciencedaily.com) Original source Researchers reveal the molecular and cellular underpinnings behind the parasitic fungus, Entomophthora muscae's (E. muscae), ability to manipulate the behavior of fruit flies.
Published Synthetic biology: proteins set vesicles in motion
(via sciencedaily.com) Original source Biophysicists have designed a new cell-like transport system that represents an important milestone on the road to artificial cells.
Published Fossil of mosasaur with bizarre 'screwdriver teeth' found in Morocco
(via sciencedaily.com) Original source Scientists have discovered a new species of mosasaur, a sea-dwelling lizard from the age of the dinosaurs, with strange, ridged teeth unlike those of any known reptile. Along with other recent finds from Africa, it suggests that mosasaurs and other marine reptiles were evolving rapidly up until 66 million years ago, when they were wiped out by an asteroid along with the dinosaurs and around 90% of all species on Earth.
Published Cancer cells use a new fuel in absence of sugar
(via sciencedaily.com) Original source Researchers have discovered a new nutrient source that pancreatic cancer cells use to grow. The molecule, uridine, offers insight into both biochemical processes and possible therapeutic pathways. The findings show that cancer cells can adapt when they don't have access to glucose.
Published Perfect 'pathogen' storm: Vibrio bacteria, Sargassum and plastic marine debris
(via sciencedaily.com) Original source Little is known about the ecological relationship of Vibrio bacteria with Sargassum. Evidence also is sparse as to whether vibrios colonizing plastic marine debris and Sargassum could potentially infect humans. As summer kicks off and efforts are underway to find solutions to repurpose Sargassum, could these substrates pose a triple threat to public health? Results of a study representing the first Vibrio spp. genome assembled from plastic finds Vibrio pathogens have the unique ability to 'stick' to microplastics, harboring potent opportunistic pathogens.
Published Watch these cells rapidly create protrusions for exploration and movement
(via sciencedaily.com) Original source In order to move, cells must be able to rapidly change shape. A team of researchers show that cells achieve this by storing extra 'skin' in folds and bumps on their surface. This cell surface excess can be rapidly deployed to cover temporary protrusions and then folded away for next time.
Published Scales or feathers? It all comes down to a few genes
(via sciencedaily.com) Original source Scales, spines, feathers and hair are examples of vertebrate skin appendages, which constitute a remarkably diverse group of micro-organs. Despite their natural multitude of forms, these appendages share early developmental processes at the embryonic stage. Researchers have discovered how to permanently transform the scales that normally cover the feet of chickens into feathers, by specifically modifying the expression of certain genes.
Published Adult friendships can triumph over childhood trauma, even in baboons
(via sciencedaily.com) Original source Drawing on 36 years of data, a new study of 199 baboons in southern Kenya finds that adversity early in life can take years off the lifespan, but strong social bonds with other baboons in adulthood can help get them back. Baboons who formed stronger social bonds -- measured as how often they groomed with their closest friends -- added 2.2 years to their lives, no matter what hardships they faced when they were younger.
Published Assessing emotions in wild animals
(via sciencedaily.com) Original source A new study examines indicators of mental wellbeing in wild animals to improve conservation efforts.
Published What did the earliest animals look like?
(via sciencedaily.com) Original source Surprisingly, genome comparisons have failed to resolve a major question in animal evolution: Which living animals are the descendants of the earliest animals to evolve in the world's oceans? Scientists performed a detailed chromosomal analysis that comes down definitively in favor of comb jellies, or ctenophores, as the most recent common ancestor of all animals, or the sister taxa to all animals. Sponges evolved later.
Published A channel involved in pain sensation can also suppress it
(via sciencedaily.com) Original source Pain is good. It's the body's way to keep an animal from harming itself or repeating a dangerous mistake. But sometimes the debilitating sensation can get in the way. So evolution has devised ways to tamp that response down under certain circumstances.
Published Researchers pinpoint brain cells that drive appetite in obesity
(via sciencedaily.com) Original source A group of brain cells discovered by researchers reveals a potential new approach to anti-obesity treatment.
Published An edible CBD coating could extend the shelf life of strawberries
(via sciencedaily.com) Original source Soon, you'll be able to get a box of freshly picked, sweet strawberries from the grocery store or local farm stand. But it's disappointing when you get them home and find that the ones at the bottom have started to rot. To increase the berries' shelf life, researchers have incorporated cannabidiol -- a non-hallucinogenic compound from cannabis known as CBD -- and sodium alginate into an edible antimicrobial coating.
Published Researchers reveal DNA repair mechanism
(via sciencedaily.com) Original source A new study adds to an emerging, radically new picture of how bacterial cells continually repair faulty sections of their DNA.
Published Rare tropical plant gains appetite for meat
(via sciencedaily.com) Original source Under certain circumstances, a rare tropical plant develops into a carnivore. A research team has now deciphered the mechanism responsible for this.
Published How superbug A. baumannii survives metal stress and resists antibiotics
(via sciencedaily.com) Original source The deadly hospital pathogen Acinetobacter baumannii can live for a year on a hospital wall without food and water. Then, when it infects a vulnerable patient, it resists antibiotics as well as the body's built-in infection-fighting response. The World Health Organization (WHO) recognizes it as one of the three top pathogens in critical need of new antibiotic therapies. Now, an international team, led by Macquarie University researchers Dr. Ram Maharjan and Associate Professor Amy Cain, have discovered how the superbug can survive harsh environments and then rebound, causing deadly infections. They have found a single protein that acts as a master regulator. When the protein is damaged, the bug loses its superpowers allowing it to be controlled, in a lab setting. The research is published this month in Nucleic Acids Research.
Published Researchers discover brain circuit underlying spontaneous synchronized movement of individuals in groups
(via sciencedaily.com) Original source Individual fish in schools scatter in unison when a predator is in their midst. Such precisely coordinated group movements and immobility during threats have long been observed in insects and mammals. Now, a brain pathway has been discovered that enables individual animals to rapidly coordinate a unified response, with no rehearsal required.