Articles tagged with Mouth
A series of studies by NYU researchers found that e-cigarette users have a distinct oral microbiome less healthy than nonsmokers but potentially healthier than cigarette smokers. The study also reveals altered immune responses, including increased inflammation and suppression of immune reactions.
A recent study found that a subset of immune cells within the alveolar bone marrow were activated by the presence of commensal oral microbes, leading to increased osteoclast-mediated bone resorption and bone loss. Reducing the burden of commensal microbes through oral antiseptic rinses can help protect against alveolar bone loss.
A recent study published in Scientific Reports found that chewing food thoroughly increases energy expenditure through diet-induced thermogenesis (DIT), which helps prevent obesity. The study involved participants who chewed liquid food for varying durations, revealing that prolonged chewing and tasting increased DIT, gas exchange, pro...
Researchers at Tel Aviv University discovered seahorses can move their head up to catch prey at incredible speeds, facilitated by a powerful flow of water and spring-like mechanism. This study sheds light on the ecology of seahorses, revealing that longer noses enable stronger suction currents for catching smaller prey.
Researchers found that children tend to have similar levels of sulfur volatiles in their saliva as their parents, suggesting shared oral microbiomes. Children who produce high amounts of sulfur volatiles dislike raw Brassica vegetables the most.
Researchers explore how smell influences flavor perception, finding that participants performed better when unfamiliar scents were introduced without labels. This study suggests cognitive strategy and learning play a key role in aroma detection.
A study found that counterfeit dominance negatively impacts Anglo-American consumers' perceptions of authentic luxury fashion brands, while having little effect on Asian consumers. This is due to cultural differences in social-adjustive attitudes, with Anglo-Americans relying more on outgroups and Asians on ingroups.
Researchers at Chinese Academy of Sciences have uncovered the atomic structure of SLAC1, a protein responsible for closing stomatal pores in plants. The discovery sheds light on how plants respond to environmental changes, such as high CO2 levels and drought.
A study published in JAMA Internal Medicine shows that wearing two face coverings can significantly improve filtration efficiency, especially when properly fitted. Researchers found that cloth masks placed over surgical masks or vice versa can improve fit and effectiveness, but loosely fitting masks do not provide the same benefit.
A study by the University of Helsinki found that event horses wearing thin or thick bits had a greater risk of moderate or severe oral lesions compared to those wearing medium-sized bits. The research recommends using a jointed bit of moderate thickness, particularly for mares and certain horse breeds.
A new species of manta-like planktivorous shark, Aquilolamna milarcae, was discovered in northern Mexico, revealing an unexpectedly early evolutionary experimentation with underwater flight. The ancient shark's unique features included long, slender pectoral fins and a wide mouth adapted for filter-feeding.
Researchers found that marketing perks can foster positive word-of-mouth without being used as explicit incentives, but their effectiveness depends on how they are framed. Perks with fewer strings attached can nudge consumers to generate positive WOM, making behavior-reward contingencies clear and salient.
Two types of mouthwash, Listerine and Chlorhexidine, disrupt the COVID-19 virus in laboratory conditions, preventing replication. Other mouthwashes like Betadine and Peroxal show promise but have significant skin cell killing properties.
A Northwestern University study found that bacteria on used toothbrushes reflect microbial communities in the mouth and skin, not the toilet. The research, published in Microbiome journal, suggests that microbes from the human body are transferred to toothbrushes through saliva and other bodily fluids.
Researchers confirm COVID-19 is the primary cause of lost sense of smell in patients with respiratory infections. The disease also affects taste and other senses in the mouth, leading to prolonged discomfort for patients.
Computational simulations reveal that fast walking in narrow corridors creates a higher transmission risk for COVID-19. The shape of the space and airflow patterns behind an individual playing a significant role in this outcome. Children are particularly vulnerable due to the trailing of virus-laden droplets at mouth level.
A study has found that certain types of mouth bacteria are associated with an increased risk of lung cancer in non-smokers. The findings suggest that a wider range of bacterial species is linked to a lower risk, while specific types like Firmicutes and Spirochaetes may contribute to heightened risk.
Resusci Annie is a plaster death mask created from an unknown woman found in the River Seine in 19th century Paris. Her face has been used in CPR training for over 50 years, helping to save an estimated 2.5 million lives, and inspiring songs like Michael Jackson's Smooth Criminal.
A study by the University of Plymouth and UOC assessed the impact of physical exercise on oral microbiota, finding that alterations to buccal bacteria reduce cardiovascular benefits. The study highlights the importance of diet, hydration, and chewing in maintaining oral health and improving sporting performance.
A team of scientists from the University of Leeds has developed a new hydrogel to act as an alternative to saliva without additional lipid content. The formulation can also replicate lubricating properties in food products, providing a potential solution for dry mouth therapy and non-obesogenic nutritional technologies.
A new study in Marketing Science suggests that when consumers learn about products from others, high-quality businesses should increase their advertising spending to prove quality. Conversely, when all consumers share their experiences, a high-quality business may benefit from reducing its ad spend.
Researchers found that ordinary conversation creates a conical 'jet-like' airflow that quickly carries tiny droplets from a speaker's mouth across meters of an interior space. This can lead to the transmission of diseases like COVID-19, even in the absence of visible symptoms.
A recent study suggests that home-made cloth face masks with at least two layers are more effective in reducing the dispersal of viral droplets from the nose and mouth associated with COVID-19. The researchers found that a double layer covering was better than a single layer in reducing droplet spread from coughing and sneezing.
A new study reveals that poor oral health can exacerbate gut inflammation in IBD patients, potentially leading to reduced quality of life and surgery. The research suggests that promoting oral health could improve clinical outcomes in IBD, making it a crucial aspect of total body health.
Researchers found chimpanzees produce lip-smacks at a speech-like rhythm of 4.15 Hz, confirming the existence of a continuous path in the evolution of primate mouth signals with this rhythm. This discovery supports the theory that spoken language evolved from existing primate communication systems.
Researchers discovered how to make bottles empty faster by studying bubble dynamics, which reveals key parameters such as liquid film thickness and rise velocity. The study also identifies two distinct bottle-emptying modes and a critical angle of inclination that maximizes the emptying time.
A recent study published in Ophthalmology found no virus detected in the tears of infected patients with COVID-19, suggesting a low risk of transmission through this route. The study's authors hope their findings will guide further research into preventing virus transmission through more significant routes.
International team discovers two new species of six-gilled sawsharks in the West Indian Ocean, raising concerns about their vulnerability to overfishing. The discovery highlights the importance of assessing shark and ray biodiversity globally.
A recent study published in Frontiers in Cellular and Infection Microbiology found that re-initiating oral food intake after enteral nutrition alters the composition of both oral and gut microbiota. This alteration was associated with improved balance and function in the microbiome, particularly in fatty acid metabolism.
A crowd-sourced study found that people who floss regularly have lower microbial diversity in their mouths than non-flossers, and adults with recent dental visits have less of the periodontal disease-causing oral pathogen. The study also uncovered a possible link between childhood obesity and periodontal disease.
A recent study analyzed the antimicrobial resistance genes in the mouth and gut microbiome, finding distinct resistome profiles with varying levels of diversity. The researchers' findings suggest that expanding human resistome studies to other body areas is crucial for understanding the spread of antibiotic resistance.
Researchers unveil molecular mechanisms governing saliva's lubrication properties, resolving distinct roles played by mucin- and non-mucinous proteins. Hydrated mucin forms a mesh-like nano-reservoir trapping water molecules, while positively-charged small molecular proteins aid boundary lubrication.
Researchers from Ohio University used 3D imaging to discover multiple heat exchangers in dinosaur heads and found that giant dinosaurs evolved different cooling systems to combat heat stroke. Different species focused on specific regions, such as the nasal cavity or mouth, to regulate brain temperature.
Researchers found that infants with stable, large bacterial clusters had improved respiratory health. The study's findings suggest that early-life interventions could prevent respiratory infections by shaping microbial communities across the body.
A new study describes a 2-foot long shark with jaws capable of suction feeding, 50 million years older than the earliest evidence in bony fishes. The fossil, analyzed using CT imaging and modeling software, shows that ancient sharks responded quickly to ecological opportunities after major extinctions.
Research found that common mouth bacteria responsible for acute periodontitis fared better when paired with bacteria and other microbes from outside the mouth, including those found in the colon or dirt. This suggests that not all relationships within a microbiome are cooperative, and some may have 'high fences' and share sparsely.
A study by University of Helsinki found that 84% of Finnish trotters had soft tissue damage in the bit area, with mild, moderate, and severe lesions detected. The researchers hope their developed classification system will facilitate comparative research.
A new study from Queen Mary University of London found that the 'love hormone' oxytocin plays a crucial role in the feeding behavior of European starfish. When injected into the starfish, oxytocin induces fictive feeding, causing them to behave as if they are eating prey despite no actual food being present.
A new computer software can detect genuine facial expressions, especially around the eyes. Researchers at the University of Bradford used a video analysis method to identify differences between real and posed smiles, finding that the eyes show more movement in genuine expressions.
The GPM Core Observatory captured estimates of rainfall rates within Tropical Storm Barry, with storm top heights reaching up to 18 kilometers. Flooding due to heavy rainfall is the primary threat, with intense thunderstorm activity expected to strengthen the storm.
NASA's Aqua satellite detected a potential tropical cyclone in the Gulf of Mexico, with extremely cold cloud tops indicating heavy rain. The storm is moving westward and has the potential to strengthen into a hurricane by Friday.
Researchers call for better diagnosis and treatment protocols due to misdiagnosis, resource waste, and patient discomfort associated with BMS. The condition's symptoms can be easily treated if underlying causes are identified.
In a study on Egyptian fruit bats, researchers found that females consistently take food from male peers and eventually mate with them. The findings support the 'food-for-sex' hypothesis in this species.
Female Egyptian fruit bats form bonds with male producers and exchange mating for nourishment. The study found that females give birth to pups of the males they most often scrounge food from, supporting the hypothesis that females trade mating for food.
A new study published in Management Science found that post-release piracy increases revenue by 3% due to word of mouth effects, while pre-release piracy has a negative impact. The researchers used real-world data from online piracy sites and analyzed the effect on movie revenues.
A recent study by Cornell University has discovered a strong correlation between the AMY1 gene, which breaks down starch, and specific gut bacteria. This finding suggests that people with more copies of this gene may have benefited from increased starch digestion during times of scarcity.
Scientists discover that comb jellies evolved from ancestors with polyp-like tentacles on the sea floor, which later developed into balloon-like spheres and comb-like structures. The discovery repositions comb jellies alongside corals and jellyfish in the evolutionary tree of life.
The new in vitro method allows scientists to easily screen different compositions of the carrier liquid and concentration of particulates, reducing mouth residue and making swallowing easier. This innovative test is expected to help develop novel medicines that improve the lives of people with difficult swallowing capabilities.
Researchers analyzed 2,400 languages to understand how human diets impact consonant prevalence. A biomechanical model revealed that a shift from hunter-gatherer to agricultural societies led to changes in bite configuration and labiodental sound distribution.
Researchers suggest that impacts on the side of the head cause vibrations in a structure connected to the corpus callosum, potentially leading to concussion symptoms. Magnetic resonance imaging scans revealed possible damage to the corpus callosum in athletes with concussions.
A new species of stiletto snake, Atractaspis branchi, has been discovered in the western Upper Guinea forests. The snake can attack and stab sideways with its fangs sticking out of the corner of its mouth, making it difficult to handle.
Researchers at the University of Washington have created a robotic system that can strategize how to use a fork to pick up and deliver bites to a person's mouth. The robot used an object-detection algorithm and a new skewing-and-feeding strategy to successfully pick up hard foods but struggled with soft foods.
A large breakthrough has been made in understanding the genetic causes of mouth ulcers, identifying 97 genome regions linked to the condition. These findings hold promise for developing new treatments and drugs to prevent or heal mouth ulcers, which affect up to 25% of young adults.
Researchers used eye-tracking technology to demonstrate that people don't need to mindfully look at eyes to be perceived as making eye contact during conversation. Participants rated their enjoyment of conversations equally regardless of researcher's gaze direction.
Researchers model the hagfish's unique slime production, discovering it relies on hydrodynamic forces to unspool microscopic threads. This finding has implications for understanding biological gels and their applications in industries and medicine.
A study by Society for Consumer Psychology found that hiding information about consumption choices increases sense of connection. Researchers conducted experiments where participants were asked to keep their brand choices secret, revealing that secrecy intensified self-brand connections and increased loyalty.
High levels of air pollutants, especially PM2.5, may be associated with an increased risk of developing mouth cancer, according to the first study of its kind. The study found that exposure to high levels of PM2.5 was linked to a 43% heightened risk of a mouth cancer diagnosis.
A study by University of California - Riverside researchers found that mouth injuries caused by hook removal after catch-and-release fishing reduce feeding performance in suction-feeding fish, including bass, salmon, and trout. The study suggests that fishing-induced injuries impact a fish's ability to feed while the mouth is healing.
Researchers studied manta ray filtration using physical modeling and CFD, discovering a novel non-clogging mechanism that resists clogging. The 'ricochet' separation process allows water to pass through while tiny particles are eaten, promising applications for industrial wastewater treatment and reducing microplastic pollution.
NASA's Aqua satellite found three areas of strongest storms east of Gordon's center, indicating heavy rainfall potential. The storm's cloud top temperatures were near minus 70 degrees Fahrenheit, capable of generating heavy rainfall.