We're bombarded with information at all times, so much that if we had to try and process it all times, we'd be paralyzed. Our cerebellum does information damage control by filtering out what changes. Evolution made it possible for us to conserve energy while still processing anomalies quickly.
For hundreds of millions of people around the world, chewing betel nut produces a cheap, quick high but also raises the risk of addiction and oral cancer.
The betel nut, a seed of the areca palm, is grown and used throughout India, parts of China and much of Southeast Asia, including Indonesia and most of the Pacific islands. Chewing the betel quid -- a mixture of areca nut, spices and slaked lime wrapped in betel vine leaves -- has been a cultural tradition in those regions for centuries. In small doses, it creates a sense of euphoria and alertness. Prolonged use can create addiction and the World Health Organization classifies the betel nut as a carcinogen.
In a new thesis, 60 garments from Swedish and international clothing chains have been tested and though around a hundred chemicals were preliminary identified, several of the substances were not on the producers' lists and are suspected to be by-products, residues or chemicals added during transport.
Dependent on occurrence, quantity, toxicity and how easily they may penetrate the skin, four groups of substances were chosen for further analysis. The highest concentrations of two of these, quinolines and aromatic amines, were found in polyester. Cotton contained high concentrations of benzothiazoles, even clothes made from organic cotton.
Understanding of methane-metabolizing organisms might have to be rethought after researchers announced discovery of two new ones.
The discovery of the novel methane-metabolizing microorganisms was made using techniques that sequence DNA on a large scale and assemble these sequences into genomes using advanced computational tools.
"Traditionally, these type of methane-metabolizing organisms occur within a single cluster cluster group of microorganisms called Euryarchaeota. This makes us wonder how many other types of methane-metabolizing microorganisms are out there?" asked Gene Tyson, associate professor and Deputy Head of University of Queensland's Australian Centre for Ecogenomics in the School of Chemistry and Molecular Biosciences.
The identification of a protein that selectively clears damaged chloroplasts from plant cells reveals how plants maintain a "clean workshop" during the process of photosynthesis. Chloroplasts play an important role in transforming light into useable energy for plants, but when these energy powerhouses are damaged, they release harmful substances. When the plant detects this damage, signals are sent to genes involved in chloroplast function and stress adaptation.
At 8 a.m. EDT on October 23, 2015, the National Hurricane Center said that Hurricane Patricia had grown into a monster hurricane. In fact, it is the strongest eastern north pacific hurricane on record. NASA-NOAA's Suomi NPP satellite analyzed the temperatures and structure within the storm as it passed overhead.
On October 23, a Hurricane Warning was in effect from San Blas to Punta San Telmo. A Hurricane Watch was in effect from east of Punta San Telmo to Lazaro Cardenas and a Tropical Storm Warning was in effect from east of Punta San Telmo to Lazaro Cardenas.
A year of treatment with nicotinamide, a form of vitamin B3, significantly lowered the risk of common, non-melanoma skin cancer in high-risk patients, according to a paper in the New England Journal of Medicine.
All 386 participants in the study had a history of skin cancer, increasing their risk for additional skin cancers. Taken as a twice-daily pill for 12 months, nicotinamide reduced the incidence of new non-melanoma skin cancers by 23 percent relative to placebo controls and cut the incidence of pre-cancerous sun spots by around 15 percent.
Researchers don’t always get it right. Scientists used to toiling in obscurity on arcane subjects can be lured into presenting hyperbolic conclusions from a media that demands sensational headlines, and confirmation bias remains a powerful psychological force within the scientific community. So what does the media do when honest researchers realize their attention-getting findings were simply wrong? If this case of “bee addiction” is any indicator, the answer is nothing.
Scientists from the Institute of Organic Chemistry and Biochemistry in Prague, Czech Republic, and the Max Planck Institute for Chemical Ecology in Jena, Germany, studied the pheromone chemistry of moths and discovered a new evolutionary mechanism: A single amino acid residue in desaturases − enzymes that introduce double bonds, of the tobacco hornworm Manduca sexta − switches the desaturase products from mono- and di-unsaturated to tri-unsaturated sex pheromone precursors.
Regulation of a family of brain proteins known as bromodomain and extra-terminal domain containing transcription regulators (BETs) plays a key role in normal cognition and behavior, according to a study conducted at the Icahn School of Medicine at Mount Sinai and published advanced online on September 21 and in print October 19 in The Journal of Experimental Medicine.
The Mount Sinai study focuses on epigenetics, the study of changes in the action of human genes caused by molecules that regulate when, where and to what degree our genetic material is activated, rather than focusing on genetic changes in the DNA code we inherit from our parents.
Alva-Amco Pharmacal Companies, Inc. is recommending that parents give their children a placebo - something real doctors would never do. The product they are selling is called Nauzene and they are promoting it for gastroenteritis, the inflammation of the stomach and intestinal tract that can cause nausea, vomiting, diarrhea and abdominal cramping and is commonly called "stomach flu."
The manufacturers say it will relieve upset stomach "without the added risk of salicylates found in some other remedies that can cause health issues in young children." They also say it is paraben-free and Free of artificial flavors or dyes.
A single blood test could reveal whether an otherwise healthy person is unusually likely to die of pneumonia or sepsis within the next 14 years.
Based on an analysis of 10,000 individuals, researchers have identified a molecular byproduct of inflammation, called GlycA, which seems to predict premature death due to infections.
The findings, published October 22 in Cell Systems, suggest that high GlycA levels in the blood indicate a state of chronic inflammation that may arise from low-level chronic infection or an overactive immune response. That inflammation damages the body, which likely renders individuals more susceptible to severe infections.
Like seeds, pollen loses most of its water during maturation, entering a state of suspended animation. This allows it to survive its journey from male to female organs of a flower, where it is rehydrated by sugary fluids secreted by the female organ, and springs into life again.
But rehydrating is a dangerous process, one that can kill the pollen grain before it can fertilize the egg if not properly controlled.
New research from the lab of Elizabeth Haswell, PhD, associate professor of biology in Arts&Sciences at Washington University in St. Louis, shows how pollen survives the reanimation process. A specialized protein with ancient origins helps the hydrating pollen grain relieve excessive pressure and survive the stressful transition.
