The lipid ceramide, long known to help keep skin smooth, also helps algae swim toward the light and appears to enable one type of brain cell to keep cerebrospinal fluid moving, researchers report in a new paper.
Ceramide helps make and keep in motion hairlike projections called motile cilia found in algae and in brains.
"It's important to know how you regulate your cilia because they can become dysfunctional by stroke, by Alzheimer's, by inflammation, even by aging," said Dr. Erhard Bieberich, neuroscientist in the Medical College of Georgia Department of Neuroscience and Regenerative Medicine.
Chemsex, the unfortunately chosen term for sex under the influence of illegal drugs (unfortunate because it connotes chemistry with illegal, when love is clearly a chemistry event in the brain) - needs to become a public health priority, argue experts in The BMJ. This intentional sex under the influence of psychoactive drugs occurs mostly among gay men.
Chemsex usually refers particularly to the use of mephedrone, gamma-hydroxybutyrate (GHB), gamma-butyrolactone (GBL), and crystallized methamphetamine. The drugs are often used in combination to facilitate sexual sessions lasting several hours or even days, with multiple sexual partners.
Because light travels far faster than sound, we see distant events before we hear them. Perhaps as a child you learned to count the seconds between a lightning flash and the sound of thunder to estimate its distance.
A new paper says that our brains can also detect and process sound delays that are too short to be noticed consciously. And they found that we use even that unconscious information to fine tune what our eyes see when estimating distances to nearby events.
In a new study, infants remained calm twice as long when listening to a song as when listening to speech. The study involved thirty healthy infants aged between six and nine months.
Humans like music biologically, according to one hypothesis. In adults and older children, this "entrainment" may be displayed by behaviors such as foot-tapping, head-nodding, or drumming.
"Emotional self-control is obviously not developed in infants, and we believe singing helps babies and children develop this capacity," says Professor Isabelle Peretz of the University of Montreal.
In the film version of "The Martian", the main character is trapped on the red planet and is forced to figure out how to grow food. He declares he is going to "science the s--t out of" the issue before instead engaging in regular old agriculture mixed with some engineering.
But science may soon help, researchers have discovered a gene that could open the door for space-based food production. Professor Peter Waterhouse, a plant geneticist at QUT, discovered the gene in the ancient Australian native tobacco plant Nicotiana benthamiana, known as Pitjuri to indigenous Aboriginals tribes, which has been used for decades as a model plant upon which to test viruses and vaccines.
Want to be an athlete but think it is too much work?
Psychoactive drugs may be the answer.
Let's face it, exercise is a lot of work. Our ancestors worked all of the time and they lived to be 35 so we have clearly evolved to be lazy. Effort is the largest barrier to why people do not exercise so Professor Samuele Marcora at University of Kent suggests that reducing perception of effort during exercise using caffeine or other psychoactive drugs (e.g. methylphenidate and modafinil) could help many people stick to their fitness plans. By fooling them into thinking it is less effort than it is.
Products like milk have been fortified with Vitamin D for decades because of its importance in uptake of calcium in the bones, along with other cellular and immune processes. The body creates vitamin D in the form of cholecalciferol within the skin itself, if there is a sufficient amount of sunlight.
A new survey reveals that couples enjoyed more frequent and satisfying sex for both partners when men made a fair contribution to housework. The same paper also says there's no relationship between the amount of housework male partners completed and the sexual functioning of a couple.
Using solar or wind power to produce carbon-based fuels is a self-defeating approach to making a greener world, but when governments decide to engage in advocacy rather than science, and throw money at problems, bad corporate habits are learned. Instead of funding more basic research to make green energy viable, the White House opted to engage China in a price war on solar panels, and $72 billion later we have the same issues.
Methane hydrates are a kind of ice that contains methane, and that
form at certain depths under the sea or buried in permafrost. They can also form in pipelines that transport oil and gas, leading to clogging. Yet methane hydrates are nearly impossible to study because it is very hard to get samples, and the samples themselves are highly unstable in the laboratory.
A team of scientists from Norway, China and the Netherlands has now shown how the size of grains of the molecules that make up the natural structure of methane hydrates determines how they behave if they are loaded with weight or disturbed.
Public health policies targeted at smokers may actually have the opposite effect for some people trying to quit, according to a paper which indicates that stigmatizing smoking can, in some cases, make it harder for people to quit because they become angry and defensive and the negative messages lead to a drop in self-esteem.
In the 1970s, scientists used genetic modification to insert the gene for human insulin production into yeast and bacteria cells. They turned those cells into tiny insulin factories, meaning insulin no longer had to be created from animal pancreases, which created allergy issues. This was a breakthrough for science and two generations of people have benefited from this GMO insulin.-->
Human embryonic stem cells (hESCs) technology has been around since the late 1990s and became a political football in the early 2000s when President George W. Bush made federal funding for it available for the first time, but limited it to existing lines, which made the NIH happy but was quickly pounced on by his opponents as a "ban."
Living hominoids are a group of primates that includes the small-bodied apes (the lesser apes, or gibbons and siamangs, which constitute the family Hylobatidae) and the larger-bodied great apes (orangutans, gorillas and chimpanzees), which, along with humans, belong to the family Hominidae.
All extant hominoids share several features, such as the lack of external tail, an orthograde body plan that enables an upright trunk position, and several cranial characteristics. All these features might have been present in the common ancestor of hominids and hylobatids that, according to molecular data, would have lived about 15-20 million years ago.
38 percent of state public health workers plan to leave the public health workforce by 2020 but it isn't just retirement, they want to get out of a health care system that is even more micromanaged and financially motivated that when HMOs and insurance companies were the big problem - government control.
The article in Journal of Public Health Management and Practice (JPHMP) is based on the Public Health Workforce Interests and Needs Survey (PH WINS), the largest-ever study of the public health workforce.
Vitamin D supplements have been linked tp everything but improved exercise performance in 2015 - and a preliminary study presented today at the Society for Endocrinology annual conference in Edinburgh took care of that. Plus claiming this supplement will lower the risk of heart disease.
Vitamin D, which is both a vitamin and a hormone, helps control levels of calcium and phosphate in the blood and is essential for the formation of bones and teeth. Sources of Vitamin D include oily fish and eggs, but it can be difficult to get enough through diet alone. Most people generate vitamin D by exposing their skin to ultraviolet B rays in sunlight.
For millennia, Greenland's ice sheet reflected sunlight back into space but satellite measurements in recent years suggest the bright surface is darkening, causing solar heat to be absorbed and surface melting to accelerate.
Some studies suggest this "dirty ice" or "dark snow" is caused by fallout from fossil fuel pollution and forest fires; soot or dust.
But a new study says the readings are just degrading satellite sensors and the ice sheet hasn't lost as much reflectivity as previously thought, and that black carbon and dust concentrations haven't increased significantly and are thus not responsible for darkening on the upper ice sheet.
A team of astronomers is proposing that huge spiral patterns seen around some newborn stars, merely a few million years old (about one percent our sun's age), may be evidence for the presence of giant unseen planets. This idea not only opens the door to a new method of planet detection, but also could offer a look into the early formative years of planet birth.
Though astronomers have cataloged thousands of planets orbiting other stars, the very earliest stages of planet formation are elusive because nascent planets are born and embedded inside vast, pancake-shaped disks of dust and gas encircling newborn stars, known as circumstellar disks.