Titanium dioxide (TiO2) nanoparticles are found in everything from cosmetics to sunscreen to paint and vitamins, and have caused systemic genetic damage in mice, according to a study conducted by researchers at UCLA’s Jonsson Comprehensive Cancer Center. The study appears this week in the journal Cancer Research.
Whether you're a liberal or a libertarian, it's generally accepted across the political spectrum that, in some form, the opportunity to make a lot of money drives the economic recessions and depressions the global economy experiences.
Since we seem doomed to repeat the mistakes that brings us to the brink of economic meltdown every few decades, is there perhaps a scientific explanation for our behavior?
According to a study soon to appear in Cortex, monetary gain, or even the mere possibility of receiving a reward, is known to activate an area of the brain called the striatum, and high-risk/high-gain decisions cause higher levels of activation than more conservative decisions.
Researchers from North Carolina State University have identified a gene, FoxJ1, that tells embryonic stem cells in the brain when to stop producing neurons. The research is a significant advance in understanding the development of the nervous system, which is essential to addressing conditions such as Parkinson's disease, Alzheimer's disease and other neurological disorders.
The bulk of neuron production in the central nervous system takes place before birth, and comes to a halt by birth. But scientists have identified specific regions in the core of the brain that retain stem cells into adulthood and continue to produce new neurons.
A study published today in Nature Geoscience says that increasing atmospheric CO2 emissions continue to outstrip the world's natural ability to absorb carbon and claim that drastic cuts in fossil fuel emissions are the only way to mitigate climate change.
The authors report that over the last 50 years the average fraction of global CO2 emissions that remained in the atmosphere each year was around 43 per cent - the rest was absorbed by the Earth's carbon sinks on land and in the oceans. During that time the fraction has likely increased from 40 per cent to 45 per cent, suggesting a decrease in the efficiency of the natural sinks. The team also offers evidence that the sinks are responding to climate change and variability.
Despite widespread educational efforts aimed at helping the public make healthy choices, it's understood among experts that people often fail to comply with the advice offered by their doctors and others in the health community.
To correct this deficiency in compliance, some researchers are now proposing that text messaging be used to send out health tips to consumers. Given it's popularity and low expense, they say, regular text messaging may be just the thing to prompt people to make behavioral changes for the sake of health
A potentially dangerous level of carbon dioxide and methane gas haunts Lake Kivu, the freshwater lake system bordering Rwanda and the Republic of Congo.
Scientists can't say for sure if the volatile mixture at the bottom of the lake will remain still for another 1,000 years or someday explode without warning. In a region prone to volcanic and seismic activity, the fragility of Lake Kivu is a serious matter. Compounding the precarious situation is the presence of approximately 2 million people, many of them refugees, living along the north end of the lake.