During their life, plants constantly renew themselves. They sprout new leaves in the spring and shed them in the fall. No longer needed, damaged or dead organs such as blossoms and leaves are also cast off by a process known as abscission. By doing so, plants conserve energy and prepare for the next step in their life cycle.

But how does a plant know when it is the right time to get rid of unnecessary organs? It is regulated by receptor proteins located at the surface of specific cells that form a layer around the future break point. When it is time to shed an organ, a small hormone binds to this membrane receptor and, together with a helper protein, the abscission process is initiated. Their findings are now published in the journal eLife.

Methane, the abundant and inexpensive natural gas, is often burnt off around the world at oil fields and refineries but it's a great energy source and base material for the chemical industry, if only there was a viable way to put it in liquid form, which is easier to transport and more reactive.

A 20 percent tax on sugar-sweetened drinks would result in widespread, long-lasting public health benefits and significant health cost savings, an estimated $400 million a year and reduce annual health expenditure by up to $29 million, according to a computer model.

A phase I study of the drug LOXO-101 appears to significantly reduce tumors in patients with varied types of genetically defined cancer, according to a study led by The University of Texas MD Anderson Cancer Center.

The results of the study, which followed patients with unique proteins called tropomyosin receptor kinase fusions (TRKs), were presented at the American Association for Cancer Research's annual meeting held April 16-20 in New Orleans.

"We saw efficacy with significant tumor regression in all six TRK fusion patients enrolled in the study," said David Hong, M.D., associate professor of Investigational Cancer Therapeutics. "We were surprised by the fact that the study demonstrated efficacy in every one of the TRK fusion-positive patients."

Encountering information suggesting that it may be tough to find a romantic partner shifts people's decision making toward riskier options, according to new findings from a series of studies published in Psychological Science, a journal of the Association for Psychological Science.

"Environmental cues indicating that one will have a relatively difficult time finding a mate can drive people to concentrate their investment choices into a few high-risk, high-return options," says psychological scientist Joshua Ackerman of the University of Michigan, lead author on the research. "This is true even when the decisions people are making are not explicitly relevant to romantic outcomes."

Researchers have characterized the prevalence and risk factors of fatty liver disease in patients who undergo liver transplantation. The findings, which are published in Liver Transplantation, a journal of the American Association for the Study of Liver Diseases, could have important implications for safeguarding transplant recipients' health.