Waterhemp, a common agricultural weed, has become increasingly resistant to atrazine and other herbicides. Waterhemp uses a class of enzymes known as GSTs to detoxify herbicides, but the exact GST responsible for atrazine resistance was not known until recently. University of Illinois researchers used molecular methods to identify a gene for GST-based atrazine resistance. Knowledge of the gene will allow for easier diagnosis and could lead to the development of more targeted control options.
A Washington State University study of the chemistry of technetium-99 has improved understanding of the challenging nuclear waste and could lead to better cleanup methods.
'Discussions of climate change usually are focused on changes occurring in polar and temperate zones, but tropical regions also are expected to experience changes in regional precipitation,' said Dr. Kirk Winemiller, AgriLife Research fisheries scientist and Regents Professor in the department of wildlife and fisheries sciences at College Station.
Current treatments for rheumatoid arthritis relieve the inflammation that leads to joint destruction, but the immunologic defect that triggers the inflammation persists to cause relapses. Known as autoantibodies and produced by the immune system's B cells, these defective molecules mistakenly attack the body's own proteins in an example of autoimmune disease.
Catnip is notorious for its euphoric effects on our feline companions. What is it about catnip that makes cats go nuts, and what benefit does this have for the plants? The secret may be a chemical that has more to do with six-legged creatures than our four-legged friends. Watch the latest Speaking of Chemistry video here: https://youtu.be/G-XUpY82S18.
These maps from the USGS-led USA National Phenology Network provide a quick national overview of just how early spring is arriving: spring is now making an appearance in coastal California, southern Nevada, southeastern Colorado, central Kansas, Missouri, southern Illinois, Indiana and Ohio. It's rolling up across West Virginia and Virginia, soon to hit Philly and Indianapolis. It's already sprung - days ago -- across the southern Great Plains and SE Atlantic Coast, and it was 22 days early in DC!
Spring is coming sooner to some plant species in the low Arctic of Greenland, while other species are delaying their emergence amid warming winters. The changes are associated with diminishing sea ice cover, according to a study published in the journal Biology Letters and led by the University of California, Davis.
How can the same infection result in dramatically different levels of illness in two different people? A new study identifies two conditions -- a genetic immunodeficiency and delayed acquired immunity -- that explain why a patient developed a life-threatening disease in response to a common strain of bacterium.
Humans may have been altering Arctic sea ice longer than previously thought, according to researchers studying the effects of air pollution on sea ice growth in the mid-20th Century.
Contact tracing -- a process of identifying everyone who has come into contact with those infected by a particular disease -- combined with targeted, indoor spraying of insecticide can greatly reduce the spread of the mosquito-borne dengue virus, finds a study led by Emory University researchers funded by the National Science Foundation (NSF). The results were published today in the journal Science Translational Medicine and based on analyses from a 2009 outbreak of dengue in Cairns, Australia.