Craig Montell is a professor at the University of California, Santa Barbara, who helped lead the research. He said in a statement that by removing the two eye receptors, the team was able to “eliminate CO2-induced target recognition without causing blindness.”
Female Aedes aegypti search out blood meals in humans to develop eggs. They use several different senses to find those meals. One of the main identifying tools is the smell of carbon dioxide (CO2). When a human breathes out CO2, the mosquitoes become more active and begin looking for targets to bite.
The research team said this search generally begins with the mosquito flying toward the direction of the released CO2. When seeking out targets, the insects search for dark objects. Once the mosquitoes are within close range, they can also sense heat from skin and additional skin smells to help guide them to a human.
The researchers used the CRSPR/Cas-9 gene editing method to remove two out of five light-sensing receptors in the mosquitoes’ eyes. They say taking away these receptors blocked the ability of the female Aedes aegypti to recognize dark targets.
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What do you do at different times in the day? What do you eat? How do you interact with your neighbors? These are some of the questions that biologists would love to ask communities of microbes, from those that live in extreme environments deep in the ocean to those that cause chronic infections in humans. Now, a new technique developed at Caltech can answer these questions by surveying gene expression across a population of millions of bacterial cells while still preserving the cells’ positions relative to one another.
The technique can be used to understand the wide variety of microbial communities on our planet, including the microbes that live within our gut and influence our health as well as those that colonize the roots of plants and contribute to soil health, to name a few.
The technique was developed at Caltech by Daniel Dar, a former postdoctoral scholar in the laboratory of Dianne Newman, Gordon M. Binder/Amgen Professor of Biology and Geobiology and executive officer for biology and biological engineering, and by Dr. Nina Dar, a former senior research technician in the laboratory of Long Cai, professor of biology and biological engineering. Daniel Dar is now an assistant professor at the Weizmann Institute of Science in Israel. A paper describing the research appears on August 12 in the journal Science.
A pesticide that’s been linked to neurological damage in children, including reduced IQ, loss of working memory, and attention deficit disorders, has been banned by the Biden administration following a years-long legal battle.
Agency officials issued a final ruling on Wednesday saying chlorpyrifos can no longer be used on the food that makes its way onto American dinner plates. The move overturns a Trump-era decision.
A local entrepreneur in the Japanese tourist destination of Nara has developed an alternative to plastic shopping bags, to protect the town’s sacred deer.
Hidetoshi Matsukawa, who works for Nara-ism, a souvenir wholesale agent, told CNN he heard last year that the deer, which roam the city’s park, were dying after ingesting plastic bags.
“I wanted to do something to protect the deer, which is the symbol of Nara,” he said.
In order to feed a projected 9 billion people by 2,050 farmers need to grow 50% more food on a limited amount of arable land. As a result, plant scientists are in a race against time to engineer crops with higher yields by improving photosynthesis.
Blue-green algae (cyanobacteria) are known to photosynthesize more efficiently than most crops, so researchers are working to put elements from cyanobacteria into crop plants.
A new study describes a significant step towards achieving that goal. “Absence of Carbonic Anhydrase in Chloroplasts Affects C3 Plant Development but Not Photosynthesis,” published on August 11 2021, in the Proceedings of the National Academy of Sciences.
Pet food uses some of the worst meat, and creating a market for it helps keep industrial agriculture afloat. So why should humans eat all the cultured meat?
Engineers at the University of Pennsylvania have found a new way to build and package microbatteries that drastically improve energy and power density even at the smallest sizes. They developed a new kind of current collector and cathode that increases the fraction of materials that store energy while simultaneously serving as a protective shell. This reduces the need for non-conductive packaging that normally protects a battery’s sensitive internal chemicals.
It weighs the same as two grains of rice but has the energy density of a much larger, heavier battery.
