Biologists at the University of California, San Diego have discovered that Bacillus thuringiensis, or Bt — a bacterium that produces natural protein insecticides that have been used by organic farmers for five decades — can also produce similar natural proteins that kill nematodes.
Photos of rat parasitic nematode, N. brasiliensis, before and after (at right, sick, small worms) application of Bt toxin Cry21A
The discovery could pave the way for the development of an inexpensive and environmentally safe means of controlling the parasitic roundworms that each year destroy billions of dollars in crops, cause debilitating diseases in farm animals and pets, and now infect a quarter of the world’s human population. The scientists’ findings appear in the March 4 issue of the Proceedings of the National Academy of Sciences, which is making their paper available this week in its early online edition.
Major parasitic roundworm diseases in humans include ascariasis, which affects 1.5 billion people worldwide; hookworm, which infects 1.3 billion people; and elephantiasis, which affects 120 million people. Other parasitic nematodes are major agricultural pests, affecting such economically important crops as corn, soybeans, potatoes and tomatoes. They are also a problem in horses, livestock and pets.
Kim McDonald | UCSD News
New 3-D model predicts best planting practices for farmers
26.06.2017 | Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign
Fighting a destructive crop disease with mathematics
21.06.2017 | University of Cambridge
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
21.07.2017 | Event News
19.07.2017 | Event News
12.07.2017 | Event News
25.07.2017 | Physics and Astronomy
25.07.2017 | Earth Sciences
25.07.2017 | Life Sciences