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Science News Archive August 2017 - Page 20


Page 20 of 41

Bacteria stab amoebae with micro-daggers

Researchers at ETH Zurich have discovered a mechanism used by bacteria Amoebophilus to shoot micro-daggers that pierce the digestive compartment of an amoeba, allowing it to escape digestion and thrive. The study reveals new insights into bacterial evolution and opens up possibilities for other structural biology investigations.

SourceETH Zurich·JournalScience·DateAug 17, 2017

Managing western flower thrips

A study evaluated the effectiveness of chemical insecticides and the entomopathogenic fungus Beauveria bassiana against western flower thrips on broccoli and lettuce. The results suggest that incorporating biopesticides like Beauveria bassiana into Integrated Pest Management (IPM) practices can help manage thrip populations effectively.

SourceBentham Science Publishers·JournalThe Open Plant Science Journal·DateAug 17, 2017

Digging in the dirt

University of Delaware researchers have developed new methods to evaluate the risk of subsurface phosphorus losses in US croplands, particularly in flat and artificially drained areas. The study uses soil data to improve existing phosphorus index models and provides a more accurate assessment of subsurface phosphorus risks.

SourceUniversity of Delaware·JournalJournal of Environmental Quality·DateAug 17, 2017

No direct flights for memory retrieval

Research finds that a neural stopover in the subiculum is necessary for retrieving episodic memories, but not forming them. Activating or inhibiting this pathway affects memory recall and stress hormone levels related to fear responses.

SourceRIKEN·JournalCell·DateAug 17, 2017

Reed warblers have a sense for magnetic declination

Migratory Eurasian reed warblers rely on changes in magnetic declination to guide them along the east-west axis, solving a challenging navigational problem. The birds learn to recognize large-scale spatial patterns of declination gradients during their annual movements.

SourceCell Press·JournalCurrent Biology·DateAug 17, 2017

Gender norms are still important for women's choice of college major

A study suggests that women's conformity to traditional feminine norms affects their choice of college majors. Women conforming more closely to these norms are less likely to pursue STEM fields or arts/humanities, while those who align with caregiving and domesticity norms are more likely to choose STEM or clinical fields.

SourceSpringer·JournalGender Issues·DateAug 17, 2017

Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Researchers at the University of Illinois have developed a new method to manufacture graphene using carbon dioxide, eliminating the need for harsh chemicals and producing a more environmentally friendly process. This breakthrough has significant implications for the production of graphene, a key material in sensors and flexible devices.

SourceUniversity of Illinois Grainger College of Engineering·JournalJournal of Materials Chemistry C·DateAug 16, 2017

Whales turn tail at ocean mining noise

A new study found that humpback whales avoid loud ocean mining noise triggered by seismic air gun surveys, suggesting a clear avoidance reaction within a certain distance from the vessel. The research aims to improve current mitigation measures to prevent adverse effects of seismic air gun noise on large whale behavior.

SourceUniversity of Queensland·JournalJournal of Experimental Biology·DateAug 16, 2017

Blood marker may predict postmenopausal women's risk of bone fractures

Researchers discovered a blood marker that can predict the risk of bone fractures in postmenopausal women, independent of other measures. High levels of periostin protein fragments were found to be associated with an increased risk of fractures, suggesting they reflect additional bone properties.

SourceWiley·JournalJournal of Bone and Mineral Research·DateAug 16, 2017

Gold shines through properties of nano biosensors

Researchers have discovered that fluorescence in ligand-protected gold nanoclusters is an intrinsic property of the gold particles. The study used Au20 nanoparticles with a tetrahedral structure and found intense fluorescence at a wavelength of 739.2 nanometers, indicating that the metal core is responsible for the phenomenon.

SourceAmerican Institute of Physics·JournalThe Journal of Chemical Physics·DateAug 16, 2017