Bee

joined 1 week ago
 
  • Researchers found that infectious bacteria in diabetic mice rapidly evolved resistance to antibiotics.
  • Controlling blood sugar in the mice via insulin significantly reduced the emergence of drug-resistant bacteria.
 
  • Scientists found that, when deprived of amino acids, cancer cells cooperated to extract and share them from their environment.
  • Blocking a protein called CNDP2 shut down this cooperative survival strategy, suggesting a new potential target for cancer treatment.
9
Tentacles and tumors. (elifesciences.org)
 

Experiments in tiny freshwater animals suggest that certain tumors manipulate their host’s body to increase the likelihood of being transmitted to the next generation.

 

A planet may have been destroyed by a white dwarf at the center of a planetary nebula — the first time this has been seen. As described in our latest press release, this would explain a mysterious X-ray signal that astronomers have detected from the Helix Nebula for over 40 years. The Helix is a planetary nebula, a late-stage star like our Sun that has shed its outer layers leaving a small dim star at its center called a white dwarf.

 

Using social robots is a promising approach for supporting senior citizens in the context of super-aging societies. The essential design factors for achieving socially acceptable robots include effective emotional expressions and cuteness. Past studies have reported the effectiveness of robot-initiated touching behaviors toward interacting partners on these two factors in the context of interaction with adults, although the effects of such touch behaviors on them are unknown in seniors. Therefore, in this study, we investigated the effects of robot-initiated touch behaviors on perceived emotions (valence and arousal) and the feeling of kawaii, a common Japanese adjective for expressing cute, lovely, or adorable. In experiments with Japanese participants (adults: 21–49, seniors: 65–79) using a baby-type robot, our results showed that the robot’s touch significantly increased the perceived valence regardless of the expressed emotions and the ages of the participants. Our results also showed that the robot’s touch was effective in adults in the context of arousal and the feeling of kawaii, but not in seniors. We discussed the differential effects of robot-initiated touch between adults and seniors by focusing on emotional processing in the latter. The findings of this study have implications for designing social robots that have the capability of physical interaction with seniors.

 

First image captured by Firefly’s Blue Ghost lunar lander, taken shortly after confirmation of a successful landing at Mare Crisium on the Moon’s near side. This is the second lunar delivery of NASA science and tech instruments as part of the agency’s Commercial Lunar Payload Services initiative.

Carrying a suite of NASA science and technology, Firefly Aerospace’s Blue Ghost Mission 1 successfully landed at 3:34 a.m. EST on Sunday near a volcanic feature called Mons Latreille within Mare Crisium, a more than 300-mile-wide basin located in the northeast quadrant of the Moon’s near side.

 

Superconducting magnets inside a fusion reactor will experience conditions that aren’t seen anywhere on Earth. Materials scientists Susie Speller and Chris Grovenor are trying to predict how long these components can last in this extreme environment

 

Tomato yellow leaf curl virus (TYLCV), a devastating pathogen of tomato crops, is vectored by the whitefly Bemisia tabaci, yet the mechanisms underlying TYLVC epidemics are poorly understood. We found that TYLCV triggers the up-regulation of two β-myrcene biosynthesis genes in tomato, leading to the attraction of nonviruliferous B. tabaci. We also identified BtMEDOR6 as a key whitefly olfactory receptor of β-myrcene involved in the distinct preference of B. tabaci MED for TYLCV-infected plants. TYLCV inhibits the expression of BtMEDOR6, canceling this preference and thereby facilitating TYLCV transmission to uninfected plants. Greenhouse experiments corroborated the role of β-myrcene in whitefly attraction. These findings reveal a sophisticated viral strategy whereby TYLCV modulates both host plant attractiveness and vector olfactory perception to enhance its spread.

view more: next ›