Tag Archives: Bacteria

Top New Science Podcasts: Bacteria Building Bricks, Solar Cells That Turn ‘Waste Heat’ To Electricity

Science Magazine PodcastsOn this week’s show, Staff Writer Robert F. Service talks with host Sarah Crespi about manipulating microbes to make them produce building materials like bricks—and walls that can take toxins out of the air. 

Sarah also talks with Paul Davids, principal member of the technical staff in applied photonics & microsystems at Sandia National Laboratories, about an innovation in converting waste heat to electricity that uses similar materials to solar cells but depends on quantum tunneling. And in a bonus segment, producer Meagan Cantwell talks with Online News Editor David Grimm on stage at the AAAS annual meeting in Seattle.

They discuss how wildfires can harm your lungs, crime rates in so-called sanctuary states, and how factors such as your gender and country of origin influence how much trust you put in science.

Study: “Probiotic Drink” Developed That Thwarts Antibiotic Resistance

From a Genetic Engineering & Biotechnology News online article:

Genetic Engineering & Biotechnology News logo“We were able to show that if you can stop the plasmid from replicating, then most of the bacteria lose the plasmid as the bacteria grow and divide. This means that infections that might otherwise be hard to control, even with the most powerful antibiotics available, are more likely to be treatable with standard antibiotics.”

journal.pone.0225202.g001
Fig 1. Anticipated exploitation of pCURE as a probiotic treatment for at-risk individuals. Before treatment, plasmids carrying antibiotic resistance genes are shown as purple circles. After treatment, target plasmids are replaced by pCURE (green circle) which could be engineered to later “self-destruct”. Note that not all gut bacteria carry resistance plasmids but pCURE can enter all Enterobacteriaceae as well as other bacteria. Reduced resistance levels in the gut decrease the chance of treatment failure when infections elsewhere in the body (eg lungs or urinary tract) arise from gut bacteria.

 

Researchers headed by a team at the University of Birmingham in the U.K. have developed a probiotic drink containing genetic elements that are designed to thwart antimicrobial resistance (AMR) in gut bacteria at the genetic level. The drink targets small DNA elements called plasmids that carry antibiotic resistance genes, and which are able to replicate independently and spread between bacteria. By preventing these plasmids from replicating, the antibiotic resistance genes are displaced, effectively resensitizing the bacteria to antibiotics.

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Top New Science Podcasts: 3D Printer Advances, Gut Microbes Linked To Liver Disease (Nature Magazine)

Nature PodcastHear this week’s science news, with Nick Howe and Shamini Bundell. This week, a new 3D printer allows quick shifting between many materials, and understanding the link between gut microbes and liver disease.

In this episode:

00:46 A new dimension for 3D printers

A new nozzle lets a 3D printer switch between materials at a rapid rate, opening the door to a range of applications. Research Article: Skylar-Scott et al.News and Views: How to print multi-material devices in one go

08:07 Research Highlights

The slippery secrets of ice, and cells wrapping up their nuclei. Research Highlight: Viscous water holds the secret to an ice skater’s smooth glideResearch Highlight: Super-thin layer of ‘bubble wrap’ cushions a cell’s nucleus

10:17 Linking bacteria to liver disease

Researchers have isolated a bacterial strain that appears to play an important role in alcoholic liver disease. Research paper: Duan et al.News and Views: Microbial clues to a liver disease

17:10 News Chat

‘Megaconstellations’ of satellites concern astronomers, and a report on the gender gap in chemistry. News: SpaceX launch highlights threat to astronomy from ‘megaconstellations’News: Huge study documents gender gap in chemistry publishing