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Categories: Anthropology: General, Biology: Microbiology
Published Rodents sent to the International Space Station uncover possible links between gut bacteria and bone loss in microgravity
(via sciencedaily.com) Original source The bone density of astronauts -- of both the human and rodent variety -- decreases in space. Researchers report that changes to the gut microbiomes of space travelers might be associated with this bone loss. Rodents that spent a month or more on the International Space Station had altered and more diverse microbiomes, and the bacterial species that bloomed in space may have contributed to the increased production of molecules that are known to influence the bone remodeling process.
Published Why this bird flu is different: Scientists say new avian influenza requires urgent coordinated response
(via sciencedaily.com) Original source A new study tracks arrival and spread of highly pathogenic Avian Influenza (H5N1) decimating wild birds, impacting poultry and pushing up egg prices. The team found that the deadly impact on wild birds and a shift from seasonal to year-round infections signal dangerous changes in avian influenza in the U.S.
Published New mechanism for DNA folding
(via sciencedaily.com) Original source A hitherto unknown mechanism for DNA folding is described in a new study. The findings provide new insights into chromosomal processes that are vital to both normal development and to prevent disease.
Published Organic beekeeping rivals conventional methods for bee health, productivity
(via sciencedaily.com) Original source Honey bee colonies managed using organic methods were as healthy and productive as those managed in conventional systems, while avoiding the use of synthetic pesticides to control pests and pathogens inside the hive, according to entomologists.
Published Novel nanocages for delivery of small interfering RNAs
(via sciencedaily.com) Original source Small interfering RNAs (siRNAs) are novel therapeutics that can be used to treat a wide range of diseases. This has led to a growing demand for selective, efficient, and safe ways of delivering siRNA in cells. Now, in a cooperation between the Universities of Amsterdam and Leiden, researchers have developed dedicated molecular nanocages for siRNA delivery. In a paper just out in the Journal Chem they present nanocages that are easy to prepare and display tuneable siRNA delivery characteristics.
Published How does a millipede get its legs?
(via sciencedaily.com) Original source Millipede legs grow in an unexpected way, according to new research. Previously, it was thought that when a millipede molts (sheds its exoskeleton), it grows new segments on the end of its body without legs. Then after the next molt, the previously new segments re-emerge with fully formed legs attached. However, a team has found that new segments actually contain tiny bundles of legs, which appear as transparent protrusions before molting and then become fully formed afterwards. This discovery could help us understand how not only millipedes, but also other arthropods (invertebrates with jointed legs) grow.
Published Tiny biobattery with 100-year shelf life runs on bacteria
(via sciencedaily.com) Original source A tiny biobattery that could still work after 100 years has been developed.
Published Swimming secrets of prehistoric reptiles unlocked by new study
(via sciencedaily.com) Original source The diverse swimming techniques of the ancient reptiles that ruled the Mesozoic seas have been revealed.
Published Researchers uncover new differences in bacteria's sugar coat to aid pneumococcal vaccine development
(via sciencedaily.com) Original source Many disease-causing bacteria like Streptococcus pneumoniae (S. pneumoniae) are encased in a sugar layer called the capsular polysaccharide (CPS). This layer is often essential for infections. In a ground-breaking discovery, features of the CPS that help the bacteria to colonize the human respiratory tract were identified. The research showed that the structures of the CPS capsule and its types of linkages and combinations matter greatly in allowing the bacteria to better attach and survive on the lining of the upper and lower human respiratory tracts.
Published Female butterflies breed despite male shortage
(via sciencedaily.com) Original source Female monarch butterflies have no trouble finding a mate -- even when a parasite kills most of the males, new research shows.
Published New genetic target for male contraception identified
(via sciencedaily.com) Original source Discovery of a gene in multiple mammalian species could pave the way for a highly effective, reversible and non-hormonal male contraceptive for humans and animals. Researchers identified expression of the gene, Arrdc5, in the testicular tissue of mice, pigs, cattle and humans. When they knocked out the gene in mice, it created infertility only in the males, impacting their sperm count, movement and shape.
Published Molecular 'Superpower' of antibiotic-resistant bacteria
(via sciencedaily.com) Original source A species of ordinary gut bacteria that we all carry flourishes when the intestinal flora is knocked out by a course of antibiotics. Since the bacteria is naturally resistant to many antibiotics, it causes problems, particularly in healthcare settings. A study now shows how two molecular mechanisms can work together make the bacterium extra resistant.
Published Different cell types in the brain are affected by tick infection
(via sciencedaily.com) Original source The dreaded tick-borne encephalitis (TBE) virus infects different types of brain cells in different parts of the brain, depending on whether the affected person's immune system is activated or not.
Published New discovery stops bacterial virus contamination
(via sciencedaily.com) Original source A new discovery could help stop bacteria being contaminated with viruses, reducing disruption and decreasing costs in industry and research.
Published Software to untangle genetic factors linked to shared characteristics among different species
(via sciencedaily.com) Original source Scientists have developed a software package to help answer key questions about genetic factors associated with shared characteristics among different species.
Published Ancient DNA reveals the multiethnic structure of Mongolia's first nomadic empire
(via sciencedaily.com) Original source The Xiongnu, contemporaries of Rome and Egypt, built their nomadic empire on the Mongolian steppe 2,000 years ago, emerging as Imperial China's greatest rival and even inspiring the construction of China's Great Wall. In a new study, researchers find that the Xiongnu were a multiethnic empire, with high genetic diversity found across the empire and even within individual extended elite families. At the fringes of the empire, women held the highest positions of power, and the highest genetic diversity was found among low-status male servants, giving clues to the process of empire building that gave rise to Asia's first nomadic imperial power.
Published How a virus causes chromosomal breakage, leading to cancer
(via sciencedaily.com) Original source Researchers describe how the Epstein-Barr virus exploits genomic weaknesses to cause cancer while reducing the body's ability to suppress it.
Published Air pollution is not just a human problem -- it's also changing the gut of British bumblebees
(via sciencedaily.com) Original source Human activity is contributing to pollution that is affecting our health. According to WHO estimates, atmospheric air pollution is estimated to cause 4.2 million premature deaths worldwide per year. Scientists and the public alike are well aware of how human activity and pollution is affecting our heath, but new research has identified how bumblebees may be caught in the crossfire.
Published Where did the first sugars come from?
(via sciencedaily.com) Original source Origin-of-life chemists propose that glyoxylate could have been the original source of sugars on the 'prebiotic' Earth
Published Hairs that help fish feel -- and humans hear
(via sciencedaily.com) Original source Scientists are reporting a discovery about unexpected asymmetry on the hair cells of zebrafish that allow them to detect movement with greater sensitivity from the back than the front.