Showing 20 articles starting at article 1161

< Previous 20 articles        Next 20 articles >

Categories: Biology: Cell Biology, Paleontology: Climate

Return to the site home page

     (via sciencedaily.com)     Original source 

Past cold periods such as the Little Ice Age were associated with reduced strength of North Atlantic currents and increased surface salinity in the Caribbean. This was accompanied by disturbances in the distribution of salt to the north leading to longer, stronger cooling phases in the northern hemisphere.

     (via sciencedaily.com)     Original source 

Research in mice shows that the anti-inflammatory properties of exercise may arise from immune cells mobilized to counter exercise-induced inflammation. Immune cells prevent muscle damage by lowering levels of interferon, a key driver of chronic inflammation, inflammatory diseases, and aging.

     (via sciencedaily.com)     Original source 

There are many creatures on our planet with more advanced senses than humans. Turtles can sense Earth's magnetic field. Mantis shrimp can detect polarized light. Elephants can hear much lower frequencies than humans can. Butterflies can perceive a broader range of colors, including ultraviolet (UV) light.

     (via sciencedaily.com)     Original source 

The penetration of viruses into cells can now be tracked with unprecedented accuracy thanks to an innovative design for pseudoviruses.

     (via sciencedaily.com)     Original source 

By comparing genomes of several cat species, the project has helped researchers understand why cat genomes tend to have fewer complex genetic variations (such as rearrangements of DNA segments) than other mammal groups, like primates. It also revealed new insights into which parts of cat DNA are most likely to evolve rapidly and how they play a role in species differentiation.

     (via sciencedaily.com)     Original source 

Using a technique that has shown promise in targeting cancer tumors, a team has found a way to deploy a molecular warhead that can annihilate the bacterium that causes Lyme disease.

     (via sciencedaily.com)     Original source 

Scientists have published the first successful application of 2-photon intravital microscopy (IVM) to image the dynamics of fungal infections in the kidney of a living host. The study reveals that the opportunistic human fungal pathogen Candida albicans requires the ability to metabolize proline, an amino acid obtained from the host, to mount virulent infections.

     (via sciencedaily.com)     Original source 

Researchers have shown that sex differences in animals vary dramatically across species, organs and developmental stages, and evolve quickly at the gene level but slowly at the cell type level.

     (via sciencedaily.com)     Original source 

Researchers have identified a gene which is an early determining factor of ovary development in mice.

     (via sciencedaily.com)     Original source 

An international team of researchers has discovered that formaldehyde, a widely spread pollutant and common metabolite in our body, interferes in the epigenetic programming of the cell. This finding expands the knowledge of formaldehyde, previously considered only as a DNA mutagen, and helps establishing a further link with cancer.

     (via sciencedaily.com)     Original source 

Researchers found that the hormone oxytocin, known to be involved in regulating feeding and social behavior and until now to be produced mostly in the brain, is also produced in the human intestine. Furthermore, gut resident bacteria L. reuteri can affect the production of gut-made oxytocin, providing the first insights into a mechanism by which these bacteria can influence human health.

     (via sciencedaily.com)     Original source 

'Satellite' viruses must be in proximity to their 'helper' virus to replicate, but this research reports the first documented case of a satellite virus attaching itself to its helper virus. Out of 50 observed helpers, 40 had a satellite bound. Bioinformatic analysis of the satellite and helper viruses' genomes provides clues as to why the satellite may have evolved to attach to the helper, and suggests this pair may have been co-evolving for about 100 million years.

     (via sciencedaily.com)     Original source 

In the immune system's fight against cancer and infections, the T cells often lose their power. Now immunologists may have found a possible explanation for this phenomenon.

     (via sciencedaily.com)     Original source 

Broadly neutralizing antibodies are already being used to fight viruses. This approach could also help to treat infections with multi-resistant bacteria in the future.

     (via sciencedaily.com)     Original source 

During the last ice age, the last glacial maximum about 20,000 years ago, the climate in the North Atlantic underwent much greater multi-centennial variability than it does in the present warm period. This is supported by evidence found in ice and seafloor cores. Researchers have now shown, based on a climate model, that internal mechanisms such as temperature and salinity distribution in the ocean are driving this multi-centennial variability.

     (via sciencedaily.com)     Original source 

Our understanding of how cells recycle lipids through autophagy -- a form of cellular degradation -- has grown significantly, thanks to a recent study. Using yeast as a model organism, the researchers explored the molecular mechanisms leading to the degradation of the phospholipid bilayers making up the cell membranes. Their findings improve our understanding of cellular degradation processes and related metabolic disorders.

     (via sciencedaily.com)     Original source 

Though beer is a popular drink worldwide, it's usually made from barley, which leaves those with a gluten allergy or intolerance unable to enjoy the frothy beverage. Sorghum, a naturally gluten-free grain, could be an alternative, but complex preparation steps have hampered its widespread adoption by brewers. Now, researchers reporting the molecular basis behind sorghum brewing have uncovered an enzyme that could improve the future of sorghum-based beers.

     (via sciencedaily.com)     Original source 

A new study unveils a novel methodology to engineer colloidal quasicrystals using DNA-modified building blocks. The implications of this breakthrough are far-reaching, offering a potential blueprint for the controlled synthesis of other complex structures previously considered beyond reach.

     (via sciencedaily.com)     Original source 

A new study takes an important step toward reconstructing a global history of water over the past 2,000 years. Using geologic and biologic evidence preserved in natural archives -- including 759 different paleoclimate records from globally distributed corals, trees, ice, cave formations and sediments -- the researchers showed that the global water cycle has changed during periods of higher and lower temperatures in the recent past.

     (via sciencedaily.com)     Original source 

New research found that daily strawberry consumption could help reduce the risk of dementia for certain middle-aged populations.