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Categories: Biology: Biochemistry, Environmental: General

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Environmental epidemiologists report on a new study of air pollution exposures collected using personal wristband monitors worn by pregnant individuals in New York City matched with data from a questionnaire. Factors predictive of exposures to air pollution include income, time spent outdoors, maternal age, country of birth, transportation type, and season.

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Urban agriculture has the potential to decentralize food supplies, provide environmental benefits like wildlife habitat, and mitigate environmental footprints, but researchers have identified knowledge gaps regarding both the benefits and risks of urban agriculture and the social processes of growing more food in urban areas.

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Phosphorus is essential for undisturbed plant growth and development. However, in many soils, phosphorus is only poorly available. One mechanism used by plants to increase phosphorus availability is the release of malate, an organic acid, which can form complexes with iron or aluminium in the soil, thereby liberating sorbed phosphate. However, this response can also result in iron overaccumulation, which can inhibit root growth.

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The widely used dry-cleaning and degreasing solvent perc can be converted to useful chemicals by a new clean, safe and inexpensive procedure. The discovery using on-demand UV activation may open the path to upcycling perc and thus contribute to a more sustainable society.

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Picrodontids -- an extinct family of placental mammals that lived several million years after the extinction of the dinosaurs -- are not primates as previously believed.

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A new study shows that human hunting and land use have a decisive influence on red deer density in Europe. Red deer density is only reduced when wolves, lynx and bears co-occur at the same site.

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The ocean plays a crucial role in the storage of carbon dioxide (CO2). The so-called marine biological carbon pump is an important research topic in this context. However a key component is often overlooked. Colleagues outline why it is insufficient to focus solely on biological processes when investigating the accumulation of CO2 in the ocean by the biological carbon pump.

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Scientists have investigated lamprey embryos using cutting-edge microscopic techniques to reveal interesting insights about vertebrate head evolution, clarifying an unresolved mystery in basic science.

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Free charge carriers in perovskite solar cells likely have a special form of protection from recombination, researchers have discovered. This may be key to the high efficiency of this cell type, which has been increased to over 25 % within a decade.

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The frigid Arctic Ocean is far removed from the places most people live, but even so, 'forever chemicals' reach this remote landscape. Now, research suggests that per- and polyfluoroalkyl substances (PFAS) won't stay there indefinitely. Instead, they are transported in a feedback loop, with the Arctic Ocean potentially exporting as many PFAS to the North Atlantic Ocean as it receives, circulating the compounds around the world.

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An international group of researchers finds that conserving about half of global land area could maintain nearly all of nature's contributions to people and still meet biodiversity targets for tens of thousands of species. But the same priority areas are at risk of conflict with human development with only 18% of that land area protected.

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Peatlands are affected more by drought than expected. This is concerning, as these ecosystems are an important ally in the fight against climate change. Following long periods of drought, peat is able to absorb little to no extra carbon (CO2). Increasing biodiversity also does little to make peat more drought-resilient.

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Combining a biological heart and a silicone robotic pump, researchers created a biorobotic heart that beats like a real one, with a focus on a valve on the left side of the heart. The heart valve simulator can mimic the structure, function, and motion of a healthy or diseased heart, allowing surgeons and researchers to demonstrate various interventions while collecting real-time data.

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A new study confirms that spring snowpacks across the Northern Hemisphere have shrunk significantly over the past 40 years due to human-driven climate change, putting hundreds of millions of people worldwide at risk of a water crisis. The Southwestern and Northeastern U.S. saw among the steepest declines, with more than 10% of the spring snowpack lost per decade, which the researchers expect will accelerate with further warming. Many heavily populated snow-dependent watersheds are dangerously near what they call a 'snow-loss cliff,' wherein once average winter temperatures exceed 17 degrees Fahrenheit, snow loss accelerates even with only modest increases in temperature.

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Researchers have found almost identical patterns of tree diversity across the world's tropical forests. The study of over one million trees across 1,568 locations found that just 2.2% of tree species make up 50% of the total number of trees in tropical forests across Africa, the Amazon, and Southeast Asia. Each continent consists of the same proportion of a few common species and many rare species.

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Without drastically reducing global emissions, the Antarctic Ocean could become too acidic for hundreds of species living there, many already endangered by rising temperatures and sea ice loss.

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The genomic analysis of 52 Psilocybe specimens includes 39 species that have never been sequenced. Psilocybe arose much earlier than previously thought -- about 65 million years ago -- and the authors found that psilocybin was first synthesized in mushrooms in the genus Psilocybe. Their analysis revealed two distinct gene orders within the gene cluster that produces psilocybin. The two gene patterns correspond to an ancient split in the genus, suggesting two independent acquisitions of psilocybin in its evolutionary history. The study is the first to reveal such a strong evolutionary pattern within the gene sequences underpinning the psychoactive proteins synthesis.

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New research delves into the intricate defense mechanisms of tomatoes against the notorious bacterial pathogen, Pseudomonas syringae pv. tomato (Pst). It's a classic tale of nature's arms race: as pathogens evolve to outsmart plant defenses, plants counter with more sophisticated immune responses.

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People who own electric vehicles (EVs) are more likely to go a step further and add solar panels to their home, according to an analysis of a behavioral study. Conversely, the impact of owning solar panels also has a bearing on whether a homeowner buys an electric vehicle but not as strongly.

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With DNA recovered from animal tracks, scientists revealed information about the ancestry and microbial community of bobcats without having to sample the animal directly.