Most lab studies on microplastics rely on high doses and simplified conditions, raising questions about how accurately they reflect real-world human exposure and health risks. Study: Gaps between ...

To determine the pyrolysis mechanism of propane, it is necessary to study the initial reactions of propane pyrolysis. The bond dissociation energy is an important reference for judging the ease of ...

Rapid and reliable discrimination of ammunition propellants from consumer fireworks powders is critical in forensic explosives analysis but remains challenging due to overlapping chemical signatures ...

The 2,4-dichlorophenoxyacetic (2,4-D) and 4-chloro-2-methylphenoxyacetic acids (MCPA) were the first auxinic herbicides used in agriculture. In 1942, Zimmerman and Hitchcock showed that certain ...

While much of the history of life on Earth is written, the opening chapters are murky at best. On our ever-changing world, the older a rock is, the more it has changed, obscuring or even erasing ...

Fossilized remnants of ancient carbon from the heart of South Africa's Mpumalanga province have just yielded the earliest chemical evidence yet of life on Earth. According to a new analysis using ...

Teasing out biochemical information from ancient organic-rich sediments, notably the timing of the emergence of photosynthesis relative to the inferred oxygenation of Earth’s atmosphere, remains a ...

aAssisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310016, China bDepartment of Gynecology, Center for ...

MSU researcher Katie Maloney contributed samples of rare, exceptionally well-preserved seaweed fossils (e.g., macroscopic algae) from Yukon Territory, Canada. These fossils are almost one-billion ...

MSU researcher Katie Maloney contributed samples of rare, exceptionally well-preserved seaweed fossils (e.g., macroscopic algae) from Yukon Territory, Canada. These fossils are almost one billion ...

A new study uncovered fresh chemical evidence of life in rocks more than 3.3 billion years old, along with molecular traces showing that oxygen-producing photosynthesis emerged nearly a billion years ...