Responses of soil enzymes, bacterial communities and soil nitrification to the pre-emergence herbicide pyroxasulfone.

Pyroxasulfone is a relatively new herbicide that is sprayed on soils to control grassy weeds and some broadleaf weeds during the cultivation of agronomic crops. However, information regarding its environmental risks to soil ecosystems is currently limited. Here, the response of soil characteristics and soil bacterial communities to pyroxasulfone exposure were evaluated.

Molecular dynamics simulation of surfactant reducing MMP between CH and n-decane.

Reinjecting produced methane offers cost-efficiency and environmental benefits for enhances oil recovery. High minimum miscibility pressure (MMP) in methane-oil systems poses a challenge. To overcome this, researchers are increasingly focusing on using surfactants to reduce MMP, thus enhancing the effectiveness of methane injections for oil recovery.

Molecular dynamics-based analysis of the factors influencing the CO replacement of methane hydrate.

The benefits of large reserves, wide distribution, and high combustion energy density of natural gas hydrates are of great practical importance to alleviate the energy tension, enhance the existing energy system in China and reduce the greenhouse effect. The CO replacement method is a critical way to develop natural gas hydrate, while traditional experimental methods are difficult to reveal the microscopic mechanism of the replacement system. An MD (molecular dynamics) technique was utilized in this work to simulate the process of carbon dioxide replacement of gas hydrates.