Migration mechanism of atrazine in the simulated lake icing process at different freezing temperatures based on density function theory.

Atrazine causes concern due to its resistant to biodegradation and could be accumulated in aquatic organisms, causing pollution in lakes. This study measured the concentration of atrazine in ice and the water under ice through a simulated icing experiment and calculated the distribution coefficient K to characterize its migration ability in the freezing process. Furthermore, density functional theory (DFT) calculations were employed to expatiate the migration law of atrazine during icing process.

The Migration Rules of Malathion during Indoor Simulated Lake Freezing.

The effect of malathion in ice is a poorly researched area, and ice is an important habitat for organisms at the base of the food web. This study presents laboratory-controlled experiments designed to investigate the migration rule of malathion during lake freezing. Concentrations of malathion were determined in samples of melted ice and in under-ice water.

The migration law of magnesium ions during freezing and melting processes.

To explore the migration law of magnesium ions (Mg) during freezing and melting processes, laboratory simulation experiments involving freezing and melting were carried out to investigate the influence of ice thickness, freezing temperature, initial concentration, and initial pH on the distribution of Mg in the ice-water system. The distribution coefficient "K" (the ratio of the Mg concentration in the ice layer to the Mg concentration in the water layer under ice) was used to characterize the migration ability of Mg. The results showed that during the freezing process, the concentration distribution of Mg in the ice and water two-phase system was as follows: ice layer < water before freezing < water layer under ice; in other words, it migrated from ice layer to the water layer under ice.

[Impacts of electroacupucnture at Zusanli (ST 36) and Feishu (BL 13) on the postoperative inflammatory reaction and pulmonary complications in senile patients after radical resection of pulmonary carcinoma].

Objective: To observe the impacts of electroacupuncture (EA) at Zusanli (ST 36) and Feishu (BL 13) applied 30 min before the operation till the end of the operation on the postoperative inflammatory reaction and pulmonary complications in the senile patients after radical resection of pulmonary carcinoma.

Methods: Eighty senile patients of pulmonary carcinoma were selected and randomized into an observation group and a control group, 40 cases in each one. In the observation group, EA stimulation at Zusanli (ST 36) and Feishu (BL 13) was used 30 min before the operation till the end of the operation.

Effects of biofilter media depth and moisture content on removal of gases from a swine barn.

Unlabelled: Media depth (MD) and moisture content (MC) are two important factors that greatly influence biofilter performance. The purpose of this study was to investigate the combined effect of MC and MD on removing ammonia (NH), hydrogen sulfide (HS), and nitrous oxide (NO) from swine barns. Biofiltration performance of different MDs and MCs in combination based on a mixed medium of wood chips and compost was monitored.