Freezing-driven reduction of chromium(Ⅵ) in ice under solar light without external reductants.

This study systematically investigated the direct photoreduction of Cr(Ⅵ) in ice under simulated sunlight without external reductants. It was shown that the Cr(Ⅵ) photoreduction was observed only in ice at near-neutral pH values but not in aqueous solutions. Cr(Ⅵ) at an initial concentration of 10 μM was efficiently reduced by 75.

Mental Health Study from the Perspective of Behavior Preference under the Environment of Internet Media: Based on China's Data Analysis.

To prevent the mental health problems of college preference students effectively, this paper analyzes the influence of college students' internet media use behaviors on their mental health in the information age. We make an empirical study on the above problems by using metrology models under the condition of controlling individual factors. The result shows that the mental health of college students is significantly affected by different internet media use behaviors and shows obvious heterogeneity.

Effects of oxalic acid on Cr(VI) reduction by phenols in ice.

Since Cr(VI) is highly toxic, the environmental reduction of Cr(VI) to Cr(III) has attracted significant attention. Oxalic acid, a primary component of dissolved organic matter (DOM), is widely distributed throughout the natural environment but the reduction of Cr(VI) by oxalic acid is insignificant at the low concentrations present in the environment; however, the reduction of Cr(VI) is accelerated significantly in ice. In terms of combined pollution, Cr(VI) can coexist with other organic pollutants in the environment but the impact of organic pollutants on the reduction of Cr(VI), changes to the organic pollutants themselves, and the role of oxalic acid in these reactions are unknown.

Photoconversion of 2-Chloronaphthalene in Water.

The photoconversion of 2-chloronaphthalene (CN-2) in water in a simulated sunlight system was investigated. The photoconversion efficiency, photoproducts and mechanisms were inspected, and the effects of inorganic ions (NO, NO) and fulvic acid (FA) were discussed. The results showed that CN-2 could be transformed in water under the irradiation.

[Anti-microRNA-221 enhances radiosensitivity of colorectal carcinoma cells by up-regulating PTEN].

Objective: To investigate the effect of knocking-down microRNA-221 (miR-221) expression on the radiosensitivity of human colorectal carcinoma cells.

Methods: Human colorectal carcinoma-derived cell line Caco2 was transfected with miR-221 antisense oligonucleotides (anti-miR-221) via Lipofectamine 2000. Real-time quantitative PCR was performed to detect the expression of miR-221 and PTEN mRNA in Caco2 cells.