Correction: Effect of support on hydrogen generation over iron oxides in the chemical looping process.

[This corrects the article DOI: 10.1039/D1RA07210B.].

Effect of support on hydrogen generation over iron oxides in the chemical looping process.

FeO is recognized as an excellent oxygen carrier for its low cost and high oxygen capacity. However, pure FeO must be deposited on supports to ensure high reactivity and durability. Here, we proposed several FeO-based oxygen carriers using MgAlO, CeGdO, and ZrYO as supports and investigated their performance for chemical looping hydrogen generation.

[Spatial Distribution Study and Pollution Assessment of Pb in Soils in the Xijiang River Drainage of Guangxi].

To obtain data for the accumulation of Pb and its risk in soils in the Xijiang River drainage of Guangxi, 2594 samples were collected from nonferrous metal mining soils, farmland soils (paddy soils and dryland soils), and the background soils in the drainage area. Geostatistical analysis combined with GIS was used to study the soil spatial distribution characteristics and pollution distribution of the soil Pb content. The results showed that the Pb background value of the soil was 51.

[Dietary exposure assessment of antimony to inhabitants around mine contaminated areas in Nandan County in 2013-2014].

Objective: To investigate the contents of antimony in Nandan food, and to research the effects of dietary pathways that mining surrounding usual's heavy metal intake due to mining activities.

Methods: Based on the data from weighing method and chemical analysis method, the dietary exposure level of antimony in Nandan was calculated, and the safety of antimony intake was evaluated by the TDI established by WHO.

Results: A total of 864 samples from 14 food categories were analyzed.

[Characteristics of Heavy Metal Contents in Human Hairs of Mine Contaminated Areas in Nandan County].

Nandan county is usually called "land of nonferrous metals". In order to discuss the impact of mining activities on the health of inhabitants in Nandan county, 200 human hair samples were collected from 4 villages (Liuzhai is a uncontaminated contrast areas, Chehe, Dachang and Zhanglao are contaminated areas) of Nandan and analyzed for contents of As, Sb, Cd, Pb, Cu and Zn. The results showed that the average contents of As, Sb, Cd and Pb were 1.

Chiral resolution, determination of absolute configuration, and biological evaluation of (1,2-benzothiazin-4-yl)acetic acid enantiomers as aldose reductase inhibitors.

A novel series of (1,2-benzothiazin-4-yl)acetic acid enantiomers was prepared by chiral resolution, and their absolute configurations were determined using the PGME method. The biological evaluation of the racemate and single enantiomers has shown a remarkable difference for the aldose reductase inhibitory activity and selectivity. The (R)-(-)-enantiomer exhibited the strongest aldose reductase activity with an IC(50) value of 0.

Copper-catalyzed asymmetric synthesis and comparative aldose reductase inhibition activity of (+)/(-)-1,2-benzothiazine-1,1-dioxide acetic acid derivatives.

A copper catalyst system for the asymmetric 1,4-hydrosilylation of the α,β-unsaturated carboxylate class was developed by which synthesis of (+)- and (-)-enantiomers of 1,2-benzothiazine-1,1-dioxide acetates has been achieved with a good yield and an excellent level of enantioselectivity. A comparative structure-activity relationship study yielded the following order of aldose reductase inhibition activity: (-)-enantiomers > racemic > (+)-enantiomers. Further, a molecular docking study suggested that the (-)-enantiomer had significant binding affinity and thus increased inhibition activity.