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Ecological Restoration of Engineering Slopes in China—A Review

Shen, Yifan ; Li, Qi ; Pei, Xiangjun ; [et al.]

MDPI AG ; 2023

In: Sustainability Vol. 15, No. 6 ( 2023-03-17), p. 5354-

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In: Sustainability, MDPI AG, Vol. 15, No. 6 ( 2023-03-17), p. 5354-

Abstract: As the protection of the environment gains more public attention in China, a large number of engineering slopes, which are not conducive to the growth of vegetation and are prone to natural disasters caused by constructions, are in urgent need of restoration. Herein, we explain the theoretical basis for the ecological restoration of engineering slopes and introduce the technologies commonly used in this regard, including soil improvement, bioremediation, and ecological slope protection. The benefits and evaluation of the impact of ecological restoration of engineering slopes are also detailed. Finally, we discuss the current problems in ecological restoration and put forward some future research prospects. By summarizing the existing techniques and evaluation systems for ecological restoration, this study provides a reference for its implementation and evaluation, contributing to the long-term, stable, and rapid development of ecological restoration of engineering slopes.

Type of Medium: Online Resource

ISSN: 2071-1050

URL: Article

DOI: 10.3390/su15065354

Language: English

Publisher: MDPI AG

Publication Date: 2023

detail.hit.zdb_id: 2518383-7

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Association between Vitamin D Supplementation and Cancer Mortality: A Systematic Review and Meta-Analysis

Zhang, Renjie ; Zhang, Yu ; Liu, Zheran ; [et al.]

MDPI AG ; 2022

In: Cancers Vol. 14, No. 15 ( 2022-07-30), p. 3717-

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In: Cancers, MDPI AG, Vol. 14, No. 15 ( 2022-07-30), p. 3717-

Abstract: Background: Vitamin D deficiency is related to increased cancer risk and deaths. However, whether vitamin D supplementation reduces cancer mortality remains unclear, and several randomized controlled trials yield inconsistent results. Methods: Medline, Embase, and the Cochrane Central Register of Controlled Trials were searched from their inception until 28 June 2022, for randomized controlled trials investigating vitamin D supplementation. Pooled relative risks (RRs) and their 95% confidence intervals (CIs) were estimated. Trials with vitamin D supplementation combined with calcium supplementation versus placebo alone and recruiting participants with cancer at baseline were excluded in the present study. Results: This study included 12 trials with a total of 72,669 participants. Vitamin D supplementation did not reduce overall cancer mortality (RR 0.96, 95% CI 0.80–1.16). However, vitamin D supplementation was associated with a reduction in lung cancer mortality (RR 0.63, 95% CI 0.45–0.90). Conclusions: Vitamin D supplementation could not reduce cancer mortality in this highly purified meta-analysis. Further RCTs that evaluate the association between vitamin D supplementation and total cancer mortality are still needed.

Type of Medium: Online Resource

ISSN: 2072-6694