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251 results on '"Zhang, Xiguang"'

17. From Lawn to Health: Understanding the Prostate Cancer Risk in Light DIY Activities.

Author

Yang, Rui, Zhang, Xiguang, Chen, Chen, Li, Ya, and Yin, Jun

Subjects
GENOME-wide association studies, SINGLE nucleotide polymorphisms, PROSTATE cancer, DISEASE risk factors, ODDS ratio
Abstract

This study employs two-sample Mendelian Randomization (MR) analysis to investigate the causal relationship between light DIY activities and prostate cancer. We used single nucleotide polymorphisms (SNPs) associated with light DIY activities obtained from published genome-wide association studies (GWASs) and summary-level genetic data related to prostate cancer from published GWAS. The primary analysis was conducted using the inverse-variance weighted (IVW) method for two-sample MR analysis. Cochran's Q statistic was used to assess heterogeneity, MR-Egger was employed to detect horizontal pleiotropy, and "leave-one-out" analysis was performed for sensitivity analysis. Given the presence of heterogeneity, the random-effects IVW method was used for the primary analysis. The random-effects IVW results indicated a positive causal relationship between participation in light DIY activities and the risk of prostate cancer (odds ratio [OR] = 1.024, 95% confidence interval [CI]: 1.001–1.048; p =.039). The weighted median (WM) method results supported this finding (OR = 1.025, 95% CI: 1.003–1.048; p =.024). Participation in light DIY activities may slightly increase the risk of prostate cancer. This finding emphasizes the need to carefully consider the types and intensities of physical activities when making public health recommendations and personal lifestyle choices. [ABSTRACT FROM AUTHOR]

Published
2024
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35. THE EFFECTS OF TEMPERATURE AND SURFACTANTS ON SECONDARY DROPLETS GENERATED BY THE IMPACT OF RAINDROPS ON A WATER SURFACE

Author

Zhang, Xiguang and Zhang, Xiguang

Abstract

The effects of temperature and surfactant on secondary droplets produced by the impact of raindrops on water surface were experimentally studied in a rain facility that consists of a rain generator and a deep water pool. The rain generator is a 0.9 m × 0.6 m rectangular tank with 360 hypodermic needles mounted on its bottom. A constant water height is maintained in the tank to obtain a constant dripping rate of raindrops from the needles. The rain generator is placed 2.2 meters above the water pool that is 1.22 m long by 1.22 m wide with a water depth of 0.31 m. A circular motion of the rain generator varies the impact locations of the raindrops on the water surface.Both the raindrops and secondary droplets are measured with an in-line holographic technique that employs a collimated laser beam and a high-speed camera. The diameters and two-dimensional positions of the raindrops and secondary droplets were first reconstructed in each holographic image using a GPU-based holographic reconstruction algorithm. Then an in-house particle tracking code was implemented to compute their diameters, trajectories and instantaneous velocities. The measurement data shown in this thesis was taken at 9.5 cm above the water surface of the pool. In this study, the effects of temperature and surface tension on the production of the secondary droplets were examined separately. When studying the temperature effect, the temperature of the water in the rain generator varied from 7 degrees Celsius to 20 degrees Celsius (room temperature) while the water temperature in the pool was maintained at room temperature. When studying the surface tension effect, certain amounts of soluble surfactant (Triton X-100) was added into the water pool to vary the surface tension from 40 mN/m to 73 mN/m, while the rain water is kept clean with a surface tension of 73 mN/m. It is found that both the rain temperature and the surface tension of the water pool have an impact on the production of secondary drople

Published
2023

38. Interfacial assembly of a durable superhydrophobic polyurethane sponge with "scalelike" structures for efficient oily emulsion separation.

Author

Liu, Zhanjian, Yang, Jinyue, Jing, Jing, Zhang, Xiguang, Fu, Yuxin, Li, Meiling, Yuan, Ruixia, and Wang, Huaiyuan

Abstract

Oily wastewater discharged from the petrochemical industry and people's daily life has caused severe eco-environmental issues. Thus, developing efficient and durable oil/water separation adsorbent materials is urgently desired. In this study, a durable superhydrophobic/superlipophilic polyurethane sponge with "scalelike" pore structures was synthesized by interfacial assembly via in situ anchoring of SiO2 and H-CNTs accompanied by the bonding effect and active sites from polydopamine (PDA). After modification with 1H,1H,2H,2H-perfluorooctyltriethoxysilane (POTS), the prepared sponge demonstrated a high water contact angle (WCA) up to 156.0 ± 1.4°, which could selectively absorb diverse oils ranging from 32.0 ± 0.3 to 116.0 ± 0.3 times its own weight. Meanwhile, the prepared sponge displayed superior separation efficiency up to 99.99% toward various oily emulsions due to its superhydrophobic/superoleophilic properties accompanied by the needle demulsification and diversion of H-CNTs. Notably, the prepared sponge also exhibited prominent environment tolerance against a variety of difficult harsh circumstances such as high temperature, UV irradiation and acid/alkaline solution, and the WCAs were stably over 150 ± 1.5°. Moreover, the prepared sponge possessed excellent antifouling and self-cleaning properties. Therefore, this novel durable superhydrophobic polyurethane sponge with a "scalelike" pore structure is of great significance to enable potential applications in dealing with practically challenging emulsified wastewater. [ABSTRACT FROM AUTHOR]

Published
2023
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48. Site-specific unnatural base excision via visible light

Author

Guo, Yuan-Yang, primary, Zhang, Rujie, additional, Huo, Bianbian, additional, Wang, Luying, additional, Yuan, Donghe, additional, Bai, Jingsi, additional, Wang, Honglei, additional, Zhu, Gongming, additional, Zhang, Xiguang, additional, Zhu, Anlian, additional, Chen, Tingjian, additional, and Li, Lingjun, additional

Published
2022
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