Search

Your search keyword '"Ren, Fazheng"' showing total 1,045 results
Start Over Author "Ren, Fazheng"
1,045 results on '"Ren, Fazheng"'

101. Effect of alkyl‐chain unsaturation on the antioxidant potential of chlorogenic acid derivatives in food and biological systems.

Author

Wang, Yuzhuo, Xu, Yan, Luo, Hailing, Yang, Dong, Ren, Fazheng, and Zhang, Hao

Subjects
CHLOROGENIC acid, ACID derivatives, BIOLOGICAL systems, FREE radical reactions, ACYL chlorides, FISH oils
Abstract

Summary: Chlorogenic acid (CGA) was modified using acyl chlorides with different levels of unsaturation (C18:0–C18:3) to enhance the lipophilicity and promote its application. The antioxidant activity of CGA derivatives in food and biological models was evaluated. All CGA derivatives had significantly greater antioxidative activity than CGA in fish oil and β‐carotene/linoleic acid emulsions (P < 0.05), but there was no linear relationship between antioxidative activity and unsaturation. The effectiveness of CGA‐C18:0 was significantly greater than that of CGA in scavenging H2O2 and reducing copper‐induced human low‐density lipoprotein (LDL) oxidation (P < 0.05). Furthermore, the H2O2 scavenging activity, inhibitions of copper‐induced human LDL oxidation and hydroxyl or peroxyl radical‐induced DNA oxidation were all linearly related to the unsaturation of the alkyl chains, mainly with the free radical chain reactions of the unsaturated bonds. Our findings showed that CGA derivatives could potentially be used as antioxidants in food and biological systems. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

105. Redox-Click Chemistry for Disulfide Formation from Thiols

Author

Li, Hengzhao, primary, Peng, Mengqi, additional, Li, Junyu, additional, Do, Hainam, additional, Ni, Ke, additional, Wang, Minlong, additional, Yuan, Zhankui, additional, Wang, Lijun, additional, Zhao, Tianxiao, additional, Zhang, Xiaohe, additional, Li, Yixuan, additional, Wang, Ran, additional, Wang, Pengjie, additional, Zhang, Xiaoxu, additional, Gao, Ting, additional, Yu, Shoujuan, additional, Qiao, Kangjia, additional, Li, Dongjie, additional, Ren, Fazheng, additional, and An, Jie, additional

Published
2023
Full Text
View/download PDF

109. Prolonged efficacy of Bifidobacterium lactis in the treatment of functional dyspepsia

Author

Zhang, Qi, primary, Li, Guang, additional, Zhao, Wen, additional, Zhou, Limian, additional, Zhang, Xiaoxu, additional, He, Jingjing, additional, An, Peng, additional, Liu, Yinghua, additional, Zhang, Chengying, additional, Zhang, Yong, additional, Liu, Simin, additional, Liu, Wei-Hsien, additional, Liu, Fudong, additional, Li, Yixuan, additional, Jiang, WenJian, additional, Wang, Xifan, additional, Wang, Xiaoyu, additional, Wang, Qingyu, additional, Fang, Bing, additional, Guo, Meng, additional, Zhao, Yuyang, additional, Ren, Yimei, additional, Niu, Xiaokang, additional, Li, Dongjie, additional, Zhang, Chao, additional, Shi, Shaoqi, additional, Wang, Ran, additional, Liu, Xinjuan, additional, Hung, Wei-Lian, additional, and Ren, Fazheng, additional

Published
2023
Full Text
View/download PDF

112. Dynamic Transformation of Nano-MoS2in a Soil–Plant System Empowers Its Multifunctionality on Soybean Growth

Author

Li, Mingshu, Zhang, Peng, Guo, Zhiling, Zhao, Weichen, Li, Yuanbo, Yi, Tianjing, Cao, Weidong, Gao, Li, Tian, Chang Fu, Chen, Qing, Ren, Fazheng, Rui, Yukui, White, Jason C., and Lynch, Iseult

Abstract

Molybdenum disulfide (nano-MoS2) nanomaterials have shown great potential for biomedical and catalytic applications due to their unique enzyme-mimicking properties. However, their potential agricultural applications have been largely unexplored. A key factor prior to the application of nano-MoS2in agriculture is understanding its behavior in a complex soil–plant system, particularly in terms of its transformation. Here, we investigate the distribution and transformation of two types of nano-MoS2(MoS2nanoparticles and MoS2nanosheets) in a soil–soybean system through a combination of synchrotron radiation-based X-ray absorption near-edge spectroscopy (XANES) and single-particle inductively coupled plasma mass spectrometry (SP-ICP-MS). We found that MoS2nanoparticles (NPs) transform dynamically in soil and plant tissues, releasing molybdenum (Mo) and sulfur (S) that can be incorporated gradually into the key enzymes involved in nitrogen metabolism and the antioxidant system, while the rest remain intact and act as nanozymes. Notably, there is 247.9 mg/kg of organic Mo in the nodule, while there is only 49.9 mg/kg of MoS2NPs. This study demonstrates that it is the transformation that leads to the multifunctionality of MoS2, which can improve the biological nitrogen fixation (BNF) and growth. Therefore, MoS2NPs enable a 30% increase in yield compared to the traditional molybdenum fertilizer (Na2MoO4). Excessive transformation of MoS2nanosheets (NS) leads to the overaccumulation of Mo and sulfate in the plant, which damages the nodule function and yield. The study highlights the importance of understanding the transformation of nanomaterials for agricultural applications in future studies.

Published
2024
Full Text
View/download PDF

118. Effect of oral administration of Lactobacillus paracasei L9 on mouse systemic immunity and the immune response in the intestine

Author

Zhu Yuanbo, Zhu Jun, Zhao Liang, Zhang Ming, Guo Huiyuan, and Ren Fazheng

Subjects
Lactobacillus paracasei L9, immunomodulatory activity, systemic immunity, Th1 immunity, TLR-2, Biology (General), QH301-705.5
Abstract

A probiotic strain Lactobacillus paracasei L9,which was isolated from human intestine, was investigated for its immunomodulatory activity in vivo. Results showed that L9 improved systemic immunity by enhancing the phagocytic activity of peritoneal macrophages, the proliferation ratio of splenocytes, the IgG level in the serum and the level of IgA in the mucosa. Further, L9induced theTh1-polarized immune response by elevating the IFN-γ/IL-4 ratio in the mucosa. This effect was confirmed by the enhanced IL-12-inducing activity of macrophages after in vitro stimulation of L9. Also detected was increased expression of TLR-2mRNA in the mucosa. We predict that L9 could enhance innate immunity by activating TLR-2 in the mucosa, and enhance acquired immunity by promoting Th1 polarization through induced production of IL-12 by macrophages.

Published
2016
Full Text
View/download PDF

141. Delivery of Curcumin Using Zein-Gum Arabic-Tannic Acid Composite Particles: Fabrication, Characterization, and in vitro Release Properties

Author

Zhang, Yiquan, Liu, Guiqiao, Ren, Fazheng, Liu, Ning, Tong, Yi, Li, Yi, Liu, Anni, Wu, Lida, and Wang, Pengjie

Subjects
Nutrition and Dietetics, Endocrinology, Diabetes and Metabolism, Food Science
Abstract

The application of curcumin (Cur) in fat-free food is limited due to its poor water solubility, stability, and bioaccessibility. In this study, zein-gum arabic-tannic acid (zein-GA-TA) composite particles with high physical stability were fabricated to deliver Cur (ZGT-Cur). Their stability and in vitro release properties were also evaluated. The results showed that the thermal and photochemical stability of Cur was improved after loading into composite particles. Meanwhile, the retention rate of Cur in ZGT-Cur composite particles was enhanced compared with Z-Cur or ZG-Cur particles. Fourier transform infrared (FTIR) spectroscopy confirmed that the hydrogen bond within the particles was greatly enhanced after the addition of tannic acid (TA). The in vitro antioxidant activity of Cur in ZGT-Cur composite particles was higher in terms of 2,2'-azino-bis (ABTS) (93.64%) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) (50.41%) compared with Z-Cur or ZG-Cur particles. The bioaccessibility of Cur in ZGT-Cur composite particles was 8.97 times higher than that of free Cur. Therefore, the particles designed in this study will broaden the application of Cur in the food industry by improving its stability and bioaccessibility.

Published
2022

Catalog

Books, media, physical & digital resources
See catalog results