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450 results on '"Shen, Shigang"'

64. In‐Situ Integration of a Hydrophobic and Fast‐Zn2+‐Conductive Inorganic Interphase to Stabilize Zn Metal Anodes.

Author

Liu, Mengyu, Yuan, Wentao, Ma, Guoqiang, Qiu, Kaiyue, Nie, Xueyu, Liu, Yongchang, Shen, Shigang, and Zhang, Ning

Subjects
ANODES, METALS, ION channels, EROSION
Abstract

The irreversible issues of Zn anode stemming from dendrite growth and water‐induced erosion have severely hindered the commercialization of rechargeable aqueous Zn batteries. Herein, a hydrophobic and fast‐Zn2+‐conductive zinc hexacyanoferrate (HB‐ZnHCF) interphase layer is in situ integrated on Zn by a rapid room‐temperature wet‐chemistry method to address these dilemmas. Different from currently proposed hydrophilic inorganic cases, the hydrophobic and compact HB‐ZnHCF interphase effectively prevents the access of water molecules to Zn surface, thus avoiding H2 evolution and Zn corrosion. Moreover, the HB‐ZnHCF with large internal ion channels, strong zincophilicity, and high Zn2+ transference number (0.86) permits fast Zn2+ transport and enables smooth Zn deposition. Remarkably, the resultant HB‐ZnHCF@Zn electrode delivers unprecedented reversibility with 99.88 % Coulombic efficiency over 3000 cycles, realizes long‐term cycling over 5800 h (>8 months, 1 mA cm−2) and 1000 h (10 mA cm−2), and assures the stable operation of full Zn battery with both coin‐ and pouch‐type configurations. [ABSTRACT FROM AUTHOR]

Published
2023
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90. Design, Synthesis and Characterization of a Novel Type of Thermo-Responsible Phospholipid Microcapsule-Alginate Composite Hydrogel for Drug Delivery

Author

Ding, Liang, Cui, Xinxia, Jiang, Rui, Zhou, Keya, Wen, Yalei, Wang, Chenfeng, Yue, Zhilian, Shen, Shigang, Pan, Xuefeng, Ding, Liang, Cui, Xinxia, Jiang, Rui, Zhou, Keya, Wen, Yalei, Wang, Chenfeng, Yue, Zhilian, Shen, Shigang, and Pan, Xuefeng

Abstract

Liposomes are extensively used in drug delivery, while alginates are widely used in tissue engineering. However, liposomes are usually thermally unstable and drug-leaking when in liquids, while the drug carriers made of alginates show low loading capacities when used for drug delivery. Herein, we developed a type of thermo-responsible liposome-alginate composite hydrogel (TSPMAH) by grafting thermo-responsive liposomes onto alginates by using Ca2+ mediated bonding between the phosphatidic serine (PS) in the liposome membrane and the alginate. The temperature-sensitivity of the liposomes was actualized by using phospholipids comprising dipalmitoylphosphatidylcholine (DPPC) and PS and the liposomes were prepared by a thin-film dispersion method. The TSPMAH was then successfully prepared by bridge-linking the microcapsules onto the alginate hydrogel via PS-Ca2+-Carboxyl-alginate interaction. Characterizations of the TSPMAH were carried out using scanning electron microscopy, transform infrared spectroscopy, and laser scanning confocal microscopy, respectively. Their rheological property was also characterized by using a rheometer. Cytotoxicity evaluations of the TSPMAH showed that the composite hydrogel was biocompatible, safe, and non-toxic. Further, loading and thermos-inducible release of model drugs encapsulated by the TSPMAH as a drug carrier system was also studied by making protamine-siRNA complex-carrying TSPMAH drug carriers. Our results indicated that the TSPMAH described herein has great potentials to be further developed into an intelligent drug delivery system.

Published
2020

96. Simultaneous determination and risk assessment of highly toxic pesticides in the market-sold vegetables and fruits in China: A 4-year investigational study

Author

Xuechong Lv, Shuxuan Liang, Hui Li, Cao Tengliang, Guo-fang Pang, Shen Shigang, Bai Ruobin, and Qiaoying Chang

Subjects
Adult, China, Phorate, Maximum Residue Limit, Health, Toxicology and Mutagenesis, Population, 0211 other engineering and technologies, Food Contamination, Maximum residue limit, 02 engineering and technology, 010501 environmental sciences, Biology, Risk Assessment, 01 natural sciences, Environmental pollution, Fruits, Dietary Exposure, Toxicology, chemistry.chemical_compound, Vegetables, Humans, GE1-350, Omethoate, Child, education, 0105 earth and related environmental sciences, 021110 strategic, defence & security studies, education.field_of_study, Phosphamidon, Pesticide Residues, Public Health, Environmental and Occupational Health, food and beverages, Dietary risk assessment, General Medicine, Pesticide, Pollution, Hazard quotient, Environmental sciences, TD172-193.5, chemistry, Fruit, Highly toxic pesticides, Carbofuran
Abstract

This study investigated the levels of highly toxic pesticides (HTPs) in 6554 vegetable and fruit samples from 31 regions of China, along with the associated risk of dietary exposure for the population between 2014 and 2017. 18 HTPs were detected in 325 (4.96%) samples, and the levels of HTPs in 103 (1.57%) samples were found to be higher than the maximum residue limits (MRLs) of China. The rate of detection of HTPs in six types of vegetables and fruits, in a decreasing order, was found to be as follows: eggplant (8.84%) >grape (5.58%) >tomato (5.43%) >cucumber (5.43%) >pear (3.12%) >apple (2.30%). The level of contamination of HTPs was found to be higher in vegetables compared with fruits. The vegetable and fruit samples with the highest percentages of HTPs exceeding MRLs were found in eggplants from Guangxi (20%) and grapes from Inner Mongolia (12.5%), respectively. Both, the average target hazard quotient (THQ) of a single highly toxic pesticide (HTP) and the average hazard index (HI) of the mixture of HTPs for adults and children from vegetables and fruits from the 31 regions were found to be less than one. Omethoate, carbofuran, ethoprophos, triazophos, and phorate were identified as the major contributors to the average HI for vegetables, and carbofuran, ethoprophos, omethoate, phorate, and phosphamidon were identified as the primary contributors to the average HI for fruits. The results of this study revealed that HTPs in vegetables and fruits did not cause any significant chronic risk of dietary exposure. The detection of HTPs exceeding MRLs in some of the samples implied that appropriate management guidelines for HTPs should be implemented to protect the health of the consumers.

Published
2021

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