Salt-controlled dissolution in pigment cathode for high-capacity and long-life magnesium organic batteries

Cui, Lianmeng,Zhou, Limin,Zhang, Kai,Xiong, Fangyu,Tan, Shuangshuang,Li, Maosheng,An, Qinyou,Kang, Yong-Mook,Mai, Liqiang Elsevier 2019 Nano energy Vol.65 No.-

<P><B>Abstract</B></P> <P>Benefiting from high volumetric energy density and generally dendrite-free growth of Mg metal, rechargeable magnesium batteries (MBs) become a promising next-generation energy storage system. Organic electrode materials, with characteristic of sustainable resource and flexible structure, have been widely studied in alkali metal ion batteries, but are rarely reported in MBs. Herein, we demonstrate that 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) serves as a cathode material for MBs in non-aqueous system, which realizes a fast diffusion kinetics and remarkable Mg-storage performance through a salt-dissolution inhibition approach for the electrolyte. The PTCDA exhibits a reversible capacity of 126 mAh g<SUP>−1</SUP> (at 200 mA g<SUP>−1</SUP>), excellent rate performance, and good cycling stability (100 mAh g<SUP>−1</SUP> even after 150 cycles). Furthermore, the evolution mechanism of the PTCDA electrode based on the transformation between carbonyl groups (CO) and enolate groups (C–O) is revealed by <I>ex-situ</I> phase characterization and functional group analysis. Besides, the dissolution inhibition of the PTCDA could also be realized through the incorporation of other soluble salt (KCl or NaCl) into all phenyl complex (APC) electrolyte, resulting in an enhanced cycling capacity. Considering the designable configuration of the organic materials, this work would pave way for their utilization on multi-valent ion batteries and provide efficient strategy to realize high voltage and satisfied cycle life.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The magnesium anode in organic system was realized combined with the solubility inhibition of the host materials. </LI> <LI> Compared with other inorganic cathode materials, the PTCDA is eligible to offset the defect of Mg<SUP>2+</SUP> transport dynamics. </LI> <LI> Compared with other Mg-storage materials reported, the PTCDA demonstrates a high working voltage plateau and a small polarization. </LI> <LI> The electrochemical mechanism of the PTCDA is proved to be the transformation between carbonyl groups and enolate groups. </LI> <LI> The incorporation of dissolvable salts inhibited the dissolution of the PTCDA. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

LncRNA PVT1 upregulates FBN1 by sponging miR-30b-5p to aggravate pulpitis

Li Yuanyuan,Li Shuangshuang,Li Ruijing,Xu Huilin 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.2

Background Pulpitis is a disease mainly caused by bacterial infection. Long noncoding RNAs (lncRNAs) infl uence the advancement of pulpitis. In this paper, we reconnoitered the characters of lncRNA plasmacytoma variant translocation 1 (PVT1) in pulpitis. Objective PVT1, microRNA-30b-5p (miR-30b-5p) and fi brillin 1 (FBN1) levels were identifi ed by qRT-PCR and western blot. In addition, the cell functions were scrutinized. Additionally, the link between miR-30b-5p and PVT1 or FBN1 was identifi ed by dual-luciferase reporter assay. Result The contents of PVT1 and FBN1 were augmented, but the miR-30b-5p level was declined in pulpitis. Knockdown of PVT1 enhanced cell proliferation and cell vitality, whereas inhibited cell infl ammatory reaction in HDPFs under LPS stimulation. In mechanism, PVT1 acted as a miR-30b-5p sponge to adjust the content of FBN1. Moreover, miR-30b-5p mediated LPS-mediated repression of proliferation and promotion of infl ammatory reaction HDPFs by FBN1. Conclusion PVT1 expedited the improvement of pulpitis via miR-30b-5p/FBN1.

Molecular cloning, subcellular localization, and expression of BsWRKY51 gene from Bletilla striata

Wang Shuangshuang,Zheng Yuxia,Dou Quanli,Zhang Zhengling,Zeng Boping,Li Ying,Qian Yongchun,Ma Li 한국식물생명공학회 2024 Plant biotechnology reports Vol.18 No.2

The WRKY transcription factor family plays a key role in plant growth and development, hormone signaling, and resistance to environmental stress. In this study, we investigated the gene sequence, subcellular localization, and response pattern of a member of the WRKY transcription factor family to reveal its protein structure and involvement in the resistance signaling pathway.The BsWRKY51 gene was cloned by RT-PCR, and the structural characteristics of its encoded protein WRKY51 were analyzed by bioinformatics. The vector was next transiently transformed into tobacco to analyze the subcellular locali- zation, and real-time fluorescence quantitative PCR was performed to analyze the changes in the expression pattern of BsWRKY51. The BsWRKY51 gene has a coding sequence (CDS) length of 987 bp.The respective unstable hydrophilic protein BsWRKY51 is localized in the nucleus. It most closely related to the WRKY protein of Dendrobium catenatum in the Orchidaceae family. Fluorescence quantitative PCR results showed that the BsWRKY51 expression in the leaves was significantly higher than that in the roots, stems, and pseudobulbs of Bletilla striata seedlings. Under the conditions of salt and drought stress, the BsWRKY51 expression gradual increased and then a slightly decreased, and under salicylic acid (SA) treatment, the expression of BsWRKY51 showed an overall decreasing trend.The BsWRKY51 gene of Bletilla striata may play an important regulatory role in its salt and drought stress responses. Our present findings provide the foundation for elucidating the mechanisms of salt and drought tolerance in Bletilla striata and for breeding new varieties.

A Study of Agricultural Meteorological Monitoring System Based on Wireless Sensor Networks

Li Ma,Jingzhou Yan,Shuangshuang Yan,Baowei Wang,Jin Wang,Kuo Liao 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.7

Multi Functionalization of Polypropylene with Controlled Degradation and Its Structure Characterization

Shuangshuang Wang,Jiruo Zhao,Na Wang,Li Meng,Ying Feng 한국고분자학회 2011 Macromolecular Research Vol.19 No.9

The multi functionalization of isotactic polypropylenes (iPP) with glycidyl methacrylate (GMA) was carried out by in situ chlorinating graft copolymerization (ISCGC), in which chlorine (Cl2) is used as a radical initiator as well as a radical scavenger. The molecular weight measurement indicates that functionalized iPP with controlled degradation could be obtained because the unstable radicals that induce iPP degradation could be terminated quickly by chlorine. Owing to the unique allyl-containing structure of GMA, multi functionalized iPP could be synthesized under the effect of chlorine, which contained both epoxy groups and C=C double bonds as well as trace amount of chlorine atoms in the functionalized polymer structure. The structure of both the functionalization polymer and homopolymer formed in this system were analyzed by FTIR and ^1H NMR. The mechanism of grafting reaction, iPP chain degradation, and GMA homopolymer formation scheme in ISCGC were proposed. The thermal properties of the functionalized polymer are also discussed.

Effects of N-acetylcysteine on the energy status and antioxidant capacity in heart and liver of cold-stressed broilers

Li Chengcheng,Peng Meng,Liao Man,Guo Shuangshuang,Hou Yongqing,Ding Binying,Wu Tao,Yi Dan 아세아·태평양축산학회 2020 Animal Bioscience Vol.33 No.9

Objective: Cold stress induces oxidative damage and impairs energy status of broilers. N-acetylcysteine (NAC) exhibits antioxidant properties and modulates energy metabolism of animals. This study was conducted to investigate the effects of NAC on energy status and antioxidant capacity of heart and liver in the cold-stressed broilers. Methods: The experiment consisted of 4 treatments in a 2×2 factorial arrangement with two diets (basal diet or plus 0.1% NAC) and two ambient temperatures (thermoneutral [conventional ambient temperature] or cold stress [10°C±1°C during days 15 to 42]). Results: No ascites were seen in cold-stressed broilers. NAC did not attenuate the impaired growth performance of stressed birds. However, NAC decreased plasma asparagine but increased aspartate levels in cold-stressed birds (p<0.05). NAC reduced hepatic adenosine triphosphate (ATP) but elevated adenosine diphosphate contents in unstressed birds (p< 0.05). The hepatic ratio of adenosine monophosphate (AMP) to ATP was increased in birds fed NAC (p<0.05). NAC decreased plasma malondialdehyde (MDA) level and cardiac total superoxide dismutase (T-SOD) activity in unstressed birds, but increased hepatic activities of T-SOD, catalase and glutathione peroxidase in stressed birds (p<0.05). NAC down-regulated hepatic AMP-activated protein kinase but up-regulated cardiac heme-oxigenase mRNA expression in stressed birds, and decreased expression of hepatic peroxisome proliferator-activated receptor coactivator-1α as well as hypoxia-inducible factor-1α in liver and heart of birds. Conclusion: Dietary NAC did not affect energy status but enhanced the hepatic antioxidant capacity by increasing the activities of antioxidant enzymes in cold-stressed broilers.

Impact of Liver Fibrosis and Fatty Liver on T1rho Measurements: A Prospective Study

Shuangshuang Xie,Qing Li,Yue Cheng,Yu Zhang,Zhizheng Zhuo,Guiming Zhao,Wen Shen 대한영상의학회 2017 Korean Journal of Radiology Vol.18 No.6

Objective: To investigate the liver T1rho values for detecting fibrosis, and the potential impact of fatty liver on T1rho measurements. Materials and Methods: This study included 18 healthy subjects, 18 patients with fatty liver, and 18 patients with liver fibrosis, who underwent T1rho MRI and mDIXON collections. Liver T1rho, proton density fat fraction (PDFF) and T2* values were measured and compared among the three groups. Receiver operating characteristic (ROC) curve analysis was performed to evaluate the T1rho values for detecting liver fibrosis. Liver T1rho values were correlated with PDFF, T2* values and clinical data. Results: Liver T1rho and PDFF values were significantly different (p < 0.001), whereas the T2* (p = 0.766) values were similar, among the three groups. Mean liver T1rho values in the fibrotic group (52.6 ± 6.8 ms) were significantly higher than those of healthy subjects (44.9 ± 2.8 ms, p < 0.001) and fatty liver group (45.0 ± 3.5 ms, p < 0.001). Mean liver T1rho values were similar between healthy subjects and fatty liver group (p = 0.999). PDFF values in the fatty liver group (16.07 ± 10.59%) were significantly higher than those of healthy subjects (1.43 ± 1.36%, p < 0.001) and fibrosis group (1.07 ± 1.06%, p < 0.001). PDFF values were similar in healthy subjects and fibrosis group (p = 0.984). Mean T1rho values performed well to detect fibrosis at a threshold of 49.5 ms (area under the ROC curve, 0.855), had a moderate correlation with liver stiffness (r = 0.671, p = 0.012), and no correlation with PDFF, T2* values, subject age, or body mass index (p > 0.05). Conclusion: T1rho MRI is useful for noninvasive detection of liver fibrosis, and may not be affected with the presence of fatty liver.

Experimental Study on Thermal Catalytic Degradation of SF6 Waste Gas by Metal Phosphate

Zhang Xiaoxing,Li Xiaohan,Wang Yi,Meng Fei,Zou Yi,Tian Shuangshuang,Cui Zhaolun 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.2

In recent years, SF6 has been widely used in the electrical industry. The amount of SF6 waste gas produced by the corresponding gas insulated equipment is increasing year by year. However, SF6 has high global warming potential and long atmospheric life. Proper treatment of SF6 waste gas is particularly important for environmental protection. Thermal degradation can effectively eliminate the greenhouse effect caused by direct emission of SF6. In this paper, AlPO4, Zr3(PO4)4 and CePO4 were used as catalysts to degrade SF6/air mixture gas (The concentration of SF6 is 15%) at 800 °C. The concentration of SF6 gas was detected by gas chromatography (GC), and the gas decomposition products of SF6 were detected by gas chromatography mass spectrometry (GCMS) and fourier transform infrared spectroscopy (FTIR). The surface morphology and composition of the catalyst were analyzed by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The results show that the three kinds of metal phosphates can promote the decomposition of SF6 gas, among which CePO4 had the best catalytic degradation effect, and the degradation rate of SF6 reached 84.7% in 12 h. The main products of SF6 gas thermal catalytic degradation include SF4, S2F10, SO2F2, SOF2, SiF4 and SO2 gas, etc. SEM scanning image shows that there were some objects adsorbed on the surface of CePO4 catalyst after the experiment. XPS spectra showed that Si and F elements were added to the catalyst. According to the binding energy, SiF4 was adsorbed on the catalyst. After the experiment, CeF3 was produced by CePO4 catalyst. Different catalysts have their own selectivity to the decomposition products of SF6, which is convenient for the treatment of products, and it is of great significance to eliminate the greenhouse effect caused by the waste gas of SF6.

Visualizing the distributions and spatiotemporal changes of metabolites in Panax notoginseng by MALDI mass spectrometry imaging

Chenglong Sun,Shuangshuang Ma,Lili Li,Daijie Wang,Wei Liu,Feng Liu,Lanping Guo,Xiao Wang 고려인삼학회 2021 Journal of Ginseng Research Vol.45 No.6

Background: Panax notoginseng is a highly valued medicinal herb used widely in China and many Asiancountries. Its root and rhizome have long been used for the treatment of cardiovascular and hematologicaldiseases. Imaging the spatial distributions and dynamics of metabolites in heterogeneous planttissues is significant for characterizing the metabolic networks of Panax notoginseng, and this will alsoprovide a highly informative approach to understand the complex molecular changes in the processing ofPanax notoginseng. Methods: Here, a high-sensitive MALDI-MS imaging method was developed and adopted to visualize thespatial distributions and spatiotemporal changes of metabolites in different botanical parts of Panaxnotoginseng. Results: A wide spectrum of metabolites including notoginsenosides, ginsenosides, amino acids, dencichine,gluconic acid, and low-molecular-weight organic acids were imaged in Panax notoginseng rhizomeand root tissues for the first time. Moreover, the spatiotemporal alterations of metabolites during thesteaming of Panax notoginseng root were also characterized in this study. And, a series of metabolitessuch as dencichine, arginine and glutamine that changed with the steaming of Panax notoginseng weresuccessfully screened out and imaged. Conclusion: These spatially-resolved metabolite data not only enhance our understanding of the Panaxnotoginseng metabolic networks, but also provide dire

Influence of wheat-walnut intercropping on the Sitobion avenae and its predatory natural enemies

Gao Haifeng,Jia Shuangshuang,Liu Yongqiang,Shen Yuyang,Li Guangkuo,Zhao Sifeng,Ge Feng 한국응용곤충학회 2024 Journal of Asia-Pacific Entomology Vol.27 No.1

Intercropping is widely applied all over the world, and it often causes significant changes in the number of arthropod communities. Walnut-wheat intercropping systems are commonly applied in Southern Xinjiang of China. But it is still not clear how wheat-walnut intercropping influence pest and natural enemy populations, and their ratio in wheat fields. To clarify this question and provide guidance to pest management, field surveys were conducted in Xinjiang during 2017–2019. Three intercropping treatments were tested, which were wheat-walnut 10:6, 25:6, and monoculture wheat. Our results showed that the abundance of predators (mainly ladybeetles and lacewings) increased in wheat under wheat-walnut intercropping systems (especially in intercrop treatment 10:6). Compared with monoculture wheat, the ratio of predators to Sitobion avenae was not enhanced in wheatwalnut intercropping fields. S. avenae populations increased in the walnut intercropped wheat fields. The intercropping system was not beneficial to S. avenae control in wheat fields. Different measures should be taken to strengthen the control of S. avenae in walnut intercropped wheat fields.