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Catalytic oxidation of toluene by manganese oxides:Effect of K^(+)doping on oxygen vacancy

Journal of Environmental Sciences 2024年第8期142卷 43-56页

作者： Zhenzhen Huang Haiyang Li Xuejun Zhang Yanli Mao Yinghan wu Wei Liu Hongrun Gao Mengru Zhang Zhongxian Song Faculty of Environmental and Municipal Engineering Henan Key Laboratory of Water Pollution Control and Rehabilitation TechnologyHenan University of Urban ConstructionPingdingshan 467036China College of Environmental and Safety Engineering Shenyang University of Chemical TechnologyShenyang 110142China

Alkali metal potassium was beneficial to the electronic regulation and structural stability of transition metal ***,K ions were introduced into manganese oxides by different methods to improve the degradation efficiency of *** results of activity experiments indicated that KMnO_(4)-HT(HT:Hydrothermal method)exhibited outstanding low-temperature catalytic activity,and 90%conversion of toluene can be achieved at 243℃,which was 41℃and 43℃lower than that of KNO_(3)-HT and Mn-HT,*** largest specific surface area was observed on KMnO_(4)-HT,facilitating the adsorption of *** formation of cryptomelane structure over KMnO_(4)-HT could contribute to higher content of Mn^(3+)and lattice oxygen(Olatt),excellent low-temperature reducibility,and high oxygen mobility,which could increase the catalytic ***,two distinct degradation pathways were ***Ⅰ(KMnO_(4)-HT):toluene→benzyl→benzoic acid→carbonate→CO_(2)and H2O;PathwayⅡ(Mn-HT):toluene→benzyl alcohol→benzoic acid→phenol→maleic anhydride→CO_(2)and *** intermediates were detected on KMnO_(4)-HT,indicating its stronger oxidation capacity of toluene,which was originated from the doping of K^(+)and the interaction between *** intermediates were observed on Mn-HT,which can be attributed to the weaker oxidation ability of pure *** results indicated that the doping of K^(+)can improve the catalytic oxidation capacity of toluene,resulting in promoted degradation of intermediates during the oxidation of toluene.

关键词： Catalytic oxidation Preparation method Cryptomelane Mn^(3+)and lattice oxygen

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A mechanically coupled MEMS filter with high-q width extensional mode resonators

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Journal of Semiconductors 2024年第8期45卷 41-48页

作者： Wei Wang Wenli Liu Junyuan Zhao Bo Niu Zeyu wu Yinfang Zhu Jinling Yang Fuhua Yang Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

This work presents a novel radio frequency(RF)narrowband Si micro-electro-mechanical systems(MEMS)filter based on capacitively transduced slotted width extensional mode(WEM)*** flexibility of the plate leads to multiple modes near the target *** high q-factor resonators of around 100000 enable narrow bandwidth filters with small size and simplified *** 1-wavelength and 2-wavelength WEMs were first developed as a pair of coupled modes to form a *** reduce bandwidth,two plates are coupled with aλ-length coupling *** 79.69 MHz coupled plate filter(CPF)achieved a narrow bandwidth of 8.8 kHz,corresponding to a tiny 0.011%.The CPF exhibits an impressive 34.84 dB stopband rejection and 7.82 dB insertion loss with near-zero passband *** summary,the RF MEMS filter presented in this work shows promising potential for application in RF transceiver front-ends.

关键词： MEMS narrowband filter mechanically coupling quality factor width extensional mode

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Recent advances in transition metal phosphide materials:Synthesis and applications in supercapacitors

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Nano Materials Science 2024年第2期6卷 174-192页

作者： Ge Li Yu Feng Yi Yang Xiaoliang wu Xiumei Song Lichao Tan College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry University26 Hexing RoadHarbin150040PR China Institute of Carbon Neutrality Zhejiang Wanli UniversityNingbo315100PR China School of Materials Science and Chemical Engineering Harbin University of Science and TechnologyHarbin150040PR China

Supercapacitors(SCs)are considered promising energy storge systems because of their outstanding power density,fast charge and discharge rate and long-term cycling *** exploitation of cheap and efficient electrode materials is the key to improve the performance of *** the battery-type materials,transition metal phosphides(TMPs)possess high theoretical specific capacity,good electrical conductivity and superior structural stability,which have been extensively studied to be electrode materials for *** this review,we summarize the up-to-date progress on TMPs materials from diversified synthetic methods,diverse nanostructures and several prominent TMPs and their composites in application of *** the end,we also propose the remaining challenges toward the rational discovery and synthesis of high-performance TMP electrodes materials for energy storage.

关键词： Transition metal phosphides Cobalt phosphide Nickel phosphides Electrode materials Supercapacitor

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Rapid Simultaneous Determination of Four Ganoderic Acids in Ganoderma(Chinese Name:Lingzhi)by Direct Infusion-Multiple Reaction Monitoring Cubed

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Journal of Analysis and Testing 2024年第1期8卷 52-62页

作者： Nian wu Bo Peng Ting Li Pengfei Tu Shengpeng Wang Bo Li Wenjing Liu Yuelin Song Modern Research Center for Traditional Chinese Medicine Beijing Research Institute of Chinese MedicineBeijing University of Chinese MedicineBeijing 100029China Amway(China)Botanical Research Center Wuxi 214011China State Key Laboratory of quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoTaipa 999078China Amway(Shanghai)Innovation&Science Co. LtdShanghai 201508China School of Pharmacy Henan University of Chinese MedicineZhengzhou 450046China

Attributing to the rapid demand expansion for the edible medicinal materials in the market,the limited throughput of highperformance liquid chromatography-multiple reaction monitoring(HPLC-MRM)cannot fully address the measurement workload for a huge number of testing ***,it is urgent to pursue more efficient approaches for the quality *** of the greater selectivity of MRM cubed(MRM^(3))over MRM,there might be a chance to omit the time-intensive LC *** current study,we attempted to develop a direct infusion(DI)-MRM^(3) program,and the applicability was thereafter assessed through simultaneous determination of four ganoderic acids(GAs)in one of the most famous tonic herbal medicines namely Ganoderma(Chinese name:Lingzhi).Primary parameters such as q1>q3>qLIT ion transitions,collision energy(CE),and excitation energy were optimized by programming online energy-resolved mass spectrometry with authentic compounds.A single DI-MRM measurement merely costed four minutes,and in spite of the wide occurrences of isomers,satisfactory selectivity was *** validation assays demonstrated the method to be sensitive,precise,accurate,and *** q.antitative results from DI-MRM^(3) were also justified by conducting LC-MRM measurements in *** differences occurred for the content patterns between the two original sources namely Ganoderma lucidum and ***,and,moreover,either cultivar or harvest time showed dramatical influence on the q.antitative features of the four targeted *** importantly,DI-MRM3 is a meaningful analytical option for rapid q.antitative analysis of herbal medicines,because of the comparable reliability,nonetheless,less consumptions of both measurement time and solvent,compared with LC-MRM.

关键词： Direct infusion Multiple reaction monitoring cubed High-throughput q.antitative analysis Ganoderic acids Ganoderma

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Gas source of the Middle Jurassic Shaximiao Formation in the Zhongjiang large gas field of Western Sichuan Depression:Constraints from geochemical characteristics of light hydrocarbons

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Energy Geoscience 2024年第2期5卷 141-151页

作者： Xiaoqi wu Jun Yang Ping Wang Huaji Li Yingbin Chen Chunhua Ni Huasheng Zeng wuxi Research Institute of Petroleum Geology Petroleum Exploration and Production Research InstituteSINOPECWuxi214126China Key Laboratory of Hydrocarbon Accumulation SINOPECWuxi214126China No.3 Gas Production Plant Southwest Petroleum BranchSINOPECDeyang618000China

The Zhongjiang gas field is a typical large gas field in terrigenous strata of the Western Sichuan *** remains debatable which member of the Upper Triassic Xujiahe Formation served as the source rocks and how significant the member contributed to the gas accumulations in the Zhongjiang gas *** this study,we analyzed the essential characteristics of the Lower Jurassic source rocks and the geochemical features of light hydrocarbons in natural gas from the 2nd(T3χ^(2))and 4th members(T3χ^(4))of the Upper Triassic Xujiahe Formation(T3χ),as well as the Middle Jurassic Shaximiao(J2s)and q.anfoya(J2q)*** on this,we explored the sources of the natural gas in the Zhongjiang gas field and determined the natural gas migration patterns and their effects on the properties of light hydrocarbons in the natural *** results indicate that the Lower Jurassic lacustrine source rocks of the Zhongjiang gas field contain humic organic matter,with vitrinite reflectance(R_(0))values ranging from 0.86%to 0.98%.Samples meeting the criterion for effective source rocks[total organic carbon(TOC)content≥0.75%]exhibited an average TOC content of merely 1.02%,suggesting significantly lower hydrocarbon generation potential than source rocks in the underlying T3x,which show higher thermal maturity and TOC *** natural gas samples from T3χ^(2),T3χ^(4),J2s,and J2q reservoirs,their C_(5-7)iso-alkane content was significantly higher than their n-alkane content,and their methylcyclohexane(MCH)index ranged from 59.0%to 77.3%,indicating the predominance of methylcyclohexane in C_(7)light *** indicated by the origin identification and gas-source correlation based on the geochemical features of light hydrocarbons,the natural gas in the Zhongjiang gas field is typical coal-derived *** gas from the primary pay zone of the Shaximiao Formation,with significantly high K_(1),(P_(2)+N_(2))/C_(7),and P_(3)/C_(7)values,predominantly originated from the 5th member

关键词： Zhongjiang gas field Source rock Origin of natural gas Light hydrocarbon geochemistry Natural gas migration

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Non-alcoholic fatty liver degree and long-term risk of incident inflammatory bowel disease: A large-scale prospective cohort study

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中华医学杂志(英文版) 2024年第14期137卷 2023 Nov 13页

作者： Zhang q.an Liu Si wu Jing Zhu Shengtao wu Yongdong wu Shanshan Zhang Shutian Department of Gastroenterology Beijing Friendship Hospital Capital Medical University National Clinical Research Center for Digestive Disease Beijing Digestive Disease Center Beijing Key Laboratory for Precancerous Lesion of Digestive Disease Beijing China

Background: Non-alcoholic fatty liver disease (NAFLD) and inflammatory bowel disease (IBD) have shown similar worsening epidemic patterns globally and shared various overlapping pathophysiological mechanisms. However, evidence on the relationship between NAFLD and IBD risk is lacking. We aimed to investigate the associations between long-term risk of incident IBD and NAFLD in a large prospective ***: Participants from the United Kingdom Biobank cohort (https://***/) who were free of IBD and alcoholic liver disease at baseline were enrolled. Baseline non-alcoholic fatty liver degree was measured by the well-established fatty liver index (FLI). The outcomes of interest included incident IBD, ulcerative colitis (UC), and Crohn’s disease (CD). Multivariable Cox proportional hazard regression was used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs).Results: Among 418,721 participants (mean FLI: 48.11 ± 30.11), 160,807 (38.40%) participants were diagnosed as NAFLD at baseline. During a median of 12.4 years’ follow-up, 2346 incident IBD cases (1545 UC, 653 CD, and 148 IBD-unclassified) were identified. Due to limited events, those IBD-unclassified were combined in UC or CD when examining the associated risk of UC or CD, separately. Compared with the lowest quartile of FLI, the highest quartile showed a separately 36.00%, 25.00%, and 58.00% higher risk of incident IBD (HRq4vs. q1 =1.36, 95% CI: 1.19-1.55,Ptrend q4vs. q1 =1.25, 95% CI: 1.07-1.46,Ptrend=0.047), and CD (HRq4vs. q1 =1.58, 95% CI: 1.26-1.97,Ptrend <0.001) after multivariable adjustment. Compared with non-NAFLD, NAFLD participants had a significantly higher risk of incident IBD (HR=1.13, 95% CI: 1.04-1.24) and CD (HR =1.36, 95% CI: 1.17-1.58).Conclusions: Higher degree of non-alcoholic fatty liver is associated with increased risk of incident IBD. Interventions aimed at improving NAFLD may be a potential targeted strategy for the detection and treatm

关键词： Non-alcoholic fatty liver disease Inflammatory bowel disease Ulcerative colitis Crohn’s disease Cohort study

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The action mechanism by which C1q/tumor necrosis factor-related protein-6 alleviates cerebral ischemia/reperfusion injury in diabetic mice

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Neural Regeneration Research 2024年第9期19卷 2019-2026页

作者： Bo Zhao Mei Li Bingyu Li Yanan Li q.anni Shen Jiabao Hou Yang wu Lijuan Gu Wenwei Gao Department of Anesthesiology Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina Central Laboratory Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina Department of Critical Care Medicine Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina

Studies have shown that C1q/tumor necrosis factor-related protein-6 (CTRP6) can alleviate renal ischemia/reperfusion injury in mice. However, its role in the brain remains poorly understood. To investigate the role of CTRP6 in cerebral ischemia/reperfusion injury associated with diabetes mellitus, a diabetes mellitus mouse model of cerebral ischemia/reperfusion injury was established by occlusion of the middle cerebral artery. To overexpress CTRP6 in the brain, an adeno-associated virus carrying CTRP6 was injected into the lateral ventricle. The result was that oxygen injury and inflammation in brain tissue were clearly attenuated, and the number of neurons was greatly reduced. In vitro experiments showed that CTRP6 knockout exacerbated oxidative damage, inflammatory reaction, and apoptosis in cerebral cortical neurons in high glucose hypoxia-simulated diabetic cerebral ischemia/reperfusion injury. CTRP6 overexpression enhanced the sirtuin-1 signaling pathway in diabetic brains after ischemia/reperfusion injury. To investigate the mechanism underlying these effects, we examined mice with depletion of brain tissue-specific sirtuin-1. CTRP6-like protection was achieved by activating the sirtuin-1 signaling pathway. Taken together, these results indicate that CTRP6 likely attenuates cerebral ischemia/reperfusion injury through activation of the sirtuin-1 signaling pathway.

关键词： brain C1q/tumor necrosis factor-related protein-6 cerebral apoptosis diabetes inflammation ischemia/reperfusion injury neuron neuroprotection oxidative damage Sirt1

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Critical Opalescence and Its Impact on the Jet quenching Parameter q

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Chinese Physics Letters 2024年第3期41卷 23-29页

作者：武警曹杉杉李峰 School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China Research Center for Hadron and CSR Physics Lanzhou University and Institute of Modern Physics of CASLanzhou 730000China Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Provinceand Frontiers Science Center for Rare IsotopesLanzhou UniversityLanzhou 730000China Frontiers Science Center for Rare Isotopes Lanzhou UniversityLanzhou 730000China

Jet quenching parameter q is essential for characterizing the interaction strength between jet partons and nuclear *** on the quark-meson model,we develop a new framework for calculating q at finite chemical potential... 详细信息

关键词： parameter quark calculating

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Weavable thermoelectrics: advances, controversies, and future developments

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Materials Futures 2024年第1期3卷 63-94页

作者： Xiao-Lei Shi Shuai Sun Ting wu Jian Tu Zhiming Zhou qingfeng Liu Zhi-Gang Chen School of Chemistry and Physics ARC Research Hub in Zero-emission Power Generation for Carbon Neutralityand Centre for Materials ScienceQueensland University of TechnologyBrisbaneQueensland4000Australia State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211800People’s Republic of China School of Materials Science and Engineering Chongqing University of TechnologyChongqing 400054People’s Republic of China

Owing to the capability of the conversion between thermal energy and electrical energy and their advantages of light weight,compactness,noise-free operation,and precision reliability,wearable thermoelectrics show great potential for diverse *** them,weavable thermoelectrics,a subclass with inherent flexibility,wearability,and operability,find utility in harnessing waste heat from irregular heat *** the rapid advancements in this field,a timely review is essential to consolidate the progress and ***,we provide an overview of the state of weavable thermoelectric materials and devices in wearable smart textiles,encompassing mechanisms,materials,fabrications,device structures,and applications from recent advancements,challenges,and *** review can serve as a valuable reference for researchers in the field of flexible wearable thermoelectric materials and devices and their applications.

关键词： thermoelectric weaving materials structure device

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Landscape of Sequence Variations in Homologous Copies of FAD2 and FAD3 in Rapeseed(Brassica napus L.)Germplasm with High/Low Linolenic Acid Trait

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Phyton-International Journal of Experimental Botany 2024年第3期93卷 627-640页

作者： Haoxue wu Xiaohan Zhang Xiaoyu Chen Kang Li Aixia Xu Zhen Huang Jungang Dong Chengyu Yu College of Agronomy Northwest A&F UniversityYangling712100China

Genetic manipulation(either restraint or enhancement)of the biosynthesis pathway ofα-linolenic acid(ALA)in seed oil is an important goal in Brassica napus *** is a tetraploid plant whose genome often har-bors four and six homologous copies,respectively,of the two fatty acid desaturases FAD2 and FAD3,which con-trol the last two steps of ALA biosynthesis during seed oil *** this study,we compared their promoters,coding sequences,and expression levels in three high-ALA inbred lines 2006L,R8q10,and YH25005,a low-ALA line A28,a low-ALA/high-oleic-acid accession SW,and the wildtype *** expression levels of most FAD2 and FAD3 homologs in the three high-ALA accessions were higher than those in ZS11 and much higher than those in A28 and *** three high-ALA accessions shared similar sequences with the pro-moters and CDSs of BnFAD3.C4 and *** A28 and SW,substitution of three amino acid residues in BnFAD2.A5 and BnFAD2.C5,an absence of BnFAD2.C1 locus,and a 549 bp long deletion on the BnFAD3.A3 promoter were *** proﬁle of BnFAD2 mutation in the two low-ALA accessions A28 and SW is different from that reported in previous *** mutations in BnFAD3 in the high-ALA accessions are reported for theﬁrst *** identifying the sites of these mutations,we provide detailed information to aid the design of mole-cular markers for accelerated breeding schemes.

关键词： Brassica napus linolenic acid FAD2 FAD3 promoter coding sequences mutation

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