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Calcium-based polymers for suppression of soil acidification by improving acid-buffering capacity and inhibiting nitrification

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Journal of Environmental Sciences 2024年第5期139卷 138-149页

作者： Fei kang Yunshan Meng Yanning Ge Yun Zhang Haixiang Gao Xueqin Ren Jie Wang Shuwen hu Beijing Key Laboratory of Farmland Soil Pollution Prevention-control and Remediation College of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China Department of Applied Chemistry China Agricultural UniversityBeijing 100193China

Soil acidification is a major threat to agricultural sustainability in tropical and subtropical *** and environmentally friendly materials,such as calcium lignosulfonate(CaLS),calcium poly(aspartic acid)(PASP-Ca),and calcium polyγ-glutamic acid(γ-PGA-Ca),are known to effectively ameliorate soil ***,their effectiveness in inhibiting soil acidification has not been *** study aimed to evaluate the effect of CaLS,PASP-Ca,andγ-PGA-Ca on the resistance of soil toward acidification as directly and indirectly(i.e.,via nitrification)caused by the application of HNO_(3)and urea,*** comparison,Ca(OH)_(2)and lignin were used as the inorganic and organic controls,*** the materials,γ-PGA-Ca drove the substantial improvements in the pH buffering capacity(pHBC)of the soil and exhibited the greatest potential in inhibiting HNO_(3)-induced soil acidification via protonation of carboxyl,complexing with Al~(3+),and cation exchange *** acidification induced by urea,CaLS was the optimal one in inhibiting acidification and increasing exchangeable acidity during ***,the sharp reduction in the population sizes of ammonia-oxidizing bacteria(AOB)and ammonia-oxidizing archaea(AOA)confirmed the inhibition of nitrification via CaLS ***,compared to improving soil pHBC,CaLS may play a more important role in suppressing indirect ***,γ-PGA-Ca was superior to PASP-Ca and CaLS in enhancing the soil pHBC and the its resistance to acidification induced by HNO_(3) addition,whereas CaLS was the best at suppressing urea-driven soil acidification by inhibiting *** conclusion,these results provide a reference for inhibiting soil re-acidification in intensive agricultural systems.

关键词： Calcium-based polymer Soil acidification pH buffering capacity Nitrification inhibition

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右美托咪定与丙泊酚对肝脏肿块切除术患儿血流动力学、应激反应和免疫功能影响的对比研究

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现代生物医学进展 2024年第13期24卷 2463-2466,2433页

作者：韩笑李正民闫辉王学佳张进虎崇康空军军医大学唐都医院麻醉科陕西西安710000 空军军医大学唐都医院儿科陕西西安710000

目的:对比右美托咪定与丙泊酚对肝脏肿块切除术患儿血流动力学、应激反应和免疫功能影响。方法:采用随机数字表法将2021年5月~2023年4月期间我院收治的择期行肝脏肿块切除术患儿90例分为右美托咪定组(采用右美托咪定麻醉)、丙泊酚组(采... 详细信息

目的:对比右美托咪定与丙泊酚对肝脏肿块切除术患儿血流动力学、应激反应和免疫功能影响。方法:采用随机数字表法将2021年5月~2023年4月期间我院收治的择期行肝脏肿块切除术患儿90例分为右美托咪定组(采用右美托咪定麻醉)、丙泊酚组(采用丙泊酚麻醉),各为45例。比较两组血流动力学[心率(HR)、平均动脉压(MAP)]、应激反应[皮质醇(Cor)、促肾上腺皮质激素(ACTH)]、T淋巴细胞亚群[CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)]变化情况,并观察两组麻醉期间不良反应发生情况。结果:右美托咪定组麻醉诱导后10 min(T1)~手术结束时(T4)时间点MAP低于丙泊酚组,HR高于丙泊酚组(P0.05)。结论:与丙泊酚麻醉相比,右美托咪定可更好地稳定肝脏肿块切除术患儿血流动力学,减轻应激反应,同时还可减轻免疫抑制。

关键词：右美托咪定丙泊酚肝脏肿块肝脏手术血流动力学应激反应免疫功能

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Regulating electrochemical performances of lithium battery by external physical field

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Rare Metals 2024年第6期43卷 2391-2417页

作者： Shi-kang Wang Shuai Wu Yi-Cheng Song Hassanien Gomaa Cui-hua An Qi-Bo Deng Ning hu School of Mechanical Engineering School of Materials Science and EngineeringHebei University of TechnologyTianjin 300401China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai 200444China Department of Chemistry Faculty of ScienceAl-Azhar UniversityAssiut 71524Egypt Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehicles Tianjin 300401China State Key Laboratory of Reliability and Intelligence Electrical Equipment Key Laboratory of Advanced Intelligent Protective Equipment TechnologyMinistry of EducationHebei University of TechnologyTianjin 300130China

Lithium batteries have always played a key role in the field of new energy ***,non-controllable lithium dendrites and volume dilatation of metallic lithium in batteries with lithium metal as anodes have limited their ***,a large number of studies have shown that the electrochemical performances of lithium batteries can be enhanced through the regulation of external physical ***,it significantly hinders the growth of lithium dendrites and promoting the reaction *** review summarizes recent innovations in the investigation of various physical fields of lithium *** application of magnetic field in the synthesis of lithium battery electrode materials is *** influence factors and regulation mechanism of various physical fields on the electrochemical performance of lithium batteries are reviewed *** addition,the current research status and existing challenges,along with future directions for the evolution of lithium batteries,are minutely discussed and *** strategies for the further evolution of lithium batteries have also been provided.

关键词： Lithium battery External field assist Reaction kinetics Lithium dendrite

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In situ meso-tetra(4-carboxyphenyl)porphyrin ligand substitution in Hf-MOF for enhanced catalytic activity and stability in photoredox reactions

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Rare Metals 2024年第6期43卷 2682-2694页

作者： Jie hu Hong-Xin Lao Xiu-Wu Xu Wei-kang Wang Le-Le Wang Qin-Qin Liu School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China College of Chemistry and Materials Engineering Research Center of Carbon NeutralityAnhui Normal UniversityWuhu 241002China Fujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants Putian UniversityPutian 351100China

Though there are numerous intrinsic merits of metal-organic frameworks(MOFs),low charge separation efficiency has imposed heavy restrictions on their photocatalytic ***,in situ porphyrin ligand substitution,as a strategy for improving the charge separation efficiency and increasing the amounts of active sites,has been designed and realized in a Hf-biphenyl dicarboxylic acid(BPDC)***,a size and geometry matched meso-tetra(4-carboxyphenyl)porphyrin(TCPP)ligand was selected and doped into Hf-BPDC MOF by forming coordinating bonds with Hf centers,forming dualligand Hf-BPDC-TCPP *** resultant Hf-BPDC-TCPP MOF showed significantly improved activity and chemical stability in the photocatalytic H_(2)generation(261μmol·g^(-1)·h^(-1))and tetracycline(TC)degradation reactions(95.8%),which was 48 and 1.47 folds higher than that of the Hf-BPDC *** and electrochemical studies revealed that the introduction of porphyrin ligand could generate a stronger internal electric field for boosting the charge separation and transfer,increase the specific surface area for providing more active sites,and narrow the band gap to enhance the visible light *** in situ ligand substitution method provides a promising approach to build a tunable platform for constructing high-performance MOF photocatalysts.

关键词： Ligand substitution Metal organic frameworks Meso-tetra(4-carboxyphenyl)porphyrin Hydrogen evolution reaction Tetracycline degradation

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基于骨髓间充质干细胞焦亡探讨中医药防治激素性股骨头坏死的研究进展

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风湿病与关节炎 2024年第4期13卷 62-66页

作者：张勇杰曹林忠尚征亚胡康一杨小瑞甘肃中医药大学甘肃兰州730000 甘肃中医药大学附属医院甘肃兰州730000

激素性股骨头坏死是骨科临床常见病,其发病机制较为复杂,至今尚未阐明,近年研究发现由NLRP3/Caspase-1/GSDMD信号通路介导的骨髓间充质干细胞焦亡与激素性股骨头坏死的发生密切相关,而中医药对NLRP3/Caspase-1/GSDMD信号通路有着良好的... 详细信息

激素性股骨头坏死是骨科临床常见病,其发病机制较为复杂,至今尚未阐明,近年研究发现由NLRP3/Caspase-1/GSDMD信号通路介导的骨髓间充质干细胞焦亡与激素性股骨头坏死的发生密切相关,而中医药对NLRP3/Caspase-1/GSDMD信号通路有着良好的调节作用。基于此,对NLRP3/Caspase-1/GSDMD信号通路介导BMSCs焦亡与激素性股骨头坏死发病的相关性,以及中医药对NLRP3/Caspase-1/GSDMD信号通路的调控机制进行综述,以期为中医药防治激素性股骨头坏死提供参考。

关键词：激素性股骨头坏死骨髓间充质干细胞焦亡 NLRP3/Caspase-1/GSDMD信号通路中医药研究进展综述

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基于自适应卡尔曼滤波残差分析的雷击故障定位

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电力系统保护与控制 2020年第23期48卷 30-39页

作者：席燕辉胡康王康长沙理工大学电气与信息工程学院湖南长沙410114

雷击是引起电力传输和配电系统中瞬态、故障和停电的重要原因。为提高在含噪环境下雷击故障点检测的准确性与可靠性,提出了一种基于最大似然(KF-ML)卡尔曼滤波残差分析的雷击故障定位方法。首先通过比较短路故障电流与雷击故障电流之间... 详细信息

雷击是引起电力传输和配电系统中瞬态、故障和停电的重要原因。为提高在含噪环境下雷击故障点检测的准确性与可靠性,提出了一种基于最大似然(KF-ML)卡尔曼滤波残差分析的雷击故障定位方法。首先通过比较短路故障电流与雷击故障电流之间的瞬态特性差异来区分出短路故障和雷击故障。当行波波头到达时,估计的滤波残差呈现出尖锐的奇异性。通过比较初始行波到达两端的时间,确定雷击侧和故障侧,进一步根据双端测距法可以计算出雷击点距离。同时通过初始雷击行波到达故障侧的时间和来自故障点的反射波时间来获得故障点距离。通过模拟雷电流的仿真分析表明了该方法能有效检测到行波波头,并将其应用在不同条件下的雷击定位和故障定位测试中,且灵敏度高。

关键词：瞬态电流卡尔曼滤波最大似然滤波残差奇异性

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Synthesis,characterization and catalytic performance of Mo based metal-organic frameworks in the epoxidation of propylene by cumene hydroperoxide

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Chinese Chemical Letters 2017年第5期28卷 1057-1061页

作者： Xiao-Lei Ni Jing Liu Ying-Ya Liu Karen Leus Hannes Depauw An-Jie Wang Pascal Van Der Voort Jian Zhang Yong-kang hu State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116024China Department of Inorganic and Physical Chemistry COMOC-Centerfor Ordered MaterialsOrganornetallics and CatalysisGhent UniversityKrijgslaan 281-53 9000 GhentBelgium Liaoning Key Laboratory of Petrochemical Technology and Equipments Dalian 116024China Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China

Two types of Mo containing metal-organic frameworks,denoted as Mo@COMOC-4 and PMA@MIL-101（Cr）,were synthesized respectively by a post-synthetic modification and a ship-in-bottle *** catalytic performance of both compounds in the epoxidation of propylene using cumene hydroperoxide（CHP） as oxidant was compared with MoO3@SiO2.A higher conversion（46.2%） and efficiency（87.4%） of CHP was observed for Mo@COMOC-4,whereas the heteropoly acids supported MIL-101 resulted in the decomposition of CHP due to its strong acidic *** tests demonstrated that Mo@COMOC-4 could be reused for multiple runs without significant loss in both activity and stability.

关键词： Metal-organic framework Molybdenum Cumene hydroperoxide Propylene epoxidation

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Effects of Acupotomy on Immobilization-Induced Gastrocnemius Contracture and Fibrosis in Rats via Wnt/β-Catenin Signaling

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Chinese Journal of Integrative Medicine 2024年第7期30卷 633-642页

作者： hu Rui PAN Jun-kang LI Jia-hui ZHANG Han LI Shao-rong ZHANG Yi School of Acupuncture-Moxibustion and Tuina Beijing University of Chinese MedicineBeijing100029China Acupuncture Department Kunming Municipal Hospital of Traditional Chinese MedicineKunming650500China

Objective To determine whether acupotomy ameliorates immobilization-induced muscle contracture and fibrosis via Wnt/β-catenin signaling *** Thirty Wistar rats were randomly divided into 5 groups(n=6)by a random number table,including control,immobilization,passive stretching,acupotomy,and acupotomy 3 weeks(3-w)*** rat model of gastrocnemius contracture was established by immobilizing the right hind limb in plantar flexion for 4 *** in the passive stretching group received passive stretching at gastrocnemius,a daily series of 10 repetitions for 30 s each at 30-s intervals for 10 consecutive *** in the acupotomy and acupotomy 3-w groups received acupotomy once and combined with passive stretching at gastrocnemius a daily series of 10 repetitions for 30 s each at 30-s intervals for 10 consecutive ***,rats in the acupotomy 3-w group were allowed to walk freely for 3 weeks after 10-day *** treatment,range of motion(ROM),gait analysis[i.e.,paw area,stance/swing and maximum ratio of paw area to paw area duration(Max dA/dT)],gastrocnemius wet weight and the ratio of muscle wet weight to body weight(MWW/BW)were *** morphometric and muscle fiber cross-sectional area(CSA)were assessed by hematoxylin-eosin ***-related mRNA expressions(i.e.,Wnt 1,β-catenin,axin-2,α-smooth muscle actin,fibronectin,and types I and III collagen)were measured using real-time quantitative polymerase chain *** 1,β-catenin and fibronectin concentrations were measured by enzyme-linked immunosorbent *** I and III collagen in the perimysium and endomysium were analyzed using *** Compared with the control group,ROM,gait function,muscle weight,MWW/BW and CSA were significantly decreased in the immobilization group(all P<0.01),while protein levels of types I and III collagen,Wnt 1,β-catenin,fibronectin and mRNA levels of fibrosis-related genes were obviously increased(all P<0.01).Tr

关键词： acupotomy immobilization muscle contracture muscle fibrosis Wnt/β-catenin signaling

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黄土深基坑内支撑体系分析及优化

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资源信息与工程 2024年第4期39卷 90-94页

作者：周进福李小娃李其俭柴亮赵进宏蒲扬康虎中铁三局集团有限公司运输工程分公司山西晋中030600 中国铁路兰州局集团有限公司兰州工程建设指挥部甘肃兰州730000 甘肃铁投地方铁路有限公司甘肃兰州730000

基坑工程是城市建设中的重要部分。在基坑开挖过程中,地面土体受到破坏和变形,对围护结构产生一定的负荷作用,因此需要采取措施来增加围护结构的稳定性。本文以某隧道工程明挖段为例,对土体和钢支撑、围护桩等各部分之间的相互作用建立... 详细信息

基坑工程是城市建设中的重要部分。在基坑开挖过程中,地面土体受到破坏和变形,对围护结构产生一定的负荷作用,因此需要采取措施来增加围护结构的稳定性。本文以某隧道工程明挖段为例,对土体和钢支撑、围护桩等各部分之间的相互作用建立有限元模型,结合现场实测和数值模拟,研究钢支撑架设位置对围护桩水平位移的影响,并提出相应的优化设计方案,可为相关研究提供参考。

关键词：围护结构数值模拟深基坑现场监测

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Streamflow abrupt change and the driving factors in glacierized basins of Tarim Basin,Northwest China

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Advances in Climate Change Research 2024年第1期15卷 75-89页

作者： Cheng-De YANG Min XU Shi-Chang kang Cong-Sheng FU Wei ZHANG Di-Di hu State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210000China

A climate transition towards warm-wet conditions in Northwest China has drawn much *** continuous climate change and universal glacier degradation,increasing water-related hazards and vulnerability have become one of the important problems facing the Tarim ***,the impacts of the climate transition on streamflow abrupt change and extreme hydrological events were less discussed,especially in glacial *** the present study,the discharge datasets in four glacial basins of Tarim Basin from 1979 to 2018 were constructed using the GRU-GSWAT+model *** differences in streamflow characteristics,the shift of hydrological extreme pattern,and potential changes of the controlling factors before and after the abrupt changes were *** results indicated that the abrupt change point(ACP)in streamflow occurred in 2000 in the Qarqan River Basin,2002 in the Weigan River Basin,and 1994 in the Aksu River Basin and the Yarkant River Basin.A general decrease in streamflow before the ACP has shifted to a notable upward trend in the Qarqan River Basin and the Aksu River Basin,while minor upward fluctuations were observed in other ***,the hydrological characteristics in extreme events vary dramatically before and after the ACPs,characterized by a pronouncing shift from drought-dominant pattern to wet events dominated *** driven climate factors have been altered after the ACPs with notable spatial heterogeneity,in which temperature remained as the dominant role in meltwater-dominated basins while the influence of precipitation has increased after the ACPs,whereas the sensitivity of temperature on streamflow change has been enhanced in basins dominated by precipitation such as the Qarqan River *** to the evident warming-wetting trend and glacier compensation effect,both the inter-annual and intra-annual streamflow fluctuations can be efficiently smoothed in basins with a high glacier area ratio(GAR).These findings provide a

关键词： Abrupt change Streamflow Hybrid model Tarim Basin Glacier

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