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Efficient stabilization of dredged sludge with high water content using an improved bio-carbonation of reactive magnesia cement method

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第9期16卷 3760-3771页

作者： Rui wang Chaosheng Tang Xiaohua Pan Dianlong wang zhihao Dong Xiying Zhang Xiancai Lu School of Earth Sciences and Engineering Nanjing UniversityNanjing210023China Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lake Qinghai Institute of Salt LakesChinese Academy of SciencesXining810008China

This study proposed an improved bio-carbonation of reactive magnesia cement(RMC)method for dredged sludge stabilization using the urea pre-hydrolysis *** on unconfined compression strength(UCS),pickling-drainage,and scanning electron microscopy(SEM)tests,the effects of prehydrolysis duration(T),urease activity(UA)and curing age(CA)on the mechanical properties and microstructural characteristics of bio-carbonized samples were systematically investigated and *** results demonstrated that the proposed method could significantly enhance urea hydrolysis and RMC bio-carbonation to achieve efficient stabilization of dredged sludge with 80%high water content.A significant strength increment of up to about 1063.36 kPa was obtained for the bio-carbonized samples after just 7 d of curing,which was 2.64 times higher than that of the 28-day cured ordinary Portland cement-reinforced *** elevated T and UA could notably increase urea utilization ratio and carbonate ion yield,but the resulting surge in supersaturation also affected the precipitation patterns of hydrated magnesia carbonates(HMCs),which weakened the cementation effect of HMCs on soil particles and further inhibited strength enhancement of bio-carbonized *** optimum formula was determined to be the case of T?24 h and UA?10 U/mL for dredged sludge stabilization.A 7-day CA was enough for bio-carbonized samples to obtain stable strength,albeit slightly affected by *** benefits of high efficiency and water stability presented the potential of this method in achieving dredged sludge stabilization and resource *** investigation provides informative ideas and valuable insights on implementing advanced bio-geotechnical techniques to achieve efficient stabilization of soft soil,such as dredged sludge.

关键词： Reactive magnesia cement(RMC)biocarbonation Urea pre-hydrolysis Dredged sludge Efficient stabilization Unconfined compressive strength Microbially induced carbonate precipitation(MICP)

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A rice exocyst subunit gene SEC3A is required for anther dehiscence

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The Crop Journal 2024年第3期12卷 938-943页

作者： Ranran Tu Hong wang zhihao Sun Qinwen Zou Jiajun Wu Duo Wu Nan wang Guanghua He Rice Research Institute Key Laboratory of Application and Safety Control of Genetically Modified CropsAcademy of Agricultural SciencesSouthwest UniversityChongqing 400715China

Anther dehiscence controls optimal interaction between pollen and stigma,thereby determining the successful sexual *** regulators or mechanisms of this process remain ***,two CRISPR/Cas9 mutants of a rice exocyst subunit gene SEC3A,sec3a-1 and sec3a-2,showed anther indehiscence at anthesis and male sterility at *** viability and germination in the mutants were partly defective,whereas their female gametes undergone a normal *** or self-pollinated seeds could be produced by artificial pollination,suggesting potential use of a weak sec3a mutant as a female line during hybrid ***3A is widely expressed in various tissues,including anther *** results showed an excessive IAA accumulation and no endothecium lignification in sec3a-1/2 *** findings suggest that SEC3A appears to regulate anther dehiscence by modulating auxin signaling,providing insights into regulation of anther dehiscence and function of exocyst in plants.

关键词： Rice Male sterility Anther dehiscence Exocyst SEC3A

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锁骨下动脉狭窄合并指动脉栓塞1例并文献复习

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国际医药卫生导报 2024年第5期30卷 848-852页

作者：王志浩邢国飞邹秀兰侯红军隋海明青岛大学附属威海市中心医院血管介入外科威海264400 青岛大学附属威海市中心医院骨外科威海264400

本文主要对2022年11月威海市中心医院收治的1例锁骨下动脉狭窄合并指动脉栓塞的诊疗过程进行分析,探讨锁骨下动脉狭窄、指动脉栓塞处理时机及方法、血管危象处理方法。从锁骨下动脉狭窄病因、处理,指动脉栓塞药物治疗、手术治疗等方面... 详细信息

本文主要对2022年11月威海市中心医院收治的1例锁骨下动脉狭窄合并指动脉栓塞的诊疗过程进行分析,探讨锁骨下动脉狭窄、指动脉栓塞处理时机及方法、血管危象处理方法。从锁骨下动脉狭窄病因、处理,指动脉栓塞药物治疗、手术治疗等方面进行综述,认为当出现锁骨下动脉闭塞合并指动脉栓塞时,应该尽早针对病因锁骨下动脉闭塞或狭窄进行支架植入治疗;若仍然存在肢体缺血,建议早期探查血管;对于有吸烟史、缺血时间较长的患者,尽早采用自体静脉桥接,从而提高指体存活率。

关键词：锁骨下动脉狭窄指动脉栓塞手术治疗文献复习

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A Detection Method of WLAN Security Mechanisms Based on MAC Frame Resolution

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Wuhan University Journal of Natural Sciences 2017年第2期22卷 93-102页

作者： LI June YUAN Kai ZHOU Liang HAN Lifang LI Ling wang zhihao LIU Yinbin HUANG Wenbin Key Laboratory of Aerospace Information Security and Trusted Computing of Ministry of Education Wuhan 430072HubeiChina School of Computer Wuhan UniversityWuhan 430072HubeiChina School of Electrical Engineering Wuhan UniversityWuhan 430072HubeiChina China Electric Power Research Institute Beijing 100192China

Security mechanism detection is not only an important content of vulnerabilities evaluation but also the foundation of key strength test for wireless local area network （WLAN）. This paper analyzes the specifications of WLAN security mechanisms and points out the defects in design of security mechanisms detection algorithm based on the standards. By capturing and analyzing a large number of Beacon frames from different vendor＇s access points （APs）, we summarize the relevant fields and information elements in a Beacon frame, and present their values or status when an AP is set to every specific security mechanism. A detection algorithm of WLAN security mechanisms is proposed based on the experimental study result and the pseudo code of a reference implementation for the algorithm is designed. The validity of the algorithm is illustrated by examples, which shows it can detect every WLAN security mechanism accurately.

关键词： IEEE 802.11 security mechanism detection algorithm MAC frame resolution vulnerabilities evaluation

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高密度电法在汛期堤防渗漏隐患探测中的应用

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河北水利电力学院学报 2024年第1期34卷 29-33页

作者：刘栋臣汤克轩刘金鹏李国瑞王志豪中水北方勘测设计研究有限责任公司天津市300222

汛期高水位、高渗透压力下,会造成堤防渗漏缺陷扩大或隐患加剧,快速、准确地开展堤防渗漏隐患应急排查,是指导科学防汛、保障安全度汛的重要举措。针对管涌、散浸、穿堤建筑物等渗漏缺陷及隐患,开展了高密度电法的场地试验,得到汛期堤... 详细信息

汛期高水位、高渗透压力下,会造成堤防渗漏缺陷扩大或隐患加剧,快速、准确地开展堤防渗漏隐患应急排查,是指导科学防汛、保障安全度汛的重要举措。针对管涌、散浸、穿堤建筑物等渗漏缺陷及隐患,开展了高密度电法的场地试验,得到汛期堤岸的电性结构,通过比对试验,得到不同渗漏缺陷与无显著缺陷堤岸的电性差异,以此为基准,采用高密度电法对子牙河右堤天津静海段特别是子牙河汇入独流减河段进行隐患排查,划分了渗漏隐患区和潜在风险区,为保障海河流域“23·7”特大洪水期间堤防安全提供了重要技术支撑。

关键词：渗漏探测应急抢险堤岸子牙河高密度电法

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∼2.5 nm pores in carbon-based cathode promise better zinc-iodine batteries

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Chinese Chemical Letters 2024年第5期35卷 471-476页

作者： Yajun Hou Chuanzheng Zhu Qiang wang Xiaomeng Zhao Kun Luo Zongshuai Gong zhihao Yuan School of Materials Science and Engineering Tianjin Key Laboratory of Photoelectric Materials&DevicesTianjin University of TechnologyTianjin 300384China

The relationship mechanism between the material pore structures and cathodic iodine chemistry plays a vital role in efficient Zn-I_(2) batteries,but is unclear,retarding further *** work innovatively indicates a great contribution of∼2.5nm pore structure of nanocarbons to efficient iodine adsorption,rapid I^(−)↔I_(2) conversion,and polyiodide inhibition,via scrupulously designing catalysts with controllable pore sizes *** I_(2)-loading within the designed nitrogen-doped nanocarbons can reach up to as high as 60.8 wt%.The batteries based on the cathode deliver impressive performances with a large capacity of 178.8 mAh/g and long-term cycling stability more than 4000 h at 5.0 ***,these is no polyiodide such as I_(3)−and I_(5)−detected during the charge-discharge processes from comprehensive electrochemical cyclic voltammetry,X-ray photoelectron spectroscopy,and Raman *** work provides a novel knowledge-guided concept for rational pore design,promising better Zn-I_(2) batteries,which is also hoped to benefit other advanced energy technologies,such as Li-S,Li-ion,and Al-I_(2) batteries.

关键词： Zinc-iodine batteries Structure-performance relationship Iodine conversion chemistry Cathode materials Porous carbon

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Enhanced photocatalytic nitrogen fixation performance via in situ constructing BiO_(2-x)/NaNbO_(3) heterojunction

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Chinese Journal of Chemical Engineering 2024年第5期69卷 92-100页

作者： Jiayu Zhang zhihao Zeng Lin Yue Chunran Zhao Xin Hu Leihong Zhao Xiuwen wang Yiming He Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary School of Chemistry and Chemistry EngineeringQiqihar UniversityQiqihar 161006China Department of Materials Science and Engineering Zhejiang Normal UniversityJinhua 321004China

The fabrication of heterojunction catalysts is an effective strategy to enhance charge separation efficiency,thereby boosting the performance of *** this study,BiO_(2-x)nanosheets were synthesized through a hydrothermal process and loaded onto NaNbO_(3) microcube to construct a series of BiO_(2-x)/NaNbO_(3) heterojunctions for photocatalytic N_(2) *** indicated that 2.5%BiO_(2-x)/NaNbO_(3) had the highest photocatalytic *** NH_(3) production rate under simulated solar light reached 406.4μmol·L^(-1)·g^(-1)·h^(-1),which reaches 2.6 and 3.8 times that of NaNbO_(3) and BiO_(2-x),***_(2-x)nanosheets primarily act as electron trappers to enhance the separation efficiency of charge *** strong interaction between BiO_(2-x)and NaNbO_(3) facilitates the electron migration between ***,the abundant oxygen vacancies in BiO_(2-x)nanosheets may facilitate the adsorption and activation of N_(2),which may be another possible reason of the high photocatalytic activity of the BiO_(2-x)/NaNbO_(3).This study may offer new insights for the development of semiconductor materials in photocatalytic nitrogen fixation.

关键词： Catalyst Solar energy Hydrothermal BiO_(2-x)/NaNbO_(3) Photocatalytic N_(2)-fixation

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Probiotics administration alleviates cognitive impairment and circadian rhythm disturbance induced by sleep deprivation

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Food Science and Human Wellness 2024年第4期13卷 1951-1961页

作者： Peijun Tian Yunfei Hou Zheng wang Jiaona Jiang Xin Qian zhihao Qu Jianxin Zhao Gang wang Wei Chen State Key Laboratory of Food Science and Resources Jiangnan UniversityWuxi 214122China School of Food Science and Technology Jiangnan UniversityWuxi 214122China National Engineering Research Center for Functional Food Jiangnan UniversityWuxi 214122China Institute of Food Biotechnology(Yangzhou) Jiangnan UniversityYangzhou 225004China

Gut microbiome is indispensable for maintaining normal brain ***,gut microbiota plays a causal role in sleep deprivation(SD)-induced cognitive *** this study,neurobehavioral effects of the Bifidobacterium breve strain(CCFM1025)were assessed in sleep-deprived ***1025 improved the body weight and food and water intake of the *** also alleviated SD-induced cognitive behavioural abnormalities(in the novel object recognition test),but did not show beneficial effects on mood-and spatial memory-related ***1025 significantly altered the gut microbial composition and genome *** microbial metabolites that may regulate sleep function were also identified,such as isovaleric acid andγ-aminobutyric acid in the gut and purine metabolites in the *** metabolites may participate in gutbrain communication by acting on the striatal melatonin system,for example to increase melatonin levels,and by regulating the expression of circadian clock genes such as those encoding the adenosine A2A receptor and period circadian regulator ***,administration of probiotics alleviated cognitive impairment and circadian rhythm disturbance induced by SD via modulation of gut microbiome and its *** findings may help guide the treatment of insomnia or other sleep disorders via dietary strategies.

关键词： Bifidobacterium Sleep Circadian rhythm Purine Gut microbiome

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Preparation and Properties of Macroporous Silicon Nitride Ceramics by Gelcasting and Carbonthermal Reaction

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Journal of Materials Science & Technology 2005年第6期21卷 894-898页

作者： Wen ZHANG, Hongjie wang+ and zhihao JIN State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an JiaotongUniversity, Xi’an 710049, China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University Xi'an 710049 China

Macroporous silicon nitride （Si3N4） ceramics with high strength, uniform structure and relatively high porosity were obtained by gelcasting and carbonthermal reaction in a two-step sintering technique. Microstructure and composition were investigated by scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray diffraction （XRD）. Open porosity, pore size distribution and basic mechanical performance were measured by Archimedes method, mercury intrusion porosimetry and three-point bending methods, respectively. SEM and TEM results revealed that pores were formed by elongated β-Si3N4. SADP measurement proved the formation of SiC particles. The SiC granules were beneficial for the formation of high ratio elongated β-Si3N4, and at proper amount, they also acted as reinforcement phase. Thermodynamic analysis indicated that the mechanisms of the reactions were mainly associated with liquid-solid reaction and gas-liquid reaction.

关键词： Ceramics Silicon nitride Silicon carbide X-ray diffraction

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基于复合石墨双极板的亲疏水特性研究

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船电技术 2024年第5期44卷 15-18页

作者：王志豪余圆吴昊陈佳俊魏亚杰花仕洋武汉船用电力推进装置研究所武汉430064 武汉氢能与燃料电池产业技术研究院有限公司武汉430000

为了更好的管理燃料电池内部的水平衡,对复合石墨双极板的亲疏水特性进行研究。首先,对双极板进行表面处理,改变双极板表面的接触角;其次测量了双极板与碳纸间的接触电阻,最后装配了燃料电池堆并测量不同亲疏水特性双极板的电性能。实... 详细信息

为了更好的管理燃料电池内部的水平衡,对复合石墨双极板的亲疏水特性进行研究。首先,对双极板进行表面处理,改变双极板表面的接触角;其次测量了双极板与碳纸间的接触电阻,最后装配了燃料电池堆并测量不同亲疏水特性双极板的电性能。实验结果表明,通过亲水处理减小复合石墨双极板表面的接触角有利于增强燃料电池堆性能,提升电池的排水能力。

关键词：燃料电池复合石墨双极板水管理

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