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In situ formed Mg(BH_(4))_(2) for improving hydrolysis properties of MgH_(2)

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Journal of Magnesium and Alloys 2024年第3期12卷 1204-1214页

作者： Yongyang Zhu Mili Liu liming Zeng Yin Wang Daifeng Wu Rui Li Qing zhou Renheng Tang Fangming Xiao Institute of Resources Utilization and Rare Earth Development Guangdong Provincial Key Laboratory of Rare Earth Development and ApplicationGuangdong Academy of SciencesGuangzhou 510650China School of Materials Science and Engineering Guangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhou 510641China

The hydrolysis of MgH_(2) delivers high hydrogen capacity(15.2 wt%),which is very attractive for real-time hydrogen ***,the formation of a surface passivation Mg(OH)_(2) layer and the large excess of H_(2)O required to ensure complete hydrolysis are two key challenges for the MgH_(2) hydrolysis ***,a low-cost method is reported to synthesize MgH_(2)@Mg(BH_(4))_(2) composite via ball-milling MgH_(2) with cheap and widely available B_(2)O_(3)(or B(OH)_(3)).By adding small amounts of B_(2)O_(3),the in-situ formed Mg(BH_(4))_(2) could significantly promote the hydrolysis of MgH_(2).In particular,the MgH_(2)–10 wt%B_(2)O_(3) composite releases 1330.7 mL·g^(−1) H_(2)(close to 80%theoretical hydrogen generation H_(2))in H_(2)O and 1520.4 mL·g^(−1) H_(2)(about 95%)in 0.5 M MgCl_(2) in 60 min at 26℃ with hydrolysis rate of 736.9 mL·g^(−1)·min^(−1) and 960.9 mL·g^(−1)·min^(−1) H_(2) during the first minute of the hydrolysis,*** addition,the MgCl_(2) solution allows repeated use by filtering and exhibits high cycle stability(20 cycles),therefore leading to much reduced capacity loss caused by the excess H_(2)*** show that by introducing B_(2)O_(3) and recycling the 0.5 M MgCl_(2) solution,the system hydrogen capacity can approach 5.9 wt%,providing a promising hydrogen generation scheme to supply hydrogen to the fuel cells.

关键词： Hydrolysis MgH_(2) Mg(BH_(4))_(2) Hydrogen generation B_(2)O_(3) MgCl_(2)

Bacterial nanocellulose assembly into super-strong and humidity-responsive macrofibers

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Journal of Bioresources and Bioproducts 2024年第3期9卷 369-378页

作者： Yadong Zhao Zheng Yang Rusen zhou Bin Zheng Meiling Chen Fei Liu Wenhua Miao Renwu zhou Patrick Cullen Zhenhai Xia liming Dai Kostya(Ken)Ostrikov School of Food and Pharmacy Zhejiang Ocean UniversityZhoushan 316022China State Key Laboratory of Electrical Insulation and Power Equipment Center for Plasma BiomedicineXi'an Jiaotong UniversityXi'an 710049China School of Chemical and Biomolecular Engineering University of SydneySydney 2006Australia School of Chemistry and Physics and Centre for Materials Science Queensland University of TechnologyBrisbane 4000Australia Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Australian Carbon Materials Centre(A-CMC) School of Chemical EngineeringUniversity of New South WalesSydneyNew South Wales 2052Australia

Cellulose macrofibers (MFs) are gaining increasing interest as natural and biodegradable alternatives to fossil-derived polymers for both structural and functional applications. However, simultaneously achieving their exceptional mechanical performance and desired functionality is challenging and requires complex processing. Here, we reported a one-step approach using a tension-assisted twisting (TAT) technique for MF fabrication from bacterial cellulose (BC). The TAT stretches and aligns BC nanofibers pre-arranged in hydrogel tubes to form MFs with compactly assembled structures and enhanced hydrogen bonding among neighboring nanofibers. The as-prepared BC MFs exhibited a very high tensile strength of 1 057 MPa and exceptional lifting capacity (over 340 000 when normalized by their own weight). Moreover, due to the volume expansion of BC nanofibers upon water exposure, BC MFs quickly harvested energy from environmental moisture to untwist the bundled networks, thus generating a torsional spinning with a peak rotation speed of 884 r/(min·m). The demonstrated rapid and intense actuation response makes the MFs ideal candidates for diverse humidity-response-based applications beyond advanced actuators, remote rain indicators, intelligent switches, and smart curtains.

关键词： Nanocellulose assembly Cellulose macrofibers Super-strong Humidity-responsive actuation Moisture Fast actuation

Hotspots of the sensitivity of the land surface hydrological cycle to climate change

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Chinese Science Bulletin 2013年第28期58卷 3682-3688页

作者： HUA WenJian CHEN HaiShan ZHU SiGuang SUN ShanLei YU Miao zhou liming Key Laboratory of Meteorological Disaster Ministry of EducationNanjing University of Information Science & Technology College of Global Change and Earth System Science Beijing Normal University Applied Hydrometeorological Research Institute Nanjing University of Information Science & Technology Department of Atmospheric and Environmental Sciences University at AlbanyState University of New York

Due to the shortage of the global observational data of the terrestrial hydrological variables,the understanding of how surface hydrological processes respond to climate change is still *** this study,the Community Land Model(CLM4.0)with high resolution atmospheric forcing data is selected to simulate the global surface hydrological quantities during the period 1948–2006and to investigate the spatial features of these quantities in response to climate change at the regional *** sensitivities of evaporation and runoff with respect to the dominant climate change factors(*** and precipitation)derived from the concept of climate elasticity are *** show that evaporation has a declining trend with a rate of 0.7 mm per decade,while runoff shows a weak increasing trend of 0.15 mm per decade over the global land *** of the hotspots in the hydrological cycle indicate that the spatial distributions for evaporation and runoff are similar over many areas in central Asia,Australia,and southern South America,but differ largely in high *** is also found that,the evaporation hotspots in arid regions are mainly associated with the changes in *** sensitive analysis suggests that the hydrological quantities show a rather complicated spatial dependency of response of the water cycle to the different climate factors(temperature and precipitation).

关键词：敏感性分析气候变化水文循环陆地表面空间特征高纬度地区蒸发率水文变量

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A Calcium-Dependent Protein Kinase Interactswith and Activates A Calcium Channel toRequlate Pollen Tube Growth

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Molecular Plant 2014年第2期7卷 369-376页

作者： liming zhou Wenzhi Lan Yuanqing Jiang Wei Fang Sheng Luan Department of Plant and Microbial Biology University of California Berkeley CA 94720 USA College of Life Sciences Hebei United University Tangshan Hebei 063000 China NJU–NJFU Joint Institute for Plant Molecular Biology School of Life Sciences Nanjing University Nanjing 210093 China

ABSTRACT Calcium, as a ubiquitous second messenger, plays essential roles in tip-growing cells, such as animal neu-rons, plant pollen tubes, and root hairs. However, little is known concerning the regulatory mechanisms that code anddecode Ca2＋ signals in plants. The evidence presented here indicates that a calcium-dependent protein kinase, CPK32,controls polar growth of pollen tubes. Overexpression of CPK32 disrupted the polar growth along with excessive Ca2＋accumulation in the tip. A search of downstream effector molecules for CPK32 led to identification of a cyclic nucleotide-gated channel, CNGC18, as an interacting partner for CPK32. Co-expression of CPK32 and CNGC18 resulted in activationof CNGC18 in Xenopus oocytes where expression of CNGC18 alone did not exhibit significant calcium channel *** of CNGC18 produced a growth arrest phenotype coupled with accumulation of calcium in the tip, simi-lar to that induced by CPK32 overexpression. Co-expression of CPK32 and CNGC18 had a synergistic effect leading tomore severe depolarization of pollen tube growth. These results provide a potential feed-forward mechanism in whichcalcium-activated CPK32 activates CNGC18, further promoting calcium entry during the elevation phase of Ca2＋ oscilla-tions in the polar growth of pollen tubes.

关键词： pollen tubes calcium-dependent protein kinase cyclic nucleotide-gated channel Ca2+ oscillations

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基于保护校验数据的继电保护统计分析系统

电工技术 2024年第13期 150-153页

作者：孙运兵许勇斌屈天龙汪胜鑫段贤稳黄勇秦伟锋周利明大亚湾核电运营管理有限责任公司广东深圳518124 中广核核电运营有限公司广东深圳518124 北京博电国华新能源科技开发有限公司北京100176

为了解决电力系统中继电保护设备的统计效率问题,设计基于保护校验数据的继电保护统计分析系统。硬件方面,设计信息存储芯片、继电器驱动电路和继电保护示波器;软件方面,基于保护校验数据实现对继电保护信息数据的采样,然后在清洗数据... 详细信息

为了解决电力系统中继电保护设备的统计效率问题,设计基于保护校验数据的继电保护统计分析系统。硬件方面,设计信息存储芯片、继电器驱动电路和继电保护示波器;软件方面,基于保护校验数据实现对继电保护信息数据的采样,然后在清洗数据的基础上,设计实现继电保护统计分析流程。系统测试结果表明,该系统性能较优秀,时间开销较少,能满足继电保护统计分析需求。

关键词：保护校验数据继电保护统计分析系统设计

肝门部胆管癌手术预后的危险因素及预后模型的研究进展

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国际外科学杂志 2024年第4期51卷 278-282页

作者：方禹竣段键卿哲黄慧聪吴文琪周立明何金兰昆明医科大学第一附属医院呈贡院区普通外科昆明650599

根治性切除手术是肝门部胆管癌获得治愈的唯一有效手段,但却有着极高的术后死亡率,术后复发率高,所以国内外的学者构建了基于统计学的评估方法来预测患者术后的生存期及并发症发生,例如列线图、评分系统等预后模型。基于这些评估方法的... 详细信息

根治性切除手术是肝门部胆管癌获得治愈的唯一有效手段,但却有着极高的术后死亡率,术后复发率高,所以国内外的学者构建了基于统计学的评估方法来预测患者术后的生存期及并发症发生,例如列线图、评分系统等预后模型。基于这些评估方法的应用,临床医师能够更好地筛选能从手术中获益的患者,指导对复杂患者的最佳临床治疗方案的选择,通过采用替代治疗方案或者减少术前危险因素来降低术后风险,从而提高患者的生存率。本文对肝门部胆管癌手术预后相关的危险因素、预后模型进行综述,以期为临床工作者预测患者手术预后提供参考。

关键词：肝门部胆管癌预后危险因素列线图机器学习

A non-viral gene therapy for melanoma by staphylococcal enterotoxin A

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Chinese Chemical Letters 2024年第5期35卷 325-329页

作者： Ling Yang Min Ren Jie Wang liming He Shanshan Wu Shuai Yang Wei Zhao Hao Cheng Xiaoming zhou Maling Gou State Key Laboratory of Biotherapy and Cancer Center West China HospitalSichuan UniversityChengdu 610041China Department of Ophthalmology West China HospitalSichuan UniversityChengdu 610041China State Key Laboratory of Biotherapy Department of Integrated Traditional Chinese and Western MedicineRare Diseases CenterWest China HospitalSichuan UniversityChengdu 610041China

Staphylococcal enterotoxin A(SEA)derived from Staphylococcus aureus,as a superantigen,shows potential for cancer immunotherapy,but systemic immunotoxicity restricts its clinical *** delivery of SEA to tumor site provides a promising option for reducing the systemic ***,we constructed an iRGD peptide(H-[Cys-Arg-Gly-Asp-Lys-Gly-Pro-Asp-Cys]-NH_(2))modified nanoparticle(iDPP)to deliver plasmids encoding SEA for melanoma *** iDPP/SEA nanocomplexes efficiently mediated SEA expression in B16-F10 cells in vivo and in vitro and induced the activation of lymphocytes and maturation of murine bone marrow-derived dendritic cells(BMDCs)in *** the subcutaneous B16-F10 melanoma model,the iDPP/SEA nanocomplexes could effectively enhance immune response and T lymphocytes infiltration in tumor site after intravenous administration,thereby considerably decreased melanoma ***,no obvious adverse effect was observed after intravenous administration of the iDPP/SEA nanocomplexes in *** findings demonstrated that gene therapy of SEA is a potential candidate for melanoma treatment.

关键词： Gene therapy Superantigen Melanoma Staphylococcal enterotoxins A Immunotherapyene therapy

语境的创新机制--以瑞恰慈和卡勒为中心的考察

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文艺理论研究 2023年第2期43卷 172-181页

作者：冯毓云周丽明哈尔滨师范大学文学院

20世纪以来,语境理论彰显出巨大的创新机制,主要表现为语境的复义性、再生产性和问题效应。20世纪30年代,瑞恰慈率先突破了传统修辞学的简单“定名法”,提出了文学语境及其“复义的语境定理”。语境的复义性本体论特质,一方面消解了传... 详细信息

20世纪以来,语境理论彰显出巨大的创新机制,主要表现为语境的复义性、再生产性和问题效应。20世纪30年代,瑞恰慈率先突破了传统修辞学的简单“定名法”,提出了文学语境及其“复义的语境定理”。语境的复义性本体论特质,一方面消解了传统语境的单一性、确定性和凝固化,另一方面突破了二元对立思维,以宏观视域和意义的整体性将文学的内部研究与外部研究、纵向研究与横向研究、表层研究与深层研究有机统一起来,为文学文本的创作、欣赏与批评提供了多维广阔的创新空间与方法。20世纪70年代,卡勒秉承了德里达的历史语境观,对语境再生产性理论作出了精粹阐释,指出语境的结构不是封闭、僵化不变的,而是涉连着多重因素和维度,永远处于踪迹的延异状态之中,并且包容了差异性的、不断开放的历史语境,具有再生成新语境的再语境化功能。卡勒凸显了语境的问题效应,走出了一条不断再语境化的学术研究的创新之路。

关键词：语境语境的复义性语境的再生产性瑞恰慈卡勒

CsRAXs negatively regulate leaf size and fruiting ability through auxin glycosylation in cucumber

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Journal of Integrative Plant Biology 2024年第5期66卷 1024-1037页

作者： Jiacai Chen Liu Liu Guangxin Chen Shaoyun Wang Ye Liu Zeqin Zhang Hongfei Li liming Wang Zhaoyang zhou Jianyu Zhao Xiaolan Zhang Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops Department of Vegetable SciencesBeijing key Laboratoy of Growtn and Developmental Regul China Agricultural UniversityBeijing 100193China

Leaves are the main photosynthesis organ that directly determines crop yield and *** the regulatory mechanism of leaf development is crucial for food security and ecosystem ***,we identified the novel function of R2R3-MYB transcription factors CsRAXs in regulating cucumber leaf size and fruiting ***5 single mutant exhibited enlarged leaf size and stem diameter,and Csrax1/2/5 triple mutant displayed further enlargement *** of CsRAX1 or CsRAX5 gave rise to smaller leaf and thinner *** fruiting ability of Csrax1/2/5 plants was significantly enhanced,while that of CsRAX5 overexpression lines was greatly ***,cell number and free auxin level were elevated in mutant plants while decreased in overexpression *** data indicated that CsRAX1/5 directly promoted the expression of auxin glucosyltransferase gene ***,our data suggested that CsRAXs function as repressors for leaf size development by promoting auxin glycosylation to decrease free auxin level and cell division in *** findings provide new gene targets for cucumber breeding with increased leaf size and crop yield.

关键词： auxin glycosylation CsRAXs CsUGT74E2 fruiting ability leaf size