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Laser powder bed fusion of NiTiFe shape memory alloy via premixed powder:microstructural evolution,mechanical and functional properties

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Rare Metals 2024年第5期43卷 2300-2316页

作者： Bo Yuan Jin-Guo Ge Liang Zhang Hong-Jun Chen long-sha Wei Yu-Duo Zhou Run-Hua Song Institute of Intelligent Manufacturing Technology Shenzhen PolytechnicShenzhen 518055China School of Mechanical and Electrical Engineering Guilin University of Electronic TechnologyGuilin 541004China Guangdong Advanced Polymer Composite Engineering Technology Research Center Shenzhen Academy of Aerospace TechnologyShenzhen 518057China Jihua Laboratory Testing Center Jihua LaboratoryFoshan 528000China

High-cost pre-alloyed powder is the bottleneck problem that limits the widespread application of additivemanufactured shape memory *** this work,the lowcost ternary NiTiFe shape memory alloy is fabricated by laser powder bed fusion(LPBF)technique via mechanically mixed pre-alloy NiTi powder and varying contents pure Fe powder(1,2,3 wt%).All NiTiFe alloys show a relative density of up to 99.8%by optimizing the LPBF processing *** to the heterogeneous nucleation effect of micron-sized Fe particles,both grain refinement and texture weakening are generated in the NiTiFe alloys,accompanied by the reduction of dislocation *** the room-temperature mechanical properties,the NiTi-3Fe alloy shows the highest microhardness of HV370,but the fracture strength and elongation reduce to1701 MPa and 23%*** evolution of mechanical properties is attributed to the high internal defects,low dislocation density and the incoherent ***,the NiTi-3Fe alloy shows the quasi-linear superelasticity behavior;the superelastic recoverable strain of NiTi-1Fe and NiTi-2Fe decreased with the increase in Fe *** study provided a new-fangled insight for the development of multi-component NiTi-based shape memory alloys by additive manufacturing.

关键词： Additive manufacturing shape memory alloy Metal matrix composite Microstructure Mechanical properties

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锦纶6/涤纶皮芯复合纤维定性鉴别方法研究

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北京服装学院学报（自然科学版） 2024年第3期44卷 32-38页

作者：杨友庆张莉李晓龙龙莎重庆市计量质量检测研究院重庆401121 国家服装及家用纺织产品质量检验检测中心(重庆) 重庆401121 国家皮革制品质量检验检测中心(重庆) 重庆401121

锦纶6/涤纶皮芯复合纤维是一种新型纤维,在现有的纤维定性鉴别体系中暂无有效的鉴别方法。本文采用熔点法快速剥离皮层纤维,同时结合传统显微镜法和溶解法建立了一种操作简便、高效的锦纶6/涤纶皮芯复合纤维定性鉴别方法。该鉴别方法操... 详细信息

锦纶6/涤纶皮芯复合纤维是一种新型纤维,在现有的纤维定性鉴别体系中暂无有效的鉴别方法。本文采用熔点法快速剥离皮层纤维,同时结合传统显微镜法和溶解法建立了一种操作简便、高效的锦纶6/涤纶皮芯复合纤维定性鉴别方法。该鉴别方法操作简单、成本低、不需使用大型设备,可有效鉴别锦纶6/涤纶皮芯复合纤维并可应用于类似复合纤维的鉴别中。

关键词：皮芯复合纤维聚酯纤维聚酰胺纤维纤维鉴别

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Inflammatory caspase-related pyroptosis:mechanism,regulation and therapeutic potential for inflammatory bowel disease

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Gastroenterology Report 2018年第3期6卷 167-176,I0001页

作者： Yuan-Yuan Yuan Ke-Xin Xie sha-long Wang Lian-Wen Yuan Department of Geriatric Surgery The Second Xiangya Hospital of Central South UniversityChangshaHunan 410011China Medical Laboratory Technology 1602 Central South University Xiangya School of Medicine172 Tongzipo RoadYueLu DistrictChangshaHunan 410011China

As an essential part of programmed cell death,pyroptosis is an inflammatory response that is elicited upon infection by intracellular *** diseases,atherosclerosis and vital organ damage occur if pyroptosis is *** are the main cells that induce pyroptosis with the help of intracellular pattern-recognition receptors stimulated by danger signals and pathogenicmicroorganisms in the cytosol of host *** inflammatory caspases induce pyroptosis and produce pro-inflammatory cytokines,such as interleukin-1b and *** programmed cell death is classified as canonical or non-canonical based on inflammatory caspases,which includes caspase-1(in human andmouse)and caspase-11(inmouse)or caspase-4 and-5(in humans).Activated inflammatory caspases cleave the pore-forming effector protein,gasdermin-D,inducing osmotic pressure deregulation of internal fluids and subsequently rupturing the cell *** caspases could be attractive therapeutic targets for inflammatory bowel disease(IBD)in which pyroptosismay play an important *** article reviews the current understanding of the mechanismof pyroptosis,focusing on the regulation of inflammatory caspases and therapeutic strategies for IBD.

关键词： Pyroptosis gasdermin-D inflammasome caspase inflammatory bowel disease

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抽穗期高温胁迫对不同水稻品种产量构成和品质的影响

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作物杂志 2024年第1期 117-125页

作者：季平刘金龙柳浩匡佳丽叶世河龙莎杨洪涛彭勃徐晨刘晓龙宜春学院生命科学与资源环境学院江西省高等学校硒农业工程技术研究中心江西宜春336000 吉林省农业科学院农业资源与环境研究所吉林长春130033

为系统研究抽穗期高温胁迫对水稻产量构成以及稻米品质的影响,以江西省普遍推广种植的8个水稻品种为材料,测定各水稻品种在抽穗期高温胁迫下(38℃/32℃,昼/夜)抽穗期、穗部性状、产量构成和稻米品质的差异。结果表明,抽穗期高温胁迫下,... 详细信息

为系统研究抽穗期高温胁迫对水稻产量构成以及稻米品质的影响,以江西省普遍推广种植的8个水稻品种为材料,测定各水稻品种在抽穗期高温胁迫下(38℃/32℃,昼/夜)抽穗期、穗部性状、产量构成和稻米品质的差异。结果表明,抽穗期高温胁迫下,水稻抽穗期缩短,穗部发育受到抑制,穗长和穗重显著下降。高温胁迫导致各品种产量下降了27.44%~40.33%,产量构成中以千粒重的下降幅度较大。高温胁迫导致籽粒淀粉和蔗糖含量、糙米率、精米率和整精米率下降,葡萄糖和果糖含量、垩白粒率及垩白度升高。黄华占和湘两优900在抽穗期高温胁迫下的产量损失较小,与对照处理相比,有较高的穗长、穗重和穗粒数,以及较小的籽粒淀粉和蔗糖含量下降幅度。产量损失较大的品种为粤王丝苗和湘两优2号。高温胁迫下水稻品种各指标的综合抗逆系数与产量损失高度一致。综上,抽穗期高温胁迫对水稻产量形成和稻米品质的影响具有一致性,产量损失较大的品种其稻米品质受影响也较大。

关键词：水稻高温胁迫抽穗期产量品质

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Lenvatinib combined with sintilimab plus transarterial chemoembolization as first-line treatment for advanced hepatocellular carcinoma

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World Journal of Clinical Cases 2024年第2期12卷 285-292页

作者： sha-sha Sun Xiao-Di Guo Wen-Dong Li Jing-long Chen Department of Oncology Capital Medical University Affiliated Beijing Ditan HospitalBeijing 100015China

BACKGROUND Recently,combination therapy has shown a better trend towards improved tumour response and survival outcomes than monotherapy in patients with hepatocellular carcinoma(HCC).However,research on triple therapy[lenvatinib+sintilimab+transarterial chemoembolization(TACE)]as a first-line treatment for advanced HCC is *** To evaluate the safety and efficacy of triple therapy as a first-line treatment for advanced *** HCC patients with Barcelona Clinic Liver Cancer stage C treated with triple therapy were *** patients were treated with lenvatinib every day and sintilimab once every 3 ***,TACE was performed every 4-6 wk if *** primary outcome of the study was overall survival(OS).The secondary outcomes were the objective response rate(ORR),disease control rate(DCR),and incidence of adverse *** Forty HCC patients who underwent triple therapy were retrospectively analysed from January 2019 to January *** a median follow-up of 8.5 months,the 3-,6-,and 12-mo OS rates were 100%,88.5%,and 22.5%,*** ORR and DCR were 45%and 90%,*** median progressive free survival and median OS were not *** complications were observed in 76%of the patients(grade 3,15%;grade 4,2.5%).CONCLUSION Combination therapy comprising lenvatinib,sintilimab and TACE achieved promising outcomes in advanced HCC patients and had manageable effects.

关键词： Lenvatinib Sintilimab Advanced hepatocellular carcinoma Combination therapy Tumor response

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Spatio-temporal Expression Study of Phosphorylated 70-kDa Ribosomal S6 Kinase (p70S6k) in Mesial Temporal Lobe Epilepsy

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Chinese Medical Sciences Journal 2012年第1期27卷 7-10页

作者： Xiao-liang Xing long-ze sha Yuan Yao Yan Shen Li-wen Wu Qi Xu National Laboratory of Medical Molecular Biology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100005 China Department of Neurology Peking Union Medical College Hospital Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100730 China

Objective To determine the spatio-temporal expression of p70S6k activation in hippocampus in mesial temporal lobe epilepsy. Methods Temporal lobe epilepsy model was established by stereotaxically unilateral and intrahip-pocampal injection of kainite acid (KA) in adult male C57BL/6 mice. Latent and chronic epileptogenesis were represented by mice 5 days after KA injection (n=5) and mice 5 weeks after KA injection (n=8), respectively. Control mice (n=5) were injected with saline. Immunohistochemical assays were performed on brain sections of the mice. Results Hippocampus both ipsilateral and contralateral to the KA injection displayed significantly up-regulated pS6 immunoreactivity in dispersed granule cells in 5-day and 5-week model mice. Conclusion The activation of p70S6k is mainly located in the dentate gyrus in KA-induced mouse model of temporal lobe epilepsy, indicating that the activation may be related with the disperse degree and hypertrophy of granule cells.

关键词： mesial temporal lobe epilepsy p70S6k kainate acid immunoreactivity

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灌浆初期高温胁迫对水稻籽粒活性氧积累及产量形成的影响

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西北农林科技大学学报（自然科学版） 2024年第5期52卷 33-47页

作者：刘晓龙叶世河廖俊婕骆依菲龙莎廖婧芃钟歆谢菲谢子怡曾鹏胡永轩徐晨宜春学院生命科学与资源环境学院江西宜春336000 吉林省农业科学院农业资源与环境研究所吉林长春130033

【目的】研究灌浆初期高温胁迫对水稻籽粒活性氧积累及产量形成的影响,为耐热水稻种质资源的筛选和鉴定提供理论依据。【方法】以长江中下游地区普遍推广种植的8个水稻品种为材料,在灌浆初期进行高温胁迫(38℃/32℃,昼/夜),研究各水稻... 详细信息

【目的】研究灌浆初期高温胁迫对水稻籽粒活性氧积累及产量形成的影响,为耐热水稻种质资源的筛选和鉴定提供理论依据。【方法】以长江中下游地区普遍推广种植的8个水稻品种为材料,在灌浆初期进行高温胁迫(38℃/32℃,昼/夜),研究各水稻品种在灌浆初期高温胁迫下的ROS含量、抗氧化酶活性、淀粉合成相关酶活性、产量及其构成要素以及稻米品质的差异。【结果】与对照相比,灌浆初期高温胁迫导致水稻籽粒O_(2)^(-·)和H_(2)O_(2)含量及抗氧化酶活性显著增加。在不同水稻品种中,淀粉合成相关酶活性对灌浆初期高温胁迫的响应具有差异性。高温胁迫下,产量损失较大水稻品种的O_(2)^(-·)和H_(2)O_(2)含量增幅较大,淀粉合成酶活性受高温胁迫影响也较大。灌浆初期高温胁迫导致水稻结实率、千粒质量、收获指数和产量显著下降,其中黄华占和湘两优900的产量损失较小,在灌浆初期的耐热性较强;粤王丝苗、泰优390和湘两优2号的产量损失较大,在灌浆初期的耐热性弱。灌浆初期高温胁迫导致糙米率、精米率和淀粉含量显著下降,垩白粒率和垩白度增加。高温胁迫下,产量损失较大水稻品种的淀粉含量下降幅度较大,稻米品质受高温胁迫影响也较大。在高温胁迫下,水稻产量与ROS含量显著负相关,而与抗氧化酶活性显著正相关。产量、籽粒加工指标、淀粉含量和淀粉合成酶活性的抗逆系数与ROS含量的抗逆系数显著负相关,而与抗氧化酶活性的抗逆系数显著正相关。【结论】灌浆初期高温胁迫导致水稻籽粒ROS过量积累是降低淀粉合成酶活性和淀粉含量,进而导致产量和稻米外观加工品质下降的重要因素。ROS的增加量可作为灌浆初期水稻耐热性评价的参考指标。

关键词：水稻高温胁迫籽粒产量抗逆系数耐热品种

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Quantitative effect of kerogen type on the hydrocarbon generation potential of Paleogene lacustrine source rocks,Liaohe Western Depression,China

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Petroleum Science 2024年第1期21卷 14-30页

作者： sha-sha Hui Xiong-Qi Pang Fu-Jie Jiang Chen-Xi Wang Shu-Xing Mei Tao Hu Hong Pang Min Li Xiao-long Zhou Kan-Yuan Shi State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China Exploration and Development Research Institute PetroChina Liaohe Oilfield CompanyPanjin 124010LiaoningChina

Kerogen types exert a decisive effect on the onset and capacity of hydrocarbon generation of source *** source rocks in the Liaohe Western Depression are characterized by thick deposition,high total organic carbon(TOC)content,various kerogen types,and a wide range of thermal ***,their hydrocarbon generation potential and resource estimation can be *** this study,geochemical tests,numerical analysis,hydrocarbon generation kinetics,and basin modeling were integrated to investigate the differential effects of kerogen types on the hydrocarbon generation potential of lacustrine source *** hydrocarbon generation and expulsion(HGE)models of different kerogen types were established quantitatively upon abundant Rock-Eval/TOC/vitrinite reflectance(R_(o))*** sets of good-excellent source rocks deposited in the fourth(Es4),third(Es3),and first(Es1)members of Paleogene shahejie Formation,are predominantly types I-II_(1),II_(1)-II_(2),and II-III,*** activation energy of types I-II_(2)kerogen is concentrated(180-230 kcal/mol),whereas that of type III kerogen is widely distributed(150-280 kcal/mol).The original hydrocarbon generation potentials of types I,II_(1),II_(2),and III kerogens are 790,510,270,and 85 mg/g TOC,*** Ro values of the hydrocarbon generation threshold for type I-III source rocks gradually increase from 0.42%to 0.74%,and Ro values of the hydrocarbon expulsion threshold increase from 0.49%to 0.87%.Types I and II_(1)source rocks are characterized by earlier hydrocarbon generation,more rapid hydrocarbon expulsion,and narrower hydrocarbon generation windows than types II_(2)and III source *** kerogen types also affect the HGE history and resource *** types(conventional,tight,and shale oil/gas)and three levels(realistic,expected,and prospective)of hydrocarbon resources of different members in the Liaohe Western Depression are *** suggest that t

关键词： Kerogen type Hydrocarbon generation potential Lacustrine source rocks Liaohe western depression

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基于应变片法的低温条件下热膨胀特征参数的测量方法与装置（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2014年第5期15卷 323-330页

作者： Ke TANG long sha Yi-jian LI Tao JIN Shu-juan LIU Institute of Refrigeration and Cryogenics Zhejiang University

研究目的:为了满足低温系统的材料选择和结构设计对于材料热膨胀特征参数的需求,研发低温条件下精确、快速、方便操作、低成本的热膨胀特征参数测量方法和系统装置。创新要点:完成了卡玛合金箔应变片在77–293 K低温温区敏感系数的修正... 详细信息

研究目的:为了满足低温系统的材料选择和结构设计对于材料热膨胀特征参数的需求,研发低温条件下精确、快速、方便操作、低成本的热膨胀特征参数测量方法和系统装置。创新要点:完成了卡玛合金箔应变片在77–293 K低温温区敏感系数的修正,保证了基于应变片技术的低温条件材料热膨胀特征参数测量的精度;所研制装置合理的热设计和等速率式温度控制模式使得材料热膨胀特征参数在77–293 K温区的测量可在14小时内快速完成。研究方法:针对77–293 K温区,基于应变片测量方法,研制了采用比例-积分-微分(PID)温控系统的固体材料热膨胀特征参数测量装置(见图2和3)。通过将304不锈钢的测量数据与美国国家标准与技术研究院(NIST)公布数据进行比较,完成了卡玛合金箔应变片在77–293 K低温温区的敏感系数修正(见图7和8)。采用修正后的敏感系数进行无氧铜线性收缩率测量,并与NIST公布数据比较(见图9和表2),验证了该装置在77–293 K低温温区的测量精度。重要结论:获得了77–293 K低温温区卡玛合金箔应变片敏感系数的修正结果;基于修正敏感系数的应变片法测量装置,采用0.3 K/min的等速率式温度控制模式,可实现77–293 K低温温区固体材料热膨胀特征参数的精确、快速测量。

关键词：热膨胀线性收缩率应变片低温

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Carbene-catalyzed enantioselective seleno-Michael addition as access to antimicrobial active Se-containing heterocycles

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Science China Chemistry 2024年第7期67卷 2199-2205页

作者： Hongyan long sha Zhao Chunyan Jian Xiuli Wu Fengfei Lu Minghong Liao Fengrui Che Xingxing Wu Yonggui Robin Chi State Key Laboratory of Green Pesticide Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou UniversityGuiyang 550025China School of Chemistry Chemical Engineeringand BiotechnologyNanyang Technological UniversitySingapore 637371Singapore

Organoseleniums exhibit a diverse set of biological activities that are pivotal for drug discovery and are widely explored in synthetic chemistry and material *** many transformations have been developed for non-enantioselective C–Se bond formations,the catalyst-controlled stereoselective preparation of chiral organoseleniums continues to be of considerable *** particular,there are limited studies on the enantioselective seleno-Michael addition reactions to access chiral selenium functional ***,we disclose a carbene-catalyzed highly enantioselective nucleophilic C–Se bond construction through formal[3+3]annulations between selenocarboxamides and bromoenals,affording seleno-thiazinone products with good yields and excellent *** choice of a weak inorganic base was pivotal to suppressing the unproductive racemization and decomposition of the selenium ***,the catalytically generated chiral selenium-containing heterocyclic products feature remarkable antimicrobial activities that could serve as promising lead scaffolds for further agrochemical development.

关键词： seleno-Michael addition organocatalysis N-heterocyclic carbene seleno-heterocycles antimicrobial activity

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