检索结果-南通市图书馆

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

锌离子电池锰基正极材料研究进展

蓄电池 2024年第3期61卷 101-110页

作者：侯显豪宋国伟李智超杜晨星游俊伟占彦康朱俊生中国矿业大学化工学院江苏徐州221116

可充电水系锌离子电池是一种环保且电化学性能优异的二次电池,但锰基正极材料在充放电过程中结构易坍塌、导电率低、稳定性差等缺点严重制约了水系锌离子电池的发展。笔者首先阐述了锰基正极材料中锌离子的储存机理,主要有Zn^(2+)嵌入/... 详细信息

可充电水系锌离子电池是一种环保且电化学性能优异的二次电池,但锰基正极材料在充放电过程中结构易坍塌、导电率低、稳定性差等缺点严重制约了水系锌离子电池的发展。笔者首先阐述了锰基正极材料中锌离子的储存机理,主要有Zn^(2+)嵌入/脱出机理、H+/Zn^(2+)共嵌入/脱出机理和化学转化反应机理。Zn^(2+)嵌入/脱出机理包括无相变反应和新相生成反应。而新相生成反应又分为可逆相变和不可逆相变。然后,基于锰基正极材料面临的问题,讨论了改善其储锌性能的主要方法。目前可采用的方法包括缺陷工程、与导电材料复合、离子掺杂、表面修饰技术等。用以上方法改进后的锰基正极材料表现出了更加优异的性能。

关键词：水系锌离子电池锰基化合物正电极 Zn^(2+) 嵌入/脱出 ZnMn_(2)O_(4) 离子掺杂复合材料表面修饰氧缺陷锰缺陷插层相变二氧化锰 [Zn(OH)_(2)]_(3)ZnSO_(4)·xH_(2)O 活性位点

Unveiling Organic Electrode Materials in Aqueous Zinc-Ion Batteries:From Structural Design to Electrochemical Performance

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第10期16卷 47-81页

作者： dujuan Li Yuxuan Guo chenxing Zhang Xianhe Chen Weisheng Zhang Shilin Mei Chang-Jiang Yao State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081People's Republic of China

Aqueous zinc-ion batteries(AZIBs)are one of the most compelling alternatives of lithium-ion batteries due to their inherent safety and economics *** response to the growing demand for green and sustainable energy storage solutions,organic electrodes with the scalability from inexpensive starting materials and potential for biodegradation after use have become a prominent choice for *** gratifying progresses of organic molecules with electrochemical performance in AZIBs,the research is still in infancy and hampered by certain issues due to the underlying complex *** for designing organic electrode materials for AZIBs with high specific capacity and long cycling life are discussed in detail in this ***,we put emphasis on the unique electrochemistry of different redox-active structures to provide in-depth understanding of their working *** addition,we highlight the importance of molecular size/dimension regarding their profound impact on electrochemical ***,challenges and perspectives are discussed from the developing point of view for future *** hope to provide a valuable evaluation on organic electrode materials for AZIBs in our context and give inspiration for the rational design of high-performance AZIBs.

关键词： Aqueous zinc-ion batteries Organic electrodes Functional groups Molecular size/geometry Electrochemical performances

Differences in leaf cuticular wax induced by whole-genome duplication in autotetraploid sour jujube

在线全文

学校读者我要写书评

暂无评论

Horticultural Plant Journal 2024年第1期10卷 66-76页

作者： Meng Li chenxing Zhang Lu Hou Xinru Liu Hanqing Zhao Xiaoming Pang Wenhao Bo Yingyue Li National Engineering Research Center of Tree Breeding and Ecological Restoration College of Biological Sciences and TechnologyBeijing Forestry UniversityBeijing 100083China Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants Ministry of EducationCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijing 100083China The Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration Beijing Forestry UniversityBeijing 100083China

Drought-resistant plants exhibit strong water retention *** this regard,the autotetraploid sour jujube leaves exhibit better water retention than diploid *** comparisons and physiological comparisons of diploid and autotetraploid leaves showed that the autotetraploid leaves had thicker leaf cuticles and more leaf wax accumulation than the diploid leaves,which could reduce cuticle permeability and improve the drought tolerance of *** this study,the cuticular wax crystalloids on the adaxial and abaxial sides of young and mature jujube leaves were observed in the two ploidy types,and unique cuticular wax crystalloids covering a large area of the cuticle on autotetraploid sour jujube leaves may provide an advantage in reducing leaf non-stomata transpiration and improving plant drought *** on the transcriptome,115 differentially expressed genes between diploids and autotetraploids were further analyzed and found to be involved in the accumulation of cuticular wax components,including terpenoids,fatty acids,and lipids,as well as ABC transporter and wax biosynthetic ***,14 genes differentially expressed between glossy autotetraploid leaves and nonglossy diploid leaves,such as LOC107414787,LOC107411574 and LOC107413721,were screened as candidate genes by qRT-PCR *** findings provided insights into how polyploidization improved drought tolerance.

关键词： Autotetraploid Jujube Drought tolerance Cuticular wax RNA-seq

Prognostic value of the Second Revision of the International Staging System (R2-ISS) in a real-world cohort of patients with newlydiagnosed multiple myeloma

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2023年第14期136卷 1744-1746页

作者： Wenqiang Yan Huishou Fan Jingyu Xu Jiahui Liu Lingna Li chenxing du Shuhui Deng Weiwei Sui Yan Xu Dehui Zou Lugui Qiu Gang An State Key Laboratory of Experimental Hematology National Clinical Research Center for Blood DiseasesHaihe Laboratory of Cell EcosystemInstitute of Hematology&Blood Diseases HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeTianjin 300020China Tianjin Institutes of Health Science Tianjin 301600China

To the Editor:Multiple myeloma(MM)is a plasma cell disorder characterized by heterogeneous features.^([1])Accurate risk stratification could predict diverse prognoses of patients with myeloma and attain risk-adapted therapy to extend their ***,the European Myeloma Network(EMN)conducted a large retrospective analysis involving more than 7000 patients with myeloma and developed a new risk model defined as the Second Revision of International Staging System(R2-ISS),with excellent risk distribution among patients enrolled in clinical trials.^([2])The R2-ISS stratifications were based on weighted risk scores of different prognostic factors:ISS II 1.0 point,ISS III 1.5 points,del(17p)1.0 point,elevated lactate dehydrogenase(LDH)1.0 point,t(4;14)1.0 point,and 1q21+0.5 points.

关键词： patients myeloma elevated

Pathological BBB Crossing Melanin-Like Nanoparticles as Metal-Ion Chelators and Neuroinflammation Regulators against Alzheimer’s Disease

在线全文

学校读者我要写书评

暂无评论

Research 2024年第1期6卷 687-706页

作者： Qianqian Huang Chaoqing Jiang Xue Xia Yufan Wang chenxing Yan Xiaorong Wang Ting Lei Xiaotong Yang Wenqin Yang Guo Cheng Huile Gao Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry West China School of PharmacySichuan UniversityChengdu 610041P.R.China Laboratory of Molecular Translational Medicine Center for Translational MedicineKey Laboratory of Birth Defects and Related Diseases of Women and Children(Sichuan University)Ministry of EducationDepartment of PediatricsWest China Second University HospitalSichuan UniversityChengdu 610041P.R.China

Inflammatory responses,manifested in excessive oxidative stress and microglia overactivation,together with metal ion-triggered amyloid-beta(Aβ)deposition,are critical hallmarks of Alzheimer’s disease(AD).The intricate pathogenesis causes severe impairment of neurons,which,in turn,exacerbates Aβaggregation and facilitates AD ***,multifunctional melanin-like metal ion chelators and neuroinflammation regulators(named PDA@K)were constructed for targeted treatment of *** this platform,intrinsically bioactive material polydopamine nanoparticles(PDA)with potent metal ion chelating and ROS scavenging effects were decorated with the KLVFF peptide,endowing the system with the capacity of enhanced pathological blood–brain barrier(BBB)crossing and lesion site accumulation via Aβ*** vitro and in vivo experiment revealed that PDA@K had high affinity toward Aβand were able to hitch a ride on Aβto achieve increased pathological BBB *** engineered PDA@K effectively mitigated Aβaggregate and alleviated neuroinflammation.

关键词： oxidative aggregation chelating

Epinephrine promotes tumor progression and M2 polarization of tumor-associated macrophages by regulating the TRIM2-NF-kB pathway in colorectal cancer cells

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第4期11卷 141-144页

作者： Zhengyi Liu chenxing Jian Wenzheng Yuan Guiqing jia Donghui cheng Yanzhuo Liu Yanling Zhang Bin Zhang Zili Zhou Gaoping Zhao Department of Breast Surgery Henan Provincial People's HospitalThe People's Hospital of Zhengzhou UniversityThe People's Hospital of Henan UniversityZhengzhouHenan 450003China Microbiome Laboratory Henan Provincia People's Hospital Zhengzhou University People's HospitalZhengzhouHenan 450000China Department of Gastrointestinal Surgery Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430022China Department of Gastrointestinal Surgeryll Renmin Hospital of Wuhan UniversityWuhanHubei 430060China Department of Gastrointestinal Surgery Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China Department of Hepatobiliary Surgery Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China

Tumor-associated inflammation is an important component of the tumor microenvironment,and an important factor affecting tumor *** the tumor microenvironment,tumor-associated macrophages(TAMs)receive different stimuli and can be polarized into classically activated M1 macrophages and alternatively activated M2 *** studies have indicated that the polarization of TAMs is closely related to tumor progression.

关键词： nephrin tumor inflammation

Recent advances in organic cathodes for dual-ion batteries

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年

作者： Wenli Hu Weisheng Zhang chenxing Zhang Chengqiu Li Shilin Mei Changjiang Yao School of Mechatronical Engineering State Key Laboratory of Explosion Science and Safety Protection Beijing Institute of Technology

dual-ion batteries(DIBs), a novel energy storage technology wherein both anions and cations actively participate in the electrochemical redox process, hold great promise for further cost reduction in chemical energy storage. Organic materials have garnered significant attention as cathode materials for DIBs due to high working voltage, exceptional rate capability, environmental friendliness, and unique designable structure. This review provides a detailed discussion of the energy storage mechanism and typical characteristics of organic cathode materials from various reaction active sites. This work also highlights the current limitations and proposes ideas for improvement. Finally, potential future directions for the advancement of DIBs are summarized.

关键词：

Patterns of alteration in boar semen quality from 9 to 37 months old and improvement by protocatechuic acid

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2024年第5期15卷 1881-1893页

作者： Ruizhi Hu Xizi Yang Jiatai Gong Jing Lv Xupeng Yuan Mingkun Shi chenxing Fu Bie Tan Zhiyong Fan Liang Chen Hongfu Zhang Jianhua He Shusong Wu Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients College of Animal Science and TechnologyHunan Agricultural UniversityChangsha 410128China College of Animal Science and Technology Hunan Biological and Electromechanical PolytechnicChangsha 410127China State Key Laboratory of Animal Nutrition Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Background Comprehending the patterns of alteration in boar semen quality and identifying effective nutritional interventions are crucial for enhancing the productivity of commercial pig *** study aimed to examine the alteration in semen quality in boars,and assess the impact of protocatechuic acid(PCA)on semen quality during the phase of declining semen *** In Exp.1,a total of 38 Pig Improvement Company(PIC)boars were selected and their semen quality data were recorded from the age of 9 to 37 *** Exp.2,18 PIC boars(28 months old)were randomly assigned into three groups(n=6)and fed a basal diet,a basal diet containing 500 or 1,000 mg/kg PCA,*** experiment lasted for 12 *** The semen volume,concentration,and total number of spermatozoa in boars exhibited an increase from 9 to 19 months old and showed a significant linear decreased trend in 28,24,and 22 months *** motility displayed an upward trajectory,reaching its peak at 20 months of age,and showed a significant linear decreased trend at 20 months *** supplementation of PCA demonstrated an effect to mitigate the decrease in semen volume,concentration of spermatozoa,total number of spermatozoa(P>0.05),and significantly increased the sperm motility(P<0.05).Moreover,supplementation of 1,000 mg/kg PCA significantly increased the sperm viability(P<0.05).Analysis on cellular signaling pathways revealed that PCA restored serum testosterone levels and alleviated oxidative damage by upregulating the expression of HO-1,SOD2,and NQO1 in testicular stromal ***,PCA can enhance phosphorylation by selectively binding to AMP-activated protein kinase(AMPK)protein,thereby improving sperm mitochondrial function and augmenting sperm motility via PGC-1/*** These data elucidated the pattern of semen quality variation in boars within the age range of 9 to 37 months old,and PCA has the potential to be a natural antioxidant to enhance sperm quality throu

关键词： Antioxidants Boars Protocatechuic acid Semen quality Signaling pathway

在线全文

学校读者我要写书评

暂无评论

自由活塞发动机电动压气机优化及熵产分析

内燃机学报 2024年第1期42卷 78-86页

作者：陈雪康施新胡晨星北京理工大学机械与车辆学院北京100081

为了使设计工况下匹配的增压器性能更优从而提高系统能量利用率,针对自由活塞发动机匹配的电动压气机,采用遗传算法对原压气机进行了优化,研究了优化前、后压气机内部流场特性,以熵产分析的方法量化了3种不可逆因素导致的流动损失,并将... 详细信息

为了使设计工况下匹配的增压器性能更优从而提高系统能量利用率,针对自由活塞发动机匹配的电动压气机,采用遗传算法对原压气机进行了优化,研究了优化前、后压气机内部流场特性,以熵产分析的方法量化了3种不可逆因素导致的流动损失,并将优化前、后压气机熵产和涡度分布对比分析,进一步明确了压气机的优化策略.结果表明:叶轮和扩压器中湍流耗散、传热耗散和黏性耗散的比例近乎为6∶3∶1.不可逆损失主要集中在叶顶间隙和叶片压力面,损失来源为间隙泄漏流与部分主流掺混形成的反向涡团.压壳中湍流耗散占比超过85%,具体表现为局部损失和沿程损失.优化后压气机等熵效率提高了6%,流道内涡团的范围、幅值大幅减小,不可逆流动损失降低.上述工作揭示了压气机流场中不同耗散机制的不可逆因素对能量损失的影响机理,为压气机气动优化设计提供指导.

关键词：自由活塞发动机电动压气机不可逆流动损失熵产涡度