检索结果-南通市图书馆

Science China Chemistry 2024年第2期67卷 551-557页

作者： Zhenzhen Wu Jing Wang lili liu Shang Guo Juan Li Xianming Zhang Shanxi Institute for Functional Food Shanxi Agricultural UniversityTaiyuan030031China Institute of Crystalline Materials Shanxi UniversityTaiyuan030006China Key Laboratory of Interface Science and Engineering in Advanced Materials College of ChemistryTaiyuan University of TechnologyTaiyuan030024China

Covalent organic frameworks(COFs) are a potential platform for carbon dioxide(CO_(2)) conversion owing to their periodic permanent porosity,adjustable structure,and chemical stability.For good catalytic performance in CO_(2) conversion,collaborative multifunctions should be strategically integrated into the catalytic system design and construction.In this study,a four-in-one high-efficiency catalyst was synthesized and tested for CO_(2) cycloaddition to form cyclic carbonate.The obtained Tp-MPB-BrCOF had a high nitrogen content,which enhanced its CO_(2) affinity through substantial Lewis acid-base or dipole-quadrupole interactions;moreover,the acid(protons transferring from oxygen(–OH) to nitrogen(–NH)),hydrogen bond donor(hydroxyl group),and Br-(nucleophile group) served as three active sites,further improving the catalyst activity.These results provide a basis for designing efficient and stable CO_(2)-conversion catalysts.

关键词： covalent organic framework C2-phenyl-substituted benzimidazolium CO_(2)conversion four-in-one catalyst

Research progress on the design of electrolyte additives and their functions for zinc-ion batteries

在线全文

学校读者我要写书评

暂无评论

Materials Futures

Materials Futures 2024年第1期3卷 31-62页

作者： Yuxin Cui Ruixin Zhang Sinian Yang lili liu Shimou Chen 1 College of Chemistry and Materials Engineering Beijing Technology and Business UniversityBeijing 100048People’s Republic of China State Key Laboratory of Chemical Resource Engineering Beijing Key Laboratory of Electrochemical Process and Technology of MaterialsBeijing University of Chemical TechnologyBeijing 10029People’s Republic of China

In recent years,zinc-ion batteries(ZIBs)have been considered one of the most promising candidates for next-generation electrochemical energy storage systems due to their advantages of high safety,high specific capacity and high economic efficiency.As an indispensable component,the electrolyte has the function of connecting the cathode and the anode,and plays a key role in the performance of the battery.Different types of electrolytes have different effects on the performance of ZIBs,and the use of additives has further developed the research on modified electrolytes,thus effectively solving many serious problems faced by ZIBs.Therefore,to further explore the improvement of ZIBs by electrolyte engineering,it is necessary to summarize the current status of the design of various electrolyte additives,as well as their functions and mechanism in ZIBs.This paper analyzes the challenges faced by different electrolytes,reviews the different solutions of additives to solve battery problems in liquid electrolytes and solid electrolytes,and finally makes suggestions for the development of modified ZIB electrolytes.It is hoped that the review and strategies proposed in this paper will facilitate development of new electrolyte additives for ZIBs.

关键词： zinc-ion batteries additives liquid electrolytes solid electrolytes interface

Analysis of the Effect of Integrated Extended Care Model in Improving the Quality of Life of Elderly Patients with Type 2 Diabetes Mellitus

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Clinical and Nursing Research 2024年第4期8卷 174-179页

作者： lili liu The Second Rongfu Military Hospital Siping 136502Jilin ProvinceChina

Objective: To analyze the impact of an integrated extended care model on improving the quality of life of elderly patients with Type 2 Diabetes Mellitus (T2DM). Methods: A total of 176 patients admitted to the hospital from March 2015 to February 2018 were selected and randomly assigned to an observation group and a control group, with 88 patients each. The control group implemented conventional nursing interventions, and the observation group carried out an integrated extended-care model. The level of glycemic control, quality of life, and daily medication adherence between both groups were compared. Results: The observation group showed significant improvement in the level of glycemic control, and their fasting blood glucose, 2-hour postprandial blood glucose, and glycated hemoglobin levels were significantly lower as compared with those in the study group (P < 0.05). The quality of life of the patients in the observation group was higher than that of the control group (P < 0.05). The observation group had a higher compliance score (95.48 ± 7.45) than the control group (81.31 ± 8.72) (t = 8.909, P < 0.05). Conclusion: The integrated extended care model allows patients to receive comprehensive and individualized nursing services after discharge, which improves the effect of drug therapy and the quality of life of patients.

关键词： Integrated extended care model Elderly type 2 diabetes mellitus Quality of life

High-performance wood-based thermoelectric sponges for thermal energy harvesting and smart buildings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第6期17卷 5349-5357页

作者： Ding Zhang Qi Li Yanjie Fang Peijia Bai lili liu Jiaqi Guo Guangfa Wang Yuetong Zhou Rujun Ma School of Materials Science and Engineering National Institute for Advanced MaterialsSmart Sensing Interdisciplinary Science CenterNankai UniversityTianjin 300350China

The development of renewable woods for power generation can help improve the energy efficiency of buildings,and promote the concept design and implementation of“smart buildings”.Here,with specific chemical treatment and hydrothermal synthesis,we demonstrated the practical value of natural wood for thermoelectric power generation in smart buildings.The prepared wood-based thermoelectric sponges show high Seebeck coefficients of 320.5 and 436.6μV/K in the vertical and parallel directions of the longitudinal channel of wood.After 500 cycles of the compressive strain at 20%,the corresponding Seebeck coefficients increase up to 413.4 and 502.1μV/K,respectively,which is attributed to the improved contact and connection between tellurium thermoelectric nanowires.The Seebeck coefficients are much larger than those of most reported inorganic thermoelectric materials.Meanwhile,the thermoelectric sponges maintain excellent thermoelectric and mechanical stability.We further modeled the application value of wood-based thermoelectric sponges in smart buildings for power generation.Relatively high thermoelectric electricity can be obtained,such as in Beijing with over 1.5 million kWh every year,demonstrating the great potential in thermal energy harvest and energy supply.

关键词： wood thermoelectric effect thermal energy harvesting smart buildings energy supply

Targeted mutations of BnPAP2 lead to a yellow seed coat in Brassica napus L.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第2期23卷 724-730页

作者： Wei Huang Ruyu Jiao Hongtao Cheng Shengli Cai Jia liu Qiong Hu lili liu Bao Li Tonghua Wang Mei Li Dawei Zhang Mingli Yan Hunan Research Center of Heterosis Utilization in Rapeseed/Crop Research Institute Hunan Academy of Agricultural SciencesChangsha 410125China Hunan Key Laboratory of Economic Crops Genetic Improvement and Integrated Utilization/School of Life and Health Science Hunan University of Science and TechnologyXiangtan 411201China Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture and Rural Affairs/Oil Crops Research InstituteChinese Academy of Agricultural SciencesWuhan 430062China

The yellow seed trait is preferred by breeders for its potential to improve the seed quality and commercial value of Brassica napus.In the present study,we produced yellow seed mutants using a CRISPR/Cas9 system when the two BnPAP2 homologs were knocked out.Histochemical staining of the seed coat demonstrated that proanthocyanidin accumulation was significantly reduced in the pap2 double mutants and decreased specifically in the endothelial and palisade layer cells of the seed coat.Transcriptomic and metabolite profiling analysis suggested that disruption of the BnPAP2 genes could reduce the expression of structural and regulated genes in the phenylpropanoid and flavonoid biosynthetic pathways.The broad suppression of these genes might hinder proanthocyanidin accumulation during seed development,and thereby causing the yellow seed trait in B.napus.These results indicate that BnPAP2 might play a vital role in the regulatory network controlling proanthocyanidin accumulation.

关键词： yellow seed BnPAP2 proanthocyanidins CRISPR/Cas9

The Influence of Typhoon'Hongxia'on the Intrusion of the Kuroshio Current into the South China Sea

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2023年第2期22卷 297-312页

作者： GAO Shumin HAN Shuzong WANG Shicheng WU Dexing WANG Mingjie WU Kejian liu lili College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Physical Oceanography Laboratory Ocean University of ChinaQingdao 266100China Tianjin Key Laboratory for Oceanic Meteorology Tianjin 300074China Tianjin Institute of Meteorological Science Tianjin 300074China

This paper uses the Coupled Ocean-Atmosphere-Wave-Sediment Transport(COAWST)model to analyze the impact of typhoon‘Hongxia’on the velocity and position movement of the Kuroshio axis,the impact of typhoons on the Kuroshio intrusion into South China Sea(SCS),the corresponding water,heat,and salt fluxes,and the impact of Kuroshio water in the northeastern SCS.When typhoon‘Hongxia’passed,the Kuroshio intrusion into the SCS was the most significant at 21?N latitude.In the vertical direction,the Kuroshio intrusion was strongest in the subsurface layer,leading to the most significant changes in temperature and salinity in the northeastern part of the SCS in the subsurface layer.Under the influence of the southeastern monsoon in summer,a large amount of low-salinity water accumulates at the surface of the northeastern part of the SCS,and Kuroshio intrusive water remains in the bottom and middle portions of the subsurface layer.The westward deviation of the Kuroshio axis caused by the typhoon displays a certain lag compared with the hot and salty water intrusion into the SCS approximately 7 d later.The impact of the typhoon on the Kuroshio intrusion into the SCS lasts for 20 d.The typhoon caused increases in the water,heat,and salt fluxes associated with the Kuroshio intrusion into the SCS,and the contribution of the typhoon to these fluxes was as high as 40%.Under typhoon conditions,the maximum Kuroshio intrusion flux reached more than twice that before the typhoon.

关键词： typhoon Kuroshio intrusion South China Sea COAWST coupling model flux

Development of high-energy-density materials

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2020年第2期63卷 195-213页

作者： liu JiPing liu lili liu XiaoBo School of Materials Science&Engineering Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

The performance of an energetic compound is mainly decided by parameters such as density, oxygen balance, heat of formation,and stability. Among these properties, density is the most important factor because it determines the detonation pressure and velocity. One of the trends in the development of high-energy-density materials(HEDMs) involves the study of energetic materials with high nitrogen levels. A compound with high nitrogen content can obtain substantial energy from the heat of formation rather than from the intramolecular oxidation of carbon skeleton to release energy in the form of a nitro group or nitrate ester. In addition to excellent performance, the newly developed energetic materials should also possess high working power and insensitivity toward external influences for ensuring the safety of charge and service, high energy release rate, long service life,good compatibility, excellent biological performance, low toxicity, safe battlefield environment, and low moisture absorption,which meet the requirements of military and civilian use. This review summarizes the research progress on global HEDMs.TNAZ, FOX-7, octanitrocubanane, TAM, TKX-50, and N5 were believed to show promise in achieving application goals. The prospective vision of HEDMs containing ions, total nitrogen, metal hydrogen, and nuclear energetic isomers, overcoming technical barriers, synthesis of all-nitrogen materials, theoretical studies on desorption/adsorption system, and challenging technical problems that need to be solved for the safety of synthetic nitrogen compounds were discussed to further elucidate the effect of this subject.

关键词： total nitrogen high-energy-density material energetic ion salt metal hydrogen nuclear energetic isomer

我国文学研究方法论建设历程及其多层次性问题

在线全文

学校读者我要写书评

暂无评论

文学评论 2024年第3期 24-32页

作者：刘俐俐南开大学文学院

1985年被称为“方法论年”,它原本以更新文艺学美学观念为目的,却开启了我国文学研究方法论建设的第一阶段。这一阶段以方法论的多层次性、方法的内涵与艺术本体对应等基本原理为代表的理论成果,深刻影响了后续建设的走向。第二阶段则... 详细信息

1985年被称为“方法论年”,它原本以更新文艺学美学观念为目的,却开启了我国文学研究方法论建设的第一阶段。这一阶段以方法论的多层次性、方法的内涵与艺术本体对应等基本原理为代表的理论成果,深刻影响了后续建设的走向。第二阶段则为方法论与本体论各自分离性研究。第三阶段集中在方法论的主体意识、解读意识和文学批评方法论等方面的研究。建设历程自然呈现了方法论的多层次属性。多层次性是1985年方法论热时讨论的重要问题之一,已形成了一般方法论、文艺学方法论和文艺内部的具体方法等多层次性的思想成果。其中的一般方法论即马克思主义的理性思维,它给予中间层和最底层方法以灵魂和思维规定。多层次性的另一涵义则为,对应“文学文本多层次结构”属性的方法多层次性及其组合。当下探寻和建设适应文学新样式和结构新方式等变化的批评方法论的任务已经提上了日程。正题一反题一合题是文学研究方法论建设的辩证发展趋势。马克思主义唯物史观及其辩证法作为精髓则贯穿螺旋型发展之始终。

关键词：文学研究方法论方法论原理方法内涵与艺术本体多层次性

The Influence of Vulnerable Narcissism on Social Anxiety among Adolescents:The Mediating Role of Self-Concept Clarity and Self-Esteem

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mental Health Promotion 2024年第6期26卷 429-438页

作者： Yuetan Wang Xianle Yan lili liu Xiran Lu Lan Luo Xiaobin Ding Key Laboratory of Behavioral and Mental Health of Gansu Province Northwest Normal UniversityLanzhou730070China School of Psychology Northwest Normal UniversityLanzhou730070China

Social anxiety (SA) is a prevalent mental health issue among adolescents, and vulnerable narcissism (VN) can exacerbate thiscondition. This study aims to investigate the impact of vulnerable narcissism on social anxiety in adolescents, specificallyfocusing on the mediating effects of self-concept clarity (SCC) and self-esteem (SE) in the relationship between vulnerablenarcissism and social anxiety. Through cluster sampling, a questionnaire survey was conducted among 982 students from threesecondary schools in two provinces. The data was analyzed using structural equation modeling (SEM). The results revealedthat there was a significant negative correlation between vulnerable narcissism and both self-concept clarity and self-esteem,while there was a significant positive correlation between vulnerable narcissism and social anxiety. Additionally, self-conceptclarity showed a significant positive correlation with self-esteem but had a negative correlation with social anxiety. Both selfconceptclarity and self-esteem played an intermediary role in the chain linking vulnerable narcissism to social anxiety. Thisstudy confirms the mediating role of both self-concept clarity and self-esteem in explaining how vulnerable narcissisminfluences social anxiety, providing valuable insights into its underlying mechanism.

关键词： Social anxiety vulnerable narcissism self-concept clarity self-esteem adolescent

Limit Test and pH Determination of 5-Hydroxymethylfurfural in Jiulongteng Honey

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Medicinal Plant 2024年第3期15卷 23-25,29页

作者： Beiqiao YIN Yanyan CHEN lili liu Shenggao YIN Yanxia CEN Shiman CHEN Baise People s Hospital Baise 533000China Wuzhou Vocational College Wuzhou 543003China Guangxi University of Chinese Medicine Nanning 530000China Beihai Public Inspection and Testing Center Beihai 536000China

[Objectives]To explore the effect of storage time on pH and 5-hydroxymethylfurfural content in Jiulongteng honey.[Methods]The pH of Jiulongteng honey was determined by neutralization titration with sodium hydroxide standard solution.The content of 5-hydroxymethylfurfural in Jiulongteng honey was determined by HPLC.Chromatographic conditions:ZORBAX SB-C 18 column(250 mm×4.6 mm,5μm)from Agilent Co.,Ltd.,acetonitrile-0.1%formic acid solution(5:95)as mobile phase,flow rate of 0.8 mL/min,5-hydroxymethylfurfural detection wavelength of 284 nm,guanosine detection wavelength of 254 nm.[Results]The pH of 12 batches of Jiulongteng honey was 3.70-3.84 in the new honey stage,3.92-4.05 in the old honey stage 1,and 4.25-4.53 in the old honey stage 2;5-hydroxymethylfurfural was not detected in the new honey stage,5-hydroxymethylfurfural was detected in FM-001 in the old honey stage 1,and 5-hydroxymethylfurfural was detected in most samples in the old honey stage 2.[Conclusions]The pH and 5-hydroxymethylfurfural content of 12 batches of Jiulongteng honey met the requirements within 3 years of storage.There was no 5-hydroxymethylfurfural in Jiulongteng honey,but with the extension of storage time,the detection amount of 5-hydroxymethylfurfural increased significantly even if Jiulongteng honey was stored at low temperature.Therefore,5-hydroxymethylfurfural can be used as an important indicator of honey freshness.

关键词： Jiulongteng honey 5-hydroxymethylfurfural pH HPLC