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Combined effects of carrier scattering and Coulomb screening on photoluminescence in InGaN/GaN quantum well structure with high In content

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Chinese Physics B 2021年第4期30卷 530-534页

作者： Rui Li Ming-Sheng Xu Peng Wang Cheng-Xin Wang shang-da qu Kai-Ju Shi Ye-Hui Wei Xian-Gang Xu Zi-Wu Ji School of Microelectronics Shandong UniversityJinan 250100China Shandong Inspur Huaguang Optoelectronics Co. Ltd.Weifang 261061China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China

Photoluminescence(PL) spectra of two different green InGaN/GaN multiple quantum well(MQW) samples S1 and S2,respectively with a higher growth temperature and a lower growth temperature of InGaN well layers are analyzed over a wide temperature range of 6 K-3 30 K and an excitation power range of 0.001 mW-75 *** excitation power-dependent PL peak energy and linewidth at 6 K show that in an initial excitation power range,the emission process of the MQW is dominated simultaneously by the combined effects of the carrier scattering and Coulomb screening for both the samples,and both the carrier scattering effect and the Coulomb screening effect are stronger for S2 than those for S1;in the highest excitation power range,the emission process of the MQWs is dominated by the filling effect of the high-energy localized states for S1,and by the Coulomb screening effect for *** behaviors can be attributed to the fact that sample S2 should have a higher amount of In content in the InGaN well layers than S1 because of the lower growth temperature,and this results in a stronger component fluctuation-induced potential fluctuation and a stronger well/barrier lattice mismatchinduced quantum-confined Stark *** explanation is also supported by other relevant measurements of the samples,such as temperature-dependent peak energy and excitation-power-dependent internal quantum efficiency.

关键词： photoluminescence carrier localization effect internal quantum efficiency growth temperature

Visible Light-Induced Collapse of Molecular Microcrystals into Droplets by E-to-Z Photoisomerization and Melting Phase Transition

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CCS Chemistry 2024年第4期6卷 1071-1084页

作者： Tian-Yi Xu Min Cui Chengxi Zhao shang-Wu Zhou Tian-Le Zhang Hui-Yao Lin Fei Tong da-Hui qu Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237

Harnessing photoresponsive behavior in organic crystals,such as shape and morphology deformation,on multiple scales is intriguing with respect to precise spatiotemporal operation,because dynamic deformations are promising in fabricating future intelligent ***,we synthesized a new photoresponsive molecular crystal composed of dimethyl(E)-2-(3-(naphthalen-1-yl)allylidene)malonate((E)-DNAM)that undergoes E-to-Z photoisomerization accompanied by photoinduced crystal-to-liquid melting phase transition when exposed to visible *** of expanding in bulk polycrystals,single-crystal(E)-DNAM rectangular microplates in an aqueous solution rapidly collapsed into liquid droplets,showing a remarkable drastic reduction in surface area of more than 97%after light *** deduce that the unique microscopic morphology of microplates with high aspect ratios of length-tothickness reaching up to 1000 is mainly responsible for the photoinduced melting leading to drastic *** addition,the cohesive forces of liquid photoproduct facilitate the overall deformations and *** have shown a facile way to achieve the remarkable collapse of molecular crystals into droplets by photochemical reaction and phase transition.

关键词： molecular crystals crystal-to-liquid transition extreme deformations photochemistry crystal engineering flexible crystals

Pogostemon cablin essential oil as feed additive promotes the repair of the rumen epithelial barrier in heat-stressed beef cattle

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Animal Nutrition 2024年第3期18卷 433-440页

作者： Huan Chen Mingrui Yang Xianglong shang Hao Chen Yi Li Yanjiao Li Lin Li Mingren qu Xiaozhen Song Jiangxi Province Key Laboratory of Animal Nutrition Engineering Research Center of Feed DevelopmentJiangxi Agricultural UniversityNanchang 330045China

Pogostemon cablin essential oil(PEO),extracted from ***,has anti-oxidant,anti-inflammatory,and anti-stress properties,as well as the ability to improve gastrointestinal *** study aims to evaluate the effects of PEO on the performance,rumen epithelial morphology,and barrier function in heat-stressed beef ***-six male Jingjiang cattle at 18 months old were randomly assigned into four groups and fed a diet containing PEO at 0(control),50,100,or 150 mg/kg in the feed concentrate(n=9).All experimental cattle were fed under high temperature and humidity in summer for 60 *** results indicated that 50 mg/kg of PEO treatment enhanced the average daily gain of beef cattle compared with the control group(P=0.032).All PEO treatments reduced the diamine oxidase activity(P=0.004)and malondialdehyde content(P=0.008)in *** addition,the content of 70 kda heat shock protein in the 100 mg/kg group was increased,and the activity of glutathione peroxidase and total antioxidant capacity in both 100 mg/kg and 150 mg/kg groups were enhanced compared to the control group(Pquitin-binding protein in contrast to the control group(Pdamaged rumen epithelium of heat-stressed cattle by down-regulating the mitogen-activated protein kinase signaling pathway.

关键词： Beef cattle Heat stress Rumen epithelial barrier Pogostemon cablin essential oil Growth performance MAPK signaling pathway

The MRE11–ATM–SOG1 DNA damage signaling pathway confers rice immunity to Xanthomonas oryzae

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Plant Communications 2024年第4期5卷 194-207页

作者： Zhan Xu Mingnan qu Chuanlin Shi Hong Zhang Wu Chen Hongge Qian Zhipeng Zhang Jiehua Qiu Qian Qian Lianguang shang Guangzhou City Academy of Agricultural Sciences Key Laboratory of BiologyGenetics and BreedingGuangzhou 510000China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding College of AgricultureYangzhou UniversityYangzhou 225009China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 311400China Yazhouwan National Laboratory No.8 Huanjin RoadYazhou DistrictSanya CityHainan Province 572024China These authors contributed equally to this article

Plants are constantly exposed to microbial pathogens in the *** branch of innate plant immunity is mediated by cell-membrane-localized receptors,but less is known about associations between DNA damage and plant immune ***,we show that rice(Oryza sativa)mesophyll cells are prone to DNA double-stranded breaks(DSBs)in response to ZJ173,a strain of Xanthomonas oryzae ***(Xoo).The DSB signal transducer ataxia telangiectasia mutated(ATM),but not the ATM and Rad3-related branch,confers resistance against ***,the MRE11–ATM module phosphorylates suppressor of gamma response 1(SOG1),which activates several phenylpropanoid pathway genes and prompts downstream phytoalexin biosynthesis during Xoo ***,overexpression of the topoisomerase gene TOP6A3 causes a switch from the classic non-homologous end joining(NHEJ)pathway to the alternative NHEJ and homologous recombination pathways atXoo-induced *** enhanced ATM signaling of the alternative NHEJ pathway strengthens the SOG1-regulated phenylpropanoid pathway and thereby boosts Xoo-induced phytoalexin biosynthesis in TOP6A3-OE1 overexpression ***,the MRE11–ATM–SOG1 pathway serves as a prime example of plant–pathogen interactions that occur via host non-specific recogni*** function of TOP6-facilitated ATM signaling in the defense response makes it a promising target for breeding of rice germplasm that exhibits resistance to bacterial blight disease without a growth penalty.

关键词： Oryza sativa Xanthomonas oryzae pv.oryzae DSBs phytoalexins MRE11–ATM–SOG1 TOP6 complex

中国农民银行农田水利贷款研究(1942—1947)

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中国社会经济史研究 2024年第2期 95-113页

作者：瞿商马筝中南财经政法大学经济史学研究中心湖北武汉430073 苏州城市学院马克思主义学院江苏苏州215104

1942年“四行”专业化,中国农民银行成为唯一办理农田水利贷款的国家级金融机构。中国农民银行办理大型和小型农田水利贷款的贷放业务有所不同:大型农田水利贷款由中国农民银行贷放八成或九成,其余由行政院水利委员会或水利部配贷,以省... 详细信息

1942年“四行”专业化,中国农民银行成为唯一办理农田水利贷款的国家级金融机构。中国农民银行办理大型和小型农田水利贷款的贷放业务有所不同:大型农田水利贷款由中国农民银行贷放八成或九成,其余由行政院水利委员会或水利部配贷,以省政府为贷款对象,省属水利机关为工程承办机关,向受益业主征收水费作为分期偿还本息的来源;小型农田水利贷款以民力自办为主,不足经费则由中国农民银行贷款八成,农林部配贷二成垫头,且由行方与农林部负责工程督导等事宜,贷款对象主要为合作社,按照合作放款利率计息。中国农民银行农田水利贷款对于扩大耕地面积、提高农业种植效率、增加地值和增产增收发挥了重要作用,但同时存在农田水利贷款区域差异显著、贷款数额不敷实际费用、还贷困难造成贷款循环使用效率低下等问题。

关键词：中国农民银行大型农田水利贷款小型农田水利贷款绩效

Farnesyltransferase inhibitor lonafarnib suppresses respiratory syncytial virus infection by blocking conformational change of fusion glycoprotein

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Signal Transduction and Targeted Therapy 2024年第7期9卷 2970-2983页

作者： Qi Yang Bao Xue Fengjiang Liu Yongzhi Lu Jielin Tang Mengrong Yan Qiong Wu Ruyi Chen Anqi Zhou Lijie Liu Junjun Liu Changbin qu Qingxin Wu Muqing Fu Jiayi Zhong Jianwei Dong Sijie Chen Fan Wang Yuan Zhou Jie Zheng Wei Peng Jinsai shang Xinwen Chen Guangzhou National Laboratory Guangzhou 510005China State Key Laboratory of Respiratory Disease Guangzhou Medical UniversityGuangzhou 511436China Wuhan Institute of Virology Chinese Academy of SciencesWuhan 430071China School of Basic Medical Sciences Guangzhou Medical UniversityGuangzhou 511436China GMUGIBH Joint School of Life Sciences Guangzhou Medical UniversityGuangzhou 511436China Guangzhou Institutes of Biomedicine and Health Chinese Academy of SciencesGuangzhou 510530China shanghai Institute of Materia Medica Chinese Academy of SciencesShanghai 201203China School of Pharmaceutical Science and Technology Hangzhou lnstitute for Advanced StudyUCASHangzhou 310024China

Respiratory syncytial virus(RSV)is the major cause of bronchiolitis and pneumonia in young children and the *** are currently no approved RSV-specific therapeutic small molecules *** high-throughput antiviral screening,we identified an oral drug,the prenylation inhibitor lonafarnib,which showed potent inhibition of the RSV fusion *** exhibited antiviral activity against both the RSV A and B genotypes and showed low cytotoxicity in HEp-2 and human primary bronchial epithelial cells(HBEC).Time-of-addition and pseudovirus assays demonstrated that lonafarnib inhibits RSV entry,but has farnesyltransferase-independent antiviral ***-electron microscopy revealed that lonafarnib binds to a triple-symmetric pocket within the central cavity of the RSV F metastable pre-fusion *** at the RSV F sites interacting with lonafarnib showed resistance to lonafarnib but remained fully sensitive to the neutralizing monoclonal antibody ***,lonafarnib dose-dependently reduced the replication of RSV in BALB/c ***,lonafarnib could be a potential fusion inhibitor for RSV infection.

关键词： neutral metastable approved

The Young Girl's Skull in a Bronze Vessel

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China Book International 2024年第5期 26-31页

作者： qu Changtao China Strategic Planning Association China Adventure Association

In 1984,a bronze yon was unearthed at the Yinxu site in Henan Province,discovered by a young archaeologist during an *** yon was a cooking vessel from the shang Dynasty,consisting of two parts:The upper part called zeng,used to hold food,and the lower part called li(Li),used to hold *** the bottom was heated with charcoal,the water would turn into steam and cook the food *** principle is similar to modern ***,this yon from Anyang’s Yinxu site was extremely unusual-it contained not steamed buns,but a human head.

关键词： heated cooking steam

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低温条件下锂电池放电特性分析

电源学报 2024年第S1期22卷 98-104页

作者：刘锐尚丽平屈薇薇中国电源学会西南科技大学信息工程学院

了解锂电池的低温性能与低温容量损失路径对促进锂电池的低温应用及进一步开发更优秀的低温锂电池具有重要的现实意义。基于此，使用正极材料为较好低温性能钴酸锂和高比容量的三元锂复配合成，负极材料为钛酸锂的锂离子电池分别设计不... 详细信息

了解锂电池的低温性能与低温容量损失路径对促进锂电池的低温应用及进一步开发更优秀的低温锂电池具有重要的现实意义。基于此，使用正极材料为较好低温性能钴酸锂和高比容量的三元锂复配合成，负极材料为钛酸锂的锂离子电池分别设计不同温度下不同倍率的放电实验、混合脉冲功率特性实验及0.05C小倍率充、放电实验，研究其在低温下的放电特性。实验结果表明：在低温下，锂电池的容量损失是可逆的，待放电温度回至常温时，锂电池的性能会恢复原样；温度和放电倍率对于锂电池的放电容量具有显著的影响；在低温环境下，随着温度的降低，欧姆内阻与极化内阻均增大，但极化内阻增加速率更快；锂电池的容量损失主要是由于锂电池活性材料损失、锂离子损失和内阻增加造成的，三者在不同温度区间内的作用力不尽相同，但整体而言，锂电池活性材料损失对于低温条件下锂电池的容量影响更大。

关键词：钴酸锂三元锂钛酸锂低温放电性能可逆容量损失

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一类新的单参数F-C函数及其应用

工程数学学报 2024年第3期41卷 494-506页

作者：李硕尚有林屈德强河南科技大学数学与统计学院洛阳471023 上海理工大学管理学院上海200093

填充函数法作为可以有效求解多变量、多极值函数的全局最优化方法,通过交替求解目标函数和填充函数找到问题的全局最优解或近似全局最优解,其寻优能力与所采用的填充函数性质有直接关系。因此,构造具有良好数学性质的填充函数新形式一... 详细信息

填充函数法作为可以有效求解多变量、多极值函数的全局最优化方法,通过交替求解目标函数和填充函数找到问题的全局最优解或近似全局最优解,其寻优能力与所采用的填充函数性质有直接关系。因此,构造具有良好数学性质的填充函数新形式一直都是填充函数法的重要研究领域。然而,当前已有的填充函数存在以下问题:填充函数不连续不可微;参数过多难以控制和调整;包含指数项或对数项。为解决上述不足,将填充函数和跨越函数相结合,引入求解无约束全局优化问题的F-C函数定义。根据此定义,构造一类新的单参数F-C函数,此参数在迭代过程中易于调节。在分析该函数理论性质的基础上,提出新的全局优化F-C函数方法,该算法打破传统填充函数算法的求解框架,成功减少求解目标函数的次数,提高计算效率。通过数值计算验证F-C函数算法的有效性和可行性。最后,用F-C函数算法对切削温度实验中的参数进行优化,并与已有结果进行比较,数值试验结果表明该算法具有更好的拟合效果。

关键词：全局最优化填充函数跨越函数 F-C函数切削温度