检索结果-南通市图书馆

Journal of Energy Chemistry 2020年第9期29卷 390-397,I0012页

作者： You Li Xiao Zhang Guihua liu Ashton Gerhardt Katelyn Evans aizhong Jia Zisheng Zhang Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving Tianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyHebei University of TechnologyTianjin 300130China Department of Chemical and Biological Engineering University of OttawaOttawaOntario K1N 6N5Canada

Lithium sulfur(Li-S)batteries demonstrate great promise for efficient energy storage systems once the lithium polysulfide(LPS)shuttling and sluggish redox kinetics can be well ***,we developed a sea urchin-structured oxygen-deficient titanium dioxide semiconductor anchored with cobalt nano-dots(Co@TiO2-x)as a high-performance multifunctional sulfur host material for Li-S *** sea urchin-structured Co@TiO2-x offers strong structural stability and strengthened chemical interaction towards ***,the incorporation of Co nano-dots into TiO2 leads to increased oxygen vacancies,which augments the electrical conduction and benefits LPS conversion acceleration as *** a result,the oxygen vacancy-rich Co@TiO2-x composite exhibits excellent conductivity,strong LPS confinement and promoted sulfur electrochemical kinetics,rendering enhanced LPS shuttling inhibition and rapid redox *** to these features,the Co@TiO2-x/S cathode exhibits a discharge capacity of 803 mAh g-1at 1 C and a good cyclic stability upon 500 cycles with a low capacity fading rate of 0.07%per *** synergistic design of conductive multifunctional LPS barrier is also promising to enlighten the material engineering in other energy storage applications.

关键词： Titanium dioxide Oxygen vacancy Cobalt nano-dots Lithium-sulfur battery Conversion kinetics

Effects of Nitrogen Rate and Split Application Ratio on Nitrogen Use and Soil Nitrogen Balance in Cotton Fields

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2017年第4期27卷 769-777页

作者： LI Pengcheng DONG Helin liu aizhong liu Jingran SUN Miao LI Yabing liu Shaodong ZHAO Xinhua MAO Shuchun State Key Laboratory of Cotton Biology Institute of Cotton Research of Chinese Academy of Agricultural SciencesAnyang 455000China

The Yellow River valley is one of the three largest cotton production areas in *** experiment was performed in cotton fields of Anyang,China from 2013 to 2014 to investigate the effects of nitrogen(N) application rate and the ratio between basal and topdressing N fertilizer on N balance in a soil-plant system,N use efficiency,and cotton *** N application rates as treatments were applied with the same split application *** of the N(50% basal fertilizer) was applied at pre-planting and the other half(50% topdressing fertilizer) at the initial flowering *** treatments were:zero N(N0,control),90 kg N ha^(-1)(N90(5/5)),180 kg N ha^(-1)(N180(5/5)),270 kg N ha^(-1)(N270(5/5),a reduced N rate),and 360 kg N ha^(-1)(N360(5/5),a conventional N rate).Additional 2 split application ratios as treatments were applied with the same N rate of 270 kg N ha^(-1).The split application ratios between basal N and topdressing N were 30%:70%(N270(3/7)) and 70%:30%(N270(7/3)).Results demonstrated that soil NH_4-N content in the 0–60 cm layer and NO3-N content in the 0–20 cm layer increased with increased N rate at the squaring and boll-opening stages and then decreased to lower levels at the initial flowering and harvest *** NO_3-N content in the 20–60 cm layer after the initial flowering stage increased with the increase of topdressing N *** apparent N surplus varied at different growth stages,while the soil apparent N surplus over the entire growth period exhibited a positive relationship at N rates over 180 kg ha^(-1).Seed cotton yield of N270(3/7) was the highest of all *** N uptake,N agronomic efficiency,and apparent N recovery efficiency of N270(3/7) were significantly higher than those of N270(5/5) and N270(7/3) in both growing *** suggest both economic and ecological benefits in cotton production in the Yellow River valley could be created,by appropriately reducing total N application rate and increasing the ratio of top

关键词： apparent N recovery efficiency, crop yield, N agronomic efficiency, N fertilizer, plant growth, soil apparent N surplus

不同遮阳率对蒜头果幼苗生长及生物量分配的影响

在线全文

学校读者我要写书评

暂无评论

西南林业大学学报（自然科学） 2024年第2期44卷 36-41页

作者：熊旭东刘爱忠鲁赛郭晓春贾代顺徐德兵西南林业大学林学院云南昆明650233 云南省林业和草原科学院油茶研究所云南广南663300

利用遮阳网产生的不同光照强度设80%、40%、无遮阳3种遮阳条件,研究遮阳率变化对1年生蒜头果幼苗苗木质量的影响。结果表明:随着遮阳率增加,幼苗地径、叶片数、主根长、一级根数、一级根长及各器官生物量先增加后减少;不同遮阳率下蒜头... 详细信息

利用遮阳网产生的不同光照强度设80%、40%、无遮阳3种遮阳条件,研究遮阳率变化对1年生蒜头果幼苗苗木质量的影响。结果表明:随着遮阳率增加,幼苗地径、叶片数、主根长、一级根数、一级根长及各器官生物量先增加后减少;不同遮阳率下蒜头果幼苗之间各器官生物量分配存在显著差异(P<0.05),表现为80%遮阳率时,地上部分生物量分配较多而根系分配较少,随着遮阳率降低蒜头果幼苗选择优先于根系生长;遮阳率过高会导致蒜头果幼苗根系生长受到限制,反之则致使地上部分发育困难,40%遮阳率蒜头果幼苗发育均衡,质量最佳。

关键词：蒜头果遮阳率生长量生物量

一种实现单层MoS_(2)光致发光显著增强的有效缺陷工程策略

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2024年第7期67卷 2232-2238页

作者：陈荧黄卓睿刘华伟喻国粮张金鼎徐哲元陈明星李东马超黄明朱小莉陈舒拉蒋英潘安练 Key Laboratory for Micro-Nano Physics and Technology of Hunan Province Hunan Institute of Optoelectronic IntegrationSchool of Physics and ElectronicsCollege of Materials Science and EngineeringHunan UniversityChangsha 410082China School of Physics and Electronics Hunan Normal UniversityChangsha 410081China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

二维过渡金属硫族化合物(TMDCs)材料被认为是拓展摩尔定律的极具前景的候选材料.然而,该材料的低光致发光效率严重限制了其实际应用,其本质源于材料制备中不可避免引入的缺陷.在本文中,我们报道了一种Sr掺杂单层MoS_(2)的有效缺陷工程策... 详细信息

二维过渡金属硫族化合物(TMDCs)材料被认为是拓展摩尔定律的极具前景的候选材料.然而,该材料的低光致发光效率严重限制了其实际应用,其本质源于材料制备中不可避免引入的缺陷.在本文中,我们报道了一种Sr掺杂单层MoS_(2)的有效缺陷工程策略,该策略在实验上通过简便的化学气相沉积(CVD)一步法成功实现.所制备的具有亚毫米(~324μm)级的大尺寸样品的光致发光可实现高达两个数量级的增强,并伴随着载流子寿命的显著增强.这一现象主要归因于Sr掺杂后MoS_(2)体系中其三激子向激子转换.与此同时,掺杂样品的辐射质量和稳定性也显著提升.第一性原理计算进一步阐明了其调控机制,即在MoS_(2)中引入适当互补缺陷能级与其自身的缺陷能级协同,从而可调节其载流子组分,以实现光致发光的显著增强.此外,我们的缺陷工程策略也适用于其他掺杂剂,如钙掺杂剂.我们的工作报告了一种可以显著提升单层MoS_(2)的荧光性能的有效缺陷工程策略,这为设计和调控二维TMDCs的光电特性提供一种极具前途的方法.

关键词： MoS_(2) substitutional doping photoluminescence in-tensity enhancement first-principles calculations

3种寄主植物对蒜头果幼苗生长和生物量分配的影响

在线全文

学校读者我要写书评

暂无评论

西南林业大学学报（自然科学） 2024年第3期44卷 191-197页

作者：熊旭东刘爱忠鲁赛郭晓春贾代顺徐德兵西南林业大学林学院云南昆明650233 云南省林业和草原科学院油茶研究所云南文山663300

选择清香木、猪毛蒿及桤木与蒜头果共同栽培1a后,测定分析不同寄主植物对蒜头果苗高和地径等生长指标、生物量分配和叶绿素含量的影响,并据此进行苗木质量评价。结果表明:蒜头果在实验中表现出明显的寄主偏好性,其中猪毛蒿与蒜头果共同... 详细信息

选择清香木、猪毛蒿及桤木与蒜头果共同栽培1a后,测定分析不同寄主植物对蒜头果苗高和地径等生长指标、生物量分配和叶绿素含量的影响,并据此进行苗木质量评价。结果表明:蒜头果在实验中表现出明显的寄主偏好性,其中猪毛蒿与蒜头果共同栽培1 a后,蒜头果幼苗苗高达77.5cm,地径达13.69mm,叶面积达51.47cm^(2),一级根数达8.33根,平均一级根长达28.91cm,吸器数达27.0个,单株生物量达27.14g,与单株栽培处理呈极显著差异。同时猪毛蒿为寄主时,其地上分配比为51.08%,整株地上和地下两部分呈均衡发展趋势,根茎比、根冠比和根叶比相比单株种植有所提升,非光合器官与光合器官比降低,因此蒜头果能更好利用寄主为自身生长发育提供养分。不同寄主植物对蒜头果叶绿素含量影响显著,表明寄主能发挥一定的遮阳作用,影响蒜头果叶绿素的含量,但在蒜头果苗木发育过程中不起主导作用。苗木质量指数显示,猪毛蒿为寄主植物时,QI为4.36,苗木质量最佳。

关键词：蒜头果根寄主植物生物量

维普期刊数据库博看期刊

Characterization and functional divergence of genes encoding sucrose transporters in oilseeds castor bean

在线全文

学校读者我要写书评

暂无评论

Oil Crop Science 2022年第1期7卷 31-39页

作者： Pei Jin Di Wu Huan Dai Rui Sun aizhong liu Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China Ministry of EducationSouthwest Forestry UniversityKunmingChina Key Laboratory of Economic Plants and Biotechnology Yunnan Key Laboratory for Wild Plant ResourcesKunming Institute of BotanyChinese Academy of SciencesKunmingChina

Castor bean(Ricinus communis L.)is an economically important non-edible oilseed *** seed oils are rich in hydroxy fatty acid,which are highly valuable with a wide range of industrial *** transportation is critical in regulating the growth,development and oilseed yield in castor *** transporters or carriers(SUTs or SUCs)play a central role in orchestrating sucrose allocation and aiding in plant adaptation to diverse *** this study,based on castor bean genome,three RcSUCs(RcSUC2,RcSUC3 and RcSUC4)were identified and *** expressional profiles of RcSUCs in different tissues such as leaf,stem,root,phloem and seed tissues exhibited a distinct divergence of gene expression,suggesting that the functions of RcSUC2,RcSUC3 and RcSUC4 are differentiated into long or short-distance transportation among ***,under abiotic stresses including hot temperature,low temperature,drought and salt stresses,the sugar allocation among leaf,stem and roots was *** expressional changes of Rc SUCs in leaf,stem and root tissues were associated with sugar transportation and *** together,the differential expression of Rc SUCs among tissues responsing to abiotic stress suggested functional differences in sucrose transport and redistribution in different *** study is helpful to understand the physiological and molecular mechanisms of sucrose transportation and allocation among tissues in heterotrophic oilseeds,and could provide clues for genetic improvement and optimization of cultivation practices.

关键词： Sucrose transporter Castor bean Gene identification Expression profile Abiotic stress

Evidence for moiréintralayer excitons in twisted WSe_(2)/WSe_(2) homobi layer superlattices

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2022年第7期11卷 1493-1500页

作者： Biao Wu Haihong Zheng Shaofei Li Junnan Ding Jun He Yujia Zeng Keqiu Chen Zongwen liu shula Chen Anlian Pan Yanping liu School of Physics and Electronics Hunan Key Laboratory for Super-microstructure and Ultrafast ProcessCentral South University932 South Lushan RoadChangshaHunan 410083China State Key Laboratory of High-Performance Complex Manufacturing Central South University932 South Lushan RoadChangshaHunan 410083China Department of Applied Physics School of Physics and ElectronicsHunan UniversityChangsha 410082China School of Chemical and Biomolecular Engineering The University of SydneySydneyNSW 2006Australia The University of Sydney Nano Institute The University of SydneySydneyNSW 2006Australia Hunan Institute of Optoelectronic Integration College of Materials Science and EngineeringHunan UniversityChangshaHunan 410082China Shenzhen Research Institute of Central South University A510aVirtual University BuildingSouthern DistrictHigh-tech Industrial ParkYuehai StreetNanshan DistrictShenzhenChina

Recent advances in twisted van der Waals heterostructure superlattices have emerged as a powerful and attractive platform for exploring novel condensed matter physics due to the interplay between the moirépotential and Coulomb *** moirésuperlattices act as a periodic confinement potential in space to capture interlayer excitons(IXs),resulting in moiréexciton arrays,which provide opportunities for quantum emitters and many-body *** observation of moiréIXs in twisted transition-metal dichalcogenide(TMD)heterostructures has recently been widely ***,the capture and study of the moiréintralayer excitons based on TMD twisted homobilayer(T-HB)remain ***,we report the observation of moiréintralayer excitons in a WSe_(2)/WSe_(2) T-HB with a small twist angle by measuring PL *** multiple split peaks with an energy range of 1.55-1.73 eV are different from that of the monolayer WSe_(2) exciton *** split peaks were caused by the trapping of intralayer excitons via the moiré*** confinement effect of the moirépotential on the moiréintralayer excitons was further demonstrated by the changing of temperature,laser power,and valley *** findings provide a new avenue for exploring new correlated quantum phenomena and their applications.

关键词： twisted layer quantum

基于CsPbBr_(3)纳米片的低阈值上转换等离子体激光器

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 Materials 2024年第7期67卷 2277-2284页

作者：张全龙翟继新刘晨曦钟倩倩纪志强易潇钟阳光何承林骆子煜汪练成陈舒拉潘安练 Key Laboratory for Micro-Nano Physics and Technology of Hunan Province Hunan Institute of Optoelectronic IntegrationCollege of Materials Science and EngineeringSchool of Physics and ElectronicsHunan UniversityChangsha 410082China School of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China School of Physics and Electronics Hunan UniversityChangsha 410082China State Key Laboratory of Precision Manufacturing for Extreme Service Performance College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China

上转换激光器为新一代高度集成的非线性光电应用提供了一个强大的平台,解决了现代光子集成电路不断发展对小型化、低损耗和高质量非线性光源的诉求.然而,对于具有反斯托克斯过程的上转换激光器,减小尺寸和阈值是其不可避免的巨大挑战.... 详细信息

上转换激光器为新一代高度集成的非线性光电应用提供了一个强大的平台,解决了现代光子集成电路不断发展对小型化、低损耗和高质量非线性光源的诉求.然而,对于具有反斯托克斯过程的上转换激光器,减小尺寸和阈值是其不可避免的巨大挑战.本文报道了一种基于CsPbBr_(3)纳米片的室温上转换等离子体纳米激光器,该激光器在较宽的尺寸范围内表现出显著的阈值降低,同时依旧保持着较高的品质因子.更激动人心的是,本文成功制造了厚度低至70 nm的小型化上转换等离子体激光器,突破光学衍射极限到深亚波长范围.同时,本文利用仿真模拟描述了双光子激发光场的分布情况,揭示了等离子体辅助激光发射并降低阈值的过程.此外,SiO_(2)绝缘层厚度依赖实验证明了双光子激发光约束强度和珀塞尔效应的可调谐特性,这为实现等离子体器件性能的有效调控提供了有效方案.本文展示了高效和低阈值的上转换等离子体纳米激光器,为片上非线性光源的发展奠定了夯实的基础.

关键词： upconversion plasmonic nanolasers perovskites Purcell effect

脂多糖诱导仔猪小肠上皮细胞炎性损伤模型的建立

在线全文

学校读者我要写书评

暂无评论

黑龙江八一农垦大学学报 2024年第3期36卷 50-57页

作者：赵磊刘云卓王毅孙会张爱忠李沐阳黑龙江八一农垦大学动物科技学院大庆163319 吉林农业大学动物科学技术学院

LPS诱导IPEC-J2细胞炎性损伤模拟仔猪体内早期断奶应激,构建IPEC-J2细胞炎性损伤模型。首先采用0、0.1、1、10、100μg·mL^(-1)LPS处理IPEC-J2细胞,MTS法检测LPS处理IPEC-J2细胞0、4、8、12、16、24 h后的增殖率,初步确定炎性损伤模型... 详细信息

LPS诱导IPEC-J2细胞炎性损伤模拟仔猪体内早期断奶应激,构建IPEC-J2细胞炎性损伤模型。首先采用0、0.1、1、10、100μg·mL^(-1)LPS处理IPEC-J2细胞,MTS法检测LPS处理IPEC-J2细胞0、4、8、12、16、24 h后的增殖率,初步确定炎性损伤模型构建的适宜浓度为10μg·mL^(-1),适宜时间为16 h。为了进一步确定LPS的最佳浓度,采用0~100μg·mL^(-1)LPS处理IPEC-J2细胞16 h,探究不同浓度LPS对IPEC-J2细胞的影响。结果表明:0.1~100μg·mL^(-1)LPS均可以不同程度的提高IPECJ2细胞IL^(-1)β、IL-6、IL-8和TNF-α含量及基因表达量,下调ZO-1、Occludin、Claudin-1基因表达量,降低IL-10、IgM、IgA和IgG含量,其中10μg·mL^(-1)的作用效果最佳;0.1~100μg·mL^(-1)LPS均可以不同程度的提高IPEC-J2细胞中ROS含量和细胞凋亡率,其中10μg·mL^(-1)的作用效果最佳。由此可见,LPS诱导细胞构建炎性损伤模型的适宜条件为10μg·mL^(-1)和16 h。

关键词：仔猪 IPEC-J2细胞脂多糖炎性损伤模型

Identification of KCS gene family and functional analysis of FAE-like genes from Malania oleifera

在线全文

学校读者我要写书评

暂无评论

Oil Crop Science 2021年第1期6卷 35-40页

作者： Huan Dai Yanyu Zhang Pei Jin Fengping Song Wei Xu aizhong liu Zuqing Meng Tianquan Yang Department of Plant Science Tibet Agriculture and Animal Husbandy CollegeLinzhi860000China College of Life Science Northwest UniversityXi’an710069ShaanxiChina Southwest Forestry University Kunming650224China Kunming Institute of Botany Chinese Academy of SciencesKunming650201China

KCS(3-ketoacyl-CoA synthase)is the key enzyme catalyzing the first step of very long chain fatty acid(VLCFA)*** showed that different KCSs possessed different substrate *** oleifera are abundance of VLCFAs in its mature seeds,especially the nervonic acid,which is essential for human *** this study,we identified and characterized 18 KCS genes in *** *** analysis showed that these KCS genes were classified into four subfamilies,including two FAE-like,six KCS-like,eight FDH-like and two *** concentrated on the functional role of two FAE-like genes,Maole003085.T1 and Maole004215.T1 which encoded predicted amino acid residues of 516 and 518 in protein,*** sequence alignment showed that their two proteins contained the known and conserved active sites among FAE-like *** heterologous expression in wild type yeast(Saccharomyces cerevisiae)INVSc1,we found that Maole004215.T1 could produce four new fatty acids including C22:0/C22:1 and C24:0/C24:1,but Maole003085.T1 only produced C22:***,upon heterologous expression in mutant yeast BY4741-△elo3,we found the Maole003085.T1 could produce C24:0 and C26:0,while the Maole004215.T1 could catalyze the formation of fatty acids C24:0,C26:0 and C28:*** results showed Maole003085.T1 and Maole004215.T1 had fatty acid elongation activity in yeast,and possessed different substrate preference in the production of different ***,we found Maole004215.T1 could produce nervonic acid in yeast,which provides molecular basis on the genetic improvement and genic engineering for producing nervonic acid resources by using biotechnological methods.

关键词： Malania oleifera KCS gene Very long chain fatty acid Nervonic acid