检索结果-南通市图书馆

功能性状对乡土植物混播草地产量及稳定性的影响

在线全文

学校读者我要写书评

暂无评论

草地学报 2024年第8期32卷 2357-2365页

作者：禹安然杨彦泽乔冠栋张俊董一丁侯向阳路文杰山西农业大学草业学院山西太谷030801 农业农村部饲草高效生产模式创新重点实验室山西太谷030801 草地生态保护与乡土草种质资源创新山西省重点实验室山西太谷030801

功能性状能够量化植物生理生态特征并预测生态系统功能。为探究功能性状对乡土植物混播草地群落产量和稳定性的影响,本研究以乡土植物羊草(Leymus chinensis)、赖草(Leymus secalinus)、扁蓿豆(Medicago ruthenica)和非乡土植物紫花苜蓿... 详细信息

功能性状能够量化植物生理生态特征并预测生态系统功能。为探究功能性状对乡土植物混播草地群落产量和稳定性的影响,本研究以乡土植物羊草(Leymus chinensis)、赖草(Leymus secalinus)、扁蓿豆(Medicago ruthenica)和非乡土植物紫花苜蓿(Medicago sativa)为试验材料,分别设置各物种单播以及羊草-扁蓿豆、羊草-扁蓿豆-赖草、羊草-扁蓿豆-赖草-苜蓿混播,比较不同处理下产量和稳定性的差异,并基于性状加权平均值和功能多样性指数,探究功能性状对群落产量及稳定性的影响。结果表明:两物种和三物种混播产量较低,三物种和四物种群落稳定性在大部分时期都高于两物种;功能多样性指数的增大有利于维持群落稳定。光合速率和呼吸速率的提高会对稳定性产生负面影响。综上所述,混播处理没有显著提高产量,两物种组合稳定性较差,光合速率和呼吸速率以及功能多样性是影响稳定性变化的关键因素。

关键词：乡土植物混播功能性状功能多样性生态位互补效应

维普期刊数据库博看期刊

Air-stable room-temperature photodetector based on large-diameter small-bundle single-wall carbon nanotube films

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第14期73卷 205-209页

作者： Zha-Kun Chen Xian-Gang Hu Shu-Yu Guo Peng-xiang hou Chang Liu Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

*** Photodetectors are of great importance for a variety of industrial and scientific applications,such as in spectroscopy,solar energy harvesting,thermo-therapy,military detection,and a variety of biochemical sensors[1–5].Nowadays,relatively mature light detectors are mainly based on semiconducting materials including Ga N,In Ga As and Hg Cd Te[6,7],and their light detection capability can reach 1011 Jones.

关键词： bundle harvesting carbon

Tannic acid coated single-wall carbon nanotube membranes for the recovery of Au from trace-level solutions

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第8期16卷 11350-11357页

作者： Chunmei Wang Peng-xiang hou Yiming Zhao Chao Shi Jiangang Zhang An-Ping Wu Chang Liu Hui-Ming Cheng Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Analysis and Test Center Shenyang University of Chemical TechnologyShenyang 110142China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Materials Science and Engineering Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

The efficient recovery of gold from industrial sewage is important for saving precious metals and remains a big *** report the extraction of gold ions from a trace-level aqueous solution using a tannic acid(TA)coated single-wall carbon nanotube(SWCNT)*** TA has many redox ligands that efficiently adsorb Au(III)from the solution and reduce them to Au *** interwoven SWCNTs not only act as a framework to improve the mechanical stability of the hybrid membrane,but also provide abundant paths for H_(2)O transport,and facilitate the full exposure of the *** a result,the hybrid membrane has an excellent ability to capture gold ions from solution with a high flux of 157 L/(m^(2)·h·bar),and an ultra-high adsorption capacity of 2095 mg/g from solutions with an extremely low gold concentration of 20 *** adsorbed gold ions are reduced to Au particles,which can be easily collected by *** recovered Au nanoparticles on the TA–SWCNT hybrid film had a remarkable surface-enhanced Raman scattering effect that enabled the sensitive detection of rhodamine 6G.

关键词： carbon nanotube tannic acid membrane Au recovery redox reaction

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

三峡船闸辅阀开度仪换型及支架改造研究

机械管理开发 2024年第7期39卷 140-141页

作者：侯翔王小贝童旋艾晖习武长江三峡通航管理局湖北宜昌443000

随着长江航运事业高速发展,三峡通航需求逐年递增,如何降低设备故障率,保障设备稳定高效运行,缩短设备故障处理时间,已成为亟待解决的问题。三峡船闸辅阀是三峡船闸重要运行设备,其作用是通过吊杆组带动阀门运动,控制辅阀的开启和关闭... 详细信息

随着长江航运事业高速发展,三峡通航需求逐年递增,如何降低设备故障率,保障设备稳定高效运行,缩短设备故障处理时间,已成为亟待解决的问题。三峡船闸辅阀是三峡船闸重要运行设备,其作用是通过吊杆组带动阀门运动,控制辅阀的开启和关闭。通过设计新的三峡船闸辅阀开度仪支架并安装,提高辅阀开度仪防护等级及检修的便捷性。

关键词：阀门开度仪支架结构快速拆装

The importance of H_(2) in the controlled growth of semiconducting single-wall carbon nanotubes

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第19期54卷 105-111页

作者： Feng Zhang Jia Sun Yonggang Zheng Peng-xiang hou Chang Liu Min Cheng Xin Li Hui-Ming Cheng Zhen Chen Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of Chin1Shenyang 110016China International Research Center for Computational Mechanics State Key Laboratory of Structural Analysis for Industrial EquipmentDepartment of Engineering MechanicsFaculty of Vehicle Engineering and MechanicsDalian University of TechnologyDalian 116024China Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen InstituteTsinghua UniversityShenzhen 518055China Department of Civil and Environmental Engineering University of MissouriColumbi1MO 65211USA

H_(2) is considered an indispensable component of the atmosphere for the growth of high-quality singlewall carbon nanotubes(SWCNTs)by chemical vapor ***,details of the roles H_(2) playing are still unclear due to the complex conditions of SWCNT *** this study,we elucidate the functions of H_(2) in the selective growth of semiconducting SWCNTs(s-SWCNTs)by using monodispersed uniform Fe nanoparticles as a ***-quality s-SWCNTs were synthesized by finely tuning the concentration of H_(2) and the other growth *** data combined with atomistic simulations indicate that H_(2) not only adjusts the concentration of the carbon source,but also serves as a mild etchant that selectively removes small carbon caps grown by a perpendicular mode from the Fe *** results provide useful hints for the controlled growth of SWCNTs with a semiconducting or metallic conductivity,and even a specific chirality.

关键词： Single-wall carbon nanotubes Controlled growth Semiconducting Growth mode H_(2)

移动床生物膜反应器-生物滤池脱氮除磷中试研究

在线全文

学校读者我要写书评

暂无评论

山东农业大学学报（自然科学版） 2024年第1期55卷 131-136页

作者：侯祥东王洁宇刘爱国王浩宇董坤明李妮孙甲玉山东省海河淮河小清河流域水利管理服务中心山东济南250001 山东农业大学水利土木工程学院山东泰安271018 水发规划设计有限公司山东济南250001

采用移动床生物膜反应器-生物滤池(MBBR-BF)一体化污水处理设备进行实际污水中试试验,考察曝气量对一体化设备挂膜启动阶段污染物去除效果的影响,探究低温环境下一体化设备适应性及污染物处理能力。结果表明:曝气量降低对COD和TN去除率... 详细信息

采用移动床生物膜反应器-生物滤池(MBBR-BF)一体化污水处理设备进行实际污水中试试验,考察曝气量对一体化设备挂膜启动阶段污染物去除效果的影响,探究低温环境下一体化设备适应性及污染物处理能力。结果表明:曝气量降低对COD和TN去除率影响较小,而NH_(3)-N与TP的去除率随之下降,NH_(3)-N平均去除率由87.46%降至48.64%,TP平均去除率由72.41%降至54.66%;常温环境下COD、NH_(3)-N、TN、TP平均去除率分别为92.48%、94.41%、49.39%和61.63%,低温环境运行对污染物去除效果有明显影响。中试应用试验状况良好,一体化设备在冬季低温环境下运行状况正常,可为农村生活污水的有效处理提供重要参考。

关键词：脱氮除磷污水处理设备曝气量环境温度

BmSd gene regulates the silkworm wing size by affecting the Hippo pathway

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

Insect Science 2020年第4期27卷 655-664页

作者： Jin Yin Jing Zhang Tao Li Xia Sun Sheng Qin Cheng-xiang hou Guo-Zheng Zhang Mu-Wang Li Jiangsu Key Laboratory of Sericultural Biology and Biotechnology School of BiotechnologyJiangsu University of Science and TechnologyZhenjiangJiangsuChina The Key Laboratory of Silkworm and Mulberry Genetic Improvement Ministry of AgricultureThe Sericultural Research InstituteChinese Academy of Agricultural SciencesZhenjiangJiangsuChina

Insect wings are developed from the wing disc during *** mori,a model lepidopteran insect,loses flight ability after long-term domestication from the wild silkworm,Bombyx *** mw mutant(ul 1 strain)shows minute wings compared to wild type(e.g.,p50 strain)*** sequencing analysis previously revealed differential Hippo-pathway-related gene expression between the ull and *** Hippo pathway is an evolutionarily conserved signaling cascade that controls organ size during development in *** this study,the function of BmSd which has been characterized as one of the Hippo-pathway-related genes was analyzed for silkworm wing *** found that mats,warts,and hippo expression levels were higher in u11 compared to p50 wing ***(scalloped)expression,which encodes a prominent transcriptional partner to Yorkie(Yki),gradually decreased during the wandering stage in ull,but exhibited the opposite expression pattern in *** BmSd was knocked down by small interfering RNA during the wandering stage in the p50 strain,57.9%of the individuals showed minute ***,ex,kibras and wingless expression levels decreased in the BmSd knockdown ***,BmSd deletion mediated by clustered regularly interspaced short palindromic repeats(CRISPR)/CRISPR-associated protein 9 induced 50%of individuals with minute wings,a phenotype similar to the mw *** result demonstrates that BmSd plays pivotal roles in silkworm wing *** results show that the Hippo signaling pathway participates and plays crucial roles in the regulation of silkworm wing development,and our findings provide a basis for further research on *** wing development.

关键词： BmSd Bombyx mori Hippo pathway metamorphosis wing disc

Seed traits and rodent community interact to determine seed fate:evidence from both enclosure and field experiments

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

Integrative Zoology 2021年第6期16卷 939-954页

作者： xiang hou Bo ZHANG Michael A.STEELE Ning HAN Tuo FENG Jing WANG Xiaoning CHEN Xiaolei AN Gang CHANG Shaanxi Key Laboratory for Animal Conservation Shaanxi Institute of ZoologyXi’anChina School of Biomedicine and Food Engineering Shangluo UniversityShangluoChina Department of Biology Wilkes UniversityWilkes-BarrePennsylvaniaUSA

Animal-mediated seed dispersal is an important ecological process in which a strong mutualism between animals and plants can ***,few studies have examined how a community of potential seed dispersers interacts with sympatric seed *** employed a series of experiments in the Qinling Mountains in both semi-natural enclosure and the field to assess the interactions among 3 sympatric rodent species and 3 Fagaceae tree *** traits all showed similar tannin levels but markedly different physical traits and nutritional *** found that seeds with heavy weight,thick coat,and high nutritional contents were less likely to be eaten in situ but more often to be eaten after dispersal or hoarded by *** results support both the handling time hypothesis and the high nutrition ***,we also found that rodents,maybe,preferred to consume seeds with low levels of crude fiber in situ,and to harvest and hoard those with high levels of crude fiber for later *** sympatric rodent species,Cansumys canus,the largest rodent in our study,harvested and hoarded more Quercus variabilis seeds with high physical and nutritional traits,while Apodemus draco,the smallest rodent,harvested more *** seeds with low physical and nutritional traits,and Niviventer confucianus harvested and hoarded more *** seeds with medium physical and nutritional *** study demonstrates that different seed traits play different roles in influencing the seed fate and the shaping of mutualism and predation interactions within a community of rodent species.

关键词： hoarding behavior seed dispersal seed fate seed traits semi-natural enclosure

标准贯入试验在黄河流域砂土液化地层判别中的应用

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

建筑技术开发 2024年第7期51卷 65-67页

作者：侯向阳王振军孙巍惠冰卞伟张旭中铁一局集团建设安装工程有限公司西安710000 山东省交通科学研究院济南250104

依托济南城市轨道交通6号线某车辆段为例,采用标准贯入试验对工程现场的强夯及未强夯区域进行了试验点位锤击数采集,并基于砂土液化的计算判别方法,对比分析了各区域的砂土液化情况。通过工程实例验证了标准贯入试验对于黄河流域轨道交... 详细信息

依托济南城市轨道交通6号线某车辆段为例,采用标准贯入试验对工程现场的强夯及未强夯区域进行了试验点位锤击数采集,并基于砂土液化的计算判别方法,对比分析了各区域的砂土液化情况。通过工程实例验证了标准贯入试验对于黄河流域轨道交通行业的砂土地层液化现象提供判别方法的可行性,以期为轨道交通工程建设提供安全保障及参考依据。

关键词：黄河流域标准贯入试验砂土液化