检索结果-南通市图书馆

Oil-polluted water purification via the carbon-nanotubes-doped organohydrogel platform

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

Nano Research 2022年第6期15卷 5653-5662页

作者： Xuetao Xu Xizi Wan Haonan Li yikai zhang Wen He Shuli Wang Miao Wang Xu Hou Shutao Wang CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China College of Materials Xiamen UniversityXiamen 361005China College of Physical Science and Technology Xiamen UniversityXiamen 361005China University of Chinese Academy of Sciences Beijing 100049China

Solar-driven evaporators are promising for tackling freshwater scarcity but still challenged in simultaneously realizing comprehensive performances at one platform for sustainable and efficient application in real-world environments,such as stablefloating,scalability,salt-resistance,efficient vaporization,and anti-oil-fouling ***,we design a hybrid organohydrogel evaporator to achieve the enduring oil contamination repulsion with maintaining accelerated evaporation process,and integrate capacities of ultra-stable floating,hindered salt-crystallization,large-scale fabrication for practical purification of seawater and polluted *** raised water surface surrounding evaporators,induced by low density of organogel-phase,results in oil contamination resistance through the lateral capillary repulsion ***,the organogel-phase containing photo-thermal carbon-nanotubes with low thermal capacity and conduction can form locally confined hot dots under solar irradiation and reduce heat dissipation on heating excessive ***,based on this approach,accelerated long-term practical purification of oilcontaminated solutions without any extra disposal is *** other properties of ultra-stable floating,large-scale fabrication,and anti-salt crystallization,these innovative organohydrogel evaporators open pathways for purifying oil-slickpolluted water via interfacial evaporation and are anticipated accelerating industrialization of efficient and sustainable solar-driven water purification.

关键词： solar-driven evaporation organohydrogel anti-oil-fouling thermal management ultra-stable floating

覆膜稻田施用炭基肥对水稻产量及氮素利用的影响

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

中国水稻科学 2024年第5期38卷 567-576页

作者：熊家欢张义凯向镜陈惠哲徐一成王亚梁王志刚姚坚张玉屏中国水稻研究所水稻生物育种全国重点实验室杭州311401 嘉兴市农业科学研究院嘉兴314016

【目的】研究炭基肥及增施生物炭对覆膜水稻产量、氮素利用的影响,以期为水稻覆膜技术可持续发展应用提供理论依据。【方法】以优质粳型常规水稻品种浙禾香2号和籼粳杂交稻甬优538为材料,2021年覆膜机插种植设置CK(不施氮)、T1(施用缓释... 详细信息

【目的】研究炭基肥及增施生物炭对覆膜水稻产量、氮素利用的影响,以期为水稻覆膜技术可持续发展应用提供理论依据。【方法】以优质粳型常规水稻品种浙禾香2号和籼粳杂交稻甬优538为材料,2021年覆膜机插种植设置CK(不施氮)、T1(施用缓释肥)和T2(施用炭基肥)处理。2022年覆膜机插种植设置CK(不施氮)、T2(施用炭基肥)、T3(炭基肥增施6t/hm^(2)生物炭)和T4(炭基肥增施12t/hm^(2)生物炭)处理,研究覆膜稻田施用炭基肥对水稻干物质积累、产量及产量构成和氮素吸收利用的影响。【结果】炭基肥促进了覆膜水稻的生长,提高了覆膜水稻产量。炭基肥显著增加水稻干物质积累量,与T1相比干物质积累显著增加5.40%~29.69%,增施生物炭与T2相比增加了覆膜水稻干物质积累量9.28%~46.91%。浙禾香2号整个生长期效果明显,甬优538在后期作用更显著。与T1相比,炭基肥能显著提高水稻产量3.84%~4.65%。增施生物炭较T2进一步提高了覆膜水稻产量7.97%~15.06%;炭基肥促进了覆膜水稻对氮素的吸收利用,提高水稻氮素利用效率。施用炭基肥显著增加覆膜水稻各生长关键时期的氮素积累量4.87%~31.68%,且氮素积累量随炭基肥增施生物炭量的增加而提高,炭基肥增施12 t/hm2生物炭(T4)氮素积累最高,较施炭基肥(T2)增加11.87%~40.59%。炭基肥降低了覆膜水稻氮素干物质生产率和氮素稻谷生产率,提高了氮肥偏生产力、氮肥农学效率和氮肥吸收利用效率。增施生物炭处理进一步提高氮素利用,减少氮素损失。【结论】覆膜稻田施用炭基肥有利于水稻干物质量和氮素积累量增加,增施生物炭能够进一步提高其效果,从而增加产量,提高氮素利用效率。浙禾香2号增产主要通过增加穗数和每穗粒数,甬优538则通过增加穗数增产,炭基肥增施12t/hm2生物炭增产效果最好。

关键词：覆膜炭基肥产量氮素利用水稻

The role of maize root size in phosphorus uptake and productivity of maize/faba bean and maize/wheat intercropping systems

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(Life Sciences) 2012年第11期55卷 993-1001页

作者： zhang yikai CHEN FanJun LI Long CHEN YanHua LIU BingRan ZHOU YuLing YUAN LiXing zhang FuSuo MI GuoHua Key Laboratory of Plant-Soil Interactions Ministry of EducationCenter for ResourcesEnvironment and Food SecurityCollege of Resources and Environmental ScienceChina Agricultural UniversityBeijing 100193China

Interspecific root/rhizosphere interactions affect phosphorus (P) uptake and the productivity of maize/faba bean and maize/wheat intercropping systems. The aim of these experiments was to determine whether manipulation of maize root growth could improve the productivity of the two intercropping systems. Two near isogenic maize hybrids (the larger-rooted T149 and smaller-rooted T222) were intercropped with faba bean and wheat, under conditions of high- and low-P availability. The larger-rooted T149 showed greater competitive ability than the smaller-rooted T222 in both maize/faba bean and maize/wheat intercropping systems. The higher competitive ability of T149 improved the productivity of the maize/faba bean intercropping system in P-sufficient conditions. In maize/wheat intercropping systems, root growth, shoot biomass, and P uptake of maize were inhibited by wheat, regardless of the P-supply. Compared with T222, the larger-rooted T149 suffered less in the intercropping systems. The total biomass of the maize/wheat intercropping system was higher for wheat/T149 than for wheat/T222 under low-P conditions. These data suggested that genetic improvement of maize root size could enhance maize growth and its ability to compete for P resources in maize/faba bean and maize/wheat intercropping systems. In addition, depending on the P availability, larger maize roots could increase the productivity of intercropping systems.

关键词： faba bean intercropping maize phosphorus uptake root growth wheat

不同光质配比的LED光源补光对水稻机插秧苗生长发育的影响

在线全文

学校读者我要写书评

暂无评论

中国稻米 2024年第1期30卷 58-62页

作者：高义卓向镜叶天承孙凯旋陈惠哲张玉屏张义凯王亚梁王志刚张运波农业农村部长江中游作物绿色高效生产重点实验室(部省共建)/长江大学农学院湖北荆州434025 中国水稻研究所杭州310006

以甬优12和扬两优6号作为试验材料,育秧期间采用纯蓝LED光源、纯红LED光源及红蓝光质各50%配比光源补光,以自然光下育秧为对照,研究不同红蓝光质配比LED光源补光对水稻机插秧苗生长发育的影响。结果表明,不同光质配比的LED光源补光对水... 详细信息

以甬优12和扬两优6号作为试验材料,育秧期间采用纯蓝LED光源、纯红LED光源及红蓝光质各50%配比光源补光,以自然光下育秧为对照,研究不同红蓝光质配比LED光源补光对水稻机插秧苗生长发育的影响。结果表明,不同光质配比的LED光源补光对水稻秧苗生长有显著影响。蓝光能够抑制幼苗株高,提高充实度和根冠比,在培育壮苗方面发挥重要作用。红光处理下的水稻幼苗茎和叶鞘显著伸长,秧苗生长进程加快。此外,参试2个品种经红蓝光处理后的幼苗叶龄显著提高。试验结果探明了使用LED补光处理对水稻幼苗形态的影响,为调控水稻工厂化育秧的光环境提供了科学依据。

关键词：水稻发光二极管(LED) 秧苗素质人工补光

维普期刊数据库博看期刊

基于固定桥式坐标测量机的条码水准标尺校准装置

在线全文

学校读者我要写书评

暂无评论

测绘技术装备 2024年第2期26卷 105-108页

作者：晏浩张益恺黄兴岩君芳冯瑞琪刘鑫山西省检验检测中心山西太原030032

为了校准条码水准标尺,建立了校准装置。校准装置系统由固定桥式三坐标测量机、平面反射镜和数字水准仪构成,经置中调整后,形成精密测量系统,通过平面反射镜将水平放置条码水准标尺转置为垂直立像,并经数字水准仪读取和解码,得到条码尺... 详细信息

为了校准条码水准标尺,建立了校准装置。校准装置系统由固定桥式三坐标测量机、平面反射镜和数字水准仪构成,经置中调整后,形成精密测量系统,通过平面反射镜将水平放置条码水准标尺转置为垂直立像,并经数字水准仪读取和解码,得到条码尺示值,与标准位移值形成数据列,经分段叠加最小二乘拟合,以直线斜率作为被测条码尺的每米真长补偿因子。校准装置实现方式简便,占地空间小,测量精度高,数据评价科学。

关键词：条码水准标尺坐标测量机数字水准仪零点差

Research Progress on Heat Stress of Rice at Flowering Stage

在线全文

学校读者我要写书评

暂无评论

Rice science 2019年第1期26卷 1-10页

作者： WANG Yaliang WANG Lei ZHOU Jianxia HU Shengbo CHEN Huizhe XIANG Jing zhang yikai ZENG Yongjun SHI Qinghua ZHU Defeng zhang Yuping College of Agronomy Jiangxi Agricultural University/Key Laboratory of Crop Physiology Ecology and Genetics BreedingMinistry of Education China National Rice Research Institute/State Key Laboratory of Rice Biology Jinhua Municipal Institute of Agricultural Sciences

Global warming has caused frequent occurrence of heat stress at the flowering stage of single-season rice in the Yangtze River region of China, which results in declines of spikelet fertility and yield in rice. Rice flowering stage is the most sensitive period to high temperatures, and therefore, the key for heat stress happening is the flowering stage coinciding with high temperature, which causes spikelet fertility decreasing in heat-sensitive varieties, and is the major factor for heat injury differences among various rice planting regions. With the development of rice breeding, temperature indexes for heat stress has been converted from daily maximum temperature of 35 oC to 38 oC with the stress duration of more than 3 d. During the flowering stage, anther dehiscence inhibition and low pollen shedding onto the stigma are two main reasons for spikelet fertility reduction under high temperatures. At panicle initiation stage, high temperatures aggravate spikelet degeneration, and destroy floral organ development. Various types of rice varieties coexist in production, and indica-japonica hybrid rice demonstrates the highest heat resistance in general, followed by indica and japonica rice varieties. In production, avoiding high temperature is the main strategy of preventing heat stress, and planting suitable cultivars and adjustment of sowing date are the most effective measures. Irrigation is an effective real-time cultivation measure to decline the canopy temperature during the rice flowering stage. We suggested that further study should be focused on exploring heat injury differences among different rice variety types, and innovating rice-planting methods according to planting system changes in rice planting regions with extreme heat stress. Meanwhile, high temperature monitor and warning systems should be improved to achieve optimal heat stress management efficiencies.

关键词： flowering stage heat stress spikelet fertility high temperature yield variety

Multi-carrier Tb/s silicon photonic coherent receiver

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第1期67卷 284-291页

作者： Zhen WANG Xingfeng LI Jingchi LI Jian SHEN Yong zhang yikai SU State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong University

We propose a silicon polarization-diversity coherent receiver for wavelength-multiplexing transmission without using the large-footprint arrayed waveguide grating(AWG).We have integrated our proposed coherent receiver on the silicon-on-insulator(SOI) platform for high-capacity *** the proposed coherent receiver,high-frequency photocurrent signals from other wavelengths are suppressed by electrical low-pass ***,the signal-signal beat interference(SSBI) generated from each wavelength is eliminated by the balanced *** two features lend to the proposed coherent receiver being free of the mm-scale *** have demonstrated our proposed coherent receiver to detect a 1.12-Tb/s wavelength-division-multiplexed and polarization-division-multiplexed 16-ary quadrature amplitude modulation(PDM-16-QAM) *** compact footprint of the silicon chip promises small-form-factor receivers for future ultra-high-capacity coherent communication systems that require a high integration level and low fabrication cost.

关键词： silicon photonics optical receivers coherent communication wavelength-division-multiplexing (WDM) polarization-division-multiplexing (PDM)

Upcycling municipal solid waste to sustainable hydrogen via two-stage gasification-reforming

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 Energy Chemistry 2024年第9期96卷 611-624页

作者： Hui Zhou Shuzhuang Sun yikai Xu Yeshui zhang Shouliang Yi Chunfei Wu Department of Energy and Power Engineering Tsinghua UniversityBeijing 100084China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001HenanChina Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China School of Engineering University of AberdeenAberdeen AB243UEUK U.S.Department of Energy National Energy Technology LaboratoryPittsburghPA 15236USA School of Chemistry and Chemical Engineering Queen’s University BelfastBelfast BT71NNUK

As global municipal solid waste(MSW)quantities continue to escalate,serious socio-environmental challenges arise,necessitating innovative ***-to-hydrogen(WTH)via two-stage gasification-reforming(TSGR)presents an emergent technology for MSW upcycling,offering to ease waste management burdens and bolster the burgeoning hydrogen *** early initiatives to advance TSGR technology,a cohesive and critical analysis of cutting-edge knowledge and strategies to enhance hydrogen production remains *** review aggregates literature on MSW upcycling to hydrogen via TSGR,with a focus on optimizing process control and catalytic *** underscores technological avenues to augment hydrogen output,curtail catalyst costs,and refine system ***,the review illuminates the potential for integrating chemical and calcium looping into TSGR processes,identifying opportunities,and pinpointing *** review concludes with a summary of the current state of techno-economic analysis for this technology,presenting outstanding challenges and future research directions,with the ultimate goal of transitioning WTH from theoretical to practical application.

关键词： Municipal solidwaste Upcycling Gasification Reforming Hydrogen

钙离子和活性氧在多能干细胞中的功能和调控作用

在线全文

学校读者我要写书评

暂无评论

中国科学：生命科学 2024年第8期54卷 1373-1385页

作者：洪雪君符江琴林东童张旖凯丁浩霖谭天欣李邱致李安琪刘兴国中国科学院广州生物医药与健康研究院广州医科大学-中国科学院广州生物医药与健康研究院联合生命科学学院中国科学院广州生物医药与健康研究院-香港中文大学干细胞与再生医学联合实验室中国科学院广州生物医药与健康研究院-香港大学粤港干细胞及再生医学研究中心中国-新西兰生物医药与健康“一带一路”联合实验室粤港干细胞与再生医学联合实验室广东省干细胞与与再生医学联合实验室广东省干细胞与再生医学重点实验室广州510530 广州医科大学细胞命运调控与疾病粤港澳联合实验室广州511436 中国科学院香港科学创新研究院再生医学与健康中心中国香港999077

多能干细胞具有自我更新和多向分化潜能的特性,是再生医学的研究热点.对多能干细胞的研究有利于理解发育等生理过程以及相关疾病发生机制,有重要的理论研究价值和临床应用前景.钙离子(calcium ions, Ca^(2+))和活性氧(reactive oxygen s... 详细信息

多能干细胞具有自我更新和多向分化潜能的特性,是再生医学的研究热点.对多能干细胞的研究有利于理解发育等生理过程以及相关疾病发生机制,有重要的理论研究价值和临床应用前景.钙离子(calcium ions, Ca^(2+))和活性氧(reactive oxygen species, ROS)是细胞内信号分子,对干细胞的命运调控有重要的功能.正常情况下,一定的ROS水平下会维持干细胞自我更新和促进分化,但过高的ROS水平则会诱发细胞凋亡. Ca^(2+)可通过多种方式参与维持干细胞的自我更新,包括钙依赖的细胞信号通路、细胞周期、表观遗传学修饰等,而钙稳态、钙信号及其水平对于各种类型的干细胞命运决定具有深远的影响.这些结果是推动干细胞领域发展的基础,为生物医学研究和再生医学的进步提供新的机会和角度. Ca^(2+)和ROS在干细胞中的功能和调控作用将继续成为研究和应用的关键焦点.本文将论述ROS, Ca^(2+)如何调控干细胞命运以及研究现状,并展望该领域的未来发展方向.

关键词：活性氧钙离子线粒体表观遗传代谢多能性分化干细胞