检索结果-南通市图书馆

有机肥替代化肥氮对谷子氮素累积、产量及品质的影响

在线全文

学校读者我要写书评

暂无评论

作物学报 2025年第1期51卷 149-160页

作者：王媛许佳茵董二伟王劲松刘秋霞黄晓磊焦晓燕山西农业大学资源环境学院山西太原030031

有机肥部分替代化肥是一种实现化肥减量的可持续农业生产措施。本研究于2020和2021连续2年以“沁黄2号”为供试材料,设不施氮(CK)、常量化肥氮(NPK)、有机肥替代25%化肥氮(25%M)、有机肥替代50%化肥氮(50%M)、有机肥替代75%化肥氮(75%M... 详细信息

有机肥部分替代化肥是一种实现化肥减量的可持续农业生产措施。本研究于2020和2021连续2年以“沁黄2号”为供试材料,设不施氮(CK)、常量化肥氮(NPK)、有机肥替代25%化肥氮(25%M)、有机肥替代50%化肥氮(50%M)、有机肥替代75%化肥氮(75%M)和有机肥替代100%化肥氮(100%M) 6个处理,研究不同替代率对谷子产量构成和氮素吸收的影响,并分析氮素吸收调控小米米色、糊化特性和类胡萝卜素组分的效应,明确谷子生产中有机肥最佳替代率。结果表明,2年中较低的有机肥替代化肥氮率显著提高了谷子植株氮素累积,但随着替代率的持续增加,植株氮素累积量呈降低趋势,最终影响谷子产量和小米品质。2020年, 25%M处理显著提高了谷子地上部氮素累积量,较NPK处理提高9.6%;2021年,25%M处理谷子地上部氮素累积量、生物量、穗粒数和产量达到最高,较NPK处理分别提高6.1%、12.0%、15.4%和12.0%。50%M处理显著影响了小米的米色、糊化特征和类胡萝卜素含量,与NPK相比,小米籽粒红绿值、橘色值、支链淀粉含量、总淀粉含量、小米糊化最终黏度、叶黄素含量、玉米黄质含量和黄色素含量的增幅分别可达6.0%、6.0%、7.4%、4.3%、7.8%、20.7%、17.4%和2.8%。但有机肥完全替代化肥降低了谷子地上部氮素吸收、地上部生物量、穗粒数及谷子产量,也抑制了小米叶黄素和玉米黄质含量的提升。2年均表现出谷子地上部氮吸收量与小米单粒重、直链淀粉含量和小米糊化回升值呈显著的负相关。且2021年谷子地上部氮吸收量还与小米总淀粉含量、蛋白质含量、小米粉糊化峰值黏度和小米黄色素含量呈显著的负相关,与小米糊化峰谷黏度呈显著的正相关。综上,施氮总量120 kg hm^(–2)下,有机肥替代25%~50%化肥氮能通过促进植株氮素的吸收,实现产量、米色、蒸煮特性及类胡萝卜素的协同提升,为谷子化肥减量和提质增效生产提供技术支撑。

关键词：谷子有机肥替代化肥氮率氮素累积产量米色糊化特性类胡萝卜素

Effects of Sirt1 on proliferation,migration,and apoptosis of endothelial progenitor cells in peripheral blood of SD rats with chronic obstructive pulmonary disease

同方期刊数据库

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

Asian Pacific Journal of Tropical Biomedicine 2021年第10期11卷 429-439页

作者： dong-Mei sun jin-Jian yao Zhan-Ling dong jin Qian Qi-Feng huang yuan-Tian sun xiao-Ran Liu The First Affiliated Hospital of Hainan Medical University HaikouChina Emergency Center of Hainan General Hospital Affiliated to Hainan Medical University HaikouChina Hainan Medical University HaikouChina Shandong Heze Mudan People's Hospital HezeChina

Objective:To explore the effect of Sirt1 on the function of endothelial progenitor cells(EPCs)in rats with chronic obstructive pulmonary disease(COPD).Methods:A rat COPD model was established via smoking and endotoxin administration for three *** peripheral circulating EPCs were isolated by gradient centrifugation,and their functions,cell cycle distribution,apoptosis,and Sirt1 expression were *** function changes of EPCs in the presence or absence of Sirt1 agonist and inhibitor were estimated;meanwhile,the expressions of Sirt1,FOXO3a,NF-κB,and p53 were also ***:The proliferation,adhesion,and migration of EPCs decreased while the apoptosis rate was increased in the COPD *** expression of Sirt1 protein in EPCs of the COPD group was significantly lower than that in the control group(P<0.01).The overexpression of the Sirt1 gene using a gene transfection technique or Sirt1 agonists(SRT1720)improved the proliferation,migration,and adhesion,and decreased the apoptosis of ***,Sirt1 inhibitor(EX527)decreased EPC functions in the COPD *** effect of Sirt1 expression on EPC function may be related to reduction of FOXO3a and increase of NF-κB and p53 ***:Increased expression of Sirt1 can improve the proliferation and migration of EPCs and reduce their apoptosis in COPD *** change may be related to FOXO3a,NF-κB,and p53 signaling pathways.

关键词： Chronic obstructive pulmonary disease Endothelial progenitor cells Sirt1 Proliferation Migration Adhesion Apoptosis FOXO3a NF-κB p53 Rat

3D magnetic field guided sunflower-like nanocatalytic active swarm targeting patients-derived organoids

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 2023年第1期16卷 1021-1032页

作者： dong Liu Ruirui Guo Shuangshuang Mao yanjie huang Bin Wang Zijian Wu Xuanjie xia Jian dong Yu Xin Ruiyang Xie Jianzhong Shou Wei sun yuan Pang yuan Lu Key Laboratory of Industrial Biocatalysis Ministry of EducationDepartment of Chemical EngineeringTsinghua UniversityBeijing 100084China Tianjin Industrial Microbiology Key Laboratory College of BiotechnologyTianjin University of Science and TechnologyTianjin 300457China Biomanufacturing Center Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Biomanufacturing Center Dept.of Mechanical EngineeringTsinghua UniversityBeijing 100084China

nanocatalytic medicine triggering in situ catalytic reactions has been considered as a promising strategy for tumor-selective ***,the targeted distribution of nanocatalysts was still low,considering the absence of targeting propulsion ***,encouraged by the fast-developing controllable microrobotics for targeting delivery,a sunflower-like nanocatalytic active swarm(SNCAS)controlled by a three-dimensional(3D)magnetic field was proposed for synergistic tumorselective and magnetic-actively tumor-targeting ***,a patient-derived renal cancer cell 3D organoid was utilized for the verification of the effective tumor therapeutic *** the targeted control of 3D magnetic field,the multiple cascade catalytic efficiency of SNCAS based on Fenton reaction was evaluated,resulting in efficient tumor cell apoptosis and *** the patient-derived organoid treatment,the SNCAS presented significant lethality toward 3D organoid structure to induce cell apoptosis with the collapse of organoid *** targeting efficiency was further enhanced under the magnetic-controllable of ***,empowered by the magnetic control technology,the synergistic therapeutic strategy based on controllable swarm combined active targeting and tumor-specific catalytic nanomedicine has provided a novel way for advanced cancer ***,3D patient-derived organoids were proved as a powerful tool for the effectiveness verification of nanocatalytic medicine.

关键词： nanocatalytic swarm magnetic control patients-derived organoids

Signal Clipping at Transmitter and Receiver of O-OFDM for VLC under Optical Power Constraint

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

China Communications 2022年第6期19卷 154-168页

作者： Liang xia xiaoqian Wang Zhiwen sun Zhitian Cheng jing jin Yifei yuan Guangyi Liu Tao Jiang Yuhong huang Future Mobile Technology Lab China Mobile Research InstituteBeijing 100053China

Visible light communications(VLC)is considered as an effective supplement technology for next-generation(6G)communications due to its abundant spectrum,high power efficiency and easy *** orthogonal frequency division multiplexing(O-OFDM)is a common technology to obtain further *** this paper,two typical O-OFDM schemes direct current biased O-OFDM(DCO-OFDM)and asymmetrically clipped O-OFDM(ACO-OFDM)are analyzed in terms of signal clipping at both transmitter and receiver under the constraints of maximum optical power and non-negative optical *** effective electrical SNR models after signal clipping are proposed and verified by link *** a noise cancellation scheme is proposed based on received signal clipping and is proved to bring a significant gain for *** system simulation,we find that under a certain optical power limitation,most users can achieve above 4 Gbps in indoor scenario when modulation bandwidth of the light emit diode(LED)or laser diode(LD)is 1 ***,it can be expected that the throughput could reach tens Gbps when the LED/LD modulation bandwidth is increased and multiple LEDs/LDs are deployed.

关键词： 6G visible light communications optical orthogonal frequency division multiplexing clipping bit error rate throughput

Einstein Probe discovery of EP240408a: A peculiar X-ray transient with an intermediate timescale

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 222-240页

作者： Wenda Zhang Weimin yuan Zhixing Ling Yong Chen nanda Rea Arne Rau Zhiming Cai Huaqing Cheng Francesco Coti Zelati Lixin Dai jingwei Hu Shumei Jia Chichuan jin dongyue Li Paul O’Brien Rongfeng Shen Xinwen Shu Shengli sun xiaojin sun xiaofeng Wang Lei yang Bing Zhang Chen Zhang Shuang-nan Zhang Yonghe Zhang Jie An David Buckley Alexis Coleiro Bertrand Cordier Liming Dou Rob Eyles-Ferris Zhou Fan Hua Feng Shaoyu Fu Johan P.U.Fynbo Lluis Galbany Saurabh W.Jha Shuaiqing Jiang Albert Kong Erik Kuulkers Weihua Lei Wenxiong Li Bifang Liu mingjun Liu Xing Liu yuan Liu Zhu Liu Chandreyee Maitra Alessio Marino Itumeleng Monageng Kirpal nandra Jeremy Sanders Roberto Soria Lian Tao Junfeng Wang Song Wang Tinggui Wang Zhongxiang Wang Qingwen Wu Xuefeng Wu dong Xu yanjun Xu Suijian Xue Yongquan Xue Zijian Zhang Zipei Zhu Hu Zou Congying Bao Fansheng Chen Houlei Chen Tianxiang Chen Wei Chen Yehai Chen Yifan Chen Chenzhou Cui Weiwei Cui yanfeng Dai dongwei Fan Ju Guan Dawei Han dongjie Hou Haibo Hu Maohai huang Jia Huo Zhenqing Jia Bowen Jiang Ge jin Chengkui Li Junfei Li Longhui Li Maoshun Li Wei Li Zhengda Li Tianying Lian Congzhan Liu Heyang Liu Huaqiu Liu Fangjun Lu Laidan Luo Jia Ma Xuan Mao Haiwu Pan Xin Pan Liming Song Hui sun Yunyin Tan Qingjun Tang Yihan Tao Hao Wang Juan Wang Lei Wang Wenxin Wang Yilong Wang Yusa Wang Qinyu Wu Haitao Xu jingjing Xu Xinpeng Xu Yunfei Xu Zhao Xu Changbin Xue Yulong Xue Ailiang yan Haonan yang Xiongtao yang yanji yang Juan Zhang Mo Zhang Wenjie Zhang Zhen Zhang Zhen Zhang Ziliang Zhang donghua Zhao Haisheng Zhao xiaofan Zhao Zijian Zhao Hongyan Zhou Yilin Zhou Yuxuan Zhu Zhencai Zhu National Astronomical Observatories Chinese Academy of Sciences School of Astronomy and Space Sciences University of Chinese Academy of Sciences Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Institute of Space Sciences (ICE) CSIC Institut d’Estudis Espacials de Catalunya (IEEC) Max Planck Institute for Extraterrestrial Physics Innovation Academy for Microsatellites Chinese Academy of Sciences Department of Physics University of Hong Kong School of Physics and Astronomy University of Leicester School of Physics and Astronomy sun yat-sen University Department of Physics Anhui Normal University Shanghai Institute of Technical Physics Chinese Academy of Sciences Physics Department Tsinghua University Nevada Center for Astrophysics University of Nevada Las Vegas Department of Physics and Astronomy University of Nevada Las Vegas South African Astronomical Observatory Department of Astronomy University of Cape Town Department of Physics University of the Free State Université Paris Cité CNRS Astroparticule et Cosmologie Université Paris Cité CEA Paris-Saclay IRFU/DAp-AIM Department of Astronomy Guangzhou University Cosmic Dawn Center (DAWN) Niels Bohr Institute University of Copenhagen Department of Physics and Astronomy Rutgers the State University of New Jersey Institute for Cosmic Ray Research The University of Tokyo ESA/ESTEC Department of Astronomy School of Physics Huazhong University of Science and Technology INAF-Osservatorio Astrofisico di Torino Sydney Institute for Astronomy School of Physics The University of Sydney Department of Astronomy xiamen University Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University Department of Astronomy University of Science and Technology School of Astronomy and Space Sciences University of Science and Technology of China Institute of Deep Space Sciences Deep Space Exploration Laboratory Department of Astronomy School of Physics and Astronomy Yunnan University Shanghai Astronomical Observatory Chi

We report the discovery of a peculiar X-ray transient,EP240408a,by Einstein Probe （EP） and follow-up studies made with EP,Swift,NICER,GROND,ATCA and other ground-based multiwavelength *** new transient was first detected with Wide-field X-ray Telescope （WXT） on board EP on April 8th,2024,manifested in an intense yet brief X-ray flare lasting for *** flare reached a peak flux of 3.9×10-9erg cm-2s-1in 0.5-4 ke V,～300 times brighter than the underlying X-ray emission detected throughout the *** and more precise follow-up observations by EP/FXT,Swift and NICER confirmed the finding of this new *** X-ray spectrum is non-thermal in 0.5-10 ke V,with a power-law photon index varying *** X-ray light curve shows a plateau lasting for ～4 d,followed by a steep decay till becoming undetectable ～10 d after the initial *** on its temporal property and constraints from previous EP observations,an unusual timescale in the range of 7-23 d is found for EP240408a,which is intermediate between the commonly found fast and long-term *** counterparts have been found in optical and near-infrared,with the earliest observation at 17 h after the initial X-ray detection,suggestive of intrinsically weak emission in these *** demonstrate that the remarkable properties of EP240408a are inconsistent with any of the transient types known so far,by comparison with,in particular,jetted tidal disruption events,gamma-ray bursts,X-ray binaries and fast blue optical *** nature of EP240408a thus remains an *** suggest that EP240408a may represent a new type of transients with intermediate timescales of the order of～10 *** detection and follow-ups of more of such objects are essential for revealing their origin.

关键词： X-ray transients ${\bm~{Einstein~~Probe}}$

Effect of terahertz pulse on gene expression in human eye cells

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2019年第4期28卷 401-407页

作者： jin-Wu Zhao ming-xia He Li-Jie dong Shao-xian Li Li-yuan Liu Shao-Chong Bu Chun-Mei Ouyang Peng-Fei Wang Long-Ling sun School of Precision Instrument and Opto-electronics Engineering The Center for Terahertz Waves Tianjin University State Key Laboratory of Precision Measuring Technology and Instruments Tianjin University Eye Institute and School of Optometry and Ophthalmology Tianjin Medical University Eye Hospital Key Laboratory of Opto-electronics Information Technology and Technical Science Ministry of Education Tianjin University

In recent years, the advances in terahertz applications have stimulated interest in the biological effects associated with this frequency range. We study the gene expression profile in three types of cells exposed to terahertz radiation,i.e., human ARPE-19 retinal pigment epithelial cells, simian virus 40-transformed human corneal epithelial cells, and human MIO-M1 Müller cells. We find that the gene expression in response to heat shock is unaffected, indicating that the minimum temperature increases under controlled environment. The transcriptome sequencing survey demonstrates that 6-hour irradiation with a broadband terahertz source results in specific change in gene expression and also the biological functions that are closely related to these genes. Our results imply that the effect of terahertz radiation on gene expression can last over 15 hours and depends on the type of cell.

关键词： terahertz radiation eye cells gene expression

Damping and power spectra of quasi-periodic intensity disturbances above a solar polar coronal hole

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2016年第6期16卷 85-92页

作者： Fang-Ran Jiao Li-dong xia Zheng-Hua huang Bo Li Hui Fu Ding yuan Kalugodu Chandrashekhar Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space Sciences Shandong University Weihai 264209 Shandong China Jeremiah Horrocks Institute University of Central Lancashire Preston PR1 2HE UK

We study intensity disturbances above a solar polar coronal hole that can be seen in the AIA 171 and 193 ＆ passbands, aiming to provide more insights into their physical nature. The damping and power spectra of the intensity disturbances with frequencies from 0.07 mHz to 10.5 mHz are investigated. The damping of the intensity disturbances tends to be stronger at lower frequencies, and their damping behavior below 980＂（for comparison, the limb is at 945＂） is different from what happens above. No significant difference is found between the damping of the intensity disturbances in the AIA 171 ~ and that in the AIA 193 ]k. The indices of the power spectra of the intensity disturbances are found to be slightly smaller in the AIA 171/~ than in the AIA 193 ~, but the difference is within one standard deviation. An additional enhanced component is present in the power spectra in a period range of 8-40 min at lower heights. The power spectra of a spicule is highly correlated with its associated intensity disturbance, which suggests that the power spectra of the intensity disturbances might be a mixture of spicules and wave activities. We suggest that each intensity disturbance in the polar coronal hole is possibly a series of independent slow magnetoacoustic waves triggered by spicular activities.

关键词： sun: corona- sun: waves -- sun: turbulence -- method: observational

Electroacupuncture improves learning and memory functions in a rat cerebral ischemia/reperfusion injury model through PI3K/Akt signaling pathway activation

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2021年第6期16卷 1011-1016页

作者： Hui-Ling Wang Fei-Lai Liu Rui-Qing Li ming-Yue Wan Jie-Ying Li jing Shi ming-Li Wu Jun-Hua Chen Wei-Juan sun Hong-xia Feng Wei Zhao jin huang Ren-Chao Liu Wen-Xue Hao xiao-dong Feng Rehabilitation Center the First Affiliated Hospital of Henan University of Traditional Chinese MedicineZhengzhouHenan ProvinceChina Department of Rehabilitation Medicine Fujian University of Chinese MedicineFuzhouFujian ProvinceChina Department of Rehabilitation Medicine Henan University of Chinese MedicineZhengzhouHenan ProvinceChina

Electroacupuncture has been widely used to treat cognitive impairment after cerebral ischemia,but the underlying mechanism has not yet been fully *** have shown that autophagy plays an important role in the formation and development of cognitive impairment,and the phosphoinositide 3-kinase(PI3K)/Akt signaling pathway plays an important role in autophagy *** investigate the role played by the PI3K/Akt signaling pathway in the electroacupuncture treatment of cerebral ischemia/reperfusion rat models,we first established a rat model of cerebral ischemia/reperfusion through the occlusion of the middle cerebral artery using the suture *** at 2 hours after modeling,electroacupuncture was delivered at the Shenting(GV24)and Baihui(GV20)acupoints,with a dilatational wave(1-20 Hz frequency,2 mA intensity,6 V peak voltage),for 30 minutes/day over 8 consecutive *** results showed that electroacupuncture reduced the infarct volume in a rat model of cerebral ischemia/reperfusion injury,increased the mRNA expression levels of the PI3K/Akt signaling pathwayrelated factors Beclin-1,mammalian target of rapamycin(mTOR),and PI3K,increased the protein expression levels of phosphorylated Akt,Beclin-1,PI3K,and mTOR in the ischemic cerebral cortex,and simultaneously reduced p53 mRNA and protein expression *** the Morris water maze test,the latency to find the hidden platform was significantly shortened among rats subjected to electroacupuncture stimulation compared with rats without electroacupuncture *** the spatial probe test,the number of times that a rat crossed the target quadrant was increased in rats subjected to electroacupuncture stimulation compared with rats without electroacupuncture *** stimulation applied to the Shenting(GV24)and Baihui(GV20)acupoints activated the PI3K/Akt signaling pathway and improved rat learning and memory *** study was approved by the Animal Ethics Committee

关键词： acupuncture brain central nervous system factor neurological function pathways protein stroke

Potentiation of the lateral habenula-ventral tegmental area pathway underlines the susceptibility to depression in mice with chronic pain

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2024年第1期67卷 67-82页

作者： Chun-Kui Zhang Pan Wang yuan-yuan Ji Jian-Shuai Zhao Jun-xiang Gu xian-xia yan Hong-Wei Fan ming-ming Zhang Yu Qiao xiao-Die Liu Bao-Juan Li ming-Hui Wang Hai-Long dong Hao-Hong Li Peng-Cheng huang Yun-Qing Li Wu-Gang Hou jin-Lian Li Tao Chen Department of Anatomy and K.K.Leung Brain Research Centre Fourth Military Medical UniversityXi’an 710032China Beijing Institute of Basic Medical Sciences Beijing 100850China Key Laboratory of Ministry of Public Health for Forensic Science Xi’an Jiaotong UniversityXi’an 710061China Department of Anesthesiology Xijing HospitalFourth Military Medical UniversityXi’an 710032China Department of Neurosurgery the Second Affiliated Hospital of Xian Jiaotong UniversityXi’an 710004China School of Biomedical Engineering Fourth Military Medical UniversityXi’an 710032China Affiliated Mental Health Centre and Hangzhou Seventh People’s Hospital Zhejiang University School of MedicineHangzhou 310013China The MOE Frontier Research Center of Brain&Brain-machine Integration Zhejiang University School of Brain Science and Brain MedicineHangzhou 310058China Department of Neurology The First Affiliated Hospital of Nanchang UniversityNanchang 330006China Department of Anatomy School of MedicineNorthwest UniversityXi’an 710069China

Chronic pain often develops severe mood changes such as ***,how chronic pain leads to depression remains elusive and the mechanisms determining individuals’responses to depression are largely *** we found that depression-like behaviors could only be observed in 67.9%of mice with chronic neuropathic pain,leaving 32.1%of mice with depression *** determined that the spike discharges of the ventral tegmental area(VTA)-projecting lateral habenula(LHb)glutamatergic(Glu)neurons were sequentially increased in sham,resilient and susceptible mice,which consequently inhibited VTA dopaminergic(DA)neurons through a LHbGlu-VTAGABA-VTADA ***,the LHbGlu-VTADA excitatory inputs were dampened via GABAB receptors in a pre-synaptic *** of LHb-VTA pathway largely affected the development of depressive symptoms caused by chronic *** study thus identifies a pivotal role of the LHb-VTA pathway in coupling chronic pain with depression and highlights the activity-dependent contribution of LHbGlu-to-VTADA inhibition in depressive behavioral regulation.

关键词： chronic pain depression lateral habenula ventral tegmental area dopamine susceptibility