检索结果-南通市图书馆

Solar Partial N-burst

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Astronomy and Astrophysics 2003年第4期3卷 381-390页

作者： Zong-junNing Yu-YingLiu qi-junfu fu-YingXu NationalAstronomicalObservatories ChineseAcademyofSciencesBeijing100012 PurpleMountainObservatory ChineseAcademyofSciencesNanjing210008

We present a new sub-class of type Ⅲ solar radio burst at the highfrequencies around 6.0 GHz. In addition to a descending and an ascending branch on the dynamicspectrum, it has an inverted morphology different from the simple type U-burst. We call it 'partialN-burst' because it is interpreted as the known N-burst minus its first branch. The partial N-burstpresented here was detected among a reverse slope type Ⅲ (RS-Ⅲ) burst group prior to the type Ⅴsolar radio continuum and was simultaneously recorded by two spectrometers at the NationalAstronomical Observatories, Chinese Academy of Sciences (NAOC, 5.20-7.60 GHz) and at Purple MountainObservatory (PMO, 4.50-7.50 GHz) on 1999 August 25. After the N-burst and M-burst, the partialN-burst is a third piece of evidence for a magnetic mirror effect in solar radio observation, whenthe same electron is reflected at a pinched foot of a flare loop.

关键词： sun: radio radiation sun: magnetic fields

Flare evolution and polarization changes in fine structures of solar radio emission in the 2013 April 11 event

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2期16卷 69-80页

作者： Gennady Chernov Robert Sych Bao-Lin Tan Yi-Hua Yan Cheng-Ming Tan qi-jun fu Marian Karlicky Valery Fomichev Key Laboratory of Solar Activity National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100012China Pushkov Institute of Terrestrial Magnetism Ionosphere and Radio Wave PropagationRussian Academy of Sciences(IZMIRAN)TroitskMoscow region142190Russia Yunnan Observatories Chinese Academy of SciencesKunming 650011China Institute of Solar-Terrestrial Physics Russian Academy of SciencesSiberian BranchIrkutsk 664033Russia Astronomical Institute of the Academy of Sciences of the Czech Republic Ondrejov 15165Czech Republic

The measurement of positions and sizes of radio sources in observations is important for un- derstanding of the flare evolution. For the first time, solar radio spectral fine structures in an M6.5 flare that occurred on 2013 April 11 were observed simultaneously by several radio instruments at four different observatories： Chinese Solar Broadband Radio Spectrometer at Huairou （SBRS/Huairou）, Ondrejov Radio Spectrograph in the Czech Republic （ORSC/Ondrejov）, Badary Broadband Microwave Spectropolarimeter （BMS/Irkutsk）, and spectrograph/IZMIRAN （Moscow, Troitsk）. The fine structures included microwave zebra patterns （ZPs）, fast pulsations and fiber bursts. They were observed during the flare brightening lo- cated at the tops of a loop arcade as shown in images taken by the extreme ultraviolet （EUV） telescope onboard NASA＇s satellite Solar Dynamics Observatory （SDO）. The flare occurred at 06：58-07：26 UT in solar active region NOAA 11719 located close to the solar disk center. ZPs appeared near high frequency boundaries of the pulsations, and their spectra observed in Huairou and Ondrejov agreed with each other in terms of details. At the beginning of the flare＇s impulsive phase, a strong narrowband ZP burst occurred with a moderate left-handed circular polarization. Then a series of pulsations and ZPs were observed in almost unpolarized emission. After 07：00 UT a ZP appeared with a moderate right-handed polarization. In the flare decay phase （at about 07：25 UT）, ZPs and fiber bursts become strongly right-hand polarized. BMS/Irkutsk spectral observations indicated that the background emission showed a left-handed circular polarization （similar to SBRS/Huairou spectra around 3 GHz）. However, the fine structure appeared in the right-handed polarization. The dynamics of the polarization was associated with the motion of the flare ex- citer, which was observed in EUV images at 171 A and 131 A by the SDO Atmospheric Imaging Assembly （AIA）. Combining magnetograms observed by the SDO Helioseismic and Magnetic Imager （HMI） wi

关键词： Sun activity -- Sun flares -- Sun particle emission -- Sun radio radiation -- zebra-pattern

Solar Radio Bursts in the Period Oct. 22-Nov. 4, 2003

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Astronomy and Astrophysics 2004年第3期4卷 205-208页

作者： Cheng-Ming Tan qi-jun fu Yi-Hua Yan Yu-Ying Liu National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 National Astronomical Observatories Chinese Academy of Science Beijing 100012

A series of solar radio bursts were observed in AR NOAA 10486 with the SolarBroadband (1.1-7.6 GHz) Radio Spectrometers (SBRS of China). Here we analyze four significant eventsassociated with CME events and strong X-ray flares that occurred on 2003 October 22, 26, 27, 29.The Oct. 26 event is a long duration event (LDE) with drift pulsation structure (DPS), narrowbanddm-burst (DCIM), and more than seven types of Fine Structures (FSs); its time of the maximum flux(07:30 UT) is about half an hour later than the X-flare (06:54 UT).

关键词： sun: flares sun: radio radiation sun: fine structures

A New Solar Radio Spectrometer at 1.10-2.06 GHz and First Observational Results

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Astronomy and Astrophysics 2005年第4期5卷 433-441页

作者： Hui-Rong Ji qi-jun fu Yi-Hua Yan Yu-Ying Liu Zhi-jun Chen Cheng-Ming Tan Cong-Ling Cheng De-Bang Lao Shu-Ke Li Zhi-qiang Wang Min-Hong Yu Jian-Nong Liu Li-Kang Zhang Ji-Yong Gao National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Hebei Semiconductor Research Institute Shijiazhuang 050051

An improved Solar Radio Spectrometer working at 1.10-2.06 GHz with much improved spectral and temporal resolution, has been accomplished by the National Astronomical Observatories and Hebei Semiconductor Research Institute,based on an old spectrometer at 1 2 GHz. The new spectrometer has a spectral resolution of 4 MHz and a temporal resolution of 5 ms, with an instantaneous detectable range from 0.02 to 10 times of the quiet Sun flux. It can measure both left and right circular polarization with an accuracy of 10% in degree of polarization. Some results of preliminary observations that could not be recorded by the old spectrometer at 1-2 GHz are presented.

关键词： instrumentation： spectrometer - sun： radio radiation

在线全文

学校读者我要写书评

暂无评论

肛俞穴位麻醉在肛瘘手术中的应用

湖北中医药大学学报 2024年第1期26卷 99-102页

作者：赵建奎闫晓东祁富军空军军医大学第二附属医院陕西西安710038

目的观察肛俞穴位麻醉在肛瘘手术中的应用效果。方法将我院120例肛瘘手术患者依照麻醉方式的不同,将采用中医肛俞穴位麻醉的患者62例纳入肛俞穴位麻醉组,将采用常规局部浸润麻醉的患者58例纳入对照组,比较两组麻醉效果、血流动力学指标... 详细信息

目的观察肛俞穴位麻醉在肛瘘手术中的应用效果。方法将我院120例肛瘘手术患者依照麻醉方式的不同,将采用中医肛俞穴位麻醉的患者62例纳入肛俞穴位麻醉组,将采用常规局部浸润麻醉的患者58例纳入对照组,比较两组麻醉效果、血流动力学指标、肛门松弛度、术中牵拉反应分级、术后疼痛视觉模拟评分法(VAS)评分、不良反应。结果两组麻醉优良率比较差异无统计学意义(P>0.05);肛俞穴位麻醉组手术开始后10 min、术毕动脉压(MAP)和心率(HR)水平低于对照组(P0.05);肛俞穴位麻醉组肛门松弛度优于对照组(P0.05);两组不良反应发生情况比较无统计学差异(P>0.05)。结论相较于常规浸润麻醉,中医肛俞穴位麻醉可更好地维持患者术中血流动力学的稳定,肌松效果较佳,作用时间较长,术后镇痛优势明显,不增加不良反应,不影响患者排尿功能,效果显著,安全性较高。

关键词：肛瘘手术肛俞穴位麻醉应用效果血流动力学术后疼痛

Low Selenium and Low Protein Exacerbate Myocardial Damage in Keshan Disease by Affecting the PINK1/Parkin-mediated Mitochondrial Autophagy Pathway

在线全文

学校读者我要写书评

暂无评论

Current Medical Science 2024年第1期44卷 93-101页

作者： Li-wei ZHANG Hong-qi FENG Song-bo fu Dian-jun SUN Center for Endemic Disease Control Chinese Center for Disease Control and PreventionHarbin Medical UniversityNHC Key Laboratory of Etiology and Epidemiology(Harbin Medical University)Key Lab of Etiology and EpidemiologyEducation Bureau of Heilongjiang ProvinceHarbin 150086China

Objective Keshan disease(KD)is a myocardial mitochondrial disease closely related to insufficient selenium(Se)and protein intake.PTEN induced putative kinase 1(PINK1)/Parkin mediated mitochondrial autophagy regulates various physiological and pathological processes in the body.This study aimed to elucidate the relationship between PINK1/Parkin-regulated mitochondrial autophagy and KD-related myocardial injury.Methods A low Se and low protein animal model was established.One hundred Wistar rats were randomly divided into 5 groups(control group,low Se group,low protein group,low Se+low protein group,and corn from KD area group).The JC-1 method was used to detect the mitochondrial membrane potential(MMP).ELISA was used to detect serum creatine kinase MB(CK-MB),cardiac troponin I(cTnI),and mitochondrial-glutamicoxalacetic transaminase(M-GOT)levels.RT-PCR and Western blot analysis were used to detect the expression of PINK1,Parkin,sequestome 1(P62),and microtubule-associated proteins1A/1B light chain 3B(MAP1LC3B).Results The MMP was significantly decreased and the activity of CK-MB,cTnI,and M-GOT significantly increased in each experimental group(low Se group,low protein group,low Se+low protein group and corn from KD area group)compared with the control group(P<0.05 for all).The mRNA and protein expression levels of PINK1,Parkin and MAP1LC3B were profoundly increased,and those of P62 markedly decreased in the experimental groups compared with the control group(P<0.05 for all).Conclusion Low Se and low protein levels exacerbate myocardial damage in KD by affecting the PINK1/Parkin-mediated mitochondrial autophagy pathway.

关键词： Keshan disease low selenium and low protein myocardial mitochondrial injury PTEN induced putative kinase 1(PINK1)/Parkin mitochondrial autophagy

Solar evaporation for simultaneous oil-water separation and electricity generation with Janus wood-based absorbers

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

Frontiers of Environmental Science & Engineering 2024年第2期18卷 13-23页

作者： Yue Yang Ze fu qi Zhang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science&TechnologyNanjing 210094China Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresCollege of Engineering and Applied SciencesKey Laboratory of Intelligent Optical Sensing and Manipulation(Ministry of Education)Jiangsu Key Laboratory of Artificial Functional MaterialsNanjing UniversityNanjing 210093China

Oily wastewater from ocean oil spills endangers marine ecosystems and human health. Therefore, developing an effective and sustainable solution for separating oil-water mixtures is urgent. Interfacial solar photothermal evaporation is a promising approach for the complete separation of two-phase mixtures using only solar energy. Herein, we report a carbonized wood-based absorber with Janus structure of comprising a hydrophobic top-layer and an oleophobic bottom-layer for simultaneous solar-driven oil-water separation and electricity generation. Under sunlight irradiation, the rapid evaporation of seawater will induce a separation of oil-water mixtures, and cause a high salt concentration region underlying the interface, while the bottom “bulk water” maintains in a low salt concentration, thus forming a salinity gradient. Electricity can be generated by salinity gradient power. Therefore, oil-water separation efficiency of > 99% and derived extra electricity power of ~0.1 W/m2 is achieved under solar radiation, demonstrating the feasibility of oil-water separation and electricity production synchronously directly using solar energy. This work provides a green and cost-effective path for the separation of oil-water mixtures.

关键词： Oily wastewater Carbonized wood Salinity gradient Electricity generation Solar irradiation

Differences and identification on multi-time hydrocarbon generation of carboniferous-permian coaly source rocks in the Huanghua Depression,Bohai Bay Basin

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

Petroleum Science 2024年第2期21卷 765-776页

作者： Jin-jun Xu Xian-Gang Cheng Shu-Nan Peng jun-Cai Jiang qi-Long Wu Da Lou fu-qi Cheng La-Mei Lin National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580ShandongChina PetroChina Dagang Oilfield Company Tianjin300280China

Coal is a solid combustible mineral,and coal-bearing strata have important hydrocarbon generation potential and contribute to more than 12%of the global hydrocarbon resources.However,the deposition and hydrocarbon evolution process of ancient coal-bearing strata is characterized by multiple geological times,leading to obvious distinctions in their hydrocarbon generation potential,geological processes,and production,which affect the evaluation and exploration of hydrocarbon resources derived from coaly source rocks worldwide.This study aimed to identify the differences on oil-generated parent macerals and the production of oil generated from different coaly source rocks and through different oil generation processes.Integrating with the analysis of previous tectonic burial history and hydrocarbon generation history,high-temperature and high-pressure thermal simulation experiments,organic geochemistry,and organic petrology were performed on the Carboniferous-Permian(C-P)coaly source rocks in the Huanghua Depression,Bohai Bay Basin.The oil-generated parent macerals of coal's secondary oil generation process(SOGP)were mainly hydrogen-rich collotelinite,collodetrinite,sporinite,and cutinite,while the oil-generated parent macerals of tertiary oil generation process(TOGP)were the remaining small amount of hydrogen-rich collotelinite,sporinite,and cutinite,as well as dispersed soluble organic matter and unexhausted residual hydrocarbons.Compared with coal,the oil-generated parent macerals of coaly shale SOGP were mostly sporinite and cutinite.And part of hydrogen-poor vitrinite,lacking hydrocarbon-rich macerals,and macerals of the TOGP,in addition to some remaining cutinite and a small amount of crude oil and bitumen from SOGP contributed to the oil yield.The results indicated that the changes in oil yield had a good junction between SOGP and TOGP,both coal and coaly shale had higher SOGP aborted oil yield than TOGP starting yield,and coaly shale TOGP peak oil yield was lower than SOGP peak oil yield.There were significa

关键词： Thermal simulation Multi-time oil generation processes Coaly source rock Carboniferous-permian Huanghua Depression

Circadian disturbance induces erectile dysfunction by impairing endothelial function

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2024年第2期26卷 205-211页

作者： Tao Li Yi-Ting Jiang Xin-Zhu qi Peng Chen jun-Hao Zhang fu Luo jun qiao Jiang Gu Guang-Shi Du qiang Wang Department of Urology Affiliated Hospital of Guizhou Medical UniversityGuiyang 550004China Department of Urology Guizhou Provincial People's HospitalGuiyang 550002China Department of Otorhinolaryngology Affiliated Hospital of Guizhou Medical UniversityGuiyang 550004China Guizhou Institute for Food and Drug Control Guiyang 550004China Department of Reproductive Center Guizhou Provincial People's HospitalGuiyang 550002China Translational Medicine Research Center of Guizhou Medical University Guiyang 550025China

In order to explore the impact of circadian disturbance on erectile function,we randomly divided 24 adult male rats into groups of control(light on at 8:00 a.***.and off at 8:00 p.m.),dark/dark(DD;constant dark),light/light(LL;constant light),and shift dark/light(DL;light off at 8:00 a.***.and on at 8:0o p.m.).Four weeks later,erectile function was measured and corpora cavernosa were harvested for analysis.The maximum intracavernous pressure(mlcP)and mCP/mean arterial pressure(MAP)ratio in the DD,LL,and DL groups were significantly lower than that in the control group.The LL and DL groups showed significantly attenuated endothelial nitric oxide synthase(eNOS),while DD,LL,and DL showed reduced neuronal nitric oxide synthase(nNOS)at both mRNA and protein levels.The production of nitric oxide(NO)and cyclic guanosinemonophosphate(cGMP)was inhibited by altered light/dark cycles to varying degrees.Circadian disturbance impaired endothelial function and contributed to erectile dysfunction.For the core circadian elements,mRNA expression of circadian locomotor output cycles kaput(Clock)and brain/muscle aryl-hydrocarbon receptor nuclear translocator-like protein 1(Bmal1)was elevated in the DL group,but their protein expression was not significantly changed.DD,LL,and DL increased period 1(Per1)and Per3 levels,while LL and DL increased PER1 levels.No significant difference was found for Per2levels,and PER2 and PER3 concentrations were not significantly changed.Moreover,LL and DL significantly increased cryptochrome-1(CRY1)and CRY2 at both mRNA and protein levels.The altered light/dark rat model showed that circadian disturbance contributed to erectile dysfunction probably by impairing endothelial function.Meanwhile,the core circadian elements were detected in the corpora cavernosa,but these were disrupted.However,which circadian element regulates erectile function and how it works need further analysis.

关键词： circadian disturbance endothelial function erectile function light/dark cycle NO/cGMP