检索结果-南通市图书馆

“10 m半径一站式抢救单元”救治急性胸痛患者1例

在线全文

学校读者我要写书评

暂无评论

岭南心血管病杂志 2019年第6期25卷 704-706页

作者：杨醒于佳雪刘小剑杨航周颖玲董豪坚广东省人民医院珠海医院心内科广东珠海519090 广东省心血管病研究所心内科广东省人民医院(广东省医学科学院) 广州510080

1病例资料患者,男性,69岁,因“腰背痛伴晕厥1.5 h”由120送至广东省人民医院珠海医院急诊。既往可疑原发性高血压(高血压)病史。家属代诉患者于1.5 h前走路时突发腰背部剧烈疼痛,伴头晕、黑曚,摔倒在地,无晕厥、胸痛、咯血等,家属到场... 详细信息

1病例资料患者,男性,69岁,因“腰背痛伴晕厥1.5 h”由120送至广东省人民医院珠海医院急诊。既往可疑原发性高血压(高血压)病史。家属代诉患者于1.5 h前走路时突发腰背部剧烈疼痛,伴头晕、黑曚,摔倒在地,无晕厥、胸痛、咯血等,家属到场后呼叫120送至我院急诊,并直接送入胸痛抢救室。

关键词：胸痛单元急性胸痛冠状动脉疾病胸痛三联征计算机断层扫描血管造影

Herscovici’s Conjecture on the Product of the Thorn Graphs of the Complete Graphs

在线全文

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2014年第2期2卷 263-269页

作者： dong-Lin hao Ze-Tu Gao jian-Hua Yin Department of Mathematics College of Information Science and TechnologyHainan UniversityHaikou 570228China

Given a distribution of pebbles on the vertices of a connected graph G,a pebbling move on G consists of taking two pebbles off one vertex and placing one on an adjacent *** t-pebbling number f_(t)(G)of a simple connected graph G is the smallest positive integer such that for every distribution of fteGT pebbles on the vertices of G,we can move t pebbles to any target vertex by a sequence of pebbling *** conjectured that for any connected graphs G and H,f_(1)(G×H)≤f1(G)f1(H).Herscovici further conjectured that fst(G×H)≤6 fseGTfteHT for any positive integers s and *** et al.(Discret Math,309:3431–3435,2009)proved that Graham’s conjecture holds when G is a thorn graph of a complete graph and H is a graph having the 2-pebbling *** this paper,we further show that Herscovici’s conjecture is true when G is a thorn graph of a complete graph and H is a graph having the 2t-pebbling property.

关键词： Thorn graph t-Pebbling number Graham’s conjecture Herscovici’s conjecture

Organocatalytic Domino Michael/cyclization for the synthesis of highly substituted 4, 5-dihydrothiophenes

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

Chinese Chemical Letters 2018年第3期29卷 517-520页

作者： Chen-hao Ding jian-Lian dong Li-Si-Han Yu jian-Wu Xie Department of Chemistry and Life science Zhejiang Normal University Jinhua 321004 China

Based on an umpolung strategy, a series of novel full substituted, optically active dihydrothiophenes, which contain several functional groups, such as amine, ester and oxime groups, were obtained via an efficient org... 详细信息

关键词： Dihydrothiophenes Organocatalysis 1 3-Dicarbonyl compounds Thioamides Nitrostyrenes

Hot corrosion behavior and mechanism of FGH96 P/M superalloy in molten NaCl–Na_2SO_4 salts

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2019年第2期38卷 173-180页

作者： He jiang jian-Xin dong Mai-Cang Zhang Lei Zheng Zhi-hao Yao Materials Science and Engineering University of Science and Technology Beijing

Hot corrosion behavior of FGH96 powder metallurgy(P/M) superalloy in 25 % NaCl + 75 % Na_2SO_4 molten salts at 650, 700, and 750 ℃ was investigated in this paper. The methods of mass loss measurement, X-ray diffraction(XRD), scanning electron microscopy(SEM),and energy-dispersive spectroscopy(EDS) were used *** experimental results show that hot corrosion kinetics follows a square power law at 650 ℃, while a linear one at 700 and 750 ℃. The corrosion layer is detected to be composed of Cr_2O_3, NiO, and Ni2S_3 at each *** cross-sectional morphologies and corresponding elemental maps indicate that the corrosion layer is a stratified structure of oxide and sulfide. The results and analyses confirm that the hot corrosion mechanism of FGH96 P/M superalloy is a cooperate process of oxidation and sulfidation. Furthermore, the relatively higher concentrations of Cr, Co, and Ti provide better corrosion resistance to the attack of S and Cl^-.

关键词： Nickel-based superalloy FGH96 Hot corrosion Molten salts

Effects of Ta on the solidification behavior and microstructure of a rhenium-containing hot corrosion resistant single crystal

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2019年第7期26卷 901-907页

作者： Shi-hua Ma Hong-quan hao dong Wang Lang-hong Lou jian Zhang Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China School of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 China National Natural Science Foundation of China Beijing 100085 China

The effects of Ta on the solidification microstructure of the Re-containing hot corrosion resistant Ni-base single crystal were investigated. Results showed that Ta addition significantly modified the solidification behavior and further influenced the as-cast microstructure. Ta addition changed the solidification characteristic temperatures and decreased the segregation of refractory elements (Re and W) as well as increased the solidification temperature range from 39.0 to 61.8℃ as Ta addition increased from 2wt% to 8wt%. The integration of these two factors increased the primary dendrite arm spacing and changed the morphology and size of γ′ precipitates. With increasing Ta addition from 2wt% to 8wt%, the size of γ′ precipitates in the dendrite core increased substantially from 0.24 to 0.40 μm, whereas the γ′ precipitates in the interdendritic region decreased slightly from 0.56 to 0.47 μm. This paper then discussed the mechanism of these “Ta effects”.

关键词： superalloys tantalum solidification behavior microstructure

Pharmacological targeting cGAS/STING/NF-κB axis by tryptanthrin induces microglia polarization toward M2 phenotype and promotes functional recovery in a mouse model of spinal cord injury

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3287-3301页

作者： Ziwei Fan Mengxian Jia jian Zhou Zhoule Zhu Yumin Wu Xiaowu Lin Yiming Qian Jiashu Lian Xin Hua jianhong dong Zheyu Fang Yuqing Liu Sibing Chen Xiumin Xue Juanqing Yue Minyu Zhu Ying Wang Zhihui Huang Honglin Teng Department of Orthopedics(Spine Surgery) the First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiang ProvinceChina School of Pharmacy Hangzhou Normal UniversityHangzhouZhejiang ProvinceChina Department of Neurology The First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiang ProvinceChina Department of Pathology Affiliated Hangzhou First People’s HospitalSchool of MedicineWestlake UniversityHangzhouZhejiang ProvinceChina Department of Clinical Research Center Affiliated Hangzhou First People’s HospitalSchool of MedicineWestlake UniversityHangzhouZhejiang ProvinceChina

The M1/M2 phenotypic shift of microglia after spinal cord injury plays an important role in the regulation of neuroinflammation during the secondary injury phase of spinal cord *** of shifting microglia polarization from M1(neurotoxic and proinflammatory type)to M2(neuroprotective and anti-inflammatory type)after spinal cord injury appears to be *** possesses an anti-inflammatory biological ***,its roles and the underlying molecular mechanisms in spinal cord injury remain *** this study,we found that tryptanthrin inhibited microglia-derived inflammation by promoting polarization to the M2 phenotype in *** promoted M2 polarization through inactivating the cGAS/STING/NF-κB ***,we found that targeting the cGAS/STING/NF-κB pathway with tryptanthrin shifted microglia from the M1 to M2 phenotype after spinal cord injury,inhibited neuronal loss,and promoted tissue repair and functional recovery in a mouse model of spinal cord ***,using a conditional co-culture system,we found that microglia treated with tryptanthrin suppressed endoplasmic reticulum stress-related neuronal *** together,these results suggest that by targeting the cGAS/STING/NF-κB axis,tryptanthrin attenuates microglia-derived neuroinflammation and promotes functional recovery after spinal cord injury through shifting microglia polarization to the M2 phenotype.

关键词： cGAS/STING functional recovery microglia neuroinflammation neuroprotection nuclear factor-κB polarization spinal cord injury tryptanthrin

Microstructure and homogenization process of as-cast GH4169D alloy for novel turbine disk

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2019年第7期26卷 889-900页

作者： Kai Chen Shu-yuan Rui Fa Wang jian-xin dong Zhi-hao Yao School of Materials Science and Engineering University of Science and Technology Beijing

To investigate the microstructure, segregation, and suitable homogenization process of as-cast GH4169D alloy, the microstructure, elements segregation, and precipitates of cast GH4169D ingots prepared by vacuum induction melting (VIM) and vacuum arc remelting (VAR) were observed by optical microscopy (OM), scanning electron microscopy, and energy-dispersive X-ray spectroscopy (EDS). According to the residual segregation model and simulation results of DICTRA thermodynamic software, the homogenization temperature and time range were set as 1120–1170°C and 5–20 h, respectively. The experimental results showed that microscopic dendrite and element segregation occurred in the interior of ingots and the main segregation elements were Nb and Ti. In addition, the precipitates were mainly distributed in interdendritic regions and were composed of NbC, Laves,γ′, and δ phases. The homogenization process suggested that the interdendritic detrimental precipitated Laves phase can be eliminated or redissolved after homogenization at 1150°C for 20 h, suggesting it was the most suitable homogenization treatment. Thermal compression test results showed that the GH4169D alloys after homogenization treatment had no cracks and dynamic recrystallization occurred, with recrystallization volume fraction increasing with temperature, indicating a good working plasticity at temperatures from 1050 to 1200°C.

关键词： GH4169D superalloy as-cast microstructure segregation homogenization thermal deformation

Digital single-operator cholangioscopy for biliary stricture after cadaveric liver transplantation

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2022年第5期14卷 1037-1049页

作者： jian-Feng Yu dong-Lei Zhang Yan-Bin Wang jian-Yu hao Department of Gastroenterology Beijing Chao-Yang HospitalCapital Medical UniversityBeijing 100020China

BACKGROUND Biliary strictures after liver transplantation(LT)remain clinically arduous and challenging situations,and endoscopic retrograde cholangiopancreatography(ERCP)has been considered as the gold standard for the management of biliary strictures after ***,in the treatment of biliary strictures after LT with ERCP,many studies show that there is a large variation in diagnostic accuracy and therapeutic success *** single-operator peroral cholangioscopy(DSOC)is considered a valuable diagnostic modality for indeterminate biliary *** To evaluate DSOC in addition to ERCP for management of biliary strictures after *** Nineteen patients with duct-to-duct biliary reconstruction who underwent ERCP for suspected biliary complications between March 2019 and March 2020 at Beijing Chaoyang Hospital,Capital Medical University,were consecutively enrolled in this observational *** evaluating bile ducts using fluoroscopy,cholangioscopy using a modern digital single-operator cholangioscopy system(SpyGlass DS^(TM))was performed during the same procedure with patients under conscious *** patients received peri-interventional antibiotic *** strictures after LT were classified according to the manifestations of choledochoscopic strictures and the manifestations of transplanted hepatobiliary *** Twenty-one biliary strictures were found in a total of 19 patients,among which anastomotic strictures were evident in 18(94.7%)patients,while non-anastomotic strictures in 2(10.5%),and space-occupying lesions in 1(5.3%).Stones were found in 11(57.9%)and loose sutures in 8(42.1%).A benefit of cholangioscopy was seen in 15(78.9%)*** was crucial for selective guidewire placement prior to planned intervention in 4 *** was instrumental in identifying biliary stone and/or loose sutures in 9 patients in whom ERCP *** also provided a direct vision for laser lithotripsy.A spaceoccupying l

关键词： Cholangioscopy Endoscopic retrograde cholangiopancreatography Liver transplantation Biliary strictures Biliary complications Biliary anastomotic stricture

Investigation of geothermal structure of the Sulawesi,using gravity and magnetic method

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 Earth Sciences 2021年第2期64卷 278-293页

作者： jian ZHANG Tianyao hao Miao dong Ya XU Beiyu WANG Yifei AI Gui FANG University of Chinese Academy of Sciences Beijing 100049China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

The Sulawesi Sea and Sulawesi Island are located in the western Pacific area where volcanic activity,plate subduction,and seismic activity are very *** Sulawesi basin formed during the Middle Eocene-Late Eocene and nearly half of the Eocene oceanic crust has subducted below the North Sulawesi *** Sulawesi Island was spliced and finalized in the Early Pliocene-Pleistocene during volcanic activity and is recently very *** area is an optimal location to study volcanic geothermal conditions and subduction initiation mechanisms in the southern part of the western Pacific plate margin,which are important in geothermal and geodynamic *** this study,we combined 133 heat flow data with gravity and magnetic data to calculate the Moho structure and Curie point depth of the Sulawesi Sea and periphery of the Sulawesi Island,and analyze the distribution characteristics of the geothermal gradient and thermal *** results show that the average depths of the Moho and Curie surfaces in this area are 18.4 and 14.3 km,respectively,which is consistent with the crustal velocity layer structure in the Sulawesi Basin previously determined by seismic *** average geothermal gradient is 4.96°C(100 m)-*** oceanic area shows a high geothermal gradient and low thermal conductivity,whereas the land area shows a low geothermal gradient and high thermal conductivity,both of which are consistent with statistical results of the geothermal gradient at the measured heat flow *** highest geothermal gradient zone occurs in the transition zone from the Sulawesi Sea to Sulawesi Island,corresponding to the spreading ridge of the southward-moving Sulawesi *** gravity,magnetic,and geothermal studies have shown a high crustal geothermal gradient in the study area,which is conducive to the subduction *** northern part of the Palu-koro fault on the western side of Sulawesi is likely the location where subduction initiation i

关键词： Sulawesi Sea and Sulawesi Island Gravity and geothermal gradient Thermal crust Moho and Curie point depth Subduction retreat and sinistral strike-slip