检索结果-南通市图书馆

Chemical Research in Chinese Universities 1990年第1期6卷 73-75页

作者： Lin Pingdi, Wu Guoqing, lu Xiukai and Xu Bi (department of Chemistry, {2. normal University, {2.)

Introduction CsEuF;, CsYbF;and RbYbF;are the first members of divalent rare earth ternary halides obtained via reduction of trivalent rare earth halides by alkali metals. Recently we adopted a new synthesis route in p... 详细信息

关键词： Divalent rare earth ternary halides Synthesis Alkali-metallic thermoreduction

Geochemical characteristics and origin of gases from the Upper,Lower Paleozoic and the Mesozoic reservoirs in the Ordos Basin,china

在线全文

学校读者我要写书评

暂无评论

Science china Earth Sciences 2008年第S1期51卷 183-194页

作者： HU AnPing 1 ,Li Jian 2.,ZHANG WenZheng 3 ,LI ZhiSheng 2.,HOU lu 4 &LIU QuanYou 5 1 department of Earth Sciences,Zhejiang University,Hangzhou 31002.,{2. 2.Langfang Branch,Reasearch Institute of Petroleum Exploration and Development,Petro{2.,Langfang 065007,{2. 3 Institute of Exploration and Development,Petro{2. Changqing Oilfield Company,Xi’an 71002.,{2. 4 University of Petroleum,beijing102.49,{2. 5 Petro{2. Research Institute of Petroleum Exploration and Development,beijing 100083,{2. department of Earth Sciences Zhejiang University Hangzhou China Langfang Branch Reasearch Institute of Petroleum Exploration and Development PetroChina Langfang China Institute of Exploration and Development PetroChina Changqing Oilfield Company Xi’an China University of Petroleum Beijing China Petrochina Research Institute of Petroleum Exploration and Development Beijing China

The Ordos Basin,the second largest sedimentary basin in china,contains the broad distribution of natural gas *** far,several giant gas fields have been discovered in the Upper and Lower Paleozoic in this basin,each having over 1000×10 8 m 3 of proven gas reserves,and several gas pools have also been discovered in the *** paper collected the data of natural gases and elucidated the geochemical characteristics of gases from different reservoirs,and then discussed their *** hydrocarbons preserved in the Upper Paleozoic,the elevatedδ13C values of methane,ethane and propane indicate that the gases would be mainly coal-formed gases;the singular reversal in the stable carbon isotopes of gaseous alkanes suggests the mixed gases from humic sources with different *** the Lower Paleozoic,theδ13C 1 values are mostly similar with those in the Upper Paleozoic,but theδ13C 2.andδ13C 3 values are slightly lighter,suggesting that the gases would be mixing of coal-type gases as a main member and oil-type *** are multiple reversals in carbon isotopes for gaseous alkanes,especially abnormal reversal for methane and ethane(i.e.δ13C 1 >δ13C 2.),inferring that gases would be mixed between high-mature coal-formed gases and oil-type *** the Mesozoic,the δ13Cvalues for gaseous alkanes are enriched in 12.,indicating that the gases are mainly derived from sapropelic sources;the carbon isotopic reversal for propane and butane in the Mesozoic is caused by microbial oxidation and mixing of gases from sapropelic sources with different *** contrast to the Upper Paleozoic gases,the Mesozoic gases are characterized by heavier carbon isotopes of iso-butane than normal butane,which may be caused by gases generated from different kerogen types. Finally,according toδ13C 1 -Ro relationship and extremely low total organic carbon contents,the Low Paleozoic gases would not be generated from the Ordovician source as a main gas source,bycontrast, the Upper Pale

关键词： Ordos Basin natural gas chemical composition carbon isotope genesis

Dinuclear terephthalato-bridged nickel(Ⅱ) complex:structural characterization and magnetic property

在线全文

学校读者我要写书评

暂无评论

Dinuclear terephthalato-bridged nickel(Ⅱ) complex:structura...

Asymptomatic process of hepatic artery thrombosis in a patient after orthotopic liver transplantation

13th Asian Chemical Congress

作者： CHEN Jing,NIE Feng-Mei~*,lu Fei department of Chemistry,{2. normal University,beijing 100048,china

Complexes containing imidazole and benzimidazole have been studied by several groups. Among them,the tripod-like ligand tris(2.benzimidazolylmethyl)amine(ntb)has been studied to model the active site of superoxide ***,we report the synthesis,structure and magnetic property of a terephthalato-bridged dinuclear nickel(Ⅱ)complex [Ni(ntb)(μ-tp)(HO)](NO)·8CHOH·2.O.

关键词： nickel dinuclear complexes benzimidazole magnetic property

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2004年第1期3卷 149-151页

作者： Jia-Wei Chen, Da-Zhi Chen and Guang-Zhong lu Shanghai, china {2. of Pathology, Shanghai First People’ s Hospital, Shanghai 2.0080 , china {2. of Surgery, beijing Chaoyang Hospital, beijing 10002., china department of Pathology Shanghai First People's Hospital Shanghai 200080 China. jiaweichen2000@***

BACKGROUND: Hepatic artery thrombosis is one of the serious complications after liver transplantation. It wil mostly cause a failure of the transplantation. This case o hepatic artery thrombosis showed a stable clinical course and minimal histological change, and now has been survi ving for 4 years with normal liver function. We investigated the possible causes for asymptomatic hepatic artery throm bosis in one patient after orthotopic liver transplantation ( OLT) and discussed the diagnosis of ischemia of OLT pathologically and clinically. METHODS: Liver function test, color Doppler ultrasono graphy, and hepatic arteriography were performed during the development of hepatic arteriothrombosis. Possible fac- tors for the asymptomatic process of the thrombosis were analyzed. RESULTS: On the 4th postoperative day, thrombosis form ed at the anastomotic stoma of the hepatic artery, and on the 11th postoperative day, the artery was completely oc- cluded. Serial liver biopsies revealed intrahepatic cholesta- sis, hydropic degeneration of hepatocytes, atrophy of the biliary epithelium, and fibrosis in the portal area. Monitor- ing of liver function showed nothing abnormal except ele- vation of γ-GT and ALP levels. On the 71st day after OLT, arteriography demonstrated that the hepatic artery re- mained completely occluded in addition to the establish- ment of collateral circulation and compensation of the por- tal vein. The patient didn' t show any symptoms of arterial thrombosis. CONCluSION: Collateral circulation and compensation o the portal vein are beneficial to allograft survival and avoidence of retransplantation after thrombosis of the he- patic artery. Color Doppler ultrasonography within 2.weeks after OLT is helpful to the early diagnosis of hepatic arterio- thrombosis.

关键词： liver transplantation hepatic artery embolism and thrombosis

强奇异卷积算子交换子的Hardy型空间估计

在线全文

学校读者我要写书评

暂无评论

数学学报（中文版） 2003年第3期46卷 417-426页

作者：刘宗光陆善镇北京师范大学数学系

本文给出了强奇异卷积算子交换子[6,T]在Hardy型空间中的估计,其中 b∈BMO(Rn)且一致连续, T为强奇异卷积算子.

关键词：强奇异卷积算子交换子 Hardy型空间 Herz型Hardy空间 BMO(R^n) MR(2.00)

Synthesis and Structure of a New Dinuclear Terephthalato-bridged Copper(Ⅱ) Complex

在线全文

学校读者我要写书评

暂无评论

Synthesis and Structure of a New Dinuclear Terephthalato-bri...

Minimally invasive direct coronary artery bypass plus coronary stent for acute coronary syndrome:a case report

13th Asian Chemical Congress

作者： lu Fei,NIE Feng-Mei~*,YANG Yong-Li department of Chemistry,{2. normal University,beijing 100048,china

Much attention has been paid to complexes of imidazole and benzimidazole ligands as they serve as functional models for active sites of ***,we report a novel dinuclear terephthalato-bridged copper(Ⅱ)complex[Cu(bbma)(... 详细信息

关键词： Copper(Ⅱ) complex Crystal structure Terephthalate ligand

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2008年第3期5卷 186-189页

作者： Caiyi lu~1 Cangqing Gao~2.Shiwen Wang~1 Yuxiao Zhang~1 Ming Yang~2.Qiao Xue~1 Cangsong Xiao Wei Gao~1 Yang Wu~2.Gang Wang~3 Qi Zhou~3 Jinwen Tian~1 Lei Gao~1 Shenhua Zhou~1 Jinyue Zhai~1 Rui Chen~1 Zhongren Zhao~1 1. Institute of Geriatric Cardiology 2. department of Cardiac Surgery 3. department of Annesthesiology, PLA General Hospital, beijing 100853, china Institute of Geriatric Cardiology PLA General Hospital Beijing 100853 China department of Cardiac Surgery PLA General Hospital Beijing 100853 China department of Anesthesiology PLA General Hospital Beijing 100853 China

A 69-year old female patient was admitted because of 3 days of worsened chest *** angiography showed 60% stenosis of distal left main stem,chronic total occlusion of left anterior descending (LAD),70% stenosis at the ostium of a small left circumflex,70-90% stenosis at the paroxysmal and middle part of a dominant right coronary artery (RCA),and a normal left internal mammary artery (LIMA) with normal origination and *** intervention was attempted but failed on the occluded lesion of *** patient received minimally invasive direct coronary artery bypass (MIDCAB) with left LIMA isolation by Davinci *** days later,the RCA lesion was treated by Sirolimus Rapamicin eluting stents implantation *** the patient was discharged uneventfully after 3 days *** experience suggests that two stop shops of hybrid technique be feasible and safe in the treatment of elderly patient with multiple coronary diseases.

关键词： coronary artery disease coronary artery bypass percutaneous coronary intervention

Temporal and Spectral Characteristics of Persistent Emission and Special Bursts of Magnetar SGR J1935+2.54 Based on Insight-HXMT

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第6期24卷 225-233页

作者： Xue-Feng lu Li-Ming Song Ming-Yu Ge Shuang-Nan Zhang Jin-lu Qu Ce Cai Cong-Zhan Liu Cheng-Kui Li Yu-Cong Fu Ying-Chen Xu Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal UniversityShijiazhuang 050024China department of Astronomy Beijing Normal UniversityBeijing 100875China

In October 2.2.,the magnetar SGR J1935+2.54 entered the active outburst *** the episode,the InsightHXMT satellite carried out a long observation that lasted for 2. *** than 300 bursts were detected,and a certain amount of persistent radiation signals were also *** paper mainly introduces the results of persistent radiation profile folding and period search based on Insight-HXMT *** the same time,the burst phase distribution characteristics,spectral lag results of burst,the spectral characteristics of zero-lag bursts and the time-resolved spectral evolution characteristics of high-flux bursts are *** found that there is no significant delay feature during different energy bands for the bursts of SGR J1935+*** observed zero-lag burst does not have a unique *** time-resolved spectrum of the individual burst has consistent spectral types and spectral parameters at different time periods of the *** also find that the burst number phase distribution and the burst photon phase distribution have the same tendency to concentrate in specific regions of the persistent emission profile.

关键词： radiation mechanisms:general dense matter magnetic fields

A Discrete Singular Integral Operator(In Memory of Professor Long Ruilin)

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 1998年第2期14卷 235-244页

作者： Fan Dashan (department of Mathematical Sciences,University of Wisconsin-Milwaukee,Milwaukee,WI 532.1,USA)(Email:fan@alpha1.csd.uwm.edu)lu Shanzhen (department of mathematics,beijing normal University,beijing 100875,china)(Email:lusz@***)Pan Yibiao (department of mathematics and Statistics,University of Pittsburgh,Pittsburgh,PA 152.0,USA)(Email:yibiao@tomato.math.pitt.edu) University of Wisconsin-Milwaukee 美国北京师范大学数学系北京 Pittsburgh大学美国

Suppose that {αk}k∞=-∞ is a Lacunary sequence of positive numbers satisfying infαk+1/αk=α>1 and that Ω（y’）is a function in the Besov space B10,1(Sn-1)where Sn-1 is the unit sphere on Rn（n≥2..We prove that if ∫Sn-1Ω（y’）dσ（y’）=0 then the discrete singular integral operator TΩf（x）=∫(Sn-1)f（x-αky’）Ω（y’）dσ（y’） and the associated maximal operator TΩf（x）=∫Sn-1f（x-αky’）Ω（y’）dσ（y’） are both bounded in the space L2./sup>（Rn）. The theorems in this paper improve a result by Duoandikoetxea and Rubio de Francia in the L2./sup> case.

关键词： Singular integral Besov space Rough kernel

在线全文

学校读者我要写书评

暂无评论

基本李代数的一种等价刻画

数学研究 2003年第2期36卷 202-210页

作者：赵新超卢才辉首都师范大学数学系首都师范大学数学系北京100037

文 [1]提出一个问题 :“如果李代数L的所有幂零子代数都是交换子代数 ,那么L是否在它的每个理想上可分 ?”并给出一个反例说明该问题一般不成立 .本文就是从分析该反例入手 ,说明问题不成立的原因 ,并给出该问题成立的条件 ,从而在一般... 详细信息

文 [1]提出一个问题 :“如果李代数L的所有幂零子代数都是交换子代数 ,那么L是否在它的每个理想上可分 ?”并给出一个反例说明该问题一般不成立 .本文就是从分析该反例入手 ,说明问题不成立的原因 ,并给出该问题成立的条件 ,从而在一般情况下给出基本李代数的一个等价刻画

关键词： Frattini子代数 Frattini理想 φ-自由李代数基本李代数可裂的李代数