rings相关论文
Ring structures of conjugated polymers have become attractive because of their special configuration, unique features, a......
<正> This letter is a continuation of a previous paper A class of commutative rings Without Goldbach property, on the ba......
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<正> This letter is a continuation of a previous paper 'A class of commutative rings with Goldbach property'. (I......
<正> In this letter we shall define φ-full morphism ring which takes semi-local rings, the direct product of random num......
The near-rings in this letter always stand for zero-symmetric left nor-rings. An additive endomorphism D of a near-ring ......
In 1967, K. Koh showed that (Ⅰ)if a ring R contains n (n】1) left (right)zero divi-sors, then |R|≤n~2; (Ⅱ)if a ring R......
Let R be a Gorenstein ring.We prove that if I is an ideal of R such that R/I is a semi-simple ring,then the Gorenstein f......
By using a single-year discrimination chronology detrended from a δ13C chronology from Chinese pine (Pinus tabulaeformi......
In the study of the holonomic modules over D_n(■_n) and ■p, it is claimed and used that gr(D_n)(gr(■_n)) and gr(■p) ......
A ring R is left co-semihereditary (strongly left co-semihereditary) if every finitely cogenerated factor of a finitely ......
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4-Amino-3-(p-chlorophenyl)-5-(p-methoxybenzyl)-4H-1,2,4-triazole:X-ray and DFT-calculated Structures
The title compound, 4-amino-3-(p-chlorophenyl)-5-(p-methoxybenzyl)-4H-1,2,4- triazole I , C16H15ClN4O), has been determi......
The title compound N-(2,6-difluorobenzoyl)-N’-[5-(4-trifluoromethylphenyl)-1,3,4-thiadiazol-2-yl]urea(C17H9F5N4O2S,Mr =......
The assembly of metal ions Zn2+, Co2+ and H2E2Ge2O3 ligand under mild hydro- thermal conditions leads to a mixed 3D tran......
Structural Investigation,Quantum Mechanical Study and Hirshfeld Surface Analysis of One Novel Adduct
One novel adduct based on aminopyridinium and biphenyl-2,4′-dicarboxylate, C5H7N2+·C14H9O4-, has been synthesized and ......
Characterization of Average Molecular Structure of Heavy Oil Fractions by ~1H Nuclear Magnetic Reson
The chemical structure of heavy oil fractions obtained by liquid-solid adsorption chromatography was character-ized by 1......
An efficient and regioselective synthesis of N-9 alkoxyalkylated purine nucleoside derivatives was achieved via the N-al......
Synthesis,Crystal Structure and Biological Evaluation of 4-Chloro-2-(morpholine-4-carbonyl)phenyl-4′
The title compound 4-chloro-2-(morpholine-4-carbonyl)phenyl-4’-methoxybenzoate(C19H18ClNO5, Mr = 375.79), a 5-chlorosal......
The geometric configurations and electronic structures of AlSn ±(n = 1~10) clusters were studied by the B3LYP(DFT) meth......
Synthesis, Structure and Property of a Novel Coordination Polymer [Tb(C_7H_3NO_4)(C_6H_4NO_2)(H_2O)]
A novel terbium(III) coordination polymer [Tb(C7H3NO4)(C6H4NO2)(H2O)] was successfully synthesized hydrothermally and ch......
Quadratic Recursion Relations of Hodge Integrals via LocalizationAbstractGang TIAN Jian ZHOUV%deriVe some q11adratic rec......
Non-merohedrally Twinned Crystal Structure of the Co-crystal Ethyl 6-(2-5-(Ethoxycarbonyl)-pyridin-2
The two component molecules of the co-crystal 0.69(C18H20N2O6)?0.31(C18H18N2O6) lie on a center-of-inversion that exists......
Tuning the solid-state emission of the analogous GFP chromophore by varying alkyl chains in the imid
New analogues of green fluorescent protein(GFP)chromophore mGFP-Cn(n=1,3,5,11)with alkyl chains of different lengths in ......
Novel 2H-pyrazolo[4,3-c]hexahydropyridine derivatives: Synthesis, crystal structure, fluorescence pr
A series of novel 2H-pyrazolo[4,3-c]hexahydropyridine derivatives (II) have been designed and synthesized. The target co......
A[3]rotaxane 1 involving two naphtho-21-crown-7(N21C7) rings and a dumbbell-shaped component 4 was synthesized.The dumbb......
Synthesis and Crystal Structure of a New Zn(Ⅱ) Coordination Polymer Constructed by 1,2,4,5-Benzenete
A new Zn(Ⅱ) coordination polymer [Zn3(btec)(OH)2(H2O)2]n (1, btec = 1,2,4,5- benzenetetracarboxylate) has been synthesi......
Aminosilane bearing bulky substituents on nitrogen: LH2(L=Me2Si(NDipp-)2 , Dipp=2,6-diisopropylphenyl) was reacted with ......
Tetraiodo-4,4’-bi-1,2,4-triazole(1)was synthesized from a reaction of iodine monochloride with 4,4’-bi-1,2,4-triazole(......
With the support by the National Natural Science Foundation of China,the research team led by Prof.Yan Hong(燕红)at the ......
The title compound, methyl 2-(diphenylamino)-4-phenyl-1,3-thiazole-5-carboxylate, was synthesized and studied by single-......
Synthesis, Crystal Structure and Biological Activity of 1,5-Bis(4-methoxyphenyl)-3-(4-methyl-1,2,3-t
The title compound 1,5-bis(4-methoxyphenyl)-3-(4-methyl-1,2,3-thiadiazol-5-yl)-pentane-1,5-dione (C22H22N2O4S, Mr=410.49......
Crystal Structure and Theoretical Energy Gap of 2-(2-((4-(Pyridin-2-yl)pyrimidin-2-yl)disulfanyl)pyr
The crystal structure of 2-(2-((4-(pyridin-2-yl)pyrimidin-2-yl)disulfanyl)pyrimidin-4-yl)pyridinium hexafluorophosphate ......
Cobalt Triarylcorroles with Sterically Hindered Haloginated Phenyl Rings:Synthesis,Crystal Structure
Three new cobalt triarylcorroles with sterically hindered haloginated phenyl rings were synthesized and characterized by......
Syntheses and Structures of Three Hybrid Materials Using Vanadium Polyoxoanions and Macrocyclic Copp
The reactions of the four-coordinated macrocyclic copper complex [CuL](ClO_4)_2(L = 1,4,8,11-tetraazacyclotetradecane) w......
Today is Sunday, my 12th birthday. I get up early, and find there is no one at home. I feel depressed (沮丧的) that my p......
英语中有一些句子虽然只有短短的几个单词,但是用处却非常大。这些句子能在多种场合使用,言简意赅地表达出我们想表达的意思。下面......
China will use jade in the medals for the Beijing Olympics in order to symbolize the nation’s culture On March 1,artisa......
角膜白环症(white rings of the cornea)比较少见,国内尚少报导。其主要表现为角膜上皮下及前弹力层出现环形排列的细小白点状浑......
OXYGEN isotope compositions of organic matter in geological archives, such as treé rings, peats, lake sediments and pa......
The study on stable isotopic compositions of tree rings is playing an important role in reconstructing past climatic va......
Study on Model of Correlation Between Chemical Ele－ment Contents in Tree Rings and Soils near Tree R
ＳｔｕｄｙｏｎＭｏｄｅｌｏｆＣｏｒｒｅｌａｔｉｏｎＢｅｔｗｅｅｎＣｈｅｍｉｃａｌＥｌｅ－ｍｅｎｔＣｏｎｔｅｎｔｓｉｎＴｒｅｅＲｉｎｇｓａｎｄＳｏｉｌｓｎｅａｒＴｒｅｅＲｏｏｔｓＫＥＳＨＡＮ－ＺＨＥ，ＱＩＡＮＪＵＮ－ＬＯＮＧ，ＺＨＵＹＵ－ＸＩＮａｎｄＨ...
Study on Model of CorrelationBetweenChemicalElementContentsinTreeRingsandSoilsnearTreeRootsKESHAN-ZHE, QIANJUN-LONG......
INTRODUCTIONIntheqllantitativestudyofatree-ringenvironmentsystem,iftheaveragecolltentsofelemelltsintreeringsaregiven,tho......
The ~(11)B chemical shifts of boratrane compounds were measured. Quantum chemistry calculations of some of the compound......
本文分别对凉水地区的红皮云杉天然林和帽耳山地区的红皮云杉人工林的管胞性状进行了研究，方差分析结果表明：管胞长度、管胞直径和管......
INTRODUCTION. Macrocyclic compounds have attracked a lot of chemistsbecause of their diverse physical and chemical prop......
CRYSTAL AND MOLECULAR STRUCTURE OF 1-PHENYLAMINOMETHYL-3,7,10-TRIMETHYL-2,8,9-TRIOXA-5-AZA-1-SILITRI
The transparent colourless crystal of the title compound crystallized in monoclinic system with space group P21/c and c......
The title compound C18H16FeO (Mr=304. 17) crystallizes in the mono-clinic system,space group P21/c with cell constants ......
The variation of ~1H NMR shifts of monophthalocyaninatolanthanide(Ⅲ)compoundsof nine rare earth elements from Sm~(3+)t......
