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Trapping the Short-chain Odd Carbon number Olefins Using nickel(Ⅱ)-Catalyzed Tandem Ethylene Oligomerization and Friedel-Crafts Alkylation of Toluene

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ch.nese Journal of chemistry 2023年第21期41卷 2855-2865页

作者： Sergey V.Zubkevich Vladislav A.Tuskaev Svetlana ch.Gagieva Alexander A.Pavlov Victor n.Khrustalev Fei Wang Li Pan Yuesheng Li Daniele Sarach.no Anton A.Vikhrov Dmitry n.Zarubin Boris M.Bulychev Department of chemistry Lomonosov Moscow State UniversityLeninskie Gory 1Moscow119991 Russian Federation Materials Research and Technology Department Luxembourg Institute of Science and Technology5Avenue des Hauts-FourneauxL-4362 Esch-sur-AlzetteLuxembourg A n nesmeyanov institute of Organoelement Compounds Russian Academy of SciencesVavilova st.28Moscow119991 Russian Federation BMSTU Center of national Technological initiative“Digital Material Science:new Material and Substances” Bauman MoscowState Technical University2nd Baumanskaya st.5MoscowRussian Federation Peoples’Friendship University of Russia(RUDn University) Miklukho-Maklay St.6Moscow117198 Russian Federation Zelinsky institute of Organic chemistry Russian Academy of SciencesLeninsky Prospekt 47Moscow119991 Russian Federation institute of Advanced Polymer Materials School of Materials Science and EngineeringTianjin UniversityTianjin300350 China

nickel(Ⅱ)complexes with pyrazole-based ligands are widely employed in catalysis of ethylene oligomerization and subsequent Friedel-Crafts alkylation of *** have prepared ten new nickel(Ⅱ)dibromide complexes with various substituted bis(azolyl)*** have been characterized using^(1)H nMR,iR,high resolution mass spectrometry and elemental *** structures of three complexes have been unambiguously established using X-ray *** was found that these complexes in the presence of Et2AlCl or Et_(3)Al_(2)Cl_(3)are active both in ethylene oligomerization and Friedel-Crafts alkylation processes(activity up to 3720 kgoligomer·mol[ni]^(−1)·h^(−1)).The use of Et_(3)Al_(2)Cl_(3)results in a higher share of alkylated products(up to 60%).Moreover,catalytic systems activated with Et_(3)Al_(2)Cl_(3)produced small amounts of odd carbon number olefins(up to 0.8%).The Friedel-Crafts alkylation was used as a trap for previously undetected short-chain odd carbon number olefins(C_(3)and C_(5)).

关键词： Ethylene oligomerization Friedel-Crafts alkylation nickel(Ⅱ)complexes n-ligands Odd carbon number olefins

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STRUGGLE BETWEEn COnFUCiAn AnD LEGALiST SchOOLS AnD SCiEnTiFiC AnD TEchnOLOGiCAL DEVELOPMEnT in AnCiEnT ch.nA

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Science in ch.na,Ser.A 1974年第6期 709-716页

作者：李群

For more than two thousand years, the struggle between the line of the Confucian School and that of the Legalist School has had a profound influence upon all spheres of ch.na’s social life and upon the development of... 详细信息

关键词： STRUGGLE BETWEEn COnFUCiAn AnD LEGALiST SchOOLS AnD SCiEnTiFiC AnD TEchnOLOGiCAL DEVELOPMEnT in AnCiEnT ch.nA line

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Radial nerve recovery following closed nailing of humeral shaft fractures without radial nerve exploration: A retrospective study

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World Journal of Clinical Cases 2021年第27期9卷 8044-8050页

作者： Kuei-Lin yeh ch.n-Kun Liaw Tai-Yin Wu ch.ng-Pei ch.n Department of Orthopedics Shin Kong Wu-Ho Su Memorial HospitalTaipei City 111Taiwan Department of Orthopedics School of MedicineCollege of MedicineTaipei Medical UniversityTaipei City 11031Taiwan Department of Orthopedics Shuang Ho HospitalTaipei Medical UniversityNew Taipei City 23561Taiwan Graduate institute of Biomedical Optomechatronics College of Biomedical EngineeringResearch Center of Biomedical DeviceTaipei Medical UniversityTaipei City 11301Taiwan Department of Family Medicine Zhongxing BranchTaipei City HospitalTaipei City 10341Taiwan institute of Epidemiology and Preventive Medicine National Taiwan UniversityTaipei City 10055Taiwan national Taipei University of nursing and Health Science Taipei City 11219Taiwan Department of Orthopedics Cathay General HospitalNew Taipei City 221Taiwan

BACKGROUnD Radial nerve palsy due to humeral shaft fracture is the most common peripheral nerve injury associated with long bone *** antegrade nailing surgical technique is becoming popular for the fixation of these fractures with minimal *** analyzed nerve recovery in patients with humeral shaft fracture and radial nerve palsy treated with humeral nail fixation without nerve *** To assess the radial nerve recovery rate and time from humeral shaft fracture with surgical treatment using close *** We retrospectively collected data of patients who underwent undergone surgical nail fixation for humeral shaft fractures between October 1,2016,and March 31,***,we analyzed the primary or secondary radial nerve palsy recovery rate and radial nerve motor function recovery *** The study included 70 patients who underwent surgical treatment for closed-or Gustilo type i open humeral shaft fractures using a nail fixation technique without radial nerve *** patients suffered from primary(n=5)and secondary(n=5)radial nerve palsy.A 100%radial nerve recovery rate was *** mean recovery time was 4.3 *** The study results indicate full recovery of radial nerve palsies from humeral shaft fracture using close nailing *** need not be concerned about the occurrence of permanent nerve palsies.

关键词： Humeral shaft fracture Radial nerve palsy Close nailing fixation nerve exploration

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A Plant SMALL RnA-BinDinG PROTEin 1 Family Mediates Cell-to-Cell Trafficking of RnAi Signals

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Molecular Plant 2020年第2期13卷 321-335页

作者： Yan Yan Byung-Kook Ham Yee Hang ch.ng Shyi-Dong yeh William J.Lucas Department of Plant Biology College of Biological SciencesUniversity of CaliforniaDavisCA 95616USA Department of Plant Pathology National Chung-Hsing UniversityTaichung Present address:Global institute for Food Security University of SaskatchewanSaskatoonSK S7N 4J8Canada Present address:Department of Biology University of Saskatchewan112 Science PlaceSaskatoonSK S7N 5E2Canada

in plants,RnA interference(RnAi)plays a pivotal role in growth and development,and responses to environmental inputs,including pathogen *** intercellular and systemic trafficking of small interfering RnA(siRnA)/microRnA(miRnA)is a central component in this regulatory ***,little is known with regards to the molecular agents involved in the movement of these si/*** address this situation,we employed a biochemical approach to identify and characterize a conserved SMALL RnA-BinDinG PROTEin 1(SRBP1)family that mediates non-cell-autonomous small RnA(sRnA)*** Arabidopsis,AtSRBP1 is a glycine-rich(GR)RnA-binding protein,also known as AtGRP7,which we show binds single-stranded siRnA.A viral vector,Zucch.ni yellow mosaic virus(ZYMV),was employed to functionally characterized the AtSRBP1-4(AtGRP7/2/4/8)RnA recognition motif and GR ***-based studies revealed the GR domain as being necessary and sufficient for SRBP1 cell-to-cell *** together,our findings provide a foundation for future research into the mech.nism and function of mobile sRnA signaling agents in plants.

关键词： RnAi small RnA-binding protein family small RnA movement non-cell-autonomous protein glycinerich protein

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The Electrochemical investigation of MEH-PPV in ionic Liquid

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ch.nese chemical Letters 2000年第10期11卷 919-920页

作者： Yang, ch He, GF Zheng, JR Qiao, J Li, YF ch.nese Acad Sci Inst Chem Ctr Mol Sci Lab Organ Solids Beijing 100080 Peoples R China

The electrochemical properties of MEH-PPV were: studied in ionic liquid([bmim](+)[PF6](-)) by cyclic voltammetry, chronoamperometry and AC impedance measurements. Both p- and n-doping of MEH-PPV were observed in the cyclic voltammograms, The chronoamperometric and AC impedance results indicate that the p-doping of MEH-PPV was controlled by the linear diffusion of counterions.

关键词： MEH-PPV electrochemistry ionic liquid

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Anthracene Removal and Mineral n Dynamics in a Surfactant-Amended Soil

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Pedosphere 2014年第6期24卷 783-790页

作者： M.R.CRDEnAS-AQUinO G.SALOMón-HERnnDEZ .AGUiLAR-chVEZ M.L.LUnA-GUiDO R.MARSch L.DEnDOOVEn Laboratory of Soil Ecology Department of Biotechnology and BioengineeringCinvestavMexico D.F.C.P.07360 (Mexico)

Surfactants, such as non-ionic Surfynol 485 （ethoxylated 2,4,7,9-tetramethyl-5-decyne-4,7-diol）, have been applied to accelerate removal of polycyclic aromatic hydrocarbons from soil. This study investigated the dissipation of anthracene, and carbon （C） and nitrogen （n） mineralization in soil amended with non-ionic Surfynol 485 at different rates. Soil samples of a Typic Fragiudept taken from Otumba, Mexico were spiked with anthracene at a final concentration of 520 mg kg^-1 dry soil using acetone as solvent, amended with 0.0, 24.9, 49.8 or 124.4 g kg^-1 soil of the surfactant and incubated in the laboratory. The soil not amended with anthracene, acetone and the surfactant was used as a control. Dynamics of C and n and the concentration of anthracene were monitored for 56 d. After 56 d of incubation, 38% of the anthracene was removed from the unamended soil, and 47%, 55% and 66% of the anthracene were removed when 24.9, 49.8 and 124.4 g kg^-1 of the surfactant were applied, respectively. Application of acetone, anthracene or surfactant increased the emission of CO2, but decreased the mineral n compared to the unamended control. Applying the surfactant to the acetone or anthracene-amended soil reduced emission of CO2, but increased the mineral n at the lower application rates of the surfactant. it was found that the application of the non-ionic surfactant increased the bioavailability of anthracene and thus its removal from soil, increased C mineralization, but decreased n miaeralization. Consequently, the application of non-ionic surfactant could be easily used to accelerate the removal of pollutants from hydrocarbon-contaminated soils, but mineral n in the soil would decrease, which might inhibit plant growth.

关键词： acetone anthracene bioavailability C mineralization CO2 emission non-ionic surfactant Surfynol 485 polycyclic aromatic hydrocarbons

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Synthesis and characterization of La ni_xCo_(1–x)O_3: Role of microstructure on magnetic properties

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Journal of Rare Earths 2015年第3期33卷 277-281页

作者： L.chávez-Guerrero B.Medina-Lott R.F.Cienfuegos M.A.Garza-navarro R.n.Vannier A.Ringuedé M. Hinojosa M.Cassir Universidad Autónoma de nuevo León FIME. Cd. Universitaria San Nicolás de los Garza México C.P. 66450 México Laboratoired’Electrochimie et de chimie Analytique UMR 7575 CNRS Chimie Paris Tech ENSCP 11 rue Pierre et Marie Curie F-75231 Paris Cedex 05 France Centro de innovación Investigación y Desarrollo en Ingeniería y Tecnología PIIT Monterrey México Unité de Catalyse et de chimie du Solide UMR 8181 CNRS Villeneuve d’Ascq France

Perovskite-type structures with the composition La ni x Co1–x O3（x=0.3, 0.5, 0.7） were synthesized by a modified sol-gel method. Using transitional metal elements on the lanthanum base perovskites, properties could be tuned by doping the structure. Thermogravimetric analysis（TGA） evidenced a temperature of 350 °C as the start point of the perovskite-phase formation. Scanning electron microscopy（SEM） images showed the microstructure ch.nges（grain size） of the cobalt-doped perovskite due to composition. in addition, it was shown that magnetic properties of the samples were dependent of cobalt content; experimental results pointed to the existence of disordered spins interactions, which were more evident with the decrease of cobalt content and the existence of ferromagnetic coupling among spins of the samples. These results showed the feasibility of producing a family of compounds with the desired properties, manipulating composition and therefore the microstructure.

关键词： Co-doped perovskite microstructural control modified sol-gel ferromagnetic rare earths

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The Structure of Cool Flame Fronts of Pentane, iso-Pentane and Their Mixture

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Journal of Thermal Science 2000年第4期9卷 365-370页

作者： Z.A.Mansurov ch.K.Westbrook 等 Al－FarabiKazakhStatenationalUniversity KarasaiBatryStr.95Akmaty480012kazakhstan UniversityofCaliforniaLawrenceLivermorenationalLaboratory

An experimental study of the combustion of two isomers of n-pentane and iso-pentane in laminar cool flames has been carried out. Three flames were studied, one with n-pentane, the second with iso-pentane, and the third with an equimolar mixture of the two isomers. Particular attention has been given to the low temperature region ahead of the hot region of the flame and the cool flame chemistry occurring there. A unique experimental facility has been used to provide access to this cool flame region. Comparisons are made of the structures of the three flames, with particular attention on the different intermediate species produced and the correlations between the fuel molecule structure and the specific intermediates produced.

关键词： hydrocarbon cool names concentration profile.

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Sorption properties of carbonized biopolymers of plant origin

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Carbon Resources Conversion 2023年第1期6卷 34-42页

作者： A.P.Karmanov A.P.Voznyakovsky L.S.Kocheva n.G.Rachkova n.i.Bogdanovich institute of Biology of Komi Scientific Center Ural BranchRussian Academy of SciencesSyktyvkar 167982 Russia Federal State Unitary Enterprise“S.V.Lebedev institute of Synthetic Rubber” St.Peterburg 198035 Russia institute of Geology of Komi Scientific Center Ural BranchRussian Academy of SciencesSyktyvkar 167982 Russia Lomonosov northern(Arctic)Federal University Arkhangelsk 163002 Russia

Studies of carbon nanomaterials(CnM)synthesized from lignocellulosic biomass,and natural and technical lignins were carried *** the first time,we suggested using stems of Sosnovsky hogweed,one of the most aggressive and poisonous invasive plant species,to produce *** influence of the choice of raw materials and synthesis conditions on the sorption and surface-porous characteristics of the samples was *** main regularities of adsorption processes from aqueous media with a low concentration(0.625μg/ml)of uranium were *** found that strong retention of uranium characterizes carbonized biopolymers(CBP)samples,a significant amount of which(67-70%)is not desorbed either by water or aqueous solutions of ch3COOnH4 and HCi(1 M).in addition,we found out that the carbon nanomaterials we synthesized can adsorb mycotoxin *** obtained results indicated a high innovative potential of CnM.

关键词： Carbon nanomaterials Adsorption Lignins Carbonized biopolymers Uranium

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Rotational and Vibrational Temperatures of Atmospheric Double Arc Argon-nitrogen Plasma

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ch.nese Physics Letters 2007年第5期24卷 1317-1320页

作者：严建华屠昕马增益岑可法 B. G. chéon State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 UMR 6614 CnRS CORiA Saint Etienne du Rouvray 76801 France

The spectroscopic technique is employed to study the emission of atmospheric argon-nitrogen plasma jet generated by an original dc double anode plasma torch. The molecular bands of the n^＋2 first negative system are observed at the torch exit and chosen to evaluate the rotational and vibrational temperatures in comparison with the simulated spectra. The excitation temperature （Texc ≈ 9600 K） is determined from the Boltzmann plot method. The results show that the rotational, vibrational, electron and kinetic temperatures are in good agreement with one another, which indicates that the core region of atmospheric double arc argon-nitrogen plasma jet at the torch exit is close to the local thermodynamic equilibrium state under our experimental conditions.

关键词： n-2(+) BAnD

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