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Olefin Polymerization Behavior of Titanium(IV) Complexes with Fluorinated and Non-fluorinated Aliphatic Phenoxyimine Ligands

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Chinese Journal of Polymer science 2024年第1期42卷 52-62,I0007页

作者： Vladislav A.Tuskaev Kasim F.Magomedov svetlana Ch.Gagieva Dmitry A.Kurmaev Yulia V.Nelyubina Evgenii K.Golubev Maria D.Evseeva Viktor G.Vasil'ev Galina G.Nikiforova Mikhail I.Buzin Vyacheslav s.Bogdanov Boris M.Bulychev Department of Chemistry M.V.Lomonosov Moscow State UniversityMoscow 119992Russian Federation A.N.Nesmeyanov Institute of Organoelement Compounds Russian Academy of SciencesMoscow119991Russian Federation Enikolopov Institute of synthetic Polymer Materials Russian Academy of SciencesMoscow 117393Russian Federation

A series of Ti(Ⅳ) dichloride and dialkoxide com plexes with phenoxyimine ligands containing fluorinated and nonfluorinated aliphatic imine fragments have been *** molecular structures of complexes 1 and 4 were established by single-crystal X-ray diffraction *** complexes adopt a distorted octahedral coordination structure around the titanium atom and two oxygen atoms are situated in trans position while two nitrogen atoms and two outgoing ligands(Cl or iPrO) are situated in cis *** of activators(MMAO-12 and combinations Et_nAICl_(3-n)+Bu_(2)Mg) and outgoing ligand(Cl or iPrO) nature on the catalytic activity and properties of the resulting polymers was *** Ti complexes,despite the nature of the outgoing ligands(Cl or iPrO) in the presence of Al/Mg activators,was found to display a high ethylene polymerization activity in the range 1600-3830 kg_(polymer)·mol_(Ti)^(-1)·h^(-1)·atm^(-1) with a viscosity average molecular weight(M_v) value in the range 1.1×10~6-7.1×10~6 Dalton(Da).The resulting UHMWPE can be processed by a solventless method into high-strength and high-modulus oriented *** rheological characteristics of a polymer melt have been *** absence of a cross-over point did not allow to compare the values of the molecular weight distribution of polymers obtained on fluorinated and non-fluorinated pre-catalysts,however,the estimation of the entanglement density is in good agreement with the mechanical characteristics of oriented film *** activation with methylalumoxane,the activity of the com plexes decreased very significantly;however,a polymer with a molecular weight of about 12 million Da was *** the process of ethylene/octene-1 copolymerization,fluorine-containing precatalysts showed a clear advantage over non-fluorinated analogues both in activity and in comonomer content.

关键词： FI catalysts Titanium(IV) (Co)polymerization Al/Mg co-catalyst Ultra-high molecular weight polyethylene

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Chilling Tendency and Chill of Cast Iron

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Tsinghua science and Technology 2008年第2期13卷 177-183页

作者： E. fraé M. Górny W. Kapturkiewicz H. López AGH University of science and Technology University of Wisconsin-Milwaukee

An analytical expression is presented for the susceptibility of liquid cast iron to solidify according to the Fe-C-X metastable system （also known as the chilling tendency of cast iron, CT）. The analysis incorporates the nucleation and growth processes associated with the eutectic transformation. The CT is related to the physicochemical state of the liquid, the eutectic cells in the flake graphite, and the number of nodules in nodular cast iron. In particular, the CT can be related to the critical wall thickness, scr, or the chill width, Wcr, in wedge shaped castings. Finally, this work serves as a guide for understanding the effect of technical factors such as the melt chemistry, the spheroidizing and inoculation practice, and the holding time and temperature on the resultant CT and chill of the cast iron. Theoretical calculations of sc, and Wc, compare well with experimental data for flake graphite and nodular cast iron.

关键词： chill chilling tendency gray cast iron nodular cast iron

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Web配色字典

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丛书名：网页设计师必读

2006年

作者：日本cis项目组邱霓霓译

本书是一本按照色系、印象风格、季节特色等各种风格交织的网页设计配色样本手册。针对内容范畴的颜色使用倾向及如何使用颜色也进行了详细的说明。配色是一个没有绝对正确的世界，根据对象的内容、使用范围，同样的颜色搭配在不同人的... 详细信息

ISBN: (纸本)7121030616

本书是一本按照色系、印象风格、季节特色等各种风格交织的网页设计配色样本手册。针对内容范畴的颜色使用倾向及如何使用颜色也进行了详细的说明。配色是一个没有绝对正确的世界，根据对象的内容、使用范围，同样的颜色搭配在不同人的眼中是有差别的，在颜色的选择上也经……

关键词：色彩主页制作

来源：畅想之星图书光盘版（南... 评论

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spinal cord injury reprograms muscle fibroadipogenic progenitors to form heterotopic bones within muscles

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Bone Research 2022年第2期10卷 310-325页

作者： Hsu-Wen Tseng Dorothée Girard Kylie A.Alexander susan M.Millard Frédéric Torossian Adrienne Anginot Whitney Fleming Jules Gueguen Marie-Emmanuelle Goriot Denis Clay Beulah Jose Bianca Nowlan Allison R.Pettit Marjorie salga françois Genêt Marie-Caroline Le Bousse-Kerdilès sébastien Banzet Jean-Pierre Lévesque Mater Research Institute-The University of Queensland WoolloongabbaQLDAustralia Institut de Recherche Biomédicale des Armées(IRBA) INSERM UMRS-MD1197 ClamartFrance INsERM UMRs-MD 1197 Universitéde Paris-SaclayHôpital Paul BrousseVillejuifFrance INsERM UMs-44 Universitéde Paris-SaclayHôpital Paul BrousseVillejuifFrance UPOH(UnitéPéri Opératoire du Handicap Perioperative Disability Unit)Physical and Rehabilitation Medicine departmentRaymond-PoincaréHospitalAssistance Publique-Hôpitaux de Paris(AP-HP)GarchesFrance Universitéde Versailles saint Quentin en Yvelines UFR Simone Veil-SantéEND:ICAP INSERM U1179Montigny le BretonneuxFrance

The cells of origin of neurogenic heterotopic ossifications(NHOs), which develop frequently in the periarticular muscles following spinal cord injuries(scis) and traumatic brain injuries, remain unclear because skeletal muscle harbors two progenitor cell populations: satellite cells(sCs), which are myogenic, and fibroadipogenic progenitors(FAPs), which are mesenchymal. Lineage-tracing experiments using the Cre recombinase/Lox P system were performed in two mouse strains with the fluorescent protein Zs Green specifically expressed in either sCs or FAPs in skeletal muscles under the control of the Pax7 or Prrx1 gene promoter, respectively. These experiments demonstrate that following muscle injury, sCI causes the upregulation of PDGFRα expression on FAPs but not sCs and the failure of sCs to regenerate myofibers in the injured muscle, with reduced apoptosis and continued proliferation of muscle resident FAPs enabling their osteogenic differentiation into NHOs. No cells expressing Zs Green under the Prrx1 promoter were detected in the blood after injury, suggesting that the cells of origin of NHOs are locally derived from the injured muscle. We validated these findings using human NHO biopsies. PDGFRα+mesenchymal cells isolated from the muscle surrounding NHO biopsies could develop ectopic human bones when transplanted into immunocompromised mice, whereas CD56+myogenic cells had a much lower potential. Therefore, NHO is a pathology of the injured muscle in which sCI reprograms FAPs to undergo uncontrolled proliferation and differentiation into osteoblasts.

关键词： progenitor injuries muscles

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N型创意屋

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建筑技艺 2009年第3期15卷 64-69页

作者： fra inc fra inc

该住宅位于日本青森县一块狭长的地块内，共分两层，占地面积34967平方米，建筑面积114.58平方米，总楼层面积194平方米，混凝土加木梁柱结构。在预算很低的情况下，设计师针对地块的特点，通过引入中间区域，将主要空间分开，在交叉口... 详细信息

该住宅位于日本青森县一块狭长的地块内，共分两层，占地面积34967平方米，建筑面积114.58平方米，总楼层面积194平方米，混凝土加木梁柱结构。在预算很低的情况下，设计师针对地块的特点，通过引入中间区域，将主要空间分开，在交叉口将空间切开，使整个空间变得透明与开放，被分开的空间变得具体有形。

关键词：创意 N型占地面积建筑面积梁柱结构青森县

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平安大华孙健：固收“猎手”的保本智慧 B09

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证券时报

作者： cis

巴菲特说永远要保本，本金就是种子，没有种子就没有果实。作为一名专注固定收益投资的投资经理，在正在发行的平安大华保本混合型基金的拟任基金经理孙健的脑中，“保本”不仅意味着一种产品的类别，更是一条不可打破的原则——做投...

巴菲特说永远要保本，本金就是种子，没有种子就没有果实。作为一名专注固定收益投资的投资经理，在正在发行的平安大华保本混合型基金的拟任基金经理孙健的脑中，“保本”不仅意味着一种产品的类别，更是一条不可打破的原则——做投资，都要遵循保本的原理。投资?

关键词：

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氧化锑的毒性研究：——阻燃剂氧化锑和其它锑化合物对人和环境危害 …

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阻燃材料与技术 2000年第5期 12-15页

作者： Agena,D fra,PAG

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Only mothers feed mature offspring in European Ceratina bees

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Insect science 2021年第5期28卷 1468-1481页

作者： Michael Mikat Jitka Waldhauserova Tereza frankova Katerina Cermakova Vojtech Broz simon Zeman Marcela Dokulilova Jakub straka Department of Zoology Faculty of ScienceCharles UniversityPragueCzech Republic Jihlava Grammar school JihlavaCzech Republic Department of Ecology Faculty of ScienceCharles UniversityPragueCzech Republic

Parental care directed to adult offspring is uncommon in *** parental care has been documented in Xylocopinae bees(Hymenoptera:Apidae).Moreover,some Ceratina bees(Xylocopinae)are known to feed mature siblings,and feeding of mature siblings is achieved by dwarf eldest daughters when mothers *** daughters are intentionally malnourished by mothers and usually originate from the first brood ***,we examined the pattern of care prov ided to young adults in three small European carpenter bees:Ceratina(Ceratina)cucurbitina,C.(Euceratina)chalybea,and C.(E.)*** of nest departures and arrivals were performed to study foraging *** detected intensive foraging behavior of mothers in all three studied ***,we did not observe regular foraging bchavior of daughters in any *** experimental removal of mothers in *** led to the emigration of young adults and did not initiate foraging activity in *** conclude that the feeding of siblings does not occur in these species unlike in the American species *** detected female-biased sex ratios in the first brood cell in *** and *** offspring in the first brood cell was smaller than other female offspring only in *** results show that a female-biased sex ratio and the small size of daughters in the first brood cell do not provide sufficient ev idence for demonstrating the existence of an altruistic daughter and also that the pattern of maternal investment is not exclusively shaped by social interactions.

关键词： foraging trip Hymenoptera maternal care provisioning sociality Xylocopinae

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法国Unimetal的新直流电弧炉

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冶钢译丛 1997年第2期 1-5页

作者： fra.,J－P 钟顺思

法国Ｇａｎｄｒａｎｇｅ的Ｕｎｉｍｅｔａｌ钢厂前不久安装了一台直流双壳电弧炉，其废钢料场物装料都适合于Ｕｎｉｍｅｔａｌ传统的订货手册，并在烟尘的排放和过滤方面作了巨大的努力。

关键词：炼钢直流电弧炉双壳炉

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Isotopic Composition of Atmospheric Precipitation in the cis-Ural Region

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Journal of Earth science 2022年第3期33卷 831-838页

作者： Alena s.Kazantseva Olga I.Kadebskaya Yuri V.Dublyansky Mining Institute of the Ural Branch of the Russian Academy of sciences PermRussia Institute of Geology University of InnsbruckInnsbruckAustria

Using the Global Network of Isotopes in Precipitation(GNIP)method at three stations in the cis-Ural region(Iskor,Perm,and Kungur),the monitoring results of the isotope composition of atmospheric precipitation conducted in 2016-2019 are *** lines of meteoric waters were obtained for each station and for the cis-Ural region as a *** latitudinal zoning of changes in isotope parameters from north to south in the cis-Ural region is noted,which is related to meteorological *** northern regions are characterized by isotopically light values compared to the southern ***,the correlation relationship between the isotopic compositions of atmospheric precipitation and meteorological parameters at each station is *** analysis data show that about 50%-90%of variations in the isotopic composition of precipitation within the annual cycle are determined by the air *** the same time,the amount of precipitation shows a relationship between the average strength and the isotopic composition of precipitation for a series of observations at Kungur station;for a series of observations at Iskor and Perm stations,there is no *** in the relationship with meteorological data are explained by different sources of moisture introduction to the station and,accordingly,the formation of the isotopic composition of *** flow of moisture is controlled by the transfer of air masses in different directions,the formation of cyclones and ***,for the northern part of the region during the year is characterized by the predominance of cyclones,whereas for the southern-anticyclones.

关键词： precipitation isotopic composition cis-Ural region correlation relationship spear-man’s correlation coefficient

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