类泛素蛋白及其中文命名

泛素家族包括泛素及类泛素蛋白,约20种成员蛋白.近年来,泛素家族领域取得了迅猛发展,并已与生物学及医学研究的各个领域相互交叉.泛素家族介导的蛋白质降解和细胞自噬机制的发现分别于2004和2016年获得诺贝尔奖.但是,类泛素蛋白并没有统一规范的中文译名. 2018年4月9日在苏州召开的《泛素家族介导的蛋白质降解和细胞自噬》专著的编委会上,部分作者讨论了类泛素蛋白的中文命名问题,并在随后的\"泛素家族、自噬与疾病\"(Ubiquitinfamily,autophagy anddiseases)苏州会议上提出了类泛素蛋白中文翻译草案,此草案在参加该会议的国内学者及海外华人学者间取得了高度共识.冷泉港亚洲\"泛素家族、自噬与疾病\"苏州会议是由美国冷泉港实验室主办、两年一度、面向全球的英文会议.该会议在海内外华人学者中具有广泛影响,因此,参会华人学者的意见具有一定的代表性.本文介绍了10个类别的类泛素蛋白的中文命名,系统总结了它们的结构特点,并比较了参与各种类泛素化修饰的酶和它们的生物学功能.文章由45名从事该领域研究的专家合作撰写,其中包括中国工程院院士1名,相关学者4名,长江学者3名,国家杰出青年科学基金获得者18名和美国知名高校华人教授4名.他们绝大多数是参加编写即将由科学出版社出版的专著《泛素家族介导的蛋白质降解和细胞自噬》的专家

IN SITU RAMAN SPECTROSCOPIC RESEARCH of Ce 0.5 Zr 0.5 O 2 SOLID SOLUTION

控制合成条件以湿化学法制备了CEzrO（n（CE）/n（zr）＝1）固溶体.Xrd结果证实催化剂前体经923k焙烧后可获得立方相CE0.5zr0.5O2固溶体.TEM观察到固溶体颗粒大小均一（d＝11nM）、分散，呈纤毛状.在氧化和还原气氛条件下分别对固溶体进行了原位拉曼光谱研究.结果表明，除450~470CM-1处出现面心立方晶格f2g拉曼活性模式对应的强拉曼谱峰外，290~320CM-1，570~620CM-1，770~790CM-1和1160~1190CM-1处分别出现弱峰或弱肩峰，各谱峰随样品处理条件改变而有不同的变化情况；固溶体的晶体结构会因氧化还原气氛以及温度等外界条件的不同发生畸变，但基本上保持为萤石构型.Ce 0.5 Zr 0.5 O 2 solid solution was prepared by wet chemical preparation method under controlled conditions.The crystal structure of the solid solution after calcination at 923 K is face centered cubic (fluorite type) verified by XRD.The solid grain is super micro powder of fiber like.Diameter of the solid solution particle is 11 nm. In situ Raman spectra of the catalyst at 323～923 K in oxygen or hydrogen atmosphere give the strong Raman peaks at 450～470 cm -1 owing to the F 2g Raman active mode characteristic of fluorite structure.The weak Raman peaks at 290～320 cm -1 , 570～620 cm -1 , 770～790 cm -1 and 1160～1190 cm -1 are also given.The Raman peaks have different changes according to the alteration of environmental conditions, such as redox atmosphere and temperature.The Raman peaks reveal that the crystal structure is deformed in the lattice by changing the external conditions, but at the same time the fluorite structure keeps unchanged.福建省自然科学基

In Situ Raman Spectroscopic Study of CeO 2 and Ce 0.5 Zr 0.5 O 2 Solid Solution

控制合成条件以湿化学法制备超细颗粒CEO2和CE0.5zr0.5O2固溶体.X射线粉末衍射证实两者皆为立方相.在氧化、还原气氛50℃到650℃条件下分别对样品进行原位拉曼光谱研究.结果发现除440~470CM-1出现面心立方晶格f2g拉曼活性模式对应的强拉曼谱峰外，220~280（290~320）、400~410和560~600（570~620）、780~840（770~790）及1150~1180（1160~1190）CM-1分别出现弱拉曼谱峰.这些弱拉曼谱峰由不同原因引起的晶体结构改变造成.CEO2和CE0.5zr0.5O2固溶体的各拉曼弱峰变化情况不同.弱拉曼谱峰的存在及变化趋势揭示了CEO2和固溶体的结构特征，同时也反映了CE0.5zr0.5O2固溶体具有比CEO2更高催化性能的结构方面的因素CeO 2 and Ce 0.5 Zr 0.5 O 2 solid solution were prepared by wet chemical preparation method. Their crystal structures are face centered cubic(fluoritetype), verified by powder X ray diffraction. In situ Raman spectra of the catalysts from 50 to 650℃ in oxygen and hydrogen atmosphere show the 440～470 cm -1 strong Raman peaks due to the F 2g Raman active mode of fluorite structure materials. 220～280(290～320), 400～410 and 560～600(570～620), 780～840(770～790) and 1 150～1 180(1 160～1 190) cm -1 weak Raman peaks are also present. These weak Raman peaks originated from the disorder of crystal structures with different reasons. The Raman peaks of CeO 2 and Ce 0.5 Zr 0.5 O 2 solid solution have different changes with the alteration of environmental conditions. Characterization of CeO 2 and Ce 0.5 Zr 0.5 O 2 solid solution can be given from the weak Raman peaks. These peaks also reveal the structural reasons of higher catalytic reactivity and larger oxygen storage capacity of the Ce 0.5 Zr 0.5 O 2 solid solution.福建省自然科学基

Synthesis and Crystal Structure of Protonated Sodium Potassium Dimeric(citrato)dioxovanadium(V)

联系人及第一作者: 周朝晖 男,32岁,副研究员.[中文文摘]合成了含质子柠檬酸氧钒（V）配合物中间体NaK3[VO2（Hcit）]2·7H2O，用红外光谱和X射线衍射进行了结构表征．结果表明：晶体属单斜晶系，P21／n空间群．晶胞参数a＝1．1258（2）nm，b＝1．5774（3）nm，c＝1．6559（1）nm，β＝98．568（9）°，V＝2．908（1）nm3，Z＝4，Dc＝1．851g·cm－3，F（000）＝164。μ（CuLα）＝104．7cm-1．晶体结构中的二聚柠檬酸氧钒阴离子具有准对称中心，钒原子间的距离已超出钒-钒原子簇的单键键长．阴离子内含有准对称的V2O2四元环，环外有2个柠檬酸根配体通过连接O（1，11）桥原子和α-羧基上单齿配位的氧原子（O2，O12）形成五元环，柠檬酸以独特的羟基和α-羧基同钒双齿配位。[英文文摘]The titled complex NaK3 [VO2 (Hcit)]2. 7H2O (H4cit=citric acid) has been pre-pared and characterized by X-ray diffraction. It crystallizes in monoclinic space group P21/n with unit cell parameters:a = 1.125 8(2) nm, b=1. 577 4(3) nm, c=1. 655 9(1) nm, β=98. 568 (9)°and Dc = 1.851 g. cm-3, Z=4. Each dimer contains a quasi-centrosymmetric planar four-member V2O2 ring with two exocyclic citrate entities coordinated by the oxygen atoms of the hydroxy- and a-carboxylate ligand, while the other two β-carboxylate groups remain uncomplexed as its deprotonated and protonated citratovanadate(V).国家科学技术委员会及国家自然科学基

柠檬酸钒(Ⅳ)酰钡热分解制备焦钒酸钡Ba_2[VO(cit)]_2·4H_2O纯相

由柠檬酸钒酰钠与氯化钡的水溶液反应得到柠檬酸钒 ( )酰钡配合物 .通过凝胶扩散法得到该配合物的晶体 ,并用 X射线衍射测定其结构 .该晶体的空间群为 P2 1 n,晶胞参数 a=0 .9896 0 ( 9) nm,b=0 .87746 ( 5) nm,c=1 .2 1 0 75( 8) nm,β=93.1 1 9( 7)°,Z=2 ,R=0 .0 45.该配合物在空气中分解得到白色粉末 ,经 XRD粉末衍射分析确定为焦钒酸钡纯相

STUDY of ULTRAFINE CUBIC Ce_(0.5)Zr_(0.5)O_2 SOLID SOLUTION

以共沉淀法制备CE-zr-O固溶体,在液相反应阶段、干燥阶段和灼烧阶段分别采取快速喷射和加入表面活性剂、正丁醇共沸蒸馏脱水以及选择适当的灼烧温度等手段控制团聚体的生成.制得超细颗粒CE_(0.5)zr_(0.5)O_2固溶体.Xrd,TEM及比表面积等的测试结果表明,该催化剂是面心立方结构、较高比表面的超细颗粒.zr--(4+)掺杂较均匀的超细固溶体,其rAMAn光谱中晶格畸变带来的T_(2g)活性振动模式分裂谱峰较弱,说明晶体结构规整性较大.催化甲烷燃烧的活性测试结果也证实超细颗粒CE_(0.5)zr_(0.5)O_2固溶体的催化活性大于常规共沉淀法制备的催化剂.Ce-Zr-O solid solution was prepared by coprecipitation with control of agglomeration.Ce4+ and Zr4+ mixed solution was spurted into the precipitant of surfactant added in the stage of reaction of liquid phase.After elimination of water by means of heterogeneous azeotropic distillation process with n-butanol,the powder was calcined at different temperatures.The result mixed oxide is face-centered cubic analyzed by XRD.The solid solutions are fiberlike ultrafine particles from TEM pictures.The super-micro particles have larger specific surface than the particles prepared by common coprecipitation.In the Raman spectra,splitting peaks of t2g active vibration mode resulted by distorted lattice are weaker than the samples prepared by common coprecipitation process.Raman spec-troscopic research show that the crystal structure of the ultrafine solid solution has better degree of order and Zr4+ ion enters into the lattice more even.Super-micro powder of Ce0.5Zr0.5O2 solid solution is more active to catalyze the combustion of methane than the catalyst synthesized by common coprecipitation method

Synthesis and crystal structure of protonated sodium potassium dimeric(citrate) dioxovanadium(V)

The titled complex NaK3[VO2(Hcit)](2) . 7H(2)O(H(4)cit=citric acid) has been prepared and characterized by X-ray diffraction. It crystallizes in monoclinic space group P2(1)/n with unit cell parameters: a=1.125 8(2) nm, b=1.577 4(3) nm, c=1.655 9(1) nm, beta= 98.568 (9)degrees and D-c =1.851 g . cm(-3), Z=4, Each dimer contains a quasi-centrosymmetric cm planar four-member V2O2 ring with two exocyclic citrate entities coordinated by the oxygen atoms of the hydroxy- and alpha-carboxylate ligand, while the other two beta-carboxylate groups remain uncomplexed as its deprotonated and protonated citratovanadate(V)

PREPARATION of La_2O-3-ZrO_2 OXIDE COMBUSTIONAL CATALYST WITH DEFECTIVE FLUORITE STRUCTURE

缺陷萤石型lA_2Q_3-zrO_2固溶体的催化燃烧活性受制备条件的影响,本文通过对其共沉淀前体的表面结构和热分解过程的分析,发现共沸蒸馏的办法可以有效地控制前体表面羟基的缩合过程,减少团聚,保持前体中金属离子均匀分散,为生成缺陷有序的烧绿石型的lA_2zr_2O_7复氧化物提供了可能,复合氧化物固溶体的表面阳离子配置情况与样品的催化氧化性能密切相关,软团聚前体的烧结产物对甲烷燃烧反应具有更高的催化活性。One of the most important factors which affect the catalytic performances of complex oxide used in catalytic combustion is the preparative process of samples.Combined with several spectrum techniques, the study on the thermal decomposing procedure of the coprecipated precursors illustrates that the catalytic activity of La2O3-ZrO2 composite oxide solid solution is intimately concerned with drying condition, due to the different crystallization therein.The codistillation involved n-butanol could keep the uniform distribution of metal cations in precursor intact, and facilitates acquiring the well-crystallized sample by following thermal treatment.These crystalline with regular lattice will supply more anion defects on the surface, which act as the active sites for the complete oxidation of hydrocarbon

Barium pyrovanadate prepared from thermal decomposition of barium dimeric(citrato) oxovanadium(IV)

Barium dimeric(citrato)oxovanadium(IV) tetrahydrates Ba-2 [VOcit)](2) . 4H(2)O has been prepared by the reaction of sodium dimeric (citrato)oxovanadium (IV) and barium chloride, Its single crystal was obtained by diffusion method in silica-gel, The complex crystallizes in monoclinic space group P2(1)/n with unit cell parameters: a = 0.989 60(9) nm, b = 0.877 46(5) nm, c = 1.210 75(8) nm, beta = 93.119(7)degrees, Z = 2, R = 0.045 for 1 260 reflections with I greater than or equal to 3 sigma(I). Thermal decomposition shows the barium salt undergoes with three major processes, including dehydration, ligand elimination and formation of mixed oxide as its final step, in which the latter is confirmed as pure phase of barium pyrovanadate by XRD analysis