Extraction of Th（IV） from nitric acid with 40—benzoyl—2,4—dihydro—5—methyl—2—phenyl—3H—pyrazol—3—thione

The BMPPT(4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione)was synthesized from BMPP.Its m.p.is 106-108℃,The results of the element analysis are as follows:C,68.51%,H,4.51%,N,9.26%,S.11.47%,which are in conformity with the theoretical value(C,69.15%,H,4.76%,N.9.52%,S.10.90%),The solvent extraction of Th^4 from nitric acid solution by BMPPT in benzene was studied.The extraction ability of BMPPT is not so high as that of its parent (BMPP).The Th^4 distribution ratio(DTh)in creases with the increasing pH of the aqueous phase,and pH1/2 for Th^4 was 3.2([BMPPT]=0.10mol/L),When the pH increases,the distribution ratio of Th^4 increasdes linearly with the slope of 1.59,When the concentration of BMPPT increases,the distribution ratio of Th^4 increases rapidly.The lgDTh-lg[BMPPT]is linear with the slope of 1.42 and the extraction mechanism is the cation ion-exchange.     

SYNTHESIS OF THE RING—AND SIDE—CHAIN—~(14)C—LABELED 1,2—BIS—(4—MORPHOLINOMETHYL—3,5—DIOXOPIPERAZIN—1—YL) PROPANE

The ring-and side-chain-~(14)C-labeled probimane, 1,2-bis (4-morpholinomethy1-3,5-dioxopiperazin-1-yl) propane were synthesized from acetic acid-1-~(14)C in 4 steps and from ~(14)C-formaldehyde in 1 step respectively. The radiochemical yeild for the ring labeling was 28.1%; for the side-chain labeling was 18.5%.     

Development of Thermodynamic Database for U—Zr—Fe—O—B—C—FPs System

A thermodynamic corium database using ionic two-sublattice model for liquid was developed and stratification of molten corium, supposed to occur in in-vessel retention accident management, was analyzed. The database consists of U—Zr—Fe—O—C—B–(FP oxides) system. Fundamentally, data were obtained from existing assessed databases, such as SGTE's. The liquid phase data were reconstructed based on the ionic model and lacking data including excess energies were assessed to be consistent with existing phase diagrams. Liquidus temperatures measured under OECD RASPLAV project were analyzed with the database. In addition, an analysis of corium under a severe accident condition was carried out and demonstrates that the database gives an improved method based on thermodynamics to analyze the corium stratification.     

1—[2—^3H[（2—羟基—3—甲氧丙基）—2—硝基—1H—咪唑的制备

以ＮａＢ＾３Ｈ４还原１－（２－氧－３－甲氧丙基）－２－硝基－１Ｈ－咪唑制得１－「２－＾３Ｈ」（２－羟基－３－甲氧丙基）－２－硝基－１Ｈ－咪唑。产品经硅胶－Ｈ柱洗脱，蒸馏，Ｓｅｐ－Ｐａｋ Ｃ１８柱处理，并经ＨＰＬＣ及液闪检测，化学纯度〉９９．９％，放射化学纯度〉９７％，比活度为１６．０５ＴＢｑ／ｍｏｌ。     

EPR——欧洲压水堆

1 引言 2050年，地球上的人口将会达到80～100亿，与现在60亿人口的数字相对照，他们当中几乎有20亿人没有电力供应!能源需求将会相当大地增加，因为人类总是会自然地追求生活条件的改善，而且渴望均等共享经济进步带来的更多好处。     

超声波法合成2—^18F—2—脱氧—β—D—葡萄糖的初步研究

采用超声波法合成2-^18F-2-脱氧-β-D-葡萄糖（^18F-FDG）,以提高其合成效率。实验结果表明：F取代前体2位上亲核反应进行的程度与相转移催化剂和温度有关。无相转移催化剂时,84℃超声反应10min,亲核反应进行了70%;而在10mg的K2.2.2存在下,室温（22℃）下超声反应10min,亲核反应进行了85%,在84℃下超声反应2min,亲核反应进行了95%。同经典方法相比,超声波合成法^18F-利用率提高了10%,反应管的放射性吸附下降了5%。超声法合成效率（EOS）为60%,校正校率(EOB）为78%,合成时间为40min。仅用一根C-18纯化柱纯化,超声法合成的^18F-FDG中^18F^-含量低于1%。因此,采用超声波法合成^18F-FDG可明显提高合成效率。     

^111In—DTPA—D—Phe^1—oetreotide的动物实验

Ｓｏｍａｔｏｓｔａｔｉｎ受体阳性肿瘤显像剂＾１１１Ｉｎ－ＤＴＰＡ－Ｄ－Ｐｈｅ＾１－ｏｃｔｒｅｏｔｉｄｅ在体内降解产物为＾１１１Ｉｎ－ＤＴＰＡ，给经后３ｈ血中＾１１１Ｉｎ－ＤＴＰＡ占血中放射性的５０％，尿中为４０％，正常鼠与载胰腺癌裸鼠的动物实验表明，该显像剂的血液清除很快，注射后１０ｍｉｎ血液的％ＩＤ／ｇ为注射后１ｍｉｎ的５０％，放射性主要从泌尿系统排泄，给药后４ｍｉｎ膀胱显影，至３０ｍｉｎ双肾和     

3—（2—苯基—2—环戊基—2—羟基乙氧基）[3—^3H]喹宁环烷的制备

以喹宁环酮催化氚化制得「３－＾３Ｈ」喹宁环醇，然后与１－苯基－１－环戊基环氧乙烷反应制香３－（２－苯基－２－环戊基－２－羟基乙氧基）「３－＾３Ｈ」喹宁环烷。产品放射性比活度为７４０ＴＢｑ／ｍｏｌ，放射化学纯度〉９５％。     

^125I—睾丸酮—3—（对—羟基苯乙酰）腙的制备

睾丸酮－３－（对－羟基苯乙酰）腙（Ｔ０－３－ＨＰＡＨ）经元素分析、红外光谱、核磁共振谱和质谱分析确证结构，采用氯胺Ｔ法，用Ｎａ＾１２５Ｉ标记，标记率高于８５％，标记物室温存放５０天后，放化纯略有下降，用氯仿一次萃取后，放化纯高于９５％。