The VUV spectra properties of (Y,Gd)BO3 : Eu

The (Y, Gd) BO3 : Eu phosphor was synthesized by solid-state reaction, The UV spectra showed that in a certain range of Gd3+ concentration, more Gd3+ absorbed energy and transferred it to Eu3+ with its increasing concentration. From the spectra in VUV region, it was observed that both the doping and the concentrations of Gd3+, Eu3+ greatly affected the absorption of the host lattice. The absorbances at 147 nm and 170 nm increased when the Gd3+ was doped which can be explained as that Gd3+ transferred energy to BO4. The optical properties of (Y, Gd)BO3 : Eu were the best when the concentration of Eu3+ was about 0.04.

[Li(THF)_4][Nd(C_8H_8)_2]·2THF的合成及晶体结构

无水NdCl_3与甲基萘锂以1:2摩尔比在THF中反应分离得到一种黑色产物,该产物与环辛四烯反应,分离得到标题化合物,测定了这一新配合物的晶体结构。该晶体属单斜晶系,空间群P2/c,晶胞参数a=1.7858(7)nm,b=1.3243(4)nm,c=1.8085(6)nm,β=106.52(4)°,V=4.10nm~3,D_c=1.268 g/cm~3,Z=4,F(000)=1660,R=0.0774,R_w=0.0733。配合物分子由不相连的阴阳离子对组成,阴离子是由中心钛离子与二个对称的环辛四烯组成,阳离子是由一个锂离子和四个THF分子配位而成,另有二个THF分子作为填充分子存在于晶胞中。

Isolation, characterization and electron microscopic single particle analysis of the NADH : ubiquinone oxidoreductase (complex I) from the hyperthermophilic eubacterium Aquifex aeolicus

The proton-translocating NADH:ubiquinone oxidoreductase (complex I) has been purified from Aquifex aeolicus, a hyperthermophilic eubacterium of known genome sequence. The purified detergent solubilized enzyme is highly active above 50 degreesC. The specific activity for electron transfer from NADH to decylubiquinone is 29 U/mg at 80 degreesC. The A. aeolicus complex I is completely sensitive to rotenone and 2-n-decyl-quinazoline-4-yl-amine. SDS polyacrylamide gel electrophoresis shows that it may contain up to 14 subunits. N-terminal amino acid sequencing of the bands indicates the presence of a stable subcomplex, which is composed of subunits E, F, and G. The isolated complex is highly stable and active in a temperature range from 50 to 90 degreesC, with a half-life of about 10 h at 80 degreesC. The activity shows a linear Arrhenius plot at 50-85 degreesC with an activation energy at 31.92 J/mol K. Single particle electron microscopy shows that the A. aeolicus complex I has the typical L-shape. However, visual inspection of averaged images reveals many more details in the external arm of the complex than has been observed for complex I from other sources. In addition, the angle (90degrees) between the cytoplasmic peripheral arm and the membrane intrinsic arm of the complex appears to be invariant.

氢氧化锂存在下（焦）脱镁叶绿酸-a甲酯的空气重排反应

在氢氧化锂存在下，脱镁叶绿酸-a甲酯（1a）发生空气氧化和重排反应，经盐酸酸化和重氮甲烷甲基化，得到由紫红素-7三甲酯（2）、紫红素-18甲酯（3）、卟吩-P6三甲酯（4）、地质卟啉衍生物（5）和3-环氧乙基-3-去乙烯基紫红素-18甲酯（6）所组成的混合物．用相同的方法处理焦脱镁叶绿酸-a甲酯（1b），则分离出13^2-氧代焦脱镁叶绿酸-a甲酯（7）、15-甲酰基紫红素-5二甲酯（8）、紫红素-18甲酯（3）和3-环氧乙基-3-去乙烯基紫红素-18甲酯（6）-所得新叶绿素衍生物5，6和8的化学结构均经UV，IR，^1H NMR及元素分析得以证实，并对相应的反应提出可能的反应机理．

不同去甲肾上腺素剂量下布氏田鼠非颤抖性产热比较

非颤抖性产热是小型哺乳动物的一种重要产热方式。关于其定量测定，一般采用注射去甲肾上腺素（norepinephrine，NE）诱导的最大耗氧量的方式获得。因此，去甲肾上腺素剂量的选择就显得很重要。我们利用常用的3种经验公式计算剂量，即：（1）NE（mg／kg DK）=2．53W^-0．4；（2）NE（mg／kg）=3．3W^0.458；和（3）NE（mg／kg）=6．6W^0.458,W是体重（g），以布氏田鼠为实验对象，测定了3种剂量诱导的非颤抖性产热情况。结果表明，3种剂量都能诱导出最大非颤抖性产热能力，在非颤抖性产热大小上没有显著性差异，分别为6．190±1．342（公式1）、6．166±0．852（公式2）和7．005±1．501（公式3），但公式（3）剂量下体温增加程度显著高于前两个剂量，分别增加了1．9±0．9℃（公式3）、0．9±0．2℃（公式1）和0．7±0．2℃（公式2）。为了防止动物体温过高引起死亡，我们推荐公式（1）和（或）（2）。

最优控制具有非完整性的两轮驱动机器人小车

研究了移动机器人反馈控制问题．这里所考虑的机器人是一个两轮驱动的具有非完整性的移动机器人小车．考虑了笛卡儿空间中轨线跟踪问题的扩展．且表明只要参考小车保持运动，在虚设的参考小车位形周围的小车位形的稳定成为可能．提出了最优控制律并给出了仿真结果。

鄂尔多斯盆地东部地区奥陶系马家沟组沉积相与储层特征研究

Ordos Basin is one of the primary bases for petroleum exploration in our country. A series of Ordovician large gas fields were discovered, which suggest that the Lower Paleozoic carbonate, especiallly for Ordovician carbonate rocks, preserve plenty of hydrocarbon resources. Well Longtong 1 is studied as the typical exploration well. Acorrding to the specific research on the type of lithology, texture, structure and sedimentary sequence in Ordovician Majiagou Formation as well as additional data from another 20 wells, the sedimentary model has been built in Majiagou Formation. The sedimentary characteristics for each Member in Majiagou Formaiton and the feature of distribution are well understood as below: It suggests that period of Member 1, Member 3 and Member 5 in Majiagou Formation characterize with dry and hot climate as well as drop of the sea level. The area of Well Longtan 1 in the eastern basin is abundant of platform evaporite lithofacies with the depositional anhyrock and salt rock, whereas yield a suite of dolomite intercalated by the thin layers of anhyrock from the anhyrcok-dolomite platform sediment. It deposits muddy dolomite, dolomitic limestone and fine-grain dolomite in limestone-dolomite platform and restricted sea. During the stage of Member 2 and Member 4 in Majiagou Formation, the climate is wet and hot with increasing sea level. The study region occurs limestone with little dolomite in the open sea environment; but the margin area is the restricted sea settings with interbeding dolomite and limestone. Based on the thin section identification, element and isotope analysis as well as the study of texture and structure, it sugguests that the main reserviors are dolomite while the gypsum are major cap rocks. The Member 2 in Majiagou Formation is both the source rocks and the resveroirs; gypsum rocks widely occur in Member 3 as the better cap; similar to the Member 2, the Member 4 in Majiagou Formation is both the source rocks and the resveroirs; there are two source-reservoir-cap assemblages in the Member 5 alone and the cap is gypsum with high quality and great thickness, which is a favorite source-reservoir-cap assemblage.

鲁西临朐地区中生代铁寨杂岩体的岩石化学与地球化学特征及其成因研究

The Tiezhai intrusive complex is located in the north of the Luxi block, Shandong province, eastern China. It lies ～30 km west of the Tanlu fault, and is at the cross of the Wujing and Jiushan faults. The Tiezhai complex was formed about 120～130 Ma, when large-scale magmatism was active in eastern part of North China. This paper carries out petrochemical and geochemical study on the Tiezhai intrusive complex, and discusses its genesis in detail. The Tiezhai intrusive complex can be subdivided into three rock series. The first is the gabbro-diorite series formed in early stage. Its composition variation shows 01 and Cpx fractional crystallization trend. The second is the porphyritic diorite and monzonite series, showing dominating Hb fractional differentiation. Their composition variation shows Hb fractional crystallization trend. The third is the porphyritic quartz monzonite with K-feldspar megacrysts, showing weakly Hb and Bi fractional crystallization trend. All types of rocks in the Tiezhai complex are belonging to the high-K cac-alkaline series. They have elevated Sr (450-1660 ppm), Ba (210-1780 ppm) and relatively low Rb (30-100 ppm). For the gabbro-dioritic rocks in the early stage, the abundances of Ni (20-250 ppm), Cr (50-350 ppm), V(l30-250 ppm) and Co (20-40 ppm) are high, indicating a mantle origin. All rocks have negative anormalies of Nb, Ta, Ti and P, and enriched LREE and strong differentiated REE patterns. The porphyritic monzonites and quartz monzonites have very low HREE, Yb and Y contents and positive Eu anormalies, similar to adakite. Most rocks have lowε_(Nd)(t) of-1.5～-10.9, and high (~(87)Sr/~(86)Sr)_i of 0.704～0.709. The data have characters of enriched lithosphere mantle (EMI). In summary, the Tiezhai intrusive complex was inferred to be generated by a mantle derived magma through fractional crystallization. When the primary magma gathered in some place between crust and mantle, the crystallization started and causing magma evolution. The remaining / evolved magma ascended and emplaced again and again in the upper crust in Tiezhai area. Then Tiezhai complex formed. The porphyritic monzonites and quartz monzonites have major and trace element characters of typical adakite, but they are likely to be generated by Hb fractional crystallization.

贵州百花湖表层水中不同形态汞的分布规律

均匀布点采集百花湖表层水样44个, 对水样不同形态汞含量进行了分析, 并现场测定水质参数采用经典统计学与半变异函数拟合相结合的方法, 研究了百花湖表层水中不同形态汞含量的空间变异性根据半变异函数拟合的结果, 在ArcGIS软件的支持下进行克立格插值, 以此来揭示百花湖表层水中不同形态汞含量的空间分布规律研究表明百花湖表层水中的汞污染主要来自上游, 随水体流动汞污染减少但也有一些区域可能因富营养化而使颗粒态汞和总汞含量增加

What influences the timing of the introduction of solid food to infants?

The aim of the present study was to assess the factors which may influence the timing of the introduction of solid food to infants. The design was a prospective cohort study by interview and postal questionnaire. Primiparous women (n 541) aged between 16 and 40 years were approached in the Forth Park Maternity Hospital, Fife, Scotland. Of these, 526 women agreed to participate and seventy-eight were used as subjects in the pilot study. At 12 weeks we interviewed 338 women of the study sample. The postal questionnaire was returned by 286 of 448 volunteers. At 12 weeks 133 of 338 mothers said that they had introduced solids. Those that said that they had introduced solids early (<12 weeks) were compared with those who had introduced solids late (>12 weeks) by bivariate and multiple regression analysis. Psychosocial factors influencing the decision were measured with the main outcome measure being the time of introduction of solid food. The early introduction of solids was found to be associated with: the opinions of the infant's maternal grandmother; living in a deprived area; personal disagreement with the advice to wait until the baby was 4 months; lack of encouragement from friends to wait until the baby was 4 months; being in receipt of free samples of manufactured food. Answers to open-ended questions indicated that the early introduction appeared to be influenced by the mothers’ perceptions of the baby's needs. Some of the factors influencing a woman's decision to introduce solids are amenable to change, and these could be targeted in educational interventions.

Rural Housing, Affordable Housing and Speaking the Language of an Unaffordable Hearth

Huws, Catrin, 'Rural Housing, Affordable Housing and Speaking the Language of an Unaffordable Hearth', Journal of Planning and Environment Law, (2007) pp.1648-1660 RAE2008

Towards national identities: Welsh theatres

Williams, Ioan. 'Towards national identities: Welsh theatres', In: The Cambridge History of British Theatre, (Eds) Kershaw, Baz., Cambridge University Press, 2004, pp.242-272 RAE2008