Preparation of TiO2 Film through Hydrolysis of Titanium Butoxide and Interaction between Sensitizing Dyes and the Film

A method of preparation of stable, homogeneous and controlled thickness TiO2 film through hydrolysis of Ti(OC4H(9))(4) is introduced in detail. The structure and property of the film have been investigated by means of SEM and FT-IR techniques. The strong quenching effect between sensitizing dyes and TiO2 film is observed in their fluorescence spectra.

SYNTHESES AND CRYSTAL STRUCTURES OF THE COMPLEXES OF RARE EARTH WITH FUMARIC ACID

Six compounds of M2F3 center dot 1.2H(2)O (M=EU, Ga, Tb, Y, Er, LU: H2F=Fumaric acid) have been synthesized. The structures of Eu(III), T b(III), Y(III), Er(III) and Lu(III) compounds have been determined by singal crystal X-ray diffraction method. The complex of Eu(III) crystallizes in tri-clinic space group P (1) over bar, and the coordination number of Eu3+ is ten. The other four complexes crystallize in monclinic space P2(1)/c, and the coordination numbers of the metal ions are eight. Each of the complexes shows a three-dimensional net structures.

反丁烯二酸稀土配合物的合成及晶体结构

合成了反丁烯二酸C_4H_4O_4与六种稀土(Eu,Gd,Tb,Y,Er,Lu)的配合物M_2F_3·12H_2O(H_2F=C_4H_4O_4).用X 射线衍射法测定了它们的晶体学参数,并测定了其中五种配合物的结构.指出存在两类不同的结构,其中铕配合物为三斜晶系,空间群P(?),铕离子配位数为10.(?)、钇、铒、镥配合物为单斜晶系,空间群为P2_1/c,配位数为8.配合物均具有三维网状结构.

STUDIES ON INTERFACIAL PHENOMENA OF POLYCRYSTALLINE HG1-XCDXTE THIN-FILM ELECTRODE POLYSULFIDE REDOX SOLUTION

Electrode capacitance and photocurrent spectra of electrodeposited polycrystalline Hg1-xCdxTe thin films of varying (1-x) were measured in polysulfide redox solution, hence the flatband potentional PHI(fb) and the bandgap E(g) of Hg1-xCdxTe thin films obtained. It was of interest to find out that only the location of conduction band E(c) shifts negatively with increasing (1-x) while the valence band E(v), is almost constant. The experimental open circuit photovoltage V0 is smaller than theoretical value V(max) calculated through flatband potential PHI(fb), therefore there is a possibility of promoting the experimental open circuit photovoltage.

SYNTHESIS AND CRYSTAL-STRUCTURE OF THE TRIS(CYCLOPENTADIENYL)PHENYL COMPLEX OF NEODYMIUM, (LI-BULLET-3DME)[(ETA-5-C5H5)3NDC6H5]

(Li.3DME)[eta(5)-C5H5)3NdC6H5], 1 was synthesized by the reaction of NdCl3.2LiCl, 2 equivalents of cyclopentadienylsodium and one equivalent of phenyllithium in THF at -78-degrees-C, and crystallized from THF and DME. The crystal structure of 1 was determined by X-ray diffraction method at -80-degrees-C. The crystal of 1 is triclinic, space group P1BAR with a = 15.752(6), b = 16.232(3), c = 23.038(7) angstrom, alpha = 108.81(2), beta = 93.31(3), gamma = 108.38(2)-degrees, Z = 6 and D = 1.33 g/cm3. Least-squares refinement (5732 observed reflections) led to a final R of 0.053. The complex consists of disconnected ion pairs of (Li.3DME)+ and [(eta(5)-C5H5)3NdC6H5]-. The neodymium atom was connected to three eta(5)-bonded cyclopentadienyls and one sigma-bonded phenyl in a distorted tetrahedral arrangement with Nd-C(sigma-) 2.593(17), 2.613(13) and 2.601(13) angstrom.

多晶Hg_(1-x)Cd_xTe薄膜电极 多硫氧化还原电对溶液的界面现象研究

测量了系列(1-x)值的电沉积多晶Hg_(1-x)Cd_xTe薄膜电极在多硫氧化还原电对溶液中的交流阻抗和光电流光谱,据此确定出不同(1-x)值时的平带电位Φ(?)和禁带宽度E(?).当(1-x)值增大时,平带电位正移,禁带宽度E(?)变小,导带位置下降(负移),价带位置基本保持不变.系列Hg_(1-x)Cd_xTe薄膜电极在多硫溶液中的开路光电压比由平带电位Φ_(fb)推算出的极限开路光电压低,因此存在着提高实际开路光电压的潜力.

Assembly of the protoplasm of Codium fragile (Bryopsidales, Chlorophyta) into new protoplasts

The cell organelles of the coenocytic alga Codium fragile (Sur.) Hariot aggregated rapidly and protoplasts were formed when its protoplasm was extruded out in seawater. Continuous observation showed that there were long and gelatinous threads connecting the cell organelles. The threads contracted, and thus the cell organelles aggregated into protoplasmic masses. The enzyme digestion experiments and Coomassie Brilliant Blue and Anthrone stainings showed that the long and gelatinous threads involved in the formation of the protoplasts might include protein and saccharides as structure components. Nile Red staining indicated that the protoplast primary envelope was non-lipid at first, and then lipid materials integrated into its surface gradually. The fluorescent brightener staining indicated that the cell wall did not regenerate in the newly formed protoplasts and they all disintegrated within 72 h after formation. Transmission electron microscopy of the cell wall of wild C. fragile showed electron-dense material embedded in the whole cell wall at regular intervals. The experiments indicated that C. fragile would be a suitable model alga for studying the formation of protoplasts.

海浪、天文潮与风暴潮耦合数值模拟研究

本文研究了国际上刚刚兴起的海浪，天文潮及风暴潮耦合数值模式，考虑了天文潮与风暴潮的相互作用对海浪的影响（简称TSW）。研究表明，TSW的影响依不同的时间、地点和风力强弱而不同，在某些时刻和地点，TSW对波高的影响超过1M，对波向的影响达30#deg#。WTS的影响对天文潮与风暴潮耦合水位起调制作用，在风暴发生初期大一些，后期小一些。

A study of electrical chloride extraction of iron artifacts

The chloride extraction rule of iron artifacts was studied by electrical methods. The effect of the current and potential value on the desalination result of simulated iron artifacts was studied through the galvanostatic and potentiostatic experiments the ingredients of the rust before and after treatments were also analyzed by the X-ray diffraction (XRD). It has been found that the optimal current density was between -0.50 and -0.75 mA/cm(2) and the optimal potential was between -1.175 and -1.200 V. The phase of the samples rusts transformed after treatment, as well as the anti-corrosion performance improved.

青海省阿尼玛卿山地区植物区系研究

阿尼玛卿山地区位于青海省东南部,约占北纬33°25′～ 36°20′,东经98°50′～102°25′.本地区共有种子植物56科、251属、752种.区系特征如下:(1)种类相对较少,特有属相对较多;(2)以北温带为主的温带性质明显;(3)在种一级水平上,以中亚成分和东亚成分,特别是其中各自联系着喜马拉雅的变型成分为主的分布,形成了区内以欧亚大陆温、寒地带典型成分为优势的、明显的温带性质及其高原、高山分布的特点;(4)植物的生活型以多年生草本为主,木本种较少,乔木更少;(5)在中国特有种的分析中,本区系与横断山和甘肃南部区系的联系最为密切;(6)生态环境对本区系特征的塑造表现为高寒生态因子的选择和高山特化的作用强烈,而在一定程度上湿冷生性质和寒旱生性质的高山特化作用更为明显;(7)表现出青藏高原植物区系的衍生性和年轻性;(8)植被以由嵩草属植物为建群种的高寒草甸和由金露梅、山生柳等分别为建群种的高寒灌丛为主;(9)以绿绒蒿等所体现的地区特色明显.综上所述,本区同唐古特地区在区系性质和特点等方面基本一致,所以,本地区不仅是唐古特地区植物区系中的一个具有代表性的区系之一,而且是其核心区系之一.

青海湖区针茅草原植物群落特征及群落多样性研究

根据样方调查资料，采用聚类分析法，研究了青海湖区针茅草原围栏封育后植物群落特征及群落多样性变化。结果表明，草原经过长期围栏后，群落内优势种发生了不同程度的分异，由围栏外的紫花针茅(Stipa purpurea)+青海苔草(Carex ivanovae)草原演变成围栏内的冷地早熟禾(Poa crymophila)+猪毛蒿(Artemisia scoparia)草原群落，导致了群落结构特征的变化；长期的围栏活动对提高草原群落的盖度和生产能力是有益的，但却降低了群落的物种丰富度和多样性；草原开垦后，对周围草原有明显的影响，所形成土垄的群落特征和多样性变化都发生了极大的差异，成为赖草(Leymus secalinus)+大籽蒿(Atremisia sieversiana)群落类型，群落的物种丰富度和多样性均降低。

Summer diet of two sympatric species of raptors Upland Buzzard (Buteo hemilasius) and Eurasian Eagle Owl (Bubo bubo) in alpine meadow: problem of coexistence

Summer diets of two sympatric raptors Upland Buzzards (Buteo hemilasius Temminck et Schlegel) and Eurasian Eagle Owls (Bubo bubo L. subsp. Hemachalana Hume) were studied in an alpine meadow (3250 m a.s.l.) on Qinghai-Tibet Plateau, China. Root voles Microtus oeconomus Pallas, plateau pikas Ochotona curzoniae Hodgson, Gansu pikas O. cansus Lyon and plateau zokors Myospalax baileyi Thomas were the main diet components of Upland Buzzards as identified through the pellets analysis with the frequency of 57, 20, 19 and 4%, respectively. The four rodent species also were the main diet components of Eurasian Eagle Owls basing on the pellets and prey leftovers analysis with the frequency of 53, 26, 13 and 5%, respectively. The food niche breadth indexes of Upland Buzzards and Eurasian Eagle Owls were 1.60 and 1.77 respectively (higher value of the index means the food niche of the raptor is broader), and the diet overlap index of the two raptors was larger (C-ue = 0.90) (the index range from 0 - no overlap - to I - complete overlap). It means that the diets of Upland Buzzards and Eurasian Eagle Owls were similar (Two Related Samples Test, Z = -0.752, P = 0.452). The classical resource partitioning theory can not explain the coexistence of Upland Buzzards and Eurasian Eagle Owls in alpine meadows of Qinghai-Tibet Plateau. However, differences in body size, predation mode and activity rhythm between Upland Buzzards and Eurasian Eagle Owls may explain the coexistence of these two sympatric raptors.

智能制模壳自动化生产线的设计与实现

为了提高铸造业中模壳制造加工的自动化程度和工作效率，降低人工制造过程中有害粉尘对身体造成的伤害，本文介绍了一种智能制模壳自动化生产线的设计.该生产线主要由上位机、机器人、PLC等共同完成控制，其中上位机控制模壳的工艺参数，并监控整个生产线的运行情况；PLC控制砂桶和浆桶的转动，负责机器人和上位机之间信号通讯；机器人负责模壳的加工.经过实践验证，这套生产线基本实现了模壳制造的自动化加工，大大提高了工作效率，保护了操作人员的健康。