五种引种栽培的贵州特优观赏山茶光合生理特性研究

本文对引种栽培于贵州省植物园的小黄花茶 (CamellialuteofloraY .K .Li)、美丽红山茶 (C .delicataY .K .Li)、威宁短柱油茶 (C .salenensisStapf.ex .Bean .)、狭叶瘤果茶 (C .neriifoliaChang)和四球茶 (C .tachangensisF .S .Zhang)等贵州特优观赏山茶的光合生理特性进行了研究报道 :(1) ,均为C3植物 ,其CO2补偿点在 6 0 μL/L左右 ,光呼吸速率与总光合的比值为 2 5% ,光补偿点是 80 0～ 2 50 0lx ,光饱和点 16 0 0～4 10 0 0lx ;其中小黄花茶的光补偿点及光饱和点最低 ,威宁短柱油茶的光补偿点及光饱和点最高。 (2 ) ,净光合速率 (Pn) 6 .0 0～ 15.0 0CO2 mg/ (dm2 ·h) ,光呼吸速率 (Pr) 2 .0 0～ 5.0 0CO2 mg/ (dm2 ·h) ,其中威宁短柱油茶的Pn及Pr均较高 ,四球茶的Pn及Pr均较低。暗呼吸速率 (Dr) 0 .70～ 2 .6 0CO2 mg/ (dm2 .h) ,其中威宁短柱油茶的Dr较高 ,小黄花茶的Dr较低。 (3) ,Pn、Pr及Dr相互间呈正相关 ;Chl.(a b) (叶绿素 )含量 7.6 0～ 12 .50mg /dm2 ,其中小黄花茶的含量较高 ,威宁短柱油茶的含量较低。这一结论对研究其观赏植物学特性和扩繁栽培等具有科学价值     

烟道气中O_2,CO及CO_2含量的气相色谱分析方法

报道了使用一台单气路、单检测器 (TCD)气相色谱仪分析烟道气中 O2 ,CO及 CO2 含量的研究结果 .通过对原有气相色谱仪的气路系统进行改造 ,在气路中连接一个普通的六通阀 ,将原来的单色谱柱单气路系统 ,改变为双色谱柱单气路系统 .在分析过程中 ,该方法采用恒定色谱柱温操作 ,通过改变六通阀的位置 ,依次将色谱柱 1 (GDX- 1 0 1 )和色谱柱 2 (TDX- 0 1 )切换到气路系统中 .色谱柱 1用于分析 CO2 的含量 ,色谱柱 2用于分析 O2 及 CO的含量 .被分析样品通过定量管引入色谱柱中进行分离分析 ,分析结果采用外标法进行定量 .该分析方法与原来的奥氏气体分析法相比 ,操作简便 ,分析精度得到了较大的提高 ,同时也缩短了分析时间 ,在生产控制中有很好的实用价值 .     

氧化钛柱层状钽钼酸的制备及表征

以金属氧化物为层间柱子的层柱过渡金属氧化物是一类新型功能材料,其制备及结构研究具有重要意义.以钽钼酸锂为起始层状化合物,钛酸丁酯为钛源,正丙胺为预支撑剂,通过逐步离子交换方式制得钛(IV)多聚阳离子插层的层状钽钼酸盐,经高温焙烧后得到二氧化钛柱层状钽钼酸.采用粉末X射线衍射(XRD)、傅里叶变换红外(FT-IR)和扫描电镜(SEM)等技术对层柱产品及其前驱体的结构和形貌进行表征,并用漫反射紫外-可见(DR UV-Vis)光谱技术测定光吸收性质.结果显示,TiO_2柱层状钽钼酸的层间距为1.12 nm,其层柱结构能耐受673 K的高温.该层柱产品的带隙能为2.41 eV,在可见光区具有一定吸收.     

有机阴离子柱撑水滑石的制备与表征

用离子交换法制备了十二烷基苯磺酸柱撑水滑石(LDH-DB)、十二烷基硫酸柱撑水滑石(LDH-DS)和硬脂酸柱撑水滑石(LDH-St),并通过XRD、FTIR和TGA对改性前后LDH的结构进行了表征.结果表明:当有机阴离子与LDH物质的量比为2、反应温度为70～80,℃、反应时间为2,h、反应pH为4时,有机阴离子可以插入水滑石层间完全取代CO23-,且反应生成的柱撑水滑石具有完整的层状结构.     

细胞膜色谱初步测定2-取代噻唑烷-4-羧酸活性

测定合成的2-取代噻唑烷-4-甲酸的初步生理活性.将由动物心脏制备的心肌细胞膜与硅胶结合制备成心肌细胞膜硅胶混悬液,湿法填充色谱柱(50 mm×2 mm I.D.)得到细胞膜色谱固定相,同时将硅胶填充至同样色谱柱得到阴性对照硅胶固定相.以卡托普利为阳性对照药物,磷酸盐缓冲液(pH 7.4)为流动相,在37℃,流速0.5 mL/min,不同波长下检测.结果显示2-(4-羟基苯基)-噻唑烷-4-甲酸(HT)、2-丙基-噻唑烷-4-甲酸(PT)、2-(4-羟基-3-甲氧基苯基)-噻唑烷-4-甲酸(HMT)及卡托普利在细胞膜色谱柱上均有吸附,而在硅胶柱上无特异性吸附.表明化合物能与细胞膜产生特异性结合,初步判断HT,PT,HMT具有生理活性.细胞膜色谱用于定性测定化合物活性简便、快捷、准确.     

海洋来源普通青霉菌(Penicillium commune 366606)的化学成分研究

研究海洋来源普通青霉菌Penicillium commune 366606的化学成分.人工海水发酵,发酵产物通过乙酸乙酯萃取后得浸膏,运用硅胶柱色谱、凝胶柱色谱(Sephadex LH-20)和反相RP-18柱色谱进行分离纯化.运用现代波谱学方法(NMR、MS)和结合文献数据等对分离所得化合物的结构进行鉴定.从海洋真菌发酵液中分离得到7个化合物,结构分别鉴定为melithasterol B(1)、chrysophanol(2)、2’,3’-dihydrosorbicllin(3)、2-pyruvoybenzamide(4)、2-aceylquinazolin-4(3H)-one(5)、fenestins A(6)、cyclo(D-Pro-D-Leu)(7).所有化合物均为首次从普通青霉菌(Penicillium commune 366606)中分离得到,并报道了化合物4～7对5株癌细胞活性研究.     

色谱法分离卵磷脂

对以硅胶为吸附剂的1. 5 cm×40 cm色谱柱分离卵磷脂的操作条件进行了研究.利用薄层层析法确定了洗脱剂的组成为甲醇/ 氯仿混合液( pH 值3~ 4) .通过洗脱方式及梯度差实验,得出梯度差为V( CH₃OH)∶V( CHCl₃) = ( 1∶2) ~ ( 2∶1)的凹形梯度洗脱为最佳洗脱方式的结论,其洗脱剂用量仅为柱体积的5~ 6倍,洗脱时间为6 h 左右.     

铝锆柱撑蒙脱石处理Cr(Ⅵ)废水的应用研究

比较了膨润土原土及铝锆柱撑蒙脱石处理Cr(Ⅵ )废水的性能 ,探讨了蒙脱石用量、Cr(Ⅵ )废水浓度、pH值等因素对膨润土吸附Cr(Ⅵ )实验的影响 .结果表明 :铝锆柱撑蒙脱石对Cr(Ⅵ )的吸附效果比原土有较大提高 ;Cr(Ⅵ )废水的pH值、膨润土用量对Cr(Ⅵ )吸附效率影响较大 .当pH =2 ,柱撑膨润土用量为 6g·L- 1 ,对浓度为 5 0mg·L- 1 Cr(Ⅵ )吸附率几乎达 10 0 % .铝锆柱撑蒙脱石应用于化工厂的铬渣浸出液中Cr(Ⅵ )的吸附效果显著 .铝锆柱撑蒙脱石对Cr(Ⅵ )的吸附包括表面物理吸附与层间离子化学吸附 .     

多壁碳纳米管用于富集水样中有机磷农药残留的研究

用50mg经过纯化的多壁碳纳米管(PMWCNTs)装填成固相萃取(SPE)柱,采用GC PFPD检测,研究了水样中8种有机磷农药在SPE柱上的泄漏体积(BTVs)和回收率,并将之与OasisHLBSPE柱(1mL)以及实验室自行装填的石墨化碳黑SPE柱(50mgCarbopackB)的性能相比较.结果表明,因其高水溶性,浓度为20μg/L的甲胺磷在上述3种SPE柱上的BTVs均小于10mL;浓度各为1μg/L的敌敌畏、二嗪农、甲基对硫磷、毒死蜱、对硫磷在3种SPE柱上的BTVs均大于200mL;PMWCNTs柱对极性有机磷农药敌百虫和乐果的保留能力高于CarbopackB柱而低于OasisHLB柱.用PMWCNTs柱萃取100mL浓度各为2μg/L的加标水样时,除了甲胺磷和敌敌畏外,6种有机磷农药的回收率均高于70%.分析实际水样时,PMWCNTs柱萃取和三氯甲烷液 液萃取所得的结果一致.PMWCNTs是一种潜在的SPE吸附剂.     

反相高效液相色谱法测定西梭霉素含量

以邻苯二甲醛和巯基乙酸为衍生化试剂 ,用柱前衍生化反相高效液相色谱法分离测定西梭霉素含量 .流动相 :甲醇 -水 (70∶30 ) ,内含醋酸 0 .2 0mol L ,庚烷磺酸钠 13mmol L ,检测波长为 2 5 0nm ,柱温为 2 5℃ ,进样 2 0 μL ,检出限为 2 .13mg L .     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with