广西莪术和蓬莪术的离体快繁技术研究

本试验以广西莪术和蓬莪术的幼芽、嫩叶、块茎和根为外植体,接种在以MS为基本培养基、外加不同激素浓度组合的培养基上进行愈伤组织诱导、幼芽增殖、生根等培养.实验表明:诱导莪术叶、块茎和根的愈伤组织形成的最适培养基为MS+2,4-D 1.0×10-3 g/L+6BA 0.5~1.0 mg/L(+NAA 0.3 mg/L),其中莪术叶诱导率最高达96%;幼芽最适增殖培养基为MS+6-BA 3. mg/L+NAA 0.1 mg/L+KT 1.0 mg/L,其增殖倍数达3.5以上;而生根培养基以1/2MS+NAA 1.0 mg/L+BA .5 mg/L为最佳,生根率达100%,其移栽成活率达85%以上.     

白芨高效再生体系建立及工厂化育苗技术研究

以白芨种子为外植体,1/2MS或MS为基本培养基,通过添加不同浓度配比的植物生长调节剂,筛选最适合原球茎的诱导、芽的增殖与分化以及生根培养的条件。最适宜白芨原球茎诱导的培养基为1/2MS+1.5 mg/L 6-BA+1.0 mg/L NAA;原球茎的芽增殖的最适培养基为MS+0.5 mg/L 6-BA+0.1 mg/L NAA,增殖倍数达6.6;最佳分化培养基为MS+0.5 mg/L 6-BA+0.3 mg/L NAA+50.0 g/L土豆泥;最佳生根培养基为1/2 MS+0.5 mg/L NAA+70.0 g/L香蕉泥,生根率达100%;炼苗基质配方以黄土∶腐植土∶锯木粉按体积比4∶4∶2,白芨苗移栽成活率高。以白芨种子诱导原球茎获得的高效再生技术体系可以在白芨产业化发展中推广应用。     

马占相思和大叶相思优树组培不定根诱导研究

以10年生马占相思和大叶相思优良单株为研究对象,其茎段外植体通过初代培养和增殖培养后获得增殖芽,研究了生长素种类及浓度、基本培养基类型、蔗糖浓度和活性炭浓度对增殖芽生根的影响,分析了不同类型增殖培养基多次继代诱导的增殖芽对生根的影响。结果表明:马占相思的最佳生根培养基为1/2MS+0.5 mg/L IBA+0.5 mg/L NAA+3%蔗糖,大叶相思最佳生根培养基为1/2MS+0.5 mg/L IBA+0.25 mg/L NAA+3%蔗糖,二者的生根率均能达到93%以上。以马占相思和大叶相思增殖芽为生根材料,含低浓度细胞分裂素且添加活性炭的增殖培养基诱导时,两种相思的生根率均能达到90%以上,生根率随着继代次数的增加保持稳定,生根苗生长健壮。     

中间锦鸡儿组织培养体系的建立

以中间锦鸡儿茎段为外植体,建立了它的组织培养体系,具体条件如下:愈伤组织诱导培养基为MS+GA30.15mg/L+6-BA 0.2mg/L+NAA 0.4mg/L+AC 0.1g/L+蔗糖25g/L+琼脂6g/L,愈伤诱导率达33.33%;丛生芽诱导培养基为MS+6-BA 1.0mg/L+NAA 0.2mg/L+蔗糖25g/L+琼脂6g/L,诱导率为13.33%;诱导生根培养基为MS+IAA 0.5mg/L+GA30.15mg/L+蔗糖20g/L+琼脂6g/L,生根率达60%;将生根幼苗移至蛭石和营养土体积比为2∶1的基质中,移栽成活率高达100%.     

中华芦荟成熟叶组织培养的研究

以中华芦荟成熟叶为外植体,接种于9组不同2,4-二氯苯氧乙酸(2,4-D)和6-苄基腺嘌呤(6-BA)浓度配比的脱分化培养基中,诱导外植体的脱分化形成愈伤组织。研究表明,中华芦荟叶愈伤组织的最佳培养基为MS+0.5mg/L(2,4-D)+3mg/L(6-BA)+30g/L蔗糖+10g/L琼脂+1.0g/L活性炭;诱导不定芽的适宜培养基为MS+1mg/L(2,4-D)+3mg/L(6-BA)+30g/L蔗糖+10g/L琼脂+0.7g/L活性炭;及诱导生根的适宜培养基为1/2MS+0.2mg/Lα-萘乙酸(NAA)+20g/L蔗糖+10g/L琼脂+0.5g/L活性炭,生根率达100%.     

百脉根植株高频再生体系的建立

以百脉根的下胚轴为外植体材料,探究不同激素种类和不同浓度对百脉根愈伤组织的诱导、分化增殖及生根的影响.结果表明:诱导愈伤组织的最佳培养基为:MS+2,4—D 2.0 mg/L+KT 2.0 mg/L+3%蔗糖+0.7%琼脂;诱导愈伤组织分化最佳培养基为:MS+6-BA 1.0 mg/L+NAA 0.5 mg/L+3%蔗糖+0.7%琼脂;诱导不定芽生根的最佳生根培养基为:MS+NAA 0.01 mg/L+2%蔗糖+0.7%琼脂,生根率达100%;实验建立了一个高频的百脉根再生体系,为百脉根基因工程操作奠定了基础.     

野生通江百合高频率再生植株的研究

本文报道了用野生通江百合的种子萌发的无菌苗,切取叶片、叶柄、茎段基部小鳞茎为外植体进行组织培养研究.结果表明:种子在预处理去翅后,经75%(v/v)酒精浸泡杀菌30s,0.1%(v/v)氯化汞消毒5min,灭菌效果最好;愈伤组织诱导的最适培养基为MS+6-BA1.0mg/L+NAA 1.0mg/L+蔗糖30g/L;培养基MS+6-BA2.5mg/L+NAA 0.1mg/L+蔗糖30g/L诱导不定芽及增殖效果最好,平均繁殖倍数9.38,增殖率100.0%;培养基MS+IBA1.00mg/L+蔗糖30g/L最适合用于诱导通江百合不定芽生根,生根率可达93.3%;炼苗后移栽成活率95%以上.     

珍奇园艺植物珠帘藤的组织培养

以珠帘藤带芽节段和叶片为外植体进行组织培养.结果表明,以节段外植体诱导丛芽的适宜培养基为MS+2 mg/L BA,以叶片外植体诱导不定芽的适宜培养基为MS+1 mg/L BA+0.1 mg/L NAA;茎段外植体成芽时间较短,数量较多;最佳不定芽增殖培养基为MS+1.5 mg/L KT,繁殖系数达5.5,苗壮、长势好;最佳不定芽生根培养基为1/2 MS+0.1 mg/L iBA+0.6 g/L AC,生根率达96%.平均生根7.5条,根粗壮;最适试管苗移栽基质为腐质土+珍珠岩+椰糠(1:1:1),移栽成活率达92%.     

八宝景天茎段的组织培养和快速繁殖①

以八宝景天茎段为外植体,以MS为基本培养基,对八宝景天外植体消毒、不定芽诱导、继代增殖和生根培养基进行筛选试验,建立了八宝景天组织培养快繁技术体系。结果表明:75%C_2H_5OH 30s+0.1%HgCl_2 6min为八宝景天茎段消毒的最佳方法;MS+6-BA 2.0mg/L+NAA 0.1 mg/L为不定芽诱导的最佳培养基;MS+6-BA 3.0mg/L+NAA 0.1mg/L为继代增殖培养的最佳培养基;不定芽诱导生根的最佳培养基为1/2MS+NAA 0.1 mg/L或1/2MS+IBA 0.1 mg/L,生根率达100%。     

钻天柳无芽嫩茎离体快速繁殖的研究

为保护钻天柳这一濒危物种,以无芽嫩茎为材料,进行了愈伤组织诱导和分化,不定芽生根,试管苗的继代培养、移栽、扦插和移植的研究,建立起钻天柳离体繁殖技术.结果证明:MS+BA0.5 mg/L(以下单位相同者略)+2,4-D0.5+NAA1.0+蔗糖30 g/L为无芽嫩茎愈伤组织的诱导的适宜培养基;MS+BA1.0+NAA0.8+蔗糖30 g/L为颗粒状愈伤组织继代培养的适宜培养基;MS+AgNO31.0+BA 0.6+NAA 0.1+蔗糖30 g/L是愈伤组织分化培养和不定芽继代分化培养的适宜培养基;1/2MS+IAA 0.5+NAA 0.1+蔗糖20 g/L是生根及生根继代培养的理想培养基;移植到河岸上的试管苗生长旺盛,生物性状保持不变.     

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