药用植物石防风与柴胡不对称体细胞杂交的初步研究

经狭叶柴胡悬浮细胞系分离的原生质体用强度为 2 60 μW /cm2 紫外线照射 0 ,1 ,2 ,3min后 ,与石防风原生质体在PEG诱导下融合 .对融合再生的 56个单细胞克隆进行杂种形态学、染色体、同功酶分析表明 ,其中的 34个为体细胞杂种细胞系 .5个杂种愈伤组织 (不对称融合产物 )在培养 1 2个月时再生出完整小植株 .     

柴胡与高寒藏药-川西獐芽菜科间体细胞杂交

川西獐芽菜原生质体用强度为260μw／cm^2紫外线照射1、2、3min后，与狭叶柴胡原生质体在PEG诱导下融合．对融合再生的46个单细胞克隆进行杂种形态学、染色体、同功酶分析，结果表明，它们中中有32个为体细胞杂种细胞系．11个克隆在3个月时再生出完整小植株．     

胡萝卜与川西獐牙菜不对称体细胞杂交

川西獐牙菜(Swertia musstii Franch)原生质体经260μw／cm^2紫外线照射30s、1min、2min、3rain后，与胡萝卜(Daucus carota L.var.sative DC)原生质体在PEG诱导下融合．融合再生的110个单细胞克隆形态学、染色体、同功酶分析表明，35个含有酯酶及／或过氧化物酶同工酶的双亲特征带，部分杂种产生新带，染色体数目多为16-18，确证它们为体细胞杂种．     

药用植物石防风与柴胡不对称体细胞杂交的初步研究

经狭叶柴胡悬浮细胞系分离的原生质体用强度为２６０μＷ／ｃｍ＾２紫外线照射０，１，２，３ｍｉｎ后，与石防风原生质体在ＰＥＧ诱导下融合，对融合再生的５６个单细胞克隆进行杂种形态学、染色体、同功酶分析表明，其中中的３４个为体细胞杂种细胞系。５个杂种愈伤组织（不对称融合产物）在培养１２个月时再生出完整小植株。     

青苗碱谷与高冰草的体细胞杂交及杂种性质鉴定

将高冰草（Agropyrom elongahan Host Nevski）原生质体用强度为380μW／cm^2的紫外线分别照射0s、30s、1min、2min后作为融合供体;而未经射线处理的青苗碱谷（Setaria italica Beaur）原生质体作为融合受体,利用PEG方法诱导融合．对再生克隆进行形态学和染色体观察,并用同工酶、RAPD、5SrDNA间隔序列和叶绿体微卫星DNA（SSR）进行杂种性质鉴定．结果证明融合产物具有双亲基因组,高频率地形成了体细胞杂种。     

普通小麦与玉米的体细胞杂交再生完整植株

从小麦济南177制备得到两种原生质体，一种来源于具有一定分化能力的愈伤组织但其分裂能力较低；一种来源于生长迅速的悬浮细胞但不能分化，将二种原生质体混合，共同作为受体与经过紫外线（UV）照射的玉米（Zea mays L)原生质体在PEG诱导下融合，培养后获得再生克隆并进一步分化为植株，而它们单独与玉米原生质体融合均不能再生植株，通过染色体、同工酶及5SrDNA分析及生长习性分析证明再生植株均为体细胞杂种。     

碱性脂肪酶产生菌--扩展青霉K40原生质体的制备和再生

采用 0 .6%纤维素酶加 0 .6%蜗牛酶的混合酶由扩展青霉 K4 0中获得大量的原生质体 ,并比较了菌龄、二硫苏糖醇 ( DTT)预处理方式、酶解时间、温度、 p H、培养基成分及稳定剂等因素对原生质体的形成和再生的作用 .选出制备原生质体的最适条件 :0 .6%纤维素酶 +0 .6%蜗牛酶 ,在 0 .6mol/L Na Cl+0 .3 %Ca Cl2 ,DTT预处理 0 .5h,菌龄为 1 9～ 2 0 h,p H 5.4 ,2 8℃酶解 3～ 3 .5h,原生质体产量可达 2 .3 6× 1 0 7个/ml,实现再生 ,再生率达 70 %～ 80 % .并对原生质体的释放和再生方式进行跟踪观察     

蒙古口蘑与双孢蘑菇原生质体融合育种研究

以蒙古口蘑和双孢蘑菇为出发菌株,研究了酶浓度、酶解时间、菌龄和渗透压稳定剂、再生培养基等对蒙古口蘑和双孢蘑菇原生质体制备和再生的影响.结果表明,蒙古口蘑原生质体制备和再生的最佳条件是,培养5 d的菌丝体用2.5%(w/w)的溶壁酶酶解4 h,渗透压稳定剂为0.6 mol/L KCl,MB为再生培养基,制备率为7.53×1010个/L,再生率为8.4×10-4;双孢蘑菇原生质体制备和再生的最佳条件是,培养5 d的菌丝体用2%(w/w)的溶壁酶酶解3 h,渗透压稳定剂为0.6 mol/L KCl,PQA为再生培养基,制备率为6.96×1010个/L,再生率为7.4×10-4.对两种菌原生质体的释放过程进行形态观察,均为顶端释放.采用双亲灭活原生质体融合技术对蒙古口蘑和双孢蘑菇原生质体融合进行研究,蒙古口蘑原生质体采用热灭活,65℃处理30 min,灭活率达100%,双孢蘑菇采用紫外灭活,在15 W紫外灯下,距离30 cm,处理20 min,灭活率达100%,两菌株按1∶1混合,以30%PEMG(6 000)为促融剂,融合10 min,融合率为5.6×10-5.经遗传稳定性检验,融合菌株的遗传稳定率为80%,从菌落特征、菌丝形态、菌丝生长量、酯酶、游离全蛋白、乳酸脱氢酶、乙醇脱氢酶和过氧化物酶等同工酶方面对融合子进行筛选,获得一株具有双亲性状的融合株.     

单倍体小麦与簇毛麦的不对称体细胞杂交

以小麦杂２４－２（Ｔｒｉｔｉｃｕｍ ａｅｓｔｉｖｕｍ,ｃｖ．２４－２）花药来源的愈伤组织分离原生质体作受体;簇毛麦（Ｈａｙｎａｌｄｉａ ｖｉｌｌｏｓａ）幼胚来源的愈伤组织原生质体经２２０μＷ／ｃｍ＾２紫外线照射３０ｓ作供体,作ＰＥＧ法诱导融合,最后获得再生愈伤组织。以融合再生的４个最先长大的细胞系进行染色体,同工酶和ＲＡＰＤ分析。结果表明,这些细胞系均为体细胞杂种,ＲＡＰＤ技术可作为小麦体细胞杂种     

单倍体小麦与簇毛麦的不对称体细胞杂交

以小麦杂２４２（Ｔｒｉｔｉｃｕｍａｅｓｔｉｖｕｍ,ｃｖ．２４２）花药来源的愈伤组织分离原生质体作受体;簇毛麦（Ｈａｙｎａｌｄｉａｖｉｌｏｓａ）幼胚来源的愈伤组织原生质体经２２０μＷ／ｃｍ２紫外线照射３０ｓ作供体,用ＰＥＧ法诱导融合,最后获得再生愈伤组织．对融合再生的４个最先长大的细胞系进行染色体,同工酶和ＲＡＰＤ分析．结果表明,这些细胞系均为体细胞杂种,ＲＡＰＤ技术可作为小麦体细胞杂种早期鉴定的有效方法     

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

A computer generator for randomly layered structures

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

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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.