衣康酸产生菌-土曲霉T-730原生质体的制备和再生

以衣康酸产生菌土曲霉T-730为供试菌株,研究了菌丝体培养方式、酶配比、菌丝的菌龄、酶解温度和时间、再生培养方法等因素对土曲霉原生质体形成和再生的影响．结果表明：采用液体静置培养12h～14h的菌丝体,在含有纤维素酶0．6％,蜗牛酶0．3%,溶菌酶0．1％的混合酶系统中,置35℃酶解3.5h,原生质体形成率最高;采用双层平板培养法于32℃再生,再生率达到70.6%     

稗弯孢菌（Curvularis lunata）原生质体的制备

研究了不同菌龄、酶浓度、渗透压稳定剂、缓冲液pH值以及酶解温度和时间等因素对稗弯孢菌(Curvularia lunata)原生质体形成的影响。将培养18h的菌丝,以0.7mol/L KCl作为渗透压稳定剂,30℃下,经过2％溶壁酶和4％纤维素酶混合酶液(pH5.8)酶解4h,原生质体在静止条件下最大释放量达到 1.7×10~6/mL,再生率为0.76％。     

SD－5菌株原生质体形成与再生条件的研究

探讨了培养基成分、培养时间、高渗缓冲液成分和ｐＨ、溶菌酶浓度以及酶解温度和时间对苏云金杆菌ＳＤ—５菌株原生质体形成和再生的影响；结果表明，ＳＤ—５菌株原生质体形成和再生的最佳条件组合为：ＰＢＧ培养基、３０℃培养１４ｈ再活化５ｈ，以ＳＭＭｐＨ６．５作酶解缓冲液，溶菌酶浓度０．６ｍｇ／ｍｌ，３４℃处理６０ｍｉｎ．     

酵母菌原生质体形成与再生多因子综合效应分析

研究了酶解时间、酶解温度、渗透压稳定剂和预处理剂对酿酒酵母Ａ００１与克鲁维酵母Ｙ０３４原生质体形成时间与再生的综合效应．统计分析表明，在２％蜗牛酶，菌龄为对数生长期时，影响原生质体形成的主要因素是酶解时间、酶解温度，且两者存在交互作用．影响原生质体再生的主要因素是渗透压稳定剂．确立了实验菌株原生质体形成与再生的最佳匹配条件     

米曲霉F16原生质体的制备和再生研究

目的:研究菌龄、酶液组成、酶解时间、酶解温度、渗透压稳定剂、培养基成分等因素对米曲霉F16原生质体制备和再生的影响。结果表明,米曲霉原生质体制备和再生的最佳条件是:菌龄15h,酶液为0.75%纤维素酶、0.75%蜗牛酶、0.5%溶菌酶的混合酶液,酶解时间2.5h,温度为28℃,最适原生质体再生培养基为含有0.6mol/LNaCl的PDA培养基。     

SD—5菌株原生质体形成与再生条件的研究

探讨了培养基成分、培养时间、高渗缓冲液成分和ｐＨ、溶菌酶浓度以及酶解温度和时间对苏云金杆菌ＳＤ－５菌株原生质体形成和再生的影响；结果表明，ＳＤ－５菌株原生质形成和再生的最佳条件组合为：ＰＢＧ培养基、３０℃培养１４ｈ再活化５ｈ，以ＳＭＭｐＨ６．５作酶解缓冲液，溶菌酶浓度０．６ｍｇ／ｍｌ，３４℃处理６０ｍｉｎ。     

酵母菌原生质体形成戌再生多因子综合效应分析

研究了酶解时间、酶解温度、渗透压稳定剂和处理剂对酿酒酵母Ａ００１与克鲁维酵母Ｙ０３４原生质体形成时间与再生的综合效应，统计分析表明，在２％蜗牛酶，菌龄为数生长期时，影响原生质体形成的主要因素是酶解时间、酶解温度，且两者存在交互作用，影响原生质体再生的主要因素是渗透压稳定剂，确立了实验菌株原生质体形成与再生的最佳匹配条件。     

维生素B＿2产生菌的原生质体制备及再生

用１．０％纤维素酶＋０．５％蜗牛酶的混合酶液酶解培养２６～３２小时的维生素Ｂ＿２产生菌阿氏假囊酵母（Ｅｒｅｍｏｔｈｅｃｉｕｍａｏｈｂｙｉｉ）菌丝体，可以得到大量原生质体，最佳酶解时间为１．５小时。原生质体再生率为０．３５％～０．６７％。阿氏假囊酵母在原生质体再生过程中具有较高的突变率，以维生素Ｂ＿２产量为指标的正突变率为１２．１４％。     

黄伞原生质体制备与再生条件研究

探讨了渗稳剂种类、酶种类和浓度、酶解时间、酶解温度、菌龄等因素对黄伞原生质体制备和再生的影响．结果表明,其原生质体制备和再生的最佳条件是菌龄为7d,2％溶壁酶处理2．5h,酶解温度25℃,0．6mol／L KCl为制备时的渗稳剂及0．6mol／L甘露醇为再生时的渗稳剂,其原生质体的产率为2．16×10^7个／mL,再生率为0．52％．     

紫贻贝酶解多肽体外抗肿瘤活性研究

确定了紫贻贝胰蛋白酶水解时的最佳条件,研究了紫贻贝酶解多肽的体外抗肿瘤活性.采用正交实验方法, 以料液比、pH、加酶量、酶解温度和酶解时间为因素,以酶解液的氨基氮含量和肿瘤细胞增殖抑制率为指标进行L16(45)正 交实验,MTT法检测酶解多肽对DU-145、PC-3、H1299和MGCS0-3等肿瘤细胞的抑制活性;HE染色法观察酶解多肽对 肿瘤细胞形态的影响;免疫组化法检测酶解多肽对细胞中Bel-2表达的影响.结果表明:当料液比为1:4、pH为8.5、加酶 量为1 000 U/g、温度为45℃、酶解时间为5h时酶解多肽的水解度最大;当料液比为1:4、pH为8.0、加酶量为1 500 U/g、温 度为40℃、酶解时间为2h时酶解多肽的抗肿瘤活性最强,该肽可以下调肿瘤细胞中Bc1-2的表达.紫贻贝酶解多肽具有 抗肿瘤活性,可能是通过诱导细胞凋亡来实现的.     

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.     

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.     

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.     

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.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.