生物碱—半导体场效应传感器的研制及应用

研制了生物碱（秋水仙碱或毛果芸香碱）－半导体场效应传感器，并测得了器件的浓度线性范围：２．５０×１０＾－＾５－４．００×１０＾－＾３ｍｏｌ／Ｌ（秋水仙碱）；９．９０×１０＾－＾５－５．０５×１０＾－＾３ｍｏｌ／Ｌ（毛果芸香碱）。该传感器可应用于药物制章占秋水仙碱的测定，方法简便，效果良好。     

黄嘌呤氧化酶微型生物传感器及其应用的研究

该文利用Ｎａｆｉｏｎ和电化学聚合苯酚（ＰＰｈ）复合膜将黄嘌呤氧化酶（ＸＯＤ）成功地固定在碳纤维微电极上，制成黄嘌呤氧化酶微型传感器。在５．０×１０－５～１．８×１０－３ｍｏｌ／Ｌ范围内次黄嘌呤浓度与传感器的电流响应呈线性关系，相关系数为０．９９９０。该传感器具有灵敏度高，抗干扰能力强，使用寿命长等特点。传感器用于心肌细胞缺血性损伤过程中胞外次黄嘌呤的测定，结果满意。     

磺胺嘧啶的极谱伏安行为研究

通过对磺胺嘧啶在多种底液中的极谱伏安行为研究，发现磺胺嘧定在ＢＲ缓冲溶液（ｐＨ４．２）和ＨＡｃ－ＮａＡｃ缓冲液（ｐＨ４．３２）中产生良好的还原峰，峰电位分别为－０．７６Ｖ和－０．７９Ｖ（ｖｓ．ＳＣＥ），在这两种底液中，峰电流或其导数峰高与磺胺嘧啶浓度在５×１０＾－７～４×１０＾－４ｍｏｌ／Ｌ和５×１０＾－６～３×１０＾－４ｍｏｌ／Ｌ范围内呈良好的线性关系，检测限为８×１０＾－７ｍｏｌ／Ｌ，可望用于     

影响大白菜离体培养再生频率各因素的探讨

本实验以大白菜“０２号杂交早皇白”无菌苗的子叶作为材料,就组织培养过程中影响芽再分化的各种因素进行了初步探讨．用附加ＢＡ４．４×１０－６～３５．５×１０－６ｍｏｌ／Ｌ、ＮＡＡ０．５４×１０－６～３．２×１０－６ｍｏｌ／Ｌ、ＡｇＮＯ３１．２×１０－５ｍｏｌ／Ｌ的ＭＳ培养基培养子叶切段,能直接－诱导分化出芽和根;３～１１ｄ苗龄的子叶芽分化率稳定在８０％以上,其中４～５ｄ苗龄的效果较好;子叶比下胚轴易产生愈伤组织和再生芽;整片子叶比子叶切段易诱导分化出芽．芽分化率最高可达９７．８％．但每个外植体平均芽数以切去子叶柄的子叶切段为多．激素配比以ＢＡ８．９×１０－６ｍｏｌ／Ｌ、 ＮＡＡ２．７×１０－６ｍｏｌ／Ｌ为最好,在此培养基中再添加８．４×１０－５ｍｏｌ／ＬＣｏ（ＮＯ３）２对促进芽分化有一定作用,但效果不如ＡｇＮＯ３。     

双酶电极测定血清中的葡萄糖的研究

本文将葡萄糖氧化酶和过氧化物酶固定在玻碳电极上，制成双酶生物传感器。用该生物传感器测定人体血清中的葡萄糖，尿酸、抗坏血酸、半胱氨酸和色氨酸等对测定无干扰。线性范围在５．０×１０－４～３．５×１０－６ｍｏｌ／Ｌ之间，检测限为５．０×１０－７ｍｏｌ／Ｌ，响应时间为２０ｓ。该生物传感器具有选择性和重现性好，灵敏度高，响应时间短等优点。     

铜—肌苷的极谱测定

在０．０２５ｍｏｌ／Ｌ Ｈ３ＢＯ３－ＮａＯＨ和０．１ｍｏｌ／Ｌ ＫＣＬ支持电解质中（ｐＨ６．５），Ｃｕ（Ⅱ）－肌苷的络合物在－０．５２Ｖ产生灵敏的极谱波，据此建立了测定肌苷的新方法，该波波高与肌苷浓度在８．０×１０＾－７～２．０×１０＾－５ｍｏｌ／Ｌ范围内成线性关系，此法已成功地用于药物中肌苷的测定，对极谱波的性质和机理进行了讨论。     

石英谐振式NH_3敏元件

以在ＡＴ切型，Ａｕ做电极的石英振子上涂覆适当厚度的Ｌ（＋）抗坏血酸为敏感膜，制作气敏元件．实验表明，该元件对微量ＮＨ３（＜３．３×１０－６ｍｏｌ／Ｌ）具有很高的频率响应和灵敏度；对８．２×１０－５ｍｏｌ／Ｌ的Ｈ２，ＣＯ，ＣＨ４，Ｃ４Ｈ１０及８．２×１０－７ｍｏｌ／ＬＨ２Ｓ感度很低，有良好的选择性．     

吸附溶出伏安法测定水中痕量钴

介绍测定痕量钴的一种方法。在０．０１ｍｏｌ／Ｌ ＮＨ３·Ｈ２Ｏ－ＮＨ４Ｃｌ和１．０×１０＾－６ｍｏｌ／Ｌ酸性铬兰Ｋ（ＡＣＢＫ）溶液中，Ｃｏ（Ⅱ）产生很灵敏的还原波，其峰电位是－０．５２Ｖ（ｖｓ、ＳＣＥ）．Ｃｏ（Ⅱ）的浓度在２．０×１０＾－８￣５．０×１０＾－７ｍｏｌ／Ｌ的范围内与峰电流成直线关系，检测限是５．０×１０＾－９ｍｏｌ／Ｌ。这一方法用于测定水中痕量钴，结果令人满意。     

利用选择性重原子增强的固体表面发光技术同时测定痕？…

利用ＳｒＣｌ２和Ｐｂ（Ａｃ）２作为选择性重原子微扰剂，分别诱导出吡哌酸的固体表面延迟荧光和氟哌酸的室温磷光，不经分离直接测定混合样品中的两种药物获得成功。在ｐＨ约１１的条件下测定吡哌酸的线性范围为５×１０＾－７ｍｏｌ／Ｌ￣３×１０＾－３ｍｏｌ／Ｌ，测定氟哌酸的线性范围为３×１０＾－５ｍｏｌ／Ｌ￣３×１０＾－３ｍｏｌ／Ｌ。     

铟-桑色素体系吸附溶出伏安法研究

对Ｉｎ（Ⅲ）－桑色素（ｍｏｒｉｎ）配合物在悬汞电极上的吸附伏安特性作了研究,确定了电极过程。在ＣｌＣＨ２ＣＯＯＨ底液中,有桑色素存在下,用１．５次微分吸附伏安法测定铟,线性范围和检测下限分别为３．５×１０－１０～１．５×１０－７ｍｏｌ／Ｌ和５×１０－１１ｍｏｌ／Ｌ。用此法测定了氢氧化铝、银粉和铅粉样品中的痕量铟,结果满意。     

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.     

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。     

A computer generator for randomly layered structures

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

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.     

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.