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1.
氯化铜对滇紫草细胞色素形成的影响   总被引:7,自引:0,他引:7  
滇紫草细胞于M-9培养液中悬浮培养以形成紫草色素。当M-9培养液中CuSO4·5H20由相同浓度的CuCl2·2H2O取代后,色素产量比对照提高了58.7%,CuCl2·2H2O的最适浓度为30μmol/L。滇紫草细胞的继代培养基B—5中的CuSO4·5H2O取代后,培养所得的细胞接种于M-9培养液中,色素产量比对照提高了32.08%,CuCl2·2H2O的最适浓度为0.6μmol/L.CuCl2·2H2O对细胞生长无不良影响。M—9培养液中,铜于色素形成的初期,可快速吸附于细胞上,这一现象为CuCl2·2H2O促进紫草色素合成机制的深入研究提供参考。  相似文献   

2.
利用循环伏安法和阶跃电位法研究铜微电极在HCl和H2SO4溶液中的点腐蚀行为结果表明,Cu在HCl和H2SO4溶液中腐蚀机理不同。Cl^-对Cu氧化膜具有破坏作用。Cu在0.1mol/L H2SO4溶液中的I-t曲线的初始部分呈性关系,为动力学控制。  相似文献   

3.
用UV、IR研究了酸度对水杨醛缩异烟肼酮式烯醇式互变及其配位性能的影响.研究表明:固态物以酮式为主要存在形式且存在分子内氢键,溶解后,酮式与烯醇式的比例依溶液酸度而异,当HCl浓度>7116×10-3mol/L时,以共轭体系较小的酮式存在,当NaOH浓度>414×10-3mol/L时则以共轭体系较大的烯醇式存在.通过对其Cu(Ⅱ)配合物的合成与表征,证明当HCl浓度<005mol/L时可合成1∶1型配合物,仅当HCl浓度≥005mol/L时,才可获得1∶2型配合物  相似文献   

4.
分别利用K3Fe(CN)6,CuCl2·2H2O-DMSO,Cu(NO3)2·3H2O-CH3CN,CuCl2·2H2O-DMF,CuCl2·2H2O-NaOCH3,等5种不同催化体系制备了阻燃剂聚二溴苯醚,并详细地研究了其中3种催化体系中的单体浓度、催化剂用量、反应温度以及反应时间对产率的影响,找到了合成的最佳条件,并讨论了几种催化体系的反应机理。5种催化体系所得产物存在着分子量由大到小的分布,  相似文献   

5.
尿素-金属氯化物熔体的电导特性   总被引:3,自引:0,他引:3  
测定了尿素—LiCl、尿素—NaCl、尿素—kCl、尿素—CuCl_2、尿素—NiCl_2、尿素—NaCl—CuCl_2、尿素—NaCl—NiCl_2熔体的电导率,研究了温度、浓度、碱金属离子大小对电导的影响。在所研究的温度范围内(100~136℃),上述体系的电导率与温度成直线关系,尿素一碱金属氯化物熔体的电导率随阳离子半径增大而减少,且与阳离子半径平方的倒数成线性关系。尿素—CuCl_2(0.1~1.0mol·dm ̄(-3))的电导率在0.8mol·dm ̄(-3)附近出现最高点,在0.74mol·dm ̄(-3)氯化物浓度附近,摩尔电导的顺序是LiCl>NaCl>KCl>。  相似文献   

6.
用循环伏安法描述了三元络合物Cu2(EGTB)(bpy)Cl4·8H2O(以下以Cu2(Ⅱ)L代)与二氧的反应.在含0.1mol·dm-3四丁基高氯酸铵的DMF溶液中加入Cu2L,使得O2/O2-的可逆伏安图发生变化对。O2的Ip.c增大,并在比O2还原电势更正的地方产生一新峰.当[Cu2L]大约为2.4mmol·dm-3时,仅存在唯—一个峰且基本不变.结果表明Cu2L能与O2-反应产生O2,有良好的超氧化物歧化酶性质.  相似文献   

7.
铜—肌苷的极谱测定   总被引:1,自引:0,他引:1  
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。  相似文献   

8.
通过室温下甘氨酸与Cu(OH)2的固相配位反应,合成配合物cis-Cu(Gly)2.H2O,采用自行研制的、具有恒定温度环境的反应热量计,以溶解量热法测定甘氨酸、Cu(OH)2、配合物溶于2.0mol.L^-1的HCl溶液中的溶解焓,通过所设计的热化学循环,应用Hess定律,得到甘氨酸与Cu(OH)2固相配位反应的反应焓△rH^φm为-24.370kJ.mol^-1,计算出配合物的标准生成焓△fH  相似文献   

9.
CO2加H2合成甲醇反应中CuO/ZnAl2O4催化剂性能的研究   总被引:4,自引:0,他引:4  
研究了制备条件对CO2加H2合成CH3OH反应中CuO/ZnAl2O4催化剂的性能及ZnAl2O4尖晶石形成的影响。采用XRD、BET、TPD和FT-IR等测试技术,对催化剂晶相结构和表面物种进行了深入分析。结果表明,沉淀方法对催化活性具有重要影响;NaCO3沉淀剂最有利于ZnAl2O4尖晶石的形成;Zn/Al摩尔配比为0.23/0.38时,尖晶石形成最为完整,活性最好。经TPD和FT-IR测试,  相似文献   

10.
通过测定碳钢在含有不同浓度鸡蛋水解产物的2mol/L盐酸、2mol/L硫酸、2mol/L碳酸铵溶液中的阳极极化曲线,研究了碳钢在不同介质中的阳极过程,发现鸡蛋水解产物对在酸性、碱性溶液中的碳钢皆有明显的缓蚀作用.在HCl溶液及(NH4)2CO3溶液中,鸡蛋水解产物的最佳浓度为2.0%,在H2SO4溶液中,鸡蛋水解产物的最佳浓度为1.0%,并对鸡蛋水解产物的缓蚀性能进行了理论探讨  相似文献   

11.
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.  相似文献   

12.
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.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
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.  相似文献   

14.
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.  相似文献   

15.
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.  相似文献   

16.
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.  相似文献   

17.
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。  相似文献   

18.
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.  相似文献   

19.
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.  相似文献   

20.
赵英华 《科技信息》2008,(12):219-220
0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation's behavior in their social life throughout the long history is beyond list.  相似文献   

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