丁草胺原药中杂质的气相色谱分析

通过优化气相色谱检测条件,建立了可定量检测丁草胺原药中主要杂质的气相色谱分析方法,原药中杂质1为1—甲基—3—乙基苯胺,外标曲线回归方程为y=1379.78x-8222.9,线性相关系数为0.9993,质量浓度为5.99mg/mL,质量分数为5.99％;杂质2为2—氯—N—(2,6-二乙基苯基)乙酰胺,外标曲线回归方程为y=671.58x-3989.4,线性相关系数为0.9992,质量浓度为5.97mg/mL,质量分数为5.97％.日内和日间检测结果的相对标准偏差(RSD)均小于2％.     

南瓜黄色素的稳定性研究

研究探讨pH、温度、光照、金属离子这几个可能对色素有影响的因素,分析它们对南瓜黄色素稳定性的影响。结果显示,南瓜黄色素的最大吸收波长为446 nm。当pH<4、pH>13时不稳定,pH在4¹2较稳定;当温度高于80℃时不稳定;正常,黑暗,光照3种条件对色素稳定性影响不大;Fe2+对色素有明显的增色效应,其他金属离子对色素稳定性影响不大。     

催化动力学光度法测定冷蒿中槲皮素

基于稀H2SO4介质中,槲皮素对KBrO3氧化甲基橙褪色反应的明显催化作用,建立了测定槲皮素的动力学光度法.当甲基红、硫酸、KBrO3的用量分别为1.00mL、0.30mL、0.25mL,反应温度70℃,反应时间5min时,测定槲皮素的线性范围为0.00～0.05 mg/L,检出限为0.002mg/L.利用此法测定了冷蒿中槲皮素含量,平均含量为0.2439×10-4 mg/g(n=4),加标回收率介于91.8%～96.9%,结果满意.     

MB(A2/O)反应器处理城市污水

研制了将MBR和A2/O工艺相结合的新型MB(A2/O)反应器,研究了MB(A2/O)反应器对城市污水的处理效果,并分析了其性能和机理.结果表明:出水COD小于20mg/L,平均去除率达93.80%;NH3-N质量浓度小于8mg/L,去除率可达88.42%;TN质量浓度小于30mg/L,去除率达46.05%;TP质量浓度小于0.3mg/L,去除率达94.70%.试验表明,MB(A2/O)反应器在保留对其他污染物良好去除效果的同时,对TP有极高的去除率,处理后水质满足<城市污水再生利用城市杂用水水质>(GB/T 18920-2002)的要求.     

毛细管电泳快速分析鼠药氟乙酸钠

建立了毛细管电泳高频电导法检测鼠药氟乙酸钠的分析方法.优化了电泳分离检测条件,以2.5 mmol/L Na2B4O7 0.5 mmol/L HAc 0.1 mmol/L CTAB (φ)=5%乙醇溶液体系为分离介质,在反向电泳分离电压-16 kV时,氟乙酸钠峰形良好.该法在5～250 μg/mL范围内,线性相关系数 r 为0.998,检出限为3 μg/mL(S/N=3).不同添加浓度水平的谷粒样本,日间和日内RSD均小于5%,回收率均在95%以上,方法高效、快速、灵敏,适于法医和临床中毒急救中的鼠药的快速分析.     

液相色谱/质谱法检测血液中林可霉素

采用液液萃取法提取血液中林可霉素,液相色谱/大气压化学电离/离子阱质谱技术(HPLC/APCI/MS/MS)进行检测.该法在0.02～3.0 μg/mL范围内,线性相关系数0.999 3,检测限为5 ng/mL(S/N=3),定量检出限为20 ng/mL(S/N=10).各添加水平样品回收率均在95%以上,日间和日内RSD均小于5%,适于样本分析的需要.     

不同浓度血红蛋白对小鼠骨髓瘤细胞体外培养的影响

用含不同浓度的牛源性血红蛋白细胞培养液培养小鼠骨髓瘤细胞,通过细胞计数绘制生长曲线,计算最大增殖浓度和倍增时间,并进行比较分析.结果表明:当培养液的血红蛋白浓度在1~5 mg/dL时小鼠骨髓瘤细胞生长较好,细胞最大增殖浓度在1.2×106个/mL以上,倍增时间小于20 h,当培养液的血红蛋白浓度为6 mg/dL时细胞生长抑制,细胞最大增殖浓度和倍增时间为6.7×105个/mL和21.6 h.由此可见,培养液中血红蛋白浓度≤5 mg/dL时不影响细胞生长,达到6 mg/dL时抑制细胞生长.     

催化动力学光度法测定漏芦花中槲皮素

基于稀H2SO4介质中,槲皮素对KBrO3氧化甲基橙褪色反应的明显催化作用,建立了测定槲皮素含量的动力学光度法.采用回流法提取漏芦花中槲皮素,用催化动力学光度法测定其含量,检测波长为517nm,当甲基红、硫酸、KBrO3的用量分别为1.00 mL、0.30mL、0.25 mL,反应温度80 ℃,反应时间5 min时,该法测定槲皮素的线性范围为0.00～0.05 mg/L,检出限为0.002mg/L.样品中槲皮素平均含量为0.269×10-3mg/g(n=5),平均回收率介于92.48%～95.10%.     

气相色谱法测定莪术挥发油中榄香烯含量

以SE-30毛细管色谱柱为分析柱,正十六烷为内标物质,采用程序升温气相色谱法测定莪术挥发油中榄香烯的含量。在榄香烯质量浓度为0.50~3.00 mg/mL范围内呈线性关系,线性方程为Y=0.899 6C-0.000 7(r=0.998 8),加样回收率为104.3%,日内及日间精密度RSD≤5.00%(n=5)。     

南瓜粉对其营养强化挂面品质的影响

用南瓜粉取代部分小麦粉，提高挂面中膳食纤维、β-胡萝卜素等营养组分的含量并评价南瓜粉挂面的蒸煮特性、质构、色度以及感官品质. 随着南瓜粉取代量的增加，挂面的最佳蒸煮时间、干物质损失率与面汤浊度都随之增加，干物质吸水率降低，蒸煮后的挂面硬度增加、黏度和拉伸力降低；亮度逐渐降低，黄蓝值变化显著- R 2=0 97- , 红绿值肉眼并不能明显觉察到；当南瓜粉取代量为4%时，挂面的色泽、适口性、食味接受度较好，面汤较澄清，呈现淡淡的南瓜味，南瓜粉挂面 ω -膳食纤维-比纯小麦粉加工产品提高约0 8%, β-胡萝卜素达到0 321 mg/100 g.     

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.     

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.     

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。     

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.