在线流动注射离子交换预富集原子吸收光谱法测定痕量铜

本文采用双柱同时进行在线流动注射离子交换预富集测定痕量铜。在采样频率为120个样次/小时的速度下,富集倍数为18倍,检出限为0.2μg/l(3δ),对等30μg/l铜标准液相对标准验差为1.9％、2.0％。     

黄原酯棉富集-GFAAS法测定痕量铟的研究

研究了黄原酯棉(CCX)富集痕量In(Ⅲ)的条件,并用GFAA S测定.结果表明,在pH=5.0时,黄原酯棉能定量富集痕量In(Ⅲ).其饱和吸附量为433μg/g.吸附的In(Ⅲ)可被10 mL 0.05 m o l/L的HNO3定量洗脱,本法用于水样、人工合成铝基和铅基样品中痕量In(Ⅲ)的富集和测定,回收率为97.4%~103.6%.     

用南方离子型稀土矿制取混合稀土氯化物

本文研究了以液—液萃取法从离子吸附型稀土矿的(NH_4)_2SO_4浸出液中提取稀土的工艺条件,试验结果表明,对含RE_2O_33g/l的稀土浸出液,以P_(204)(二2-乙基已基磷酸)为萃取剂,以5N盐酸为反萃液最终的富集液可达到130g/l左右,此液经过浓缩蒸发可得到固体氯化稀土结晶。     

石油烃在海洋微表层中的富集作用

按IOC法对厦门港海区微表层的石油烃进行一年四季的研究,表层海水石油烃含量0.32～0.80μg/l(艹屈)当量,微表层石油烃含量0.76～12.3μg /l(艹屈)当量,富集系数(EF)2.0～26,春季和夏季较大,秋季和冬季较小,污染海区的EF值较大,EF值与水温、盐度以及微表层的DOC含量之间均不存在显著的相关关系。     

对叔丁基杯[4]芳烃对Cr(Ⅲ)和Cr(Ⅵ)的分离富集

进行了对叔丁基杯[4]芳烃对Cr(Ⅲ)和Cr(Ⅵ)化合物分离富集的实验研究。结果表明:在pH=6,1 mol/L的HC l溶液作为洗脱液时,对叔丁基杯[4]芳烃富集柱对Cr(Ⅲ)具有良好的选择富集效果,且水中常见的阳离子对其分离富集干扰不大,对叔丁基杯[4]芳烃对Cr(Ⅲ)的最大吸附量为3.3×103μg/g。该方法用于环境水样中Cr(Ⅲ)的分析,其回收率达到90%以上,获得了满意的结果。研究结果同时表明对叔丁基杯[4]芳烃对Cr(Ⅵ)无富集作用。     

钱塘江流域(杭州段)水环境中多氯联苯的生物富集效应

因为具有不易降解、易生物蓄积、会对生物及人体产生毒害效应等特征,近年来,多氯联苯(PCBs)在生物体内的富集及其生态风险已引起人们的广泛关注.本文利用GC/MS检测钱塘江流域(杭州段)沉积物、底栖生物及鱼体中PCBs的浓度含量(干重)及分布特征,进一步运用生物富集系数评价了钱塘江流域(杭州段)PCBs的富集状况.结果表明,沉积物中PCBs含量为6.93~10.14ng/g,平均含量为8.85ng/g;底栖生物(螺丝)中PCBs含量为14.83~20.43ng/g,平均含量为15.95ng/g;鲫鱼体内中PCBs含量为19.66~25.93ng/g,平均含量为21.62ng/g;鲢鱼体内PCBs含量为19.25~21.34ng/g,平均含量为20.27ng/g.富集系数进一步表明,钱塘江流域(杭州段)生物对PCBs有较强的生物富集性,有一定潜在的环境风险.     

铝合金电极缓蚀剂的研究

在MgCl_2电解液体系中加入20余种添加剂,用静态失重法和极化曲线法测得对铝合金电极（No.2） 的缓蚀效率和腐蚀电流,筛选出两类缓蚀剂的较佳配方,即无机缓蚀剂的配方:A1.2g/l+B1.2g/l+C1.2g/l;有机缓蚀剂的配方:D1.2g/l+E1.2g/l+F 0.8g/l+G0.4g/l.并对缓蚀剂的缓蚀机理进行初步探讨。     

用载有4-(2-吡啶偶氮)-间苯二酚的硅胶富集和分离痕量钢(Ⅱ)和镍(Ⅱ)

用载有4-(2-吡啶偶氦)-间苯二酚(PAR)的硅胶可以富集水溶液中ppb级的铜(Ⅱ)和镍(Ⅱ),用分光光度法测量。在分批平衡法中,铜在pH1.5-5.5范围振荡60分钟以上可被 PAR-SG完全吸附,而镍则在pH 5.5—8范围振荡90分钟以上才完全被吸附。由PAR-SG上的PAR引起的对铜(Ⅱ)、镍(Ⅱ)的净吸附分别为15μmol/gPAR-SG和8.5μmol/g PAR-SG。用含有0.005mol/l HCl的0.25mol/l硫脲可从PAR-SG柱上完全洗脱铜(Ⅱ),而镍需用0.05mol/l的HCl洗脱,这样铜、镍可从它们的混合溶液中互相分离开来。富集倍数可达200以上,铜、镍的回收率均大于95％。     

VTA微量注射溴隐亭诱发大鼠睡眠—觉醒的改变

实验在15只清醒的SD雄性大鼠上完成。利用多巴胺受体激动剂——溴隐亭进行双侧中脑腹侧被盖区(VTA)微量注射,实验观察了四种不同的剂量(5μg/0.5μl、2.5μg/0.5μl、1μg/0.5μl、0.5μg/0.5μl)。结果表明:(一)5μg/0.5μl、2.5μg/0.5μl的溴隐亭注射后,第2～3h的觉醒(W)时间分别增加9.7min(P<0.05)及15.5min(P<0.05),慢波睡眠(SWS)时间分别减少13.3min(p<0.05)及15.2min(P<0.05),异相睡眠(PS)时间无显著变化(P>0.05)。W、SWS、PS的次数无显著性变化。(二)1μg/0.5μl、0.5μg/0.5μl的溴隐亭注射后,第2～3h的W、SWS、PS的时间和次数均无显著性变化。上述结果提示:双侧VTA微量注射溴隐亭可致大鼠觉醒增加、慢波睡眠减少,但无双相作用。     

湘西碳沥青若干微量元素地球化学特征

 为分析碳沥青的微量元素地球化学特征, 采用Element XR 等离子体质谱分析仪及对选取的碳沥青样品进行测试。结果显示, 碳沥青的微量元素丰度与页岩、围岩差异明显, 其中V(1039.40 μg/g)、Ni(345.90 μg/g)、Sr(227.67 μg/g)和Mo(64.70μg/g)显著富集。对以上4 种元素的赋存和富集模式进行分析, 结果表明:元素V 和Ni 在碳沥青中富集的主要原因包括, 继承了原油微量元素特征、较强的螯合作用和油气演化3 个方面, 在本身绝对含量不减或微增的情况下, 其他元素和有机质总量的亏损在一定程度上突出了V 和Ni 的相对富集;Mo 与V、Ni 具有相似的赋存和富集机理, Sr 的富集可能与油气运移过程中对地层中Sr的溶解和储层热演化过程中的有机质络合作用有关, 但是也可能与Sr 尚不明确的地球化学行为有关。     

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.