离子色谱法分析食用色素中无机阴离子的预分离方法

系统分析了３种不同类型的“吸附剂”（聚酰胺、活性炭和阴离子交换树脂）对色素的吸附条件和吸附性能及７种无机阴离子的洗脱行为。研究结果表明，三者均可用于５种合成食用色素中７种无机阴离子的预分离，回收率达９５％～１０５％，有效地消除了食用色素中无机阴离子分析的基体干扰。     

未澄清酵母均化液中L—天门冬氨酸酶的分离——疏水膨？…

研究了用疏水膨胀床直接从未澄清酵母均化液中分离Ｌ－天门冬氨酸酶的过程。吸附和冲洗采用膨胀床模式，而酶的洗提采用沉降床模式，在适当的疏水条件下，膨胀床中的疏水吸附剂可从未澄清均化液中直接捕集分离Ｌ－天门冬氨酸酶。通过梯度洗提，一次膨胀床吸附过程中，酶活的洗脱率为９５％，均化液中酶的总回收率为６５％，洗脱液纯度为１３倍，本方法将膨胀床和疏水性吸附的特长有机地结合起来，是生物活性蛋白酶分离纯化的一个重要     

大孔吸附树脂对高梁泡鲜果红色素的吸附与洗脱性能

探讨了高粱泡果实红色素的提取条件及大孔吸附树脂对其吸附和洗脱特性．结果表明，高粱泡果实红色素的最适提取剂为酸性EtOH．3种大孔树脂中，X-5型树脂对高粱泡果实红色素的吸附和洗脱性能较好，吸附率达96．17％，解吸率为94．40％，适宜用作高梁泡果实红色素的分离、纯化；适当的色素液浓度、流速、NaCl质量分数及温度均可增大X-5型树脂对色素的吸附率，而用80％～95％EtOH作为洗脱剂，洗脱效果最好．     

贯叶连翘中金丝桃素分离工艺的研究

利用大孔吸附树脂吸附法研究了金丝桃素的提取分离方法，结果表明，贯叶连翘醇提物用D101大孔吸附树脂吸附后，40％乙醇洗脱可以除去大量杂质，80％乙醇可以解吸吸附树脂柱上的金丝桃素，该方法操作简单，消耗低，产品中总金丝桃素含量可达2．13％，提取率为81．3％。     

XSC-700树脂对盐湖卤水中硼的吸附

以新疆某盐湖卤水为原料，采用有限浴法研究XSC-700螯合树脂对硼的吸附性能，测定树脂在不同条件下的吸附量。考察搅拌速率、稀释量、温度、pH、酸度、树脂量等因素对吸附、洗脱的影响。研究结果表明：该树脂在盐湖卤水中对硼有较强的吸附能力，且洗脱性能良好；在稀释量为15％时，吸附曲线随温度升高而变陡，但平衡吸附量基本不变，吸附量受搅拌速率、pH影响较小。硼的洗脱性能良好，选用浓度为0.5 mol/L的盐酸为洗脱剂，控制洗脱剂与树脂量比为8：1(mL：g)时洗脱，洗脱率达到92.6％。     

乙酸松油酯的合成研究

采用弱碱性无水碳酸钾作催化剂，结合真空精馏连续分离醋酸的工艺，由松油醇和醋酐合成了乙酸松油酯，摩尔得率达９２．４％，经真空蒸馏含量达９５．３％．该方法用于乙酸芳樟酯合成，产率也大于９０％．     

未澄清酵母均化液中 L-天门冬氨酸酶的分离——疏水膨胀床直接吸附法(英文)

研究了用疏水膨胀床直接从未澄清酵母（Ｓ．ｃｅｒｅｖｉｓｉａｅ）均化液中分离Ｌ－天门冬氨酸酶的过程．吸附和冲洗采用膨胀床模式,而酶的洗提采用沉降床模式．在适当的疏水条件下,膨胀床中的疏水吸附剂（ＴｓｋｇｅｌＰｈｅｎｙｌ＿Ｔｏｙｏｐｅａｒｌ６５０Ｃ）可从未澄清均化液中直接捕集分离Ｌ－天门冬氨酸酶．通过梯度洗提,一次膨胀床吸附过程中,酶活的洗脱率为９５％,均化液中酶的总回收率为６５％,洗脱液纯度为１３倍．本方法将膨胀床和疏水性吸附的特长有机地结合起来,是生物活性蛋白酶分离纯化的一个重要手段．     

用大孔吸附树脂提取皮质醇

通过对ＮＫ－１０７等８种大孔吸附树脂的筛选，发现ＮＫ－１０７树脂对皮质醇及其类似物有较高的吸附量和洗脱率，ＮＫ－１０７树脂重复使用５次的平均总吸附量及皮质醇的吸附量分别为５０．８ｍｇ／ｍｌ和２７．７ｍｇ／ｍｌ；平均总洗脱率及皮质醇洗脱率分别为８３．０％和８５．１％．     

大孔吸附树脂分离核桃青皮萘醌类成分及其抑菌性研究

以核桃青皮萘醌类成分为分离对象,选用大孔吸附树脂,应用响应面法优化分离参数;考察提取物对大肠杆菌和金黄色葡萄球菌的抑制效果。响应面试验结果显示,在吸附液浓度为0.1 mg/mL、吸附液pH值为2、吸附流速为0.5 mL/min的最优条件下进行树脂吸附,吸附率可达81.89%,各因素对吸附率影响顺序为:吸附液浓度吸附液pH吸附流速;在丙酮洗脱液浓度为95%、洗脱液pH值为3.5、洗脱流速为0.5 mL/min的最优条件下进行树脂洗脱,洗脱率可达70.63%,各因素对洗脱率影响顺序为:洗脱液浓度洗脱流速洗脱液pH;提取物对大肠杆菌和金黄色葡萄球菌均具有明显的抑制作用,且萘醌树脂分离提取物的抑菌性高于粗提物。     

泡沫塑料吸附—原子吸收法测定高纯稀土中的铜

本文研究了用DDTC-聚氨酯泡沫塑料分离富集、火焰原子吸收法测定高纯稀土中微量铜的新方法。试验了pH值、DDTC和KSCN浓度、稀土含量等对泡沫塑料吸附铜的影响及泡沫塑料的吸附能力。吸附率在97％以上,用HNO_3-丙酮洗脱,铜的测定灵敏度达0.06μg/ME/1％吸收。用该法进行实样分析,结果令人满意。     

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.     

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.