诺卡氏菌对养殖水体中氨氮的降解特性研究

应用诺卡氏菌Nocardia对影响氨氮降解的各种主要因素进行了研究,发现降解菌在30℃,pH7．2及氨氮初始浓度0～30mg／L范围内保持高活性,最大降解速率达3．5mg／L·h。当底物浓度大于50mg／L时,平均降解速率线性下降。当接种量(菌悬液／反应液)为20mL/100mL时氨氮的降解是高效与经济的。     

硫酸铁改性活性炭催化微波照射快速降解亚甲基蓝的研究

在硫酸铁改性活性炭存在下，微渡照射能使溶液中的亚甲基蓝迅速降解。对总体积25mL，浓度100mg／L的亚甲基蓝溶液，改性活性炭加入量0．4g／L，微波照射3．0min时亚甲基蓝的降解率可达69．31％。适当提高改性活性炭加入量，如1．0g／L时，同样照射条件下溶液中的亚甲基蓝降解率即可达100％。结果表明，改性活性炭作为微波降解亚甲基蓝的催化剂具有降解速率快，成本低，没有中间产物生成和不会造成二次污染等优点，适合于大规模治理染料废水。另外，采用紫外一可见光谱和离子色谱技术探讨了微波照射时问、亚甲基蓝初始浓度、改性活性炭用量、改性液硫酸铁浓度和酸度以及溶液酸度对亚甲基蓝降解率的影响。     

固定化胶质红环菌降解吡啶的研究

用聚集～交联法固定化胶质红环菌,并在微氧、厌氧条件下,对其降解吡啶的动力学进行研究。实验结果表明：在微氧、厌氧条件下,未驯化的固定化胶质红环菌,在吡啶浓度为100mg/L时,降解动力学方程均遵循零级反应,微氧条件下降解速率常数大于厌氧条件下降解速率常数,该菌适于在微氧条件下降解吡啶。固定化胶质红环菌经驯化后,在微氧条件下,吡啶浓度为50mg／L、100mg／L、200mg／L、300mg／L和500mg／L时,降解动力学方程仍然遵循零级反应,吡啶初始浓度为50～200mg／L时,降解速率常数随着吡啶初始浓度增大而增大;吡啶初始浓度为300～500mg／L时,降解速率常数随着吡啶初始浓度增大而减小。固定化胶质红环菌在微氧条件下,可将吡啶中的氮大部分转化为氨氮。     

纳米TiO2对甲基橙的吸附及光催化降解

采用新型氯化法制备纳米TiO₂，研究了纳米TiO₂悬浆体系对甲基橙溶液的降解脱色情况。研究表明，自制纳米TiO₂对甲基橙具有良好的吸附性，避光暗处也能够对甲基橙得到部分降解作用。考察了避光及不同光源照射下纳米TiO₂对甲基橙的脱色情况，并在 160W汞灯照射下，对甲基橙溶液初始浓度、催化剂投加量、反应时间和反应温度对甲基橙溶液的降解脱色速率的影响情况进行了研究。结果表明，光源对甲基橙的降解脱色速率影响不大；纳米TiO₂投加量为 5.0～13.0g/L时，对100～400mg/L的甲基橙溶液可达到良好的脱色效果；常温情况下纳米TiO₂ 投加量为 13g/L时，与100mg/L的甲基橙溶液反应30min，在160W汞灯照射下甲基橙脱色率可达91.1%，避光暗处脱色率可达86.9%。     

诺卡氏T-01菌降解十二烷基苯磺酸钠的研究

得出了诺卡氏T－01菌对比较难生物降解的十二烷基苯磺酸钠（ABS）有较强的降解能力的结论．当pH＝7～8，ABS的浓度为30～50mg／L，时间为50～60h时，降解效率可达90％以上；ABS的浓度为100g／L以下时仍有较好的降解能力．     

恒电流下原位电生成活性氯氧化降解蒽醌染料

利用形稳阳极原位电生成活性氯,以活性艳蓝KN—R的两个特征波长（592nm和255nm）处吸光度为主要指标,对该染料的脱色及其母体结构氧化降解进行了对比分析．在15A／m^2电流密度、0．1mol／LNa2SO4、0．2mol／L NaCl、0．1mmol／L活性艳蓝KN—R、初始pH=6．4、T=303K的条件下,经4h的电解,可使染料100％脱色,45％左右的染料母体结构被破坏,但电解液的TOC变化不大．实验结果表明,电流密度、氯化钠浓度、染料浓度、温度对染料的脱色及其母体结构氧化降解有较强的影响;染料脱色及其母体结构氧化降解过程遵循准一级动力学．     

CoⅡW12/SiO2的制备及其光催化降解橙黄Ⅱ

合成了钴钨酸（Co^ⅡW12）／SiO2复合催化剂，运用FTIR，CV，UV—vis／DRS等手段对其结构进行了表征．以染料橙黄Ⅱ为模型反应物，对Co^ⅡW12／SiO2-H2O2体系在近紫外光和可见光下的光降解脱色活性进行了研究．结果表明，在125W高压汞灯（λ≥310nm）辐照下，70mg／L橙黄Ⅱ溶液在pH为2．2～6、光照75min，脱色率为60．3％-70．1％；酸性条件下，脱色速率随H2O2浓度升高而升高，脱色过程符合表观一级反应动力学规律．在450W荧光汞灯（λ≥410nm）辐照下，15mg／L橙黄Ⅱ溶液在pH为2．2、光照105min，光脱色率为21．4％；光脱色率随pH升高而降低。     

活性炭吸附法处理染料废水

研究了活性炭对染料废水色度和COD的去除率，考察了温度、pH值和活性炭量对废水脱色率的影响．结果表明．活性炭量是脱色率的主要影响因素．室温下．初始浓度为250mg／L时，处理酸性品红、碱性品红、活性黑B-133染料废水的活性炭最佳用量分别为0．8％、1．0％、2．0％．脱色率均在97％以上．COD去除率分别为63．28％、95．66％、84．62％．     

三维电极电化学法处理茜素红模拟染料废水的研究

用三维电极电化学方法对茜素红模拟染料废水进行降解实验．考察反应器电压、电解时间．支持电解质浓度及废水pH值等因素对降解效果的影响。实验结果表明,以不锈钢作阳极,多孔石墨作阴极,活性碳颗粒作粒电极,在槽电压40V,支持电解质NaCl浓度2g／L．pH值5．1的条件下,初始浓度为300mg／L的茜素虹模拟染料废水电解40min后,脱色率达96％以上,COD去除率达88％以上。     

焦化废水中难降解有机污染物降解特性

利用瓦氏呼吸仪测定微生物耗氧量的方法，研究了焦化废水及其中的难降解有机污染物吡啶、苯、间苯二酚和氯苯的降解特性。结果表明，pH值为7．2时，焦化废水降解率最高；当浓度小于40mg／L时，吡啶和苯可以部分被降解，浓度大于60mg／L时微生物呼吸作用明显地被抑制；污泥驯化有利于有机污染物降解速率的提高。     

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。     

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.