絮凝剂产生菌HYY-7的培养条件

从生活污水厂的活性污泥中筛选出一株高效微生物絮凝剂产生菌，鉴定为青霉，命名为 ，其产生的微生物絮凝剂命名为MBF7。该茵产生微生物絮凝剂的最佳培养基为葡萄糖培养基，适宜的培养条件为：葡萄糖培养基初始pH值为4．5～6．0，培养温度为30℃；振荡箱的转速为200r／min，培养时间为3～4d。产生的高效絮凝剂MBF7具有良好的絮凝效果，对于实际排放的染料废水、餐厅废水和生活污水浊度去除率分别为92．5％，96．8％，90．2％。     

复合型微生物絮凝剂的絮凝作用

复合型微生物絮凝剂是采用廉价底物经过多株菌混合发酵后制得的微生物絮凝剂。通过实验测定复合型微生物絮凝剂的絮凝效果。以松花江源水和强酸性废水为对象，测定出了絮凝剂的最佳投加量、最佳pH值范围和助凝剂CaCl2的投加量。实验表明，对于不同的水质，絮凝剂投加量不同，松花江源水的最佳投加量在14mL/L左右；对于酸性废水，投加量要高一些。最佳pH值在7．5左右。复合型微生物絮凝剂需要投加助凝剂才能起到絮凝效果，投加10％氯化钙1．5mL/L就可以达到最佳絮凝效果。温度对絮凝率的影响极小，并且沉降曲线表明，在10℃时，沉降所需时间最短。     

微生物絮凝剂产生菌HF28的筛选与培养条件优化

从污水处理厂的活性污泥中筛选出微生物絮凝剂HF-8,并对菌株的培养基组成和培养条件进行了优化;培养基最佳配方（g／500mL）：蔗糖10g、（NH4）2SO4 0．2g、KH2PO4 2g、K2HPO4 2．5g、NaCl 0．05g、Mg（SO4）·7H2O 0．1g、水500mL;最佳培养条件：温度30℃、初始pH值6．O、摇床转速120r／min,优化之后的絮凝剂对高龄土悬浊液的絮凝率提高到了90．3％。     

微生物絮凝剂产生菌的筛选及其絮凝影响因素

采用常规的细菌分离纯化方法，从活性污泥和农田土壤中筛选到12株微生物絮凝剂产生茵，经复筛得到一株高效絮凝剂产生茵MBFP-7．以高岭土悬浮液为絮凝对象，研究了温度、pH、微生物絮凝剂的投加量和Ca^2 对絮凝活性的影响；探讨了微生物絮凝剂的絮凝机理．     

一株产絮凝剂无花果沙雷氏菌的条件优化

从土壤中筛选得到了1株絮凝效果较好的微生物絮凝剂产生菌——无花果沙雷氏菌,其产生的絮凝剂对高岭土悬液的絮凝活性达94．1％．对该菌株进行了培养条件的优化．实验表明该菌株生产絮凝剂的适宜碳源为乳糖,氮源为酵母膏和尿素,pH为6．0～8．0,无机盐为0．2％的K2HPO4和0．5％的KH2PO4,接种量为1．0％,培养时间为3d,条件优化后絮凝活性达到96．0％．     

天然物质复配铁型絮凝剂及其处理味精废水的研究

采用不同天然物质（城市草炭土、草甸土、火山灰和红壤）与聚合硫酸铁复配，制备一种更为经济的新型絮凝剂，利用其对高浓度有机味精废水进行絮凝实验，并讨论了各组分的不同投加量比例及其絮凝的影响因素．研究结果表明：此种天然物质．聚合硫酸铁复配絮凝剂处理味精废水表现出优良的絮凝性能．其中以草甸土、红壤为天然复配材料处理效果最为显著，其最佳投加量比例为草甸土（g）：聚合硫酸铁（ml）：助剂（g）=11：4：6，最佳pH为7．0-8．0；红壤（g）：聚合硫酸铁（ml）=10：6，最佳pH为1．0-2．0．在此条件下，该天然复配铁型絮凝剂对味精废水的CODcr，去除率远远高于聚合硫酸铁（PFS）本身，分别可达到71．1％和55．0％。     

微生物絮凝剂的絮凝条件及焦化废水净化研究

从活性污泥中筛选出一株能产高效絮凝剂的芽孢杆菌,对该菌产生的微生物絮凝剂进行了絮凝条 件及废水絮凝实验研究。结果表明,微生物絮凝剂最佳絮凝条件为：原水pH值７畅０以上;助凝剂CaCl２ （１ ％ 浓度）适宜投加量为５畅０ ％ ;发酵液的适宜投加量为０畅２ ％ ;发酵液较好的离心条件为n ＝ ４ ０００转桙 min, t ＝ ３０ min。在最佳絮凝条件下,该菌产生的微生物絮凝剂对多种废水净化效果明显。     

高效微生物絮凝剂产生菌BJ-Ⅰ的筛选鉴定及絮凝特性研究

从活性污泥中筛选出1株高效微生物絮凝剂产生菌BJ-Ⅰ,其絮凝率达87．6％．通过生理生化分析及16S rDNA序列鉴定该菌株为短芽孢杆菌（Bacillus brevis）．该菌产絮凝剂的最适碳源和氮源分别为20g/L的葡萄糖和2．0g／L的蛋白胨;适宜的初始pH和培养温度分别为7．0和30℃;在培养基中添加0．5g／L的Mg^2＋有利于菌体生长,但对絮凝剂合成无影响．对该絮凝剂的特性研究结果表明：菌液投放量3％、pH值在5．9、温度为60℃条件下絮凝效果最好,加入浓度为8％的Ca^2＋可显著提高其絮凝活性．实验证明,该菌起絮凝作用的物质存在于发酵液中,主要成分为杂多糖．     

微生物絮凝剂产生菌的鉴定及絮凝特性研究

试验选取菌株PY-M3和PY-F6所产絮凝剂,研究了微生物絮凝剂的添加量、水的pH值、高岭土溶液的浓度、助凝剂的种类、助凝剂的添加量和沉淀时间对絮凝效果的影响,并研究了絮凝剂的絮凝活性分布和微生物絮凝剂的热稳定性,对絮凝效果好的菌株进行了鉴定。结果表明,菌株PY-F6的最佳絮凝条件为絮凝剂投加量30mL/L,pH 8,高岭土悬浊液浓度3g/L,Ca~(2+)的助凝效果最好,质量浓度1%的CaCl_2投加量20mL/L,静置时间20min,菌株PY-M3的最佳絮凝条件为絮凝剂投加量30mL/L,pH 8,高岭土悬浊液浓度3g/L,Ca~(2+)的助凝效果最好,质量浓度1%的CaCl_2投加量30mL/L,静置时间40min;在最佳絮凝条件下,PY-F6絮凝剂的絮凝率达到99%,PY-M3絮凝剂的絮凝率达到96%;两种微生物絮凝剂的活性成分主要存在于上清液中,为菌体细胞分泌的胞外代谢产物而非菌体本身;PY-M3絮凝剂的热稳定性较差,PY-F6絮凝剂的热稳定性较好;PY-F6菌株可以鉴定为黄三素链霉菌(Streptomyces flavotricini)。     

活性炭吸附固定微生物絮凝剂处理淀粉废水的实验条件优化

通过活性炭吸附固定微生物絮凝剂对淀粉废水进行絮凝沉降,探讨活性炭吸附固定微生物絮凝剂处理淀粉废水的最佳实验条件。结果显示:在不同的条件下进行正交试验,选择出处理淀粉废水的最佳絮凝条件为温度40℃、pH值9、投加量5 mL、絮凝时间180 min,废水浊度去除率达到97.7%以上。     

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.     

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.     

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.     

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.     

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.     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-