Ca/P比对合成骨灰瓷原料的晶相和显微结构的影响

以氧化钙和磷酸为起始原料合成骨灰瓷原料.采用XRD和SEM方法表征了合成料的晶相与显微结构,探讨了不同Ca/P的比值对结构的影响.结果表明:合成料存在α-Ca3(PO4)2、β-Ca3(PO4)2、Ca10(PO4)6(OH)2和CaO四个晶相.Ca/P比值从1.0→1.6,β-Ca3(PO4)2含量增加,α-Ca3(PO4)2含量降低;Ca/P比值从1.6→2.0,β-Ca3(PO4)2含量降低,而α-Ca3(PO4)2含量增加;Ca/P=1.6时,β-Ca3(P4)2含量最高,因此选择其为最佳的配方.对应的晶相含量(质量分数)分别为:β-Ca3(PO4)2为76.0%,α-Ca3(PO4)2为6.6%,Ca10(PO4)6(OH)2为9.2%,CaO为7.7%.     

4-氨基邻苯二甲酰亚胺的制备与表征

以4-硝基邻苯二甲酰亚胺(4-NP)为原料,采用铁粉还原法制备4-氨基邻苯二甲酰亚胺(4-AP).考察了还原反应温度、反应时间、铁粉的用量、氯化铵的用量等因素对4-AP收率的影响.结果表明:当还原反应温度为80℃、反应时间为3 h、n(铁粉):n(硝基化合物)为3.5:1.0、n(氯化铵):n(铁粉)为0.3:1.0时,产物的收率为91.08%、熔点为292.7～292.9℃.并通过红外光谱对产物进行了结构表征,与标准图谱一致.     

1,3,5-三(4-(烯丙氧基)苯基)-1,3,5-三嗪的合成

以对乙酰氨基酚、氯丙烯为原料合成了4-烯丙氧基乙酰苯胺,4-烯丙氧基乙酰苯胺经盐酸水解得到4-烯丙氧基苯胺,2步反应的总产率为66.5%.4-烯丙氧基苯胺与甲醛水溶液反应得到1,3,5-三(4-(烯丙氧基)苯基)-1,3,5-三嗪,产率为70.9%.采用傅里叶红外光谱(FT-IR)和核磁共振(1H-NM R)对目标产物及其中间体进行了表征.     

1,3,4-噁二唑取代芘衍生物光电性质的理论研究

以芘为核心、苯基丁二炔为桥梁、2,5-二苯基-1,3,4-噁二唑为取代基,设计了一系列可用于有机发光二极管(OLEDs)的新型发光材料,即1-[4-(4-(4-(2-(4-叔丁基)苯基1,3,4-噁二唑-5-基)苯基)丁二炔基)苯基]芘(1)、1,3-[4-(4-(4-(2-(4-叔丁基)苯基1,3,4-噁二唑-5-基)苯基)丁二炔基)苯基]芘(2)、1,3,6-[4-(4-(4-(2-(4-叔丁基)苯基1,3,4-噁二唑-5-基)苯基)丁二炔基)苯基]芘(3)、1,3,6,8-[4-(4-(4-(2-(4-叔丁基)苯基1,3,4-噁二唑-5-基)苯基)丁二炔基)苯基]芘(4).为了合理解释结构和性质之间的关系,采用量子化学方法详细地研究了它们的结构、电化学性质及光学性质.计算结果表明,在芘上添加不同数目的取代基2,5-二苯基-1,3,4-噁二唑,可调节该类化合物的电子结构和光谱性质.增加芘在1,3,6,8-位上取代基的数目,化合物的电子注入性能增强,电子光谱也在一定程度上发生红移.其中,化合物1发蓝光,波长为440 nm;而化合物2-3则发绿光,波长为508~543 nm.4种化合物有很大潜能可作为发光材料应用于OLEDs.     

1,4-二(4-羧基苯氧基)苯的制备及表征

为了对1,4-二(4-羧基苯氧基)苯进行研究,对氟苯甲腈和对苯二酚反应制备了1,4-二(4-腈基苯氧基)苯,并采用1,4-二(4-腈基苯氧基)苯水解法制备了新型二酸单体1,4-二(4-羧基苯氧基)苯.通过考察反应温度、摩尔比对1,4-二(4-腈基苯氧基)苯以及1,4-二(4-羧基苯氧基)苯产率的影响,得到了最佳合成工艺条件.进行了熔点测定、红外以及核磁表征,结果表明合成的二腈为1,4-二(4-腈基苯氧基)苯,合成的二酸为1,4-二(4-羧基苯氧基)苯.     

NaOH共沉淀法制备尖晶石型CoxZn1-xFe2O4纳米晶

以CoSO4、ZnSO4和Fe2(SO4)3为原料,NaOH为沉淀剂,利用化学共沉淀法制备了CoxZn1-xFe2O4纳米晶;通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)和振动样品磁强计(VSM)分别对CoxZn1-xFe2O4纳米晶的形貌、尺寸、结构和磁性能等进行表征.结果表明制备的CoxZn1-xFe2O4均为尖晶石结构,晶粒为球形,粒径在30～60 nm之间.样品的比饱和磁化强度(σs)、矫顽力(Hc)随钴含量的增加而增加,样品逐渐从ZnFe2O4的顺磁性转变为CoFe2O4的亚铁磁性.     

一类烷基环己基苯甲酸酯类液晶的合成

以4-(4-乙基环己基)苯甲酸、4-(4-丁基环己基)苯甲酸、4-(4-戊基环己基)苯甲酸为原料,经酰化、酯化两步合成4-(4-烷基环己基)苯甲酸(3-氟-4-氰基)苯酚酯,运用FTIR、1HNMR、HPLC和EA对其分子结构进行了表征,为进一步研究其液晶性能奠定了良好的基础.     

四羧基单核金属酞菁配合物的表征

采用高温熔融法制备了3种带有四羧基的单核金属酞菁配合物,通过红外光谱、紫外-可见光谱、热重分析等对产物进行表征.结果表明,ZnPc(COOH)4、CuPc(COOH)4、FePc(COOH)4在紫外-可见光区域的最大吸收波长分别为645、641、632 nm,其热稳定性优劣顺序为FePc (COOH)4＞ ZnPc (COOH)4＞CuPc-(COOH)4.     

硫酸铁铵的热分解过程及产物的催化活性

用非等温热分析法研究了硫酸铁铵的热分解过程,失重过程可用下式表示： NH4Fe(SO4)2· 12H2ONH4Fe(SO4)2· 6H2ONH4Fe(SO4)2Fe2(SO4)2 .以柠檬酸和正丁醇为原料,考察了热分解产物的催化活性.实验表明在 600℃时硫酸铁铵的热分解产物具有较高的催化活性,在醇酸比为 5∶ 1、催化剂用量为 3％ (以酸的质量为准 )、反应 4 h时酯化率约 85％.     

巯基化合物和磷酸盐及其类似物对鲍鱼碱性磷酸酶的抑制作用

研究二巯基苏糖醇(DTT)、巯基乙醇(ME)等巯基化合物及磷酸盐(Na2HPO4)、砷酸盐(Na2HAsO4)、鎢酸盐(Na3WO4)和钼酸盐(Na3MoO4)对鲍鱼碱性磷酸酶(ALP)活力的影响.结果表明这些效应物对该酶都具有明显的抑制作用,而且它们的抑制作用强度依次为DTT＞ME;Na2HPO4＞Na3WO4＞Na2HAsO4＞Na3MoO4.进一步研究这些效应物对该酶的抑制作用机理,表明巯基化合(DTT、ME)均非竞争性抑制;Na2HPO4、Na2HAsO4和Na2HWO4表现为竞争性抑制;本文测定了它们的抑制常数并加于比较.     

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.