简介：Thepaperdealswiththeinfluenceofanodematerialontheefficiencyofdegradationfororganicpollutantsinwatersystem.Theelectrochemicalperformanceoffluorineiondopedleaddioxide(F--PbO2)electrodeforthedegradationofanilinewascomparedwiththatofundopedleaddioxide(PbO2)electrodebyultraviolet-visible(UV-Vis)spectroscopy,linearvoltammetryandotheranalyticalmethods,suchasthemeasurementbychemicaloxygendemandanalyzer,highperformanceliquidchromatographyandscanningelectronmicrography.ItwasshownthatbothPbO2electrodeandF--PbO2electrodecouldmakeanilinebemineralizedcompletelyandhavethesamedegradationcourse,butF--PbO2electrodehasmuchhigherelectrocatalyticactivitythanundopedPbO2electrodefortheelectrochemicaldegradationofaniline.TheexperimentalresultsconfirmthatF--PbO2electrodehasmuchhigherpotentialforoxygenevolutionthanundopedPbO2electrode.

简介：摘要目的探究E2F2基因在子宫内膜癌中的表达及与生物学行为的相关性。方法选择2015年3月至2018年4月本院妇科获取的30例正常子宫内膜标本、25例子宫内膜增生标本及73例子宫内膜癌组织纳入研究。采用RT-PCR及链霉菌抗生物素蛋白-过氧化酶连接(SP)法测定3种组织E2F2 mRNA表达情况，并分析子宫内膜癌组织E2F2蛋白表达与临床病理参数之间的关系。结果子宫内膜癌组织E2F2 mRNA表达量高于子宫内膜增生组织及正常子宫内膜组织，差异有统计学意义(P<0.05)；正常子宫内膜、子宫内膜增生及子宫内膜癌组织E2F2蛋白阳性表达率分别为10.00%、16.00%及52.05%，组间比较差异有统计学意义(P<0.05)；国际妇产科联盟(FIGO)分期为Ⅲ～Ⅳ期、中低分化、有淋巴结转移及肌层浸润≥1/2的子宫内膜癌患者E2F2蛋白阳性表达程度显著高于FIGO分期为Ⅰ～Ⅱ期、高分化、无淋巴结转移及肌层浸润<1/2的患者(P<0.05)。结论子宫内膜癌组织E2F2表达上调，其表达程度与患者FIGO分期、分化程度、淋巴结转移及肌层浸润相关。

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简介：随着软件技术的的发展和就业形势的严峻，软件人才正由过去的白领向蓝领转变，这就需要的熟练编程的技术工人或基础程序员，即“软件蓝领”的需求量呈逐年上升趋势。高职院校的计算机专业的培养对象正是适应社会需求的“软件蓝领”，现就笔者这几年的教学实践经验，在QBASIC程序设计课中采用任务驱动教学法进行简单探讨。

简介：研究并解决了以下三个问题：关于Γ分布与Z分布间的关系，指出两个相互独立的Γ变量之商为Z变量；关于X^2分布与F分布间的关系，指出两个相互独立的X^2变量之商为，变量；关于上述两个问题的反问题．

简介：克孜尔水库主副坝之间存在F2断层,且断层仍在活动,本文根据实测资料对F2断层除险加固防渗效果作了评价,认为防渗达到了一定效果,后期仍需加强监测。

简介：TheproblemsofcharacteristicpolynomialassignmentinFomasini-Marchesini(F-M)modelⅡof2-Dsystemsareinvestigated.Thecorrespondingclosed-loopsystemsdescribedbyF-MmodelIIareobtainedviathestatefeedback.Usingthealgebraicgeometrymethod,thecharacteristicpolynomialassignmentinthedosed-loopsystemsisdiscussed.Intermsofthetheoryofalgebraicgeometry,theproblemofcharacteristicpolynomialassignmentistransferredtotheonewhetherarationalmappingisonto.SufficientconditionsforalmostarbitraryassignmentcoefficientsofcharacteristicpolynomialinF-MmodelⅡof2-Dsystemsviastatefeedbackarederived,andtheyareavailableformulti-inputcases.Italsohasbeenshownthatthismethodcanbeappliedtoassignthecharacteristicpolynomialwithoutputfeedback.Thesufficientconditionsforalmostarbitraryassignmentcoefficientsofcharacteristicpolynomialofmulti-input2-DsystemsdescribedbyF-MmodelⅡwithoutputfeedbackareestablished.

简介：竞争性寡聚脱氧核糖核酸识别转录因子的DNA结合域,抑制了转录因子对基因的转录调控,转录因子E2F作为潜在的治疗靶点,可以用于抑制肾小球系膜细胞和血管内皮细胞的增生,在部分异常增生的疾病中显示了一定的应用前景.

简介：目的探索不同f2/f1比值对DPOAEs幅值的影响,寻找最佳的测试参数,以得到最大的DPOAEs测值.方法对12例(24耳)正常青年人进行不同f2/f1比值条件下的DPOAEs幅值测试.结果当f1/f1=1.220时,DPOAEs幅值最大(P＜0.05或P＜0.01).当f2/f1=1.232时,除了f2=2002Hz处以外,其DPOAEs幅值与f2/f1=1.220时无显著性差异(P＞0.05).其他f2/f1值的DPOAEs幅值均较低,多数测值与f2/f1=1.220时相比均有显著性差异(P＜0.05或P＜0.01).结论f2/f1=1.220～1.232时,DPOAEs测值最大,此范围为最佳测试参数值.

简介：通过理论模拟计算详细分析了KBe2BO3F2（KBBF）晶体的光学倍频特性,得到了Nd∶YVO4激光6倍频输出的深紫外激光光源（177.3nm）的相关技术参数。结果对于KBBF晶体用于产生深紫外全固态激光（DPL）的实验研究提供了重要的理论依据。

简介：Quasiclassicaltrajectorycalculation(QCT)isusedfrequentlyforstudyingcollisionalenergytransferbetweenhighlyvibrationallyexcitedmoleculesandbathgases.Inthispaper,theQCToftheenergytransferbetweenhighlyvibrationallyexcitedC6F6andN2,O2andgroundstateC6F6wereperformed.TheresultsindicatethathighlyvibrationallyexcitedC6F6transferredvibrationalenergytovibrationaldistributionofN2,O2andgroundstateC6F6,sotheyareV-Venergytransfer.EspeciallyitismainlyV-VresonanceenergytransferbetweenexcitedC6F6andgroundstateC6F6,excitedC6F6transfersmorevibrationalenergytogroundstateC6F6thantoN2andO2.ThevaluesofQCT,-〈△Evib〉ofexcitedC6F6aresmallerthanthoseofexperiments.

简介：摘要：本文针对祥云烟区C4F等级质量合格率偏低的问题，通过对部分C4F抽检等级合格率数据统计分析，发现影响C4F等级合格率的主要原因是混入X2F造成的，通过C4F和X2F混级原因分析，提出应对措施并加以实践，最终用数据验证解决措施的可行性和实效性。

简介：（本课选自人教版义务教育课程标准实验教科书《英语》九年级。）教材分析该单元话题是谈论我们所发生的变化（Howwehavechanged）。SectionB部分在SectionA的话题基础上进行延伸和拓展，由描述人物性格，外貌变化转向讨论人物行为习惯、爱好；在语言上，该部分除了进一步巩固SectionA所学重点语言内容外，还复习巩固了有关行为习惯及爱好的短语，同时还通过语篇呈现了其他词语；从技能上看，该部分由听、说转向综合性的听、读、

简介：基于迅驰2平台的华硕新品F8Vr已经上市，借助新平台的性能优势和时尚外观，F8Vr受到了广泛的市场关注。小编从市场了解到，目前，一款时尚的蓝色版F8Vr系列机型也同时到货，追求品味与个性的消费者又多了一个很好的选择。

简介：设函数f(x)=|α-2x|,α>0,x∈[0,α].设m为大于1的奇数,A_m={x|x/α=h/m,h2~n≡1或2~n≡-1(modm),n∈Z~+).本文研究了f(x)分别包含在区间[0,α]中和集合A_m中的n-周期轨数。所得结果在研究Kaprekar问题中有重要的应用。

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简介：近些年来，笔者作为一名工程技术人员，长期从事热水器相关的阀门设计，对中外各类电磁阀门略有研究。3V自吸电磁阀是笔者开发生产的阀门的一种，故对现有电磁阀行业标准QB／T2278．2-96《自吸电磁阀》中一些问题总存在一些疑问及个人的见解，提供给大家一起探讨。

简介：AbstractBackground:Pancreatic stellate cells (PSCs) activation plays a critical role in the development of chronic pancreatitis. Previous studies confirmed that thromboxane A2 receptor (TxA2r) was overexpressed in activated PSCs in rats. The purpose of this study was to investigate the role of TxA2r in the activation of PSCs induced by 8-epi-prostaglandin F2α (8-epi-PGF2α).Methods:TxA2r expression in both quiescent and activated PSCs was detected by immunocytochemistry and immunoblot assay. Isolated PSCs were treated with 8-epi-PGF2α (10-6, 10-7, 10-8 mol/L) for 48 h, and SQ29548 (10-4, 10-6, and 10-7 mol/L), a TxA2r-specific antagonist, for 48 h, respectively, to identify the drug concentration with the best biological effect and the least cytotoxicity. Then isolated PSCs were treated with SQ29548 (10-4 mol/L) for 2 h, followed by 10-7 mol/L 8-epi-PGF2α for 48 h. Real-time polymerase chain reaction was performed to detect the messenger RNA (mRNA) levels of α-smooth muscle actin (α-SMA) and collagen I. Comparisons between the groups were performed using Student’s t test.Results:TxA2r was up-regulated in activated PSCs in vitro compared with quiescent PSCs (all P < 0.001). Compared with the control group, different concentrations of 8-epi-PGF2a significantly increased mRNA levels of α-SMA (10-6 mol/L: 2.23 ± 0.18 vs. 1.00 ± 0.07, t= 10.70, P < 0.001; 10-7 mol/L: 2.91 ± 0.29 vs. 1.01 ± 0.08, t= 10.83, P <0.001; 10-8 mol/L, 1.67 ± 0.07 vs. 1.00 ± 0.08, t= 11.40, P < 0.001) and collagen I (10-6 mol/L: 2.68 ± 0.09 vs. 1.00 ± 0.07, t = 24.94, P < 0.001; 10-7 mol/L: 2.12 ± 0.29 vs. 1.01 ± 0.12, t = 6.08, P < 0.001; 10-8 mol/L: 1.46 ± 0.15 vs. 1.00 ± 0.05, t = 4.93, P = 0.008). However, different concentrations of SQ29548 all significantly reduced the expression of collagen I (10-4 mol/L: 0.55 ± 0.07 vs. 1.00 ± 0.07, t = 10.47, P < 0.001; 10-6 mol/L: 0.56 ± 0.10 vs. 1.00 ± 0.07, t = 6.185, P < 0.001; 10-7 mol/L: 0.27 ± 0.04 vs. 1.00 ± 0.07, t= 15.41, P < 0.001) and α-SMA (10-4 mol/L: 0.06 ± 0.01 vs. 1.00 ± 0.11, t= 15.17, P < 0.001; 10-6 mol/L: 0.28 ± 0.03 vs. 1.00 ± 0.11, t= 11.29, P < 0.001; 10-7 mol/L: 0.14 ± 0.04 vs. 1.00 ± 0.11, t= 12.86, P < 0.001). After being treated with SQ29548 (10-4 mol/L) and then 8-epi-PGF2α (10-7 mol/L), the mRNA levels of a-SMA (0.20 ± 0.08 vs. 1.00 ± 0.00, t= 17.46, P < 0.001) and collagen I (0.69 ± 0.13 vs. 1.00 ± 0.00, t = 4.20, P = 0.014) in PSCs were significantly lower than those of the control group.Conclusions:The results show that 8-epi-PGF2α promoted PSCs activation, while SQ29548 inhibited PSCs activation induced by 8-epi-PGF2α. The result indicated that TxA2r plays an important role during PSC activation and collagen synthesis induced by 8-epi-PGF2αin vitro. This receptor may provide a potential target for more effective antioxidant therapy for pancreatic fibrosis.

简介：<正>文言诗文行文简洁,语言凝练,与现代汉语在词义、语法等方面存在着很大差异,学生难以阅读和理解。教学中,如果我们能将文言诗文教学与汉字教学结合起来,一定会收到事半功倍的效果。人教版七年级语文上册第六单元《智子疑邻》和《塞翁失马》两则寓言中"父"多次出现。教学中,如果我们不正确理解,就会导致对文本的错误解读。其中,"其邻人之父亦