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The conclusions were as follows: theνO-H andνC=O IR absorption maxima shifted towards higher wave numbers after imprinting 17β-estradiol on TFMAA-co-TRIM copolymer with the red shift of theνO-H groups being apparent after precipitation polymerization for 16h while that forνC=O groups being observed after polymerization for 24h. A strong interaction between TFMAA and 17β-estradiol was confirmed by the high selectivity for 17β-estradiol, as indicted by the values of the separation factor of isomers of 17β-estradiol/17α-estradiol (2.28) and the imprinted factor (3.01). Particle diameter of TFMAA-co-TRIM polymer was between 300 nm and 1.5μm, which suited well for solid phase sorbent throughout at low column pressure. The recognition of imprinting TFMAA-co-TRIM polymer for sterol molecules was driven by enthalpy eluted with acetronitile, and low temperature was in favor of the separation of sterol structure analogues on imprinting column. TFMAA-co-TRIM polymer possessed of determinate anti-heat stability, with melting point beginning at 255.84℃, Tp=257.40℃, control TFMAA-co-TRIM polymer and imprinting TFMAA-co-TRIM polymer were respectively decompounded at 267.79℃and 343.11℃, and solid micro-extraction noddle prepared by the special polymerization also showed definite recognition for 17β-estradiol by GC/MS detecting at 270℃. By selection of various washing and elution solvents, elution reagents of close polymerization system were of more advantage in template molecules retention and recognition on molecularly imprinted solid phase extraction column. At a certain extent, progesterone, 17α-estradiol, 17β-estradiol and 4-androstene-3, 17-dione could be intercepted on the MISPE column. Especially, MISPE had high selectivity for progesterone, and imprinting TFMAA-co-TRIM polymer could achieve adsorption balance within 50 min by absorption kinetics test for 17β-estradiol. However, MISPE column showed better selectivity and enrichment property for 17β-estradiol than C18 and CSPE columns according to the data from HPLC and GC/MS analyses. Recovery of 17β-estradiol on MISPE column was up to 85.5% while when prime extracting solution of milk powder was sampled, the recovery of CSPE and C18 columns were 43.7% and 30.7%, respectively.
通过研究阐明:紫外聚合产物TFMAA-co-TRIM中的νO-H振动吸收峰在聚合16h后红移,νC=O振动吸收峰在聚合24h后红移;TFMAA-co-TRIM对雌二醇异构体的印迹因子达到了3.01,α为2.28,优于其它功能单体参与得到的聚合物识别特性;TFMAA-co-TRIM聚合物粒径介于300 nm至1.5μm之间,作为色谱固定相具有良好的通量和低的柱压;在乙腈流动相中,TFMAA-co-TRIM分子印迹固定相的分离过程主要被焓驱动,低温有利于分子印迹固定相分离甾醇结构类似物;TFMAA-co-TRIM分子印迹聚合物在255.84℃时开始熔融,Tp=257.40℃,聚合物CP的降解温度在267.79℃,MIP降解温度在343.11℃,制备的固相微萃取头初步经GC/MS 270℃的耐热性测定;不同的洗提溶剂筛选证明了选择接近聚合溶剂的洗脱体系更有利于MISPE发挥识别效应;分子印迹固相萃取柱对孕酮、17α-雌二醇、17β-雌二醇和雄烯二酮都具有不同程度的保留特性,可作为此类化合物的吸附材料,特别对孕酮强保留的富集特性,可作为孕酮的选择性识别吸附剂,其分子印迹聚合物对17β-雌二醇的吸附动力学测定显示在50 min内基本达到吸附平衡,具有作为传感器核心敏感材料的潜力;对比萃取奶粉中17β-雌二醇性能,MISPE柱比非分子印迹固相萃取柱和C18柱具有更高的保留,回收率依次为85.5%,43.7%和30.7%。
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In November, 1906, the Qing government set up a Postal Department, in charge of water and rail transport as well as the mail, telephone, and telegraph.
清政府创办了一个邮政部门,当时还管电报,电话,铁路,水运。
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Practical test's results shown that the system, realized in the thesis, succeeded in setting up short-range wireless communication link and completing the task of transferring characters, well achieving its preconcerted goal.
运行测试结果表明本论文设计的系统能够成功地建立短距离无线通信链路、有效地完成字符传输的任务,即很好的实现了系统的既定目标。
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NET program design make use of item teaching method in the teaching, to interest in the study that stirs up a student, development the student's team spirit and innovation ability, exaltation the student's comprehensive character, the help student obtains firm fulfillment technical ability to contain better function and a little bit well solves a medium job to living study VC#.
NET程序设计教学中运用项目教学法,对激发学生的学习兴趣,培养学生的团队精神和创新能力,提高学生的综合素质,帮助学生取得扎实的实践技能有较好的作用,较好地解决了中职生学习VC#。
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Results: The mean follow-up of 15 (6~30) months revealed that fractures after operation in all the 5 6 cases. 5 cases nails which in the collum femoris become loose and prolapsus postoperation, but all the 5 cases were obtained ideal union, no deformity and disunion, the activity of legs were very well.
结果 术后随访6~30个月,平均15个月,5例患者术后股骨颈内钉松动脱出,但骨折愈合良好,无畸形及骨折不愈合,下肢活动良好。
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Results: The mean follow-up of 15 (6~30)months revealed that fractures after operation in all the 68 cases.3 cases nails which in the collum femoris become loose and prolapsus postoperation , but all the 3 cases were obtained ideal union, the activty of legs were very well,no else complication.
结果 术后随访6~30个月,平均15个月, 3例患者术后股骨颈内钉松动脱出,但骨折愈合良好,下肢活动正常,未产生其他并发症。
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Results: The mean follow-up of 15 (6~30)months revealed that fractures after operation in all the 5 6 cases.5 cases nails which in the collum femoris become loose and prolapsus postoperation , but all the 5 cases were obtained ideal union, no deformity and disunion, the activty of legs were very well.
结果 术后随访6~30个月,平均15个月,5例患者术后股骨颈内钉松动脱出,但骨折愈合良好,无畸形及骨折不愈合,下肢活动良好。
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The system efficiency of sucker rod pump well in Tahe oil recovery No1 distriction mentioned in this paper has been up to 16.42%.
本文研究的塔河采油一区有杆泵井系统效率平均为16.42%。
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In response to a cue that is not well understood, some parasites differentiate into male and female gametocytes,which are the forms taken up by the mosquito and which can live quiescently in the bloodstream for weeks.
以回应不是好了解的暗示,有些寄生生物区分入男性和女性配子母细胞,是蚊子占去的形式,并且在血液可能居住淡静地几星期。
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Existing literature on the inquiry,collation and analysis,this article had the following major tasks:1st,finite element simulation of the current analytical methods are summarized,and system introduction finite element software ADINA and ANSYS applied in the reinforced concrete built-up section.2nd,system introduction reinforced concrete component material performance as well as reinforced concrete nonlinear analysis main mathematical model. 3rd,the use of ANSYS and ADINA software simply supported beam simulation were compared.4th,uses the ANSYS analysis software,conducted 7 radical center bearing reinforcing steel-side steel pipe concrete short stump simulation test research,the research had indicated the reinforcing steel the existence strengthened the pillar ductility greatly.5th,based on ANSYS,has conducted 2 radical center bearing reinforcing steel-side steel pipe concrete member in bending simulation test research.
通过对现有文献的查询、整理及分析,本文进行了以下主要工作:1、对目前有限元模拟分析方法进行了总结,并系统的介绍了有限元软件ADINA和ANSYS在钢筋混凝土组合结构中应用。2、系统的介绍了钢筋混凝土构件的材料性能以及钢筋混凝土非线性分析的主要数学模型。3、利用ANSYS和ADINA软件对简支梁进行了对比模拟分析。4、利用ANSYS分析软件,进行了7根轴心受压钢骨-方钢管混凝土短柱的模拟试验研究,研究表明钢骨的存在大大加强了柱子的延性。5、利用ANSYS分析软件,进行了2根轴心受压钢骨-方钢管混凝土受弯构件的模拟试验研究。
- 推荐网络例句
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I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""
客人们在卡罗利娜·埃凯家里,举止就文雅一些,因为卡罗利娜的母亲治家很严厉。
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Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.
由著名品牌 Herm è s 设计,这件高贵的制服是香港本土制造,是我们第一套不配帽子的制服。
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Do not 'inflate' your achievements and/or qualifications or skills .
不要 '夸大' 你的业绩或成果,条件或者技能。