Study of Ni-LaGaO_3 composite anodes

制备了多种镍-镓酸镧(LaGaO3)复合阳极,并以Ni-LaGaO3为复合阳极,系列Sr、Mg和Co掺杂的LaGaO3为电解质,Sm0.5Sr0.5CoO3(SSC)-LaGaO3为复合阴极,组装单电池。用极化、交流阻抗等技术,对阳极电化学性能进行研究,测试了电池的功率输出特性。Ni-LaGaO3复合阳极的最佳焙烧温度约为1 200℃,焙烧温度显著影响阳极/电解质界面的欧姆电阻和极化电阻。Ni-LaGaO3复合阳极的性能,依赖于所负载电解质及电极中掺入的LaGaO3的性质。随着电解质中Co含量的增加,电池的欧姆电阻减小、电极活性增加,单电池的最大输出功率密度提高。Ni-La0.8Sr0.2Ga0.8Mg0.15Co0.05O3(LSGMC5)|La0.8Sr0.2Ga0.8Mg0.115Co0.085O3(LSGMC8.5)|SSC-LSGMC5电池在800℃、氢为燃料的条件下,最大输出功率密度达0.75 W/cm2;甲烷为燃料的条件下,最大输出功率密度达0.53 W/cm2。Various Ni-lanthanum gallate(LaGaO_3) composite anodes were prepared.Single cells were constructed using Ni-(LaGaO_3) as composite anodes,series of LaGaO_3 as electrolytes,doped Sr,Mg and Co,and Sm_(0.5)Sr_(0.5)CoO_3(SSC)-LaGaO_3 as composite cathodes.The electrochemical characteristics of the anodes were studied using polarization and AC impedance techniques,the output power of cells was measured.The optimum sintering temperature for Ni-LaGaO_3 composite anodes was about 1 200 ℃.The sintering temperature of anode had significant effect on the ohmic resistance and the polarization resistance of the anode/electrolyte interface.The performance of Ni-LaGaO_3 composite anodes depended on the properties of the electrolyte supporting the anode as well as the properties of the LaGaO_3 added into the anode.With the increase of Co content in the electrolyte,the ohmic resistance of the cell decreased and the activity of the electrodes increased,the single cell's maximum output power increased.The maximum power density of Ni-La_(0.8)Sr_(0.2)Ga_(0.8)Mg_(0.15)Co_(0.05)O_3(LSGMC5)｜La_(0.8)Sr_(0.2)Ga_(0.8)Mg_(0.115)Co_(0.085)O_3(LSGMC8.5)｜SSC-LSGMC5 reached(0.75 W/cm~2) at 800 ℃ in H_2,0.53 W/cm~2 in CH_4.福建省科技攻关计划重点项目(2003H046);; 留学回国人员基

Synthesis,structure and electrochemical performance of Mg-doping nickel oxyhydroxide

首次以掺杂Mg的β-nI(OH)2为前驱体,采用k2S2O8为氧化剂,制备出β-羟基氧化镍镁,并应用X射线衍射光谱法(Xrd)、傅里叶变换红外光谱法(fTIr)、热重-差热分析(Tg-dTg)、CV和放电测试对样品的结构和电化学性能进行了表征。The Mg-doping β-NiOOH was firstly synthesized by using Mg-doping β-Ni(OH)2 as precursor,K2S2O8 as oxidizer.The crystal structure and electrochemical performance of the prepared samples were analyzed by XRD,FTIR,TG-DTG,CV and discharge test

Preparation of LiNi_(0.9)Co_(0.1)O_2 material and study on its electrochemical performance

成功采用掺杂和改变前驱体两种方式同时对传统lInIO2正极材料合成进行改进,即用掺杂10%WTCO的β-nIOOH作为前驱体,和lIOH·H2O在空气中进行固相烧结。通过正交方法优化出合成lInI0.9CO0.1O2的最佳烧结温度为600℃,烧结时间为24H;此条件下材料首次充放电效率高达86%,20次循环后可逆放电比容量为167MAH/g,容量保持率高达94%。It is a success for using both doping and changing precursor to improve the traditional cathode material LiNiO2 which is using 10%wt Co doped in the β-NiOOH as the precursor, then solid- phase Sintering with LiOH·H2O in the air.By orthogonal methods we optimize the best sintering temperature is 600 ℃ and sintering time is 24 h for synthesis of the LiNi0.9Co0.1O2; Under these conditions, the first charge and discharge efficiency can be as high as 86%, discharge capacity is to be 167 mAh/g after 20 cycles reversible, and the capacity rates can maintain as high as 94%

Screening research on effective parts of Alisma orientalis( Samuel. ) Juzep. associated with blood glucose decrease in type 2 diabetic mice

目的初步探索泽泻[Alisma orientalis(Samuel.)Juzep.]降低2型糖尿病小鼠血糖的有效部位。方法采用超声提取法获得泽泻乙醇提取物,再分别用石油醚、乙酸乙酯、水饱和正丁醇和水相进行萃取分离,得到的泽泻乙醇提取物及其各溶剂萃取物应用于腹腔注射烟碱、链脲霉素诱导的2型糖尿病小鼠模型。造模成功后,将动物分组,其中空白对照组(未注射链脲霉素和烟碱的小鼠)和2型糖尿病模型组小鼠连续灌胃0.9%Na Cl溶液21 d(灌胃剂量为10μl/g),测试药物组分别连续灌胃泽泻乙醇提取物、泽泻石油醚萃取物、泽泻乙酸乙酯萃取物、泽泻正丁醇萃取物、泽泻水萃取物21 d(各测试药物灌胃高、中、低剂量分别为100μg/g、50μg/g、25μg/g),阳性对照组连续灌胃罗格列酮溶液21 d(灌胃剂量为10μg/g),每组8只小鼠,筛选具有降低2型糖尿病小鼠血糖的泽泻有效部位。用具有降低2型糖尿病小鼠血糖的有效部位处理3T3-L1前脂肪细胞,观察其对前脂肪细胞分化过程的影响。结果与2型糖尿病模型组比较,连续灌胃泽泻乙酸乙酯萃取物21 d(剂量为100μg/g)降低了2型糖尿病小鼠的血糖,改善了口服葡萄糖耐受试验(oral glucose tolerance test,OGTT)过程中的糖耐量(P<0.01)。1 mg/L和10 mg/L的泽泻乙酸乙酯萃取层均能促进前脂肪细胞的分化过程。结论泽泻乙酸乙酯萃取物降低了2型糖尿病小鼠血糖,促进了3T3-L1前脂肪细胞分化,但其具体作用机制尚需深入研究。Objective To explore the effective parts of Alisma orientalis( Samuel.) Juzep. associated with blood glucose decrease in type 2 diabetic mice.Methods Ethanol extracts from A. orientalis were obtained by ultrasonic extraction. Then,the ethanol extract was extracted and separated with petroleum ether,ethyl acetate,water saturated n-butanol and water respectively. After decompressing concentration,these solvent extractions were applied to type 2 diabetic mice model induced by intraperitoneal injection of streptozotocin and nicotine. After successful modeling,the mice were divided into the blank control group( without injection of streptozotocin and nicotine),model group of type 2 diabetes mellitus,positive control group and test drug groups,8 in each group. The blank control group and model group were treated with 0. 9% Na Cl at the dose of 10μl / g,the test drug groups were treated with corresponding extracts from different solvent extractions described above at the high-,mid-,low-dose of 100,50,25 μg / g respectively. The positive control group was treated with rosiglitazone at the dose of10μg / g. The treatment course was 21 days for intragastric administration. The effective parts of Alisma orientalis( Samuel.) Juzep. associated with blood glucose decrease in type 2 diabetic mice were screened and then the effect of the screened effective part on the differentiation of 3T3-L1 pre-adipocyte was observed.Results Compared with the model group,the blood glucose was decreased after the intragastric administration with ethyl acetate extract of A. orientalis at dose of100μg / g for 21 days and the glucose tolerance during the oral glucose tolerance test( OGTT) was improved( P < 0. 01). The differentiation of pre-adipocyte was promoted when the ethyl acetate extract of A. orientalis at the concentration of 1 mg / L and 10 mg / L. Conclusion The ethyl acetate extract of A. orientalis reduced the blood glucose in type 2 diabetic mice and promoted the differentiation of 3T3-L1 pre-adipocytes,but the specific mechanism still need to be further studied.福建省科技厅自然科学基金青年创新项目;; 厦门市卫计委资助项目(2014D008),厦门市卫计委资助项目(2015-ZQN-JC-45);; 福建省卫生系统中青年骨干人才培养项目基础项目;; 福建省科技厅自然科学基金(2015J01065);; 福建省教育厅中青年教师教育科研项目杰青项目(JA14421),福建省教育厅中青年教师教育科研项目(JA13425);; 厦门市科技局科技计划高校创新项目(3502Z20143026),厦门市科技局科技计划项目(3502Z20144031);; 厦门医学高等专科学校科研基金(Z2013-12,Z2013-25

塔里木沙漠公路防护林生态工程的综合生态环境效应

为了探讨重大工程的生态环境效应,从风沙环境、土壤环境、小气候、生物多样性和地下水环境5个方面对塔里木沙漠公路防护林工程的综合生态环境效应进行了研究.结果表明:(1)防护林改变了近地表风沙运动过程,防沙体系内风速、输沙率降低幅度分别达64%~80%和87.45%~99.02%,风沙流结构、沙物质粒度、地表蚀积状况也发生了明显变化;(2)与自然流沙地相比,防护林土壤容重减小,全盐含量、总孔隙度和含水量增大,土壤肥力质量明显提高,其变化基本呈现"先快后慢"的规律;(3)防护林对于小环境改善作用明显,距地面6m范围内,林地不同高度的空气温度普遍低于自然流沙地,而空气湿度则高于自然流沙地,林地土壤温度也低于自然流沙地;(4)随着防护林内生境的变化,土壤微生物种类显著增加,但不同种类微生物的种群分布并不均匀;(5)目前防护林灌溉抽水对地下水位、地下水矿化度的影响不大,水位在厘米级范围波动,矿化度的变化幅度在±1g·L-1左右,且没有明显的变化趋势

五轴增减材混合加工中心集成开发技术研究

以实现复杂零部件快速增材和高精度减材的复合加工为目的,开发了五轴联动增减材混合加工中心。在此基础上阐述机床增材与减材的设计开发过程及增减材集成控制原理,分析机床整体精度的控制方法,进行了相关增减材试验。采用航空发动机叶轮和五轴机床验收标准中的圆锥台试件做减材试切加工,针对叶轮叶片及S试件进行增材加工的工艺算法优化和对应的增材试验,初步得到了较符合预期的加工效果

定量磁化率成像重建方法及其应用

磁共振成像(MRI)中,相位图像包含丰富的组织磁化率变化信息,获取相位图像不需要额外的扫描时间.组织中的顺磁性物质会影响组织磁化率差异,从而导致局部磁场不均匀.对组织内顺磁性物质的定量有利于许多脑血管疾病和神经系统疾病的诊断,但利用局部相位信息重建组织磁化率分布是一个不适定逆问题,目前仍然有许多问题亟待解决.该文着重介绍定量磁化率成像(QSM)的原理、重建方法及其在MRI中的应用.国家自然科学基金资助项目(81171331,11174239);中央高校基本业务费资助项目(2010121101

太子参环肽类化合物Pseudostellarin E对3T3-L1前脂肪细胞分化和葡萄糖吸收的作用

目的探讨太子参环肽类化合物Pseudostellarin E是否具有治疗2型糖尿病的潜力。方法在3T3-L1前脂肪细胞中应用了葡萄糖吸收试验和分化模型。结果 Pseudostellarin E不仅加速3T3-L1前脂肪细胞分化进程,而且在高浓度(30m M)葡萄糖条件下增加了分化的脂肪细胞对胰岛素刺激的葡萄糖的吸收。结论上述结果表明,Pseudostellarin E可能具有治疗糖尿病的潜能。国家自然科学基金面上项目(81773601);;福建省教育厅2015年第二批高等学校优秀学科(专业)带头人赴海外访学研修资助项目(闽教人[2015]103号);;福建省自然科学基金计划资助项目(2015J01065);;福建省卫生系统中青年骨干人才培养项目2015年资助计划基础项目(2015-ZQN-JC-45);;福建省厦门市科技局科技计划高校创新项目(3502Z20143026);;厦门医学院科研项目(Z2013-12,Z2013-25

The primary investigation of the value of whole body diffusion weighted imaging in diagnosis of metastatic tumor

背景与目的:随着临床上晚期肿瘤病例的增多,为了解治疗前、后全身转移瘤的大小及数量变化的实际情况,以往多采用分部位进行CT和(或)Mr扫描,少部分有条件的患者采用PET检查,但这些方法可能存在过多地暴露于射线、检查时间过长及经济负担过重等问题。因此,我们探讨磁共振的全身弥散加权成像(WHOlE bOdy dIffuSIOn WEIgHTEd IMAgIng,WbdWI)方法对肿瘤及转移灶的检出准确性及其临床应用的可行性。方法:对68例临床已发现原发肿瘤及多个转移灶或发现多个肿瘤病灶,但原发灶不明确的患者进行WbdWI检查,其中男性49例;女性19例。平均年龄61岁。68例均与CT和(或)MrI的检查结果进行比较,其中17例与PET的检查结果相比较。对病灶的检出率,以病灶长径大小分为:<1CM,≥1~<2CM,≥2~<3CM及≥3CM以上4组进行计数分析,同时,对不同部位间的病灶检出情况进行分析。结果:WbdWI对4组病灶的检出率分别为30%、78%、96%及100%。在各个部位的敏感性和准确性中以骨骼最高。对位于肺部小于1CM的病灶和位于颈部、盆腔小于2CM的淋巴结的诊断存在一定困难。结论:WbdWI对大范围的肿瘤病灶筛查是安全、简便、有效和经济的检查新方法。随着技术参数的进一步完善,WbdWI在发现和诊断全身多发肿瘤方面,具有良好的发展潜力。因此,本技术有望作为一种新的、效果好于PET的全身检查技术。Background and purpose:With the increased number of advanced tumors,it is important to evaluate the actual pre-and post-treatment changes in metastatic diseases,such as tumor size and tumor quantity.Previously,CT and/or MRI scan were usually applied,only a few patients could pay for PET(positron emition tomography).But there were several problems we should face,including redundantly exposure to radiation,too long verification time and heavy financial burden.Therefore we evaluated the application of whole body diffusion weighted imaging in diagnosing of tumor and metastatic tumor.Methods:sixty-eight patients(49 male,19 female,age from 29 to 84 years with mean age of 61 years) with a variety of tumors were investigated by combined CT and/or MRI scan,seventeen patients were compared with positron emition tomograph(PET).All tumors were classified into four groups,according to longest diameter of <1 cm,≥1-<2 cm,≥2-<3 cm and ≥3 cm.At the same time,the positive detection rates between different parts of the lesions were analyzed.Results:The detection rate of the four groups were 30%,78%,96% and 100%,respectively.The skeletal system had the highest sensitivity and accuracy in every part of body.There was difficulty in diagnosing lung cancer with longest diameter less than 1 cm as well as tumors located in neck and pelvic with longest diameter less than 2 cm.Conclusion:Whole body diffusion weighted imaging is secure,convenient,effective and economic for screening wide-ranging tumor focus.After improvement of parameters,WBDWI could be as a new effective whole body examination technique.厦门市科技计划项目(No:3502Z20074017