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Fracture behavior and microstructure analysis of Al2O3–MgO–CaO castables for steel-ladle purging plugs

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International Journal of Minerals,Metallurgy and Materials 2016年第11期23卷 1333-1339页

作者： Bin Long gui-ying Xu Yong Li Andreas Buhr School of Materials Science and engineering University Science and Technology Beijing Beijing 100083 China Almatis Qingdao Co. Ltd. Qingdao 266071 China Almatis GmbH Frankfurt 60528 Germany

Three different castables based on the Al_2O_3–MgO –CaO system were prepared as steel-ladle purging plug refractories： corundum-based low-cement castable（C-LCC）, corundum-spinel-based low-cement castable（C-S-LCC）, and corundum-spinel no-cement castable（C-S-NCC）（hydratable alumina（ρ-Al_2O_3） bonded）. The fracture behavior at room temperature was tested by the method of ＂wedge-splitting＂ on samples pre-fired at different temperatures; the specific fracture energy G′f and notched tensile strength σNT were obtained from these tests. In addition, the Young＇s modulus e was measured by the method of resonance frequency of damping analysis（RFDA）. The thermal stress resistance parameter R′′′′ calculated using the values of G′f, σNT, and e was used to evaluate the thermal shock resistance of the materials. According to the microstructure analysis results, the sintering effect and the bonding type of the matrix material were different among these three castables, which explains their different fracture behaviors.

关键词： castables alumina magnesia copper oxide fracture behavior microstructure thermal shock resistance

云南4个产区咖啡豆的主要风味成分及感官品质分析

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热带作物学报 2024年第7期45卷 1445-1454页

作者：陈云兰李积华陈文进桂花李学玲云南农业大学热带作物学院云南普洱665000 中国热带农业科学院农产品加工研究所/农业农村部热带作物产品加工重点实验室广东湛江524001 普洱学院云南普洱665000

本研究以云南4个产区即西双版纳(A、B、C)、普洱(D、e、F)、临沧(G、H、I)、保山(J、K、L)的12个咖啡生豆样品为原料,分析咖啡主要风味前体物质成分含量及感官品质的差异。采用理化分析法测定蛋白质、脂肪、还原糖的含量,采用全自动氨... 详细信息

本研究以云南4个产区即西双版纳(A、B、C)、普洱(D、e、F)、临沧(G、H、I)、保山(J、K、L)的12个咖啡生豆样品为原料,分析咖啡主要风味前体物质成分含量及感官品质的差异。采用理化分析法测定蛋白质、脂肪、还原糖的含量,采用全自动氨基酸分析仪测定氨基酸组成及含量,采用高效液相色谱法测定咖啡因、绿原酸含量,对12种咖啡豆样品进行烘焙,对咖啡熟豆采用色度学系统分析色差,采用杯品的方式测定感官品质。结果表明:12个咖啡样品的蛋白质含量在11.73~14.72 g/100 g之间,脂肪含量为9.1%~15.9%,还原糖含量为5.83~6.26 g/100 g;12个样品中均检测出16种氨基酸,而蛋氨酸均未检出,总氨基酸含量在10.18~17.25 g/100 g之间,孟连县勐马镇帕亮村(e)咖啡豆样品的总氨基酸含量最高,保山市隆阳区白花岭村(K)咖啡豆样品的总氨基酸含量最低;咖啡因含量在13.73~15.74 mg/g之间,绿原酸含量为20.97~32.51 mg/g。景洪市普文镇南岛河村(B)的咖啡熟豆色泽最明亮,色调度和色调角较好;保山市高黎贡山(J)的咖啡熟豆较其他咖啡更红润,色调角相对较差;e咖啡熟豆和临沧市永德县大雪山乡(I)的咖啡熟豆偏蓝,e咖啡豆色调度和色调角偏好。感官评价总分在42.79~46.09之间,保山市昌宁县老地基咖啡种植园(L)的咖啡豆感官评分最高,景洪市勐旺乡老黄寨村(A)的咖啡豆感官评分最低。综上,不同产区咖啡生豆的主要风味成分含量存在一定差异,不同产区咖啡熟豆的感官品质也存在一定差异。研究结果可为云南咖啡风味品质提升及对优质产品的筛选和鉴别具有重要意义。

关键词：咖啡豆云南风味成分感官品质

experimental and numerical studies of micro PeM fuel cell

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Acta Mechanica Sinica 2011年第5期27卷 627-635页

作者： Rong-gui Peng Chen-Chung Chung Chiun-Hsun Chen Department of Mechanical engineering National Chiao Tung UniversityHsinchu Taiwan China

A single micro proton exchange membrane fuel cell （PeMFC） has been produced using Micro-electromechanical systems （MeMS） technology with the active area of 2.5 cm 2 and channel depth of about 500 μ m.A theoretical analysis is performed in this study for a novel MeMS-based design of a micro *** model consists of the conservation equations of mass,momentum,species and electric current in a fully integrated finite-volume solver using the CFD-ACe＋ commercial *** polarization curves of simulation are well correlated with experimental ***-dimensional simulations are carried out to treat prediction and analysis of micro PeMFC temperature,current density and water distributions in two different fuel flow rates （15 cm 3 /min and 40 cm 3 /min）.Simulation results show that temperature distribution within the micro PeMFC is affected by water distribution in the membrane and indicate that low and uniform temperature distribution in the membrane at low fuel flow rates leads to increased membrane water distribution and obtains superior micro PeMFC current density distribution under 0.4 V operating *** predictions are well within those known for experimental mechanism phenomena.

关键词： Micro PeMFC · MeMS · Simulation · Fuel flow rate

Stability of mine ventilation system based on multiple regression analysis

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Mining Science and Technology 2009年第4期19卷 463-466页

作者： JIA Ting-gui LIU Jian School of Safety Science ＆ engineering Liaoning Technical University Fuxin Liaoning 123000 China

In order to overcome the disadvantages of diagonal connection structures that are complex and for which it is difficult to derive the discriminant of the airflow directions of airways, we have applied a multiple regression method to analyze the effect, of changing the rules of mine airflows, on the stability of a mine ventilation system. The amount of air （ Qj ） is determined for the major airway and an optimum regression equation was derived for Qi as a function of the independent variable （ Ri ）, i.e., the venti- lation resistance between different airways. Therefore, corresponding countermeasures are proposed according to the changes in airflows. The calculated results agree very well with our practical situation, indicating that multiple regression analysis is simple, quick and practical and is therefore an effective method to analyze the stability of mine ventilation systems.

关键词： ventilation network stability diagonal connection, multiple regression analysis

Prognostic significance of the preoperative hemoglobin to albumin ratio for the short-term survival of gastric cancer patients

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World Journal of Gastrointestinal Surgery 2022年第6期14卷 580-593页

作者： Ce-gui Hu Bai-e Hu Jin-Feng Zhu Zheng-Ming Zhu Chao Huang Department of Gastrointestinal Surgery The Second Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina

BACKGROUND Hemoglobin and albumin are associated with the prognosis of gastric cancer(GC)patients. However, the prognostic value of the hemoglobin to albumin ratio(HAR) for the short-term survival of GC patients with D2 radical resection has not been *** To investigate the significance of the HAR in evaluating the short-term survival of GC patients after D2 radical resection and to construct a nomogram to predict the prognosis in GC patients after surgery, thus providing a reference for the development of postoperative individualized treatment and follow-up *** Cox regression and Kaplan-Meier analysis was used for prognostic *** regression was used to analyze the relationships between HAR and the clinicopathological characteristics of the GC patients. A prognostic nomogram model for the short-term survival of GC patients was constructed by R *** HAR was an independent risk factor for the short-term survival of GC *** patients with a low HAR had a poor prognosis(P markedly related to high stage [odds ratio(OR) = 0.45 for Ⅱ vs Ⅰ;OR = 0.48 for Ⅲ vs Ⅰ], T classification(OR = 0.52 for T4 vs T1) and large tumor size(OR = 0.51 for ≥4 cm vs e nomogram model was based on HAR, age,CA19-9, CA125 and stage, and the C-index was *** Preoperative low HAR was associated with short-term survival in GC *** prognostic nomogram model can accurately predict the short-term survival of GC patients with D2 radical resection.

关键词： Gastric cancer Hemoglobin to albumin ratio Short-term survival Prognosis Nomogram

Cloning, expression and Purification of Wheat Acetyl-CoA Carboxylases CT Domain in e. coil

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Chemical Research in Chinese Universities 2008年第6期24卷 752-755页

作者： WANG Rui-jian YANG Xue-ying ZHeNG Liang-yu YANG Ye GAO gui CAO Shu-gui Key Laboratory for Molecular enzymology and engineering of Ministry of education Jilin University Changchun 130021 P. R. China College of Forestry Beihua University Jilin 132013 P. R. China

The entire gene of carboxyltransferase（CT） domain of acetyl-CoA carboxylase（ACCase） from Chinese Spring wheat（CSW） plastid was cloned firstly, and the 2.3 kb gene was inserted into PeT28a^＋ vector and expressed in e. coil in a soluble state. The （His）6 fusion protein was identified by SDS-PAGe and Western blot. The recombinant protein was purified by affinity chromatography, and the calculated molecular mass（Mr） was 88000. The results of the sequence analysis indicate that the cloned gene（GeneBank accession No. eU124675） was a supplement and revision of the reported ACCase CT partial cDNA from Chinese Spring wheat plastid. The recombinant protein will be significant for us to investigate the recognizing mechanism between ACCase and herbicides, and further to screen new herbicides.

关键词： Chinese Spring wheat Acetyl-CoA carboxylase Carboxyltransferase(CT) domain Cloning expression Purification

Dependence of e ≥ 100 MeV protons on the associated flares and CMes

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Research in Astronomy and Astrophysics 2017年第7期17卷 99-108页

作者： gui-Ming Le Chuan Li Xue-Feng Zhang Key Laboratory of Space Weather National Center for Space WeatherChina Meteorological Administration School of Computer Science Anhui University of Technology School of Astronomy and Space Science Nanjing University

To investigate the possible solar source of high-energy protons, correlation coefficients between the peak intensities of e ≥ 100 MeV protons, I100, and the peak flux and fluence of solar soft X-ray（SXR） emission, and coronal mass ejection（CMe） linear speed in the three longitudinal areas W0-W39, W40-W70 and W71-W90 have been calculated respectively. Classical correlation analysis shows that the correlation coefficients between CMe speeds and I100 in the three longitudinal areas are0.28±0.21, 0.35±0.21 and 0.04±0.30 respectively. The classical correlation coefficients between I100 and SXR peak flux in the three longitudinal areas are 0.48±0.17, 0.72±0.13 and 0.02±0.30 respectively, while the correlation coefficients between I100 and SXR fluence in the three longitudinal areas are 0.25±0.21, 0.84±0.07 and 0.10±0.30 respectively. Partial correlation analysis shows that for solar proton events with source location in the well connected region（W40-W70）, only SXR fluence can significantly affect the peak intensity of e ≥ 100 MeV protons, but SXR peak flux has little influence on the peak intensities of e ≥ 100 MeV protons; moreover, CMe speed has no influence on the peak intensities of e ≥ 100 MeV protons. We conclude that these findings provide statistical evidence that e ≥ 100 MeV protons may be mainly accelerated by concurrent flares.

关键词： Sun coronal mass ejections (CMes) --Sun flares - (Sun:) particle emission

血必净联合抗蛇毒血清治疗血液毒毒蛇咬伤的临床效果

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蛇志 2024年第3期36卷 281-284页

作者：蒋四海刘可轩肖桂娥李佳林邵阳市中心医院急诊科湖南邵阳422000 邵阳市中心医院感染科湖南邵阳422000

目的研究血必净联合抗蛇毒血清治疗血液毒毒蛇咬伤的临床效果。方法将我院收治的98例诊断为血液毒素毒蛇咬伤的患者随机分为对照组和联合治疗组,每组49例。对照组在常规治疗基础上给予抗蛇毒血清治疗,联合治疗组在常规基础上给予抗蛇毒... 详细信息

目的研究血必净联合抗蛇毒血清治疗血液毒毒蛇咬伤的临床效果。方法将我院收治的98例诊断为血液毒素毒蛇咬伤的患者随机分为对照组和联合治疗组,每组49例。对照组在常规治疗基础上给予抗蛇毒血清治疗,联合治疗组在常规基础上给予抗蛇毒血清联合血必净治疗。比较两组患者的肢体肿胀消退时间、外周血小板(PLT)计数、凝血酶原时间(PT)、活化部分凝血活酶时间(APTT)、国际标准化比值(INR)、血浆纤维蛋白原(FIB)、凝血酶时间(TT)、肌酐清除率(CCR)及住院时间。结果联合治疗组的肢体肿胀消退时间明显短于对照组,差异有统计学意义(P<0.05)。两组患者的PLT、PT、APTT、INR、FIB、TT及CCR比较,差异均有统计学意义(均P<0.05)。联合治疗组的住院时间明显短于对照组,差异有统计学意义(P<0.05)。结论血必净联合抗蛇毒血清治疗血液毒毒蛇咬伤效果显著,有助于减轻患者中毒症状,可改善凝血功能及肾功能,缩短患者住院时间,值得临床推广应用。

关键词：血必净抗蛇毒血清血液毒素毒蛇咬伤临床疗效

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肉桂醛纳米乳的制备及体内药动学评价

中国医药生物技术 2024年第1期19卷 30-36页

作者：常格牛霞李桂玲中国医学科学院北京协和医学院医药生物技术研究所制剂室北京100050

目的构建肉桂醛纳米乳(Cin-Ne),以提高肉桂醛(Cin)稳定性、溶解度以及口服生物利用度。方法将Cin同时作为药物和油相,以蓖麻油聚氧乙烯醚(eL-35)为乳化剂,构建Cin乳剂(Cin-e),稀释后得到具有抗稀释性的纳米递送系统——Cin-Ne,通过激... 详细信息

目的构建肉桂醛纳米乳(Cin-Ne),以提高肉桂醛(Cin)稳定性、溶解度以及口服生物利用度。方法将Cin同时作为药物和油相,以蓖麻油聚氧乙烯醚(eL-35)为乳化剂,构建Cin乳剂(Cin-e),稀释后得到具有抗稀释性的纳米递送系统——Cin-Ne,通过激光粒度仪对其粒径和PDI进行检测,采用UPLC对纳米乳中肉桂醛含量进行检测,以外观性状、粒径和含量为指标,考察长期放置的Cin-Ne的稳定性。此外,通过对SD大鼠进行口服灌胃给药,研究该纳米乳的口服吸收情况以及体内药动学特征。结果将Cin载入纳米乳中,显著提高了药物在水中的溶解度;Cin-e中Cin含量为90.9 mg/ml,其制备的Cin-Ne粒径较小且分布均匀,在水、模拟胃液和模拟肠液中具有抗稀释性;4℃下放置稳定性良好。SD大鼠口服灌胃给药的体内药动学结果表明,Cin-Ne生物利用度是Cin原料药的3倍,可见纳米乳显著改善了Cin的口服吸收。结论成功构建了无需额外加入其他油相、无需助乳化剂、处方精简、工艺简单的Cin纳米药物递送系统Cin-Ne,其稳定性、溶解度以及口服生物利用度显著优于Cin,为Cin的临床应用提供了有益的探索和启示。

关键词：肉桂醛纳米乳药物递送系统药代动力学