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Catalytic Conversion of High Density Polyethylene （HDPE） Polymer as a means of recovering valuable energy content from the plastic wastes

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Catalytic Conversion of High Density Polyethylene （HDPE） P...

热轧高强钢mAT3830两相区变形后不同速度冷却后的组织

2011 International Conference on Petroleum and Sustainable Development（ICPSD 2011）

作者： Almustapha, m. N. Andresen, j. m Energy and Sustainability Research Division Department of Chemical ＆ Environmental Engineering Faculty of Engineering University of Nottingham University Park Nottingham NG7 2RD UK

A catalytic degradation of High Density Polyethylene （HDPE） polymer was carried out in a fixed-bed reactor at 400℃using two sulfate modified Zirconium catalysts with aim of obtaining valuable and recyclable liquid products. The onset of degradation has moved from 420℃for HDPE alone to less than 300℃in the presence of the catalysts. The catalyst suppressed the bond energy, as low activation energy of 132.61 and 159.96 Kjmol -1 for CAT1 （7%SO 3 ） and CAT2 （3.5% SO 3 ） respectively, was observed. Further results from catalytic degradation shows how the catalysts improved the polymer degradation by achieving high conversion of about 99.8% with CAT1（7%SO 3 ） promoting high percentage of gaseous products（68%） of mainly aromatics and CAT2（3.5%SO 3 ） promoting high liquid products（about 53%） of mainly olefinic compounds. Generally, the carbon number distribution of the liquid products is within the gasoline range with composition of mainly aromatic and olefinic compounds with traces of naphthenic and aliphatic compounds which indicates the applicability of the products both as fuel and industrial raw material. Therefore, the method can be use as an alternative recycling method for converting plastic waste to more valuable energy sources.

关键词： HDPE polymer plastic wastes chemical recycling fixed-bed reactor.

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金属热处理 2013年第5期38卷 29-31页

作者：钟莉莉 j.S.Hinton W.m.Rainforth 鞍钢股份公司技术中心辽宁鞍山114009 英国谢菲尔德大学材料系

采用Servotest热模拟试验机,对热轧高强钢mAT3830进行了包括两相区(α+γ)变形、等温弛豫和冷却等系列模拟试验。利用光学显微镜、扫描电镜和EBSD分析研究了两相区变形后不同冷却速度对显微组织的影响。结果表明,在较低冷速(1℃/s)时,... 详细信息

采用Servotest热模拟试验机,对热轧高强钢mAT3830进行了包括两相区(α+γ)变形、等温弛豫和冷却等系列模拟试验。利用光学显微镜、扫描电镜和EBSD分析研究了两相区变形后不同冷却速度对显微组织的影响。结果表明,在较低冷速(1℃/s)时,显微组织由铁素体和珠光体组成,加速冷却(15℃/s)的试样在应变奥氏体的变形带上形成了针状铁素体,淬水(70℃/s)试样铁素体含量并不增加,但亚结构的形貌与相邻的铁素体晶粒不同。

关键词：高强钢板两相区变形冷却速度显微组织

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新南威尔士南部保持土壤的耕作制

水土保持应用技术 1985年第1期 36-43+62页

作者： j.m.Aveyard ,G.j.Hamilton ,l.j.Packer ,P.j.Barker ,李忠魁

本文根据现在通行的和将来可能产生的土地经营及耕种措施讨论新南威尔士南部实行的土壤保持耕作措施.首先提到在实行这种耕作制的田地上,对一个草田轮作的给定地点来说,决定土壤侵蚀强度的一个最重要因子是土地管理.我们通过研究新南威... 详细信息

本文根据现在通行的和将来可能产生的土地经营及耕种措施讨论新南威尔士南部实行的土壤保持耕作措施.首先提到在实行这种耕作制的田地上,对一个草田轮作的给定地点来说,决定土壤侵蚀强度的一个最重要因子是土地管理.我们通过研究新南威尔士南部的传统耕作制来说明土壤保持这个概念.由于传统耕作方法的安排常常与高强度暴雨的影响在时间上吻合,由此看来,与耕作相联系的主要侵蚀危害是经常发生的.有人提出在新南威尔士南部的任意一块可耕地管理策略中,土壤保持的最重要特征是与此有关的耕作量.这项工作的成效和缺点是与传统的土壤保持,土地管理措施,比如轮作中周期较长的牧草期,较短的休闲耕作地和等高耕作相联系的,在此将对这一点加以讨论.这一讨论强调了新的土壤保持土地管理措施的必要性.在目前可以采用的方法当中,我们在理论上主张,硬茬条播是控制侵蚀的最好方法,这一点将用Wagga Wagga研究中心的通行结果给以说明.但是,也有人指出在某些地方,排除耕作这一环节在农艺上是行不通的,因此,这些地方的耕作措施还需进一步研究.

关键词：土壤保持径流量土地硬茬少耕法草田轮作土壤流失量等高耕作耕作方法新南威尔士澳大利亚耕作制

Childhood Tuberculosis: A Descriptive Study in the Pediatric Ward of a University Hospital in Abidjan

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Open journal of Pediatrics 2020年第1期10卷 206-216页

作者： G. l. S. Couitchéré S. j. E. Enoh G. B. Aka l. Zaho l. Cissé Pediatric Department Treichville University Hospital Center Abidjan Cote d’Ivoire

Introduction:?Tuberculosis is one of the top ten causes of death in the world. Purpose:?The purpose of this study was to describe the different locations of tuberculosis and the diagnostic means used in our department. methods:?This was a descriptive retrospective study of children under 15 years of age admitted in 2018 for tuberculosis. The variables under study were socio-demographic, clinical, paraclinical and evolutionary data Results:?Forty-eight children were enrolled. The median age was 8.2 years (± 4.5) and the m/F ratio was 1.4. TB contamination was found?in 20.8% of cases and the index was often a family member (80%). The median diagnostic time was 49 (± 33) days. Six patients had positive HIV serology, 82% had acute malnutrition and lung examination was abnormal in the majority of cases (70.8%). Thorax-ray abnormalities were common (81%) and tuberculin skin testing was positive in 70.6% of cases. The diagnosis was confirmed in 29.2% of the children and the confirmatory examinations were direct examination (9 cases), lymph node biopsy (4?cases) and rapid test (Expert mTB/RIF) (one case). In 70.8% of cases, this was a diagnostic presumption. Pulmonary tuberculosis accounted for 72.9% of which 39.6% multifocal forms and extra-thoracic form 27.1%. Thirty-nine patients had received standard TB treatment and death occurred in 22.9% of cases. Conclusion:?Children are a high-risk population for TB, especially in cases of family infection. Contacts screening through a systematic approach to diagnosis will reduce deaths. Diagnostic difficulties can be partly overcome by improving the accessibility of rapid testing.

关键词： Tuberculosis Child Diagnosis

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用同位素稀释法研究土壤-植物系统镉的迁移

核农学报 1993年第2期7卷 110-116页

作者：吴启堂 j.l.morel A.Guckert 华南农业大学土化系 Phytotechnie ENSAIA 54505 Nancy France

本试验用^(109)Cd标记土壤,在盆栽试验条件下研究以水溶性盐和以污泥形式进入土壤的镉,以及土壤原有镉在土壤-植物系统的实际迁移率,并用同位素放射性比度比较的方法分析了0.1mCaCl_2、DTPA和0.1N HCl浸提镉与植物吸收镉的关系。结果表... 详细信息

本试验用^(109)Cd标记土壤,在盆栽试验条件下研究以水溶性盐和以污泥形式进入土壤的镉,以及土壤原有镉在土壤-植物系统的实际迁移率,并用同位素放射性比度比较的方法分析了0.1mCaCl_2、DTPA和0.1N HCl浸提镉与植物吸收镉的关系。结果表明,以水溶性镉盐处理的土壤,大大提高了黑麦草植株的镉浓度。在加镉处理的土壤中,植物主要吸收外加镉,外加镉向植物地上部的实际迁移率大子土壤原有的镉。以水溶性盐进入土壤的镉的迁移率。为污泥镉的2～3倍。0.1m CaCl_2浸提镉与植物吸收镉的放射性比度较为接近,0.1N HCl则浸提出了一部分植物难以吸收的镉。

关键词：同位素稀释法迁移率镉土壤植物

Better management of Adverse Events Favors Sorafenib Treatment of HCC Patients and Impact on Survival

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journal of Cancer Therapy 2016年第4期7卷 275-284页

作者： Regiane S. S. m. Alencar luciana Kikuchi Cláudia m. Tani Aline l. Chagas Cinira C. Camargo Túlio E. F. Pfiffer Paulo m. G. Hoff Flair j. Carrilho Sao Paulo Clínicas liver Cancer Group Instituto do Cancer do Estado de Sao Paulo (ICESP) Hospital das Clínicas Department of Gastroenterology University of Sao Paulo School of Medicine Sao Paulo Brazil medical Oncology Instituto do Cancer do Estado de Sao Paulo (ICESP) Sao Paulo Brazil

Introduction: Sorafenib is an orally active multikinase inhibitor approved for the treatment of advanced hepatocellular carcinoma (HCC) and is the only systemic treatment associated with a survival benefit in advanced stage. The aims of this study were to evaluate the tolerance and survival of sorafenib-treated patients, and to identify potential prognostic factors of survival. methods: A total of 88 HCC patients treated with sorafenib from june 2010 to january 2014 were retrospectively reviewed. Tumour stage, liver function and adverse events to sorafenib were analyzed. Univariate and multivariate analysis were carried out to identify predictors of survival in patients with advanced HCC treated with sorafenib. Results: There were 64 (73%) males included in this study, with a median age of 61.16 years. Eight (91%) patients had Child-Pugh class A cirrhosis. most patients were classified as BClC C (82%). Hepatitis C virus was the predominant cause of HCC (68%). Sorafenib was the initial treatment modality in 43%. median time of sorafenib therapy was 8.23 months. Overall survival in 1 year was 57.3% and 36.7% in 2 years. The median survival was 16.3 months. In the univariate analysis of the OS based on Child-Pugh score did not demonstrate a significant difference in our study (p = 0.62). The presence of dermatologic adverse event predicted a better overall survival in the multivariate analysis. Better survival was also observed in patients with AFP level ml in the start of sorafenib therapy (p = 0.001). Patients that used Sorafenib for ≥6 months had shown better outcome. None of the patients discontinued sorafenib because of adverse effects. Conclusions: Advanced HCC patients treated with sorafenib who experienced dermatologic adverse event and low AFP level ml showed better overall survival. As expected, longer sorafenib therapy (≥6 months) was associated to better survival. Even in the presence of adverse events, the use of sorafenib should be continu

关键词： management of Adverse Event Hepatocellular Carcinoma Sorafenib Therapy Predictors of Overall Survival Dermatologic Adverse Event

Improving high-temperature mechanical properties of cast CrFeCoNi high-entropy alloy by highly thermostable in-situ precipitated carbides

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journal of materials Science & Technology 2021年第13期72卷 29-38页

作者： X.W.liu N.Gao j.Zheng Y.Wu Y.Y.Zhao Q.Chen W.Zhou S.Z.Pu W.m.jiang Z.T.Fan State Key laboratory of materials Processing and Die&mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621999China State Key laboratory for Advanced metals and materials University of Science and Technology BeijingBeijing 100083China School of materials Engineering Purdue UniversityWest LafayetteIN 47907USA Southwest Technology and Engineering Research Institute Chongqing 400039China Center for Electron microscopy Wuhan UniversityWuhan 430072China

The Cr Fe Co Ni high-entropy alloy(HEA)exhibits excellent mechanical properties at lower temperatures due to its low stacking-fault energy,however,its medium-and high-temperature strengths are still *** consideration of the potential diversified applications,more strengthening approaches except for the previously proposed l12 phase hardening deserve further exploration due to its rapid coarsening tendency at high ***,we achieved significant high-temperature strengthening of the cast Cr Fe Co Ni HEA by in-situ precipitation of highly thermostable *** with 0.5 at.%and 1 at.%niobium and carbon were prepared by simple casting processes,*** cast,solute solution and aging.A highly thermostable microstructure was formed,which comprises very coarse grains accompanied with extensive thermostable carbide precipitates embedded,including submicrometer coherent Nb C particles in grain interiors and intergranular coherent m_(23)C_(6)*** high thermostability of microstructure,which is beneficial for the high-temperature loading,is ascribed to the synergy of lacking growth driving force and Zenner pinning effect by the *** properties tested at 673,873 and1073 K show that the yield strength and ultimate tensile strength are significantly increased by Nb/C doping,along with the elongation escalation at higher *** strengthening is mainly due to the precipitation hardening of carbide particles.

关键词： High-entropy alloy Carbides Precipitation High-temperature property Strengthening

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国际橡胶技术会议50年

合成橡胶工业 1990年第S1期13卷 2-6页

作者： j.m.Wright 周国楹 Consulant of Rubber and Plastics AUSTRAlIA

50年来国际橡胶会议难能可贵地记录了橡胶技术的进展、成就以及人们对它的认识。橡胶原材料供应者和橡胶机械生产者为此作出了出色的贡献。由革命性生产技术才获得的聚氨酯弹性体和聚氯酯泡沫材料,在1938年时,还未为人所知。

关键词：橡胶工业技术会议橡胶制品橡胶机械天然橡胶国际橡胶会议促进剂合成橡胶防老剂 1938年

Continuous-wave operation of 405 nm distributed Bragg reflector laser diodes based on GaN using 10th-order surface gratings

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Photonics Research 2022年第5期10卷 1157-1161页

作者： j.H.KANG H.WENZEl E.FREIER V.HOFFmANN j.FRICKE O.BROX m.mATAllA S.EINFElDT Ferdinand-Braun-Institut gGmbH Leibniz-Institut für Höchstfrequenztechnik12489 BerlinGermany

Single longitudinal mode continuous-wave operation of GaN-based distributed Bragg reflector(DBR) laser diodes with 10 th-order surface gratings is demonstrated. The DBR consists of periodic V-shaped grooves on a 2 μm wide ridge waveguide fabricated by using electron-beam lithography and plasma etching. The effect of different lengths of the DBR section and the gain section on the device performance has been studied. Periodic mode hops to the adjacent longitudinal Fabry–Perot resonator mode at shorter wavelength have been observed when increasing the operation current. Between the mode hops, single longitudinal mode emission at around 405 nm is achieved with a full width at half-maximum of 0.03 nm. A linear redshift of the emission wavelength with increasing temperature of 0.019 nm/K was derived.

关键词： diodes waveguide resonator