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Nano-multilayered ZrN‒Ag/Mo‒S‒N film design for stable anti-frictional performance at a wide range of temperatures

Friction 2024年第12期12卷 2826-2837页

作者： Hongbo JU Jing LUAN Junhua XU Albano CAVALEIRO manuel evaristo Filipe FERNANDES School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Department of Mechanical Engineering CEMMPREARISEUniversity of CoimbraRua Luís Reis SantosCoimbra 3030-788Portugal TINT-Laboratory for Tribology and Interface Nanotechnology Faculty of Mechanical EngineeringUniversity of LjubljanaAškerčeva 6Ljubljana 1000Slovenia CIDEM ISEP-Polytechnic of PortoRua Dr.António Bernardino de AlmeidaPorto 4249-015Portugal

A multilayer film,composed by ZrN‒Ag(20 nm)and Mo‒S‒N(10 nm)layers,combining the intrinsic lubricant characteristics of each layer was deposited using DC magnetron sputtering system,to promote lubrication in a wide-range of *** results showed that the ZrN‒Ag/Mo‒S‒N multilayer film exhibited a sharp interface between the different layers.A face-centered cubic(fcc)dual-phases of ZrN and Ag co-existed in the ZrN‒Ag layers,whilst the Mo‒S‒N layers displayed a mixture of hexagonal close-packed MoS_(2)(hcp-MoS_(2))nano-particles and an amorphous *** multilayer film exhibited excellent room temperature(RT)triblogical behavior,as compared to the individual monolayer film,due to the combination of a relative high hardness with the low friction properties of both *** reorientation of MoS_(2)parallel to the sliding direction also contributed to the enhanced anti-frictional performance at *** 400℃,the reorientation of MoS_(2)as well as the formation of MoO_(3)phase were responsible for the lubrication,whilst the hard t-ZrO_(2)phase promoted abrasion and,consequently,led to increasing wear *** 600℃,the Ag_(2)MoO_(4)double-metal oxide was the responsible for the low friction and wear-resistance;furthermore,the observed transformation from t-ZrO_(2)to m-ZrO_(2),could also have contributed to the better tribological performance.

关键词： DC magnetron sputtering ZrN‒Ag/Mo‒S‒N multilayer film tribological properties tribo-phases

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Ethical Issues and Politics in Research for Sustainable Resource Management in Tanzania

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Cultural and Religious Studies 2015年第3期3卷 125-134页

作者： evaristo Haulle University of Dares Salaam Dares Salaam Tanzania

Understanding Research ethics is the key for producing sound findings to guide management of resource in any community. Through in-depth interview, observation and documentary search, it was noted that most of the studies are not self-driven and lack ethical integrity. People are hired to produce report without clear and streamlined methodology. Nature of the community and the way it is organised poses challenge in acquiring information. In principle, culture of the people to expression is an important aspect in getting liable findings. The conflicts over resources in Namawala and Magaiduru villages have led to the loss of trust and rejects on researchers as they are discovered to provide villagers with false information. Some findings are fabricated to convince the donors＇ interests to call for more funds for personal interests. Other decision makers would commission researcher to produce false data to suit their interests. This causes academic and researchers being classified as a tool of politician to pacify the public in order to maintain the status quo. The problem is caused by lack of sufficient research fund and understanding on the research essence, and importance of ethical consideration for good research. The situation causes multiple sided effects in the community. Generally, lack of research ethics and presence of greed politicians jeopardise resource management, peace and security. There is need to build the culture of truth and integrity for community development. Research methods need to be taught rigorously in order to build capacity in tools and principles.

关键词： research ethics politics sustainable development

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Heavy Metal Contaminated Food Crops Irrigated with Wastewater in Peri Urban Areas, Zambia

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Open Journal of Metal 2013年第2期3卷 77-88页

作者： evaristo Mwaba Kapungwe Geography Department University of Zambia Lusaka Zambia

Studies on peri urban farming in Zambia have not adequately tackled the issues pertaining to heavy metal contaminated wastewater irrigation farming. The study investigated heavy metal contamination of water, soils and crops at two peri urban areas in Zambia. Two study sites were New Farm Extension in Mufulira Town in the Copperbelt Province and Chilumba Gardens in Kafue Town in Lusaka Province. The heavy metals investigated were lead, copper, cobalt, nickel and chromium. These heavy metals were found to be higher than acceptable limits in wastewater used to irrigate crops and there are potential human health risks associated with consumption of heavy metal contaminated food crops which have implications on the livelihoods of people. Samples of water, soil and crops were collected and analysed for lead (Pb), copper (Cu), chromium (Cr), cobalt (Co) and nickel (Ni) using the Atomic Absorption Spectrometer (AAS). The data on heavy metals was analysed using mean, standard error and T-test. The results indicated that the levels of heavy metals in wastewater, soil and food crops were above acceptable limits at two study sites. It can be concluded that there was heavy metal contamination of wastewater, soil and food crops at the two peri-urban areas in Zambia. The study highlighted the actual levels of heavy metal contaminant uptake in food crops consumed by the peri urban population. The information from this study can be used by the relevant authorities to develop appropriate measures for monitoring and control of heavy metal contamination in wastewater irrigation farming systems in peri urban areas inZambia.

关键词： Heavy Metal Contamination Wastewater Soils Food Crops Irrigation Farming Peri Urban Areas Zambia

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Underestimation of chronic renal dysfunction after liver transplantation: ICEBERG study

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World Journal of Transplantation 2015年第1期5卷 26-33页

作者： evaristo Varo Rafael Ba?ares Magda Guilera Liver Transplant Unit Hospital Clínico Universitario Santiago de Compostela 15706 Santiago de Compostela Spain Hepatology Unit Department of Gastroenterology Hospital General Universitario Gregorio Mara?ón 28007 Madrid Spain Medical Department Novartis Farmacéutica 08013 Barcelona Spain

AIM: To compare prevalence of chronic renal dysfunction(CRD) according to serum creatinine(sCr) vs estimated glomerular filtration rate(e GFR) among maintenance liver transplant ***: The ICEBERG study was an observational, retrospective, cross-sectional, and multicenter study. Consecutive adult patients(aged 18 years or older) with liver transplantation(LT) performed at least two years previously were recruited. Multi-organ transplant recipients were excluded. Chronic renal dysfunction was defined according to sCr based criteria in routine clinical practice(≥ 2 mg/d L) and eGFR using MDRD-4 equation(< 60 m L/min per 1.73 m2). Agreement between sCr definition and e GFR assessment was evaluated using the Kappa index. Cox regression analysis was applied to identify predictive factors for developing CRD after ***: A total of 402 patients were analyzed(71.6% males). Mean ± SD age at transplant was 52.4 ± 9.8 years. Alcoholic cirrhosis without hepatocellular carcinoma was the most common reason for LT(32.8%). Mean time since LT was 6.9 ± 3.9 years. Based on sCr assessment, 35.3% of patients(95%CI: 30.6-40.0) had CRD; 50.2%(95%CI: 45.3-55.1) according to e GFR. In 32.2% of cases, sCr assessment had underestimated CRD. Multivariate analysis showed the following factors associated with developing CRD: eGFR < 60 m L/min per 1.73 m2 at three months post-transplant [hazard ratio(HR) = 4.76; 95%CI: 2.78-8.33; P < 0.0001]; calcineurin inhibitor use(HR = 2.31; 95%CI: 1.05-5.07; P = 0.0371); male gender(HR = 1.98; 95%CI: 1.09-3.60; P = 0.0260); and ≥ 10 years post-transplantation(HR = 1.95; 95%CI: 1.08-3.54; P = 0.0279).CONCLUSION: Seven years after LT, CRD affected half our patients, which was underestimated by s Cr. An e GFR < 60 m L/min per 1.73 m2 three months post-LT was predictive of subsequent CRD.

关键词： Calcineurin inhibitor Glomerular filtration rate Chronic renal dysfunction Liver transplantation Prevalence

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Molecular Discrimination of Wild Philippine Paddy Straw Mushroom （ Volvariella volvacea）

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Journal of Life Sciences 2014年第1期8卷 27-34页

作者： evaristo A. Abella Geoff D. Robson Richard F. Preziosi Department of Biological Sciences College of Arts and Sciences Central Luzon State University Science City of Munoz Nueva Ecija 3120 Philippines Faculty of Life Sciences The University of Manchester United Kingdom Oxford Rd. M13 9PL UK

Genetic diversity study of wild Philippine paddy straw mushroom （Volvariella volvacea） was conducted to establish a germplasm collection accessible to volvariella producers in the Philippines. Forty one wild strains were collected from different geographical areas in Northern and Central Luzon region. Strains were differentiated using random amplified polymorphic DNA （RAPD）. A single 10-based primer was used to generate randomly amplified polymorphic DNA （RAPD） in V. volvacea and differences were noted in band size （bp） ranging from 1,800 bp to 550 bp. Principal component analysis （PCA） of the RAPD data revealed 4 groups from wild strains. One strain showed RAPD pattern with band appearance at 1,750, 950 and 750 bp; 3 strains at 1,800 and 750 bp; 8 strains at 1,500 and 550; and the most abundant group with 29 strains at 750 bp. With observed lack of heterogeneity among strains, it is recommended that more collections from the wild should be undertaken for more diverse germplasm collection. Moreover, it is suggested that RAPD can be used to delineate strains of V. volvacea with potential importance on genetic diversity conservation and breeding.

关键词： Volvariella volvacea genetic diversity random amplified polymorphic DNA (RAPD).

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Total and not bevacizumab-bound vascular endothelial growth factor as potential predictive factors to bevacizumab-based chemotherapy in colorectal cancer

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World Journal of Gastroenterology 2016年第27期22卷 6287-6295页

作者： Amalia Azzariti Letizia Porcelli Oronzo Brunetti Marzia Del Re Vito Longo Patrizia Nardulli Michele Signorile Jian-Ming Xu Angela Calabrese Anna Elisa Quatrale evaristo Maiello Vito Lorusso Nicola Silvestris Clinical and Preclinical Pharmacology Laboratory National Cancer Research Centre Istituto Tumori Giovanni Paolo II 70124 Bari Italy Medical Oncology Unit National Cancer Research Centre Istituto Tumori Giovanni Paolo II 70124 Bari Italy Clinical Pharmacology and Pharmacogenetics Unit Department of Clinical and Experimental Medicine University Hospital 56126 Pisa Italy Pharmacology Unit National Cancer Research Centre Istituto Tumori Giovanni Paolo II 70124 Bari Italy Department of Gastrointestinal Oncology Affiliated Hospital Cancer Center Academy of Military Medical Sciences Beijing 100071 China Radiology unit National Cancer Research Centre Istituto Tumori Giovanni Paolo II 70124 Bari Italy Medical Oncology Unit 'Casa Sollievo della Sofferenza' Hospital 71013 San Giovanni Rotondo Italy Medical Oncology Unit 'Mons R Dimiccoli' Hospital 76121 Barletta Italy

AIM: To identify suitable biomarkers of response to bevacizumab(BV)- it remains an open question. The measurement of serum vascular endothelial growth factor(VEGF) has been proposed as a predictive factor for this drug, even if literature data are contradictory. METHODS: We prospectively evaluated the role of BV, total and not BV-bound VEGF and angiopoietin-2(Ang-2) serum levels as potential predictive factors of response for BV in combination with an oxaliplatinbased chemotherapy. BV, Ang-2, total and not BVbound VEGF levels were measured at baseline, before 2^(nd) and 5^(th) cycle of oxaliplatin-based chemotherapy in 20 consecutive metastatic colorectal cancer patients. RESULTS: Results were correlated to response to treatment. Variability in BV levels have been found, with decreased level in less responding patients. In particular, the concentration of BV increased of 3.96 ± 0.69 folds in serum of responsive patients after 3 more cycles of therapy compared to those with stable or progressive disease with a 0.72 ± 0.25 and 2.10 ± 0.13 fold increase, respectively. The determination of free and total VEGF demonstrated that the ratio between the two values, evaluated immediately before the 2^(nd) and the 5^(th) cycle of therapy, decreased from 26.65% ± 1.33% to 15.50% ± 3.47% in responsive patients and from 53.41% ± 4.75 to 34.95% ± 2.88% in those with stable disease. Conversely, in those with progression of disease, the ratio showed the opposite behavior coming up from 25.99% ± 5.23% to 51.71% ± 5.28%. The Ang-2 levels did not show any relationship. CONCLUSION: Our data show that the ratio of not BV-bound VEGF to total VEGF serum and BV plasma concentrations for predicting the response to BV plus oxaliplatin-based chemotherapy could be a promising biomarker of response to BV.

关键词： Bevacizumab Vascular endothelial growth factor Angiopoietin 2 Metastatic colorectal cancer Biomarker Predictive factor

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赞比亚北部卡帕图地区古元古代花岗岩成因:岩石地球化学、锆石年代学及Hf同位素约束

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地质学报 2021年第4期95卷 999-1018页

作者：古阿雷王杰任军平左立波孙宏伟吴兴源邢仕刘子江张金达 EZEKIAH Chikambwe evaristo Kasumba 中国地质调查局天津地质调查中心中国天津300170 河北省地矿局第五地质大队中国唐山063000 赞比亚地质调查局赞比亚卢萨卡P.O.Box.50135

赞比亚北部地区广泛发育古元古代花岗岩,是研究班韦乌卢地块构造岩浆作用特征的天然实验室。本文对赞比亚北部卡帕图地区大面积出露的花岗岩体开展较系统的岩相学、岩石地球化学、锆石U-Pb年代学和Hf同位素研究。结果显示,卡帕图地区主... 详细信息

赞比亚北部地区广泛发育古元古代花岗岩,是研究班韦乌卢地块构造岩浆作用特征的天然实验室。本文对赞比亚北部卡帕图地区大面积出露的花岗岩体开展较系统的岩相学、岩石地球化学、锆石U-Pb年代学和Hf同位素研究。结果显示,卡帕图地区主体花岗岩形成于2012±11~1970±20Ma,晚期浅肉红色似斑状正长花岗岩侵位年龄为1959±16Ma,均为古元古代岩浆活动,大量太古宙捕获锆石信息显示班韦乌卢地块可能存在太古宙地壳组分残留。地球化学数据表明,卡帕图花岗岩具有高硅(SiO_(2)=67.93%~72.80%)、高铝(13.85%~14.91%)、富钾(Na_(2)O/K_(2)O=0.29~0.89)、低镁(0.38%~1.93%)、低磷(0.10%~0.23%)的特点,铝饱和指数A/CNK在1.04~1.19之间,CIPW刚玉标准分子指数大于1%(1.01%~2.51%);稀土元素分配模式整体右倾,其中主体花岗岩稀土含量较高(ΣREE=191.79×10^(-6)~294.25×10^(-6)),Eu负异常(δEu=0.26~0.53),晚期浅肉红色似斑状正长花岗岩稀土含量相对较低(ΣREE=48.58×10^(-6)~54.00×10^(-6)),Eu弱正异常(δEu=1.04~1.37);微量元素中,卡帕图花岗岩富集Rb、K等大离子亲石元素,亏损Ba、Sr和高场强元素Nb、Ta等,并具有较低的Cr(3.56×10^(-6)~65.6×10^(-6))、Co(1.99×10^(-6)~12.5×10^(-6))和Ni(2.16×10^(-6)~33.7×10^(-6))含量;以上特征表明研究区古元古代花岗岩属于S型花岗岩。Hf同位素结果表明,卡帕图花岗岩的εHf(t)值和二阶段模式年龄tDM2值分别介于-15.9~+4.7和2289~3596Ma,远大于其锆石的结晶年龄,指示岩浆源区成分的强不均一性,岩浆源区系太古宙-古元古代陆壳部分熔融产物,存在不同程度的地幔物质混入。此外,主体岩石较高的CaO/Na_(2)O和低的Rb/Sr比值,表明主体花岗岩原岩是由地壳砂质岩部分熔融而来;晚期浅肉红色似斑状花岗岩低的CaO/Na_(2)O和高的Rb/Sr比值,指示泥质岩源区熔融。综合区域和全球构造演化历史,本次研究认为卡帕图花岗岩形成于坦桑克拉通与班韦乌卢地块同碰撞的构造环境,该期岩浆活动可能是Columbia超大陆的碰撞造山事件在班韦乌卢地块的地质响应。

关键词：古元古代 S型花岗岩班韦乌卢地块卡帕图地区赞比亚北部

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赞比亚东北部班韦乌卢地块泛非期以来构造演化的裂变径迹约束

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地质学报 2021年第4期95卷 1072-1081页

作者：任军平王杰古阿雷孙宏伟左立波贺福清 CHIPILAUKA Mukofu ALPHET PHASKANI Dokowe EZEKIAH Chikambwe evaristo Kasumba 中国地质调查局天津地质调查中心中国天津300170 赞比亚地质调查局赞比亚卢萨卡P.O.Box 50135

本文利用锆石和磷灰石裂变径迹方法探讨了班韦乌卢地块泛非期以来的主要构造演化时间。为研究班韦乌卢地块的构造活动,本文从班韦乌卢地块中部卡帕图地区的沉积盖层姆波罗科索群的姆巴拉组、萨马组和卡布韦卢马组中采集多件新鲜的岩石样... 详细信息

本文利用锆石和磷灰石裂变径迹方法探讨了班韦乌卢地块泛非期以来的主要构造演化时间。为研究班韦乌卢地块的构造活动,本文从班韦乌卢地块中部卡帕图地区的沉积盖层姆波罗科索群的姆巴拉组、萨马组和卡布韦卢马组中采集多件新鲜的岩石样品,并获得5件锆石和2件磷灰石样品裂变径迹分析结果。5件锆石裂变径迹年龄介于575±35~380±22 Ma之间,其峰值年龄组为600~572 Ma和420~390 Ma。2件磷灰石裂变径迹年龄介于59±6~27±4 Ma之间,其峰值年龄组为99~80 Ma和19~11 Ma。它们的峰值年龄组分别对应的主要时代为新元古代的埃迪卡拉纪、早泥盆世、晚白垩世和中新世。对比区域上已有的年龄数据可知,南部非洲地区新元古代的埃迪卡拉纪、早泥盆世和晚白垩世的构造活动是一个区域性的构造事件,仅中新世(19~11 Ma)的构造活动在区域上的表现尚不明确。综合前人成果资料,自泛非构造运动以来,班韦乌卢地块至少经历600~572 Ma、488~441 Ma、420~390 Ma、375~293 Ma、99~80 Ma及19~11 Ma六个构造事件。班韦乌卢地块泛非期以来的构造演化研究程度很低,此次研究成果可为今后在该地区的深入研究提供重要参考。

关键词：裂变径迹年代学锆石和磷灰石卡帕图地区班韦乌卢地块赞比亚东北部

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赞比亚东北部陇都地区首次发现中元古代辉长岩:哥伦比亚超大陆裂解在班韦乌卢地块的响应

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地质通报 2022年第1期41卷 34-47页

作者：古阿雷任军平王杰左立波孙宏伟许康康陈靖 EZEKIAH Chikambwe evaristo Kasumba 中国地质调查局天津地质调查中心天津300170 中信建设有限责任公司北京100027 赞比亚地质调查局赞比亚卢萨卡POX.50135

赞比亚东北部陇都地区位于班韦乌卢地块中东部,区内首次发现中元古代基性岩浆侵入事件,对于了解班韦乌卢地块中元古代构造演化历史及哥伦比亚超大陆的重建具有重要意义。针对研究区的辉长岩进行了系统的岩相学、LA-MC-ICP-MS锆石U-Pb年... 详细信息

赞比亚东北部陇都地区位于班韦乌卢地块中东部,区内首次发现中元古代基性岩浆侵入事件,对于了解班韦乌卢地块中元古代构造演化历史及哥伦比亚超大陆的重建具有重要意义。针对研究区的辉长岩进行了系统的岩相学、LA-MC-ICP-MS锆石U-Pb年代学、岩石地球化学和锆石Hf同位素研究。结果表明,辉长岩锆石中17粒具有他形板柱状,内部结构呈条带状、面状等特征,Th/U值较高(0.13~1.58),显示基性岩浆锆石属性,^(207)Pb/^(206)Pb年龄加权平均值为1544±17 Ma,代表了辉长岩的侵位结晶年龄,即中元古代。辉长岩主量元素SiO_(2)含量介于49.99%~50.18%之间,MgO含量(2.69%~2.78%)和Mg^(#)值(24.88~25.70)较低,TFeO(14.47%~14.62%)和TiO_(2)含量(2.68%~2.76%)较高,属于高钛板内拉斑玄武岩系列岩石;微量元素特征显示:轻、重稀土元素分馏明显((La/Yb)_(N)=8.53~9.57),具弱的负Eu异常(0.82~0.86),大离子亲石元素(LILE)Rb、Ba、Pb等相对富集、Sr相对亏损,高场强元素(HFSE)Nb、Ta、Ti等相对亏损,具有大陆溢流玄武岩(CFB)亲缘性;锆石Hf同位素结果显示,辉长岩的原始岩浆起源于中元古代早期亏损地幔源区,形成于板内伸展拉张环境,结合全球构造演化历史,认为班韦乌卢地块应是古—中元古代哥伦比亚超大陆的组成部分,研究区中元古代辉长岩的形成可能与哥伦比亚超大陆的裂解有关。

关键词：中元古代辉长岩哥伦比亚超大陆裂解班韦乌卢地块陇都地区赞比亚东北部地质调查工程

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胸苷酸合成酶和拓扑异构酶-1及Ki-67对伊立替康联合5-氟脲嘧啶治疗晚期大肠癌的预测价值

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中华肿瘤杂志 2005年第5期27卷 312-315页

作者：徐建明朱步东 Mangia Anita Simone Gianni Montemurro Severino Giuliani Francesco Maiello evaristo Colucci Giuseppe Paradiso Angelo 军事医学科学院附属医院肿瘤中心北京大学临床肿瘤学院内科 70126 Bari Via Amendola 209National Cancer InstituteItaly

目的探讨胸苷酸合成酶(TS)、拓扑异构酶1(Topo1)和肿瘤增殖指标Ki67对伊立替康(CPT11)联合5氟脲嘧啶(5Fu)治疗晚期大肠癌患者的临床疗效和预后的预测价值。方法采用免疫组化方法检测了CPT11+5Fu一线治疗78例大肠癌患者的TS、Topo1和Ki6... 详细信息

目的探讨胸苷酸合成酶(TS)、拓扑异构酶1(Topo1)和肿瘤增殖指标Ki67对伊立替康(CPT11)联合5氟脲嘧啶(5Fu)治疗晚期大肠癌患者的临床疗效和预后的预测价值。方法采用免疫组化方法检测了CPT11+5Fu一线治疗78例大肠癌患者的TS、Topo1和Ki67的表达,并与化疗疗效和患者的临床预后进行了分析。结果各检测指标的表达水平与临床疗效之间无关,但是临床预后不同。其中,TS低表达患者表现明显长的肿瘤进展时间(TTP,P<0.05)和存活期(OS,P<0.05);Ki67低表达也预示长的OS(P<0.05)。与单个指标相比较,两个指标的联合也不能预测临床疗效,但是对预后的判断作用明显提高。TS低表达、Ki67低表达以及TS和Ki67均低表达患者的中位TTP分别为9,8和17个月(P=0.02);TS低表达、Topo1低表达以及TS和Topo1均低表达患者的中位TTP分别为9,9和13个月(P=0.03);而Topo1低表达、Ki67低表达、Ki67和Topo1均低表达患者的中位TTP分别为8,9和11个月(P=0.05)。其中任何两个指标均低表达肿瘤的TTP和OS均明显长于高表达者(P<0.05)。结论TS、Topo1和Ki67不能预测大肠癌患者CPT11+5Fu的疗效,但对其临床预后有一定的预测作用。其中任何两个指标的联合,比单一指标对患者预后的预测价值明显提高。

关键词：胸苷酸合成酶拓扑异构酶-l Ki-67 伊立替康 5-氟脲嘧啶结肠肿瘤直肠肿瘤

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