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Methodology for Precious Metal Recovery in Computer Printed Circuit

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Journal of Chemistry and Chemical Engineering 2013年第8期7卷 759-766页

作者： Miguel Aguilar Cortest Martha Lilia dominguez Patifio Antonio Rodriguez Martinez Rene Guardian Tapia[ Rosa Maria Melgoza Aleman Engineering and Applied Science Postgraduate School University of A utonomous Morelos State Morelos 62209 Mexico Faculty of Chemical Sciences and Engineering University of 4utonomous Morelos State Morelos 62209 Mexico Engineering and Applied Sciences Research Centre University of A utonomous Morelos State Morelos 62209 Mexico

The life of electronic equipment is becoming increasingly shorter and its replacement always generates a quantity of waste increase, giving rise to a problem of environmental character and still needed new options of solid waste management that will contribute to global sustainable development. Parts of these waste are TCI （the card＇s printed circuit） which containing dangerous elements and turns them into a polluting material from the soil, water and air, being harmful to human health if there is to proper and responsible way, so the recycling of TCI to obtain precious metals is an example of industrial materials that can be recycled. Despite this, large quantities of these are not recycled and some others are not considered. The objective of this work is to present a systematic and ecological methodology for the recovery of valuable materials contained in parts of used in computers, circuit boards using a leaching process. The method determines a set of variables to evaluate the kinetics of the reaction and the leaching of metals that form the substrate of metal and to establish the parameters that affect the rate of leaching of metals through a sensitivity analysis, to identify design alternatives. It determines the quantity and percentages that constitutes the motherboard, processor, video cards, accelerator graphics, network and memory cards RAM, among others and its content of metals such as Cu, Fe, Ag, Au and Pt.

关键词： Precious metals leaching waste electrical and electronic equipment printed circuit board.

Cryopreservation by Vitrification of Vitis vinifera cv. ＂Red Globe＂ Zygotic Embryos and Effect on the Expression of DNA Methyltransferase Genes

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Journal of Agricultural Science and Technology(B) 2016年第6期6卷 387-399页

作者： Heriberto Garcia-Coronado Maria-Elena Baez-Flores Rosalba Troncoso-Rojas Marisela Rivera-dominguez Martin-Emesto Tiznado-Hernandez Coordinacion de Tecnologia de Alimentos de Origen Vegetal Centro de Investigacion en Alimentacion y Desarrollo A.C. (CLAD)Hermosillo Sonora CP 83304 Mexico Facultad de Ciencias Quimico Biol6gicas Universidad Autonoma de Sinaloa Culiacan Sinaloa CP 80013 Mexico Coordinacion de Ciencia de los Alimentos Centro de Investigacion en Alimentacion y Desarrollo A.C. (CLAD) HermosilloSonora CP 83304 Mexico

Mexico is a large producer of table grape （Vitis vinifera L.） and therefore it is important to develop protocols to store the grape varieties germplasm. The objective of the present work was to design a protocol for the cryopreservation by vitrification of zygotic embryos of V. vinifera cv. ＂Red Globe＂ and evaluate possible epigenetics changes. The plant vitrification solution 2 （PVS2） was utilized before the utilization of liquid nitrogen （LN）. The effect of this protocol on embryo viability was tested by the triphenyl-tetrazolium chloride solution, as well as by the in vitro development of grape embryos into plantlet. A cDNA expression library of grape zygotic embryos was created to isolate expressed sequence tags of several DNA methyltrasferases. Gene expression of domains rearranged methyltransferase type 1 （DMR1） and DNA （cytosine-5）-methyltransferase 1 （MET1-2） isozymes was analyzed by quantitative reverse transcriptase PCR. The optimal conditions for vitrification were 10 min in 50% PVS2, followed by I0 min in 100% PVS2. Under these conditions, about 30% of plantlet was obtained from embryos after cryopreservation. It was recorded a reduction in the MET1-2 gene expression, which plays a role in the maintenance of DNA methylation. It is possible to cryopreserve viable grape zygotic embryos, although the treatment seems to induce alterations in the normal DNA methylation pattern of the zygotic embryo genome.

关键词： Vitis vinifera zygotic embryo cryopreservation vitrification DNA methyltransferase.

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绿色建筑新浪潮:净零建筑

低碳世界 2012年第10期2卷 32-33页

作者： Catherine dominguez 韩熔桓美国可再生能源网站***网站

绿色建筑的下一个浪潮正在到来,这就是“净零建筑”.顾名思义,这些建筑因为可以发电自给,所以每年的能耗都是零,碳排放量也是零.

关键词：绿色建筑能源印度投资者 LEED 南亚碳排放量

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Characterization by Thermogravimetric Analysis of Polymeric Concrete with High Density Polyethylene Mechanically Recycled

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Journal of Minerals and Materials Characterization and Engineering 2014年第4期2卷 259-263页

作者： Alma Delia Rodriguez Martinez Martha Lilia dominguez Patino Rosa Maria Melgoza Aleman Gerardo Antonio Rosas Trejo Graduate Engineering and Applied Science Autonomus University of the State of MorelosChamilpaMorelosMexico Faculty of Chemical Sciences and Engineering Autonomus University of the State of MorelosChamilpaMorelosMexico Metallurgical Research Institute University Michoacana de San Nicolas de HidalgoMoreliaMichoacanMexico

This paper presents the results of the characterization by thermogravimetric analysis of a new composite material called polymeric concrete. The polymeric concrete contains micro-particles obtained from High Density Poly-Ethylene (HDPE) mechanically recycled (post-consumer bottles);the official Mexican standard NMX-E-232-SCFI-1999 considers the HDPE as the recyclable plastic material. Thermo-grams based on weight lost were obtained from the raw material (HDPE) and the polymer concrete in order to obtain the glass transition temperature (Tg) and melting temperature (Tf). The analysis conditions were defined from 20°C to 180°C and the heat rate of 1°C/minute. The results show that the glass transition temperature of polymeric concrete is 46°C and the HDPE is 38°C. These results mean that the polymeric concrete is more resistant to decomposition. With respect to the melting temperature, the results show that the 2°C difference between polymeric concrete and HDPE is not significant. The polymeric concrete with HDPE recycled can be considered as composite material thermoplastic. The new material melts when it is heated to 146°C and has the ability to be softened, processed and reprocessed with temperature and pressure changes, which make it possible to obtain molded pieces in the desired shape.

关键词： Polymer Concrete High Density Poly-Ethylene Thermogravimetric Analysis

Laser trimming of the operating wavelength of silicon nitride racetrack resonators

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Photonics Research 2020年第5期8卷 677-683页

作者： GRETA DE PAOLI SENTA L.JANTZEN THALIA dominguez BUCIO ILIAS SKANDALOS CHRISTOPHER HOLMES PETER G.R.SMITH MILAN M.MILOSEVIC FREDERIC Y.GARDES Department of Information Engineering Universitàdegli Studi di PadovaVia Giovanni Gradenigo 635131 PadovaItaly Optoelectronics Research Centre University of SouthamptonSouthampton S0171BJUK

We demonstrate the possibility of post-fabrication trimming of the response of nitrogen-rich silicon nitride racetrack resonators by using an ultraviolet *** results revealed the possibility to efficiently tune the operating wavelength of fabricated racetrack resonators to any point within the full free spectral *** process is much faster than similar,previously presented methods(in the order of seconds,compared to hours).This technique can also be applied to accurately trim the optical performance of any other silicon photonic device based on nitrogen-rich silicon nitride.

关键词： trimming track faster

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某些两性表面活性剂抑制烷基硫酸盐刺激性的效应

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日用化学品科学 1982年第4期 5-10页

作者： J.GARCIA dominguez 朱震和

本文研究了烷基硫酸盐和烷基胺基甜菜碱(以下简称AABet)混合物与一种角质物,如人的胼胝(老茧)的相互作用。阴离子与两性表面活性剂之间形成的混合结构的类型以及它们同角质物的相互作用取决于一系列参数如pH、温度、浓度、浴比(蛋白质:... 详细信息

本文研究了烷基硫酸盐和烷基胺基甜菜碱(以下简称AABet)混合物与一种角质物,如人的胼胝(老茧)的相互作用。阴离子与两性表面活性剂之间形成的混合结构的类型以及它们同角质物的相互作用取决于一系列参数如pH、温度、浓度、浴比(蛋白质:表面活性剂溶液)等。其中,最关

关键词：表面活性剂混合胶束水泥外加剂 SLS 胶束结构烷基取代基硫酸盐硫化合物刺激性

Efficacy and safety of oral solution dosed misoprostol versus misoprostol vaginally in labour induction

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Open Journal of Obstetrics and Gynecology 2013年第9期3卷 673-679页

作者： Longinos Aceituno Velasco María Teresa Sánchez Barroso María Huertas Segura García Valois González Acosta Ramón de la Fuente Pedrosa Ana Barqueros Ramírez Luis Delgado Martínez encarna Ruiz Martínez Gynaecologic Clinic Management Unit Hospital “La Inmaculada” (Huercal-Overa) Healthcare Management Area North of Almeria Andalusian Health Service Andalusian Spain

Background: Labour induction is one of the most common medical procedures in obstetrics. The aim is to end the pregnancy when continuity is a risk to mother or fetus. Its main side effect is the increase in the cesarean rate, compared to spontaneous onset deliveries. On the other hand, mortality and morbidity in cesareans are higher. The most common pharmacological drugs used for induction are prostaglandins: dinoprostone and misoprostol. The “gold standard” for labour induction is vaginal misoprostol. The oral route is also effective and also has several benefits like faster onset and easear administration. In recent years several publications state that the administration of misoprostol oral solution, given in doses gradually, is associated with a lower cesarean and hyperstimulation rate than the cases where vaginal misoprostol has been used in pregnant women with unripe cervix. Furthermore, being its half life shorter, it may be very useful in case of uterine hyperstimulation and, probably, a high percentage of women prefer this oral administration to the vaginal one. The objective of this study is to compare the efficacy, safety and side effects on mother and fetus on use of oral versus vaginal administration for induction of labour for prolonged gestation (41 weeks) and premature rupture of membranes, both with live fetus. Methods/Design: Design: double blind controlled trial. Study population: Pregnant women whose labour will be induced due to premature rupture of membranes or prolonged gestation. Inclusion Criteria: 1) Bishop Test equal to or less than 7;2) Single pregnancy;3) Pregnancy at term (37 - 42 weeks);4) No history of uterine surgery;5) Cephalic presentation;6) Live fetus;7) No prostaglandins contraindications. Discussion: Nowadays induction rates are very high, ranging from 25% to 30% approximately. In these cases caesarean rates are higher than when the delivery starts spontaneously. That is one of the main reasons why caesareans have increased, ma

关键词： Cervical Ripening Labour Induction Misoprostol Administration Oral Intravaginal Oxytocin Dinoprostone Pregnancy Prolonged Fetal Membranes Premature Rupture

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陶瓷的钨金属化

真空电子技术 1967年第1期 48-49+10页

作者： P.F.Varadi Ramon dominguez

实验测定了钨金属化陶瓷的封接特性。纯钨粉成功地用于金属化94％氧化铝瓷。获得的平均封接强度为12000磅/吋2。对金属化层进行了分析,发现钨没有扩散到陶瓷中去。陶瓷-金属封接最常采用烧结金属粉末法。此工艺所用的金属化配方之主要... 详细信息

实验测定了钨金属化陶瓷的封接特性。纯钨粉成功地用于金属化94％氧化铝瓷。获得的平均封接强度为12000磅/吋2。对金属化层进行了分析,发现钨没有扩散到陶瓷中去。陶瓷-金属封接最常采用烧结金属粉末法。此工艺所用的金属化配方之主要成份是钼和一些为增加封接强度而用的种种附加物,这些附加物我们都熟悉,常用金属氧化物来代替其纯金属。除某些临界条件应用外,如果涂层厚度和密度能保持各片都均匀,则用这些金属化混合物会得到良好的效果。而在某些条件下,钼-锰或钼-钛金属化的性能反而不利。虽然所用的钼本身并不向陶瓷扩散,但共它成分如锰,

关键词：金属化层氧化铝瓷氧化物陶瓷

Hepatocellular Carcinoma: The Final Moments of Life

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Journal of Cancer Therapy 2013年第2期4卷 377-383页

作者： Rodrigo Martins Abreu Camila Silva Ferreira Paulo dominguez Nasser Luciana Oba Onishi Kikuchi Flair José Carrilho Suzane Kioko Ono Department of Gastroenterology Clinical Division Hepatology Branch University of Sao Paulo School of Medicine Sao Paulo Brazil

Hepatocellular carcinoma (HCC) is a wide world prevalent hepatic disease, being the third greater cancer related death cause and most of the patients are not eligible for liver transplant. Palliative care is an option for, in average, half of hepatocellular carcinoma diagnosed patients and only recently the molecular targeted drug, Sorafenib, has been introduced among the therapeutic options for these patients. The physical pain comes frequently associated with progression disease (metastasis). Patients may be very fragile, with immobility, loss of interest in food and beverage intake, as well as weakness and drowsiness. Therefore, it is important that health professionals start planning care with patients and their relatives, before the end-stage disease. Informing the patient about therapeutic options guarantee a doctor patient relationship improvement and more belief on the health team.

关键词： Hepatocellular Carcinoma Liver Cancer Palliative Care Terminally Ill Death