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Propranolol hydrochloride degradation using La@TiO_(2) functionalized with CMCD

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Journal of Rare Earths 2022年第4期40卷 579-585,I0003页

作者： Gustavo Lopes Colpani Vitor Follmann Santos Rubieli Carla Frezza zeferino Micheli Zanetti Josiane Maria Muneron de Mello Luciano Luiz Silva Natan Padoin Regina de Fatima Peralta Muniz Moreira Márcio Antônio Fiori Cíntia Soaresc Post-Graduate Program in Technology and Innovation Management Community University of ChapecóRegionChapecó89809-900Brazil Department of Chemical Engineering Community University of ChapecóRegionChapecó89809-900Brazil Laboratory of Materials and Scientific Computing(LabMAC) Department of Chemical and Food EngineeringFederal University of Santa CatarinaFlorianópolis88040-900Brazil

Propranolol hydrochloride can be considered a persistent and bioaccumulative pharmaceutical in the *** drug and its by-products are potentially toxic and have adverse effects,since these compounds have been associated with endocrine-disrupting effects,reproductive deficiencies,embryo abnormalities and pericardial ***_(2)–La 0.05%–carboxymethyl-β-cyclodextrin(CMCD)nanoparticles were successfully prepared by a simple two-step method,which consists of sonification and *** characterization analyses reveal that lanthanum is dispersed on the semiconductor surface,probably forming Ti–O–La bonds,which can induce oxygen vacancies and surface defects that effectively restrain the recombination of photogenerated electron/holes *** efficiency of TiO_(2)–La 0.05%–CMCD samples in degradation of propranolol under UV-light irradiation is higher than that of pristine TiO_(2) within 20 min reaction,probably due to complex formation between theβ-blocker and the oligosaccharide,which allows us to propose a photocatalytic mechanism based on the formation of intermediates and competition of these compounds to the radicals and CMCD cavities.

关键词： TiO_(2) Lanthanum CMCD Propranolol Photocatalysis Functionalization

The Use of Sweet Sorghum as a Feedstock for Ethanol Production

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American Journal of Plant Sciences 2014年第21期5卷 3340-3344页

作者： Lincoln Villi Gerke Gabriela Lionco zeferino Armin Feiden Mestrado em Engenharia de Energia na Agricultura Universidade Estadual do Oeste do ParanáCascavelBrazil

The sweet sorghum is investigated as an alternative source in place of sugar cane for ethanol production. Its mass can be processed with the same machinery used in the processing of sugar cane, also offering a quantity of biomass (bagasse) similar in volume to the operation. The results obtained in the experiment showed that sweet sorghum cultivar Sugargraze produces ethanol lower than cane sugar ratio. The sugar content in this variety did not show the expected values in the first cut, which resulted in a short amount of ethanol, 740 liters per hectare. The material reached 3.7 meters and suffered no lodging, being easy to handle and cut with common shredder, same equipment used in the processing of corn. The conclusion of the study pointed to the viability of producing ethanol from sweet sorghum in commercial larger scales.

关键词： Ethanol Sweet Sorghum Sugar Cane

Degradation of Plastics in Seawater in Laboratory

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Open Journal of Polymer Chemistry 2015年第4期5卷 55-62页

作者： Juan C. Alvarez-zeferino Margarita Beltrán-Villavicencio Alethia Vázquez-Morillas Universidad Autónoma Metropolitana Unidad Azcapotzalco San Pablo 180 Col. Reynosa Tamaulipas Del. Azcapotzalco México City México Sociedad Mexicana de Ciencia y Tecnología Aplicada a Residuos Sólidos A.C. Mexico City México

Degradable plastics are used as a way to decrease the environmental impact of these materials when they become waste. However, they can reach natural ecosystems due to littering and bad management. This research assesses the performance of oxodegradable and compostable plastics on marine environments through a respirometric lab test. Probes of the plastics, with and without previous simulated weathering, were put in contact for 48 days with a marine inoculum, in a system that guarantees continuous aeration and capture of the produced CO2. After the test, the samples were also assessed in terms of their loss of mechanical properties. The compostable plastic exhibited the higher degree of mineralization (10%), while there was no difference between the polyolefins (2.06% - 2.78%), with or without presence of pro-oxidants or previous abiotic degradation. On the other hand, exposition to UV light promoted a higher loss of elongation at break in the oxodegradables plastic (>68%). The results show that the studied plastics achieve very low biodegradation rates while presenting a higher rate of loss of physical integrity. This combination of phenomena could lead to their fragmentation before significant biodegradation can occur. The risk of microplastics formation must be prevented by avoiding the presence of the materials in marine environments, even if they have shown suitability for some waste management scenarios.

关键词： Mineralization Oxodegradable Marine Environment Polylactic Acid

Medical schools that received the PROMED (program for the encouragement of curricular changes in medical courses)—Preconditions and change process

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Health 2012年第5期4卷 279-284页

作者： Patricia Alves de Souza Marco Aurélio Da Ros Angélica Maria Bicudo zeferino Universidade do Vale do Itajaí (UNIVALI) Itajaí Brazil Universidade Estadual de Campinas (UNICAMP) Campinas

Since the Curriculum Guidelines (CG) which were created in 2001 and PROMED (Program for the Encouragement of Curricular Changes in Medical Courses), several schools have applied for this incentive. Medical Schools (MS) have faced important changes in their curriculum throughout the years. The purpose is to verify if medical schools that received PROMED already had a historical of curricular changes. Several interviews, which were carried out with PROMED coordinators, were recorded, transcribed and analyzed according to the Bardin’s content analysis technique. Later, these interviews were later categorized into nine themes. This paper analyses the Medical School History category which encompasses three subcategories: existence of a former changing history;need to overcome the model and changing period. It is highlighted that medical schools that received PROMED had a previous changing historical which was sometimes located in anti-hegemonic niches. It is noticeable, however, that such changes were not enough to affect the comprehension of healthillness process and its consequent results. PROMED was, effectively, the reference for medical schools implementing the C.G. which represents, now, a benchmarking for all new and old schools in the country.

关键词： Curriculum Guidelines Medical Schools

The Brazilian public healthcare system and its participation in medical training

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Health 2012年第8期4卷 500-505页

作者： Patricia Alves de Souza Marco Aurélio Da Ros Angélica Maria Bicudo zeferino Universidade do Vale do Itajaí Itajaí Brasil Universidade Estadual de Campinas Campinas Brasil

Introduction: In Brazil, in a joint initiative of the Ministries of Health and of Education and Culture, the Program for the Promotion of Changes in Medical School Curricula (PROMED) was created, in order to give financial support to medical schools for the development and implementation of curricular changes to the medicine courses. Objective: To ascertain the influence of PROMED on the interaction between the Brazilian public healthcare system (SUS) and the universities. Method: Using the qualitative method by way of content analysis of the Bardin, interviews with 19 coordinators of the medicine courses which received financial support from PROMED were carried out and analyzed. Results: Subcategories which express the current relation between SUS and the universities were found: the need to train SUS professionals and the teaching staff involved, the lines of research directed toward SUS and partnership relations as part of the student learning process, the strengthening of SUS and the internal problems. Conclusions: Observing the needs of the relationship between SUS and the curricular changes it was noted that the public health services are of extreme importance as part of the training process of the medical student. Besides favoring practice, it establishes student activities within the health services, the evaluation of the policies, planning and management of the health services in activities of training and social communication in healthcare, linked to community organizations or diverse social entities. Thus, problems associated with the healthcare service can be identified, as well as the health conditions and life style of the population.

关键词： Curricular Changes Medical Training Brazilian Healthcare System (SUS) PROMED

Cell-Phone Recycling by Solvolysis for Recovery of Metals

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Journal of Materials Science and Chemical Engineering 2015年第1期3卷 52-57页

作者： Lorena Eugenia Sánchez Cadena zeferino Gamino Arroyo Mario Alberto González Lara Q.Demetrio Quiroz Departamento de Ingeniería Civil Universidad de GuanajuatoDIAv.Juárez 77CP 36000GuanajuatoGto.México Departamento de Ingeniería Química Universidad de GuanajuatoDCNyENoria Alta s/nCP 36050GuanajuatoGto.México

Mobile phones represent a significant and growing problem with respect to electrical waste and electronic equipment (WEEE). Nevertheless, they are perhaps one of the most valuable electronic products, since they are an important resource for the recovery of metals in terms of mass and volume. In this research a chemical recycling of mobile phones by solvolysis was investigated. The processing was performed by comminution in a hammer mill followed by screening to obtain mesh-4 sized flakes. Flakes were subjected to solvolysis. Different reaction conditions were tested. A reaction time between 2 - 7 hours and a temperature between 150°C - 300°C were the optimum conditions to dissolve the polymer contained in mobile phones. Metals were separated by filtration. Chemical analyses (ATR FT-IR, UV) were carried out on the solvent and the mobile phone flakes before and after solvolysis. A SEM study was carried out, before and after solvolysis, but only to the mobile phone flakes. Thermal transitions of mobile phone flakes were determined by DSC. Chemical results showed that some aromatic species migrate from mobile phones flakes to the solvent, due to the solvolysis reaction. Thermal analysis showed that the Tg, (glass transition temperature) of mobile phone flakes after solvolysis was different to Tg of the polymer before solvolysis, this is due to chemical changes in the molecule. A comparative SEM study revealed that, after solvolysis, the polymer contained in mobile phone flakes is more elastomeric. After solvolysis, solvent was recovered by means of a rotatory evaporator, so that it can be used again. The results obtained in this research showed that solvolysis is an alternative for metal recovery from mobile phones.

关键词： Cell-Phones Solvolysis Recycling

Adsorption of 5.5’-Disulfonicindigotin(5.5’-DI)onto Green Coconut Fiber(Cocos nucifera L.):Kinetic and Isotherms

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Journal of Encapsulation and Adsorption Sciences 2014年第2期4卷 37-52页

作者： Lívia F.zeferino Ivanise Gaubeur Maria E.V.Suárez-Iha Patricia A.M.Freitas Centro Universitário do Instituto Mauáde Tecnologia Escola de Engenharia MauáSao Caetano do SulBrazil Centro de Ciências Naturais e Humanas Universidade Federal do ABCSanto AndréBrazil Escola de Engenharia Universidade Presbiteriana MackenzieSao PauloBrazil

Green coconut fiber (Cocos nucifera L.) has been largely used in solid-phase extraction. The effect of the initial dye concentration (1.91, 3.02 and 4.02) × 10-5 mol·L-1 and solid phase contact (SPE) time were evaluated at different temperatures (283, 298 and 313) K at pH 2. Kinetic experimental data were applied to three simplified kinetic models: pseudo-first order, pseudo-second order, and intraparticle diffusion. The adsorption of 5.5’-DI onto the solid phase showed excellent fit to the pseudo-second order model. At 283, 298 and 313 K the maximum sorption, qmax,exp, for the lowest initial concentration (Co = 1.91 × 10-5 mol·L-1) of 5.5’-DI were (5.01, 5.24 and 6.14) × 10-4 g·g-1;for Co = 3.02 × 10-5 mol·L-1 (0.93, 1.01 and 1.03) × 10-3

关键词： 5.5’-Disulfonicindigotin Green Coconut Isotherm and Kinetic Modeling

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加尼福利亚州猪弓形体抗体的检查

湖北畜牧兽医 1980年第1期 45-47页

作者： zeferino Garcia 姜天童徐涤平

对加尼福利亚州20个郡(县)的891头猪进行了血清学检查。478头(54%)为阴性,153头(17%)呈非特异性反应,260头(29%)为血清学阳性。大部份猪(81%)血清的抗体效价较低,为1∶64～1∶128,少数猪(2%)的效价很高,在1∶1024以上。众所周知,弓形体... 详细信息

对加尼福利亚州20个郡(县)的891头猪进行了血清学检查。478头(54%)为阴性,153头(17%)呈非特异性反应,260头(29%)为血清学阳性。大部份猪(81%)血清的抗体效价较低,为1∶64～1∶128,少数猪(2%)的效价很高,在1∶1024以上。众所周知,弓形体能够引起各种动物发病。自1952年从猪分离出弓形体以来,中国、美国、日本、巴西、英国、德国、菲律滨和比利时等地都报导过猪弓形体病。根据康复猪的血清学检查结果显示,猪感染弓形体病是一个相当严重的问题。初生动物和出生三周龄的仔猪有可能被感染。本病常引起仔猪死亡。以前仅在分离到弓形体的地方报导过猪的损失,但是弓形体病却给牲猪生产造成危害。还可以经过被感染的肉食传染给人。本文对加尼福利亚州20个郡的猪进行了弓形体病的血清抗体阳性率的调查研究。

关键词：弓形体病牲猪阳性率弓浆虫病血孢子虫病血清抗体血清学检查利亚尼福

Silver Recovery from Spent Silver Oxide Button Cell by Liquid-Liquid Extraction

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Journal of Materials Science and Chemical Engineering 2015年第7期3卷 148-153页

作者： zeferino Gamino-Arroyo Antonio Tapia-Cisneros Osvaldo M.Zamacona-Saucedo Irene Cano-Rodríguez Alberto F.Aguilera-Alvarado Lorena E.Sánchez-Cadena Fernando I.Gómez-Castro Departamento de Ingeniería Química Universidad de Guanajuato Guanajuato México Departamento de Ingeniería Civil Universidad de Guanajuato Guanajuato México

Button cell batteries are used in clocks, thermometers, remote controls, toys and other devices, and they are usually discarded in the trash once its useful life is over. Some models of these batteries contain silver oxide. In this paper we propose liquid-liquid extraction as separation process to recover the metal. First, silver determination is performed in different models of these batteries and leaching with nitric acid is carried out. Affinity study is done between several commercial extractants for silver. The best performing extractant is the bis(2-ethylhexyl) dithiophosphoric acid (D2EHDTPA). Furthermore, a study of the extraction yields as a function of extractant concentration and time is performed. The distribution isotherm is determined;complex extracted in organic phase and stripping conditions have been identified. With the aim of obtaining industrial application, a number of steps for a countercurrent process were defined by the McCabe-Thiele method. Finally, a study was done in micropilot scale. The results show that it is possible to recover silver from this type of waste.

关键词： Silver Spent Button Cells Leaching Recovery