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Hydrometallurgical processing of chalcopyrite:A review of leaching techniques

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International Journal of Minerals,Metallurgy and Materials 2024年第12期31卷 2537-2555页

作者： Darwin Michell Cheje Machaca Amilton Barbosa Botelho Junior Thamyres cardoso de Carvalho Jorge Alberto soares Tenório Denise Crocce Romano Espinosa Department of Chemical Engineering University of Sao PauloSão PauloBrazil

Copper,an essential metal for the energy transition,is primarily obtained from chalcopyrite through hydrometallurgical and pyrometallurgical *** risks and harmful impacts of these processes pose significant concerns for environmental and human safety,highlighting the need for more efficient and eco-friendly hydrometallurgical *** review article emphasizes current pro-cesses such as oxidative leaching,bioleaching,and pressure leaching that have demonstrated efficiency in overcoming the complicated chalcopyrite *** leaching operates under benign conditions within the leaching media;nevertheless,the introduction of oxidizing agents provides benefits and ***,a non-aggressive method,has shown a gradual increase in copper extrac-tion efficiency and has been explored using both primary and secondary *** leaching,known for its effectiveness and se-lectivity in copper extraction,is becoming commercially more viable with increased research *** research also provides im-portant data for advancing future research in the field.

关键词： chalcopyrite leaching bioleaching ionic liquids chloride hydrogen peroxide

Molecular approaches for spinal cord injury treatment

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Neural Regeneration Research 2023年第1期18卷 23-30页

作者： Fernanda Martins de Almeida Suelen Adriani Marques Anne Caroline Rodrigues dos Santos Caio Andrade Prins Fellipe soares dos Santos cardoso Luiza dos Santos Heringer Henrique Rocha Mendonça Ana Maria Blanco Martinez Laboratório de Neurodegeneração e Reparo Programa de Pós-Graduação em Medicina:Anatomia PatológicaDepartamento de PatologiaFaculdade de MedicinaHospital Universitário Clementino Fraga FilhoCentro de Ciências da SaúdeUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil Instituto de Ciências Biomédicas Centro de Ciências da SaúdeUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil Instituto de Biologia Departamento de NeurobiologiaLaboratório de Regeneração Neural e FunçãoUFFRio de JaneiroBrazil Laboratório Integrado de Morfologia Instituto de Biodiversidade e Sustentabilidade NUPEMPrograma de Pós-graduação Multicêntrico em Ciências Fisiológicas-SBFisCentro Multidisciplinar UFRJ-MacaéUniversidade Federal do Rio de JaneiroMacaéBrazil

Injuries to the spinal cord result in permanent disabilities that limit daily life *** main reasons for these poor outcomes are the limited regenerative capacity of central neurons and the inhibitory milieu that is established upon traumatic *** decades of research,there is still no efficient treatment for spinal cord *** strategies are tested in preclinical studies that focus on ameliorating the functional outcomes after spinal cord *** these,molecular compounds are currently being used for neurological recovery,with promising *** molecules target the axon collapsed growth cone,the inhibitory microenvironment,the survival of neurons and glial cells,and the re-establishment of lost *** this review we focused on molecules that are being used,either in preclinical or clinical studies,to treat spinal cord injuries,such as drugs,growth and neurotrophic factors,enzymes,and *** mechanisms of action of these molecules are discussed,considering traumatic spinal cord injury in rodents and humans.

关键词： axonal regeneration drugs enzymes growth factors molecular therapy neurotrophic factors purines spinal cord injury

Association between Helicobacterpylori, Epstein-Barr virus, human papillomavirus and gastric adenocarcinomas

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World Journal of Gastroenterology 2018年第43期24卷 4928-4938页

作者： Carolina Rosal Teixeira de Souza Marcelli Carolini Alves Almeida Andre Salim Khayat Emerson Lucena da Silva paul. cardoso soares Luiz Claudio Chaves Rommel Mario Rodriguez Burbano Laboratory of Human Cytogenetics Institute of Biological Sciences Federal University of Para Belem Para 66075-110 Brazil Oncology Research Center Federal University of Para Joao deBarros Barreto University Hospital Belem Para 66073-000Brazil Ophir Loyola Hospital Belem Para 66060-281 Brazil

AIM TO correlate Helicobacter pylori （H. pylorli）, EpsteinBarr virus （EBV） and human papillomavirus （HPV） with gastric cancer （GC） cases in Para State, *** Tissue samples were obtained from 302 gastric adenocarcinomas. A rapid urease test was used to detect the presence of H. pylori, and the presence of the cagA gene in the HP-positive samples was confirmed by PCR. An RNA in situ hybridization test designed to complement Eberl RNA was used to detect the presence of EBV in the samples, and the L1 region of HPV was detected using nested PCR. Positive HPV samples were genotyped and analyzed for E6 and E7 viral gene expression. Infections were also correlated with the clinical and pathological characteristics of the *** The majority of the 302 samples analyzed were obtained from men （65%） aged 55 years or older （67%） and were classified as the intestinal subtype （55%）. All three pathogens were found in the samples analyzed in the present study （H. pylori： 87%, EBV： 20%, HPV： 3%）. Overall, 78% of the H. pylori-positive （H. pylorl＋） samples were cagA＋（H. pylori-cagA＋）, and there was an association between the cytotoxic product of this gene and EBV. Coinfections of H. pylori-cagA＋ and EBV were correlated with the most advanced tumor stages. Although only 20% of the tumors were positive for EBV, infection with this virus was associated with distant metastasis. Only the HPV 16 and 18 strains were found in the samples, although no expression of the E6 and E7 oncoproteins was detected. The fundus of the stomach was the region least affected by the *** HPV was not involved in gastric tumorigenesis. Prophy- lactic and therapeutic measures against H. pylori and EBV may prevent the development of GC, especially the more aggressive forms.

关键词： Gastric cancer Gastric adenocarcinomas Microorganisms Helicobacter pylori cagA Epstein-Barr virus Human papillomavirus

Color of Corn Grains and Carotenoid Profile of Importance for Human Health

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American Journal of Plant Sciences 2014年第6期5卷 857-862页

作者： Sara de Almeida Rios Maria Cristina Dias Paes Wilton soares cardoso Aluízio Borém Flávia França Teixeira Embrapa Western Amazon ManausBrazil Embrapa Maize and Sorghum Sete LagoasBrazil Federal Institute of Education Science and Technology of the Espírito SantoIFESVenda Nova do ImigranteBrazil Federal University of Vicosa VicosaBrazil

The increasing on the levels of carotenoids in staple foods of broad human consumption is one of the strategies of food biofortification programs, mainly due to the importance of these compounds to human health on the prevention of vitamin A deficiency. Maize is a major staple food due to its high consumption in regions where problems of Vitamin A deficiency are of great relevance. Maize biofortification programs have made progress in determining the amounts of carotenoids in grain of thousands of accesses. This work aimed at studying the influence of the color of the grains in the profile of carotenoids in four different Brazilian genotypes. The selection of ears within the same genotype was based on a color scale, considering the lighter (lightest yellow) in one group and the most colorful (darkest orange) in another group. Significant interactions (p 0.05) between the color of the grains and the genotypes for all the variables were detected in addition to genetic variability for both groups (lightest yellow and darkest orange). The colored ears of corn showed a high level of total carotenoids (TC) and fractions in RS 535 and RS 445, and the colorful ears of genotype RS 535 showed 300% more α + β carotenes (μg·g-1) in relation to lighter of this same material. The results of this study showed the influence of genotype on the grain color and content of carotenoids, indicating that breeders have the flexibility to make selection of some genotypes based on grain color, reducing cost and time compared to laboratory methods used for the screening of genetic materials.

关键词： Carotenes Zea mays Vitamin A Genetic Variability Biofortification

In Vitro Evaluation of Two Tissue Substitutes for Gingival Augmentation

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Journal of Biomaterials and Nanobiotechnology 2023年第2期14卷 23-34页

作者： Tulio cardoso dos Santos Carlos Nelson Elias Alexandre Barboza Lemos Andresa Borges soares André Antonio Pelegrine Lucas Novaes Teixeira Elizabeth Ferreira Martinez Division of Oral Implantology Faculdade S&#227o Leopoldo Mandic Campinas SP Brazil Department of Materials Science Military Institute of Engineering (IME) Rio de Janeiro RJ Brazil Division of Oral Pathology Faculdade S&#227o Leopoldo Mandic Campinas SP Brazil Division of Cell Biology Faculdade S&#227o Leopoldo Mandic Campinas SP Brazil

Three-dimensional collagen matrices of porcine origin are being used as substitutes for soft tissue grafts in periodontal plastic surgery in search of aesthetic and natural results. This in vitro study aimed to compare Fibro-Gide® (GeistlichBiomaterials) and Mucoderm® (BotissBiomaterials) matrices during the initial phase of soft tissue formation. For this purpose, samples of 5 × 5 mm were obtained, and then human fibroblasts were plated on them. After 24, 48 and 72 h, cell viability was assessed using an MTT assay, and the secretion of type I collagen, MMP-2, TIMP-1 and TIMP-2 was analyzed by ELISA immunoassay. The control group (C) consisted of cells plated on polystyrene without the matrices. The morphology of the surfaces was also examined using scanning electron microscopy (SEM), as was the average roughness (Ra) of the samples by a profilometer. Topographic analysis revealed that roughness was significantly higher on Mucoderm® than on Fibro-Gide® (p 0.05). The synthesis of type I collagen, MMP-2 and TIMP-1 were significantly higher from cells plated on Fibro-Gide® than on Mucoderm®, in all time points (p ® than on Mucoderm® (p ® induced an increase in type I collagen, MMP-2 and TIMP-1 and TIMP-2.

关键词： Collagen Matrices Gingival Recession Periodontal Regeneration Matrix Metalloproteinases

XRD and UV-vis-NIR Spectroscopy Characterization of Gamma Rays Irradiated and Non-Irradiated Quartz Nanoparticles to be Used in Solar Cells Encapsulament

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材料科学与工程（中英文版） 2010年第9期4卷 10-19页

作者： Igor Alessandro Silva Carvalho Fernando soares Lameiras Vitor Jose Pinto Gouveia Belinazir Costa doEspirito Santo Jose Roberto Tavares Branco Antonia Sonia Alves cardoso Diniz Fundagao Centro Tecnologico de Minas Gerais Nucleous of Solar Materials Brasil 31.170-000 Rede Tematica em Engenharia de A lateriais Brasil 35.400-000 Department of Nuclear Engineering Centro de Desenvolvimento de Tecnologia Nuclear Brasil 31.270-901 Department of Chemical Engineering Universidade Federal de Minas Gerais Brasil 31.270.901 School of Desing Universidade do Estado de Minas Gerais Brasil 31.270-010 Companhia Energetica de Minas Gerais Brasil 30.190-131

Genetic and Phenotypic Parameters in the Selection of Upland Rice Genotypes

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American Journal of Plant Sciences 2017年第13期8卷 3450-3459页

作者： Camila soares cardoso da Silva Flávia Barbosa Silva Botelho Cinthia Souza Rodrigues Marcela Pedroso Mendes Amanda Mendes de Moura Antonio Rosário Neto Federal University of Lavras(UFLA) LavrasBrazil Federal University of Goiás(UFG) GoianiaBrazil

To assist in upland rice breeding programs, estimated genetic and phenotypic parameters are extremely important in the selection of superior lines. Thus, the objective of this study was estimate the genetic and phenotypic parameters of upland rice lines of the breeding program of UFLA in partnership with Embrapa Arroz e Feijao and Epamig. The experiment was installed in an experimental area of the Department of Agriculture at UFLA. It was evaluated 36 upland rice lines of the preliminary trial of the 2014/15 season, in randomized blocks, with three replications and plots consisted of five rows and each row has four meters. For this, it was evaluated the characters: plant height (cm), yield (kg·ha-1), 100-grain weight, days until flowering, percentage of filled grains and rice blast severity. The variance analysis and genetic parameters were estimated using the software SAS. To evaluate the experimental precision was estimated the accuracy, which varied between 63% and 98%, showing experimental precision, moderate to high. The lines differed significantly for all characters, meaning there is genetic variability among genotypes evaluated. With intensity of selection of 10% of lines, it was obtained a genetic gain of 325.29 kg·ha-1 in the character productivity, a plant height (cm) reduction in 5.50 cm, and days until flowering, with a reduction of 9.23 days, with selection of earlier plants. The estimated values for heritability ranged from 38% - 96%. Estimates confirm the possible success with the selection of the upland rice lines for these characters.

关键词： Lines Plants Breeding Preliminary Trial Oryza sativa

Physical Activity Alters Superoxide Dismutase Activity and Intercellular Adhesion Molecule 1 Levels in Diabetes Mellitus Type 2 Patients

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Journal of Biosciences and Medicines 2023年第7期11卷 140-150页

作者： Anderson Martins Tavares Leonardo Matta Jaslana Hainfellner da Silva Christiane de Oliveira Bensusan Carla do Nascimento Giselle Fernandes Taboada Rodrigo soares Fortunato Luciene de Carvalho cardoso-Weide Postgraduate Program in Medical Sciences School of Medicine UFF-Universidade Federal Fluminense Rio de Janeiro Brazil Carlos Chagas Filho Institute of Biophysics UFRJ-Federal University of Rio de Janeiro Rio de Janeiro Brazil School of Biology University Salgado de Oliveira Rio de Janeiro Brazil Endocrinology Unit Department of Internal Medicine School of Medicine UFF-Universidade Federal Fluminense Rio de Janeiro Brazil Medical School Department of Pathology UFF-Universidade Federal Fluminense Rio de Janeiro Brazil Luciene de Carvalho cardoso Weide Medical School Department of Pathology UFF-Universidade Federal Fluminense Rio de Janeiro Brazil

Background: Oxidative stress and inflammation are related to the pathophysiology of diabetes mellitus (DM), being involved in the development of micro-and macrovascular complications. Physical activity is beneficial for DM patients, but little is known about the relationship between redox and inflammation biomarkers and the level of physical activity in these patients. Based on this, this research aims to evaluate the effects of physical activity level on redox stress parameters and inflammatory markers in T2DM patients. Methods: Eighty-four patients with T2DM were divided according to their physical activity level: group A (n = 48), sedentary;group B (n = 11) active (3 times a week, 150 min) and group C (n = 25), highly active (5 times a week, 150 - 300 mins, at least). Anthropometric and biochemical parameters, superoxide dismutase (SOD) and glutathione peroxidase (GPx) activities, as well as GSH, sRAGE and ICAM-1 levels were assessed. Results: Glycated haemoglobin, total cholesterol, and LDL-cholesterol levels were lower in the highly active group in comparison to other groups. Plasma SOD activity was higher in group C compared to Group A, while ICAM-1 levels were significantly higher in group B when compared to other groups. Conclusion: Our results suggest that the practice of physical activity is beneficial to T2DM patients, especially at high volume and frequency.

关键词： Cardiovascular Risk Exercise Health Inflammation Oxidative Stress

Chemical Characterization and in Vitro Antitumor Activity of the Essential Oils from the Leaves and Flowers of Callistemon viminalis

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American Journal of Plant Sciences 2015年第16期6卷 2664-2671页

作者： Christiane Maria de Oliveira Maria das Gracas cardoso Marisa Ionta Marisi Gomes soares Juliana de Andrade Santiago Guilherme álvaro Ferreira da Silva Maria Luisa Teixeira Danúbia Aparecida de Carvalho Selvati Rezende Rafaela Vieira de Souza Luana Isac soares David Lee Nelson Marcos Schleiden Sousa Carvalho Department of Chemistry Federal University of LavrasLavrasBrazil Institute of Biomedical Sciences Federal University of AlfenasAlfenasBrazil Department of Chemistry Federal University of AlfenasAlfenasBrazil Federal University of Vales de Jequitinhonha e Mucuri DiamantinaBrazil Department of Agriculture Federal University of LavrasLavrasBrazil

The objective of this study was to characterize and verify the in vitro antitumor activity of essential oils (EOs) extracted from the leaves and flowers of Callistemon viminalis. The EOs were extracted by hydrodistillation using a modified Clevenger apparatus. The identification and quantification of constituents were performed on a gas chromatograph coupled to a mass spectrometer and a gas chromatograph with a flame ionization detector. The antitumoral activity was evaluated by a colorimetric assay (MTS) using different cell lines derived from human tumors (breast, lung, glioblastoma, and melanoma). The major constituents of the EOs of leaves and flowers were similar, only quantitative differences being observed. The compounds 1,8-cineole, α-pinene and α-terpineol were found in concentrations of 50.4%, 25.8% and 8.7% in the EOs obtained from the leaves and 48.8%, 24.5% and 3.9% in the EOs obtained from the flowers, respectively. The cytotoxic activity of the EOs was observed only in melanoma cultures (HT144). Cultures treated for 48 h with EOs from leaves and flowers (200 μg·mL-1) reduced the viability by 40% and 25%, respectively. Thus, the antiproliferative activity of the EO from leaves was more pronounced than the EO from flowers in cells derived from melanoma.

关键词： Cancer Volatile Oil Escova-de-Garrafa(Bottle Brush)