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International Journal of Minerals,Metallurgy and Materials 2020年第1期27卷 46-54页

作者： Fabiane carvalho Ballotin Mayra Nascimento Sara Silveira Vieira Alexandre carvalho Bertoli Ottávio Carmignano ana paula de carvalho teixeira Rochel Montero Lago departamento de Química Universidade Federal de Minas GeraisBelo HorizonteBrasil Doutorado Inovação/Mineradora Pedras Congonhas Universidade Federal de Minas Gerais31270-901 Belo Horizonte-MGBrazil

In this work, different magnesium silicate mineral samples based on antigorite, lizardite, chrysotile(which have the same general formula Mg3Si2O5(OH)4), and talc(Mg3Si4O10(OH)2) were reacted with KOH to prepare catalysts for biodiesel production. Simple impregnation with 20 wt% K and treatment at 700–900°C led to a solid-state reaction to mainly form the K2MgSiO4 phase in all samples. These results indicate that the K ion can diffuse into the different Mg silicate structures and textures, likely through intercalation in the interlayer space of the different mineral samples followed by dehydroxylation and K2MgSiO4 formation. All the materials showed catalytic activity for the transesterification of soybean oil(1:6 of oil : methanol molar ratio, 5 wt% of catalyst, 60°C). However, the best results were obtained for the antigorite and chrysotile precursors, which are discussed in terms of mineral structure and the more efficient formation of the active phase K2MgSiO4.

关键词： silicate serpentinite lizardite antigorite talc chrysotile biodiesel

Ecophysiological acclimatization to cyclic water stress in Eucalyptus

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Journal of Forestry Research 2020年第3期31卷 797-806页

作者： Rogerio de Souza Noia Junior Genilda Canuto Amaral Jose Eduardo Macedo Pezzopane Mariana Duarte Silva Fonseca ana paula Camara da Silva Talita Miranda teixeira Xavier department of Biosystems Engineering ESALQ University of Sao PauloPiracicabaSao PauloBrazil department of Forestry Sciences NEDTEC Federal University of Espirito SantoJero nimo MonteiroEspirito SantoBrazil

Drought is considered the main environmental factor limiting productivity in eucalyptus plantations in Brazil. However, recent studies have reported that exposure to water deficit conditions enables plants to respond to subsequent stresses. Thus, this study investigates the ecophysiological acclimatization of eucalyptus clones submitted to recurrent water deficit cycles. Eucalyptus seedlings were submitted to three recurrent water deficit cycles and anatomical, morphological and physiological changes were analyzed. The results were:(1) Eucalyptus seedlings responded to water deficits by directing carbohydrates to root and stem growth;(2) Size and number of stomata were reduced;(3) Stomatal conductance decreased which allowed the plants to reduce water losses through transpiration,increasing instantaneous water use efficiency;(4) The relationship between gas exchanges and available water contents allowed the seedlings to uptake the retained soil water athigher tensions;and,(5) Physiological recovery from subsequent water deficits became faster. As a result of these changes, the eucalyptus seedlings recovered from the same degree of water stress more rapidly.

关键词： Carbon partition Drought Gas exchange Morpho-physiological changes Photosynthetic apparatus

Multicultural care in nursing—From the theoretical paradigm to the subjective experiences in clinical settings

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Open Journal of Nursing 2013年第8期3卷 557-562页

作者： ana paula teixeira de Almeida Monteiro Aida Cruz Mendes Nursing School of Coimbra CoimbraPortugal Unidade de Investigacao em Ciencias da Saude-Enfermagem(UICISA-E) CoimbraPortugal

Last decade, the geography of immigration in Portugal experienced intense transformations with an increasing inflow of new and diversified migratory groups. An open questionnaire was developed and applied to 22 Portuguese nurses, aiming to analyse personal experiences and significant situations of nursing care in multicultural contexts. The understanding of hospital routines, difficulties in managing physical space due to different cultural standards, body exposure, and body handling in nursing clinical care, emerged as more significant issues in reports of critical incidents focusing on multicultural contexts.

关键词： Multicultural Nursing Mental Health and Culture

Glucose-6-phosphate-dehydrogenase deficiency and its correlation with other risk factors in jaundiced newborns in Southern Brazil

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Asian Pacific Journal of Tropical Biomedicine 2011年第2期1卷 110-113页

作者： Clarissa Gutirrez carvalho Simone Martins Castro ana paula Santin Carina Zaleski Felipe Gutirrez carvalho Roberto Giugliani Genetics Service Hospital de Clinicas de Porto AlegrePGP in PediatricsUFRGS Pharmacy School UFRGS Medical School UFRGS

Objective:To evaluate the correlation between glucose-6-phosphate-dehydrogenase(G6PD) deficiency and neonatal ***:Prospective,observational case-control study was conducted on 490 newborns admitted to Hospital de Clinicas de Porto Alegre for phototherapy, who all experienced 35 or more weeks of gestation,from March to december *** screening of G6PD activity was performed,followed by ***:There was prevalence of 4.6% and a boy-girl ratio of 3:1 in jaundiced *** jaundiced neonate with ABO incompatibility presented G6PD deficiency,and no Mediterranean mutation was found.A higher proportion of deficiency was observed in *** was no association with UGT1A1 variants. Conclusions:G6PD deficiency is not related to severe hyperbilirubinemia and considering the high miscegenation in this area of Brazil,other gene interactions should be investigated.

关键词： Glucosephosphate dehydrogenase Jaundice Hyperbilirubinemia Neonatal Hemoglobin

Systemic mastocytosis: A rare cause of non-cirrhotic portal hypertension

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World Journal of Gastroenterology 2016年第28期22卷 6559-6564页

作者： Cláudio Martins Cristina teixeira Suzane Ribeiro Daniel Trabulo Cláudia Cardoso Joao Mangualde Ricardo Freire élia Gamito ana Luísa Alves Isabelle Cremers Cecília Alves anabela Neves ana paula Oliveira department of Gastroenterology Setubal Hospital Center - Sao Bernardo Hospital 2910 Setubal Portugal department of Pathology Setubal Hospital Center - Sao Bernardo Hospital 2910 Setubal Portugal department of Hematology Setubal Hospital Center - Sao Bernardo Hospital 2910 Setubal Portugal

Mastocytosis is a clonal neoplastic disorder of the mast cells(MC) that can be limited to the skin(cutaneous mastocytosis) or involve one or more extracutaneous organs(systemic mastocytosis). The clinical manifestations of mastocytosis are heterogeneous ranging from indolent disease with a long-term survival to a highly aggressive neoplasm with survival of about 6 mo. Although liver involvement in aggressive systemic mastocytosis(ASM) is relatively common, the development of portal hypertension with or without cirrhosis is rare. We report a case of ASM without skin involvement in a 72-year-old caucasian male who presented with non-cirrhotic portal hypertension based on clinical, analytical, imagiological and endoscopic findings. Given the hematological picture, the correct diagnosis was established based on ancillary tests for MC using bone marrow aspirates and biopsy. Extensive involvement of the liver and gastrointestinal tract was histologically documented. The disease progressed rapidly and severe pancytopenia and recurrent upper gastrointestinal bleeding became the dominant problem. This case illustrates the challenge in establishing a diagnosis of ASM especially when the clinical picture is atypical and without skin involvement. Gastroenterologists should consider infiltrative disease, particularly systemic mastocytosis, as a differential diagnosis in a clinical case of portal hypertension of unknown etiology.

关键词： Systemic mastocytosis Mast cells Non-cirrhotic portal hypertension Upper gastrointestinal bleeding Cladribine

Phase angle and non-alcoholic fatty liver disease before and after bariatric surgery

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World Journal of Hepatology 2020年第11期12卷 1004-1019页

作者： Joise teixeira Claudio Augusto Marroni paula Rosales Zubiaurre ana Henz Lais Faina Lilian KethelynPinheiro Claudio Cora Mottin Sabrina Alves Fernandes department of Postgraduate Program in Medicine:Hepatology Universidade Federal de Ciências da Saúde de Porto AlegrePorto Alegre 90050170RSBrazil department of Gastroenterology and Hepatology Universidade Federal de Ciências da Saúde de Porto Alegre(UFCSPA)Porto Alegre 91760470RSBrazil department of Center of Morbid Obesity Pontificia Universidade Catolica do Rio Grande do Sul(PUCRS)Porto Alegre 90610000RSBrazil department of Nutrition Centro Universitario Metodista(IPA)Porto Alegre 90420060RSBrazil department of Vascular Surgery Hospital Federal dos Servidores do Estado do Rio de JaneiroRio de Janeiro 20221161RJBrazil department of Obesity and Metabolic Syndrome Center Pontificia Universidade Catolica do Rio Grande do Sul(PUCRS)Porto Alegre 90619-900RSBrazil

BACKGROUND Obesity is a global health problem that is continuing to increase in the young *** Brazil,the frequency of obesity in 2018 was 19.8%.Several comorbidities are directly associated with obesity,such as non-alcoholic fatty liver disease(NAFLD),which is considered the most common liver disorder in Western countries and affects up to 46%of *** surgery is effective in treating obesity and can improve NAFLD;however,the effect of bariatric surgery on body composition,phase angle(PA),and improving NAFLD needs to be further *** To analyze the PA in the postoperative period of bariatric surgery and to correlate it with changes in body composition and liver *** This study is a retrospective cohort study of the analysis of the medical records of patients undergoing bariatric surgery in a reference center of a teaching hospital in Porto Alegre over a 2-year *** older than 18 years whose record contained all information relevant to the study were *** data analyzed were body composition and PA through electrical bioimpedance and NAFLD through liver biopsy in the pre-and postoperative *** level of significance adopted for the statistical analyses was 5%.RESULTS We evaluated 379 patients with preoperative *** PA,169 patients were analyzed,and 33 patients had liver biopsy pre-and postoperatively with NAFLD *** total,79.4%were female,with a mean age of 39.1±10.6 *** average body mass index(BMI)was 45.9±7.5 kg/m².The PA showed a mean of 5.8±0.62°in the preoperative period and a significant reduction in the postoperative period.A postoperative reduction in body composition data(skeletal muscle mass,fat percentage,fat mass,body cell mass,BMI and visceral fat area)was shown as *** liver disease,all patients presented a reduction in the degrees and stages of liver disease in the postoperative period,and some had no degree of liver disease at *** PA decreased af

关键词： Obesity Body composition Bariatric surgery Phase angle Non-alcoholic fatty liver disease Liver disease

Robotic Surgery: An Effective Treatment Option for Epiphrenic Diverticulum Associated with Nutcracker Esophagus

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Surgical Science 2024年第1期15卷 1-6页

作者： Augusto Tinoco Gilberto carvalho Leonardo Tinoco ana paula Quintão department of Digestive Surgery Hospital S&#227o Jos&#233 do Ava&#237 Itaperuna Brazil

Background: Epiphrenic Diverticulum is frequently associated with esophageal motility disorders, such as nutcrackers esophagus. The diagnosis is usually made using imaging studies such as a Barium esophagogram, and esophageal manometry. Surgical treatment options for epiphrenic diverticulum and EN include diverticulectomy and wide myotomy. Aim: The resection of three epiphrenic diverticula and extensive myotomy were performed by robotic thoracoscopy uneventfully. Case presentation: A 65-year-old female complaining of dysphagia for solid foods, Chest pain and regurgitation. Esophagogastroduodenoscopy (EDG) with difficulty in advancing the endoscope at 25 cm and demonstrating an ED, no hiatal hernia and normal stomach and duodenum. Barium Esophagogram showed multiple diverticula and tortuosity throughout the esophagus. Conclusion: With robotic surgery, surgeons can perform highly precise operations with enhanced 3D vision and control. Through this cutting-edge approach, the treatment of ED associated with EN can be drastically changed, promising better outcomes for patients.

关键词： Robotic Surgery Myotomy Nutcracker Esophagus Epiphrenic Diverticulum

Preclinical stem cell therapy in Chagas Disease: Perspectives for future research

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World Journal of Transplantation 2013年第4期3卷 119-126页

作者： Katherine Athayde teixeira de carvalho Eltyeb Abdelwahid Reginaldo Justino Ferreira ana Carolina Irioda Luiz Cesar Guarita-Souza Cell Therapy and Biotechnology in Regenerative Medicine Research Group Pequeno Príncipe FacultyPelé Pequeno Príncipe InstituteCuritiba 80250-200ParanáBrazil Bioprocess Engineering and Biotechnology department Federal University of ParanáCuritiba 81531-970ParanáBrazil CBRC Massachusetts General Hospital/Harvard Medical SchoolCharlestownMa 02129United States Federal University of Technology Curitiba 80230-901ParanáBrazil Experimental Laboratory of Institute of Biological and Health Sciences of Pontifical Catholic University of Parana Curitiba 80215-901ParanáBrazil

Chagas cardiomyopathy still remains a challenging problem that is responsible for high morbidity and mortality in Central and Latin America. Chagas disease disrupts blood microcirculation via various autoimmune mechanisms, causing loss of cardiomyocytes and severe impairment of heart function. Different cell types and delivery approaches in Chagas Disease have been studied in both preclinical models and clinical trials. The main objective of this article is to clarify the reasons why the benefits that have been seen with cell therapy in preclinical models fail to translate to the clinical setting. This can be explained by crucial differences between the cellular types and pathophysiological mechanisms of the disease, as well as the differences between human patients and animal models. We discuss examples that demonstrate how the results from preclinical trials might have overestimated the efficacy of myocardial regeneration therapies. Future research should focus, not only on studying the best cell type to use but, very importantly, understanding the levels of safety and cellular interaction that can elicit efficient therapeutic effects in human tissue. Addressing the challenges associated with future research may ensure the success of stem cell therapy in improving preclinical models and the treatment of Chagas disease.

关键词： Chagas Disease preclinical stem cell therapy co-cultured translation pathophysiologie myoblasts

Rheological Study of Polymers Used as Viscosity Index Improvers for Automotive Lubricant Oils

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Journal of Modern Physics 2014年第12期5卷 1085-1093页

作者： ana paula Pena Almeida ana paula Lelis Rodrigues de Oliveira Cynthia D’ávila carvalho Erbetta Ricardo Geraldo de Sousa Roberto Fernando de Souza Freitas Maria Elisa Scarpelli Ribeiro e Silva Polymer Science and Technology Laboratory Chemical Engineering Department Engineering School Federal University of Minas Gerais Belo Horizonte Brazil

In this work, a rheological study of automotive lubricant oils, neutral light paraffinic (NLP) and neutral medium paraffinic (NMP), additivated with two commercial viscosity index improvers-VIIs, based on hydrogenated poly (isoprene-co-styrene), at different concentrations, was carried out. The study included the determination of the kinematic viscosity of the mixtures, the calculation of the viscosity indexes and their behavior when subjected to various rheometric experiments, including stress sweep, steady state flow, creep and recovery, and temperature ramp oscillatory tests. The obtained results showed the efficacy of the additives as viscosity index improvers, enabling a significant increase in the viscosity index of the pure oils at relatively low concentrations. The determination of the storage (G’) and of the loss (G”) moduli for the mixtures oil/VII additives showed a large predominance of the viscous effect over the elastic one. Except when under low shear stress, the mixtures showed a pseudoplastic behavior, with the flow curves being adjusted to fit the Ostwald-de-Waele model (Power Law), with negative flow behavior indexes.

关键词： Viscosity Index Improvers Automotive Lubricants Rheology Viscosity Index Polymer Additives

Viability of Lactobacillus acidophilus La-5 in the Presence of Williopsis saturnus vat. suaveolens

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Journal of Food Science and Engineering 2013年第4期3卷 176-186页

作者： Sabrina Neves Casarotti Aline Teodoro de paula Marilia Goncalves Cattelan Catharina Calochi Pires de carvalho ana Lucia Barretto Penna department of Food Engineering and Technology Sao Paulo State University Sao Jose do Rio Preto SP 15054000 Brazil

Maintaining the viability of probiotic microorganisms from production to consumption has long been a technological challenge for the food industry. The objectives of this study were to evaluate the in vitro interaction between Lactobacillus acidophilus La-5 and Williopsis saturnus var. suaveolens and the effect of this yeast on acidification kinetics, viability ofLactobacillus acidophilus and post-acidification in fermented milk during refrigerated storage at 5℃. The in vitro study showed a positive interaction between the acid cell free-supernatant （CFS） ofprobiotic bacteria La-5 and the yeast. The addition of W. saturnus var. suaveolens increased the fermentation time due to consumption of the organic acids produced by L. acidophilus. During the refrigerated storage of the samples, the presence of the yeast increased the viability of L. acidophilus and reduced post-acidification. However, the mechanism of such interaction of bacteria and yeast is not fully understood.

关键词： Probiotic lactic acid bacteria yeast W. saturnus var. suaveolens fermented dairy products viability