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Objectives: To summarize evidence-based cognitive-behavioral therapy (CBT) treatment and propose clinical interventions for adult patients with obsessive-compulsive disorder (OCD). Methods: The literature on CBT interventions for adult OCD, including BT and exposure and response prevention, was systematically reviewed to develop updated clinical guidelines for clinicians, providing comprehensive details about the necessary procedures for the CBT protocol. We searched the literature from 2013-2020 in five databases (PubMed, Cochrane, Embase, PsycINFO, and Lilacs) regarding study design, primary outcome measures, publication type, and language. Selected articles were assessed for quality with validated tools. Treatment recommendations were classified according to levels of evidence developed by the American College of Cardiology and the American Heart Association. Results: We examined 44 new studies used to update the 2013 American Psychiatric Association guidelines. High-quality evidence supports CBT with exposure and response prevention techniques as a first-line treatment for OCD. Protocols for Internet-delivered CBT have also proven efficacious for adults with OCD. Conclusion: High-quality scientific evidence supports the use of CBT with exposure and response prevention to treat adults with OCD.

https://doi.org/10.47626/1516-4446-2023-3081

S100 Proteins and their Implication in the Thalamus: An Integrative Review
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de-Britto, André Moura

; Rúbia, Letícia Gama

; Fernandes Matos, Lanay

; Macson da-Silva, Natanias

; Sousa da-Rocha, Gabriel

; Queiroz de-Aquino, Antônio Carlos

; Pierdoná Guzen, Fausto

; Clebeson de-Oliveira, Lucídio

; Pessoa de-Araújo, Dayane

; Araúj de-Góis-Morais, Paulo Leonardo

; Lopes de Paiva Cavalcanti, José Rodolfo

International Journal of Morphology

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apr 2023, Volume 41 N. 2 Pages 518 - 521

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

RESUMEN: Las proteínas S100 pertenecen al grupo de proteínas fijadoras de calcio y están presentes en actividades reguladoras fisiológicas intracelulares y extracelulares, como la diferenciación celular, y actúan en procesos patológicos inflamatorios y neoplásicos. Recientemente, sus expresiones en el sistema nervioso han sido ampliamente estudiadas, buscando dilucidar su acción a nivel del tálamo: una estructura del sistema nervioso central que forma parte de importantes circuitos, como el somatosensorial, conductual, de memoria y cognitivo, así como además de ser responsable de la transmisión y regulación de la información a la corteza cerebral. Este artículo es una revisión integradora de la literatura científica, que analizó 12 estudios presentes en Pubmed. El análisis mostró que la relación de las proteínas S100 y el tálamo ha sido descrita en procesos neoplásicos, trastornos mentales, hipoxia, trauma, estrés, infección, enfermedad de Parkinson y epilepsia. En resumen, es posible concluir que esta familia de proteínas es relevante como marcador en procesos de lesión talámica, requiriendo más estudios para comprender mejor su significado clínico, preclínico y su valor pronóstico.

SUMMARY: S100 proteins belong group of calcium-binding proteins and are present in physiological intracellular and extracellular regulatory activities, such as cell differentiation, and act in inflammatory and neoplastic pathological processes. Recently, its expressions in the nervous system have been extensively studied, seeking to elucidate its action at the level of the thalamus: A structure of the central nervous system that is part of important circuits, such as somatosensory, behavioral, memory and cognitive, as well as being responsible for the transmission and regulation of information to the cerebral cortex. This article is an integrative review of scientific literature, which analyzed 12 studies present in Pubmed. The analysis showed that the relationship of S100 proteins and the thalamus has been described in neoplastic processes, mental disorders, hypoxia, trauma, stress, infection, Parkinson's disease and epilepsy. In summary, it is possible to conclude that this protein family is relevant as a marker in processes of thalamic injury, requiring further studies to better understand its clinical, preclinical meanings and its prognostic value.

Brazilian Research Consortium on Obsessive-Compulsive Spectrum Disorders guidelines for the treatment of adult obsessive-compulsive disorder. Part I: pharmacological treatment
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de Oliveira, Marcos Vinícius Sousa

; de Barros, Pedro Macul Ferreira

; de Mathis, Maria Alice

; Boavista, Rodrigo

; Chacon, Priscila

; Echevarria, Marco Antonio Nocito

; Ferrão, Ygor Arzeno

; Vattimo, Edoardo Felippo de Queiroz

; Lopes, Antônio Carlos

; Torres, Albina Rodrigues

; Diniz, Juliana Belo

; Fontenelle, Leonardo F.

; Rosário, Maria Conceição do

; Shavitt, Roseli Gedanke

; Miguel, Eurípedes Constantino

; da Silva, Renata de Melo Felipe

; Costa, Daniel Lucas da Conceição

Brazilian Journal of Psychiatry

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apr 2023, Volume 45 N. 2 Pages 146 - 161

Abstract: En | Text: En | PDF: En

Objectives: To summarize evidence-based pharmacological treatments and provide guidance on clinical interventions for adult patients with obsessive-compulsive disorder (OCD). Methods: The American Psychiatric Association (APA) guidelines for the treatment of OCD (2013) were updated with a systematic review assessing the efficacy of pharmacological treatments for adult OCD, comprising monotherapy with selective serotonin reuptake inhibitors (SSRIs), clomipramine, serotonin and norepinephrine reuptake inhibitors (SNRIs), and augmentation strategies with clomipramine, antipsychotics, and glutamate-modulating agents. We searched for the literature published from 2013-2020 in five databases, considering the design of the study, primary outcome measures, types of publication, and language. Selected articles had their quality assessed with validated tools. Treatment recommendations were classified according to levels of evidence developed by the American College of Cardiology and the American Heart Association (ACC/AHA). Results: We examined 57 new studies to update the 2013 APA guidelines. High-quality evidence supports SSRIs for first-line pharmacological treatment of OCD. Moreover, augmentation of SSRIs with antipsychotics (risperidone, aripiprazole) is the most evidence-based pharmacological intervention for SSRI-resistant OCD. Conclusion: SSRIs, in the highest recommended or tolerable doses for 8-12 weeks, remain the first-line treatment for adult OCD. Optimal augmentation strategies for SSRI-resistant OCD include low doses of risperidone or aripiprazole. Pharmacological treatments considered ineffective or potentially harmful, such as monotherapy with antipsychotics or augmentation with ketamine, lamotrigine, or N-acetylcysteine, have also been detailed.

https://doi.org/10.47626/1516-4446-2022-2891

The Challenges of Implementing a Text Message Intervention to Promote Behavioral Change in Primary Care Patients With Hypertension and Diabetes
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Oliveira, João Antonio de Queiroz

; Cimini, Christiane

; Almeida, Vania

; Maia, Junia Xavier

; Resende, Raissa Eda

; Gualberto, Leticia Alves

; Santos, Pedro Henrique Lauar

; Gomes, Paulo R.

; Bonisson, Leonardo

; Paixão, Maria Cristina

; Costa, Janaina Moutinho

; Cardoso, Clareci Silva

; Santo, Karla

; Ribeiro, Antonio

; Martins, Maria Auxiliadora

; Marcolino, Milena S.

International Journal of Cardiovascular Sciences

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2023, Volume 36 elocation e20220050

Abstract: En | Text: En | PDF: En

Abstract Background Controlling blood pressure and glycemic levels is a challenge that requires innovative solutions. Objective To assess the feasibility of implementing a text message intervention among low-income primary care patients, as well as to assess self-reported behavioral change. Methods A set of 200 text messages was developed on healthy eating, physical activity, adherence, and motivation. Participants from Vale do Mucuri, MG, Brazil diagnosed with diabetes or hypertension or undergoing screening for those diseases, received 5 to 8 messages per week for 6 months. They answered a questionnaire to report their satisfaction and behavioral changes. Results Of the 136 patients, 117 (86.0%) answered the questionnaire. Most reported that the messages were very useful (86.3%), easy to understand (90.6%), and were very helpful for behavioral change (65.0%); 84.6% reported that they had started eating healthier. The most frequent reported lifestyle changes were: improved diet quality (85.5%), reduced portions (65.8%), and weight loss (56.4%). The majority of patients shared the messages (60.7%) with family or other acquaintances, considered the number of messages to be adequate (89.7%) and would recommend the program to others (95.7%). Conclusion An intervention based on text messages to promote behavioral change in patients with hypertension or diabetes in primary care is feasible in low-resource settings. Future studies are needed to assess the program’s long-term effects on clinical outcomes.

https://doi.org/10.36660/ijcs.20220050

Construção e Validação do Protocolo EmpoderACO Direcionado a Pacientes em Anticoagulação Oral com Varfarina
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Barbosa, Hannah Cardoso

; Torres, Heloisa de Carvalho

; Oliveira, João Antônio de Queiroz

; Santos, Rebeca Priscila de Melo

; Costa, Josiane Moreira da

; Miranda, Leonardo Gonçalves

; Pagano, Adriana Silvina

; Praxedes, Marcus Fernando da Silva

; Martins, Maria Auxiliadora Parreiras

Arquivos Brasileiros de Cardiologia

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2023, Volume 120 N. 6 elocation e20220576

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

Abstract Background Warfarin is an oral anticoagulant that is very useful in preventing thromboembolism, though it is considered a drug with a high risk of causing adverse events. Considering the practical challenges in controlling oral anticoagulation, the patients on warfarin could benefit from educational strategies aimed at behavioral changes, active participation in self-care, and adherence to drug therapy. Objective The aim was to construct and validate the EmpoderACO protocol for behavioral changes in warfarin patients. Methods The methodological steps were: definition of concepts and domains of self-care, identification of objectives, construction and selection of items, assessment of content validity, and pre-test in the target population. Results Relevance, adequacy, clarity, and internal reliability of the instrument’s items were assessed by a multidisciplinary judges committee (JC) through the E-surv web platform, obtaining an average agreement of ≥0.91. The understanding of the instrument measured by the target population revealed adequate clarity with a coefficient average of 0.96. Conclusion EmpoderACO can aid in qualifying the communication process between medical professionals and patients, as well as in improving adherence to both treatment and clinical outcomes, and can be replicated in healthcare settings.

Resumo Fundamento A varfarina é um anticoagulante oral útil para prevenção de tromboembolismo, embora seja considerado fármaco de alto risco de causar eventos adversos. Considerando os desafios práticos no controle da anticoagulação oral, os pacientes poderiam se beneficiar de estratégias educacionais que visem mudança de comportamento, participação ativa no autocuidado e adesão à farmacoterapia. Objetivo Construir e validar o protocolo EmpoderACO para mudança de comportamento em pacientes em uso de varfarina. Métodos As etapas metodológicas foram: definição de conceitos e domínios do autocuidado, identificação dos objetivos, construção e seleção dos itens, avaliação da validade de conteúdo e pré-teste na população alvo. Resultados Relevância, adequação, clareza e confiabilidade interna dos itens do instrumento foram avaliadas por comitê de juízes multiprofissional pela plataforma web E-surv, obtendo-se média de concordância ≥0,91. A compreensão do instrumento pela população-alvo teve clareza adequada com média de 0,96. Conclusão O EmpoderACO poderá contribuir para qualificar o processo de comunicação entre profissionais e pacientes, melhorar a adesão ao tratamento e os resultados clínicos, podendo ser replicado nos serviços de saúde.

https://doi.org/10.36660/abc.20220576

Cochlear implant complications in a low-income area of Brazil
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Castro, Gabriel Reis

; Santiago, Hágada Cristine Coelho

; Aguiar, Rosauro Rodrigues de

; Almeida, Ana Beatriz Gouveia de

; Oliveira, Leonardo Santana Ramos

; Gurgel, Ricardo Queiroz

Revista da Associação Médica Brasileira

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may 2022, Volume 68 N. 5 Pages 568 - 573

Abstract: En | Text: En | PDF: En

SUMMARY OBJECTIVE: The primary objective was to analyze and report on the complications that occurred in the cochlear implant surgeries performed at a large philanthropic teaching hospital located in a low-income area of Brazil. METHODS: A historical cohort study that analyzed surgical records of 432 patients of all age groups and both genders who received unilateral cochlear implant in a tertiary referral center that serves only Brazil's Public Health Care System patients, from February 2009 to December 2017. RESULTS: A total of 67 (15.5%) complications occurred in the cochlear implant surgeries, with 21 (5.4%) major complications. Minor complications occurred in 50 (12%) cases. The most frequent major complication was receiver-stimulator displacement (four cases). There were three cases of hardware failure. Only one case of meningitis and one case of facial nerve paralysis (grade VI in House-Brackmann scale) were found. Six patients needed to be explanted due to a major complication. The relative risk of major complications in the population aged 60 years and older was 4.41 (1.53–12.72; 95% confidence interval [CI]). CONCLUSIONS: Elderly patients suffered more complications than younger patients. receiver-stimulator displacement and dizziness were the most frequent complications (major and minor, respectively). The overall complication rates were comparable to those in the literature. Age as an isolated risk factor for complications in cochlear implant surgery is a path to be explored in future observations.

https://doi.org/10.1590/1806-9282.20210924

Chitosan combined with technical cashew nut shell liquid improves in vitro ruminal parameters and gas production kinetics
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Vieira, Elis Regina de Queiroz

; Goes, Rafael Henrique de Tonissi e Buschinelli de

; Diaz, Tatiana Garcia

; Osmari, Milene Puntel

; Seno, Leonardo de Oliveira

; Ítavo, Luís Carlos Vinhas

; Gandra, Jefferson Rodrigues

; Anschau, Douglas Gabriel

; Oliveira, Raquel Tenório de

; Silva, Nayara Gonçalves da

; Jacaúna, Amanna Gonzaga

Revista Brasileira de Zootecnia

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2022, Volume 51 elocation e20200186

Abstract: En | Text: En | PDF: En

ABSTRACT The objective was to evaluate the inclusion of chitosan (CHI) and technical cashew nut shell liquid (CNSLt) as natural feed additives in cattle diets on nutrient digestibility, ruminal fermentation, and in vitro gas production kinetics. We conducted a completely randomized design with 5×4 factorial arrangement, with 20, 35, 50, 65, and 100% Tifton 85 hay and four additives, monensin (200 mg/kg DM), CNSLt (500 mg/kg DM), CHI (500 mg/kg DM), and CNSLt+CHI (500 mg/kg DM/each). Dry matter (DM) and organic matter (OM) digestibility showed a linear reduction according to forage levels. The highest DM digestibility was observed with CHI on cattle diets. Inclusion of CHI increased DM digestibility. The highest in vitro organic matter and crude protein (CP) digestibilities were observed for CNSLt+CHI. The in vitro dry matter digestibility increased linearly with concentrate in the diet. There was interaction of forage:concentrate ratio and the additives for neutral detergent fiber, acid detergent fiber and hemicellulose digestibility. Chitosan, CNSLt, and CNSLt+CHI promoted the lowest acetate:propionate ratio compared with monensin. Total gas production showed interaction of the forage:concentrate ratio and additives. Lag time was lowest with CNSLt+CHI. Chitosan and CNSLt can be considered alternative fermentation modulators to ionophores by improving nutrient digestibility and increasing ruminal propionate concentrations.

https://doi.org/10.37496/rbz5120200186

GUT MICROBIOTA, PREBIOTICS, PROBIOTICS, AND SYNBIOTICS IN GASTROINTESTINAL AND LIVER DISEASES: PROCEEDINGS OF A JOINT MEETING OF THE BRAZILIAN SOCIETY OF HEPATOLOGY (SBH), BRAZILIAN NUCLEUS FOR THE STUDY OF HELICOBACTER PYLORI AND MICROBIOTA (NBEHPM), AND BRAZILIAN FEDERATION OF GASTROENTEROLOGY (FBG)
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BARBUTI, Ricardo Correa

; SCHIAVON, Leonardo Lucca

; OLIVEIRA, Cláudia P

; ALVARES-DA-SILVA, Mário Reis

; SASSAKI, Lígia Yukie

; PASSOS, Maria do Carmo F

; FARIAS, Alberto Queiroz

; BARROS, Luisa Leite

; BARRETO, Bruno Paes

; ALBUQUERQUE, Gisela Bandeira de Melo Lins de

; ALVES, Amanda Mandarino

; NAVARRO-RODRIGUEZ, Tomás

; BITTENCOURT, Paulo Lisboa

Arquivos de Gastroenterologia

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dec 2020, Volume 57 N. 4 Pages 381 - 398

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Nos últimos anos, um volume crescente de evidências indica que os microrganismos estão envolvidos na manutenção da saúde humana e também estão relacionados a várias doenças, tanto intestinais quanto extraintestinais. Alterações na microbiota intestinal parecem ser um elemento chave na patogênese de doenças hepáticas e gastrointestinais, incluindo doença hepática gordurosa não-alcoólica, doença hepática alcoólica, cirrose hepática, doenças inflamatórias intestinais, síndrome do intestino irritável e diarreia associada ao Clostridium difficile. Em 2019, a Sociedade Brasileira de Hepatologia (SBH) em colaboração com o Núcleo Brasileiro para Estudo do Helicobacter pylori e Microbiota (NBEHPM) e a Federação Brasileira de Gastroenterologia (FBG) realizaram um encontro exclusivamente voltado para a discussão sobre microbiota e uso de prebióticos, probióticos e simbióticos em doenças hepáticas e gastrointestinais. Este texto resume os principais pontos discutidos durante o evento, e tem a intenção de fornecer informações práticas sobre o assunto, abordando as descobertas mais recentes e indicando áreas para estudos futuros.

ABSTRACT Over the last years, there is growing evidence that microorganisms are involved in the maintenance of our health and are related to various diseases, both intestinal and extraintestinal. Changes in the gut microbiota appears to be a key element in the pathogenesis of hepatic and gastrointestinal disorders, including non-alcoholic fatty liver disease, alcoholic liver disease, liver cirrhosis, inflammatory bowel disease, irritable bowel syndrome, and Clostridium difficile - associated diarrhea. In 2019, the Brazilian Society of Hepatology (SBH) in cooperation with the Brazilian Nucleus for the Study of Helicobacter Pylori and Microbiota (NBEHPM), and Brazilian Federation of Gastroenterology (FBG) sponsored a joint meeting on gut microbiota and the use of prebiotics, probiotics, and synbiotics in gastrointestinal and liver diseases. This paper summarizes the proceedings of the aforementioned meeting. It is intended to provide practical information about this topic, addressing the latest discoveries and indicating areas for future studies.

https://doi.org/10.1590/s0004-2803.202000000-72 2240 downloads

Letters to the Editor
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Caixeta, Leonardo Ferreira

; Borges, Saulo Queiroz

; Corrêa, Thiago Xavier

; Trindade, Isabela Oliveira Azevedo

; Amorim, Rivadávio Fernandes Batista

; Toledo, Maria Alice de Vilhena

Dementia & Neuropsychologia

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mar 2020, Volume 14 N. 1 Pages 88 - 90

Abstract: En | Text: En | PDF: En

https://doi.org/10.1590/1980-57642020dn14-010015 267 downloads

10.

RECOMMENDATIONS FOR INVASIVE PROCEDURES IN PATIENTS WITH DISEASES OF THE LIVER AND BILIARY TRACT: REPORT OF A JOINT MEETING OF THE BRAZILIAN SOCIETY OF HEPATOLOGY (SBH), BRAZILIAN SOCIETY OF DIGESTIVE ENDOSCOPY (SOBED) AND BRAZILIAN SOCIETY OF INTERVENTIONAL RADIOLOGY AND ENDOVASCULAR SURGERY (SOBRICE)
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SCHIAVON, Leonardo de Lucca

; EJIMA, Flávio Hayato

; MENEZES, Marcos Roberto de

; BITTENCOURT, Paulo Lisboa

; MOREIRA, Aírton Mota

; FARIAS, Alberto Queiroz

; CHAGAS, Aline Lopes

; ASSIS, André Moreira de

; MATTOS, Ângelo Zambam de

; SALOMÃO, Bruno Chaves

; TERRA, Carlos

; MARTINS, Fernanda Prata Borges

; CARNEVALE, Francisco Cesar

; REZENDE, Guilherme Ferreira da Motta

; PAULO, Gustavo Andrade de

; PEREIRA, Gustavo Henrique Santos

; MOTTA-LEAL-FILHO, Joaquim Maurício da

; MENESES, Juliana de

; COSTA, Lucas Santana Nova da

; CARNEIRO, Marcos de Vasconcelos

; ÁLVARES-DA-SILVA, Mário Reis

; SOARES, Mayra Veloso Ayrimoraes

; PEREIRA, Osvaldo Ignácio

; XIMENES, Rafael Oliveira

; DURANTE, Renata Filardi Simiqueli

; FERREIRA, Valério Alves

; LIMA, Vinícius Machado de

Arquivos de Gastroenterologia

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jun 2019, Volume 56 N. 2 Pages 213 - 231

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO As doenças do fígado e das vias biliares são causas comuns de morbidade e mortalidade. Procedimentos invasivos com finalidade diagnóstica e terapêutica são frequentemente recomendados nos casos de doenças hepatobiliares. O reconhecimento das indicações e limitações das técnicas comumente empregadas é crucial para uma adequada seleção dos pacientes, maximizando os resultados positivos e reduzindo o risco de complicações. Em 2018, a Sociedade Brasileira de Hepatologia (SBH), em colaboração com a Sociedade Brasileira de Radiologia Intervencionista e Cirurgia Endovascular (SOBRICE) e a Sociedade Brasileira de Endoscopia Digestiva (SOBED) realizaram um encontro exclusivamente voltado para a discussão dos procedimentos invasivos nas doenças hepatobiliares. Este texto resume as principais recomendações discutidas durante o evento, e tem a intenção de auxiliar clínicos, gastroenterologistas, hepatologistas, radiologistas e endoscopistas no uso adequado dos procedimentos invasivos para manejo de pacientes com doenças hepatobiliares.

ABSTRACT Liver and biliary tract diseases are common causes of morbidity and mortality worldwide. Invasive procedures are usually performed in those patients with hepatobiliary diseases for both diagnostic and therapeutic purposes. Defining proper indications and restraints of commonly used techniques is crucial for proper patient selection, maximizing positive results and limiting complications. In 2018, the Brazilian Society of Hepatology (SBH) in cooperation with the Brazilian Society of Interventional Radiology and Endovascular surgery (SOBRICE) and the Brazilian Society of Digestive Endoscopy (SOBED) sponsored a joint single-topic meeting on invasive procedures in patients with hepatobiliary diseases. This paper summarizes the proceedings of the aforementioned meeting. It is intended to guide clinicians, gastroenterologists, hepatologists, radiologists, and endoscopists for the proper use of invasive procedures for management of patients with hepatobiliary diseases.

https://doi.org/10.1590/s0004-2803.201900000-42 2181 downloads

11.

Risk assessment of the occurrence of aflatoxin and fungi in peanuts and cashew nuts
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Kujbida, Paula

; Maia, Patrícia Penido

; Araújo, Ariadne Naama de

; Mendes, Leonardo Daniel

; Oliveira, Mariana Lepri de

; Silva-Rocha, Walicyranison Plinio

; Brito, George Queiroz de

; Chaves, Guilherme Maranhão

; Martins, Isarita

Brazilian Journal of Pharmaceutical Sciences

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2019, Volume 55 elocation e18135

Abstract: En | Text: En | PDF: En

In the present study, the occurrence of fungi and aflatoxins (AFs) in peanut and cashew nut samples was investigated. Mycological analysis revealed the presence of fungi in 58.8% of samples, and assessment of AFs by chromatographic methods revealed that 52.9% were contaminated by AFs. AFB1 was the principal component in all AF-contaminated samples, with a mean level of 14.0, and 1.08 µg/kg in peanut and cashew nut, respectively. Eleven samples (32.4%) exceeded the total AF maximum level (4 μg/kg) and 8 samples (23.5%) exceeded the AFB1 (2 μg/kg) established by the European Commission. Our findings suggest that the incidence of AFs emphasizes the need for regular monitoring and a more stringent food safety system to control AFs at the lowest possible levels in peanuts and cashew nuts. The hypothetical dietary exposure suggests that the food products evaluated may significantly contribute to the overall human exposure.

https://doi.org/10.1590/s2175-97902019000118135 2576 downloads

12.

The role of historical and ecological factors on initial survival of Copaifera langsdorffii Desf. (Fabaceae)
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Fagundes, Marcílio

; Costa, Fernanda Vieira da

; Antunes, Suélen Ferreira

; Maia, Maria Luiza Bicalho

; Queiroz, Antônio César Medeiros de

; Oliveira, Leonardo Queiroz

; Faria, Maurício Lopes de

Acta Botanica Brasilica

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dec 2013, Volume 27 N. 4 Pages 680 - 687

Abstract: En | Text: En | PDF: En

The plant population dynamic is affected by ecological and evolutionary processes that operate at all stages of the plant life cycle. The aim of this study was to characterize the seed and seedling performance of Copaifera langsdorffii by testing four hypotheses: the resource concentration hypothesis; the relationship between seed size and germinability hypothesis; the relationship between seed size and seedling vigor hypothesis; and the intraspecific seedling competition hypothesis. All seeds used in the experiments were collected from 35 C. langsdorffii plants located in a fragment of the Brazilian cerrado (savanna). The number of fruits per plant negatively affected Rhinochenus brevicollis attacks on C. langsdorffii seeds. Therefore, this result does not support the resource concentration hypothesis, and predator satiation was used in order to explain the observed result. In general, seed germinability (percentage and time to emergence) was not influenced by seed size. The homogeneity of the experimental design, together with an abundant water supply, may have masked the effects of seed size on germinability. Seed size positively affected seedling development, corroborating the expected relationship between seed size and seedling vigor. The number of seedling per plastic bags negatively affected the growth of C. langsdorffii. The nutrient-limited soil probably promoted the below-ground competition for nutrients among seedlings. Finally, the role of evolutionary and ecological factors on C. langsdorffii population dynamics is discussed.

https://doi.org/10.1590/S0102-33062013000400005 1995 downloads Cited 4 times in SciELO

13.

Hemangiomas hepáticos: aspectos ultra-sonográficos e clínicos
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Machado, Márcio Martins

; Rosa, Ana Cláudia Ferreira

; Lemes, Marcella Stival

; Mota, Orlando Milhomem da

; Silva, Osterno Queiroz da

; Campoli, Paulo Moacir de Oliveira

; Santana Filho, Jales Benevides

; Barreto, Paulo Adriano

; Nunes, Rodrigo Alvarenga

; Barreto, Mariana Caetano

; Milhomem, Patrícia Medeiros

; Milhomem, Leonardo Medeiros

; Oliveira, Gustavo Barboza de

; Oliveira, Fernanda Barboza de

; Castro, Félix Cristiano Ferreira de

; Brito, Alexandre Menezes de

; Barros, Nestor de

; Cerri, Giovanni Guido

Radiologia Brasileira

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dec 2006, Volume 39 N. 6 Pages 441 - 446

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Os hemangiomas são os tumores hepáticos benignos mais comuns, ocorrem em todos os grupos etários, sendo mais comuns nos adultos. Na grande maioria dos casos os hemangiomas são pequenos, assintomáticos e descobertos incidentalmente. Lesões maiores eventualmente podem produzir sintomas. O aspecto ultra-sonográfico desses tumores varia, sendo que o aspecto usual é o de lesão pequena hiperecogênica bem definida. Neste artigo, os autores fazem uma revisão sobre aspectos clínicos e ultra-sonográficos dos hemangiomas, ressaltando a importância desses aspectos na condução clínica dos pacientes acometidos.

Hemangiomas are the most common benign tumors of the liver, occurring in all age groups, and more frequently in adults. The vast majority of hemangiomas are small, asymptomatic, and are incidentally discovered. Larger lesions may eventually produce symptoms. The sonographic aspect of these tumors varies, the lesions being typically small, well defined and hyperechoic. In this study the authors review clinical and sonographic features of hemangiomas, highlighting the clinical significance of such features to be taken into consideration in the treatment of affected patients.

103176 downloads Cited 4 times in SciELO

14.

Avaliação dos tumores hepáticos ao Doppler
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Machado, Márcio Martins

; Rosa, Ana Cláudia Ferreira

; Herman, Paulo

; Barros, Nestor de

; Mota, Orlando Milhomem da

; Azeredo, Letícia Martins

; Silva, Osterno Queiroz da

; Santana Filho, Jales Benevides

; Campoli, Paulo Moacir O.

; Barreto, Paulo Adriano Q.

; Milhomem, Patrícia Medeiros

; Milhomem, Leonardo Medeiros

; Daher, Murilo Tavares

; Daher, Renato Tavares

; Cerri, Luciana Mendes de Oliveira

; Saad, William Abrão

; Cerri, Giovanni Guido

Radiologia Brasileira

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oct 2004, Volume 37 N. 5 Pages 371 - 376

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Os avanços recentes na ultra-sonografia têm ampliado a possibilidade de detecção de tumores hepáticos. Isto tem auxiliado na perspectiva de melhora do prognóstico destes pacientes, à medida que novas técnicas terapêuticas têm surgido. Neste artigo os autores relatam achados ao Doppler que podem auxiliar na identificação e caracterização dos tumores hepáticos, avaliando dados do Doppler colorido, pulsado e do Doppler de amplitude ("power Doppler"). Fazem, também, referência a novas modalidades de imagem, como o uso da harmônica.

Recent advances in ultrasound have optimized the detection of liver tumors and helped to improve the prognosis of patients with this condition as newly developed and improved therapeutic modalities have been established. The authors review important Doppler findings which may help in the identification and characterization of some hepatic tumors through the evaluation of color Doppler, pulsed Doppler and power Doppler features. New imaging methods such as the use of harmonics imaging are also reviewed.

6631 downloads Cited 2 times in SciELO

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