AVALIAÇÃO DE LINGUIÇAS DE TILÁPIAS DO NILO (Oreochromis niloticus)SUBMETIDAS A DIFERENTES MÉTODOS DE DEFUMAÇÃO

Uma forma de diversificar e estimular o consumo de peixes no Brasil pode ocorrer com a elaboração de produtos inovadores como as linguiças defumadas. Portanto, o objetivo do presente estudo foi avaliar aspectos nutricionais (proteína bruta, gordura, umidade e cinzas), físicas (perda de peso e encolhimento, capacidade de retenção de água, textura e cor instrumental e pH), química (atividade de água) e bacteriológicas(Escherichia coli, Salmonellaspp., Staphylococcus coagulase positiva ebactérias aeróbias psicrotróficas) de linguiças de filés de tilápias do Nilo submetidas a defumação tradicional e líquida. As linguiças submetidas a defumação líquida apresentaram maior percentual proteico, maior valor de L* (luminosidade), menor valor de a*(vermelho) e b* (amarelo) porém com maior perda de peso durante o processamento e menor capacidade de retenção de água. Os teores de umidade, gordura, cinzas, porcentagem de encolhimento, textura instrumental, pH, atividade de água e análises bacteriológicas não foram influenciadas por ambos os métodos de defumação aplicados.Portanto, a defumação líquida causamelhora nos percentuais de proteínas, pouca variação nos aspectos físicos, químicos e bacteriológicos de linguiças elaboradas com filés de tilápias do Nilo em relação ao método tradicional, além de apresentar maior facilidade de execução, menor poluição ambiental, mais fácil limpeza após o processamento e menor possibilidade de deposição de compostos químicos cancerígenos, sendo um potencial substituto do método tradicional de defumação de linguiças de tilápias do Nil

SUBSTITUIÇÃO DE FONTE DE AMIDO POR FIBRA SOLÚVEL EM DETERGENTE NEUTRO NA DIETA DE VACAS

Conduziu-se este trabalho com o objetivo de avaliar os efeitos da substituição do milho por polpa cítrica sobre o desempenho de vacas leiteiras. Utilizaram-se nove vacas (três canuladas no rúmen) da raça Holandesa, pluríparas, com 80 ± 24 dias de lactação e produção média diária de 20 ± 0,58 kg de leite. Os animais foram confinados em tie stall, com cocho e bebedouro individuais. Utilizou-se um quadrado latino 3 x 3. Os períodos experimentais tiveram duração de 21 dias, sendo 14 de adaptação e sete de coleta. Os tratamentos foram constituídos de 100% milho grão (MG), 50% milho grão e 50% polpa cítrica (MP) e 100% polpa cítrica (PC). Não houve diferenças significativas na ingestão dos nutrientes (MS, MO, FDN, FDA, PB, amido) entre dietas. O tratamento com polpa cítrica produziu maior proporção de acetato em relação aos demais, bem como maior relação acetato/propionato. As médias de pH situaram-se entre 5,86 e 7,35. As médias de N-NH3 apresentaram maiores diferenças nos tempos 2 e 3 horas pós-alimentação. Não houve diferenças entre as dietas para produção total de leite corrigido para 4% de gordura, proteína, lactose, extrato seco total (EST) e nitrogênio uréico do leite (NUL). Palavras-chave: ingestão de nutrientes; milho grão; polpa cítrica; vacas leiteiras

The chick embryo chorioallantoic membrane assay as a model for the study of angiogenesis

Angiogenesis is a fundamental physiological process with strong implications in tissue homeostasis. Animal models helping to identify how angiogenesis is regulated are fundamental to answer many biological questions. Chick embryo chorioallantoic membrane (CAM) assay is one of the most employed methods to study angiogenesis. In this study we applied a scientometric approach to evaluate the employment of CAM assay in published articles. Temporal trends indicated that CAM assay was the preferred method to investigate angiogenesis over time. The publications had a significant number of citations and the impact factor of journals publishing articles is relevant for the scientific community. A total of 52 different research areas have articles published using this particular technique. Oncology is the research field in which CAM assay was mostly used. Accordingly, tumor-derived cell lines were the most frequent sample tested on CAM. We also identified that 73,6% of articles published used only CAM assay to answer questions concerning angiogenesis. We concluded that although the CAM assay is a classical approach, that does not need so much infrastructure and financial support to be performed, it is a well-accepted technique by the scientific community. In addition, this methodology has gain attention in scientific community because no pain is experienced by the chick and they are minor ethical concerns to employ this method. Moreover, this data can help researchers who are unfamiliar with the CAM assay to identify if this particular method is suitable for their research

Prevalência de Talassemia Alfa em População com Microcítose e Hipocromia

Resumo: a anemia ferropênica, anemia das doenças crônicas, talassemias (alfa e beta) e associações com as hemoglobinas variantes constituem importante causas de anemias microcíticas e hipocrômicas. A talassemia alfa é uma síndrome que envolve genes produtores de globina alfa e representa um grave problema de saúde global. O objetivo do presente estudo foi determinar a prevalência de talassemia alfa como causa de anemia microcítica e hipocrômica, utilizando-se os métodos laboratoriais clássicos de diagnóstico. Palavras-chave: Hemoglobinopatia. Talassemia. Microcitose. Hipocromia. Goiás

EFICIÃ?NCIA DO MÃ?TODO DE ESPECTROMETRIA DE MASSAS EM DROGAS DE ABUSO

Resumo: com objetivo demonstrar o papel da Espectrometria de Massas como ferramenta à identificação de várias drogas e destacar seus principais efeitos no organismo humano, realizamos uma revisão, por meio de bases de dados online, periódicos científicos e livros, analisando publicações dos últimos 10 anos. Foi alvo deste estudo drogas como cocaína, ecstasy, LSD, maconha e crack. A Espectrometria de Massas é uma técnica fundamental para os testes preliminares de triagem de drogas e essencial para a caracterização destas moléculas. Palavras-chave: Espectrometria de massa. Drogas de abuso. Química Forense

Optical Properties And Antiangiogenic Activity Of A Chalcone Derivate

Chalcones and their derivatives exhibit numerous pharmacological activities such as antibacterial, antifungal, cytotoxic, antinociceptive and anti-inflammatory. Recently, they have been assessed aiming for novel application in nonlinear optics and in the treatment of immune diseases and cancers. In this study, we investigate the optical properties of synthetic chalcona 1E,4E-1-(4-chlorophenyl)-5-(2,6,6-trimethylcyclohexen-1-yl)penta-1,4-dien-3-one (CAB7β) and its antiangiogenic potential using the chorioallantoic membrane (CAM) with the S180 sarcoma cell line. Experimental and theoretical results show intense absorption in the UVA-UVC region, which is associated with a π → π* transition with intramolecular charge transfer from the trimethyl-cyclohexen-1-yl ring to the chlorophenyl ring. Quantum chemical calculations of the first hyperpolarizability, accounting for both solvent and frequency dispersion effects, are in very good concordance with hyper-Rayleigh scattering measurements. In addition, two-photon absorption allowed band centered at 650 nm was observed. Concerning antiangiogenic activity, CAB7β causes a significant reduction in the total number, junctions, length and caliber of blood vessels stimulated by S180 cells reducing the presence of blood vessels, inflammatory cells and others elements related to angiogenic process. It is found that CAB7β is a versatile compound and a promising candidate for linear and nonlinear optical applications, in therapy against sarcoma and phototherapy

A survey of fertility preservation options available to cancer patients around the globe

Purpose: Oncofertility focuses on providing fertility and endocrine-sparing options to patients who undergo life-preserving but gonadotoxic cancer treatment. The resources needed to meet patient demand often are fragmented along disciplinary lines. We quantify assets and gaps in oncofertility care on a global scale. Methods: Survey-based questionnaires were provided to 191 members of the Oncofertility Consortium Global Partners Network, a National Institutes of Health–funded organization. Responses were analyzed to measure trends and regional subtleties about patient oncofertility experiences and to analyze barriers to care at sites that provide oncofertility services. Results: Sixty-three responses were received (response rate, 25%), and 40 were analyzed from oncofertility centers in 28 countries. Thirty of 40 survey results (75%) showed that formal referral processes and psychological care are provided to patients at the majority of sites. Fourteen of 23 respondents (61%) stated that some fertility preservation services are not offered because of cultural and legal barriers. The growth of oncofertility and its capacity to improve the lives of cancer survivors around the globe relies on concentrated efforts to increase awareness, promote collaboration, share best practices, and advocate for research funding. Conclusion: This survey reveals global and regional successes and challenges and provides insight into what is needed to advance the field and make the discussion of fertility preservation and endocrine health a standard component of the cancer treatment plan. As the field of oncofertility continues to develop around the globe, regular assessment of both international and regional barriers to quality care must continue to guide process improvements

Survey of Third-Party Parenting Options Associated With Fertility Preservation Available to Patients With Cancer Around the Globe

Purpose: In the accompanying article, “Analysis of Fertility Preservation Options Available to Patients With Cancer Around the Globe,” we showed that specific fertility preservation services may not be offered at various sites around the world because of cultural and legal barriers. We assessed global and regional experiences as well as the legal status of third-party reproduction and adoption to serve as a comprehensive international data set and resource for groups that wish to begin oncofertility interventions. Methods: We provide data on the legalities of third-party assisted reproductive technologies and other family-building options in the 28 oncofertility-practicing countries surveyed. Results: We found regional and country differences that will be important in the development of tailored resources for physicians and for patient brochures that are sensitive to these local restrictions and cultural norms. Conclusion: Because many patients first consult Web-based materials, the formal assessment of the availability of these options provides members of the global oncofertility community with data to which they might otherwise not have ready access to better serve their patients