ABSTRACT In Brazil, all transport and storage of native forest products and by-products must be registered within the DOF (Document of Forestry Origin) system. This computerized platform exists to support control agencies in reducing the sale of forest products obtained illegally. However, this tool still shows only modest results in fulfilling its objectives, since gaps in the system allow illegal wood to be acquired and enter the system as legal wood. The objective of this study was to test whether the volumetric yield coefficient (CRV) of a sawmill on an industrial scale corresponds to the 35% established by Brazilian legislation. The focus was directed at a loophole that allows the accumulation of virtual credits in the DOF system by turning logs into lumber. For this purpose, we estimated the sawmill’s CRV and mean percentage yield of 19 commercial species used by a timber company in the Brazilian Amazon with a sample size of 90 logs. The estimated CRV was 24.6 ± 2.4, showing 9.9% uncertainty. The mean CRV differed highly significantly (p < 0.001) from that proposed by the DOF, with a 10.35% difference. Based on these results, the difference between the observed yield and that proposed by the legislation can generate the accumulation of virtual log credits. With this accumulation, managers encounter difficulties in acquiring new logging permits and, consequently, do not meet the actual demand for logs to the sawmill’s capacity.

RESUMO No Brasil, todo transporte e armazenamento de produtos e subprodutos florestais nativos deve ser registrado no sistema DOF (Documento de Origem Florestal). Essa plataforma informatizada existe para apoiar agências de controle na redução da venda de produtos florestais obtidos ilegalmente. No entanto, essa ferramenta ainda apresenta resultados modestos no cumprimento de seus objetivos, uma vez que lacunas no sistema permitem que madeira ilegal adquira caráter legal. O objetivo desse estudo foi testar se o coeficiente de rendimento volumétrico (CRV) de uma serraria em escala empresarial corresponde aos 35% estabelecidos pela legislação brasileira. O foco foi direcionado para uma brecha que permite o acúmulo de créditos virtuais no sistema DOF, por meio da transformação de toras em material serrado. Para tanto, estimamos o CRV da serraria e os rendimentos percentuais médios de 19 espécies comercializadas por uma empresa de base florestal na Amazônia brasileira, com um esforço amostral de 90 toras. O CRV estimado foi de 24,6 ± 2,4, mostrando incerteza de 9,9%. O CRV médio diferiu altamente significativamente (p < 0,001) do proposto pelo DOF, com uma diferença de 10,35%. Com base nesses resultados, a diferença entre o rendimento observado e o proposto pela legislação pode gerar um acúmulo de créditos em toras virtuais. Com esse acúmulo, os gestores enfrentam dificuldades para adquirir novas licenças de exploração e, consequentemente, não atendem à real demanda por toras da capacidade instalada de sua serraria.

RESUMO Esta pesquisa do tipo exploratória descritiva objetivou analisar a execução do Programa Saúde na Escola (PSE) no Distrito Federal, no período anterior e durante a pandemia da Covid-19. Os dados foram produzidos de fevereiro a abril de 2022 mediante pesquisa documental e aplicação de questionário on-line a profissionais das equipes de Atenção Primária à Saúde (APS), no âmbito do Programa de Qualificação da Atenção Primária do Distrito Federal (QualisAPS). Foram acessados os bancos de dados do Instituto Nacional de Estudos e Pesquisas Educacionais Anísio Teixeira, do Sistema de Informação para a Atenção Básica e da Plataforma QualisAPS sobre as ações desenvolvidas de 2018 a 2021, a estruturação do programa e a sua inclusão nos planos de ação das equipes de saúde da família e saúde bucal. Por meio de estatística descritiva e análise de conteúdo, evidenciaram-se ampliação da adesão das escolas ao Programa e predominância de registros referentes à temática saúde bucal e verificação vacinal nos dois períodos, mas com redução quantitativa em decorrência da pandemia. A realidade do Distrito Federal desvela que a inter-relação do PSE com a APS e o apoio do QualisAPS favorecem um processo contínuo de planejamento trazendo perspectivas de fortalecimento das ações.

ABSTRACT This exploratory descriptive research aims to analyze the implementation of the School Health Program in the Federal District, in the period before and during the COVID-19 pandemic. The data were produced from February to April 2022 through documentary research and application of an online questionnaire with professionals from the Primary Health Care (PHC) teams within the scope of the Primary Care Qualification Program of the Federal District-QualisAPS. The databases of the National Institute of Educational Studies and Research Anísio Teixeira, the Information System for Primary Care and the QualisAPS Platform were accessed on the actions developed from 2018 to 202, the structuring of the program, and its inclusion in the action plans of family health and oral health teams. Through descriptive statistics and content analysis it was evident an increase in the adhesion of schools to the PSE and a predominance of records related to oral health and vaccine verification, in both periods, with quantitative reduction due the pandemic period. The reality of the Federal District reveals that the interrelation of the Program with PHC and the support of QualisAPS enable a continuous planning process, bringing prospects for strengthening the actions.

ABSTRACT This exploratory descriptive research aims to analyze the implementation of the School Health Program in the Federal District, in the period before and during the COVID-19 pandemic. The data were produced from February to April 2022 through documentary research and application of an online questionnaire with professionals from the Primary Health Care (PHC) teams within the scope of the Primary Care Qualification Program of the Federal District-QualisAPS. The databases of the National Institute of Educational Studies and Research Anísio Teixeira, the Information System for Primary Care and the QualisAPS Platform were accessed on the actions developed from 2018 to 202, the structuring of the program, and its inclusion in the action plans of family health and oral health teams. Through descriptive statistics and content analysis it was evident an increase in the adhesion of schools to the PSE and a predominance of records related to oral health and vaccine verification, in both periods, with quantitative reduction due the pandemic period. The reality of the Federal District reveals that the interrelation of the Program with PHC and the support of QualisAPS enable a continuous planning process, bringing prospects for strengthening the actions.

RESUMO Esta pesquisa do tipo exploratória descritiva objetivou analisar a execução do Programa Saúde na Escola (PSE) no Distrito Federal, no período anterior e durante a pandemia da Covid-19. Os dados foram produzidos de fevereiro a abril de 2022 mediante pesquisa documental e aplicação de questionário on-line a profissionais das equipes de Atenção Primária à Saúde (APS), no âmbito do Programa de Qualificação da Atenção Primária do Distrito Federal (QualisAPS). Foram acessados os bancos de dados do Instituto Nacional de Estudos e Pesquisas Educacionais Anísio Teixeira, do Sistema de Informação para a Atenção Básica e da Plataforma QualisAPS sobre as ações desenvolvidas de 2018 a 2021, a estruturação do programa e a sua inclusão nos planos de ação das equipes de saúde da família e saúde bucal. Por meio de estatística descritiva e análise de conteúdo, evidenciaram-se ampliação da adesão das escolas ao Programa e predominância de registros referentes à temática saúde bucal e verificação vacinal nos dois períodos, mas com redução quantitativa em decorrência da pandemia. A realidade do Distrito Federal desvela que a inter-relação do PSE com a APS e o apoio do QualisAPS favorecem um processo contínuo de planejamento trazendo perspectivas de fortalecimento das ações.

Abstract: This cross-sectional study aimed to determine the seroprevalence of SARS-CoV-2 infection among Brazilian dentists and its associated factors. Stratified random sampling of dentists from 33 administrative regions of the Federal District (Brazil) was performed. The presence of antibodies was verified by the OnSite COVID-19 IgG/IgM Rapid Test. Participants answered a survey about sociodemographic characteristics, exposure to COVID-19, and professional practice. A chi-square test was performed between serostatus and exposure variables. Mann-Whitney tests were carried out for quantitative variables. Odds ratio (OR) and 95% confidence intervals (95%CI) were calculated. A series of binomial logistic regression models was performed. The seroprevalence of SARS-CoV-2 infection among 324 selected dentists was 19.1%. There was a statistically significant association between seropositivity and previous confirmed diagnosis of COVID-19, loss of taste or smell, diagnosis of COVID-19 in a household member, and treatment of a patient with fever. Dentists with a previous confirmed diagnosis of COVID-19 had 29.5 [12.7–68.4] higher odds to exhibit positive serology test results. Dentists with confirmed diagnosis of COVID-19 in a household member had 2.5 [1.1–5.3] times higher odds to exhibit positive serology test results. Professionals with loss of taste or smell in the last 15 days had 5.24 [1.1–24.1] times higher odds to exhibit positive serology test results, and, for those who had treated patients with fever, there were 2.99 [1.03–8.7] times higher odds to exhibit negative serology test results. There was a similar prevalence rate of infection among dentists and in the general population. Nevertheless, this finding applies to the epidemiological situation in 2020, before the development of vaccines and the emergence of SARS-CoV-2 Delta variant.

Resumo Trata-se de estudo transversal, com o objetivo de analisar a satisfação de usuários em relação ao atendimento em unidades de Atenção Primária à Saúde do Distrito Federal e fatores associados. Foram incluídos 4.476 usuários das 62 equipes da ESF existentes na Região de Saúde Leste; utilizou-se questionário testado previamente com perguntas abertas e fechadas. Quanto ao nível geral de satisfação, encontrou-se 54,9% dos usuários Satisfeitos e 23,0% Muito Satisfeitos. Para este desfecho Nível Geral de Satisfação houve menor satisfação nos casos que o usuário não conseguiu ser atendido (OR 12,1 p=0,01); não recebeu visita domiciliar (OR 1,7 p=0,01); é do sexo feminino (OR 1,2 p=0,01) e declarou cor/etnia não branco (OR 0,77 p=0,021). Já a “Chance do Usuário Recomendar a UBS” foi: Alta (43,4%) e Muito Alta (17,7%). De modo similar, a menor chance de recomendar foi associada a casos de não atendimento (OR 5,1 p=0,01) e ausência de visita domiciliar (OR 1,5 p=0,01); não houve associação com variáveis sociodemográficas. Evidencia-se a percepção que os serviços são satisfatórios para a maioria dos usuários. O estudo também trouxe evidências para a importância de contar com a equipe ESF completa e de expandir a visita domiciliar.

Abstract The aim of this cross-sectional study was to analyze user satisfaction in relation to Primary Health Care services in the Federal District and its associated factors. A total of 4,476 users of the 62 existing Family Health Strategy Teams from the Eastern Health Region were included; a pre-tested questionnaire with open and closed questions was applied. As for the “General Satisfaction Level” 54.9% of users were Satisfied and 23.0% Very Satisfied. For this outcome there was less satisfaction in cases that the user didn´t receive the care he sought for (OR 12.1 p=0.01); did not receive a home visit (OR 1.7 p=0.01); is female (OR 1.2 p=0.01) and declared to be non-white (OR 0.77 p=0.021). The “Chance to recommend the Health Unit” was: High (43.4%) and Very High (17.7%). Similarly, the lower chance to recommend was associated with no care received (OR 5.1 p=0.01) and absence of home visit (OR 1.5 p=0.01); there was no association with sociodemographic variables. Evidence showed that health services are satisfactory for most users. The study provides evidence regarding the importance of having the complete Family Health Strategy team and of expanding home visit.

Resumo Trata-se de estudo transversal, com o objetivo de analisar a satisfação de usuários em relação ao atendimento em unidades de Atenção Primária à Saúde do Distrito Federal e fatores associados. Foram incluídos 4.476 usuários das 62 equipes da ESF existentes na Região de Saúde Leste; utilizou-se questionário testado previamente com perguntas abertas e fechadas. Quanto ao nível geral de satisfação, encontrou-se 54,9% dos usuários Satisfeitos e 23,0% Muito Satisfeitos. Para este desfecho Nível Geral de Satisfação houve menor satisfação nos casos que o usuário não conseguiu ser atendido (OR 12,1 p=0,01); não recebeu visita domiciliar (OR 1,7 p=0,01); é do sexo feminino (OR 1,2 p=0,01) e declarou cor/etnia não branco (OR 0,77 p=0,021). Já a “Chance do Usuário Recomendar a UBS” foi: Alta (43,4%) e Muito Alta (17,7%). De modo similar, a menor chance de recomendar foi associada a casos de não atendimento (OR 5,1 p=0,01) e ausência de visita domiciliar (OR 1,5 p=0,01); não houve associação com variáveis sociodemográficas. Evidencia-se a percepção que os serviços são satisfatórios para a maioria dos usuários. O estudo também trouxe evidências para a importância de contar com a equipe ESF completa e de expandir a visita domiciliar.

Abstract The aim of this cross-sectional study was to analyze user satisfaction in relation to Primary Health Care services in the Federal District and its associated factors. A total of 4,476 users of the 62 existing Family Health Strategy Teams from the Eastern Health Region were included; a pre-tested questionnaire with open and closed questions was applied. As for the “General Satisfaction Level” 54.9% of users were Satisfied and 23.0% Very Satisfied. For this outcome there was less satisfaction in cases that the user didn´t receive the care he sought for (OR 12.1 p=0.01); did not receive a home visit (OR 1.7 p=0.01); is female (OR 1.2 p=0.01) and declared to be non-white (OR 0.77 p=0.021). The “Chance to recommend the Health Unit” was: High (43.4%) and Very High (17.7%). Similarly, the lower chance to recommend was associated with no care received (OR 5.1 p=0.01) and absence of home visit (OR 1.5 p=0.01); there was no association with sociodemographic variables. Evidence showed that health services are satisfactory for most users. The study provides evidence regarding the importance of having the complete Family Health Strategy team and of expanding home visit.

Resumo O efeito nematicida de diferentes materiais orgânicos foi avaliado, com o objetivo de desenvolver um tratamento alternativo não químico do solo para o controle dos estágios de vida livre de nematoides gastrintestinais de pequenos ruminantes. Os materiais orgânicos selecionados foram resíduos da indústria de suco de acerola, caju, uva, goiaba, mamão e abacaxi, além do resíduo de mamona da indústria de biodiesel. Os resultados da LC90 mostraram que o resíduo de abacaxi foi o mais eficiente inibidor do desenvolvimento larval, seguido pela mamona, uva, caju, acerola, goiaba e mamão. O resíduo de mamona também se mostrou uma boa fonte de nitrogênio, sendo usado em experimento em casa de vegetação para prevenir o desenvolvimento larval em fezes contaminadas, depositadas em vasos, contendo as gramíneas Brachiaria brizantha (var. Paiaguás) ou Megathyrsus maximus x M. infestum (var. Massai). O resíduo de mamona reduziu (85,04%) significativamente (P < 0,05) a contaminação no capim-Paiaguás (L3.dry massa-1), 17,35% no capim Massai (P> 0,05), e aumentou a produção de biomassa das gramíneas Massai (251,43%, P <0,05) e Paiaguás (109,19%, P> 0,05). Essa estratégia, chamada Econemat®, com bons resultados in vitro, mostra-se promissora nas pastagens aumentando a produção de fitomassa.

Abstract The nematicidal effect of different organic materials was evaluated in order to develop a non-chemical alternative soil treatment for control of the free-living stages of small ruminant gastrointestinal nematodes. The selected organic materials were residues from the juice industry of acerola, cashew, grape, guava, papaya and pineapple, as well as castor residue from the biodiesel industry. LC90 results showed that pineapple residue was the most efficient inhibitor of larval development, followed by castor, grape, cashew, acerola, guava and papaya. Castor residue was also a good source of nitrogen and was used in a greenhouse experiment to prevent larval development in contaminated goat faeces that was deposited in pots containing the grasses Brachiaria brizantha (var. Paiaguás) or Megathyrsus maximus x M. infestum (var. Massai). Castor residue caused a significant (P < 0.05) reduction (85.04%) in Paiaguás grass contamination (L3.dry mass-1) and a reduction of 17.35% in Massai grass contamination (P > 0.05), with an increase in the biomass production of Massai (251.43%, P < 0.05) and Paiaguás (109.19%, P > 0.05) grasses. This strategy, called Econemat®, with good results in vitro shows to be promising on pasture increasing phytomass production.

Abstract Objective: The goal of the present study was to compare the myocardial protection obtained with histidine-tryptophan-ketoglutarate (HTK) cardioplegic solution (Custodiol®) and with intermittent hypothermic blood solution. Methods: Two homogenous groups of 25 children with acyanotic congenital heart disease who underwent total correction with mean aortic clamping time of 60 minutes were evaluated in this randomized study. Troponin and creatine kinase-MB curves, vasoactive-inotropic score, and left ventricular function were obtained by echocardiogram in each group. The values were correlated and presented through graphs and tables after adequate statistical treatment. Results: It was observed that values of all the studied variables varied over time, but there was no difference between the groups. Conclusion: We conclude that in patients with acyanotic congenital cardiopathies submitted to total surgical correction, mean aortic clamping time around one hour, and cardiopulmonary bypass with moderate hypothermia, the HTK crystalloid cardioplegic solution offers the same myocardial protection as the cold-blood hyperkalemic cardioplegic solution analyzed, according to the variables considered in our study model.

ABSTRACT Buttresses and other natural structures modify the shape of stems in Amazonia and change the diameter at breast height (DBH) measured at 1.3 m at ground level. The lack of adequate measurement techniques affects negatively forest dynamics analyses and biomass estimating. The study evaluated an indirect method of measuring diameters in trees with DBH > 40 cm using principles of digital photogrammetry. The results obtained with two cameras (smartphone and Sony) were compared with direct measurements using diametric tape and a ladder. The technique is adequate to measure the diameters of trees with measurement point above 2 m of ground, with a confidence interval of ±1cm. The use of photogrammetry as a supplementary tool to the diametric tape (IC ± 0.24 cm) is recommended, helping to measure trees with diameter above the reach of the technician in forest inventories.

RESUMO A concentração de metais pesados zinco (Zn), chumbo (Pb), cromo (Cr), níquel (Ni), cobre (Cu) e cádmio (Cd) tem aumentado nos últimos anos nos compartimentos aquáticos em função do uso indiscriminado de fertilizantes na agricultura, da falta de saneamento e do descarte de resíduos industriais não tratados. O objetivo deste trabalho foi investigar a disponibilidade dos metais pesados nas águas e em Salvinia auriculata Aubl. das áreas alagadas dos Marimbus, Bahia. As amostras foram submetidas à digestão ácida (HNO3; HClO4) e as análises dos metais pesados utilizaram um aparelho de absorção atômica de chama ar-acetileno. Nas águas, foram detectados teores de chumbo e zinco com valores dentro dos limites permissíveis para águas de classe 1, conforme Resolução CONAMA nº 357/2005 (BRASIL, 2005). Em S. auriculata, observou-se acumulação de concentração de metais na seguinte ordem Zn>Cr>Pb>Ni>Cu. Conclui-se que a presença da S. auriculata nos corpos hídricos funciona como importante removedor de metais pesados e sua presença nos ambientes aquáticos é extremamente relevante para permitir os diversos usos que esse espaço proporciona.

ABSTRACT In recent years, concentration of heavy metals like zinc (Zn), lead (Pb), chromium (Cr), nickel (Ni), copper (Cu) and cadmium (Cd) has increased over the past years in water bodies due to indiscriminate use of fertilizers in agriculture, lack of sanitation and irregular disposal of untreated industrial waste. The main goal of this study was to investigate the presence of heavy metals in the water and in the Salvinia auriculata Aubl. found in flooded areas of Marimbus, Bahia. The samples were subjected to acid digestion (HNO3, HClO4) and the analyses of heavy metals used an air-acetylene flame atomic absorption spectrometer. The detected levels of lead and zinc found in the water samples were within the limits set for water class 01 by CONAMA no. 357/2005 (BRASIL, 2005). An accumulation of metal concentration in the order of Zn>Cr>Pb>Ni>Cu was observed in S. auriculata. Thus, the presence of S. auriculata in water bodies serves as an important remover of heavy metals and their presence in aquatic environments is extremely important to allow the various uses such environments may provide.

Abstract The aim of this study was to analyze the efficiency of experimental light-curing resin cements (ERCs) with a ternary photo-initiator system containing diphenyliodonium hexafluorphosphate (DPI) and different amines on retention of glass-fiber posts to dentin (GFP). ERCs formulations: a 1:1 mass ratio of 2,2-bis[4-(2-hydroxy-3-methacryloxypropoxy)phenylpropane and triethyleneglycol dimethacrylate. Camphorquinone was used as initiator. Six experimental groups were established according to the amine used: [ethyl-4-(dimethylamino)benzoate-EDMAB or 2-(dimethylamino)ethyl methacrylate-DMAEMA] and the concentration of DPI (0, 0.5 mol%, 1 mol%). The resin cements Variolink II (dual- and light-cured versions) were used as commercial reference. Eighty recently extracted bovine incisors (n = 10) were selected for this study. The roots were prepared and the fiber posts were cemented with the resin cement specified for each experimental group. Specimens from coronal, middle, and apical thirds of the root were subjected to push-out bond strength test 24 hours after bonding. Data were subjected to split-plot ANOVA and the Tukey test (p = 0.05). ERCs containing DPI showed statistically significant higher bond strengths compared with ERCs without DPI. ERCs containing DPI were statistically similar to VARIOLINK II – dual-cured and superior to VARIOLINK II – light-cured (except for EDMAB – 1DPI in the medium third and DMAEMA – 1DPI in the coronal third). Different amines did not influence post retention. The apical root region showed the lowest bond strength for the groups EDAB-0DPI, DMAEMA-0DPI and VARIOLINK II light-cured. Light-cured ERCs containing DPI were efficient for GFP retention to radicular dentin, with similar behaviour to that of dual-curing commercial resin cement.

A videira (Vitis vinifera L.) é uma das plantas mais cultivadas em Portugal, sendo que as suas folhas não têm praticamente utilização. Trabalhos recentes demonstraram que são constituídas por uma série de componentes que lhe conferem propriedades e funções de elevada importância. No presente trabalho, pretendeu-se avaliar as folhas de diferentes castas de videira no que respeita ao seu teor em antioxidantes e bioatividade com vista à sua inclusão na dieta humana. A partir de 10 castas de videira, quatro tintas (Tinta Amarela, Tinta Roriz, Touriga Franca e Touriga Nacional) e seis brancas (Côdega do Larinho, Fernão Pires, Gouveio, Malvasia Fina, Rabigato e Viosinho) cultivadas no Planalto Mirandês, e colhidas amostras de folhas sãs, foram obtidos resultados que indicaram que as castas brancas têm maior teor em componentes bioativos e potencial antioxidante, sendo as folhas da casta Malvasia Fina as que apresentaram maior interesse para serem processadas e incluídas como ingrediente na dieta humana.

Grapevine (Vitis vinifera L.) is one of the most cultivated plants in Portugal, and its leaves have practically no use. Recent studies have shown that the leaves consist of a range of components that confer properties and functions of huge importance. The present study aimed to assess the leaves from different grape varieties regarding their antioxidants content and bioactivity in order to include in the human dietary. From the 10 grape varieties, four red (Tinta Amarela, Tinta Roriz, Touriga Franca e Touriga Nacional) and six white (Côdega do Larinho, Fernão Pires, Gouveio, Malvasia Fina, Rabigato and Viosinho) grown in the Planalto Mirandés, samples were harvested from healthy leaves and the results obtained indicated that the white varieties have the most interesting antioxidant potential and bioactive components, being the leaves of Malvasia Fina those with the greatest potential to be processed and included as an ingredient in the human diet.

Abstract AIMS This study was designed to investigate the effects of 14 water environment adaptation days on motor behavior and physiological condition of swimming rats. METHODS Sixty male Wistar rats were divided into four groups-baseline (Bl) and control (Co) groups-which did not perform the water environment adaptation; and sub (SubAnT) and (SupraAnT) anaerobic threshold groups, which performed 14 water environment adaptation days with sub or supra anaerobic threshold progressive loads (from the tenth day), respectively. The climbing-swimming prevalence (i.e. motor behavior) was analyzed during the water environment adaptation days. Lactate minimum test (LMT) parameters and muscular/hepatic glycogen content in addition to serum creatine kinase were also measured. RESULTS Animals from SubAnT and SupraAnT groups presented a lower climbing-swimming pattern throughout the extent of the experiment (p=0.000), especially after the 5th session. These results were achieved without an improvement in the LMT results or glycogen/creatine kinase. In addition, improvements of 26.6% and 25% for the LMT success rate (i.e. LMT reliability) were obtained only for SubAnT and SupraAnT animals. CONCLUSION Overall, we demonstrated that a water environment adaptation period is necessary for lowering the climbing-swimming pattern without physiological improvement.

Moléculas bioativas de espécies vegetais são alternativas promissoras ao controle químico dos nematoides gastrintestinais em ruminantes. Extratos de sementes de espécies nativas e exóticas do Semiárido Brasileiro foram testados in vitro em ensaio de eclosão de ovos e investigada a natureza proteica da bioatividade. Três extrações com três solventes foram feitas para cada semente estudada. Todas as sementes apresentaram atividade ovicida, variando com o solvente utilizado. Maior taxa de inibição da eclosão concentrou-se nas frações de moléculas de baixa massa molecular (<12 kDa) para Albizia lebbeck, Ipomoea asarifolia, Jatropha curcas, Libidibia ferrea, Moringa oleifera e Ricinus communis(P<0,05, teste de Bonferroni). Crotalaria spectabilis mostrou atividade nas duas frações, sem diferença entre elas (P>0,05, teste de Bonferroni). Observou-se atividade hemaglutinante nas frações de C. spectabilis e M. oleifera, de hemolisina em A. lebbeck e M. oleifera, de atividade inibidora de protease da serina em A. lebbeck, I. asarifolia, J. curcas, M. oleifera e R. communis, de atividade inibidora de protease da cisteína em M. oleifera e nenhuma atividade proteica na fração de L. ferrea. Os resultados revelaram novas espécies botânicas com potencial de controle de nematoides em caprinos e um novo campo de pesquisa, o estudo de moléculas de origem proteica com atividade ovicida.

Bioactive molecules of plant species are promising alternatives for the chemical control of gastrointestinal nematodes in ruminants. Extracts of native and exotic seed species from Brazil's semi-arid region were tested in vitro in an egg hatch assay and the bioactivity of their proteins was investigated. Each seed species was subjected to three extractions with three types of solvents. All the seeds showed ovicidal activity, which varied according to the solvents. Higher ovicidal activity was found in the molecule fractions of low molecular weight (<12 kDa) for Albizia lebbeck, Ipomoea asarifolia, Jatropha curcas, Libidibia ferrea, Moringa oleifera and Ricinus communis(P<0.05, Bonferroni test). The two fractions of Crotalaria spectabilis showed the same ovicidal activity (P>0.05, Bonferroni test). Hemagglutinating activity was detected in the fractions of C. spectabilis and M. oleifera fractions, hemolysin activity in the A. lebbeck and M. oleifera fractions, serine protease inhibitory activity in the A. lebbeck, I. asarifolia, J. curcas, M. oleifera and R. communis fractions, cysteine protease inhibitor activity in the M. oleifera fraction, and no protein activity in the L. ferrea fraction. The results of this work reveal new plant species with a potential for use in controlling nematode parasites in goats, thus opening a new field of research involving plant protein molecules with ovicidal properties.

Resumo O objetivo do presente estudo foi avaliar o possível efeito protetor de soluções fluoretadas aplicadas sobre o esmalte dentário frente à citotoxicidade trans-amelodentinária de um gel clareador com 16% de peróxido de carbamida (PC). O gel de PC foi aplicado sobre discos de esmalte/dentina adaptados a câmaras pulpares aiciais (8 h/dia) durante períodos de 1, 7 ou 14 dias, seguido de aplicação de soluções fluoretadas (0,05% ou 0,2%) durante 1 min. Os extratos (meio de cultura em contato com a dentina) foram aplicados sobre células MDPC-23 durante 1 h, seguido de análise do metabolismo celular (teste do MTT), atividade de fosfatase alcalina (ALP) e danos à membrana celular (citometria de fluxo). A microdureza Knoop do esmalte dental foi avaliada. Os dados foram analisados pelos testes de ANOVA e Kruskal-Wallis. Para o teste do MTT e atividade de ALP, redução significante entre os grupos controle e clareados foram observados (p<0,05). Nenhuma diferença entre os grupos clareados foi observada (p>0,05), independente da aplicação das soluções fluoretadas ou tempo de tratamento. A análise por citometria de fluxo demonstrou lesão à membrana celular em torno de 30% para todos os grupos clareados. Após 14 dias de tratamento, os espécimes clareados e fluoretados apresentaram aumento significante na microdureza do esmalte (p<0,05). Pôde-se concluir que apesar do aumento na dureza do esmalte decorrente da aplicação das soluções fluoretadas, este tratamento não preveniu os efeitos tóxicos causados pelo gel com 16% de PC sobre as células odontoblastóides.

The aim of this study was to evaluate the possibility of fluoride solutions applied to enamel to protect pulp cells against the trans-enamel and transdentinal cytotoxicity of a 16% carbamide peroxide (CP) bleaching gel. The CP gel was applied to enamel/dentin discs adapted to aicial pulp chambers (8 h/day) during 1, 7 or 14 days, followed by fluoride (0.05% or 0.2%) application for 1 min. The extracts (culture medium in contact with dentin) were applied to MDPC-23 cells for 1 h, and cell metabolism (MTT assay), alkaline phosphatase (ALP) activity and cell membrane damage (flow cytometry) were analyzed. Knoop microhardness of enamel was also evaluated. Data were analyzed statistically by ANOVA and Kruskal-Wallis tests (α=0.05). For the MTT assay and ALP activity, significant reductions between the control and the bleached groups were observed (p<0.05). No statistically significant difference occurred among bleached groups (p>0.05), regardless of fluoride application or treatment days. Flow cytometry analysis demonstrated 30% of cell membrane damage in all bleached groups. After 14 days of treatment, the fluoride-treated enamel presented significantly higher microhardness values than the bleached-only group (p<0.05). It was concluded that, regardless of the increase in enamel hardness due to the application of fluoride solutions, the treated enamel surface did not prevent the toxic effects caused by the 16% CP gel to odontoblast-like cells.