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RESUMO OBJETIVO Estimar a soroprevalência de anticorpos do vírus SARS-CoV-2 em escolares de quatro a 14 anos de idade residentes no município de São Paulo, segundo variáveis clínicas, demográficas, epidemiológicas e sociais, durante o período de fechamento das escolas como medida de controle da covid-19. MÉTODOS Realizou-se um inquérito sorológico em setembro de 2020 com amostra aleatória estratificada por tipo de rede de ensino (pública municipal, pública estadual e privada). Foi coletada amostra de sangue venoso utilizando-se o teste de imunoensaio de fluxo lateral da fabricante Wondfo para detecção de anticorpos totais contra o vírus SARS-CoV-2. Aplicaram-se questionários semiestruturados para o levantamento de dados clínicos, demográficos, sociais e epidemiológicos. RESULTADOS A soroprevalência de anticorpos do vírus SARS-CoV-2 em escolares foi de 16,6% (IC95% 15,4–17,8). O estudo encontrou soroprevalências mais elevadas na rede pública municipal (18,5%; IC95% 16,6–20,6) e estadual (16,2%; IC95% 14,4–18,2) em relação à rede privada (11,7; IC95% 10,0–13,7) e entre escolares da raça/cor preta e parda (18,4%; IC95% 16,8–20,2) e no estrato social mais vulnerável (18,5%; IC95% 16,9–20,2). A pesquisa identificou menores soroprevalências nos escolares que relataram seguir as medidas recomendadas de proteção contra a covid-19. CONCLUSÃO A soroprevalência de anticorpos contra o vírus SARS-CoV-2 atinge principalmente os escolares socialmente mais vulneráveis. Este estudo pode contribuir para embasar políticas públicas que reforcem a importância da suspensão das aulas presenciais e da necessidade de estratégias de medidas de proteção e acompanhamento do status sorológico daqueles que ainda não foram contemplados no calendário vacinal.

ABSTRACT OBJECTIVE To estimate seroprevalence of SARS-CoV-2 antibodies in schoolchildren aged 4 to 14 years living in the city of São Paulo, according to clinical, demographic, epidemiological, and social variables, during the school closure period as a measure against covid-19 spread. METHODS A serological survey was made in September 2020 with a random sample stratified by school system (municipal public, state public and private) type. A venous blood sample was collected using the Wondfo SARS-CoV-2 Antibody Test (lateral flow method) for detection of total SARS-CoV-2 virus antibodies. Semi-structured questionnaires were applied to collect clinical, demographic, social, and epidemiological data. RESULTS Seroprevalence of SARS-CoV-2 antibodies in schoolchildren was of 16.6% (95%CI 15.4–17.8). The study found higher seroprevalence in the municipal (18.5%; 95%CI 16.6–20.6) and state (16.2%; 95%CI 14.4–18.2) public school systems compared to the private school system (11.7; 95%CI 10.0–13.7), among black and brown students (18.4%; 95%CI 16.8–20.2) and in the most vulnerable social stratum (18.5 %;95%CI 16.9–20.2). Lower seroprevalence was identified in schoolchildren who reported following the recommended protective measures against covid-19. CONCLUSION Seroprevalence of SARS-CoV-2 antibodies is found mainly in the most socially vulnerable schoolchildren. This study can contribute to support public policies that reinforce the importance of suspending face-to-face classes and developing strategies aimed at protective measures and monitoring of the serological status of those who have not yet been included in the vaccination schedule.

https://doi.org/10.11606/s1518-8787.2023057004782

Accuracy of DRIS and CND methods and nutrient sufficiency ranges for soybean crops in the Northeast of Brazil
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Souza, Henrique Antunes de

; Rozane, Danilo Eduardo

; Vieira, Paulo Fernando de Melo Jorge

; Sagrilo, Edvaldo

; Leite, Luiz Fernando Carvalho

; Brito, Lucélia Cássia Rodrigues de

; Conceição, Mariana Passos

; Ferreira, Ane Caroline Melo

Acta Scientiarum. Agronomy

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2023, Volume 45 elocation e59006

Abstract: En | Text: En | PDF: En

ABSTRACT. This study aimed to evaluate the nutrition of commercial soybean crops in an agricultural frontier region using the diagnosis and recommendation integrated system (DRIS) and compositional nutrient diagnosis (CND) methods, as well as identify sufficiency ranges. The study was performed by collecting leaf samples (third trifoliate leaf without petiole) at flowering from commercial soybean crops in the states of Piauí and Maranhão, Brazil, and evaluating the crop yield by analyzing macro- and micronutrients in the plant tissue of 98 samples. The DRIS and CND methods were applied based on the cataloged data, followed by the generation of norms, analysis of relationships between yield and nutrients (selecting high-yield crops by the cumulative function of the data), generation of sufficiency ranges, and comparison of methods. The relationships obtained by the DRIS and CND indices with the yield and nutrients were significant, indicating that both methods can be employed for the evaluation of leaf nutrients in soybean. The sufficiency ranges from the DRIS and CND methods presented superior nutrient ranges in relation to the values proposed in the literature for macronutrients, except for nitrogen, and greater range amplitudes for micronutrients.

https://doi.org/10.4025/actasciagron.v45i1.59006

Seroprevalence of SARS-CoV-2 antibodies in schoolchildren in the city of São Paulo, 2020
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Kamioka, Gabriela Akemi

; Madalosso, Geraldine

; Albuquerque, José Olimpio Moura de

; Costa, Selma Anequini

; Ferreira, Paula Bisordi

; Sato, Ana Paula Sayuri

; Glasser, Paula Regina

; Pino, Francisco Alberto

; Burihan, Patrícia Carla Piragibe Ramos

; Carvalho, Ana Carolina Aguiar de

; Amorim, Ana Beatriz Pagliaro

; Cavazzana, Cinthya Luzia

; Aires, Caroline Cotrim

; Kataoka, Ana Paula Arruda Geraldes

; Savani, Elisa San Martin Mouriz

; Bessa, Thirsa Alvares Franco

; Aguiar, Breno Souza de

; Failla, Marcelo Antunes

; Santos, Edson Aparecido dos

; Brito, Edjane Maria Torreão

; Santos, Maria Cristina Honório dos

; Caldeira, Luiz Artur Vieira

; Silva, Solange Maria Saboia e

; Zamarco, Luiz Carlos

; Fonseca, Sandra Maria Sabino

; Lima, Marcia Maria de Cerqueira

; Marques, Ivanilda Argenau

; Mauro, Athenê Maria de Marco França

; Masi, Eduardo de

Revista de Saúde Pública

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2023, Volume 57 elocation 6s

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

https://doi.org/10.11606/s1518-8787.2023057004782

Guided Endodontics in Root Canals with Complex Access: Two Case Reports
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Gonçalves, Wesley Fernandes

; Garcia, Lucas da Fonseca Roberti

; Vieira-Schuldt, Daniela Peressoni

; Bortoluzzi, Eduardo Antunes

; Dias-Júnior, Luiz Carlos de Lima

; Teixeira, Cleonice da Silveira

Brazilian Dental Journal

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nov 2021, Volume 32 N. 6 Pages 115 - 123

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

Resumo Este artigo relatou dois casos clínicos em que a endodontia guiada foi utilizada para realizar o acesso aos canais radiculares. O primeiro caso apresenta uma mulher de 40 anos com história de dor relacionada ao canino superior esquerdo. Após exame radiográfico, notou-se a presença de calcificação acentuada até o terço apical do canal radicular, associada a radioluscência periapical. No segundo caso, um homem de 85 anos foi encaminhado ao nosso serviço com dor à palpação no primeiro molar inferior direito. As imagens radiográficas revelaram a presença de tratamento endodôntico e pino de fibra de vidro no canal radicular distal, que estava associado à extrusão do material obturador e lesão periapical. Os guias-3D foram planejados com base em tomografia computadorizada de feixe cônico e escaneamento intraoral digital, os quais foram alinhados por meio de um software específico. Desta forma, brocas de implante puderam ser guiadas até o comprimento necessário do canal radicular para cada caso. No primeiro caso, foi confeccionado um canal radicular cirúrgico e o paciente ficou sem sinais e sintomas após o término do tratamento. No segundo caso, observou-se que o pino de fibra foi desgastado pela broca, permitindo o livre acesso ao material obturador. Foi possível realizar a reintervenção endodôntica de forma mais previsível e em menos tempo. Em ambos os casos, o uso da endodôntica guiada permitiu a preservação de grande parte da estrutura dentária. Os procedimentos foram realizados com maior agilidade, sem a ocorrência de fraturas e perfurações.

Abstract This article reported two clinical cases in which the guided endodontics was used to perform the access to the root canals. The first case presents a 40-year-old female with a history of pain related to the left maxillary canine. After radiographic examination, the presence of severe calcification up to the apical third of the root canal, associated with a periapical radiolucency, was noted. In the second case, an 85-year-old male was referred to our service with pain upon palpation, at the right mandibular first molar. The radiographic images revealed the presence of endodontic treatment and a fiberglass post in the distal root canal, which was associated with extrusion of the filling material and a periapical lesion. The 3D-guides were planned based on cone beam computed tomography and intraoral digital scanning, which were aligned using a specific software. Therefore, implant drills could be guided up to the root canal length required for each case. In the first case, a surgical root canal was created and the patient was free of signs and symptoms after the treatment was completed. In the second case, it was observed that the fiber post was worn by the drill, allowing free access to the filling material. It was possible to perform the endodontic reintervention in a more predictable way and in less time. In both cases, the use of the guided endodontics allowed the preservation of a large part of the dental structure. The procedures were performed faster, without the occurrence of fractures and perforations.

https://doi.org/10.1590/0103-6440202104537

Prevalence evolution of SARS-CoV-2 infection in the city of São Paulo, 2020–2021
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Albuquerque, José Olimpio Moura de

; Kamioka, Gabriela Akemi

; Madalosso, Geraldine

; Costa, Selma Anequini

; Ferreira, Paula Bisordi

; Pino, Francisco Alberto

; Sato, Ana Paula Sayuri

; Carvalho, Ana Carolina Aguiar de

; Amorim, Ana Beatriz Pagliaro

; Aires, Caroline Cotrim

; Kataoka, Ana Paula Arruda Geraldes

; Savani, Elisa San Martin Mouriz

; Bessa, Thirsa Alvares Franco

; Aguiar, Breno Souza de

; Failla, Marcelo Antunes

; Santos, Edson Aparecido dos

; Brito, Edjane Maria Torreão

; Santos, Maria Cristina Honório dos

; Silva, Solange Maria Saboia e

; Caldeira, Luiz Artur Vieira

; Zamarco, Luiz Carlos

; Fonseca, Sandra Maria Sabino

; Lima, Marcia Maria de Cerqueira

; Marques, Ivanilda Argenau

; Silva, Fabiana Érica Vilanova da

; Glasser, Paula Regina

; Burihan, Patrícia Carla Piragibe Ramos

; Cavazzana, Cinthya Luzia

; Mello, Debora Silva de

; Pellini, Alessandra Cristina Guedes

; Nishio, Fernando Yoshiki

; Kian, Fernanda Miyashiro

; Braga, Elza de Santana

; Bertelli, Nilza Maria Piassi

; Fracini, Wagner

; Gonçalves, Marcelo Dell Áquila

; Zular, Paulete Secco

; Piva, Regiane de Santana

; Masi, Eduardo

Revista de Saúde Pública

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2021, Volume 55 elocation 62

Abstract: En | Text: En | PDF: En

ABSTRACT OBJECTIVE To estimate the evolution of the prevalence of SARS-CoV-2 virus infection among residents aged 18 years or over in the municipality of São Paulo. METHODS This is a population-based household survey conducted every 15 days, between June and September 2020, and January and February 2021. In total, the study comprised 11 phases. The presence of antibodies against SARS-CoV-2 was identified in venous blood using a lateral flow test, Wondfo Biotech. In the last phase, the researchers combined it with an immunoenzymatic test, Euroimmun. The participants also answered a semi-structured questionnaire on sociodemographic and economic factors, and on social distancing measures. Prevalence estimates and the 95% confidence interval were estimated according to regions, Human Development Index, sex, age group, ethnicity, education, income, and variables associated with risk or prevention of infection. To compare the frequencies among the categories of each variable, the chi-square test with Rao-Scott correction was used, considering a significance level of 5%. RESULTS In total, 23,397 individuals were interviewed and had their samples collected. The estimated prevalence of antibodies against SARS-CoV-2 ranged from 9.7% (95%CI: 7.9–11.8%) to 25.0% (95%CI: 21.7–28.7). The prevalence of individuals with antibodies against the virus was higher among black and brown people, people with lower schooling and income, and among residents of regions with lower Human Development Index. The lowest prevalences were associated with recommended measures of disease protection. The proportion of asymptomatic infection was 45.1%. CONCLUSION The estimated prevalence of the infection was lower than the cumulative incidence variation, except for the last phase of the study. The differences in prevalence estimates observed among subpopulations showed social inequality as a risk of infection. The lower prevalence observed among those who could follow prevention measures reinforce the need to maintain social distancing measures as a way to prevent SARS-CoV-2 infection.

https://doi.org/10.11606/s1518-8787.2021055003970

Prevalence evolution of SARS-CoV-2 infection in the city of São Paulo, 2020–2021
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Albuquerque, José Olimpio Moura de

; Kamioka, Gabriela Akemi

; Madalosso, Geraldine

; Costa, Selma Anequini

; Ferreira, Paula Bisordi

; Pino, Francisco Alberto

; Sato, Ana Paula Sayuri

; Carvalho, Ana Carolina Aguiar de

; Amorim, Ana Beatriz Pagliaro

; Aires, Caroline Cotrim

; Kataoka, Ana Paula Arruda Geraldes

; Savani, Elisa San Martin Mouriz

; Bessa, Thirsa Alvares Franco

; Aguiar, Breno Souza de

; Failla, Marcelo Antunes

; Santos, Edson Aparecido dos

; Brito, Edjane Maria Torreão

; Santos, Maria Cristina Honório dos

; Silva, Solange Maria Saboia e

; Caldeira, Luiz Artur Vieira

; Zamarco, Luiz Carlos

; Fonseca, Sandra Maria Sabino

; Lima, Marcia Maria de Cerqueira

; Marques, Ivanilda Argenau

; Silva, Fabiana Érica Vilanova da

; Glasser, Paula Regina

; Burihan, Patrícia Carla Piragibe Ramos

; Cavazzana, Cinthya Luzia

; Mello, Debora Silva de

; Pellini, Alessandra Cristina Guedes

; Nishio, Fernando Yoshiki

; Kian, Fernanda Miyashiro

; Braga, Elza de Santana

; Bertelli, Nilza Maria Piassi

; Fracini, Wagner

; Gonçalves, Marcelo Dell Áquila

; Zular, Paulete Secco

; Piva, Regiane de Santana

; Masi, Eduardo

Revista de Saúde Pública

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2021, Volume 55 elocation 62

Abstract: En | Text: En | PDF: En

https://doi.org/10.11606/s1518-8787.2021055003970 43 downloads

Castor cake as organic fertilizer to control gastrointestinal nematodes in pasture-raised sheep
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Maranguape, Jéssica Sousa

; Pompeu, Roberto Cláudio Fernandes Franco

; Vieira, Luiz da Silva

; Souza, Henrique Antunes de

; Oliveira, Eduardo Luiz de

; Sousa, Ana Márjory Paiva

; Costa, Clésio dos Santos

; Santos, Milena Alves dos

; Pereira, Patrício Leandro

; Salles, Hévila Oliveira

Revista Brasileira de Parasitologia Veterinária

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2020, Volume 29 N. 4 elocation e021420

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

Resumo O parasitismo gastrintestinal é um dos fatores que fragiliza a exploração de pequenos ruminantes em pastagens cultivadas. Objetivando validar a estratégia de tratamento do solo para o controle dos estágios de vida livre de nematoides gastrintestinais (NGI), a torta de mamona (TM) foi utilizada como adubo, com ovinos pastejando em capim-tanzânia sob lotação contínua. No dia zero, o pasto foi dividido em três piquetes, contaminados por NGI e tratados, respectivamente, com TM parcelada em duas aplicações (2TM1/2), TM em uma única aplicação (TM1) e composto orgânico em única aplicação (testemunha). No dia 21, cada piquete recebeu oito ovinos livres de NGI. No dia 58, observaram-se diferenças significativas (P<0,05): redução de até 66,10% de larvas.g-1 de massa seca nas pastagens adubadas com TM; redução de até 60,72% da infecção dos animais nos grupos tratados com TM; ganho de peso médio diário (acima de 185 g.dia-1) e volume globular (acima de 26%) superior nos grupos tratados com TM, quando comparados com a testemunha (128 g.dia-1; 20,9%). Diante dos resultados, o uso da TM, principalmente TM1, como adubo em pasto de capim-tanzânia, sob lotação contínua, mostrou-se promissor, com eficácia de 63,41% para controlar a verminose.

Abstract Gastrointestinal parasitism is one of the factors that discourages farmers from raising small ruminants in cultivated pastures. To validate a soil treatment strategy to control the free-living stages of gastrointestinal nematodes (GIN), castor cake (CC) was used as a fertilizer on a pasture where sheep grazed on guinea grass under continuous stocking. On day zero, the pasture was divided into three paddocks, contaminated by GIN and treated, respectively, with CC divided into two applications (2CC1/2), CC in a single application (CC1) and organic compost in a single application (control). On day 21, eight GIN-free sheep were placed in each paddock. On day 58, significant differences (P<0.05) were observed: reduction of up to 66.10% in larvae.g-1 of dry mass in pastures fertilized with CC, decrease of up to 60.72% in infection rates among the animals in the groups treated with CC, higher average daily weight gain (over 185 g.day-1) and packed cell volume (over 26%) in the groups treated with CC, when compared to the control (128 g.day-1; 20.9%). In view of the results, the use of CC, mainly CC1, as a fertilizer for guinea grass pastures, under continuous stocking, proved to be promising, with 63.41% effectiveness in controlling worm infestations.

https://doi.org/10.1590/s1984-29612020103 521 downloads

Prevention of bone infection after open fracture using a chitosan with ciprofloxacin implant in animal model
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Kobata, Silvia Iovine

; Teixeira, Luiz Eduardo Moreira

; Fernandes, Simone Odilia Antunes

; Faraco, André Augusto Gomes

; Vidigal, Paula Vieira Teixeira

; Araújo, Ivana Duval de

Acta Cirúrgica Brasileira

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2020, Volume 35 N. 8 elocation e202000803

Abstract: En | Text: En | PDF: En

Abstract Purpose To evaluate different concentrations of ciprofloxacin to prevent infection after open fracture contaminated with S. aureus in rats using absorbable local delivery system. Methods Fifty-two Wistar rats were assigned to six groups. After 4 weeks, all animals underwent 99mTc-ceftizoxima scintigraphy evaluation, callus formation measurement and histological analysis. ANOVA, t-Student and Kruskal Wallis were used for quantitative variables statistical analysis, whereas qui square and exact Fisher were used for qualitative variables. Results Treatment using 25% and 50% of ciprofloxacin incorporated at the fracture fixation device were effective in preventing bone infection compared to control group (p<0.05). Chitosan were not effective in preventing bone infection when used alone compared to control group (p>0.05). Histological findings demonstrated bone-healing delay with 50% of ciprofloxacin. No difference in callus formation were observed (p>0.05). Conclusion Local delivery treatment for contaminated open fracture using chitosan with ciprofloxacin is effective above 25%.

https://doi.org/10.1590/s0102-865020200080000003 997 downloads

Critical levels and sufficiency ranges for leaf nutrient diagnosis by two methods in soybean grown in the Northeast of Brazil
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Souza, Henrique Antunes de

; Vieira, Paulo Fernando de Melo Jorge

; Rozane, Danilo Eduardo

; Sagrilo, Edvaldo

; Leite, Luiz Fernando Carvalho

; Ferreira, Ane Caroline Melo

Revista Brasileira de Ciência do Solo

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2020, Volume 44 elocation e0190125

Abstract: En | Text: En | PDF: En

ABSTRACT Establishing sufficiency ranges and critical levels of nutrients are important for a correct evaluation of plant nutrition through leaf diagnosis. This study aimed to propose critical levels and sufficiency ranges of macro and micronutrients based on leaf diagnosis of soybean plants. The database used was generated from 86 samples of the third trifoliate leaf without petiole, collected during the flowering stage from soybean plants of the main cultivars used in the states of Piauí and Maranhão, Northeast region of Brazil. The results of macro and micronutrients and grain yield were used to calculate the critical level by the reduced normal distribution and boundary line methods, the latter was also used to generate the sufficiency ranges. Nutrient levels for 90 % maximum grain yield were considered for the critical level by the reduced normal distribution, and nutrient levels at the upper line of a dispersion diagram were considered for the boundary line method, using the relation between grain yield and nutrient concentration to generate sufficiency ranges for 95 and 99 % maximum grain yields. The critical levels generated by the boundary line method presented a larger number of deficient samples than the reduced normal distribution method, except for boron. The sufficiency ranges generated by the boundary line with 95 % of the maximum grain yield could not diagnose nutrient deficiency, except for copper. The critical levels by the reduced normal distribution and boundary line methods for leaf diagnosis of soybean were 40.2 and 42.1 g kg-1, 3.2 and 3.4 g kg-1, 17.6 and 19.5 g kg-1, 8.7 and 10.3 g kg-1, 4.7 and 4.9 g kg-1, 2.1 and 2.4 g kg-1, 44 and 44 mg kg-1, 5 and 12 mg kg-1, 125 and 145 mg kg-1, 33 and 34 mg kg-1, and 48 and 63 mg kg-1 for N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, and Zn, respectively. The critical levels by boundary line showed better distribution for leaf diagnosis for excess, deficiency, and adequate nutrient levels. The sufficiency ranges by the boundary line method for N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, and Zn were 38.6-45.7 g kg-1, 3.1-3.7 g kg-1, 18.3-20.7 g kg-1, 9.4-11.3 g kg-1, 4.4-5.3 g kg-1, 2.1-2.7 g kg-1, 35-53 mg kg-1, 10-14 mg kg-1, 131-159 mg kg-1, 23-46 mg kg-1, and 58-68 mg kg-1, respectively. The reduced normal distribution and boundary line methods allowed the generation of critical levels and sufficiency ranges for leaf diagnosis of soybean. The sufficiency range generated by the boundary line with 95 % maximum grain yield showed no prevalence of diagnosis of nutrient deficiency, except for copper.

https://doi.org/10.36783/18069657rbcs20190125 799 downloads

10.

Crop residues activity against the free-living stages of small ruminant nematodes
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Salles, Hévila Oliveira

; Braga, Ana Carolina Linhares

; Nascimento, Danisvânia Ripardo

; Prado, Mayara Stephanny Melo

; Souza, Henrique Antunes de

; Oliveira, Eduardo Luiz de

; Vieira, Luiz da Silva

; Cavalcante, Antônio Cézar Rocha

; Lima, Adriano Rodrigues

; Teles Neto, Cláudio Santos

; Sousa, Ana Márjory Paiva

; Ribeiro, Regislane Pinto

; Pompeu, Roberto Cláudio Fernandes Franco

Revista Brasileira de Parasitologia Veterinária

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jul 2019, Volume 28 N. 3 Pages 528 - 532

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

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.

https://doi.org/10.1590/s1984-29612019024 665 downloads

11.

Conceitos básicos de radiômetros de substituição elétrica para medidas da Irradiância Solar Total
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Carlesso, Franciele

; Gómez, Jenny Marcela Rodríguez

; Vieira, Luis Eduardo Antunes

; Savonov, Graziela da Silva

; Berni, Luiz Angelo

; Costa, Lucas Lopes

Revista Brasileira de Ensino de Física

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2019, Volume 41 N. 2 elocation e20180220

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

Resumo A irradiância solar total (TSI) é definida como a energia emitida pelo Sol por unidade de área e recebida pela Terra. Durante muitos anos essa energia foi considerada constante, no entanto, hoje se sabe que há variações em diferentes escalas de tempo. A medição do valor absoluto da TSI precisar ser realizada em ambiente extraterrestre devido à influência da atmosfera na irradiância solar que atinge a superfície da Terra. Sendo a TSI uma variável imprescindível para quantificar a influência solar nas mudanças climáticas da Terra, a obtenção de medidas com a precisão e estabilidade necessária têm se demonstrado um grande desafio tecnológico. Nesse artigo é descrito o princípio de funcionamento e as particularidades dos radiômetros de substituição elétrica utilizados para medir a TSI no espaço.

Abstract Total solar irradiance (TSI) is the solar energy per unit area received by the Earth. For many years, this energy was considered constant. However, it is known there are variations in different time scales. The TSI absolute value needs to be performed in an extraterrestrial environment due the Earth's atmosphere influence these measurements. The TSI is an important variable to quantify the solar influence on Earth's climate. For this purpose, high precision and stability measurements are necessary. These kind of measurements has proven to be a major technological challenge. This paper describes the operation mode and some characteristics of the electrical substitution radiometer (ESR) used to measure TSI in the space.

https://doi.org/10.1590/1806-9126-rbef-2018-0220 3726 downloads

12.

O número de manchas solares, índice da atividade do sol
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Echer, Ezequiel

; Rigozo, Nivaor Rodolfo

; Nordemann, Daniel Jean Roger

; Vieira, Luiz Eduardo Antunes

; Prestes, Alan

; Faria, Heloisa Helena De

Revista Brasileira de Ensino de Física

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jun 2003, Volume 25 N. 2 Pages 157 - 163

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

O número de manchas solares é o índice mais antigo da atividade solar, com observações de manchas solares estendendo-se desde 1611. Ele serve como uma medida da atividade magnética geral do Sol. Neste trabalho apresentamos uma descrição das características físicas das manchas solares, a definição do número de manchas solares, uma análise espectral do mesmo e uma reconstrução de 1000 anos.

The sunspot number is the longest solar activity index available with observations since 1611. It is a measure of the general state of solar magnetic activity. In this work we present a desciption of sunspot physical caracteristics, the definition of the sunspot number, a spectral analysis and a reconstruction for the last 1000 years of the sunspot number.

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