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Normalized difference vegetation index for desiccation evaluation with glyphosate + 2,4-D in magnetized spray solution
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Alvarenga, C. B.

; Mundim, G. S. M.

; Santos, E. A.

; Gallis, R. B. A.

; Zampiroli, R.

; Rinaldi, P. C. N.

; Prado, J. R.

Brazilian Journal of Biology

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2023, Volume 83 elocation e246579

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

Resumo A magnetização da água e o geoprocessamento são ferramentas cada vez mais utilizadas no manejo de ervas daninhas. Nosso objetivo foi estudar a influência da magnetização da água na eficiência do herbicida e verificar se existe uma relação entre os escores de controle e o índice de vegetação por diferença normalizada (NDVI). No experimento de laboratório, a água foi submetida à magnetização e avaliada em relação a quatro características. No experimento de campo, parcelas de capim-braquiária foram submetidas a tratamentos em esquema fatorial (6 × 2 + 1). Seis fatores herbicidas (doses de glyphosate e glyphosate + 2,4-D) e a magnetização ou ausência de magnetização da calda foram avaliados e comparados com o tratamento controle (sem pulverização). Avaliações de controle de plantas daninhas foram realizadas seis vezes. As imagens foram obtidas usando uma câmera multiespectral incorporada para determinar os valores de NDVI. Os dados relacionados às características da água foram analisados por meio do teste t. O controle de plantas daninhas e os dados de NDVI foram submetidos à análise de variância e são apresentados em gráficos de regressão. A análise de dispersão dos dados NDVI foi realizada de acordo com os escores de controle. O processo de magnetização diminuiu o pH da água e aumentou a tensão superficial, mas não influenciou nos escores de controle ou no NDVI. Conforme a dose de glyphosate foi aumentada, os escores de controle foram maiores e os valores de NDVI foram menores. A água magnetizada não afetou a eficiência biológica dos herbicidas, e houve uma forte correlação entre os escores de controle e os valores de NDVI.

Abstract Water magnetization and geoprocessing are increasingly utilized tools in weed management. Our objective was to study the influence of water magnetization on herbicide efficiency and to verify whether there is a relationship between control scores and the normalized difference vegetation index (NDVI). In the laboratory experiment, water was subjected to magnetization and evaluated with respect to four characteristics. In the field experiment, plots of Brachiaria grass were subjected to treatments in a factorial scheme (6 × 2 + 1). Six herbicidal factors (doses of glyphosate and glyphosate + 2,4-D) and the magnetization or absence of magnetization of the spray solution were evaluated and compared against the control treatment (without spraying). Weed control assessments were carried out six times. Images were obtained using an embedded multispectral camera to determine the NDVI values. Data related to water characteristics were analyzed using the t test. Weed control and NDVI data were subjected to analysis of variance and are presented in regression graphs. Dispersion analysis of NDVI data was performed according to the control scores. The magnetization process decreased the pH of the water and increased the surface tension, but it did not influence the control scores or the NDVI. As the glyphosate dose was increased, the control scores were higher and the NDVI values were lower. Magnetized water did not affect the biological efficiency of the herbicides, and there was a strong correlation between the control scores and the NDVI values.

https://doi.org/10.1590/1519-6984.246579 540 downloads

Hepatitis A seroprevalence among special populations in the Rio de Janeiro Metropolitan Area, Brazil
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Carvalho, Flavio de

; Brandão, Luciana Gomes Pedro

; Varela, Margaret Catoia

; Tuyama, Mari

; Correa, Danusa Ferreira

; Santos, Ananza Taina da Silva

; Lemos, Alberto dos Santos de

; Costa, Marcellus Dias da

; Cerbino-Neto, José

; Brasil, Pedro Emmanuel Alvarenga Americano do

Cadernos de Saúde Pública

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2023, Volume 39 N. 2 elocation e00075522

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

Este estudo teve como objetivo estimar a soroprevalência do vírus da hepatite A, em indivíduos atendidos em uma clínica de medicina de viagem e imunização no Rio de Janeiro, Brasil, e desenvolver um modelo de predição para a soroprevalência do vírus da hepatite A. Esta pesquisa retrospectiva incluiu indivíduos sequencialmente de abril de 2011 a junho de 2019, em uma clínica de medicina de viagem e uma clínica de vacinação de população especial, que, por qualquer motivo, tem um resultado de quimioluminescência IgG antivírus da hepatite A . Os dados dos participantes foram verificados em prontuário eletrônico. Os dados foram divididos em desenvolvimento e validação, tomando 2018 como data limite da divisão. Um modelo linear generalizado elástico com distribuição binomial submetido a validação cruzada foi aplicado. Foram analisados 2.944 indivíduos atendidos. A soroprevalência geral do vírus da hepatite A foi de 67,8%. Profissionais de saúde, viajantes e contatantes de indivíduos imunocomprometidos apresentaram menor soroprevalência, variando de 40% a 55%, enquanto indivíduos com condições crônicas (coração, pulmão e fígado) tiveram soroprevalência variando de 89% a 94%. Os preditores retidos no modelo final foram sexo, idade, ano de nascimento, viajantes, HIV/aids, asplenia funcional, candidatos a transplante, comunicante domiciliar, imunossupressão relacionada ao câncer e profissionais de saúde. A área sob a curva foi de 0,836 e o erro máximo foi de 0,051. Os usuários podem fazer previsões com uma calculadora (https://pedrobrasil.shinyapps.io/INDWELL/). Os grupos com menor soroprevalência devem ser avaliados com mais cuidado quanto à necessidade de vacinação contra o vírus da hepatite A, mesmo quando procuram clínicas de vacinação para outros fins.

Los objetivos del estudio son estimar la seroprevalencia de hepatitis A en sujetos que asisten a una clínica de medicina para viajeros e inmunización en Río de Janeiro, Brasil, y desarrollar un modelo de predicción de la seroprevalencia de hepatitis A. Esta investigación de seguimiento retrospectivo incluyó a individuos de forma secuencial desde abril de 2011 hasta junio de 2019 en una clínica de medicina para viajeros y de vacunación de poblaciones especiales que por cualquier motivo tienen un resultado de quimioluminiscencia IgG anti-hepatitis A. Los datos de los participantes se verificaron en los registros médicos electrónicos. Los datos se dividieron en conjunto de desarrollo y validación tomando 2018 como fecha de corte. Se realizó un modelo lineal generalizado validado cruzado elástico con distribución binomial. Se analizaron un total de 2.944 sujetos atendidos. La seroprevalencia global del hepatitis A fue del 67,8%. Los profesionales sanitarios, los viajeros y las personas en contacto con sujetos inmunodeprimidos presentaron una seroprevalencia más baja, que osciló entre el 40% y el 55%, mientras que los sujetos con afecciones crónicas (cardíacas, pulmonares y hepáticas) presentaron una seroprevalencia que varió entre el 89% y el 94%. Los predictores retenidos en el modelo final fueron el sexo, la edad, el año de nacimiento, los viajeros, el VIH/SIDA, la disfunción del bazo, los candidatos a trasplante, los comunicadores domésticos, la inmunosupresión relacionada con el cáncer y los profesionales sanitarios. Su área bajo la curva fue de 0,836 y el error máximo de 0,051. Los usuarios pueden hacer predicciones con una calculadora (https://pedrobrasil.shinyapps.io/INDWELL/). Los grupos con menor seroprevalencia deben ser evaluados más cuidadosamente en cuanto a la necesidad de vacunación contra hepatitis A, incluso cuando acudan a las clínicas de vacunación con otros fines.

The objectives were to estimate hepatitis A virus seroprevalence in subjects attending to a travel medicine and immunization clinic in Rio de Janeiro, Brazil, and to develop a prediction model for hepatitis A virus seroprevalence. This retrospective research included individuals sequentially from April 2011 to June 2019 at a travel medicine and special population immunization clinic with an anti-hepatitis A virus IgG chemiluminescence result. Participants’ data were verified via electronic medical records. Data were split into development and validation set taking 2018 as the date break. A cross-validated elastic generalized linear model with binomial distribution was performed. In total, 2,944 subjects were analyzed. Hepatitis A virus overall seroprevalence was 67.8%. Health professionals, travelers, and those who had contact with immunocompromised subjects had lower seroprevalence (40%-55%), whereas subjects with chronic conditions (heart, lung, and liver) ranged from 89% to 94%. The retained predictors in the final model were sex, age, year of birth, travelers, HIV/AIDS, spleen dysfunction, transplant candidates, household communicators, cancer-related immunosuppression, health care professionals. Area under the curve was 0.836 and maximum error was 0.051. Users can make predictions with the following calculator: https://pedrobrasil.shinyapps.io/INDWELL/. The groups with lower seroprevalence should be evaluated more carefully regarding need for hepatitis A virus vaccination even when they seek immunization clinics for other purposes.

https://doi.org/10.1590/0102-311xen075522

Iron interference in hemoglobin production in piglets from birth to weaning
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Cruz, Nathan R.N.

; Baraldi, Thaís G.

; Marinho Neto, Fausto A.

; Alvarenga, Patrícia V.A.

; Oliveira, Juliana P.

; Albuquerque, Ana C.A.

; Brito, Helena C.D.

; Nascimento, Larissa A.B.

; Oliveira, Luís G.

; Santana, Aureo E.

Pesquisa Veterinária Brasileira

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2023, Volume 43 elocation e07161

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

ABSTRACT: Iron deficiency anemia (IDA) in humans is defined as the decrease of total hemoglobin concentration and the non-production of the adult hemoglobin subtype 2 - HbA2 (α2δ2 chains), which is considered a marker of IDA severity in humans, dosed together with the iron serum. This study aimed to determine the standard of hemoglobin types in piglets induced to experimentally IDA in the first 21 days of life (delivery to weaning). In the present study, 40 piglets born from four naïve gilts, were randomly and equally assigned among the gilts. On the third day after delivery, the groups were randomly distributed in different environments (cement and clay floors) and according to the iron supplementation (iron dextran and placebo). Erythrocyte parameters, serum iron, and hemoglobin trait were analyzed at four moments between birth and weaning days. The group of piglets that did not receive iron dextran supplementation on the third-day post-birth and were placed in the pen without soil did not present HbA2 from the seventh day onwards on the agarose electrophoretogram (pH 8.6) and this observation was correlated to decrease of serum iron (ρ: 0.156, p=0.003) when compared to the other groups’ piglets that did not present iron deficiency. In the present study was possible to determine the swine hemoglobin pattern in IDA, since HbA2 was absent in piglets with IDA in comparison to the non-ferropenic groups and the correlation between the reduction of iron levels and the absence of HbA2.

RESUMO: A anemia por deficiência de ferro (ADF) em humanos é definida como a diminuição da concentração de hemoglobina total e a não produção da hemoglobina adulta subtipo 2 - HbA2 (cadeias α2δ2), que é considerada um marcador de gravidade de IDA em humanos, dosado em conjunto com o soro de ferro. Este estudo teve como objetivo determinar o padrão dos tipos de hemoglobina em leitões induzidos experimentalmente à IDA nos primeiros 21 dias de vida (parto ao desmame). Quarenta leitões, nascidos de quatro marrãs nulíparas, foram distribuídos aleatoriamente e igualmente entre as leitoas. No terceiro dia após o parto, os grupos foram distribuídos aleatoriamente em diferentes ambientes (piso de cimento e barro) e de acordo com a suplementação de ferro (ferro dextrano e placebo). Parâmetros eritrocitários, ferro sérico e traço de hemoglobina foram analisados em quatro momentos, entre o nascimento e o desmame. O grupo de leitões que não recebeu suplementação de ferro dextrano no terceiro dia pós-parto e foi colocado em baia sem solo não apresentou HbA2 a partir do sétimo dia no eletroforetograma de agarose (pH 8,6) e esta observação foi correlacionada com diminuição da concentração sérica ferro (ρ: 0,156, p=0,003) quando comparados aos demais grupos leitões que não apresentavam deficiência de ferro. No presente estudo foi possível determinar o padrão hemoglobinêmico suíno na IDA, uma vez que, a HbA2 estava ausente nos leitões com ADF em comparação aos grupos não ferropênicos e há correlação entre a redução dos níveis de ferro e a ausência de HbA2.

https://doi.org/10.1590/1678-5150-pvb-7161

Hepatitis A seroprevalence among special populations in the Rio de Janeiro Metropolitan Area, Brazil
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Carvalho, Flavio de

; Brandão, Luciana Gomes Pedro

; Varela, Margaret Catoia

; Tuyama, Mari

; Correa, Danusa Ferreira

; Santos, Ananza Taina da Silva

; Lemos, Alberto dos Santos de

; Costa, Marcellus Dias da

; Cerbino-Neto, José

; Brasil, Pedro Emmanuel Alvarenga Americano do

Cadernos de Saúde Pública

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2023, Volume 39 N. 2 elocation e00075522

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

https://doi.org/10.1590/0102-311xen075522

Herpetofauna of protected areas in the Caatinga VIII: An updated checklist for the Serra das Confusões region with new data from Serra Vermelha, Piauí, Brazil
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Marques, Ricardo

; Garda, Adrian A.

; Furtado, Adriana P.

; Bruinjé, Andre C.

; Protázio, Arielson dos S.

; de Carvalho, Breno F.

; Vieira, Cecília R.

; Gomes, Dandara

; Pantoja, Davi L.

; Figueiredo, Diainara da S.

; Shepard, Donald B.

; Camurugi, Felipe

; Coelho, Felipe E. A.

; Magalhães, Felipe M.

; Caetano, Gabriel H. O.

; Colli, Guarino R.

; Paulino, Henrique M.

; Carvalho, Izabelle T. S.

; Graciene, Joedma

; Alvarenga, Júlio M.

; Clay, Natalie A.

; Albuquerque, Ralph L.

; Bosque, Renan J.

; Faria, Renato

; da Silveira-Filho, Ricardo R.

; Mângia, Sarah

; Cavalcante, Vitor H. G. L.

; Vieira, Washington L. S.

; da Silva, Willianilson P.

; Soares, Yan F. F.

; Mesquita, Daniel O.

Biota Neotropica

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2023, Volume 23 N. 4 elocation e20231520

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

Abstract It is repeatedly stressed the need to characterize the extant biodiversity in tropical ecosystems. However, inventory studies are still progressing slowly in dry ecosystems, leading to the underestimation of their true biodiversity and hindering conservation efforts. In this study, we present primary and secondary data, along with an updated list of amphibians and reptiles from two localities in the São Francisco-Gurguéia region in Piauí. Additionally, we compare the species composition between nine areas within the Caatinga, which were sampled using standardized methods over the past ten years, to examine broader spatial patterns of community composition. To survey reptiles and amphibians, we employed similar methods and sampling efforts in two areas within the Serra das Confusões National Park (SCNP) region. Our surveys recorded a total of 73 species of amphibians and reptiles, of which 24 are new distribution records for the SCNP region. Consequently, our findings increase the known herpetofauna in the region to 94 species. Despite their proximity, the two sites in the SCNP region exhibited only 42% similarity in species composition, and they differed significantly from other areas within the Caatinga. Furthermore, even the closer Caatinga areas presented differences in species composition, highlighting the necessity to evaluate biodiversity across the landscape and contribute to understanding biogeographic patterns.

Resumo É repetidamente enfatizada a necessidade de caracterizar a biodiversidade vivente em ecossistemas tropicais. No entanto, os estudos de inventário ainda estão progredindo lentamente em ecossistemas secos, levando à subestimação de sua verdadeira biodiversidade e dificultando os esforços de conservação. Neste estudo, apresentamos dados primários e secundários, juntamente com uma lista atualizada de anfíbios e répteis de duas localidades na região de São Francisco-Gurguéia, do Piauí. Além disso, comparamos a composição de espécies entre nove áreas dentro da Caatinga, que foram amostradas usando métodos padronizados nos últimos dez anos, para examinar padrões espaciais mais amplos de composição da comunidade. Para estudar répteis e anfíbios, utilizamos métodos e esforços de amostragem semelhantes em duas áreas na região do Parque Nacional da Serra das Confusões (PNSC). Nossos levantamentos registraram um total de 73 espécies de anfíbios e répteis, das quais 24 são novos registros de distribuição para a região do PNSC. Consequentemente, nossos resultados aumentam a herpetofauna conhecida na região para 94 espécies. Apesar da proximidade, os dois locais na região do PNSC exibiram apenas 42% de similaridade na composição de espécies e diferiram significativamente de outras áreas dentro da Caatinga. Mesmo áreas mais próximas da Caatinga apresentaram diferenças na composição de espécies, destacando a necessidade de avaliar a biodiversidade em toda a paisagem e contribuir para a compreensão de padrões biogeográficos.

https://doi.org/10.1590/1676-0611-bn-2023-1520

How climate change will change the potential distribution of two wood-decaying fungi? wooddecaying wood decaying fungi
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Santos, Danilo C.

; Oliveira, Ailton M. A.

; Alvarenga, Renato L. M.

; Gibertoni, Tatiana B.

Acta Botanica Brasilica

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2023, Volume 37 elocation e20230021

Abstract: En | Text: En | PDF: En

Abstract Changes in climate, which can be understood as fluctuations in climate patterns as a reflection of natural or anthropic interventions, can generate changes in the environment and consequently affect the diversity of organisms. Fungi are extremely important in organic matter cycling in different environments, mainly forest areas, decomposing dead wood. To better understand the effects of climate change on two wood-degrading Agaricomycetes, their potential neotropical distribution was modeled using known occurrence data, available in the GBIF database and in specific literature, and associated with predictor variables extracted from Worldclim. A modeling package in R environment was used to analyze the present and future suitability for the optimistic and pessimistic scenarios. The results indicate the climate as an important factor in the distribution of Auricularia brasiliana and Megasporoporia neosetulosa. The suitability factors for the metrics used indicate that the models can be used to analyze climatic areas and that temperature and precipitation strongly influence the permanence of species in these locations. The results also indicate areas that can be affected by climatic effects, consequently causing a decrease in the occurrence and permanence of these fungi in the Neotropics. Our models can be useful as future guidelines in conservation studies for fungi. interventions organisms environments wood wooddegrading degrading Agaricomycetes data literature Worldclim scenarios neosetulosa locations Neotropics

https://doi.org/10.1590/1677-941x-abb-2023-0021

Simultaneous Quantification of Amorphous and Crystalline Valsartan in Tablets Using Raman Spectroscopy and Chemometrics Tools
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Domingos, Rafael C.

; Pinheiro, Adonilson F.

; Alvarenga Jr., Benedito R. de

; Carneiro, Renato L.

; Farias, Marco A. S.

Journal of the Brazilian Chemical Society

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feb 2022, Volume 33 N. 2 Pages 157 - 162

Abstract: En | Text: En | PDF: En

Valsartan is an antihypertensive active pharmaceutical ingredient (API), it is used in the amorphous state in the commercial products. As amorphous materials are metastable, amorphous valsartan can crystallize to valsartan E, promoting changes in the dissolution and bioavailability of the drug. Tablets containing metastable forms of APIs need special conditions for transport and storage in order to avoid crystallization (from amorphous state) or polymorphic transitions (from less stable crystalline structures). A multivariate calibration model based on interval partial least squares (iPLS) regression allied to net analyte signal (NAS) algorithm was built to simultaneously quantify amorphous (VAL-AM) and crystalline (VAL-E) valsartan. Mixtures of VAL-AM and VAL-E were used to produce tablets in order to simulate the crystallization of VAL-AM in a range from 0 to 100% of conversion. The calibration set included 11 samples and 5 samples were used as the external validation set. The following parameters of merit (POM) were obtained for both polymorphs in order to evaluate the calibration model quality: root mean square error (RMSE) for cross validation (RMSECV), validation (RMSEV) and calibration (RMSEC), sensitivity (SEN), selectivity (SEL), analytical sensitivity (γ), inverse analytical sensitivity (γ−1), limit of detection (LOD) and limit of quantification (LOQ).

https://doi.org/10.21577/0103-5053.20210132

Polycrystalline Compound of Co2+-doped Zn2SnO4: Structural and Photoluminescent Properties
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Alvarenga, T. L.

; Pedro, S. S.

; López, A.

; Sosman, L. P.

Materials Research

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2022, Volume 25 elocation e20210241

Abstract: En | Text: En | PDF: En

Abstract In this work, Zn2SnO4:Co2+ (0.1%) was obtained through a solid-state reaction at high temperature using ZnO, SnO2, and CoCO3. The sample was investigated using X-ray diffraction, X-ray fluorescence, scanning electron microscopy, and photoluminescence spectroscopy. Rietveld refinements of the X-ray diffraction data showed two crystalline phases, Zn2SnO4 and SnO2, with proportions of 97.24% and 2.76%, respectively, while Zn and Sn atoms were observed by X-ray fluorescence. Scanning electron microscopy images showed the polycrystalline nature of the material. Photoluminescence spectroscopy showed two emission bands in the red and near-infrared regions, with the broader and more intense band having a barycenter at 694 nm. The intensity of the emission changed with the excitation wavelength, whereas the barycenter remained unchanged. The intensity, shape, and position of the bands, as well as the calculated crystal field parameters, indicate the insertion of Co2+ ions in the tetrahedral sites of the Zn2SnO4 material.

https://doi.org/10.1590/1980-5373-mr-2021-0241 1 downloads

Human resources policies, learning, and turnover intention in organizations
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Freitas, Alessandra Demite G.

; Lacerda, Fabricio M.

; Santos, Enise A.

; Alvarenga, Marcelo A.

; Bizarrias, Flávio S.

RAM. Revista de Administração Mackenzie

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2022, Volume 23 N. 4 elocation eRAMG220210

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

Resumo Objetivo: Esta pesquisa teve como objetivo investigar de que forma as políticas de recursos humanos e a percepção das oportunidades de aprendizagem nas organizações influenciam a intenção de rotatividade dos profissionais. Originalidade/valor: Os autores demostraram que, ao compreenderem as relações existentes entre os constructos pesquisados, as organizações devem aumentar seus investimentos em melhorias nas políticas de recursos humanos, particularmente em ações que promovam uma maior percepção de oportunidades de aprendizagem, reduzindo a intenção de rotatividade de seus talentos. Design/metodologia/abordagem: Esta pesquisa foi desenvolvida com abordagem quantitativa e coleta de dados realizada por meio de um survey. Aplicaram-se os questionários a 250 profissionais atuantes no mercado de trabalho e estudantes de uma universidade privada. A análise dos dados foi realizada com uma análise fatorial confirmatória e, na sequência, uma modelagem de equações estruturais. Resultados: Os autores apresentaram os resultados da investigação de forma descritiva. As três hipóteses definidas para o estudo foram aceitas, e foram consideradas significantes as dimensões das políticas de recursos humanos. Os autores apresentaram atributos relevantes para a compreensão de que, mesmo existindo diversos motivos que possam influenciar um profissional em sua decisão de desligar-se da organização, novos fatores devem ser considerados, como as possibilidades de uma maior oferta de conhecimento.

Abstract Purpose: The objective of this research is to investigate how human resources policies and the perception of learning opportunities in organizations influence the intention of professional turnover. Originality/value: The authors demonstrated that, by understanding the existing relationships between the researched constructs, organizations should increase their investments in improvements in human resources policies, particularly in actions that promote a greater perception of learning opportunities, which reduce the intention of employee turnover of their talents. Design/methodology/approach: This research was developed with a quantitative approach and data collection was carried out through a survey. The questionnaires were applied to 250 professionals working in the labor market and students from a private university. Data analysis was performed with a confirmatory factor analysis and, subsequently, a structural equation modeling. Findings: The authors presented the research results in a descriptive way, the three hypotheses defined for the study were accepted, and the dimensions of human resources policies were considered significant. The authors presented relevant attributes for the understanding that, even though there are several reasons that can influence a professional in his decision to leave the organization, new factors must be considered, such as the possibilities of a greater offer of knowledge.

https://doi.org/10.1590/1678-6971/eramg220210.en

10.

Chemical study of Adenocalymma axillarum crude leaf extract and isolated compounds
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Andrade, João Paulo Campos

; Alves, Osvaine Junior Alvarenga

; Costa, Marian Caroline

; Gimenez, Valéria Maria Melleiro

; Squarisi, Iara Silva

; Nicolella, Heloiza Diniz

; Pagotti, Mariana Cintra

; Tavares, Denise Crispim

; Cunha, Wilson Roberto

; Silva, Márcio Luís Andrade e

; Januario, Ana Helena

; Magalhães, Lizandra Guidi

; Pauletti, Patrícia Mendonça

Brazilian Journal of Pharmaceutical Sciences

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2022, Volume 58 elocation e20278

Abstract: En | Text: En | PDF: En

Abstract Adenocalymma axillarum (K.Schum.) L.G. Lohmann is a liana belonging to the family Bignoniaceae. In traditional medicine, the genus Adenocalymma is used to treat fever, skin ailments, and body, joint, and facial muscle pains, and it is also applied as cosmetic. Biological assays conducted with the A. axillarum crude leaf ethanol extract have indicated leishmanicidal activity and absence of cytotoxicity. This study aimed to analyze the A. axillarum leaf ethanol crude extract by high-performance liquid chromatography-high-resolution mass spectrometry- diode array detector (HPLC-HRMS-DAD) and to evaluate the leishmanicidal and cytotoxic activities of this crude extract, its fractions, and isolated compounds. HPLC-HRMS-DAD analysis of this extract revealed that it consisted mainly of flavonoids, with nine major compounds. Extract purification yielded 4-hydroxy-N-methylproline, 6-β-hydroxyipolamiide, quercetin-3-O-robinobioside, hyperin, isorhamnetin-3-O-robinobioside, and 3’-O-methylhyperin, which were identified by Nuclear Magnetic Resonance. The isolated compounds were inactive against Leishmania amazonensis promastigotes and human lung fibroblast cells.

https://doi.org/10.1590/s2175-97902022e20278

11.

Medición del Impacto de la Ley de Transparencia y Acceso a la Información Pública en el Paraguay,
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Achar Rojas, Juan Pablo

; Vargas Ferreira, Sebastián

; Godoy Alvarenga, Pedro Joaquín

; Céspedes Atlasovich, Natalia I.

; Agüero Duarte, Francisco Javier

; Molinas, Derlis Santiago

; Estigarribia Ruiz Díaz, Ricardo A.

Revista Internacional de Investigación en Ciencias Sociales

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dec 2021, Volume 17 N. 2 Pages 305 - 330

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

ABSTRACT This research refers to the impact on the social environment of the subjects affected by the Transparency Law of Paraguay. The research consists of the analysis of the results of the application of two instruments, on the one hand, a survey of applied to 387 subjects and; on the other, a semi-structured questionnaire applied to 12 key informants, referents of the academy and the public service. The results of the research highlight the interesting level of knowledge that the population has about the existence of the law and its contents, the experts' vision of the important contribution that the Law has made to the improvement of transparency, accountability and Democratization in general. It also highlights the need to train people so that they can make effective use of the tools provided by the Law and the need to have civil society articulations for the analysis of the information made available by state agencies and entities. Key words: Transparency. Public information. Paraguay. Law impact. State.

RESUMEN La presente investigación se refiere al impacto ocurrido en el ambiente social de los sujetos afectados por la Ley de Transparencia en Paraguay. La investigación se compone por el análisis de resultados de la aplicación de dos instrumentos, por una parte, una encuesta aplicada a 387 sujetos y; por la otra, un cuestionario semiestructurado aplicado a 12 informantes claves, referentes a la academia y la función pública. Entre los resultados de la investigación se destaca el interesante nivel de conocimiento que tiene la población sobre la existencia de esta ley y su contenido, la visión de los expertos sobre importantes aportes que ha hecho la Ley por la mejora de la transparencia, la rendición de cuentas y la democratización en general. También se evidencia la necesidad de capacitar a la gente para que pueda hacer uso efectivo de las herramientas dispuestas por la Ley y la necesidad de contar con articulaciones de la sociedad civil para el análisis de la información puesta a disposición por los organismos y entidades del Estado.

https://doi.org/10.18004/riics.2021.diciembre.305 29 downloads

12.

Yield of ‘Gigante’ cactus pear cultivated under biofertilizer doses and application intervals
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Fonseca, Varley A.

; Rodrigues, Carlindo S.

; Alvarenga, Rodrigo R.

; Santos, Delfran B. dos

; Bebé, Felizarda V.

; Pina, Douglas S.

Revista Brasileira de Engenharia Agrícola e Ambiental

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sep 2021, Volume 25 N. 9 Pages 633 - 640

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

RESUMO A restrição hídrica associada ao elevado custo de fertilizantes, bem como, a necessidade de produzir forragem na região semiárida faz com que estudos utilizando biofertilizantes na produção de palma forrageira tendam a se tornarem impactantes. Objetivou-se com o presente estudo avaliar as características morfométricas e o rendimento de palma forrageira ‘Gigante’ cultivada sob doses e intervalos de aplicação de biofertilizante de esterco bovino. O delineamento experimental foi em blocos casualizados, no esquema fatorial 2 × 5, sendo dois intervalos de aplicação de biofertilizante (14 e 21 dias) e cinco doses de biofertilizante (0, 15, 30, 45 e 60 m3 ha-1). Foram utilizadas três repetições, totalizando 30 unidades experimentais. Foram avaliadas as seguintes variáveis: altura da planta, número de cladódios, comprimento, largura e índice de área de cladódio, percentagem de matéria seca, produtividade de biomassa verde e seca. A utilização de 60 m3 ha-1 de biofertilizante de esterco bovino liquido incrementa o rendimento da palma forrageira ‘Gigante’. A aplicação de 60 m3 ha-1 de biofertilizante no intervalo de 14 dias incrementa o rendimento da palma forrageira ‘Gigante’.

ABSTRACT Due to the water restriction, associated with the high cost of fertilizers, and the need to produce forage in the semi-arid regions, studies using biofertilizers in cactus pear production tend to become impactful. The aim of this study was to evaluate the morphometric characteristics and yield of ‘Gigante’ cactus pear cultivated under doses and application intervals of bovine manure biofertilizer. The experimental design was in randomized blocks, in a 2 × 5 factorial scheme, with two biofertilizer application intervals (14 and 21 days) and five biofertilizer doses (0, 15, 30, 45 and 60 m3 ha-1). Three replicates were used, totaling 30 experimental units. The following variables were evaluated: plant height, number of cladodes, cladode length, cladode width and cladode area index, dry biomass percentage, and green and dry biomass yields. The use of 60 m3 ha-1 of liquid cattle manure biofertilizer increased the yield of ‘Gigante’ cactus pear. The application of 60 m3 ha-1 of biofertilizer at the interval of 14 days increased the yield of ‘Gigante’ cactus pear.

https://doi.org/10.1590/1807-1929/agriambi.v25n9p633-640 125 downloads

13.

Aislamiento e identificación de microorganismos amilolíticos y tolerantes a cianuro de efluentes de la industria almidonera
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Barua, Ramona C.

; Kolman, María A.

; Aguila, Marina S.

; Zapata, Pedro D.

; Alvarenga, Adriana E.

Revista de Ciencia y Tecnología

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jun 2021, N. 35 Pages 1 - 10

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

Abstract Cassava cultivation in the Misiones province largely contributes to the national production. Part of it is used to obtain starch, which generates industrial effluents with a high load of organic matter and cyanogenic compounds. This constitutes a problem at the environmental level and bioremediation is presented as an alternative to reduce this waste, since it is based on the degradation of the pollutant using microorganisms present in the contaminated matrix. The objective of this work was to isolate microorganisms with starch degradation capacity and tolerance to cyanide from effluents of the starch industry. We isolated 93 bacterial strains and 15 were preselected by qualitative determination of amylolytic activity. Using the 16S rDNA gene for molecular identification, it was determined that some of these isolates belong to the genera Pseudomonas, Acinetobacter and Proteus. These strains were cultivated in minimal medium with different cyanide concentrations and it was possible to determine that one of them has amylolytic activity and tolerance to cyanide, both desirable characteristics for bioremediation of effluents from the cassava starch industry.

Resumen El cultivo de mandioca en la Provincia de Misiones aporta la mayor parte de la producción a nivel nacional. Parte de la misma es destinada a la obtención de fécula, actividad que genera efluentes industriales con una elevada carga de materia orgánica y compuestos cianogénicos. Esto constituye una problemática a nivel ambiental y la biorremediación se presenta como una alternativa para la reducción de estos residuos, ya que se basa en la degradación del contaminante utilizando los microorganismos presentes en la matriz contaminada. El objetivo de este trabajo fue aislar microorganismos con capacidad para degradar almidón y tolerantes a cianuro a partir de efluentes de una industria almidonera. Fueron aisladas93 cepas bacterianas y 15 de ellas fueron preseleccionadas mediante determinación cualitativa de actividad amilolítica. Utilizando el gen 16S rDNA para la identificación molecular, se determinó que algunos de estos aislamientos pertenecen a los géneros Pseudomonas, Acinetobactery Proteus. Esas cepas se cultivaron en medio mínimo con distintas concentraciones cianuro y se logró determinar que una de ellasposee tanto la actividad amilolítica como la tolerancia a cianuro, ambas características deseables para biorremediación de efluentes de la industria almidonera.

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14.

USE OF REMOTELY PILOTED AIRCRAFTS FOR THE APPLICATION OF PLANT PROTECTION PRODUCTS
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Cunha, João P. A. R. da

; Alvarenga, Cleyton B. de

; Rinaldi, Paula C. N.

; Marques, Matheus G.

; Zampiroli, Renan

Engenharia Agrícola

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apr 2021, Volume 41 N. 2 Pages 245 - 254

Abstract: En | Text: En | PDF: En

ABSTRACT The use of remotely piloted aircrafts (RPAs) to apply plant protection products has grown a lot in agriculture worldwide. However, little research data are available regarding the efficiency and safety of this method, especially in Brazil. Thus, this review aimed to present the current scenario of scientific research involving RPAs in the application of pesticides. Several factors interfere with the quality of this type of application. Among them are height and flight speed, droplet generator elements, application rate, and spray solution properties. In general, applications have been performed between 1.0 m and 3.0 m of height and 1.0 m s-1 and 7.0 m s-1 of speed. As for the droplet generator element, there is still no clarity as to the ideal system. Efficacy studies involving RPA applications demonstrate the potential of this method in replacing applications performed mainly by using knapsack equipment in an effort to reduce occupational risks. However, it is essential to observe the advantages of RPA use, while also taking into account the risk of drift. The aerodynamic effect in the droplets, qualified personnel, appropriate formulations, regulations, and details in labels are challenges that still need to be addressed for this new technology to be successful.

https://doi.org/10.1590/1809-4430-eng.agric.v41n2p245-254/2021 406 downloads

15.

First record of Anastrepha obliqua (Diptera: Tephritidae) and a tritrophic relation with parasitoids in a citrus orchard in Pará state, Brazil
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RODRIGUES, Marlon Gonçalves

; CAMARGOS, Maria Gisely

; ALVARENGA, Clarice Diniz

; SILVA, Rosana Cardoso Rodrigues da

; AYRES, Álvaro Remígio

Acta Amazonica

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mar 2021, Volume 51 N. 1 Pages 30 - 33

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

RESUMO A citricultura está crescendo no Estado do Pará, Brasil, mas faltam informações sobre as pragas conhecidas como moscas-das-frutas e os parasitoides associados na região. Visando abordar esta lacuna no conhecimento, foram coletados frutos de laranja (Citrus sinensis), laranja var. lima (C. sinensis), lima-da-pérsia (C. limettioides), limão-cidra (C. medica) e tangerina (C. reticulata). Registramos, pela primeira vez, infestação em condições naturais de campo por Anastrepha obliqua em C. sinensis no Pará e identificamos uma tritrófica entre C. sinensis, A. obliqua e os parasitoides Opius bellus e Asobara anastrephae.

ABSTRACT Citriculture is a growing industry in Pará state, Brazil, but information regarding fruit flies and their associated parasitoids in this region is lacking. To address this gap in knowledge, we collected oranges (Citrus sinensis), lime oranges (C. sinensis), common sweet limes (C. limettioides), citrons (C. medica) and mandarins (C. reticulata). We recorded field infestation by Anastrepha obliqua in C. sinensis under natural conditions for the first time in the study region, and a tritrophic relationship between C. sinensis, A. obliqua, and the parasitoids Opius bellus and Asobara anastrephae was identified.

https://doi.org/10.1590/1809-4392202002961 559 downloads

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