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Resumo As comunidades quilombolas, estão presentes em diversos estados brasileiros, vivendo em condições de saúde mais precárias. Isto ocorre por conta do isolamento geográfico, das limitações de acesso e da falta de qualidade no serviço quando este é prestado. Nesse sentido, o objetivo do estudo foi analisar a qualidade de vida de mulheres de uma comunidade quilombola do nordeste brasileiro. Estudo observacional, transversal e descritivo. Foram entrevistadas 160 mulheres adultas, através de um formulário para a coleta de perfil e do questionário de Qualidade de Vida WHOQOL – bref. Foi observado que as mulheres tinham em média 40,7 anos (±17,25), casadas, autodeclaradas negras, com fundamental incompleto, do lar, sem renda, com moradia de alvenaria, própria, com até 6 cômodos, abastecidas por caixa de água comunitária, tratada. A Qualidade de Vida, apresentou escores medianos nos domínios: físico (3,18), psicológico (3,4), relações sociais (3,45) e meio ambiente (2,59). Com a realização desta pesquisa foi possível caracterizar a comunidade quilombola de Santa Luzia do Norte-AL quanto as dificuldades de acesso a saúde e geração de renda, fatos que repercutem na sua condição de saúde. Os problemas descritos neste estudo podem contribuir para que ações de saúde sejam planejadas e efetivadas com o intuito de melhorar as condições socioeconômicas e de saúde nessa comunidade, considerando-se o contexto social, político e ambiental, valorizando seus saberes e práticas tradicionais.

Abstract Quilombola communities are present in many Brazilian states living in precarious health conditions. This is due to geographic isolation, limitations to the access of the area in which they live in, and the lack of quality in the service when it is needed to be provided. Therefore, the aim of this study was to analyze the quality of life of women from a quilombola community in northeastern Brazil. It is an observational, cross-sectional and descriptive study. 160 adult women were first interviewed through a form to collect a profile and then it was applied the WHOQOL Quality of Life questionnaire – bref. It was observed that the women were on average 40.7 years old (±17.25), married, self-declared black, who did not finish elementary school, housewife, had no income, with their own masonry house, with up to 6 rooms, supplied by a box of community treated water. Quality of Life had median scores in the domains: physical (3.18), psychological (3.4), social relationships (3.45) and environment (2.59). With this research, it was possible to characterize the quilombola community of Santa Luzia do Norte-AL regarding the difficulties of access to health and income generation, issues that affect their health condition. The problems described in this study can contribute to health actions being planned and carried out in order to improve socioeconomic and health conditions in this community, considering the social, political and environmental context, valuing their traditional knowledge and practices.

https://doi.org/10.1590/1519-6984.246463

Microbiological characteristics of bloodstream infections in a reference hospital in northeastern Brazil
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Melo, M. C.

; Carvalho Neto, A. P. M.

; Maranhão, T. L. G. Q.

; Costa, E. S.

; Nascimento, C. M. A.

; Cavalcanti, M. G. S.

; Ferreira-Júnior, G. C.

; Rocha, M. A. N.

; Silva, K. M.

; Santos Júnior, C. J.

; Rocha, T. J. M.

Brazilian Journal of Biology

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2024, Volume 84 elocation e253065

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

Resumo A cultura sanguínea de rotina é usada para a detecção de infecções na corrente sanguínea por bactérias aeróbias e anaeróbias e por leveduras patogênicas comuns. Estudo retrospectivo realizado em hospital público de Maceió-AL, por meio da coleta de dados de todos os prontuários com culturas sanguíneas positivas. Das 2.107 culturas sanguíneas realizadas, 17% foram positivas com Staphylococcus coagulase negativo (51,14%), seguido por Staphylococcus aureus (11,21%) e Klebsiella pneumoniae (6,32%). As bactérias Gram-positiva predominaram entre as culturas de sangue positivas, destacando-se o grupo das Staphylococcus coagulase-negativo. Enquanto as bactérias Gram-negativas apresentaram um número maior de espécies entre as culturas de sangue positivas.

Abstract Routine blood culture is used for the detection of bloodstream infections by aerobic and anaerobic bacteria and by common pathogenic yeasts. A retrospective study was conducted in a public hospital in Maceió-AL, by collecting data of all medical records with positive blood cultures. Out of the 2,107 blood cultures performed, 17% were positive with Staphylococcus coagulase negative (51.14%), followed by Staphylococcus aureus (11.21%) and Klebsiella pneumoniae (6.32%). Gram-positive bacteria predominated among positive blood cultures, highlighting the group of Staphylococcus coagulase-negative. While Gram-negative bacteria had a higher number of species among positive blood cultures.

https://doi.org/10.1590/1519-6984.253065 1 downloads

Habitual physical activity and sedentary behavior as predictors of dynapenia in older adults: a cross-sectional study
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Santos, Lucas dos

; Almeida, Cláudio Bispo de

; Valença Neto, Paulo da Fonseca

; Silva, Rizia Rocha

; Santos, Isaac Costa

; Casotti, Cezar Augusto

Sao Paulo Medical Journal

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2024, Volume 142 N. 1 elocation e2023070

Abstract: En | Text: En | PDF: En

ABSTRACT BACKGROUND: Dynapenia is a risk factor of mortality. Therefore, the development of low-cost and easy-to-apply tools is essential to optimize the health surveillance actions of older people. OBJECTIVES: To compare the time spent on habitual physical activity (HPA) and sedentary behavior (SB) among dynapenic and non-dynapenic older adults and ascertain the predictive ability of these behaviors on outcome. DESIGN AND SETTING: A cross-sectional population epidemiological survey was conducted involving 208 older adults. METHODS: HPA and SB were quantified using the International Physical Activity Questionnaire, and dynapenia was identified by handgrip strength (women: 18.37 kgf; men: 26.75 kgf). RESULTS: The prevalence was 24.50%. In both sexes, dynapenic individuals reported a HPA median time of 70.00 minutes/week (min/wk), while non-dynapenic women and men reported HPA median times of 240.00 and 280.00 min/wk, respectively (P < 0.05). For SB among dynapenic individuals, a median of 388.75 min/day was observed in women and 428.57 min/d in men. In contrast, non-dynapenic women and men had 291.42 and 274.28 min/day in SB (P < 0.05), respectively. The best cutoff HPA to discriminate the outcome was 150.00 min/wk in women (sensitivity: 73.30%; specificity: 60.67%) and 140.00 min/wk in men (sensitivity, 71.43%; specificity, 61.54%). The best cutoff SB was 381.43 min/day in women (sensitivity, 53.30%; specificity, 84.80%) and 351.43 min/day in men (sensitivity, 71.43%; specificity, 73.85%). CONCLUSION: Older individuals with dynapenia spent less time on HPA and more time in SB. Furthermore, HPA was found to be a better discriminator of dynapenic individuals, and SB better discriminated non-dynapenic individuals.

https://doi.org/10.1590/1516-3180.2023.0070.r1.190523

Seasonal and Circadian Evaluation of the Pectis brevipedunculata Essential Oil and Its Acaricidal Activity against Rhipicephalus microplus (Acari: Ixodidae)
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Camara, Marcos B. P.

; Lima, Aldilene S.

; Jumbo, Luis Oswaldo V.

; Tavares, Caio P.

; Mendonça, Cáritas de Jesus S.

; Monteiro, Odair S.

; Araújo, Sabrina Helena C.

; Oliveira, Eugênio Eduardo de

; Lima Neto, José S.

; Maia, José Guilherme S.

; Costa Junior, Livio M.

; Rocha, Cláudia Q. da

Journal of the Brazilian Chemical Society

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jul 2023, Volume 34 N. 7 Pages 1020 - 1029

Abstract: En | Text: En | PDF: En

Pectis brevipedunculata is native species and widely available in dry and semi-arid ecosystems showing high biotechnological potential. The objective of this study was to evaluate the circadian and seasonal chemical variation of the essential oil (EO) of P. brevipedunculata, as well as its acaricide effect on Rhipicephalus microplus larvae. Aerial parts were collected and submitted to the hydrodistillation process, and the chemical composition was determined by gas chromatography mass spectrometry (GC-MS). For the assays with R. microplus, the larval immersion test was performed. The main constituents were citral (75% of the EO), followed by α-pinene and limonene. In the seasonality analysis, the highest yields were in the months of April (2.08%) and August (2.05%), while in the study of circadian rhythm, the percentage was 2.0% at 6 p.m. in the rainy season, and 1.2%, dry season at 6 p.m. Concerning acaricidal activity (50% lethal concentration (LC50)), the April (1.17 mg mL-1), March (1.28 mg mL-1), June (1.37 mg mL-1), and October (1.27 mg mL-1) oils obtained were the most active and assays performed with circadian rhythm revealed in the rain season (April) at 6 p.m. and dry season (September) at 12 a.m. LC50 values of 1.75 and 1.75 mg mL-1, respectively. Additionally, this EO is selective to non-target organisms, i.e., ladybeetles and lacewing.

https://doi.org/10.21577/0103-5053.20230017

Thermal synthesis of NiMn2O4 spinel employing Mn oxide ores as starting material
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Nascimento, R. S.

; Figueira, B. A. M.

; F. Neto, E.

; Rabelo, A. A.

; Fernandez, O. J. C.

; Luz, P. T. S. da

; Costa, M. L. da

Cerâmica

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apr 2023, Volume 69 N. 390 Pages 154 - 160

Abstract: En | Text: En | PDF: En

Abstract It is described for the first time the synthesis and characterization of NiMn2O4 employing the Mn ores from the Amazon Region as starting material, instead of using commercial reagents as normally occurs in its synthesis process. Initially, an Mn ore was transformed into a single product, the octahedral layer (OL) manganese oxide with Ni2+ ions interlayer (Ni-OL-2), which was used as a matrix to obtain NiMn2O4 by thermal decomposition. The following techniques were used for characterization: X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), infrared spectroscopy (FTIR), thermal analysis (TG-DTA), scanning (SEM) and transmission (TEM) electron microscopies. The results revealed that Mn oxide ore composed of nsutite mineral transformed into a well-ordered crystalline Ni-OL-2 phase, after the hydrothermal and cation exchange process. The thermal decomposition of Ni-OL-2 produced the nickel manganite phase at 850 °C with spherical ball morphology and crystal sizes in the range of 200-300 nm.

https://doi.org/10.1590/0366-69132023693903436

A Reconfigurable Frequency Selective Surface for Wi-Fi Application
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Evangelista, Thamyris da Silva

; Mamedes, Deisy Formiga

; Silva, Jefferson Costa e

; Serres, Alexandre Jean René

; Gomes Neto, Alfredo

Journal of Microwaves, Optoelectronics and Electromagnetic Applications

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mar 2023, Volume 22 N. 1 Pages 33 - 46

Abstract: En | Text: En | PDF: En

Abstract This work presents the development of a reconfigurable frequency selective surface (RFSS) for application in the 2400-2483.5 MHz band, standard IEEE 802.11b/g/n (Wi-Fi). The proposed RFSS is based on the four-arms star geometry and PIN diodes were used as switching elements. In the initial design, numerical and measured results, especially for y polarization, PIN diode on-state, shown a difference of 15% for the resonant frequency. To overcome this drawback, a scaling factor was adopted and RFSS was redesigned and characterized, achieving the desired frequency response. The RFSS reconfigurability is confirmed, with a variation of at least 15 dB, when switching the states of the PIN diode. Moreover, the signal strength was measured directly on a notebook, confirming the reconfiguration of the RFSS. Finally, for the y polarization, it was found that for this polarization the frequency response remains virtually unchanged, even for angles of incidence up to 45°. In addition to the Wi-Fi signal control, the observed features make the developed RFSS especially attractive for reconfigurable antennas applications.

https://doi.org/10.1590/2179-10742023v22i1260442

Could the radiographic image quality be affected by the excessive use of the photostimulable phosphor plate?
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Ruiz, Débora Costa

; Gomes, Amanda Farias

; Fontenele, Rocharles Cavalcante

; Haiter Neto, Francisco

; Freitas, Deborah Queiroz

; Groppo, Francisco Carlos

Brazilian Dental Journal

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feb 2023, Volume 34 N. 1 Pages 39 - 44

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

Abstract The study aimed to assess the influence of excessive use of a photostimulable phosphor plate (PSP) on the density, image noise, and contrast of radiographs. For that, radiographs of an acrylic block were acquired with a PSP of the Express intraoral system to assess the density and image noise. Initially, five images were obtained and exported (first group). After 400 exposures to X-rays and scannings of PSP, other five images were obtained and exported (second group). The same procedure was done after 800 (third group), 1200 (fourth group), 1600 (fifth group), and 2000 acquisitions (sixth group), resulting in 30 images to be evaluated. The mean and standard deviation of the gray values were calculated for the images using the ImageJ software. For contrast analysis, radiographs of an aluminum step-wedge were acquired with a new PSP following the same acquisition intervals. The percentage of contrast variation was calculated. Another two unused PSP receptors were employed to evaluate the method’s reproducibility. The comparison of the results among the acquisition groups was performed with one-way Analysis of Variance (α=0.05). Intraclass Correlation Coefficient (ICC) assessed the reproducibility of the receptors. Image noise did not differ among the groups (p>0.05). There was a slight increase in density after 400 acquisitions and a slight difference in contrast for all acquisition groups without a pattern of increase or decrease (p<0.05). ICC showed excellent reliability for the methods. Therefore, excessive PSP use slightly affected the radiograph’s density and contrast.

Resumo Objetivou-se avaliar a influência do uso excessivo de uma placa de fósforo fotoestimulável (PSP) na densidade, ruído e contraste das radiografias. Foram adquiridas radiografias de um bloco de acrílico com uma PSP do sistema intraoral Express para avaliar a densidade e o ruído da imagem. Inicialmente, cinco imagens foram obtidas e exportadas (primeiro grupo). Após 400 exposições aos raios X e escaneamentos, outras cinco imagens foram obtidas e exportadas (segundo grupo). O mesmo procedimento foi feito após 800 (terceiro grupo), 1200 (quarto grupo), 1600 (quinto grupo) e 2000 aquisições (sexto grupo), resultando em 30 imagens a serem avaliadas. A média e o desvio padrão dos valores de cinza foram calculados para as imagens usando o software ImageJ. Para análise de contraste, foram adquiridas radiografias de uma escala de alumínio com uma nova PSP seguindo os mesmos intervalos de aquisição. A porcentagem de variação do contraste foi calculada. Outras duas PSP sem uso prévio foram utilizadas para avaliar a reprodutibilidade dos métodos. A comparação dos resultados entre os grupos de aquisição foi realizada pela Análise de Variância one-way (α=0,05). O Coeficiente de Correlação Intraclasse (ICC) avaliou a reprodutibilidade dos receptores. O ruído da imagem não diferiu entre os grupos (p>0,05). Houve um leve aumento na densidade após 400 aquisições e uma pequena diferença no contraste para todos os grupos de aquisição sem padrão de aumento ou diminuição (p<0,05). O ICC mostrou excelente confiabilidade para os métodos. Portanto, o uso excessivo da PSP afetou levemente a densidade e o contraste radiográfico.

https://doi.org/10.1590/0103-6440202305225

Increased expression of matrix metalloproteinases 2 and 9 as poor prognosis factor for Hodgkin’s lymphoma patients
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Silva, Bárbara de Oliveira

; Medeiros, Jonathan Wagner

; Albuquerque, Giwellington Silva

; Valderrama, Pavel Medina

; Barbosa, Athos Henrique de Quevedo

; Souza, Juliana Maria de

; Oliveira, Renata Santos

; Morais, Adriana Lins

; Silva Neto, Jacinto da Costa

; Muniz, Maria Tereza Cartaxo

Jornal de Pediatria

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jan 2023, Volume 99 N. 1 Pages 59 - 64

Abstract: En | Text: En | PDF: En

Abstract Objective: The aim of our study was to evaluate the expression of MMP-2 and MMP-9 as a prognostic factor in patients diagnosed with Hodgkin Lymphoma (HL). Methods: In the present study, 45 paraffin biopsies from patients up to 19 years old diagnosed with HL were used in two referral hospitals in the state of Pernambuco, Brazil. Risk groups were classified into favorable and unfavorable, according to Ann Arbor. The expression of matrix metalloproteinases 2 and 9 and their inhibitors was performed by immunohistochemistry (IHC). Data were analyzed using the GraphPad Prism 5 program. Results: MMP-2 intensity pattern was stronger (> 10% of the total field) in patients with stage III/ IV and B symptoms. MMP-2 showed an association with the risk group (p = 0.0388). That is, the stronger the MMP-2 marking, the greater the unfavorable risk. However, for MMP-9 there was no difference in the stronger intensity pattern in relation to stages I/II and III/IV, only in the presence of B symptoms. MMP-9 showed an association with B Symptoms (p = 0.0411). Therefore, patients with B symptoms have higher MMP-9 expression. Conclusion: Our results suggest that MMP-2 expression is associated with HL progression. While MMP-9 expression is related to the clinical worsening of these patients. However, further studies are needed to evaluate the exact role of these proteins in hematologic malignancies.

https://doi.org/10.1016/j.jped.2022.05.004

Factors associated with medical errors in perioperative anesthetic practice: cross-sectional study practice crosssectional cross sectional
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Oliveira Junior, João Marcos do

; Santos Neto, Lauro Ferreira dos

; Duarte, Tiago Braga

; Carmona, Bruno Mendes

; Costa, Luís Vinícius Pires da

; Tramontin, Daniela Ferreira

; Santos, Deivid Ramos dos

; Corrêa, Lauriana Marques

Brazilian Journal of Anesthesiology

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jan 2023, Volume 73 N. 1 Pages 117 - 119

Abstract: En | Text: En | PDF: En

https://doi.org/10.1016/j.bjane.2022.07.004

10.

In vitro fertilization: an unexpected finding in a cohort of patients with biliary atresia
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Costa, C.M.

; Porta, A.

; Miura, I.K.

; Porta, G.

; Fonseca, E.A.

; Pugliese, R.

; Kondo, M.

; Chapchap, P.

; Sindhi, R.

; Feier, F.H.

; Seda Neto, J.

Brazilian Journal of Medical and Biological Research

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2023, Volume 56 elocation e12671

Abstract: En | Text: En | PDF: En

In biliary atresia (BA), efforts to prevent premature liver transplantation (LT) are aimed at early diagnosis, timing of Kasai-portoenterostomy (KPE), and centralization of care. This report presents the clinical picture, treatment strategies, and outcomes of BA patients with no previous treatment. A retrospective cohort study (Jan/2001 to Jan/2021) was conducted to evaluate the outcome of patients with BA referred to a single team. Study groups were: 1) Kasai-only group (K-only) n=9), 2) LT-only group (n=7), and 3) Kasai+LT group (K+LT) (n=23). Survival with native liver and overall survival were 22.9 and 94.8%, respectively, at 120 months of follow-up. There was no difference in age at KPE in the K-only group (46.8±21.8 days) vs K+LT (52.1±22 days), P=0.4. Ten (25.6%) patients were babies conceived through in vitro fertilization (IVF). Four IVF patients (40%) presented associated congenital heart disease vs 5 patients (17%) in the remaining group (P=0.14). Two of the IVF patients were premature (<37 weeks). Median maternal age at birth was 35 years (33 to 41 years). Excellent patient survival is expected for patients with BA with the available treatment strategies. IVF+BA was an unexpected prevalent association in this cohort, and further studies are required to better understand these findings.

https://doi.org/10.1590/1414-431x2023e12671

11.

Development and validation of liquid chromatography-tandem mass spectrometry method to quantify dasatinib in plasma and its application to a pharmacokinetic study
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Costa, Edlaine Rijo

; Castro, Thales Nascimento

; Gonçalves-de-Albuquerque, Cassiano Felippe

; Faria Neto, Hugo Caire de Castro

; Gonçalves, José Carlos Saraiva

; Estrela, Rita de Cássia Elias

Brazilian Journal of Pharmaceutical Sciences

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2023, Volume 59 elocation e21415

Abstract: En | Text: En | PDF: En

Abstract Dasatinib, a potent oral multi-targeted kinase inhibitor against Src and Bcr-Abl, can decrease inflammatory response in sepsis. A simple and cost-effective method for determination of an effective dose dasatinib was established. This method was validated in human plasma, with the aim of reducing the number of animals used, thus, avoiding ethical problems. Dasatinib and internal standard lopinavir were extracted from 180 uL of plasma using liquid-liquid extraction with methyl tert-butil ether, followed by liquid chromatography coupled to triple quadrupole mass spectrometry in multiple reaction monitoring mode. For the pharmacokinetic study, 1 mg/kg of dasatinib was administered to mice with and without sepsis. The method was linear over the concentration range of 1-98 ng/mL for DAS in mice and human plasma, with r2>0.99 and presented intra- and interday precision within the range of 2.3 - 6.2 and 4.3 - 7.0%, respectively. Further intra- and interday accuracy was within the range of 88.2 - 105.8 and 90.6 - 101.7%, respectively. The mice with sepsis showed AUC0-t = 2076.06 h*ng/mL and Cmax =102.73 ng/mL and mice without sepsis presented AUC0-t = 2128.46 h*ng/mL. Cmax = 164.5 ng/mL. The described analytical method was successfully employed in pharmacokinetic study of DAS in mice.

https://doi.org/10.1590/s2175-97902023e21415

12.

Plasma Deposition of Solid Lubricant Coating Using AISI1020 Steel Cathode Cylinders Technique
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Lima, L. L. F.

; Libório, M. S.

; Medeiros Neto, J. F.

; Coan, K. S.

; Rossino, L. S.

; Sousa, R. R. M.

; Barbosa, M. G. C. B

; Nascimento, R. M. do

; Feitor, M. C.

; Costa, T. H. C

Materials Research

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2023, Volume 26 elocation e20220623

Abstract: En | Text: En | PDF: En

The use of thin films as solid lubricating makes it an excellent option for controlling wear and friction under certain operating conditions, in addition to not harming the environment. Thus, this work aims to study plasma deposition with a cathodic cage of MoS2 thin films on AISI 1020 steel substrates. From the adaptation of the cathode Cage named cathode cylinders, the samples were treated in cathodic and floating potential with temperatures of 300 °C, 350 °C, and 400 °C in an argon atmosphere. After the treatments, they were subjected to chemical analysis by X-ray diffraction (XRD) and Raman spectroscopy, in addition to a calotest tribological test. Also, it was possible to quantify the coating thickness using scanning electron microscopy (SEM). In general, the results indicated success in the deposition of molybdenum disulfide in all samples treated at fluctuating potential, as it is possible to visualize in the XRD since it indicated the presence of peaks referring to MoS2 and its compounds, in addition to an expressive reduction in wear through the calotest test.

https://doi.org/10.1590/1980-5373-mr-2022-0623

13.

One Size Does Not Fit All: The Need to Rethink the Metabolic Syndrome in Women
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Almeida, Maria Cristina Costa de

; Castro, Marildes Luiza

; Espíndola Neto, Larissa

; Aranha, Luciana Nicolau

; Salim, Thaís

; Oliveira, Gláucia Maria Moraes de

International Journal of Cardiovascular Sciences

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2023, Volume 36 elocation e20230101

Abstract: En | Text: En | PDF: En

Abstract Metabolic syndrome (MetS) is increasing at epidemic proportions worldwide. MetS and its components are frequent among Brazilian women (41.8%). Women are affected by changes in adipose tissue distribution, lipid profile, insulin resistance (IR), and vascular remodeling during their lives. These changes result from the lack of estrogen after menopause. There have been various attempts to propose a uniform origin for the clustering of the MetS components, including genetics, IR, obesity, lifestyle, sleep disturbances, inflammation, fetal and neonatal programming, and disturbed circadian rhythm of the body functions. The proinflammatory and prothrombotic state in MetS is well-defined. Socioeconomic and lifestyle-related factors are also essential triggers of MetS, which is associated with a higher risk for coronary artery diseases (CAD) and stroke in women. Population measures in health and community medicine, such as continuing education on the importance of lifestyle change to reduce cardiovascular risks from early childhood, are fundamental strategies. Statins reduce high-sensitivity C-reactive protein blood levels and treat high cholesterol. According to the patient, hypoglycemic agents, such as dipeptidyl peptidase-4 (DPP-4) inhibitors, glucagon-like peptide-1(GLP-1a), and sodium-glucose transport protein 2 (SGLT2) inhibitors, in addition to metformin, have their indication due to their beneficial cardiometabolic and vascular effects. Angiotensin-converting enzyme inhibitor (ACEI) and angiotensin-receptor blocker (ARB) should be the first choice to treat hypertension in postmenopausal womem. The recognition of the different gender- and age-specific risk factors, allowing for specific and targeted interventions, is fundamental, especially for women.

https://doi.org/10.36660/ijcs.20230101

14.

Deep sea ecosystem exploration and ‘health check’: sampling strategy and methods applied during the iAtlantic_BR10_Petrobras cruise in the Santos Basin, Southwest Atlantic
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Perez, Jose Angel A.

; Barros Neto, Halésio M.C. de

; Arantes, Renata C.M.

; Gaurisas, Daniela Y.

; Silva, Camila F.

; Alves, Fernanda Maria M.

; Costa, Júlia A.

; Eloi, Paula D.C.

; Fonseca, Thayse S.

; Gavazzoni, Lucas

; Lonskis, Isabella da S.

; Nardi, Ricardo U.

; Nascimento, Pedro O.

; Rodrigues, João Vitor M.

; Santos, Ana Lara F. dos

; Santos, Edson C. dos

; Schroeder, Rafael

; Silva, Luis Carlos da

; Souza, Fernanda dos S.S. de

; Bernardino, Ângelo F.

; Cavalcanti, Guarani H.

; Lindner, Alberto

; Mahiques, Michel M. de

; Millo, Christian

; Reis, Priscila

; Sweetman, Andrew K.

; Roberts, J. Murray

Ocean and Coastal Research

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- SciELO Analytics

2023, Volume 71 elocation e23046

Abstract: En | Text: En | PDF: En

Abstract The iAtlantic Project has established an international collaborative strategy to improve mapping and characterization of deep and open ocean ecosystems in understudied regions of the Atlantic and evaluate their health. In December 2022, the first iAtlantic expedition in the South Atlantic set off to map and explore seafloor ecosystems in the Santos Basin slope (200-1,000 m depths) in collaboration with the Petrobras ‘Santos Basin - Regional Characterization Project.’ The 17-day ‘iAtlantic_BR10-Petrobras’ cruise was conducted on board the research vessel NPqHOc Vital de Oliveira (Brazilian Navy) and performed (a) water column structure characterization, (b) seafloor morphology mapping, (c) description of benthic habitats and communities by seafloor imagery and biological/ geological sampling, and (d) ex-situ experiments to assess the functioning of sedimentary ecosystems and their responses to climate-related environmental changes. This study describes the rationale behind the iAtlantic_BR10-Petrobras cruise science plan, reports its sampling strategy and methods, and summarizes its collected data and preliminary results.

https://doi.org/10.1590/2675-2824071.23069jaap

15.

Agronomic parameters of sugarcane under planting densities in different cultivation cycles
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Costa, J. E.

; Silva, J. H. B.

; Silva, I. D. N.

; Silva, G. M. L.

; Nascimento, R. R. A.

; Silva, J. S. L.

; Barbosa, J. M. S.

; Cardoso, E. V. B.

; Silva, A. V.

; Nascimento, M. A.

; Santos, J. P. O.

; Martins, A. H. P. C.

; Pereira Neto, F.

; Amorim, P. M. D.

; Silva, B. O. T.

; Almeida, L. J. M.

; Mielezrski, F.

Brazilian Journal of Biology

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2023, Volume 83 elocation e278007

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

Abstract Low density sugarcane plantation (LDSP) has been implemented by some sugarcane producers in Brazil, aiming to save seeds and operational costs. The study was carried out in the municipality of Areia, Paraíba, Brazil. Five planting densities were used, varying from 5 to 25 m-2 of buds arranged in randomized blocks, with four replications. Data were measured annually over three cultivation cycles (2017 to 2020), during which the field was fertilized with NPK and the harvests were carried out manually without prior burning. The lower planting density presents higher productivity only in the cane plant (101.03 t ha-1) due to the higher plant height (2.37 m) and the higher number of stalks (11 stalks m-2), suggesting that these variables are due to the greater availability of light, water and photosynthate. However, there is a drastic reduction in sugarcane yield for this lower population in the 2nd ratoon by up to 65.62%, which is correlated with number of stalks per meter. We demonstrate the agronomic viability of LDSP in the population of 10 buds m-2 in relation to conventional planting of sugarcane until the 2nd ratoon. Data are important for future studies to present additional considerations for other production factors, such as the effects of mechanized harvesting and the management of nutrients and water, assessing the sustainability of this large-scale planting system.

Resumo O método de plantio de cana-de-açúcar de baixa densidade (LDSP) vem sendo implementado por alguns produtores de cana-de-açúcar no Brasil, visando economia de sementes e custos operacionais. O estudo foi realizado no município de Areia, Paraíba, Brasil. Utilizou-se cinco densidades de plantio, variando de 5 a 25 m-2 de gemas dispostas em blocos casualizados, com quatro repetições. Os dados foram medidos anualmente ao longo de três ciclos de cultivo (2017 a 2020). Menor densidade de plantio mostrou maior produtividade (101,03 t ha-1) devido à maior altura de planta (2,37 m) e ao maior número de hastes (NS) (11 hastes m-2), sugerindo que essas variáveis são devido à maior disponibilidade de luz, água e fotoassimilados. No entanto, houve redução drástica na produtividade da cana-de-açúcar para esta população menor na 2ª soca em 65,62%, estando correlacionado com o número de colmos por metro. Demonstramos a viabilidade agronômica do LDSP em uma população de 10 gemas m-2 em relação ao plantio convencional de cana-de-açúcar até a 2ª soca. Os dados são importantes para que estudos futuros apresentem considerações adicionais sobre outros fatores de produção, como os efeitos da colheita mecanizada e do manejo de nutrientes e água, avaliando a sustentabilidade desse sistema de plantio em larga escala.

https://doi.org/10.1590/1519-6984.278007

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