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Abstract Forest fragments are susceptible to environmental shifts and this demands high phenotypic plasticity of the species growing in these areas. In this context, the objective of the present work was to study the phenotypic plasticity of copaíba (Copaifera langsdorffii Desf.) based on morphological and anatomical metrics of the leaflets of plants from six forest fragments. The leaflets of C. langsdorffii individuals of the different fragments did not show qualitative differences, nonetheless, they demonstrated quantitative plasticity. Stomatal density (p = 0.017), specific leaf area (p = 0.009), palisade parenchyma (p = 0.008) and relative water content (p = 0.002), indicated a high luminous, water and nutritional influence on the development of leaflets. Based on the dry mass of the leaflets and the thickness of the palisade parenchyma, the principal component analysis explained 57.43% of the differences found between the variables. The data presented here provides evidence of the phenotypic plasticity of C. langsdorffii which, although occurring in similar soils, showed significant quantitative differences in its morphoanatomical characters.

https://doi.org/10.1590/0001-3765202320210541

Post-discharge mortality in adult patients hospitalized for tuberculosis: a prospective cohort study
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Müller, A.M.

; Osório, C.S.

; Figueiredo, R.V.

; Silva, D.R.

; Dalcin, P.T.R.

Brazilian Journal of Medical and Biological Research

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2023, Volume 56 elocation e12236

Abstract: En | Text: En | PDF: En

Determining outcomes and predictors of mortality following discharge from tuberculosis (TB) hospitalization is crucial to establish health policies. The objective of this study was to analyze outcomes and, secondarily, predictors of mortality following discharge from TB hospitalization. This was a prospective cohort study of patients diagnosed with TB (all forms) discharged from the hospital who began treatment during hospitalization. Out of 169 subjects included, 38 died during the 13-months of follow-up, within a median of 3 months (95%CI: 1.49-4.51). In the multivariate analysis, the variables independently associated with death were age (HR=1.04, 95%CI: 1.01-1.06, P=0.001), presence of sputum production (HR=2.18, 95%CI: 1.09-4.34, P=0.027), and Charlson Comorbidity Index (HR=1.19, 95%CI: 1.04-1.36, P=0.015). In conclusion, post-discharge mortality in subjects hospitalized for TB was 22.5%, with mean survival of 4.6 months. The mortality was higher in older subjects, in those who reported sputum production, and in those with a high comorbidity index.

https://doi.org/10.1590/1414-431x2023e12236

Shortening critical period of weed control at soybean by residual herbicide mixtures
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Roncatto, Eduardo

; Barroso, Arthur A.M.

; Albrecht, Alfredo J.P.

; Novello, Bruna D.

; Silva, Renan G.

; Backes, Caroline B.W.

Advances in Weed Science

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2023, Volume 41 elocation e020220075

Abstract: En | Text: En | PDF: En

Abstract Background Weed interference in the early stages of soybean development can compromise its yield. The use of herbicides with residual effects at the time of sowing is an alternative to reduce weed density and emergence time, consequently, the damage caused by their interference. Therefore, weed development can be reduced, which can result in easier post-emergence control. The combination of herbicide modes of action extends the spectrum of control and delays herbicide resistance evolution. Objective This work aimed to determine the onset of the critical period of weed control (CPWC) from the application of residual herbicides mixtures at soybean sowing. Methods Two experiments were carried out in 2021/2022, the first in a conventional tillage system with increasing periods of soybean/weeds coexistence (14, 28, 42, and 56 days after crop emergence). The second experiment consisted of a no-tillage system with soybean/weeds coexistence for 30, 45, 60, 75, and 90 days after crop emergence. On the day of soybean sowing, mixtures of the herbicides diclosulam + pyroxasulfone, flumioxazin + pyroxasulfone and diuron + sulfentrazone were applied, in addition to the untreated check. Soybean yield was evaluated evaluated upon harvest and data compared by non-linear regressions to CPWC determination. Results The application of residual herbicides can allowing reduces losses relative to the untreated control by up to 57%. CPWC beginning can be extended from eight to forty days, depending on mixes and acceptable losses. Conclusions The use of the mixture of residual herbicides are a good option for weed interference reduction for soybean crop.

https://doi.org/10.51694/advweedsci/2023;41:00009

Predictors of mortality in critically ill patients with COVID-19 and diabetes
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Lázaro, A.P.P.

; Zaranza, M.S.

; Meneses, G.C.

; Aragão, N.L.

; Freire, M.V.P.

; Guimarães, Á.R.

; Beliero, A.M.

; Dantas, M.M.P.

; Forte, L.C.

; Martins, A.M.C.

; Daher, E.F.

; Albuquerque, P.L.M.M.

; Silva Júnior, G.B. da

Brazilian Journal of Medical and Biological Research

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2023, Volume 56 elocation e12728

Abstract: En | Text: En | PDF: En

The COVID-19 pandemic has challenged the entire world, and patients with diabetes mellitus (DM) have been particularly affected. We aimed to evaluate predictors of mortality during the first 30 days of hospitalization in critically ill patients with COVID-19 and comorbid DM. This prospective study included 110 critically ill patients admitted with COVID-19 infection. Thirty-two (29%) patients had a previous diagnosis of DM. Clinical variables, laboratory tests, and vascular biomarkers, such as VCAM-1, syndecan-1, ICAM-1, angiopoietin-1, and angiopoeitin-2, were evaluated after intensive care unit (ICU) admission. A comparison was made between patients with and without DM. No difference in mortality was observed between the groups (48.7 vs 46.9%, P=0.861). In the multivariate Cox regression analysis, VCAM-1 levels at ICU admission (HR: 1 [1-1.001], P<0.006) were associated with death in patients with DM. Among patients with DM, advanced age (HR 1.063 [1.031-1.096], P<0.001), increased Ang-2/Ang-1 ratio (HR: 4.515 [1.803-11.308] P=0.001), and need for dialysis (HR: 3.489 [1.409-8.642], P=0.007) were independent predictors of death. Higher levels of VCAM-1 in patients with DM was better at predicting death of patients with severe COVID-19 and comorbid DM, and their cut-off values were useful for stratifying patients with a worse prognosis. Vascular biomarkers VCAM-1 and Ang-2/Ang-1 ratio were predictors of death in patients with severe COVID-19 and comorbid DM and those without DM. Additionally, kidney injury was associated with an increased risk of death.

https://doi.org/10.1590/1414-431x2023e12728

Clinical and morphological features of large-cell neuroendocrine carcinomas and small-cell lung carcinomas expressing the DLL3 and ASCL1 oncoproteins
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Prieto, T.G.

; Baldavira, C.M.

; Machado-Rugolo, J.

; Olivieri, E.H.R.

; Silva, E.C.A. da

; Silva, V.G.

; Ab'Saber, A.M.

; Takagaki, T.Y.

; Capelozzi, V.L.

Brazilian Journal of Medical and Biological Research

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2023, Volume 56 elocation e12921

Abstract: En | Text: En | PDF: En

Abstract Intratumoral similarities and differences between large-cell neuroendocrine carcinomas (LCNECs) and small-cell lung carcinomas (SCLCs) are determined partially by the Notch signaling pathway, which controls the switch from neuroendocrine to slight/non-neuroendocrine cell fate. LCNECs are divided into two subgroups according to genomic alterations: type I LCNECs exhibit a neuroendocrine profile characterized by achaete‐scute homolog 1 (ASCL1)high/delta-like protein 3 (DLL3)high/NOTCHlow and type II LCNECs show the pattern ASCL1low/DLL3low/NOTCHhigh. Here, we used immunohistochemistry, transmission electron microscopy, and digital analysis to examine the role of the Notch ligand DLL3 as an immunomarker of the neuroendocrine state and ASCL1 as a regulator of cell-cell interactions in SCLCs and LCNECs. High DLL3 and ASCL1 expression was associated with atypical submicroscopic characteristics involving nuclear size, chromatin arrangement, Golgi apparatus, and endoplasmic reticulum, and was characteristic of type I LCNECs with similarity to SCLCs, whereas low DLL3 and ASCL1 expression was found in both SCLCs and type II LCNECs. In patients diagnosed at an early stage who did not have metastasis and who underwent chemotherapy, DLL3high and ASCL1high SCLCs and type I LCNECs were associated with a better prognosis and a lower risk of death. The present findings suggested that DLL3/ASCL1 are potential therapeutic targets and prognostic indicators in patients with SCLCs or LCNECs.

https://doi.org/10.1590/1414-431x2023e12921

Different nutritional systems influence the tenderness and lipid oxidation of ewe lamb meat without altering gene expression
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SILVA, ISABELLA G.

; GIOMETTI, INES CRISTINA

; CASTILHO, CALIÊ

; SORIANO, GABRIELA A.M.

; SANTOS, ALINE O.

; GUIMARÃES, LETICIA J.

; SENA, GABRIELLA C.

; RÊGO, FABIOLA C.A.

; ZUNDT, MARILICE

Anais da Academia Brasileira de Ciências

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2023, Volume 95 Suppl. 2 elocation e20220562

Abstract: En | Text: En | PDF: En

Abstract Feeding is a determining factor in the various characteristics of sheep meat and animal performance, the objectives were to evaluate the effect of supplementation of ewe lambs finished in different nutritional planes on the gene expression of CASP3, CAPN1, CAPN2 and CAST and its possible association with meat quality. Samples of the Longissimus lumborum muscle of 24 ewe lambs were used, distributed in 3 groups (n=8): P (pasture), PS (pasture and supplement) and F (feedlot). Physicochemical analyses were performed for centesimal analysis, pH, lipid oxidation, Warner-Bratzler shear force and RT-qPCR for the analysis of relative gene expression of the following genes: CASP3, CAPN1, CAPN2 and CAST. There is an increase in daily weight gain and ethereal extract values in the meat of confined animals, due to the greater energy intake in the nutrition of these animals. Animals kept only on pasture have lower lipid oxidation in meat than other treatments because of the lower percentage of lipids. The Warner-Bratzler shear force is considerably higher in the meat of animals kept only on pasture but is still considered tender. The different nutritional systems do not interfere with the gene expression of CASP3, CAPN1, CAPN2 and CAST in ewe lambs.

https://doi.org/10.1590/0001-3765202320220562

Tensile bond strength of adhesive mortars with hydroxypropyl methyl cellulose and vinyl acetate-ethylene polymers after thermal storage
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KOTOVIEZY, LEIDIMARA A.M.

; PEREIRA, EDUARDO

; SILVA, ISAC J.

; COSTA, MARIENNE R.M.M.

; TRENTIN, PRISCILA O.

; MEDEIROS-JUNIOR, RONALDO A.

Anais da Academia Brasileira de Ciências

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2023, Volume 95 N. 3 elocation e20220856

Abstract: En | Text: En | PDF: En

Abstract The properties of adhesive mortars can change due to heating, compromising the durability of the coating systems. The aim of this article was to evaluate the influence of cement and polymer contents on the tensile bond strength of adhesive mortars after thermal storage. Ceramic tiling system specimens were prepared with seventeen formulations of adhesive mortars. These specimens were stored under dry (reference) at temperature of 23 ± 2 °C and 60 ± 5% of relative humidity and thermal (temperature of 70 ± 2 °C) conditions. The results showed that the cement content was the major factor concerning tensile bond strength. The vinyl acetate-ethylene (VAE) polymer improved the tensile bond strength of mortars under thermal storage. However, the hydroxypropyl methyl cellulose (HPMC) content contributed to the tensile bond strength only when higher cement contents were used. Besides, microstructure analysis showed that ettringite was degraded during thermal storage.

https://doi.org/10.1590/0001-3765202320220856

Dynamics of nuclear and cytoplasm maturation of bovine oocytes cultivated in vitro in medium supplemented with fulerol
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Palhares, R.C.F.T.

; Prata, V.M.

; Leite, A.C.

; Nunes, P.P.

; Leo, A.M.P.

; Ladeira, M.S.

; Silva, E.B.M.

; Borges, A.M.

Arquivo Brasileiro de Medicina Veterinária e Zootecnia

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dec 2022, Volume 74 N. 6 Pages 961 - 968

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

RESUMO O objetivo deste estudo foi avaliar, in vitro, a dinâmica da maturação nuclear e citoplasmática de oócitos bovinos em meio MIV tradicional (TC) e suplementado com fulerol (MF50), durante 36 horas. Na maturação nuclear do TC (n=300) e do MF50 (n=270) a cada seis horas, corados com Hoechst 33342, e na citoplasmática, avaliou-se a distribuição mitocondrial do TC (n=197) e do MF50 (n=159) a cada 12 horas, corados com Mitotracker Orange (Life® Technologies). Às seis horas, oócitos do TC (19%) se encontravam em MI (metáfase I), enquanto no MF50 estavam em VG (vesícula germinativa) ou QVG (quebra VG), repetindo com 12 horas. Às 18 horas, 46,3% estavam maturados no TC, e 20% no MF50. Com 24 horas, verificaram-se 43,9% de maturação no grupo MF50, e 63,8% no TC. Às 30 e 36 horas, o padrão de maturação foi estável, mas com início de degeneração oócitária. Houve retardo na maturação citoplasmática com 36 horas (P<0,05) no MF50 (53,9% de gametas maduros), comparado ao TC (69,8%). Com citoplasma imaturo, foram 10,4% e 31,7% para TC e MF50 (P<0,05), respectivamente. Conclui-se que o fulerol possivelmente interferiu na expansão das células do cumulus oophorus, bem como retardou a progressão meiótica e a maturação citoplasmática dos oócitos.

ABSTRACT The aim of this work was to evaluate, in vitro, the dynamics of nuclear and cytoplasmic maturation of bovine oocytes in traditional IVM medium (CT) and supplemented with fullerol (MF50), for 36 hours. The nuclear maturation of CT (n=300) and MF50 (n=270) every 6 hours, stained with Hoechst33342 and cytoplasmic, the mitochondrial distribution of CT (n=197) and MF50 (n=159) at every 12 hours, stained with Mitotracker Orange. At 6 hours, CT oocytes (19%) were in MI (metaphase I), while in MF50 they were in GV (germ vesicle) or GVB (GV breakeage), repeating at 12 hours. At 18 hours, 46.3% were matured in CT, and 20% in MF50. At 24 hours, 43.9% of maturation was observed in the MF50 group, and 63.8% in the CT. At 30 and 36 hours, the maturation pattern was stable, but with the onset of oocyte degeneration. There was a delay in cytoplasmic maturation with 36 hours (P<0.05) in MF50 (53.9% of mature gametes), compared to CT (69.8%). With immature cytoplasm, they were 10.4% and 31.7% for CT and MF50 (P<0.05), respectively. It was concluded that fullerol possibly interfered in the expansion of cumulus oophorus cells, as well as delayed the meiotic progression and cytoplasmic maturation.

https://doi.org/10.1590/1678-4162-12808

Research for anti - Toxoplasma gondii antibodies in free-living ducks (Cairina moschata) from Rio de Janeiro, RJ, Brazil
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Santos, A.L.C.

; Arruda, I.F.

; Barbosa, A.S.

; Balthazar, D.A.

; Augusto, A.M.

; Magalhães, B.S.N.

; Silva, V.L.

; Amendoeira, M.R.R.

Arquivo Brasileiro de Medicina Veterinária e Zootecnia

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jun 2022, Volume 74 N. 3 Pages 542 - 548

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

RESUMO Toxoplasmose é uma zoonose determinada pelo protozoário Toxoplasma gondii de ampla distribuição geográfica, que acomete animais homeotérmicos, sendo os felídeos os seus hospedeiros definitivos, e outros mamíferos e aves os seus hospedeiros intermediários. Em relação à espécie de ave latino-americana Cairina moschata, há poucos relatos no Brasil da exposição desses animais a esse protozoário. Mediante o exposto, este estudo teve como objetivo relatar pela primeira vez a exposição de C. moschata à infecção por esse parasito no Rio de Janeiro, Brasil, determinando a frequência sorológica de anticorpos anti-T. gondii em aves dessa espécie. Foram capturados, nos arredores do Zoológico do Rio de Janeiro, 67 espécimes de C. moschata, sendo esses animais, no momento da captura, triados pelo gênero e pelo tipo de pena. Amostras de sangue desses animais foram obtidas por venopunção para obtenção do soro. As amostras de soro foram submetidas à RIFI para pesquisa de anticorpos IgG anti-T. gondii. De forma geral, a frequência de positividade evidenciada foi de 58,21% (n=39), sendo observada associação estatística significativa (P<0,05) entre animais com plumagem de adultos e soropositividade. A exposição dos patos a T. gondii nos arredores do zoológico pode indicar a contaminação dessa área com oocistos do protozoário.

ABSTRACT Toxoplasmosis is a zoonosis determined by the protozoan Toxoplasma gondii with wide geographic distribution, which affects homeothermic animals, with felids being their definitive hosts and other mammals and birds being their intermediate hosts. Regarding the Latin American bird species Cairina moschata, there are few reports in Brazil of the exposure of these animals to this protozoan. Based on the above, this study aimed to report for the first time the exposure of C. moschata to infection by this parasite in Rio de Janeiro, Brazil, determining the serological frequency of anti-T. gondii antibodies in birds of this species. Sixty-seven specimens of C. moschata were captured in the vicinity of the Rio de Janeiro Zoo, and these animals at the time of capture were sorted by gender and type of feather. Blood samples from these animals were obtained by venipuncture to obtain the serum. The serum samples were subjected to IFAT for anti-T. gondii IgG. In general, the frequency of positive results was 58.21% (n=39), with a statistically significant association (p<0.05) between the animals with adult plumage and seropositivity. The exposure of ducks to T. gondii in the vicinity of the Zoo may indicate contamination of this area with protozoan oocysts.

https://doi.org/10.1590/1678-4162-12540

10.

Two years of the COVID-19 pandemic: an anesthesiology perspective
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Schmidt, André P.

; Módolo, Norma S.P.

; de Amorim, Célio G.

; Simões, Cláudia M.

; Kraychete, Durval C.

; Joaquim, Eduardo H.G.

; Lineburger, Eric B.

; Papa, Fábio V.

; Fernandes, Fátima C.

; Mendes, Florentino F.

; Guimarães, Gabriel M.N.

; Barros, Guilherme A.M.

; Silva-Jr, João M.

; Lima, Laís H. Navarro e

; Azi, Liana M.T.A.

; Carvalho, Lorena I.M.

; Stefani, Luciana C.

; Garcia, Luis V.

; Carmona, Maria José C.

; Salgado Filho, Marcello F.

; Nascimento Junior, Paulo do

; Alves, Rodrigo L.

; Carvalho, Vanessa H.

; Quintão, Vinicius C.

; Carmona, Maria José C.

Brazilian Journal of Anesthesiology

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apr 2022, Volume 72 N. 2 Pages 165 - 168

Abstract: En | Text: En | PDF: En

https://doi.org/10.1016/j.bjane.2022.02.004

11.

Large bowel obstruction by enteroliths and/or foreign bodies in domestic equids: retrospective study of cases seen from January 2003 to March 2020
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Nardi, K.B.

; Barros, A.M.C.

; Zoppa, A.L.V.

; Silva, L.C.L.C.

; Ambrósio, A.M.

; Hagen, S.C.F.

; Belli, C.B.

; Baccarin, R.Y.A.

; Fernandes, W.R.

; Spagnolo, J.D.

; Corrêa, R.R.

Arquivo Brasileiro de Medicina Veterinária e Zootecnia

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feb 2022, Volume 74 N. 1 Pages 83 - 92

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

RESUMO Este estudo retrospectivo foi baseado em dados extraídos de prontuários de 48 cavalos com obstrução intestinal causada por enterólitos e / ou corpos estranhos observados ao longo de 17 anos. A análise dos dados teve como objetivo descrever as principais características desse tipo de cólica. Obstruções provocadas por enterólitos, corpos estranhos ou ambos foram responsáveis por 40 (83,34%), seis (12,50%) e dois (4,16%) casos nesta amostra, respectivamente. Os cavalos afetados tinham entre um e 32 anos (idade média de 9,5 anos), e 14 cavalos foram alimentados com alfafa. Acredita-se que a alfafa contribua para a formação de enterólitos. Corpos estranhos e enterólitos foram encontrados no cólon transverso (12 casos, 25%), maior ou menor (10 casos, 20,83%, respectivamente). A obstrução simultânea de diferentes segmentos intestinais também foi registrada. Estes envolveram o cólon menor e o cólon maior em 10 casos (20,83%), o cólon transverso e o cólon maior em quatro casos (8,33%), o cólon menor e o transverso em um caso (2,08%) e a transição do cólon maior para o cólon transverso em um caso (2,08%). A sobrevida em curto prazo foi de 77,08%, em geral, e de 87,50% quando contabilizados apenas os pacientes submetidos ao tratamento pós-operatório. Os dados de sobrevivência são consistentes com as taxas de sobrevivência de 91% relatadas na literatura.

ABSTRACT This retrospective study was based on data extracted from medical records of 48 horses with intestinal obstruction caused by enteroliths and/or foreign bodies seen over the course of 17 years. Data analysis was aimed at describing the major features of this type of colic. Obstructions caused by enteroliths, foreign bodies or both accounted for 40 (83.34%), 6 (12.50%) and 2 (4.16%) cases in this sample respectively. Affected horses were aged 1 to 32 years (mean age 9.5 years) and 14 horses were fed alfalfa. Alfalfa is thought to contribute to enterolith formation. Foreign bodies and enteroliths were found in the transverse (12 cases, 25%), the large or the small colon (10 cases, 20.83% respectively). Concurrent obstruction of different intestinal segments was also recorded. These involved the small and the large colon in 10 cases (20.83%), the transverse and the large colon in 4 cases (8.33%), the small and the transverse colon in 1 case (2.08%) and the transition from the large to the transverse colon in one case (2.08%). Short term survival was 77.08% overall and 87.50% when only patients submitted to postoperative treatment were accounted for. Survival data are consistent with survival rates of 91% reported in literature.

https://doi.org/10.1590/1678-4162-12442

12.

Weather conditions favorable for agricultural spraying in Rio Grande do Sul State
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Radons, Sidinei Z.

; Heldwein, Arno B.

; Silva, Jocélia R. da

; Silva, Atawana V. da

; Schepke, Eduardo

; Lucas, Dionéia D. P.

Revista Brasileira de Engenharia Agrícola e Ambiental

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jan 2022, Volume 26 N. 1 Pages 36 - 43

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

RESUMO O conhecimento dos momentos em que as condições meteorológicas são favoráveis à pulverização agrícola é importante no planejamento agrícola, principalmente para o dimensionamento da frota. Este estudo teve como objetivo determinar, em escala temporal, as condições climáticas favoráveis à pulverização agrícola no Estado do Rio Grande do Sul, assim como as épocas e meses do ano com melhores e piores condições, o elemento meteorológico mais limitante e suas relações com as coordenadas geográficas e a altitude do local. Foram utilizados dados horários de estações meteorológicas automáticas de 12 locais, perfazendo um total de 56.500 dias e 1.356.009 observações horárias. Foram considerados favoráveis os valores de velocidade do vento acima de 3 km h-1 e abaixo de 10 km h-1, temperatura do ar ≤ 30 °C e umidade relativa do ar maior que 55%. Os dados foram expostos após à análise descritiva considerando a frequência e a média registrada. A altitude apresentou correlação negativa moderada com a velocidade do vento. A temperatura do ar é o elemento meteorológico com maior favorabilidade para pulverizações agrícolas no Rio Grande do Sul. A velocidade do vento é o elemento meteorológico mais limitante. Não houve diferença de favorabilidade entre os meses do ano. Os horários mais favoráveis ocorreram das 18:00 às 11:00 h e os mais desfavoráveis das 12:00 às 17:00 h. Considerando a condição em que a temperatura do ar, velocidade do vento e umidade relativa do ar foram simultaneamente adequadas para a pulverização agrícola no Rio Grande do Sul, 43,2% dos momentos foram favoráveis.

ABSTRACT Knowledge of the periods when the meteorological conditions are favorable for agricultural spraying is important in agricultural planning, particularly in fleet dimensioning. This study aimed to determine, on a temporal scale, favorable weather conditions for agricultural spraying in Rio Grande do Sul State, Brazil. In addition, the times and months of the year that have the most and least suitable conditions for agricultural spraying were investigated, as well as the meteorological conditions that are frequently limiting and their relationships with the geographic coordinates and altitude of the location. Hourly data from automatic weather stations in 12 locations were collected, totaling 56,500 days and 1,356,009 hourly observations. Wind speeds greater than 3 km h-1 and less than 10 km h-1, air temperatures up to 30 °C, and relative air humidity above 55% were considered favorable. The data were released after descriptive analysis considering the registered frequency and mean. Altitude showed a moderate negative correlation with wind speed favorability. Air temperature was the meteorological element with the greatest favorability for agricultural spraying in the Rio Grande do Sul State, whereas wind speed was the most limiting meteorological element. There were no differences in favorability between the months of the year. The most favorable times were from 6:00 p.m. to 11:00 a.m. and the most unfavorable from 12:00 p.m. to 5:00 p.m. Considering the condition in which air temperature, wind speed, and relative air humidity were adequate for agricultural spraying simultaneously in the Rio Grande do Sul State, 43.2% of the periods were favorable.

https://doi.org/10.1590/1807-1929/agriambi.v26n1p36-43 57 downloads

13.

Application of a Mix of Vegetables Residues as Inhibitor for Carbon Steel
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Barreto, L.S.

; Santos, A.M.

; de Almeida, T.F.

; Silva, D. R.

; Cotting, F.

; Capelossi, V.R.

Materials Research

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2022, Volume 25 elocation e20200440

Abstract: En | Text: En | PDF: En

This work investigates the synergistic use of Theobroma cacao (Cocoa), and Elaeis guineensis (Palm oil) as corrosion inhibitors for carbon steel in 0.5 mol.L-1 hydrochloric acid solution, in the absence and presence of different mixture concentrations of the studied compounds. The efficiency of corrosion inhibitors was studied by gravimetric tests and the corrosion resistance by electrochemical tests, such as electrochemical impedance spectroscopy (EIS) and polarization curves. The chemical composition of the cocoa bark powder and palm kernel cake powder was evaluated by Fourier transform infrared spectroscopy (FTIR). The results of the gravimetric tests showed an inhibition efficiency of 79% for the cocoa bark powder and 76% for palm kernel cake powder, however, the mixture of the compounds presented an inhibition superior to 94%, showing the great synergism between the studied species. These results corroborate the values obtained from EIS.

https://doi.org/10.1590/1980-5373-mr-2020-0440 41 downloads

14.

Quality of ram semen cryopreserved in egg yolk extender supplemented with myricetin
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Arruda, L.C.P.

; Silva, R.A.J.A.

; Mergulhão, F.C.C.

; Monteiro, M.M.

; Costa, J.A.S.

; Batista, A.M.

; Monteiro Júnior, P.L.J.

; Seal, D.C.M.

; Guerra, M.M.P.

South African Journal of Animal Science

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2022, Volume 52 N. 1 Pages 77 - 89

Abstract: En | Text: En | PDF: En

The aim of this study was to evaluate the ability of the antioxidant myricetin to protect ovine spermatozoa during freezing-thawing. Five semen pools, obtained from four rams, were diluted and frozen in Tris-egg yolk extender (5% glycerol) supplemented with myricetin at 0, 20, 30, 40, 100, 200, 300, and 400 nM. After thawing at 37 °C for 30 seconds and incubation (37 °C) for two hours, these variables were measured: kinematics, plasma and acrosome membrane integrity, mitochondrial membrane potential, intracellular reactive oxygen species (ROS) levels, lipid peroxidation and membrane stability. There was no interaction between treatment and time, and no direct effect of treatments for the kinematics parameters (P >0.09; P >0.2113, respectively) and flow cytometry (P >0.41; P > 0.52, respectively). The means of progressive motility, curvilinear velocity, straight-line velocity, average path velocity, linearity, amplitude of lateral head displacement, percentage of intact plasma membrane and acrosome membrane, oxidative stress and membrane stability were reduced during incubation (P <0.04), whereas the cross-beat frequency increased (P =0.0001) throughout incubation. Thus, the addition of myricetin to the semen extender does not produce an antioxidant effect on ram semen in vitro.

https://doi.org/10.4314/sajas.v52i1.10 16 downloads

15.

Is dysbiosis a preponderant factor for the occurrence of oral lesions in SARS-CoV- 2 positive patients? A critical analysis
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SANTANA, LUCAS A.M.

; CONCEIÇÃO, ROBERTY N.M.

; REZENDE-SILVA, ERIKA

; BARBOSA, BRENO F.

; BORGES, LYSANDRO P.

; TRENTO, CLEVERSON LUCIANO

Anais da Academia Brasileira de Ciências

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2022, Volume 94 elocation e20211635

Abstract: En | Text: En | PDF: En

https://doi.org/10.1590/0001-3765202220211635

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