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au:Alves Júnior, Severino

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Photoluminescent Sensor for Fe3+ Based on Calix[4]arene-Derivative-Modified UiO-66-NH2 Fe3 Fe Calix4areneDerivativeModified CalixareneDerivativeModified Calix 4 arene Derivative Modified UiO66NH2 UiONH UiO 66 NH2 NH UiO-66-NH areneDerivativeModified UiO66NH 6
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Fonseca, José D. S.

; da Costa, Ohanna M. M. M.

; Alves Júnior, Severino

; Barros, Bráulio S.

; Kulesza, Joanna

Journal of the Brazilian Chemical Society

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2025, Volume 36 Nº 3 elocation e-20240146

Resumo: En | Texto: En | PDF: En

Iron is an important ion that regulates many metabolic functions in the human body, and its deficiency or overload can cause serious health problems. In view of this, the development of tools that can quantify iron in aqueous media is quite valuable. A new material based on a metal-organic framework (MOF) and a calixarene derivative (CALIX), here named CALIX@UiO-66-NH2, was successfully prepared and used as a luminescent sensor for iron ions in a water matrix containing various metal ions. The post-synthetic modification was demonstrated to be efficient on the MOF (UiO-66-NH2) modification, leading to a hybrid platform. The effect of the combination of both components (MOF and CALIX) led to a platform more sensitive to iron detection than the independent compounds. The CALIX@UiO-66-NH2 sensor shows a linear response toward Fe3+ ions with satisfactory linearity (R2 = 0.994) within the concentration range of 6.74 × 10−6−1.72 × 10−5 mol L−1. The limit of detection was determined to be as low as 1.6 mg L−1. The data demonstrate that CALIX@UiO-66-NH2 is an excellent probe for detecting Fe3+, as confirmed by almost complete fluorescence suppression. body problems this valuable metalorganic organic CALIX, CALIX , (CALIX) CALIX@UiO66NH2, CALIXUiO66NH2 CALIXUiONH CALIX@UiO 66 NH2, UiO NH2 NH postsynthetic post synthetic UiO66NH2 UiONH (UiO-66-NH2 compounds CALIX@UiO66NH2 CALIX@UiO-66-NH Fe3 Fe R2 R (R 0.994 0994 0 994 674 6 74 6.7 106172 10 1 72 10−6−1.7 105 5 10− L1 L L−1 16 1. suppression (CALIX CALIXUiO CALIXUiO66NH UiO66NH (UiO-66-NH CALIX@UiO66NH 0.99 099 99 67 7 6. 10617 10−6−1. L− 0.9 09 9 1061 10−6−1 0. 106 10−6− 10−6

https://doi.org/10.21577/0103-5053.20240146

Novel Terpene-Reinforced Photopolymerizable Resins Derived from Methacrylate Salts of Imidazole TerpeneReinforced Terpene Reinforced
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Lins, Ilária M. S.

; Vieira, Anderson G.

; Ribeiro, Rubson P. S.

; Santos, Dayane K. D. N.

; Maciel, Larissa G.

; Santa-Cruz, Petrus A.

; Alves Júnior, Severino

; Anjos, Janaína V. dos

Journal of the Brazilian Chemical Society

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2025, Volume 36 Nº 5 elocation e-20240201

Resumo: En | Texto: En | PDF: En

This research aims to develop new 3D (three-dimensional) printable resins made from methacrylate salts of imidazole, 2-methyl-imidazole, and 1-methyl-imidazole, with glycerol trimethacrylate serving as a crosslinking agent. With their backbone structure, these resins are easy and rapid to prepare, offering an alternative to conventional ones. Reinforced with terpene-based additives such as α-pinene, (R)-limonene, trans-ethyl cinnamate, and safrole, they present a diverse range of fifteen resin formulations. Each resin underwent printability tests, including printing tests, which revealed accuracy, precision, and dimensional stability compared to a commercial resin and its respective digital 3D models. Mechanical tests further demonstrated that adding alpha-pinene and (R)-limonene enhanced hardness, while safrole had the opposite effect. Resins containing α-pinene and (R)-limonene as additives showcased an elasticity modulus comparable to the commercial resin. According to mechanical tests, a cytocompatibility assay was conducted for the best resin, showing that this resin holds potential for developing drug delivery systems and other biomedical devices. D threedimensional three (three-dimensional imidazole 2methylimidazole, 2methylimidazole methylimidazole 2 methyl 2-methyl-imidazole 1methylimidazole, 1methylimidazole 1 1-methyl-imidazole agent structure prepare ones terpenebased terpene based αpinene, αpinene α pinene, pinene Rlimonene, Rlimonene R limonene, limonene transethyl trans ethyl cinnamate formulations accuracy precision models alphapinene alpha hardness effect devices

https://doi.org/10.21577/0103-5053.20240201

Chemical and mineralogical constitution of redoximorphic features and mechanism of formation of Plinthosols from the Araguaia River plain, Brazil plain
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Santos, Djavan Pinheiro

; Santos, Glenio Guimarães

; Oliveira, Virlei Álvaro de

; Silva, Gustavo Cassiano da

; Flores, Rilner Alves

; Azevedo, Antônio Carlos

; Souza Júnior, Valdomiro Severino de

; Pereira, Marcos Gervasio

Revista Brasileira de Ciência do Solo

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2024, Volume 48 elocation e0230115

Resumo: En | Texto: En | PDF: En

ABSTRACT Currently in Brazil, large grain cultivation projects on Plinthosols are a reality, however, there is little or no knowledge of the real mechanism of formation of the plinthite feature, in addition to what is reported in the literature as being a product of oxidation-reduction processes of iron element. This study evaluates iron redoximorphic features and investigates their chemical and mineralogical composition in two profiles of Plinthosols from the Araguaia River plain (P1 and P2). The study strengthens the understanding of the pedogenetic processes involved in the formation of mottles and plinthite. In this sense, it assesses whether the formation mechanisms corroborate the literature. Soil features were sampled in the upper right and left position at the initial plinthic horizon, upper right and left position at the main plinthic horizon, and lower right position at the base horizon of the plinthite zone in the profile. Separated samples comprising the soil matrix, mottles, and plinthite under natural moisture conditions were ground into powder form for chemical determinations by X-ray fluorescence (XRF), sulfuric acid attack (H2SO4), sodium dithionite-citrate-bicarbonate (DCB), and ammonium acid oxalate; and mineralogical determinations by X-ray diffraction. Iron contents in all determined forms were always higher in the plinthite feature, intermediate in the mottle feature, and lower in the soil matrix feature. Most of the Fe in all redoximorphic features is included in the structure of primary minerals and their derivatives (vermiculite, illite, and VHEs). Only part of the iron present (about 35.40 % in P1 and 41.98 % in P2) is detected in the form of oxides such as goethite and hematite, which could be formed in redox processes. The mottle and plinthite features under study are not the product of the classic process of segregation, mobilization, and accumulation of iron as a consequence of redox processes. These features were formed or emerged as a result of a relatively slow and constant weathering process of their source material, which is gradually decomposed in an aqueous medium, releasing most of its components. These components include iron and more mobile elements such as bases and silicon, which leave the system through drainage water, and of which a small part may eventually recombine to form new less complex minerals such as kaolinite and oxides. Brazil reality however feature oxidationreduction oxidation reduction element P (P P2. P2 . sense profile Xray X ray XRF, XRF , (XRF) H2SO4, H2SO4 HSO H SO (H2SO4) dithionitecitratebicarbonate dithionite citrate bicarbonate DCB, DCB (DCB) oxalate diffraction vermiculite, vermiculite (vermiculite illite VHEs. VHEs VHEs) about 3540 35 40 35.4 4198 41 98 41.9 hematite segregation mobilization material medium silicon water (XRF H2SO (H2SO4 (DCB 354 3 4 35. 419 9 41. (H2SO

https://doi.org/10.36783/18069657rbcs20230115

Toposequence: What are we talking about? Toposequence about
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Alves, Grace Bungenstab

; Oliveira, Fábio Soares de

; Silva, Artur Henrique Nascimento da

; Souza Junior, Valdomiro Severino de

Revista Brasileira de Ciência do Solo

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2024, Volume 48 elocation e0230137

Resumo: En | Texto: En | PDF: En

ABSTRACT The term toposequence, proposed to designate a lateral succession of soils on a slope due to the influence of topography, began to be used differently over time, distancing itself from its original concept. Here, we discuss how this concept has been used since its inception. We carried out bibliometric analyses of publications in the database available on the Web of Science since 1900. Three main approaches and related concepts, explicit or not, one at a regional scale and two others at a local scale were identified. From this analysis, we suggest: a) when the approach is regional, the term geomorphic surface or position in the landscape should be used to address the spatial distribution and genetic implications of soils at this scale; b) when dealing with series/sequences of soils on slopes for mapping purposes or discontinuous profiles that emphasize taxonomic classification, the term catena should be used; c) when the determining factor of the soil sequence is climatic, biotic, lithological, chronological, the corresponding term climo-, bio-, litho- or chronosequence should be used; d) when dealing with a lateral succession of horizons in the continuum on slopes, resulting from the influence of topography on soil formation, which may reflect the soil contribution to the model evolution, only in this case should the term toposequence be used, returning to its original concept. time Here inception 1900 concepts not identified analysis suggest b seriessequences series sequences classification c climatic biotic lithological chronological climo, climo , climo- bio, bio bio- litho d formation evolution 190 19 1

https://doi.org/10.36783/18069657rbcs20230137

Design and Evaluation of Systemic Administration of Nano Silica MCM48:Eu3+ in Mouse Brain MCM48Eu3+ MCM48Eu3 MCMEu MCM48 Eu3+ Eu3 MCM Eu MCM48:Eu3 MCM48Eu MCM4 MCM48:Eu
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Azevedo, Leandro A.

; Andrade-da-Costa, Belmira L. S.

; Augusto, Ricielle L.

; Luz, Leonis L.

; Souza, Ivone A. de

; Pinto, Licarion

; Alves, Iane B. V.

; Alves Júnior, Severino

Journal of the Brazilian Chemical Society

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Out 2023, Volume 34 Nº 10 Páginas 1445 - 1456

Resumo: En | Texto: En | PDF: En

In the present study, we tested the proof of concept that mobil mesoporous silica nanoparticle composition of matter (MCM) No. 48 doped with trivalent europium (nanoMCM48:Eu3+) administered systemically intravenously can act as a suitable vehicle to deliver neural cells to the brain of healthy adult Swiss mice without causing tissue damage. Moreover, we also tested the ability of this nanoparticle to release molecules in vitro, using as drug models caffeine or nicotine in phosphate buffer solution with pH 7.4 adequate to intra and extra-celular medium of the brain. The caffeine and nicotine adsorbed nanoparticles (CAF@MCM48:Eu3+ and NIC@MCM48:Eu3+) were observed in the parenchyma of the cerebral cortex and diffusely dispersed in the cellular cytoplasm. Statistical analysis using multivariate partner recognition methods indicated that there was no sign of cell damage, as it was characterized by chromatin condensation, nuclear condensation, or fragmentation. The characterization of nanoMCM48:Eu3+ as particle size, luminescent properties and release of active components were analyzed. The CAF@MCM48:Eu3+ and NIC@MCM48:Eu3+ nanoparticles were observed in the cerebral cortex parenchyma and diffusely dispersed in the cell cytoplasm, and the release of active components was analyzed. Therefore, the studies showed that mesoporous silica nanoparticles administered systemically via intravenous tissue can act as a suitable vehicle for neural cells in the brain of healthy mice without causing damage. study MCM (MCM No 4 nanoMCM48Eu3+ nanoMCM48Eu3 nanoMCMEu nanoMCM48 Eu3+ Eu3 nanoMCM Eu (nanoMCM48:Eu3+ damage Moreover vitro 74 7 7. extracelular extra celular CAF@MCM48Eu3+ CAFMCM48Eu3 CAFMCMEu CAF@MCM48 CAF MCM48 (CAF@MCM48:Eu3 NIC@MCM48Eu3+ NICMCM48Eu3 NICMCMEu NIC@MCM48 NIC cytoplasm condensation fragmentation nanoMCM48:Eu3 size analyzed CAF@MCM48:Eu3 NIC@MCM48:Eu3 Therefore nanoMCM48Eu nanoMCM4 (nanoMCM48:Eu3 MCM48Eu3 CAF@MCM48Eu3 CAFMCM CAFMCM48Eu CAFMCM48 CAF@MCM4 MCM4 (CAF@MCM48:Eu NIC@MCM48Eu3 NICMCM NICMCM48Eu NICMCM48 NIC@MCM4 nanoMCM48:Eu CAF@MCM48:Eu NIC@MCM48:Eu (nanoMCM48:Eu MCMEu MCM48Eu CAF@MCM48Eu CAFMCM4 CAF@MCM NIC@MCM48Eu NICMCM4 NIC@MCM

https://doi.org/10.21577/0103-5053.20230056

COVID-19 outcomes in people living with HIV: Peering through the waves COVID19 COVID 19 COVID-1 HIV COVID1 1 COVID-
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Sales, Thaís Lorenna Souza

; Souza-Silva, Maíra Viana Rego

; Delfino-Pereira, Polianna

; Neves, João Victor Baroni

; Sacioto, Manuela Furtado

; Assis, Vivian Costa Morais de

; Duani, Helena

; Oliveira, Neimy Ramos de

; Sampaio, Natália da Cunha Severino

; Ramos, Lucas Emanuel Ferreira

; Schwarzbold, Alexandre Vargas

; Jorge, Alzira de Oliveira

; Scotton, Ana Luiza Bahia Alves

; Castro, Bruno Mateus de

; Silva, Carla Thais Cândida Alves da

; Ramos, Carolina Marques

; Anschau, Fernando

; Botoni, Fernando Antonio

; Grizende, Genna Maira Santos

; Nascimento, Guilherme Fagundes

; Ruschel, Karen Brasil

; Menezes, Luanna Silva Monteiro

; Castro, Luís César de

; Nasi, Luiz Antônio

; Carneiro, Marcelo

; Godoy, Mariana Frizzo de

; Nogueira, Matheus Carvalho Alves

; Guimarães Júnior, Milton Henriques

; Ziegelmann, Patricia Klarmann

; Almeida, Rafaela Charão de

; Francisco, Saionara Cristina

; Silveira Neto, Sidney Teodoro

; Araújo, Silvia Ferreira

; Avelino-Silva, Thiago Junqueira

; Aliberti, Márlon Juliano Romero

; Pires, Magda Carvalho

; Silva, Eduardo Sérgio da

; Marcolino, Milena Soriano

Clinics

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2023, Volume 78 elocation 100223

Resumo: En | Texto: En | PDF: En

Abstract Objective To evaluate clinical characteristics and outcomes of COVID-19 patients infected with HIV, and to compare with a paired sample without HIV infection. Methods This is a substudy of a Brazilian multicentric cohort that comprised two periods (2020 and 2021). Data was obtained through the retrospective review of medical records. Primary outcomes were admission to the intensive care unit, invasive mechanical ventilation, and death. Patients with HIV and controls were matched for age, sex, number of comorbidities, and hospital of origin using the technique of propensity score matching (up to 4:1). They were compared using the Chi-Square or Fisher's Exact tests for categorical variables and the Wilcoxon for numerical variables. Results Throughout the study, 17,101 COVID-19 patients were hospitalized, and 130 (0.76%) of those were infected with HIV. The median age was 54 (IQR: 43.0;64.0) years in 2020 and 53 (IQR: 46.0;63.5) years in 2021, with a predominance of females in both periods. People Living with HIV (PLHIV) and their controls showed similar prevalence for admission to the ICU and invasive mechanical ventilation requirement in the two periods, with no significant differences. In 2020, in-hospital mortality was higher in the PLHIV compared to the controls (27.9% vs. 17.7%; p = 0.049), but there was no difference in mortality between groups in 2021 (25.0% vs. 25.1%; p > 0.999). Conclusions Our results reiterate that PLHIV were at higher risk of COVID-19 mortality in the early stages of the pandemic, however, this finding did not sustain in 2021, when the mortality rate is similar to the control group. COVID19 COVID 19 COVID-1 infection (202 2021. . 2021) records unit death sex comorbidities up 41. 41 4 1 4:1) ChiSquare Chi Square Fishers Fisher s study 17101 17 101 17,10 hospitalized 13 0.76% 076 0 76 (0.76% 5 IQR (IQR 43.064.0 430640 43.0 64.0 43 64 43.0;64.0 202 46.063.5 460635 46.0 63.5 46 63 46.0;63.5 (PLHIV differences inhospital 27.9% 279 27 9 (27.9 vs 17.7% 177 7 0.049, 0049 0.049 , 049 0.049) 25.0% 250 25 (25.0 25.1% 251 0.999. 0999 0.999 999 0.999) pandemic however group COVID1 COVID- (20 4:1 1710 10 17,1 0.76 07 (0.76 064 43.064. 43064 430 43. 640 64. 6 43.0;64. 20 063 46.063. 46063 460 46. 635 63. 46.0;63. 27.9 2 (27. 17.7 004 0.04 04 25.0 (25. 25.1 099 0.99 99 (2 4: 171 17, 0.7 (0.7 06 43.064 4306 43.0;64 46.063 4606 46.0;63 27. (27 17. 00 0.0 25. (25 09 0.9 ( 0. (0. 43.06 43.0;6 46.06 46.0;6 (0 43.0; 46.0;

https://doi.org/10.1016/j.clinsp.2023.100223

Bovine genital leptospirosis: Findings in bulls maintained in Caatinga biome conditions leptospirosis
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Barnabé, Nathanael N.C.

; Soares, Rafael R.

; Nogueira, Denise B.

; Araújo Júnior, João P.

; Malossi, Camila D.

; Costa, Diego F.

; Silva, Maria L.C.R.

; Higino, Severino S.S.

; Azevedo, Sérgio S.

; Alves, Clebert J.

Pesquisa Veterinária Brasileira

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2023, Volume 43 elocation e07376

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO: A leptospirose é uma doença que causa impacto econômico e social, pois afeta animais silvestres, domésticos e humanos. É possível que existam peculiaridades na epidemiologia desta doença no bioma Caatinga, Brasil, onde o ambiente é adverso e o agente etiológico, Leptospira spp., requer vias alternativas de transmissão. Considerando que na leptospirose bovina o portador genital é constantemente negligenciado e a falta de relatos sobre o papel dos touros na epidemiologia da síndrome da leptospirose genital bovina (BGL), principalmente em condições semiáridas como no bioma Caatinga, este estudo teve como objetivo investigar touros mantidos em condições do bioma Caatinga como portadores genitais de leptospiras. Amostras do trato urinário (urina, bexiga e rim) e do trato reprodutivo (ducto deferente, cauda do epidídimo e glândula vesicular) foram coletadas de 42 touros abatidos. Teste de soroaglutinação microscópica (SAM), reação em cadeia da polimerase (PCR) e isolamento microbiológico foram incluídos como métodos de diagnóstico. Anticorpos anti-Leptospira spp. foram encontrados em 17 (40,48%) animais, enquanto 26 animais (61,90%) apresentaram pelo menos um órgão ou urina com DNA leptospírico, e 10 animais (23,81%) foram positivos na cultura bacteriológica. As amostras sequenciadas a partir do gene LipL32 apresentaram 99% de similaridade com Leptospira borgpetersenii. Recomenda-se a análise molecular de amostras de ducto deferente e cauda do epidídimo para o diagnóstico de leptospirose genital em touros e, na impossibilidade da coleta desses tecidos, o sêmen pode ser utilizado. Em conclusão, este estudo fornece informações importantes sobre touros do bioma Caatinga, Brasil, como portadores de leptospirose genital. Os resultados indicam que, mesmo em condições ambientais adversas, as leptospiras podem sobreviver e se propagar, principalmente devido à característica de os portadores genitais disseminarem sexualmente espécies adaptadas de Leptospira sem influência de variáveis externas. Assim, as estratégias de prevenção e controle da leptospirose bovina precisam incluir ações voltadas para o portador genital. RESUMO social silvestres humanos Brasil etiológico spp transmissão BGL, BGL , (BGL) urina, (urina rim vesicular 4 abatidos SAM, SAM (SAM) PCR (PCR antiLeptospira anti 1 40,48% 4048 40 48 (40,48% 2 61,90% 6190 61 90 (61,90% leptospírico 23,81% 2381 23 81 (23,81% bacteriológica LipL LipL3 99 borgpetersenii Recomendase Recomenda tecidos utilizado conclusão adversas propagar externas Assim (BGL (SAM 40,48 404 (40,48 61,90 619 6 9 (61,90 23,81 238 8 (23,81 40,4 (40,4 61,9 (61,9 23,8 (23,8 40, (40, 61, (61, 23, (23, (40 (61 (23 (4 (6 (2 (

ABSTRACT: Leptospirosis is a disease that causes economic and social impact, as it affects wild and domestic animals and humans. There may be peculiarities in the epidemiology of this disease in the Caatinga biome, Brazil, where the environment is adverse and the etiologic agent, Leptospira spp., requires alternative transmission routes. Considering that in bovine leptospirosis the genital carrier is constantly neglected and the lack of reports on the role of bulls in the epidemiology of the bovine genital leptospirosis (BGL) syndrome, mainly in semiarid conditions such as Caatinga biome, this study aimed to investigate bulls maintained in Caatinga biome conditions as genital carriers of leptospires. Urinary tract (urine, bladder, and kidney) and reproductive tract (vas deferens, cauda epididymis, and vesicular gland) samples were collected from 42 slaughtered bulls. Microscopic agglutination test (MAT), polymerase chain reaction (PCR), and microbiological isolation were included as diagnostic methods. Anti-Leptospira spp. antibodies were found in 17 (40.48%) animals, while 26 animals (61.90%) had at least one organ or urine with leptospiral DNA, and 10 animals (23.81%) were positive at bacteriological culture. Sequenced samples targeting the LipL32 gene showed 99% similarity with Leptospira borgpetersenii. Molecular analysis of samples from the vas deferens and cauda epididymis is recommended for the diagnosis of genital leptospirosis in bulls and, if it is impossible to collect these tissues, semen can be used. In conclusion, this study provides important information relating to bulls from the Caatinga biome, Brazil, as carriers of genital leptospirosis. The results indicate that, even under adverse environmental conditions, leptospires may survive and propagate, mainly due to the characteristic of genital carriers for the sexually spreading of adapted Leptospira species without influence by external variables. Thus, prevention and control strategies for bovine leptospirosis need to include actions aimed at the genital carrier. ABSTRACT impact humans Brazil agent spp routes BGL (BGL syndrome urine, (urine bladder kidney gland 4 MAT, MAT , (MAT) PCR, PCR (PCR) methods AntiLeptospira Anti 1 40.48% 4048 40 48 (40.48% 2 61.90% 6190 61 90 (61.90% DNA 23.81% 2381 23 81 (23.81% culture LipL LipL3 99 borgpetersenii tissues used conclusion propagate variables Thus (MAT (PCR 40.48 404 (40.48 61.90 619 6 9 (61.90 23.81 238 8 (23.81 40.4 (40.4 61.9 (61.9 23.8 (23.8 40. (40. 61. (61. 23. (23. (40 (61 (23 (4 (6 (2 (

https://doi.org/10.1590/1678-5150-pvb-7376

Occurrence of Cryptosporidium in Anglonubian goats in the municipality of Teresina, state of Piauí, Brazil Teresina Piauí
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Oliveira, Marcelo Richelly Alves de

; Luz, Carlos Syllas Monteiro

; Evangelista, Amauri Felipe

; Castro, Geandro Carvalho

; Bresciani, Kátia Denise Saraiva

; Santos, Karina Rodrigues dos

; Sousa Júnior, Severino Cavalcante de

Ciência Animal Brasileira

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2023, Volume 24 elocation e-75154E

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo O objetivo desta pesquisa foi investigar a ocorrência de Crypstoporidium e correlacionar com tipos de alojamento, consistência das fezes e parâmetros fisiológicos ligados ao estado reprodutivo de cabras da raça Anglonubiana criadas no estado do Piauí, Brasil. Foram utilizadas 180 amostras de fezes de 60 cabra, com peso médio de 35kg, escore de condição corporal de 3,5, com idade em média de três anos, e cabras vazias e lactantes, de um rebanho experimental da Universidade Federal do Piauí (UFPI). Utilizando-se a técnica de Ziehl-Neelsen modificada em esfregaço fecal e sistema de análise de imagens para a realização da morfometria, foi possível encontrar oocistos de protozoários do gênero Crypstoporidium nos animais estudados. Nas análises quantitativa e qualitativa, cada variável independente: peso, escore de condição corporal (ECC), estado fisiológico (vazia ou lactante), consistência das fezes (normal, pastosa ou diarreica) e tipos de piso (concreto e ripado), foi testada com a variável dependente (amostras positivas, ou seja, presença de oocistos de Cryptosporidium). Do total de amostras fecais analisadas, 24 delas foram consideradas positivas à presença do protozoário, o que significa que 13,3% dos animais estavam parasitados na ocasião da pesquisa. Foi observado que 100% das amostras de fezes positivas apresentaram consistência normal (firme) e que todos os animais parasitados eram criados em aprisco com piso de concreto. Houve uma variação estatística no ECC dos animais parasitados comparados aos não parasitados (p > 0,0253). Os resultados evidenciaram que a ocorrência de Cryptosporidium em caprinos experimentais localizados no município de Teresina, no estado do Piauí, foi considerada baixa, sendo necessária medidas de manejo sanitário para prevenir a infecção nos animais e no homem. Este é o primeiro relato da infecção por Cryptosporidium em cabras no estado do Piauí. alojamento Brasil 18 6 cabra 35kg kg 35 3 5 3,5 anos lactantes UFPI. UFPI . (UFPI) Utilizandose Utilizando se ZiehlNeelsen Ziehl Neelsen morfometria estudados qualitativa independente ECC, , (ECC) vazia lactante, lactante lactante) normal, (normal diarreica concreto ripado, ripado ripado) seja Cryptosporidium. Cryptosporidium) analisadas 2 protozoário 133 13 13,3 100 firme (firme p 0,0253. 00253 0,0253 0 0253 0,0253) Teresina baixa homem 1 3, (UFPI (ECC 13, 10 0025 0,025 025 002 0,02 02 00 0,0 0,

Abstract This research aimed to investigate the occurrence of Cryptosporidium and correlate it with types of housing, feces consistency, and physiological parameters related to the reproductive status of Anglo-Nubian goats reared in the State of Piauí, Brazil. A total of 180 fecal samples were collected from 60 non-pregnant and lactating goats with a mean weight of 35 kg, a body condition score of 3.5, and a mean age of three years from an experimental herd at the Federal University of Piauí (UFPI). Oocysts of protozoa of the genus Cryptosporidium could be found in the studied animals using the modified Ziehl-Neelsen technique in fecal smears and the image analysis system to perform morphometry. Each independent variable in the quantitative and qualitative analyses, that is, weight, body condition score (BCS), physiological status (non-pregnant or lactating), feces consistency (normal, pasty, or diarrheal), and floor types (concrete and slatted), was tested with the dependent variable (positive samples, i.e., the presence of Cryptosporidium oocysts). Twenty-four out of the total number of fecal samples were considered positive for the presence of the protozoan, which means that 13.3% of the animals were parasitized. Moreover, 100% of the positive feces samples had normal consistency (firm) and all parasitized animals were reared in pens with a concrete floor. A statistical variation was observed in the BCS of parasitized animals compared to non-parasitized ones (p > 0.0253). The results showed that the occurrence of Cryptosporidium in experimental goats located in the municipality of Teresina, State of Piauí, Brazil, was considered low, requiring sanitary management measures to prevent infection in animals and humans. This is the first report of Cryptosporidium infection in goats in the State of Piauí. housing AngloNubian Anglo Nubian Brazil 18 6 nonpregnant non pregnant 3 kg 5 3.5 UFPI. UFPI . (UFPI) ZiehlNeelsen Ziehl Neelsen morphometry analyses BCS, , (BCS) lactating, lactating) normal, (normal pasty diarrheal, diarrheal diarrheal) slatted, slatted slatted) ie i e i.e. oocysts. oocysts oocysts) Twentyfour Twenty four protozoan 133 13 13.3 Moreover 100 firm (firm nonparasitized p 0.0253. 00253 0.0253 0 0253 0.0253) Teresina low humans 1 3. (UFPI (BCS i.e 13. 10 0025 0.025 025 002 0.02 02 00 0.0 0.

https://doi.org/10.1590/1809-6891v24e-75154e

UMA ROTA ALTERNATIVA PARA OBTENÇÃO DE REDES DE COORDENAÇÃO VIA SÍNTESE SOLVOTERMAL UTILIZANDO Eu2O3 E ÁCIDO 2,6-NAFTALENODICARBOXÍLICO
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Oliveira, Roberta F.

; Pereira, Raphael H. de M.

; Viana, Rodrigo da Silva

; Alves Júnior, Severino

; Belian, Mônica F.

Química Nova

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Mai 2022, Volume 45 Nº 5 Páginas 537 - 542

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

An alternative route to synthesis of metal-organic frameworks containing Eu(III) ion was proposed via solvothermal process in aqueous medium. The compounds of the minimal formulae [Ln2(NDC)3(H2O)4] were synthesized starting from the mixture of the 2,6-naphthalenedicarboxylic acid with europium(III) oxide. So far, this type of metalorganic framework based on the lanthanide ion synthetic route has not been investigated before as the main metal sources are nitrate and chloride salts. The structural characterizations were performed by FTIR spectroscopy, thermal analysis TG-DSC, and X-ray diffraction. The results of IR and TG were consistent with the structural determination results and complemented by X-ray diffraction patterns. SEM images also corroborate the morphologies found in recent research on this material. The materials obtained shown high-intensity luminescence, for the Eu-NDC compound, which corroborates with an energy transfer efficient of the ligand to Eu(III) ion.

https://doi.org/10.21577/0100-4042.20170863

10.

Uso da homeopatia no gado de leite como modulador da função hepática: uma revisão
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Pinheiro, Jessyca Karen

; Toledo Henriques, Lara

; Gonzaga Neto, Severino

; Dias Signoretti, Ricardo

; Silva Oliveira, Juliana

; Pinheiro, Jovanna Karine

; Alves Júnior, Tonhá

CES Medicina Veterinaria y Zootecnia

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Jan 2021, Volume 16 Nº 1 Páginas 29 - 46

Resumo: Es En Pt | Texto: Es En Pt | PDF: Es | PDF: En | PDF: Pt

Resumen La homeopatía se puede utilizar en la producción lechera como una alternativa segura a los antibióticos, capaz de reducir la expansión de la resistencia microbiana, manteniendo la salud de los rebaños. Sin embargo, los compuestos homeopáticos también pueden usarse como protectores del hígado y pueden actuar en la modulación de la función hepática. Los medicamentos homeopáticos a base de hierbas se pueden utilizar como agentes hepatoprotectores, ya que tienen la capacidad de prevenir y reparar los trastornos hepáticos que comúnmente afectan a las vacas lactantes. Así, el conocimiento de las propiedades terapéuticas de las plantas permite la elaboración de preparados homeopáticos, capaces de preservar la salud de los animales de granja. En base a esto, el objetivo de esta revisión es discutir los compuestos vegetales utilizados en homeopatía como hepatoprotectores y sus efectos sobre el metabolismo hepático y la respuesta productiva de los rumiantes lactantes.

Abstract Homeopathy can be used in dairy farming as a safe alternative to antibiotics, capable of reducing the expansion of microbial resistance, while maintaining the health of herds. However, homeopathic compounds can also be used as liver protectors, and can act in the modulation of liver function. Herbal homeopathic medicines can be used as hepatoprotective agents, since they have the ability to prevent and repair liver disorders that commonly affect lactating cows. Thus, knowledge of the therapeutic properties of plants allows the preparation of homeopathic preparations, capable of preserving the health of farm animals. Based on this, the aim of this review was to discuss plant compounds used in homeopathy as hepatoprotectors and their effects on liver metabolism and on the productive response of lactating ruminant animals.

Resumo A homeopatia pode ser utilizada na pecuária leiteira como uma alternativa segura aos antibióticos, capaz de reduzir a expansão da resistência microbiana, ao passo que mantém a saúde dos rebanhos. No entanto, os compostos homeopáticos podem também ser usados como protetores do fígado, podendo atuar na modulação da função hepática. Os medicamentos homeopáticos a base de plantas podem ser utilizados como agentes hepatoprotetores, uma vez que possuem a capacidade de prevenir e reparar desordens hepáticas que comumente acometem vacas em lactação. Assim, o conhecimento das propriedades terapêuticas de plantas permite a elaboração de preparos homeopáticos, capazes de preservar a saúde dos animais de produção. Baseado nisso, objetivou-se com esta revisão discorrer sobre compostos vegetais utilizados na homeopatia como hepatoprotetores e seus efeitos no metabolismo hepático e na resposta produtiva de animais ruminantes em lactação.

https://doi.org/10.21615/cesmvz.16.1.2 67 downloads

11.

Effects of gamma radiation on nanocomposite films of polycaprolactone with modified MCM-48
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Paula, Marcos Vinícius

; Azevedo, Leandro Araújo de

; Silva, Ivo Diego de Lima

; Vinhas, Glória Maria

; Alves Junior, Severino

Polímeros

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2021, Volume 31 Nº 3 elocation e2021031

Resumo: En | Texto: En | PDF: En

Abstract The aim of this investigation was to assess the effects of gamma radiation on nanocomposite films (NC films) formed by PCL (polycaprolactone) with MCM-48 nanoparticles (PCL/MCM-48) and PCL with MCM-48 NPs modified with (3-aminopropyl)triethoxysilane (APTES) (PCL/MCM-48-NH2). The nanocomposite films were obtained using the solvent casting method. After preparing the films, they were irradiated at 25 kGy in the presence of air and analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM), transmission electronic microscopy (TEM), as well as for their mechanical properties. The exposure of NC films to gamma radiation at 25 kGy did not cause major changes in either thermal or mechanical properties such as tensile strength and modulus of elasticity. The results revealed that gamma radiation was a successful choice for the sterilization of these materials.

https://doi.org/10.1590/0104-1428.20210044

12.

Residue-Based CaO Heterogeneous Catalysts from Crab and Mollusk Shells for FAME Production Via Transesterification
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Cardoso, Claudia Cristina

; Cavalcanti, Alexsandro S.

; Silva, Ricardo O.

; Alves Junior, Severino

; Sousa, Fabiana P. de

; Pasa, Vânya Marcia D.

; Arias, Santiago

; Pacheco, Jose G. A.

Journal of the Brazilian Chemical Society

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Abr 2020, Volume 31 Nº 4 Páginas 756 - 767

Resumo: En | Texto: En | PDF: En

The production of fatty acid methyl esther (FAME) via transesterification was studied, assessing the influence of CaO heterogeneous catalysts obtained from four different fishery residues: sururu, crab, clam and mussel. Characterization and properties of the residues were obtained via thermogravimetric analysis, X-ray diffraction, X-ray fluorescence, Fourier transform infrared (FTIR) spectra, nitrogen adsorption/desorption, chemical composition and scanning electron microscopy (SEM). Catalytic activities and reaction kinetics of FAME synthesis from the transesterification of soybean oil were performed. FAME yield was determined by 1H nuclear magnetic resonance (NMR). A higher efficiency and reaction rate were observed for the catalysts obtained from the sururu residues with 93.7% FAME yield after 3.5 h of reaction at the first usage, reducing only to 91.0% after four consecutive cycles of reuse. The best activities were assigned to the presence of SrO, to smaller particle size, higher pore volumes and the higher Ca leaching, yielding Ca-diglyceroxide which is an important active phase for transesterification.

https://doi.org/10.21577/0103-5053.20190240 503 downloads

13.

Structural and photophysical properties of hydroxyapatite doped with lanthanide ions
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Barbosa, Amanda Alves

; Alves Junior, Severino

; Oliveira, Raquel Aline Pessoa

; Ferraz, Andréa de Vasconcelos

Matéria (Rio de Janeiro)

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2020, Volume 25 Nº 4 elocation e-12862

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO Matrizes de hidroxiapatita (HAp) dopadas com os íons lantanídeos Eu3+, Ce3+ e Gd3+, [Ca10-xLnx(PO4)6(OH)2], foram obtidas pelo método da precipitação com o objetivo de estudar suas propriedades fotofísicas. A partir de análises de Microscopia Eletrônica de Varredura observou-se que amostras dopadas com íons lantanídeos (Ln3+) apresentaram similaridade com a morfologia da HAp pura, por outro lado nos difratogramas de Raios X a partir do refinamento Rietveld verificou-se que a matriz aparece como fase majoritária (≈ 70%) enquanto (≈ 30%) de uma fase secundária de tricálcio fosfato (TCP) foi conferida em função das diferentes dopagens. Isotermas de adsorção obtidas pela técnica BET indicaram que todos os materiais sintetizados são classificados como mesoporosos. Os espectros de emissão dos materiais exibem bandas características dos íons Ln3+ incorporados à estrutura da matriz em 573 nm (5D0→F0), 600 nm (5D0→F1), 628 nm (5D0→F2), e 698 nm (5D0→F4) para HAp/Eu, 337-360 nm (5d→4f) para HAp/Ce e em 425 nm para HAp/Gd.

ABSTRACT Hydroxyapatite (HAp) matrices doped with lanthanide ions Eu3+, Ce3+ and Gd3+, [Ca10-xLnx(PO4)6(OH)2] were obtained through the precipitation method so their photophysical properties could be studied. From the Scanning Electron Microscopy analyzes it was observed that samples doped with lanthanide ions (Ln3+) showed similarity with the morphology of pure HAp, whereas Rietveld-refined X-ray diffractograms showed that the matrix appears as the major phase (≈70%) while (≈30%) of a second phase of tricalcium phosphate (TCP) was due to the different doping levels. Adsorption isotherms obtained by the BET technique indicated that all the synthesized materials are classified as mesoporous. The emission spectra of the materials exhibit bands typical of the Ln3+ ions incorporated into the matrix structure at 573 nm (5D0→F0), 600 nm (5D0→F1), 628 nm (5D0→F2), and 698 nm (5D0 → F4) for HAp/Eu, 337-360 nm (5d → 4f) for HAp/Ce and at 425 nm for HAp/Gd.

https://doi.org/10.1590/s1517-707620200004.1162 441 downloads

14.

Leptospira interrogans infection in tegu lizard (Tupinambis merianae), Brazil
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Fernandes, Juciê Jales

; Pinheiro, Tiago Junior

; Costa, Diego Figueiredo

; Araújo Júnior, João Pessoa

; Malossi, Camila Dantas

; Ullmann, Leila Sabrina

; Silva, Maria Luana Cristiny Rodrigues

; Azevedo, Sérgio Santos

; Alves, Clebert José

; Higino, Severino Silvano dos Santos

Ciência Rural

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2020, Volume 50 Nº 12 elocation e20200424

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO: Foram utilizados 12 lagartos Teiús (Tupinambis merianae) do Nordeste do Brasil. Encontramos nove animais positivos (75%) para Leptospira sp. na PCR e seis (50%) soropositivos. O sequenciamento de DNA de Leptospira sp. revelou 99% de semelhança com L. interrogans. Os resultados indicam que esta espécie pode desempenhar um papel importante na transmissão da leptospirose humana.

ABSTRACT: We used 12 tegu lizards (Tupinambis merianae) from northeastern Brazil, and we reported nine (75%) Leptospira sp. PCR-positive animals and six (50%) seropositive. Leptospira sp. DNA sequencing revealed 99% similarity with L. interrogans. Our findings indicated that this species may play a role in the transmission of human leptospirosis.

https://doi.org/10.1590/0103-8478cr20200424 463 downloads

15.

PEDOGENESIS ON COASTAL TABLELANDS AREA WITH LOW RANGE ALTIMETRY IN PARAÍBA STATE
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SILVA, GIVANILDO ALVES DA

; CAMÊLO, DANILO DE LIMA

; CORRÊA, MARCELO METRI

; SOUZA JÚNIOR, VALDOMIRO SEVERINO DE

; RIBEIRO FILHO, MATEUS ROSAS

; ARAÚJO FILHO, JOSÉ COELHO DE

Revista Caatinga

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Jun 2019, Volume 32 Nº 2 Páginas 458 - 471

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO Pequenas variações de relevo influenciam na drenagem e no escoamento superficial, contribuindo para a formação de horizontes superficiais arenosos e subsuperficiais endurecidos (fragipãs e, ou, duripãs) em solos dos Tabuleiros Costeiros. Este trabalho investigou a pedogênese em área de Tabuleiros Costeiros com baixa amplitude altimétrica no Estado da Paraíba; secundariamente, buscamos contribuir para o aprimoramento do Sistema Brasileiro de Classificação de Solos (SiBCS). Quatro perfis de solos foram descritos e coletados para a realização das análises físicas e químicas de rotina, extrações de Fe, Si e Al por digestão sulfúrica, por ditionito-citrato-bicarbonato de sódio, por oxalato ácido de amônio e por pirofosfato de sódio, e as análises mineralógicas das frações areia e argila por difratometria de raios X. A densidade ótica do extrato de oxalato (ODOE) também foi determinada; os resultados obtidos foram estatisticamente avaliados utilizando o programa R. As variações do microrrelevo condicionando fluxos diferenciados de água, juntamente com a textura arenosa dos horizontes superficiais (A e E) e a menor relação areia grossa/areia fina no horizonte subsuperficial, parece favorecer o acúmulo de argila em profundidade nos Espodossolos desenvolvidos no ambiente dos Tabuleiros Costeiros. Para esses solos, o caráter argissólico em nível de subgrupo do SiBCS deveria ser incorporado. Além disso, fases mineralógicas amorfas e, ou, de baixa cristalinidade de Al têm importante participação na formação de horizontes fortemente cimentados (duripãs) dos Espodossolos. Finalmente, a ODOE mostrou-se eficiente como indicador de solos sob processo de podzolização e poderia ser utilizada como critério taxonômico para classificação de Espodossolos pelo SiBCS.

ABSTRACT Small variations of relief may change drainage and runoff and hence promote the formation of sandy surface horizons and hardened subsurface horizons (fragipans and/or duripans) in Coastal Tablelands soils. This study aimed to investigate the pedogenesis on Coastal Tablelands area with low range altimetry in Paraíba state; secondly, we also sought to contribute to the improvement of the Brazilian Soil Classification System (BSCS). Four soil profiles ware described and collected to be submitted to routine physical and chemical analysis, determination of Fe, Al and Si extracted by sulfuric acid digestion, sodium citrate-bicarbonate-dithionite and acid ammonium oxalate, sodium pyrophosphate, and mineralogical analysis in the sand and clay fractions by X-ray diffractometry. Optical density of the oxalate extract (ODOE) was also determined; the results were statistically evaluated using the R software. Microrelief variations conditioning differentiated water flows, along with the sandy texture of the surface horizons (A and E) and the lower coarse sand/fine sand ratio in the subsurface horizon, seem to promote clay accumulation in depth in the Spodosols developed on Coastal Tablelands environments. For this soils, the argilluvic (argissólico) character at the subgroup level of the BSCS should be incorporated. In addition, Al amorphous mineral phases and/or poorly crystalline play an important role in the formation of strongly cemented horizons (duripans) of the Spodosols, as also reported by other authors. Finally, the ODOE showed to be an efficient indicator of soils under podzolization process, being possible its use as a taxonomic criterion for classification of Spodosols by the BSCS.

https://doi.org/10.1590/1983-21252019v32n219rc 574 downloads

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