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Fungal diversity in soils across a gradient of preserved Brazilian Cerrado
Ademir Sergio Ferreira de Araujo,Walderly Melgaço Bezerra,Vilma Maria dos Santos,Luis Alfredo Pinheiro Leal Nunes,Maria do Carmo Catanho Pereira de Lyra,Marcia do Vale Barreto Figueired,Vania Maria Ma 한국미생물학회 2017 The journal of microbiology Vol.55 No.4
The preserved Cerrado from Northeastern Brazil presentsdifferent physicochemical properties and plant diversity,which can influence the fungal communities. Therefore, weevaluated the fungal diversity in preserved sites, at Sete CidadesNational Park, across a gradient of vegetation that includedCampo graminoide, Cerrado stricto sensu, Cerradao,and Floresta decidual. Of all of the operational taxonomicunits (OTUs) obtained, the Floresta decidual presented thehighest richness. Ascomycota were the most abundant phylum(45%), followed by Basidiomycota (32%). Basal fungiand other phyla accounted for 23% of the total dataset. Agaricomycetes, Eurotiomycetes, Lecanoromycetes, Basidiobolus,Dothideomycetes, and Taphrinomycetes were themost abundant classes of fungi found across the gradient ofCerrado vegetation. In conclusion, our study suggests thatthe Brazilian Cerrado from Sete Cidades National Park presentsa high fungal diversity and includes sources of newfungal species for biotechnological purposes.
Natali Leidens,Ademir Franco,Marco C.J. Santos,Irina M. Makeeva,Â,ngela Fernandes 대한구강악안면외과학회 2020 대한구강악안면외과학회지 Vol.46 No.2
Chronic maxillary atelectasis (CMA) is a progressive alteration in the volume of the maxillary sinuses that may result in facial asymmetry. CMA in asymptomatic patients is known as silent sinus syndrome (SSS) and is a rare entity, especially in pediatric patients. This study reports a case of SSS in a pediatric patient who received an early diagnosis through cone-beam computed tomography (CBCT). An asymptomatic 12-year-old female patient in orthodontic treatment presented with opacification of the left maxillary sinus on a panoramic radiograph. Clinically, the patient had discrete hypoglobus and enophthalmos. CBCT and nasal video-endoscopy revealed ostiomeatal obstruction with bone deformity, leading to diagnosis of SSS. Endonasal endoscopic maxillary sinusotomy was performed. Two years later, the patient remained asymptomatic, and a second CBCT exam confirmed a stable condition. This case highlights the role of optimal radiographic interpretation for early diagnosis of maxillofacial alterations in pediatric patients.
Cesar Cavinato Cal Abad,Ademir Manuel do Nascimento,Leandro Eziquiel dos Santos,Diego Figueroa,Pamella Ramona,Michele Sartori,Katia B. Scapini,Oscar Albuquerque,Ivana Cinthya Moraes-Silva,Hélio José C 한국운동재활학회 2017 JER Vol.13 No.3
The present study aimed to compare the effects of moderate-intensity continuous and high-intensity interval exercise training (ET) on exercise tolerance, cardiac morphometry and function, hemodynamic, and car-diac autonomic modulation in myocardial infarcted mice. Wild-type mice (WT) were divided into four groups: sedentary WT (S); WT myo-cardium infarction sedentary (IS); WT myocardium infarction under-went to moderate-intensity continuous ET (MICT), and WT myocardium infarction underwent to high-intensity interval ET (MIIT). After 60 days of descending coronary artery ligation, moderate-intensity continuous ET consisted of running at 60% of maximum, while the high-intensity in-terval training consisted of eight sprints of 4 min at 80% of maximum and a 4-min recovery at 40% of maximum. Both exercises were per-formed 1 hr a day, 5 days a week, during 8 weeks. Results demonstrated that IS showed elevated exercise tolerance, as well as decreased he-modynamic and heart function, and autonomic control. On the other hand, both programs of ET were equally effective to increase all param-eters, without further differences between the groups. In conclusion, the results of the present study showed that myocardial infarction leads to damage in both investigated strains and the two types of physical ex-ercise attenuated the major impairments provoked by myocardial in-farction in exercise tolerance, cardiac structure, cardiac function, he-modynamic and cardiac autonomic modulation.
Thermal properties and curing kinetics of epoxy powder coatings containing graphene nanoplatelets
Andrielen Braz Vanzetto,Lucas Dall Agnol,Alessandra Lavoratti,Marcos Vinícius Marocco,Gabriel Gonem de Lima,Lilian Vanessa Rossa Beltrami,Ademir José Zattera,Diego Piazza 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.9
Graphene nanoplatelets (GNP) have excellent properties, such as high mechanical strength and good thermal conductivity, making them interesting nanofiller for their application in powder coatings. In this context, the aim of this study was to evaluate the thermal behavior and the curing kinetics of epoxy powder coatings containing GNP. The coatings were obtained by mixing in a ball mill followed by homogenization in molten state. The GNP were dispersed directly into the epoxy powder. The morphology, thermal stability and curing kinetics of the samples were evaluated. During the curing process, the GNP accelerated the onset of the reaction but ultimately caused steric impediment. From the results, the GNP incorporated to the solid epoxy resin for coatings behaved differently in each stage of the curing process. In general, while the direct dispersion of GNP in powder epoxy by dry mixing methods was not ideal, the thermal properties were improved, with GNP inducing a poor curing state where diffusion phenomena are predominant.
Olmiro Cezimbra de Souza Filho,Michele Rorato Sagrillo,Luiz Filipe Machado Garcia,Alencar Kolinski Machado,Francine Cadona,Euler Esteves Ribeiro,Marta Maria Medeiros Frescura Duarte,Ademir Farias More 한국식품영양과학회 2013 Journal of medicinal food Vol.16 No.11
Tucuma (Astrocaryum aculeatum) is an Amazonian fruit that presents high levels of carotenoids and other bioactive compounds such as quercetin. The extracts of tucuma peel and pulp present strong antioxidant activity which illustrate an elevated concentration that causes cytotoxic effects in human peripheral blood mononuclear cells (PBMCs). This study performed additional investigations to analyze the potential genotoxic effects of the tucuma extracts on PBMCs. The genotoxicity was evaluated by DNA fragmentation, Comet assay, and chromosomal instability G-band assays. The acute tucuma extract treatment showed genoprotective effects against DNA denaturation when compared with untreated PBMC cells. However, in the experiments with 24 and 72 h treatments to tucuma treatments, we observed low genotoxicity through a concentration of 100 lg/mL, some genotoxic effects related to intermediary concentrations (100–500 lg/mL), and more pronounced genotoxic effects on higher tucuma extract concentrations. After 24 h of treatment, the reactive oxygen species were similar among treatments and PBMC control groups. However, the caspase-1 activity related to the apoptosis and pyroptosis process increased significantly in higher tucuma concentrations. In summary, tucuma extracts, despite their higher antioxidant content and antioxidant activity, would present PBMCs genotoxic effects that are dependent on concentration and time exposition. These results need to be considered in future in vitro and in vivo studies of tucuma effects.