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The Use of Zinc Oxide Nanoparticles in Eva to Obtain Food Packing Films

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Advances in Nanoparticles 2020年第3期9卷 59-80页

作者： clara teixeira de oliveira Jorge Pereira Chimanowsky Junior Maria Inês Bruno Tavares Instituto de Macromoléculas Professora Eloisa Universidade Federal do Rio de Janeiro Centro de Tecnologia Bloco J Ilha do Fund&atilde o CP Rio de Janeiro RJ Brazil

The increasing demand for new packages with increased shelf life properties has stimulated the increase of research in the active packaging sector. The use of antimicrobial agents requires an in-depth study of their properties to avoid loss of efficiency of the polymer processing. In this context, the objective of this work was to evaluate the preparation of an 18% ethylene vinyl acetate copolymer (EVA) nanocomposite and zinc oxide (ZnO) as microbicidal nanoparticle, prepared in a monosulfon extruder. The nanoparticle was modified with octadecylamine and EVA 18 nanocomposite films were prepared and compared to the systems containing modified nanoparticle. These new materials were characterized by thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC), X-Ray Diffraction (XRD), Dynamic Mechanical Analysis (DMA), Time Domain Nuclear Magnetic Resonance (NMR) to investigate the effect of zinc oxide nanoparticles on thermal properties, EVA crystallinity and antimicrobial effect. The TGA showed a tendency of increase of the thermal stability in different proportions of ZnO. DSC results did not show significant changes in thermal parameters. The XRD analysis showed an increase in the degree of crystallinity of the nanocomposites in relation to the EVA matrix and change in the crystallinity with the increase of ZnO percentages. DMA analysis indicates change in structural organization through the variation of storage modulus, loss, and tan delta. Time domain NMR data corroborate with XRD data through the change in molecular mobility.

关键词： Food Packaging Ethylene Vinyl Acetate Copolymer Antimicrobial ZnO

Environmental parameters and tree physiology in two semiarid land use systems in Brazil

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Journal of Forestry Research 2019年第2期30卷 397-407页

作者： Marlete Moreira Mendes Ivanov Claudivan Feitosa de Lacerda Francisco Eden Fernandes Paiva Ana clara Rodrigues Cavalcante Teogenes Senna de oliveira departamento de Biologia Universidade Federal do Piaui departamento de Engenharia Agricola Campus do PiciUniversidade Federal do Ceara Embrapa Caprinos e Ovinos departamento de Solos Universidade Federal de Vicosa

To determine if reduced tree densities(number of trees per unit area) lead to changes in micro-meteorological and tree physiological characteristics, two areas with different tree densities were assessed. One was an agrosilvopastoral system(AGP) with low tree density, and the other, a secondary forest(SF) with greater tree numbers, both located in a semiarid region of Brazil. Data were collected simultaneously by two automated weather stations: rainfall, air(T_a) and soil temperatures(T_(s5 cm)), relative humidity(RHair), photosynthetically active radiation(PAR), soil moisture at two depths(M_(s30 cm)and M_(s50 cm)),and wind velocity(Vw). Net photosynthesis in Cordia oncocalyx Allema?o trees was measured with an infrared gas analyzer in February, March, May, July, August and September 2011, which encompasses a rainy period followed by a dry period. Average values of Ta, T_(s5 cm), Vwand PAR were greater and average values of RHairand M_(s50 cm) were lesser in the AGP. Photosynthetic rates were greater in plants growing under the AGP at the onset of the dry season when Vw, PAR and T_(s5 cm)were greater and M_(s50 cm) was lesser. Photosynthetic rates correlated strongly with physical parameters during the dry season, especially under SF. Differences in tree numbers between AGP and SF led to differences in physical environmental parameters;however, the latter had less influence on photosynthetic rates in C. oncocalyx during the rainy season. During the dry season, all physical parameters had an impact on net photosynthesis under SF but not under AGP. This indicates a certain independence of plants in AGP.

关键词： Agrosilvopastoral system Net photosynthesis Secondary forest Tree density

Effectiveness of Helicobacter pylori eradication in the treatment of early-stage gastric mucosa-associated lymphoid tissue lymphoma:An up-to-date meta-analysis

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World Journal of Gastroenterology 2023年第14期29卷 2202-2221页

作者： Fabian Fellipe Bueno Lemos Caroline Tianeze de Castro Mariana Santos Calmon Marcel Silva Luz Samuel Luca Rocha Pinheiro clara Faria Souza Mendes dos Santos Gabriel Lima Correa Santos Hanna Santos Marques Henrique Affonso delgado Kádima Nayara teixeira Cláudio Lima Souza Márcio Vasconcelos oliveira Fabrício Freire de Melo Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029094BahiaBrazil Instituto de Saúde Coletiva Universidade Federal da BahiaSalvador 40110040BahiaBrazil Campus Vitória da Conquista Universidade Estadual do Sudoeste da BahiaVitória da Conquista 45029094BahiaBrazil Campus Toledo Universidade Federal do ParanáToledo 85919899ParanáBrazil

BACKGROUND Gastric mucosa-associated lymphoid tissue(MALT)lymphoma(GML)is usually a low-grade B-cell neoplasia strongly associated with Helicobacter pylori(***)-induced chronic *** practice guidelines currently recommend *** eradication as the preferred initial treatment for early-stage *** determine the practical effect of bacterial eradication as the sole initial therapy for early-stage GML,an updated analysis and review of available evidence is *** To perform a meta-analysis to assess the rate of complete remission(CR)of ***-positive early-stage GML following bacterial *** We performed independent,computer-assisted literature searches using the PubMed/MEDLINE,Embase,and Cochrane Central databases through September *** and retrospective observational studies evaluating the CR of early-stage GML following bacterial eradication in ***-positive *** risk of bias was assessed using Joanna Briggs Institute(JBI)Critical Appraisal *** pooled estimate of the complete histopathological remission rate and respective confidence intervals(95%CI)were calculated following the random-effects *** and inconsistency were assessed using Cochran’s Q test and I2 statistic,and heterogeneity was defined as P50%,*** and meta-regression analyses were conducted to explore potential sources of *** The titles and abstracts of 1576 studies were screened;96 articles were retrieved and selected for full-text ***,61 studies were included in the proportional meta-analysis(P-MA).Forty-six were prospective and fifteen were retrospective uncontrolled,single-arm,observational *** overall risk of bias was low to moderate in all but a single report,with an average critical appraisal score across all studies of 79.02%.A total of 2936 ***-positive early-stage GML patients,in whom *** was successfully eradicated,were incl

关键词： Lymphoma B-cell Marginal zone Gastric mucosa-associated lymphoid tissue lymphoma Stomach lymphoma Helicobacter pylori Therapeutics Eradication therapy

Effect of a 10-Week Stretching Program of the Triceps Surae Muscle Architecture and Tendon Mechanical Properties

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Journal of Science in Sport and Exercise 2021年第2期3卷 107-114页

作者： Carolina C.Peixinho Gabriel A.Silva Maria clara A.Brandão Luciano L.Menegaldo Liliam F.de oliveira Biomedical Engineering Program Federal University of Rio de JaneiroBloco Hsala 327Av.Horácio Macedo 2030Rio de JaneiroRJBrazil School of Physical Education and Sports Federal University of Rio de JaneiroRio de JaneiroRJBrazil

Purpose The present study aimed to test if a long-term passive stretching training causes adaptations of the medial gastroc-nemius architecture and the Achilles tendon (AT) tangent *** A total of 20 males took part in the *** stretching group (n =12),performed stretching exercises for the plantar flexors for 10 weeks,4-5 times a week,which comprised two static positions sustained twice each during 30 *** For the stretching group,maximum dorsiflexion angle,peak passive torque,and muscle-tendon unit maximum length significantly increased after *** other differences were found related to muscle architecture and AT tangent *** Joint amplitude gain after a long-term stretching of the triceps surae was not accompanied by structural or mechanical changes of the medial gastrocnemius and AT tendon,and seems to reflect an increasing stretch tolerance level.

关键词： Stretching Muscle architecture Achilles tendon Triceps surae Tangent modulus

Each Epiphyte on Its Branch: A Comparative Study between Different Phorophytes

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Agricultural Sciences 2023年第5期14卷 636-644页

作者： Johnatan Jair de Paula Marchiori Vinicius de Souza oliveira Eduarda Carriço Ana clara Bayer Bernabé Anderson Mathias Holtz Ronilda Lana Aguiar Ana Beatriz Mamedes Piffer Gilcéa teixeira Fontana Boone Lusiane de Sousa Ferreira Bruna de oliveira Magnani Federal University Rural of Rio de Janeiro Seropédica Brazil Center for Agricultural Sciences and Engineering Federal University of Espírito Santo Alegre Brazil Federal Institute of Espírito Santo Campus Itapina Colatina Brazil State University Paulista “Júlio de Mesquita Filho” Botucatu Brazil

Epiphytes are plants that use the mechanical support provided by a host tree, called phorophytes, without emitting haustorial structures. Constituting an important component of the flora, playing an important role in the maintenance of ecosystems, such as water and nutrient cycling, in addition to providing resources, sometimes unique, such as food and shelter, for the canopy fauna. However, the epiphytic flora may show high beta diversity, even when compared with different phorophytes, possibly as a response to the dendromorphological characteristics of the phorophyte. Thus, this work aims to: 1) compare whether the species richness of epiphytes differs in trees with different morphological characteristics, and 2) compare species composition among three tree species. For this, 10 individuals of three tree species were selected: Guaria guidonia, Ficus sp., and Roystonea oleracea. In each individual, the number of species (richness) of vascular epiphytes was recorded and obtained from the species composition. To test differences in richness values between the three trees, we used analysis of variance (ANOVA) followed by Tukey’s test. To understand whether the epiphyte community formed separate groups according to the tree species used, we used the available non-metric multidimensional scaling method (NMDS). Thirty-four species of epiphytes were found in the 30 phorophytes surveyed. The three tree species showed significantly different richness, with the highest found in Guarea guidonea and the lowest in Roystonea oleraceae. The NMDS showed that epiphytes group the three tree species into distinct groups, although Ficus sp individuals present a transitional community between the two other species. Thus, the results suggest that the differences in the richness and composition of the epiphytic flora of the different phorophytes are influenced by their distinct morphological characteristics.

关键词： Atlantic Forest Ecological Reserve Tree Species

Haploidentical hematopoietic stem cell transplantation as promising therapy in the improved survival of pediatric patients with leukemias and myelodysplasias

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World Journal of Meta-Analysis 2023年第5期11卷 181-195页

作者： Ana clara Carvalho Cardoso Brito Everton oliveira Carneiro Ribeiro Fabrício Freire de Melo Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil

BACKGROUND Haploidentical hematopoietic stem cell transplantation(Haplo-HSCT)is often performed in children with hematologic *** with the gap in the literature regarding the approach to experiences related to Haplo-HSCT with pediatric patients with leukemias and myelodysplasias aged up to 18 years,there was an interest in exploring the clinical outcomes of patients undergoing this *** To identify and summarize the scientific contributions available on Haplo-HSCT performed in the last 10 years in children and adolescents with myeloid and lymphoid leukemias and myelodysplasias,aged up to 18 *** This is a descriptive systematic *** extracted data including characteristics of participants,health condition,characteristics of the donation,conditioning regimen,recurrent clinical complications and clinical *** Virtual Health Library Brazil,PubMed,EMBASE,and SciELO platforms were used,finding a total of 1052 *** the eligibility criteria and complete reading of the texts,18 articles were included for *** The total sample of all study cohorts was 1825 patients,mostly male,the highest reported median age was 15.0 years and the lowest was 1.2 *** graftversus-host disease and chronic graft-versus-host disease were observed in almost all ***,graft rejection and delayed immune recovery were identified as major clinical ***-transplant minimal positive residual disease was identified in 288 *** are also among the main clinical complications,viral,bacterial and fungal infections being *** is observed that in the 5-year interval,the lowest rates of EFS and overall survival(OS)were 29.5%and 68.0%,***,the highest rates of EFS and OS,in the same interval,were 80.1%and 81.0%.CONCLUSION Haplo-HSCT represents a promising therapy,considering the potential number of possible donors and the conditioning and treatment platforms that can be *** res

关键词： Haploidentical Stem cell transplantation Children Cancer Treatment outcome Prognosis

What Do Seedlings Like? The Relationship between Seedling Richness and Abundance with Abiotic Factors

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Agricultural Sciences 2023年第6期14卷 767-774页

作者： Johnatan Jair de Paula Marchiori Vinicius de Souza oliveira Eduarda Carriço Ana clara Bayer Bernabé Anderson Mathias Holtz Ronilda Lana Aguiar Ana Beatriz Mamedes Piffer Gilcéa teixeira Fontana Boone Ricardo Amaro de Sales Lusiane de Sousa Ferreira department of Environmental Sciences/Phytotechnics department Federal University Rural of Rio de Janeiro-Seropédica Rio de Janeiro Brazil Center for Agricultural Sciences and Engineering Federal University of Espírito Santo Alegre Espírito Santo Brazil Laboratory of Entomology and Acarology Federal Institute of Espírito Santo Campus Itapina Colatina Espírito Santo Brazil Agriculture department State University Paulista “Júlio de Mesquita Filho” Botucatu S&#227o Paulo Brazil

Natural regeneration is the interaction of natural processes to restore the forest ecosystem. Its dynamics are influenced by the intensity and extent of a series of abiotic and biotic factors, which may be intrinsic or extrinsic. Knowing the importance of establishing natural regeneration within forest ecosystems, this work aimed to evaluate whether litter depth and trail distance influenced seedling abundance and richness in a forest fragment undergoing natural restoration. The hypothesis tested in this research was that abiotic factors influence the natural regeneration of this forest since they are factors that are directly linked to seed germination and seedling establishment. 30 plots of 1 m2 were randomly analyzed within the forest located on the brown trail. A millimeter ruler was used to diagnose the litter depth and a measuring tape to measure the distance from the plot to the edge. In each plot the seedlings were morpho-specified and each morphospecies had the number of individuals counted. Linear regression tests were performed to assess the relationships between species richness and trail distance and litter depth. The same was done for species abundance. All results showed that there is no relationship pattern between any of the variables. Other factors also influence the regeneration of a forest, such as luminosity and seed bank. Furthermore, litter depth is related to the successional stage of the forest. It was concluded that the abiotic factors tested do not influence the regeneration of the study area.

关键词： Abiotic Factors Natural Regeneration Forest Ecosystem

Effectiveness of BNT162b2 and CoronaVac vaccines against omicron in children aged 5 to 11 years

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World Journal of Pediatrics 2023年第10期19卷 949-960页

作者： Eduardo A.oliveira Maria Christina L.oliveira Ana Cristina Simões e Silva Enrico A.Colosimo Robert H.Mak Mariana A.Vasconcelos Ludmila R.Silva Daniella B.Martelli clara C.Pinhati Hercílio Martelli-Júnior department of Pediatrics Health Sciences Postgraduate ProgramSchool of MedicineFederal University of Minas Gerais(UFMG)R.Engenheiro Amaro Lanari 389/501Belo HorizonteMG30130-100Brazil department of Statistics Federal University of Minas GeraisBelo HorizonteMGBrazil department of Pediatrics Rady Children’s HospitalUniversity of CaliforniaLa JollaSan DiegoCAUSA Health Science/Postgraduate Program in Nursing.School of Nursing Federal University of Minas Gerais(UFMG)Belo HorizonteMG30130-100Brazil Health Science/Primary Care Postgraduate Program State University of Montes Claros(Unimontes)Montes ClarosMG39401-089Brazil

Background This study aimed to estimate vaccine effectiveness(VE)against omicron variant infection and severe corona virus disease 2019(COVID-19)in children aged 5–11 years hospitalized with acute respiratory *** A test-negative,case–control analysis was conducted from February 2022 to June *** enrolled 6950 eligible children,including 1102 cases and 5848 *** was calculated after immunization with one and two doses of BNT162b2 or *** outcomes were hospitalization with acute respiratory symptoms and detection of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection and severe *** adjusted odds ratio for the association of prior vaccination and outcomes was used to estimate *** For fully vaccinated children,the overall estimated VE against hospitalization with SARS-CoV-2 infection was 42%[95%confidence interval(CI)26 to 54].VE peaked at 29–42 days(67%,95%CI 40%to 82%)and then declined to 19%(95%CI,−20%to 45%)at 57–120 days after the second *** BNT162b2 vaccine had a similar VE against hospitalization with SARS-CoV-2 infection(45%,95%CI,20 to 61)compared to the CoronaVac vaccine(40%,95%CI,17%to 56%).Among cases,56(5%)children died;53(94.6%)were not fully *** cases,the two-dose schedule effectiveness against ICU admission,need for invasive ventilation,severe illness,and death were 10%(95%CI,−54%–45%),22%(95%CI−70%–68%),12%(95%CI,−62%–52%),and 16%(95%CI,−77%–75%),*** For hospitalized children aged 5–11 years during the omicron-predominant period in Brazil,two doses of both vaccines had moderate effectiveness against hospitalization with acute respiratory symptoms and SARS-CoV-2 infection and offered limited protection against endpoints of COVID-19 severity.

关键词： Children COVID-19 Effectiveness Omicron Vaccine

Histone acetylation and its role in embryonic stem cell differentiation

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World Journal of Stem Cells 2010年第6期2卷 121-126页

作者： Naiara Z Saraiva clara S oliveira Joaquim M Garcia department of Preventive Veterinary Medicine and Animal Repro-duction FCAV-Sao Paulo State University14884-900 JaboticabalBrazil

The understanding of mechanisms leading to cellular differentiation is the main aim of numerous *** of DNA to transcription factors depends on local chromatin structure and chromatin compaction inhibits gene *** acetylation correlates with an open chromatin structure and increased gene *** transcription levels are changed in early embryonic stem cells differentiation in a tissuespecific manner and epigenetic marks are modified,including increased global acetylation *** of histone deacetylases activity might be an interesting tool to generate populations of specific cell types for transplantation ***,this review aims to show recent findings on histone acetylation,a post translational modif ication and its manipulation in embryonic stem cells differentiation.

关键词： Embryonic stem cells Cellular differentiation Epigenetics Histone acetylation