120 results match your criteria: "Federal University of Amapá - UNIFAP[Affiliation]"

Filling the gaps on parasites of : Helminth community structure of (Anura: Hylidae) from the Brazilian Amazon.

Int J Parasitol Parasites Wildl

December 2024

Laboratory of Cellular Biology and Helminthology "Profa. Dra. Reinalda Marisa Lanfredi", Institute of Biological Sciences, Federal University of Pará (UFPA), Av. Augusto Correa 01, Guamá, Belém, Pará, 66075-110, Brazil.

is an arboreal anuran widely distributed in South America. However, there are no parasitological studies conducted on the species, resulting in a parasite fauna completely unknown. Thus, this study aims to characterize the parasitic community structure of in the municipality of Pedra Branca do Amapari, Amapá state, Amazon region, Brazil.

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Primaquine for uncomplicated Plasmodium vivax malaria in children younger than 15 years: a systematic review and individual patient data meta-analysis.

Lancet Child Adolesc Health

November 2024

Global Health Division, Menzies School of Health Research and Charles Darwin University, Darwin, NT, Australia; WorldWide Antimalarial Resistance Network, Asia-Pacific Regional Centre, Melbourne, VIC, Australia; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK.

Article Synopsis
  • This study investigates the effectiveness and safety of different primaquine dosing strategies in preventing relapsing Plasmodium vivax malaria in children under 15 years.
  • A systematic review was conducted, analyzing various studies involving children treated with primaquine, focusing on those who received treatment over multiple days and were followed up for at least 28 days.
  • The findings from 3514 children across 27 studies were compiled to analyze different dosing regimens, assess the risk of recurrent malaria, and evaluate tolerability and safety concerning adverse effects.
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Optimal inventorying and monitoring of taxonomic, phylogenetic and functional diversity.

PLoS One

July 2024

Programa de Pós-Graduação em Biodiversidade Tropical, Universidade Federal do Amapá (UNIFAP), Macapá, Brazil.

Comparable data is essential to understand biodiversity patterns. While assemblage or community inventorying requires comprehensive sampling, monitoring focuses on as few components as possible to detect changes. Quantifying species, their evolutionary history, and the way they interact requires studying changes in taxonomic (TD), phylogenetic (PD) and functional diversity (FD).

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Article Synopsis
  • Flooding in the Amazon affects which tree species can grow together because they have different abilities to survive in wet conditions.!
  • Researchers studied tree communities along the Falsino River to see how flooding changes the types of trees found in different areas.!
  • They found that areas with frequent flooding have fewer tree types and are less diverse, while drier areas support more varied and unique tree species.!
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Is there only one species of Hepatozoon infecting Brazilian caimans? Integrative taxonomy unveiling the parasite's diversity.

Braz J Biol

June 2024

Universidade Estadual Paulista - UNESP, Instituto de Biociências, Departamento de Biodiversidade e Bioestatística, Setor de Parasitologia, Botucatu, SP, Brasil.

Hepatozoon spp. are the most common haemoparasites reported from reptiles around the world, however, only six species have been described infecting crocodilians. In Brazil, Hepatozoon caimani Carini, 1909 is currently the only recognized species from the caiman hosts.

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Article Synopsis
  • Silver/magnesium doped hydroxyapatite (AgMgHAp) coatings were created on silicon substrates using dip coating, with various characterization methods confirming their composition and structure.
  • The coatings exhibited a uniform layer of nanoconglomerates, confirmed by AFM, while other techniques indicated the presence of key elements and molecular vibrations.
  • Antifungal tests showed that AgMgHAp coatings effectively inhibit the growth of Candida albicans, preventing fungal adhesion and biofilm formation, with efficacy varying by incubation time.
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n. sp. (Eucestoda: Proteocephalidae), a parasite of (Linnaeus, 1758), with redescription of (Santos and Rolas, 1973) from the Brazilian Amazon.

Int J Parasitol Parasites Wildl

August 2024

Laboratory of Cellular Biology and Helminthology "Profa. Dra. Reinalda Marisa Lanfredi", Institute of Biological Sciences, Federal University of Pará (UFPA), Av. Augusto Correa 01, Guamá, Belem, Para, 66075-110, Brazil.

is the most diverse genus among proteocephalids, composed of species commonly found parasitizing snakes worldwide. However, the diversity of in the Neotropical region is still underestimated. This study describes n.

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Camera trap surveys of Atlantic Forest mammals: A data set for analyses considering imperfect detection (2004-2020).

Ecology

May 2024

Núcleo de Ecologia de Estradas e Ferrovias (NERF), Departamento de Ecologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.

Camera traps became the main observational method of a myriad of species over large areas. Data sets from camera traps can be used to describe the patterns and monitor the occupancy, abundance, and richness of wildlife, essential information for conservation in times of rapid climate and land-cover changes. Habitat loss and poaching are responsible for historical population losses of mammals in the Atlantic Forest biodiversity hotspot, especially for medium to large-sized species.

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Mercury contamination in the Amazon arising from both natural sources and intensive mining activities in the region is a significant public health concern. This metal is used to separate Au from sediments. Accordingly, this study aimed to assess the impact of mining on mercury contamination in the animal and human populations of the Amazon.

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Characterization of bergamot essential oil: chemical, microbiological and colloidal aspects.

Braz J Biol

March 2024

Universidade Federal do Amapá - UNIFAP, Programa de Pós-graduação em Ciências Farmacêuticas, Macapá, AP, Brasil.

Citrus bergamia is a citric species known as bergamot. The species is widely used due to its derivatives, such as juices, extracts, and essential oil. Specifically, the bergamot essential oil (BEO) is of great interest, with a chemical composition rich in terpenes and esters.

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Blast furnace dust waste (BFDW) proved efficient as a photocatalyst for the decolorization of methylene blue (MB) dye in water. Structural analysis unequivocally identified α-FeO as the predominant phase, constituting approximately 92%, with a porous surface showcasing unique 10-30 nm agglomerated nanoparticles. Chemical and thermal analyses indicated surface-bound water and carbonate molecules, with the main phase's thermal stability up to 900 °C.

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Nanoscale morphology, optical dynamics and gas sensor of porous silicon.

Sci Rep

February 2024

Quantum Technologies Research Center (QTRC), Science and Research Branch, Islamic Azad University, Tehran, Iran.

We investigated the multifaceted gas sensing properties of porous silicon thin films electrodeposited onto (100) oriented P-type silicon wafers substrates. Our investigation delves into morphological, optical properties, and sensing capabilities, aiming to optimize their use as efficient gas sensors. Morphological analysis revealed the development of unique surfaces with distinct characteristics compared to untreated sample, yielding substantially rougher yet flat surfaces, corroborated by Minkowski Functionals analysis.

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The new magnesium-doped hydroxyapatite in dextran matrix (10MgHApD) nanocomposites were synthesized using coprecipitation technique. A spherical morphology was observed by scanning electron microscopy (SEM). The X-ray diffraction (XRD) characterization results show hydroxyapatite hexagonal phase formation.

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(1) Background: Leishmaniasis refers to a group of anthropozoonotic diseases caused by Leishmania. The major chemotherapeutic agent used for its treatment is Glucantime, but the search continues for new compounds that are economically viable and act on the protozoan without causing damage to the host cell. As an alternative approach, this study used a combination of copaiba oil (CO) and kojic acid (KA) to determine their in vitro action on host cells, on the protozoan and its interaction with macrophages.

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Role of the Solvent and Intramolecular Hydrogen Bonds in the Antioxidative Mechanism of Prenylisoflavone from Leaves of .

J Phys Chem A

December 2023

Instituto de Física, Universidade de São Paulo, Rua do Matão 1371, São Paulo, São Paulo 05588-090, Brazil.

This work discusses the electron structure, antioxidative properties, and solvent contribution of two new antioxidant molecules discovered, named and , extracted from a medicinal plant called , found in the Amazon rain-forest. To gain a better understanding, a study using density functional theory coupled with the polarizable-continuum model and the standard 6-311++G(d,p) basis set was conducted. The results indicate that has a higher antioxidant potential than , confirming the experimental expectations.

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Mosquitoes are one of the main vectors of many important diseases and their degree of resistance to chemical insecticides has increased. Nowadays, it has become crucial to identify novel plant larvicides with an eco-friendly impact. The components of essential oils from Jacq.

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Introduction: Transvenous temporary pacemaker (TvTP) implantation is a critical procedure often performed under time limitations, playing a crucial role in patient survival. However, the amount of training provided for resident cardiologists is variable, due to the availability of patients. Thus, the use of simulators for this cardiologic procedure could be used as training tools.

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Saturated monocarboxylic fatty acids with long carbon chains are organic compounds widely used in several applied fields, such as energy production, thermal energy storage, antibactericidal, antimicrobial, among others. In this research, a new polymorphic phase of arachidic acid (AA) crystal was synthesized and its structural and vibrational properties were studied by single-crystal X-ray diffraction (XRD) and polarized Raman scattering. The new structure of AA was solved at two different temperature conditions (100 and 300 K).

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Background And Purpose: Physiotherapists worldwide are encouraged to integrate evidence-based practice (EBP) to provide safer and effective services. However, for professionals to consolidate this practice, the contact with EBP must begin at the university. In this study, we aimed to map and analyze the distribution of EBP courses and their characteristics in undergraduate physiotherapy programs in Brazil.

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Background: Imperfect adherence is a major barrier to effective primaquine radical cure of Plasmodium vivax. This study investigated the effect of reduced adherence on the risk of P. vivax recurrence.

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In the present study, we report the development and characterization of composite layers (by spin coating) based on magnesium-doped hydroxyapatite in a chitosan matrix, containing human osteosarcoma MG63 cells anchored. Studies regarding the biocompatibility of the composite layers were performed with the aid of a MTT (3-4,5-Dimethylthiazol 2,5-diphenyltetrazolium bromide) assay. The data determined that the composite layers did not inhibit the growth and adhesion of MG63 cells to their surfaces exhibiting good biocompatibility properties.

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More than 10,000 pre-Columbian earthworks are still hidden throughout Amazonia.

Science

October 2023

Division of Earth Observation and Geoinformatics, General Coordination of Earth Sciences, National Institute for Space Research (INPE), São José dos Campos, SP, Brazil.

Indigenous societies are known to have occupied the Amazon basin for more than 12,000 years, but the scale of their influence on Amazonian forests remains uncertain. We report the discovery, using LIDAR (light detection and ranging) information from across the basin, of 24 previously undetected pre-Columbian earthworks beneath the forest canopy. Modeled distribution and abundance of large-scale archaeological sites across Amazonia suggest that between 10,272 and 23,648 sites remain to be discovered and that most will be found in the southwest.

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Rheumatoid arthritis (RA) is an inflammatory, systemic and chronic disease that mainly affects the joints. It is characterized mainly by pain, edema and joint stiffness, which can lead to significant loss of functional capacity and quality of life. Several physical therapy resources are used in the treatment of AR, such as low-level laser therapy (LLLT) and its analgesic and anti-inflammatory effects.

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Evaluating the roughness dynamics of kefir biofilms grown on Amazon cupuaçu juice: a monofractal and multifractal approach.

Microscopy (Oxf)

February 2024

Laboratory of Synthesis of Nanomaterials and Nanoscopy, Department of Physics, Federal University of Amazonas-UFAM, Av. General Rodrigo Octavio Jordão Ramos, 1200 - Coroado I, Manaus, Amazonas 69.067-005, Brazil.

We conducted a comprehensive analysis of the surface microtexture of kefir biofilms grown on Theobroma grandiflorum Shum (cupuaçu) juice using atomic force microscopy. Our goal was to investigate the unique monofractal and multifractal spatial patterns of these biofilms to complement the existing limited literature. The biofilms were prepared dispersing four different concentrations of kefir grains in cupuaçu juice.

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Global review and guidelines to avoid opportunistic predation of birds and bats in mist nets.

Ecol Evol

August 2023

Programa de Pós-Graduação em Biodiversidade e Meio Ambiente Universidade Federal da Grande Dourados (UFGD) Dourados Brazil.

Mist nets are one of the most widely used techniques in the study of birds and bats worldwide. However, a number of risks are involved, including opportunistic predation. Given this potential cost, here we: (1) review the global literature to understand the factors that might contribute to predation risk for birds and bats captured in mist nets; (2) review existing guidelines for best practice use of mist nets; and (3) based on our reviews, recommend new guidelines for the use of mist nets to minimize the risk of opportunistic predation.

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