2,603 results match your criteria: "Fluminense Federal University.[Affiliation]"

Article Synopsis
  • The study aimed to assess the cyclic fatigue strength of rotary endodontic instruments using two different movement techniques: continuous clockwise rotation and clockwise reciprocation with optimum torque reverse (OTR) motion.
  • ProTaper Next X1 and X2 instruments were tested in a standard artificial canal, with the results showing that OTR movement significantly increased the time to fracture compared to continuous rotation.
  • Although both instrument types displayed signs of cyclic fatigue failure, the OTR motion appeared to improve instrument longevity by evenly distributing mechanical stress, leading to a delay in catastrophic failure.
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Background: The Amazon forest produces a variety of fruits with strong biotechnological potential. However, their use in dairy products is restricted.

Scope And Approach: This work aims to carry out a bibliographic survey on the technological applications of select edible Amazonian fruits and their residues in the elaboration and quality of dairy products.

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Objectives: To investigate the association between genetic polymorphisms in suppressor of cytokine signaling-1 (SOCS-1), tumor necrosis factor-⍺ (TNF-α) and its receptors 1 and 2 (TNFRSF1A and TNFRSF1B), receptor activator of nuclear factor kappa-b (RANK), receptor activator of nuclear factor-kappa B ligand (RANKL) and osteoprotegerin (OPG), and persistent apical periodontitis (PAP).

Methods: Patients with pulp necrosis and apical periodontitis at the time of non-surgical root canal treatment were followed up for at least one year. A total of 423 subjects were included, 172 with signs/symptoms of PAP and 251 with apical periodontitis healed.

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To provide an overview of the use of autogenous platelet concentrates (APCs) in periodontal regeneration and to conduct a systematic review (SR) of the treatment outcomes of periodontal intrabony defects by using platelet-rich fibrin (PRF) compared with other commonly utilized modalities. The eligibility criteria comprised randomized controlled trials (RCTs) comparing the clinical outcomes of PRF with that of other modalities. Studies were classified into 21 categories and into five different groups as follows: Group I (1) open flap debridement (OFD) alone versus OFD/PRF, (2) OFD versus Titanium-PRF (T-PRF) Group II, (3) Comparative PRF protocols (PRF vs.

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  • - Parkinson's disease (PD) is a progressive neurological condition leading to both motor symptoms (like tremors and stiffness) and non-motor symptoms that affect daily living, with an increasing prevalence, especially in older populations.
  • - A review of treatment options for PD shows an uptick in research since 2000, peaking from 2011 to 2016, with significant contributions from the U.S., China, Canada, and the U.K.
  • - The study used a bibliometric analysis of over 3,700 PD publications to identify key researchers, trends in pharmacological therapies, and the impact of major institutions on current research and treatment methodologies.
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Background: Malaria is an infectious disease caused by the Plasmodium species and is a global burden. When not treated correctly, it can reemerge as a relapse or recrudescence. Malaria relapse cases can contribute to maintaining active transmission chains and can influence the patient to develop severe malaria, potentially leading to hospitalization or death.

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Background And Objectives: Pulp calcification is associated with many factors and triggers, including individual genetic predisposition and orthodontic forces. This study aimed to investigate whether genetic polymorphisms in are associated with a risk of dental pulp calcifications in orthodontic patients.

Materials And Methods: Digital orthopantomography (OPG) and genomic DNA from 132 patients were analyzed in this cross-sectional study.

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Peripheral nerve injuries (PNIs) pose significant clinical challenges due to their complex healing processes and the often incomplete functional recovery. This review and bibliometric analysis aimed to provide a comprehensive overview of advancements in peripheral nerve regeneration research, focusing on trends, influential studies, and emerging areas. By analyzing 2921 publications from the Web of Science Core Collection, key themes such as nerve regeneration, repair, and the critical role of Schwann cells were identified.

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The botulinum toxin (BT) is US Food and Drug Administration-approved for therapeutic applications in different medical conditions. However, BT is not considered an obstructive sleep apnea (OSA) therapy. OSA is characterized by recurrent airway collapse during sleep, leading to intermittent hypoxia, hypercapnia, and arousal.

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Coral microbiomes play crucial roles in holobiont homeostasis and adaptation. The host's ability to populate broad ecological niches and to cope with environmental changes seems to be related to the flexibility of the coral microbiome. By means of high-throughput DNA sequencing we characterized simultaneously both bacterial (16S rRNA) and Symbiodiniaceae (ITS2) communities of four reef-building coral species (Mussismilia braziliensis, Mussismilia harttii, Montastraea cavernosa, and Favia gravida) that differ in geographic distribution and niche specificity.

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Overexpression of Osteopontin-a and Osteopontin-c Splice Variants Are Worse Prognostic Features in Colorectal Cancer.

Diagnostics (Basel)

September 2024

Hemato-Oncology Molecular Program, National Institute of Cancer, 23rd Red Cross Square, 6th Floor, Rio de Janeiro 20230-130, RJ, Brazil.

: Osteopontin (OPN) is a glycoprotein involved in various physiological and pathological processes, and its aberrant expression in cancer cells is closely linked to tumor progression. In colorectal cancer (CRC), OPN is overexpressed, but the roles of its splice variants (OPN-SVs), OPNa, OPNb, and OPNc, are not well understood. This study aimed to characterize the expression patterns of OPN-SVs and their potential diagnostic and prognostic implications in CRC using transcriptomic data deposited in TSVdb and TCGA.

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The digital twin (DT), which involves creating a virtual replica of a physical asset or system, has emerged as a transformative set of tools across various industries. In the oil and gas (O&G) industry, the development of DTs represents a significant evolution in how companies manage complex operations, enhance safety, and optimize decision-making processes. Despite these significant advancements, the underlying tools, technologies, and frameworks for developing DTs in O&G applications remain non-standardized and unfamiliar to many O&G practitioners, highlighting the need for a systematic literature review (SLR) on the topic.

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Magnetic Nanoparticles in Biopolymer Fibers: Fabrication Techniques and Characterization Methods.

Polymers (Basel)

October 2024

Graduate Program in Metallurgical Engineering (PPGEM), EEIMVR, Fluminense Federal University, Avenida dos Trabalhadores, 420, Volta Redonda 27225-125, RJ, Brazil.

Hybrid nanocomposites combining biopolymer fibers incorporated with nanoparticles (NPs) have received increasing attention due to their remarkable characteristics. Inorganic NPs are typically chosen for their properties, such as magnetism and thermal or electrical conductivity, for example. Meanwhile, the biopolymer fiber component is a backbone, and could act as a support structure for the NPs.

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Article Synopsis
  • Nattokinase (NK), derived from the traditional Asian food natto, has been shown to lower cardiovascular disease (CVD) mortality due to its properties that help dissolve blood clots and prevent thrombosis.
  • Recent studies suggest NK may also combat inflammation and oxidative stress, linking it to potential benefits in treating various non-communicable diseases (NCDs).
  • This review analyzes the current literature and emphasizes NK's therapeutic promise, highlighting its dual role in improving cardiovascular health and its newfound anti-inflammatory and antioxidant benefits.
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Parsonage-Turner syndrome (PTS) is a non-traumatic disorder of the shoulder girdle, marked by sudden-onset neuropathic pain, spontaneous improvement, and progression to paralysis, muscle weakness, and atrophy. Various etiological factors have been linked to PTS. This clinical case report documents the development of PTS following dengue virus exposure.

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Does temperature abuse during storage, distribution, marketing, and consumption of unpasteurized frozen açaí pulp increase microbial hazards? This study investigated the behavior of potentially pathogenic ( spp.) and spoilage (mesophilic bacteria, yeasts and molds) microorganisms in two simulated thawing conditions: under refrigeration and at room temperature. The effect of repeated cold chain abuse was observed by thawing and refreezing (-20°C) açaí pulp four times over a period of 90 days.

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Malaria is a global health challenge, and international efforts are underway to alleviate its impact by 2035. Within the 249 million global cases, 0.6 million occur in the Americas, mainly in Venezuela, Brazil, and Colombia.

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Functions of TRPs in retinal tissue in physiological and pathological conditions.

Front Mol Neurosci

September 2024

Laboratory Neurobiology of the Retina, Department of Neurobiology and Program of Biomedical Sciences, Biology Institute, Fluminense Federal University Niterói, Rio de Janeiro, Brazil.

The Transient Receptor Potential (TRP) constitutes a family of channels subdivided into seven subfamilies: Ankyrin (TRPA), Canonical (TRPC), Melastatin (TRPM), Mucolipin (TRPML), no-mechano-potential C (TRPN), Polycystic (TRPP), and Vanilloid (TRPV). Although they are structurally similar to one another, the peculiarities of each subfamily are key to the response to stimuli and the signaling pathway that each one triggers. TRPs are non-selective cation channels, most of which are permeable to Ca, which is a well-established second messenger that modulates several intracellular signaling pathways and is involved in physiological and pathological conditions in various cell types.

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Article Synopsis
  • The text explains that a special molecule called miR-155 is linked to diseases that don't spread from person to person and can make inflammation and stress in the body worse.
  • It shows that healthy eating and regular exercise can help control miR-155 and reduce the risk of these diseases.
  • The review highlights that certain foods and being active can help lower miR-155 levels and improve the body's healing and immune responses.
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  • Toxoplasma gondii is a zoonotic parasite that can infect humans through contaminated water, raw foods, or undercooked meat, and recent studies indicate fresh goat milk may pose a risk for human infection.
  • This study aimed to evaluate how long tachyzoites survive in fresh goat milk and their infectivity using Swiss Webster mice as a model to assess clinical signs, DNA presence, and serological responses.
  • Results showed that fresh goat milk can harbor viable tachyzoites, with higher risks associated with shorter refrigeration times and higher parasite loads, emphasizing the need for molecular testing to ensure safety in goat dairy products.
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  • Awake microsurgery is a way to treat brain aneurysms while the patient is awake, allowing doctors to monitor their brain activity during the surgery.
  • In a study analyzing 75 patients, the procedure had very few complications, with no permanent issues reported, and it was successful in repairing aneurysms in all cases.
  • More research is needed to confirm that this method is safer and better than current surgical options, but it shows promise for helping patients recover more easily.
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The progression of obesity involves several molecular mechanisms that are closely associated with the pathophysiological response of the disease. Endoplasmic reticulum (ER) stress is one such factor. Lipotoxicity disrupts endoplasmic reticulum homeostasis in the context of obesity.

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This study investigates a group of electrolytes containing NaPF or NaBF salts in phosphate- and ether-based solvents for high-mass loading sodium-ion batteries. It explores physicochemical properties such as ionic conductivity, dynamic viscosities, and nonflammability. The combination of experimental with computational studies reveals detailed insights into the physicochemical properties of the nonflammable liquid electrolytes.

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