749 results match your criteria: "Federal University of Santa Maria (UFSM)[Affiliation]"

TOXICITY ASSESSMENT OF EFFLUENT FROM A POTATO-PROCESSING INDUSTRY IN Cyprinus carpio.

Environ Toxicol Pharmacol

December 2024

Environmental Engineering Laboratory, Department of Sanitary and Environmental Engineering, Federal University of Santa Maria (UFSM), Avenida Roraima, 1000, Santa Maria, RS, 97015-900, Brazil.

Potato (Solanum tuberosum) cultivation faces the challenge of excessive pesticide use. During processing, the disposal of large volumes of contaminated water into water bodies can result in severe environmental damage, such as fish deaths. This study aimed to evaluate the toxicological effects of chemical compounds present in the effluent from a potato-processing industry using the test organism Cyprinus carpio.

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This study evaluated the effect of grinding and finishing treatments (polishing or glaze) on the color stability, translucency and opalescence of a translucent zirconia (3Y-TZP) after immersion in red wine. Discs (Ø= 12 mm; thickness 0.8 mm) of 3Y-TZP (Zenostar T, Ivoclar AG) were randomly allocated (n= 8) according to the surface treatment factor: Ctrl - as-sintered; Gr - grinding with diamond bur #4219; Gr + Pol - grinding followed by polishing; Gr + Gl - grinding followed by glaze.

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The aim of this study is to assess the presence of MDP at various stages of the bonding procedure, enhance the adhesive and mechanical behavior of cemented zirconia ceramics. Fifty ceramic slices (15 × 15 × 2 mm) and 48 discs (Ø= 10 mm, 1 mm thickness) were prepared, sintered, air-abraded with aluminum oxide, and allocated considering: 1) microshear bond strength (µSBS) between ceramic slices and luting agent cylinders (height= 1 mm, Ø= 1.2 mm); 2) fatigue behavior, ceramic discs paired and bonded onto fiber-epoxy resin discs (Ø= 10 mm, 2.

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Article Synopsis
  • Aspergillus westerdijkiae, known as 'golden mould,' can grow on dry-cured meats and produce the harmful mycotoxin ochratoxin A, posing health risks to humans.
  • The study explored how different temperatures (15, 20, and 25 °C) and water activity levels (0.85 to 0.99) affect the growth and ochratoxin production of two A. westerdijkiae strains over 28 days.
  • Optimal growth occurred at 20-25 °C and high water activity, while strain S1 produced the most ochratoxin A at certain conditions, indicating that even under ideal growth, mycotoxin production can be significant, highlighting the need for better
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Article Synopsis
  • * The study involved 34 women receiving ten weeks of individualized therapy that included perineal massage, vaginal dilation, and pelvic floor exercises, with evaluations before and after treatment.
  • * Results showed significant improvements in vaginal length, diameter, muscle strength, and quality of life metrics, with about 66.7% of participants experiencing resolution of vaginal stenosis post-intervention.
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The design and development of nanoparticle- and microparticle-based delivery systems incorporating carotenoids into carrier materials offers multiple advantages, including enhancing the bio-efficacy of these compounds due to improving their bioaccessibility and bioavailability. This study introduced pitanga saponified carotenoid extract (PSCE) and pitanga non-saponified carotenoid extract (PSCE) in a 12 % zein/1 %PEO solution and electrospun for fiber production. Then, the fibers were characterized, and their bioaccessibility and bioavailability were also evaluated.

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A paradigm shift in the understanding of bidirectional interactions between peripheral and central nervous systems is essential for development of rehabilitation and preventive interventions based on physical exercise. Although a causal relationship has not been completely established, modulation of voltage-dependent ion channels (Ca, Cl, K, Na, lactate-, H) in skeletal and neuronal cells provides opportunities to maintain force production during exercise and reduce the risk of disease. However, there are caveats to consider when interpreting the effects of physical exercise on this bidirectional axis, since exercise protocol details (e.

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Herein, we introduce an unprecedented cascade reaction for the assembly of pyrrole-fused 1,5-benzodiazepine frameworks. These diverse privileged scaffolds were controllably constructed by intramolecular cyclization of β-enamino diketone, followed by annulation with -phenylenediamine. The protocol features efficient one-pot cascade cyclization/annulation, performed under simple and mild reaction conditions.

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The purpose of this study was to investigate the influence of the color of positioning guides on the CIEL*a*b* color coordinates of ceramic, resin composite and bovine tooth surfaces measured by a clinical spectrophotometer. Positioning guides (n=10) in different colors (translucent, purple, yellow, green and, blue) were made for each surface (ceramic, resin composite and bovine tooth). The CIEL*a*b* color coordinates were measured with the positioning guides and with no positioning guide (control group).

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This paper presents a dual-purpose LED driver system that functions as both a lighting source and a Visible Light Communication (VLC) transmitter integrated with a Powerline Communication (PLC) network under the PRIME G3 standard. The system decodes PLC messages from the powerline grid and transmits the information via LED light to an optical receiver under a binary phase shift keying (BPSK) modulation. The load design targets a light flux of 800 lumens, suitable for LED light bulb applications up to 10 watts, ensuring practicality and energy efficiency.

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Multienzyme Immobilization on PVDF Membrane via One-Step Mussel-Inspired Method: Enhancing Fouling Resistance and Self-Cleaning Efficiency.

Membranes (Basel)

September 2024

Department of Food and Chemical Engineering, Universidade Regional Integrada do Alto Uruguai e das Missões (URI), 1621 Sete de Setembro Av., Centro, Erechim 99709-910, Brazil.

Immobilizing different enzymes on membranes can result in biocatalytic active membranes with a self-cleaning capacity toward a complex mixture of foulants. The membrane modification can reduce fouling and enhance filtration performance. Protease, lipase, and amylase were immobilized on poly(vinylidene fluoride) (PVDF) microfiltration membranes using a polydopamine coating in a one-step method.

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In vitro spectroscopic analysis of the chemical interaction between calcium hypochlorite and chlorhexidine.

Odontology

October 2024

Post-Graduate Program in Oral Science, Faculty of Dentistry, Federal University of Santa Maria (UFSM), Roraima Avenue #1000, T Street, Building 26F, Room 2383, Santa Maria, Rio Grande do Sul, 97.105-900, Brazil.

This study aimed to identify the chemical composition resulting from the chemical interaction between calcium hypochlorite [Ca(OCl)] and chlorhexidine (CHX) using different H and C nuclear magnetic resonance spectrometry (NMR), correlated two-dimensional spectroscopy (2D COSY), heteronuclear single quantum coherence (HSQC), and Fourier Transform Infrared Spectroscopy (FTIR) experiments. The 5.25% Ca(OCl) was mixed with 2% CHX in a 1:1 ratio, obtaining an orange-brown precipitate that was filtered, washed in ultrapure water, dried and characterized by H and C NMR, 2D COSY, HSQC and FTIR.

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This editorial outlines the outcome of an interdisciplinary session on collective sense-making through dance improvisation, which took place during the 'Neural and Social Bases of Creative Movement' workshop. We argue that joint improvisation practices place the scientist in a privileged position to reveal the nature of cognitive and creative behaviors.

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Objective: The study aimed to develop and validate a conversational agent (chatbot) designed to support Food and Nutrition Surveillance (FNS) practices in primary health care settings.

Methods: This mixed-methods research was conducted in three stages. Initially, the study identified barriers and challenges in FNS practices through a literature review and feedback from 655 health professionals and FNS experts across Brazil.

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This study aimed to verify whether the combined application of jabuticaba and strawberry extracts at five different concentrations could enhance oxidative stability and microbiological quality of pork burgers over 12 days of storage at 4 °C. The anthocyanins in these extracts were quantified by HPLC-DAD and identified by LC-MS/MS. Pelargonidin-3-glucoside was highlighted as the predominant anthocyanin in jabuticaba extract, while cyanidin-3-glucoside was the main constituent in strawberry extract.

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The Persistence of Hydrogen Bonds in Pyrimidinones: From Solution to Crystal.

ACS Org Inorg Au

October 2024

Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, Rio Grande do Sul, Brazil.

Pyrimidinone scaffolds are present in a wide array of molecules with synthetic and pharmacological utility. The inherent properties of these compounds may be attributed to intermolecular interactions analogous to the interactions that molecules tend to establish with active sites. Pyrimidinones and their fused derivatives have garnered significant interest due to their structural features, which resemble nitrogenous bases, the foundational building blocks of DNA and RNA.

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Background: A variety of firing protocols are available for the IPS e.max lithium disilicate (LD) and can be used for new, 'advanced' LD (ALD). However, the impact of firing protocols on the optical properties of ALD is still unknown.

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Exploring fiberglass post numbers for enhanced fatigue resistance in molars without coronary remnants.

Braz Dent J

September 2024

Post-Graduate Program in Oral Sciences, Center for Development of Advanced Materials, Division of Prosthodontics-Biomaterials, Federal University of Santa Maria(UFSM), Santa Maria, RS, Brazil.

This study aimed to assess the fatigue resistance of molars lacking a coronary remnant, using zero, one, two, or three fiberglass posts. Forty caries/crack-free human molars with coronal portions removed at the pulp chamber floor were randomly allocated into four groups (n=10). Following endodontic treatment, posts (Whitepost DC/DC.

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Masking discolored substrates with resin composites: effect of layering strategies.

Braz Dent J

September 2024

Post-Graduate Program in Oral Sciences (Prosthodontics Units), Faculty of Dentistry, Federal University of Santa Maria(UFSM), Santa Maria, RS, Brazil.

This study aimed to evaluate the masking ability of different resin composite (RC) layering techniques over discolored substrates. Layering strategies were tested (n=10), using different RCs: flowable opaque, white dentin, A1 dentin, A1 body, and A1 enamel (Filtek Z350XT; 3M ESPE). Bilayer and trilayer RC combinations resulted in final thicknesses of 1 mm, 1.

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Enhancing sludge thickening in continuous treatment using polymeric bubbles with cationic polymer P2900 and cocamidopropyl betaine.

Environ Sci Pollut Res Int

October 2024

Department of Sanitation and Environmental Engineering, Federal University of Santa Maria (UFSM), Av. Roraima 1000, CT Lab, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil.

Article Synopsis
  • Sludge thickening is a vital process in wastewater treatment, and this study focused on using a combination of cationic polymer P2900 and cocamidopropyl betaine (CAPB) to enhance effectiveness.
  • The use of these polymeric bubbles allowed for a significant increase in total solid concentrations, reaching 45% compared to just 25% with traditional methods, under specific operating conditions.
  • The mechanism involves the adhesion of P2900 to CAPB at the air/water interface, leading to the formation of a surfactant film on bubble surfaces, while also capturing residual aluminum from the sludge for improved thickening efficiency.
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: Limited research has been performed to assess the strength of resin-bonded 3D-printed restorations. Based on that, this study investigates the impact of different manufacturing methods on the fracture load of indirect composite restorations (ICRs) following an aging process. : Three manufacturing techniques-conventional (CRC), milled (MRC), and printed (PRC)-were evaluated using 60 specimens, each with a diameter of 10 mm and a thickness of 1.

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Objective: The aim of this study was to assess the effect of opaque stain application to the intaglio surface of lithium disilicate glass ceramics on the masking ability of discolored substrates and bond strength to a resin-based luting agent (depending on etching time); the stain film-thickness was also assessed.

Materials And Methods: Ceramic specimens were produced with CAD-CAM blocks of lithium disilicate (IPS e.max CAD).

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Biomechanical validation of a tibial critical-size defect model in minipigs.

Clin Biomech (Bristol)

December 2024

Department of Orthopedics and Trauma Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University, Moorenstr. 5, 40225 Düsseldorf, Germany. Electronic address:

Article Synopsis
  • Autologous cancellous bone grafting is the standard treatment for non-healing bone defects, but issues like donor site complications and limited availability have led researchers to explore alternatives.
  • A study on minipig tibiae assessed the biomechanical properties of critical-size defects through fatigue and load-to-failure tests, with CT scans utilized for damage evaluation.
  • Results showed that intact tibiae withstand significantly higher compressive forces than those with defects, indicating the minipig model's effectiveness for testing bone substitute materials.
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Phosphate fertilizers are applied to the soil surface, especially in vineyards in production in subtropical regions. Nowadays, phosphorus (P) is not incorporated into the soil to avoid mechanical damage to the root system in orchards. However, over the years, successive surface P applications can increase the P content only in the topsoil, maintaining low P levels in the subsurface, which can reduce its use by grapevines.

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The objective of this work was to determine whether the addition of phytogenic compounds based on essential oils (carvacrol, eugenol, cinnamaldehyde) and resinous pepper oil (capsaicin) to the diet of Jersey cows at the beginning of lactation affects anti-inflammatory, antioxidant and immunomodulatory responses, as well as whether there are effects of EO on blood metabolites, ruminal fermentation, digestibility and milk production and composition. Six primiparous cows (370.00 ± 17 kg body weight (BW); 13.

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