Publications by authors named "Renata E F Macedo"

This study assessed the physicochemical parameters, water distribution, and metabolic profiles of wet- and dry-aged dark-cutting Nellore beef meat using TD-NMR and H NMR techniques alongside chemometric analysis. We analysed eight Nellore carcasses (Longissimus lumborum) aged for 28 days using both wet and dry methods. Post-aging, we noted significant reductions in water activity and moisture content in dry-aged samples, while lipid levels remained largely unchanged compared to unaged samples.

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This study aimed to assess consumer perceptions and the connections between consumers' health-related concerns and their perceptions of probiotic fermented sausage. The study was carried out using a 4-step online questionnaire composed of: (1) identification and recruitment; (2) application of the completion test; (3) attitudinal exploration; (4) socioeconomic inquiry. The online test was applied using images simulating the shopping experience of a couple in a supermarket.

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Consumer food preferences are constantly evolving, necessitating research to understand consumer intentions, habits, and attitudes. Dry aging was traditionally used for meat preservation and flavor enhancement. To assess current perceptions, an online questionnaire distributed via social media (snowball sampling) gathered data from 126 consumers.

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This study assessed the bioprotective effect of Carnobacterium maltaromaticum (CM) against Pseudomonas fluorescens (PF) and Brochothrix thermosphacta (BT) in ground beef and sliced cooked ham stored in high- and low-oxygen-modified atmospheres (66/4/30% O/N/CO and 70/30% N/CO respectively). Both meat products were inoculated with CM, PF, and BT individually or in combination and stored for 7 days (3 days at 4 °C + 4 days at 8 °C) for ground beef and 28 days (10 days at 4 °C + 18 days at 8 °C) for sliced cooked ham. Each food matrix was assigned to 6 treatments: NC (no bacterial inoculation, representing the indigenous bacteria of meat), CM, BT, PF, CM + BT, and CM + PF.

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This study aimed to assess the potential use of grains (amaranth, millet, and quinoa) as immobilizing matrices on the metabolic activity of and evaluate the viability of the probiotic immobilized in millet during simulated oro-gastrointestinal digestion (OGI) and storage. Firstly, different grains, sterilization and immobilization times were assessed. Secondly, was immobilized in millet and its viability and metabolic activity were assessed during non-refrigerated long-term storage and OGI.

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The aim of this study was to evaluate the effects of eugenol, benzocaine, and ice water during the sedative, anesthetic or euthanasia processes on the welfare of adult grass carp (Ctenopharyngodon idella). The experimental design was randomized and the animals were divided into eight groups. Sixty-two animals underwent an acclimation period.

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Resistant Enterobacterales of avian intestinal origin can contaminate carcasses during broiler processing and thereby spread through the human food chain. This study aimed at assessing the prevalence, diversity and genomic characteristics of ESBL/AmpC Enterobacterales in poultry flocks from different farms and cities in the state of Paraná, Brazil. Enterobacterales isolated from cloacal samples were subjected to antimicrobial susceptibility testing (AST).

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It is well-known that some bacteria can promote human and animal health. Bacteria of the genus , while underexplored, have demonstrated significant probiotic and bioprotective potential. In this review, the recent scientific advances in this area are discussed.

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Tannins can modulate rumen fermentation and increase the bypass protein; however, the use of different doses and sources of condensed tannins (CT) in animal diets has divergent results. The aim of this study was to evaluate the effect of different levels of dietary quebracho extract inclusion, as a CT source, in the performance and carcass characteristics of growing lambs. Forty-eight weaned lambs (Texel, Suffolk, and Hampshire Down crossbred) were homogenously blocked into four groups and supplemented at 0, 10, 30, and 60 g tannins/kg dry matter intake (DMI) (CONT, T1%, T3%, and T6%, respectively).

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Objective: This study was conducted to investigate the effect of associating calcium butyrate with tannin extract, compared to an antimicrobial on the growth performance, incidence of diarrhea, intestinal histology, immune-expression of cyclooxygenase-2 (COX-2) and tumor necrosis factor α (TNF-α) in piglets.

Methods: Seventy-two piglets (36 barrows and 36 gilts) weaned at 28±2 d and initial body weight of 7.17±1.

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Meat and meat products are important nutritional sources for humans; however, they are highly susceptible to pathogenic or spoilage bacteria, which leads to economic losses for the industry and has become a public health threat. Several biological methods have been developed to promote meat safety and to increase shelf life, mostly focusing on lactic acid bacteria from the genera and . However, little attention has been paid to other groups of microorganisms with potential use as bioprotective cultures.

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The bioprotective effects of Carnobacterium maltaromaticum (CM) strains were assessed in vitro and in sliced cooked ham. CM strains were tested in vitro against Listeria monocytogenes (LM), Escherichia coli O157:H7 (EC) and Salmonella Typhimurium (ST). In vitro effect was evaluated using co-culture (with and without EDTA) and cell-free supernatant (CFS).

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This study evaluated the antimicrobial effect of essential oils (EO) and organic acids (OA) against Salmonella Enteritidis in chicken feed and during an in vitro model that mimics the chicken digestive process. The minimal inhibitory concentration (MIC) of allyl isothiocyanate (AITC), carvacrol (CV), propionic acid (PROP) and caproic acid (CAP) were individually determined. Then, based on the MICs of each compound, combinations of EOs and/or OAs were tested to evaluate their synergic antimicrobial effect.

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The effects of natural antimicrobial compounds (garlic essential oil [GO], allyl isothiocyanate [AITC], and nisin Z [NI]) on microbiological, physicochemical and sensory characteristics of fresh sausage were assessed. The minimum inhibitory concentrations (MICs) and the minimum bactericidal concentrations (MBCs) towards Escherichia coli O157:H7 and Lactobacillus plantarum were determined in vitro. Sausages inoculated with E.

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Article Synopsis
  • Escherichia coli O157:H7 is a dangerous foodborne pathogen causing severe illnesses, which raises public health concerns.
  • The study explored the effectiveness of combining essential oil compounds (EOCs) with phenolic acids (PAs) to inhibit this pathogen in dry-fermented sausages.
  • Results indicated significant reductions in E. coli levels using the combination of allyl isothiocyanate (AITC) and o-coumaric acid, although sensory analysis showed that these treatments scored lower in taste and texture compared to the control, yet none were rated negatively.
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