Georgeta Stefan

Dr. Georgeta Stefan

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Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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4 October 2024 in Agriculture
Verified
Journal Article
Open access
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Nicoleta Corina PredescuNicoleta Corina Predescu
Nicoleta Corina Predescu
GSGeorgeta Stefan
Georgeta Stefan
RMRosu Petronela Mihaela
Rosu Petronela Mihaela
CPCamelia Papuc
Camelia Papuc
The aim of this review is to highlight the most beneficial effects of dietary fermented feed in correlation with decreasing the antinutrient concentration in vegetal matrices usually used for broiler nutrition. Rational feed formulation is critical for animals because it improves animal performance, and provides the animal with the necessary nutrients to develop strong bones, muscles and tissues, and a properly functioning immune system. Fermentation of animal feed is useful as compounds with high molecular mass are converted into energy and compounds with lower molecular mass in the presence of enzymes produced mainly by bacteria and yeasts. Fermentation products contain probiotic compounds with beneficial effects on the health of the animal microbiome. Feed fermentation has other roles such as converting antinutrients into beneficial substances for animal organisms, and some studies have shown that fermentation of feed decreases the risk of antinutrient components presence. For the bibliographic research, different platforms were used (PubMed, Science Direct, MDPI resources), and numerous words or combinations of terms were used to find the latest information. Fermented feed utilization has been shown to enhance growth performance while promoting a healthier gut microbiome in animals.

22 September 2025 in Foods
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Journal Article
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Cristina TodascaCristina Todasca
Cristina Todasca
CPCatalina-Beatrice Poteras
Catalina-Beatrice Poteras
I-Iordache Teodora Teodora -Alexandra
Iordache Teodora Teodora -Alexandra
MTMihaela Tociu
Mihaela Tociu
STStefan Theodor Tomas
Stefan Theodor Tomas
MAManolache Fulvia Ancuta
Manolache Fulvia Ancuta
Plum vinegar represents a functional food product valued for its potential health benefits, largely attributed to its polyphenolic content. This study investigates the quality parameters of vinegars produced from five Romanian plum varieties (Centenar, Agent, Andreea, Anna Spath and Romanian Vanata), focusing on their physicochemical and phenolic profiles. Analyses included pH, total acidity, colorimetric evaluation, total polyphenolic content (TPC), antioxidant activity, and ATR-FTIR and 1H-NMR spectroscopy. The vinegars exhibited pH values ranging from 3.2 to 3.7 and TPC values between 250 and 350 mg GAE/L during fermentation, with higher concentrations (up to 400 mg GAE/L) recorded post-aging. These findings support the potential of Romanian plum varieties as valuable raw materials for producing high-quality, polyphenol-rich fruit vinegars.

26 April 2025 in Foods
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Journal Article
Open access
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GSGeorgeta Stefan
Georgeta Stefan
GGGheorghe Valentin Goran
Gheorghe Valentin Goran
Nicoleta Corina PredescuNicoleta Corina Predescu
Nicoleta Corina Predescu
MGMaria Rodica Gurau
Maria Rodica Gurau
SBStelian Baraitareanu
Stelian Baraitareanu
The behavior of Listeria monocytogenes (L. monocytogenes) throughout the shelf life of ready-to-eat foodstuffs represents a major concern in relation to human diet and human health. The aim of the study was to evaluate the behavior of L. monocytogenes in Wiener sausage, as an RTE meat product, throughout 15 days of storage (0–7 °C) under the action of fermented juice from parsley (Petroselinum crispum var. tuberosum) roots and common hawthorn (Crataegus monogyna) berry phenolics, compared with the effect of the food additives sodium nitrite and sodium ascorbate used in the standard formulation. For this purpose, one experimental formulation (F1) and one standard formulation (F2) of Wiener sausages were designed using the following preservatives and antioxidants: 50 ppm fermented parsley root juice (as a nitrite source) and 50 ppm hawthorn berry phenolics were used in F1, and 50 ppm sodium nitrite (as food additive E 250) and 50 ppm sodium ascorbate (as food additive E 301) were used in F2. The ability to support L. monocytogenes growth was assessed by a challenge test throughout the 15 days of storage. Based on the results of the assessment, the natural ingredients fermented parsley root juice and hawthorn berry phenolics could act as preservatives that ensure microbiological safety during the shelf life of the product. The nitrite and phenolic compounds of these natural ingredients showed antimicrobial activity against foodborne pathogens, including L. monocytogenes.

18 February 2026 in Bioengineering
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Journal Article
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DTDiana-Lidia Tache-Codreanu
Diana-Lidia Tache-Codreanu
IRIoana Angela Rotaru
Ioana Angela Rotaru
MBMihai-Andrei Butum-Cristea
Mihai-Andrei Butum-Cristea
GSGeorgeta Stefan
Georgeta Stefan
ATAndrei Tache-Codreanu
Andrei Tache-Codreanu
ATAna-Maria Tache-Codreanu
Ana-Maria Tache-Codreanu
Background: Functional Electrical Stimulation (FES) for post-stroke drop foot is commonly applied in acute and subacute stroke rehabilitation or as part of long-term home-based programs in chronic patients. Evidence supporting short facility-based rehabilitation programs incorporating FES in chronic populations remains limited. The aim of this study was to explore functional outcomes associated with such a program in a chronic population. Materials and methods: A 10-day facility-based rehabilitation program incorporating FES therapy followed by 3-month follow-up was delivered to 14 chronic post-stroke patients with foot drop (8 women; aged 62.6 ± 12.2 years). FES was applied during walking with stimulation synchronized to the swing phase of gait (35 Hz, 300 μs, 15 min per session). Activities of daily living and mobility were assessed using clinical outcome measures. Statistical significance (p < 0.05), effect sizes, and minimal clinically important difference (MCID) responder rates were evaluated. Results: Statistically significant improvements were observed across all outcome measures post-treatment and at follow-up, with MCID responder rates exceeding 50%. Conclusions: A short facility-based multimodal rehabilitation program incorporating FES was associated with functional improvements in chronic post-stroke patients. Given the multimodal design, these findings cannot be attributed to FES alone and should be interpreted as exploratory.

28 May 2025 in Antibiotics
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Journal Article
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CPCorina Pascu
Corina Pascu
VIOREL HERMANVIOREL HERMAN
VIOREL HERMAN
Luminita CostinarLuminita Costinar
Luminita Costinar
Corina BadeaCorina Badea
Corina Badea
RGRadu Valentin GROS
Radu Valentin GROS
GSGeorgeta Stefan
Georgeta Stefan
Background: Respiratory diseases are among the main causes of morbidity and mortality in captive reptiles. In Romania, pneumonia is a frequently observed illness affecting pet reptiles. Key factors contributing to the high incidence of pneumonia include inadequate animal husbandry, poor nutrition, and insufficient hygiene practices. Bacteria may act as primary pathogens or as facilitators of disease severity. Methods: This study investigates bacterial strains from multiple genera and species (Chryseobacterium (C.) indologenes, Staphylococcus (S.) epidermidis, Escherichia (E.) coli, and Pseudomonas (P.) aeruginoasa) from six ball pythons regarding their antibiotic susceptibility and the effect of essential oils. Bacteria were isolated from the lower respiratory tract, displaying clinical signs of pneumonia. All isolates were tested with essential oils (lemongrass, oregano, rosemary, and sage) and a grapefruit seed extract (GSE) at different dilutions. Results: The incidence of Chryseobacterium indologenes was highest (3 isolates/12 samples, 25%), followed by E. coli and Staphylococcus epidermidis (2/12 each, 16.6%), and Pseudomonas aeruginoasa (1/12, 8.3%). Resistance profiling to different antibiotic classes revealed that all isolates (eight) were resistant to multiple antibiotics tested by us. All isolates were resistant to β-lactams and fluoroquinolones. One strain of E. coli exhibited intermediate resistance to quinolone and penicillin. All strains were categorized as multidrug-resistant. GSE showed antibacterial activity against all isolates. Conclusions: Wanting to deepen our understanding of the microorganisms that can infect ball pythons and recognizing that all isolated bacteria have zoonotic potential, this paper highlights some common issues faced by exotic animal owners and suggests that treatments should also include the use of essential oils.

13 November 2024 in Scientific Papers Journal VETERINARY SERIES
Verified
Journal Article
Closed access
GSGeorgeta Stefan
Georgeta Stefan
Nicoleta Corina PredescuNicoleta Corina Predescu
Nicoleta Corina Predescu
ADAlina Karina Drăghici
Alina Karina Drăghici
OGOana Mărgărita Ghimpețeanu
Oana Mărgărita Ghimpețeanu
Listeriosis, infection produced by Listeria monocytogenes (Lmo), is a foodborne zoonosis that affects humans, especially some risk categories, such as the pregnant women, neonates, immunocompromised patients, elderly. Humus salad, as ready-to-eat products (RTE), presents a risk of contamination with Lmo, especially through the processing environment, considering the increased resistance of this bacteria. The Lmo growth risk throughout shelf life of RTE products represents a food safety issue. Commission Regulation (EC) no. 2073/2005, on microbiological criteria for foodstuffs, sets out specific food safety criteria for LMO in ready-to-eat foods in Annex I for categories 1.1 to 1.3. The obtained results showed that the growth of Listeria monocytogenes is not possible throughout shelf life of humus salad, since the highest growth potential (δ) among three batches is 0.5