Violeta Alexandra Ion

@usamv.ro

Research Center for Studies of Food Quality and Agricultural Products
University of Agronomic Sciences and Veterinary Medicine (USAMV)



              

https://researchid.co/violeta.ion
33

Scopus Publications

Scopus Publications

  • Socio-Demographic Correlates of Basic Food Needs: A Maslow’s Hierarchy Analysis
    Nicoleta Defta, Andreea Barbu, Violeta Alexandra Ion, Livia Vidu, Elena Peț, Liviu-Cristian Cune, and Liliana Aurelia Bădulescu

    MDPI AG
    Nutrition is a fundamental aspect of consumer behavior, closely linked to the satisfaction of basic household needs and strategies for purchasing food products. This study aimed to examine how fundamental food needs—specifically survival (daily food) and food security (food stocks)—shape purchasing behaviors, enabling the identification of vulnerable consumer segments and the delineation of patterns useful for producers and retailers. Data were collected through a cross-sectional survey (N = 1060) and analyzed using the Rao & Scott-adjusted Pearson chi-square test (R, version 4.4.3), considering key socio-demographic factors including gender, age, educational level, marital status, residence, and income. Results indicate that gender, age, and education significantly influence food purchases driven by the need for food security, whereas marital status is a significant factor only for survival-related purchases. Differences observed in other contexts were not statistically significant. Additionally, two multinomial logistic regression models were developed to predict consumer food purchases driven by fundamental needs, demonstrating high explanatory power. Each socio-demographic factor emerged as a significant predictor for at least one response category on the Likert scale, and the relative influence of each predictor was quantified. These models provide actionable insights for marketing strategies, including the identification of optimal store locations and the adjustment, diversification, or optimization of product ranges based on the characteristics of specific consumer segments and geographic areas.

  • Identification of the main bioactive compounds in sideritis genotypes Genebanked at BRGV Buzau
    G. Negoșanu, C. Vînătoru, V.A. Ion, B. Mușat, M. Popescu, and A. Asănică

    International Society for Horticultural Science (ISHS)

  • Application of Marine-derived Materials as Biofertilizers in Organic Farming
    Anne-Kristin Løes, Joshua Cabell, Sara Hansdotter, Violeta Alexandra Ion, Ingrid Olesen, and Tatiana Rittl

    CABI

  • Exploring the Relationship Between Socio-Demographic Factors and Consumers’ Perception of Food Promotions in Romania
    Nicoleta Defta, Andreea Barbu, Violeta Alexandra Ion, Elena Narcisa Pogurschi, Aurelia Osman, Liviu-Cristian Cune, and Liliana Aurelia Bădulescu

    MDPI AG
    In the context of economic crises and inflationary pressures, consumers often rely on discounted food products to manage their monthly budgets. This study aims to explore how socio-demographic factors are associated with Romanian consumers’ perception of food promotions. Data were collected from 1060 respondents, and the analysis was conducted using R version 4.4.2, applying both descriptive and inferential statistical methods, including Pearson’s chi-square test and multinomial logistic regression. The Pearson’s chi-square test revealed significant differences in consumer responses based on all socio-demographic factors examined, except for residence. Males, married individuals, those with higher education, and higher net incomes were generally more cautious about promotions, while younger consumers (aged 18–24) showed greater receptiveness. The multinomial logistic regression further identified significant predictors and estimated their impact on consumers’ perception of food promotions. We found that gender, marital status, education level, and age were strong predictors, while income had only a quadratic impact, and residence showed no statistically significant outcome. These findings offer valuable insights for shaping marketing strategies and highlight the role of socio-demographic factors in shaping consumer perceptions toward food promotions.

  • VINE RESIDUE-DERIVED ENGINEERED BIOCHAR FOR ENVIRONMENTAL BENEFITS


  • Detection of Ochratoxin A in Maize and Its Potential Impact on Avian Pathology in Romanian Farms
    Silviu-Ionut Beia, Violeta Alexandra Ion, Elvira Gagniuc, Oana-Crina Bujor, Elena Ştefania Ivan, Andreea Barbu, Elena Pitoiu, Violeta Elena Beia, and Liliana Bădulescu

    MDPI AG
    Ochratoxin A (OTA) is a nephrotoxic mycotoxin that commonly contaminates maize, posing significant health risks to both poultry and humans. In this study, a rapid and sensitive method utilizing ultra-performance liquid chromatography coupled with fluorescence detection (UPLC-FLD) was developed for the quantification of OTA levels in maize. The method utilizes immunoaffinity column purification for improved specificity. Accuracy and precision were validated in line with European Union Reference Laboratory (EURL-MP) guidelines, meeting regulatory standards for linearity, trueness, detection and quantification limits, precision, and uncertainty, as per European Commission Regulation (EC) No. 401/2006 and its amendments. The method demonstrated an average recovery rate of 116.78% for maize, with RSDwR values (within-laboratory reproducibility) of 12.72%. Furthermore, OTA occurrence and its possible effects were investigated in several farms in South Romania, where necropsy and histopathological analyses of poultry revealed severe kidney damage, including renal tubular degeneration.

  • Preparation, Characterization, and Testing of Compost Tea Derived from Seaweed and Fish Residues
    Andrei Moț, Oana Cristina Pârvulescu, Violeta Alexandra Ion, Ailin Moloșag, Aurora Dobrin, Liliana Bădulescu, Cristina Orbeci, Diana Egri, Tănase Dobre, Anne-Kristin Løes,et al.

    MDPI AG
    Non-aerated compost tea (CT) was prepared from compost derived from rockweed (Ascophyllum nodosum) and fish (cod, common ling, haddock, saithe) residues that fermented in water. Electrical conductivity, pH, concentrations of dry matter, ash, C, macronutrients (N, P, K, Ca, and Mg), and micronutrients (Cu, Fe, Mn, Mo, and Zn) of CT prepared under different fermentation conditions were measured. The effects of process factors, i.e., water/compost mass ratio (4.2–9.8 g/g) and fermentation time (4.2–9.8 days = 100–236 h), on the physicochemical properties of CT were quantified using quadratic polynomial models. CT obtained at optimal levels of process factors (4.2 g/g and 5.6 days = 134 h) was tested for lettuce seed germination and seedling growth. Diluted CT (25% CT + 75% ultrapure water) improved seedling growth while achieving a high germination percentage (97%).

  • Assessment of Aseptic and Non-Aseptic Systems’ Influence on Basil (Ocimum basilicum L.) Microplants
    Oana Livadariu, Carmen Gabriela Constantin, Oana-Alina Boiu-Sicuia, Aurora Dobrin, and Violeta Alexandra Ion

    MDPI AG
    Considering the current global climate and demographic conditions, combined with the growing demand for food diversification, the need for innovative functional foods that adhere to the principles of the circular economy is becoming clear. Therefore, this research aims to identify an appropriate cultivation system and growth substrate to maintain a high germination rate and produce basil aromatic microplants with superior quality traits that are entirely edible, together with the substrate. Microplants were grown in both aseptic (AS) and non-aseptic (NAS) systems. Both AS and NAS experiments were conducted in vitro using eco-innovative production technology. Moreover, various growth substrates were tested, such as perlite, agar, banana peel, peat, and their combinations. The analyses focused on the germination capacity, morphometric measurements, and biochemical analyses of the microplants. The results showed that the edible agar-based substrate, used in both AS and NAS, increased the germination capacity up to 95.00 ± 0.30%, while peat provided a germination capacity of only 12.07 ± 1.27% under AS conditions and 6.07 ± 0.35% under NAS conditions. Most biochemical analyses indicated that AS conditions are more suitable for basil microplant production, increasing the dry matter content, total phenolic content, total flavonoid content, and total antioxidant capacity compared to NAS conditions. These findings support the adoption of a new eco-innovative technology that provides organic basil microplants, which are fully usable along with the edible agar substrate.

  • Suitability of Residues from Seaweed and Fish Processing for Composting and as Fertilizer
    Joshua Cabell, Susanne Eich-Greatorex, Violeta Alexandra Ion, Tore Krogstad, Sevasti Matsia, Maria Perikli, Athanasios Salifoglou, and Anne-Kristin Løes

    MDPI AG
    There is a need to find novel sources of fertilizers to meet the increasing food demands of a growing human population and alternatives to mined and synthetic fertilizers for the certified organic sector. Composting is a common method for processing and stabilizing organic residues for use in horticulture. To that end, a small-scale composting experiment with six combinations of dried and ground rockweed (Ascophyllum nodosum), algae fiber from chemically processed rockweed, ground bones and fishmeal from cod (Gadus morhua), and ground blue mussels (Mytilus edulis) was conducted in Dewar flasks to assess whether these residues are suitable for composting and have potential for use as fertilizers. Expanded clay aggregates were used as a bulking material. Physicochemical analyses were performed on the residues and their mixtures before and after composting, and the temperature in the flasks was monitored for 92 days. Suitability was determined by evaluating the temperature dynamics, changes in physiochemical parameters, and nutrient profiles. All treatments generated heat, with reductions in C/N ratio, weight, and volume, demonstrating suitability for composting. The treatments with algae fiber had a higher mean temperature (34.5 vs. 29.0 °C) and more degree days above the thermophilic range (mean = 176- vs. 19-degree days), the greatest reduction in volume (mean = 35% vs. 27%), and the lowest C/N ratios at the end of active composting (18 vs. 24) compared to the treatments with dried and ground seaweed. In terms of fertilizer value, none of the finished composts were balanced for use as fertilizers alone and, in some cases, contained too much Na, but contained sufficient concentrations of K, S, Mg, and Ca and could be a valuable source of these nutrients and organic matter in combination with other N- and P-rich sources.

  • Development of Functional Foods: A Comparative Study on the Polyphenols and Anthocyanins Content in Chokeberry and Blueberry Pomace Extracts and Their Antitumor Properties
    Loredana Stanca, Liviu Bilteanu, Oana Crina Bujor, Violeta Alexandra Ion, Andrei Cătălin Petre, Liliana Bădulescu, Ovidiu Ionut Geicu, Aurelia Magdalena Pisoschi, Andreea Iren Serban, and Oana-Mărgărita Ghimpeteanu

    MDPI AG
    Developing of functional foods is a promising strategy to reduce the increasing burden of colorectal cancer worldwide. Fruit pomace, particularly polyphenol and anthocyanin-rich chokeberry and blueberry, is a valuable ingredient for functional foods and nutraceuticals. Our study aimed to evaluate the anti-inflammatory and antiproliferative effects of chokeberry and blueberry pomace extracts on C2BBe1 colorectal carcinoma cells and explore the underlying signaling pathways. We analyzed both pomace extracts for total polyphenols and anthocyanins using Folin-Ciocalteu method and ultra-performance liquid chromatography, while antioxidative activity was assessed via the 2,2-diphenyl-1-picrylhydrazyl radical scavenging method. We evaluated the in vitro anti-inflammatory and antiproliferative effects using trypan blue exclusion, MTT and LDH assays, and assessed protein levels of p-Erk1/2, Akt-1, STAT1, STAT3, occludin, oxidized proteins, and MDA-protein adducts through western blotting, as well as analysis of a 37-plex panel of inflammatory markers. Chokeberry extracts exhibited higher total polyphenol content, anthocyanin levels, and antioxidative activity compared to blueberry extracts, however, blueberry extracts effects on cell viability and proliferation in C2BBe1 cells were stronger. Both fruit pomaces induced non-inflammatory cell death characterized by membrane integrity loss, beneficial in cancer therapy. Our data suggests chokeberry’s cytotoxicity may be mediated by Erk signaling and Akt-1 inhibition, while blueberry uniquely decreased occludin levels. These berries pomaces’ potential to mitigate cancer risks and enhance treatment efficacy is promising, warranting further investigation for functional foods development.

  • Phenotypical and biochemical evaluation of the Sideritis scardica, hyssopifolia, syriaca and raeseri genotypes acclimated in Romania
    G. Negoșanu, C. Vînătoru, V. Ion, A. Dîcă, and A. Asănică

    International Society for Horticultural Science (ISHS)

  • The influence of postharvest technologies on 'Centenar' plum quality
    A. Stan, M. Butac, V.A. Ion, I. Bezdadea-Cătuneanu, M. Frîncu, and L. Bădulescu

    International Society for Horticultural Science (ISHS)


  • Comparative study of the chemical composition of some bean accessions
    B.E. Kivu, V.A. Ion, E. Barcanu, O.L. Agapie, I. Gherase, G. Dobre, A. Moț, and A. Asănică

    International Society for Horticultural Science (ISHS)

  • Variation in Nutritional Quality of By-Products from Nine Organic Apple Cultivars
    Elisabeta Elena Popa, Laurentiu Mihai Palade, Mona Elena Popa, Violeta Alexandra Ion, Andreea Barbu, Oana Crina Bujor, Vlad Ioan Popa, Paul Alexandru Popescu, Amalia Carmen Mitelut, Mihaela Cristina Draghici,et al.

    Faculty of Food Technology and Biotechnology - University of Zagreb
    Research background. Recently, consumers have been increasingly interested in highly nutritional and health-promoting products in the form of functional foods that are produced using environmentally friendly processes as part of the circular economy. Therefore, much research has been carried out related to the valorisation of waste generated during the processing of food, especially fruit and vegetables, commonly referred to as by-products. These by-products consist of peels, seeds, stems or pomace, which have been shown to have valuable nutritional properties (high content of polyphenols, vitamins, antioxidants, etc.). Experimental approach. Considering these aspects, the aim of this study is to characterise three types of by-products of apple processing, namely peel, pulp pomace and whole fruit pomace, from a nutritional point of view. The total content of polyphenols, antioxidant activity, ascorbic acid (vitamin C) and phenolic content were determined in nine apple varieties from two harvest years (2020 and 2021) during 9 months of storage. Results and conclusions. The results showed that apple peel had good nutritional properties, in contrast to the pulp or the whole fruit, which are often removed during apple processing. Therefore, the analysed by-products are suitable candidates for application in the food industry for the development of new products enriched with bioactive compounds. Novelty and scientific contribution. In this study, nine varieties of organic apples were analysed and the nutritional parameters were determined. The phenolic compounds of the studied apple by-products were analysed for possible reuse of apple processing waste.

  • Preliminary research on getting sprouts in Ocimum basilicum L. on different substrates
    O. Livadariu, N.-E. Băbeanu, A.G. Peticilă, V. Lagunovschi-Luchian, O.-A. Boiu-Sicuia, M.L. Badea, C.G. Constantin, A. Dobrin, V.A. Ion, O.A.C. Venat,et al.

    International Society for Horticultural Science (ISHS)

  • PREPARATION AND CHARACTERIZATION OF COMPOST TEA DERIVED FROM ROCKWEED RESIDUES


  • Organic Vegetable Chips: Exploring Romanian Consumers’ Preferences in Relation to Socio-Demographic Factors
    Andreea Barbu, Violeta Alexandra Ion, Mihai Frîncu, Nicoleta Defta, Viorica Lagunovschi-Luchian, and Liliana Aurelia Bădulescu

    MDPI AG
    In recent years, people have become increasingly interested in adopting a healthy diet, which also extends to healthy snacks, such as chips. Understanding the interplay of factors that influence the preference decisions concerning food products is very helpful in market segmentation for identifying specific groups of consumers with similar needs. This study aims to obtain a better understanding of Romanian consumers’ preference for organic vegetable chips vs. classic potato chips. The research involved a transversal, cross-sectional, descriptive, exploratory, and correlational design. Data were collected based on a questionnaire (1060 participants) and processed with the SPSS 22 program, using the Pearson chi-square test and binary logistic regression as statistical procedures. Significant differences were found regarding the distribution of the respondents who prefer organic vegetable chips vs. classic potato chips based on socio-demographic characteristics. The results of the binary logistic regression analysis (χ2 = 102,906, df = 22, N = 909, p < 0.001) indicate that education level and frequency of consumption have a statistically significant impact on the preference for organic vegetable chips. The obtained results can contribute to a better understanding of Romanian consumers’ preferences, acting as a knowledge stage in the adoption of a healthy eating style.

  • Chemical and Biological Profiling of Fish and Seaweed Residues to Be Applied for Plant Fertilization
    Marios Maroulis, Sevasti Matsia, Georgios Lazopoulos, Oana Cristina Pârvulescu, Violeta Alexandra Ion, Oana-Crina Bujor, Joshua Cabell, Anne-Kristin Løes, and Athanasios Salifoglou

    MDPI AG
    Brown algae and fish waste contain high-value compounds with potentially beneficial effects on plant growth. Several commercial fertilizer products are currently available, but the characteristics of the materials are usually not well-described. Fish and seaweed residues originating from the Norwegian coast are available, after industrial processing, which may be combined into complete fertilizers exerting additional effects on crop plants (biostimulants). In this study, raw samples of fish and seaweed residues were investigated using ecofriendly technologies (drying, leaching), targeting search and isolation of potential biostimulants, followed by physicochemical characterization (elemental analysis, UV–visible, FT-IR, ICP-MS, ICP-OES, electrical conductivity, pH, etc.). Organic solvent extractions were employed to determine the available mineral content, micro- and macro-nutrients, antioxidant compounds, and amino acid content by chemical hydrolysis. The in vitro biotoxicity profile (cell viability, morphology, migration) of the generated extracts was also perused, employing Gram-positive (Staphylococcus aureus) and Gram-negative bacteria (Escherichia coli) along with sensitive neuronal eukaryotic cell lines N2a58 and SH-SY5Y, to assess their time- and concentration-dependent efficacy as antimicrobials and agents counteracting oxidative stress. The analytical composition of all raw materials showed that they contain important nutrients (K, P, Ca, N) as well as organic compounds and amino acids (Gly, Asp, Glu, Leu, Phe) capable of acting as plant biostimulants. Concurrently, the inherently high conductivity values and salt content necessitated leaching processes, which result in Na+ and K+ decreasing by more than ~60% and justifying further their use in soil treatment formulations. The aforementioned results and assertions, combined with physical measurements (pH, electrical conductivity, etc.) on naturally occurring and dried samples as well as green solvent extracts, formulated a physicochemical profile reflecting well-defined inorganic–organic species that might function as biostimulants. The collective physicochemical and biological properties support the notion that appropriate mixtures of marine organism residues may be efficient fertilizers for crop plants and concurrently possess biostimulant characteristics.

  • Effects of Marine Residue-Derived Fertilizers on Strawberry Growth, Nutrient Content, Fruit Yield and Quality
    Ailin Moloșag, Oana Cristina Pârvulescu, Violeta Alexandra Ion, Adrian Constantin Asănică, Raluca Soane, Andrei Moț, Aurora Dobrin, Mihai Frîncu, Anne-Kristin Løes, Joshua Cabell,et al.

    MDPI AG
    An outdoor experiment was performed for six months to evaluate the effects of organic fertilizers obtained from marine residual materials on strawberry plants. Three types of organic fertilizers were used, i.e., cod (Gadus morhua) bone powder, common ling (Molva molva) bone powder, and pellets obtained by mixing small cod bone powder and rockweed (Ascophyllum nodosum) residues. A tabletop system for strawberry cultivation was designed, in which two bare-root strawberry plants of cultivar ‘Albion’ were planted in a peat substrate in each pot. Five treatments were applied, i.e., cod bone powder (F1), common ling bone powder (F2), small cod bone powder and rockweed residue pellets (FA), chemical fertilizer (E), and a control (C). The number of leaves and their nutrient content, fruit yield and quality characteristics of the strawberries grown using the organic fertilizers were similar or better than those corresponding to treatments E and C. Organic fertilizers derived from the residues of fish and macroalgae could be a promising alternative to chemical fertilizers in strawberry production.

  • Investigations on the chemical composition of volatile oils extracted from the leaves of spontaneous and cultivated Taxus baccata L. trees
    Mădălina-Elena FRUNZETE, Tatiana RODIDEAL, Marius-Nicușor GRIGORE, Violeta A. ION, Liliana BĂDULESCU, Ramona M. CIOCAN, and Maria-Magdalena ZAMFIRACHE

    University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca
    Taxus L. is accepted in the literature as natural resources of biologically active compounds and volatile oils, with applications in medicine, pharmaceuticals, food, cosmetics, and with ecological impact on the natural living environment. In this context, the present work aims to analyze by GS/MS techniques the chemical composition of volatile oil obtained by hydrodistillation of leaves harvested from spontaneous and cultivated female individuals of Taxus (dried and fresh plant material) and to spectrophotometrically evaluate the hydrosols resulting from their hydrodistillation. The compounds with the highest concentrations in the volatile oil obtained from the spontaneous taxon Taxus baccata L. were hexahydrofarnesyl acetone (33.03% fresh leaves; 20.09% dried leaves); ar-abietatriene (14.98% dried leaves; 3.03% fresh leaves); phthalic acid, hex-3-yl isobutyl ester (10.51% dried leaves); salicylic acid, benzyl ester (8.11% dried leaves). In the cultivated taxon Taxus baccata the compounds identified with the highest concentrations were 1-octen-3-ol (25.61% fresh leaves); phytol (12.50% dry leaves); geranyl acetone (11.90% dry leaves); manoyl oxide (11.85% dry leaves; 10.86% fresh leaves); 1,9-decadence (7.92% fresh leaves). The compounds with the highest concentrations in the oil extracted from the leaves of Taxus baccata ‘Robusta’ were hexahydrofarnesyl acetone (17.81% fresh leaves); pentacosane (11.28% dry leaves); heptacosane (11.27% fresh leaves); tetracosane (11.13% dry leaves); tricosane (8.45% fresh leaves). The chemical composition of volatile oils from yew is influenced by many exogenous factors such as soil, light, and endogenous factors such as age, DNA.

  • Vine Pruning-Derived Biochar for Agronomic Benefits
    Diana Egri, Oana Cristina Pârvulescu, Violeta Alexandra Ion, Cristian Eugen Răducanu, Suzana Ioana Calcan, Liliana Bădulescu, Roxana Madjar, Cristina Orbeci, Tănase Dobre, Andrei Moț,et al.

    MDPI AG
    The agronomic benefits of biochar (BC) prepared by slow pyrolysis of vine pruning residues, which are produced in large quantities in Romania, were evaluated. Three soil types, i.e., slightly alkaline fluvisol (S1), slightly acidic chernozem (S2), and strongly acidic luvisol (S3), with mean values of pH of 7.99, 6.26, and 5.40, were amended with BC at a volumetric ratio between BC and soil of 20/80. A greenhouse experiment was performed for 109 days to assess the effects of BC amendment on bell pepper growth. The following treatments were applied: foliar fertilizer, BC, BC + foliar fertilizer (using two concentrations of foliar fertilizer solution), and a control. Strongly alkaline BC (pH of 9.89 ± 0.01) had a significant positive effect on the growth performance of bell pepper plants sown in the strongly acidic soil S3. The mean values of height, collar diameter, number of leaves, and root volume of plants grown in BC-amended soil S3 without foliar treatment were significantly higher (13–72% and 14–33%, respectively) than those of plants grown in non-amended soil S3 without and with foliar treatment. This beneficial effect of BC on bell pepper plant growth was due to the changes in the soil properties. BC significantly increased (up to eight times) electrical conductivity, pH, soluble phosphorus, potassium, and ammonium nitrogen concentrations of soil S3, and decreased its bulk density by 51%, resulting in improved water/nutrient uptake and plant growth performance. BC had no favourable effect on the growth parameters of bell pepper plants sown in slightly alkaline soil S1, and slightly acidic soil S2.

  • Effects of Biochar on Soil Properties and Tomato Growth
    Suzana Ioana Calcan, Oana Cristina Pârvulescu, Violeta Alexandra Ion, Cristian Eugen Răducanu, Liliana Bădulescu, Roxana Madjar, Tănase Dobre, Diana Egri, Andrei Moț, Lavinia Mihaela Iliescu,et al.

    MDPI AG
    The paper aimed at evaluating the effects of biochar (BC) produced by slow pyrolysis of vine pruning residue on soil physicochemical properties and tomato plant growth. A greenhouse experiment was conducted for 66 days, applying different treatments for 3 soil types, i.e., foliar fertilizer, BC (at a volumetric ratio between BC and soil of 20/80), BC + foliar fertilizer, and no treatments. Strongly alkaline BC (pH = 9.89 ± 0.01) had a significant beneficial effect on the growth performance of tomato plants sown in a strongly acidic soil (pH = 5.40 ± 0.02). The mean values of height, number of leaves, and collar diameter of plants grown in BC-amended soil without foliar treatment were up to 50% higher than those of plants grown in soil with the other treatments. This positive effect of BC on plant growth is due to the changes in the soil properties. The addition of BC led to increased values of electrical conductivity, pH, soluble and available nutrient concentration. Moreover, BC reduced soil bulk density by about 50%, resulting in improved plant root development and thus enhanced water and nutrient uptake. Accordingly, BC derived from vine pruning residues can improve soil quality and tomato plant growth, as well as reduce biomass residues.

  • Valorization of Vine Prunings by Slow Pyrolysis in a Fixed‐Bed Reactor
    Suzana Ioana Calcan, Oana Cristina Pârvulescu, Violeta Alexandra Ion, Cristian Eugen Răducanu, Liliana Bădulescu, Tănase Dobre, Diana Egri, Andrei Moț, Vlad Popa, and Mihaela Emanuela Crăciun

    MDPI AG
    The paper aimed at studying the slow pyrolysis of vine pruning waste in a fixed bed reactor and characterizing the pyrolysis products. Pyrolysis experiments were conducted for 60 min, using CO2 as a carrier gas and oxidizing agent. The distribution of biochar and bio-oil was dependent on variations in heat flux (4244–5777 W/m2), CO2 superficial velocity (0.004–0.008 m/s), and mean size of vegetal material (0.007–0.011 m). Relationships among these factors and process performances in terms of yields of biochar (0.286–0.328) and bio-oil (0.260–0.350), expressed as ratio between the final mass of pyrolysis product and initial mass of vegetal material, and final value of fixed bed temperature (401.1–486.5 °C) were established using a 23 factorial design. Proximate and ultimate analyses, FT-IR and SEM analyses, measurements of bulk density (0.112 ± 0.001 g/cm3), electrical conductivity (0.55 ± 0.03 dS/m), pH (10.35 ± 0.06), and water holding capacity (58.99 ± 14.51%) were performed for biochar. Water content (33.2 ± 1.27%), density (1.027 ± 0.014 g/cm3), pH (3.34 ± 0.02), refractive index (1.3553 ± 0.0027), and iodine value (87.98 ± 4.38 g I2/100 g bio-oil) were measured for bio-oil. Moreover, chemical composition of bio-oil was evaluated using GC-MS analysis, with 27 organic compounds being identified.

  • Latest developments in edible coatings on minimally processed fruits and vegetables: A review
    Amalia Carmen Miteluț, Elisabeta Elena Popa, Mihaela Cristina Drăghici, Paul Alexandru Popescu, Vlad Ioan Popa, Oana-Crina Bujor, Violeta Alexandra Ion, and Mona Elena Popa

    MDPI AG
    The food industry nowadays is facing new challenges in terms of sustainability and health implications of packaging and processing techniques. Due to their desire for new and natural products coupled with changes in lifestyle, consumers are looking for food products that have been less processed but possess longer shelf life and maintain nutritional and sensorial proprieties during storage. These requirements represent real challenges when dealing with highly perishable food products, such as fruits and vegetables. Thus, in recent years, edible coatings have been intensively developed and studied because of their capacity to improve the quality, shelf life, safety, and functionality of the treated products. Edible coatings can be applied through different techniques, like dipping, spraying, or coating, in order to control moisture transfer, gas exchange, or oxidative processes. Furthermore, some functional ingredients can be incorporated into an edible matrix and applied on the surface of foods, thus enhancing safety or even nutritional and sensory attributes. In the case of coated fruits and vegetables, their quality parameters, such as color, firmness, microbial load, decay ratio, weight loss, sensorial attributes, and nutritional parameters, which are very specific to the type of products and their storage conditions, should be carefully monitored. This review attempts to summarize recent studies of different edible coatings (polysaccharides, proteins, lipids, and composites) as carriers of functional ingredients (antimicrobials, texture enhancers, and nutraceuticals) applied on different minimally processed fruits and vegetables, highlighting the coating ingredients, the application methods and the effects on food shelf life and quality.

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