Browsing by Author "Bartkiene, Elena"
Now showing 1 - 10 of 29
Results Per Page
Sort Options
- Betaine as a functional ingredient: metabolism, health-promoting attributes, food sources, applications and analysis methodsPublication . Dobrijević, Dejan; Pastor, Kristian; Nastić, Nataša; Özogul, Fatih; Krulj, Jelena; Kokić, Bojana; Bartkiene, Elena; Rocha, João Miguel; Kojić, JovanaBetaine is a non-essential amino acid with proven functional properties and underutilized potential. The most common dietary sources of betaine are beets, spinach, and whole grains. Whole grains—such as quinoa, wheat and oat brans, brown rice, barley, etc.—are generally considered rich sources of betaine. This valuable compound has gained popularity as an ingredient in novel and functional foods due to the demonstrated health benefits that it may provide. This review study will provide an overview of the various natural sources of betaine, including different types of food products, and explore the potential of betaine as an innovative functional ingredient. It will thoroughly discuss its metabolic pathways and physiology, disease-preventing and health-promoting properties, and further highlight the extraction procedures and detection methods in different matrices. In addition, gaps in the existing scientific literature will be emphasized.
- Bibliometric analysis on pseudocerealsPublication . Akın, Melekşen; Eyduran, Sadiye Peral; Papageorgiou, Maria; Bartkiene, Elena; Rocha, Joao MiguelA bibliometric analysis on scientific documents regarding pseudocereals was performed. The literature was extracted from Web of Science database with limitations on language and index, resulting in 438 documents published until 2022. The bibliographic data were analyzed using Bibliometrix package and Biblioshiny interface available on R statistical language. The first source on pseudocereals was published in 1982 according to our data collection, and there was an increased trend of publications over the time with annual production above 11 %. The core group consisted of 11 out of 175 journals publishing on the field. Italy made the largest contribution, followed by Spain, Mexico, USA, China, among others. Collaboration network analysis was run to map associations between top countries on pseudocereals research. Six distinct sub-clusters of countries tending to collaborate together were detected. All of the publications of Israel on the area were in collaboration with other countries, whereas Argentina and Turkey published only single country publications. The most commonly used author keywords displayed with the word cloud after pseudocereals were quinoa, amaranth, buckwheat, and gluten-free. Other notable keywords were food composition, antioxidant activity, fermentation, bread, celiac disease, lactic acid bacteria, etc. The objective of the current study is to illustrate emerging trends in journal performance, collaboration networks, research constituents, intellectual structure, and evolutionary nuances of the field, thus also supporting policy development to promote research on pseudocereals utilizing bibliometrics approach.
- Certain fermented foods and their possible health effects with a focus on bioactive compounds and microorganismsPublication . Deveci, Gülsüm; Çelik, Elif; Agagündüz, Duygu; Bartkiene, Elena; Rocha, João Miguel F.; Özogul, FatihFermented foods refer to beverages or foods made by carefully regulated microbial growth and the enzymatic conversion of dietary components. Fermented foods have recently become more popular. Studies on fermented foods suggest the types of bacteria and bioactive peptides involved in this process, revealing linkages that may have impacts on human health. By identifying the bacteria and bioactive peptides involved in this process, studies on fermented foods suggest relationships that may have impressions on human health. Fermented foods have been associated with obesity, cardiovascular disease, and type 2 diabetes. In this article, fermented dairy products, vegetables and fruits, legumes, meats, and grains are included. Two elements in particular are emphasized when discussing the fermentation of all of these foods: bioactive chemicals generated during fermentation and microorganisms involved during fermentation. Organic acids, bioactive peptides, conjugated linoleic acid, biogenic amines, isoflavones, phytoestrogens, and nattokinase are a few of the bioactive compounds included in this review. Also, certain bacteria such as Lactobacillus, Bifidobacterium, Streptococcus, and Bacillus species, which are utilized in the fermentation process are mentioned. The effects of both substances including anti-fungal and antioxidant properties; the modulation of intestinal microbiota; anti-inflammatory, antidiabetes, anti-obesity, anticancer, and antihypertension properties; and the protection of cognitive function are explained in this review.
- Changes in chemical composition of lentils, including Gamma-Aminobutyric Acid and volatile compound formation during submerged and solid-state fermentation with Pediococcus acidilacticiPublication . Mockus, Ernestas; Starkute, Vytaute; Klupsaite, Dovile; Bartkevics, Vadims; Borisova, Anastasija; Sarunaite, Lina; Arlauskiene, Ausra; Rocha, João Miguel; Bartkiene, ElenaThe aim of this study was to evaluate and compare the characteristics of non-treated and fermented [via submerged (SMF) and solid-state (SSF) fermentation using Pediococcus acidilactici] lentils (Lens culinaris) grown either in pure stands (L) or relay intercropped with winter rye (LR). It was observed that the lentils were suitable substrate for lacto-fermentation. Most of the free amino acid concentrations increased in lentils after both fermentations. The highest concentration of γ-aminobutyric acid was found in SSF LR samples. However, fermentation led to higher biogenic amines (BA) content in lentils. The most abundant fatty acid in lentils was C18:2. SSF lentils showed more complex volatile compound (VC) profiles (with between nine and seventeen new VCs formed), whereas, in SMF samples, between two and five newly VCs were formed. When comparing lentil grown types, L contained significantly higher concentrations of Na, K, Ca, P, Mn, and Se, while LR contained significantly higher concentrations of Fe and Ni. To sum up, fermentation with lactic acid bacteria (LAB) contributed to the improved biological value of lentils; still, the quantity of BA needs to be considered. Further investigations into the P. acidilactici metabolism of certain compounds (such as phenolic and antinutritional compounds) in lentils during fermentation ought to be carried out.
- Changes in lacto-fermented agaricus bisporus (white and brown varieties) mushroom characteristics, including biogenic amine and volatile compound formationPublication . Bartkiene, Elena; Zarovaite, Paulina; Starkute, Vytaute; Mockus, Ernestas; Zokaityte, Egle; Zokaityte, Gintare; Rocha, João Miguel; Ruibys, Romas; Klupsaite, DovileThis study aimed to evaluate the changes in Agaricus bisporus (white and brown) characteristics (colour and acidity parameters, lactic acid bacteria (LAB) and mould/yeast counts, biogenic amine content, fatty acid (FA) and volatile compound (VC) profiles, overall acceptability, and emotions induced for consumers) during a 48 h lactic acid fermentation with Lacticaseibacillus casei No. 210, Lactiplantibacillus plantarum No. 135, Lacticaseibacillus paracasei No. 244, and Pediococcus acidilactici No. 29 strains. Fermented white and brown A. bisporus showed higher LAB count and lower pH, lightness, redness, and yellowness than non-fermented ones. Yeast and fungi counts were similar between non-fermented and fermented samples. All samples contained spermidine (on average, 191.5 mg/kg) and some of the fermented samples had tyramine (on average, 80.7 mg/kg). Saturated FA was the highest in non-fermented brown A. bisporus. The highest monounsaturated and polyunsaturated FA contents were found in Lp. plantarum No. 135 fermented white and brown A. bisporus, respectively. For the first time, the VC profile of fermented A. bisporus was analysed. 1-Octen-3-ol content significantly decreased while benzyl alcohol, acetoin, and 2,3-butanediol increased in most fermented samples. Fermented A. bisporus received good acceptability scores. The emotional evaluation showed that the LAB strain and the interaction of the LAB strain and A. bisporus variety were significant on the intensity of emotions “happy” and “sad”, while all analysed factors and their interactions were significant on the intensity of “angry” and “disgusted” (p ≤ 0.05). The findings of this study show the potential of the selected LAB strains and contribute to the increasing body of research on fermented mushrooms.
- Changes in the physicochemical properties of chia (Salvia hispanica L.) seeds during solid-state and submerged fermentation and their influence on wheat bread quality and sensory profilePublication . Bartkiene, Elena; Rimsa, Arnoldas; Zokaityte, Egle; Starkute, Vytaute; Mockus, Ernestas; Cernauskas, Darius; Rocha, João Miguel; Klupsaite, DovileThis study aimed at investigating the impacts of 24 h of either solid-state fermentation (SSF) or submerged fermentation (SMF) with Lactiplantibacillus plantarum strain No. 122 on the physicochemical attributes of chia seeds (CS). Furthermore, this study examined how adding fermented chia seeds (10, 20, and 30% concentrations) affected the properties and sensory profile of wheat bread. Acidity, lactic acid bacteria (LAB) viable counts, biogenic amine (BA), and fatty acid (FA) profiles of fermented chia seeds were analysed. The main quality parameters, acrylamide concentration, FA and volatile compound (VC) profiles, sensory characteristics, and overall acceptability of the obtained breads, were analysed. A decline in the concentration of certain BA and saturated FA and an increase in polyunsaturated FA and omega-3 (omega-3) were found in fermented CS (FCS). The same tendency in the FA profile was observed in both breads, i.e., breads with non-fermented CS (NFCS) or FCS. The quality parameters, VC profile, and sensory attributes of wheat bread were significantly affected by the addition of NFCS or FCS to the main bread formula. All supplemented breads had reduced specific volume and porosity, but SSF chia seeds increased moisture and decreased mass loss after baking. The lowest acrylamide content was found in bread with a 30% concentration of SSF chia seeds (11.5 mu g/kg). The overall acceptance of supplemented breads was lower than the control bread, but breads with 10 and 20% SMF chia seed concentrations were still well accepted (on average, 7.4 score). Obtained results highlight that fermentation with Lp. plantarum positively contributes to chia seed nutritional value, while incorporation of NFCS and FCS at certain levels results in an improved FA profile, certain sensory attributes, and reduced acrylamide content in wheat bread.
- Characteristics of lacto-fermented whey, milk, hemp and lupine proteinsPublication . Bartkiene, Elena; Klupsaite, Dovile; Starkute, Vytaute; Mockus, Ernestas; Bartkevics, Vadims; Ruibys, Romas; Batkeviciute, Gabija; Özogul, Fatih; Khalid, Muhammad Usman; Rocha, João MiguelLacto-fermentation of proteins not only improves their biological and functional value but also causes nutritional and biochemical alteration as well as the formation of undesirable compounds, which needs to be monitored. The aim of this study was to evaluate the changes in whey, milk, hemp and lupine protein characteristics (acidity, microbiological parameters, color characteristics, free amino acid (AA) profile, biogenic amine (BA) and gamma-aminobutyric acid (GABA) concentrations) during lacto-fermentation with Pediococcus acidilactici LUHS29 and Pediococcus pentosaceus LUHS183 strains. Greater lactic acid bacteria growth and drop in pH was found in fermented plant proteins than in the animal ones. The contents of free essential and non-essential AAs were increased in all proteins fermented with the LUHS29 strain. This strain also possessed a greater GABA-producing ability in all fermented proteins. Compared to plant proteins, fermented animal proteins exhibited less GABA and total BA contents. Fermented hemp proteins had the highest BA content (on average, 215.8 mg/kg), while milk proteins fermented with LUHS183 for 48 h had the lowest value. P. acidilactici LUHS29 strain could be beneficial for a notable enhancement of AA and GABA in proteins, while the monitoring of BA synthesis in fermented hemp proteins needs specific attention.
- Characteristics of unripened cow milk curd cheese enriched with raspberry (Rubus idaeus), blueberry (Vaccinium myrtillus) and elderberry (Sambucus nigra) industry by-productsPublication . Starkute, Vytaute; Lukseviciute, Justina; Klupsaite, Dovile; Mockus, Ernestas; Klementaviciute, Jolita; Rocha, João Miguel; Özogul, Fatih; Ruzauskas, Modestas; Viskelis, Pranas; Bartkiene, ElenaThe aim of this study was to apply raspberry (Ras), blueberry (Blu) and elderberry (Eld) industry by-products (BIB) for unripened cow milk curd cheese (U-CC) enrichment. Firstly, antimicrobial properties of the BIBs were tested, and the effects of the immobilization in agar technology on BIB properties were evaluated. Further, non-immobilized (NI) and agar-immobilized (AI) BIBs were applied for U-CC enrichment, and their influence on U-CC parameters were analyzed. It was established that the tested BIBs possess desirable antimicrobial (raspberry BIB inhibited 7 out of 10 tested pathogens) and antioxidant activities (the highest total phenolic compounds (TPC) content was displayed by NI elderberry BIB 143.6 mg GAE/100 g). The addition of BIBs to U-CC increased TPC content and DPPH− (2,2-diphenyl-1-picrylhydrazyl)-radical scavenging activity of the U-CC (the highest TPC content was found in C-RaNI 184.5 mg/100 g, and strong positive correlation between TPC and DPPH− of the U-CC was found, r = 0.658). The predominant fatty acid group in U-CC was saturated fatty acids (SFA); however, the lowest content of SFA was unfolded in C-EldAI samples (in comparison with C, on average, by 1.6 times lower). The highest biogenic amine content was attained in C-EldAI (104.1 mg/kg). In total, 43 volatile compounds (VC) were identified in U-CC, and, in all cases, a broader spectrum of VCs was observed in U-CC enriched with BIBs. After 10 days of storage, the highest enterobacteria number was in C-BluNI (1.88 log10 CFU/g). All U-CC showed similar overall acceptability (on average, 8.34 points); however, the highest intensity of the emotion “happy” was expressed by testing C-EldNI. Finally, the BIBs are prospective ingredients for U-CC enrichment in a sustainable manner and improved nutritional traits.
- Characterization and effect of optimized spray-drying conditions on spray-dried coriander essential oilPublication . Rahim, Muhammad Abdul; Imran, Muhammad; Khan, Faima Atta; Al-Asmari, Fahad; Regenstein, Joe M.; Alomar, Suliman Yousef; Hussain, Imtiaz; Bartkiene, Elena; Rocha, João MiguelCoriander (Coriandrum sativum L.) essential oil (CEO) has many beneficial features, including antimicrobial and antifungal properties along with good aroma. It also has an important role in food processing and preservation. However, CEO is highly volatile and sensitive to external factors (heat, light and oxygen), as well as susceptible to lipid oxidation due to environmental and general processing conditions. This limits water solubility, making it difficult to incorporate CEO into aqueous food matrices, which further limits their industrial application. Spray-drying encapsulation may prevent CEO oxidation, increase CEO oxidative stability and improve their physicochemical properties. In this study, spray-dried CEO (SDCEO) was prepared using a mini laboratory-scale spray-dryer and the processing conditions were optimized. The SDCEO were characterized in respect to free fatty acids (FFA), peroxide values (PV), fatty acid (FA) profiles, Fourier-transform infrared spectroscopy (FTIR) and physical morphology by scanning electron microscopy (SEM). Results indicated that the maximum value of FFA, PV, fatty acid composition (including petroselinic, linoleic and oleic acids) in SDCEO were observed at the following spray-drying conditions: an inlet-air temperature (IAT) of 140 °C, needle speed (NS) of 2 s and the wall-material (WM) at 25%. The minimum values were observed at an IAT of 180 °C, NS of 4 s and WM of 30%. Analysis of variance and the interaction effects of independent factors showed that IAT and WM significantly positively influenced the response for good oxidative stability. Thus, SDCEO is likely to be used as a natural active ingredient in the food processing, cosmetic, nutraceutical and pharmaceutical industries with high stability, and may be stored for a long time without evaporation or oxidation.
- Conversion of organic wastes into biofuel by microorganisms: a bibliometric reviewPublication . Akın, Melekşen; Bartkiene, Elena; Özogul, Fatih; Eyduran, Sadiye Peral; Trif, Monica; Lorenzo, José M.; Rocha, João MiguelThis paper presents a bibliometric research of scientific documents on biofuel production from organic wastes extracted from the Web of Science (WoS) database. Original research and conference proceeding articles published until 2022 year were considered, which resulted in 773 documents. The objective of the study was to track evolutionary nuances and emerging trends of the topic, as well as upgrade knowledge in the area and help formulate scientific policies. The work concentrated on the most productive countries, authors and journals, as well as authors’ keywords in documents relating to the biofuel conversion from biomass. The first paper on the field was published in 2004, and the publication number showed increasing trend with over 27% annual growth. The USA, followed by China demonstrated the highest publication and citation number. The thematic map analysis displayed the multidisciplinary nature of the topic, implying that the progress of several research domains is required for this technology. This is the first bibliometric review on biofuel from organic waste by microorganisms in the literature. The investigation results emphasize the need for further research in the area and also highlights the need for higher collaboration.
- «
- 1 (current)
- 2
- 3
- »