Selected methods for yeast cell disruption were evaluated to establish their suitability wall preparation in the process of β-glucan isolation. The effect different on contents total saccharides, β-glucans and proteins produced walls preparations was analyzed. degree purification from intracellular components established basis ratio solubilised material. investigated included: exposure hot water (autoclaving), thermally-induced autolysis, homogenization a bead mill, sonication combinations....

The exopolysaccharides (EPS) produced by yeast exhibit physico-chemical and rheological properties, which are useful in the production of food cosmetic pharmaceutical industries as well. effect was investigated selected carbon sources on biosynthesis EPS Candida famata guilliermondii strains originally isolated from kefirs. biomass yields were dependent source (sucrose, maltose, lactose, glycerol, sorbitol) ranged 4.13 to 7.15 g/L. highest yield reported for C. after cultivation maltose....

Probiotics are recommended, among others, in the diet of children who under antibiotic therapy, or that suffer from food allergies travel diarrhea, etc. In case toddlers taking probiotic preparations, it is highly recommended to first remove special capsule, which normally protects strains against hard conditions gastrointestinal tract. Otherwise, toddler may choke. This removal can impair survival and reduce its efficacy a toddler's organism. The aim this study was evaluate survivability...

Bacterial cellulose (BC) is a natural exopolysaccharide characterized by high purity, mechanical strength, and the ability to absorb various compounds. Obtaining BC on an industrial scale expensive, mainly due cost of culture media. Replacing classical media with waste from agri-food industry may be promising way reduce costs when obtaining BC. The aim these studies was compare effectiveness biosynthesis in using two strains, Komagataeibacter xylinus K2G30 Gluconacetobacter hansenii ATCC...

Single cell oils (SCO) can be a source of nutritionally valuable fatty acids and raw material in biodiesel production. Among the oleaginous yeasts, those which additionally generate carotenoid pigments are beneficially distinguished. Rhodotorula Sporobolomyces strains were screened for ability to grow produce intracellular lipids medium containing pure glycerol. In this paper, we verified that glycerol is unfavorable carbon strain S. salmonicolor good growth increases content biomass...

The purpose of this paper is twofold: on the one hand, we verify effectiveness alternatives solutes to sucrose solution as osmotic agents, while other hand intend analyze modeling transfer parameters, using different models. There has also been proposed a new mass parameter-true water loss, which includes actual solid gain during process. Additional consideration ratio (Cichowska et al. Ratio) can be useful for better interpretation dehydration (OD) in terms practical applications. Apples v....

Can microbial cellulose (MC) be used as a bio-carrier for 1,3-dihydroxy-2-propanone (DHA)? The aim of this study was to examine the possibility using MC biomaterial DHA transferring into stratum corneum and inducing changes in skin color. patches were obtained from Gluconacetobacter xylinus strain incubated solutions with various concentrations (g·L-1: 20; 50; 80; 110) at 22 °C 24 h. Afterwards; applied onto 15, 30, or 60 min. Skin color assessed visually compared control without DHA....

Propionic acid (PA) is an important organic with applications in food preservation, feed additives, and bio-based chemical production. While industrial PA mostly derived from petrochemical processes, sustainable microbial alternatives are gaining attention. In this study, we explored a co-fermentation strategy using lactic bacteria (LAB) complementary metabolic capabilities to enhance biosynthesis via the 1,2-propanediol (PDO) pathway. Genome-based screening identified division between...

Essential oils (EOs) are liquid preparations produced from plant materials. Their use as inhibitors of the growth spoilage and pathogenic microorganisms is a good alternative to chemical additives in foods. The disc-diffusion method was used screen EOs thyme, cinnamon, clove, peppermint, marjoram, cumin, rosemary, fennel, basil, lime, bergamot orange, lemon, grapefruit, mandarin, cardamom, anise, ginger, against 21 strains Cronobacter species, including: C. sakazakii, muytjensii, turicensis,...

Biocellulose, named “the biomaterial of the future”, is a natural and ecologically friendly polymer, produced by selected acetic acid bacteria strains. Biocellulose impregnated with antimicrobial agents can be used as novel, safe, biodegradable food packaging material, helping extend shelf life some products may also have chance to replace typical plastic packaging, which big environmental problem these days. This study aimed evaluate if cellulose impregned oregano essential oil could show...

Dihydroxyacetone (1,3-dihydroxy-2-propanone, DHA) is applied in the food and cosmetic industries as well pharmacy medicine. It produced a result of incomplete oxidation glycerol by acetic acid bacteria Gluconobacter oxydans. This reaction catalyzed PQQ-dependent membrane-bound dehydrogenase. The research developed method obtaining DHA 3 % aqueous solution (pH 7.5) at temperature 23 °C, with only biocatalyst being an immobilized cell preparation obtained from G. oxydans cells. After 5 days...

Abstract Exopolysaccharides (EPS) are one of the classes extracellular biopolymers synthesized by bacteria. Some strains lactic acid bacteria (LAB) used in dairy industry able to synthesize EPS (EPS(+) strains). may be secreted a cell form capsule or slime. Our review describes factors influencing activity production LAB, impact use EPS(+) on quality fermented milk products (yoghurt, cheeses, etc.) and pro-health properties produced LAB. The capability LAB depends many factors, e.g.,...

Bacteria of the species Gluconobacter oxydans are applied in industrial production dihydroxyacetone (DHA) via glycerol oxidation. The major problem this biotransformation involves process inhibition by substrate and/or product. Improper initial concentration and increasing DHA may inhibit metabolic activity bacterial cells impede further course reaction. An attempt was, therefore, undertaken study to determine which concentrations (30, 50, 70, 100 g L−1) (10–100 growth acetic acid bacteria...

genus bacteria are food-borne pathogens. Foods contaminated with

Waste glycerol is the main by-product generated during biodiesel production, in an amount reaching up to 10% of produced biofuel. Is there any method which allows changing this waste into industrial valuable compounds? This manuscript describes a for valorization crude via microbial bioconversion. It has been shown that use free and immobilized biocatalysts obtained from Gluconobacter oxydans can enable beneficial industrially dihydroxyacetone. The highest concentration compound, over 20...

Depletion of petroleum resources has enforced the search for alternative sources renewable energy. Introduction biofuels into market was expected to become a solution this disadvantageous situation. Attempts cover fuel demand have, however, caused another severe problem—the waste glycerol generated during biodiesel production at concentration approximately 10% w/w. This, in turn, prompted global effective methods valorization fraction glycerol. Utilization 48 h with an initial 30 g·L-1 and...

The aim of this work was to analyse the effect ultrasound-assisted osmotic dehydration apples v. Elise on mass transfer parameters, water activity, and colour changes. Ultrasound treatment performed at a frequency 21 kHz with temperature 40 °C for 30–180 min using four solutions: 30% concentrated syrups erythritol, xylitol, maltitol, dihydroxyacetone (DHA). efficiency used solutes from polyol groups compared reference in 50% sucrose solution. Peleg’s model fit experimental data. Erythritol,...

Adjunct cultures are used in cheesemaking to improve the sensory characteristics of ripened cheeses. In addition, it is known that different adjunct capable producing enzymes with specificity hydrolyze caseins, leading release various bioactive compounds (bioactive peptides, amino acids, etc.). The objective this study was evaluate effect heat-treated starter XT–312 and a cheese culture Lb. helveticus LH-B01 on proteolytic activity angiotensin converting inhibitors (ACE) models during...

Processed cheeses (PC) are products resulting from the mixing and melting of rennet cheese, emulsifying salts, water, possibly various additional ingredients. They considered good vehicles for new ingredients, including plant-based ones. In addition to health-promoting effects some them can also affect positively quality characteristics PC (e.g., texture, taste, consistency) their may reduce amount salts used. The aim study was determine possibility 0.5, 1.0, 2.0, 3.0% white mulberry (M),...

Cronobacter condimenti are environmental commensals that have not been associated with any clinical infections. To date, they the least understood and described species within genus. The objective of this study was to use a draft genome sequence (DGS) strain s37 screen for genes encoding antibiotic resistance, virulence, response stress, biofilm formation. isolated in Poland from commercial small radish sprouts. This is second available GenBank database. comparative analysis (cgMLST) C....