Potravinarstvo Slovak Journal of Food Sciences
Not a member yet
1254 research outputs found
Sort by
Forming the system of food security indicators following the criteria of the SDGs-2030
Get PDFEffective management of any system is impossible without a clear definition of its elements, hierarchical levels, and desired performance indicators. Considering this problem in the context of food security management, the authors set out to create a system of food security indicators at different hierarchical levels. The purpose of the article is to deepen theoretical and methodological provisions and develop a system of indicators as a component of food security management at different levels, which should meet the criteria and dimensions of the SDGs-2030. The methodological basis of the research is the dialectical method and general scientific and special methods of scientific knowledge. The results obtained are of great practical importance in shaping national and regional food security policies (programs) on a sustainable development basis. Proceeding from the results of the research and the scientific and theoretical positions of the epistemological content of the category of the concept “food security”, taking into account the criteria of food security of formation at different hierarchical levels and methodological aspects of its monitoring, it is proposed 54 indicators
Aroma marketing as a tool to increase turnover in a chosen business entity
Get PDFThe paper deals with the evaluation of the effectiveness of the application of aroma marketing describing a few possibilities of using aromatization in practice. Nowadays, many sophisticated tools are used in marketing and consumer behavior, such as sensory marketing and sensory perception. The following is the term of marketing communication and its division into the above-the-line and below-the-line communication, sales promotion, and in-store communication. The paper also focused on the new trends in the place of sale and aroma marketing. The subject of the practical part is the use of the aroma in the food store. An important part consists of a characteristic of the alliance, questionnaire survey, comparison of achieved sales volume and sales before placing the aroma diffuser, and while it was placed in the grocery store. The article aims to find out how the coffee aroma in the store influenced consumer decision-making and stimulated them to impulsive purchase and consequent influence on the company turnover. Concerning the results of our observation and questionnaire survey, we formulate suggestions and recommendations for the business operation and practice. The whole research was made in the grocery store “Môj obchod”
Slovak consumers´ perception of bakery products and their offer in retails
Get PDFBakery products represents an important part of the diet and have an irreplaceable role in the proportion of nutrients, but their popularity in the diet of Slovak consumers continues to decline. For this reason it is necessary to address the issue of bakery products with regard to their consumption. The aim of the paper is to point out the development of consumption of bakery products in the Slovak Republic and to identify the main factors determining their purchase from the perspective of Slovak consumers. Secondary and primary data were used to meet this aim. Secondary data were obtained from the Statistical Office of the Slovak Republic in order to describe trends in consumption of selected foodstuffs in the period 2009 – 2018, as well as to predict the development of consumption of wheat and durable bread by 2020. The development of consumption is influenced by a number of factors, which may include, in particular, the price of products, the existence of substitution products, changes in eating habits and preferences of Slovak consumers, consumer health restrictions, as well as the taste factor. The primary data were obtained through consumer and business-oriented research in the Slovak Republic. The results of the consumer survey showed both rationality and irrationality in consumer decisions when buying bakery products. Rational aspects in the purchase of bakery products are factors of composition and durability. Irrationality in consumer behavior when buying can be accompanied by psychological factors, which include the perception of freshness of bakery products, the perception of prices, the perception of the country of origin, as well as sensory aspects such as taste. The achieved results were confronted with the results of a retail-oriented survey. The results showed that the commercial premises, when offering bakery products, mainly take into account the freshness, price and country of origin of selected foods
The comparison of HPLC and spectrophotometric method for cholesterol determination
Get PDFThe present study was carried out to compare two different analytical methods (HPLC and spectrophotometric) for determination of cholesterol content in milk while cholesterol in food is important not only for the nutritional value setting of foods but also due to the validation of a fast, reliable and economical method for studying the possible mechanism of its reduction. Spectrophotometric determination of cholesterol content was based on the Liebermann-Burchard (LB) reaction among cholesterol, ethyl acetate, acetic anhydride, plus concentrated H2SO4 and measuring absorbance of formed color at 625 nm. HPLC method was performed by column chromatography on reverse phase C18 with DAD detection at 205 nm. The methods were applied to the milk sample. The achieved LOD and LOQ for HPLC were 2.13 mg.kg-1 and 6.45 mg.kg-1, respectively, while for spectrophotometric method were 12.55 and 38.04 mg.kg-1. The difference between cholesterol content determined by both methods was statistically insignificant at p <0.05. Therefore, it can be concluded that both methods are suitable for determination of cholesterol content in milk, however, HPLC method exhibited higher sensitivity and lower limits of detection or quantification, respectively
Effects of the lactation period, breed and feed on amino acids profile of mare’s milk
Get PDFThe effects of the lactation period, breed, and feed on amino acids profile of mare’s milk were investigated. The feed contained two major essential amino acids (EAAs) leucine (7.31 – 10.3 g.kg-1) and arginine (6.37 – 9.59 g.kg-1); it also included minor EAAs methionine (2.11 – 3.05 g.kg-1) and histidine (2.48 – 3.60 g.kg-1). Glu+Gln, Asp+Asn, and proline, major nonessential amino acids (NEAAs), constituted approximately 60% of total NEAAs (TNEAAs). The ratio of total EAAs to NEAAs ranged from 1:1.2 to 1:1.4. Amino acids (AA) content throughout all milk samples varied due to mare’s different conditions and lactation days. Except for the 1P milk sample, total AA content in the 2 – 8Ps specimens caused by differences in breed oscillated from the 2nd to 28th day of lactation within the following limits: 21.9 – 54.6 g.kg-1, 33.6 – 70.7 g.kg-1, 38.1 – 71.2 g.kg-1, 29.46 – 74.2 g.kg-1, 52.2 – 87.1 g.kg-1, 37.9 – 70.3 g.kg-1 and 26.4 – 64.5 g.kg-1, respectively. In relation to TEAAs in milk, the highest EAAs levels were reached in arginine, leucine and lysine ranging between 2.41 – 4.35 g.kg-1, 3.36 – 5.59 g.kg-1 and 2.72 – 4.80 g.kg-1, respectively, while the lowest AAs amounts were indicated in histidine and methionine, 0.91 – 1.58 g.kg-1 and 1.23 – 2.04 g.kg-1 respectively. Total NEAAs content was slightly higher than that of EAAs; the TNEAAs to TEAAs ratio was 1:0.9 proximately. Glu+Gln, Asp+Asn and proline were determined as major NEAAs of milk ranging between, 6.77 – 11.0 g.kg-1, 3.21 – 5.60 g.kg-1 and 1.25 – 2.18 g.kg-1, respectively; levels of NEAAs such as cysteine and glycine oscillated between 0.89 – 1.52 g.kg-1 and 0.64 – 1.15 g.kg-1, respectively. The average TAAs contents caused by breed differences were 62.8 g.kg-1, 42.8 g.kg-1, 44.7 g.kg-1 and 44.8 g.kg-1, respectively, on the 2nd, 5th, 10th, and 28th lactation days
The consumer behavior of Slovak millennials in the segment of milk and dairy products within private labels
Get PDFDespite the fact that the dairy industry has an important position in the food industry (with an 18% share in its total production and sales), dairy businesses are currently struggling with low consumption of milk and dairy products. According to most researchers, the low consumption of milk and dairy products is mainly due to poor eating habits and, last but not least, insufficient promotion of these products. There is also an opportunity for private labels, which are recently on the rise, for which milk and dairy products are the most commonly purchased category of food. This paper aimed to find out how Slovak millennials perceive private labels, in which categories they buy them, what motivates them and on the contrary, discourages them from the purchase, etc. As the main research method, there was chosen the method of anonymous questionnaire survey involving 549 respondents from all over Slovakia; which was subsequently supplemented with a blind test. The submitted results of research declared that our goals were fulfilled and the following conclusions can be stated: Slovak millennials buy private labels in particular in the category of milk and dairy products, perceive private labels as an adequate alternative to their purchase and when purchasing milk and dairy products, they are mostly influenced by recommendations of family and friends and the tasting
Effect of somatic cell count on milkability and milk composition of ewes
Get PDFThe trial aimed to study the effect of somatic cell count, breed, milk flow type, and parity on the milkability and milk composition of ewes. The flock consists of purebred Lacaune ewes (LC; n = 29) and crossbreds ewes of Improved Valachian (IV x LC; n = 35) and Tsigai (TS x LC; n = 37) with LC (with a genetic portion of Lacaune 25 and 50%). Ewes were assigned according to somatic cell count (SCC) to one of the following three groups: SCC ≤300,000 cells per mL (SCC Group 300,000), SCC between 300,000 and 1000,000 cells per mL (SCC Group 300,000 – 1000,000), SCC ≥1000,000 cells per mL (SCC Group 1000,000). 56% of evaluated ewes had less than 300,000 cells per mL and 29% more than 1000,000 cells per mL in milk. No significant differences were observed between different groups of SCC in total, machine milk yield, and the proportion of milk yield in 30 s and 60 s. The significant differences were observed between SCC Group 300,000 and SCC Group 300,000 – 1000,000 in the proportion of machine stripping from total milk yield (41 ±2 vs. 57 ±4%). Milk flow type had a significant effect on all evaluated milkability parameters but not on milk composition. Ewes on fourth parity had the highest proportion of machine stripping from total milk yield then ewes on third, fifth, and sixth and higher (60% vs. 47, 45, 46%; resp.). Effect of SCC Group on milk composition manifested only in solids not fat. The significant differences were observed between SCC Group 1000,000 to SCC Group 300,000 and SCC Group 300,000 – 1000,000 (10.75 ±0.08% vs. 11.05 ±0.06 and 11.15 ±0.11%, p ≤0.0004)
Biologically active compounds contained in grape pomace
Get PDFA healthy lifestyle and gastronomic trends based on traditional and local foods accompanied by waste-free technologies are currently in the primary focus. One of the raw materials with properties in alignment with such requirements is grape pomace. This paper evaluates the antioxidant activity of grape pomace (which is homogenized into a brown powder) and selected commonly available commercial flours – wheat bread, rye plain, and rye whole grain flour – using DPPH (2,2‑diphenyl-1-picryl-hydrazyl-hydrate) and total polyphenol content method, where was used Folin-Ciocalteaure agent and then it was determined by spectrophotometric method (the measure of absorbance). The total amount of polyphenols in grape pomace was measured of 47.94 mg GAE.g-1, but the value 0.27 mg GAE.g-1 was measured in wheat bread flour. Grape pomace performed the antioxidant activity of 57.45 mg AAE.g-1, whereas wheat bread flour of only 0.21 mg AAE.g‑1 Compared to selected commercial flours, the total amount of polyphenols in grape pomace was up to 150 times higher and the ratio of antioxidant activity between grape pomace and wheat bread flour was even more than 280 times higher. This makes it possible to fortify commercial, commonly available flours with different amount of grape pomace so that products with a higher amount of biologically active substances can be prepared. Another benefit could be a reduction in health risks and a contribution to improving consumer health
Procedures for the identification and detection of adulteration of fish and meat products
Get PDFThe addition or exchange of cheaper fish species instead of more expensive fish species is a known form of fraud in the food industry. This can take place accidentally due to the lack of expertise or act as a fraud. The interest in detecting animal species in meat products is based on religious demands (halal and kosher) as well as on product adulterations. Authentication of fish and meat products is critical in the food industry. Meat and fish adulteration, mainly for economic pursuit, is widespread and leads to serious public health risks, religious violations, and moral loss. Economically motivated adulteration of food is estimated to create damage of around € 8 to 12 billion per year. Rapid, effective, accurate, and reliable detection technologies are keys to effectively supervising meat and fish adulteration. Various analytical methods often based on protein or DNA measurements are utilized to identify fish and meat species. Although many strategies have been adopted to assure the authenticity of fish and meat and meat a fish products, such as the protected designation of origin, protected geographical indication, certificate of specific characteristics, and so on, the coverage is too small, and it is unrealistic to certify all meat products for protection from adulteration. Therefore, effective supervision is very important for ensuring the suitable development of the meat industry, and rapid, effective, accurate, and reliable detection technologies are fundamental technical support for this goal. Recently, several methods, including DNA analysis, protein analysis, and fat-based analysis, have been effectively employed for the identification of meat and fish species
Preference mapping of Slovak cheese
Get PDFThe production of steamed cheese has a long tradition in Slovakia. Some of these cheeses have even received the PGI designation, which is a designation granted to products with specific geographical characteristics (Slovenská parenica, Zázrivské vojky, Zázrivský korbáčik, and Oravský korbáčik). In our study, eight samples of various unsmoked steamed cheese from small dairy farms (samples D, F, G, and H) and medium-sized farms (A, B, C, and E) were evaluated. Our work aimed to determine whether there are significant differences in sensory characteristics between samples from small and medium-sized dairy farms and whether there are differences in the preferences between these samples for consumers. Samples were evaluated by sensory analysis, where the assessors evaluated the characteristics of color, odor, texture, flavor, and overall appearance on a nine-point hedonic scale. Differences at a statistically significant level in the attributes of odor, texture, flavor, and overall appearance were confirmed (p <0.05) between samples from small and medium dairy farms, no statistically significant difference was proved in the attribute color (p >0.05). The results were processed using PCA, whereas can be seen from the graphic representation the carriers of all evaluated attributes were samples from medium-sized farms (except for sample D, which belonged to the first group of samples together with samples from medium-sized farms). We constructed a preferential map by combining internal and external mapping, while the internal data were formed by data obtained from assessors using sensory analysis and the external data came from an online questionnaire. Using the preferential mapping technique, we found out that samples from medium-sized dairy farms were classified as the most preferred samples which correspond with the results of sensory analysis