Confectionery Fats Research Articles

Technology for obtaining a domestic catalyst for hydrogenation of vegetable oils

Vegetable oils are obtained from oil-containing sunflower seeds, burdock, flax, rapeseed, corn, soybeans, etc. The composition of vegetable oils contains esters (triglycerides) of fatty acids with varying degrees of unsaturation. One of the main processes of vegetable oil processing is the hydrogenation process. Hydrogenation of vegetable oils is a widespread technological process of obtaining raw materials for the production of confectionery fats, detergents, soaps, stearin and other products. It is the hydrogenation of vegetable oils that is of great importance, because it increases the volume of food production. Catalysts for hydrogenation of vegetable oils are not produced in Russia. The volume of the import market is about 250 tons per year. The development and production of domestic catalysts is a priority task in solving import substitution problems. The paper suggests the most environmentally friendly and economical way to obtain catalysts of various chemical compositions is the method through an ammonia-carbonate complex. The results of reserve tests of the developed samples of nickel catalyst for hydrogenation of vegetable oils, as well as the conclusion of potential consumers are presented.

Influence of Components of Palm Oil on the Character of Metabolism in the Human Body

Introduction: Demand for vegetable oils is currently growing worldwide and palm oil is a significant contributor to the global supply of edible oils. Over the past few decades, there has been a growing public concern about the significant interaction between health and nutrition and palm oil (PO) in particular.Purpose: The purpose of the research is to analyze the influence of PO components on the nature of metabolism in the human body and the development of pathological conditions.Materials and Methods: The search for literature on the problem over the past 105 years was carried out in the databases of the RSCI, Google Scholar, ResearchGate, PubMed using keywords and phrases: «palm oil», «human health», «diabetes», «obesity», «cardiovascular disease», «oncology», «baby food».Results: General information about PO in the food industry is given. Despite the good quality of palm kernel oil and its beneficial properties, the food industry requires another product – light-colored PO. This implies its mandatory cleaning by chemical treatment (alkali or acid) or physical methods. Deodorized PO, low in impurities and highly bleached, is considered a high quality product for the food industry. It contains 50% saturated fatty acids (palmitic, stearic, 40% monounsaturated (oleic) and 10% polyunsaturated fatty acids (linoleic). In 2022, PO produced 76,039 million metric tons or 36% of the total amount of all oils produced in world. The use of refined PO in the food industry is growing exponentially due to its consumer properties of this product: texture, aroma and neutral taste. Different fractions of PO are used in different ways in the food industry.Palm olein is used for frying and in the production of margarines, spreads, mayonnaise, vegetable cream ice cream Palm stearin is a component of confectionery fats and is used for the production of bakery products, sweets, cakes, cheese, chips, chocolate, cookies, crackers, donuts, frozen meals, instant noodles, popcorn, salad dressings, snacks, soups.Clinical and experimental studies in recent years indicate that PO can cause the development of insulin resistance (type 2 diabetes mellitus (DM-2)) and metabolic disorders, including obesity, coronary heart disease, stroke, and various cancers. Therefore, a number of US and EU dietary guidelines aim to limit the consumption of PO in foods. However, the data of epidemiological studies conducted in various countries of the world are quite contradictory. This suggests that the assessment of the impact of PO on health must first of all take into account ethnogenetic characteristics, as well as national food traditions. Russian scientists and foreign scientists, based on the results of clinical studies, conclude that PO, as a fatty component of infant formulas, negatively affects Са2+ metabolism in the intestines of infants. Therefore, the use of PO as a component of breast milk substitutes in infant formulas should be limited and other components should be used, in particular formulas with β-palmitate or milk fat.Conclusion: General information about PO in the food industry is given. The role of PO and palmitic acid in the development of obesity and DM-2, in the development of cardiovascular diseases, and also in the occurrence of oncological diseases is shown. The possibilities of using PO in baby food are characterized. The opinion of Belarusian and Russian scientists on the impact of PO on human health is given.

Гибридный гель для замены твердых жиров в кондитерских изделиях

The World Health Organization recommends reducing the intake of saturated fatty acids. However, a direct replacement of solid fats with liquid oils affects the technological and consumer properties of food. The research objective was to develop a hybrid gel with a dense structure based on oleogel and hydrogel to replace saturated fats in semi-finished confectionery products.
 The study featured samples of oleogel from sunflower oil and beeswax at a concentration of 10, 15, and 20% and hybrid gels prepared by mixing the oleogel with a 2% aqueous solution of sodium alginate at ratios of 99:1, 95:5, and 90:10. The samples were tested for strength, adhesive power, viscosity index, consistency, and Young modulus using a TA-XT Plus texture analyzer (Stable Micro Systems Ltd., UK). The water activity was studied using a water activity analyzer LabMaster (Novasina, Lab Master, Switzerland).
 The oleogel samples with wax concentrations of 20 and 15% demonstrated good adhesive strength. The best hybrid gel was the oleogel with 20% wax at the ratio of 95:5 to hydrogel. This ratio resulted in a considerable gel strength (≤ 408.222) while maintaining a dense and uniform texture (Young modulus ≤ 17.05) for a long time. The oleogels had low moisture content (Aw = 0.6 ± 0). The shelf life at 4–10°C was 6 months. The samples had good sensory properties, i.e., clear taste and smell, strong uniform structure and consistency, etc. The paper introduces a formulation for a semi-finished confectionery product with a hybrid gel instead of 30% cocoa butter substitute.
 Hybrid gels can be recommended as a substitute for cocoa butter or confectionery fats to reduce the amount of saturated and trans fatty acids. Such a replacement improves the consumer properties of semi-finished and finished products.

Differential scanning calorimetry for authentication of edible fats and oils - What can we learn from the past to face the current challenges?

Fats and oils authentication has become an important issue recently, due to the growing interest in consumption of cold-pressed oils. Therefore, it is becoming more and more difficult to maintain official control over the growing assortment of new cold-pressed oils. Authenticity of plant oils is also an important issue for religious or cultural reasons.This review article focuses on the application of differential scanning calorimetry (DSC) in the field of assessing authenticity of various fats and oils (e.g. olive oil, palm oil, confectionery fats, butter). Extra virgin olive oil (EVOO) is the most comprehensively tested oil by means of the DSC technique in terms of the authenticity of origin as well as the adulteration with foreign oils. In most of the studies on DSC applicability for authentication, crystallization and melting curves were analyzed by the conventional DSC, although other modified DSC methods were also applied, such as isothermal freezing, modulated temperature DSC (MT-DSC) and fast DSC. However, the most promising are the melting profiles, which, due to the complexity of transitions, need advanced chemometric tools as well as tools for peaks deconvolution. The future prospect of using DSC in the authenticity assessment lies also in the use of DSC techniques along with other complementary chromatographic or spectroscopic techniques.

Characteristics and feasibility of olive oil-based diacylglycerol plastic fat for use in compound chocolate

With an aim to prepare the healthier functional chocolate, olive oil-based diacylglycerol plastic fat (ODAGP) was prepared by mixing olive oil-based diacylglycerol stearin (O-DAGS) and olive oil-based diacylglycerol olein (O-DAGO) as confectionery fat in compound chocolate. We reported the physicochemical properties of ODAGP and ODAGP-CB blends, and then evaluated their application potential in compound chocolate based on sensory, blooming property and polymorphic transition. ODAGP (40% O-DAGS) showed a wide plastic range (7.1–45.2%) and high component compatibility. The crystal properties results indicated that ODAGP mainly existed in stable β-forms (β1 and β2). On the other hand, the ODAGP-CB binary system containing 10–40% ODAGP displayed similar melt-in-mouth property and crystal polymorphism (Form V) to natural CB. Compound chocolate prepared with ODAGP-CB blends obtained satisfactory overall acceptability (score > 7.8) and showed stronger fat bloom resistance.

Synthesis of confectionery fat from illipé butter stearin and palm mid‐fraction blend via enzymatic interesterification

AbstractCocoa butter equivalent (CBE) was synthesised from blends of illipé butter stearin (IBS) and palm mid‐fraction (PMF) via enzymatic interesterification (EIE). IBS was blended with PMF in three wt ratios (70:30, 60:40 and 50:50) and the EIE reactions were performed at 50°C for 30 min using an sn‐1,3‐specific lipase from Rhizopus oryzae as a catalyst. The triacylglycerol (TAG) compositions, slip melting points (SMP), crystallisation and melting thermograms, solid fat content (SFC) curves, and crystal microstructure of the blends before and after EIE were studied and compared with cocoa butter (CB). After EIE, the contents of POP and StOSt decreased, whereas the POSt content increased in all blends. Blend EIE 60:40 exhibited the POP and StOSt contents that situated within the ranges of POP and StOSt contents of CB. It also showed SMP, melting peak and melting completion temperatures, melting enthalpy and crystal microstructure most similar to CB. Most importantly, its SFC curve completely matched that of CB. Consequently, EIE 60:40 was chosen for further investigation and it was found to be fully compatible with CB and crystallised into the same polymorphic form (β) as CB. Therefore, EIE 60:40 has a high potential for use as a commercial CBE.

Влияние жировых продуктов на качественные характеристики, пищевую ценность и хранимоспособность печенья

Introduction. The quality profile and nutritional values of cookies depend on the raw material. The research objective was to study the effect of oils and fats on the quality characteristics and storage capacity of cookies.
 Study objects and methods. The study involved such types of oils and fats as margarine, confectionery fat, milk fat substitute, palm oil, sunflower oil, and high oleic sunflower oil. It was based on standard methods of sensory, physicochemical, structural, and rheological analyses.
 Results and discussion. The experimental formulations relied on contemporary dilatory recommendations, consumer acceptability, and traditionality of sensory indicators. The mass fraction of fat was limited to ≤ 18%; added sugars – to ≤ 22%; salt – to ≤ 0.3%. For each type of oil and fat, as set of experiments was performed to define the optimal technological emulsion and dough parameters. Other aspects involved the patterns of moisture transfer, indicators of oxidative spoilage, fatty acid composition, sensory properties, physicochemical and microbiological indicators, storage capacity, etc. The samples with vegetable oils instead of fat had a lower content of saturated fatty acids, which fell from 8–9 to 2–3 g/100 g. However, the risk of oxidative spoilage increased significantly. On storage day 104, the content of linoleic acid in the samples with sunflower oil decreased from 62.0 to 60.4%, while the samples with high oleic sunflower oil maintained the same level of linoleic acid. The samples with confectionery fat and palm oil demonstrated the lowest rate of oxidative processes, while those with margarine and milk fat substitute had the best sensory profile after storage.
 Conclusion. The cookies with sunflower oil and high oleic sunflower oil appeared to have a shelf life of two months, while for those with milk fat substitute, margarine, palm oil, and confectionery fat it was six months. Further research should focus on various emulsifiers and antioxidants capable of forming bonds with proteins and starch fractions of flour, which could increase the resistance of liquid vegetable oils to oxidation.

Obtaining technologically and physiologically functional special-purposes of fat products

The possibilities of obtaining special fat products for baking and confectionery products based on two-stage hydrogenation, both on stationary promoted and dispersed catalysts, are investigated. At the same time, at the first stage, non-selective partial hydrogenation was carried out to obtain liquid baking fats characterized by a sufficient amount of solid glycerides, and at the second stage, this partially hydrogenated fat was subjected to final selective hydrogenation to obtain high-solid confectionery fat. In order to enrich the obtained fats with polyunsaturated fatty acids of the group ω-3, it was first proposed to mix these fats with non-fat flaxseed flour to obtain functional fat-flour compositions.

Моніторингові дослідження якості кондитерських жирів та глазурей за жирнокислотним складом

Availability of a wide range of fats and growing production volumes brings to the forefront the issue of reasonable choice of their use in the manufacture of confectionery products and requires quality control of the most common domestic market confectionery fats and glazes. Purpose of the work is to evaluate the quality of the fatty acid composition of fats and glazes manufactured in Ukraine these being in active demand in the food industry for various fillings of confectionery products, candies and chocolate. Subject of study: fatty acid composition and content of trans-isomers of confectionery fats and glazes which are used for the production of confectionery products and affect their nutritional value. Research methods: chromatographic method using gas chromatographs «Cupol-55» and «CrystalLux 4000». Results of the study: it was found that all samples of confectionery fats and glazes differ in fatty acid composition, which is associated with the composition of raw materials and methods of production. In particular, the vast majority of confectionary fats of the non-lauric type contained significantly less saturated acids, about 36-48 %, whereas the lauric type contained 70 %. A distinguishing characteristic was also the amount of monounsaturated acids, which were 25-31 % and 36-46 % for lauric and non-lauric confectionary fats, respectively. The total content of trans-isomers in the analyzed samples of confectionary fat was 0.12-2.88 %. However, elevated trans-C18 : 1 isomer content was shown for 2 of the 11 confectionery glaze samples: in confectionery glaze №155-D – 6,26 %, and in confectionery glaze № 264 – 21,11 %. The confectionary glaze samples are characterized by a more diverse composition of fatty acids at the expense of milk fat, as evidenced by the presence of short-chain acids C4-C10 and other animal fats (presence of conjugated linoleic acid). At the same time, the saturated acid content varied in a wide range from 25 to 47%. The obtained data can be used to produce food products with the predetermined consumer properties.

THEORETICAL ASPECTS OF THE DEVELOPMENT OF NEW TYPES OF
 CONFECTIONERY PRODUCTS OF INCREASED NUTRITIONAL VALUE
 AND DIRECTED EFFICIENCY

The article presents the main results of fundamental research carried out by specialists of the group for the confectionery industry of the technology confectionery and oil and fat products department in 2008–2020. The chemical composition and technological properties of soluble fibers — inulin and oligofructose, as well as the source of inulin — Jerusalem artichoke, have been studied, their optimal dosages in the manufacture of zephyr have been determined, allowing to achieve technological effects and enrich the finished product with food fibers. Studied the composition of the linen cake and its influence on the quality of biscuits. The optimal dosages of linen cake have been established to increase the nutritional and biological value of the biscuits. The possibility of using durum wheat flour in the manufacture of biscuits has been studied. Influence of proteolytic enzyme, sugar and fat on protein proteolysis in confectionary dough for production of soluble biscuits is studied. It is defined that sugar and fat reduce speed of protein proteolysis, at that sugar has more inactivate ability. Optimal quantity of proteolytic enzyme is 0,15 % to mass of wheat flour. The rheological properties of syrups based on sweeteners for muesli bars have been investigated. Established the ratio of maltitol and maltitol syrup in the recipe for muesli bars for diabetic nutrition.

Development of waffle with fat filling using unconventional vegetable raw materials

The object of research: technology for the production of waffles of increased consumer value with a fat filling using non-traditional plant raw materials.
 Investigated problem: the problem of the production of new waffles is solved by using a mixture of vegetable-butter and coconut oil, dry skim milk, carob powder, apple powder, cinnamon and ascorbic acid.
 Main scientific results: The use of non-traditional raw materials in the fatty filling of waffles increases the organoleptic properties of the products. Waffles have a pleasant taste and aroma due to the content of carob powder, apple powder and cinnamon in the filling. Due to the introduction of unconventional raw materials and herbal additives into the formulations of new products, the amount of total sugars was reduced. The mass fraction of fat also decreased due to the replacement of confectionery fat for waffle fillings with a vegetable-butter mixture and coconut oil. The moisture content of new samples of waffles and waffle sheets is within the established norms. It was found that the finished waffles meet the requirements of the state standard for physical and chemical indicators. The developed score helped to establish that the quality level of the developed waffles is 0.97.
 The area of practical use of the research results: food industry enterprises specializing in the production of confectionery.
 An innovative technological product: the technology for the production of waffles with a fat filling using non-traditional plant raw materials makes it possible to obtain a new confectionery product of increased consumer value with a balanced composition and high organoleptic properties.
 Scope of application of the innovative technological product: confectionery production of dietary products

High stearic sunflower oil: Latest advances and applications

Regular sunflower oil is rich in linoleic acid. To improve its properties for different applications several genotypes with modified fatty acid compositions have been developed. Amongst them, the most remarkable have been high oleic and high stearic types. High stearic sunflower lines reported to date have been produced by traditional methods of breeding and mutagenesis. The mutations affected the expression of enzymes responsible for stearate desaturation in developing seeds. This trait has been combined with standard and high oleic backgrounds, giving high stearic lines with high contents of linoleic or oleic acids and thus different physical properties, increasing their functionality and potential applications. Nevertheless, for applications requiring plastic or confectionery fats, the oils have to be fractionated to obtain derived fats and butters with higher levels of solids. In the present review we present recent advances for the above mentioned topics related to high stearic sunflower oils.

Effect of functional and technological properties of vegetable shortenings on qualitative characteristics of biscuit

The modern market has strict requirements for competitive products, forcing the manufacturer to implement scientific and technological progress in production, increase labor productivity and product quality, and reduce cost. The unchanged favorite on the confectionery market is sugar biscuits, it is in high demand among all groups of the population, the share of domestic products is more than 85 %. The quality and nutritional value of food products largely depend on the properties and composition of the predominant amount of raw materials, which in the production of sugar cookies are wheat flour, sugar and fat component. In order to update the technological control schemes and optimize the recipe composition of sugar cookies, depending on the type of fat component used, the influence and the relationship between the functional and technological properties of fatty products traditionally used in the production of sugar cookies (margarine, confectionery fat, milk substitute fat, palm oil), and quality characteristics of finished products (structural and mechanical, physicochemical and organoleptic indicators, rheological indicators of emulsion and dough) have been investigated. As a result of the studies, it has been found that the type of fatty products has a significant impact on the development and optimization of technological methods in relation to specific production conditions, the formation of sensory and structural characteristics of the finished product. Recommendations have been developed for optimizing the recipe composition of cookies depending on the type of fat used. In particular, it has been shown that it is advisable to use a milk fat substitute or margarine in products with a simple recipe composition, while the use of palm oil and confectionery fat is more justified in products with a rich recipe composition, in which organoleptic characteristics are formed by the presence of additional raw materials: dairy products, cocoa powder, nuts, dried fruits, etc.

Chemical Characterization of Sorbitan Tri‐Stearate Commercial Samples and Their Determination in Confectionery Fats by HPLC High‐Resolution Mass Spectrometry

AbstractNominal sorbitan tristearate (E492) commercial samples are widely used generally as emulsifiers and particularly as anti‐bloom agents in confectionery products. In spite of this generalized use, their qualitative and quantitative evaluation is poorly documented in literature and the relative works go back to the last decades of last century. In the present work, a deep study by HPLC‐High Resolution Mass Spectrometry of qualitative composition of five E492 commercial samples was made up showing a very complex pattern of stearic and palmitic acid esters with the sorbitol anhydrides, sorbitan, and isosorbide. A clear distinction of sorbitan mono‐, di‐, tri‐, and tetra‐esters, of sorbitol penta‐ and hexa‐esters and isosorbide mono‐ and di‐esters was achieved. Contemporarily, difference in the qualitative pattern between E492 commercial samples coming from different suppliers was established. As a consequence, quantitative evaluation can be reliably obtained by using as calibration standard the same E492 present in real samples. The accuracy and recovery of the method were determined allowing in this way a reliable application to commercial confectionery products. The detailed knowledge of STS composition may be of great help to orient the synthesis conditions in order to modulate its properties as a function of various experimental necessities.

Trans fat in foods in Iran, South-Eastern Europe, Caucasia and Central Asia: a market basket investigation

Efforts to minimize the intake of industrial trans fat (I-TF) worldwide and thereby decrease the risk of coronary heart disease (CHD) have recently been intensified by the WHO and other organizations. The purpose of this study was to estimate the amounts of I-TF in biscuits, cakes and wafers in Iran, Turkey and Greece and to examine the recent changes made to these food products in some of the countries of the former Soviet Union and the former Yugoslavia, where these food products were previously investigated for I-TF. Three large supermarkets were visited or revisited in each of the countries’ capitals from 2014 to 2019. Pre-packaged biscuits, cakes and wafers were purchased if the list of ingredients mentioned partially hydrogenated fat or a similar term, including margarine, refined fat or confectionery fat, and the product contained more than 15 g of total fat per 100 g of product. Samples of the foods were subsequently analysed for trans fat (TF).In 84 different products in Iran, TF was between 2% and 5% of total fat. In Turkey, 6 different products had TF between 2% and 5%, and in Greece, 11 products had TF between 2% and 20%. This finding is in stark contrast to the findings of 2% to 50% TF found in 50–100 products in Kazakhstan, Kyrgyzstan, Armenia, Georgia, Serbia, Slovenia, and Croatia in 2014–2015. In the 7 latter countries, there was a 40–80% decline in the presence of TF from 2014/2015 to 2016/2019, but the findings indicate that in 2018/2019, high amounts of TF were still present in popular foods in some of these countries.

DEVELOPMENT OF A FATTY FILLER RECIPE FOR A NEW TYPE OF WAFER PRODUCTS

The article gives an opportunity to develop the technology of fatty filling for waffles and low-calorie wafers by replacing sugar with a mixture of sweet extracts from the leaves of stevia with erythritol. The expediency of regulating the amount of dry matter due to the introduction of dry skim milk whey has been proved. The whey is a raw material component that further enriches the finished product on minerals and vitamins that are healthy for the human body. The possibility of additional introduction of of beta-carotene, as a dye and ascorbic acid, as a stabilizer of fatty wafer fillings has been investigated. In order to improve the quality and safety of finished products, the possibility of using in the technology of fatty fillings for wafer products a new type of confectionery fat of domestic production "Fettifil" has been experimentally confirmed.

Industrially produced trans fat in popular foods in 15 countries of the former Soviet Union from 2015 to 2016: a market basket investigation

ObjectiveTo minimise the intake of industrially produced trans fat (I-TF) and decrease the risk of coronary heart disease, several countries have implemented a legislative restriction on I-TF in foods. The...

ЗАМІНА ГІДРОГЕНІЗОВАНИХ ЖИРІВ НА РОСЛИННУ ОЛІЮ У СКЛАДІ БОРОШНЯНИХ КОНДИТЕРСЬКИХ ВИРОБІВ

Urgency of the research. One of the trends in the development of the global confectionery market, which is linked to the care of consumers health, is the development of confectionery that do not contain hydrogenated fats. Their source in confectionery are margarines and confectionery fats, which are made on the basis of vegetable oils, in particular, palm and coconut or low-quality animal fats, which are waste meat and fish processing enterprises. A direct relationship between the increased content of trans-isomers in the products and diseases of the cardiovascular system, impaired metabolic processes, in turn, provokes the development of various diseases has been established. Therefore, search for alternative raw materials to replace the hydrogenated fats in the confectionery composition is a need. Target setting. In the process of searching for these types of raw materials, developers are faced with the problem of stabilizing the properties and quality of confectionery containing vegetable oils, namely, the binding and content of oil in dough and finished products. Most often, for this purpose, food additives of a stabilizing action based on high-molecular compounds - polysaccharides and proteins are used. The use of such additives leads to a departure from the traditional formulation of products, adding to the list of ingredients on the packaging of finished products is often in no way understandable to the consumer by E-codes and names. Actual scientific researches and issues analysis. The latest publications have been reviewed, which disclose the mechanisms of negative effects of trans-fatty acids on human health, which also indicate the need to limit the content of trans fats in food products and which suggest alternative sources of fatty materials for confectionery. Uninvestigated parts of general matters defining. Remains relevant search for ways to stabilize the structure of confectionery products, which contain vegetable oil in its composition, without the use of polysaccharides and protein stabilizers. The research objective. The aim of the study is the development of confectionery recipe without the use of hydrogenated fats. The statement of basic materials. Refined sunflower oil as an alternative to hydrogenated fats in the confectionery was used. To stabilize the dough and finished products, as well as to improve their organoleptic characteristics, potassium bitartrate was introduced into the formulation. The physico-chemical and organoleptic properties of finished products manufactured according to the developed recipe were studied. Conclusions. The proposed prescription composition of the confectionery with the use of vegetable oil in its composition allows to obtain finished products with good physico-chemical and organoleptic quality indicators.

Influence of grape seeds powder on preservation of fats in confectionary glaze

The polyphenol composition of grape seeds powder (GSP) and defatted grape seeds flour (DGSF) in water­alcohol (ethanol, isopropanol) extracts was studied by the chromatographic method. There was established the content of antioxidants, which are present in the form of phenolic acids (gallic, ellagic), stilbenes (resveratrol) and flavonoids, first of all, flavanols (catechin, epicatechin) and flavonols (kaemferol, myricetin, quercetin and its derivative glycosides). It was shown that the total content of polyphenols reaches a maximum size of about 4.5 % in gallic equivalent of the powder weight at the extraction of water­ethanol mixture with ethanol content of 50 % (w/w). The effect of phenolic antioxidants on peroxide (PV) and acid (AV) values of confectionery fats of lauric and non­lauric types in the model systems was studied as the markers of the rancidity formation process. It was proved that thanks to a high content of antioxidants in grape powders, the introduction of these powders in the composition of samples significantly slows down the process of auto­oxidation of fats. It was shown that grape powders as vegetable raw material are more stable in terms of catalyzing the process of fats hydrolysis in confectionery glaze. This is evidenced by the data on the activity of lipase enzyme, the magnitude of which is lower in the samples of grape seeds powders – 1.03 and 1.12 nm 3 /g for GSP and DGSF, respectively, compared with that of different samples of cocoa powder – 0.84 and 1.87 nm 3 /g. The study into changes in acid value of the samples also showed that the addition of GSP and DGSF as the source of antioxidants significantly inhibits the process of hydrolysis of fats to free fatty acids. The obtained results have a practical significance for the improvement of the process of confectionary glaze production in the direction of partial substitution of cocoa powder with grape seeds powders. This contributes to the creation of a product with a high nutritional value and which is more resistant to damage as a result of the process of oxidation and hydrolysis of fats

Characterization of Coconut Oil Fractions Obtained from Solvent Fractionation Using Acetone.

This work was aimed to study the solvent fraction of coconut oil (CNO). The fatty acid and triacylglycerol compositions, solid fat content (SFC) and the crystallization properties of CNO and its solid and liquid fractions obtained from fractionation at different conditions were investigated using various techniques. CNO was dissolved in acetone (1:1 w/v) and left to crystallize isothermally at 10°C for 0.5, 1 and 2 h and at 12°C for 2, 3 and 6 h. The solid fractions contained significantly lower contents of saturated fatty acids of ≤ 10 carbon atoms but considerably higher contents of saturated fatty acids with > 12 carbon atoms with respect to those of CNO and the liquid fractions. They also contained higher contents of high-melting triacylglycerol species with carbon number ≥ 38. Because of this, the DSC crystallization onset temperatures and the crystallization peak temperatures of the solid fractions were higher than CNO and the liquid fractions. The SFC values of the solid fractions were significantly higher than CNO at all measuring temperatures before reaching 0% just below the body temperature with the fraction obtained at 12°C for 2 h exhibiting the highest SFC. On the contrary, the SFC values of the liquid fractions were lower than CNO. The crystallization duration exhibited strong influence on the solid fractions. There was no effect on the crystal polymorphic structure possibly because CNO has β'-2 as a stable polymorph. The enhanced SFC of the solid fractions would allow them to find use in food applications where a specific melting temperature is desired such as sophisticated confectionery fats, and the decreased SFC of the liquid fractions would provide them with a higher cold stability which would be useful during extended storage time.