Mass Fraction Of Acid Research Articles

Reactivity of Formaldehyde during 4-Hydroxy-2-butanone Synthesis in Supercritical State.

4-Hydroxy-2-butanone, an important intermediate for vitamin A and fragrances, is usually produced by aldol condensation of acetone and formaldehyde. Noncatalytic synthesis of 4-hydroxy-2-butanone in supercritical state, which was fast and had high production yield, was widely applied. Previous research on 4-hydroxy-2-butanone synthesis in the supercritical state focused on the formation and dehydration of 4-hydroxy-2-butanone while ignoring side reactions involving formaldehyde, which were studied in this paper. A reaction pathway of 4-hydroxy-2-butanone supercritical synthesis containing formaldehyde side reactions was proposed. The cross-disproportionation of formaldehyde and formic acid was found to be the main consumption of formic acid. The effects of initial formaldehyde and formic acid mass fractions in the feed on side reactions were studied. Based on the experiments conducted from 523.15 K to 563.15 K and 17 MPa, a kinetic model was suggested. The relative deviations between experimental and simulated data were less than 10%.

HPAEC-PAD analysis for determination of the amino acid profiles in protein fractions from oat flour combined with correction of amino acid loss during hydrolysis

Current derivatization-dependent approaches for amino acid composition analysis of cereal proteins have significant variability due to lack of direct analysis opportunities and loss of amino acids during protein-hydrolysis. To tackle these drawbacks, a novel direct, derivatization-free approach was successfully introduced, using HPAEC-PAD, and applied for analysis of hydrolyzed defatted oat flour and extracted flour protein fractions. The approach ensured reliable detection of amino acids, including L-tryptophan, as well as oxidation products of L-cysteine and L-methionine. A time course study, analysed by nonlinear least-square regression to determine rates of hydrolysis and loss of each amino acid, allowed comparison of the original mass fraction (AA0) of the respective amino acid in the oat flour mixture with the mass fraction obtained after 24 h hydrolysis (AA24). The difference between (AA0) and (AA24) was less than 0.05%, except for L-arginine (0.61%), glycine (0.14%), L-isoleucine (0.27%), and L-tryptophan (0.17%). The (AA0)s obtained corresponded to literature-data, and fitted with the amino acid composition estimated from deduced proteins encoded in the oat genome, except for L-arginine (27%) and L-glutamic acid/L-glutamine (10%). The amino acid composition estimation from sequence data indirectly confirmed that the high presence of L-arginine observed was a result of co-elution with unknown flour components.

CONTENT AND COMPOSITION OF SUGARS AND ORGANIC ACIDS IN STRAWBERRIES, GROWN IN THE RIGHT-BANK FOREST- STEPPE ZONE OF UKRAINE

Garden strawberry is a valuable berry crop in Ukraine, the harmonious taste of its berries depends on the ratio of sugars and organic acids. Among the factors affecting the quantitative and qualitative composition of sugars and organic acids in berries, the area of cultivation and the pomological variety are distinguished. The article presents the results of studies of strawberry berries of Dukat, Honey and Polka varieties grown in the Right-Bank Forest-Steppe zone of Ukraine for the content and composition of sugars and organic acids using the methods of high-performance liquid chromatography on an Agilent Technologies chromatograph (model 1100) using a carbohydrate chromatographic column size 7,8×300 mm, "Supelcogel-C610H". It was found that the sugar content in strawberry berries of the Dukat, Honey and Polka varieties during the research period ranged from 5.0 to 8.6%. Berries of the Honey variety were distinguished by a significantly higher level of sugars – 8.6%. The content of reducing sugars in berries, according to the average data, was 4.9-7.7%. Among the investigated varieties, Polka berries had the lowest minimum amount of reducing sugars – 3.2%. The mass fraction of fructose was 2.1-4.4%, which is 42.0-51.1% of the sum of sugars, while glucose was 1.1-3.5% (22.0-40.7%) for a small amount of sucrose - 0.3-1.3, which is 6.0-15.1% of the total sugar content in berries. According to the results of the dispersion analysis, no significant influence of the pomological variety of berries on the content of reducing sugars was found. The mass fraction of organic acids in the berries of three strawberry varieties during the research period fluctuated within the limits 0.9-1.4% and significantly depended on the pomological variety of berries. The maximum amount of organic acids was found in Dukat berries - 1.4%. Organic acids in strawberries are represented by citric and malic acids with the dominance of citric acid – 57.0-68.1% of the total acid content. A higher level of citric acid was noted in strawberry berries of the Honey variety, while berries of the Ducat variety were distinguished by the level of apple acid. The sugar-acid index in all studied varieties of strawberry exceeded the value of 5.3, which made it possible to determine the taste of the berries as sweet and sour. In berries of the Dukat variety, it was lower due to the high content of organic acids.

Biological characteristics, bioactive compounds, and antioxidant activities of off-season mulberry fruit.

To understand the yield and quality of off-season mulberry fruits, which are cultivated in open fields from autumn, the biological characteristics, bioactive compounds, and antioxidant activities of them were analyzed. Compared with mulberry fruits in normal season, the fruit length, fruit diameter, single fruit weight, fruit yield per meter strip, and the fruits yield per 667 m2 are significantly lower. The moisture content and juice yield of off-season mulberry fruits are lower than the mulberry fruits in normal season; the pH and soluble solids are higher. The contents of mass fraction of crude protein, total sugar, reducing sugar, total acids, total anthocyanins, and total flavonoids decreased significantly in all batches of off-season mulberry fruits compared with those of normal season. Of off-season mulberry fruits, the contents of glucose, fructose and sucrose, expression, anthocyanin biosynthesis genes, and antioxidant capacity are significantly lower than those in normal season.

Research advances on the treatment of hydrofluoric acid burns

Hydrofluoric acid is a highly dangerous and toxic inorganic acid, which is widely used in industrial fields and daily life. The risk of hydrofluoric acid burns is related to hydrofluoric acid mass fraction, duration of exposure to hydrofluoric acid, burn area, burn depth, and burn site, etc. Hydrofluoric acid has strong toxicity and tissue penetration ability. A small area of hydrofluoric acid burns can cause death in a short time. Therefore, improving the understanding of the mechanism of hydrofluoric acid burns and learning how to treat hydrofluoric acid burns in different sites can further improve the cure rate of hydrofluoric acid burns.

Mass transfer kinetics study for improving the uniform quality of lactic acid marinated pork (longissimus dorsi muscle)

SummaryThe aim of this work was to study the rule of the different concentrations on marination kinetics and mass transfer of lactic acid‐marinated pork (longissimus dorsi muscle) specimens. The marinades of lactic acid concentrations at 0.5%, 1.0%, 1.5%, 2.0%, and 2.5% (w/w) and the marination process was performed at 1, 2, 3, 4, and 5 h, respectively. The water holding capacity (WHC), water and lactic acid content of the pork specimens were measured. Mass transfer kinetic curves were fitted. Kinetic parameter values for changes in total pork mass, the content of water and lactic acid, and effective diffusion coefficient were calculated. The obtained results indicated that the values of kinetic parameters for the changes in total mass, the content of water and lactic acid, and WHC were all increased with lactic acid concentration and marination time raised. The prediction model of water and lactic acid mass transfer in pork had a good linear correlation with marination time. The apparent diffusion coefficient value was the largest and the diffusion rate was the fastest when the mass fraction of lactic acid in the marinade was 1.5%. This research could provide effective parameters for improving the efficiency and uniformly quality of lactic acid marinated meat products.

TOPINAMBOUR MAIN COMPONENTS CONTENT DETERMINATION IN THE PROCESS OF STORAGE VIA ANALYTICAL AND PHYSICOCHEMICAL ANALYSIS METHODS

Paper is devoted to the study of topinambour's biologically active substances through analytical and physico-chemical analysis methods.
 In the course of experiment, content of inulin and vitamins in topinambour was determined, using methods of analytical chemistry, which was: inulin – 65,43 μg/100 g, vitamin C – 100,12 μg/100 g, beta-carotene – 55,26 μg/100 g.
 Change in inulin mass fraction in topinambour's raw material powder during its storage at different temperatures was investigated. During seven months topinambour tubers storing at different temperature conditions, the mass fraction of inulin was larger in altered into powder and dried raw materials - 60 %, then in freezer – 50 % and the smallest mass fraction was in refrigerator – 20 %.
 Сhange in ascorbic acid mass fraction by means of titrimetric analysis method was investigated. A sharp decrease of ascorbic acid content in tuber's powder was observed, it is due to vitamin inactivation under high temperatures in the process of raw materials drying. Content of ascorbic acid in cooled tubers (4 ± 2) °С to the end of shelf-life decreased by 60 %. The best results were obtained in frozen tubers (–20 ± 2) °C, content of ascorbic acid in them has changed 12–15 % compared to control sample.
 Beta-carotene content was determined by photocolorimetric method according to standard methods. Content of β-carotene decreased to a level 12 % by the end of shelf life in topinambour's tuber powder. In frozen tubers (–20 ± 2) °С content of β-carotene was accompanied by a decrease in the mass fraction of β-carotene throughout whole storage period and amounted to 60 %. The best results were obtained in tubers that overwintered in soil, vitamin's mass fraction in them decreased by only 10 %.
 When storing topinambour's tubers at different temperature conditions, proportion of vitamins is the highest in tubers that have overwintered in soil, then in the freezer and the lowest in the refrigerator.
 Recommendations on the method of topinambour's storage with maximum preservation of biologically active substances content were given. 
 Dried topinambour's tuber powder is most suitable for long-term storage with minimal loss of inulin and beta-carotene, which allows to use this powder in the production of therapeutic and prophylactic drugs. 
 When stored at temperatures (–20 ± 2) °C there is a sharp decrease in nutrients in the first two months and a further decrease is very slow. Such storage is expedient if it is necessary to keep tubers for a long time. For example, in production of topinambour's preparations it is necessary to provide а plant with raw materials for the winter. 
 Storage in refrigerator at a temperature of (4 ± 2) °C is advisable for a short period of time. Decrease of inulin and vitamins content is not rapid, in such conditions it can be stored for two months. In the long period, tubers wither and pathogenic microflora begins to develop on them.
 The best indicators in all biologically active substances were stored in tubers that overwintered in the soil. Because the top layer in topinambour does not protect cells from decay processes, these processes are activated during digging, and tubers, that were left in the soil, continue to functionate, so cell apoptosis is not activated.

Biological aspects of cultivation and application of active metabolites of B. subtilis probiotic

Relevance. In modern research, the topic of metabiotics is considered as one of the current directions in the development of probiotics, in the future — as a new class of metabiotics. The article presents the results of studies during the cultivation of the probiotic microorganism B. subtilis in a grain nutrient medium from naked oats, and a scientific and practical substantiation of an experimental probiotic suspension during the formation of microbiocenosis and metabolism of the gastrointestinal tract in early weaning piglets.Methods. As the basis of nutrient media for obtaining metabolites of the probiotic culture of Bacillus subtilis, sprouted and non-sprouted oat grains of the naked variety Nemchinovsky were used at the rate of 100 g of crushed raw material per 3 l of water. The mass fraction of proteinogenic amino acids in experimental probiotic suspensions (EPS) was studied by capillary electrophoresis. The scientific and economic experiment was carried out according to the method of A.I. Ovsyanikov, 1976.Results. In nutrient media based on oats (O, OP), the number of CFU of probiotic microorganisms has a certain variability. The increase in the abundance of B. subtilis CFU continued up to 6 days, in the OP sample it reached 5.8·107 CFU/cm, after what it decreased until 8th day down to 15.5·106 CFU/cm3. At the same time, the synthesis of amino acids is higher compared to control (germinated grain): lysine — in the range of 7.85–10.53 g/l, methionine — 2.03–2.35 g/l, leucine + isoleucine — in the range 5.79– 9.7 g/l. Indicators of protein metabolism are within the physiological norm in piglets of experimental groups. In piglets that received an experimental probiotic suspension, a more pronounced antagonistic effect, during the formation of microbiocenosis, was manifested to conditionally pathogenic bacteriaif they were given B. subtilis, obtained on a medium based on sprouted oats.

THE CHEMICAL COMPOSITION AND NUTRITIONAL VALUE OF BLACKBERRIES GROWING IN THE REPUBLIC OF AZERBAIJAN AND THEIR DEPENDENCE ON THE SPECIES AND REGION OF GROWTH

The work shows the biological and nutritional value of Rubus, which grows in Azerbaijan. It was found that the highest content of sugars is the wild blackberry of the Rubus sanguineus Friv species (8.75±0.19%), while it contains little sucrose, glucose (from 3.10±0.12 to 4.87±0.16%) and fructose (from 3.08±0.28 to 3.40±0.09%) predominate. The content of the mass fraction of organic acids is greater in the species Rubus caucasicus forche (1.94±0.10%) than in the species Rubus caesius and Rubus sanguineus Friv (1.85±0.15 and 1.62±0.12%, respectively). The content of pectin substances in blackberries ranges from 0.26±0.01 to 0.30±0.04%, and the mass fraction of ash from 0.42±0.08 to 0.58±0.11%. In terms of vitamin C content, the species Rubus sanguineus Friv is superior (32.1±1.20 mg/100 g) to the species Rubus caesius and Rubus caucasicus forche (23.76±0.58 mg/100 g and 29.35±0.47 mg/100 g, respectively). In the polyphenol complex of blackberries of the species Rubus sanguineus Friv, Rubus caucasicus forche and Rubus caesius, catechins and anthocyanins are present with a clear predominance of the latter. The results of the studies show that the main indicators of the chemical composition of blackberries depend on the type of raw materials and on the soil-climatic and ecological-geographical conditions of the growing region. The biological and nutritional value of blackberries of various types allows us to consider them as an additional source of physiologically active substances and raw materials for the production of various soft drinks based on them, including tonic energy drinks.

Development of new standards and methods for determining the different features of confectionery products to confirm new products on the market

Methods have been developed for determining the mass fraction of protein, water-soluble vitamins B₁ and B₂, the mass fraction of omega-3 fatty acids, the mass fraction of cholesterol in fat-containing confectionery. Factual data on the content of vitamins B₁ and B₂, omega-3 fatty acids, cholesterol in fat-containing confectionery products have been obtained. It has been established that of the studied samples of sugar cookies, one sample is a source of vitamins B₁, B₂. Of the studied samples of flour confectionery, two samples of oatmeal cookies are a source of omega-3 fatty acids and are characterized by the absence of cholesterol. Based on the developed methods, a methodology has been developed for monitoring the content of vitamins, omega-3 fatty acids, cholesterol in fat-containing confectionery products.

Self-assembly cellulose nanocrystals/SiO2 composite aerogel under freeze-drying: Adsorption towards dye contaminant

Using cheap sodium silicate as raw material, a novel composite aerogel of self-assembled cellulose nanocrystals (CNCs)/SiO2 was successfully prepared by freeze-drying method, which can effectively to adsorb methylene blue (MB) pollutants in water and reduce the burden on the water environment. By investigating the effects of mass fraction of sulfuric acid, hydrolysis temperature, hydrolysis time and liquid–solid ratio on hydrolysis yield, the maximum CNCs yield (74%) obtained from orthogonal experiment was designed. The morphology, important functional groups and key structural elements of the aerogel were characterized by SEM, FTIR and XPS, respectively. Meanwhile, the mesoporous structure of the aerogel was analyzed by BET test, and it was found that its specific surface area could reach 440.715 m2/g. Besides, the adsorption results for MB showed that the Langmuir isotherm model and the pseudo-second order model can better fit the experimental data well with a maximum adsorption capacity of 190.85 mg/g. Adsorption thermodynamics study reveals that the adsorption process is spontaneous and endothermic. Hence, the findings of this research offer a more market application prospect for the composite aerogel, and provide a certain reference basis for the dye wastewater treatment.

Characteristics and Sources of Nitrated Phenols in Atmospheric Fine Particles of Northern Suburban Nanjing

Nitrated phenols are a group of nitrogen-containing organics ubiquitously present in ambient air, which are also important components of atmospheric light-absorbing organic matter (brown carbon) that have significant impacts on climate change, air quality, and human health. In this study, we collected a total of 265 daily filter samples of fine particles (PM2.5) in northern suburban Nanjing from March 2019 to January 2020. We used ultra-high performance liquid chromatography-mass spectrometry (UHPLC-MS) to detect and quantify eight nitrated phenolic species. The results showed that the average annual concentration of total nitrated phenols in the sampling site was 18.77 ng·m-3, and the average concentrations in spring, summer, autumn, and winter were 16.82, 8.59, 17.28, and 44.79 ng·m-3, respectively. Such concentrations were obviously higher than those determined in other countries but were similar to those in domestic cities, such as Jinan. 4-Nitrophenol was the most abundant nitrated phenol, followed by 4-nitrocatechol and 2-methoxy-5-nitrophenol. Correlation analysis showed that 3-nitrosalicylic acid was from a specific source different from that of other species. Finally, we used a positive matrix factorization model to quantify the source contributions of nitrated phenols. The major sources were vehicle emissions (32%), mixed coal and biomass burning emissions (44%), and industrial emissions (24%). The mixed coal and biomass burning emissions were dominant in autumn and winter. The mass fraction of 3-nitrosalicylic acid in the factor of industrial emissions was>90%, consistent with the results of the correlation analysis. Overall, this study provides valuable insights into the understanding of concentrations, characteristics, and sources of atmospheric nitrated phenols in ambient air.

Epidemiological characteristics and treatment outcome analysis of 229 patients with hydrofluoric acid burns in hands

Epidemiological characteristics and treatment outcome analysis of 229 patients with hydrofluoric acid burns in hands

Computational study of the acetic acid extraction process from an aqueous solution with the aid of biological buffer

The liquid-liquid extraction of acetic acid from an aqueous solution with 1-heptanol as an extraction solvent in the extraction column and mixer-decanter at 30°C and atmospheric pressure was simulated using Aspen Plus. A Non-Random Two-Liquid (NRTL) based model was developed by minimizing maximum-likelihood objective function. In the simulation of the extraction column and mixer-decanter, the effect of the number of stages and the flow rate of the solvent on the percent recovery can be seen. In addition, a comparison of the percent recovery value between acetic acid extraction systems using EPPS (4-(2-hydroxyehtyl)-1-piperazine propanesulfonic acid) and HEPES (4-(2-hydroxyethyl)-1 piperazineethanesulfonic acid) buffers was also carried out with systems without buffers. In this study, an economic analysis was also carried out for the acetic acid extraction system using an extraction column and a mixer-decanter. Based on the simulation results, the acetic acid extraction system with the addition of HEPES buffer using extraction column with the number of stages = 8 and solvent to feed mass ratio = 1.6 was the most optimal and efficient extraction process obtained in this study. This system has the capital cost of 180,729,262.67 USD with the percent recovery up to 99.83% and the mass fraction of acetic acid in the raffinate phase is 0.0002 which is also extremely low.

ХАРАКТЕРИСТИКА КОРРЕЛЯЦИОННЫХ СВЯЗЕЙ МЕЖДУ КОМПОНЕНТАМИ МОЛОКА КОЗ МОЛОЧНОГО И КОМБИНИРОВАННОГО НАПРАВЛЕНИЙ ПРОДУКТИВНОСТИ

Dairy goat breeding is developing dynamically in the world and in Russia. To scientifically substantiate the breeding strategy of dairy goats, meat-dairy goats and dairy-meat ones, it is necessary to expand information about the composition of goat milk and the nature of correlations between its components. In the article, the composition of goat milk of dairy goats, meat-dairy goats and dairy-meat ones is considered in the comparative aspect. The correlation coefficients between the indicators studied by infrared spectroscopy and flow cytometry using automatic CombiFoss 7 DC analyzer are presented. It was found that milk of dairy-meat and meat-dairy goats significantly exceeded milk of dairy goats in terms of the mass fraction of fat, protein, levels of saturated and unsaturated fatty acids, lactose and urea. At the same time, the level of differential cells was significantly lower. The nature of the relationship between mass fraction of fat and other components of milk in goats with different severity of milk productivity was the same both in strength and in orientation. A high positive relationship (r = 0.65…0.99) was revealed between the mass fraction of fat and the content of fatty acids, both saturated (SFA, LCFA, MCFA) and unsaturated (MUFA, PUFA, SCFA). Differences in the nature of the relationship between the content of casein and lactose, casein and DSCC were established. For milk of dairy-meat and meat-dairy goats, it was low negative (r = –0.27 and –0.31), for milk of dairy goats – low positive (r = 0.29 and 0.28). Differences were also found between mass fraction of true protein and fatty acids, MDB and the level of somatic cells. Mass fraction of true protein in milk of dairy goats was weakly negatively correlated with LCFA, SCFA, KSK and DSCC (r = –0.16…–0.32), in milk of dairy-meat and meat-dairy goats this relationship was weakly positive (r = 0.14…0.26).

Optimization of Protein Extraction from Tuna Cooking Liquid and Its Property Analysis

In order to provide scientific basis for the comprehensive utilization of high nitrogen waste water from tuna processing industry. Besides, it can provide theoretical guidance for pollution reduction in the industry. On the basis of single factor experiment, the effects of liquid-to-material ratio, temperature, time, pH, and solid content on the ethanol extraction of tuna cooking liquid protein were studied by response surface test. Further, the structure of the extracted protein was characterized by Ultraviolet Scanning, Infrared Spectroscopy, Aamino Acid Analyzer and Circular Dichroism. The results showed that the optimal process conditions were temperature 36 ℃, time 2 h, liquid-to-material ratio 2.4, and the maximum protein extraction rate was 76.83%. The protein extracted by this method had the maximum absorption peak at about 218 nm, but no obvious absorption peak at 280 nm. The amino acid composition showed that the mass fraction of amino acids was 18.79%, and the content of hydroxyproline was 10.21%. The infrared spectrum had the characteristic absorption peak of gelatin. The above results indicate that the protein extracted from the cooking liquid by this process is gelatin.

Development of methods of identification and quantitative determination of active substances in semi-solid dosage forms with sapropel extracts

For use in veterinary medicine for the treatment of the wound process and the prevention of mastitis, the composition and technology of an emulsion-based cream, conventionally called “Saprocream”, has been developed. Clinical trial of the drug “Saprocream” proved its effectiveness and safety for use in the healing of microtraumas, erosions and cracks (wounds) of the udders of cows.
 The aim of the research were was the standardization of the cream under the conventional name “Saprocream” for use in veterinary medicine as a wound healing agent, the development of methods of identification and quantification and their validation.
 Materials and methods. Test samples of emulsion cream type o / v, containing 15 % aqueous extract of sapropel (VES), 10 % oil extract of sapropel (OES), 6 % emulsifier No. 1, 1 % cetylstearyl alcohol, preservatives – 0.01 % nisin, 0.1 % euxil K 100 and purified water up to 100 g were made by phase inversion.
 The methods of pharmacopoeial articles of the European Pharmacopoeia of the 10th edition, SPhU 1.0, as well as industry standards were used to develop methods for identification and quantification of active pharmaceutical ingredients (API) in the developed cream and its standardization.
 Results. The chromatographic profile of the acetone extract from the cream coincides with the chromatographic profile of the reference solution ((PRS) β-carotene), which indicates the presence of substances of carotenoid structure. The absorption spectrum of hexane extraction from the cream in the range from 500 nm to 750 nm has a maximum absorption at a wavelength of 670±2 nm, which coincides with the maximum absorption of hexane solution OES, indicating the presence of chlorophyll.
 A method for quantifying the total mass fraction of humic acids (HA) has been developed and it has been established that the total mass fraction of HA in cream samples with sapropel extracts is 0.828 %.
 The results of the validation of the method show that there is a linear relationship between the concentration of the total mass fraction of HA and the mass of the AES sample with a correlation coefficient of 0.9981 (³ 0.9981). The developed technique is precise, because the value of the relative confidence interval is less than the critical value for the convergence of the results: D %=1.34≤1.60 and the criterion of insignificance of systematic error d=0.51 is fulfilled.
 Conclusions. An emulsion-based cream under the conventional name “Saprocream” has been standardized, methods for identification and quantification of active substances have been developed and validation of the developed methods for use in veterinary medicine as a wound-healing and anti-inflammatory agent has been carried out.

Experimental investigation for the thermal management of a coaxial electrical cable system using a form-stable low temperature phase change material

This novel study was addressed to estimate the affecting rate of phase change materials (PCMs) on the thermal management of co-axial electrical cables applied in various applications. Four independent variables were selected to fulfill the objective based on the previous research studies in the literature on thermal management properties of PCMs and co-axial electrical cable features. Polyvinyl chloride (PVC) density, mass fraction of stearic acid (SA), as the utilized PCM, mass fraction of form-stable phase change material (FSPCM), and cable jacket's thickness were the studied parameters to seek out the intended responses. A melt impregnation method was used to embed the SA into the kaolin, which is used as supporting material to fabricate the aimed FSPCM composites. Besides, to gain a satisfying and precise point of view about the effects of PCM application in electronic cables, it is vital to investigate any possible mechanical properties variation affected by the selected parameters. Accordingly, tensile strength (stress) and elongation were also considered and compared with the expected PVC results. The application of FSPCMs in co-axial electrical cables was led to control and drop of the surface temperature by over 28.47 °C and a 4.62% decrease in cable loss.

Dessert butter

Butter is a leading consumer choice. This is facilitated by its attractive composition and taste, good digestibility, as well as compatibility with almost all food products. However, butter is not recommended by nutritionists for older people due to its high calorie content, increased mass fraction of saturated fatty acids and cholesterol. Some of the consumers of the young and middle generation are almost completely abandoning butter, preferring low-fat products. The diet of a person adhering to a healthy diet should include foods enriched with functional ingredients. The paper proposes a technology for producing butter with barberry berries. Fruits contain carbohydrates, pectin substances, organic acids, macro- and microelements, vitamins, etc. For the production of butter with barberry berries, a method of converting high-fat cream has been chosen. The oil has a high degree of dispersion of moisture and a low content of the gas phase, is less susceptible to bacterial contamination in comparison with the analogue produced by the churning method. The resulting butter can be attributed to the "Dessert" group. Dessert butter was obtained as follows. Dairy and non-dairy raw materials were accepted, their quality was assessed, milk was separated, and the resulting cream was pasteurized. Then, high-fat cream was obtained by secondary separation, and their normalization was carried out. A feature of the production of butter Dessert is the introduction of flavoring components into the normalized mixture - puree from barberry berries and granulated sugar according to the recipe. Further, the normalized mixture was converted into oil and directed to thermostatting. Organoleptic, physicochemical and microbiological indicators of the quality of Dessertnoye butter have been studied. The addition of barberry berries to butter contributes to the enrichment of its composition with vitamins and a decrease in calorie content. The economic efficiency and feasibility of the production of Dessert butter consists in saving the raw milk used by replacing the fatty part with vegetable components.

Numerical Analysis of Urea to Ammonia Conversion in Automotive Selective Catalytic Reduction Realistic Conditions.

The selective catalytic reduction (SCR) is a technology employed for NOx reduction purposes which is based on the injection of an Urea Water Solution (UWS) into the exhaust line. Conversion of this injected urea into ammonia is a key step to ensure high SCR efficiency. In order to study this phenomenon, a three-dimensional model of the urea–water injection process has been created to recreate realistic conditions. A Lagrangian–Eulerian approach has been followed to model liquid and gas phases, respectively. Droplet evaporation as well as relevant chemical processes have been included to recreate the thermolysis and hydrolysis phenomena, and the results have been validated against literature data. Then, the validated model has been applied to recreate an in-house experimental facility that measured spray macroscopic and microscopic characteristics by means of diffused back illumination (DBI) visualization. Probability density functions of the UWS droplet sizes as well as the velocity distributions have been obtained at three different regions of interest to be compared with the experimental data set. Contours of isocyanic acid and ammonia mass fractions have been included to show the chemical transformation from urea into its products. The model accurately replicates the experimental results, and it stands as a good methodology to predict the main spray characteristics as well as the chemical processes that take place in actual SCR systems.