Pulp Content Research Articles

Preparation of Dissolving Pulp by Combined Mechanical and Deep Eutectic Solvent Treatment.

Grasses are potential candidate to replace wood as a raw material for pulping and paper making, and several processes have been developed to produce grass pulp. In this study, wheat straw was used as raw material, and the possibility of sequential treatment with a mechanical method and deep eutectic solvent (DES) to prepare high-quality dissolving pulp was explored. Firstly, the wheat straw was mechanically treated, and then the wheat straw was delignified using a choline chloride-lactic acid deep eutectic solvent. The results showed that the optimal treatment conditions of deep eutectic solvent were 110 °C, 6 h, and a solid-liquid ratio (ratio of pulp to DES) of 1:40. The removal rate of lignin was 82.92%, the glucose content of pulp was increased by 11.42%. The DES recovery rate was further calculated, and the results showed that the DES recovery rate was more than 50% with rotary evaporation. The pulp viscosity after bleaching was 472 mL/g, and the α-cellulose accounted for 81.79%. This treatment has advantages in biomass refining, and the total utilization rate of wheat straw reaches 72%. This study confirmed that combined mechanical and deep eutectic solvent treatment can effectively remove lignin from wheat straw to produce high-quality wheat straw dissolving pulp.

Effect of solvent extraction on the key aroma components of Tamarindus indica L. pulp

The volatile organic components (VOCs) of Tamarindus indica L. (TIL) pulp and the extraction of TIL were analyzed by headspace solid-phase microextraction with gas chromatographymass spectrometry (HS-SPME–GCMS) to characterize key odorants and investigate their changes during solvent extraction (SE). A total of 109 VOCs were identified in TIL pulp. Twenty-two odorants were determined to be key odorants, and 12 differential aroma components were identified using the relative odor activity value (ROAV) method and multivariate statistical analysis. Among these, phenylacetaldehyde, nonanal and phenethyl alcohol were the common key aroma components of four TIL pulps. In addition, the effect of SE on the aroma composition of TIL was analyzed according to changes in the glucose and fructose contents of TIL pulp combined with sensory evaluation. The results showed that SE affected the aroma of TIL pulp, among which the contents of ethyl palmitate, diethyl succinate, 1-tetradecene, 1-hexadecene, heptadecane, ethyl phenylacetate, and ethyl oleate showed significant differences before and after extraction. The present research refines the existing aroma composition system of TIL and provides a reference for further development and utilization of TIL.

Characteristics of Argopuro Robusta Coffee with Processing Methods Honey Process and Pineapple Addition

This study aims to determine the physical quality characteristics and the effect of adding pineapple concentration on the hedonic test of the Robusta Argopuro coffee method honey process. The research method used a completely randomized design with a single factor in 3 treatments using pineapple pulp concentrations (30%, 50%, and 80%) with 3 replications. The results of the study did not find live insects and the appearance of a moldy or rotting odor in the coffee greenbean with a defect value of 9.5 is included in the quality category 1. The seed size test results in a large seed size classification. The water content test produced the highest value of 9.97 at 80% concentration and the lowest 9.33 at 0% concentration and the hedonic test of aroma, color, sweetness, acidity, fruity, bitter, body, aftertaste, balance, and, overall produced the highest values ​​in a row, namely 3.46 at a concentration of 0%; 3.56 at 50% concentration; 3.09 at 80% concentration; 3.22 at 80% concentration. 3.06 at 80% concentration; 3.24 at 50% concentration; 3.20 at 80% concentration; 3.38 at 30% concentration, 3.34 at 80% concentration; and 3.47 at 80% concentration. On the results of the physical quality test of coffee greenbean complies with SNI 01-2907-2008 standard. %. Argopuro robusta coffee brew honey process with the addition of pineapple pulp at a concentration of 80% produced the highest hedonic value.

Transcriptome Analysis Unveiled the Intricate Interplay between Sugar Metabolism and Lipid Biosynthesis in Symplocos paniculate Fruit.

Symplocos paniculate is an oil plant exhibiting tissue-specific variations in oil content and fatty acid composition across the whole fruit (mainly pulp and seed). And its oil synthesis is intricately linked to the accumulation and transformation of sugars. Nevertheless, there remains a dearth of understanding regarding how sugar metabolism impacts oil synthesis in S. paniculate fruit. To unravel the intricate mechanism underlying the impact of sugar metabolism on lipid biosynthesis in S. paniculata fruit, a comparative analysis was conducted on the transcriptome and metabolite content of pulp and seed throughout fruit development. The findings revealed that the impact of sugar metabolism on oil synthesis varied across different stages of fruit development. Notably, during the early fruit developmental stage (from 90 to 120 DAF), pivotal genes involved in sugar metabolism, such as PGK3, PKP1, PDH-E1, MDH, and malQ, along with key genes associated with oil synthesis like KAR, HAD, and PAP were predominantly expressed in the pulp. Consequently, this preferential expression led to earlier accumulation of oil in the pulp tissue compared to the seed. Whereas, during the fruit maturity stage (from 120 DAF to 140 DAF), these genes exhibited a high level of expression in seed, thereby facilitating the rapid and substantial accumulation of seed oil compared to pulp. The sugar metabolism activity in various parts of S. paniculata fruit plays a pivotal role in oil synthesis and is contingent upon the developmental stage. These findings can offer alternative genes for further gene enhancement through molecular biotechnology, thereby augmenting fruit oil yield and altering fatty acid composition.

Fiber Enrichment of 3D Printed Apricot Gel Snacks with Orange By-Products.

Concern about food waste has become a major global concern. The waste generated by the agri-food industry poses an environmental challenge. However, the development of 3D printing technology offers an opportunity to address this problem. By incorporating food waste into inks, it can create personalized food tailored to individual needs. The aim of this study is the valorization of orange by-products (OBP) in 3D printed gels to obtain a final product in the form of a fiber-enriched snack. Gelatin gels were printed with different concentrations of apricot pulp (30, 50, and 70%) and OBP was added. These gels were subjected to a freeze-drying process. The rheology of the gels before and after printing, the printing precision, and the post-treatment of the freeze-dried product, including color, shear force, and the presence of bioactive compounds, were evaluated. The addition of OBP resulted in an increase in the elasticity (997-1242u) of the samples and improved the printability of them. However, an increase in the hardness (173-184u) was observed in the freeze-dried samples. The use of OBP not only improves the printability of the gels but also enables obtaining fiber-enriched snacks, which could contribute to the reduction in food waste and the promotion of healthy and sustainable food.

Next-generation food packaging: Edible bioactive films with alginate, mangaba pulp (Hancornia speciosa), and Saccharomyces boulardii

In recent years, there has been increasing interest in edible films made from biopolymers for food packaging due to their biodegradable, non-toxic, and biocompatible properties. In addition to presenting barrier properties, these films can also carry bioactive compounds such as probiotics, prebiotics, and fruit pulps, which benefit consumers' health. In this context, this research aimed to develop bioactive edible films based on alginate with the addition of mangaba pulp (Hancornia speciosa) and the probiotic yeast Saccharomyces boulardii for application as food packaging material. The films were prepared based on alginate (1.5%), glycerol (0.6 g/g of biopolymer), mangaba pulp (0%–40%), and S. boulardii (9 log CFU/g). The relationship in their properties related to water, physical-mechanical, optical, and thermal was evaluated. Furthermore, the concentration of bioactive compounds, antioxidant activity, and probiotic viability (during storage at 4 and 25 °C) were determined. The addition of S. boulardii reduced the tensile strength, increased the C* and opacity values of the films, and improved barrier properties to ultraviolet and visible light. Adding mangaba pulp improved the films' water-related, tensile, and thermal properties, as the films showed lower water solubility and water vapor permeability and higher thermal stability, tensile strength, and elongation at break. Increasing the concentration of mangaba pulp in the filmogenic solution made the films darker, with yellow tones and more saturated. Furthermore, it incorporated bioactive compounds (carotenoids, vitamin C, and phenolic compounds), increased the antioxidant capacity of the films and improved barrier properties to ultraviolet and visible light. Probiotic cultures could survive at suitable counts (>6 log CFU/g) during film formation and storage (4 °C/45 days or 25 °C/21 days). Thus, these films represent new bioactive carriers with potential applications as food packaging materials.

Physical Attributes of Bael (Aegle marmelos L.) Fruit and Suitability for Commercialization and Processing

The present experiment entitled “Studies on physical attributes of bael (Aegle marmelos L.) fruit suitable for commercialization and processing” was conducted at Horticulture laboratory of the Department of Applied Plant Science during 2011-12. Matured fruits procured from well established bael orchard and investigation was carried out Completely Randomized Block Design with three replications. The observations were recorded on fruit shape, skull colour, pulp colour, fruit weight, skull thickness, fruit length, fruit width, pulp content and seed content. Flattened round fruit shape, greenish skull colour and pale yellow in pulp colour was found in NB-7. Minimum skull thickness 3.10 mm, seed content 2.42 per cent, whereas maximum fruit weight 2.00 kg, fruit length 16.20 cm, fruit width 17.20 cm and pulp content 79.20 per cent was found in cv. Narendra Bael-7. Result indicated that on the basis of physical attributes NB-7 varieties was found best for commercialization and processing.

Sensory Analysis Of Breading Flour From Coconut Pulp

Coconut pulp is waste obtained from the by-products of coconut meat processing whose utilization is still limited. Coconut pulp contains 86.85% carbohydrates, 7.84% fat, 2.15% protein and 63.66% crude fiber. The nutritional content of coconut pulp has the potential to be processed into food products. The study aimed to analyze the use of different drying techniques with the addition of turmeric to the sensory and hedonic qualities of coconut pulp breading flour and its application to risoles. This study was a pure experiment with the Complete Randomized Design (CRD) method. Data were obtained from 5 limited panelists through organoleptic testing. Data were analyzed with ANAVA which showed the highest value trend and data that had significant differences continued with the Duncan test. The results of the best overall coconut pulp breading flour research were in the X3 treatment (dehydrator) covering aspects of aroma 3.27, taste 3.73 and hedonic 3.27, while the results of the best risoles research on average were found in treatment X3 (dehydrator) including color indicators 3.73, taste 3.80 and hedonics 3.33.

Oil Media on Paper: Investigating the Interaction of Cold-Pressed Linseed Oil with Paper Supports with FTIR Analysis.

Previous works of the authors have presented the changes in the optical, mechanical, and chemical properties of the oiled areas of the supports that occur upon ageing due to oil-binder absorption in works of art on paper and printed material. In this framework, transmittance FTIR analysis has indicated that the presence of linseed oil induces the conditions to promote the deterioration of the oil-impregnated areas of the paper supports. However, the analysis of oil-impregnated mock-ups did not provide detailed information about the input of linseed oil formulations and the different types of paper support on the chemical changes that occur upon ageing. This work presents the results of ATR-FTIR and reflectance FTIR, which were used for compensating the previous results, proving indications on the effect of different materials (linseed oil formulations, and cellulosic and lignocellulosic papers) on the development of chemical changes, thus, on the condition of the oiled areas upon ageing. Although linseed oil formulations have a determining effect on the condition of the oiled areas of the support, the paper pulp content appears to have an input to the chemical changes that occur in the system of paper-linseed oil upon ageing. The results presented are more focused on the oil-impregnated mock-ups with cold-pressed linseed oil since results have indicated that this causes more extended changes upon ageing.

Thermal Properties of Acetylated Betung Bamboo (Dendrocalamus asper) Pulp – Polypropylene Biocomposites

Thermal properties are important factors to determine the proper manufacturing, processing, and storing of biocomposites. Therefore, the thermal properties of the biocomposite made from acetylated betung bamboo pulp and polypropylene (PP) were investigated. The biocomposite was manufactured by hot pressing at 180 oC for 2 minutes and the fiber contents of the acetylated bamboo pulp used were 10 and 20% according to PP weight. The influence of acetylation and fiber content of bamboo pulp on the thermal properties of the biocomposite were investigated by using differential scanning calorimeter (DSC) and thermogravimetric analyzer (TGA). The results showed that acetylated bamboo pulp-PP biocomposite’s were higher than its pure and untreated biocomposites. The rate of crystallization growth of the acetylated bamboo pulp-PP biocomposites was faster up to 4.5 fold than pure PP composite. In addition, its acetylated bamboo pulp-PP had higher onset and maximum decomposition temperature than its untreated fiber-PP biocomposites but lower than PP. According to the results, the best thermal properties of biocomposite were obtained by acetylation of bamboo pulp with 10% fiber content.

Studies on Some Physical and Chemical Characters on Diversity of Some Local Jamun (Syzygium cumini Skeels) Genotypes

The experiment was conducted by selecting 15 different jamun genotypes from Sriniketan and adjoining villages (viz. Andrews Pally, Rathindra Pally, Ballavpur, Bahadurpur Pashchim, Sonajhuri) and jamun fruits were brought to record their physical as well as bio-chemical character at laboratory of Department of Horticulture & post-harvest technology. Present study reveals a wide and significant variation in physical and bio-chemical characters of fruits has been observed among 15 different jamun genotypes. Among all genotypes G-14 was superior on the basis of fruit weight (3.16g), fruit diameter (17.46mm), and greater pulp content (2.34g) and average total sugar (16.26%) content. Owing to moderate fruit size (21.89mm in length and 15.64mm in diameter) G-4 genotype is also superior on the basis of higher TSS (25.90⁰B), total sugar (13.65%) and reducing sugar (8.23%). So, the overall findings of the present study conclude that genotypes G-14 and G-4 are superior over the 15 local jamun genotypes.

Physicochemical properties, nutritional value, and antioxidant potential of jackfruit (Artocarpus heterophyllus) pulp and seeds from Cameroon eastern forests.

This work aimed to study the physicochemical, nutritional, and antioxidant characteristics of the pulp and seeds of the jackfruit collected in the East Cameroon region to reduce the malnutrition problems encountered in the said region. To achieve this work, we first administered a survey. We observed that 50 people from Bertoua knew the fruit among the 200 people surveyed. After that, the physicochemical characteristics and nutritional value of Artocarpus heterophyllus pulp and seeds from Bertoua were evaluated. Finally, the antioxidant compounds (total phenolic and flavonoid contents) and the antioxidant activities were evaluated through the DPPH free radical scavenging capacity, the ability to reduce ferric ions, and the hydroxyl radical scavenging ability using the aqueous, ethanolic, and hydro-ethanolic extracts of these samples (pulp and seeds). Results (means ± standard deviation) were obtained in triplicate and analyzed statistically by the analysis of variance (ANOVA) at the 0.05 probability level. The results revealed that the jackfruit pulp has a water content (89.85% ± 0.49) significantly higher than that of seeds (60.075% ± 0.12). The pH of jackfruit pulp (5 ± 0) is significantly lower than that of seeds (6 ± 0). Jackfruit pulp had a carbohydrate content (54.39% ± 0.47) significantly higher than that of seeds (49.01% ± 0.43). The protein content of jackfruit pulp (18.35% ± 0.04) is lower than that of the seeds (21.66% ± 0.31). For mineral content, the maximum contents of K (848 mg/100 g ± 10.34) and Na (69.53 mg/100 g ± 0) were identified in the jackfruit pulp while those of Ca (132 mg/100 g ± 9.42), Mg (43.73 mg/100 g ± 9.12), and P (101.51 mg/100 g ± 4.02) were found in the seeds. However, all extracts possessed both antioxidant compounds (phenols and flavonoids) and antioxidant activities. In conclusion, the jackfruit appears to be a fruit that can improve the nutritional status of the populations of eastern Cameroon.

A comparison of the mineral element content of 70 different varieties of pear fruit (Pyrus ussuriensis) in China.

Pyrus ussuriensis (Maxim.) is a unique pear tree that grows in northern China. The tree has strong cold resistance and can withstand low temperatures from -30 °C to -35 °C. Due to its unique growth environment, its fruit is rich in minerals and has much higher levels of minerals such as K, Ca and Mg than the fruit of Pyrus pyrifolia (Nakai.) and Pyrus bretschneideri (Rehd.) on the market, and many say the ripe fruit tastes better than other varieties. A comprehensive analysis of the characteristics of mineral elements in the fruits of different varieties of P. ussuriensis will provide a valuable scientific basis for the selection, breeding and production of consumer varieties of P. ussuriensis, and provide a more complete understanding of nutritional differences between fruit varieties. In this study, 70 varieties of wild, domesticated and cultivated species of P. ussuriensis from different geographical locations were compared. Targeting four main mineral elements and eight trace mineral elements contained in the fruit, the differences in mineral content in the peel and pulp of different varieties of P. ussuriensis were analyzed, compared and classified using modern microwave digestion ICP-MS. The mineral elements in the fruit of P. ussuriensis generally followed the following content pattern: K > P > Ca > Mg > Na > Al > Fe > Zn > Cu > Cr > Pb > Cd. The mineral element compositions in the peel and pulp of different fruits were also significantly different. The four main mineral elements in the peel were K > Ca > P > Mg, and K > P > Mg > Ca in the pulp. The mineral element content of wild fruit varieties was higher than that of cultivated and domesticated varieties. Correlation analysis results showed that there was a significant positive correlation between K, P and Cu in both the peel and pulp of P. ussuriensis fruit (P < 0. 01). Cluster analysis results showed that the 70 varieties of P. ussuriensis could be divided into three slightly different categories according to the content of the peel or pulp. According to the contents of the fruit peel, these varieties were divided into: (1) varieties with high Na, Mg, P, K, Fe and Zn content, (2) varieties with high Ca content and (3) varieties with medium levels of mineral elements. According to the fruit pulp content, these varieties were divided into: (1) varieties with high Mg, P and K content, (2) varieties with low mineral element content, and (3) varieties with high Na and Ca content. The comprehensive analysis of relevant mineral element content factors showed that 'SSHMSL,' 'QYL,' 'SWSL' and 'ZLTSL-3' were the best varieties, and could be used as the focus varieties of future breeding programs for large-scale pear production.

Optimization of eucalyptus cellulose fiber using response surface methodology: Effects of sulfur content and refining time on the mechanical characteristics of paper pulp

The purpose of this study was to examine the delignification of Eucalyptus camaldulensis fibers by the kraft chemical process using sodium hydroxide and sodium sulfide as fillers. To optimize the levels of factors influencing pulp yield and pulp content, a response surface approach with a central composite plane was used. Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis were used to characterize the structure and thermal properties of cellulose fiber. Then, a dynamometer, a dechirometer, and an eclatometer adamel were used to evaluate the physico-mechanical properties (breaking length, tear resistance, and resistance to burst) of the paste. The results show that FTIR spectroscopy confirmed the structure of the cellulose fiber; the crystallinity index is 76.35%, the maximum degradation temperature is 368 °C and the kinetic energy of activation (75.45 kJ.mol-1) according to thermogravimetric studies. Subsequently, for the predicted optimal pulping conditions, the concentration of NaOH was 18.8% and 13.40% Na2S at 105 °C for 45 min. Finally, the results obtained for the evaluation of the papermaking properties of fibers during refining showed that the breaking length is 34% (2975 m–1958 m) with a sulfide concentration of 0%–30%, respectively, and that when the refining intensity is increased to 45°SR, the rupture length (5997-4088 m) decreases by approximately 31% under the same conditions. Then, the tear strength is 37.5% (53-33.1), the sulfide concentration is 0%–30%, and the refining intensity is 20°SR; the increase in the latter leads to a reduction in the tear index of approximately 19% (50-40.6) under the same conditions. Finally, the bursting index is 38.5% (18.4-11.3) at identical sulphide concentration and refining intensity, but the increase in the latter leads to a slight decrease in the burst index (37.7-23.6) which is about 37.40%. The results suggest that the valorization of Eucalyptus fibers for the production of well-delignified, high-yield, and resistant pulp is a promising approach. This research qualifies eucalyptus fiber as a potential reinforcement in composite materials.

Apple polyphenol biotransformation using probiotics in vitro and dynamic simulated digestion by bionic rats.

The present study investigated the effects of fermentation by Lactobacillus rhamnosus zrx01 (LR-zrx01), Lactobacillus acidophilus zrx02 (LA-zrx02), and Lactobacillus plantarum zrx03 (LP-zrx03), as well as dynamic simulated digestion by bionic rats, on the biotransformation and antioxidant potential of apple polyphenols. Polyphenols were determined by ultra-high-performance liquid chromatography-mass spectrometry, the dynamic simulated digestion of fermented apple pulp was determined by bionic rats, and the antibacterial and antioxidant activities were analyzed. The polyphenol content of apple pulp fermented using the three strains was respectively 1.41, 1.38, and 1.36 times that of non-fermented pulp. The antibacterial activity of apple pulp improved dramatically after fermentation. Moreover, the antioxidant potential of apple pulp increased after fermentation and digestion. After dynamic simulated digestion by bionic rats, the polyphenol content in unfermented and the three fermented groups increased significantly by 1.19, 1.23, 1.20, and 1.19 times compared to that before digestion, respectively. The major polyphenols in each group with obvious changes were epicatechin, rutin, kaempferol, quercetin-3 galactoside, p-coumaric acid, and two unknown substances, 1 and 2. Fermented and digested apple polyphenols showed better biotransformation effects and mostly existed in the form of small molecules, which was conducive to the improvement of polyphenol bioavailability and beneficial to the absorption of active substances by the human body. These findings build a foundation for the development of functional food beverages. © 2023 Society of Chemical Industry.

Evaluation of the antioxidant activity and total phenolic compounds of lychee pulp by different dehydration methods

Fruits and vegetables are major sources of bioactive compounds included in human diet. The objective of the study was to evaluate the antioxidant activity and total phenolic compound content of lychee pulp. Hydroalcoholic extracts were obtained from the pulp (fresh, dried and freeze-dried), and analyzed by in vitro Folin-Ciocalteu, Fast Blue, ABTS+, Beta Carotene and Phosphomolybdenum Complex assays. The color and water activity of the pulp submitted to each dehydration treatment were also evaluated. The results obtained in the determination of total phenolic content did not differ statistically (p&gt;0.05) between dried and freeze-dried pulp. The values obtained for the antioxidant activity by the ABTS+ method and by the phosphomolybdenum complex had a statistically significant difference. The data regarding the percentage of protection by the ?-Carotene/Linoleic Acid method showed that the dried pulp did not differ statistically from the fresh and freeze-dried pulp. However, the freeze-dried pulp presented higher antioxidant activity by the ABTS+ and Phosphomolybdenum Complex assays when compared to the other treatments (fresh and dried pulps).

The study and optimization of the hygroscopic properties of selected natural products with an aim of designing a sanitary pad suitable for low- and middle-income population

This study came into consideration following reported cases of women and girls using unhygienic materials such as old towels to keep themselves dry during their menses. The materials can be improved in quality and usability. The polymer that replaced wood pulp is not environmentally friendly. Water hyacinth and maize stalks have proven high absorbency properties, which are from ancient and current research. The objective was to optimize the hydroscopic properties of maize stalk and water hyacinth pulp and subsequent use in the design of sanitary pad. The methodology was done according to the standard KS 507:2005. The process of extraction was done using the alkaline method, and rinsing was done to remove excess NaOH. The pulp was studied for hydroscopic properties that included the retention capacity, absorbency rate and moisture content followed by the design of the sanitary pad. The absorbency rate and the retention capacity of maize are 50% and 150 s, respectively. The absorbency properties of maize internal tissue pulp are high, and it is feasibly viable. The retention and moisture content indicate over 50% and 57%, respectively. Water hyacinth pulp has a high absorbency rate (106 s). Also, the water retention and moisture content of water hyacinth pulp is over 50% and 59%, respectively. Upon blending, the water retained and held, and absorption rate improved to 50% in 24 h, 50% (25 ml) and 2 min. The significance levels for absorbency were 15 ml to 40 ml per minute and it holds and retains up to 500 times its weight.

Influence of mango pulp and sucrose contents on the technological properties of solid preparations (freeze-dried) for yoghurt

This study analyzed solid preparations (freeze-dried) for yoghurt (SPY) to infer about the balance between healthiness and desirable sensory characteristics associated with the addition of sugar in this potential food matrix. Effect of the factors (mango pulp and sucrose contents) on the technological properties of seven formulations was investigated at three levels (4, 8, and 12%) under experimental design matrix. Ash, lipids, proteins, and energy value increased (p < 0.05) with decreasing sugar and mango pulp contents, possibly because of the higher content of pasteurized milk. The formulation with the highest sucrose and mango pulp contents (F4, 12%) had the highest carbohydrate content (80.97%). The most influential factor for technological properties of SPY was sucrose content, although mango pulp increased potassium content and acted effectively on pigmentation and color quality. Formulations with high mango pulp contents (8 and 12%) had better flowability and fluidity. Given the high solubility and hygroscopicity of SPY, it is suggested to use laminated packaging for adequate transport and storage of the final product. Thus, it is inferred that it is possible to develop dairy products with high potential by being nutritious, healthy and with lower sucrose contents.

Impact of Apricot Pulp Concentration on Cylindrical Gel 3D Printing.

The process of 3D food printing is a rapidly growing field that involves the use of specialized 3D printers to produce food items with complex shapes and textures. This technology allows the creation of customized, nutritionally balanced meals on demand. The objective of this study was to evaluate the effect of apricot pulp content on printability. Additionally, the degradation of bioactive compounds of gels before and after printing was evaluated to analyze the effect of the process. For this proposal, physicochemical properties, extrudability, rheology, image analysis, Texture Profile Analysis (TPA), and bioactive compounds content were evaluated. The rheological parameters lead to higher mechanical strength and, thus, a decrease in elastic behavior before and after 3D printing as the pulp content increases. An increase in strength was observed when the pulp content increased; thus, sample gels with 70% apricot pulp were more rigid and presented better buildability (were more stable in their dimensions). On the other hand, a significant (p < 0.05) degradation of total carotenoid content after printing was observed in all samples. From the results obtained, it can be said that the gel with 70% apricot pulp food ink was the best sample in terms of printability and stability.

Productive qualities of bull-calves of beef and joint breeds

This article presents the results of a study on the search and development of the most optimal breed for beef production and growing technology using fattening and fattening in the conditions of the Karachay-Cherkess Republic. An experiment was conducted at Hammer LLC, the object of which was the bulls of the Aberdeen-Angus, Swiss and Kalmyk breeds bred in the region. From birth to 18 months of age, bull-calves of all breeds were distinguished by high payment for feed by increments. They spent 5.4-6 feed units per kilogram of growth. The feed fed to one bull for 18 months of rearing contained 2918-3235 feed. units and 295-325 kg of digestible protein. Live weight at the age of 18 months in bulls of the Aberdeen-Angus breed was 589.4 kg, which is more by 28.4 and 68.4 kg than in bulls of Swiss and Kalmyk breeds, respectively. The slaughter yield in young animals of all breeds was high from 60.1 to 61.6%. However, heavier carcasses were obtained from bulls of the Aberdeen-Angus breed, which is higher than that of Swiss and Kalmyk bulls by 6% and 12.9% at 18 months, respectively. The calorie content of carcass pulp in animals of all breeds was quite high (2274-2346 kcal at the age of 15.5 months and 2470-2700 kcal at 18 months).When determining the economic efficiency of growing bulls up to 15.5 and 18 months of age, it was revealed that the highest payment for feed was shown by animals of the Aberdeen Angus breed, which spent 11.1 per 1 kg of live weight gain for 15.5 and 18 months of growing, respectively.and 10.7 feed units. At the same time, the Aberdeen Angus breed had the minimum production costs per unit of production. In bulls at the age of 15.5 months, they were 5.3 and 17.0% lower than in Swiss and Kalmyk cattle, and at the age of 18 months, they were 11.1 and 20.3% lower, respectively.