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1.
Crit Rev Food Sci Nutr ; 62(1): 145-159, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-32876475

RESUMO

The lipid phase of infant formulas is generally composed of plant-based lipids structured with a high concentration of palmitic acid (C16:0) esterified at the sn-2 position of triacylglycerol since this structure favors the absorption and metabolism of fatty acids. Palm oil is commonly used to make up the lipid phase of infant formulas due to its high concentration of palmitic acid and solids profile and melting point similar to human milk fat. However, the addition of palm oil to infant formulas has been associated with the presence of 3-monochloropropane-1,2-diol (3-MCPD) esters, a group of glycerol-derived chemical contaminants (1,2,3-propanotriol), potentially toxic, formed during the refining process of vegetable oil. Bovine milk fat obtained from the complex biosynthesis in the mammary gland has potential as a technological alternative to replace palm oil and its fractions for the production of structured lipids to be used in infant formulas. Its application as a substitute is due to its composition and structure, which resembles breast milk fat, and essentially to the preferential distribution pattern of palmitic acids (C16:0) with approximately 85% distributed at the sn-1 and sn-2 position of triacylglycerol. This review will address the relationship between the chemical composition and structure of lipids in infant nutrition, as well as the potential of bovine milk fat as a basis for the production of structured lipids in substitution for the lipid phase of vegetable origin currently used in infant formulas.


Assuntos
Leite Humano , Leite , Animais , Ácidos Graxos , Feminino , Humanos , Lactente , Fórmulas Infantis , Ácido Palmítico , Triglicerídeos
2.
Bioprocess Biosyst Eng ; 43(6): 1105-1118, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32076836

RESUMO

Buriti oil is rich in monounsaturated fatty acids, carotenoids and tocopherols and it is used for the treatment of various diseases. One strategy to restructure the triglycerides is enzymatic interesterification and nanocarriers have been employed to improve the solubility, bioavailability and stability of active compounds. This work aims to investigate the in vitro cytotoxicity of this structured oil in nanoemulsions and nanostructured lipid carriers to expand the applicability of the crude oil. None of the samples had a cytotoxic effect on Caco-2 and HepG2 cell lines at the concentrations tested. Structured lipids acted protecting against oxidative stress and lipid peroxidation. Additionally, no consumption of glutathione has been observed in both cells, and the compounds present in buriti oil are possibly acting as antioxidants. Thus, nanoparticles prepared with interesterified buriti oil had low cytotoxicity and high oxidative stability, with great potential for future applications.


Assuntos
Carotenoides , Portadores de Fármacos , Nanoestruturas , Óleos de Plantas , Células CACO-2 , Carotenoides/química , Carotenoides/farmacologia , Portadores de Fármacos/química , Portadores de Fármacos/farmacologia , Avaliação de Medicamentos , Células Hep G2 , Humanos , Nanoestruturas/química , Nanoestruturas/uso terapêutico , Óleos de Plantas/química , Óleos de Plantas/farmacologia
3.
Food Technol Biotechnol ; 58(2): 159-172, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32831568

RESUMO

RESEARCH BACKGROUND: Emulsion technology is a suitable way of encapsulating, protecting and releasing hydrophobic bioactive compounds for application in food industries, but they are thermodynamically unstable systems. Good results have been achieved for emulsions stabilized by protein-polysaccharide complexes subjected to high-pressure homogenization. Improved stabilization of oil-in-water emulsions results from electrostatic complexes formed between proteins and polysaccharides at pH lower than the protein isoelectric point, which adsorb at the oil-water interface. In addition, polysaccharides contribute to emulsion stability by increasing viscosity of the continuous phase. The aim of this work is to investigate the production of carotenoid-rich buriti oil emulsions using soy protein isolate and high-methoxyl pectin as stabilizers. EXPERIMENTAL APPROACH: Using a rotatable central composite experimental design, we assessed the effects of oil content, soy protein isolate/high-methoxyl pectin ratio and homogenization pressure on the stability, droplet size, electrical conductivity, electrical charge, microstructure and rheological behaviour of the emulsions. RESULTS AND CONCLUSIONS: An optimized emulsion was produced with 28% buriti oil, 55% soy protein isolate, and homogenization pressure of 380·105 Pa. This emulsion was stable for at least seven days, presenting reduced average droplet size, low electrical conductivity and high modulus of negative charges. The mechanical spectra showed that the emulsion behaved as a viscoelastic gel under oscillatory, non-destructive shearing, whereas shear-thinning behaviour took place under steady shear conditions. NOVELTY AND SCIENTIFIC CONTRIBUTION: The optimized buriti oil emulsions stabilized by soy protein isolate and high-methoxyl pectin could be suitable for fat substitution, energy reduction and carotenoid enrichment in food products, such as dairy and bakery products, ice cream, salad sauces and vegetable-based cream.

4.
Food Technol Biotechnol ; 58(3): 284-295, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-33281484

RESUMO

RESEARCH BACKGROUND: Extracted from the pulp of an Amazonian fruit, buriti oil is rich in micronutrients with antioxidant properties and high biological value. The few studies available indicate that this oil could be used in a wide range of applications; however, there are no studies that work on the improvement in the characteristics of this oil for commercial application. The enzymatic interesterification is one of the tools available to improve the properties of oils and fats and our recent studies have demonstrated that the lipase could specifically act on buriti oil to produce structured lipids rich in oleic acid, while preserving most of the minor compounds present in this oil. Still looking for ways to expand the applicability of this raw oil, in this work, we are interested in studying the behaviour of this structured oil in nanostructured lipid carriers (NLCs). EXPERIMENTAL APPROACH: The NLCs were produced with interesterified buriti oil and the stability, droplet size, electrical charge, microstructure, polymorphism and antioxidant activity of the samples were evaluated by ORAC and FRAP methods. RESULTS AND CONCLUSIONS: The results showed that the interesterification formed more unsaturated triacylglycerols (TAGs), and NLCs prepared with interesterified buriti oil had smaller droplets than NLCs with crude buriti oil. Particles remained stable throughout the storage period and NLCs exhibited complex polymorphism with the presence of three crystalline forms. The oxygen radical absorbance capacity (ORAC) value was approx. 23% higher in nanolipid carries with structured lipids than in the nanolipid carriers with crude buriti oil, and the ferric reducing antioxidant power (FRAP) value 16% higher, demonstrating the influence of interesterification on the antioxidant activity of nanocarriers. Thus, NLCs prepared with interesterified buriti oil had small droplets, high stability and antioxidant capacity, and have a potential for nutritional and biological applications. NOVELTY AND SCIENTIFIC CONTRIBUTION: This research showed that interesterification positively influenced the physicochemical properties of NLCs, producing the oil rich in oleic acid, high stability and antioxidant capacity. Therefore, it may be interesting to use these nanocarriers to obtain efficient carrier systems for future applications.

5.
J Food Sci Technol ; 57(9): 3295-3304, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32728278

RESUMO

Droplet size, polydispersity, physical and polymorphic stability of milk fat nanoemulsions produced by hot high-pressure homogenization and stabilized by whey protein isolate (WPI pH 4.0 or 7.0) or sodium caseinate (NaCas pH 7.0) were evaluated for 60 days of storage at 25 °C. Smaller droplets were observed for the NaCas pH 7.0 nanoemulsion, which also showed a lower polydispersity index, resulting in a stable emulsified system for 60 days. On the other hand, the nanoemulsion with bigger droplet size (WPI pH 4.0) showed reduced stability, probably due to the pH near the isoelectric point of the whey proteins. The nanostructured milk fat exhibited the same melting behavior as the bulk milk fat, with a balance between liquid and crystallized fat, and crystals in polymorphic form ß'. This could be an advantage concerning the application of the system for delivery of bioactive compounds and improvement of the sensory properties of fat-based food. In summary, nanoemulsions stabilized by NaCas (pH 7.0) showed higher kinetic stability over the storage time, which from a technological application point of view is a very important factor in the food industry.

6.
J Food Sci Technol ; 55(3): 1104-1115, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29487453

RESUMO

Several scientific investigations have focused on providing new strategies for supporting the development of low saturated and zero trans lipid materials, as healthier fat alternatives for food application. This work evaluated the consistency, crystallization behavior, microstructure and polymorphism of six blends composed of palm and canola oils at different concentrations (100:0, 80:20, 60:40, 40:60, 20:80 and 0:100, in w/w%) added with 5.0% of fully hydrogenated palm oil (FHPO) or with a mixture of 2.5% of FHPO and 2.5% of sorbitan monostearate (SMS). The results were compared with the non-structured blends (standard samples). Through microstructure images, the formation of a more homogeneous and denser packed crystal network was observed for samples added with both crystallization modifiers (FHPO/SMS) compared to the corresponding standard samples, after stabilization at 25 °C during 3 h. In particular, enhanced crystallization modifications were observed for the 40:60 blend, in which the crystal form ß' emerged after the addition of FHPO/SMS. Moreover, the 40:60 blend structured with FHPO/SMS showed increased consistency (from 30 to 658 gF/cm2) and induced onset crystallization in a higher temperature (from 13.1 to 23.9 °C) compared with the non-structured one, due to the specific crystallization effects provided by both added structurants.

7.
J Food Sci Technol ; 54(11): 3391-3403, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-29051634

RESUMO

This work sought to obtain and evaluate zero trans-fat reduced in saturated fatty acids, with higher content of unsaturated fatty acids. Palm oil (PO) was used as the reference of zero trans lipid base. Different amounts of linseed oil (LO) were added to PO, obtaining the following blends: 100:0; 80:20; 60:40; 40:60; 20:80 and 0:100 of PO:LO (w/w%), respectively. These blends were added to fully hydrogenated soybean oil (FHSO) as the crystallization modifying agent, and to sorbitan monostearate (SMS) as the structuring element, both at a proportion of 3% to build the structured fractions. The control and the structured blends were evaluated for fatty acid composition, solid fat content, consistency, crystallization kinetics, thermal behavior, microstructure and polymorphism. With the addition of LO to the PO, an increase of up to 80% was observed in the content of alpha-linolenic acid and a reduction of saturated fatty acids to 47% in the blends. FHSO and SMS offered thermal resistance to the blends, with relevant changes in the crystallization kinetics and microstructure, affecting macroscopic characteristics with the increase in consistence. It was possible to obtain a lipid formulation with features of plasticity and enhanced nutritional quality, compatible with several food applications.

8.
J Food Sci Technol ; 52(12): 8268-75, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26604403

RESUMO

This study showed that enzymatic interesterification of Amazonian oils could be an important tool in order to produce new oils with physicochemical properties that improve the applications of these raw materials. Structured oils of Amazonian patauá oil and palm stearin using two lipases were produced in three different enzymatic systems: first, a crude lipase from the fungus Rhizopus sp (a microorganism isolated in our laboratory); second, a commercial lipase; and third, to check any synergistic effect, a mixture of both lipases (Rhizopus sp and commercial). The lipase from Rhizopus sp was specific in the incorporation of oleic acid at the sn-1,3 positions of the triacylglycerol, resulting in an oil richer in saturated fatty acid in the sn-2 position. This enzyme, produced by solid-state fermentation, even though crude, was fatty acid and positional specific and able to operate at low concentration (2.5 %, w/w). In the second enzyme system, the commercial lipase from Thermomyces lanuginosus was not specific in the tested conditions; there was no change in the distribution of saturated and unsaturated fatty acids in the three positions of the triacylglycerol profile, there was only a replacement by the type of fatty acid at the same position. In the third enzyme system, the mixture of both lipases shows no synergic effect. The structured oils retained the concentration of bioactive α- and γ- tocopherol in the three enzyme systems. Triacylglycerol classes and Thermal behavior tests indicated the formation of more homogeneous triacylglycerols, especially the mono and di-unsaturated.

9.
J Food Sci Technol ; 52(7): 3925-46, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-26139862

RESUMO

Crystallization of fats is a determinant physical event affecting the structure and properties of fat-based products. The stability of these processed foods is regulated by changes in the physical state of fats and alterations in their crystallization behavior. Problems like polymorphic transitions, oil migration, fat bloom development, slow crystallization and formation of crystalline aggregates stand out. The change of the crystallization behavior of lipid systems has been a strategic issue for the processing of foods, aiming at taylor made products, reducing costs, improving quality, and increasing the applicability and stability of different industrial fats. In this connection, advances in understanding the complex mechanisms that govern fat crystallization led to the development of strategies in order to modulate the conventional processes of fat structuration, based on the use of crystallization modifiers. Different components have been evaluated, such as specific triacyglycerols, partial glycerides (monoacylglycerols and diacylglycerols), free fatty acids, phospholipids and emulsifiers. The knowledge and expertise on the influence of these specific additives or minor lipids on the crystallization behavior of fat systems represents a focus of current interest for the industrial processing of oils and fats. This article presents a comprehensive review on the use of crystallization modifiers in lipid systems, especially for palm oil, cocoa butter and general purpose fats, highlighting: i) the removal, addition or fractionation of minor lipids in fat bases; ii) the use of nucleating agents to modify the crystallization process; iii) control of crystallization in lipid bases by using emulsifiers. The addition of these components into lipid systems is discussed in relation to the phenomena of nucleation, crystal growth, morphology, thermal behavior and polymorphism, with the intention of providing the reader with a complete panorama of the associated mechanisms with crystallization of fats and oils.

10.
Food Res Int ; 176: 113821, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38163721

RESUMO

The use of lipids from conventional oils and fats to produce solid lipid nanoparticles (SLN) attracting interest from the food industry, since due their varying compositions directly affects crystallization behavior, stability, and particle sizes (PS) of SLN. Thus, this study aimed evaluate the potential of fully hydrogenated oils (hardfats) with different hydrocarbon chain lengths to produce SLN using different emulsifiers. For that, fully hydrogenated palm kern (FHPkO), palm (FHPO), soybean (FHSO), microalgae (FHMO) and crambe (FHCO) oils were used. Span 60 (S60), soybean lecithin (SL), and whey protein isolate (WPI) were used as emulsifiers. The physicochemical characteristics and crystallization properties of SLN were evaluated during 60 days. Results indicates that the crystallization properties were more influenced by the hardfat used. SLN formulated with FHPkO was more unstable than the others, and hardfats FHPO, FHSO, FHMO, and FHCO exhibited the appropriate characteristics for use to produce SLN. Concerning emulsifiers, S60- based SLN showed high instability, despite the hardfat used. SL-based and WPI-based SLN formulations, showed a great stability, with crystallinity properties suitable for food incorporation.


Assuntos
Lipídeos , Nanopartículas , Lipídeos/química , Óleos , Nanopartículas/química , Lipossomos , Lecitinas , Emulsificantes
11.
Food Chem ; 369: 130943, 2022 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-34469838

RESUMO

This paper addresses sorbitan and sucrose ester in physical transformations of palm mid-fraction (PMF). Both emulsifiers influenced the crystallization properties of PMF, mainly due to emulsifier solubility, which affects its ability to interfere with the kinetics of solution-mediated phase transformations. DSC results corroborate the polymorphism analysis, indicating that the mechanism and rate of phase transformation depend on the chemical structure and amount of each emulsifier. The addition of sorbitan tristearate (STS) and sucrose stearate (S-370) increased the crystallization speed of the PMF and caused changes in the crystallization behavior. STS favored the ß'â†’ß transition, while S-370 stabilized the ß'-form. We can conclude that the presence of emulsifiers dissimilar to the composition of PMF modified its physical structure, either by increasing the liquid fraction or by reducing molecular motion, facilitating or preventing polymorphic transformations.


Assuntos
Estearatos , Sacarose , Cristalização , Hexoses , Óleo de Palmeira , Sacarose/análogos & derivados
12.
Food Sci Technol Int ; 28(1): 3-14, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33455448

RESUMO

The effects of gelled emulsions (GE) used as animal fat replacers in terms of the nutritional, technological, and sensory properties of Bologna sausages during 60 days of chilled storage have been studied. Samples with GE added exhibited a fat reduction of 31%. Sausages with GE had higher values of L* and lower values of a* compared to the control. Harder sausages were obtained by the addition of GE. Higher lipid oxidation rates were found with increasing amounts of GE in the reformulated products. In addition, the relaxation time was not affected by the reformulation. All samples were deemed acceptable by consumer tests. However, CATA (Check-all-that-apply) tests showed that Bolognas formulated with partial or total pork fat replaced with GE were described as rubbery, not very spicy and firm, appeared to be dry and opaque, and had an aftertaste. Chilled storage significantly affected the Thiobarbituric Acid Reactive Substances (TBARS) values and slightly affected the pH values, texture, color, and NMR data. An important result is that the panelists did not detect the oxidation results in relation to the TBARS values, and the addition of a GE with inulin as dietary fiber may be a good strategy to make Bologna sausage healthier.


Assuntos
Inulina , Produtos da Carne , Animais , Fibras na Dieta , Emulsões , Produtos da Carne/análise , Paladar
13.
Food Res Int ; 151: 110897, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34980418

RESUMO

High-fat diets seem to have a negative influence on the development of obesity and the processes associated with low-grade chronic systemic inflammation. In recent years, partial hydrogenated oil, rich in trans isomers, has been associated with deleterious health effects. It has been replaced by interesterified fat (IF). However, there is no evidence whether IF ingestion can exert adverse effects on the intestinal mucosa. Thus, this study aimed to evaluate the effect of IF on the intestinal mucosa of male Swiss mice fed a normal or high-fat diet, focusing on its effects on intestinal permeability and bacterial translocation and its possible damage to the intestinal epithelium. The animals were divided into 4 groups: Control (C) and Interesterified Control (IC) groups (10 En% lipids from unmodified fat or interesterified fat, respectively) and High Fat (HF) and Interesterified High Fat (IHF) groups (45 En% lipids from unmodified fat or interesterified fat, respectively). Compare to C, the IC, HF, and IHF groups presented flattened epithelium, a shorter villi length and a lower percentage of goblet cells, less mucin 2, an increased oxidative stress and more inflammatory cells, higher IL-1ß, IL-17, and IL-23 levels. These groups also presented increased intestinal permeability and gene expression of the protein claudin 2, while JAM-A and claudin 1 gene expression was reduced. IC and IHF increased IL-6 levels while reducing occludin expression. In addition, the IC group also presented a mucosa with lesions of low intensity in the ileum, an increased mucin 5ac, TNF-α levels, and reduced occludin expression in the distal jejunum. Moreover, there was a significant increase in bacterial translocation in the IC group to blood, liver, and lungs, while HF and IHF groups presented bacterial translocation which was restricted to the mesenteric lymph nodes. In summary, our results supported the hypothesis that IF added to a normolipidic diet can be considered harmful or even worse when compared to a HF.


Assuntos
Translocação Bacteriana , Ácidos Graxos , Animais , Dieta Hiperlipídica/efeitos adversos , Expressão Gênica , Masculino , Camundongos , Óleo de Palmeira , Permeabilidade , Proteínas de Junções Íntimas/genética
14.
Food Res Int ; 145: 110387, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-34112390

RESUMO

Single fractionated palm olein (OL) becomes cloudy when submitted to low temperatures. To overcome this technological issue, the use of appropriate additives delays or prevents its clouding. Limonene is considered a green additive, and studies revealed that it modulates fat crystallization. This study evaluated the influence of adding R-(+)-limonene, in different concentrations (1-10%), into OL, regarding its crystallization behavior. The findings show that addition of limonene reduced solid fat content (SFC), crystallization temperature by differential scanning calorimetry (DSC), and cloud point of OL, and the results were more pronounced at higher concentrations of limonene. The blend OL + 10% limonene presented the best resistance in cold stability. From the obtained results, the blends fitted as intermediate products between an OL and a super palm olein (SOL), with substantial improvement in reducing crystals' formation in OL. Limonene can be considered a green anti-crystallizer with potential application in different areas, such as cosmetics and biodiesel.


Assuntos
Limoneno , Varredura Diferencial de Calorimetria , Cristalização , Óleo de Palmeira , Temperatura
15.
Food Res Int ; 147: 110486, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-34399482

RESUMO

Margarines are an expanding market worldwide due to large-scale commercial, lower cost, growth of bakery and confectionery markets, and seasonal independence. The fatty acid composition, solid fat content, consistency, and melting point of the fats used in margarine determine their functional properties. Due to its proven association with increased risk of cardiovascular diseases, the recommendations of the World Health Organization and the enactment of laws in several countries to eliminate industrially produced trans fatty acids (TFA) have resulted in the prohibition or progressive reduction in the use of partially hydrogenated fat. However, issues related to high levels of TFA and saturated fatty acids still constitute a challenge in the formulation of this product category. Current trends on margarine production addition of phytosterols, non-lipid components, organogels, and new interesterified fat bases are reviewed. This review aims to present a historical view and the technological evolution of margarines, including their production processes, formulations, and physical and nutritional characteristics, as well as legislation, and main trends.


Assuntos
Margarina , Ácidos Graxos trans , Gorduras na Dieta , Ácidos Graxos
16.
Food Res Int ; 140: 110036, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33648262

RESUMO

This study aimed to investigate the effect of the addition of organogels in low-fat and high-fat margarines during storage. Margarine formulations were made using water: oil ratios of 65:35 and 40:60 (w/w), and a lipid phase composed of organogel made with soybean oil, candelilla wax, fully hydrogenated palm oil, and mononoacylglycerols. The thermal stability, particle size, consistency, peroxide index, oil exudation, and microstructure of the margarines were evaluated for six months of storage. All margarines showed thermal stability at 35 °C, with no physical destabilization during the period studied. Both low-fat and high-fat margarines presented similar particle size distribution, with d3.3 around units of 5 µm. The peroxide index of the margarines ranged from 1.27 to 5.97 meq O2/Kg after six months of storage. High-fat margarines showed greater hardness and lower spreadability. The amount of water added to the formulations affected the stability, particle size, and texture of the margarines. It was possible to produce margarines with different fat contents and greater health appeal. The margarines with 60% and 35% fat exhibited 12.00 and 8.03% SFA; 32.63 and 18.20% PUFA; and 14.37 and 8.20% MUFA, respectively.


Assuntos
Margarina , Óleo de Soja , Dieta com Restrição de Gorduras
17.
Food Res Int ; 150(Pt A): 110782, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34865797

RESUMO

Structured lipids (SL) containing behenic acid have been produced in order to obtain low-calorie lipids for foods; however, the development of a high nutritional value and a stable nanoemulsion carrier system for these SL is an interesting breakthrough for this field of research, improving technologic and biological potential for food application. In this sense, the aim of this study was to evaluate the stability of a nanoemulsion containing SL NeSL (produced with olive oil, soybean oil and fully hydrogenated crambe oil), the behavior during in vitro digestion and the effects on biomarkers involved in the obesity in cell models. The samples showed good stability throughout storage (30 days) under refrigeration and room temperature and after the gastric digestion phase compared to the controls (nanoemulsion of olive and soybean oil). After the intestinal phase, there was an increase in oil droplet size and zeta potential, a characteristic of coalescence. In the lipid accumulation model in adipocytes, the highest concentration (50 µL/mL) of NeSL resulted in 42% less lipid accumulation, compared to the control. Furthermore, the sample was able to reduce inflammatory cytokines produced by macrophages provoked by LPS (lipopolysaccharide). The combination of the oils in NeSL resulted in a fatty acid profile with beneficial health properties, which may have contributed to less lipid accumulation and improved inflammatory parameters. This SL in the form of a nanoemulsion, may be used as a partial fat substitute in low-calorie food products.


Assuntos
Ingestão de Energia , Óleo de Soja , Biomarcadores , Emulsões , Humanos , Obesidade
18.
Food Res Int ; 132: 109038, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32331672

RESUMO

There is a growing demand for fats that confer structure, control the crystallization behavior, and maintain the polymorphic stability of lipid matrices in foods. In this context, milk fat has the potential to meet this demand due to its unique physicochemical properties. However, its use is limited at temperatures above 34 °C when thermal and mechanical resistance are desired. The addition of vegetable oil hard fats to milk fat can alter its physicochemical properties and increase its technological potential. This study evaluated the chemical composition and the physical properties of lipid bases made with anhydrous milk fat (AMF) and fully hydrogenated soybean oil (FHSBO) at the proportions of 90:10; 80:20; 70:30; 60:40; and 50:50 (% w/w). The increased in FHSBO concentration resulted in blends with higher melting point, which the addition of 10% of FHSBO increase the melting point in 12 °C of the lipid base. Also, FHSBO contributed for a higher thermal resistance conferred by the coexistence of polymorphs ß' and ß, which remained stable for 90 days. Co-crystallization was observed for all blends due to the total compatibility of milk fat with the fully hydrogenated soybean oil. The results suggest a potential of all blends for various technological applications, makes milk fat more appropriate to confer structure, and improve the polymorph stability in foods. The blends presenting singular characteristics according to the desired thermal stability, melting point, and polymorphic habit.


Assuntos
Leite/química , Óleos de Plantas/química , Óleo de Soja/química , Animais , Cristalização , Gorduras na Dieta , Gorduras/análise , Ácidos Graxos , Indústria Alimentícia , Temperatura
19.
Food Res Int ; 131: 109009, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-32247456

RESUMO

The objective of this work was to produce solid lipid microparticles using fully hydrogenated anhydrous milk fat (FHAMF) and to evaluate their physical stability during 90 days of storage at different temperatures. To obtain the lipid microparticles, the FHAMF was sprayed in a double fluid atomizer at 1 bar pressure, in a chilled chamber (2 °C). After atomization, the microparticles were divided into three batches and stored for 90 days at three different temperatures (5, 15 and 25 °C). During storage, samples were periodically removed (7, 15, 30, 60 and 90 days) for evaluation of particle size, melting behavior, morphology, and polymorphic habit. The microparticles presented spherical shaped, with a smooth surface and wide size variation. When stored at 5 °C, the microparticles showed the smaller size and smaller agglomeration, due to the lower liquid fat content in the system, which that makes it difficult the adhesion of one particle to another. The lipid microparticles presented ß' crystals immediately after processing and at all temperatures during the storage. This study demonstrated the potential of FHAMF as an appropriate lipid phase for the production of lipid microparticles, and may contribute to further studies on the delivery of active compounds.


Assuntos
Laticínios/análise , Lipídeos/química , Leite/química , Preservação Biológica/métodos , Animais , Hidrogenação , Nanopartículas/química , Tamanho da Partícula , Secagem por Atomização , Temperatura
20.
Food Res Int ; 137: 109460, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-33233134

RESUMO

Organogels are semi-solid systems where the liquid phase is immobilized for three-dimensional network self-sustained formed by structuring agents capable to hold a larger quantity of liquid oil. The use of these structuring agents or crystallization modifiers, as specific triacylglycerols, emulsifiers and high molecular weight - high melting point lipids, have been recognized as the main alternative for obtaining low saturated fats for food formulation. The aim of this work was to evaluate the crystallization, microstructure and polymorphism properties of hybrid soybean oil (SO) organogels, formulated with 6% (w:w) of structuring agents through a centroid simplex system added singly, in binary or ternary association of candelilla wax (CW), sorbitan monostearate (SMS) and fully hydrogenated palm oil (FHPO). The thermal behavior, crystallization kinetics, physical stability by temperature cyclization, microstructure and polymorphism were evaluated. FHPO and CW increased the stability and ability to form crystalline networks in organogels, while SMS accelerated the crystallization process. The structuring agents increased the initial and final crystallization temperatures, even as the melting temperatures and the enthalpy values of organogels. Time-temperature cyclization (cyclization 1: 5 °C/48 h + 35 °C/24 h + 5 °C/24 h; cyclization 2: 35 °C/48 h + 5 °C/72 h) showed that all the systems resulted in firm and stable organogels, except when SMS or FHPO were used singly. CW promoted formation of denser crystalline networks with higher solids content, quick crystallization onset and higher melting points that indicates adequate thermal resistance; while FHPO increased the solid content although it was effective to obtain organogels only at the cooling temperature (5 °C). The binary interaction of FHPO + CW increased the thermal resistance of organogels; and the interactions among SMS + CW and SMS + CW + FHPO although it was effective to obtain organogels. Regardless of the presence and proportions of structuring agents, organogels were characterized by beta polymorphism.


Assuntos
Emulsificantes , Óleo de Soja , Cristalização , Temperatura , Triglicerídeos
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