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1.
Georgian Med News ; (311): 163-168, 2021 Feb.
Artículo en Ruso | MEDLINE | ID: mdl-33814412

RESUMEN

The aim of the study was to determine the influence of various drinking liquids on an the dentoalveolar system in rats. The study was carried out on 25 white male rats from the nursery of Krolinfo branch of the Moscow region which were kept in standard vivarium conditions. Age of rats-3-6 months, weight - 150-200 grams. The study was carried out in accordance with the ethical principles of humane treatment of animals, in accordance with the current legislation of the Russian Federation. To assess the effect of consumed fluids, groups of 5 animals of the same sex (males, females) were used. The animals were randomly assigned to groups. Observation of animals was carried out for 6 months, during this period the animals were in conditions of free access to food and as drink received the studied liquids ad libitum. Experimental groups within 3 months received the following types of drink: I (control group) - tap water; The II group - Coca-Cola; The III group - honey water; The IV group - the distilled water; The V group - light water. The results obtained by the authors and the data provided in literature confirm that among the factors that affect the teeth condition, in particular the characteristics of the hardness of enamel and dentin, the use of various sugar-containing drinks, as well as the duration, quantity, and frequency of their use, can play a significant role. These factors remain largely unexplored at present. It is obvious that in order to stop caries, it is necessary to develop and carry out a set of preventive measures, including limiting the consumption of sweets and beverages containing sugar, along with regular dental care and a balanced diet.


Asunto(s)
Bebidas , Animales , Peso Corporal , Femenino , Masculino , Ratas , Federación de Rusia
2.
Food Chem ; 351: 129273, 2021 Jul 30.
Artículo en Inglés | MEDLINE | ID: mdl-33662907

RESUMEN

Heat processing of ready-to-drink beverages is required to ensure a microbiologically safe product, however, this can result in the loss of bioactive compounds responsible for functionality. The objective of this study was to establish the thermal stability of a novel dihydrochalcone, 3',5'-di-ß-d-glucopyranosyl-3-hydroxyphloretin (2), 3',5'-di-ß-d-glucopyranosylphloretin (3) and other Cyclopia subternata phenolic compounds, in model solutions with or without citric acid and ascorbic acid. The solutions were heated at 93, 121 and 135 °C, relevant to pasteurisation, commercial sterilisation and ultra-high temperature (UHT) pasteurisation, respectively. For most compounds, the acids decreased the second order reaction rate constants, up to 27 times. Compound 2 (46.29 ± 0.53 (g/100 g)-1 h-1), and to a lesser extent compound 3 (5.94 ± 0.01 (g/100 g)-1 h-1) were the most thermo-unstable compounds when treated at 135 °C without added acids. Even though differential effects were observed for compounds at different temperatures and formulations, overall, the phenolic compounds were most stable under UHT pasteurisation conditions.


Asunto(s)
Bebidas/análisis , Chalconas/química , Fabaceae/química , Extractos Vegetales/química , Polifenoles/química , Temperatura , Glicosilación , Pasteurización , Fenoles/análisis , Soluciones
4.
Food Chem ; 352: 129312, 2021 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-33652193

RESUMEN

High-value acacia honey is often adulterated with inexpensive high fructose corn syrup (HFCS), due to their similar color and sugar composition. α­Dicarbonyl compounds formed by Maillard reaction or caramelization during heat treatment or storage, differ between HFCS and honey due to differences in starting materials and processing methods. In this study, we compared α-dicarbonyl compounds in acacia honey and HFCS by Ion Mobility-Mass Spectrometry and multivariate statistical analysis. Through α-dicarbonyl compound derivatization with o-phenylenediamine, we screened a marker with 189.1023 m/z and 139.3 Å2 Collision Cross-Section that can distinguish HFCS from acacia honey. Nuclear magnetic resonance spectra identified this marker compound as 3,4-dideoxypentosulose. We then used chromatography-coupled tandem mass spectrometry to quantitate 3,4-dideoxypentosulose in market samples of honey and HFCS and found that 3,4-dideoxypentosulose was negligible (<0.098 mg/kg) in honey, but prevalent in HFCS (≧1.174 mg/kg), indicating 3,4-dideoxypentosulose can serve as an alternative indicator of HFCS adulteration of acacia honey.


Asunto(s)
Acacia/química , Bebidas/análisis , Cromatografía Líquida de Alta Presión , Análisis de los Alimentos/métodos , Jarabe de Maíz Alto en Fructosa/análisis , Espectrometría de Movilidad Iónica , Espectrometría de Masas en Tándem , Calidad de los Alimentos , Fraude/prevención & control
5.
Oral Health Prev Dent ; 19(1): 189-194, 2021 Jan 07.
Artículo en Inglés | MEDLINE | ID: mdl-33723978

RESUMEN

PURPOSE: In 2017, Saudi Arabia introduced a 120% tax on energy drinks and a 50% tax on soft drinks. The impact of this policy on the consumption of sugar-sweetened beverages (SSB) among schoolchildren is not known in this country. The present study evaluated the impact of the excise tax on SSB consumption in the tri-city metropolitan area of Dammam-Khobar-Dhahran, Eastern Province, Saudi Arabia. MATERIALS AND METHODS: A repeated cross-sectional design was used to examine the difference between pre- and post-tax SSBs consumption among schoolchildren (12-14 years old) in Dammam-Khobar-Dhahran cities. A beverage-consumption frequency questionnaire was completed by 453 participants before the tax implementation and 334 participants after the tax implementation. The tax on soft drinks was increased by 50% and on energy drinks by 120%. Pre-tax data were collected in May 2017 and post-tax data in April 2018. RESULTS: The proportion of participants who consumed energy drinks was 46.1% (95% CI: 42-51) before tax implementation, decreasing to 38.4% (95% CI: 33-44) after tax implementation, a reduction of nearly 8%. 92.5% (95% CI: 90-95) of the participants consumed soft drinks before tax implementation and 94.6% (95% CI: 92-97) did so after tax implementation, an increase of about 2%. CONCLUSIONS: The study showed no statistically significant impact of tax implementation on the consumption of energy drinks and soft drinks in this sample of children.


Asunto(s)
Bebidas Azucaradas , Adolescente , Bebidas , Niño , Estudios Transversales , Humanos , Arabia Saudita , Azúcares , Impuestos
7.
Gen Dent ; 69(2): 40-46, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33661113

RESUMEN

The objective of the present study was to assess the influence of energy and hydroelectrolytic beverages on the color stability and fluorescence of composite resins. Three composite resins (Amelogen, Filtek Z350 XT, and Filtek Bulk Fill) were analyzed at 4 different time periods: at baseline (T0) and after 1 (T1), 2 (T2), and 3 (T3) months of storage. Thirty specimens of each material were prepared and divided into subgroups (n = 10) based on the type of solution in which they were immersed for 1 hour a day at 37°C: distilled water (control), Red Bull, and Gatorade. Color stability and fluorescence tests were performed at each timepoint. Three-way repeated-measures analysis of variance (ANOVA) tests were used to evaluate the influences of material, immersion solution, and time on the color stability and fluorescence values (α = 0.05). The Bonferroni test was used as a post hoc test to compare the mean values between the groups (α = 0.05). For color change, ANOVA showed a statistically significant influence of all isolated factors and their interactions. Overall, for all periods of analysis, Amelogen showed significantly higher fluorescence values than the other composite resins after storage in all solutions. In this in vitro study, energy and hydroelectrolytic beverages altered the color stability and fluorescence of the studied materials at all timepoints. The potential for future color alterations should be considered before anterior composite resin restorations are placed in patients who consume high quantities of these beverages.


Asunto(s)
Bebidas , Resinas Compuestas , Bebidas/efectos adversos , Color , Materiales Dentales , Humanos , Ensayo de Materiales , Propiedades de Superficie
8.
Food Chem ; 349: 129160, 2021 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-33550018

RESUMEN

Indigo carmine (IC) dye is hazardous and allergenic for humans even though it has been excessively used in a wide range of industries. Therefore, the quantitative determination of IC is still challenging. Herein, for the first time, we have developed fluorometric and colorimetric dual-mode nanoprobe derived from the ion-pair association complex between the negatively charged IC and positively charged N@C-dots in pH = 3.0. Consequently, the binding between N@C-dots and IC resulted in cyan blue and quenching of N@C-dots fluorescence. The dependence of the fluorescence response on IC concentrations was linear over the range of 0.73-10.0 µM (R2 = 0.9989) with LOD of 0.24 µM. On the other hand, the linearity of the colorimetric method ranged from 9.97 to 80.0 µM (R2 = 0.9986) with LOD of 3.3 µM. The sensor was applied for estimation of IC in fruit juice and soft drink without the need for exhaustive extraction steps.


Asunto(s)
Bebidas/análisis , Carbono/química , Análisis de los Alimentos/métodos , Contaminación de Alimentos/análisis , Carmin de Índigo/análisis , Límite de Detección , Nitrógeno/química , Colorimetría , Fluorometría , Humanos
9.
Food Chem ; 349: 129202, 2021 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-33582540

RESUMEN

In this work, we propose a electrochemical enzyme-free glucose sensor by direct growth of conductive Ni/Co bimetal MOF on carbon cloth [Ni/Co(HHTP)MOF/CC] via a facile hydrothermal method. Due to excellent conductivity between Ni/Co(HHTP)MOF and CC, synergic catalytic effect of Ni and Co elements, the Ni/Co(HHTP)MOF/CC not only provides larger surface area and more effective active sites, but also boosts the charge transports and electro-catalytic performance. Under optimized conditions, the Ni/Co(HHTP)MOF/CC shows excellent activity with a linear range of 0.3 µM-2.312 mM, a low detection limit of 100 nM (S/N = 3), a fast response time of 2 s and a high sensitivity of 3250 µA mM-1 cm-2. Furthermore, the Ni/Co(HHTP)MOF/CC was successfully applied for the detection of glucose in real serum and beverages with competitive performances. This facile and cost-effective method provides a novel strategy for monitoring of glucose in biological and food samples.


Asunto(s)
Bebidas/análisis , Carbono/química , Cobalto/química , Electroquímica/instrumentación , Glucosa/análisis , Estructuras Metalorgánicas/química , Níquel/química , Glucemia/análisis , Catálisis , Conductividad Eléctrica , Humanos , Límite de Detección
10.
Environ Monit Assess ; 193(3): 136, 2021 Feb 18.
Artículo en Inglés | MEDLINE | ID: mdl-33599829

RESUMEN

Ajali River near some beverage industries was assessed. Eleven physicochemical parameters and six heavy metals (copper, zinc, iron, cadmium, chromium, and lead) were analyzed on water and sediment collected from different locations near three beverage industries. Standard methods were used to determine the physicochemical parameters while heavy metals were determined with atomic absorption spectrophotometer. The health risk assessment of the water samples were estimated by calculating the hazard quotient (HQ), total hazard index (THI), and the probability cancer risk (PCR) of the heavy metals. Results showed that the concentrations of some heavy metal and physicochemical properties were slightly impaired compared to permissible standards. However, cadmium in water (0.56-11.34 mg/L) and sediments (2.81-481.40 mg/kg) samples were above the recommended limit, indicating possible cadmium pollution in the study area. The water quality index values showed that some of the sampled locations had poor (53.43-134.90%) water quality. The risk assessment of the water samples revealed that HQ for Cu, Zn, Fe, and Cr were of no probable risk (HQ < 1) while Cd (HQ = 173-438) were of probable risk. THI of the water samples showed probable risk (THI > 1) resulting from the high percentage contribution of Cd (94.13 to 99.95%). The probability carcinogenic risk assessment for adults (Cd-7.14 × 10-2, Cr-1.43 × 10-4) and children (Cd-1.66 × 10-1 and Cr-3.34 × 10-4) were significantly harmful. Even though the presence of these industries could encourage more economic activities in the area, there is need for the relevant agencies to enforce effective treatment and proper management of wastes especially cadmium, to safeguard this water source for the rural dwellers.


Asunto(s)
Metales Pesados , Contaminantes Químicos del Agua , Adulto , Bebidas , Niño , Monitoreo del Ambiente , Sedimentos Geológicos , Humanos , Metales Pesados/análisis , Nigeria , Medición de Riesgo , Ríos , Contaminantes Químicos del Agua/análisis
11.
ACS Appl Mater Interfaces ; 13(1): 1398-1412, 2021 Jan 13.
Artículo en Inglés | MEDLINE | ID: mdl-33398990

RESUMEN

Nanotechnology-based packaging may improve food quality and safety, but packages manufactured with polymer nanocomposites (PNCs) could be a source of human dietary exposure to engineered nanomaterials (ENMs). Previous studies showed that PNCs release ENMs to foods predominantly in a dissolved state, but most of this work used food simulants like dilute acetic acid and water, leaving questions about how substances in real foods may influence exposure. Here, we demonstrate that food and beverage ingredients with reducing properties, like sweeteners, may alter exposure by inducing nanoparticle formation in foods contacting silver nanotechnology-enabled packaging. We incorporated 12.8 ± 1.4 nm silver nanoparticles (AgNPs) into polyethylene and stored media containing reducing ingredients in packages manufactured from this material under accelerated room-temperature and refrigerated conditions. Analysis of the leachates revealed that reducing ingredients increased the total silver transferred to foods contacting PNC packaging (by as much as 7-fold) and also induced the (re)formation of AgNPs from this dissolved silver during storage. AgNP formation was also observed when Ag+ was introduced to solutions of natural and artificial sweeteners (glucose, sucrose, aspartame), commercial beverages (soft drinks, juices, milk), and liquid foods (yogurt, starch slurry), and the amount and morphology of reformed AgNPs depended on the ingredient formulation, silver concentration, storage conditions, and light exposure. These results imply that food and beverage ingredients may influence dietary exposure to nanoparticles when PNCs are used in packaging applications, and the practice of using food simulants may in certain cases underpredict the amount of ENMs likely to be found in foods stored in these materials.


Asunto(s)
Bebidas , Embalaje de Alimentos , Nanopartículas del Metal/química , Plata/química , Animales , Aspartame/química , Frío , Contaminación de Alimentos/análisis , Glucosa/química , Nanopartículas del Metal/análisis , Oxidación-Reducción , Polietileno/química , Plata/análisis , Almidón/química , Sacarosa/química , Edulcorantes/química , Yogur
12.
Food Chem ; 346: 128898, 2021 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-33453579

RESUMEN

In 2016, the European Commission recommended the Member States to monitor the content of Δ9-tetrahydrocannabinol and other cannabinoids in food and feed derived from hemp and in food of animal origin for possible transfer from feed. Thus, the Italian Ministry of Health implemented a monitoring plan. To this aim, nine cannabinoids in beverages and food for human consumption and in feed were determined. The method applied, based on rapid clean-up and LC-MS/MS determination, was previously developed and in-house validated, evaluating the analytical performance in the concentration ranges 2-50 µg/L for beverages, 0.020-0.500 mg/kg for food and 0.100-10.0 mg/kg for feed. Then, it was applied to determine the cannabinoids in 78 food, 16 beverage and 6 feed samples, collected from the Italian market since 2017. The results are herein reported, for evaluation of both product characteristics and compliance to national maximum limits. Some study cases are also described.


Asunto(s)
Alimentación Animal/análisis , Bebidas/análisis , Cromatografía Liquida , Dronabinol/análisis , Análisis de los Alimentos/métodos , Espectrometría de Masas en Tándem , Animales , Cannabis/química , Humanos , Italia
13.
Waste Manag ; 121: 296-330, 2021 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-33406477

RESUMEN

Coffee is one of the most popular beverages in the world, and its popularity is continuously growing, which can be expressed by almost doubling production over the last three decades. Cultivation, processing, roasting, and brewing coffee are known for many years. These processes generate significant amounts of by-products since coffee bean stands for around 50% of the coffee cherry. Therefore, considering the current pro-ecological trends, it is essential to develop the utilization methods for the other 50% of the coffee cherry. Among the possibilities, much attention is drawn to polymer chemistry and technology. This industry branch may efficiently consume different types of lignocellulosic materials to use them as fillers for polymer composites or as intermediate sources of particular chemical compounds. Moreover, due to their chemical composition, coffee industry by-products may be used as additives modifying the oxidation resistance, antimicrobial, or antifungal properties of polymeric materials. These issues should be considered especially important in the case of biodegradable polymers, whose popularity is growing over the last years. This paper summarizes the literature reports related to the generation and composition of the coffee industry by-products, as well as the attempts of their incorporation into polymer technology. Moreover, potential directions of research based on the possibilities offered by the coffee industry by-products are presented.


Asunto(s)
Café , Polímeros , Bebidas , Tecnología
14.
J Chromatogr A ; 1637: 461858, 2021 Jan 25.
Artículo en Inglés | MEDLINE | ID: mdl-33422793

RESUMEN

Synthesised polypyrrole-coated Fe3O4 magnetic nanoparticles have been successfully characterised and applied as sorbent for the magnetic-micro-dispersive solid-phase extraction of eleven phthalic acid esters from jelly and apple-based beverage matrices widely consumed by the population and, especially, by children. Sorbent was synthesised through chemical coprecipitation and subsequently characterised by different techniques. The influence of several parameters on the extraction efficiency was exhaustively evaluated using a step-by-step strategy. The separation and quantification of the selected phthalates were performed by ultra-high performance liquid chromatography coupled to tandem mass spectrometry. The validation of the methodology was carried out for jellies and apple-based beverages, employing dihexyl phthalate-3,4,5,6-d4 as the surrogate standard. Relative recovery values were in the range 70-114% for both matrices and relative standard deviations below 20% were obtained. The limits of quantification of the method were found in the range 0.147-0.416 µg/L. Feasibility of the developed methodology was proved by the analysis of commercialised jelly and apple-based beverage products.


Asunto(s)
Bebidas/análisis , Magnetismo , Malus/química , Ácidos Ftálicos/análisis , Polímeros/química , Pirroles/química , Microextracción en Fase Sólida/métodos , Espectrometría de Masas en Tándem/métodos , Adsorción , Calibración , Cromatografía Líquida de Alta Presión , Humanos , Concentración de Iones de Hidrógeno , Nanopartículas/química , Reproducibilidad de los Resultados , Solventes/química
15.
J Chromatogr A ; 1638: 461886, 2021 Feb 08.
Artículo en Inglés | MEDLINE | ID: mdl-33465586

RESUMEN

Major type of internal can coating used for food and beverages is made from epoxy resins, which contain among their components bisphenol A (BPA) or bisphenol A diglycidyl ether (BADGE). These components can be released and contaminate the food or beverage. There is no specific European legislation for coatings, but there is legislation on specific substances setting migration limits. Many investigations have paid attention to BPA due to its classification as endocrine disruptor, however, few studies are available concerning to other bisphenol analogues that have been used in the manufacture of these resins. To evaluate the presence of this family of compounds, ten cans of beverages were taken as study samples. Firstly, the type of coating was verified using an attenuated total reflectance-FTIR spectrometer to check the type of coating presents in most of the samples examined. A screening method was also performed to investigate potential volatiles from polymeric can coatings of beverages using Purge and Trap (P&T) technique coupled to gas chromatography with mass spectrometry detection (GC-MS). Moreover, a selective analytical method based on high performance liquid chromatography with fluorescence detection (HPLC-FLD) for the simultaneous identification and quantification of thirteen compounds including bisphenol analogues (BPA, BPB, BPC, BPE, BPF, BPG) and BADGEs (BADGE, BADGE.H2O, BADGE.2H2O, BADGE.HCl, BADGE.2HCl, BADGE.H2O.HCl, cyclo-di-BADGE) in the polymeric can coatings and in the beverage samples was applied. In addition, a liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) method was optimized for confirmation purposes. The method showed an adequate linearity (R2 >0.9994) and low detection levels down to 5 µg/L. Cyclo-di-BADGE was detected in all extracts of polymeric coatings. The concentrations ranged from 0.004 to 0.60 mg/dm2. No detectable amounts of bisphenol related compounds were found in any of the beverage samples at levels that may pose a risk to human health, suggesting a low intake of bisphenols from beverages.


Asunto(s)
Bebidas/análisis , Cromatografía/métodos , Polímeros/química , Compuestos de Bencidrilo/análisis , Compuestos de Bencidrilo/química , Dieta , Compuestos Epoxi/química , Resinas Epoxi/química , Cromatografía de Gases y Espectrometría de Masas , Humanos , Fenoles/análisis , Estándares de Referencia , Reproducibilidad de los Resultados , Espectrofotometría Infrarroja , Espectroscopía Infrarroja por Transformada de Fourier , Volatilización
16.
Food Chem ; 347: 129006, 2021 Jun 15.
Artículo en Inglés | MEDLINE | ID: mdl-33472117

RESUMEN

Multilayer bottles consisting of chitosan (CS), microcrystalline cellulose (MCC), whey protein isolate (WPI), and polyethylene terephthalate (PET) were tested as novel materials for packaging and extending shelf life of rosebud beverages. We studied the storage stability at 4 °C, 25 °C, 37 °C, and 55 °C by assessing the physical and biochemical parameters. The results show that multilayer PET bottles had better barrier performance and improved soluble solids content, pH, polyphenol content, color indices, and browning degree in rosebud beverages over the control at all studied temperatures. A shelf life model was established based on the Arrhenius equation, and the number of days when polyphenol contents dropped to <50% of the initial content was defined as the shelf life. Our results highlight the reliability of the prediction model, and we conclude that packaging rosebud beverages in multilayer PET bottles significantly extends the product shelf life, and this benefit was further extended at low temperatures.


Asunto(s)
Bebidas/análisis , Celulosa/química , Quitosano/química , Embalaje de Alimentos/métodos , Tereftalatos Polietilenos/química , Proteína de Suero de Leche/química , Color , Almacenamiento de Alimentos , Concentración de Iones de Hidrógeno , Polifenoles/química , Temperatura
17.
Cad Saude Publica ; 36(12): e00219719, 2021.
Artículo en Portugués | MEDLINE | ID: mdl-33440422

RESUMEN

Sponsorship by ultra-processed food and beverage companies is a common marketing practice in sports, capable of influencing consumers, with unknown effects in Brazil. The study aimed to identify the profile of food and beverage companies sponsoring professional soccer teams in Brazil and to associate the occurrence of this sponsorship with the teams' characteristics. The sample included companies from these industries sponsoring 20 major league soccer teams competing in the Brazilian Championship in 2018. The food companies were identified according to the products based on the NOVA classification, and information was obtained on the number of championships they had won in Copa Libertadores, the Brazilian Championship, and the state championships; time since the club was founded; region of Brazil; number of fans; and revenues from sponsorship/advertising and sale of TV rights. A total of 280 sponsors were identified, with repeat sponsors between teams, of which 11.5% were from the food industry, featuring ultra-processed products (9.4%) and 6.7% of ultra-processed beverages. Sponsorship by ultra-processed producers was more prevalent among teams that had won more championships in the Brazilian National Cup and Copa Libertadores and among those with more fans and higher revenues from sponsorship/advertising and sale of TV rights. The study revealed the significant presence of manufacturers of ultra-processed foods and beverages as soccer team sponsors, especially for the more popular teams that had won more championships, thus posing an obstacle to the promotion of healthy eating.


Asunto(s)
Fútbol , Publicidad , Bebidas , Brasil , Dieta Saludable , Alimentos , Industria de Alimentos , Humanos
18.
Food Chem ; 347: 129075, 2021 Jun 15.
Artículo en Inglés | MEDLINE | ID: mdl-33493838

RESUMEN

A novel magnetic covalent organic framework (NH2-Fe3O4@COF) was prepared using a simple room-temperature synthesis in this study. These magnetic particles exhibited high adsorption performance with short adsorption time (10 min) for six benzoylurea insecticides (BUs) as magnetic solid-phase extraction (MSPE) adsorbents. Quantum chemistry calculation demonstrated that adsorption mechanism was primarily attributed to strong halogen bonds between electronegative O atoms of COF and electropositive F atoms of BUs as well as potential hydrophobic effect. Wide linearities (10-1000 ng·L-1) and low limits of detection (0.06-1.65 ng·L-1) for six analytes were obtained via liquid chromatography-tandem mass spectrometry. Applicability of the proposed method was further evaluated by analyzing four kinds of original tea beverages. Recoveries of six BUs in spiked samples ranged from 80.1% to 108.4%.


Asunto(s)
Bebidas/análisis , Estructuras Metalorgánicas/química , Residuos de Plaguicidas/análisis , Compuestos de Fenilurea/análisis , Microextracción en Fase Sólida/métodos , Espectrometría de Masas en Tándem/métodos , Té/química , Adsorción , Cromatografía Líquida de Alta Presión , Teoría Funcional de la Densidad , Interacciones Hidrofóbicas e Hidrofílicas , Límite de Detección , Magnetismo , Residuos de Plaguicidas/aislamiento & purificación , Té/metabolismo , Temperatura
19.
Int J Food Microbiol ; 339: 109034, 2021 Feb 02.
Artículo en Inglés | MEDLINE | ID: mdl-33388710

RESUMEN

Increasing consumer demand for high-quality foods has driven adoption by the food industry of non-thermal technologies such as high pressure processing (HPP). The technology is employed as a post-packaging treatment step for inactivation of vegetative microorganisms. In order to evaluate HPP inactivation of Escherichia coli O157:H7, Salmonella enterica, and Listeria monocytogenes in acid and acidified juices and beverages, pressure tolerance parameters were determined using log-linear and Weibull models in pH-adjusted apple juice (pH 4.5) at 5 °C. A commercial processing HPP unit was used. The Weibull model better described the inactivation kinetics of the three tested pathogens. According to estimates from the Weibull model, 1.5, 0.9, and 1.5 min are required at 600 MPa to produce 5-log reductions of E. coli, Salmonella, and L. monocytogenes, respectively, whereas according to the log-linear model, 3.2, 1.8, and 2.1 min are required. The effects of process conditions were verified using commercial products (pH between 3.02 and 4.21). In all tested commercial juices or beverages, greater than 5-log reductions were achieved for all tested pathogens using HPP process conditions of 550 MPa for 1 min. These findings demonstrate that the HPP conditions of 600 MPa for 3 min, typically used by the food industry provide an adequate safety margin for control of relevant vegetative pathogens in acid and acidified juices and beverages (pH < 4.5). Results from this study can be used by food processors to support validation studies and may be useful for the future establishment of safe harbors for the HPP industry.


Asunto(s)
Fenómenos Fisiológicos Bacterianos , Manipulación de Alimentos/métodos , Microbiología de Alimentos/métodos , Jugos de Frutas y Vegetales , Viabilidad Microbiana , Presión , Ácidos , Bebidas/microbiología , Recuento de Colonia Microbiana , Escherichia coli O157/fisiología , Manipulación de Alimentos/normas , Jugos de Frutas y Vegetales/microbiología , Listeria monocytogenes/fisiología , Malus/microbiología , Salmonella enterica/fisiología
20.
Food Chem ; 348: 129102, 2021 Jun 30.
Artículo en Inglés | MEDLINE | ID: mdl-33508599

RESUMEN

The present study aimed to fabricate whey protein isolate (WPI)-sodium alginate (ALG) nanocomplexes for curcumin (CUR) stabilization in a model fat-free beverage. Mass ratio of 5:1 at pH 5.0 in the absence of NaCl was optimized for WPI-ALG nanocomplex fabrication. Mean particle size and zeta-potential of CUR-WPI-ALG nanocomplex was 209.9 nm and -39.1 mV at pH 5.0, respectively. Highest loading amount (LA) of CUR in CUR-WPI-ALG nanocomplex were 15.26 µg/mg. No obvious precipitates were observed for CUR-WPI-ALG nanocomplex under simulated food processing and storage conditions including high sucrose, high NaCl, and thermal treatment at 90 °C for 2 h. Fluorescence results confirmed that the spontaneous interaction between CUR and WPI-ALG nanocomplex was primarily motivated by hydrophobic interaction and hydrogen bonding. Compared with CUR (free), chemical stability (UV light, and heat), and DPPH scavenging capacities of CUR in CUR-WPI-ALG nanocomplex were strikingly improved.


Asunto(s)
Alginatos/química , Bebidas/análisis , Curcumina/química , Proteína de Suero de Leche/química , Concentración de Iones de Hidrógeno , Interacciones Hidrofóbicas e Hidrofílicas , Tamaño de la Partícula , Solubilidad
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