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1.
Food Chem X ; 22: 101301, 2024 Jun 30.
Artículo en Inglés | MEDLINE | ID: mdl-38559440

RESUMEN

In this study, liquid chromatography tandem mass spectrometry (LC-MS/MS) was employed to analyze the prevalence of 10 mycotoxins in 140 samples from the Chinese market, aiming to assess the exposure of Chinese individuals to these mycotoxins through the consumption of wine, baijiu, and huangjiu. Mycotoxins were detected in 98% of the samples, with fumonisins (FBs), deoxynivalenol (DON), and zearalenone (ZEN) exhibiting positive rates exceeding 50%. Regarding the exposure of the Chinese population to mycotoxins resulting from alcoholic beverage consumption, fruit wine intake made a relatively significant contribution to aflatoxin exposure, while baijiu showed a relatively significant contribution to ZEN exposure (1.84%). The analysis of the correlation between grape variety, wine region, and mycotoxin content demonstrated that FBs, ZEN, and DON were significantly influenced by grape variety and wine region. This research holds great significance in protecting human life and health, as well as in the production of safer alcoholic beverages.

2.
Food Chem ; 446: 138870, 2024 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-38430771

RESUMEN

Mustard (Brassica spp.) is one of the world's oldest condiments in the food basket, which holds a significant place in the global culinary landscape due to historical prominence and perceived health benefits. This study explores the extraction of oils from Mustard seeds by employing traditional 'Kolhu' method, modern supercritical fluid, and solvent extraction techniques. This study, for the first-time, identified Aurantiamide acetate, a potent anti-cancer dipeptide in Mustard seeds using ultra-performance liquid chromatography-mass spectrometry coupled with quadrupole time-of-flight (UPLC/MS-QToF) analytical platform. The analytical methodology was meticulously validated encompassing optimal parameters such as limit of detection, limit of quantification, precision, accuracy, linearity and robustness, within the range. Interestingly, 'Kolhu' method of oil extraction exhibited better yield of Aurantiamide acetate, suggesting superior efficiency of traditional methods. This study accentuates the importance of classical extraction methods, used traditionally, and emphasizes that naturally occurring substances indeed could be harnessed for better health.


Asunto(s)
Planta de la Mostaza , Espectrometría de Masas en Tándem , Cromatografía Líquida de Alta Presión/métodos , Espectrometría de Masas en Tándem/métodos , Cromatografía Líquida con Espectrometría de Masas , Dipéptidos , Semillas
3.
Biomed Pharmacother ; 168: 115777, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-37913732

RESUMEN

End-stage of liver fibrosis as a precancerous state could lead to cirrhosis and hepatocellular carcinoma which liver transplantation is the only effective treatment. Previous studies have indicated that farnesoid X receptor (FXR) agonists, such as obeticholic acid (OCA) protect against hepatic injuries. However, free OCA administration results in side effects in clinical trials that could be alleviated by applying bio carriers such as MSC-derived exosomes (Exo) with the potential to mimic the biological regenerative effect of their parent cells, as proposed in this study. Loading OCA into the Exo was conducted via water bath sonication. Ex vivo bio distribution studies validated the Exo-loaded OCA more permanently accumulated in the liver. Using CCL4-induced liver fibrosis, we proposed whether Exo isolated from human Warton's Jelly mesenchymal stem cells loaded with a minimal dosage of OCA can facilitate liver recovery. Notably, Exo-loaded OCA exerted additive anti-fibrotic efficacy on histopathological features in CCL4-induced fibrotic mice. Compared to baseline, Exo-mediated delivery OCA results in marked improvements in the fibrotic-related indicators as well as serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) concentrations. Accordingly, the synergistic impact of Exo-loaded OCA as a promising approach is associated with the inactivation of hepatic stellate cells (HSCs), extracellular matrix (ECM) remodeling, and Fxr-Cyp7a1 cascade on CCL4-induced liver fibrosis mice. In conclusion, our data confirmed the additive protective effects of Exo-loaded OCA in fibrotic mice, which suggests a valuable therapeutic strategy to combat liver fibrosis. Furthermore, the use of Exo for accurate drug delivery to the liver tissue can be inspiring.


Asunto(s)
Exosomas , Ratones , Humanos , Animales , Exosomas/metabolismo , Cirrosis Hepática/metabolismo , Hígado , Fibrosis , Transducción de Señal , Matriz Extracelular/metabolismo
4.
Food Chem ; 404(Pt A): 134420, 2023 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-36240564

RESUMEN

The flavor intensity of thermally processed 2­threityl-thiazolidine-4-carboxylic acid (TTCA) was significantly improved to 1.56 times of that generated from MRPs, but its flavor profile was not as desirable as that of fresh MRPs. The synergistic effect between the additional xylose (Xyl) and elevated temperature was proposed and confirmed via the quantitative analyses of regenerative cysteine (Cys) and fragments of deoxyosones (MGO/GO), which reduced the asynchronism between the formation of released Cys from degraded TTCA and retro-aldolisation products of the intermediate deoxyosones. This synergistic effect further enhanced the Strecker degradation of Cys as well as its thermal degradation and thereby promoted the formation of characteristic flavor substances including sulfur-containing compounds and pyrazines, and the total concentrations of TTCA reaction model reached 205.954 µg/L with additional Xyl at 140 °C. Model reaction systems were employed to verify this hypothesis and the proposed mechanism was further elucidated through isotope labeling technique.


Asunto(s)
Cisteína , Xilosa , Reacción de Maillard , Compuestos de Azufre , Temperatura , Azufre
5.
Food Chem ; 399: 133981, 2023 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-36029671

RESUMEN

The main limitation associated with the oral delivery of ascorbyl palmitate, a potent food antioxidant, is its susceptibility to oxidative deterioration. The main objective of the current research was to encapsulate ascorbyl palmitate into corn starch matrix using extrusion cooking and evaluate its release behavior and oxidative stability. Results showed that ascorbyl palmitate was efficiently encapsulated (96.06-99.28%) in the starch matrix using the extrusion technique. The release behavior of ascorbyl palmitate from the extruded starch matrix during simulated upper gastrointestinal tract conditions was slow but steady (18.92-28.32% after 180 min) and presented a sustainable antioxidant activity. Acid treatment (pH 2.0) increased the release rate of ascorbyl palmitate from the extruded starch matrix. Furthermore, the antioxidant capacity of ascorbyl palmitate released from the extruded samples stored in both darkness and under UV radiation at 40 °C was found to be remarkably retained (p > 0.05) for up to three months.


Asunto(s)
Antioxidantes , Almidón , Ácido Ascórbico/análogos & derivados , Culinaria , Zea mays
6.
Food Chem ; 400: 134052, 2023 Jan 30.
Artículo en Inglés | MEDLINE | ID: mdl-36067691

RESUMEN

The perceived health properties of hemp seed oil, as one of the few plant-basedsources of omega-3 and omega-6 fatty acids with an ideal ratio of 1:3, suggest its incorporation in food-grade emulsions to improve its water solubility and oxidative stability. The current research's main aim was nanoemulsification of hemp seed oil using the oil-in-water emulsification method followed by ultrasonication. The entrapment efficiency of the nanoemulsions for antioxidant ascorbyl palmitate and its impact on oxidative stability of the oil was also evaluated. Gum arabic: maltodextrin in 75:25 ratio could result in nanoemulsion with entrapment efficiency of 97.10 % for ascorbyl palmitate and radical scavenging activity of oil-soluble bioactives of 92.13 %. Moreover, incorporation of ascorbyl palmitate could effectively retard the oxidation, specifically in nanoemulsions containing gum Arabic. The optimum formulation of nanoemulsion having an average droplet size of 293 nm can be applied as an ideal vegetarian source of omega-3 fatty acids.


Asunto(s)
Antioxidantes , Ácidos Grasos Omega-3 , Ácido Ascórbico/análogos & derivados , Cannabis , Emulsionantes , Emulsiones , Ácidos Grasos Omega-6 , Goma Arábiga , Extractos Vegetales , Agua
7.
Food Chem ; 400: 134086, 2023 Jan 30.
Artículo en Inglés | MEDLINE | ID: mdl-36075166

RESUMEN

The aim of this study is to determine the levels of deoxynivalenol (DON), HT-2 toxin (HT2), T-2 toxin (T2), and ochratoxin A (OTA) in bee products (bee pollen, propolis, honey and royal jelly) available in Turkey. In addition, exposure and health risk assessments were performed to identify the potential health risk of these mycotoxins. The mycotoxins were analyzed by high-performance liquid chromatography (HPLC) with a UV detector and positive samples were confirmed with liquid chromatography-tandem mass spectrometry (LC-MS/MS). The most common mycotoxins in all bee products were DON and T-2 toxin, with mean concentrations of 1.601 and 0.704 µg/per kg dry sample, respectively, followed by OTA and HT-2 toxin. It was determined that the mycotoxins taken as a result of consuming bee products in specified amounts do not pose a risk to health.


Asunto(s)
Micotoxinas , Própolis , Toxina T-2 , Cromatografía Líquida de Alta Presión/métodos , Cromatografía Liquida , Contaminación de Alimentos/análisis , Micotoxinas/análisis , Medición de Riesgo , Toxina T-2/análogos & derivados , Toxina T-2/análisis , Espectrometría de Masas en Tándem/métodos , Turquía
8.
Food Chem ; 403: 134386, 2023 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-36194933

RESUMEN

A simple and effective approach to remove pesticide residues on vegetables is necessary for food safety. Ozone microbubbles treatment as an eco-friendly washing technique was investigated for three vegetables (celery, pakchoi and cowpea) collected from the field applied with five pesticides. The removal rates of five pesticide residues on cowpea by ozone microbubbles treatment were 15 %-47 % higher than that by ozone macrobubbles. Moreover, compared with the other four systemic pesticides, emamectin benzoate had a preferable removal rate (65 %-94 %) as a non-systemic pesticide with high water solubility. Through Mass Spectrometry (MS), the double-bonded structure of emamectin benzoate made it more possible to be removed chemically, carrying a degradation rate of 88 % at 25 min in water. Additionally, cowpea showed low removal (28 %-65 %) owing to its stomata and rough surface with SEM. Conclusively, this study demonstrated the potential of the ozone microbubble treatment on pesticide residues removal to enhance food safety.


Asunto(s)
Ozono , Residuos de Plaguicidas , Plaguicidas , Vigna , Residuos de Plaguicidas/análisis , Verduras/química , Microburbujas , Ozono/química , Plaguicidas/análisis , Agua/análisis , Contaminación de Alimentos/análisis
9.
Food Chem ; 409: 135222, 2023 May 30.
Artículo en Inglés | MEDLINE | ID: mdl-36586256

RESUMEN

Herein, a novel homemade electrical device was designed, including two pieces of external neodymium magnets, providing a reciprocating magnetic field to introduce a magnetic-assisted dispersive pipette-tip micro solid-phase extraction. To evaluate the performance efficiency of the proposed method, a novel magnetic calcined GO/SiO2@Co-Fe nanocube sorbent was synthesized, filled into the pipette-tip, exposed to the reciprocating magnetic field, and applied for the preconcentration of some hormone therapy drugs in human biological matrices. The effective adsorption and desorption parameters were optimized using a rotatable central composite design and one-variable-at-a-time approaches. Under the optimized conditions, the target analytes' detection limits were found to be below 0.02 ng mL-1. Moreover, the calibration curves were linear in the range of 0.03-500.00 ng mL-1 (R2 > 0.9966), with RSDs% less than 7.8 %. Eventually, the established method was applied to extract the analytes from breast milk samples, followed by LC-ESI-MS/MS analysis.


Asunto(s)
Leche Humana , Espectrometría de Masas en Tándem , Femenino , Humanos , Espectrometría de Masas en Tándem/métodos , Dióxido de Silicio , Cromatografía Liquida , Extracción en Fase Sólida/métodos
10.
Food Chem ; 384: 132520, 2022 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-35217465

RESUMEN

Soybean is a rich source of folates. We optimised the extraction and detection of folates from soybean seeds by HPLC-MS/MS and analysed the folate content and composition of 1074 accessions. Total folate content ranged from 64.51 to 691.24 µg/100 g fresh weight, with 10-fold variation, and 60 elite accessions with over 400 µg/100 g of total folate were identified. The most abundant component was 5-CHO-H4folate, which accounted for an average of 60% of total folate content. Seed-coat colour, seed weight, ecoregion, and accession type significantly affected soybean folate content. Furthermore, 5-CH3-H4folate correlated positively with seed protein (r = 0.24***) and negatively with oil (r = -0.26***). The geographical distribution of folate according to accession origin revealed that accessions from Northeast China contain higher amounts of total folate and 5-CHO-H4folate. This study provides comprehensive and novel insights into the folate profile of soybean, which will benefit soybean breeding for folate enhancement.


Asunto(s)
Glycine max , Espectrometría de Masas en Tándem , Cromatografía Líquida de Alta Presión , Ácido Fólico/análisis , Fitomejoramiento
11.
Food Chem ; 379: 132013, 2022 Jun 15.
Artículo en Inglés | MEDLINE | ID: mdl-35063852

RESUMEN

The dissipation, conversion and risk assessment of bifenazate and bifenazate-diazene in garlic plant were studied by a modified QuEChERS method coupled with UHPLC-MS/MS for the first time. Bifenazate dissipated rapidly in garlic chive and serpent garlic with the half-lives of 3.0-3.9 days and 6.1-6.9 days, respectively. Bifenazate residue on garlic (<0.01 mg/kg) was significantly lower than the other two matrices in the whole growing period, which meant residues in the above-ground part were not transferred to the garlic. Furthermore, garlic chive had higher residues than serpent garlic due to the differences in morphological characteristics. Bifenazate-diazene was easier to convert to bifenazate, with the conversion rates of 93%, 16% and 32% in garlic, serpent garlic and garlic chive extracts, respectively. Additionally, the dietary intake risk for bifenazate was acceptable with RQchronic < 100% according to the international and national assessments.


Asunto(s)
Carbamatos/análisis , Ajo , Hidrazinas/análisis , Residuos de Plaguicidas/análisis , Análisis de los Alimentos , Ajo/química , Medición de Riesgo , Espectrometría de Masas en Tándem
12.
Carbohydr Polym ; 278: 118914, 2022 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-34973733

RESUMEN

A colorimetric cellulose acetate (CA) membrane incorporated with Perilla frutescens (L.) Britt. anthocyanins (PFA) and chamomile essential oil (CO) is developed via electrospinning technique for food freshness monitoring and shelf-life extending. The moieties of PFA and CO are well-dispersed in fiber matrix by hydrogen bonds and their incorporation increases the fiber size but with no obvious influence on the fiber morphology at incorporation levels. The presence of CO enhances membrane hydrophobicity. The target membrane of CA-PFA6-CO15 (PFA6%, CO15%) has a wide color change range of pH 2-12 which is high sensitive and reversible towards external pH-stimuli. The membrane has good antibacterial activity against E. coli and S. aureus besides antioxidant activity. The release of bioactive moieties is predominantly controlled by Fickian diffusion. The target membrane can simultaneously monitor pork freshness in real-time and double the shelf-life at 25 °C, indicating its potential application in active and intelligent food packaging.


Asunto(s)
Antocianinas/química , Antibacterianos/farmacología , Celulosa/análogos & derivados , Manzanilla/química , Aceites Volátiles/química , Perilla frutescens/química , Antibacterianos/química , Celulosa/química , Celulosa/farmacología , Colorimetría , Escherichia coli/efectos de los fármacos , Embalaje de Alimentos , Interacciones Hidrofóbicas e Hidrofílicas , Pruebas de Sensibilidad Microbiana , Staphylococcus aureus/efectos de los fármacos
13.
Food Chem ; 371: 131166, 2022 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-34583178

RESUMEN

Melon juice produces strong cooked off-odors during heat processing, leading to serious deterioration of aroma quality. In this work, the aroma quality of melon juice, the changes in GOD reaction products, and the interactions of reaction products and cooked off-odor components were analyzed by sensory evaluation, gas chromatography-mass spectrometry/olfactory, ultraperformance liquid chromatography-triple quadrupole mass spectrometry, and isothermal titration calorimetry to study the effect mechanism of glucose oxidase (GOD) on the release of cooked off-odor components from heat-treated melon juice. The results showed that GOD treatment improved the aroma quality mainly by controlling off-odor attributes and maintaining characteristic odor attributes. This was because the reaction products (hydrogen peroxide and gluconic acid) of GOD treatment inhibited the release of cooked off-odor components from heat-treated melon juice through oxidation and hydrophobic effects. Furthermore, these products reduced the loss of characteristic odor compounds by restraining Maillard, degradation, and oxidation reactions during heat processing.


Asunto(s)
Cucurbitaceae , Compuestos Orgánicos Volátiles , Cromatografía de Gases y Espectrometría de Masas , Glucosa Oxidasa , Calor , Odorantes/análisis , Compuestos Orgánicos Volátiles/análisis
14.
Food Chem X ; 12: 100170, 2021 Dec 30.
Artículo en Inglés | MEDLINE | ID: mdl-34877530

RESUMEN

Jackfruit (Artocarpus heterophyllus Lam.) is an evergreen tree that produces a high waste of leaves. This study evaluated the obtention of peptides from jackfruit leaves using pancreatin and pepsin, their antifungal activity, and their effect on pectin films. The protein content was 7.64 ± 0.12 g/100 g of jackfruit fresh leaves. Pancreatin produced a higher yield than pepsin in the obtention of peptides (p ≤ 0.05). However, peptides obtained after 2 h by pepsin hydrolysis (Pep-P) had six essential amino acids and inhibited > 99% of mycelial growth and spore germination of Colletotrichum gloeosporioides. Pectin films with Pep-P showed a slight brown color, lower thickness, water vapor permeability, and moisture content, as well as higher thermal stability and better inhibition properties against C. gloeosporioides than pectin films without Pep-P (p ≤ 0.05). Pectin films added with Pep-P from jackfruit leaf could be a green alternative to anthracnose control in tropical fruits.

15.
Pharmacol Res ; 172: 105797, 2021 10.
Artículo en Inglés | MEDLINE | ID: mdl-34352399

RESUMEN

Since both Olfactory ensheathing cells (OECs) and neural stem cells (NSCs) have shown certain efficacy in the cellular therapy of nerve injury and disease, there have been a series of investigations in recent years looking at the co-culture of NSCs and OECs. Protein phosphorylation forms the basis for identifying a variety of cellular signaling pathways responsible for regulating the self-renewal and differentiation of NSCs induced by OECs. To better understand the signaling cascades in the early phases of OEC-induced NSC differentiation, changes in the NSC proteome and phosphoproteome during the first 24 h were determined using dimethyl labeling and TiO2 phosphorylation enrichment coupled with Liquid chromatography-tandem mass spectrometry (LC-MS/MS). A total of 565 proteins and 2511 phosphorylation sites were identified. According to quantitative phosphoproteomics analyses of NSC differentiation induced by OECs during the first 12 and 24 h, it was speculated that there were at least two different signal waves: one peaking within 12 h after stimulation and the second upsurge after 24 h. In addition to understanding the dynamics of the proteome and phosphoproteome in the early stages of NSC differentiation, our analyses identified a key role of the TGF-ß3 protein secreted by OECs, which may be an initiating factor that promotes differentiation of NSCs into neurons induced by OECs. These findings not only redemonstrated a OECs-based therapeutic strategy in cell therapy, but also added a node to the regulatory network for the neural lineage commitment of NSCs induced by OECs.


Asunto(s)
Células-Madre Neurales/metabolismo , Neuroglía , Bulbo Olfatorio/citología , Fosfoproteínas/genética , Proteoma/genética , Animales , Diferenciación Celular , Células Cultivadas , Medios de Cultivo Condicionados , Ratones , Fosfoproteínas/metabolismo , Fosforilación , Mapas de Interacción de Proteínas , Proteómica
16.
Food Chem ; 365: 130528, 2021 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-34325350

RESUMEN

Mango bagasse (MB) is an agro-industrial by-product rich in bioactive polyphenols with potential application as a functional ingredient. This study aimed to delineate the metabolic fate of monomeric/polymeric MB polyphenols subjected to simulated gastrointestinal digestion. The main identified compounds by LC/MS-TOF-ESI were phenolic acids [gallic acid (GA) and derivates, and chlorogenic acid], gallotannins and derivatives [di-GA (DA) and 3GG-to-8GG], benzophenones [galloylated maclurins (MGH, MDH)], flavonoids [Quercetin (Quer) and (QuerH)] and xanthones [mangiferin isomers]. The bioaccessibility depended on the polyphenols' structure, being Quer, 5G to 8G the main drivers. The results suggested that the gastrointestinal fate of MB polyphenols is mainly governed by benzophenones and gallotannins degalloylation and spontaneous xanthone isomerization in vitro to sustain GA bioaccessibility.


Asunto(s)
Mangifera , Antioxidantes , Celulosa , Extractos Vegetales , Polifenoles
17.
Biochem Pharmacol ; 190: 114598, 2021 08.
Artículo en Inglés | MEDLINE | ID: mdl-33979647

RESUMEN

In women globally, breast cancer is responsible for most cancer-related deaths and thus, new effective therapeutic strategies are required to treat this malignancy. Platinum-based compounds like cisplatin are widely used to treat breast cancer, however, they come with limitations such as poor solubility, adverse effects, and drug resistance. To overcome these limitations, complexes containing other platinum group metals such as palladium have been studied and some have already entered clinical trials. Here we investigated the anti-cancer activity of a palladium complex, BTC2, in MCF-7 oestrogen receptor positive (ER+) and MDA-MB-231 triple negative (TN) human breast cancer cells as well as in a human breast cancer xenograft chick embryo model. BTC2 exhibited an average IC50 value of 0.54 µM, a desirable selectivity index of >2, inhibited the migration of ER+ and TN breast cancer cells, and displayed anti-cancer stem cell activity. We demonstrate that BTC2 induced DNA double strand breaks (increased levels of γ-H2AX) and activated the p-ATM/p-CHK2 and p-p38/MAPK pathways resulting in S- and G2/M-phase cell cycle arrests. Importantly, BTC2 sensitised breast cancer cells by triggering the intrinsic (cleaved caspase 9) and extrinsic (cleaved caspase 8) apoptotic as well as necroptotic (p-RIP3 and p-MLKL) cell death pathways and inhibiting autophagy and its pro-survival role. Furthermore, in the xenograft in vivo model, BTC2 displayed limited toxicity and arrested the tumour growth of breast cancer cells over a 9-day period in a manner comparable to that of the positive control drug, paclitaxel. BTC2 thus displayed promising anti-breast cancer activity.


Asunto(s)
Antineoplásicos Fitogénicos/uso terapéutico , Neoplasias de la Mama/tratamiento farmacológico , Células Madre Neoplásicas/efectos de los fármacos , Paladio/uso terapéutico , Animales , Antineoplásicos Fitogénicos/química , Antineoplásicos Fitogénicos/farmacología , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/patología , Embrión de Pollo , Femenino , Humanos , Células MCF-7 , Células Madre Neoplásicas/metabolismo , Células Madre Neoplásicas/patología , Paclitaxel/química , Paclitaxel/farmacología , Paclitaxel/uso terapéutico , Paladio/química , Paladio/farmacología , Ensayos Antitumor por Modelo de Xenoinjerto/métodos
18.
Food Chem ; 338: 127785, 2021 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-32798825

RESUMEN

Patulin (PAT) contaminant causes severe food safety issue throughout apple industry. Although adsorption is the feasible approach to remove PAT, the limited adsorption capacity and separation difficulty of most adsorbent is the major drawback that remains to be overcome. Here GO-SH doped aerogel was prepared and used for removal PAT from apple juice. The intrinsic porous of the aerogel and abundant active sites including -COOH, -NH2 and -SH offered the PAT adsorption capacity of 24.75 µg/mg that superior to most reported adsorbents. Furthermore, it could reduce 89 ± 1.23% PAT in real apple juice without juice quality deterioration and cytotoxicity. Importantly, the aerogel with good mechanical strength and structure stability could endure the complex juice solution so that there was no any residue after convenient separation of the aerogel, which proved that the proposed aerogel was a promising adsorbent to be applied to apple juice industry for PAT removal.


Asunto(s)
Jugos de Frutas y Vegetales/análisis , Grafito/química , Malus/química , Patulina/química , Patulina/aislamiento & purificación , Azufre/química , Adsorción , Contaminación de Alimentos/análisis , Geles
19.
Food Chem ; 341(Pt 1): 128180, 2021 Mar 30.
Artículo en Inglés | MEDLINE | ID: mdl-33032249

RESUMEN

Lactobacillus helveticus FAM22155 was the most efficient among five lactic acid bacteria at removing aflatoxin B1 (AFB1) during solid-state fermentation on wheat bran substrate. The mechanism of removal was explored by comparing different fermentation modes. Liquid fermentation had little effect on the breakdown of AFB1. However, a protein extract from the fermented bran was equally effective at degrading aflatoxin B1 as living cell digestion. After treatment with heat and protease K, the degrading capacity of the protein extract was significantly reduced. Taken together, the observed biotransformation of AFB1 was mainly associated with proteins produced during bran fermentation. Four products of U-[13C17]-AFB1 were found by mass spectrometry, including Ⅱ-1 (C11H10O4), Ⅱ-2 (C11H10O4), III (C15H12O5), and IV (C14H10O4). These products all lack the lactone ring indicating lower toxicity than aflatoxin B1.


Asunto(s)
Aflatoxina B1/metabolismo , Fibras de la Dieta/microbiología , Lactobacillus helveticus/metabolismo , Aflatoxina B1/análisis , Biotransformación , Fibras de la Dieta/metabolismo , Fermentación , Microbiología de Alimentos , Lactobacillales/metabolismo
20.
Food Chem ; 345: 128022, 2021 May 30.
Artículo en Inglés | MEDLINE | ID: mdl-33039190

RESUMEN

Hen's egg white allergens, namely Gal d 1-4, cause food allergies worldwide and their intake must be strictly controlled by allergic individuals. However, an efficient method for quantifying these allergens is currently unavailable. We aimed to develop an LC-MS/MS method for simultaneous Gal d 1-4 quantification. Purified Gal d 1-4 proteins were trypsin-digested and the resulting peptides used in LC-MS/MS analysis. The limits of quantification were 9.77-39.1 ng/mL. The Gal d 1-4 recovery in fresh and processed eggs was 68.3-121.3%, and intra- and interassay coefficients of variation were 1.5-15.7% and 2.4-38.1%, respectively, indicating high sensitivity, accuracy, and reproducibility. In addition, the high specificity of this method was confirmed by testing 27 other foods. This newly developed method could provide reliable information to the industrial food and clinical fields, facilitating improved quality of life for individuals with egg allergies.


Asunto(s)
Alérgenos/análisis , Cromatografía Liquida/métodos , Clara de Huevo/análisis , Espectrometría de Masas en Tándem/métodos , Animales , Pollos , Femenino , Humanos , Péptidos/análisis , Reproducibilidad de los Resultados
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