Flavour and Fragrance Journal最新文献

The flavour quality of Lentinus edodes chicken meat filling with varying proportions of mushroom was analysed using gas chromatography–mass spectrometry (SPME-GC–MS), electronic sensory technology and fuzzy mathematical sensory evaluation. The results indicate that the addition of Lentinus edodes increased the content of unsaturated fatty acids by 3.97% and total volatile compounds by 79.20%, compared to the filling without Lentinus edodes. Furthermore, the ratio of umami amino acids increased by 6.54%. Spearman correlation analysis revealed that sensory scores are influenced by multiple factors rather than a single or few factors alone. Correlation analysis demonstrated a positive relationship between sensory score and the content of flavour amino group and Mushroom alcohol, while showing a negative correlation with the content of 5′-GMP. These findings suggest that changes in the proportion of dry and fresh Lentinus edodes significantly impact the flavour profile of chicken stuffed with Lentinus edodes.

Embedding is an effective method to overcome the poor thermal stability and release properties of lemon essential oil (LEO). This research focused on the fabrication of inclusion complexes through co-precipitation and response surface optimization, employing Fenugreek polysaccharide (FP15) as the wall material. The complexes were assessed through thermal analysis and in vitro slow-release investigations. XRD, FTIR and SEM analysis proved that LEO formed supramolecular structure with FP15 through hydrogen bonding and van der Waals force, and was successfully embedded with packaging efficiency of 57.33%. Thermal behaviour analysis showed that FP15 as a wall material significantly improved the thermal stability of LEO. The analysis based on the KAS and Coats-Redfern methods showed that the apparent activation energy of inclusion compounds increased with the increase of conversion rate, and the secondary reaction model (F2) could better describe the pyrolysis reaction mechanism of inclusion compounds. In vitro release experiments showed that the release of LEO from the inclusion at 37°C (human body temperature) and 65°C (food processing temperature) followed a first-order kinetic model, with LEO being released from the carrier by non-Fickian diffusion. The analysis of pyrolysis products showed that the inclusion compound pyrolyzed at 300°C, 600°C and 900°C to produce a large number of aldehydes, esters and non-/semi-volatile organic acids. The production of these flavour substances improves the quality, concentration of aroma, rich-ness and harmony of the cigarette during smoking. In summary, FP15 as a wall material slowed down the release of LEO, enhanced its stability and improved the sensory quality of cigarettes.

Our current study investigated the effects of exogenous ATP (adenosine triphosphate) on the post-harvest quality of grape (Vitis vinifera L.) fruits. The results demonstrated that treatment with exogenous ATP effectively alleviated the decreases in fruit firmness, total soluble solids (TSS), vitamin C content and soluble protein of the harvested grape fruits. Furthermore, exogenous ATP also significantly enhanced the content of the titratable acidity (TA) of grape fruits after harvest. This was reflected by the observations that ATP treatment increased the hardness, TSS content, vitamin C content and soluble protein content of the harvested grape fruits by 14.39%, 6.29%, 31.05% and 15.18% on average during 8 days of storage, respectively, compared to the controls. In addition, the harvested grape fruits treated with exogenous ATP had higher activities of SOD (superoxide dismutase) and CAT (catalase) and higher contents of total phenolics and flavonoids compared to the controls. This was reflected by the observations that ATP treatment increased the SOD activity, CAT activity, flavonoid content and total phenol content by 39.79%, 19.43%, 17.74% and 15.06% on average during 8 days of storage, respectively, compared to the controls. These observations highlighted that exogenous ATP can function in alleviating the decrease in quality of grape fruits after harvest and increasing the antioxidative ability of harvested grape fruits during the storage period. Consequently, treatment with exogenous ATP could offer an efficacious approach for preserving the quality of grape fruits during the storage period.

Vanillin (4-hydroxy-3-methoxybenzaldehyde) is a phenolic aldehyde compound found in the plants of the genus Vanilla. This substance is widely used as a flavouring in the world, used in the food even pharmaceutical industries. Some studies have reported pharmacological activities such as antitumor, antinociceptive, anti-inflammatory and neuroprotective activities. This study aimed to investigate the spasmolytic, antitussive, expectorant and anti-asthmatic effects of vanillin in rodents. The spasmolytic activity of vanillin was assayed in isolated rat tracheas that were contracted with carbachol or KCl. The in vivo effects were evaluated in mouse models of citric acid-induced cough, phenol red dosage in bronchoalveolar lavage and ovalbumin-induced asthma. The maximal relaxing effect promoted by vanillin in isolated rat trachea was greater in contractions induced by KCl 60 mM than by carbachol (10 μM). In calcium-free media, this effect was significantly reduced during CCh-induced contractions. Vanillin at doses of 10, 30 or 100 mg/kg reduced the number of inflammatory cells in bronchoalveolar lavage and the number of coughs in mice after treatment. The effect of vanillin may be related to the opioid receptor, as the antitussive effect was abolished in the presence of 0, 4 mg/kg naloxone. The vanillin-loaded nanoemulsions exhibited expectorant activity. The present study showed that vanillin may be responsible for these anti-asthmatic, antitussive and spasmolytic effects.

The active sites of waste copper slag were moulded using BaO and used as a catalyst for the esterification reaction without solvent. Various concentrations of BaO were doped over the copper slag and investigated for the esterification of various model components of flavour, fragrance and biofuel. The catalyst was characterised by X-ray photoelectron spectroscopy, attenuated total reflectance-Fourier transform infrared spectroscopy, surface area analysis and X-ray diffraction to examine the impact of BaO addition on the structural and morphological characteristics of BaO_X/Cp-Sl. BaO increases the grain size and enhances the BaO_X/Cp-Sl catalyst's activity and selectivity to flavour, fragrance and biofuel. The BaO_2.5%/Cp-Sl catalyst showed the maximum conversion of oleic acid to the methyl ester. The esterification of various commercially important substrates like geraniol, citronellol, menthol, isoamyl acetate, palmitic acid and waste cooking oil using a catalyst has been explained in detail. The kinetic study of the esterification has been explained with turnover number (TON) and turnover frequency (TOF). The mechanism pathway of the catalyst with various active sites of waste copper slag has been explained using adsorption studies.

Thymol (THY) is a natural antioxidant and antimicrobial; however, its biological activity and application in the food and pharmaceutical fields are limited due to its low water solubility and volatility. In this study, inclusion complexes of cationic-β-cyclodextrin-THY (C-β-CD-THY) were prepared by using the aqueous stirring method. Then UV–Vis spectra, FT-IR, NMR, DSC, XRD and SEM data were collected to characterise the structure and morphology of the inclusion complexes. Phase solubility experiments showed a better solubilisation effect of C-β-CD-THY than HP-β-CD-THY. At a concentration of 0.64 mmol/L for THY, the DPPH scavenging rate was 60.99% and 61.31% for HP-β-CD-THY and C-β-CD-THY, respectively, whereas that of THY in 10% ethanol was only 43.47%. The bacteriostatic activity was verified using a circle of inhibition and the live/dead bacterial double stain. C-β-CD-THY exhibited better antimicrobial activities against Escherichia coli and Staphylococcus aureus than HP-β-CD-THY. In conclusion, the C-β-CD-THY inclusion complexes have the potential to be applied as an effective bacteriostatic agent for food and pharmaceutical applications.

Discomfort caused by inflammation leads to stress and anxiety in patients and seriously decreases the patients' quality of life. People prefer to use natural products instead of anti-inflammatory drugs because of their low toxicity and side effects. Studies have shown that Sphagnum palustre L. (S. palustre) can be used as medicinal plant, but few studies have focused on its anti-inflammatory effects. This study explored the mechanism of action of the ethanol extract of the peat moss plant S. palustre on lipopolysaccharide-induced inflammation in macrophage RAW264.7 cells. Components in S. palustre ethanol extracts (SPE) were identified by HPLC-MS, which mainly included 4-methoxybenzaldehyde, 4-methoxycinnamaldehyde and oleanolic acid. The effects of different concentrations (6.25–100 μg/mL) of SPE after 24 h administration were evaluated to establish a cellular inflammation model. Three biological replicates were performed based on each experiment, the MTT assay results showed that a low concentration of SPE promoted cell proliferation marked by Formazan. In a neutral red uptake assay, the SPE group was effectively inhibited the cell phagocytosis rate. With the increase of SPE concentration, intracellular ROS release decreased, which detected by DCFH-DA. Immunofluorescence assay result showed that SPE inhibited the release of reactive oxygen species from macrophages with fluorescent markers and DAPI. SPE inhibited the release of nitric oxide from macrophages as well. What's more, SPE significantly decreased the protein expression of interleukin (IL)-1, IL-6, and nuclear factor (NF)-κB according to enzyme-linked immunosorbent and immunocytochemical assays. SPE reduces inflammation in macrophage RAW264.7 cells and thus is a promising natural anti-inflammatory plant.

Since ancient times numerous, aromatic and medicinal herbs have been commonly used for the production of various herbal beverages. The effect of yellow gentian (Gentiana lutea) and saline wormwood (Artemisia santonicum) on the qualitative and quantitative composition of the volatile compounds and the sensory properties of the Serbian traditional plum brandy (“slivovitz”) was investigated. Simultaneously, similar commercial alcoholic beverages obtained from the local market have been researched for comparison. Eighty-nine volatile compounds were detected by GC–MS analysis in tested herbal spirits. More than 30% of detected volatile compounds belong to esters, whereas fatty acid esters contributed to the flavour with pleasant fruity and floral notes. The addition of A. santonicum improved the complexity of volatile profiles, with the main contribution of ketones. On the other hand, the phenylethyl alcohol, typical for its pleasant odour, was exclusively detected in samples enriched by yellow gentian. Saline wormwood contains compounds of a higher influence on lightness compared to the gentian root, whose compounds have increased the red colour intensity of the alcoholic product. The volatile compounds of yellow gentian and saline wormwood enriched the sensory properties of alcohol spirits, both contributing to the fruity aroma, with differences in spicy and herbal aroma, respectively. Extractible compounds of the studied herbs increased the complexity of the volatile profile, which significantly improved the aroma of herbal spirits. Selected herbs, already known for their traditional ethnomedicinal uses in the Balkans, could be considered as valuable material for production of functional beverages of attractive sensory traits.

Pyrazine spices are prone to loss during application and storage due to their low molecular weight and high volatility. This study utilised zein as the wall material to develop microcapsules containing 2,3-diethyl-5-methylpyrazine (DEMP), aiming to investigate protective and controlled release capabilities. The microcapsules (zein@DEMP) were fabricated using the antisolvent method, with an optimised loading rate of 11.43%, as determined by response surface methodology. Scanning electron microscopy (SEM) revealed that the zein@DEMP microcapsules exhibited a well-dispersed spherical structure, while transmission electron microscopy (TEM) indicated a core-shell structure. Fourier transform infrared (FTIR) spectroscopy further confirmed the successful encapsulation of DEMP. At the same time, pyrolysis results showed that the DEMP could be released under heating without producing any significant harmful compounds. Additionally, heat release kinetics at varying rates exhibited a strong linear fit, and the release kinetic at 80°C followed a first-order kinetic equation. Storage stability tests demonstrated a significant increase in DEMP retention after 30 days at room temperature. Furthermore, the zein@DEMP microcapsules displayed antioxidant properties. When incorporated into heat-not-burn (HNB) cigarettes at a concentration of 20 mg, the zein@DEMP microcapsules improved sensory evaluation. The transfer behaviour of DEMP was also examined. This study underscores the potential of microencapsulation technology in enhancing the thermal stability and sustained-release characteristics of pyrazine spices.

Airway inflammatory diseases include allergic rhinitis (AR), chronic rhinosinusitis (CRS), bronchial asthma (BA), chronic obstructive pulmonary disease (COPD) and idiopathic pulmonary fibrosis (IPF). Single-cell sequencing (SCS), as a powerful tool for revealing cellular and molecular landscapes at single-cell resolution, which has revealed many of the intrinsic biological features and dynamics of airway inflammation, viral infections and other pathologies, as well as constructing immune landscapes of health and disease states. We reviewed the literature focusing on the past several years have focused on using SCS technology increased our understanding of the airway immune cell landscape of airway diseases, including CRS, AR, BA, COPD, IPF, as well as the landscape of airway immune cells in healthy and pathological conditions. We also have elucidated the role of a subset of T cells, myeloid cell, basophils and mast cells in airway diseases revealed by SCS. Meanwhile we also highlighted the use of SCS to explore the potential mechanisms of immune cell interactions.