To examine the effect of sugar reduction on the sensory perception of sweetened beverages, an orange juice soft drink model flavoured with seven characteristic compounds (hexanal, decanal, linalool, ethyl butanoate, α-pinene, β-myrcene and (Z)-3-hexen-1-ol) was developed. Five samples were prepared with relevant sugar contents (5.2, 8.2, 9.7, 11.2 and 14.2 °Brix). Using retronasal quantitative descriptive analysis (QDA), nine attributes were found to differ significantly (p < 0.05) with sugar content. When the samples were evaluated orthonasally, only the attribute "overripe orange" significantly decreased (p < 0.05) with reduction of sugar content. Headspace solid-phase microextraction with gas chromatography-mass spectrometry showed that as sugar concentration decreased, the headspace concentration of six of the volatile compounds decreased, whilst ethyl butanoate remained constant. Principal component analysis revealed that the total release of the flavour compounds was highly correlated with the perceived intensity of the orthonasal attribute "overripe orange".
Coffee pulp, a by-product of coffee production, contains valuable compounds such as caffeine and chlorogenic acid with high antiradical activity. In this study, aqueous solutions of β-cyclodextrin (β-CD) were used as a non-conventional solvent for the extraction of targeted compounds from coffee pulp. The parameters of β-CD concentration (Cβcd), liquid-to-solid ratio (L/S), and temperature (T) were evaluated based on the antiradical activity (AAR) and the caffeine content (CCaf). The optimum operational conditions were found to be Cβcd: 9.25 mg/mL, L/S: 30 mL/g and T: 80 °C. The sensory profiles of brews prepared with coffee and coffee pulp with or without cyclodextrin were studied with quantitative descriptive analysis. The brew from the by-product had fruity, botanic, sweet and sourness sensory properties, and cyclodextrin was found to be able to affect the overall taste of the brew.
Oregano (O vulgare subsp hirtum) is one of the foremost subspecies of the O vulgare species, mostly used for culinary purposes. 1 Essential oil (EO) of oregano species has been the focus of numerous researchers because of its potential in the food and pharmaceutical industry. Terpenes are the main bioactive compounds of the volatile fraction. Although the quantitative and the qualitative content of the EO varies, depending on many parameters (eg geographical origin, environmental conditions), the monocyclic and oxygenated monoterpenes carvacrol and its isomer thymol are the main characteristic compounds. 2 Oregano species are also rich in bicyclic monoterpenes such as thujene, camphene, α-pinene and β-pinene. Other monoterpenes found in the EO are γ-terpinene and p-cymene. Moreover, oxygenated sesquiterpenes, such as β-caryophyllene oxide, usually exist 3 in the volatile fraction of the species.Among several biological properties of the EOs, antimicrobial activity has attracted intensive research as a natural antimicrobial that could replace synthetic food additives. 4 The effectiveness of EO from O vulgare against pathogenic bacteria, such as Salmonella enterica subsp enterica ser. typhimurium, Escherichia coli, Listeria monocytogenes Staphylococcus aureus, Pseudomοnas aeruginosa and Micrococcus luteus, has been studied, and most researchers have concluded that estimates of minimal inhibitory concentration (MIC)
Nowadays, essential oils (EOs) have a wide use in many applications such as in food, cosmetics, pharmaceutical and animal feed products. Consumers’ preferences concerning healthier and safer foodstuffs lead to an increased demand for natural products, in replacement of synthetic substances, used as preservatives, flavourings etc. EOs, besides being safe, are promising alternatives as natural food additives, and much research has been carried out on their antioxidant and antimicrobial activity. The initial purpose of this review is to discuss conventional and ‘green’ extraction techniques along with their basic mechanism for the isolation of EOs from aromatic plants. This review aims to provide a broad overview of the current knowledge about the chemical constitution of EOs while considering the existence of different chemotypes, since bioactivity is attributed to the chemical composition – qualitative and quantitative – of EOs. Although the food industry primarily uses EOs as flavourings, an overview on recent applications of EOs in food systems and active packaging is provided. EOs exhibit poor solubility in water, oxidation susceptibility, negative organoleptic effect and volatility, restricting their use. Encapsulation techniques have been proven to be one of the best approaches to preserve the biological activities of EOs and minimize their effects on food sensory qualities. Herein, different encapsulation techniques and their basic mechanism for loading EOs are discussed. EOs are highly accepted by consumers, who are often under the misconception that ‘natural’ means safe. This is, however, an oversimplification, and the possible toxicity of EOs should be taken into consideration. Thus, in the final section of the current review, the focus is on current EU legislation, safety assessment and sensory evaluation of EOs. © 2023 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
There is a growing demand for the development of healthier meat products with reduced fat and salts. The present study was carried out to develop low fat - low salt processed meat products in a type of fermented sausages. Products were formulated with different fat contents (10 g/100g - 20 g/100g) and levels of sodium chloride (0-2 g/100g) and potassium chloride (0-1 g/100g). Potassium chloride (KCl) was used as a substitute for sodium chloride (NaCl). Physicochemical characteristics and textural attributes were assessed instrumentally, while sensory attributes were determined using Quantitative Descriptive Analysis and Principal Component Analysis. The instrumental analysis showed significant (p <0.05) differences in hardness, brittleness, cohesiveness and chewiness among different sausage formulations. However, sensory analysis did not detect any textural changes due to salt substitution or fat reduction. The product with the highest fat content and KCl substitution was found to have the highest rating of perceived bitterness. The research findings identified the significant interaction between the addition of KCl and the fat content on bitterness perception.
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