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Author : Jin Sung Won ... [et.al.].
Source : Journal of Food Science 83, 1 (Jan. 2018) 138-146
Abstract : Grapefruit seed extract (GSE)‐containing chitosan‐based coating was developed and applied to cherry tomatoes to protect them from Salmonella invasion and improve their storability. The coating colloids were produced by mixing a chitosan colloid (1% [w/w] chitosan) with GSE at various concentrations (0.5%, 0.7%, 1.0%, and 1.2% [w/w]) using high‐shear mixing (10000 rpm, 2 min). Coatings with chitosan colloids containing GSE at 0.0%, 0.5%, 0.7%, and 1.0% (w/w) inactivated Salmonella on cherry tomatoes by 1.0 ± 0.3, 1.2 ± 0.3, 1.6 ± 0.1, and 2.0 ± 0.3 log CFU/cherry tomato, respectively. Coatings both with and without GSE (1.0%) effectively inhibited the growth of Salmonella and total mesophilic aerobes, reduced CO2 generation, and retarded titratable acidity decrease during storage at 10 and 25 °C. The advantage of incorporating GSE in the formulation was demonstrated by delayed microorganism growth and reduced weight loss at 25 °C. The chitosan‐GSE coating did not affect lycopene concentration, color, and sensory properties (P > 0.05). Chitosan‐GSE coating shows potential for improving the microbiological safety and storability of cherry tomatoes, with stronger efficacy at 25 °C than that of chitosan coating without GSE.
Subject : Antimicrobial packaging. Chitosan. Edible coating. Grapefruit seed. Tomato.
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- Category: food and Agro-Industry
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Author : Ah-Na Kim ... [et.al.].
Source : Journal of Food Science 83, 1 (Jan. 2018) 84-92
Abstract : This study evaluated the effects of grinding at atmospheric pressure (control), under vacuum (∼2.67 kPa), or with modified atmosphere (N2 and CO2) on the browning, antioxidant activity, phenolics, and oxidative enzyme activity of apples as a function of time. The control group was affected most, showing distinct browning and losing most of the antioxidant activity and concentrations of the main phenolic compounds. The modified atmosphere groups retained color, antioxidant activity, and phenolic compounds better than the control group. Least changes were obtained with vacuum grinding, particularly in terms of preventing enzymatic browning and oxidation of antioxidants apples. At 12 h after grinding, vacuum‐ground apples retained total phenolic contents 5.32, 1.54, and 1.49 times higher than control, nitrogen gas, and carbon dioxide gas‐ground samples, respectively. The oxidative enzyme activity, including that of polyphenol oxidase and peroxidase, decreased in the control and modified atmosphere group, but they were maintained in the samples ground under the vacuum.
Subject : Apple. Grinding. Phenolic compounds. Vacuum. Modified atmosphere.
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- Category: food and Agro-Industry
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Source : ฉลาดซื้อ 24, 207 (พ.ค. 2561) 33-39
Abstract : คณะกรรมการองค์การอิสระเพื่อการคุ้มครองผู้บริโภคภาคประชาชน(คอปช.) และมูลนิธิเพื่อผู้บริโภคทำการสำรวจนโยบายของผู้ประกอบการอุตสาหกรรมน้ำตาลต่อการใช้สารพาราควอต จำนวน 47 บริษัท และสุ่มเก็บตัวอย่างน้ำตาลทรายในท้องตลาดจำนวน 21 ตัวอย่าง เพื่อทดสอบหาการปนเปื้อนพาราควอตในผลิตภัณฑ์ ผลการสำรวจพบว่า ผู้ประกอบการอุตสาหกรรมน้ำตาล 6 บริษัท มีนโยบายไม่สนับสนุนการใช้สารเคมีพาราควอต และผลิตภัณฑ์น้ำตาลทรายทั้ง 21 ตัวอย่างไม่มีการปนเปื้อนของสารพาราควอต
Subject : น้ำตาลทราย. น้ำตาลทราย -- พาราควอต.
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- Category: food and Agro-Industry
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Author : Habtamu Admassu ... [et.al.].
Source : Journal of Food Science 83, 1 (Jan. 2018) 6-16
Abstract : Cardiovascular diseases and diabetes are the biggest causes of death globally. Therefore, prevention of these diseases is a focus of pharmaceuticals and functional food manufacturers. This review summarizes recent research trends and scientific knowledge in seaweed protein‐derived peptides with particular emphasis on production, isolation and potential health impacts in prevention of hypertension, diabetes and oxidative stress. The current status and future prospects of bioactive peptides are also discussed. Bioactive peptides have strong potential for use in therapeutic drug and functional food formulation in health management strategy, especially cardiovascular disease and diabetes. Seaweeds can be used as sustainable protein sources in the production of these peptide‐based drugs and functional foods for preventing such diseases. Many studies have reported that peptides showing angiotensin converting enzyme inhibition, antihypertensive, antioxidative and antidiabetics activities, have been successfully isolated from seaweed. However, further research is needed in large‐scale production of these peptides, efficient isolation methods, interactions with functional foods and other pharmaceuticals, and their ease to digestion in in vivo studies and safety to validate the health benefits of these peptides.
Subject : Antioxidant activity. Seaweed. Marine algae.
