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1.
以过氧化值为评价指标,采用Schaal烘箱法研究了几种不同抗氧化剂及增效剂对核桃油的抗氧化效果。结果表明:单一抗氧化剂TBHQ的抗氧化效果最好,在60℃烘箱中核桃油保质期为96 h;复合抗氧化剂试验组的过氧化值均低于空白对照的,其中TBHQ和BHT复合使用抗氧化效果较好,在60℃烘箱中核桃油保质期为192 h;柠檬酸和抗坏血酸均能显著提高复合抗氧化剂TBHQ和BHT的抗氧化作用,添加0. 010%柠檬酸的核桃油保质期为312 h,添加0. 010%和0. 012%抗坏血酸的核桃油保质期为288 h;响应面分析试验筛选出抗氧化效果最优组合为0. 017%复合抗氧化剂(TBHQ与BHT质量比1∶1)+0. 012%柠檬酸+0. 010%抗坏血酸,在20℃下核桃油的理论货架期可延长至288 d。  相似文献   

2.
猕猴桃籽油的抗氧化稳定性研究   总被引:5,自引:0,他引:5  
用Schaal烘箱法研究了三种抗氧化剂及增效剂对猕猴桃籽油的抗氧化性能,结果表明:特丁基对苯二酚(TBHQ)的抗氧化性能最好,抗坏血酸和柠檬酸均是TBHQ的良好增效剂,二者都能显著提高TBHQ的抗氧化性能,选用TBHQ、BHT与抗坏血酸作为猕猴桃籽油的抗氧化剂,可使猕猴桃籽油在20℃下的贮藏时间从2个月延到16-18个月。  相似文献   

3.
核桃油自氧化及其抗氧化的实验研究   总被引:20,自引:1,他引:19  
以过氧化值(P0V)为指标研究了温度、时间对核桃油自氧化过程的影响及添加抗氧化剂对核桃油抗氧化性能的影响。结果表明,温度、时间对核桃油的氧化过程有高度显著的影响。TBHQ对核桃油具有较好的抗氧化性能,抗坏血酸和柠檬酸对TBHQ均表现出较强的协同抗氧化效应,且抗坏血酸的协同抗氧化性优于柠檬酸。使用0.015%TBHQ+0.01%柠檬酸或0.015%TBHQ+0.01%抗坏血酸为核桃油的抗氧化剂,可使核桃油在15℃下的贮藏期从2.9个月分别延长至29.8个月和38.9个月。  相似文献   

4.
以热带水果荔枝、龙眼、芒果为研究对象,选取叔丁基羟基茴香醚(BHA)、没食子酸丙酯(PG)、特丁基对苯二酚(TBHQ)、二丁基羟基甲苯(BHT)及茶多酚等作为抗氧化剂,柠檬酸、苹果酸、磷酸、葡萄糖酸钙、EDTA等作为抗氧化增效剂,进行单体和复合抗氧化剂抗氧化试验。结果表明:对龙眼果汁的抗氧化能力从大到小排列为:TBHQ〉BHT〉茶多酚〉PG〉BHA;各种增效剂均可明显增加TBHQ的抗氧化能力,对龙眼果汁的抗氧化能力从大到小排列为:TBHQ+苹果酸+EDTA〉TBHQ+苹果酸〉TBHQ+柠檬酸〉TBHQ+EDTA〉TBHQ+磷酸〉TBHQ+葡萄糖酸钙;TBHQ加入柠檬酸及EDTA增效后对荔枝、芒果原果汁的抗氧化效果理想,VC保存率均达到85%以上。  相似文献   

5.
油脂复合抗氧化剂抗氧化协同增效作用的研究   总被引:10,自引:0,他引:10  
以易氧化酸败的核桃油为试验原料,取等量的9组样品,将抗氧化剂TBHQ、PG、BHT、VE及增效剂柠檬酸、抗坏血酸(VC)分别以不同的组合方式和配比添加到上述9组样品中,然后与空白样一起利用Schall烘箱法每隔24h测一次过氧化值(POV),比较它们的氧化稳定性。试验结果表明:添加0.02%TBHQ、0.01%PG和0.015%VC复合抗氧化剂的油样(在60℃通风条件下贮藏17d)的过氧化值最低为0.75meq/kg,经计算其在20℃存储保质期可达20个月以上。  相似文献   

6.
非洲山毛豆油抗氧化稳定性研究   总被引:1,自引:0,他引:1  
胡林子  李新华  马永全  于新 《食品科技》2011,(6):213-216,220
采用Schaal烘箱法,以过氧化值(POV)为指标,研究不同抗氧化剂种类以及质量对山毛豆油抗氧化稳定性的影响。结果表明,TBHQ对山毛豆油具有良好的抗氧化效果,柠檬酸、抗坏血酸、植酸对TBHQ和BHT复合而成的抗氧化剂表现出较强的抗氧化协同增效作用,协同作用强弱依次为Vc>植酸>柠檬酸;添加0.0150%TBHQ+0.005%BHT+0.01%Vc复配而成的抗氧化剂,可使山毛豆油在20℃条件下的预期贮藏时间从不到4个月延长至13个月。  相似文献   

7.
汉麻籽油自氧化及抗氧化性能的研究   总被引:3,自引:0,他引:3  
采用Schaal烘箱法,以过氧化值(POV)为指标,研究温度、时间对汉麻籽油自氧化过程的影响及添加抗氧化剂对汉麻籽油抗氧化性能的影响。结果表明,温度、时间对汉麻籽油的自氧化过程有显著影响,且温度的影响更明显;叔丁基对苯二酚(TBHQ)对汉麻籽油具有较好的抗氧化性能,柠檬酸和异VC对TBHQ与丁基羟基茴香醚(BHA)复配的复合抗氧化剂均表现出较强的协同抗氧化性能,且柠檬酸的协同抗氧化性优于异VC;添加0.02%TBHQ+0.005%BHA+0.01%柠檬酸或0.02%TBHQ+0.005%BHA+0.01%异VC复合抗氧化剂,可使汉麻籽油在20℃下的预贮藏时间从4个月延长至11~13个月。  相似文献   

8.
抗氧化剂对猪肉脯抗氧化性能的影响研究   总被引:2,自引:0,他引:2  
猪肉脯是一种经高温烤制而成的传统关食,其在贮藏过程中脂肪氧化,POV值升高.本文采用Schaal的耐热实验法,以POV值为指标,研究了TBHQ、BHT、BHA和柠檬酸对猪肉脯的抗氧化效果,结果表明:单一抗氧化剂的抗氧化性能大小顺序为TBHQ>BHA>BHT,复配抗氧化剂的效果优于单一使用TBHQ时的抗氧化效果.0.01%TBHQ与0.01%BHA复配的抗氧化效果比较理想;柠檬酸是增效剂;猪肉脯的最优抗氧化剂组合为0.01%TBHQ+0.01%BHA+0.01%柠檬酸,可使猪肉脯在20℃下的贮藏期达13~18个月.该研究为解决猪肉脯脂肪氧化,延长贮藏期提供了理论依据.  相似文献   

9.
复合抗氧化剂对葵花籽油贮存期的影响   总被引:4,自引:0,他引:4  
采用Schaal耐热试验法,以过氧化值(POV)为指标,研究温度、时间对葵花籽油自氧化过程的影响以及不同抗氧化剂对葵花籽油抗氧化性能的影响.结果表明:温度、时间对葵花籽油的自氧化过程有显著影响,温度的影响更明显;TBHQ对葵花籽油具有良好的抗氧化效果,抗坏血酸和柠檬酸均对TBHQ与PG复配而成的复合抗氧化剂表现出较强的抗氧化协同增效作用,且抗坏血酸的抗氧化协同增效作用优于柠檬酸:添加0.015%TBHQ+0.005%PG+0.02%柠檬酸或0.015%TBHQ+0.005%PG+0.02%抗坏血酸复配而成的复合抗氧化剂,可使葵花籽油在20℃条件下的预期贮藏时间从3个月延长至14个月.  相似文献   

10.
本文研究了茶多酚及由茶多酚与BHT、TBHQ混合,并用柠檬酸作增效剂组成的复合型抗氧化剂对油炸食品的保鲜作用。结果表明;茶多酚对油炸食品有很强的保鲜作用,它与BHT、TBHQ组成的复合型抗氧化剂有明显的增效作用。保鲜效果顺序为茶多酚+TBHQ>茶多酚+BHT>茶多酚。  相似文献   

11.
陈海光 《食品与机械》2003,(6):36-36,38
采用强制保温氧化试验法研究防止南乳花生在保藏期内氧化酸败的措施。试验表明:以0.01%TBHQ 0.01%BHA 0.01%柠檬酸为抗氧化剂的效果为最佳,配合真空 除氧剂的包装形式,南乳花生的保质期可达6个月以上。  相似文献   

12.
The purpose of this work was to examine the relationship of the total polyphenol index (TPI) as measured spectrophotometrically and individual phenols as determined by HPLC to antioxidant activity in red wines made from two Vitis vinifera grape varieties grown in NW Spain (viz. Mencía and Brancellao) during bottled storage in the dark for 12 months. Antioxidant activity was determined by using various methods based on inhibition of the coupled oxidation of the β-carotene/linoleic acid mixture. Also, free radical scavenging activity was determined with 2,2-diphenyl-1-picrylhydrazyl (DPPH). Antioxidant activity as measured by DPPH after storage for 3 months was higher in Mencía wines than in Brancellao wines (4.5 ± 0.60 vs. 3.7 ± 0.30 mmol/L trolox equivalents). Beyond 3 months of storage, radical scavenging activity increased in both types of wine (from 4.5 ± 0.60 to 6.0 ± 0.80 mmol/L in Mencía wines and from 3.7 ± 0.30 to 4.7 ± 0.71 mmol/L trolox equivalents in Brancellao wines). The significant correlation found between antioxidant activity and TPI in all wines (r > 0.88) is indicative of the significance of condensation and polymerisation products to the total antioxidant activity of the wines. The relatively high correlation of total flavonols (r = 0.89) and acylated anthocyanins (r = 0.70) as measured by HPLC with to the overall antioxidant capacity suggests that these two polyphenol classes can substantially influence the antioxidant properties of these wines. The linoleic acid/β-carotene assay exposed a higher antioxidant capacity in Brancellao wines than in Mencía wines after 3 months of storage (6.0 ± 0.80 vs. 4.7 ± 0.70). Most of the studied wines lost an average 45% antioxidant activity during bottled storage. Antioxidant activity as measured with the linoleic acid/β-carotene assay was closely correlated with both hydroxycinnamic acids (r = 0.90) and flavanols (r = 0.71 and 0.61 for monomeric and polymeric forms, respectively).  相似文献   

13.
J.F. Stika  Y.L. Xiong 《LWT》2008,41(9):1535-1540
Beef trimmings from nine cows, equally representing three animal age groups (2-4, 6-8, and 10-12 year), were restructured into steaks formulated with propyl gallate, alone or in combination with a beefy flavoring agent, to enhance palatability and storage stability. Steaks were fully cooked prior to being stored under vacuum for 6 months at −29 °C. Animal age did not affect steak quality and lipid stability, whereas sensory palatability scores and reheating yield decreased significantly beyond 3 months. Propyl gallate did not impart any additional protection against lipid oxidation beyond that provided by vacuum packaging. On the other hand, inclusion of beefy flavoring agent masked all mature, forage-fed beef off-flavors, intensified beefy flavor and improved steak tenderness, juiciness and reheating yield. The incorporation of a beefy flavoring agent was shown to be an effective means to enhance the palatability of vacuum packaged precooked steaks manufactured from mature cows.  相似文献   

14.
The effect of grape antioxidant dietary fibre (GADF) addition to minced fish muscle (MFM) on lipid stability during frozen storage (6 months) was studied. Concentrations of 0%, 2%, and 4% GADF were added to MFM samples. Analyses were carried out immediately after preparation of samples and during and after storage at −20 °C. GADF was characterized in terms of dietary fibre, total polyphenols and antioxidant capacity, and multifunctional antioxidant assays were carried out on all the MFM samples. The addition of red grape fibre considerably delayed lipid oxidation in minced horse mackerel muscle during the first 3 months of frozen storage.  相似文献   

15.
Citrus peel extract as a natural source of antioxidant was evaluated during 6 months storage of refined corn oil at 25 and 45 °C. Extracts of citrus peel were prepared by refluxing the dried ground peel with ethanol, methanol, acetone, hexane, diethyl ether and dichloromethane. Maximum amount of citrus peel extract was obtained with methanol. Antioxidant activity of methanolic extract was assessed by measuring free fatty acid (FFA) content peroxide value (POV) and iodine value (IV) during 6 months storage of refined corn oil at 25 and 45 °C. After 6 months of storage at 45 °C, corn oil containing 1600 and 2000 ppm citrus peel extract, showed lower FFA contents (1.5% and 1.0%), and POVs (8.38 and 7.0 meq kg−1) and higher iodine values (81, 89) than the control sample (FFA 17.0% POV 101 meq kg−1 IV 47). Refined corn oil containing 200 ppm of butylated hydroxy anisole (BHA) and butylated hydroxy toluene (BHT) showed FFA contents of 2.0% and 1.8%, POVs 17.0 and 12.7 meq kg−1 and IVs 84 and 87, respectively, after 6 months of storage at 45 °C. These results show that methanolic extract of citrus exhibited very strong antioxidant activity, which was almost equal to synthetic antioxidants (BHA and BHA). Therefore, the use of citrus peel extract is recommended as a natural antioxidant to suppress development of rancidity in oils and fats.  相似文献   

16.
In order to investigate the effects of thermal processing and preservation on phytochemicals and antioxidant activity of sweet corn kernels, 100 °C, 115 °C and 121 °C were operated as processed conditions and-20 °C was provided for 6 months storage in this study. Results showed that phenolics, vitamin E content and antioxidant activity in sweet corn kernels raised after thermal processing. Three months preservation slightly declined phenolics and vitamin E content. Thermal processing in favor of the retentions of vitamin E and carotenoids. Principle component analyses and correlation analyses were operated to identify the roles of detected compounds. The study figured out the phytochemical profiles of sweet corn kernels during preservation and elaborated the effect of thermal processing, which could be a guidance for the procession and preservation of post-harvest fresh kernels.  相似文献   

17.
综述了目前常用的抗氧化活性筛选方法,以其为更好地评价样品的抗氧化活性提供依据。  相似文献   

18.
抗氧化剂抗氧化方法研究进展   总被引:11,自引:0,他引:11  
综述了目前常用的抗氧化活性筛选方法,以其为更好地评价样品的抗氧化活性提供依据。  相似文献   

19.
M. Bogianchini  A. Gomis  F. López 《LWT》2011,44(6):1369-1375
The purpose of this work is to evaluate the phenolic profile and the antioxidant activity of commercial dealcoholised wines and monitor the stability of their composition over time. This work also aims to test the influence of reverse osmosis (RO) process on phenolic compounds and on the antioxidant activity (AA) of dealcoholised wine.AA was measured by ORAC, DPPH and FRAP assays. Phenolic compounds were determined by LC-DAD.In the commercial dealcoholised wines, AA fell by between 33% and 54% and the concentration of phenolic compounds decreased significantly after 30 days of storage. However, RO process did not significantly affect any phenolic acids, regardless of their chemical structure (benzoic acids, cinnamic acids) and alcoholic degree. The AA and phenolic compounds of these products were monitored for seven months. No significant changes were observed. RO process therefore makes it possible to obtain a healthy, low-alcohol (<2% v/v) product with bioactive compounds that are stable in the product and are similar to those found in the original wine.  相似文献   

20.
The conditions and storage time of green coffee beans are very important for the commercial quality of coffee. This includes factors such as light, humidity and temperature in the warehouse and also the packaging material used. The aim of this study was to evaluate the effects of type of packaging materials namely high density polyethylene (HDPE) bag and jute sack on moisture content, colour, phenolic contents, chlorogenic acids content and antioxidant activity of Arabica green coffee bean during 15 months of storage. The results show that HDPE bag can preserve the moisture content, colour and chlorogenic acid in green coffee beans (GCB) better than a jute sack during storage. No significant difference of phenolics content in green coffee beans was observed during 4 months of storage in both types of packaging. During initial 10 months of storage the antioxidant activity of GCB stored in HDPE showed higher values than that of GCB stored in jute sack. However, after 1 year of storage, the phenolics content and antioxidant activity in GCB in a jute sack were higher than in HDPE bag. The fluctuation of moisture content could lead to stress condition of green coffee bean and contributing to forming of bioactive compounds. This finding was observed and need further investigation.  相似文献   

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