scholarly journals Effects of various antioxidants on oxidative stability of anchovy (Engraulis encrasicolus) oil

2019 ◽  
Vol 36 (4) ◽  
pp. 367-372 ◽  
Author(s):  
Mehmet Gökhan Soydan ◽  
Fatime Erdoğan
Keyword(s):  
Fish Oil ◽  
Storage Period ◽  
The Other ◽  
Oxidation Products ◽  
Butylated Hydroxytoluene ◽  
Rosemary Extract ◽  
Control Group ◽  
Secondary Oxidation ◽  
Total Oxidation ◽  
Oil Storage

The aim of study was to investigate four commercial available antioxidants (groups A (300 mg propyl gallate (PG)+10 mg rosemary extract (RE)/1000 mg), B (240 mg butylated hydroxy anisole (BHA)+80 mg PG+80 mg citric acid (CA)/1000 mg), C (120 mg BHA+120 mg PG+50 mg CA)/1000 mg), D (150 mg butylated hydroxytoluene (BHT)+100 mg BHA+10 mg PG)/1000 mg) used to evaluate oxidation during the storage in fish oil. Antioxidants were added to the fish oil to determine which ones were most effective in preventing oxidation, and fish oil was stored in the amber bottles at room temperature (20 °C) for 90 days. The control group samples were stored under the same conditions and antioxidant was not added. To determine the effect of antioxidants, the recommended by the manufacturer dose of commercial antioxidant (1000 mg kg-1 fish oil) was used in the experimental groups. The formation of the primary and secondary oxidation products in fish oil storage trial was examined by conducting the peroxide value (PV) and p-anisidine value (AV) analyses. The total oxidation value (TOTOX) was calculated based on the PV and AV measurements. Minor changes were observed in the PV of the fish oil during the first 30 days. In the study, antioxidant added samples (groups B, C, D > 5 meq kg-1) were oxidized on the 45th day; on the other hand both control and group A oxidized on the 75th day. A possible prooxidative effect was seen for some of the antioxidants. There was a very little change secondary oxidation of fish oil and no significant effects of all four antioxidant groups on the changes of AV (<20) during the storage period (P>0.05). In addition TOTOX was calculated under GOED (<26) limit during the storage for 90 days. At the end of the study, control samples were not significantly different from the other samples with antioxidant-added. Due to the results obtained at the end of the 90-day study, it was found that none of the antioxidants were used efficiently in this study.

scholarly journals Effectiveness of the Natural Antioxidant 2,4,4′-Trihydroxychalcone on the Oxidation of Sunflower Oil during Storage

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1630
Author(s):  
Hadeil Alsufiani ◽  
Wafaa Ashour
Keyword(s):  
Sunflower Oil ◽  
Storage Period ◽  
Thiobarbituric Acid ◽  
Acid Value ◽  
Oxidation Products ◽  
Butylated Hydroxytoluene ◽  
Natural Antioxidant ◽  
Thiobarbituric Acid Reactive Substance ◽  
Secondary Oxidation ◽  
Total Oxidation

This study aimed to investigate the effectiveness of 2,4,4′-trihydroxychalcone as a natural antioxidant on the oxidation of sunflower oil during an 88-day storage period and to compare its strength with the synthetic antioxidant butylated hydroxytoluene (BHT). Seven groups of the sunflower oil samples were prepared: pure oil (control), oil treated with different concentrations (100, 500, and 1000 ppm) of 2,4,4′-trihydroxychalcone, and oil treated with different concentrations (100, 500, and 1000 ppm) of BHT. Specific parameters, namely, the peroxide value (PV), acid value (AV), p-anisidine value (p-AnV), thiobarbituric acid reactive substance (TBARS) value and total oxidation (TOTOX) value were used to assess the extent of the deterioration of the oil by estimating the primary and secondary oxidation products. The results showed that 2,4,4′-trihydroxychalcone effectively decreased the production of the primary and secondary oxidation products of sunflower oil during storage, as indicated by reductions in the PVs, AVs, p-AnVs, TBARS values and TOTOX values of the sunflower oil. When compared to BHT, 2,4,4′-trihydroxychalcone showed either a similar or stronger effect in inhibiting the primary and secondary oxidation products. These findings suggest that, 2,4,4′-trihydroxychalcone is a suitable natural alternative to synthetic antioxidants to improve the oxidative stability of sunflower oil.

scholarly journals Effect of Gelatin Coated Rosemary Extract (Rosmarinus Officinalis L.) on the Quality of Refrigerated Duck Meat

2019 ◽  
Vol 39 (04) ◽  
Author(s):  
Kimia Banikarimi K Rai ◽  
Habibollah Mirzaei K Basu ◽  
Mohammad Farsi K Basu
Keyword(s):  
Storage Period ◽  
Edible Coating ◽  
Water Holding Capacity ◽  
Rosemary Extract ◽  
Control Group ◽  
Total Volatile ◽  
Psychrotrophic Bacteria ◽  
Rosmarinus Officinalis L ◽  
Water Holding

The effect of edible coating of gelatin (1, 2 and 3%) containing aqueous extract of rosemary (1% and 2%) on physiochemical (pH, total volatile nitrogen, peroxide values and water holding capacity) and microbiological (psychrotrophic) properties of duck fillet were evaluated. The pH of coated samples were significantly (plessthan0.05) lower than that of untreated sample. TVN (total volatile nitrogen) value increased with storage period in all the samples but coatings significantly decreased production of TVN compared to the control. Also the coatings decreased lipid oxidation of the meat as rosemary postponed primary oxidation of fillet, while this parameter in control group was sharply increased by time. WHC (water holding capacity) increased significantly (plessthan0.05) with storage period and level coatings. Coating had a significant reducing effect on growth of psychrotrophic bacteria during 9 days at 4°C. In conclusion, gelatin edible coating enriched with rosemary could retard chemical and microbial reactions related to spoilage of meat during refrigerated storage.

scholarly journals Effect of heating on the oxidative stability of corn oil and soybean oil

2019 ◽  
Vol 70 (2) ◽  
pp. 303 ◽  
Author(s):  
R. Saeed ◽  
S. Naz
Keyword(s):  
Soybean Oil ◽  
Microwave Heating ◽  
Corn Oil ◽  
Acid Value ◽  
Oxidation Products ◽  
Chemical Degradation ◽  
Conventional Heating ◽  
Secondary Oxidation ◽  
Total Oxidation ◽  
Ft Ir

The effects of conventional and microwave heating on the oxidative properties of corn and soybean oil were evaluated. The results showed that acid value, peroxide value, oxidative indices, total oxidation value, and p-anisidine values changed significantly with the rise in temperature (p < 0.05). The peroxide and p-anisidine values for corn oil (PV: 50.670 meqO2/kg, p-AV: 8.248) were greater than soybean oil (PV: 41.694 meqO2/kg, p-AV: 7.566) for conventional heating. The peroxide and p-anisidine values for soybean oil (PV: 6.545 meqO2/kg, p-AV: 76.539) were greater compared to corn oil (PV: 5.074 meqO2/kg, p-AV: 65.360) for microwave heating. The results concluded that microwave heating had a greater impact on the chemical degradation of the fatty acids of the oil. The FT-IR spectra showed peak changes at 3743 cm-1 and 1739 cm-1 and confirmed the rancidity of the oils from microwave heating due to the formation of secondary oxidation products. It was concluded that corn oil showed more oxidative changes compared to soybean oil.

scholarly journals Inhibition of Stigmasterol Oxidation by Antioxidants in Purified Sunflower Oil

2004 ◽  
Vol 87 (2) ◽  
pp. 499-504 ◽  
Author(s):  
Magdalena Rudzińska ◽  
Józef Korczak ◽  
Anna Gramza ◽  
Erwin Wąsowicz ◽  
Paresh C Dutta
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Peroxide Value ◽  
Sunflower Oil ◽  
Model System ◽  
Oxidation Products ◽  
Butylated Hydroxytoluene ◽  
Rosemary Extract ◽  
Peroxide Values ◽  
Ethanolic Extracts

Abstract A study was conducted to analyze the effect of the antioxidants butylated hydroxytoluene, α-tocopherol, ethanolic extracts of rosemary, and green tea on stigmasterol resistance against degradation and formation of its oxidation products in purified triacylglycerols (TAG) from sunflower oil. The content of stigmasterol and its oxidation products 7α-and 7β-hydroxy, α-and β-epoxy, triol, and 7-ketostigmasterol were determined during incubation at 60°C for 3, 6, and 9 days. In addition, peroxide value and fatty acid composition were also determined in the samples. Correlation between the levels of the accumulated stigmasterol oxides and peroxide value of the TAG with antioxidants during incubation was significant only for rosemary extract (R = 0.6799, p &lt; 0.05). The lack of correlation precludes the use of peroxide values to determine the level of sterol oxidation products in the used model system. Correlation between stigmasterol content and the level of stigmasterol oxides was significant for all samples (R = 0.8874, p &lt; 0.05). The total increase of the stigmasterol oxidation products was the lowest in samples with α-tocopherol, but the content of stigmasterol-triol increased the most in this sample. In all the analyzed samples, α-epoxy-stigmasterol was formed in the highest amounts among the analyzed stigmasterol oxidation products.

scholarly journals Improving oxidative stability of olive oil: Incorporation of Spirulina and evaluation of its synergism with citric acid

2017 ◽  
Vol 68 (1) ◽  
pp. 178 ◽  
Author(s):  
N. Alavi ◽  
M. T. Golmakani
Keyword(s):  
Citric Acid ◽  
Oxidative Stability ◽  
Shelf Life ◽  
Olive Oil ◽  
Storage Period ◽  
Synergistic Action ◽  
Oxidation Products ◽  
Secondary Oxidation ◽  
Chlorophyll Contents ◽  
Stability Indices

The effects of different Spirulina concentrations used alone and in combination with citric acid on the oxidative stability of olive oil were assessed. The amounts of primary and secondary oxidation products produced in Spirulina samples were lower than that of the control. The improved oxidative stability indices of Spirulina samples with and without citric acid were in the range of 85.20–94.47% and 258.10–260.21%, respectively. In comparison with the control, Spirulina samples manifested significantly higher carotenoid and chlorophyll contents at the beginning and end of the storage period. The presence of these bioactive compounds results from the presence of Spirulina in the medium and can thus retard the oxidation of olive oil. A higher oxidative stability was reached using BHT in comparison with Spirulina samples. Furthermore, no synergistic action was observed in possible connections between citric acid and Spirulina. In conclusion, Spirulina can enhance oxidative stability and improve the shelf life of olive oil.

Lipid Peroxidation Inhibitory Effects of Hizikia Fusiformis Methanolic Extract on Fish Oil and Linoleic Acid

2004 ◽  
Vol 10 (2) ◽  
pp. 65-72 ◽  
Author(s):  
Nalin Siriwardhana ◽  
K. -W. Lee ◽  
S. -H. Kim ◽  
J. -H. Ha ◽  
G. -T. Park ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Linoleic Acid ◽  
Fish Oil ◽  
Methanolic Extract ◽  
Uv Light ◽  
Lipid Peroxide ◽  
Oxidation Products ◽  
Butylated Hydroxytoluene ◽  
Inhibitory Effects ◽  
Hizikia Fusiformis

The lipid peroxidation inhibitory effects of Hizikia fusiformis methanolic extract (HME) on fish oil and linoleic acid were studied by means of peroxide value (PV), thiobarbituric acid-reactive substances (TBARS), conjugated diene hydroperoxides (CDH) and weight gaining assays. Heat and UV light stability were determined by DPPH assay. HME significantly (p<0.05) reduced the lipid peroxidation in a dosedependent manner. Increasing the level of HME from 0.01 to 0.1% caused a higher antioxidative effect than the one produced by butylated hydroxytoluene (BHT) (BHT reported the best effect compared to -tocopherol and butylated hydroxyanisole). HME reduced the formation of primary oxidation products as showed by the lower CDH values compared to its control counterpart. HME reduced also the addition of oxygen to form lipid peroxyl radicals that indicated a low weight gaining in HME-treated oils. Moreover, it could reduce the formation of lipid peroxide. Furthermore, it diminished the total lipid peroxidation resulting in low TBARS values. The heat and UV light study showed that H. fusiformis contained heat- and UV-light resistant antioxidants. These results indicated that the H. fusiformis antioxidants could be useful in preventing oxidative damages of food oils.

scholarly journals Green Tea Extract Enhances the Oxidative Stability of DHA-Rich Oil

Antioxidants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 982
Author(s):  
Caroline Waingeh Nain ◽  
Gwennaëlle Berdal ◽  
Phan Thi Phuong Thao ◽  
Eric Mignolet ◽  
Marine Buchet ◽  
...  
Keyword(s):  
Oxidative Stability ◽  
Green Tea ◽  
Storage Period ◽  
Oxidation Products ◽  
Omega 3 ◽  
Secondary Oxidation ◽  
Epa And Dha ◽  
Health Promoting ◽  
Tea Extract ◽  
Very High

Docosahexaenoic acid (DHA) is one of the most important omega-3 polyunsaturated fatty acids, with proven health-promoting properties. However, oils with a very high content in DHA (DHAO) are extremely susceptible to oxidation, which affects shelf stability and limits incorporation in food products. Green tea extracts (GTE) are potential candidates for the protection of these oils, but their use in such oils has not been previously reported. This study investigated the effect of GTE (160 ppm, 400 ppm, 1000 ppm) and α-tocopherol (80 ppm, 200 ppm, 500 ppm) on the oxidative stability of a DHAO over a 9-week storage at 30 °C. The oxidative status was monitored during storage by the measurement of peroxide value (PV) and p-anisidine value (p-AV). Changes in eicosapentaenoic acid (EPA) and DHA content, as well as in catechins and tocopherol contents, were also evaluated. The addition of GTE enhanced the oxidative stability of DHAO by reducing the formation of peroxides and secondary oxidation products, whereas α-tocopherol had no significant effect on the PV of oil during storage but led to a significantly higher p-AV. The EPA and DHA content of DHAO was stable in GTE-supplemented samples whereas a decrease was observed in the control and α-tocopherol-supplemented samples. GTE also delayed the degradation of tocopherols initially present in the oil, while catechins resulting from the addition of GTE decreased progressively during the storage period.

scholarly journals Effects of bioactive compounds upon the deterioration of the chilled mechanically deboned poultry meat during storage

Vestnik MGTU ◽  
2021 ◽  
Vol 24 (4) ◽  
pp. 396-407
Author(s):  
L. I. Voitsekhovskaya ◽  
Ye. V. Franko ◽  
S. B. Verbytskyi ◽  
Yu. I. Okhrimenko
Keyword(s):  
Meat Products ◽  
Storage Period ◽  
Acid Number ◽  
Oxidation Products ◽  
Raw Material ◽  
Poultry Meat ◽  
Rosemary Extract ◽  
Resistance To Oxidation ◽  
Oxidative Processes ◽  
Quality Of Products

Mechanically deboned poultry meat is a valuable protein containing raw material widely used for the production of meat products. However, it does not have a high resistance to oxidation; therefore, various antioxidants including those of natural origin are used in its composition. The article provides information on the advisability of using rosemary extract and dihydroquercetin to stabilize lipids and interrupt hydrolytic and chain oxidative processes in mechanically deboned poultry meat. The permissible storage time for mechanically deboned poultry meat using the rosemary extract and dihydroquercetin in a chilled state is 96 hours. Research has been carried out on the oxidative processes of the fatty complex of mechanically deboned poultry meat during the refrigerated storage period. Antioxidants prevent the accumulation of peroxides: in the samples with their use, the peroxide number reaches critical values on 6-7 day of storage, without their use - on 3 day of storage. For all samples, a gradual increase in the acid number has been observed; however, for samples without antioxidants its values reach a critical level on the 4 day of storage, with the use of antioxidants - on the 7 day. The active formation of secondary oxidation products has begun from the second day of storage and reached the limit of permissible values in samples without antioxidants after 3 days of storage. In samples with antioxidants, the thiobarbituric number reaches a critical value on the 6 day. It has also been shown that the use of antioxidants contributes to the preservation of sensorial indicators (colour, odour) improving the quality of products. The efficiency of using the rosemary extract and dihydroquercetin as inhibitors of the oxidation of mechanically deboned poultry meat has been confirmed.

scholarly journals Effect of DL-Methionine Supplementation on Tissue and Plasma Antioxidant Status and Concentrations of Oxidation Products of Cholesterol and Phytosterols in Heat-Processed Thigh Muscle of Broilers

Animals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2050
Author(s):  
Johanna O. Zeitz ◽  
Tamara Ehbrecht ◽  
Anne Fleischmann ◽  
Erika Most ◽  
Denise K. Gessner ◽  
...  
Keyword(s):  
Antioxidant Status ◽  
Control Diet ◽  
National Research Council ◽  
Oxidation Products ◽  
Heat Processing ◽  
Thigh Muscle ◽  
Cholesterol Oxidation ◽  
Control Group ◽  
Feed Conversion ◽  
Total Oxidation

In this study, the hypothesis that supplementation with methionine (Met) as DL-Met (DLM) in excess of the National Research Council (NRC) recommendations improves the antioxidant system in broilers was investigated. Day-old male Cobb-500 broilers (n = 72) were divided into three groups which were fed a control diet or diets supplemented with two levels of DLM in which the concentrations of Met + Cys exceeded the recommendations of NRC by 15–20% (group DLM 1) or 30–40% (group DLM 2), respectively. The three groups of broilers did not show differences in body weight gains, feed intake, and feed conversion ratio. However, broilers of groups DLM 1 and DLM 2 had higher concentrations of glutathione (GSH) in liver and thigh muscle and lower concentrations of cholesterol oxidation products (COPs) in heat-processed thigh muscle than broilers of the control group. Concentrations of several oxidation products of phytosterols in heat-processed thigh muscle were also reduced in groups DLM 1 and DLM 2; however, the concentration of total oxidation products of phytosterols was not different between the three groups. The study shows that DLM supplementation improved the antioxidant status due to an increased formation of GSH and reduced the formation of COPs during heat-processing in thigh muscle.

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