Enhancing the oxidative stability of algal oil powders stabilized by egg yolk granules/lecithin composites

2021 ◽  
Vol 345 ◽  
pp. 128782
Author(s):  
Junhua Li ◽  
Yimei Shen ◽  
Jiali Zhai ◽  
Yujie Su ◽  
Luping Gu ◽  
...  
Keyword(s):  
Oxidative Stability ◽  
Egg Yolk ◽  
Yolk Granules ◽  
Algal Oil

scholarly journals Plant Carotenoids as Pigment Sources in Laying Hen Diets: Effect on Yolk Color, Carotenoid Content, Oxidative Stability and Sensory Properties of Eggs

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 721
Author(s):  
Kristina Kljak ◽  
Klaudija Carović-Stanko ◽  
Ivica Kos ◽  
Zlatko Janječić ◽  
Goran Kiš ◽  
...  
Keyword(s):  
Oxidative Stability ◽  
Egg Yolk ◽  
Sensory Properties ◽  
Carotenoid Content ◽  
Total Carotenoid ◽  
Plant Parts ◽  
Total Carotenoid Content ◽  
Dietary Content ◽  
Sensory Color ◽  
Carotenoid Profile

The aim of this study was to evaluate the effect of a supplementation diet for hens consisting of dried basil herb and flowers of calendula and dandelion for color, carotenoid content, iron-induced oxidative stability, and sensory properties of egg yolk compared with commercial pigment (control) and marigold flower. The plant parts were supplemented in diets at two levels: 1% and 3%. In response to dietary content, yolks from all diets differed in carotenoid profile (p < 0.001). The 3% supplementation level resulted in a similar total carotenoid content as the control (21.25 vs. 21.79 μg/g), but by 3-fold lower compared to the 3% marigold (66.95 μg/g). The tested plants did not achieve yolk color fan values as the control (13.47) or 3% marigold (11.47), and among them, calendula had the highest values (9.73). Despite the low carotenoid content in diets supplemented with basil herb, iron-induced malondialdehyde (MDA) concentration was low as for marigold (on average 106.83 vs. 92.68 ng/g after 250 min). The treatments differed in sensory color scores for fresh and hard-boiled yolks and flavor while other sensory properties were similar. In conclusion, the supplementation of plants in a hen diet may result in yolks containing carotenoids and other compounds showing a high antioxidant effect.

scholarly journals Towards Oxidatively Stable Emulsions Containing Iron-Loaded Liposomes: The Key Role of Phospholipid-to-Iron Ratio

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1293
Author(s):  
Alime Cengiz ◽  
Karin Schroën ◽  
Claire Berton-Carabin
Keyword(s):  
Oxidative Stability ◽  
Ferrous Sulfate ◽  
Iron Concentration ◽  
Egg Yolk ◽  
Antioxidant Effect ◽  
Crucial Importance ◽  
Fortified Foods ◽  
Oil In Water ◽  
Iron Concentrations

To encapsulate soluble iron, liposomes were prepared using unsaturated phospholipids (phosphatidylcholine from egg yolk), leading to high encapsulation efficiencies (82–99%). The iron concentration affected their oxidative stability: at 0.2 and 1 mM ferrous sulfate, the liposomes were stable, whereas at higher concentrations (10 and 48 mM), phospholipid oxidation was considerably higher. When applied in oil-in-water (O/W) emulsions, emulsions with liposomes containing low iron concentrations were much more stable to lipid oxidation than those added with liposomes containing higher iron concentrations, even though the overall iron concentration was similar (0.1 M). Iron-loaded liposomes thus have an antioxidant effect at high phospholipid-to-iron ratio, but act as pro-oxidants when this ratio is too low, most likely as a result of oxidation of the phospholipids themselves. This non-monotonic effect can be of crucial importance in the design of iron-fortified foods.

scholarly journals Effect of Sodium Selenite, Selenium Yeast, and Bacterial Enriched Protein on Egg Yolk Colour, Antioxidant Profiles and Oxidative Stability

2020 ◽  
Author(s):  
Aliyu Muhammad ◽  
Daliah Muhammad ◽  
Teck Loh ◽  
Henny Akit ◽  
Anjas Asmara Samsudin
Keyword(s):  
Oxidative Stability ◽  
Antioxidant Properties ◽  
Storage Period ◽  
Egg Yolk ◽  
Microbial Reduction ◽  
Oxidation Products ◽  
Breast Muscle ◽  
Thigh Muscle ◽  
Poultry Feed ◽  
Antioxidant Profile

Abstract Background: The chicken egg is one of the nature’s flawlessly preserved biological products, recognized as an excellent source of nutrients for humans. Selenium (Se) is an essential micro-element that plays a key role in biological processes. Organic Se sources have shown many advantages over inorganic Se in poultry and can be produced biologically by microbial reduction of Se. Therefore, the possibility of integrating Se enriched bacteria as a supplement in poultry feed can provide an interesting source of organic Se, thereby increase egg Se concentration, improve oxidative stability and offer health-related advantages to humans. The objective of this study was to examine the effects inorganic and different organic Se sources on egg yolk colour, antioxidant profile, oxidative stability, and storage effect in relation to the treatments for fresh and stored egg yolk at 4±2 0C for 14 days. Results: The results reveals that dietary Se supplementation, especially the organic (ADS18 > Se-Yeast) sources influence (p < 0.05) egg yolk colour. Dietary inorganic Se and organic Se were noted to significantly improves egg yolk and breast meat antioxidants profile (total carotenoid and phenol content). There was a significant (p < 0.05) decrease in total cholesterol in fresh, stored egg yolk and breast muscle of Se treated groups compared with control. Whereas for breast muscle, only hens with organic Se supplementation (ADS18 > Se-Yeast) showed lower (p < 0.05) cholesterol compared to inorganic and control hens. The oxidative stability parameters of the eggs, breast and thigh muscle, and plasma showed a significant decrease (p < 0.05) in primary oxidation products (MDA) concentrations with hens supplemented with ADS18. However, the MDA content increased (p < 0.05) with an advanced storage period in egg yolk. It should be noted that, compared to inorganic Se and basal diets, egg yolk from hens fed with organic Se remain fresh for 2 weeks.Conclusions: Dietary Se organic supplementation (ADS18 > Se-Yeast) improves egg yolk colour, antioxidant profile, and oxidative status of egg yolk and tissue. For egg enrichment and antioxidant properties, the source of supplemented organic Se is essential. Thus, ‘’functional eggs’’ enriched with organic selenium becomes possible to produced.

Physicochemical and functional properties of leftover egg yolk granules after phosvitin extraction

2018 ◽  
Vol 268 ◽  
pp. 369-377 ◽  
Author(s):  
Meram Chalamaiah ◽  
Yussef Esparza ◽  
Hui Hong ◽  
Feral Temelli ◽  
Jianping Wu
Keyword(s):  
Functional Properties ◽  
Egg Yolk ◽  
Yolk Granules ◽  
Physicochemical And Functional Properties

Emulsifying stability of enzymatically hydrolyzed egg yolk granules and structural analysis

2020 ◽  
Vol 101 ◽  
pp. 105521 ◽  
Author(s):  
Qin Li ◽  
Shitao Tang ◽  
Fayez Khalaf Mourad ◽  
Wenjie Zou ◽  
Lizhi Lu ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Egg Yolk ◽  
Yolk Granules

scholarly journals Egg Yolk Antioxidants Profiles: Effect of Diet Supplementation with Linseeds and Tomato-Red Pepper Mixture before and after Storage

Foods ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 320 ◽  
Author(s):  
Besma Omri ◽  
Nadir Alloui ◽  
Alessandra Durazzo ◽  
Massimo Lucarini ◽  
Alessandra Aiello ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Oxidative Stability ◽  
Control Diet ◽  
Oxidation Stability ◽  
Dietary Treatment ◽  
Egg Yolk ◽  
Red Pepper ◽  
Standard Diet ◽  
Tomato Paste ◽  
Before And After

This study evaluated the effect of dietary incorporation of linseed alone or along with dried tomato paste-pepper powder mix on egg physical characteristics, antioxidant profiles, lipid oxidative status, and yolk coloration before and after storage at 4 °C for one month. Sixty Novogen White laying hens, 27 weeks-old, were divided into three groups and given 100 g/hen/day of a standard diet (C), standard diet containing 4.5% of ground linseed (L), linseed diet containing 1% of dried tomato paste and 1% of sweet red pepper (LTP). Linseeds increased (p < 0.05) egg yolk antioxidant capacity but not lipid oxidative stability (p > 0.05). However, dietary inclusion of LTP did not improve fresh egg yolk antioxidant activity and lipid oxidation stability (p > 0.05). With reference to the stored eggs, only antioxidant activity measured by phosphomolybdenum reduction and lipid oxidative stability were influenced (p < 0.05) by the dietary treatment. Fresh egg yolk of hens fed on linseeds tended to have a slightly more yellow, redder, and less light color than the eggs of hens fed with the control diet. Dietary supplementation of LTP increased (p < 0.05) the Roche yolk color fan (RYCF) score and redness (a*) and decreased (p < 0.05) lightness (L*) without affecting (p > 0.05) saturation (C*). Storage of hens’ eggs fed on the control diet did not influence (p > 0.05) yolk color.

scholarly journals Effect of Aloe Vera Extract on Reducing Aflatoxin B1 in Eggs of Laying Hen and Egg Yolk Oxidative Stability

2021 ◽  
Vol 11 (5) ◽  
pp. 12680-12688
Keyword(s):  
Lipid Peroxidation ◽  
Oxidative Stability ◽  
Aflatoxin B1 ◽  
Aloe Vera ◽  
Egg Yolk ◽  
Positive Control ◽  
Laying Hen ◽  
Positive Control Group ◽  
Control Group ◽  
Control Groups

Aloe vera extract's effect on Aflatoxin B1 (AFB1) residue and yolk oxidative stability was examined in yolk samples. The results indicated that residue of AB1 in AF-Aloe (100 and 300 ppm) treated groups were lower than the control groups on day 14 and was not detected on day 28. The lipid peroxidation level in all groups was significantly (p<0.05) lower than the positive control group. The weight, production, and carotenoid of eggs were not statistically significant between the groups. These results indicate that Aloe vera extract can be effective in diminishing AFB1.

scholarly journals Comparative Study on Foaming Properties of Egg White with Yolk Fractions and Their Hydrolysates

Foods ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 2238
Author(s):  
Xin Li ◽  
Yue-Meng Wang ◽  
Cheng-Feng Sun ◽  
Jian-Hao Lv ◽  
Yan-Jun Yang
Keyword(s):  
Foam Stability ◽  
Egg Yolk ◽  
Egg White ◽  
Foaming Properties ◽  
Foaming Agent ◽  
Yolk Granules ◽  
Industrial Processing ◽  
Egg White Protein ◽  
Egg Yolk Plasma ◽  
Yolk Plasma

As an excellent foaming agent, egg white protein (EWP) is always contaminated by egg yolk in the industrial processing, therefore, decreasing its foaming properties. The aim of this study was to simulate the industrial EWP (egg white protein with 0.5% w/w of egg yolk) and characterize their foaming and structural properties when hydrolyzed by two types of esterase (lipase and phospholipase A2). Results showed that egg yolk plasma might have been the main fraction, which led to the poor foaming properties of the contaminated egg white protein compared with egg yolk granules. After hydrolyzation, both foamability and foam stability of investigated systems thereof (egg white protein with egg yolk, egg white protein with egg yolk plasma, and egg white protein with egg yolk granules) increased significantly compared with unhydrolyzed ones. However, phospholipids A2 (PLP) seemed to be more effective on increasing their foaming properties as compared to those systems hydrolyzed by lipase (LP). The schematic diagrams of yolk fractions were proposed to explain the aggregation and dispersed behavior exposed in their changes of structures after hydrolysis, suggesting the aggregated effects of LP on yolk plasma and destructive effects of PLP on yolk granules, which may directly influence their foaming properties.

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