Effect of light colour on egg production and egg contamination

Svobodová, Jana; Tůmová, E.; Popelářová, E.; Chodová, Darina

doi:10.17221/8597-cjas

Cited by 15 publications

(11 citation statements)

References 40 publications

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“…Microbial analysis of the eggs was performed according to Svobodová et al. (2015). The eggshell was wiped with 96% ethyl alcohol, and then it was broken by using a sterile knife Albumen and yolk were separated from each other.…”

Section: Methodsmentioning

confidence: 99%

The effect of resin coating on the quality characteristics of chicken eggs during storage

Akarca

Istek

Tomar

2021

Journal of Food Science

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In this study, after washing, changes in the quality characteristics of chicken eggs coated with apricot, almond, and sour cherry tree resins were examined during two different temperatures (4 • C and 22 • C) storage for 60 days.While air cell height, weight loss, albumen and yolk pH and a* (redness) values increased in all samples during storage, Haugh unit, albumen and yolk index, shell fracture and vitelline membrane strength, albumen and yolk L* (lightness) and b* (yellowness) values decreased (P < 0.05). The lowest weight loss (0.54 g) and air cell height (2.89 mm), highest Haugh unit (73.95 HU), albumen index (8.81%), and yolk index (40.37%) were found in the samples coated with sour cherry wood resin stored at 4 • C. The shell breakage and vitelline membrane strength of the coated samples were determined to be higher than the control samples and the samples stored after washing. Higher weight loss, air cell height, and pH values, while lower Haugh unit, Albumen and yolk index were found in samples stored at 22 • C (P < 0.05). At the end of storage, the maximum increase in the counts of total aerobic mesophilic and psychrophilic bacteria was found in the albumin and egg yolk of washed samples stored at ambient temperature. As a result, the coating materials prepared with the resin of apricot, almond, and sour cherry trees were suitable for eggshell's shelf life extension. Practical Application: The consumers demand the eggs be in their freshest condition, but the currently available storage conditions are not sufficient to maintain freshness in many regions of Turkey. The physical, chemical and, microbiological qualities of the eggs coated with wood resins were determined to be superior compared to other samples. Because resins have good barrier properties, it is recommended to conduct extensive studies on their applicability in different products. K E Y W O R D Schicken egg, color, microbial growth, resin coating INTRODUCTIONEgg has a high nutritional value; therefore, it is significant to the economies of the producing countries in addition to being an ancient, staple food. The consumers demand the egg to be in their freshest condition (Xu et al., 2017).It is important to determine the physical, chemical, and microbiological quality changes in eggs for their fresh consumption and preventing economic losses (Eddin & Tahergorabi, 2019).

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Section: Methodsmentioning

confidence: 99%

The effect of resin coating on the quality characteristics of chicken eggs during storage

Akarca

Istek

Tomar

2021

Journal of Food Science

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“…The numbers of Escherichia coli (EC), Enterococcus (ENT), and the total number of microorganisms (TNM) were recorded. Microbial analysis of the eggshell surface was performed according to Svobodova et al (2015). The eggs were sampled by hand (wearing clean gloves) and placed on a clean plastic egg carton.…”

Section: Methodsmentioning

confidence: 99%

Effect of housing system and age of laying hens on eggshell quality, microbial contamination, and penetration of microorganisms into eggs

Vlčková¹,

Tůmová²,

Ketta³

et al. 2018

Czech J. Anim. Sci.

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Vlčková J., Tůmová E., Ketta M., Englmaierová M., Chodová D. (2018): Effect of housing system and age of laying hens on eggshell quality, microbial contamination, and penetration of microorganisms into eggs. Czech J. Anim. Sci., 63, 51-60.Hens of the laying hybrid ISA Brown were used in the study with the objective to evaluate eggshell quality, microbial contamination of eggshells, and penetration of microorganisms into the egg content in different housing systems (enriched cage: 60 hens, 10 hens per cage, 750 cm 2 per hen vs free range: 60 hens, 9 hens per m 2 ) and at different hen ages (26 vs 51 weeks) during storage time (0, 2, 7, 14, and 21 days). A significant interaction between the housing system and age was observed in egg weight and most of eggshell quality measurements. However, microbial contamination and penetration were affected mostly by the housing system and storage time. The numbers of Escherichia coli (P < 0.001, 4.51 vs 2.75 log cfu/eggshell) and Enterococcus (P < 0.001, 2.56 vs 1.11 log cfu/eggshell), and the total number of microorganisms (P < 0.001, 5.04 vs. 3.65 log cfu/eggshell) were higher in free range eggs compared to enriched cage eggs, respectively. The counts of Escherichia coli (P < 0.001, 4.23 vs 2.91 log cfu/eggshell) and Enterococcus (P < 0.001, 2.31 vs 1.27 log cfu/eggshell) decreased with storage time. A positive correlation between the total number of pores and penetration of Escherichia coli in both housing systems was observed in the albumen. It can be concluded that the housing system and age of laying hens significantly affected eggshell quality. Microbial contamination presumably affects the penetration of microorganisms. The correlation between the number of pores and penetration is assumed to be affected by the microbial species.

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“…The monochromatic light effects on the egg quality results in poultry are still contradictory. Egg weight (Rozenboim et al, 1998;Svobodová et al, 2015), eggshell breaking strength, albumin height, haugh unit and yolk color (Hassan et al, 2013) were not influenced by either the monochromatic or the combined light color. On the other hand red light produces smaller eggs, while the white light makes possible to produce large eggs (Er et al, 2007).…”

Section: Resultsmentioning

confidence: 82%

Animal Growth Stimulation by Enzymatic Protein Hydrolysate of Chicken Residues

2020

THE JAPS

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The present study was conducted to investigate whether monochromatic light affects the production performance, egg quality and some plasma parameters of layers. In this study, white and green fluorescent lamps were used to illuminate Brown-Nick hens for 8 weeks. Light sources made uniform to a light intensity of 15 lx. Forty-seven-week-old layers were divided into 2 groups of similar mean weight comprising 16 birds each and housed in individual cages. A 16:8 hours light:dark photoperiod was employed. The layers were exposed to conventional ambient temperature and 50-60% relative humidity for 24h per day. Performance was evaluated by recording feed intake, egg weight and egg production on daily basis; egg quality and egg cholesterol level on weekly basis; and blood parameters on 56 th day of the experiment. The results indicated that green light application did not have any significant effect on feed intake, feed conversion ratio, egg production, total number of eggs, total egg weight, average egg weight, cholesterol level of egg yolk and egg quality of laying hens. However, green light application affected egg yolk color a * and b * values, but decreased serum albumin concentration. The results suggest that green light application may improve the yolk color of laying hens.

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Effect of light colour on egg production and egg contamination

Cited by 15 publications

References 40 publications

The effect of resin coating on the quality characteristics of chicken eggs during storage

The effect of resin coating on the quality characteristics of chicken eggs during storage

Effect of housing system and age of laying hens on eggshell quality, microbial contamination, and penetration of microorganisms into eggs

Animal Growth Stimulation by Enzymatic Protein Hydrolysate of Chicken Residues

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