Abdo Z M, Hassan R, Amal A and Shahinaz A, 2010 . Effect of adding green tea and its aqueous extract as natural antioxidants to laying hen diet on productive, reproductive performance and egg quality during storage and its content of cholesterol. Egyptian Poultry Science Journal30(4): 1121-1149.
Amagase H, Petesch B L, Matsuura H, Kasuga S and Itakura Y, 2001. Intake of garlic and its bioactive components. The Journal of nutrition131(3): 955S-962S.
Bartov I, Bornstein S and Budowski P, 1971. Variability of cholesterol concentration in plasma and egg yolks of hens and evaluation of the effect of some dietary oils. Poultry science 50(5): 1357-1364.
Bess F, Favero A, Vieira S and Torrent J, 2012. The effects of functional oils on broiler diets of varying energy levels. The Journal of Applied Poultry Research, 21(3): 567-578.
Beyer R S, 2005. Factors affecting egg quality. Kansas State University.
Bolukbasi SC, Erhan MK and Kaynar O, 2008. The effect of feeding thyme, sage and rosemary oil on laying hen performance, cholesterol and some proteins ratio of egg yolk and Escherichia coli count in feces. Archiv fur Geflugelkunde 72(5): 231-237.
Bolukbasi S C, Erhan M K and Ürüsan H, 2010. The effects of supplementation of bergamot oil (Citrus bergamia) on egg production, egg quality, fatty acid composition of egg yolk in laying hens. The Journal of Poultry Science 7(2): 163-169.
Bolukbasi S, Kaynar O, Erhan M K and Urupan H, 2009. Effect of feeding Nigella sativa oil on laying hen performance, cholesterol and some proteins ratio of egg yolk and Escherichia coli count in feces. Archiv für Geflügelkunde73(3): 167-172.
Botsoglou N, Florou-Paneri P, Nikolakakis I, Giannenas I, Dotas V, Botsoglou E and Aggelopoulos S, 2005. Effect of dietary saffron (Crocus sativus L.) on the oxidative stability of egg yolk. British poultry science46(6): 701-707.
Bozkurt M, Alcicek A, Cabuk M, Küçükyilmaz K and Catli A, 2009. Effect of an herbal essential oil mixture on growth, laying traits, and egg hatching characteristics of broiler breeders. Poultry scienc 88(11): 2368-2374.
Bozkurt M, Küçükyilmaz K, Pamukçu M, Çabuk M, Alçiçek A and Çatli A U, 2012. Long-term effects of dietary supplementation with an essential oil mixture on the growth and laying performance of two layer strains. Italian Journal of Animal Science 11(1): 5.
Brenes A and Roura E, 2010. Essential oils in poultry nutrition: Main effects and modes of action. Animal feed science and technology158(1): 1-14.
Çabuk M, Bozkurt M, Alçiçek A, Çatlı A and Başer K, 2006. The effect of a mixture of herbal essential oils, a mannan oligosaccharide or an antibiotic on performance of laying hens under hot climatic conditions. S. African Journal Animal Science36: 135-141.
Case G L, He L, Mo H and Elson C E, 1995. Induction of geranyl pyrophosphate pyrophosphatase activity by cholesterol-suppressive isoprenoids. Lipids30(4): 357-359.
Chehreharai A, Shahir MH and Nobakht A, 2011. The effects of different levels of biohebal® feed supplement (contains thymus and garlic extracts) on performance, egg traits and blood biochemical and immunity parameters of laying hens. Veterinary Journal (Pajouhesh & Sazandegi) No 90, 58-65, (In Persian).
Chi MS, Koh ET and Stewart TJ, 1982. Effects of garlic on lipid metabolism in rats fed cholesterol or lard. The Journal of nutrition112(2), 241-248.
Coates P M, Betz J M, Blackman MR, Cragg GM, Levine M, Moss J and White JD, 2010. Encyclopedia of dietary supplements: CRC Press.
Coutts J A and Wilson G C, 1991. Egg quality handbook: Queensland Department of Primary Industries.
Cross D, McDevitt R, Hillman K and Acamovic T, 2007. The effect of herbs and their associated essential oils on performance, dietary digestibility and gut microflora in chickens from 7 to 28 days of age. British poultry science48(4): 496-506.
Demir E, Sarica Ş, Özcan M and Sui Mez M, 2003. The use of natural feed additives as alternatives for an antibiotic growth promoter in broiler diets. British poultry science44(S1): 44-45.
Dikmen B Y and Sahan U, 2007. Correlations between breeder age, egg cholesterol content, blood cholesterol level and hatchability of broiler breeders. British poultry science48(1): 98-103.
FAO U, 2014. FAOstat. Retrieved Feb, 2014.
Florou-Paneri P and ff, 2006. Effect of feeding rosemary and α-tocopheryl acetate on hen performance and egg quality. The Journal of Poultry Science43(2): 143-149.
Florou-Paneri P, Nikolakakis I, Giannenas I, Koidis A, Botsoglou E, Dotas V and Mitsopoulos I, 2005. Hen performance and egg quality as affected by dietary oregano essential oil and tocopheryl acetate supplementation. International Journal of Poultry Science4(7): 449-454.
Folch J, Lees M and Sloane-Stanley G, 1957. A simple method for the isolation and purification of total lipids from animal tissues. Journal of biological Chemistry226(1): 497-509.
Ghasemi R, Zarei M and Torki M, 2010. Adding medicinal herbs including garlic (Allium sativum) and thyme (Thymus vulgaris) to diet of laying hens and evaluating productive performance and egg quality characteristics. American Journal of Animal and Veternary Science5(2): 151-154.
Hafeez A, Männer K, Schieder C and Zentek J, 2016. Effect of supplementation of phytogenic feed additives (powdered vs. encapsulated) on performance and nutrient digestibility in broiler chickens. Poultry science95(3): 622-629.
Haugh R, 1937. The Haugh unit for measuring egg quality.
Itokawa H, Totsuka N, Nakahara K, Maezuru M, Takeya K, Kondo M, Inamatsu M And Morita H, 1989. A quantitative structure-activity relationship for antitumor activity of long-chain phenols from Ginkgo biloba L. Chemical and Pharmaceutical Bulletin 37(6): 1619-1621.
Jung S, Han B H, Nam K, Ahn D U, Lee J H and Jo C, 2011. Effect of dietary supplementation of gallic acid and linoleic acid mixture or their synthetic salt on egg quality. Food chemistry129(3): 822-829.
Konjufca V, Pesti G and Bakalli R, 1997. Modulation of cholesterol levels in broiler meat by dietary garlic and copper. Poultry science 76(9): 1264-1271.
Kubo I, Komatsu S and Ochi M, 1986. Molluscicides from the cashew Anacardium occidentale and their large-scale isolation. Journal of agricultural and food chemistry34(6): 970-973.
Kubo I, Nihei K and Tsujimoto K, 2003. Antibacterial action of anacardic acids against methicillin resistant Staphylococcus aureus (MRSA). Journal of Agricultural and Food Chemistry 51(26): 7624-7628.
Lee K-W, Everts H, Kappert H, Frehner M, Losa R and Beynen A, 2003. Effects of dietary essential oil components on growth performance, digestive enzymes and lipid metabolism in female broiler chickens. British poultry science44(3): 450-457.
Mohiti Asl M, Meymandipur A, Hoseini A and Mahdavi A, 2010. Medicine plant in Animal and poultry Nutrition, Research Institute of Animal Science Publication. (In Persian).
Murakami A, da Silva LGdS, Faveri J and Torrent J, 2009. Effects of functional oils on chickens challenged with coccidiosis. Journal of Animal Science 81: 39.
Nobakht A and Mehman Navaz Y, 2010. Investigation the Effects of Using of Zizaphora (Thymyus valgaris), Peppermint (Lamiaceae menthapiperita), Menta Pulagum (Oreganum valgare) Medical Plants on Performance, Egg Quality, Blood and Immunity Parameters of Laying Hens. Iranian journal of animal science (41) 129-136t (In Persian).
Nobakht A, Behshti D and J Pishjangh J, 2012. Investigation on the effects of different levels of peppermint (Mentha piprita), thyme (Thymus vulgaris) and saturea (Satureia hortensis) medicinal plants on performance, egg quality, blood and immunity parameters of laying hens. Veterinary journal of Tabriz Islamic university (17):1525-1533, (In Persian).
Novak A F, Clark G C and Dupuy HP, 1961. Antimicrobial activity of some ricinoleic acid oleic acid derivatives. Journal of the American Oil Chemists Society38(6): 321-324.
Orwa C, Mutua A, Kindt R, Jamnadass R and Simons A, 2009. Agroforestree database: a tree species reference and selection guide version 4.0. World Agroforestry Centre ICRAF, Nairobi, KE.
Özek K, Wellmann K, Ertekin B and Tarım B, 2011. Effects of dietary herbal essential oil mixture and organic acid preparation on laying traits, gastrointestinal tract characteristics, blood parameters and immune response of laying hens in a hot summer season. Journal of Animal and Feed Sciences20(4): 575-586.
Radwan Nadia L, Hassan R, Qota E and Fayek H, 2008. Effect of natural antioxidant on oxidative stability of eggs and productive and reproductive performance of laying hens. International Journal of Poultry Science7(2): 134-150.
Sarica S, Ciftci A, Demir E, Kilinc K and Yildirim Y, 2005. Use of an antibiotic growth promoter and two herbal natural feed additives with and without exogenous enzymes in wheat based broiler diets. South African Journal of Animal Science35(1): 61-72.
SAS User’s Guide. 2009. Version 9.2. SAS Institute Inc., Cary, NC.
Sayiedpiran S, Nobakht A and Khodaei S, 2011. The effects of using of probiotic, organic acid and blends of some medicinal herbs on performance, egg quality, blood biochemical and immunity parameters of laying hens. Veterinary journal of Tabriz Islamic university (17): 1111-1122, (In Persian).
Senanayake G V, Maruyama M, Sakono M, Fukuda N, Morishita T, Yukizaki C And Kawano M, 2004. The effects of bitter melon (Momordica charantia) extracts on serum and liver lipid parameters in hamsters fed cholesterol-free and cholesterol-enriched diets. Journal of nutritional science and vitaminology50(4): 253-257.
Steiner T, 2010. Application and benefits of phytogenics in egg production. Phytogenics in Animal Nutrition: Natural Concepts to Optimize Gut Health and Performance 1: 157.
Vieira C and Wilson G C, 2001. Pro-and anti-inflammatory actions of ricinoleic acid: similarities and differences with capsaicin. Naunyn-Schmiedeberg's archives of pharmacology364(2): 87-95.
Viuda-Martos M, Ruiz-Navajas Y, Fernandez-Lopez J and Pérez-Alvarez J, 2010. Spices as functional foods. Critical reviews in food science and nutrition 61(1): 13-28.
Wallace R, Oleszek W, Franz C, Hahn I, Baser K, Mathe A and Teichmann K, 2010. Dietary plant bioactives for poultry health and productivity. British poultry science 51(4): 461-487.
Zlatkis A, Zak B and Boyle A J, 1953. A new method for the direct determination of serum cholesterol. Journal of Laboratory and Clinical Medicine41: 486-492.
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