Dr. Hassan IH El-Sayyad

Prof. Experimental Embryology & Nutritional Sciences

Faculty of Science, Mansoura University, Egypt


Biography

Education:
• B.Sc. in Zoology May 1974 Very Good, Zoology Department, Faculty of Science, Mansoura University.
• M.Sc. in Zoology 14 May 1979, Zoology Department, Faculty of Science, Mansoura University. Thesis title:" Histopathological and histochemical studies on bilharzial pigment".
• Ph.D. in Experimental Embryology 30/6/1983, Zoology Department, Faculty of Science, Mansoura University. Thesis title:" Experimental studies on the embryonic development of albino mice in nicotine-treated mothers".
History of Employment & Work Experience:
• Demonstrator in Zoology, Zoology Department, Faculty of Science, Mansoura University, from 2/10/1974-6/7/1979.
• Assistant Lecturer of Zoology, Zoology Department, Faculty of Science, Mansoura University, from 7/7/1979-30/7/1983.
• Lecturer of Experimental Embryology, Zoology Department, Faculty of Science, Mansoura University, from 31/7/1983-26/2/1989.
• Assistant Prof. of Experimental Embryology, Zoology Department, Faculty of Science, Mansoura University, from 27/2/1987-30/7/1995.
• Professor of Experimental Embryology, Zoology Department, Faculty of Science, Mansoura University, from 31/7/1995- till now.
• Head of Zoology Dept. from 9/5/2006.

Research Interest

Scientific Activities

Award Prizes:
• Awarded the National Encouragement Prize from Academic Research & Technology of Egypt, 1995.
• Awarded the Mansoura University Encouragement Prize from 2005.
• Award the 14th John M Kinney Award in pediatric nutrition of the 33rd Congress of the European Society for Clinical nutrition, Gothenburg (Sweden) Sept. 2011.

Publications

International journals:
1. El-Sayyad HI, Wafaa M E Elkholy and Wafaa A E Hamed (2017). Promising role of Carob (Ceratonia siliqua L) phytochemical components against neurotoxicity induced by monosodium glutamate. Glob J Zool 2(1): 024-032.
2. El-Sayyad HIH (2017) Future impact of probiotic therapy of metabolic disorder. J Pharma Reports 2: 133.
3. El-Sayyad HIH, Khalifa SA, Fahmy AAE, El-Shahary EA, Ibrahim EMA (2017) Abnormal Soft Palate, Lingual Mucosa and Intestine of Neonates Maternally Fed on Diet Containing Fried Potatoes Chips or Received Acrylamide-Treatment. J Pharma Reports 2: 134.
4. El-Ghawet, H.A.,Gadallah, A.A., El-Mansi, A.A., Amin, A.H. and El-Sayyad, H.I.H. (2017). Markers of Heart, Lung and Dorsal Aorta Damage of Mother Rats and Their Neonates Post Therapeutic Treatment with Doxorubicin, Cisplatin and 5-Flurouracil. Chinese Medicine ,8, 82-99.https://doi.org/10.4236/cm.2017.83007.

5. Doaa A. Ali, Hassan IH. El-Sayyad, Osama A. Moftah, Phil D. Chilibeck (2016). Structural and functional abnormalities of hepatic tissues of male Wistar rats fed on hyper whey and super amino anabolic protein.Nutrition, doi: 10.1016/j.nut.2016.01.017.
6. El-Sayyad HI and El-Shahary EA (2016). Type 2 diabetes and developmental origin of non-alcohol fatty liver disease and future directions of treatment. Clin Exp Pharmacol 6: 220. doi:10.4172/2161-1459.1000220.
7. Hassan IH El-Sayyad, Amora M Abou-El-Naga1, Soad A Khalifa1, Eman A El-Shahari and Hamed AN Jala. Abnormal retinal structure and function of mother Wistar Rats supplemented aspartame, glutamate and galactose. J Drug Metab Toxicol 2016, 7:4 DOI: 10.4172/2157-7609.1000219.
8. El-Sayyad HIH, Sobh MA, Khalifa SA, El-Sayyad OKRA (2016) Adipogenic and Osteogenic Markers Characterization of Human Amniotic Fluid Stem Cells. Stud Stem Cells Res Ther 2(1): 025-032.
9. El Sayyad HIH, Sobh MA, Khalif SA, El-Sayyad OKR (2016) Adipose Derived Mesenchymal Stem Cell Differentiation into Adipogenic and Osteogenic Stem Cells. Stud Stem Cells Res Ther 2(1): 017-024.
10. El-Sayyad HI, Tag-Eldin YM, Khalifa SA, AbdEl-Wahab AA, El-Desoky TMG (2017) Biochemical and Molecular Markers of Congenital and Senile Cataractous Lenses. J Mol Biomark Diagn 8: 318. doi: 10.4172/2155-9929.1000318.
11. El-Sayyad HI, Amin AH, El-Ghawet HA, El- Shahari EA, El-Gebaly A (2017) Role of Pomegranate Juice and Atorvastatin in Ameliorating Spinal Neurotoxicity of Wistar Rats Maternally Fed on Hypercholesterolemic Diet. J Mol Biomark Diagn 8: 316. doi: 10.4172/2155-9929.1000316.
12. Tawfik AA, Noaman I, El-Elsayyad H, El-Mashad N,Mona Soliman M. (2016). A study of the treatment of cutaneous fungal infection in animal model using photoactivated composite of methylene blue and gold nanoparticle. Photodiagnosis and photodynamic therapy; 15: 59-69. file:///C|/Users/laptop%20center/Desktop/dx.doi.org/10.1016/j.pdpdt.2016.05.010.
13. El-Sayyad HIH, Khalifa SA, Eman HM Bakr, Jala HAN (2016). Comparative studies on lens structure and function of newborn rats maternally treated with aspartame,monosodium glutamate and galactose. Int. J. Adv. Res. Biol. Sci. 3(7): 145-154.
14. El-Sayyad HIH, Ali DA, Hanafy ME. Role of Fish Oil on Amelioration of Injured Cornea and Lens of Diabetic and Hypercholesterolemic Male Wistar Rats. J Nutri Health. 2016;1(2): 9.

13. El-Sayyad, HIH. Cellular cholesterol retention in atherosclerosis.- Human health handbooks , Volume 11, Editors Ronald Ross Watson and Fabien De Meester. DOI: http://dx.doi.org/10.3920/978-90-8686-821-6.
14. Doaa A. Ali1, Osama A Moftah, Hassan IH El-Sayyad (2015). Role of hyperwhey and super amino 2500 body building protein in impairment of thyroid structure and function. Int. J. Adv. Res. Biol. Sci. 2(10): (2015): 44–50.
15. El-Sayyad HIH, Mostafa FE, Atia HM, Sobh HM, El- Emam SIAM. (2016). Role of adipose derived mesenchymal stem cells cultured in media containing either normal or pathogenic serum or renal homogenate in regenerating renal medulla of cisplatin-intoxicated male Sprague Dawley rats. Int. J. Adv. Res. Biol. Sci. 3(2): 198-210.
16. El-Sayyad HIH, Bakr EHM, El-Ghawet HA, El-Desoky TMG. Overview of Congenital, Senile and Metabolic Cataract . J Ocular Biol. 2015;3(2): 12.
17. El-Sayyad HIH, Bakr IHM, El Mansi AE, Amin AH, El Beeh ME, Asiri AMA (2015). Fish oil supplementation ameliorated brain lesions induced by diabetes and hypercholesterolemia in male Wistar albino rats. Autism Open Access 5: 148. doi:10.4172/2165-7890.1000148.
18. El-Sayyad HIH, Abdraboh ME , Aljebali AMA (2015). Hair growth defects of diabetic and hypercholesterolemic Wistar albino rats and amelioration of fish oil-treatment. J Nutr Health:1(1).1-6.
19. El-Sayyad HIH, Abdraboh ME, Aljebali AMA. Positive Impact of Fish Oil on Diabetic and Hypercholestrolemic Skin Disorders. J Nutri Health.2015;1(2): 8.
20. El-Sayyad HIH, Tag-Eldin Y, Khalifa SA, Abd-El-Wahab AA, El-Desoky TMG (2015). Expression of isoenzymes carbonic anhydrase, esterase, lactic dehydrogenae and superoxide dismutase in congenital and senile cataractous lenses of patients. Int. J. Adv. Res. Biol.Sci. 2(8): 94–99.
21. EL-Sayyad HIH, Abou-Zaid DFA, Abdo AMR (2015). Impairment of thyroid and prostate in experimentally induced diabetes and atherosclerosis male Wistar albino rats. Res. Opin. Anim. Vet. Sci., 5(8): 320-328.
22. El-Sayyad HIH, Ramadan MM, Abou-Egla MH, Asiri AMA and El-Beeh ME.(2015). Role of gibberellic and indole acetic acid in altering ocular structure and function of mother rats and their offspring. Br. J Med. & Med Res.10(12): 1-14.
23. Badawy G, El-Sayyed H, Elnabi SH, El-Elaimy I, Al Shehari E. (2015) Developmental defects of cerebral cortex in maternally diabetic and aluminum intoxicated rat pups and their amelioration by Morus alba. Journal of Bioscience and Applied Research 1(4): 168-180.
24. Hassan I. H. El-Sayyad, Ahmed A. El-Mansi, Iman HM Bakr (2015). Hypercholesterolemia induced ocular disorder: Ameliorating role of phytotherapy. Nutrition. 31(11-12): 1307–1316.
25. Hassan I. H. El-Sayyad, Ahmed A. El-Mansi, Mona S Guida and Ezaldin AM Mohammed.(2015). Markers characterizing corneal damage during aging of rat. JAC.; 11(5):3532-3539.
26. Samah T. Darwish, Mahmoud E. Mohalal , Menna M. Helal ,Hassan I.H. El-Sayyad (2015), Structural and functional analysis of ocular regions of five marine teleost fishes (Hippocampus hippocampus, Sardina pilchardus, Gobius niger, Mullus barbatus & Solea solea). Egyptian J. Basic and Appl.Sci. 1 -8.
27.El-Sayyad HIH, El-Ghawet HA, Al-Haggar MS, Iman H. Bakr (2015).Impairment of bone growth of wistar rat fetuses of diabetic and hypercholesterolemic mothers. Egyptian J. Basic and Appl.Sci. 2(1): 1–12.
28. El-Sayyad, HIH (2015).. Cholesterol overload impairing cerebellar function: the promise of natural products. Nutrition. 2015;31(5):621-30.
29. El-Sayyad1 HIH,El-Ghawet HA, Mustafa MEZ , El-Said EM and Abd-Elatif EMI.(2015). Placenta and amniotic IgG and lysozyme: A monitoring of foetal damage of hypertensive or atherosclerotic mother mice. Int. J. Curr.Microbiol. Appl. Sci. 4(1): 748-754.
30. Sabry DA, Fouda YA, Abou-El-Naga AM, Khalifa SA, El-Sayyad HIH.(2015). Comparative studies of tongue of Gopherus gopherus (turtle), Mus musculus (mice), Erinaceus auritus (hedgehog) and Psammomys obesus. Journal of Bioscience and Applied Research, 1(4)::160-167.
31. El-Sayyad, HIH , Al-Haggar, MMS, El-Ghawet, HA, Bakr, IHM (2014).Effect of maternal diabetes and hypercholesterolemia on fetal liver of albino Wistar rats. Nutrition 30 (2014) 326–336.
32. El-Sayyad,HI H, Abbas OA,Soliman MF,Greash Z A.(2014). Hepatotoxicity and femoral chondrodystrophy of pregnant mice infested with Scistosoma mansoni and treated with praziquantel. Int.J.Curr.Microbiol.App.Sci ; 3(5): 448-461.
33. El-Sayyad HI, Khalifa SA, Al-Gebaly AS, El-Mansy AA (2014). Aging Related Changes of Retina and Optic Nerve of Uromastyx aegyptia and Falco tinnunculus. ACS Chem. Neurosci. 2014, 5, 39−50.
34. Sobh MA,El-Sayyad HIH,Khalifa SA, Bakr EH, El-Sayyad OKR. In vitro comparative studies of adipocyte stem cells derived from human tissue and amniotic fluid cells. Int. J. Exp. Pharmacol.2013;4(1):29-34.
35. El-Sayyad, HIH, Khalifa, SA, El-Sayyad, FI, Al-Gebaly, AS, El-Mansy, AA and Mohammed, EAM ( 2014). Aging-related changes of optic nerve of Wistar albino rats. Age (Dordr). 2014 Apr;36(2):519-32.
36. El-Sayyad, HIH,Fawkia I El-Sayyad, Mohamed H. Abou-Egla, Heba A. El- Ghawet (2013). Effects of lamotrigine and Sodium Valporate on Experimental Epileptic Mother Albino Rat and Their Pups. Journal of Internal Medicine Research, 1(1):12-21.
37. El-Sayyad, HIH, El-Shershaby, EM, Saleh, DF(2013). Effects of experimental diabetes and gliclazide on pregnant albino rats and their pups. JIMR 2013;1(1):22-29.
38. El-Sayyad, HIH, El-Sherbiny, A.M.Abou-El-Naga, Gad-Allah, AA, Areida,SK (2013) Effects of adriamycin, cisplatin and 5-flurouracil on the testis of albino rats. British J. Med.& Health Sciences, 1( 5): 45-62.
39. El-Sayyad HI, Khalifa SA, El-Sayyad FI, Mousa SA, Mohammed EA. (2014). Analysis of fine structure and biochemical changes of retina during aging of Wistar albino rats. Clinical and Experimental Ophthalmology, 2014 Mar;42(2):169-81.
40. El-Sayyad HI, Fouda,YA,Khalifa SA, Al-Gebaly, AS, El-Sayyad OK (2013).Studies on epidermal appendages of chick embryos. Int.J.Curr.Microbiol.App.Sci, 2(5): 315-327.
41. Gad-Allah, AA, El-Sayyad, HIH, El-Shershaby, EMF, Abdelatif , IM (2013). Neuropathies of spinal cord development of rat pups maternally fed on fried potatoes chips. J Exp Integr Med. 2013; 3(4): 285-292.
42. El-Sayyad HI, Al-Haggar MS, El-Ghawet HA , Bakr IH (2012). Cardiomyopathy and angiogenesis defects of Wistar rat fetuses of diabetic and hypercholesterolemic mothers. Nutrition;28(7-8):e33-43.
43. El-Sayyad HI, Khalifa SA, Fouda YA, Yonis AS. (2012). Effects of diabetes and or hypercholesterolemia on rat foetuses skin development. J. Nutrition;28(6):698-706.
44. El-Sayyad, HI, Abou-Egla ,MH, El-Sayyad , FI, El-Ghawet, HA, Gaur ,RL, Fernando ,A, Raj, MHG, Ouhtit, A (2011). Effects of fried potato chip supplementation on mouse pregnancy and fetal development. Nutrition 27 (2011) 343–350.
45. El-Sayyad HIH, M..El-Sherbiny, M.A. Sobh, A.M.Abou-El-Naga, M.A.N. Ibrahim and S.A. Mousa (2011). Protective effects of Morus alba leaves extract on ocular functions of pups from diabetic and hypercholesterolemic mother rats. Int.J.Biol.Sci.; 7 : 715-728.
46. El-Sayyad, H.I., El-Gammal, H.L., Habak, L.A. & Abd-El-Galil, H.M, HA, Gaur ,RL, Fernando ,A, Raj, MHG, Ouhtit, A (2011).Structural and Ultrastructural Evidence of Neurotoxic Effects of Fried Potato Chips on Rat Postnatal Development. Nutrition, 27 (2011) 1066–1075.
47. El-Sayyad HIH, Saber A. Sakr, Gamal M Badawy & Hanae S Afify (2011).Hazardous effects of fried potato chips on the development of retina in albino rats. Asian Pacific J. Trop. Biomed.; 253-260.
48. El-Sayyad HIH, Amoura M. Abou-El-Naga, Abdelalim A. Gadallah, Iman H. Bakr (2010). Protective effects of Allium sativum against defects of hypercholesterolemia on pregnant rats and their offspring. Int J Clin Exp Med 2010;3(2):152-163.
49. El-SayyadIH, Viola H.Zaki., Abdallah M El-Shebly and Dina A.El-Badry (2010). Studies on the effects of bacterial diseases on skin and gill structure of Clarias gariepinus in Dakahlia Provinence, Egypt. Annals of Biological Research, 2010, 1 (4) : 106-118.
50. EL- Sayyad, H.I. , Yonis, M.W.F., Bayomi, F.F.M. and Shalaby, S. (2009). Epidermal sense organs of the Gekkonid tropicolotes tripolitanus Peters 1880. J. Cell and Anim.Biol.3 (6): 088-092.
51. EL - Sayyad, H.I. , Abou- E l -Naga , A.M . , Bayomi , A. A. and Gad A bdo, A.M . (2009). Effects of maternal phenylketonuria on the development of the offspring’s eye. HUM ONTOGENET 3(2): 1–15.
52. El- Sayyad, H.I. , Ismail, M.F.,Shalaby, F.M., Abou-El-Magd, R.F., Rajiv, L.Gaur, Augusta Fernando, Parakash Rao, Madhawa HG Raj And Allal Ouhtit (2009). Histopathological and ultrastructural effects of cisplatin, doxorubicin and flurouracil on liver of male albino rats. Int. I. Biol. Sciences.; 5(5):466-473.
53. Johnson,T, Ouhtit ,A, Gaur, R, Fernando, A, Schwarzenberger, P, Su, J, Ismail, MF, El-Sayyad, H.I., Karande, A, Abd Elmageed, Z., Rao, P, Raj, M (2009). Biochemical characterization of riboflavin carrier protein (RCP) in prostate cancer. Frontiers in Bioscience 14, 3634-3640.
54. Ouhtit, A, Gaur ,RG, Abd Elmageed, ZY, Fernando, A., Thouta, R, Trappey, AK, Abdraboh ,ME, El-Sayyad, HI, Rao, P, Madhwa G.H. R. (2009). Towards understanding the mode of action of the multifaceted cell adhesion receptor CD146. Biochimica et Biophysica Acta. 795; 130-136.
55. El-Sayyad, H.I.H.; Khalifa, S.A.,El-Sayyad, F.I. and Maylod, E.E. (2012). Biochemical and ultrastructural changes in lens during aging albino rats. British J. Med.& Med. Res. 2(1): 105-121.
56. El-Sayyad, HIH. Sabry,DA, Khalifa,SA, Abou-El-Naga,AM, Foda,YA (2011). Studies on Tongue of Reptilian Species Psammophis sibilans, Tarentola annularis and Crocodylus niloticus. Int. J. Morphol., 29(4):1139-1147.
57. El-Sayyad, HIH, Fawkia I El-Sayyad, Mohamed H. Abou-Egla, Heba A. el- hawet (2013). Effects of lamotrigine and Sodium Valporate on Experimental Epileptic Mother Albino Rat and Their Pups. Journal of Internal Medicine Research, 1(1):12-21.
Local Journals:
58. El –Sayyad, H IH, Khalifa, SA, El –Sayad, FI and El –Mansi, A A.(2013). Sexual differentiation of retinal in healthy and acrylamide –intoxicated albino rats. Egypt. J. Exp. Biol. (Zool.), 9(1): 109 – 118.
59.El –Sayyad, H IH, Khalifa, SA, El –Sayad, FI and El –Mansi, A A.(2013). Effects of acrylamide on the central nervous system of albino rats. Egypt. J. Exp. Biol. (Zool.), 9(1): 1-7 .
60.Hassan I.El-Sayyad, Gamal M badawy & Eman A. El-Shehary (2010). Effects of celecoxib and leflunomide on pregnant albino rats and their delivered newborn. Histopathological studies. Egypt J.Exp.Biol. (Zool); 6(2): 273-283.
61. El-Sayyad H.I.H., M.A..El-Sherbiny, M.A. Sobh, Ibrahim,M (2010). Protective effects of Morus alba leaves extract against congenital and skeletal malformations of diabetic and hypercholesterolemic mother albino rat's offspring. Egypt. J. Exp. Biol. (Zool.), 6(2): 365 – 374.
62. Abou El-Naga, A.M.; El-Sayyad, H.L; EI-Shershaby and Esmail, S.E.M. (2006): Effects of experimentally- induced phenylketonuria in female rats on the gonad development of their youngs. J. Egypt.Ger.Soc.Zool.; 47(B): 11-28.
63. El-Sayyad, H.L; Abou El-Naga, A.M.; Sayed, K.A.; EI-Shershaby and Gad-Allah, A.A. (2006): Developmental defects of experimentally –induced Phenylketonuria in the cerebellum of the young rat during their postnatal life. Egypt. J. Zool., 44: 445-479.
64. El-Gammal, H.I., Bahnswy, M.H., El-Sayyad, H.I. and El- Gammal I.M. (2003): The ultrastmcture of Spermatozoa and spermiogenesis of in Sarotherodon galilacus. and Liza ramada (Teleostei, perciformes, Cichlidae and Mugilidae). J. Egypt. Ger. Soc. Zool., 40(B): 69-79.
65. El-Sayyad, H.I. & El-Gammal, H.I. (2001): Effects of ethylene glycol monomethyl ether on prenatal development of. albino rats. J. Egypt. Ger. Soc. Zool., 35(B): 59-76.
66. El-Gammal, H.I. & El-Sayyad, H.I. (2001): Epidermal changes of newly born offspirng from arthritic mothers treated with dexamethasone. J. Egypt. Ger. Soc. Zool, 35(B): 45-57.
67. El-Sayyad, H.L, El-Shershaby, E.M, Abou El-Naga, A.M., and Gad-Allah, A.A. (2000): The role of fish oil and vitamin E in ameliorating gonadal dysfunction in comparison with diclofenac in polyarthritis of albino rats. J.Egypt. Ger. Soc. Zool., 32(C): 45-69.
68. El-Sayyad, H.I., Hussein, M.B. Abou-EgIa, M.H.and El- Mandouh, S.E. (2000): Effect of hypertheramia on mothers of albino rats and their fetuses during utero life. J. Union, Arab Biol. Cairo, 14(A): 607-617.
69. Mohamed, M.B.H, El-Sayyad, H.I., Khalifa, S.A. and Sabry, D.A.M. (2000): Postnatal development of albino rat, cereblar cortex under hyperthemia stress. J.Union, Arab Biol, Cairo. ,14 (A): 409-420.
70. El-Sayyad , H.I., EI-Sherbini, S.A., Abour EI-Nagaa, A.M.A. and Adl, M.A. (1999): Effects of ethyleme glycol (2- methoxyethanol) on testis of albino rats: Light and transmission electron microscopic studies. J. Union. Arab: Biol., 12 (A): 319- 333.
71. El-Sherbiny, S.A., Abou El-Naga, A.M., El-Sayyad , H.I. and El-Adel, A.M.C (1999): Light and Transmission electron microscopic studies on the effect of nicotine on testis of albino rats. J. Union Arab BioL, 12(A): 173-184.
72. Zaki, M.I, EI-Sayyad, H.I., El-Wazir, A.H., Assem, S.S. and El- Gamal, A.A (1998): Morphological and histological studies on the gonads and pituitary glands of the hermaphrodite fish, Sparus aurata L. Reared in captivity fish farms. J. Egypt. Ger. Soc. ZooL, 1126(C): 103-116.
73. Zaid, M.I., Hagras, A.E., EI-Sayyad, H.I., Assem, S.S., and El-Gamal, .A. (1998): Studied on some biological parameters of the Gilthead Bream Sparuss aurata L reared in fish farms. J. Egypt. Ger. ZooL, 26 (A): 59-74.
74. HI El-Sayyad, SA Karim (2004). Effects of flufenoxuron-an environmental antimoulting insecticide-on gonad function of Albino rats. J. Egyptian German Society( Zoology) 25, 45-64.
75. El-Sherbiny S.A, and El-Sayyad H.I. (1998): Protective effect of glutathion against aluminium toxcity affecting fermur bone and some parenchymatous organs of pregnant diabetic and non- diabetic albino rats. J. Egypt. Ger. Soc. Zool, 26(C): 153-167.
76. El-Sayyad, H.I. and El-Sherbiny, S.A. (1998): Histological study on the toxic effects of diabetes and aluminum on the histogenesis of fetal skeletal elements of albino rats. J. Egypt. Ger. Soc. Zool, 26(C): 117-135.
77. El-Sayyad, H.I. and Kareim, S.A., (1998): Effects of flufenoxuron (an environmental antimoulting insecticide) on organ function of albino rats. J. Egypt. Ger. Soc. Zool., 25(B): 45-64.
78. EI-Gammal, H.I., El-Sayyad, H.I., Ibrahim , M.S. and Abd EI-Rahman, M.I. (1997): Histological abnormalities of supra renal gland of female albino rats after treatment with aflatoxin B1 and estradiol. Mans. J. Environ. Sci., 14: 181-194.
79. El-Gammal, H.L, Ibrahim, M.S., El-Sayyad , H.I. and Abd El-Rahman, H.I.H.(1997): Effects of estradiol on the reproductive tract of weanling female albino rats toxicated with aflatoxin Bl. J. Environ Sci., 13: 179-208.
80. Ibrahim, M.S., El-Gammal, H.L., El-Sayyad , H.I. and Abdel Rahman, M.I. (1997): Potentiation of hazardous effects of aflatoxin Bl on thyroid gland of weanling female albino of weanling female albino rat by estradiol. J. Environ. Sci., 13: 149-164.
81. Ramadan, M.M., El-Sayyad, H.I. , El-Shershaby, E.M. and El-Baz, H.M. (1996): Effects of anticancer drug dibromodulcitol on the histology, histochemistry of the ovaries and uteri of the albino rat. Mans. J. Environ Sci., 13: 127- 147.
82. El-Sayyad, H.I., El-Gammal, H.I. and Kariem, S.A. (1996): Some aspects of growth deformities of chick embryos induced by flufernoxuron. J. Union Arab BioL, 5(A): 313-329.
83. El-Shershaby, E.M., El-Sayyad, H.I. Ramadan, M.M. and , El-Baz, H.M. (1996): Effects of anticancer drug dibromodulcitol on the histology, histochemistry and spermatogenic activity of the testis of the albino rat. J. Union Arab. BioL, 5(A): 414-437.
84. Ibrahim, M.S., El-Gammal, H.I., El-Sayyad, H.I. and Abd El-Rahman, M.I. (1995): Studies on the influence of estradiol 17B with the the aflatoxin B, in the induction of histological abnormalities in renal tissues of albino rats. J. Union. Arab. Biol. Cairo., 3(A): 401-422.
85. EI-Sayyad, H.I., Abou-EgIa, M.H, Othman, A E and EI-Mandouh, ,M.A. (1995): Histological abnormalities in renal tissues of virgin pregnant mothers of mice and their offsprings after thiodicarb-treatment. J. Environ. Sci., 10(2): 29-48.
86. Abou-EgIa, M.H., EI-Sayyad, H.I. & El-Shershaby, E.M. (1995): Histological and physiological studies m male rats after alcoholic beverrage and nicotine-treatment. Mans. Sci. Bull., 12 (I): 163-179.
87. El-Sayyad, H.I. (1995): Teratogenic effect of methylprednisolone acetate (Depo-Medrol) on chick embryos. J. Egypt. Ger. Soc. ZooL, 16 (B): 143-160.
88. El-Sayyad, H. I. H. (1995): Structural analysis on the mucosa of alimentary canal of hatching youngs of the Owl. Egypt. J. Ger. Soc. ZooL. 16 (B): 185-202.
89. EI-Sayyad, II. I. H. (1995): Light and electron microscopic studies of hair follicle growth of virbrissae region during embryogenesis of albino rat. J. Egypt. Ger. Soc. ZooL, 16 (B): 111-1142.
90. El-Sayyad, H. I. H. (1995): Light and electron microscopic studies of vibrissae skin development of albino rat. J. Egypt. Ger. Soc. ZooL, 16 (B): 229-265.
91. Kariem, S.A., EI-Sayyad, H.I. and EI-Kenany, N.A. (1995): Effect of nickel sulphate on the regeneration of hind limb in tadoples of the toad, Bufo viridis var orienta/is. II. Amputationn in middle shank region. J. Egypt. Ger. Soc. Zool., 16 (B): 203-227.
92. EL-Sherbiny, S.A, El- Sayyad, H.I, El-Gammal, H.L. & El-Shershaby, E.M. (1995): Effects of diflubenzuron and chlorafluruazuron on the histological and histochemical structure of ovary of albino rats. J. Egypt. Ger. Soc. Zool. 17 (C): 1-20.
93. El-Sayyad, H.I., El-Shershaby, E.M.F., EI-Sherbini, S.A. & El-Gammal, H.L.(1995): Studies on the side effects of diflubenzuron and chlorafluazuron on the testis of albino rats. J. Egypt. Ger. Soc. ZooL, 17 (C): 21-43.
94. El-Shershaby, E.M. & EI-Sayyad, H. I. H. (1995): Effect of some non-steroidal anti-inflammatory drugs on the testis of albino rat. J. Egypt. Ger. Soc. ZooL, 16(C): 57-69.
95. El-Sayyad, H. I. H. (1994): Histological and histochemical changes during tongue development in mouse embryos maternally with thoidicarb. J. Egypt. Ger. Soc. Zool, 13(B): 55-78.
96. EI-Sayyad, H. I. H. (1994): Histological and histochemical studies on skin of newly born albino rat maternally treated with- methoxsalen. J. Union Arab Biologists 2 (A): 417-451.
97. El-Sayyad, H. I. H. (1994): Histological effects of thiodicarb on the reproductive system of adult female mouse. J. Egypt. Ger. Soc. ZooL, 13(C): 47-65.
98. Kariem, SA, EI-Sayyad, H.I. & EI-Kenany, N.A. (1994): Effect of nickel sulphate on the regeneration of hind limb in tadoples of the toad, Bufo viridis var orientalis. I. Foot region. J. Egypt. Ger. Soc. Zool., 14 (B): 123-146.
99. El-Sayyad, H. I. & El-Shershaby, E.M. (1994): Histological and histochemical studies on the effect profenofos, cobalt and lead on testis of albino mice. J.Egypt. Ger. Soc. ZooL, 17(C): 43-64.
100. El-Sayyad, H. I. & El-Shershaby, E.M. (1994): Abnormal epidermal development, in rat fetuses and offsprings maternally treated with a chitin systhesis inliibitor XRD-473. J.Egypt. Ger. Soc. ZooL, 14(B): 227-256.
101. Abou-EgIa, M.H., EI-Sayyad, H.I., Othman, A.E. and EI-Mandouh, S.M. (1994): Chondrodystrophy of femoral neck of virgin female, and pregnant mice post-thiodicarb-treatment. Mans. J.Environ. Sci. 7: 171-190.
102. EI-Sayyad, H.I., Abou-Egla, M.H., Othman, A.E. & El- Mandouh, S.M.A. (1994): Teratogenic effects of thiodicarb (Carbamate insecticide) on pregnant mice and their offsprings. J. Egypt. Ger. Soc. Zool., 13 (B): 115-146.
103. EI-Sayyad, H.I., Abou-EgIa, M.H, Othman, A.E. & EI-Mandouh, S.M.A. (1994): Effect of thiodicaab (Carbamate insecticide) on lungs of virgin females, pregnants and their offsprings in mice. J. Egypt. Ger. Soc. Zool., 13 (B): 79-99.
104. Ibrahim, H.A., EI-Sayyad, H.I. & Abou-Refae, H.H.(1993): Skeletal abormalities induced by gamma irradiation during embryogenesis of rat. Mans.J. Environ. Sci, 6: 225-268.
105. El-Sayyad, H. I. H. & Ghanem, A.A. (1993): Teratogenic effects of 6 alpha methyl-17-alphahydroxy progesterone acetate (Depoprovera 150) on chick embryonic.Mans. J. Environ. Sci., 7:191- 208.
106. El-Sayyad, H. I. & EI-Sherbini, S. A. (1993): Effect of thiodicarb (Carbamate insecticide) on the intestine of mouse embryos. Egypt. J. Histol., 16(1): 259-271.
107. El-Sayyad, H. I. & EI-Sherbini, S. A. (1993): Patterm formation of skin during embryonic development of mice post-w.thiodicarb-treatment. Egypt. J. Histol. 16(1): 239-257.
108. Abou-EgIa, M.H., EI-Sayyad, H.I., Ibrahim, H.A. and EI- Sabagh, A.M.A. (1993): Effects of fenvalerate and phosfolan- treatment on the histological picture of some organs of non-pregnant and pregnant rats and their newbom. J. K.A.U. Sci. (K.S.A) 5: 77-94.
109. El-Sayyad, H. I. & El-Kholy, W. M. (1992): Histological and histochemical studies on the efficacy of zinc chloride against chromium injuries in femoral neck of female rats. J. Egypt. Ger. Soc. Zool, 10 (C): 243-256.
110. El-Kholy, W. M. & El-Sayyad, H. I. (1992): Zinc as a protector against trivalent chromium induced toxicity in female rats J. Egypt. Ger. Soc. Zool, 7 (C): 223-244.
111. EI-Sayyad, H. I. & El-Kholy, W.M. (1992): lung disease in chromiuum-treated female rats and possible trials of protection by zinc chloride. Mans.J. Environ. Sci., 4: 53-67.
112. Ibrahim, H.A., Abou-EgIa, M.H, EI-Sayyad, H.I. & EI-Gammal, H.L. (1991): Effect of chloropyrifos, methamidophos and sulprofos on myelin sheath development of chick embryos. J. Eviron. Sci. 2: 245-262.
113. EI-Sayyad, H.I., Abou-EgIa, M.H., Ibrahim, H.A. & EI-Sabagh, A.A. (1991): Histological changes in the femoral neck of non-pregnant and pregnant rats after phosfolan fenvalerate- treatment. Mans. Sci. Bull., 19 (2): 391-405.
114. El-Sayyad, H. I., Khalifa, S.S.A & El-Gawit, A. (1989): Effect of some antirheumatic drugs on liver, kidney and heart of female rats. Mans. Sci. Bull., 16(2): 133-151.
115. El-Sayyad, H. I. H., EI-Kboly.W & EI-Gawit, A. (1988): Studies on the side effect of piroxicam, dicolfenac and indomethacin in female rats. Mans. Sci. Bull., 15(2): 315-330.
117. Abou-EgIa ,M.H, EI-Sayyad ,H.1.H., & Shata T.R. (1988): Impairment of liver functions in Y -irradiated male rat Mans. Sci. Bull. 15(2): 281-297.
118. EI-Sayyad, H.I., Abou-EgIa, M.H. & Shata, T.R. (1988). Gamma irradiation induced testis dsfunction in rats. Mans. Sci. Bull., 15 (2): 299-314.
119. EI-Sayyad, H.l., Ghanem, A. & EI-Shershaby, E.M. (1987): Comparative teratological study of cyclosporine A on chick embryos and newborn rats. Proc. Zool. Soc. A.R. Egypt., PP: 95- 104.
120. EI-Shershaby, E.M. & EI-Sayyad, H.I.H. (1987): Normal growth pattern during embryogenesis of mice. Bull. Sci. Mans. Univ., 14 (2): 263-277.
121. EI-Sayyad, H.I.H. (1986): The side effects of chloropyrifos (Dursban) on mice and rat mothers and their newborn. Histopathological studies in liver and renal tissues. Bull. Sci. Mans. Univ., 14(2): 279-288.
122. Ibrahim, H.A., EI-KboIy.W.M., EI-Sayyad, H.I. & Ghanem, A. (1986): Studies on the side effects of cyclosporine A on female hamster Proc. Zool. Soc. A.R.Egypt., pp : 39-48.
123. El-Shershaby, E.M. & EI-Sayyad, H.I. (1986): Histopathological and biochemical studies on the effect of niridazole on embryogenesis of mice . Mans. Sci. Bull., 13(2) : 679-691.
124. EI-Sayyad, H.I. and EI-Zanaty ,E.(1986): Protection against toxic effect of methamidophos in suckling rat by royal jelly . Mans. Sci. Bull. 13(1): 57-66.
125. EI-Sayyad, HI. and Ghanem ,A.A. (1986): Pancreatic disfunction of female rats after subcutaneous administration of cigarette smoking residues. Mans. Sci. Bull., 13 (I): 43-56.
126. EI-Sayyad, H.I. & Ghanem ,A.A.(1986): Testicular damage in rat after subcutaneous administration of cigarette smoking. residues. Mans.Sci. Bull. 13(1): 27-41.
127. EI-Sayyad, H.I. & El-Shershaby, E.M. (1986): Effect of fenvalerate - treatment on some organs in the mice. Mans. Sci. Bull. 13(2): 683-706.
128. Ibrahim, H.A. & EI-Sayyad, H.I. (1985): Histopathological studies on the effect of gamma radiation on the mother rats and its newborn. 1st. Egypt. Br. Rad. Protec. Symp. PP :190-194.
129. Ibrahim, HA., EI-Sayyad, H.I. and EI-Refae, H.T. (1985): Effect of gamma irradiation on embryogenesis of rat., 1st. Egypt. Br. Rad. Protec. Symp. PP : 195-198.
130. EI-Sayyad, HI., El-Shershaby, E.M. & EI-Defrawy, M.M. (1985): Effect of niridazole on pregnant mice, prenatal embryo and delivered newborn. 1st. int. Conf. Appi. Sci. IV.Zag. Univ., PP.173-207.
131. EI-Sayyad, H.I. & El-Shershaby, E.M.(1985): Morphological and histological studies on the effect of fenvalerate on chick-embryos. 1st. int. Conf. Appi. Sd. IV. Zag. Univ. PP.158-173.
132. EI-Shershaby, E-M., EI-Sayyad, H.I. & Abou-EgIa, M.H. (1985): Effect of nicotine-treatment on embryonic development of chick.. Mans Sci. Bull., 12 (I): 181-198.
133. Abou-EgIa, N.H., EI-Sayyad, H.I. & Kady, M.M. (1984):Effect of fenvalerate (Sumicidin) on suckling rat. J. Agric Sci. Mans. Univ., 9 (4): 818-825.
134. EI-Sayyad, H.I., Said, A.A.A. & Abou-EgIa, M.H. (1983): Fetal growth retardation in rats after oral administration of fenvalerate during Pregnancy. Proc. int. Conf. Env. Haz. Agrochem.ll: 1153-1167.

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