Prof. Elsayed Abou-Elfotowh Mohamed  Omer
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Prof. Elsayed Abou-Elfotowh Mohamed Omer

Emeritus Professor
National Research Centre, Egypt

Highest Degree
Ph.D. in Agricultural Chemistry from Hokkaido University, Japan

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Area of Interest:

Plant and Soil Sciences
Agricultural Chemistry
Crop Production
Plant Nutrition
Medicinal Plant

Research Publications in Numbers


Selected Publications

  1. Omer, E., A.I. Elshamy, M. Nassar, J. Shalom, A. White and I.E. Cock, 2019. Plantago squarrosa murray extracts inhibit the growth of some bacterial triggers of autoimmune diseases: GC–MS analysis of an inhibitory extract. Inflammopharmacology, 27: 373-385.
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  2. Shaheen, A.M., I.A. Saleh, E.A. El-Kashoury, W.A. Tawfik, E.A. Omer, M.E.F. Hegazy and E. Abdel-Sattar, 2018. Microwave-assisted extraction as an alternative tool for extraction of Stachys aegyptiaca essential oil. Egypt. Pharm. J., 16: 98-102.
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  3. Said, A., E.A. Omer, M.A.M. El-Gendy, G. Fawzy, A.E.A. EL-Kader and R. Fouad, 2018. Volatile constituents and cytotoxic activity of the fruits of Pleiogynium timorense (Dc.) Leenh. J. Mater. Environ. Sci., 9: 2274-2279.
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  4. Hendawy, S.F., A.G. El Gendy, E.A. Omer, L. Pistelli and L. Pistelli, 2018. Growth, yield and chemical composition of essential oil of Mentha piperita var. multimentha grown under different agro-ecological locations in Egypt. J. Essent. Oil Bear. Plants, 21: 23-39.
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  5. Bandeira, R.R.V., S. Nardoni, F. Mancianti, C. Anedda, A.E.N.G. El Gendy, E.A. Omer and L. Pistelli, 2018. Chemical composition and antifungal activity of essential oils from four Asteraceae plants grown in Egypt. Zeitschrift fur Naturforschung C J. Biosci., 73: 313-318.
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  6. Omer, E.A., S.F. Hendawy, R.F. Ismail, G.L. Petretto, J.P. Rourke and G. Pintore, 2017. Acclimatization study of Tagetes lucida L. in Egypt and the chemical characterization of its essential oils. Nat. Prod. Res., 31: 1509-1517.
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  7. El-Newary, S.A., M.S. Nermeen and E.A. Omer, 2017. The protection of Thymus vulgaris leaves alcoholic extract against hepatotoxicity of alcohol in rats. Asian Pac. J. Trop. Med., 10: 361-371.
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  8. El Gendy, A.N.G., S. Tavarini, G. Conte, L. Pistelli, S.F. Hendawy, E.A. Omer and L.G. Angelini, 2017. Yield and qualitative characterisation of seeds of Amaranthus hypochondriacus L. and Amaranthus cruentus L. grown in central Italy. Ital. J. Agron.,  Vol. 13. 10.4081/ija.2017.993.
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  9. El Gendy, A.E.N.G., A.M.A. El-Gawad, R.F. Taher, E.E.D.A.M. El-Khrisy, E.A. Omer and A.I. Elshamy, 2017. Essential oils constituents of aerial parts of Cyperus capitatus L. and Cyperus difformis L. grown wild in Egypt. J. Essent. Oil Bear. Plants, 20: 1659-1665.
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  10. Abdel-Haleem, S.A., A.Y. Ibrahim, R.F. Ismail, N.M. Shaffie, S.F. Hendawy and E.A. Omer, 2017. In-vivo hypoglycemic and hypolipidemic properties of Tagetes lucida alcoholic extract in streptozotocin-induced hyperglycemic Wistar albino rats. Anal. Agric. Sci., 62: 169-181.
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  11. Abdallah, W.E., A.F. Osman, A.G. El Gendy, K.A. Abdelshafeek and E.A. Omer, 2017. Different methods for extraction of some chemical constituents from different organs of Ipomea carneaDirect Link  |  
  12. Abdallah, H.M.I., A.I. Elshamy, A.E.N.G. El Gendy, A.M.A. El-Gawad, E.A. Omer, M. De Leo and L. Pistelli, 2017. Anti-inflammatory, antipyretic and antinociceptive effects of a Cressa cretica aqueous extract. Planta Med., 83: 1313-1320.
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  13. Abbas, H.M., F.M. Assem, W.M. Zaky, J.M. Kassem and E.A. Omer, 2017. Antioxidant, rheological and sensorial properties of ultra-filtrated soft cheese supplemented with basil essential oil. Int. J. Dairy Sci., 12: 301-309.
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  14. Said-Al Ahl, H.A.H., M. Abou-Ellail and E.A. Omer, 2016. Harvest date and genotype influences growth characters and essential oil production and composition of Petroselinum crispum plants. J. Chem. Pharmaceut. Res., 8: 992-1003.
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  15. Said-Al Ahl, H.A.H., A.G. El Gendy and E.A. Omer, 2016. Humic acid and Indole acetic acid affect yield and essential oil of dill grown under two different locations in Egypt. J. Pharm. Sci. Res., 8: 594-606.
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  16. Said-Al Ahl, H.A.H. and E.A. Omer, 2016. Impact of cultivar and harvest time on growth, production and essential oil of Anethum graveolens cultivated in Egypt. Int. J. Pharm. Pharmaceut. Sci., 8: 54-60.
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  17. Said-Al Ahl, H.A.H. and E.A. Omer, 2016. Essential oil content and chemical composition of eight dill (Anethum graveolens L.) cultivars cultivated under Egyptian conditions. Int. J. Pharm. Pharmaceut. Sci., 8: 227-231.
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  18. Omer, E.A., S.F. Hendawy, E.A.A. Hussein, A.G.E. Gendy and A.A. Ezz El-Din, 2016. Introduction of Artemisia species into the Egyptian cultivation. J. Essent. Oil Bear. Plants, 19: 793-805.
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  19. Omer, E.A., M.S. Hussein, A.R. Osman, E. Sewedan, A.I. Elgohary and A.M. Salman, 2016. Response of basil essential oil to cultivation date and organic fertilization. Int. J. PharmTech Res., 9: 86-98.
  20. Omer, E., A. Elshamy, A.N. El Gendy, X. Cai, J. Sirdaarta, A. White and I.E. Cock, 2016. Cakile maritime Scop. extracts inhibit the growth of some bacterial triggers of autoimmune diseases: GC-MS analysis of an inhibitory extract. Pharmacog. J., 8: 361-374.
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  21. Ibrahim, A.Y., S.F. Hendawy, A.A. Elsayed and E.A. Omer, 2016. Evaluation of hypolipidemic Marrubium vulgare effect in Triton WR-1339-induced hyperlipidemia in mice. Asian Pac. J. Trop. Med., 9: 453-459.
  22. Abd El-Gawad, A.M., A.G. El Gendy, A.I. Elshamy and E.A. Omer, 2016. Chemical composition of the essential oil of Trianthema portulacastrum L. aerial parts and potential antimicrobial and phytotoxic activities of its extract. J. Essential Oil Bearing Plants, 19: 1684-1692.
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  23. Said-Al Ahl, H.A.H., A.S.H. Gendy, A.S. Sabra, E.A. Omer and K.G. Tkachenko, 2015. First report of Nepeta grandiflora grown in Egypt. Int. J. Life Sci. Eng., 1: 93-96.
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  24. Perez, A.J., E.M. Hassan, L> Pecio, E.A. Omer, M. Kucinska, M. Murias and A. Stochmal, 2015. Triterpenoid saponins and C-glycosyl flavones from stem bark of Erythrina abyssinica Lam and their cytotoxic effects. Phytochem. Lett., 13: 59-67.
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  25. Omer, E.A., S.F. Hendawy, A.M. Nour El-Deen, F.N. Zaki and M.M. Abd-Elgawad et al., 2015. Some biological activities of Tagetes lucida Plant cultivated in Egypt. Adv. Environ. Biol., 9: 82-88.
  26. Khalid, K.A., E.A. Omer, A.G. El Gendy and M.S.H. Hussein, 2015. Impact of organic compost and humic acid on essential oil composition of sweet fennel (Foeniculum vulgare var. Dulce) under sandy soil conditions in Egypt. World J. Pharmaceut. Sci., 3: 160-166.
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  27. Hendawy, S.F., A.G. El-Gendy, E.A. Omer, A.E. El Gohary, M.S. Hussein and K. Danova, 2015. Evaluation of biomass formation, essential oil yield and composition of four different Matricaria recutita L. cultivars grown in Egypt. World J. Pharm. Sci., 3: 830-839.
  28. El Gendy, A.N., M. Leonardi, L. Mugnaini, F. Bertelloni and V.V. Ebani et al., 2015. Chemical composition and antimicrobial activity of essential oil of wild and cultivated Origanum syriacum plants grown in Sinai, Egypt. Ind. Crops Prod., 67: 201-207.
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  29. El Gendy, A.G., A.E. El Gohary, E.A. Omer, S.F. Hendawy, M.S. Hussein, V. Petrova and I. Stancheva, 2015. Effect of nitrogen and potassium fertilizer on herbage and oil yield of chervil plant (Anthriscus cerefolium L.). Ind. Crops Prod., 69: 167-174.
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  30. Abd El-Aziz, S.E., H. Abdel Rahman, E.A. Omar, E.A. Abdel-Hakim and S.F. Fahim, 2015. Identification of main constituents of date odour and their behavioural activity against Ephestia cautella in white sticky traps. Int. J. ChemTech Res., 8: 565-573.
  31. Zeid, F.A., E.A. Omer, A.Y. Amin and S.A. Hanafy, 2014. Effect of putrescine and salicylic acid on Ajwain plant (Trachyspermum ammi) at vegetative stage grown under drought stress. Int. J. Agric. Sci. Res., 4: 61-80.
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  32. Said-Al Ahl, H.A.H., A.G. El Gendy and E.A. Omer, 2014. Effect of ascorbic acid, salicylic acid on coriander productivity and essential oil cultivated in two different locations. Adv. Environ. Biol., 8: 2236-2250.
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  33. Petretto, G.L., F. Fancello, S. Zara, M. Foddai and N.P. Mangia et al., 2014. Antimicrobial activity against beneficial microorganisms and chemical composition of essential oil of Mentha suaveolens ssp. insularis grown in Sardinia. J. Food Sci., 79: M369-M377.
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  34. Omer, E.A., H.A.H. Said-Al Ahl and A.G. El Gendy, 2014. Yield and essential oil of Ajwain (Trachyspermum ammi) plant cultivated in saline soil of North Sinai in Egypt. J. Essent. Oil Bearing Plants, 17: 469-477.
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  35. Omer, E.A., H.A.H. Said-Al Ahl and A.G. El Gendy, 2014. Productivity and essential oil of Foeniculum vulgare cultivated under soil salinity in Sinai comparing to non saline soil in Giza, Egypt. J. Plant Physiol., 115: 217-227.
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  36. Omer, E.A., E.A. Abou Hussein, S.F. Hendawy and A.A. Ezz El-din and A.G. El-Gendy, 2014. Introduction of three different Artemisia species into the Egyptian cultivation. J. Essential Oil Bear. Plants, 2: 11-20.
  37. Ibrahim, F.M., A.Y. Ibrahim and E.A. Omer, 2014. Potential effect of Marrubium vulgare L. extracts on CCL4 model induced hepatotoxicity in albino mice. World J. Pharm. Sci., 2: 1664-1670.
  38. Hassan, E.M., R.A. Hassan, S.A. El-Toumy, S.M. Mohamed and E.A. Omer, 2014. Phenolic Metaboloites and antioxidant activity of Codiaeum variegatum CV. spirale. J. Pharm. Res., 8: 619-623.
  39. Abdel Rahman, H., S.E. Abd-El-Aziz, E.A. Omar, E.A. Abdel-Hakim and S.F. Fahim, 2014. Olfaction cues of food odours influencing behavior response of the red flour beetle, Tribolium castanium (Herbst)(Coleoptera: Tenebrionidae). Bull. NRC., 39: 1-11.
  40. Omer, E.A., H.A.H. Said-Al Ahl, A.G. El Gendy, K.A. Shaban and M.S. Hussein, 2013. Effect of amino acids application on production, volatile oil and chemical composition of chamomile cultivated in saline soil at Sinai. J. Applied Sci. Res., 9: 3006-3021.
  41. Omer, E.A., E.A. Abou Hussein, S.F. Hendawy, E.D. Ezz, A. Azza and A.G. El Gendy, 2013. Effect of soil type and seasonal variation on growth, yield, essential oil and artemisinin content of Artemisia annua L. Int. Res. J. Horticult., 5: 46-59.
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  42. Ismail, R.F., A.M. Kandeel, A.K. Ibrahim and E.A. Omer, 2013. Effect of planting date and plant spacing on growth, yield and essential oil o Mexican marigold (Tagetes lucida L) cultivated in Egypt. J. Applied Sci. Res., 9: 330-340.
  43. El-Leithy, A.S., S.H. El-Hanafy, E.A. Omer and A.A.A. El-Sayed, 2013. Effect of nitrogen and potassium biofertilization on growth yield and essential oil production of white horehound Marrubium vulgare L. J. Hortic. Sci. Ornamen Plants, 5: 46-59.
  44. Bakr, R.O., E.A. Omer, K.A.A. EL-Razik, A.S.M. A. Elnaga, E.N. Danial and A.E.G. Elgindy, 2013. Antioxidant and anti-listerial activities of selected Egyptian medicinal plant. Afr. J. Microbiol. Res., 7: 4590-4595.
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  45. El-Aziz, S.E.A., H.A. Rahman, E.A. Omer, E.A. Abdel-Hakim and S.F. Fahim, 2012. Olfaction cues of food odours influencing behavior response of the almond moth, Ephestia cautella (Walker)(Lepidoptera: Pyralidae). Egypt. J. Biol. Pest Control, 22: 45-50.
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  46. Viuda-Martos, M., M.A. Mohamady, M. Fernandez-Lopez, K.A. Abd El-Razik, E.A. Omer, J.A. Perez-Alvarez and E. Sendra, 2011. In vitro antioxidant and antibacterial activities of essentialoils obtained from Egyptian aromatic plants. Food Control, 22: 1715-1722.
  47. Shahat, A.A., A.Y. Ibrahim, S.S. Hendawy, E.A. Omar, F.M. Hammoud, F. Abdel-Rahman and M.A. Saleh, 2011. Chemical composition and biological evaluation of essential oils from three Egyptian organic cultivation fennel verities. Molecules, 16: 1366-1377.
  48. Said-Al Ahl, H.A.H. and E.A. Omer, 2011. Medicinal and aromatic plants production under salt stress. A review. Herba Polonica, 57: 72-87.
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  49. Khattab, M.E., E.A. Omer and A.A. Youssef, 2011. Growth parameters, yield, quality and chemical composition of lemon basil as influenced by foliar spray with molybdenum and cystine. Egypt. Pharm. J., 10: 167-185.
  50. Viuda-Martos, M., A.E.N.G.S. El Gendy, E. Sendra, J. Fernandez-Lopez, K.A. Abd El Razik, E.A. Omer and J.A. Perez-Alvarez, 2010. Chemical composition and antioxidant and anti-Listeria activities of essential oils obtained from some Egyptian plants. J. Agric. Food Chem., 58: 9063-9070.
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  51. Hendawy, S.F., A.E. El-Din, E.E. Aziz and E.A. Omer, 2010. Productivity and oil quality of Thymus vulgaris L. under organic fertilization conditions. Ozean J. Applied Sci., 3: 203-216.
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  52. Ezz El-Din, A.A., S.F. Hendawy, E.E. Aziz and E.A. Omer, 2010. Enhancing growth, yield and essential oil of caraway plants by nitrogen and potassium fertilizers. Int. J. Acad. Res., 2: 192-197.
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  53. El-Din, A.A.E., E.E. Aziz, S.F. Hendawy and E.A. Omer, 2010. Impact of phosphorus nutrition and number of cuttings on growth, yield and active constituents of artichoke. Int. J. Acad. Res., 2: 240-244.
  54. Aziz, E.E., A.A.E. El-Din and E.A. Omer, 2010. Influence of zinc and iron on plant growth and chemical constituents of Cymbopogon citratus L. grown in newly reclaimed land. Int. J. Acad. Res., 2: 278-283.
  55. Aziz, E.E., A.A. Ezz El-Din and E.A. Omer, 2010. Quantitative and qualitative changes in essential oil of Dracocephalum moldavica at different growth stages. Int. J. Acad. Res., 2: 198-203.
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  56. Said-Al Ahl, H.A.H., M.A.A. Abdou and E.A. Omer, 2009. Effect of potassium fertilizer on lemon balm (Melissa officinalis L.) grown under water stress conditions. J. Med. Food Plants, 1: 16-29.
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  57. Said-Al Ahl, H.A.H., E.A. Omer and N.Y. Naguib, 2009. Effect of water stress and nitrogen fertilizer on herb and essential oil of oregano. Int. Agrophys., 23: 269-275.
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  58. Said-Al Ahl, H.A.H. and E.A. Omer, 2009. Effect of spraying with zinc and/or iron on growth and chemical composition of coriander (Coriandrum sativum L.) harvested at three stages of development. J. Med. Food Plants, 1: 30-46.
  59. Mohamed, S.M. and E.A. Omer, 2009. Seasonal variation in the volatile oil of Myoporum laetum leaves. Med. Aromatic Plant Sci. Biotechnol., 3: 50-51.
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  60. Ezz-El-Din, A.A., E.E. Aziz, S.F. Hendawi and E.A. Omer, 2009. Response of Thymus vulgaris L. to salt stress and Allar (B9) in newly reclaimed soil. J. Applied Sci. Res., 5: 2165-2170.
  61. El-Sayed, A.A., A.M. Abdalla, E.A. Omer, M.A. Darwish and S.I.M. Elsayed, 2009. Response of growth, yield and essential oil of Celery to partial or complete organic fertilization. Egypt. J. Applied Sci., 24: 673-682.
  62. Omer, E.A., H.A.H. Said-Al Ahl and S.F. Hendawy, 2008. Production, chemical composition and volatile oil of different basil species/varieties cultivated under Egyptian soil salinity conditions. Res. J. Agric. Biol. Sci., 4: 293-300.
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  63. Omer, E.A., A.G.A. ElSayed, A. El-Lathy, M.A. Khattab and S.A. Sabra, 2008. Effect of the nitrogen fertilizer forms and time of their application on the yield of herb and essential oil of Ocimum americanum L. Herba Polonica, 54: 34-46.
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  64. Omer, A.E., A.A. El-Sayed, A.S. El-Leithy, M.E. Khattab and A.M. Sabra, 2008. Nitrogen fertilizer influences yield and essential oil of Ocimum americanum L cultivated in Egypt. Egypt. Pharm. J. NRC, 7: 147-166.
  65. El-Daly, E.S., L.M. Abou-Setta, E.A. Omer and E.M. Khalil, 2008. Technological studies on the essential oil of coriander. Egypt. Pharm. J. (NRC), 1: 1-10.
  66. Aziz, E.E., S.F. Hendawy, E.E.D. Azza and E.A. Omer, 2008. Effect of soil type and irrigation intervals on plant growth, essential oil yield and constituents of Thymus vulgaris plant. Am.-Eurasian J. Agric. Environ. Sci., 4: 443-450.
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  67. Shadia, E., Abd El-Aziz, E.A. Omer and A.S. Sabra, 2007. Chemical composition of Ocimum americanum essential oil and its biological effects against, Agrotis ipsilon, (Lepidoptera: Noctuidae). Res. J. Agric. Biol. Sci., 3: 740-747.
  68. Ottai, M.E.S., E.A. Omer and M.S.H. El-Shorbagy, 2005. Genetic variability, biological activity and lipid composition of three Nigella sativa L. cultivars. Egypt. Pharm. J. NRC., 4: 112-118.
  69. Youssef, A.A., M.E. Khattab and E.A. Omer, 2004. Effect of spraying of molybdenum and tyrosine on growth, yield and chemical composition of lemon basil plant. Egypt. Pharm. J. NRC, 3: 87-106.
  70. Ewing, E.E., I. Simko, E.A. Omer and P.J. Davies, 2004. Polygene mapping as a tool to study the physiology of potato tuberization and dormancy. Am. J. Potato Res., 81: 281-289.
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  71. Eissa, A.M., A. F. Abou- Haddid and E.A. Omer, 2004. Effect of saline water irrigation on the dry matter production, nutritional statue and essential oil content of thyme plants (Thymus vulgaris) grown in sandy soil. Egyp. J. Hortic., 31: 59-69.
  72. Abdalla, A.H. and E.A. Omer, 2003. Evaluation of three garlic cultivars (Egyptian, Chinese and Elephant garlic) for their vegetative growth, yield and volatile oil components. Egypt. J. Applied Sci., 18: 296-303.
  73. Kandil, M.A.M.H., A. Salah, E.S.E. Omer, M. El-Gala, C. Sator and E. Schnug, 2002. Fruit and essential oil yield of fennel (Foeniculum vulgare Mill.) grown with fertilizer sources for organic farming in Egypt. Landbauforschung Volkenrode, 52: 135-139.
  74. El-Gendy, S.A., A.M. Hosni and S.S. Ahmed, 2001. Variation in herbage yield, essential oil yield and oil composition of sweet basil (Ocimum basilicum L.) var. grande verde grown organically in a newly reclaimed land in Egypt. Arab Univ. J. Agric. Sci., 9: 915-933.
  75. Omer, E.A., S.S. Ahmed, B.T. Fayed and A.A. Ezz-Eldin, 1999. Seed yield of Silybum marianum L. as affected by row spacing and fertilization in new reclaimed lands. Egypt. J. Hortic., 25: 281-293.
  76. Omer, E.A., 1999. Response of wild Egyptian oregano (Origanum syriacum Var. aegyptiaca) to nitrogen fertilization in sandy soil. J. Plant Nutr., 22: 103-114.
  77. Khattab, M.E. and E.A. Omer, 1999. Influence of excessive fertilization with micronutrients on the growth yield essential oil and micro elements of some apiaceae plants. Egypt J. Hortic., 26: 249-266.
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  78. Abou-Hadid, A.F., M.Z. El-Shinawy and E.A. Omer, 1999. Cultivation of garlic in nutrient film technique (NFT). Egypt. J. Hortic., 25: 271-280.
  79. Youssef, A.A., I.M. Talaat and E.A. Omer, 1998. Physiological response of basil green ruffles (Ocimum basilicum) to nitrogen fertilization in different soil types. Egypt. J. Hortic., 25: 253-269.
  80. Omer, E.A., M.E. Khattab and M.E. Ibrahim, 1998. Production and volatile oil of new four cultivars of basil (Ocimum basilicum L.) cultivated in Egypt. Indian Perfumer, 42: 49-57.
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  81. Omer, E.A., M.E. Khattab and M.E. Ibrahim, 1998. First cultivation trial of Perilla frutescens L. in Egypt. Flavour Fragrance J., 13: 221-225.
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  82. Matsura, H., K. Nakamori, E.A. Omer, C. Hatakeyama, T. Yoshihara and A. Ichihara, 1998. Three lasiodiplodins from Lasiodiplodia theobromae IFO 31059. Phytochemistry, 49: 579-584.
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  83. Dawh, A.K., E.A. Omer and E.M. Rashed, 1998. Yield of leaf and oil of Tagetes erecta as affected by salinity and growth regulators. Egypt. J. Hortic., 2: 145-165.
  84. Saleh, M.M., G.H. Mahran, M.M. El-Sherai, H.M. Motawe, E.A. Omer and M.H. Grace, 1997. Constituents of Petalania fascia (Muller) kuntze: Lipoids, proteins, carbohydrates, halogens, minerals and trace elements. Bull NRC., 22: 215-220.
  85. Omer, E.A., Z.E. El-Bazza and Z.G. Eggbo, 1997. Constituentes and biolgical activites of volatile oils of some lamiacae plants as affected by irridiation. Egypt. J. Hortic., 24: 175-196.
  86. Omer, E.A., M.E. Khattab and M.E. Ibrahim, 1997. Effect of pinching and foliar application of some growth regulators on two new early mature varieties of Hibiscus sabdariffa. Egypt. J. Hortic., 24: 117-130.
  87. Omer, E.A., M.A. Nofal, S.M. Lashin and W.M. Haggag, 1997. Effect of some growth regulators on growth parameters and oil content of cumin wilt disease incidence under two types of soil. Egypt J. Hortic., 24: 29-41.
  88. Omer, E.A., A.A. Youssef, E.N. Abo-Zeid and A.M. Sharaby, 1997. Biochemical studies on the essential oils of Balady orange and mandarin. Egypt. J. Hortic., 24: 207-218.
  89. Hassan, S.M., N. Abou-Tahleb, E.A. Omer and A.M. Eissa, 1997. Response of Origanum syriacum to foliar application of urea and cycocel. Zagazig J. Agric. Res., 24: 785-803.
  90. El-Sayed, O.H., W. Bolan, E.A. Omer and S.F. Mohamed, 1997. Volatiles and Pheromones of brown alge (Sargassum latifolium and Sargassum asperfolium). Bull NRC., 22: 201-213.
  91. Abo El-Seoud, M.A., M.F. Abdel-Sabour and E.A. Omer, 1997. Productivity of roselle (Hibiscus sabdariffa L) plant as affected by organic-waste compost addition to sandy soil. Bull. NRC Egypt, 22: 495-505.
  92. Shimko, I., E. A. Omer, E. E. Ewing, S. McMurry, J. L. Koch and P.J. Davies, 1996. Tuberonic (12-OH-Jasmonic) acid glucoside and its methyl ester in potato. Phytochemistry, 43: 727-730.
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  93. Ouda, H.E., B.S. El-Menshawi, E.A. Omer and M. Shehata, 1996. Introduction of the molluscicidal plant Phytolacca dodecandra to Egypt. Acta Hortic., 434: 429-432.
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  94. Omer, E.A., B.S. El-Menshawi, M. Edris and A.F. Abou-Hadid, 1996. Micro propagation of Phytolacca dodecandra L. Herit. Acta Hortic., 434: 353-360.
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  95. Omer, E.A., 1996. Effect of different nitrogen sources on Romanian Silybum marianum cultivated in sandy and clay soils. Egypt. J. Hortic., 23: 63-67.
  96. Ibrahim, M.E., E.A. Omer, M. Khatab and S.S. Ahmed, 1996. Introducction of Tagetes minuta to the Egyptian cultivation. Egypt. J. Hortic., 23: 237-244.
  97. El-Saeid, H.M., M.S. Hussein, S.H. El-Sherbeny and E.A. Omer, 1996. Effect of nitrogen on yield and active consituents of Tagetes pattula. Egypt. J. Hortic., 23: 101-112.
  98. Saeed, A.A., G.M. Wassel and E.A. Omer, 1995. The essential oil of Nymphia hybrida Tach. V. and Nelombo nucifera Gertn. Egypt. J. Pharm., 36: 353-359.
  99. Omer, E.A., M.E. Ibrahim, A.M. Razin and S.S. Ahmed, 1995. Effect of spacing, nitrogen and potassium fertilization of Silybum marianum L. cultivated in newly reclined lands. Egyp. J. Hortic., 22: 97-108.
  100. Hussein, M.S., H.M. El-Saied and E.A. Omer, 1995. Development of growth and yield of some lines of Chinese garlic. Egypt. J. Hort., 22: 19-30.
  101. Abdel-Aziz, S.H. and E.A. Omer, 1995. Bio-evaluation of Dodonaea viscosa L. JACQ. extracts on the cotton leaf worm, Spodoptera littoralis (BIOSD), as indicated by life table parameters. Ann. Agric. Sci. Ain-Shams Univ. Cairo, 40: 891-900.
  102. Abd- Elgawad, M.M. and E.A. Omer, 1995. Effect of essential oil of some medicinal plants on phytonemateodes. Anzeiger Fur Schadlineskunde Pflanzen-U. Umweltschutz, 68: 79-81.
  103. Saeed, A. and E.A. Omer, 1994. Study of the mucilage and free sugars of Nymphaea hybrida (Tach.. V) and Nelumbo nucifera (Gaert). Bull. Fac. Pharm. Cairo Univ., 32: 138-185.
  104. Razin, A.M. and E.A. Omer, 1994. Effect of water regime on the growth, flower yield and volatile oil content of marigold (Tagetes patula). Egypt. J. Hortic., 21: 195-202.
  105. Omer, E.A., D.L. Smith, K.V. Wood and B.S. El-Menshawi, 1994. The volatiles of desert truffle: Tirmania nivea. Plant Foods Hum. Nutr., 45: 247-249.
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  106. Mahran, G.H., M.M. Saleh, M.M. Elsherei, M.M. Motawe, E.A. Omer and M.H. Grace, 1994. Volatile and phenolic constituents of Petalonia facia (muller) Kurtze. Zagazig J. Pharm. Sci., 3: 242-250.
  107. Ibrahim, N., A. Saeed, S. Bashandy and E. Omer, 1994. Mucilage and lipid constituents of Balanites aegyptiaca Del. and their biological evaluation. Bull. Fac. Pharm. (Cairo Univ.), 32: 411-414.
  108. Homer, E.A., H.E. Ouda and S.S. Ahmed, 1994. Cultivation of sweet marjoram, Marjorana hortensis, in newly reclaimed lands of Egypt. J. Herbs Spices Med. Plants, 2: 9-16.
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  109. Saeed, A., E. Omer and A. Hashem, 1993. Investigation of lipids and biological activity of Nymphaea hybrida V. and Nelubo nucifera, Gaertn. Bull. Fac. Pharm. Cairo Univ., 31: 347-351.
  110. Refeaat, A.M., E.A. Omer and S.S. Ahmed, 1993. Effect of fertilization and plant desnsity on the productivity of Romanian safflower grown in Egypt. Egypt. J. Hort., 20: 23-28.
  111. Omer, E.A., H.E. Wahba and H.E. Ouda, 1993. Seasonal variation of the essential oil of Schinus terebenthifolius R. Egypt. J. Applied Sci., 8: 770-779.
  112. Omer, E.A., A.M. Refaat, S.S. Ahmed, A. Kamel and F.M. Hammouda, 1993. Effect of spacing and fertilization on the yield and active constituents of Silybum marianum. J. Herbs Spices Med. Plants, 1: 17-23.
  113. Omer, E.A., A.M. Razin and S.S. Ahmed, 1993. Effect of cutting, phosphorus and potassium fertilizzation on guar plant (Cyamoposis tetragonoloba) in newly reclaimed soil in Egypt. Plant Foods Hum. Nutr., 44: 277-284.
  114. Razin, A.M., E.A. Omer, A.M. Refeat and H.E. Ouda, 1992. Response of Thymus vulgaris L. to foliar fertilization with some micronutrients. Egypt. J. Applied Sci., 7: 614-624.
  115. Omer, E.A., A.M. Refaat, H.E. Ouda and S.S. Ahmed, 1992. A comparative study on the Egyptian and Romanian Mentha viridis and Mentha piperita grown in Egypt. Bull. Nat. Res. Cent. Egypt, 17: 213-219.
  116. Omer, E.A., 1992. Effect of zink and manganese spraying on the growth, yield, essential oil and pigments of Tagetes patula. Bull. Nat. Res. Cent. Egypt, 17: 205-212.
  117. Omer, E.A. and Abou-Hadid, 1992. Evaluation of some lines of Chines garlic comparing with Blady Cultivar. Egypt. J. Hort., 19: 161-169.
  118. Mohamed, S.M., H. El-Wahba and E.A. Omer, 1992. Effect of some growth regulators on the growth, oil prercentage and constituents of Alpina nutans (Hort.). Ann. Agric. Sci. Moshtohor, 30: 1501-1513.
  119. Ibrahim, M.E., S. Taraf, E.A. Omer and K.A. Turky, 1992. Response of growth, yield and essential oil of Mentha piperita L. to some growth regulators. Zagazig J. Agric. Res., 19: 1855-1868.
  120. Elgingaihi, S.E., Motawa, E.A. Omer and Z.E. El-Bazza, 1992. Chemical and biological studies on Vitex agnus-costus L. volatile oils. Indian Perfumer, 36: 293-296.
  121. Abdel-Gawad, A., E.A. Omer and S.S. Ahmed, 1992. Effect of storage on the glyco-alkaloids and carbohydrate contents in different potato varieties. Egypt. J. Hort., 19: 81-92.
  122. Omer, E.A., H.E. Ouda and Z.E. El-Bazza, 1991. Chemical composition and aflatoxigenic activity of the essential oils of Mentha longifolia L. and Laurus nobilis L. Egypt. J. Applied Sci., 6: 32-37.
  123. El-Bahr, M.K., S.A. Ghanem and E.A. Omer, 1990. Responses of Datura metel L. cell cultures to some amion acids. Egypt. J. Applied Sci., 5: 192-199.
  124. Yoshihara, T., E.A. Omer, H. Koshino, S. Sakamura, Y. Kikuta and Y. Koda, 1989. Structure of a tuber-inducting stimulus from potato leaves (Solanum tuberosum L). Agric. Biol. Chem., 53: 2835-2837.
  125. Ghanim, S.A., E.A. Omer and M.K. El-Bahr, 1989. Growth, pigments content and alkaloidal production in Datura metel L. cell cultures. Afr. J. Agric. Sci., 16: 185-197.
  126. Koda, Y., E.A. Omer, T. Yoshihara, H. Shibata, S. Sakamura and Y. Okazawa, 1988. Isolation of a specific potato tuber-inducing substance from potato leaves. Plant Cell Physiol., 29: 1047-1051.
  127. Ahmed, S.S., A. Abdel-Gawad, E.A. Omer and A.S. El-Ballal, 1988. Variety-environmental interaction in solainine and a-chaconine content in potato plants grown in Egypt. Egypt. J. Hort., 15: 201-212.
  128. Ibrahim, M.E., S.S. Ahmed, M.M. Badar El-Din and E.A. Omer, 1984. Seasonal changes in growth and chromones in different parts of Ammi visnagea L. plant. Egypt. J. Hort., 11: 191-200.
  129. Ahmed, S.S., K. Muller and E.A. Omer, 1983. Seasonal changes in a-tomatine content in fruits of tomato plants. Bull. Nat. Res. Cent., 8: 121-124.
  130. Ahmed, S.S., A.S. Shalaby and E.A. Omer, 1983. Effect of irrigation and plant density on growth, fruit production and active principles of Ammi visnaga L. plant. Egypt. J. Hort., 10: 93-100.
  131. Ibrahim, M.E., M.M. Badar El-Din, S.S. Ahmed and E.A. Omer, 1982. Yield and composition of Ammi visnaga L. in relation to nitrogen and phophorus supply and plant analysis. Res. Bull. Fac. Agric. Ain-Shams Univ., 1746: 1-20.