·         Ashy MA, Abd Elgalil K, Abou-Zeid AA and Abulnaja K O (1981). Utilization of cheese whey in production of milk-clotting enzymes. Agricultural Wastes, 3, 277-284.

·         Abou-Zeid AA, Khan JA and Abulnaja KO (1993). Oxytetracycline formation in blackstrap molasses medium by Streptomyces rimosus. Zentralbl Mikrobiol., 148: 351-6.

·         Abou-Zeid AA, Khan JA and Abulnaja K O (1995). On methods for reduction of nucleic acids content in a single-cell protein from gas oil. Bioresource Technology, 52: 21-4.

·         Abulnaja KO (1997). Utilization of date-seed oil in production of tetracycline and chlortetracycline by Streptomyces aureofaciens ATCC-10762. Alex. J. Pharm. Sci., 11 (1): 17-21.

·         Abulnaja KO and Abou-Zeid AA (1993). Utilization of palm-tree compound leaves in formation of cellulases. Bioresource Technology. 44: 255-7.

·         Abulnaja KO and Harwood JL (1991) Effect of a safener towards thiocarbamates on metabolism. Z. Naturforsch. 46: 931-3.

·         Abulnaja KO and Harwood JL (1991). Thiocarbamates herbicides inhibit fatty acid elongation in a variety of monocotyledons. Phytochemistry, 30(5):1445-1447.

·         Abulnaja KO and Harwood JL (1991). Interaction of thiocarbamates herbicides with fatty acid synthesis in germinating peas and their microsomal fractions. Phytochemistry. 30(9): 2883-7.

·         Abulnaja KO and Harwood JL (1992). Inhibition of fatty acid elongation provides a basis for the action of the herbicide, Ethofumesate, on surface wax formation. Phytochemistry. 31(4): 1155-9.

·         Abulnaja KO, El-Dardiry SA and Abduljabbar HA (1997). Preeclampsia: Sustained effects by hepatic predisposition. J Med Res Inst. 18(2): 65-71.

·         Abulnaja KO, El-Dardiry SA and Abduljabbar HA (1997). Influence of the past history of schistosomiasis on hemostatic alteration in pregnancy. J. Med. Res. Inst. 18(2): 13-8.  

·         El-Dardiry SA, Assem NM, Abulnaja KO, Halim hm. and Sharaf S (1996). Biochemical changes during recovery phase of hepatitis A and B: Influence of schistosomiasis in pediatrics. Alex. J. Pediatrics. 10(1): 51-9.

·         Khan JA, Abulnaja KO, kumosani TA and Abou-Zeid AA (1995).  Utilization of Saudi date sugar in production of baker's yeast. Bioresource Technology. 53:63-6.

·         Khan JA, Abulnaja KO, kumosani TA and Abou-Zeid AA (1997). Utilization of methanol in production of single cell protein by Hansenulla polymorpha. Biological Arab Union,

·         El-Dardiry SA, Assem NM, Abulnaja KO, El-Khatib MA, and Sharaf SA. (2000). Association between glycemic control, leptin's sexual dimorphism and atherogenic risk factors in cases with past history of schistosomiasis. Egypt J Biochem. 18(1):69-85.

·         El-Dardiry SA, Assem NM, Abulnaja KO, Shafshak S (2000). Impact of smoking on antioxidants status, trace elements homeostatis and cytokines in periodontitis. III International congress of federation of African societies of biochemistry and molecular biology FASBMB. 92-101.

·         El-Dardiry SA, Assem NM, Abulnaja KO, and Amr YA (2001) Haemostatic variations in male smokers with rheumatoid arthritis. Egypt J Biochem. 19(1&2):167-80.

·         El-Dardiry SA, Assem NM, Abulnaja KO, Galal A, Sharaf SA (2002). The role of environmental factors on plasma antioxidant status and lipid profile in schistosomal co-infection with viral hepatitis C and G. Egypt J Gastroenterol. 7(2):269-77.

·         El-Dardiry SA, Assem NM, Abulnaja KO, El-Marzouki AM, and Abou Freikha A(2002). Diabetes in pregnancy: influence on fetal development. J Med Res inst. 23(2):1-8.

·         El-Dardiry SA, Abulnaja KO, Bghdadi IM, Salman TA, Nosseir M and Kassem SM (2002). The antioxidant defence status in fasciola hepatica and schistosoma Mansoni infection. J Med Res inst. 23(3):27-37.

·         El-Dardiry SA, Assem NM, Abulnaja KO, Boghdadi IM and Kohail HM (2002). Hepatocellular carcinoma and angiogenic growth factors in cases with HCV and /or HbsAg coinfection. Egypt J Gastroenterol. 7(2):279-88. 

·         El-Dardiry SA, Abulnaja KO, El Batch MM, Kassem SM, Sharaf SA and El-Bassat HA. (2002). Environmental factors influencing chronic viral hepatitis infection of hepatosplenic schistosomal cases: impact of therapeutic regimen. Proceeding of the 12^th international conference on environmental protection is a must. 106-17.

·         Abulnaja KO and El-dardiry SA (2002). Influence of cigarette smoking and obesity in male infertility. Proceeding of the 12^th international conference on environmental protection is a must. 118-31.

·         El-Dardiry SA, Boghdadi IM, Abulnaja KO, Salman TA, Abdallah AA and Kassem S. (2002). Vascular endothelial damage and apoptosis in cases of HCV infection with type 2 diabetes mellitus.  Egypt J diabetes. 7(1):7-18.

·         El-Dardiry SA, Assem NM, Abulnaja KO, Abd El-Moneim F and Abu Freikha A (2002). Hepatoprotective effect of dimethyl diphenyl bicarboxylate (DDB) in oral contraceptive pill users with minor hepatobiliary disorders. Egypt J Biochem. 20(2):31-47.

·         Gashlan HM, Abulnaja KO and Walton TJ (2005). Effect of growth temperature transition on stereospecific distribution of fatty acids in Aphanizomenon sp. glycerolipids. J Biol Pharmaceut Sci. 3(1): 54-61.

·         Gashlan HM, Abulnaja KO and Walton TJ (2005). Growth characteristics and fatty acid composition of  Aphanizomenon sp. laboratory cultures growing at 15°C and 28°C. Egypt J Biomed Sci. 2(1): 26-34.

·         Abulnaja KO (2006). Osteoporosis: Influence of lifestyle and type-2 diabetes mellitus in middle aged men. Oxford Res Forum J. 2(3):21-36.

·         Abulnaja KO (2007). Impact of hypertension, smoking and liver affection on endothelial dysfunction and subsequent vascular damage in Saudi middle aged males. J Appl Biomed . 5:1-10.

·         Abulnaja KO, Gashlan HM, Walton TJ (2008). Effect of Environmental Temperature Transition on Fatty Acid Composition of Membrane Glycerolipids in Marine Cyanobacterium Aphanizomenon sp. Sci. J of KFU.9:51-69.