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O.E.Mohamed, M. M.Hady, and M.M.Zaki, ") Role of dietary zinc on immune response of broiler chickens", Veterinary Medical Journal, Giza, vol. 38, issue 2, pp. 283-295, 1990.
O.El-Matarawy, S.H.Omar, S.M.El-Naggar, M.K.Sobhi, and N.A.El-Dib, "Effect of dosage and route of inoculation on pasrasitaemia in white rats & guinea pigs to Plasmodium berghei infection", J. Egypt. Soc. Parasitol., , vol. 17, pp. 93-96, 1987.
O.Elkhashab, M. Soliman, M. A. Zeid, and W. gad, "bacteremia in chronic hemodialysis patients", Medical Journal of Cairo University, vol. 51, pp. 201-208, 1983.
O.F, A. T., M. R. Amin, M. M. Ibrahim, A. M. Wahab, A. E. E. N. Rahman, R. H. Hassanien, M. H. Hatem, and A. E. Ghaly, "Recycling Waste Plastic Bags as a Replacement for Cement in Production of Building Bricks and Concrete Blocks", Journal of Waste Resources and Recycling, vol. 1, issue 2, pp. 202, 2020. recycling-waste-.pdf
O.G., S., C. R., V. B., R. P.G., G. - G. R.M., and A. - Á. M., "Body composition and productive parameters of primiparous does supplementing with propylene glycol for long time", XXXVI Symposium de Cunicultura, Peñíscola,SPAIN, 12-13 mayo-2011.
O.G., S., C. R., G. - G. R.M., and L. R. P. L. P. G. Arias-Álvarez M., García-Rebollar P., "Effects of different oestrus synchronization methods in primiparous lactating rabbit does", 16. 4th Egyptian Conference of Rabbit Science, 29-30 October , cairo, Egypt., 2011. 4th_egyptian_conference.pdf
O.G., S., N. Y.H., N. Z.A, and E. R. M., "Single-nucleotide polymorphisms of IL-10 and IL-28B as predictors of the response of IFN therapy in HCV genotype 4-infected children.", Journal of Pediatric Gastroenterology & Nutrition, vol. 57, issue 2, pp. 155-160, 2013.
O.G., S., and S. H., "Early Prediction of Preeclampsia in High-Risk Women", J Womens Health, 2011. Abstract

Background: The purpose of this study was to determine the role of the combined use of uterine artery Doppler velocimetry (UADV) and maternal serum placental growth factor (PlGF), vascular endothelial growth factor receptor-1 soluble fms-like tyrosine kinase-1 also called soluble (sVEGFR-1), and nitric oxide (NO) products concentrations for the prediction of preeclampsia in high-risk women and to compare these parameters between patients with mild and severe preeclampsia.

O.H., M., and S. B. Iman, "Histopathological study on the effect of Renicola heroni on the kidneys of giant heron Ardea goliath", Helminthologia, vol. 38, issue 2, pp. 81-83, 2001.
O.M, S., E. S. AM, and A. S.K., "GC/MS Analysis and Potential Cytotoxic Activity of Haplophyllum tuberculatum Essential Oils Against Lung and Liver Cancer Cells", Pharmacognosy Journal, vol. 8, issue 1, pp. 66-69, 2016.
O.M., E., K. S.S.A, G. T.M, A. E. - A. N.M, and A. - E. A.M, "- Biochemical assessment of a novel fermentation products as antimicrobial antioxidant and anticancer ((In vitro study).", Bell. Fac. Agric., Cairo Univ., (DT12 Conference, Special issue)., vol. 66, issue 5, pp. 42-53, 2015.
O.M. EL-Husseiny, M. O. Abd-Elsamee, M. I. Hassane, and I. I. Omara., "Response of egg production and egg shell quality to dietary vegetable oils.", International Journal of Poultry Science , vol. 7 , issue 10, pp. 1022-1032., 2008.
O.M. EL-Husseiny, M. O. Abd-Elsamee, I. I. Omara, and A. M. Fouad., "Effect of dietary zinc and niacin on laying hens performance and egg quality.", International Journal of Poultry Science , vol. 7 , issue 8, pp. 757-764., 2008.
O.N, E. G., M. AI, S. AM, and M. MA, "Antioxidant and hepatoprotective effects of silymarin phytosomes compared to milk thistle extract in CCl4 induced hepatotoxicity in rats", Journal of Microencapsulation, vol. 31, issue 1, pp. 23-30 , 2014. silymarin_phytosomes.pdf
O.Rasekh, E., G. M. Elsayed, Y. madney, and M. ElGammal, "Prognostic Significance of bcr-1 and bcr-3 Isoforms of PML-RARA and FLT3-ITD in Patients With Acute Promyelocytic Leukemia", Clinical Lymphoma Myeloma and Leukemia, vol. 20, issue 3, pp. 156-167, 2020.
O.S., H., A. H. Hanafy Ahmed, G. A.R., and E. - H. A.M., "Some Active Ingredients, Total Protein and Amino Acids in Plants Produced from Irradiated Ambrosia maritime Seeds Growing under Different Soil Salinity Levels.", American Journal of Plant Physiology , vol. 7, issue 2, pp. 70-83., 2012.
OA, A., B. DA, E. L. - H. MS, E. M. ZM, S. RM, and E. L. - M. MS, "Treatment of hypertrophic scars and keloids by fractional carbon dioxide laser: a clinical, histological, and immunohistochemical study.", Lasers Med Sci., vol. 24, 2015.
OA, B., N. MH, K. AM, and N. AA, "360° laser retinopexy in preventing retinal re-detachment after 23-gauge vitrectomy for primary repair of retinal detachment.", Egyptian Retina Journal, vol. 3, issue 1, pp. 1-9, 2015.
OA Momtaz, A. H. Fahmy, A. A. Diab, and A. H. Hanafy Ahmed, "Comparative analysis of amino acid between transgenic and non transgenic Egyptian Cotton (Gossypium barbadense) lines under different salt stress conditions.", American Eurasion J. Agric. and Environ. Sci., , vol. 2, issue 1, pp. 6-15., 2007.
OA Momtaz, M. M. Hashem, R. E. A. Moghaieb, and Mona H Hussein, "Genetic polymorphism among some Egyptian rice genotypes as revealed by RAPD, SSR and AFLP analyses.", Arab J. Biotechnology, vol. 13, issue 12, pp. 173-184, 2010. Abstract
OA Momtaz, M. H. Hashem, MHHussein, and R. E. A. Moghaieb, "Genetic Polymorphism among some Egyptian rice genotypes as revealed by RAPD, SSR and AFLP analyses", Arab J Biotech, vol. 13, issue 2, pp. 173-184, 2010.
and OA. Othman1, 2, B. 2 W. M. 3 L. 2, "Optimizing the Process Parameters and Investigating the Influence of Shot Peening and Roller Burnishing On Surface Layer Properties and Fatigue Performance of Al 6061 T4", Sohaj journal of Science, vol. 1, issue 1: Natural Sciences Publishing Cor., pp. 65-72, 2016. Abstract
Oad, V. K., A. Szymkiewicz, N. A. Khan, S. Ashraf, R. Nawaz, A. Elnashar, S. Saad, and A. H. Qureshi, "Time series analysis and impact assessment of the temperature changes on the vegetation and the water availability: A case study of Bakun-Murum Catchment Region in Malaysia", Remote Sensing Applications: Society and Environment, vol. 29, pp. 100915, 2023. AbstractWebsite

The Bakun-Murum (BM) catchment region of the Rajang River Basin (RRB), Sarawak, Malaysia, has been under severe threat for the last few years due to urbanization, global warming, and climate change. The present study aimed to evaluate the time series analysis and impact assessment of the temperature changes on the vegetation/agricultural lands and the water availability within the BM region. For this purpose, the Landsat data for the past thirty years (1990–2020) were used. Remote sensing techniques for estimating the surface temperatures and variation within the vegetation and water bodies were utilized, and validation was done using on-ground weather stations. Google Earth Engine (GEE) and other RS & GIS tools were used for analyzing the time series trends of land surface temperature (LST), normalized difference vegetation index (NDVI), and normalized difference water index (NDWI). The results exposed an overall rise of 1.06 °C in the annual mean temperatures over the last thirty years. A maximum annual mean NDVI of 0.48 was recorded for 2018 and 2019. The lowest annual mean NDVI (0.27) was observed in 2005. The annual mean NDWI increased to 0.48 in 2018 and 2019, respectively. The statistical correlation results revealed the coefficient of determination (R2) of 0.09 and 0.13 for the annual mean LST and annual mean NDVI and the annual mean LST and annual mean NDWI, respectively. Moreover, the Mann-Kendall trend test for the annual mean temperature series indicates a slightly increasing trend with Sen's slope of 0.03 °C/year. It is found that there is a positive trend in the annual mean rainfall patterns, as Sen's slope indicates a yearly increase of 50.58 mm/year. This study found significant changes in the LST, NDVI, and NDWI of the BM catchment region during the last thirty years, demanding the concerned authorities' instant attention to alleviate the adverse effects of such changes to protect the ecosystem.