عودة

 

الأستاذ الدكتور/ ضرار رفعت إبراهيم محمد
أستاذ بقسم التوليد والتناسل و التلقيح الاصطناعى، كلية الطب البيطرى، جامعة أسيوط

بيانات ال MIS

دخول الإعضاء

تواصل مع العضو نسخة للطباعة
الموبايل 01001285788
تليفون المنزل 088/2288635
البريد الالكترونى derar.mohamed@aun.edu.eg
google scholar link https://scholar.google.com.eg/citations?user=GOh-I68AAAAJ&hl=en

  • دكتوراه، كليه الطب البيطري، جامعه اسيوط، 2002
  • ماجستير، كليه الطب البيطري، جامعه اسيوط، 1997
  • بكالوريوس، كليه الطب البيطري، جامعه اسيوط، 1993
الدرجات العلمية :
  • أستاذ بقسم التوليد والتناسل و التلقيح الاصطناعى، كلية الطب البيطرى، جامعة أسيوط، 2012
  • أستاذ مساعد بقسم التوليد والتناسل و التلقيح الاصطناعى، كلية الطب البيطرى، جامعة اسيوط، 2007
  • مدرس بقسم التوليد والتناسل و التلقيح الاصطناعى، كلية الطب البيطرى، جامعة اسيوط، 2002
  • مدرس مساعد بقسم التوليد والتناسل و التلقيح الاصطناعى، كلية الطب البيطرى، جامعة اسيوط، 1997
  • معيد بقسم التوليد والتناسل و التلقيح الاصطناعى، كلية الطب البيطرى، جامعة اسيوط، 1994

المجالات البحثية:
Theriogenology

الابحاث :

1-A Abultdinova, I Dzakupov, J Roth, A Wehrend, M Sickinger, Vaginal and cervical tumors in dromedary camels, Reproduction in Domestic Animals, Vol.52, PP.5-59, 2017
2-Ahmed Ali, Derar Derar, Fahd Al-Sobyil, Moustafa M Zeitoun, Khaled MA Hassanein, Abdella Al-Howas, Phimosis in male dromedary camels: clinical findings and changes in the hemogram, nitric oxide metabolites and testosterone concentrations, Theriogenology, Elsevier, http://www.sciencedirect.com/science/article/pii/S0093691X16000121, 2016
3-DR Derar1,2, G Badry3, SM Abdel-Raheem4, W Senosy2, Ovarian, endocrinological and metabolic changes in ewes supplemented with short term-metabolic energy during the estrous cycle, Reprod Dom Anim , http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1439-0531, 50 (Suppl. 1), , 1–77 (2015, doi: 10.1111/rda.12498, 2015
4-DR Derar, G Badry, SM Abdel-Raheem, W Senosy , Ovarian, endocrinological and metabolic changes in ewes supplemented with short term-metabolic energy during the estrous cycle , REPRODUCTION IN DOMESTIC ANIMALS , 50, supp (1), , 65-66, doi: 10.1111/rda.12498, 2015
5-Mahmoud R. Abd Ellah, Maha I. Hamed, Derar R. Ibrahim Hassan . Rateb, Serum biochemical and haematological reference intervals for water buffalo (Bubalus bubalis) heifers, Journal of the South African Veterinary Association, 85(1), 1-7, 2014
6-•M.S. Rawy∗, R.I. Derar, T.M. El-Sherry, G.A. Megahed, Plasma steroid hormone concentrations and blood flow of theovarian structures of the female dromedary (Camelusdromedarius) during growth, dominance, spontaneousovulation, luteinization and regression of the follicular wave., Animal Reproduction Science, 148 , 137–144, 2014
7-T.M. EL-Sherrya,∗, R. Derara, R. Bakryb, Changes in blood flow in ovine follicles and serum concentration of estradiol 17 beta (E2) and nitric oxide (NO) around the time of ovulation in Ossimi ewes, Animal Reproduction Science, © 2013 Elsevier, 2013
8-Reference Values for Hematological and Serum Biochemical constituents for Buffalo's Heifers. , Mahmoud Rushdi Abd Ellah, Maha I. Hamed, Derar R. Ibrahim, Hassan Z. Rateb , XX International Congress of Mediterranean Federation of Health and Production of Ruminants. 19-22 February 2013, Assiut University, Egypt. , 85-94., 2013
9-W. Senosy1, Sh. M. Abdel-Raheem2, M. Abd-Allah, S. Fahmy3, E.H. Hassan3, R.I. Derar1 , Effect of transient high-energy diets just after ovulation on ovarian performance and metabolic status in cyclic ewes , Small Ruminant Research , www.elsevier.com/locate/smallrumres, 109 , 152– 155, http://ac.els-cdn.com/S0921448812002660/1-s2.0-S0921448812002660-main.pdf?_tid=6376d9a8-d3c6-11e4-9f0a-00000aab0f6b&acdnat=1427381155_029f852d55acf46527ea3f88515ab3ec, 2013
10-Hassan A. Hussein, Mahmoud R. Abd Ellah, Derar R. I. Derar, Antioxidant concentrations in serum, follicular fluid, and corpus luteum of cyclic buffalo cows., Comparative Clinical Pathology , DOI 10.1007/s00580-012-1485-7., 2012
11-R. Derar1,3, H.A. Hussein1, S. Fahmy2, T.M. El-Sherry1, G. Megahed1, The effect of parity on the efficacy of an ovulation synchronization (Ovsynch) protocol in buffalo (Bubalus bubalis), Anim. Reprod, 2012
12-Hassan A. Hussein & Mahmoud R. Abd Ellah & Derar R. I. Derar, Antioxidant concentrations in serum, follicular fluid, and corpus luteum of cyclic buffalo cows, ORIGINAL ARTICLE, 2012
13-A.M. SALEH; E. A. ABDELHAFEZ and D.R.I. DERAR , Immunohistochemical study of estrogen and progesterone receptors in different size classes of ovarian follicles in dromedary camels. , Assiut Vet. Med. J. , 58, 36 - 56, 2012
14-Badry Mahmoud, G., Abdel-Raheem, Sh. M., Senosy, W., and Dera, R.I. (2012), Impact of a short period-energy supplementation on the ovarian follicular dynamics, blood metabolites and sex hormones in ewes, Journal of Agricultural Economics and Development , at http://academeresearchjournals.org/journal/jaed, Vol. 1(6), , pp. 145-152, , http://academeresearchjournals.org/journal/jaed, 2012
15-•M.S. Rawy, D.R. Derar, T.M. El-Sherry and G.A. Megahed, Characterization of Follicular and Luteal Blood Flow in Female Dromedary Camel Induced to Ovulate Using GnRH Analogue , Journal of Camel Practice and Research, Vol 19 No 2, p 1-7, 2012
16-DERAR REFAAT DERAR, MOHAMMAD HAYDER, AHMED ALI1, HATEM HAMDOUN, POSTPARTUM UTERINE INVOLUTION AND LUTEAL ACTIVITY IN FARAFRA EWES LAMBING IN AUTUMN, Assiut Vet. Med. J. , Vol. 58 No. 132, 2012
17-T.M. EL-SHERRY, D.R. DERAR, M. HAYDER H. HAMDON and E. SAIFELNASR, EFFECT OF PROGESTERONE AND PROSTAGLANDIN ANALOGUE-BASED SYNCHRONIZATION PROGRAMS ON THE FOLLICULAR DYNAMICS AND CONCEPTION RATE AT TWO DIFFERENT BREEDING SEASONS IN SUBTROPICAL EWES, Assiut Vet. Med. J., Vol. 58 No. 135, 2012
18-A. Ali, R. Derar, H. A. Hussein, M. R. Abd Ellah , A. Kh. Abdel-Razek, Clinical, hematological, and biochemical findings of uterine torsion in buffaloes (Bubalus bubalis) , Animal Reproduction Science, 10.1016/j.anireprosci.2011.05.005, 2011
19-DR Derar, K Taya, G Watanabe and Y-I Miyake, Characterization of Immunoreactive IGF-I Pattern During the Peri-ovulatory Period of the Oestrous Cycle of Thoroughbred Mares and Its Relation to Other Hormones, Reprod Dom Anim, doi: 10.1111/j.1439-0531.2011.01819.x, 2011
20-Derar Refaat Derar*, Hasan Ali Hussein, Ahmad Ali Hussein, Reference values for the genitalia of male dromedary before and after puberty using caliper and ultrasonography in subtropics, Theriogenology, 2011
21-Abd Ellah, M. R, Hussein H. A. and Derar, D. R., Ovarian Follicular Fluid Constituents in Relation to Stage of Estrus Cycle and Size of the Follicle in Buffalo Cows. , The Veterinary World , Vol.3 No.6: , 263-267, 2010
22-Hussein H.A., Derar, R., Fahmy S., EL-Sherry T., Megahed, G., 3-Ovarian response and progesterone profile during Ovsynch Protocol in Heifers and Pluriparous Buffalo-cows (Bubalus bubalis). , 10 Scientific congress of Egyptian Society for cattle diseases , 2009
23-G.A. MEGAHED; D.R. DERAR; H.A. HUSSEIN; and A.L.E. MOHMOUD, GENITAL MYCOTIC INFECTION OF THE REPEAT BREEDER MARES AND FIELD TRIALS FOR ITS TREATMENT , Assiut Vet. Med. J., Vol. 55, No. 122, 2009
24-H. Hussein, Derar and A. Ali, R. , Caliper and Ultrasonographic Measurements of the Male Camel Genitalia (Camelus dromedarius) at Different Ages and A mathematical Formula for Determination of Testicular Volume in VIVO. , 9th Scientific Congress of the Egyptian Society for Cattle Disease 2-4 Dec. 2007, Luxor, Egypt pp: 347-358 , 2007
25-A. Ali1, AKh. Abdel-Razek, R. Derar, H.A. Abdel-Rheem, SH Shehata, Forms of Reproductive Disorders in Cattle and Buffaloes in Middle Egypt. , Reprod. Dom. Anim. doi, 2007
26-Derar R, Haramaki S, Hoque S, Hashizume T, Osawa T, Taya K, Watanabe G, Miyake Y. , Immunoreactive Insulin-like growth factor in plasma during pre- and post-partum periods of thoroughbred mares from which the newborn were removed: its pattern, physiological function and relation to other hormones. , J Equine Sci. , 17(3):75-79., 2006
27-D. R. I Drear; H. A. Hussein and A. M. Saleh , Morhological and immunohistochemical varations in the camel (Camelus Dromedarius) testis in relation to some endocrinological aspects during different seasonsof year. , Assiut Vet. Med. J. , Faculty of Vet. Med., 51, 1 – 17 , 2005
28-Moatz,.A. Abdel-Rahman ; Moustafa, M. Ahmed. and Derar, I. D. (2003), Applied study on physical restraint during ultrasonography as stress on health status and some blood parameters of one humped camels( Camelus dromedarius )in Upper Egypt , Assiut Univ. Bull. Environ. Res.,Vol.6 No.1, March, P. 73-78., Vol.6 No.1, March, P. 73-78., P. 73-78, 2003
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