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| 1 | Age distribution,polyps and rectal cancer in the Egyptian population-based cancer registry显示文摘AIM:To describe the clinical and epidemiologic profiles of the disease and to compare the findings with those generated from the previous hospital-based studies.METHODS:The Gharbiah cancer registry is the only population-based cancer registry in Egypt since 1998.We analyzed the data of all colorectal cancer patients included in the registry for the period of 1999-2007.All medical records of the 1364 patients diagnosed in Gharbiah during the study period were retrieved and the following information abstracted:age,residence,diagnosis date,grade,stage,topology,clinical characteristics,and histology variables.Egyptian census data for 1996 and 2006 were used to provide the general population's statistics on age,sex,residence and other related demographic factors.In addition to age-and sex-specific incidence rate analyses,we analyze the data to explore the incidence distribution by rural-urban differences among the 8 districts of the province.We also compared the incidence rates of Gharbiah to the rates of the Surveillance Epidemiology and End Results(SEER) data of the United States.RESULTS:Over the 9 year-period,1364 colorectal cancer cases were included.The disease incidence under age 40 years was relatively high(1.3/10 5) while the incidence in the age groups 40 and over was very low(12.0/10 5,19.4/10 5 and 21.2/10 5 in the age groups 40-59 years,60-69 years and > 70 years,respectively).The vast majority of tumors(97.2%) had no polyps and 37.2% of the patients presented with primary lesions in the rectum.Colorectal cancer was more common in patients from urban(55%) than rural(45%) areas.Regional differences in colon and rectal cancer incidence in the 8 districts of the study province may reflect different etiologic patterns in this population.The registry data of Egypt shows a slightly higher incidence of colorectal cancer than the United States in subjects under age 40 years.The results also shows significantly lower incidence of colorectal cancer in subjects over age 40 years compared to the same age group in the United States SEER.CONCLUSION:Low rate of polyps,low incidence in older subjects,and high rate of rectal cancer in Egypt.Future studies should explore clinical and molecular disease patterns. | Darlene Veruttipong Amr S Soliman Samuel F Gilbert Taylor S Blachley Ahmed Hablas Mohamed Ramadan Laura S Rozek Ibrahim A Seifeldin | 2012 | World Journal of Gastroenterology2012，18，30： | 12 |
| 2 | Solar thermochemical reactions Ⅱ:Synthesis of 2-aminothiophenes via Gewald reaction induced by solar thermal energy显示文摘Green conditions have been developed for the synthesis of substituted 2-aminothiophenes employing multicomponent reactions of a ketone with active methylene nitrile and elemental sulphur induced by free solar thermal energy. | Ramadan Ahmed Mekheimer Mohamed Abdallah Ameen Kamal Usef Sadek | 2008 | Chinese Chemical Letters2008，19，7： | 2 |
| 3 | Expression levels of pro-inflammatory interleukin-8 and certain antimicrobial peptides in concurrent with bacterial conjunctivitis显示文摘AIM:To detect the quantitative expression levels of the pro-inflammatory interleukin-8(IL8),antimicrobial peptides human beta defense-2(HBD2),and human beta defense-3(HBD3)genes in bacterial conjunctivitis.METHODS:The human conjunctival epithelial cells were obtained using the impression cytology technique from healthy controls and patients.The genes expression levels were determined utilizing a reverse transcription quantitative polymerase chain reaction(RT-q PCR).The contribution of causative agent type,the number of isolates and severity of clinical features,in the increase of genes expression was also determined.RESULTS:The RT-q PCR showed that IL8,HBD2,and HBD3 expression increased in bacterial conjunctivitis as compared to healthy control(P<0.001).In gram-negative bacterial conjunctivitis,HBD2 was highly up-regulated(P<0.001)compared to other types of bacterial conjunctivitis.In mixed bacterial conjunctivitis,a direct correlation between HBD2 up-regulation and HBD3 up-regulation was observed(P<0.05).The severity of clinical features was related to the up-regulation of IL8 and HBD2(P<0.05).CONCLUSION:IL8,HBD2,and HBD3 are immuneeffectors in infectious conjunctivitis.HBD2 is active during different bacterial conjunctivitis but is more released with gram-negative bacteria compared to gram-positive bacteria.HBD3 is an obvious defender in different bacterial conjunctivitis. | Alaa El-Dien Shawky Hosny Zeinab El-Demerdash El-Bazza Mohammed Abdelhalim Ramadan Maha Ahmed Shafik Mahmoud Ahmed Shafeek Rania Abdelmonem Khattab | 2021 | International Journal of Ophthalmology(English edition)2021，14，5： | 2 |
| 4 | Friction and wear of sand-contaminated lubricated sliding显示文摘This paper reports a test investigation of friction and wear responses from sand contaminated lubricated sliding. The influence of sand contaminants on wear and friction is characterized. Analyses are completed utilizing segments of piston ring sliding against the cylinder liner. Paraffin oil, with and without sand contaminants, is utilized. The effects of the concentration and particle size of sand are examined. Based on the observations in the present work, we found that friction and wear increase with sand concentration in the lube. Solid proposals ought to be considered, in order to enlighten the general population on the importance of changing a car engine's oil filter regularly. | Mohamed Ahmed RAMADAN | 2018 | Friction2018，6，4： | 2 |
| 5 | Rheology characterization of polymer drilling foams using a novel apparatus显示文摘 | Zhu Chen Ramadan M Ahmed Stefan Z Miska | | 0，，： | 1 |
| 6 | Effect of gamma irradiation on the dielectric properties of La doped CuZn ferrite显示文摘 | Ahmed M A Ramadan A A | 2007 | AIP Conf Proc2007，888，： | 1 |
| 7 | Psychology in the Arab world:past,present and future:a historical introduction显示文摘 | Ramadan A Ahmed | 2002 | International Journal of Group Tensions2002，30，3： | 1 |
| 8 | Gastric carcinoma at Tanta Cancer Center: A comparative retrospective clinico-pathological study of the elderly versus the non-elderly显示文摘 | Ahmed A. Zeeneldin Hanan Ramadan Mosaad M. El Gammal Magdy M. Saber Dina Elgamal Mohamed A. Sherisher | 2014 | Journal of the Egyptian National Cancer Institute2014，，： | 1 |
| 9 | Bioactive compounds and health-promoting properties of royal jelly: A review显示文摘 | Mohamed Fawzy Ramadan Ahmed Al-Ghamdi | 2011 | Journal of Functional Foods2011，，1： | 1 |
| 10 | Chemical characteristics and antioxidant activity of exopolysaccharide fractions from Microbacterium terregens显示文摘 | Asker M M S Ahmed Y M Ramadan M F | 2009 | Carbohydr Polym2009，77，： | 1 |
| 11 | Chemical char- acteristics and antioxidant activity of exopolysaccharide frac- tions from Microbacterium terregen 显示文摘 | Asker M M S Ahmed Y M Ramadan M F | 2009 | Carbohydrate Poly mers2009，77，3： | 1 |
| 12 | Potential of nanoemulsions for intravenous delivery of rifampicin显示文摘 | Ahmed M Ramadan W Rambhu D | | 0，，11： | 1 |
| 13 | Coriander ( Coriandrum sativum L.) seed oil improves plasma lipid profile in rats fed a diet containing cholesterol显示文摘 | Mohamed Fawzy Ramadan Mohamed Mostafa Afify Amer Ahmed El-Said Awad | 2008 | European Food Research and Technology2008，，4： | 1 |
| 14 | Combined estrogen and ghrelin administration restores number of blood vessels and collagen type I/III ratio in the urethral and anal canal submucosa of old ovariectomized rats显示文摘 | Diaa E. E. Rizk Hazem A. Hassan Ahmed H. Al-Marzouqi Gaber A. Ramadan Soha S. Al-Kedrah Sayel A. Daoud Mohamed A. Fahim | 2008 | International Urogynecology Journal2008，，4： | 1 |
| 15 | Potential of nanoemul- sions for intravenous delivery of rifampicin显示文摘 | Ahmed M Ramadan W Rambhu D | 2008 | Pharmazie2008，63，： | 1 |
| 16 | Comparative study between biofeedback retraining and botulinum neurotoxin in the treatment of anismus patients显示文摘 | Mohamed Farid Hisham Abd Monem Waleed Omar Ayman Nakeeb Amir Fikry Tamer Youssef Mohamed Yousef Hosam Ghazy Elyamani Fouda Teto Metwally Wael Khafagy Sabry Ahmed Salih Awady Mosaad Morshed Ramadan Lithy | 2009 | International Journal of Colorectal Disease2009，，： | 1 |
| 17 | Permutation-substitution image encryption scheme based on a modified chaotic map in transform domain显示文摘A new chaotic image encryption scheme based on permutation and substitution in the Fourier domain is presented.Fractional Fourier Transform(FRFT)is used before the encryption scheme to get a large degree of randomization.The permutation is achieved by Baker map and the substitution by a key-related-to-plain-image algorithm based on the modified Logistic map.Modification of the Logistic map is developed to increase the space of the encryption key,and hence increase the security.The key of the encryption algorithm dependents on the plain image,and thus,the cipher image is sensitive to both the initial key and the plain image to resist known-plaintext and chosen plaintext attacks.The key space is large and hence the algorithm can effectively resist brute-force attacks.The proposed scheme is examined using different performance evaluation metrics and the results prove that the proposed scheme is highly secure,and it can effectively resist different attacks. | Ramadan Noha Ahmed HossamEldin H El-khamy Said E Abd El-Samie Fathi E | 2017 | Journal of Central South University2017，24，9： | 1 |
| 18 | Spectral, electrical conductivity and biological activity properties of some new azopyrimidine derivatives and their complexes显示文摘 | Mamdouh S. Masoud Ekram A. Khalil Ahmed M. Ramadan Yousry M. Gohar Amr Sweyllam | 2006 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy2006，，3： | 1 |
| 19 | Chemical characteristics and antioxidant activity of exopolysaccha- ride fractions from Microbacterium terregens显示文摘 | Asker M M S Ahmed Y M Ramadan M F | 2009 | Carbo- hydrate Polymers2009，77，3： | 1 |
| 20 | Role of endoscopic ultrasound and cyst fluid tumor markers in diagnosis of pancreatic cystic lesions显示文摘BACKGROUND Pancreatic cystic lesions(PCLs) are common in clinical practice. The accurate classification and diagnosis of these lesions are crucial to avoid unnecessary treatment of benign lesions and missed opportunities for early treatment of potentially malignant lesions.AIM To evaluate the role of cyst fluid analysis of different tumor markers such as cancer antigens [e.g., cancer antigen(CA)19-9, CA72-4], carcinoembryonic antigen(CEA), serine protease inhibitor Kazal-type 1(SPINK1), interleukin 1 beta(IL1-β), vascular endothelial growth factor A(VEGF-A), and prostaglandin E2(PGE2)], amylase, and mucin stain in diagnosing pancreatic cysts and differentiating malignant from benign lesions.METHODS This study included 76 patients diagnosed with PCLs using different imaging modalities. All patients underwent endoscopic ultrasound(EUS) and EUS-fine needle aspiration(EUS-FNA) for characterization and sampling of different PCLs.RESULTS The mean age of studied patients was 47.4 ± 11.4 years, with a slight female predominance(59.2%). Mucin stain showed high statistical significance in predicting malignancy with a sensitivity of 87.1% and specificity of 95.56%. It also showed a positive predictive value and negative predictive value of 93.1% and 91.49%, respectively(P < 0.001). We found that positive mucin stain, cyst fluid glucose, SPINK1, amylase, and CEA levels had high statistical significance(P < 0.0001). In contrast, IL-1β, CA 72-4, VEGF-A, VEGFR2, and PGE2 did not show any statistical significance. Univariate regression analysis for prediction of malignancy in PCLs showed a statistically significant positive correlation with mural nodules, lymph nodes, cyst diameter, mucin stain, and cyst fluid CEA. Meanwhile, logistic multivariable regression analysis proved that mural nodules, mucin stain, and SPINK1 were independent predictors of malignancy in cystic pancreatic lesions.CONCLUSION EUS examination of cyst morphology with cytopathological analysis and cyst fluid analysis could improve the differentiation between malignant and benign pancreatic cysts. Also, CEA, glucose, and SPINK1 could be used as promising markers to predict malignant pancreatic cysts. | Hussein Hassan Okasha Abeer Abdellatef Shaimaa Elkholy Mohamad-Sherif Mogawer Ayman Yosry Magdy Elserafy Eman Medhat Hanaa Khalaf Magdy Fouad Tamer Elbaz Ahmed Ramadan Mervat E Behiry Kerolis Y William Ghada Habib Mona Kaddah Haitham Abdel-Hamid Amr Abou-Elmagd Ahmed Galal Wael A Abbas Ahmed Youssef Altonbary Mahmoud El-Ansary Aml E Abdou Hani Haggag Tarek Ali Abdellah Mohamed A Elfeki Heba Ahmed Faheem Hani M Khattab Mervat El-Ansary Safia Beshir Mohamed El-Nady | 2022 | World Journal of Gastrointestinal Endoscopy2022，14，6： | 1 |
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