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Indentation Creep Behavior and Microstructure of Cu-Ge Ferrites

Materials Sciences and Applications 2011年第8期2卷 1076-1082页

作者： hesham Mohaned Zaki Ali Mohamed abdel-Daiem Yahia Ibrahim Swilem Farid El-Tantawy Fahad Masoud Al-Marzouki Ahmed Abdallah Al-Ghamdi Saleh Al-Heniti Farag Said Al-Hazmi Talal Sadaka Al-harbi 不详

Cu-Ge ferrite was prepared using the standard ceramic method. The creep rate of polycrystalline Cu1+xGexFe2-2xO4 ferrite has been measured as a function of time at room temperature. It is found that the indentation length increases with the increase of both time and applied load. A regime of individual creep curves is observed for the first and second stages. It is not possible to record the third stage of the curve as usually happened in an ordinary creep test, because fracture of the samples does not occur. The slope is found to increase with increasing germanium and copper content in the steady state region. The high value of n (stress exponent factor) indicates that the dislocation creep is the dominate mechanism. The porosity arrangements developed within the specimens were examined using optical microscope. The results are discussed with regard to models describing the role of the steady state creep rate of metals. The morphology of the samples shows that the porosity is increased by increasing both copper and germanium ions.

关键词： Ferrites Indentation Creep Microstructure

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Human umbilical cord mesenchymal stem cells as treatment of adjuvant rheumatoid arthritis in a rat model

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World Journal of Stem Cells 2012年第10期4卷 101-109页

作者： Sahar Greish Noha Abogresha Zeinab abdel-hady Eman Zakaria Mona Ghaly Mohamed Hefny Department of Physiology Faculty of MedicineSuez Canal University4111 IsmailiaEgypt Department of Histology Faculty of MedicineSuez Canal University4111 IsmailiaEgypt Department of Pharmacology Faculty of MedicineSuez Canal University4111 IsmailiaEgypt Department of Rheumatology and Rehabilitation Faculty of MedicineSuez Canal University4111 IsmailiaEgypt

AIM:To investigate the effect of human umbilical cord stem cells,both mesenchymal and hematopoietic(CD34+),in the treatment of ***:Mesenchymal stem cells(MSCs) and hematopoietic(CD34+) stem cells(HSC) were isolated from human umbilical cord blood obtained from the umbilical cord of healthy pregnant donors undergoing fullterm normal vaginal ***,HSC,methotrexate(MTX) and sterile saline were injected intra-articularly into the rat hindpaw with complete freunds adjuvant(CFA) induced arthritis after the onset of disease(day 34),when arthritis had become well established(arthritis score ≥ 2).Arthritic indices were evaluated and the levels of interleukin(IL)-1,tumor necrosis factor(TNF)-α and interferon(IFN)-γ and anti-inflammatory cytokine IL-10 in serum were determined using enzyme-linked immunosorbent *** of all groups were sacrificed 34 d after beginning treatment,except positive control(PC) which was sacrificed at 10,21 and 34 d for microscopic observation of disease *** used hematoxylin,eosin and Masson's trichrome stains for histopathological examination of cartilage and ***:The mean arthritis scores were similar in all groups at 12 and 34 d post immunization,with no statistical significant *** the injection of stem cells(hematopoietic and mesenchymal),the overall arthritis signs were significantly improved around 21 d after receiving the injection and totally disappeared at day 34 post treatment in MSC *** hindpaw diameter(mm) in the MSC rats was about half that of the PC and MTX groups(P = 0.007 and P = 0.021,respectively) and 0.6 mm less than the HSC group(P = 0.047),as indicated by paw *** with these findings,serum levels of TNF-α,IFN-γ and IL-1 decreased significantly in HSC and MSC groups compared to PC and MTX groups(P < 0.05),while the expression of IL-10 was *** examination with H and E stain revealed that the MTX treated group showed signific

关键词： Complete freunds adjuvant-induced arthritis Human umbilical mesenchymal stem cell Hematopoietic stem cell CD34+

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Ovarian Cancer: Clinical, Therapeutic and Prognostic Aspects at the University Hospital Center of Conakry in Guinea

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Open Journal of Obstetrics and Gynecology 2023年第12期13卷 1985-1993页

作者： Abdourahamane Diallo Mamadou hady Diallo Fatoumata Bamba Diallo Ibrahima Koussy Bah Boubacar Siddy Diallo Ibrahima Sory Balde Telly Sy Namory Keita Gynecology-Obstetrics Department Ignace Deen National Hospital Conakry Guinea Faculty of Health Sciences and Techniques Gamal Abdel Nasser University of Conakry Conakry Guinea Gynecology-Obstetrics Department Donka National Hospital Conakry Guinea

Background: Ovarian cancer is the seventh most common cancer in women in the world and is the leading cause of death among gynecological cancers. Objective: The objective of this study was to describe the clinical, therapeutic and prognostic aspects of ovarian cancer in the both Gynecology-Obstetrics departments Donka and Ignace Deen of the Conakry University Hospital. Methods: This was a retrospective, descriptive study lasting 12 years from January 1, 2011 to December 31, 2022, covering the files of patients treated for ovarian cancer in the both Gynecology-Obstetrics departments Donka and Ignace Deen. The study focused on the epidemiological, clinical, histological and therapeutic aspects of the disease. Results: In total, 135 files of patients with ovarian cancer were collected out of the 3821 files of gynecological pathologies recorded in the two departments during the study period, either a frequency of 3.5%. Among gynecological and breast cancers, ovarian cancer represented 9.1%. The average age of the patients was 46.3± 17.8 years and the average parity was 4 ± 3. The revealing clinical signs were dominated by pelvic pain (92.6%) and increased abdominal volume (53.3%). The diagnosis of the disease was made mainly at stages III and IV (71.9%). The most common histological type was serous papillary adenocarcinoma (57.0%). Exclusive surgical treatment was performed in 8.1% of patients, surgery combined with chemotherapy in 63.0% of patients and exclusive chemotherapy in 11.1% of patients. After an average follow-up of 42 months, 29 patients out of the 96 operated on were alive (30.2%), 51 had died (53.1%) and 16 patients were lost to follow-up (16.7%). Conclusion: Ovarian cancer is the third most common cancer in both departments. Diagnosis is often late and the prognosis is poor.

关键词： Cancer Ovary Ignace Deen Donka

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妊娠期并发心脏病母体和围生期母儿结局

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世界核心医学期刊文摘（妇产科学分册） 2005年第12期1卷 55-55页

作者： abdel-hady E.-S. El-Shamy M. El-Rifai A.-A. 吕乐春 Departments of Obstetrics and Gynecology Mansoura University Teaching Hospital Mansoura Egypt

Objective: The aim of this study was to assess the maternal and perinatal outcome of pregnancies complicated by cardiac disease in a tertiary care center in Egypt. Methods: During a 1- year period, a total of 86 pregnant women with cardiac disease were admitted. Maternal and perinatal morbidity and mortality were calculated and compared with a control group. Results: Seventy-seven (89.5% ) patients were due to rheumatic affection, and 60 patients were classified as NYHA classes I- II. There was one case of maternal mortality (1.16% ), and 10 other cases developed life-threatening complications. Two perinatal mortalities (2.32% ) occurred in this series. Birth weight of babies born to mothers with functional classes III and IV were significantly lower than those of functional classes I- II and control group. Conclusion: Rheumatic heart disease with pregnancy is still predominant in Egypt. Maternal and perinatal morbidity and mortality are strongly correlated to maternal cardiac functional classification.

关键词：母儿结局围生期新生儿出生体重心功能保健中心

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