检索结果-南通市图书馆

Agricultural Sciences 2013年第4期4卷 165-174页

作者： Wafaa M. Haggag mostafa Abo el Soud Biotechnology and Genetic Engineering Unit National Research Center Cairo Egypt Department of Plant Pathology National Research Center Cairo Egypt

Penicillium oxalicum Curie et Thom isolated from blossom of mango (var. Saddekia) was evaluated against mango malformation incited by Fu- sarium subglutinis. Both in vitro and in vivo conditions. The mechanism of this isolate for controlling Fusarium was the reduction of growth development. The Penicillium oxalicum isolate produced extracellular cellulolytic enzymes (exo-glucanase or cellobiohydrolases and endo-glucanase, that possibly related to the biocontrol process. Optimize and fermentation conditions (growth period, carbon and nitrogen sources) for spores and cellulolytic enzymes production were determined. Liquid formulation containing (6 × 106) with sodium alginate (0.5%) and Tween 80 (0.01%) was used. For field evaluation, susceptible cultivars as Ewais, Saddika, Alphonso, Taimour and Zebda were selected. Liquid bioformulations were sprayed twice and 30 days intervals. The spray was initiated from pre-flowering stage. Bioformulation was found to be significant in reducing the malformation incidence. Results cleared that spraying of liquid bioformulations, substantially improved the fruit numbers and yield for the five mango cultivars and suggested to be most promotive for fairly quality in tested cultivars.

关键词： Antagonist Biocontrol Fusarium subglutinis Mango Malformation Penicillium oxalicum

Influence of Nano-Barium Sulfate Agglomeration on Microstructure and Properties of the Hardened Cement-Based Materials

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science and Chemical Engineering 2015年第11期3卷 72-81页

作者： Mohamed el-Shahate Ismaiel Saraya Inas mostafa Bakr Department of Chemistry Faculty of Science Al-Azhar University Cairo Egypt Faculty of Engineering Mattareya Helwan University Cairo Egypt

The aim of the present work is to study the effect of Nano-barium sulfate additions on the physic-mechanical properties of hardened cement pastes. Nano-barium sulfate was prepared by the precipitation method. Eight mixes of filled cement pastes containing 0.5 wt%, 1.0 wt%, 1.5 wt% and 2.0 wt% of both nano-barium sulfate and micro-limestone were prepared and compared to the base OPC. The hydration characteristics were evaluated by the measure of combined water content, bulk density, total porosity and compressive strength for samples hydrated up to 90 days. The progress of hydration reactions was followed up by XRD analysis. The morphology and microstructure were studied by SEM. Nano-size barium sulfate acted as a nucleating agent and enhanced the hydration of cement pastes up to 2.0% mass content. Also, the microstructure was improved considerably. Accordingly, nano-size barium sulfate can be used successfully in the preparation of filled cement.

关键词： Nano-Barium Sulfate Cement Paste Filler Compressive Strength Microstructure

Role of Cell Surface Structures in Biofilm Formation by Escherichia coli

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food and Nutrition Sciences 2015年第12期6卷 1160-1165页

作者： Hafida Zahir Hamadi Fatima Lekchiri Souad Mliji el mostafa ellouali mostafa Latrache Hassan Bioprocess and Biointerface Laboratory Faculty of Science and Techniques Sultan Moulay Slimane University Beni Mellal Morocco Laboratory of Biotechnology and Valorisation of Natural Resources Department of Biology Faculty of Science University Ibn Zohr Agadir Morocco Food Safety & Environmental Department Institute Pasteur Casablanca Morocco

This study aims to understand the relationship between capabilities of Escherichia coli strains to form biofilm and serotype groups expressed on cell surface. Sixteen strains of E. coli were originally isolated from different food processing lines in different Moroccan cities. Strains serotyped based on their O (somatic), H (flagellar), and K (capsular) surface antigen profiles using different antiserums. Biofilm assays carried out in 96-well microtiter dishes using the method of O’Toole et al. Our results show that no clear relation observed between origin and serotype groups. In the other hand, we observed that not all studied strains were able to form biofilm. Furthermore, combination of antigens H40 and K11 appears to be involved in biofilm formation. In fact, the H antigen seems to be implicated in the placement of the bacterial cells near the surface and the K antigen may play a role in physicochemical interactions between bacteria and inert surface.

关键词： Biofilm Escherichia coli Cell Surface Serotype Antigen Bacterial Adhesion

Efficient Utilization of 6-Aminouracil to Synthesize Fused and Related Heterocyclic Compounds and Their Evaluation as Prostate Cytotoxic Agents with Cathepsin B Inhibition

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Medicinal Chemistry 2014年第2期4卷 39-60页

作者： Marwa Taha mostafa Sarg Shereen Said el-Shaer Department of Biochemistry Faculty of Pharmacy (Girls) Al-Azhar University Cairo Egypt Department of Organic Chemistry Faculty of Pharmacy (Girls) Al-Azhar University Cairo Egypt

6-aminouracil 1 was utilized to introduce different heterocyclic rings at C-6 position through various synthetic strategies. The synthesized compounds bear rings that are either directly attached to the uracil back bone as in compounds 6, 12a-c and 15, or attached through an amino bridge as compounds 3a-c, 5a, b, 7a, b, 9 and 10, or through an imino bridge as compound 18. Also, compounds 4, 8, 11a-c, 14, 16 and 17 bearing biologically active side chains were synthesized. In addition to, compounds 13, 19, 20, 21 and 22 bear fused rings to the uracil backbone. All synthesized compounds were evaluated for their anticancer activity against prostate PC3 cell line using in-vitro sulforhodamine-B (SRB) method, from which compounds 3a, c, 4, 5a, b, 6, 7a, b, 11a-c, 12a, b, 17 and 20 were the most active. These active compounds were further evaluated for their ability to inhibit cathepsin B enzyme by using enzyme-linked immunosorbent assay, which revealed that compounds 5a, b, 7a, 11a, 12a and 17 exhibited more than 50% inhibition of cathepsin B. Among which the phenyl thiourea derivative 17 was the most active exhibiting 82.3% inhibition, while the reference doxorubicin exerted 18.7% inhibition.

关键词： Uracil Cytotoxicity PC3 Cell Line Cathepsin B

Production and Optimization of Pseudomonas fluorescensBiomass and Metabolites for Biocontrol of Strawberry Grey Mould

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2012年第7期3卷 836-845页

作者： Wafaa M. Haggag mostafa Abo el Soud Biotechnology and Genetic Engineering Unit National Research Center Dokki Cairo Egypt. Department of Plant Pathology National Research Centre Dokki Cairo Egypt

Pseudomonas species have been widely studied as biological agents (BCAs) and it is alternative to the application of chemical fungicides. Our objective was to optimize nutritional and environmental conditions of the isolated Pseudomonas fluorescens fp-5 for biomass and metabolites production and to evaluate itsagainst the grey mould disease caused by Botrytis cinerea on strawberry plants under field conditions. Pseudomonas fluorescens, showed antagonistic properties, in vitro, against thepathogen Botrytiscinerea. Effect of the separated secondary metabolites on the fungal growth by broth dilution technique and antifungal activity by agar well diffusion technique was studied. Response surface methodology was used to investigate the effects of four fermentation parameters (pH, incubation time, carbon and nitrogen concentrations) on biomass and bioactivemetabolites [antibiotic phenazin and siderophore] production. Glycerol was found to be the best carbon source for improved biomass and metabolites production. Meanwhile, peptone and yeast extract were found to be the best nitrogen source. Analysis of each formulation revealed that glycerol oil at 0.01% the best oil used for protect P. fluorescens for 3 months Under natural condition, P. fluorescens formulation was effective in reducing B. cinerea disease in strawberry leaves and fruits. Pre-harvest treatment protected fruits from Botrytis post-harvest disease in comparing of fungicide. In addition, the obtained results showed that bacterial treatment significantly increased thegrowth parameters as well as dry weights and yield.

关键词： Botrytis Bunch Rot Pseudomonas fluorescens Strawberry Blight

Treatment success of transobturator tape compared with tension free vaginal tape for stress urinary incontinence at 24 months: A randomized controlled trial

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Obstetrics and Gynecology 2014年第3期4卷 169-175页

作者： Mahmoud Fathy Hassan Osama el-Tohamy mostafa Kamel Faculty of Medicine Ain-Shams University Cairo Egypt Faculty of Medicine Zagazig University Zagazig Egypt

Objective: To compare the long term efficacy of transobturator Tape (TOT) with tension free vaginal tape (TVT) at 24 months postoperatively. Patients & Methods: 160 women with stress urinary incontinence (SUI) were randomly allocated to either TVT or TOT procedures and reviewed at 24 months after surgery. The primary outcomes were objective cure (a negative cough stress test, and a negative 1-hour pad test), and subjective cure (defined as “very much better” or “much better” improvement in the Patient Global Impression of Improvement scale). The secondary outcomes included incontinence related quality of life (using Urogenital Distress Inventory Questionnaire, and Incontinence Impact Questionnaire), and complications. Results: No statistical difference was reported in objective and subjective cure rates between both groups. Objective cure rate was 85.6% and 81.6% in the TOT and TVT groups respectively (P = 0.55). Subjective cure rate in the TOT and TVT groups were 87% and 83% respectively (P = 0.68). There were no significant differences in postoperative complications and incontinence related quality of life. However, the operating time was significantly shorter in the TOT group compared with the TVT group (22.6 ± 3.9, 27.1 ± 3;respectively, P < 0.001). Conclusion: TOT and TVT procedures were equally efficient and safe for treatment of SUI, with maintenance of high objective and subjective cure rates for 24 months. Longer follow-up is needed to confirm these results.

关键词： Urinary Incontinence Stress Suburethral Slings TOT TVT

Biological and molecular studies on specific immune cells treated with checkpoint inhibitors for the thera-personal approach of breast cancer patients(ex-vivo study)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Oncology Research 2021年第5期29卷 319-330页

作者： MOTAWA E.el-HOUSEINI mostafa S.ARAFAT AHMED M.el-HUSSEINY ISLAM M.KASEM MAHMOUD M.KAMel AHMED H.el-HABASHY MEDHAT M.KHAFAGY ENAS M.RADWAN MAHA H.HelAL MONA S.ABDelLATEIF Medical Biochemistry and Molecular Biology Cancer Biology DepartmentNational Cancer InstituteCairo UniversityCairo11976Egypt Biotechnology Department Faculty of ScienceCairo UniversityGiza12613Egypt Zoology department Faculty of ScienceCairo UniversityGiza12613Egypt Clinical Pathology Department National Cancer InstituteCairo UniversityCairo11976Egypt Department of Pathology National Cancer InstituteCairo UniversityCairo11976Egypt Surgical Oncology Department National Cancer InstituteCairo UniversityCairo11976Egypt Radio-Diagnosis Department National Cancer InstituteCairo UniversityCairo11976Egypt

Immunotherapy becomes a promising line of treatment for breast cancer(BC)however,its success rate is still ***:The study was designed to optimize the condition for producing an effective dendritic cell(DCs)based immunotherapy by using DCs and T lymphocytes together with tumor-inﬁltrating lymphocytes(TILs)and tumor-inﬁltrating DCs(TIDCs),treated with anti-PD1 and anti-CTLA4 monoclonal *** mixture of immune cells was co-cultured with autologous breast cancer cells(BCCs)isolated from 26 BC ***:There was a signiﬁcant upregulation of CD86 and CD83 on DCs(p=0.001 and 0.017,respectively),similarly upregulation of CD8,CD4 and CD103 on T cells(p=0.031,0.027,and 0.011,respectively).While there was a signiﬁcant downregulation of FOXP3 and combined ***8 expression on regulatory T cells(p=0.014 for both).Increased CD8/Foxp3 ratio(pely).There was a signiﬁcant increase in interferon-γ(IFN-γ,pelial growth factor(VEGF,pell death ligand 1(PDL-1)were downregulated in BCCs(pell death 1(PD-1,pells(DCs,T cells,TIDCs,and TILs)with immune checkpoint inhibitors could produce a potent and effective BC ***,these data should be validated on an experimental animal model to be transferred to the clinical setting.

关键词： Immunotherapy breast cancer PD1 CTLA4 TIDCs TILs

Intensive care unit readmission in adult Egyptian patients undergoing living donor liver transplant:A single-centre retrospective cohort study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Hepatology 2022年第6期14卷 1150-1161页

作者： Manar Salah Iman Fawzy Montasser Hanaa A el Gendy Alaa A Korraa Gamal M elewa Hany Dabbous Hossam R Mahfouz mostafa Abdelrahman Mohammed Hisham Goda Mohamed Mohamed Bahaa el-Din Mahmoud el-Meteini Heba A Labib Department of Tropical Medicine Ain Shams Center for Organ TransplantationAin Shams UniversityCairo 11566Egypt Department of Anaesthesia and Critical Care Ain Shams Centre for Organ TransplantationAin Shams UniversityCairo 11566Egypt Department of General Surgery and Liver Transplantation Ain Shams Centre for Organ TransplantationAin Shams UniversityCairo 11566Egypt

BACKGROUND Patients who undergo living donor liver transplantation(LDLT)may suffer complications that require intensive care unit(ICU)*** To identify the incidence,causes,and outcomes of ICU readmission after *** A retrospective cohort study was conducted on patients who underwent *** collected data included patient demographics,preoperative characteristics,intraoperative details;postoperative stay,complications,causes of ICU readmission,and *** were divided into two groups according to ICU readmission after hospital *** factors for ICU readmission were identified in univariate and multivariate *** The present study included 299 ***-one(10.4%)patients were readmitted to the ICU after *** who were readmitted to the ICU were older in age(53.0±5.1 vs 49.4±8.8,P=0.001)and had a significantly higher percentage of women(29%vs 13.4%,P=0.032),diabetics(41.9%vs 24.6%,P=0.039),hypertensives(22.6%vs 6.3%,P=0.006),and renal(6.5%vs 0%,P=0.010)patients as well as a significantly longer initial ICU stay(6 vs 4 d,respectively,Pelp provide optimal care and tailor follow-up to reduce the rate of ICU readmission.

关键词： Intensive care units Liver transplantation Patient readmission Risk factors

Positional effect of mutations in 5'UTR of hepatitis C virus 4a on patients' response to therapy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2009年第12期15卷 1480-1486页

作者： mostafa K el Awady Hassan M Azzazy Ahmed M Fahmy Sherif M Shawky Noha G Badreldin Samar S Yossef Moataza H Omran Abdel Rahman N Zekri Said A Goueli Department of Biomedical Technology National Research CenterDokkiCairo 12622Egypt Department of Chemistry and Yousef Jameel Science and Technology Research Center the American University in CairoCairo 11511Egypt Structural biology department Free University of AmsterdamDe Boelelaan 10851081 HV AmsterdamThe Netherlands National Cancer Institute Cairo 11796Egypt Department of Pathology and Laboratory Medicine University of WisconsinMadisonWI 53711United States

AIM： To investigate the effects of mutations in domain Ⅲ of the hepatitis C virus （HCV） internal ribosome entry sequences （IRES） on the response of chronic HCV genotype 4a patients to interferon therapy.METHODS： HCV RNA was extracted from 19 chronic HCV 4a patients receiving interferon/ribavirin therapy who showed dramatic differences in their response to combination therapy after initial viral clearance. IRES domain Ⅲ was cloned and 15 clones for each patient were sequenced. The obtained sequences were aligned with genotype 4a prototype using the ClustaIW program and mutations scored. Prediction of stem-loop secondary structure and thermodynamic stability of the major quasispecies in each patient was performed using the MFOLD 3.2 program with Turner energies and selected constraints on base pairing.RESULTS： Analysis of RNA secondary structure revealed that insertions in domain Ⅲ altered WatsonCrick base pairing of stems and reduced molecular stability of RNA, which may ultimately reduce binding affinity to ribosomal proteins. Insertion mutations in domain - were statistically more prevalent in sustained viral response patients （SVR, n = 14） as compared to breakthrough （BT, n = 5） patients.CONCLUSION： The influence of mutations within domain Ⅲ on the response of HCV patients to combination therapy depends primarily on the position, but not the frequency, of these mutations within IRES domain Ⅲ.

关键词： Hepatitis C virus Internal ribosome entrysequences Domain Ⅲ Genotype 4a Ribosomal sub-unit Interferon therapy RNA folding

Circulating microRNA 9-3p and serum endocan as potential biomarkers for hepatitis C virus-related hepatocellular carcinoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Hepatology 2021年第11期13卷 1753-1765页

作者： Amany Mohamed Salah eldin Wahb Mohamed el Kassas Ahmed Kamal Khamis mostafa elhelbawy Nesreen elhelbawy Mona Salah eldin Habieb Department of Medical Biochemistry and Molecular Biology Faculty of MedicineHelwan UniversityCairo 11795Egypt Department of Endemic Medicine Faculty of MedicineHelwan UniversityCairo 11795Egypt Department of Hepatology and Gastroenterology National Liver InstituteMenoufia UniversityShebin Elkom 32512MenoufiaEgypt Department of Medical Biochemistry and Molecular Biology Faculty of MedicineMenoufia UniversityShebin Elkoum 3511Egypt

BACKGROUND The high mortality rate of hepatocellular carcinoma(HCC)in Egypt is due mainly to the increasing prevalence of hepatitis C virus infection(HCV)and late diagnosis of the ***(miRNA),which regulate tumor proliferation and metastasis in HCC,may serve as a useful diagnostic approach for the early detection of HCC,thus decreasing its ***,endocan is a protein with angiogenic and inflammatory properties that are associated with tumor progression and poor *** To analyze the levels of miRNA 9-3p and endocan in HCV-infected HCC patients and correlate them with clinicopathological *** We compared levels of endocan and circulating miRNA 9-3p from 35 HCVrelated HCC patients to 33 patients with HCV-induced chronic liver disease and 32 age and gender matched healthy controls recruited from inpatient and outpatient clinics of the National Liver Institute,Menoufia University,Egypt in the period from January to March 2021 in a case-control *** samples from all groups were analyzed for *** was measured by enzymelinked immunosorbent assays,and the expression levels of circulating miRNA 9-3p were measured by real-time quantitative reverse transcriptase *** The levels of circulating miRNA 9-3p were significantly lower in the HCC group compared to the chronic liver disease(Pels in the chronic liver disease were significantly lower than those in the control group(Pels of serum endocan were significantly higher in the HCC group compared to the chronic liver disease(Pels of miRNA 9-3p were significantly inversely correlated to vascular invasion(P=0.002),stage of advancement of Barcelona Clinical Liver Cancer(P<0.001)and the metastatic site(P<0.001)of the HCC ***

关键词： MicroRNA 9-3p Hepatocellular carcinoma Endocan Diagnostic Biomarker Egypt