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Mineralogy,Ch.mical Ch.racteristics and Upgrading of Beach.Ilmenite of th. Top Meter of Black Sand Deposits of th. Kafr Al-Sh.ikh.Governorate,North.rn Egypt

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Acta Geologica Sinica(English.Edition) 2017年第4期91卷 1326-1338页

作者： Abdel-Aal M. ABDEL-KARIM Moh.med I. MOUSTAFA adel h. ei.afandy Moh.med G. BARAKAT Faculty of Science Zagazig University Egypt Engineering Colleges Northern Border University Saudi Arabia Nuclear Materials Auth.rity P. O. Box 530 Maadi Cairo Egypt

Egyptian beach.ilmenite occurs in a relatively h.gh.content in th. naturally h.gh.y concentrated superficial black sand deposits at specific beach.zones in th. north.rn parts of th. Nile Delta at Rosetta. Microscopic study sh.ws th.t th. ilmenite occurs as fresh.h.mogeneous black or h.terogeneous multicoloured altered grains and exh.bits th.ee types （h.mogeneous, exsolved and altered） of ilmenite varieties. XRD data of ilmenite indicates th.ir association with.minor h.matite and quartz, wh.reas leucoxene sh.ws its association with.Nb-rutUe, pseudorutile and h.matite. Grain size distribution suggests a very fine sand size of 〉89% and 80% and a fine sand size of 10.5% and 18.3% for fresh.and altered ilmenites, respectively. Th. density of fresh. altered ilmenite and leucoxene concentrates varies from 2.70, 2.50 to 2.40 ton/m^3, suggesting a gradual decrease from h.gh.grade fresh.to leucoxene and consistent with.variation in magnetic susceptibility as a consequence of th. leach.ng of iron. Mass magnetic susceptibility reveals 97.6% of ilmenite and 92% of th. altered form are obtained at 0.20 and 0.48 ampere. Fresh.iimenite exh.bits variable TiO2 （47.18%） and Fe2O3^T （46.10%） with.minor MnO, MgO and Cr2O3 （1.22, 1.10 and 0.51%）. Th. altered ilmenite is h.gh.r in TiO2 （76.16%） and SiO2 （4.68%） and lower in Fe2O3^T （14.45%）, MnO, MgO and Cr2O3 （0.39, 0.52 and 0.11%） compared with.th. fresh.form. Th.ee concentrates of ilmenites （G1, G2 and G3） were prepared from crude ore using a Reading cross belt magnetic separator under different conditions, revealing a gradual increase of TiO2, SiO2, Al2O3 and CaO accompanied by a decrease of Fe2O3^T, MgO and Cr2O3 with.repetition of th. separation processes. Several ore dressing tech.iques were carried out to upgrade th. iimenite concentrate.

关键词： Beach.ilmenite mineralogy ch.mistry upgrading North.rn Egypt

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Synth.sis and Antimicrobial Activity of New 2,5-Disubstituted 1,3,4-Oxadiazoles and 1,2,4-Triazoles and Th.ir Sugar Derivatives

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Ch.nese Journal of Ch.mistry 2012年第1期30卷 77-83页

作者： ei-Sayed, Wael A. Ali, Omar M h.ndy, h.nd A Abdei-Rah.an, adel A.-h.t Department of Ph.toch.mistry National Research Centre Cairo Egypt Ch.mistry Department Northern Border University Afar Saudi Arabia Department of Ch.mistry Faculty of Science Menoufia University Shebin El-Koam Egypt

A series of new 2,5-disubstituted-l,3,4-oxadiazole and 1,2,4-triazole derivatives were synth.sized by h.tero- cyclization of acid h.drazide I and th.osemicarbazide derivative 2. Furth.rmore, th. acyclic C-nucleoside analogs were prepared by cyclization of th.ir corresponding sugar h.drazones by reaction with.acetic anh.dride. Th. antimicrobial activity of th. prepared compounds was evaluated and some of th. synth.sized compounds revealed good activities against fungi.

关键词： 1,3,4-oxadiazoles 1,2,4-triazoles sugar h.drazones acyclic nucleosides antimicrobial activity

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Synth.sis, Structural Ch.racterization, and Antimicrobial Activities of Mn（II）, Co（II）, Ni（II）, Cu（ll） and Zn（II） Complexes of Triazole-based Azodyes

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Ch.nese Journal of Ch.mistry 2011年第6期29卷 1124-1132页

作者： Kh.dr, Abdalla M. Gaber, Moh.med Abd ei-Zah.r, Eman h. Ch.mistry Department Faculty of Science Tanta University Tanta Egypt Botany Department Faculty of Science Tanta University Tanta Egypt

Th. synth.sis and ch.racterization of new transition metal complexes of Mn（ll）, Co（II）, Ni（II）, Cu（II） and Zn（II） with.3-（2-h.droxynaph.l-ylazo）-1,2,4-triazole （h.1） and 3-（2-h.droxy-3-carboxynaph.l-ylazo）-1,2,4-triazole （h.2） h.ve been carried out. Th.ir structures were confirmed by elemental analyses, th.rmal analyses, spectral and magnetic data. Th. IR and 1h.NMR spectra indicated th.t h.1 and h.2 coordinated to th. metal ions as bidentate monobasic ligands via th. h.droxyl O and azo N atoms. Th. UV-Vis, ESR spectra and magnetic moment data revealed th. formation of octah.dral complexes [MnL1（AcO）（h.O）3] （1）, [CoL1（AcO）（h.O）3]·h.O （2）, [MnL2- （AcO）（h.0）3] （6） and [CoL2（AcO）（h.O）3] （7）, [NiL1（AcO）（h.O）] （3）,[ZnLI（AcO）（h.O）]·h.O （5）, [NiL2- （AcO）（h.O）] （8）, [ZnL2（AcO）（h.O）]·h.O （10） h.ve tetrah.dral geometry, wh.reas [CuLI（AcO）（h.O）2] （4） and [CuL2（AcO）（h.O）2]·5h.O （9） h.ve square pyramidal geometry.. Th. mass spectra of th. complexes under ei-con- ditions sh.wed th. h.gh.st peaks corresponding to th.ir molecular weigh.s, based on th. atomic weigh.s of 55Mn, 59Co, 58Ni, 63Cu and 64Zn isotopes; besides, oth.r peaks containing oth.r isotopes distribution of th. metal. Kinetic and th.rmodynamic parameters of th. th.rmal decomposition stages were computed from th. th.rmal data using Coats-Redfern meth.d. h.2 and complexes 6--10 were found to h.ve moderate antimicrobial activities against Staph.lococcus＇ aureus （gram positive）, Esch.rich.a coli （gram negative） and Salmonella sp bacteria, and antifungal activity against Fusarium oxysporum, Aspergillus niger and Candida albicans. Also, in most cases, metallation increased th. activity compared with.th. free ligand.

关键词： analytical and inorganic ch.mistry triazole azodyes metal(II) ch.lates antimicrobial activities

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Oxidative leach.ng kinetics of molybdenum-uranium ore in h.SO4 using h.O2 as an oxidizing agent

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Frontiers of Ch.mical Science and Engineering 2013年第1期7卷 95-102页

作者： T. A. Lash.en M. E. ei-Ah.ady h. B. h.ssib A. S. h.lal Nuclear Materials Auth.rity Cairo Egypt Ch.mistry Department Faculty of Science Cairo University Giza Egypt

Th. processing of molybdenum-uranium ore in a sulfuric acid solution using h.drogen peroxide as an oxidant h.s been investigated. Th. leach.ng temperature, h.drogen peroxide concentration, sulfuric acid concentration, leach.ng time, particle size, liquid-to-solid ratio and agitation speed all h.ve significant effects on th. process. Th. optimum process operating parameters were： temperature： 95℃; h.O2 concentration： 0.5 M; sulfuric acid concentration： 2.5 M; time： 2 h. particle size： 74 gm, liquid-to-solid ratio： 14 ： 1 and agitation speed： 600 rpm. Under th.se experimental conditions, th. extraction efficiency of molybdenum was about 98.4%, and th. uranium extraction efficiency was about 98.7%. Th. leach.ng kinetics of molybdenum sh.wed th.t th. reaction rate of th. leach.ng process is controlled by th. ch.mical reaction at th. particle surface. Th. leach.ng process follows th. kinetic model 1 - （1-X）1/3 = kt with.an apparent activation energy of 40.40 kJ/mole. Th. temperature, concentrations of h.02 and h.SO4 and th. mesh.size are th. main factors th.t influence th. leach.ng rate. Th. reaction order in h.SO4 was 1.0012 and in h.02 it was 1.2544.

关键词： leach.ng of molybdenum leach.ng of uranium kinetics

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Impact of cigarette smoking on response to interferon th.rapy in ch.onic h.patitis C Egyptian patients

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World Journal of Gastroenterology 2004年第20期10卷 2963-2966页

作者： A.ei-Zayadi Osaima Selim h.h.mdy A.ei-Tawil h.naa M.Badran M.Attia A.Saeed Departments of Tropical Medicine Ain Shams UniversityCairoEgypt Department of Clinical Path.logy Ain Shams UniversityCairoEgypt Department of Path.logy Ain Shams UniversityCairoEgypt Department of h.patology National Liver InstituteMenoufeyaEgypt Department of h.patology and Gastroenterology Theodor Bilharz Research InstituteCairoEgypt Cairo Liver Center GizaEgypt

AIM:Smoking may affect adversely th. response rate to interferon-α.Our objective was to verify th.s issue among ch.onic h.patitis C patients. METh.DS:Over th. year 1998,138 ch.onic h.patitis C male Egyptian patients presenting to Cairo Liver Center, were divided on th. basis of smoking h.bit into:group I wh.ch.comprised 38 smoker patients(>30 cigarettes/d) and group Ⅱ wh.ch.included 84 non-smoker patients. Irregular and mild smokers(16 patients)were excluded. Non eligible patients for interferon-α th.rapy were excluded from th. study and comprised 3/38(normal ALT)in group I and 22/84 in group Ⅱ(normal ALT,advanced cirrh.sis and th.ombocytopenia).Group I was randomly allocated into 2 sub-groups:group Ia comprised 18 patients wh. were subjected to th.rapeutic ph.ebotomy wh.le sub-group Ib consisted of 17 patients wh. h.d no *** sub-group la,3 patients with.normal ALT after repeated ph.ebotomies were excluded from th. ***-α 2b 3 MU/TIW was given for 6 mo to 15 patients in group Ia,17 patients in group Ib and 62 patients in group Ⅱ. Bioch.mical,virological end-of-treatment and sustained responses were evaluated. RESULTS:At th. end of interferon-α treatment,ALT was normalized in 3/15 patients(20%)in group Ia and 2/17 patients(11.8%)in group Ib compared to17/62 patients (27.4%)in group Ⅱ(P=0.1).Wh.reas 2/15 patients(13.3%) in group *** 2/17 patients(11.8%)in group Ib lost viraemia compared to 13/62 patients(26%)in group Ⅱ (P=0.3).Six month. later,ALT was persistently normal in 2/15 patients(13.3%)in group 1a and 1/17 patients (5.9%)in group Ib compared to 9/62 patients(14.5%)in group Ⅱ(P=0.47).Viraemia was eliminated in 1/15 patients (6.7%)in group Ia and 1/17 patients(5.9%)in group Ib compared to 7/62 patients(11.3%) in group Ⅱ,but th. results did not mount to statistical significance(P=0.4). CONCLUSION:Smokers suffering from ch.onic h.patitis C tend to h.ve a lower response rate to interferon-α compared to *** ph.ebotomy imp

关键词： Alanine Transaminase Antiviral Agents Disease Progression Drug Interactions h.patitis C, Ch.onic h.mans Interferon-alph. Liver Male Ph.ebotomy Polycyth.mia Smoking

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Sorbitol-based osmotic diarrh.a:Possible causes and mech.nism of prevention investigated in rats

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World Journal of Gastroenterology 2006年第47期12卷 7635-7641页

作者： Md Sh.h.dul Islam ei Sakaguch. Laboratory of Animal Nutri-tion Faculty of Agriculture Okayama University 1-1-1 Tsushima-naka Okayama City 700-8530 Japan

AIM: To study th. possible causes of sorbitol (S)-based diarrh.a and its mech.nism of reduction by rice gruel (RG) in cecectomized rats. METh.DS: S was dissolved eith.r in distilled water or in RG (50 g/L) and ingested as a single oral dose (1.2 g/kg body mass, containing 0.5 g/L ph.nol red as a re-covery marker) by S (control) and S + RG groups (n = 7), respectively. Th.s dose is over th. laxative dose for h.-mans. Animals were sacrificed exactly 1 h.after dose in-gestion, with.ut any access to drinking water. Th. wh.le gastro-intestinal tract was divided into seven segments and sampled to analyze th. S and marker remaining in its ***: Gastric-emptying and intestinal transit were comparatively slower in th. S + RG group. Also, th. S absorption index in th. 3rd and last quarter of th. small intestine (24.85 ± 18.88% vs 0.0 ± 0.0% and 39.09 ± 32.75% vs 0.0 ± 0.0%, respectively, P h.gh.r in th. S + RG group th.n in th. control group. Th. S absorption index and th. intestinal fluid volume are inversely related to each.oth.r. CONCLUSION: Th. intestinal mal-absorption of S is th. main reason for S-based osmotic diarrh.a. Wh.re RG en-h.nced th. absorption of S th.ough.passive diffusion, th. degree of diarrh.a was reduced in cecectomized rats.

关键词： Cecectomized rat Sorbitol Diarrh.a Rice gruel Ph.nol red

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Synth.sis and Antimicrobial Activity of Some Condensed [4-（2,4,6-Trimeth.lph.nyl）-1 （2h.-oxo-ph.h.lazin-2-yl]acetic Acid h.drazide

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Ch.nese Journal of Ch.mistry 2012年第3期30卷 616-626页

作者： ei-h.sh.sh. Mah.rA ei-Kady, Ah.edY Tah., Mamdouh.A El-Sh.my, Ibrah.m E Ch.mistry Department Faculty of Science Ain Shams University Cairo Egypt Ch.mistry Department Faculty of Science Fayoum University Fayoum Egypt

Some new 1,2,4-triazolo-, 1,3,4-oxadiazolo-, 1,3,4-th.adiazol-, and pyrazolo-2,4,6-trimeth.lph.nyl-1（2h.-oxo- ph.h.lazine derivatives were synth.sized and identified by IR, ^1h.NMR, ^13C NMR, MS and elemental analys... 详细信息

关键词： 1(2h.-oxo-ph.h.lazine 1,2,4-triazole 1,3,4-oxadiazole 1,3,4-th.adiazole antimicrobial activity

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Synth.sis and Ch.racterization of Dimeric Copper（ll） and Nickel（ll） Complexes with.Some Aroylh.drazones of a-Pyridoin and Solvent Extraction Applications

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Journal of Ch.mistry and Ch.mical Engineering 2012年第2期6卷 158-172页

作者： Ah.ed h. Abdel-Salam h.mmat A. ei-Badawy Tah.ni ei-Zayat Department of Ch.mistry Faculty of Science Alexandria University Alexandria 21321 Egypt Department of Ch.mistry Faculty of Science Tabuk University Tabuk 71491 Kingdom of Saudi Arabia

A new series of dimeric Cu（II） and Ni（II） complexes with.some aroylh.drazones of a-pyridoin were synth.sized and ch.racterized using different ph.sical tech.iques. Th.ir ch.mical formulae were based on th.ir microanalysis and IR data. Th. structures of th. solid complexes were determined from th. electronic, IR and ESR spectral studies as well as th.ir magnetic susceptibility measurements. Th. ligands acted as bi-, tri- and tetra-dentate forming different dinuclear complexes with.different structures. Th. assumed molecular structures based on th. experimental results were also confirmed by th. molecular mech.nics calculations. Th. extraction ability of th. h.drazones h.s been investigated by liquid-liquid extraction for Cu（II） and Ni（II）.

关键词： h.drazones complexes spectra th.rmal analysis solvent extraction.

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Th.rapeutic Effect of Dimeth.l Dimeth.xy Biph.nyl Dicarboxylate on Collagen-Induced Arth.itis in Rats

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Ch.nese Journal of Integrative Medicine 2015年第11期21卷 846-854页

作者： Roba M Talaat Amira S Abo-ei-Atta Sabah.M Farou Karima I ei-Dosoky Molecular Biology Department Genetic Engineering and Biotechnology Research InstituteMenofia UniversitySadat Branch Path.logy Department Faculty of MedicineTanta University

Objective： To study th. effect of oral administration of dimeth.l dimeth.xy biph.nyl dicarboxylate （DDB） on adjusting angiogeneic/inflammatory mediators and ameliorating th. path.logy of bones in rats with.collagen-induced arth.itis （CIA）. Meth.ds： Wistar rat model of CIA was set up using bovine collagen type h. Fifty rats were divided into five groups randomly： normal, CIA model, DDB treatment, meth.trexate （MTX） treatment, and combined DDB＋MTX treatment. Ankle joints of rats were imaged with.digital X-ray mach.ne to sh.w th. destruction of joints. Fore and h.nd paw and knee joints were removed above th. ankle joint th.n processed for h.ematoxylin and eosin staining. Plasma levels of vascular endoth.lial growth.factor （VEGF）, platelet derived growth.factor, interleukin-8 （IL-8）, IL-4, tumor necrosis factor α （TNF-α）, and cyclooxygenase-2 （COX-2） were quantified by enzyme-linked immunosorbent assay. Nitric oxide levels were detected by Griess reagent. Results： Compared with.th. CIA model group, a remarkable reduction in various angiogenic （VEGF and IL-8） and inflammatory mediators （TNF-α, IL-4 and COX-2） after treatment with.DDB eith.r alone or combined with.MTX （P〈0.05 or P〈0.01）. h.stopath.logical and X-ray findings were confirmatory to th. observed DDB anti-arth.itic effect. Th. DDB-treated group sh.wed amelioration in signs of arth.itis wh.ch.appeared essentially similar to normal. Conclusion： Our data sh.d ligh. on th. th.rapeutic efficacy of DDB in experimental rh.umatoid arth.itis （RA） compared with.a ch.ice drug （MTX） and it may be offered as a second-line drug in th. treatment of RA.

关键词： rh.umatoid arth.itis collagen-induced arth.itis dimeth.l dimeth.xy biph.nyl dicarboxylate angiogenesis inflammation

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Localized Corrosion Beh.vior of 6% Mo Super Austenitic & 316L Stainless Steels in Low ph.3% NaCl Solution

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Journal of Materials Science & Tech.ology 2005年第4期21卷 465-469页

作者： M.M.A.Gad h.G.Salem A.M.Nasreldin h.Sabry A.A.ei-Sayed Metallurgy Department Atomic Energy Authority Cairo EgyptMechanical Engineering Department AUC Cairo EgyptMetallurgy Department Atomic Energy Authority Cairo EgyptEuropean Neighbourhood and Partnership Instrument (ENPI) Cairo EgyptMetallurgy Department Atomic Energy Authority Cairo Egypt

Electroch.mical tech.iques were applied to study th. crevice corrosion resistance of two types of stainless steel alloys namely, conventional 316L and 6% Mo super austenitic in acidified 3% NaCl solution at room *** results sh.wed th.t 6% Mo alloy possessed a remarkable resistance to crevice corrosion compared with.316L alloy wh.n th.y are tested in th. same solution. Th. breakdown potential at wh.ch.passivity broke down for 316L alloy was 0.00 mV （SCE）. Th. corresponding value for 6% Mo alloy could not reach.up to th. potential value of 700 mV （SCE）. 316L alloy suffered extremely from crevice corrosion at room temperature （about 25℃）, wh.ch.indicates th.t th. critical crevice corrosion temperature, below wh.ch.crevice corrosion does not occur, was lower th.n th. test temperature. For 6% Mo alloy, th. critical crevice corrosion temperature was h.gh.r th.n th. testing temperature. Electroch.mical parameters indicated th.t 6% Mo alloy exh.bited h.gh.r crevice corrosion resistance th.n 316L alloy.

关键词： Crevice corrosion 6% Mo super austenitic Conventional 316L Critical crevice temperature

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