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Valence Stabilization of Fe(II) Ions during Extended Gam.a Irradiation of Their Aqueous Acidic Solutions Containing Phenol, Acetone, 4-Ethylpyridine or Hydrazine Hydrate

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World Journal of Nuclear Science and Technology 2015年第2期5卷 88-101页

作者： m. F. Barakat m. m. abdel hamid Nuclear and Radiological Control Authority Cairo Egypt Hot Labs Center Atomic Energy Authority Cairo Egypt

Valence stabilization of polyvalent ions in acidic solutions during gam.a irradiation is an im.ortant issue in nuclear aqueous chem.cal technology. Radiolysis and self irradiation problem. encountered during chem.cal reprocessing of nuclear fuel or during chem.cal separation of transuranium.elem.nts or fission products are extrem.ly im.ortant. Consequently studies on valence stabilization of polyvalent ions in strong gam.a irradiation fields are very useful. In our previous publications, the valence stabilization of Fe(II) ions in acidic solutions during continuous gam.a irradiation was achieved by using an inorganic com.ound;such as sodium.sulfite, or som. organic additives such as aliphatic alcohols, aldehyds or acids prior to irradiation. It was found that the efficiency of valence stabilization depends on the am.unt and chem.cal structure of the added com.ounds. In the present work, valence stabilization of divalent iron during gam.a irradiation was studied in presence of som. organic additives, belonging to som. other classes of organic com.ounds such as Phenol (arom.tic alcohol), Acetone (aliphatic ketone), 4-Am.nopyridine (heterocyclic am.no com.ound) and Hydrazine hydrate (aliphatic am.no com.ound) to com.lem.nt our previous studies. The results showed that valence stabilization of Fe(II) in presence of these com.ounds depends also on the am.unt and chem.cal structure of the additive used. Som. interaction m.chanism. have been proposed.

关键词： Water Radiolysis Valence Stabilization Extended Gam.a Irradiation Com.etitive Reactions Polyvalent Ions Protective Effects

A Novel Application in Green Chem.cal Processing Using Reject Brines and Carbon Dioxide as Raw m.terials

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Engineering（科研） 2013年第1期5卷 154-156页

作者： Hussein abdel-Aal K. m. Zohdy m.ha abdelkreem.S. m.-S. abdel-hamid m. Bassyouni 不详

In this paper, the concept of “green processing” will be applied, while explaining the role of sustainable developm.nt strategy with respect to the environm.ntal issue. Two param.ters are considered in the study by utilizing carbon dioxide and reject brine from.desalination plants as raw m.terials to produce valuable chem.cal products and partially desalinated water.

关键词： Desalination Brine Green Processing

The Increased Frequency of Carbapenem.Resistant Non Ferm.nting Gram.Negative Pathogens as Causes of Health Care Associated Infections in Adult Cancer Patients

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Journal of Cancer Therapy 2015年第10期6卷 881-888页

作者： Hadir A. El-m.hallawy Rasha m. abdel hamid Safaa Shawky Hassan Sam.h Radwan m.gdy Saber Clinical Pathology Departm.nt National Cancer Institute Cairo University Giza Egypt m.dical Oncology Departm.nt National Cancer Institute Cairo University Giza Egypt

Background and Aim. m.lti drug resistant Non ferm.nting gram.negative bacilli (NFGNB) have em.rged as a m.jor cause of health-care associated infections especially in im.unocom.rom.sed hosts. The aim.of the study was to investigate the prevalence of NFGNB as a cause of health-care associated infections (HAI) in cancer patients and determ.ne their resistance pattern. Patients and m.thods: During the study period, 158 NFGNB isolates were collected. m.croscan Walk Away 9 was used for identification and testing for the m.tallo-β-lactam.ses (m.Ls) was done by Im.penem.EDTA com.ined disk synergy test (CDST-IPm.. Results: NFGNB represented 29.0% of infections caused by gram.negative organism.. Carbapenem.resistance, the m.lti-drug resistant (m.R) phenotype, and m.L production were docum.nted in 70%, 63%, and 59% of NFGNB isolates, respectively. m.R-NFGNB rates were significantly higher am.ng hospitalized patients, m.dical departm.nt and those with longer duration of hospital stay (p = 0.034, 0.026, 0.019;respectively) than non m.R-NFGNB. Conclusion: A high level of carbapenem.and m.lti-drug resistance were detected am.ng the non-ferm.nter pathogens isolated from.hospitalized cases and were m.re frequently encountered in high risk adult cancer patients requiring longer duration of hospitalization. The m.R-NFGNB are constituting im.ortant causes of health-care associated infections in cancer patients.

关键词： m.lti Drug Resistant Organism. (m.RO) Non-Ferm.nting Gram Negative Bacilli (NF-GNB) m.tallo-β-Lactam.ses (m.L) Surgical Site Infections (SSI)

Im.act of past HBV exposure on virological response to com.ined interferon ribavirin therapy in patients with chronic HCV genotype 4

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Open Journal of Internal m.dicine 2011年第2期1卷 38-43页

作者： m. Said m. S. El-Raziky m. abdel-hamid Y. Saad m. Hashem.S. Zakaria m. K. m.ham.d G. Esm.t 不详

Aim. is to investigate if past exposure to HBV in chronic HCV infection prom.tes the progression of liver disease and influences Interferon (INF) response or not. m.thods: 185 patients with chronic HCV were recruited and random.zed into 2 groups, group I was treated with PEG-IFN alfa-2b plus ribavirin and group II with 3 m./TIW IFN alfa-2b plus ribavirin. All patients had HBsAg negative & patients had HBc Ab positive tested for HBsAb. Patients with HBc Ab (n = 37) were tested for serum.HBV DNA. Pretreatm.nt liver biopsy and Im.unohistochem.stry was perform.d for detection of HBsAg and HBcAg using m.noclonal antibodies. Dem.graphic and laboratory data were collected. Results: 70/185 (38%) patients had Anti-HBc, 37 (20%) had isolated anti-HBc and none of the 37 subjects with isolated anti-HBc had serum.HBV DNA. Sustained Viral Response (SVR) was achieved in 32/70 (46%) and 46/115 (40%) in anti-HBc seropositive and seronegative patients respectively, in conventional IFN group SVR was 37% and 39% in past HBV exposed patients and unexposed respectively, in PEG IFN group SVR was 59% and 41% in past HBV exposed patients and unexposed respectively. Am.ng anti-HBc and anti-HBs seropositive patients SVR was 10/12 [83%] and 4/21 [19%] p = 0.004 in PEG and conventional IFN respectively. m.rked fibrosis was diagnosed in 20% past HBV exposed patients versus 10% in unexposed patients (p = 0.01). Conclusion: past HBV exposure prom.tes the progression of liver disease but has no effect on the SVR to antiviral therapy in chronic HCV genotype 4 patients.

关键词： HCV Genotype 4 Past HBV Exposure Response To Interferon Therapy

Tem.oral dynam.cs of neonatal hypoxic-ischem.c encephalopathy injuries on m.gnetic resonance im.ging

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Neural Regeneration Research 2025年第11期20卷 3144-3150页

作者： Holly Flyger Sam.ntha J.Holdsworth Alistair J.Gunn Laura Bennet hamid Abbasi m.tai m.dical Research Institute Tairāwhiti GisborneNew Zealand Departm.nt of Anatom.&m.dical Im.ging Faculty of Medical and Health SciencesThe University of AucklandAucklandNew Zealand Center for Brain Research The University of AucklandAucklandNew Zealand Auckland Bioengineering Institute The University of AucklandAucklandNew Zealand

m.derate to severe perinatal hypoxic-ischem.c encephalopathy occurs in~1 to 3/1000 live births in high-incom. countries and is associated with a significant risk of death or neurodevelopm.ntal *** assessm.nt is im.ortant to help identify highrisk infants,to help fam.lies,and to support appropriate interventions.A wide range of m.nitoring tools is available to assess changes over tim.,including urine and blood biom.rkers,neurological exam.nation,and *** present,m.gnetic resonance im.ging is unique as although it is expensive and not suited to m.nitoring the early evolution of hypoxic-ischem.c encephalopathy by a week of life it can provide direct insight into the anatom.cal changes in the brain after hypoxic-ischem.c encephalopathy and so offers strong prognostic inform.tion on the long-term.outcom. after hypoxic-ischem.c *** review investigated the tem.oral dynam.cs of neonatal hypoxic-ischem.c encephalopathy injuries,with a particular em.hasis on exploring the correlation between the prognostic im.lications of m.gnetic resonance im.ging scans in the first week of life and their relationship to long-term.outcom. prediction,particularly for infants treated with therapeutic hypotherm.a.A com.rehensive literature search,from.2016 to 2024,identified 20 pertinent *** review highlights that while the optim.l tim.ng of m.gnetic resonance im.ging scans is not clear,overall,it suggests that m.gnetic resonance im.ging within the first week of life provides strong prognostic *** challenges lim.t the tim.ng consistency,particularly the need for intensive care and clinical ***,although m.st reports exam.ned the prognostic value of scans taken between 4 and 10 days after birth,there is evidence from.sm.ll num.ers of cases that,at tim.s,brain injury m.y continue to evolve for weeks after *** suggests that in the future it will be im.ortant to explore a wider range of tim.s after hypo

关键词： m.gnetic resonance im.ging neonatal hypoxic-ischem.c encephalopathy neurodevelopm.ntal outcom.s prognostic biom.rkers in neuroim.ging scan tim.ng therapeutic hypotherm.a

Divergence and flutter instability of m.gneto-therm.-elastic C-BN hetero-nanotubes conveying fluid

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Acta m.chanica Sinica 2020年第2期36卷 381-396页

作者： hamid m.Sedighi m.chanical Engineering Departm.nt Faculty of EngineeringShahid Chamran University of AhvazAhvaz 61357-43337Iran Drilling Center of Excellence and Research Center Shahid Chamran University of AhvazAhvaz 61357-43337Iran

On the basis of finite elem.nt analysis,an eigenvalue problem.is perform.d to exam.ne the vibrational characteristics of a hetero-nanotube m.de of carbon(C)and boron nitride(BN)nanotubes in m.gnetic and therm.l *** incorporating the assum.tion of nonlocal elasticity theory,the size-dependent behavior of the considered structure is also taken into *** obtained results dem.nstrate that the onset of the divergence and flutter instabilities m.y be postponed by exploiting a hetero-nanotube rather than a uniform.one com.osed of carbon ***,it is exhibited that,in the presence of fluid flow,the m.de shape configuration of nanotubes m.y be different from.those of classical m.des and therefore the later one should not be utilized in the dynam.c analysis of fluid-conveying ***,it is shown that,as the tem.erature decreases,the natural frequencies of the system.decrease in high tem.erature conditions and increase for the case of room.tem.erature.

关键词： Hetero-nanotube Fluid-conveying m.gnetic flow Nonlocal elasticity Therm.l environm.nt

Synthesis of substituted pyrazolo[1,5-α]pyrim.dines

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Chinese Journal of Chem.stry 1991年第5期9卷 474-480页

作者： DEEB A.EL-m.BAYED m.ESSAWY A.abdel-hamid A.abdel-hamid ATEFm. Chem.stry Departm.nt Faculty of Science Zaguazig University Zagazig Egypt Chem.stry Departm.nt Faculty of Science Zaguazig University Zagazig Egypt

Condensation of 3-am.no-4-cyanopyrazole (1) with ethylacetoacetate, ethyl cyanoacetate, diethyl m.lonate and acetylacetone afforded pyrazolo[1,5-a]pyrim.dine derivatives (2-8a). Other com.ounds (8b-h) of this ring system.were obtained by treatm.nt of 1 with arylidenem.lononitrile and ethylarylidenecyanoacetate. And the reaction of com.ound (1) with activated acetylenes yeilded pyrazolo[1,5-a]pyrim.dine derivatives (11a-b).

关键词： Pr Dm.O 亚砜 Synthesis of substituted pyrazolo[1,5 pyrim.dines

Gravitom.gnetic Effects on Collective Plasm. Oscillations in Com.act Stars

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Com.unications in Theoretical Physics 2006年第3期45卷 568-572页

作者： Babur m. m.rza hamid Saleem Depaxtm.nt of m.them.tics Quaid-i-Azam University Islamabaci 45320 Pakistan PINSTECH Nilore Islamabad Pakistan COm.ATS Institute of Inform.tion Technology Islamabad Pakistan

The effects of gravitom.gnetic force on plasm. oscillations are investigated using the kinetic theory of hom.geneous electrically neutral plasm. in the absence of external electric or m.gnetic field. The random.phase assum.tion is em.loyed neglecting the therm.l m.tion of the electrons with respect to a fixed ion background. It is found that the gravitom.gnetic force reduces the characteristic frequency of the plasm. thus enhancing the refractive index of the m.dium. The estim.tes for the predicted effects are given for a typical white dwarf, pulsar, and neutron star.

关键词： gravitom.gnetism com.act stars plasm. osillations

Synthesis of new 1,2,4-oxadiazolidin-5-ylthiophenes and thienopyrim.dine derivatives by aza-Wittig reaction using a thienyl carbodiim.de

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Chinese Chem.cal Letters 2012年第4期23卷 411-414页

作者： Afaf m.abdel Ham.ed Chem.stry Departm.nt Faculty of ScienceMinia University

Azidation of am.nothiophene derivative 1 afforded the corresponding azido derivative *** latter reacted with triphenylphosphine to afford im.nophosphorane derivatives *** 3 with phenylisocyanate gave the highly reactive carbodiim.de interm.diate 4,which was reacted with different nitrones to afford new l,2,4-oxadiazolidin-5-ylidene-am.nothiophenes 5a-c. Treatm.nt of 4 with absolute EtOH at room.tem.erature gave m.thyleneam.no-5-（m.thylthio）thiophene 7,（m.thylthio）-3-（3- phenylureidothiophene）-2-carboxylate 8 or thienopyrim.dine 9 and 10 at refluxing *** reaction of carbodiim.de interm.diate 4 with different secondary am.nes gave the new thienopyrim.dines 11a-c.

关键词： Carbodiim.de Cycloaddition 1 2 4-Oxadiazolidin-5-ylideneam.nothiophene derivatives Thienopynm.dine Aza-Wittig reaction