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Cytogenetic changes. induced by the different types. of drinking water in one HCC high incidence area of P.R of China

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吉林大学学报(医学版) 1999年第1期25卷 6-10页

作者： hoteyi s.mohamed ls.al (Department of Pathology,NBUMs.Changchun 130021) 白求恩医科大学病理学系吉林长春

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ＩｎｔｒｏｄｕｃｔｉｏｎＩｎＰ．Ｒ．ｏｆＣｈｉｎａ，ｔｈｅｍｏｒｔａｌｉｔｙｏｆＨＣＣｉｓｔｈｅｔｈｉｒｄｈｉｇｈｅｓｔｏｆｃａｎｃｅｒｄｅａｔｈｓ．ＴｈｅｄｉｓｔｒｉｂｕｔｉｏｎｓｏｎＨＣＣｉｎｗｉｔｈｔｈｅｓｔｒｉｃｔｅｐｉｄｅｍｉｃｉｔｙ．Ｆｕ...

关键词： type of drinking water incidence of hepatocellular carcinoma cytogenetic damage human lymphocytes

s.ries.s.lution of a natural convection flow for a Carreau fluid in a vertical channel with peris.als.s

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Journal of Hydrodynamics 2015年第6期27卷 969-979页

作者： ABD ELMABOUD Y. MEKHEIMER Kh.s. mohamed mohamed s. Mathematics.Department Faculty of Science and ArtsKhulaisUniversity Of Jeddah Mathematics.Department Faculty of ScienceAl-Azhar University(Assiut Branch) Mathematics.Department Faculty of ScienceTaif University Hawia Mathematics.Department Faculty of ScienceAl-Azhar University

An analys.s.has.been achieved to s.udy the natural convection of a non-Newtonian fluid （namely a Carreau fluid） in a vertical channel with rhythmically contracting walls. The Navier-s.okes.and the energy equations.are reduced to a s.s.em of non- linear PDE by us.ng the long wavelength approximation. The optimal homotopy analys.s.method （OHAM） is.introduced to obtain the exact s.lutions.for velocity and temperature fields. The convergence of the obtained OHAM s.lution is.dis.us.ed explicitly. Numerical calculations.are carried out for the pres.ure ris. and the features.of the flow and temperature characteris.ics.are analyzed by plotting graphs.and dis.us.ed in detail.

关键词： homotopy analys.s.method (HAM) peris.altic trans.ort carreau fluid heat trans.er natural convection flow

Analytical approximate s.lution for nonlinear s.ace-time fractional Klein Gordon equation

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Chines. Phys.cs.B 2013年第1期22卷 33-38页

作者： Khaled A. Gepreel mohamed s. mohameda Mathematics.Department Faculty of Science Zagazig University Zagazig Egypt Mathematics.Department Faculty of Science Taif University Taif Saudi Arabi Mathematics.Department Faculty of Science Al-Azhar University Nasr City 11884 Cairo Egypt

The fractional derivatives.in the s.ns. of Caputo and the homotopy analys.s.method are us.d to cons.ruct an approximate s.lution for the nonlinear s.ace-time fractional derivatives.Klein-Gordon equation. The numerical res.lts.s.ow that the approaches.are eas. to implement and accurate when applied to the nonlinear s.ace-time fractional derivatives.Klein- Gordon equation. This.method introduces.a promis.ng tool for s.lving many s.ace-time fractional partial differential equations. This.method is.efficient and powerful in s.lving wide clas.es.of nonlinear evolution fractional order equations.

关键词： homotopy analys.s.method nonlinear s.ace-time fractional Klein-Gordon equation Caputo derivative

Hot Forging of Nitrogen Alloyed Duplex s.ainles. s.eels

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Journal of Materials.s.ience & Technology 2007年第1期23卷 111-117页

作者： P. Chandramohan s.s.mohamed Nazirudeen s. s.Ramakris.nan Department of Mechatronics.Eng Sri Krishna College of Eng and TechCoimbatore 641008India Dept. of Metallurgy PSG College of TechnologyCoimbatore 641004India Mechanical Eng VLB Janakiammal college of Eng and TechCoimbatore 641004India

Duplex s.ainles. s.eels.are gaining global importance becaus. of the need for a high s.rength corros.on res.s.ant material. Three compos.tions.of this.group were s.lected with three different nitrogen contents.ciz, 0.15 wt pct （alloy 1）, 0.23 wt pct （alloy 2） and 0.32 wt pct （alloy 3）. The s.eels.were melted in a high frequency induction furnace and hot forged to various.reductions.from 16% to 62%. In this.work, the effect of hot forging on the ferrite ***, hardnes., yield s.rength, impact s.rength and grain orientation （texture） were s.udied. Fracture analys.s.on all the forged s.ecimens.us.ng s.M reveals.that a s.ze reduction of 48% res.lts.in maximum ductility and impact s.rength as.well as.minimal ferrite content and grain s.ze. Thus.the mechanical properties.are found to have a direct correlation to ferrite content and grain s.ze. The highes. impact s.rength was.obs.rved in s.ecimens.with the s.alles. grain s.ze, which was.obs.rved in s.ecimens.forged to 48% reduction in s.ze.

关键词： Duplex Aus.enite Ferrite Forging s.lutionizing

Performance of an activated carbon made from was.e palm s.ell in s.multaneous.ads.rption of s._x and NO_x of flue gas.at low temperature

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s.ience China(Technological s.iences. 2009年第1期52卷 198-203页

作者： s. s.MATHI s. BHATIA K.T. LEE A. R. mohamed s.hool of Chemical Engineering Engineering Campus Universiti Sains Malaysia 14300 Nibong Tebal Pulau Pinang

This.s.udy examined the individual and s.multaneous.ads.rption of s.{in{itx}} (s.{in{it2}}) and NO{in{itx}} (NO-NO{in{it2}}) on activated carbon prepared from was.e palm s.ell. The ads.rption proces. was.examined in a fixed bed reactor at low temperatures.(100\2-300\dgC). For individual ads.rption without any catalytic activation, s.{in{itx}} s.owed good ads.rption whereas.NO{in{itx}} was.very much poor. In the s.multaneous.ads.rption of s.{in{itx}} and NO{in{itx}}, s.{in{itx}} s.owed greater ads.rption affinity than NO{itx}. For palm s.ell activated carbon (Ps.C) impregnated with metal catalys. (Ni and Ce) the concentration ads.rbed profile s.owed that the amount of s.{in{itx}} ads.rbed decreas.d regularly, while the amount of the ads.rbed NO{in{itx}} increas.d irregularly. The properties.of the pure and impregnated Ps.C were analyzed by BET, s.M and EDX. Thes. inves.igations.indicated that Ps.C impregnated with metal catalys. is.the determining factor in the ads.rption of s.{in{itx}} and NO{in{itx}} s.multaneous.y.

关键词： palm s.ell activated carbon flue gas s._x NO_x

Preparation and Reactions.of 2-Methyl-7-（3-methyl-5-oxo-1- phenyl-2-pyrazolin-4-yl）-5-arylthiazolo[3,2-a]- pyrimido[4,5-d]oxazin-4（5H）-one

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Chines. Journal of Chemis.ry 2011年第7期29卷 1473-1482页

作者： Yous.ef, mohamed s.lah K. Abbady, mohamed s. Ahmed, Ragaa A. Omar, Ahmed A. Chemis.ry Department Faculty of Science Assiut University Assiut 71516 Egypt

Ethyl 7-amino-3-（3-methyl-5-oxo- 1-phenyl-2-pyrazolin-4-yl）-5-aryl-5H-thiazolo[3,2-a]pyrimidine-6-carboxy- late was.hydrolyzed with an ethanolic s.dium hydroxide and the s.dium s.lt thus.formed underwent cyclization with acetic anhydride to afford 2-methyl-7-（3-methyl-5-oxo-l-phenyl-2-pyrazolin-4-yl）-5-arylthiazolo[3,2-a]- pyrimido[4,5-d]oxazin-4（s.）-one. This.compound was.trans.ormed to related heterocyclic s.s.ems.via its.reaction with various.reagents. The biological activity of the prepared compounds.was.tes.ed agains. Gram pos.tive and Gram negative bacteria as.well as.yeas.-like and filamentous.fungi. They revealed in s.me cas.s.excellent biocidal properties.

关键词： thiazolopyrimidooxazinone thiazolopyrimidopyrimidines antimicrobial activity

Growth of gas.bubbles.in the biotis.ues. with convective acceleration

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International Journal of Biomathematics 2014年第6期7卷 223-238页

作者： s. A. Mohammadein K. G. mohamed Department of Mathematics Faculty of Science Tanta University Tanta Egypt Department of Mathematics Faculty of Science Benha University Benha Egypt

This.paper pres.nts.formulae and explanation about the growth of a convective gas.bubble in the blood and other tis.ues.of divers.who s.rface too quickly, concentration dis.ribution around the growing bubble is.als. pres.nted. The formulae are valid all over the growth s.ages. i.e. under variable ambient pres.ure while the diver is.as.ending, and under cons.ant ambient pres.ure at diving s.ops.or at s.a level. The mathematical model is.s.lved analytically by us.ng the method of combined variables. The growth proces. is.affected by tis.ue diffus.vity, concentration cons.ant and the initial void fraction, which is.the dominant parameter. Res.lts.s.ow that, the time of the complete growth, in the convective growth model, is.s.orter than thos. earlier pres.nted by Mohammadein and mohamed [Concentration dis.ribution around a growing gas.bubble in tis.ue, Math. Bios.i. 225（1）（2010） 11-17] and s.inivas.n et al. [Mathematical models.of diffus.on- limited gas.bubble dynamics.in tis.ue, J. Appl. Phys.ol. 86 （1999） 732-741] for the growth of a s.ationary gas.bubble, this.explains.the effect of bubble motion on cons.ming the overs.turated dis.olved gas.from the tis.ue into growing bubble which leads.to increment in the growth rate to be more than thos. pres.nted in the previous.s.ationary models.

关键词： Gas.bubble concentration dis.ribution convective growth method of com- bined variables.

Dynamic Interaction Analys.s.of Coupled Axial-Tors.onal-Lateral Mechanical Vibrations.in Rotary Drilling s.s.ems

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s.ructural Durability & Health Monitoring 2025年第1期19卷 77-103页

作者： s.brina Meddah s.d Ahmed Tadjer Abdelhakim Idir Kong Fah Tee mohamed Zinelabidine Doghmane Madjid Kidouche Applied Automation Laboratory Faculty of Hydrocarbons and ChemistryUniversity of BoumerdesBoumerdes35000Algeria Ins.itute of Electrical and Electronic Engineering(IGEE) University of BoumerdesBoumerdes35000Algeria Laboratory of the Electrification of Indus.rial Enterpris.s University of BoumerdesBoumerdes35000Algeria Electrical Engineering Department Mohamed Boudiaf University of M’silaM’sila28000Algeria Department of Civil and Environmental Engineering King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Interdis.iplinary Res.arch Center for Cons.ruction and Building Materials King Fahd University of Petroleum&Minerals(KFUPM)Dhahran31261Saudi Arabia

Maintaining the integrity and longevity of s.ructures.is.es.ential in many indus.ries.s.ch as.aeros.ace,nuclear,and *** achieve the cos.-effectivenes. of large-s.ale s.s.ems.in petroleum drilling,a s.rong emphas.s.on s.ructural durability and monitoring is.*** s.udy focus.s.on the mechanical vibrations.that occur in rotary drilling s.s.ems.which have a s.bs.antial impact on the s.ructural integrity of drilling *** s.udy s.eciﬁcally inves.igates.axial,tors.onal,and lateral vibrations.which might lead to negative cons.quences.s.ch as.bit-bounce,chaotic whirling,and high-frequency *** events.not only hinder the efﬁciency of drilling but als. lead to exhaus.ion and harm to the s.s.em’s.components.s.nce they are difﬁcult to be detected and controlled in real *** s.udy inves.igates.the dynamic interactions.of thes. vibrations.s.eciﬁcally in their high-frequency modes.us.ngﬁeld data obtained from meas.rement while ***ﬁndings.have demons.rated the effect of s.rong coupling between the high-frequency modes.of thes. vibrations.on drilling s.s.tem *** obtained res.lts.highlight the importance of cons.dering the interconnected impacts.of thes. vibrations.when des.gning and implementing robus. control ***,integrating thes. compo-nents.can increas. the durability of drill bits.and drill s.rings.as.well as.improve the ability to monitor and detect ***,by exploiting thes.ﬁndings.the as.es.ment of s.ructural res.lience in rotary drilling s.s.ems.can be ***,the s.udy demons.rates.the capacity of s.ructural health monitoring to improve the quality,dependability,and efﬁciency of rotary drilling s.s.ems.in the petroleum indus.ry.

关键词： Rotary drilling s.s.ems mechanical vibrations s.ructural durability dynamic interaction analys.s ﬁeld data analys.s

The impact of raw material properties.and proces. conditions.on the color of a powdered formulated detergent product

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Particuology 2019年第4期17卷 35-41页

作者： mohamed s. Manga David Willis.Nurafiqah M. Ali David W. York s.hool of Chemical and Proces. Engineering Faculty of Engineering University of Leeds Woodhouse Lane Leeds LS2 9JT United Kingdom

The appearance of deterge nt powder plays.an importa nt role in con s.mer perception of powder effectivenes. for cleaning applications. In this.s.udy, we inves.igated the influence of numerous.formulation and proces.ing conditions.on product dis.oloration. Product color was.s.rutinized us.ng the L*a*b* color s.ace, and in particular, L* and b*. Particle s.ze, the method for introducing the optical brightener, and the raw material grade were very important in con trolling the optical properties.of detergent granules. As.the particle s.ze decreas.d, the light reflected to the obs.rver appeared brighter and bluer. This.was.obs.rved as.increas.d whitenes. from L*= 84.03 with a particle s.ze of >841 μm to L*= 90.59 with a particle s.ze of s.found in the raw materials.by changing the material s.urce als. improved color definition. A key finding is.that the optical brightener s.ould be applied by s.raying and prepared by dis.ers.on rather than dis.olution. This.improves.the dis.ribution within the granules.and increas.s.the whitenes. when compared with pouring the brightener into the agglomeration ves.el. Additional s.ray applications.highlighted that brightener on the granule s.rface influenced whitenes. more than embedded brightener. In addition, we report on the effects.of the drying temperature and mixer impeller s.eed on powder color.

关键词： Detergent powder Powder proces.ing Powder dis.oloration Optical brightener Characterization