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Validated Method for the Detection.of Three Phthalates Derived from Marin. In.ertebrates

American.Journ.l of An.lytical Chemistry 2019年第10期10卷 445-458页

作者： D. Avisar A. Kaplan.G. Ron.n.Eliraz G. Vered n. Shen.ar I. Gozlan The Water Research Cen.er School of Environment and Earth Sciences Faculty of Exact Sciences Tel Aviv University Tel Aviv Israel School of Zoology Faculty of life Sciences Tel Aviv University Tel Aviv Israel.

This study represen.s, detailly, the validated method for the extraction.an. quan.ification.of widespread phthalic acid esters (PAEs) bis(2-ethylhexyl) phthalate (DEHP), di-n.butyl phthalate (DBP) an. di-n.octyl phthalate (Dn.P) from solitary ascidian. collected from a marin. en.iron.en.. The extraction.was based on.a pressurized liquid extraction.method, usin. n.hexan. as the solven. to extract the target PAEs from dry biological tissues, an. was performed in.an.accelerated solven. extraction.in.trumen.. The average recovery of 89.2% was obtain.d from samples subjected to a pressure of ~1500 psi an. 120°C in.two 10-min.cycles. GC-MS was used for quan.ification. con.ucted in.sin.le-ion.mon.torin. mode. Followin. careful an. rigorous clean.p procedures to preven. cross-con.amin.tion.from laboratory glassware, PAE stan.ards showed sign.ls with good specificity. The obtain.d limits of detection.were 130, 122 an. 89 n./g for DEHP, DBP an. Dn.P, respectively. Accordin.ly, the calculated limits of quan.ification.were 394, 370 an. 270 n./g for DEHP, DBP an. Dn.P, respectively. The obtain.d lin.arity ran.ed from 5.4 to 269 n./ml (equivalen. to 135 - 6725 n./g dry weight), with R2 ≥ 0.998. Con.en.ration. in.the ran.e of 200 to 9000 an. 400 to 5000 n./g sample dry weight, for DEHP an. DBP, respectively, were obtain.d from the ascidian.. n. Dn.P was detected in.an. of the samples. These results in.icate that the method presen.ed in.this study is applicable for detection.of low an. trace con.en.ration. of the target PAEs in.samples collected from a marin. organ.sm, which can.serve as a bioin.icator of plastic con.amin.tion.

关键词： Phthalate Plastic Con.amin.tion Bioin.icator GC-MS ASE Marin. In.ertebrate

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Sen.itivity An.lysis on.the n.gative Degree of Difficulty Geometric Programmin. Problem

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American.Journ.l of Operation. Research 2020年第1期10卷 13-23页

作者： H. O. Amuji n. P. Olewuezi D. E. On.uegbuchun.m C. Igboan.si Departmen. of statistics Federal University of Technology Owerri Imo State Nigeria Departmen. of Maritime Man.gemen. Techn.logy Federal University of Technology Owerri Imo State Nigeria Departmen. of Tran.port Man.gemen. Techn.logy Federal University of Technology Owerri Imo State Nigeria

The ran.e of optimal values in.cost optimization.models provides man.gemen. with option. for decision.makin.. However, it can.be quite challen.in. to achieve feasible ran.e of optimality in.Geometric programmin. (Gp) models havin. n.gative degrees of difficulty. In.this paper, we con.uct sen.itivity an.lysis on.the optimal solution.of Geometric programmin. problem with n.gative degree of difficulty. Usin. imprest data, we determin. the optimal objective fun.tion. dual decision.variables, primal decision.variables;the ran.e of values, the cost coefficien. an. RHS con.train. must lie for the solution.to stay optimal. From the an.lysis, we established that in.remen.al sen.itivity an.lysis has the fun.tion.l form .

关键词： n.gative Degree of Difficulty Sen.itivity An.lysis Primal Decision Variables Dual Decision Variables Global Optimal Solution

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Effect of CaCl2, Citric Acid an. Storage Period on.Physico-Chemical Characteristics of Cherry Can.y

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Journ.l of Food Scien.e an. En.in.erin. 2011年第2期1卷 154-160页

作者： B. n. Dar H. Ahsar S. M. Wan. M. R. Dalal Departmen. of Food Scien.e an. Techn.logy PA U Ludhiana India Departmen. of Post Harvest Techn.logy SKUAST-K Srinagar India Departmen. of Food Scien.e an. Techn.logy University of Kashmir India Departmen. of Pomology SKUAST-K Srinagar India

Cherry cultivar Misri （Bigarreau n.ir Grossa） was used for makin. can.y. Pittin. of fruit was don. man.ally an. KMS （0.2%） was added for bleachin.. The fruit was pretreated usin. 4 levels of CaCl2 （Co = 0%, C1 = 1%, C2 = 1.5%, C3 = 2%） an. stored in.jars for 4 weeks. Thereafter, application.of colour was don. usin. Erythrosin. （0.05%） followed by dippin. pitted fruits in.sugar syrup for 24 hours. The samples were treated with 4 levels of citric acid （To = 0%, Tl = 1%, T2 = 1.5%, T3 = 2%） an. then.con.en.rated subsequen.ly till desired TSS of 70~ Brix was attain.d. The samples were dried in.cabin.t drier at 80 ±20 ℃till con.0}n. moisture was attain.d. The product was packed in.polyethen. pouches an. stored un.er ambien. storage con.ition.. Results revealed that there was gradual in.rease in.reducin. sugars （%）, total sugars （%） durin. storage while as moisture con.en. （%） decreased. The product developed was foun. econ.mically profitable an. viable for commercial production.

关键词： Cherry Misri can.y reducin. sugars.

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Peristaltic Blood Flow with Gold n.n.particles on.a Carreau n.n.fluid through a n.n.Darcian.Porous Medium

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Journ.l of Biomaterials an. n.n.biotechn.logy 2018年第4期9卷 290-306页

作者： n. T. Eldabe G. M. Moatimid A. A. El-Shekhipy n.glaa F. Aballah Departmen. of Mathematics Faculty of Education Ain Shams University Cairo Egypt Mathematics Departmen. Faculty of Science Imam Abdulrahman Bin Faisal University Al-Dammam KSA

The article in.estigates the in.luen.es of a variable thermal con.uctivity an. wall slip on.a peristaltic motion.of Carreau n.n.fluid. The model is con.ern.d with heat an. mass tran.fer in.ide asymmetric chan.el. The blood is con.idered as the base Carreau n.n.n.wton.an.fluid an. gold (Au) as n.n.particles stressed upon. The Fron.hien.r effect of the n.n.Darcian.medium is taken.in.con.ideration. The system is stressed upon.a stron. magn.tic field an. the Hall curren.s are completed. The problem is modulated mathematically by a system of n.n.lin.ar partial differen.ial equation. which describe the fluid velocity, temperature an. con.en.ration. The system is reformulated un.er the approximation.of lon. wavelen.th an. low Reyn.lds n.mber. It is solved on.usin. multi-step differen.ial tran.form method (Ms-DTM) as a semi-an.lytical method. A gold n.n.particle has in.reased the temperature distribution.which is of great importan.e in.destroyin. the can.er cells.

关键词： Gold n.n.particles Peristaltic Blood Flow Carreau n.n.fluid n.n.Darcy Porous Medium Variable Thermal Con.uctivity Multi-Step Differen.ial Tran.form Method

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Effect of Particulate Rein.orcemen.s on.the Mechan.cal Properties of Al6061-WC an. Al6061-Gr MMCs

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Journ.l of Min.rals an. Materials Characterization.an. En.in.erin. 2011年第12期10卷 1141-1152页

作者： A. R. K. Swamy A. Ramesha G.B. Veeresh Kumar J. n. Prakash Departmen. of Mechan.cal En.in.erin. Alpha College of Engineering Bangalore India. Departmen. of Mechan.cal En.in.erin. Amrita Vishwa Vidyapeetham Bangalore India. GATES In.titute of Techn.logy Gooty Andhra Pradesh India. Research Scholar Dr. M.G.R Educational & Research Institute Chennai & Department Mechatronics Engineering Acharya Institute of Technology Bangalore India.

This paper presen.s the comparative study of the mechan.cal properties of Al6061-Tun.sten.carbide composites con.ain.n. Tun.sten.carbide (WC) particulate, an. Al6061-graphite particulate composites con.ain.n. graphite particles. The rein.orcin. particulates in.the MMCs vary from 0% to 4% by weight. The 'vortex method' of production.was employed to fabricate the composites, in.which the rein.orcemen.s were poured in.o the vortex created by stirrin. the molten.metal by mean. of a mechan.cal agitator. The composites so produced were subjected to a series of tests. The results of this study revealed that as the Tun.sten.carbide particle con.en. was in.reased, there were sign.fican. in.reases in.the ultimate ten.ile stren.th, hardn.ss an. Youn.'s modulus, accompan.ed by a reduction.in.its ductility. There was, however, on.y a very margin.l in.rease in.the compressive stren.th, where as in.graphite rein.orced composites as the graphite con.en. was in.reased, there were sign.fican. reduction.in.hardn.ss an. mon.ton.c in.reases in.the ductility, ultimate ten.ile stren.th (UTS), compressive stren.th an. Youn.'s modulus of the composite, An.attempt is made in.the paper to provide explan.tion. for these phen.men..

关键词： Alumin.m alloys Tun.sten carbide Graphite Composites Mechan.cal properties.

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<i>In.Silico</i>Experimen.s of Carbon.Dioxide Atmosphere an. Buffer Type Effects on.the Biomimetic Coatin. with Simulated Body Fluids

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Advan.es in.Materials Physics an. Chemistry 2012年第4期2卷 239-248页

作者： Gustavo M. Platt Ivan.n. Bastos Mon.ca C. An.rade Glória D. A. Soares Federal Un.versity of Rio de Jan.iro Rio de Janeiro Brazil state Un.versity of Rio de Jan.iro Nova Friburgo Brazil

The formation.of calcium phosphate phases is extremely importan. in.a biomedical en.in.erin. con.ext. These phosphates are used in.man. application., such as grafts, drug-delivery processes an. evaluation.of the bioactivity of metallic surfaces. Con.iderin. this scen.rio, it is useful to evaluate the thermodyn.mic con.ition. for the precipitation.of phosphates of biomedical in.erest, main.y hydroxyapatite. In.this work, we in.estigate the effects of two importan. factors usin. a thermodyn.mic framework: 1) carbon.dioxide partial pressure;an. 2) buffer type (2-Amin.-2-hydroxy- methyl-propan.-1,3-diol, kn.wn.as TRIS an. 2-[4-(2-hydroxyethyl)piperazin.1-yl] ethan.sulfon.c acid, also called HEPES), on.the drivin. force behin. the precipitation.of calcium phosphates in.simulated body fluids. The in.silico results show that the pH value is govern.d by carbon.dioxide con.en., as expected to occur in.vivo. Moreover, the buffers can.deplete the free calcium available in.solution.an., con.equen.ly, can.cause difficulties in.the calcium phosphate precipitation.

关键词： Hydroxyapatite Thermodyn.mic Modellin. Carbon Dioxide HEPES an. TRIS Buffers In Silico Experimen.s

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Pin.Oak (Quercus palustris) Leaf Extract Mediated Syn.hesis of Trian.ular, Polyhedral an. Spherical Gold n.n.particles

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Advan.es in.n.n.particles 2012年第3期1卷 79-85页

作者： Jon.than.D. Judy n. V. K. V. Prasad Tollamadugu Paul M. Bertsch Departmen. of Plan. an. Soil Scien.es University of Kentucky Lexington USA In.titute of Fron.ier Techn.logy Regional Agricultural Research Station Acharya NG Ranga University Tirupati India

Fabrication.of phytogen.c metal n.n.particles is a developin. area of n.n.biotechn.logy which has econ.mic an. poten.ially eco-frien.ly advan.ages over con.en.ion.l chemical an. physical syn.hesis methods. We report the syn.hesis of an.sotropic gold n.n.structures usin. a phytoextract from the leaves of the pin.oak tree, Quercus palustris. We used 2.5%, 5%, an. 10% m/v extract con.en.ration. to determin. the importan.e of pin.oak phytoextract con.en.ration.on.the properties of the n.n.materials syn.hesized. Characterization.of the resultin. n.n.materials revealed that the con.en.ration.of the phytoextract is a key factor con.rollin. the size an. relative frequen.y of shapes the gold n.n.structures formed. TEM micrographs demon.trate that trian.ular, spherical, an. polyhedral gold n.n.structures were formed in.all treatmen.s, although UV-Vis spectra in.icated that the formation.of fewer n.n.structures in.the 2.5% m/v phytoextract treatmen. We foun. that an.sotropic n.n.structures are formed at the highest con.en.ration. in.the preparation.usin. 10% m/v phytoextract. UV-Vis, TEM, an. DLS data in.icate that the 5% m/v phytoextract results in.the syn.hesis of the smallest sized n.n.particles.

关键词： Biosyn.hesis Phytogen.c Phyton.n.techn.logy Biogen.c An.sotrops

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艾滋病并发肺结核的胸部改变(附29例X线分析)

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实用放射学杂志 1993年第2期 76-78页

作者：路晓东 B.n.n.osi 青岛医学院附属医院放射科坦桑尼亚姆嗨姆比利医疗中心

作者在坦桑尼亚工作期间,收集到一组(29例)非洲成人艾滋病并发肺结核病例。就其胸部X线表现进行了分析,较突出的表现为:(1)病变分布广泛,多同时累及两侧肺,无一例病变仅局限于上肺野。(2)合并肺门及纵隔淋巴结肿大者16例,出现率为55％。... 详细信息

作者在坦桑尼亚工作期间,收集到一组(29例)非洲成人艾滋病并发肺结核病例。就其胸部X线表现进行了分析,较突出的表现为:(1)病变分布广泛,多同时累及两侧肺,无一例病变仅局限于上肺野。(2)合并肺门及纵隔淋巴结肿大者16例,出现率为55％。(3)17例(58.6％)出现空洞。(4)5例有纤维条索影,无一例出现钙化。艾滋病并发肺结核的确诊需靠HIV血清抗体试验及痰细菌学检查。

关键词：艾滋病肺结核 X线诊断肺疾病

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Optimization.of Physical Activity as a Coun.ermeasure of Bon. Loss: A 5-Year Study of Bikram Yoga Practice in.Females

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Health 2014年第11期6卷 1124-1132页

作者： Sophia n. San.iorgio Arn.b K. Mukherjee n.cole W. Lau Apurba Mukherjee Prithwis Mukhopadhyay Edward Ebramzadeh Bikram’s Yoga College of In.ia Los Angeles USA Orthopaedic Biomechan.cs an. Mechan.-Biology Laboratory Orthopaedic Institute for Children Los Angeles USA Un.versity of Southern.Californ.a Los Angeles USA

Over the last decade, the n.mber of people diagn.sed with osteoporosis has in.reased dramatically due to man. factors. While it has been.asserted that on. variable associated with preservin. bon. health is participation.in.high-impact exercises, those same exercises are also well documen.ed to damage the hip an. kn.e join.s. Therefore, the goal of the presen. study was to evaluate the poten.ial ben.fits of a highly regimen.ed, low impact weight-bearin. exercise, Bikram Yoga. Specifically, the bon. min.ral con.en. was measured usin. DEXA an.lysis of the proximal femur an. lumbar spin. of n.n. female Bikram Yoga in.tructors between.the ages of 30 an. 59, who n.t on.y participated in.a min.mum of 3 classes (4.5 hours) a week, but also actively taught Bikram Yoga classes. These same participan.s, who remain.d active as in.tructors an. practition.rs, were rescan.ed five years later. The results of the study, which focused on.the percen. chan.e in.in.ividual bon. min.ral den.ity over the five-year period were as follows: the premen.pausal subjects showed a mean.in.rease in.BMD of 6.6% at the femoral n.ck, 2.0% for the total hip, an. 1.0% for the total lumbar spin.. In.con.rast, post-men.pausal subjects revealed a mean.decrease in.bon. min.ral den.ity (BMD) of ﹣6.0%, ﹣8.1%, an. ﹣5.6% in.the femoral n.ck, total hip, an. total lumbar spin., respectively. Con.equen.ly, the results of this study suggest that performin. Bikram Yoga may preserve, or even.perhaps, in.rease bon. min.ral den.ity in.pre-men.pausal women.an. hen.e, may be an.effective coun.ermeasure for preven.in. osteoporosis.

关键词： Osteoporosis Bon. Min.ral Den.ity (BMD) Exercise

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The Effect of Several Service an. Weatherin. Parameters on.Ten.ile Properties of PVC Pipe Materials

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Materials Scien.es an. Application. 2012年第11期3卷 784-792页

作者： n. A. Saad M. H. Al-Maamory M. R. Mohammed A. A. Hashim Sheffield Hallam Un.versity Materials and Engineering Research Institute Sheffield UK Un.versity of Babylon Faculty of Material Engineering Babylon Iraq

For water an. sewer pipes, PVC is con.idered to be on. of the best row materials. Due to its physical, chemical an. in.ustrial sign.fican. properties, PVC is commercially in.ited to be in.the first position. Man. other tradition.l raw materials;e.g. iron. con.rete, polyethylen. an. vitrified clay (VC), are comin. in.secon. position. This work is con.ucted to study the ten.ile properties of two differen. types of PVC raw materials (n.med as gray an. white) for water pipe man.facturin. by implemen.in. differen. test con.ition.. The samples were prepared by cuttin. off the pipe to an.in.ividual cross section.l size rin.s. Afterward, they were soften.d smoothly by heatin. the rin. samples to obtain.flat stan.ard ten.ile test specimen. The in.luen.e of strain.rate (crosshead speed), temperature an. UV radiation.on.the ten.ile properties of PVC pipe’s row material were in.estigated. The selected experimen.al test temperatures are (28℃, 50℃ an. 70℃), the selected crosshead speeds are (5, 50 an. 100 mm/min. an. the UV treatmen. exposure times are (168, 408, 744 an. 1080) hours. The result shows that the gray PVC pipes have ten.ile stren.th greater than.white PVC pipes. The yield stress an. modulus of elasticity are directly proportion.to strain.rate an. in.ersely proportion.to the treatmen. temperature of both PVC samples. However, the fracture strain.was in.reased with temperature an. decreased with strain.rate. UV treatmen. didn.t show a sign.fican. effect on.the yield stress an. modulus of elasticity. This is an.in.ication.of PVC lon. time stability.

关键词： PVC Mechan.cal Properties Material Treatmen.s stabilization

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