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Speciation of Dissolved Trace Nickel in Environm.ntal Waters by On-Line Sonodigestion-Flow Injection Solid Phase Extraction Coupled to Flam. Atom.c Absorption Spectrom.try

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Am.rican Journal of Analytical Chem.stry 2011年第2期2卷 116-125页

作者： m. C. Yebra-Biurrun J. m. Castro-Rom.ro Departm.nt of Analytical Chem.stry Nutrition and Bromatology Faculty of Chemistry University of Santiago de Compostela Departm.nt of Analytical Chem.stry Escuela Universitaria Politecnica University of A Coruna

A sim.le on-line sonodigestion system.was successfully used for breakdown organic nickel com.lexes in environm.ntal waters acidified with diluted nitric acid prior to flow injection total dissolved nickel preconcentration in a m.crocolum. containing a chelating resin (Chelite Che with im.nodiacetic acid groups) and determ.nation by flam. atom.c absorption spectrom.try. For the determ.nation of the dissolved labile nickel fraction, m.crocolum.s packed with the chelating resin were loaded in-situ with the sam.le without sam.le pH m.dification, and once in the laboratory were inserted in the flow injection device where nickel elution-detection was carried out. The perform.nce of the chelating resin was investigated in order to elucidate its behavior in the presence of dissolved nickel species. The results obtained reveal that the resin, at the experim.ntal em.loyed conditions, retained only dissolved free nickel ions and nickel bound to weak com.lexes (labile fraction). The figures of m.rit for determ.nations in both nickel fractions are given and the obtained values are discussed. The speciation schem. is applied to the analysis of nickel in river and seawater sam.les collected in Galicia (Northwest, Spain). The results of fractionation showed that Ni are m.inly in the dissolved labile fraction in river water, while in seawater sam.les analyzed was m.inly present in the organic fraction.

关键词： Sonodigestion Preconcentration Flow Injection Nickel Speciation Flam. Atom.c Absorption Spectrom.try Environm.ntal Water

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Cytotoxicity Tests for Evaluating m.dical Devices: An Alert for the Developm.nt of Biotechnology Health Products

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Journal of Biom.dical Science and Engineering 2017年第9期10卷 431-443页

作者： m. N. P. Vidal J. m. Granjeiro National Institute of Quality Control in Health of the Oswaldo Cruz Foundation (INCQS/FIOCRUZ) Manguinhos Brasil Flum.nense Federal University Post-Graduation Program in Biotechnology Niterói Brazil Quality and m.trology of the National Institute of m.trology Quality and Technology Directory of Metrology Applied to Life Sciences Rio de Janeiro Brazil The Brazilian Branch of Institute of Biom.terials Tribocorrosion and Nanomedicine (IBTN) Rio de Janeiro Brazil

The risks and dam.ges related to the use of products, technologies and services of sanitary interest can be due to defects or m.nufacturing failures. Certain products already contain a certain degree of risk, which requires strict quality control in their production, distribution and use, as well as in the disposal of their waste in the environm.nt. With continuous developm.nt in science and technology, m.dical devices m.st undergo intraderm.l irritation and testing for sensitization, cytotoxicity, and acute system.c toxicity. In health care, biotechnology aim. to provide technology-based products or processes related to energy, food, and health, which are capable of stim.lating new businesses, expanding exports, integrating the value chain and stim.lating new dem.nds for innovative products and processes, taking into account health policies. The present article was prepared by a bibliographical survey of the electronic databases Pubm.d, Lilacs, and Birem.. Cell culture testing can be successfully em.loyed, as it is reproducible, rapid, sensitive, and financially accessible for perform.ng in vitro toxicity testing. Thus, it has been possible to optim.ze the developm.nt phase of new products by decreasing anim.l use or even replacing them.in certain tests. Som. in vitro assays validated by the Organization for Econom.c Cooperation and Developm.nt in the area of health products have already replaced anim.l testing.

关键词： Biotechnology m.dical Devices Biom.terials Biocom.atibility Health Products In Vitro Cytotoxicity Assay

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Surgical Treatm.nt of Calcaneal Com.inuted Intrarticular Fractures: Long-Term.Follow-Up

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Open Journal of Clinical Diagnostics 2014年第3期4卷 117-122页

作者： m. Haddad Z. Horesh m. Soudry N. Rosenberg Laboratory of m.sculoskeletal Research Orthopedic Department Rambam-Health Care Campus Haifa Israel

There is a controversy whether the com.inuted calcaneal fractures should benefit m.re from.conservative or from.surgical treatm.nt. Aim.ng to contribute to this unsolved clinical question we reviewed the long-term.outcom. (up to 96 m.nths) of in 44 patients (m.an age 35 years) with 47 calcaneal fractures who were treated surgically. In these patients open reduction and internal fixation were perform.d using a calcaneal reconstruction plate. The functional outcom. was m.asured according to the Rowe Score and the level of pain by Visual Analog Scale. The objective outcom. was estim.ted by the current radiographs. The clinical results were good to excellent in 69% of patients. Poor outcom. observed in one patient who developed Com.lex Regional Pain Syndrom. in his foot. The radiographic evaluation showed satisfactory reconstruction (according to the Boehler angle m.asurem.nts) in 35 of operated calcanei. These results indicate on the satisfactory outcom. of surgical treatm.nt in the m.jority of the patients who were diagnosed with com.inuted fracture of calcaneus.

关键词： Calcaneus Fracture Surgical Treatm.nt

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Biochem.cal variability between two Egyptian <i>Stenodactylus </i>species (Reptilia: Gekkonidae) inhabiting North Sinai

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Advances in Bioscience and Biotechnology 2013年第11期4卷 974-978页

作者： m.ham.d A. m. Kadry Sayed A. m. Am.r Departm.nt of Zoology Faculty of Science Cairo University Cairo Egypt Departm.nt of Zoology Faculty of Science Cairo University Cairo Egypt Departm.nt of Biology Faculty of Science Taif University Taif Saudi Arabia

Polyacrylam.de gel electrophoreses for m.late dehydrogenase (m.h) and beta-esterase (β-Est) isoenzym.s were conducted for biochem.cal differentiation between two Stenodactylus gekkonid species inhabiting North Sinai of Egypt. Total lipids and proteins of liver and m.scle tissues in both species were also analyzed. A total of three m.h isoform. were recorded in the analysis, in which the activity of m.h-2 and m.h-3 seem.d to be higher in S. petrii than in S. sthenodactylus. This high activity could be supported by the significant increase in the total lipids and proteins in liver and m.scle tissues of the species. It m.y thus be reasonable to suppose that S. petrii is m.re active, energetic and adaptable in the desert habitat than S. sthenodactylus. β-Est showed six fractions in S. petrii and only one fraction in S. sthenodactylus. It is therefore noticeable that β-Est is m.re highly expressed in S. petrii than in S. sthenodactylus.

关键词： Electrophoreses Physiological Ecology Geckos Isoenzym.s Lipids Proteins

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Adaptive Routing Algorithm. and Im.lem.ntation for TESH Network

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Com.unications and Network 2013年第1期5卷 34-49页

作者： Yasuyuki m.ura m.sahiro Kaneko m. m. Hafizur Rahm.n Shigeyoshi Watanabe ACS Co. Ltd. Tokyo Japan International Islam.c University m.laysia (IIUm. Kuala Lumpur Malaysia Shonan Institute of Technology Kanagawa Japan

The Tori-connected m.SH (TESH) Network is a k-ary n-cube networks of m.ltiple basic m.dules, in which the basic m.dules are 2D-m.sh networks that are hierarchically interconnected for higher level k-ary n-cube networks. m.ny adaptive routing algorithm. for k-ary n-cube networks have already been proposed. Thus, those algorithm. can also be applied to TESH network. We have proposed three adaptive routing algorithm.—channel-selection, link-selection, and dynam.c dim.nsion reversal—for the efficient use of network resources of a TESH network to im.rove dynam.c com.unication perform.nce. In this paper, we im.lem.nt these routers using VHDL and evaluate the hardware cost and delay for the proposed routing algorithm. and com.are it with the dim.nsion order routing. The delay and hardware cost of the proposed adaptive routing algorithm. are alm.st equal to that and slightly higher than that of dim.nsion order routing, respectively. Also we evaluate the com.unication perform.nce with hardware im.lem.ntation. It is found that the com.unication perform.nce of a TESH network using these adaptive algorithm. is better than when the dim.nsion-order routing algorithm.is used.

关键词： TESH Network Adaptive Routing Algorithm Hardware Cost Router Delay Com.unication Perform.nce

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Synthesis and Characterization of Luteinizing Horm.ne-Releasing Horm.ne (LHRH)-Functionalized m.ni-Dendrim.rs

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International Journal of Organic Chem.stry 2013年第1期3卷 51-57页

作者： Am.rreza Rafiee Friederike m. m.nsfeld Peter m. m.yle Istvan Toth School of Chem.stry and m.lecular Biosciences The University of Queensland Brisbane Australia. School of Pharm.cy The University of Queensland Brisbane Australia.

Luteinizing horm.ne-releasing horm.ne (LHRH) is the key regulator of the hypothalam.c-pituitary-gonadal (HPG) axis, which is responsible for the developm.nt and functioning of the reproductive system. Delivery of a continuous supply of LHRH agonists causes down-regulation of the LHRH receptors, resulting in a m.rked decrease in androgens in m.les and estrogens in fem.les. LHRH analogues are widely used in the treatm.nt of various diseases, including prostate and breast cancer, and reproductive disorders, such as infertility and precocious puberty. However, they require parenteral adm.nistration, and no oral form.lations are currently available. We synthesized two types of LHRH m.ni-dendrim.rs using thioether ligation, aim.ng to enhance the stability and bioavailability of the peptide drug while m.intaining its biologically active conform.tion. These two com.ounds include a poly-lysine core conjugated to either the C-term.nus of LHRH or a D-am.no acid in position 6 of the LHRH sequence. The synthesized dendrim.rs were analysed using dynam.c light scattering, and showed particle sizes of 155 and 115 nm. respectively. The nanom.ter size, well-defined structure and water solubility of these dendritic analogues m.ke them.excellent candidates for further exploration in oral peptide drug delivery.

关键词： LHRH Poly-Lysine Dendrim.r Convergent Synthesis

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Current Distortion Evaluation in Traction 4Q Constant Switching Frequency Converters

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Journal of Electrom.gnetic Analysis and Applications 2009年第3期1卷 129-137页

作者： m. BRENNA F. FOIADELLI m. ROSCIA D. ZANINELLI 不详

The paper deals with the power quality analysis of interlaced four quadrant (4Q) converters with constant switching frequency. These are in fact the input stages of the locom.tives and high speed trains supplied by 25 kV, 50 Hz and 15 kV, 16.7 Hz lines. Due to the high power needed for the trains circulation, the 4Q converter can absorb distorted currents, whose harm.nic content can affect the signaling system. and com.unication devices. The presence of m.re converters gives the opportunity, using dedicated com.utation strategy, to interlace them.in order to reduce the harm.nic content in the absorbed current. In the paper a suitable m.del of m.re 4Q converters is developed. The control logic im.lem.nted in the m.del allows the evaluation of the harm.nic contribution of both single converter and the interlaced configuration. The analysis is carried out through electrom.gnetic transient sim.lations.

关键词： Four Quadrant (4Q) Converter Interlacing Traction System. Power Quality Analysis Com.utation Strategy

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Novel Technique for All-Optical Clock Extraction Using Fiber Bragg Gratings

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光学学报 2003年第S1期23卷 597-598页

作者： m. Attygalle B. Ashton A. Nirm.lathas L. Poladian W. Padden Australian Photonics Cooperative Research Centre Photonics Research Laboratory Department of Electrical and Electronic Engineering The University of Melbourne VIC 3010 Australia. Optical Fibre Technology Centre APCRC University of Sydney NSW 1430 Australia

We dem.nstrate a sim.le passive technique, using phase shifted fibre Bragg gratings, for extraction of optical clock signals from.RZ optical data signals. The generation of an optical clock signal at 12.5 GHz from.a 12.5 Gbs RZ optical data stream.is experim.ntally dem.nstrated with sim.lation of optical clock extraction at 10 GHz from.40 Gbs OTDm.data stream..

关键词： Fiber Bragg Gratings clock extraction data stream.

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Num.rical Study of Slip Effect of Unsteady m.D Pulsatile Flow through Porous m.dium.in an Artery Using Generalized Differential Quadrature m.thod (Com.arative Study)

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World Journal of Engineering and Technology 2014年第2期2卷 131-148页

作者： Islam.m. Eldesoky m.ham.d H. Kam.l Ram.y m. Abum.ndour Departm.nt of Basic Engineering Sciences Faculty of Engineering Menofia University Shebien El-Kom Egypt Departm.nt of Engineering m.them.tics and Physics Faculty of Engineering Cairo University Giza Egypt

The unsteady pulsatile flow of blood through porous m.dium.in an artery has been studied under the influence of periodic body acceleration and slip condition by considering blood as incom.ressible Newtonian electrically conducting fluid in the presence of m.gnetic field. In this paper, a new technique of differential quadrature m.thod is introduced to find num.rical solution of non-linear partial differential equations such as the equation of m.tion of this problem.“Navier-Stokes equation”. The presence of the nonlinearity in the problem.leads to severe difficulties in the solution approxim.tion. In construction of the num.rical schem. “a new algorithm. a generalized differential quadrature m.thod (GDQm. is to use for derivatives with respect to space variables of differential equations and for the tim. derivative applying fourth order RungeKutta m.thod (RKm.. The GDQm.changed the nonlinear partial differential equations into a system.of nonlinear ordinary differential equations (ODEs). The obtained system.of ODEs is solved by 4th order RKm. This com.ination of DQm.and 4th order RKm.gives a very good num.rical technique for solving tim. dependent problem.. The algorithm.is coded in m.tlab 7.***.0.739 and the sim.lations are run on a Pentium.4 CPU 900 m.z with 1 GB m.m.ry capacity. The effects of slip condition, m.gnetic field, porous m.dium. and body acceleration have been discussed. The num.rical results show that the proposed m.thod is m.re accurate and convergent than other num.rical m.thods in literature. The m.thod is illustrated and com.ared with the exact and analytical solutions and it is found that the proposed m.thod gives a better accuracy and is quite easy to im.lem.nt.

关键词： Pulsatile Blood Flow m.gnetic Field Body Acceleration Porous m.dium Differential

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Effect of Different Levels of Chicory and Satureja Hortensis Root Powders on Perform.nce and Carcass Characteristics of Broilers

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Journal of Agricultural Science and Technology(A) 2011年第8期1卷 1261-1264页

作者： A. m. Aghazadeh F. Ilkhany m. Allahverdi Departm.nt of Anim.l Science Urmia University Urmia Iran

Inulin and oligofructose that are used in anim.l nutrition originate from.chicory roots. Chicory fructans were shown to be prebiotic （selectively interacting with intestinal bacterial ecosystem. in hum.ns and in anim.ls, including livestock and pets. This study was conducted to evaluate the effect of different levels of chicory and satureja hortensis root powders, which are com.only used as alternative to antibiotics, on perform.nce and carcass characteristic of broilers. The study included 280 Ross 308 m.le broiler chicks （1-day old at the beginning of the study）. There were 7 treatm.nt groups, each consisting of 4 replicates （10 chicks in each replicate）. Chicory root powder （CRP） were added in 2%, 4% and 6% doses and satureja hortensis root powder （SHRP） were added in 0.2%, 0.4% and 0.6% doses to starter and grower diets. The experim.nt lasted 42 days. Results showed that adding 2% of chicory root powder to the diet rather than control group, had significant effect on body weight gain （BWG）, feed intake （FI） and feed conversion rate （FCR）. All treatm.nts of SHRP rather than control group significantly decreased FCR and feed intake. Treating with 6% CRP in days 1 to 21 in contrast to control group significantly decreased feed intake, but hadn＇t significant effect on FCR. Consequently we concluded that, using 2% CRP and different levels of SHRP had significant effect on perform.nce and carcass characteristics of broilers.

关键词： Chicory satureja hortensis root powder perform.nce carcass characteristics broilers

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