1,300 research outputs found
Development of Zein-Pectin Nanoparticle as Drug carrier
Recent years have witnessed tremendous growth of nanotechnology based drug delivery system which reduces drug toxicity and side effects and increases the therapeutic index of the drug. Aim of the study is to develop a biodegradable, non-toxic nanoparticle, solely from natural polymers. Zein – pectin nanoparticle comprising of a hydrophobic zein core and a hydrophilic pectin shell was developed by ultrasonication method. SEM images confirm the nanosize of the nanoparticle. UV- Visible and FT-IR spectroscopic results confirm the incorporation of zein, pectin and the encapsulation of the model drug quercetin in the nanoparticle. Zein is a prolamine class of protein found in wheat, maize etc and pectin is a polymer of galacturonic acid units found in plant cell wal
New results from the NA57 experiment
We report results from the experiment NA57 at CERN SPS on hyperon production
at midrapidity in Pb-Pb collisions at 158 GeV/ and 40 GeV/.
, and yields are compared with those from the STAR
experiment at the higher energy of the BNL RHIC. , , \
and preliminary transverse mass spectra are presented and interpreted
within the framework of a hydro-dynamical blast wave model.Comment: 8 pages, 3 figures, contribution to the proceedings of The XXXVIIIth
Rencontres de Moriond "QCD and High Energy Hadronic Interactions
Strangeness enhancements at central rapidity in 40 A GeV/c Pb-Pb collisions
Results are presented on neutral kaon, hyperon and antihyperon production in
Pb-Pb and p-Be interactions at 40 GeV/c per nucleon. The enhancement pattern
follows the same hierarchy as seen in the higher energy data - the enhancement
increases with the strangeness content of the hyperons and with the centrality
of collision. The centrality dependence of the Pb-Pb yields and enhancements is
steeper at 40 than at 158 A GeV/c. The energy dependence of strangeness
enhancements at mid-rapidity is discussed.Comment: 15 pages, 10 figures and 3 tables. Presented at International
Conference on Strangeness in Quark Matter (SQM2009), Buzios, Rio de Janeiro,
Brazil, 27 Sept - 2 Oct 2009. Submitted to J.Phys.G: Nucl.Part.Phys, one
reference adde
Results on hyperon production from the NA57 experiment
Recent results on hyperon production in Pb--Pb collisions from the NA57
experiment are reported. Strangeness enhancement and the transverse mass
spectra properties at 158 GeV per nucleon are described.Comment: submitted to Acta Phys. Hung. A (Heavy Ion Physics
Strange particle production in 158 and 40 GeV/ Pb-Pb and p-Be collisions
Results on strange particle production in Pb-Pb collisions at 158 and 40
GeV/ beam momentum from the NA57 experiment at CERN SPS are presented.
Particle yields and ratios are compared with those measured at RHIC.
Strangeness enhancements with respect to p-Be reactions at the same beam
momenta have been also measured: results about their dependence on centrality
and collision energy are reported and discussed.Comment: Contribution to the proceedings of the "Hot Quarks 2004" Conference,
July 18-24 2004, New Mexico, USA, submitted to Journal of Physics G 7 pages,
5 figure
Challenging the challenge: handling data in the Gigabit/s range
The ALICE experiment at CERN will propose unprecedented requirements for
event building and data recording. New technologies will be adopted as well as
ad-hoc frameworks, from the acquisition of experimental data up to the transfer
onto permanent media and its later access. These issues justify a careful,
in-depth planning and preparation. The ALICE Data Challenge is a very important
step of this development process where simulated detector data is moved from
dummy data sources up to the recording media using processing elements and
data-paths as realistic as possible. We will review herein the current status
of past, present and future ALICE Data Challenges, with particular reference to
the sessions held in 2002 when - for the first time - streams worth one week of
ALICE data were recorded onto tape media at sustained rates exceeding 300 MB/s.Comment: Talk from the 2003 Computing in High Energy and Nuclear Physics
(CHEP03), La Jolla, Ca, USA, March 2003, 9 pages, PDF. PSN MOGT00
Effective Rheology of Bubbles Moving in a Capillary Tube
We calculate the average volumetric flux versus pressure drop of bubbles
moving in a single capillary tube with varying diameter, finding a square-root
relation from mapping the flow equations onto that of a driven overdamped
pendulum. The calculation is based on a derivation of the equation of motion of
a bubble train from considering the capillary forces and the entropy production
associated with the viscous flow. We also calculate the configurational
probability of the positions of the bubbles.Comment: 4 pages, 1 figur
Modelling and Operational Effectiveness Evaluation for Integrated Gun and Missile Anti-aircraft System
弹炮结合防空武器系统是随着空袭与反空袭防空作战发展而产生的一种综合防空武器系统,是防空作战武器装备体系的重要组成部分。该系统由中低空地对空导弹和小口径高炮两种防空武器按一定的结合方式组合而成,二者组合可以发挥导弹中高空毁伤率高、高炮低空火力猛、抗干扰能力强等优势,能够在防空作战时取得更好的作战效果。 对防空武器系统的发展论证需要采用定性分析与定量分析相结合的科学方法,寻找防空武器系统作战能力的差距,分析影响防空武器系统效能的关键因素,进而研究防空武器装备建设重点和发展方向及作战使用原则。弹炮结合防空武器系统的研究包括很多方面,本文主要研究弹炮结合防空武器系统的作战模型和效能评估技术。论文分析...With the development of modern air raid and anti-air raid in warfare,integrated anti-aircrafts gun and missile system,as one of important components of air defence equipment system,has become a comprehensive air defence weapon system. This system is made up of two air-defence weapons: mid-low air space from earth to air missile, and small-diameter gun. And these two weapons are integrated in speci...学位:工学硕士院系专业:信息科学与技术学院自动化系_系统工程学号:20033102
Results on cascade production in lead-lead interactions from the NA57 experiment
The NA57 experiment has been designed to study the production of strange and multi-strange particles in Pb-Pb and p-Be collisions at the CERN SPS. The predecessor experiment WA97 has measured an enhanced abundance of strange particles in Pb-Pb collisions relative to p-A reactions at 160 GeV/c per nucleon beam momentum. NA57 has extended the WA97 measurements to investigate the evolution of the strangeness enhancement pattern as a function of the beam energy and over a wider centrality range. In this paper, we report results on cascade production for about the 60% most central collisions at 160 GeV/c per nucleon
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