1. Different Higgs models and the number of Higgs particlesLeila Marek-Crnjac, 2006, izvirni znanstveni članek Opis: In this short paper we discuss some interesting Higgs models. It is concluded that the most likely scheme for the Higgs particles consists of five physical Higgs particles. These are two charged H▫$^+$▫, H▫$^-$▫ and three neutrals ▫$h^0$▫, H▫$^0$▫, A▫$^0$▫. Further more the most probably total number of elementary particles for each model is calculated [El Naschie MS. Experimental and theoretical arguments for the number of the mass of the Higgs particles. Chaos, Solitons & Fractals 2005;23:1091-8; El Naschie MS. Determining the mass of the Higgs and the electroweak bosons. Chaos, Solitons & Fractals 2005;24:899-905; El Naschie MS.On 366 kissing spheres in 10 dimensions, 528 P-Brane states in 11 dimensions and the 60 elementary particles of the standard model. Chaos, Solitons & Fractals 2005;24:447-57]. Ključne besede: mathematics, Higgs models, Higgs particles, Riemann tensor, Killing vector, minimal super symmetric standard model Objavljeno: 30.05.2012; Ogledov: 755; Prenosov: 11 Celotno besedilo (0,00 KB) |
2. Influence of temperature and pressure during PGSS[sup]TM micronization and storage time on degree of crystallinity and crystal forms of monostearate and tristearateZoran Mandžuka, Željko Knez, 2008, izvirni znanstveni članek Opis: For controlling the degree of crystallinity and crystal form during particle formation using supercritical fluids, knowledge of pressure influence on solid-liquid-gas (S-L-G) equilibrium and solubility data of the system is crucial. S-L-G equilibrium data were determined in pressure range from 50 to 600 bar for systems monostearate/CO2 and tristearate/CO2 using a high-pressure view cell. Results showed a temperature minimum for both systems.The solubilities of CO2 in liquid glycerides were high: maximum solubilities, which were determined at temperatures 70 and 90 °C and pressure range from 50 to 450 bar, were from 50 to 90 mol%. Physical characteristics of micronized monostearate and tristearate samples were studied in detail after micronization and after 3 months of storage at 20 °C. Ključne besede: chemical processing, high pressure technology, supercritical fluids, micronization, fine particles, Particles from Gas Saturated Solution, degree of crystallinity Objavljeno: 31.05.2012; Ogledov: 892; Prenosov: 14 Celotno besedilo (0,00 KB) |
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5. Lie groups hierarchy in connection with the derivation of the inverse electromagnetic fine structure constant from the number of particle-like states 548, 576 and 672Leila Marek-Crnjac, 2008, izvirni znanstveni članek Opis: In this work we present different mathematical derivations of the inverse electromagnetic fine structure constant from the dimension of the compactified Klein modular curve, the dimension of the exceptional Lie group E8 E8 and from the number of states 548, 576 and 672. We show the close connection of the number of particle-like states 548, 576 and 672 with the dimensions of Lie groups, specially with E71/2 and other exceptional Lie groups. Ključne besede: Lie groups, Klein-modular curve, particles Objavljeno: 31.05.2012; Ogledov: 608; Prenosov: 4 Celotno besedilo (0,00 KB) |
6. Magnetic particle separation in viscous flows by BEMMatjaž Hriberšek, Jure Ravnik, Primož Kocutar, 2011, objavljeni znanstveni prispevek na konferenci Opis: A boundary element method based solver for particle motion simulation in dilute suspensions under the influence of hydrodynamic and magnetic forces was applied. The Euler-Lagrangian formulation for simulation of dilute two-phase flow was applied. The algorithm solves the incompressible Navier-Stokes equations written in velocity-vorticity formulation. The non uniform magnetic field was defined analytically for the case of a set of long thin wires. The particle trajectories were computed by applying the 4th order Runge-Kutta method. The computed test case consisted of a narrow channel under the influence of a nonuniform magnetic field, where magnetite and aluminium particles were suspended in water. The results of computations show the distributions of particles along the channel and confirms the suitability of the proposed configuration as a separation device under ideal conditions. Ključne besede: boundary element method, laminar flow, magnetic particles, viscous fluids Objavljeno: 01.06.2012; Ogledov: 849; Prenosov: 5 Celotno besedilo (0,00 KB) |
7. Gold in the past, today and futureRebeka Rudolf, Maša Anžel, Evgenija Marković, Miodrag Čolić, Dragoslav Stamenković, 2012, pregledni znanstveni članek Opis: This paper deals with gold, which is described as a chemical element. Special attention is paid to its physical-chemical properties and, furthermore, where or in what form it can be found in nature. We discuss the role it has played through history and we inform how gold has been developed to the level it has reached today's value. Still more, when gold is broken into nanoparticles, this form could be highly useful for a wide range of processes, including general nanotechnology, electronics manufacturing and the synthesizing of different functional materials. It is important that we know that gold is also used in industry in many engineering applications (contacts in micro-electronics) and medicine (dental alloys, implants). Ključne besede: gold, physical-chemical properties, nano-particles, applications Objavljeno: 01.06.2012; Ogledov: 741; Prenosov: 15 Celotno besedilo (144,60 KB) |
8. Binding silver nano-particles onto viscose non-woven using different commercial sol-gel proceduresTanja Pivec, Zdenka Peršin, Silvo Hribernik, Tina Maver, Mitja Kolar, Karin Stana-Kleinschek, 2012, izvirni znanstveni članek Opis: The paper presents possible solution of Ag binding using commercial sol-gel systems which enable its low release into a wound, providing a good antimicrobial effect on those bacterial cultures that are most likely present in the wound. The influence of different sol-gel systems on the hydrophilic properties of carrier materials and the level of released silver has been studied. The results showed that sol-gel as binding-systems could provide proper hydrophilic properties of material, whilst binding silver strongly enough providing at the same time excellent antimicrobial activity of the treated viscose meterials. Ključne besede: silver nano-particles, sol-gel, viscose non-woven, silver release, hydrophilicity, antimicrobial properties Objavljeno: 01.06.2012; Ogledov: 1026; Prenosov: 6 Celotno besedilo (235,88 KB) |
9. Multifunctional composites by high-pressure spray processesEckhard Weidner, Marcus Petermann, Željko Knez, 2003, pregledni znanstveni članek Opis: A series of spraying processes designed to generate powders and composites using supercritical fluids have been proposed in the past 15 years. In this review, thermo- and fluid-dynamic aspects and engineering principles are discussed and advantages of such technologies are demonstrated. These new techniques display convincing advantages, producing competitive high-quality products with tailor-made properties. Initial industrial applications have been achieved in the production of food products and fine-chemicals. Ključne besede: chemical processing, high pressure technology, micronization, supercritical fluids, particles, powder generation, thermodynamics, fluid dynamics, PGSS Objavljeno: 01.06.2012; Ogledov: 1093; Prenosov: 3 Celotno besedilo (0,00 KB) |
10. Particles formation and particle design using supercritical fluidsŽeljko Knez, Eckhard Weidner, 2003, pregledni znanstveni članek Opis: Major recent advances. Particle formation and design of solid particles and powdery composites with unique properties is at the moment a major developmentof supercritical fluids (synonymsČ dense gasses, dense fluids, highpressure) applications. This review will focus on recent advances and on fundamentals of these processes and their applications. Ključne besede: chemical processing, high pressure technology, micronization, supercritical fluids, micro-particles, nano-particles, powder generation, crystallization, particles from gas saturated solutions Objavljeno: 01.06.2012; Ogledov: 1354; Prenosov: 11 Celotno besedilo (0,00 KB) |