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Search Results: 1 - 10 of 120558 matches for " Anton Vengu t "
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The natural occurrence of toxigenic moulds and mycotoxins in Slovenian primary grain production
Breda Jakovac-Strajn, Anton Vengu t, Igor Uj i -Vrhovnik, Katarina Pav i -Vrta , Gabrijela Tav ar-Kalcher
Acta agriculturae Slovenica , 2010, DOI: 10.2478/v10014-010-0008-y
Abstract: The aim of the present study was to determine the contamination of grains, grown in Slovenia and used for animal diets by Slovene farmers in year 2009. A total of 66 samples was examined on toxigenic moulds from genera Fusarium, Penicillium, Aspergillus, Alternaria and on 8 different mycotoxins. The leading contaminants among moulds were from Fusarium spp., detected in 51 samples, mostly in barley (19). The average number of Fusarium spp. colony forming units (cfu) in different grains was from 5.5-23.3 × 103/g, whereas the contamination of barley with Penicillium, Aspergillus and Alternaria spp. was 4.5, 19.3 and 5 × 103 cfu/g. Using liquid (HPLC) and gas chromatography (GC) methods, the presence of various mycotoxins (expressed for 12% of moisture content) was proved in 57.6% of all samples; mostly deoxynivalenol (DON, 54.5%) in concentrations of 130-2860 μg/kg, followed by zearalenone (ZON, 15.1%, 70-800 μg/kg), fumonisin B1 (3%, 120-210 μg/kg), while fumonisin B2, ochratoxin A, diacetoxyscirpenol (DAS), HT-2 and T-2 toxins were not detected. The results indicate that further control of toxigenic moulds and mycotoxins in Slovenian primary grain production is thus required and justified.
Response to "Anxious Academics: Mission Drift and Sliding Standards in the Modern Canadian University"
James C?té,Anton Allahar
The Canadian Journal of Sociology , 2008,
Proiectarea lucr rilor de sus inere a excava iilor prin metode semi-empirice
C?t?lin C?praru,Anton Chiric?
Urbanism. Arhitectura. Constructii , 2012,
Abstract: The main objective for deep excavations is to ensure the overall stability of the retaining system and to limit the displacements of the neighbouring buildings and utilities. This can be achieved by designing a proper support system. The paper resumes the main issues arising in the design process of the retaining works and it describes several methods for estimating the apparent earth pressure diagrams which were proposed by different authors during the 20th century, for the semi-empirical design of retaining structure.
esponse to James C té and Anton Allahar and Reply
Joseph Galbo,James C?té,Anton Allahar
The Canadian Journal of Sociology , 2008,
Memory effects in chaotic advection of inertial particles
Anton Daitche,Tamás Tél
Physics , 2014, DOI: 10.1088/1367-2630/16/7/073008
Abstract: A systematic investigation of the effect of the history force on particle advection is carried out for both heavy and light particles. General relations are given to identify parameter regions where the history force is expected to be comparable with the Stokes drag. As an illustrative example, a paradigmatic two-dimensional flow, the von K\'arm\'an flow is taken. For small (but not extremely small) particles all investigated dynamical properties turn out to heavily depend on the presence of memory when compared to the memoryless case: the history force generates a rather non-trivial dynamics that appears to weaken (but not to suppress) inertial effects, it enhances the overall contribution of viscosity. We explore the parameter space spanned by the particle size and the density ratio, and find a weaker tendency for accumulation in attractors and for caustics formation. The Lyapunov exponent of transients becomes larger with memory. Periodic attractors are found to have a very slow, $t^{-1/2}$ type convergence towards the asymptotic form. We find that the concept of snapshot attractors is useful to understand this slow convergence: an ensemble of particles converges exponentially fast towards a snapshot attractor, which undergoes a slow shift for long times.
Merging Effluent Discharge Plumes from Multiport Diffusers on a Sloping Beach  [PDF]
Anton Purnama
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.31004
Abstract: Multiport diffusers are the effective engineering devices installed at the marine outfall systems for the steady discharge of effluent streams from the modern coastal plants, such as municipal sewage treatment, power generation and seawater desalination. A far field mathematical model using a two-dimensional advection-diffusion equation is presented for continuous discharges of effluent streams from multiple outfalls on a uniformly sloping beach with a current parallel to the shoreline. The analytical solutions are illustrated graphically to replicate and capture the merging process of effluent plumes in shallow coastal waters, and then asymptotic approximation will be made to the maximum shoreline’s concentration to formulate effluent discharge plume dilution from a multiport diffuser.
Effluent Discharges from Two Outfalls on a Sloping Beach  [PDF]
Anton Purnama
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.519295
Abstract: A marine outfall is a long pipeline that continuously discharges large amounts of effluent streams into the sea. As the number of marine outfalls along the coastal areas is growing, a far field mathematical model with two point sources on a sloping beach is used to assess the coastal water quality following discharges from two outfalls. Asymptotic approximation will be made to the concentration at the beach to measure how well the effluent plumes are mixed and diluted in the coastal waters. The result found agrees with the engineering practice of installing a two-port diffuser at the end of a single outfall to minimize its potential environment impacts.
The Calculation of Stress-Strain State of Anisotropic Composite Finite-Element Area with Different Boundary Conditions on the Surface  [PDF]
Bergulyov Anton
World Journal of Mechanics (WJM) , 2014, DOI: 10.4236/wjm.2014.41004

The numerical analytic research approach of stress-strain state of anisotropic composite finite element area with different boundary conditions on the surface, is represented below. The problem is solved by using a spatial model of the elasticity theory. Differential equation system in partial derivatives reduces to one-dimensional problem using spline collocation method in two coordinate directions. Boundary problem for the system of ordinary higher-order differential equation is solved by using the stable numerical technique of discrete orthogonalization.

Membrane Interaction of Bound Ligands Contributes to the Negative Binding Cooperativity of the EGF Receptor
Anton Arkhipov,Yibing Shan ,Eric T. Kim,David E. Shaw
PLOS Computational Biology , 2014, DOI: doi/10.1371/journal.pcbi.1003742
Abstract: The epidermal growth factor receptor (EGFR) plays a key role in regulating cell proliferation, migration, and differentiation, and aberrant EGFR signaling is implicated in a variety of cancers. EGFR signaling is triggered by extracellular ligand binding, which promotes EGFR dimerization and activation. Ligand-binding measurements are consistent with a negatively cooperative model in which the ligand-binding affinity at either binding site in an EGFR dimer is weaker when the other site is occupied by a ligand. This cooperativity is widely believed to be central to the effects of ligand concentration on EGFR-mediated intracellular signaling. Although the extracellular portion of the human EGFR dimer has been resolved crystallographically, the crystal structures do not reveal the structural origin of this negative cooperativity, which has remained unclear. Here we report the results of molecular dynamics simulations suggesting that asymmetrical interactions of the two binding sites with the membrane may be responsible (perhaps along with other factors) for this negative cooperativity. In particular, in our simulations the extracellular domains of an EGFR dimer spontaneously lay down on the membrane in an orientation in which favorable membrane contacts were made with one of the bound ligands, but could not be made with the other. Similar interactions were observed when EGFR was glycosylated, as it is in vivo.
Elasticity and Response in Nearly Isostatic Periodic Lattices
Anton Souslov,Andrea J. Liu,T. C. Lubensky
Physics , 2009, DOI: 10.1103/PhysRevLett.103.205503
Abstract: The square and kagome lattices with nearest neighbor springs of spring constant $k$ are isostatic with a number of zero-frequency modes that scale with their perimeter. We analytically study the approach to this isostatic limit as the spring constant $k'$ for next-nearest-neighbor bonds vanishes. We identify a characteristic frequency $\omega^* \sim \sqrt{k'}$ and length $l^* \sim \sqrt{k/k'}$ for both lattices. The shear modulus $C_{44}= k'$ of the square lattice vanishes with $k'$, but that for the kagome lattice does not.
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