The curvature of the QCD phase transition line

We determine the curvature of the phase transition line in the mu-T plane through an analysis of various observables, including the Polyakov loop, the quark number susceptibilities and the susceptibility of the chiral condensate. The second derivative of these quantities with respect to mu was calculated. The measurements were carried out on N_T = 4,6,8 and 10 lattices generated with a Symanzik improved gauge and stout-link improved 2+1 flavour staggered fermion action using physical quark masses.Comment: Talk presented at the XXVI International Symposium on Lattice Field Theory, July 14 - 19, 2008, Williamsburg, Virginia, USA. 7 pages, 6 figure

Az alacsony alkalikusfoszfatáz-aktivitás klinikai értékelése és differenciáldiagnosztikája

Laboratory diagnostics is especially important in the diagnosis of certain diseases. We compared manual measurements results to laboratory normal values. In some cases, these values depend on the gender and age as well. In the case of alkaline phosphatase, it is rarely considered that reference values change over life periods. Unfortunately, during the daily practice we do not always take into account of the changes with aging. This is especially true if the laboratory does not specify the age related normal values. Another problem that we mostly focus on the results exceeding the normal values, and do not pay enough attention to the low values. Of course, these results should be put in the context of the clinical picture and other diagnostic test results. We would like to draw attention to the measuring of alkaline phosphatase and the differential diagnosis for low serum activity. Orv Hetil. 2017; 158(26): 1003-1007

Topology with Dynamical Overlap Fermions

We perform dynamical QCD simulations with $n_f=2$ overlap fermions by hybrid Monte-Carlo method on $6^4$ to $8^3\times 16$ lattices. We study the problem of topological sector changing. A new method is proposed which works without topological sector changes. We use this new method to determine the topological susceptibility at various quark masses.Comment: 15 pages, 3 figure

The QCD equation of state at nonzero densities: lattice result

In this letter we give the equation of state of QCD at finite temperatures and densities. The recently proposed overlap improving multi-parameter reweighting technique is used to determine observables at nonvanishing chemical potentials. Our results are obtained by studying n_f=2+1 dynamical staggered quarks with semi-realistic masses on N_t=4 lattices.Comment: 5 pages, 6 figure

Static QˉQ\bar{Q}Q pair free energy and screening masses from correlators of Polyakov loops: continuum extrapolated lattice results at the QCD physical point

We study the correlators of Polyakov loops, and the corresponding gauge invariant free energy of a static quark-antiquark pair in 2+1 flavor QCD at finite temperature. Our simulations were carried out on $N_t$ = 6, 8, 10, 12, 16 lattices using Symanzik improved gauge action and a stout improved staggered action with physical quark masses. The free energies calculated from the Polyakov loop correlators are extrapolated to the continuum limit. For the free energies we use a two step renormalization procedure that only uses data at finite temperature. We also measure correlators with definite Euclidean time reversal and charge conjugation symmetry to extract two different screening masses, one in the magnetic, and one in the electric sector, to distinguish two different correlation lengths in the full Polyakov loop correlator

A módosított, a mátrixhoz kötött és intakt mikotoxinok egységes fogalomrendszere és a mátrixhoz kötött mikotoxinok alternatív meghatározása

Az egészséges szervezet a mikotoxinok jelentős részét képes átalakítani. Néhány mikotoxin eredeti kémiai formája megváltozhat a máj xenobiotikum-transzfor- máló enzimrendszere, ill. az intestinalis mikrobiota által, de már keletkezésük helyén, a növényi szervezetben vagy akár a penészgomba által is átalakulhatnak. Ezen túlmenően a legkülönfélébb kémiai hatások is szerepet játszhatnak az eredeti szerkezet megváltoztatásában. Ennek során a kiindulási molekulánál toxikusabb, biológiailag aktívabb vegyületek is keletkezhetnek. A rejtett (kötött) mikotoxinok kérdésköre viszonylag új keletű. A nem egyértelműen és következetesen használt fogalmak tisztázására 2014-ben új, szisztematikus definíciórendszert dolgoztak ki, amely szerint négy hierarchikus szintre osztották a mikotoxino- kat kialakulásuk szerint. Rövid áttekintésében a szerző ezt a fogalomrendszert ismerteti számos példával bemutatva, ill. egy alternatív módszert ismertet a mátrixhoz kötött mikotoxinok analízisének előkészítésére. SUMMARY The healthy organism is able to transform a relatively high proportion of mycotoxins. The original molecular form of some mycotoxins may be altered via the enzymatic xenobiotic transformation ability of the liver, or even by the intestinal microbiota, but in some instances as early as the site of production by the mould or in the host plant they may be transformed, as well. Moreover, divergent chemical effects may play a role in the modification of the original chemical form. Along this process, the emerging new molecules can be more toxic and biologically more active than the parent compound. The hidden (bound) mycotoxin theory is rather new. For the clarification of the erroneously and unequivocally used terminology in the year 2014, a new, systematic definition criterion has been worked out, in which mycotoxins are classified into four hierarchic levels, based on their formation. This mini review introduces this classification system with numerous examples and shows alternative method for the prepara- tion of samples before analysis of matrix associated mycotoxins

Acute hepatic effects of low-dose fumonisin b1 In rats

Adult male Wistar rats were enrolled in a study to test the acute hepatic effects of 50 mg/kg fumonisin B1 in feed for 5 days. Fumonisin B1 depressed growth and feed intake, and absolute and relative liver weight showed a significant increase. The proportions of C17:0, C18:3 n3, C22:5 n3 and C22:6 n3 fatty acids decreased in the hepatic phospholipid fraction. All proportional decreases modified the hepatocellular membrane lipids into a more rigid state. The fatty acid profile modifications were partly compensated for by endogenous glutathione (preventing the formation of conjugated dienes and trienes as initial phase lipid peroxidation indicators), while the enzymatic antioxidant defence system (glutathione peroxidase) was unaltered. In contrast, hepatic malondialdehyde, the cytotoxic product of end-phase lipid peroxidation showed a concentration increase even after 5 days of feeding. The results indicate a rather strong and rapid hepatic effect of FB1, immediately impairing membrane phospholipids, even before the enzymatic antioxidant defence is activated

The QCD transition temperature: results with physical masses in the continuum limit

The transition temperature ($T_c$) of QCD is determined by Symanzik improved gauge and stout-link improved staggered fermionic lattice simulations. We use physical masses both for the light quarks ($m_{ud}$) and for the strange quark ($m_s$). Four sets of lattice spacings ($N_t$=4,6,8 and 10) were used to carry out a continuum extrapolation. It turned out that only $N_t$=6,8 and 10 can be used for a controlled extrapolation, $N_t$=4 is out of the scaling region. Since the QCD transition is a non-singular cross-over there is no unique $T_c$. Thus, different observables lead to different numerical $T_c$ values even in the continuum and thermodynamic limit. The peak of the renormalized chiral susceptibility predicts $T_c$=151(3)(3) MeV, wheres $T_c$-s based on the strange quark number susceptibility and Polyakov loops result in 24(4) MeV and 25(4) MeV larger values, respectively. Another consequence of the cross-over is the non-vanishing width of the peaks even in the thermodynamic limit, which we also determine. These numbers are attempted to be the full result for the $T$$\neq$0 transition, though other lattice fermion formulations (e.g. Wilson) are needed to cross-check them.Comment: 13 pages 5 figures. Final version, published in Phys.Lett.

QCD finite T transition -- Comparison between Wilson and staggered results

A quantitative comparison between the finite temperature behaviour of the staggered and Wilson fermion formulations are performed. The comparison is based on a physical quantity that is expected to be quite sensitive to the fermionic features of the action. For that purpose we use the height of the peak for $d\chi_s/dT$, where $\chi_s$ is the quark number susceptibility.Comment: 6 pages. Talk presented at Lattice 200