Sandra Kay a kluci

Sandra Kay a kluci
Home Ersta Sköndal University College Department of Social Work Sandra Kaya
Ersta Sköndal University College · Department of Social Work
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We investigate the phase structure of lattice QCD for the general number of flavors in the parameter space of gauge coupling constant and quark mass, employing the one-plaquette gauge action and the standard Wilson quark action. Performing a series of simulations for the number of flavors $N_F=6$--360 with degenerate-mass quarks, we find that when...
Since the discovery of Na/K-ATPase, evidence has accumulated to suggest that 1 mol of ATP hydrolysis occurs via the Na+-occluded ADP-sensitive phosphoenzyme, the K+-sensitive phosphoenzyme and the K+-occluded enzyme accompanying active transport of 3Na+ and 2K+ according the Post-Albers scheme. However, some controversial issues have arisen concern...
H/K-ATPase preparations (the G1 membrane) from pig stomach contain both kinases and phosphatases and show reversible phosphorylation of Tyr(7), Tyr(10), and Ser(27) residues of the alpha-chain of H/K-ATPase. The Tyr-kinase is sensitive to genistein and quercetin and recognized by anti-c-Src antibody. The Ser-kinase is dependent on Ca(2)(+) (K(0.5)...
H/K-ATPase preparations (the G1 membrane) from pig stomach contain both kinases and phosphatases and show reversible phosphorylation of Tyr⁷, Tyr¹⁰, and Ser²⁷ residues of the α-chain of H/K-ATPase. The Tyr-kinase is sensitive to genistein and quercetin and recognized by anti-c-Src antibody. The Ser-kinase is dependent on Ca²⁺ (K0.5 = 0.9 μM), sensi...
We study the nature of the QCD vacuum at general number of flavors $N_F$ by numerical simulations on the lattice. Combining the results with those of the perturbation theory, we propose the following picture: 1) For $N_F \ge 17$, there exists only one IR fixed point at vanishing gauge coupling, i.e., the theory in the continuum limit is trivial. 2)...
We report results on semileptonic B -> pilvoverline decay form factors near q2max using NRQCD heavy quark and clover light quark actions and currents improved through O(alphaa). An inconsistency with the soft pion relation f0 (q2max) = fB/fpi. found in a previous work is confirmed, and a possible solution with nonperturbative renormalization is dis...
We report results on semileptonic B --> pi l<(nu)over bar> decay form factors near q(max)(2) using NRQCD heavy quark and clover light quark actions and currents improved through O(alpha a). An inconsistency with the soft pion relation f(0)(q(max)(2)) = f(B)/f(pi) found in a previous work is confirmed, and a possible solution with nonperturbative re...
We report results on semileptonic $B\to\pi l\bar{\nu}$ decay form factors near $q^2_{\rm max}$ using NRQCD heavy quark and clover light quark actions and currents improved through $O(\alpha a)$. An inconsistency with the soft pion relation $f^0(q^2_{\rm max})= f_B/f_{\pi}$ found in a previous work is confirmed, and a possible solution with nonpertu...
We present results for I=2 pion scattering length with the Wilson fermions in
the quenched approximation. The finite size method presented by L\"uscher is
employed, and calculations are carried out at $\beta=5.9$, 6.1, and 6.3. In the
continuum limit, we obtain a result in reasonable agreement with the
experimental value.
We present a non-perturbative calculation for the pion decay constant with
quenched Kogut-Susskind quarks. Numerical simulations are carried out at $\beta
= 6.0$ and 6.2 with various operators extending over all flavors. The
renormalization correction is applied for each flavor by computing
non-perturbative renormalization constants, and it is comp...
We present a study for the pion decay constant $f_\pi$ in the quenched approximation to lattice QCD with the Kogut-Susskind (KS) quark action, with the emphasis given to the renormalization problems. Numerical simulations are carried out at the couplings $\beta = 6.0$ and 6.2 on $32^3\times 64$ and $48^3\times 64$ lattices, respectively. The pion d...
The Na/K-ATPase has been shown to bind 1 and 0.5 mol of 32P/mol of α-chain in the presence [γ-32P]ATP and [α-32P]ATP, respectively, accompanied by a maximum accumulation of 0.5 mol of ADP-sensitive phosphoenzyme (NaE1P) and potassium-sensitive phosphoenzyme (E2P). The former accumulation was followed by the slow constant liberation of Pi, but the l...
We present a model-independent calculation of hadron matrix elements for all dimension-six operators associated with baryon number violating processes using lattice QCD. The calculation is performed with the Wilson quark action in the quenched approximation at $\beta=6/g^2=6.0$ on a $28^2\times 48\times 80$ lattice. Our results cover all the matrix...
We present preliminary results of a new lattice computation of hadronic
matrix elements of baryon number violating operators which appear in the
low-energy effective Lagrangian of (SUSY-)Grand Unified Theories. The
contribution of irrelevant form factor which has caused an underestimate of the
matrix elements in previous studies is subtracted in th...
Since the discovery of Na/K-ATPase by Skou, the mechanism of Na/K-dependent ATP hydrolysis and Na and K transport has been extensively studied. The hydrolysis appears to occur sequentially via the Na-Enzyme-ATP complex (NaE1ATP), ADP-sensitive phosphoenzyme (NaE1P), the K-sensitive phosphoenzyme (E2P) and the K-occluded enzyme (KE2), known the Post...
In vivo reversible phosphorylation of Tyr-7 and Tyr-10 of the pig stomach H/K-ATPase α-chain was initially demonstrated in mammals,
rat, rabbit, and pig, in the presence of vanadate+H2O2. In vitro phosphorylation has also been unequivocally demonstrated
via the use of protease inhibitors during membrane H/K-ATPase preparation. An amphoretic deterge...
We present a lattice NRQCD study of the B meson decay constant in the quenched approximation with emphasis given to the scaling behavior. The NRQCD action and the heavy-light axial current we use include all terms of order 1/M and the perturbative $O(\alpha_s a)$ and $O(\alpha_s/M)$ corrections. Using simulations at three value of couplings $\beta$...
We report results of quark masses in quenched lattice QCD with the Kogut-Susskind fermion action, employing the regularization independent scheme of Martinelli et al. to nonperturbatively evaluate the renormalization factor relating the bare quark mass on the lattice to that in the continuum. Calculations are carried out at β = 6.0, 6.2, and 6.4, f...
We investigate the scaling behavior of the B meson decay constant f(B) and f(Bs), at beta=5.7, 5.9, 6.1, employing the NRQCD heavy quark action and the clover light quark action. Mixing effect from dimension-4 operator in the heavy-light axial-vector current is studied, and we find that the a dependence of f(B) is significantly reduced. Our prelimi...
Pig and dog kidney Na+,K+-ATPase preparations, irrespective of specific activity, showed ∼0.5 mol of maximum phosphorylation/mol α-chain for ATP or
acetyl phosphate (AcP) at steady state conditions. Pyridoxal 5′-diphospho-5′-adenosine (AP2PL)-treated pig kidney enzymes containing ∼0.5 mol of AP2PL probe at Lys-480/mol (Tsuda, T., Kaya, S., Funatsu,...
The addition of ATP to Mg2+-Na+-bound-probe labeled Na+,K+-ATPase preparations containing approximately 0.5 mol of pyridoxal 5'-diphospho-5'-adenosine (AP2PL) probe at Lys-480 and approximately 0.9 mol of fluorescein 5'-isothiocyanate (FITC) probe at Lys-501 showed a decrease and an increase in the AP2PL fluorescence intensity with neither signific...
We report preliminary results of our study of matrix elements of baryon number violating operators which appear in the low-energy effective Lagrangian of (SUSY-)Grand Unified Theories. The calculation is performed on a $32^{3}\times80$ lattice at $\beta=6.1$ using Wilson fermions in the quenched approximation. Our calculation is independent of deta...
We report on a study of the finite-temperature chiral transition on an Nt = 4 lattice for 2 + 1 flavors of Kogut-Susskind quarks. We find the point of physical quark masses to lie in the region of crossover, in agreement with results of previous studies. Results of a detailed examination of the mu,d = ms case indicate vanishing of the screening mas...
Light quark masses are computed for Kogut-Susskind fermions by evaluating non-perturbatively the renormalization factor for bilinear quark operators. Calculations are carried out in the quenched approximation at β = 6.0, 6.2, and 6.4. For the average up and down quark mass we find m(2GeV) = 4.15(27)MeV in the continuum limit, which is significantly...
We investigate the phase structure of lattice QCD for general number of flavors $N_F$. Based on numerical data combined with the results of the perturbation theory we propose the following picture: When $N_F \ge 17$, there is only one IR fixed point at vanishing gauge coupling, i.e., the theory in the continuum limit is trivial. On the other hand,...
We investigate the finite-temperature phase structure and the scaling of the chiral condensate in lattice QCD with two degenerate light quarks, using a renormalization group improved gauge action and the Wilson quark action. We obtain a phase diagram which is consistent with that from the parity-flavor breaking scenario. The scaling relation for th...
Previously H,K ATPase preparations from pig stomach were shown to contain intrinsic protein kinase activities which phosphorylated specific tyrosine and serine residues in the N-terminal of the alpha-chain of H,K ATPase (Togawa et al. 1996). In the present investigation, pig H,K ATPase-containing membrane preparations were compared with rat prepara...
The modification of Na+, K+-ATPase with increasing pyridoxal 5'-diphospho-5'-adenosine (AP2PL) concentrations resulted in saturation of the ∼0.5 mol AP2PL probe incorporation into the Lys-480/mol catalytic α-chain and reduced the Na+, K+-ATPase activity to around half without affecting the phosphorylation by acetyl phosphate (AcP), and led to incre...
H+,K+-ATPase preparations from pig stomach were modified with a sulfhydryl fluorescence reagent, N-[p-(2-benzimidazolyl)phenyl] maleimide (BIPM). The addition of ATP to the modified enzyme preparations in the presence of Mg2+ decreased the BIPM fluorescence but increased the Trp fluorescence. After exhaustion of ATP, the fluorescence intensities in...
The nature of finite temperature transitions in lattice QCD with Wilson quarks is studied near the chiral limit for the cases of 2, 3, and 6 flavors of degenerate quarks ($N_F=2$, 3, and 6) and also for the case of massless up and down quarks and a light strange quark ($N_F=2+1$). Our simulations mainly performed on lattices with the temporal direc...
When pig stomach membrane H,K-ATPase preparations were incubated with 32ATP, Mg2+ and Ca2+, reversible phosphorylation of specific Tyr and Ser residues in the N-terminal a-chain of H,K-ATPase occurred without any detectable phosphorylation in other regions of the chain. Amino acid sequence analysis of purified peptides and others showed a sequentia...
The finite temperature transition of QCD with two degenerate light quarks is studied on the lattice with a renormalization group improved gauge action and the Wilson quark action. We have made simulations on an $8^3\times 4$ lattice near the chiral transition point. It is shown that the chiral condensate which is the order parameter of chiral symme...
We investigate and elucidate the phase structure of QCD for general number of flavors NF with Wilson quarks, varying NF from 2 up to 300. Based on numerical results combined with the result of the perturbation theory we propose the following picture: When NF ≥ 17, there is only a trivial fixed point and therefore the theory in the continuum limit i...
Finite temperature transition in lattice QCD with degenerate Wilson quarks is investigated on an Nt = 4 lattice, using a renormalization group improved gauge action. We find the following for the NF = 2 case: 1) The transition is smooth for a wide range of the quark mass. 2) The chiral transition is continuous. 3) The chiral condensation well satis...
When pig stomach membrane H+,K(+)-ATPase preparations were incubated with [gamma-32P]ATP and Mg2+ with vanadate, 32P was incorporated into the alpha-chain of H+,K(+)-ATPase to a steady-state level of approximately 0.7 mol of phosphotyrosine (Tyr(P))/mol of phosphoenzyme intermediates. The addition of a membrane H+,K(+)-ATPase preparation with Mg2+...
The nature of QCD phase transition is studied with massless up and down quarks and a light strange quark, using the Wilson formalism for quarks on a lattice with the temporal direction extensionN
t=4. We find that the phase transition is of first order for the physical strange quark mass.
By Monte Carlo simulation we study the critical exponents governing the transition of the three-dimensional classical O(4) Heisenberg model, which is considered to be in the same universality class as the finite-temperature QCD with massless two flavors. We use the single cluster algorithm and the histogram reweighting technique to obtain observabl...
The finite temperature transition in QCD is studied using Wilson quarks for the cases of $N_F=2$, 3 and 2+1. For $N_F=2$ the transition is smooth in the chiral limit on both $\nt=4$ and 6 lattices. For $N_F=3$, clear two state signals are observed for $\beta\leq4.7$ on $8^2\times10 \times4$ and $12^3\times4$ lattices, which implies the transition i...
The Lys-480 in the alpha-subunits of Na+,K(+)-ATPase from pig kidneys was specifically modified with pyridoxal 5'-phosphate (PLP) or pyridoxal 5'-diphospho-5'-adenosine (AP2PL) probes in the presence of NaCl. The site was shown to be the same as the ATP-protectable binding of these probes (Hinz, H.R., and Kirley, T.L. (1990) J. Biol. Chem. 265, 102...
The hydrolysis of ATP by Na+/K+-ATPase is accompanied by conformational changes of the enzyme. Several conformational states of the enzyme have been characterized with intrinsic and extrinsic fluorescence probes (2–4,8–12). Pyridoxal-5’-phosphate (PIP) or its analogue, adenosine diphosphopyridoxal (AP2PL) have been used to probe the ultrastructure...
Na+/K+-ATPase can hydrolyze some phosphatase substrates such as acetyl phosphate (AcP), p-nitrophenylphosphate (pNPP), and carbamylphosphate (CarbP) in the presence of Mg2+ and K+. When K+ is replaced with Na+, AcP is known to induce conformational changes and accumulate E1P and E2P in the presence of 2 M and 16 mM Na+, respectively (1,5,7,8). It w...
We report results on semileptonic B ---> pilepton anti-neutrino decay form factors near qmax[2] using NRQCD heavy quark and clover light quark actions and currents improved through O(αa). An inconsistency with the soft pion relation f[0] (qmax[2] = fB / fπ found in a previous work is confirmed, and a possible solution with nonperturbative renormali...
Department of Social Work Stockholm, Sweden
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» Galerie Sandras » Mozaika » Pozvánky » Blog » Kontakt. Předchozí obrázek | Zpět do Galerie | Následující obrázek >> Ahoj holky a kluci 08. 03. 2008, 21:56:00, zobrazeno: 6213x, rozlišení: 700x509px, velikost: 139 KB, sekce: Donova galerie. Tak jsem slyšel, že už plníte třetí úkol a že hezky kreslíte a píšete příběhy. To já neumím :-(, ale až se bude ...
2. Aug. 2021 At 1:45, Kay watched as Sandra disappeared through the double doors of the operating room . Surgery did not begin until 4:45 a .m . and was expected to take approximately four hours . Surgery did not begin until 4:45 a .m . and was expected to take approximately four hours .
Sandra KAYA | Cited by 1,085 | of Ersta Sköndal University College, Stockholm | Read 50 publications | Contact Sandra KAYA
Sandra I Kay . Applied Cognitive Psychology and Cognitive Psychology. Download ...
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» Galerie Sandras » Mozaika » Pozvánky » Blog » Kontakt. Předchozí obrázek | Zpět do Galerie | Následující obrázek >> Ahoj holky a kluci 08. 03. 2008, 21:56:00, zobrazeno: 6213x, rozlišení: 700x509px, velikost: 139 KB, sekce: Donova galerie. Tak jsem slyšel, že už plníte třetí úkol a že hezky kreslíte a píšete příběhy. To já neumím :-(, ale až se bude ...
2. Aug. 2021 At 1:45, Kay watched as Sandra disappeared through the double doors of the operating room . Surgery did not begin until 4:45 a .m . and was expected to take approximately four hours . Surgery did not begin until 4:45 a .m . and was expected to take approximately four hours .
Sandra KAYA | Cited by 1,085 | of Ersta Sköndal University College, Stockholm | Read 50 publications | Contact Sandra KAYA
Sandra I Kay . Applied Cognitive Psychology and Cognitive Psychology. Download ...
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