Search results for "Dog"

Enhanced expression of haem oxygenase-1 by nitric oxide and antiinflammatory drugs in NIH 3T3 fibroblasts

2000

Haem oxygenase-1 (HO-1) can exert protective effects against oxidative stress and inflammation. Fibroblasts participate in inflammatory responses where they produce high levels of prostaglandins (PGs) and nitric oxide (NO). However, little is known of the presence of HO-1 in these cells and the possible interactions among these pathways. Incubation of cells with NO donors, spermine nonoate (SPNO) and S-nitroso-N-acetylpenicillamine (SNAP), induced a dose- and time-dependent expression of HO-1 protein. NO donors increased basal PGE2 release although they reduced PGE2 accumulated in the medium and cyclo-oxygenase (COX) activity when cells were stimulated with lipopolysaccharide (LPS). COX-2 p…

Der Einflu� von nat�rlichem und synthetischem Oxytocin auf endogene Kreatinin-Clearance, Salzausscheidung und S�ureausscheidungsf�higkeit der Ratte u…

1957

Der Einflu� von Adrenalektomie und Nebennierenrindenhormonen auf die renalen Clearancen von Inulin, p-Aminohippurat, echtem endogenen Kreatinin und H…

1959

Der Einflu� partieller Adrenalektomien auf Wasserdiurese und endogene Kreatinin-Clearance bei einseitig nephrektomierten Ratten

1959

Riflessioni sui rapporti fra dogmatica giuridica e storia del diritto nel pensiero di Philipp Lotmar

2014

Il contributo si occupa di indagare i rapporti fra storia del diritto e dogmatica giuridica nel pensiero di Philipp Lotmar alla luce delle osservazioni svolte nel suo libro intitolato "Kritische Studien in Sachen der Contravindication".

Signatures of superfluidity for Feshbach-resonant Fermi gases

2004

We consider atomic Fermi gases where Feshbach resonances can be used to continuously tune the system from weak to strong interaction regime, allowing to scan the whole BCS-BEC crossover. We show how a probing field transferring atoms out of the superfluid can be used to detect the onset of the superfluid transition in the high-$T_c$ and BCS regimes. The number of transferred atoms, as a function of the energy given by the probing field, peaks at the gap energy. The shape of the peak is asymmetric due to the single particle excitation gap. Since the excitation gap includes also a pseudogap contribution, the asymmetry alone is not a signature of superfluidity. Incoherent nature of the non-con…

Influence ofsp−dhybridization on the electronic structure of Al-Mn alloys

2008

The influence of $sp\text{\ensuremath{-}}d$ hybridization on the electronic structure of different Al-Mn alloys has been studied by photoelectron spectroscopy. Experimental evidence of a pseudogap in a crystalline binary Hume-Rothery alloy is provided. The pseudogap varies systematically with Mn concentration. The $sp\text{\ensuremath{-}}d$ hybridization alone, even in the absence of Hume-Rothery mechanism, can produce the pseudogap. Existence of the pseudogap, suppression of the $\mathrm{Mn}\phantom{\rule{0.2em}{0ex}}2p$ satellite, and decrease in the Doniach-\ifmmode \check{S}\else \v{S}\fi{}unji\ifmmode \acute{c}\else \'{c}\fi{} asymmetry parameter are the consequences of the $sp\text{\e…

Coulomb interaction in disordered metals and HTSC

2001

Abstract We consider underdoped or overdoped cuprates as disordered conductors. The diffusion coefficient D can be as low as 10 −5 m 2 s −1 . Under these conditions Coulomb interaction between electrons must be taken into account. The main effect is to open a dip in the density of state near the Fermi level. We show that this model explains most of the observed features of the so-called “pseudogap” in the normal state including its value, anisotropy and variation with doping. Such a model applied to disordered metals explains the dips observed in conductance measurements.

Momentum structure of the self-energy and its parametrization for the two-dimensional Hubbard model

2016

We compute the self-energy for the half-filled Hubbard model on a square lattice using lattice quantum Monte Carlo simulations and the dynamical vertex approximation. The self-energy is strongly momentum dependent, but it can be parametrized via the non-interacting energy-momentum dispersion $\varepsilon_{\mathbf{k}}$, except for pseudogap features right at the Fermi edge. That is, it can be written as $\Sigma(\varepsilon_{\mathbf{k}},\omega)$, with two energy-like parameters ($\varepsilon$, $\omega$) instead of three ($k_x$, $k_y$ and $\omega$). The self-energy has two rather broad and weakly dispersing high energy features and a sharp $\omega= \varepsilon_{\mathbf{k}}$ feature at high tem…

Frequency-dependent conductivity of UPd2Al3 films

1998

The transmission of UPd2Al3 films was studied (4 K < T < 300 K) in the frequency range from 4 to 32 cm−1 by using a coherent source interferometer which allows for measuring both, amplitude and phase. In addition we report on radio frequency and optical measurements. Below 20 K the conductivity and dielectric constant show strong deviations from the behavior of a normal metal which cannot simply be explained by a single renormalized Drude model with an enhanced mass and reduced scattering rate. Instead, we find evidence for the opening of a pseudogap with a gap energy of 6 cm−1 and an extremely narrow ω = 0 mode which is responsible for the large DC conductivity.