Search results for "Metas"

The prognostic value of skeletal muscle index on clinical and survival outcomes after cytoreduction and HIPEC for peritoneal metastases from colorect…

2021

BACKGROUND Cytoreductive surgery (CRS) and hypertermic intraperitoneal chemotherapy (HIPEC) represent the most effective strategy to manage peritoneal metastases (PM). This systematic review and meta-analysis aimed to assess the impact of body composition on clinical outcomes in patients with PM. METHODS A systematic literature search was performed using Medline, Web of Science and EMBASE databases from inception to the 20st August 2020. Data were independently extracted by 3 authors. Newcastle-Ottawa Scale was used to assess quality and risk of bias of studies. Pooled analyses were performed using Mantel-Haenszel method to estimate overall effect size with mean differences or odd ratios (O…

Unexpected tumor reduction in metastatic colorectal cancer patients during SARS-Cov-2 infection: effect of ACE-2 expression on tumor cells or molecul…

2021

TGF-β Dependent T-Cell Regulation in Colitis and Colon Cancer

2008

Transforming growth factor-β (TGF-β) is a potent growth inhibitor endowed with tumor-suppressing activity. Unfortunately, cancers are often resistant to such growth inhibition. This evasion frequently results from a genetic loss of functional TGF-β signaling components. On the other hand, cancer cells often produce high amounts TGF-β1 by themselves and sometimes respond to it with invasion and metastasis. Much effort is being done to develop therapeutic approaches to modulate TGF-β signaling in cancer cells either to inhibit the TGF-β-induced invasive phenotype or to reestablish its growth-inhibitory activities. However, TGF-β is a pleiotropic cytokine with important functions not only in c…

An Osirix based plug-in for the study of dimensional and densitometric changes of hepatic metastases on CT images

2014

Aims and objectives Methods and materials Results Conclusion Personal information References

Theoretical and Experimental Studies of Capillary Hysteresis in MCM-41

1996

Mesoporous materials of MCM-41 type are considered to be reference model adsorbents due to their regular pore structure. Nitrogen adsorption isotherms on MCM-41 are modeled using the Non-Local Density Functional Theory (NLDFT). The thermal dependence of the thermodynamic hysteresis predicted by the NLDFT is confirmed by experimental measurements. The nitrogen hysteresis on MCM-41 at temperatures below 77.4 K or in pores greater than 4 nm is associated with the metastability of the adsorption branch of the isotherm. In the hysteresis regime, the desorption branch is likely to be thermodynamically stable and is recommended for calculating pore size distributions.

Superfluid density in metastable 3He4He mixtures

1990

Abstract We havestudied superfluld 3He4He mixtures quenched into nonequilibrium states inside the miscibility gap by means of second sound . From the results for the second sound velocity we conclude that the superfluid density in the metastable state is well described by extrapolation from equilibrium values. The boundary of the metastable region, where nucleation processes set in rapidly, is reflected in a sharp increase of the second sound attenuation.

Structure of metastable 2D liquid helium

2007

We present diffusion Monte Carlo (DMC) results on a novel, superfluid phase in two-dimensional 4He at densities higher than 0.065 A-2, which is very close to the freezing density. The new phase has anisotropic, hexatic orbital order, but the single-particle density remains constant. By increasing density the hexatic superfluid forms a metastable state, which lies above the crystal ground state in energy. This implies that the liquid-solid phase transition takes place in two stages: a second-order phase transition from the isotropic superfluid to the hexatic superfluid, followed by a first-order transition that localizes atoms into the triangular crystal order.

Magnetic Direct-Write Skyrmion Nanolithography

2020

Magnetic skyrmions are stable spin textures with quasi-particle behavior and attract significant interest in fundamental and applied physics. The metastability of magnetic skyrmions at zero magnetic field is particularly important to enable, for instance, a skyrmion racetrack memory. Here, the results of the nucleation of stable skyrmions and formation of ordered skyrmion lattices by magnetic force microscopy in (Pt/CoFeSiB/W)n multilayers, exploiting the additive effect of the interfacial Dzyaloshinskii-Moriya interaction, are presented. The appropriate conditions under which skyrmion lattices are confined with a dense two-dimensional liquid phase are identified. A crucial parameter to con…

Photoassociative production and trapping of ultracold KRb molecules.

2004

We have produced ultracold heteronuclear KRb molecules by the process of photoassociation in a two-species magneto-optical trap. Following decay of the photoassociated KRb*, the molecules are detected using two-photon ionization and time-of-flight mass spectroscopy of KRb$^+$. A portion of the metastable triplet molecules thus formed are magnetically trapped. Photoassociative spectra down to 91 cm$^{-1}$ below the K(4$s$) + Rb (5$p_{1/2}$) asymptote have been obtained. We have made assignments to all eight of the attractive Hund's case (c) KRb* potential curves in this spectral region.

Mechanisms for the Decay of Unstable and Metastable Phases: Spinodal Decomposition, Nucleation and Late-Stage Coarsening

1989

The basic concepts on the kinetics of phase separation in alloys are introduced, and the current status of the theory is briefly reviewed. Particular emphasis is given to questions such as the conditions under which the linearized theory of spinodal decomposition is valid, the significance of spinodal curves, the possible description of coarsening in terms of power laws and structure-factor scaling, and non-equilibrium percolation phenomena.