333 research outputs found
Modelowanie Rozkladu Pól Magnetycznych Sluzacych Do Prowadzenia Wiazki Plazmy Powstajacej W Wyladowaniach Lukowych
Involvement of the phosphoinositide 3-kinase/Akt signaling pathway in the resistance to therapeutic treatments of human leukemias.
The Evolution of Dust Disk Sizes from a Homogeneous Analysis of 1-10 Myr old Stars
We utilize ALMA archival data to estimate the dust disk size of 152
protoplanetary disks in Lupus (1-3 Myr), Chamaeleon I (2-3 Myr), and Upper-Sco
(5-11 Myr). We combine our sample with 47 disks from Tau/Aur and Oph whose dust
disk radii were estimated, as here, through fitting radial profile models to
visibility data. We use these 199 homogeneously derived disk sizes to identify
empirical disk-disk and disk-host property relations as well as to search for
evolutionary trends. In agreement with previous studies, we find that dust disk
sizes and millimeter luminosities are correlated, but show for the first time
that the relationship is not universal between regions. We find that disks in
the 2-3 Myr-old Cha I are not smaller than disks in other regions of similar
age, and confirm the Barenfeld et al. (2017) finding that the 5-10 Myr USco
disks are smaller than disks belonging to younger regions. Finally, we find
that the outer edge of the Solar System, as defined by the Kuiper Belt, is
consistent with a population of dust disk sizes which have not experienced
significant truncation
High quality superconducting niobium films produced by Ultra High Vacuum Cathodic Arc
The vacuum arc is a well-known technique to produce coating with enhanced
adhesion and film density. Many cathodic arc deposition systems are actually in
use in industry and research. They all work under (high) vacuum conditions in
which water vapor pressure is an important source of film contamination,
especially in the pulsed arc mode of operation. Here we present a Cathodic Arc
system working under Ultra High Vacuum conditions (UHVCA). UHVCA has been used
to produce ultra-pure niobium films with excellent structural and electrical
properties at a deposition temperature lower than 100oC. The UHVCA technique
therefore opens new perspectives for all applications requiring ultra-pure
films or, as in the case of Plasma Immersion Ion Implantation, ultra-pure
plasmas.Comment: submitted to AP
Constitutively active Akt1 protects HL60 leukemia cells from TRAIL-induced apoptosis through a mechanism involving NF-kappaB activation and cFLIP(L) up-regulation.
Antiapoptotic role of p38 mitogen activated protein kinase in Jurkat T cells and normal human T lymphocytes treated with 8-methoxypsoralen and ultraviolet-A radiation.
Deguelin, A PI3K/AKT inhibitor, enhances chemosensitivity of leukaemia cells with an active PI3K/AKT pathway
Intranucleolar localization of DNA topoisomerase IIalpha is a distinctive feature of necrotic, but not of apoptotic, Jurkat T-cells.
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