1,455 research outputs found
GENETICALLY ENCODED IRON SENSOR CELL LINE: A MODEL FOR STUDYING FERROPTOSIS AND CELLULAR IRON METABOLISM
Cell death is a biological process that is essential in proper cellular homeostasis, development, and function. Malfunction of this system can lead to different diseases and cancers. Ferroptosis is a form of cell death that occurs as a result of the accumulation of lipid peroxides, that are dependent on intracellular levels of iron. Iron is essential to multiple metabolic processes in the cell, including the catalyzation of lipid peroxides. Thus, intracellular iron levels must be tightly regulated. Our goal is to create a cellular model to study and detect changes in intracellular iron levels. Through the use of a genetically encoded fluorescent iron sensor, we have generated a stable cell line that provides fluorescent readout on intracellular iron levels. This model can be used to screen for genes, small molecules, and drugs that affect and regulate intracellular iron levels. These findings can then be used to discover new regulators of ferroptosis, data that could be essential to the treatment of ferroptosis-linked diseases
Coherent and generalized intelligent states for infinite square well potential and nonlinear oscillators
This article is an illustration of the construction of coherent and
generalized intelligent states which has been recently proposed by us for an
arbitrary quantum system . We treat the quantum system submitted to the
infinite square well potential and the nonlinear oscillators. By means of the
analytical representation of the coherent states \`{a} la Gazeau-Klauder and
those \`{a} la Klauder-Perelomov, we derive the generalized intelligent states
in analytical ways
Phase operators, temporally stable phase states, mutually unbiased bases and exactly solvable quantum systems
We introduce a one-parameter generalized oscillator algebra A(k) (that covers
the case of the harmonic oscillator algebra) and discuss its finite- and
infinite-dimensional representations according to the sign of the parameter k.
We define an (Hamiltonian) operator associated with A(k) and examine the
degeneracies of its spectrum. For the finite (when k < 0) and the infinite
(when k > 0 or = 0) representations of A(k), we construct the associated phase
operators and build temporally stable phase states as eigenstates of the phase
operators. To overcome the difficulties related to the phase operator in the
infinite-dimensional case and to avoid the degeneracy problem for the
finite-dimensional case, we introduce a truncation procedure which generalizes
the one used by Pegg and Barnett for the harmonic oscillator. This yields a
truncated generalized oscillator algebra A(k,s), where s denotes the truncation
order. We construct two types of temporally stable states for A(k,s) (as
eigenstates of a phase operator and as eigenstates of a polynomial in the
generators of A(k,s)). Two applications are considered in this article. The
first concerns physical realizations of A(k) and A(k,s) in the context of
one-dimensional quantum systems with finite (Morse system) or infinite
(Poeschl-Teller system) discrete spectra. The second deals with mutually
unbiased bases used in quantum information.Comment: Accepted for publication in Journal of Physics A: Mathematical and
Theoretical as a pape
Contributions of M. Daoud, F. Gieres and M. Kibler to the "Concise Encyclopedia of Supersymmetry"
Théori
Offshore wind power integration to support weak grid voltage for industrial loads using VSC-HVDC transmission system
This paper investigates the integration of the offshore wind power plant into the grid using voltage source converter high-voltage direct current (VSC-HVDC). The paper proposes both offshore and onshore converter stations control to support voltage variation in grid. Heavy industrial loads result in a weak grid. In this paper, the effect on industrial loads by the grid strength is shown. Then the paper proposes a solution for the grid voltage support for industrial loads connected to weak grids. The results showed that the increase of grid voltage from 0.7 pu to 1 pu at full load condition that provides a continuous operation without any interruption. The system was modelled using MATLAB/Simulink package
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