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The objective of this work was to investigate the application of supercritical carbon dioxide as antisolvent for the co-precipitation of-carotene and poly(hydroxybutirate-co-hydroxyvalerate) (PHBV) with dichloromethane as organic solvent. For this purpose, the concentrations of-carotene (1 to 8 mg.cm-3) and PHBV (20 to 40 mg.cm-3) in the organic solution(More)
We investigate modified steepest descent methods coupled with a loping Kaczmarz strategy for obtaining stable solutions of nonlinear systems of ill-posed operator equations. We show that the proposed method is a convergent regularization method. Numerical tests are presented for a linear problem related to photoacoustic tomography and a non-linear problem(More)
We investigate uniqueness in the inverse problem of reconstructing simultaneously a spacewise conductivity function and a heat source in the parabolic heat equation from the usual conditions of the direct problem and additional information from a supplementary temperature measurement at a given single instant of time. In the multi-dimensional case, we use(More)
Quantitative Photoacoustic tomography (QPAT) is an emerging medical imaging modality that offers the possibility of combining the high resolution of acoustic waves and large contrast of optical waves by quantifying the molecular concentration in biological tissue. In this paper, we prove properties of the forward operator that associate optical parameters(More)
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