53 citations · 151 across the 7 of their papers we have counts for
7 papers
Red Blood Cell Sphericity Index Obtained by Defocusing Microscopy and Retinopathy Severity in Sickle Cell Disease
Camilo Brandao-de-Resende, Ubirajara Agero, Oscar N. Mesquita +2
Proliferative sickle cell retinopathy (PSCR) is the most important ocular manifestation of sickle cell disease (SCD), but understanding of its pathophysiology remains incomplete. R…
Shape reconstruction and height fluctuations of red blood cells using defocusing microscopy
L. Siman, P. M. S. Roma, F. T. Amaral +2
In this paper the bright-field defocusing microscopy (DM) technique is presented. DM is able to obtain quantitative information of each plane/surface of pure phase objects, as live…
Total 3D imaging of phase objects using defocusing microscopy: application to red blood cells
P. M. S. Roma, L. Siman, F. T. Amaral +2
We present Defocusing Microscopy (DM), a bright-field optical microscopy technique able to perform total 3D imaging of transparent objects. By total 3D imaging we mean the determin…
DNA-psoralen: single-molecule experiments and first principles calculations
M. S. Rocha, A. D. Lúcio, S. S. Alexandre +2
The authors measure the persistence and contour lengths of DNA-psoralen complexes, as a function of psoralen concentration, for intercalated and crosslinked complexes. In both case…
Transition on the entropic elasticity of DNA induced by intercalating molecules
M. S. Rocha, M. C. Ferreira, O. N. Mesquita
We use optical tweezers to perform stretching experiments on DNA molecules when interacting with the drugs daunomycin and ethidium bromide, which intercalate the DNA molecule. Thes…
Towards absolute calibration of optical tweezers
N. B. Viana, M. S. Rocha, O. N. Mesquita +3
Aiming at absolute force calibration of optical tweezers, following a critical review of proposed theoretical models, we present and test the results of MDSA (Mie-Debye-Spherical A…