2 research outputs found
A New Strategy for the Morphological and Colorimetric Recognition of Erythrocytes for the Diagnosis of Forms of Anemia based on Microscopic Color Images of Blood Smears
The detection of red blood cells based on morphology and colorimetric
appearance is very important in improving hematology diagnostics. There are
automatons capable of detecting certain forms, but these have limitations with
regard to the formal identification of red blood cells because they consider
certain cells to be red blood cells when they are not and vice versa. Other
automata have limitations in their operation because they do not cover a
sufficient area of the blood smear. In spite of their performance, biologists
have very often resorted to the manual analysis of blood smears under an
optical microscope for a morphological and colorimetric study. In this paper,
we present a new strategy for semi-automatic identification of red blood cells
based on their isolation, their automatic color segmentation using Otsu's
algorithm and their morphology. The algorithms of our method have been
implemented in the programming environment of the scientific software MATLAB
resulting in an artificial intelligence application. The application, once
launched, allows the biologist to select a region of interest containing the
erythrocyte to be characterized, then a set of attributes are computed
extracted from this target red blood cell. These attributes include
compactness, perimeter, area, morphology, white and red proportions of the
erythrocyte, etc. The types of anemia treated in this work concern the
iron-deficiency, sickle-cell or falciform, thalassemia, hemolytic, etc. forms.
The results obtained are excellent because they highlight different forms of
anemia contracted in a patient.Comment: ISIS
Alkaline Leaching of Metals from Cathodic Materials of Spent Lithium-Ion Batteries
International audienceThe aim of this study was to recover metals from the positive electrode material for recycling in lithium-ion batteries. It was focused on research to optimize the hydrometallurgical pretreatment process of cathode materials for Li-ion batteries by varying parameters such as NaOH concentration, the ratio of solvent volume to mass of the test sample (liquid-solid ratio (L/S)) and reaction time. Thus, from used batteries collected in a local market (Colobane, Senegal), cathodic materials dried in an oven at 50°C for 24 hours, submitted to alkaline leaching with NaOH 2, 3 or 4N, followed by filtration, all at room temperature. The filtrates obtained were analyzed by atomic absorption spectrophotometry. The results obtained were showed that Al collectors could be better extracted with 4N NaOH for 5 hours at a ratio liquid/solid (L/S) = 10/1, with small quantities of the metals Co, Mn, Ni and Li found in the filtrates