Esame completo di Technologies for Sensors and Clinical Instrumentation per il corso di Biomedical Engineering presso Politecnico di Milano. Materiale proveniente dall’archivio storico Studwiz e classificato per la consultazione online.
Esame completo di Technologies for Sensors and Clinical Instrumentation per il corso di Biomedical Engineering presso Politecnico di Milano. Materiale proveniente dall’archivio storico Studwiz e classificato per la consultazione online.
Qualità dell’importazione: il testo è stato estratto direttamente dal documento originale.
Passaggi rappresentativi riconosciuti nelle diverse parti del materiale. Il testo completo resta presente nella pagina per la ricerca, mentre l’anteprima compatta rende più semplice la lettura.
Grade of written test: Final grade: Grade of project: Signature: Technologies for Sensors and Clinical Instrumentation 16 September 2015 FAMILY NAME ……………………….… NAME ….…………………. MATR ………… PREFERENCE for ORAL: 17 September (morning) 22 September (morning) 6 October (morning) next calls Notes: - Answers are considered complete only if units of measurement are indicated. - Only answers on printed sheets are considered for evaluation. Q.1) (7 points) …/2 - 1.a) Describe the working principle of a Coulter Counter. ……………………………………………………………… ………………………………………..……………………… ……………………………………………………………… ………………..……………………………………………… ………………………………………………………..……… ……………………………………………………………… ………………………………..……………………………… ……………………………………………………………… ………..……………………………………………………… ………………………………………………..……………… ……………………………………………………………… ………………………..……………………………………… ………………………..……………………………………… ……………………………………………………………….. ……………………………………………………………………………………………………….. ……………………………………………………………………………………………………….. ……………………………………………………………………………………………………….. ……………………………………………………………………………………………………….. A constant-voltage Coulter Counter (in figure) is used to compute the size of neutral particles. The particles are inserted in the left compartment and flow through a small aperture (diameter Ø ݉݊ length ൌ ݉݊ ,zeta potential ܸ݉ surface negatively coated). A negative hydraulic pressure of ܽܲܭis applied to the right cell, while the left cell is at atmospheric pressure. A negative voltage is applied to the right cell, equal to ܸ݉ . 1 - 1.b) Total particle velocity within the aperture ݒ is given by the sum of three contributions: a) hydrodynamic flow due to the difference of hydraulic pressure through the apertureݒு௬ௗ, b) electrophoretic flow ݒா and c) electro-osmotic flow ݒாை. Which one among these contributions is negligible?…
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