The properties, structure and functions of the erythrocyte or red blood cell (RBC) have been known and evaluated by using simpler to more sophisticated technical devices. Microscopy, flow cytometry, spectrometry, spectroflurometry, aggregometer, ektacytometer zeta potential, amperometry, electrophoresis and centrifugation, are apparatus used to qualitatively and quantitatively characterize RBC,...

A platelet aggregometer was adapted for the simultaneous measurement of perpendicular light scattering in addition to light transmission. The addition of chemoattractants to polymorphonuclear leukocyte suspensions evoked a single wave of increased light transmission, whereas the perpendicular scattering measurement demonstrated a previously unrecognized biphasic response. The first perpendicula...

Platelet-dependent activation of polymorphonuclear neutrophils (PMNL) was investigated with a lumi-aggregometer in heparinized whole blood and platelet-PMNL suspensions. The lumi-aggregometer allowed us to simultaneously monitor increases in impedance or light transmission as consequences of platelet aggregation and luminol-enhanced chemiluminescence (CL) as a measure of the oxidative burst in ...

to study the resistance to standard dosage of clopidogrel among iranian patients following percutaneous coronary intervention measured by platelet aggregation test.patients undergoing percutaneous coronary intervention in imam hussein medical center, tehran, iran, who were under treatment with aspirin, but had no history of clopidogrel usage, entered the study. patients received standard dosage...

To study the resistance to standard dosage of clopidogrel among Iranian patients following percutaneous coronary intervention measured by platelet aggregation test.Patients undergoing percutaneous coronary intervention in Imam Hussein Medical center, Tehran, Iran, who were under treatment with aspirin, but had no history of clopidogrel usage, entered the study. Patients received standard dosage...

To study the resistance to standard dosage of clopidogrel among Iranian patients following percutaneous coronary intervention measured by platelet aggregation test.Patients undergoing percutaneous coronary intervention in Imam Hussein Medical center, Tehran, Iran, who were under treatment with aspirin, but had no history of clopidogrel usage, entered the study. Patients received standard dosage...

the purpose of the present paper is to develop light beam method to measurement of interfacial area in a rectangular gas-liquid bubble column. total interfacial area can be determined in bubble column filled by transparent liquid by light transmission method. according to pervious researches, the fraction of parallel light is function of interfacial area and optical path length that these two p...

  Objective: Zirconia cores have limited light transmittance and data are scarce on light transmission through zirconia cores with and without the veneering ceramic.   Methods: In this in vitro study, Disc-shaped specimens (11.5 mm in diameter and 0.4 (0.05) mm in thickness) were fabricated of three types of zirconia namely Mamut, Heany and ZirkonZahn (n=5). A disc-shaped specimen (11.5 mm in d...

The concentration of von Willebrand factor (vWf) in patients' plasma can be determined by measuring the ristocetin cofactor activity (vWf R:Co). However, this vWf R:Co assay is time consuming, which limits its routine use. Several commercial vWf R:Co tests, based on agglutination of lyophilized fixed platelets, are available. We evaluated the slide tests and aggregometer assays from Behring and...

The purpose of the present paper is to develop light beam method to measurement of interfacial area in a rectangular gas-liquid bubble column. Total interfacial area can be determined in bubble column filled by transparent liquid by light transmission method. According to pervious researches, the fraction of parallel light is function of interfacial area and optical path l...