This manuscript describes the use of a portable and low cost fluorescence setup to quantify the concentration of ochratoxin A (OTA) in beverage samples using an in-house developed system and different color models. It is reported that OTA is naturally fluorescent, for that reason an ultraviolet light at 365 nm was used to excite the samples and a Complementary Metal Oxide Semiconductor (CMOS) s...

LTHOUGH THE LEVEL of circulating serum enzyme activity may not in many instances represent occurrences at the cellular level, there has been a consistent increase in the number of requests for clinical serum enzyme determinations. There has also been an increase in the number of types of enzyme activity requested, making it imperative for clinical chemistry laboratories to employ the most effic...

The development of a novel, low power optical sensing platform based on light emitting diodes (LEDs) is described. The sensor is constructed from a pair of LEDs fused together at an angle where one LED functions as the light source and the other LED is reverse biased to function as a light detector. Sensor function is based on the level of light received by the detector diode, which varies with...

Different sample pretreatment extraction techniques and analytical methods are often used for nitrate determination in vegetables; however, the effects of these variables have not been properly examined. Therefore, (oven-dried fresh extraction) (colorimetric method (salicylic (SM)) high-performance liquid chromatography (HPLC) were compared Chinese kale (K) morning glory (M) this study. Oven-dr...

BACKGROUND Angioscopy surpasses other diagnostic tools, such as angiography and intravascular ultrasound, in detecting arterial thrombus. This capability arises in part from the unique ability of angioscopy to assess true color during imaging. In practice, hardware-induced chromatic distortions and the subjectivity of human color perception substantially limit the theoretic potential of angiosc...

The detection of amplified products resulting from polymerase chain reactions (PCRs) remains a complicated process. To simplify the detection procedures, we developed a colorimetric microtiter plate hybridization assay for the specific detection of 5'-biotinylated PCR fragments of Mycobacterium leprae DNA. For this assay, an M. leprae DNA capture probe was made and immobilized on the wells of a...

Progrlsive cone dystroph!, ((:OI)), cone-rod dystrophy (CRD), choroidereruia (CHD) and rethdlis p@nentosa are fouur retinal progressive diwnl+rs which can he inherited iu a X linked fasbioo. We present 13 families afktd with ooe of tbes:r 4 disoredr;. We bare studied 16 arfecti men aurl 30 puaible feumle carriers. A completr ophtiilmic exploratiou a115 ILRG resting baoe hen done in every cxx. I...