Abstract: High-sensitivity laser-based sensors have attracted much interesting for their significant applications in biological applications. In this work, the concept of laser-based detector fabricated by using optical fiber for detection of the hemoglobin concentration in the human blood was proposed. The laser biosensor is based on Mach-Zehnder interferometer (MZI) (micro-holes collapsing) which exhibits high sensitivity changing in the hemoglobin concentration of the blood sample. This sensor measures the reduction in the intensity of light from the laser source. By using this sensor, two drops of human blood sample are sufficient to detect the concentration of the hemoglobin. Green laser with wavelength of 532 nm and input power of 12.2 nw has been used. A calibration curve between the absorbance of the green laser by the blood sample and the hemoglobin concentration was obtained to find the hemoglobin concentration for any blood sample which has the refractive index in the range between (1

• Publication Date: 24-Apr-2019
• DOI: 10.15224/978-1-63248-167-2-05
• Views: 0
• Downloads: 0

Abstract: Because of its wide range of interesting applications including varistor devices, zinc oxide (ZnO) has been extensively studied by several researchers. Pure and 1%mol bismuth doped ZnO nanopowders have been synthesized by sol-gel method to study the effect of sintering temperature of phases alpha, beta and delta on the electrical varistors behavior. The used temperatures were: 650 degree Celsius, 730 degree Celsius, 800 degree Celsius and 900 degree Celsius. The investigations were made by XRD and SEM to determine the structural properties and the Bi intergranular phases. To connect these results to varistor effect, eclectic characteristics J (E) were plotted. Generally, a reasonable amount of Bi2O3 is sufficient to improve the non-ohmic behavior of ZnO-Bi2O3 binary varistors.

• Publication Date: 24-Apr-2019
• DOI: 10.15224/978-1-63248-167-2-06
• Views: 0
• Downloads: 0