SENSOR FOR MEASUREMENT OF OXYGEN CONCENTRATION IN SMALL VOLUMES OF BIOLOGICAL LIQUIDS

Tip sensor probe for changing refractive index measurement in small volumes

In this paper, a tapered tip optical fiber probe sensor for localized refractive index (RI) measurements is presented. This sensor’s interaction with analytes is confined to a few micro-meters which makes it a promising candidate for in-vivo or even intra-cellular RI monitoring. This tapered tip was simply fabricated by etching optical fiber with hydrofluoric acid to a conic shape with a sub-m...

study of cohesive devices in the textbook of english for the students of apsychology by rastegarpour

this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...

Simultaneous viscosity and density measurement of small volumes of liquids using a vibrating microcantilever†

Many industrial and technological applications require precise determination of the viscosity and density of liquids. Such measurements can be time consuming and often require sampling substantial amounts of the liquid. These problems can partly be overcome with the use of microcantilevers but most existing methods depend on the specific geometry and properties of the cantilever, which renders ...

Optical measurement of oxygen concentration in water

Measurement of iodine concentration in biological material.

Determination of iodine in biological material presents technical problems because of the large amounts of organic material present and because the concentration of iodine is often low. Many workers have used a chloric acid-digestion procedure (1), but this is tedious, and Richmond (2) found it less satisfactory for accurate measurement of fecal iodine than for determining iodine in serum or ur...