The filter disc is used as base to support the spores inside the tiny holes. The filter paper discs are dipped into the medium after the spore phase growth of microorganisms. The whatman filter wet discs are dried at 55-60°C till they are completely dry. The viability of discs stored at room temperature and -20°C were checked at 3, 4, 6 and 2 month intervals. This is cost effective technique. I...

A novel approach to the quantitative determination of xenobiotics in whole blood samples without sample preparation or chromatography is described. This method is based on direct analysis of microlitre volumes of blood which are spotted onto specialized paper cards and dried, with the resulting dried blood spots (DBS) analyzed directly via desorption electrospray ionization (DESI) mass spectrom...

2.1.1 Aqueous extracts preparation The dried form of plant was mixed with sterile distilled water in a ration of 1:20 (100 g in 1 L solvent), and was stirred and heated for about 4 hours. After cooling, the extract was filtered by using Whatman No.1 filter paper. The filtrate was collected and frozen in ice cube container. The frozen ice cube was freeze-dried (i.e. lyophilisation) to obtain con...

Perdeuterated phenanthrene (d-phen) exhibits strong room-temperature phosphorescence (RTP) when adsorbed on Whatman 1PS filter paper. An oxygen sensor was developed that depends on oxygen quenching of RTP intensity of adsorbed d-phen. The system designed employed a continuous flow of nitrogen or nitrogen-air onto the adsorbed phosphor. The sensor is simple to prepare and needs no elaborate fabr...

BACKGROUND & OBJECTIVES Dried blood spotted on to filter paper has been found suitable for a large number of studies. In tropical countries with varying temperature conditions the use of dried blood needs to be validated. We carried out this study to assess the use of blood spotted filter paper as a transport system to study genotyping of Apo E gene. METHODS Fifty five patients visiting Cardi...

Microplastics originated from degraded plastic materials that may be flown to water bodies and accidentally swallowed by aquatic organisms. The research aims understand the microplastics in body Lubuk Siam lake was conducted September November 2020. Samplings were 3 times, once per month, sampling points. At each point, 100 L of taken filtered using a plankton net (30 µm mesh size). To obtain m...