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04-30-2015, 07:50 PM
Colored Pencils Developed for Easy Chemical-based Diag**stic Testing
http://cdn.medgadget.com/wp-content/uploads/2015/04/reagent-pencils.jpgThanks to a team of researchers from California Polytechnic State*University, chemicals formed into pencils can be used to react with each other by simply drawing*with them on a piece of paper. The work, published recently in the journal Lab on a Chip, is based on*a well-k**wn technique called paper-based microfluidics, which uses the capillary effect of paper to*mix chemicals, indicating the presence or absence of a substance. The channels on the paper are made*using waxy ink, and the chemicals are deposited in the channels by drawing between*the lines. When water is added to the channels, it forces the chemicals to move due to*capillary action and react with one other. As a proof-of-concept, the team tested pencils loaded with*chemicals such as horseradish peroxidase (HRP) for monitoring blood glucose levels, and the results*were identical to that using the traditional approach of finger pricking with a chemical solution.
Additionally, the reagents used for the test are stable for two months in the pencil form, whereas as*liquids they degrade within a few days, making transport and storage easier and less expensive. From*the abstract of the paper, “Reagent pencils offer a new option for preparing and customizing diag**stic tests at the point of care*without the need for specialized equipment.”
Study in Lab on a Chip: Reagent pencils: a new technique for solvent-free deposition of reagents onto paper-based microfluidic devices… (http://pubs.rsc.org/en/content/articlelanding/2015/lc/c5lc00297d#!divAbstract)
Via Phys.org… (http://phys.org/news/2015-04-chemistry-pencils-life-saving-child.html%22/)
The post Colored Pencils Developed for Easy Chemical-based Diag**stic Testing (http://www.medgadget.com/2015/04/colored-pencils-developed-easy-chemical-based-diag**stic-testing.html) appeared first on Medgadget (http://www.medgadget.com).
http://feeds.feedburner.com/~ff/Medgadget?d=yIl2AUoC8zA (http://feeds.feedburner.com/~ff/Medgadget?a=WyQKBvQ1E4U:488eHgkSlAc:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/Medgadget?d=qj6IDK7rITs (http://feeds.feedburner.com/~ff/Medgadget?a=WyQKBvQ1E4U:488eHgkSlAc:qj6IDK7rITs) http://feeds.feedburner.com/~ff/Medgadget?i=WyQKBvQ1E4U:488eHgkSlAc:gIN9vFwOqvQ (http://feeds.feedburner.com/~ff/Medgadget?a=WyQKBvQ1E4U:488eHgkSlAc:gIN9vFwOqvQ)
http://feeds.feedburner.com/~r/Medgadget/~4/WyQKBvQ1E4U
http://cdn.medgadget.com/wp-content/uploads/2015/04/reagent-pencils.jpgThanks to a team of researchers from California Polytechnic State*University, chemicals formed into pencils can be used to react with each other by simply drawing*with them on a piece of paper. The work, published recently in the journal Lab on a Chip, is based on*a well-k**wn technique called paper-based microfluidics, which uses the capillary effect of paper to*mix chemicals, indicating the presence or absence of a substance. The channels on the paper are made*using waxy ink, and the chemicals are deposited in the channels by drawing between*the lines. When water is added to the channels, it forces the chemicals to move due to*capillary action and react with one other. As a proof-of-concept, the team tested pencils loaded with*chemicals such as horseradish peroxidase (HRP) for monitoring blood glucose levels, and the results*were identical to that using the traditional approach of finger pricking with a chemical solution.
Additionally, the reagents used for the test are stable for two months in the pencil form, whereas as*liquids they degrade within a few days, making transport and storage easier and less expensive. From*the abstract of the paper, “Reagent pencils offer a new option for preparing and customizing diag**stic tests at the point of care*without the need for specialized equipment.”
Study in Lab on a Chip: Reagent pencils: a new technique for solvent-free deposition of reagents onto paper-based microfluidic devices… (http://pubs.rsc.org/en/content/articlelanding/2015/lc/c5lc00297d#!divAbstract)
Via Phys.org… (http://phys.org/news/2015-04-chemistry-pencils-life-saving-child.html%22/)
The post Colored Pencils Developed for Easy Chemical-based Diag**stic Testing (http://www.medgadget.com/2015/04/colored-pencils-developed-easy-chemical-based-diag**stic-testing.html) appeared first on Medgadget (http://www.medgadget.com).
http://feeds.feedburner.com/~ff/Medgadget?d=yIl2AUoC8zA (http://feeds.feedburner.com/~ff/Medgadget?a=WyQKBvQ1E4U:488eHgkSlAc:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/Medgadget?d=qj6IDK7rITs (http://feeds.feedburner.com/~ff/Medgadget?a=WyQKBvQ1E4U:488eHgkSlAc:qj6IDK7rITs) http://feeds.feedburner.com/~ff/Medgadget?i=WyQKBvQ1E4U:488eHgkSlAc:gIN9vFwOqvQ (http://feeds.feedburner.com/~ff/Medgadget?a=WyQKBvQ1E4U:488eHgkSlAc:gIN9vFwOqvQ)
http://feeds.feedburner.com/~r/Medgadget/~4/WyQKBvQ1E4U