This report describes a convenient and reproducible method for the covalent modification of poly(dimethylsiloxane) (PDMS) with poly(ethylene glycol) (PEG) chains to suppress nonspecific protein adsorption. PEG additives terminated with a vinyl group are added into the PDMS prepolymer; when the PDMS is thermally cured, the vinyl group reacts with the silane groups on the PDMS, which covalently link the PEG group to the PDMS network. The PEG-modified PDMS surfaces are characterized with FT-IR, X-ray photoelectron spectroscopy (XPS), and contact angle measurement. We also examined the modified PDMS for on-chip capillary electrophoresis and its capability of resisting nonspecific protein adsorption using bovine serum albumin (BSA) as a model. Based on our study, a molecular mechanism is given to successfully explain the surface properties of the modified PDMS surfaces. Learn more about these metrics Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.
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I've read in the doc that every memory allocation done in a spi memory context was freed at the end of the context (after spifinish) What happens if the context is is initialized inside another one? Here is my function: spiconnect execute query1. Execute query10; spifinish The thing is that I do another spiconnect inside all subqueries (query1. Query10) and the memory allocated inside all 'subcontext' doesn't seems to be freed until the last call of spifinish.
(the one of the 'big' function). Hopefully I was clear enough:) Any help? Responses. at 2004-03-03 15:08:56 from Tom Lane pgsql-general by date: From: Colin Fox Date: 2004-03-03 12:39:38 Subject: Trigger using 'if NEW = OLD': From: satish satish Date: 2004-03-03 12:27:33 Subject: Data Corruption in case of abrupt failure.
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