Temporal availability of public health care in developing countries of the Caribbean: An improved two-step floating catchment area method for estimating spatial accessibility to health care.

Due to restrictions on personnel availability, the service capacity at a health facility may vary day to day based on an established schedule. This temporal variability influences a user's choice set, modifying their possible choices. As a result, the spatial accessibility of public health care may be constantly reshaped rather than being a relatively static experience as commonly represented in place-based spatial accessibility literature.

Quantification of isozyme-specific activation of phospholipase C-beta2 by Rac GTPases and phospholipase C-epsilon by Rho GTPases in an intact cell assay system.

Phospholipase C (PLC) catalyzes the hydrolysis of PtdIns(4,5)P2, which results in both formation of the second messengers Ins(1,4,5)P3 and diacylglycerol and alteration in the membrane association and/or activity of PtdIns(4,5)P2-binding proteins. The existence of 13 different PLC isozymes suggests multiple mechanisms of regulation of inositol lipid signaling, and the recent realization that Rho-family GTPases directly bind and activate certain PLC isozymes has added to this potential diversity of inositol lipid-related signal transduction. With the goal of delineating a less labor-intensive method for quantification of intracellular inositol phosphate production, we have applied a commercially available yttrium silicate RNA binding resin selective for inositol phosphates to develop a high-throughput inositol phosphate scintillation proximity assay (SPA).