Human VCL(Vinculin) ELISA Kit

The objective of this study was to evaluate the quality of mithun semen by computer assisted sperm analysis (CASA). Ejaculates (50) were analysed by CASA. Semen motility was evaluated for kinetics parameters. The percentage of total motile and progressive motile spermatozoa were determined. Several velocities parameters were also determined viz., average path velocity (VAP, mu m/s), track speed (VCL, mu m/s), progressive velocity (VSL, mu m/s), lateral amplitude (ALH), beat frequency (BCF, Hz), straightness (%), elongation (%), linearity (%), and area (mu m sq). The result revealed a strong positive correlation between various CASA parameters (PMOT-VAP, PMOT- VSL, VAP-VSL, VAP-ALH, VSL-ALH, STR-LIN).The present study confirmed the usefulness of CASA for a quick and objective analysis of sperm concentration, motility and other velocity parameters.

Well-defined thermoresponsive amphiphilic statistical copolymers based on N-vinylcaprolactam (VCL) and vinyl acetate (VAc) were successfully synthesized by RAFT/MADIX polymerization mediated by O-ethyl-S-(1-ethoxycarbonyl)ethyldithiocarbonate chain transfer agent at 65 degrees C. We achieved the synthesis of a series of copolymers with controlled molar masses and low dispersities over a wide range of monomer feed ratios (0 < f(VAc,0) < 1). Both conventional linearization methods and a nonlinear least-squares methods (NLLS) were applied to estimate reliable values of reactivity ratios for VAc and VCL radical polymerization in regards to the disparate values previously reported in the literature. The highest measurement precision was observed for the NLLS method based on the integrated form of the copolymerization equation developed by Skeist. The calculated values of the reactivity ratios (r(VAc) = 0.33 +/- 0.10 and r(VCL) = 0.29 +/- 0.15) perfectly fitted the drift in monomer feed ratio versus conversion. The VCL and VAc monomer units are distributed homogeneously along the copolymer chains. Both the cloud point temperatures and glass transition temperatures evolve linearly with the copolymer composition. Analyses of the aqueous solutions of the amphiphilic copolymers by means of dynamic and static light scattering show that P(VAc-co-VCL) copolymers undergo a reversible temperature-induced conformational change between large aggregates (T > T-cloud point) and either unimers for F-VAc inferior to 0.3 (N-agg = 1, D-h similar to 7 nm) or small aggregates for F-VAc = 0.53 (N-agg = 3, D-h similar to 14 nm).