The inhibitory activities of compound 1 and its N-methyl derivative (1a) against porcine respiratory and reproductive syndrome virus (PRRSV), human leukemic K562 cells, and human breast cancer MCF-7 cells were evaluated.

Compounds 1 [50% inhibited concentration (IC50)=12.5 +/- 0.6M] and 1a (IC50=15.7 +/- 0.9M) were cytotoxic against K562 cells. Compound 1a also had a weak effect on PRRSV with an IC50 value of 31.9 +/- 6.0M [selectivity index (SI)=18.7].”
“We have selleck chemicals studied the effect of flap parameters on fluid rectification in a microfluidic diode. We use Navier-Stokes equations and arbitrary Lagrangian-Eulerian formulation to obtain dynamics of fluid flow and motion of the flap. The flap opens during forward flow and seals against a stopper during reverse flow. This allows flow in the forward direction and prevents it in the reverse direction. The rectifier is fluidic analog to a semiconductor diode in function because it rectifies fluid flow. Velocity-pressure (V-P) curves analog to the current-voltage see more (I-V) curves of the electronic

diode has been obtained. The effect of the flap parameters, such as length, thickness, and Young’s modulus has been found out. The transient response of the flap and fluid flow under oscillating pressure driven flow has also been obtained. (C) 2010 American Institute of Physics. [doi:10.1063/1.3492403]“
“A new C18-diterpenoid alkaloid, kirinenine A (1), was isolated from the root of Aconitum kirinense, along with eight known diterpenoid alkaloids. The structures of all compounds were characterized on the basis of extensive NMR and MS analyses and by comparison with literature values, and the new one was further confirmed by X-ray crystallographic diffraction. All the compounds were isolated selleck chemicals llc from the title plant for the first time.”
“Rapid prototyping of polydimethylsiloxane (PDMS) is often used to

build microfluidic devices. However, the inherent hydrophobic nature of the material limits the use of PDMS in many applications. While different methods have been developed to transform the hydrophobic PDMS surface to a hydrophilic surface, the actual implementation proved to be time consuming due to differences in equipment and the need for characterization. This paper reports a simple and easy protocol combining a second extended oxygen plasma treatments and proper storage to produce usable hydrophilic PDMS devices. The results show that at a plasma power of 70 W, an extended treatment of over 5 min would allow the PDMS surface to remain hydrophilic for more than 6 h. Storing the treated PDMS devices in de-ionized water would allow them to maintain their hydrophilicity for weeks.