The synthesis of silica-coated branched gold nanoparticles requires a first step in which gold nanoparticles are coated with mesoporous silica shells with pores extending radially from the center toward the outer particle surface.
The major limitations of this approach may be represented by the exclusive autologous use and by the need of slightly more complex surgical procedures that require a first step for ASC isolation and a second approach for cell purification and bioscaffols implantation.
That is why the analysis requires a third step.
Most methods of DNA purification from protoscoleces of Echinococcus granulosus involve the use of expensive kits and may also require a second step after extraction for an effective purification.
Bcl-2 downregulation is not sufficient, however, and apoptosis requires a second step that is mediated by an increase in Bim expression.
In addition to loop formation, polymer models require a second step to accurately simulate the formation of cylindrical chromosomes: compression along the longitudinal chromosome axis [ 30].
For samples requiring a second step reagent, the PBA was aspirated and streptavidin-fluorochrome (PharMingen, San Diego, CA, USA) was added at 1 : 400 in 200 μl PBA and incubated with shaking at 4°C for 1 1.5 h, followed by washing as described above.
This is also required as a first step in a fully-automatic video database management system in which the labeling should also be done automatically.
For these efforts to yield useful results, research is required, as a first step, into the factors that influence energy choice and consumption behaviour of households, especially due to the fact that household fuel consumption varies tremendously across geographic regions due to disparities in availability of different amenities and energy sources [17, 18].
Similarly, precise genetic maps are required as a first step to locate and identify major genes as well as quantitative trait loci (QTL) involved in traits of interest.
