In agreement with experimental results, sawtooth-shaped load characterizes the process of tip retraction.
The process of "tip growth" versus "base growth" depends on the interactions between the catalyst film and the substrate.
However, compared with the twinning faults that occur during indentation shown in Fig. 3d, more twinning faults are observed in the process of tip retraction, as shown Fig. 5a.
For example, Jagged1, another critical component in the process of tip cell selection, which antagonizes Dll4/Notch signaling during angiogenesis, was detected in stalk cells, where Dll4 was absent [44].
Students are initially given a lecture that introduces them to the process of tip growth and the cell types that extend by this process.
Then, to visualize the process of tip cell selection between two neighboring cells exhibiting Ca2+ oscillations, we performed Ca2+ imaging for a longer period and found that only one cell maintained the oscillations over time.
This article describes a lab exercise that can be used either as part of a lab course or as a tutorial exercise in which students are given growth rate data for three cell types that extend by the process of tip growth.
I am talking about how we all are in process of tipping over one of those "sacred" cows -- in this case, the idea of who can use what bathroom is tied to the safety of women.
In the process of Ni tip retraction, stress intensity near the interface of Ni tip and Cu substrate is not very high because the steps of Ni tip are closely surrounded by Cu atoms, as shown in the inset of Fig. 5a.
