In the present study,
we examined the secondary and tertiary structure of myoglobin (Mb)
within folded sheets mesoporous material (FSM)- and Santa Barbara
amorphous (SBA)-type mesoporous silicas. The Barrett–Joyner–Halenda
pore diameters of SBA-type mesoporous silicas were 39, 70, and 75
Å, and that of FSM-type mesoporous silica was 40 Å. The
secondary and tertiary structures of myoglobin were observed by Fourier
transform infrared (FTIR) and small-angle neutron scattering (SANS),
respectively. The FTIR and SANS results indicated preservation of
the secondary and tertiary structures of myoglobin inside the pores
of SBA-type mesoporous silicas. Adsorption of myoglobin within FSM-type
mesoporous silica, however, resulted in perturbation of the tertiary
structure, accompanied by partial unfolding of the secondary structure.
Lower structural stability of myoglobin within the FSM-type mesoporous
silica was also confirmed. These findings suggest that the Mb structure
is more influenced by the inner pore surface characteristics than
by geometrical pore size.
In order to prepare the optimal condition for the resonant optical manipulation, a lot of CuCl particles with a broad size-distribution ranging from 10 nm to 10 µm have been directly fabricated from a bulk sample by laser ablation in superfluid helium. We irradiated these particles with the laser light covering the excitonic resonance levels of particles smaller than 100 nm in order to transport them onto a target silicon substrate by using resonant radiation force. As a result, we have observed that many particles of from 10 to 50 nm diameters adhere to the substrate. This means that these nanoparticles are transported by the resonant radiation force much stronger than the gravitational force.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.