scholarly journals Structural Change of Apoferritin as the Effect of pH Change: DLS and SANS Study

2020 ◽  
Vol 20 (5) ◽  
pp. 1178
Author(s):  
Arum Patriati ◽  
Nadi Suparno ◽  
Grace Tjungirai Sulungbudi ◽  
Mujamilah Mujamilah ◽  
Edy Giri Rachman Putra
Keyword(s):  
Shell Structure ◽  
Small Angle Neutron Scattering ◽  
Physiological Condition ◽  
Core Shell ◽  
Ph Change ◽  
Protein Size ◽  
Complex Protein ◽  
Core Shell Structure ◽  
Nano Size ◽  
Sans Data

Apoferritin is a complex protein potential for drug delivery application. The advantage of apoferritin lies in its core-shell structure, its nano size, and its pH-sensitivity. This study was aimed to characterize the structure of apoferritin due to the pH alteration effect in a solution using dynamic light scattering (DLS) and small-angle neutron scattering (SANS). Both DLS and SANS can observe protein size in solution near its physiological condition. The results show that apoferritin possesses a core-shell structure with a diameter of around 12–13 nm at pH 7. The dissociation of apoferritin occurs at pH 1.9. The SANS data shows the apoferritin at pH 1.9 was dissociated into the smaller oligomer. The structure of this smaller oligomer has a different configuration than the configuration of apoferritin subunits at pH 7. It can cause the failure of reassembly of apoferritin if the apoferritin is neutralized back to pH 7 after dissociation from pH 1.9.

Core−Shell Structure of Degradable, Thermosensitive Polymeric Micelles Studied by Small-Angle Neutron Scattering

2008 ◽  
Vol 112 (3) ◽  
pp. 784-792 ◽  
Author(s):  
Aissa Ramzi ◽  
Rijcken ◽  
Veldhuis ◽  
Dietmar Schwahn ◽  
Wim E. Hennink ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Shell Structure ◽  
Small Angle Neutron Scattering ◽  
Polymeric Micelles ◽  
Core Shell ◽  
Core Shell Structure

Nanocomposite particles for the preparation of advanced nanomaterials

1997 ◽  
Vol 501 ◽  
Author(s):  
P. Somasundaran ◽  
T. Chen
Keyword(s):  
Shell Structure ◽  
Advanced Technology ◽  
Core Shell ◽  
Nanocomposite Particles ◽  
The Core ◽  
Micron Size ◽  
Core Shell Structure ◽  
Shell Particles ◽  
Nano Size ◽  
Core Particles

ABSTRACTNew composites based on nano-size particles provide a promising route to the fabrication of novel materials for advanced technology applications. To produce desired materials, it is important to control the composition and distribution of nanoclusters within the bulk or surface coating of nanostructured materials. Towards this purpose, we have developed a novel method of processing nanocomposite materials utilizing colloidal chemistry techniques to tailor their microstructure. Unique composite aggregates of nanoparticles with a core-shell structure were prepared using a special scheme ofcontrolledpolymer adsorption. Polymers which specifically adsorb on both nano- and micron- size particles are used as tethers to enable desired coating of the later particles with the former and to enhance the cluster integrity. Nanocomposite particles consisting of micron-size alumina or silicon nitride as cores and nano-size alumina, titania, or iron oxide as shell particles have been successfully prepared using this process. The surface charge of the core particles is reversed after the adsorption of polyacrylic acid polymers. This promotes the interaction between the core and the shell particles and therefore nanoparticles added subsequently to the core particle suspension coat on core particles by electrostatic as well as possibly hydrogen bonding bridging mechanisms. Success of the process depends to a large extent on the absence of homoflocculation of nanoparticles and this is achieved by removing all the unadsorbed free polymers from the bulk solution before introducing them to coat on the polymer coated core particles. Coating itself is estimated by monitoring change in the zeta potential of core-shell structure. The coating scheme as well as the characterization of these nanocomposite particles are discussed in detail. This processing scheme provides a simple way for the preparation of both bulk and surface coatings with these engineered nanostructured particles as building blocks.

USE OF SANS AND SAXS IN STUDY OF NANOPARTICLES

2005 ◽  
Vol 04 (05n06) ◽  
pp. 987-994 ◽  
Author(s):  
P. S. GOYAL ◽  
V. K. ASWAL
Keyword(s):  
Small Angle ◽  
Shell Structure ◽  
Small Angle Neutron Scattering ◽  
Core Shell ◽  
X Rays ◽  
X Ray ◽  
The Core ◽  
X Ray Scattering ◽  
Structure Of Nanoparticles ◽  
Core Shell Structure

Small Angle Neutron Scattering (SANS) and Small Angle X-ray Scattering (SAXS), anong other available techniques, are the nost sought after techniques for studying the sizes and shapes of nanoparticles. The contrast between particle and its surrounding is different for X-rays and neutrons. Thus a combined SANS and SAXS study, at times, provides information about the core and the shell structure of nanoparticles. This paper gives an introduction to the techniques of SANS and SAXS and shows results of a study of core-shell structure for a micelle (nanaoparticle of organic material).

Electrical Conductivity of Ni-YSZ Anode for SOFCs According to the Ni Powder Size Variations in Core-shell Structure

2015 ◽  
Vol 53 (4) ◽  
pp. 287-293
Author(s):  
Byung-Hyun Choi ◽  
Young Jin Kang ◽  
Sung-Hun Jung ◽  
Yong-Tae An ◽  
Mi-Jung Ji
Keyword(s):  
Electrical Conductivity ◽  
Shell Structure ◽  
Core Shell ◽  
Powder Size ◽  
Ni Powder ◽  
Core Shell Structure

Preparation of Porous Core/Shell Structure Fe$lt;inf$gt;2$lt;/inf$gt;O$lt;inf$gt;3$lt;/inf$gt;/Al Nanothermite Membrane by Template Method

2015 ◽  
Vol 30 (6) ◽  
pp. 610 ◽  
Author(s):  
ZHENG Guo-Qiang ◽  
ZHANG Wen-Chao ◽  
XU Xing ◽  
SHEN Rui-Qi ◽  
DENG Ji-Ping ◽  
...  
Keyword(s):  
Shell Structure ◽  
Template Method ◽  
Core Shell ◽  
Porous Core ◽  
Core Shell Structure

Functional properties of BaTiO3–Ni0.5Zn0.5Fe2O4 magnetoelectric ceramics prepared from powders with core-shell structure

2010 ◽  
Vol 107 (10) ◽  
pp. 104106 ◽  
Author(s):  
L. P. Curecheriu ◽  
M. T. Buscaglia ◽  
V. Buscaglia ◽  
L. Mitoseriu ◽  
P. Postolache ◽  
...  
Keyword(s):  
Functional Properties ◽  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure

scholarly journals Ternary ZnO/Co3O4/NiO inherited layered core-shell structure from a double template for high performanced supercapacitor

2021 ◽  
Author(s):  
Linli Zhu ◽  
Chen Hao ◽  
Saisai Zhou ◽  
Xiaohong Wang ◽  
Tiantian Zhou ◽  
...  
Keyword(s):  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure

Composite nanoparticles with titania–poly(N-vinylamide) core–shell structure

2021 ◽  
Vol 31 (1) ◽  
pp. 24-26
Author(s):  
Galina M. Kuz’micheva ◽  
Olesya I. Timaeva ◽  
Irina P. Chikhacheva ◽  
Roman V. Svetogorov ◽  
Ratibor G. Chumakov ◽  
...  
Keyword(s):  
Shell Structure ◽  
Composite Nanoparticles ◽  
Core Shell ◽  
Core Shell Structure
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