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The aim of the present work was to study the structure and catalytic performance of Al- and Ga- substituted MCM-41 mesoporous materials for the α-pinene isomerization reaction.
The ordered hexagonal porous structure is also visible in the Ga-MCM-41 and Al-MCM-41 electron micrographs, Figure 3 a) and b).
Since no peaks are observed in the pure silica MCM-41, peaks observed on the NH3-TPD lines in the Ga and Al modified samples are caused by the Al and Ga in the structure.
This work has shown that the incorporation of Al and Ga within the MCM-41 structure makes possible the conversion of αpinene into camphene and limonene.
Ponzi: Materials Chemistry and Physics Vol. 93 (2005), p. 296

The resulting patterns can mimic some of the diverse tissue-specific orientation and three-dimensional (3D) fibrous structure.
This is mainly due to the ease of fabricating nanofibers from a variety of materials and it allows a certain level of control over the nano-structure that can be constructed.
However, most electrospun scaffolds are restricted to planar structures.
Scaffold structure determines the transport of nutrients, metabolites and regulatory molecules to and from the cells, whereas the scaffold chemistry has an important role in cell attachment and differentiation.
Enhancement of neurite outgrowth using nano-structured scaffolds coupled with laminin.

b Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore - 632 115, Tamilnadu, India.
The morphology clearly exhibits that the narrower particle distribution on the porous structure of zinc stannate.
The band positions and number of absorption peaks are depending on crystalline structure and chemical composition.
PL analysis is a suitable technique to determine the crystalline quality and the presence of defect structure in nanoparticles.
FTIR spectra depict the band positions and numbers of absorption peaks are depending on the crystalline structure and chemical composition.

These are attributed to functionalization of graphene oxide [14, 15]. 3.3 High Resolution Scanning electron microscope Scanning electron microscopy images reveals the nanosheets layered internal structures of ultrathin and homogeneous graphene oxide films.
It reveals a crumpled and rippled structure which might be due to the deformation upon the exfoliation and restacking process [17].
The SEM image of f-GO (fig. 3 (a)) shows a layered structure of ultra-thin and homogeneous graphene films, entangled with each other.
The shift in the 2-theta angle of this peak (002) from 26.36o in moving from graphite to graphite oxide was attributed to the graphite nanosheets being partially oxidised to graphene oxide and restacked into an ordered crystalline structure.
The SEM image of f-GO, shows a layered structure of ultra-thin and homogeneous graphene films, entangled with each other and the Pt particles are spread out on the graphene sheets and when magnified a uniform distribution of Pt nanoparticles can be observed.

This is attributed due to the stoichiometric stability of composition of the YIG structure, where there is no tendency in the electron hopping between Fe3+ ↔ Fe2+ to occur.
In fact, resistivity is a result of the combined influence of several factors such as crystal structure perfection, grain size, microstructural homogeneity, and Fe2+ ion concentration [19].
It is known that the electrical resistivity is an intrinsic property of ferrites, thus their crystal structure is concerned.
The larger grain size results in better crystallinity of samples, therefore increasing the stoichiometric stability of YIG structure.
Kotnala, Preparation and characterization chemistry of nano-crystalline Ni–Cu–Zn ferrite, J.

A 3D scaffold would allow cells to grow, proliferate, and differentiate into the structure of a bone itself.
Osteoblast attachment occurred via filopodia and lamellipodia, and they went on to remodel into the structure of a bone/ structure of scaffold [29].
The reason being that the protein adsorption is not supported owing to the variation in surface energy and surface chemistry.
Bandyopadhyay, Functionally graded Co–Cr–Mo coating on Ti–6Al–4V alloy structures, Acta Biomater. 4 (2008) 697–706
Bandyopadhyay, Low stiffness porous Ti structures for load-bearing implants, Acta Biomater. 3 (2007) 997–1006

The phenomena of CV molecules entering LMSH interlayers is largely due to layer structure of LMSH molecule.
The changes come from the structure of CV molecule.
The main reason of the above phenomena is that LMSH forms a "House of card" structure.
(2) PMMT and LMSH were both the layer structure in the aqueous solution.
Li, Physical Chemistry of Silicate,Tian Jin,(2010) 125-160

Amikacin was then included in the structure of N,Zn-CDs to enhance their ability to detect E. coli.
The incorporation of N and Zn dopants into the structure of CDs affects the fluorescence emission intensity of N,Zn-CDs. 
N,Zn-CDs were characterized using XRD to identify their crystalline structure.
The acquired TEM images reveal nanoparticles of carbon with an uneven structure.
The addition of amikacin to the structure of N,Zn-CDs enhanced the fluorescence emission intensity.

X-ray diffraction (XRD) analysis The crystalline structure of the adsorbents was determined using a Panalytical X'Pert Pro X-ray diffractometer.
Physicochemical characterization SEM observation SEM observation (Fig. 2) shows a clearer homogeneous porous structure with almost homogeneous diameters ranging from 1.158 to 3.212 μm, exhibiting a rough surface texture in the case of activated carbon obtained by carbonization at 350 °C of Cardoon waste, which is initially fibrous and non-porous [1].
For commercial carbon, a heterogeneous structure is observed with the presence of micropores with diameters between 0.326 μm and 3.270 μm.
Both carbons have a homogeneous porous structure.
Boehm, Some aspects of the surface chemistry of carbon blacks and other carbons, Elsevier Sci. 32 (1994) 759–769. doi: 10.1016/0008-6223(94)90031-0

The study investigated the structure of the integrated solar and hydraulic jump enhanced waste stabilization pond (ISHJEWSP) variables.
The Pearson’s R-matrix and Kaiser–Meyer–Olkin (KMO) statistics were used for evaluating the structure of the variables.
To this end, the study investigated the structure of the ISHJEWSP variables.
The optimization of the factor structure via rotation yielded eigenvalues of 3.354 and 1.180 for components 1 and 2, respectively.
Water 2021, 13, 1193. https://doi.org/10.3390/w13091193 [18] Bunce NJ (1991) Environmental chemistry.