فارسی
1
صنایع غذایی::
میکروسکوپ انتقال الکترونی
In addition, the same resinembedded sample can be cut for transmission electron microscopy, giving a direct
(SEM) where the beam is scanned across the surface of the sample and transmission electron microscopy (TEM) which transmits the beam through the (very thin)
Transmission electron microscopy (TEM) offers a different view of the structure of food products.
TEM is relatively rarely used in food product research compared to SEM
Examples of the uses of TEM in foods includes research into the structure of
واژگان شبکه مترجمین ایران
2
مکانیک::
میکروسکوپ الکترونی عبوری
[1] (i) material and structure-related factors, such as (a) type of dislocation slip, (b) grain size, (c) dislocation density and distribution, (d) texture, and (e) residual stresses; (ii) loading factors: (a) stress ratio, (b) mean stress, (c) frequency, (d) tem- perature, and (e) environment; and (iii) designing factors: (a) specimen shapes and dimensions (b) surface conditions, like finishing and hardening or softening treatment of the surface layer.
[23] reported the effect laser shock processing (LSP) on 00Cr12 alloy's mechanical properties at high tem- peratures.
They also observed via transmission electron microscopy (TEM) micrographs that the nanotubes were able to bridge the crack surface of the composite once a crack was initiated.
Furthermore, transmission electron microscopy (TEM) images confirm an excellent dispersion and wetting of the nanotubes in the polymer solution providing visual evidence of matrixreinforcement.
The dis persion of MWCNTs in aqueous SDS solution and in the PS matrix is monitored by UV-vis, transmission electron microscopy, electron tomography and scanning electron microscopy.
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3
متالوژی::
میکروسکوپ الکترونی عبوری
Glasses were traditionally prepared by melting processes at high temperature, although in the last few years and thanks to the development in the sol-gel technol- ogy, they can be prepared with much greater versatility and at relatively low tem- peratures through the sol-gel process (Vallet-Reg� 2006).
Melt glasses are produced by quenching the precursor melt prepared at high tem- perature, which normally contains SiO2 and P2O5 as network formers and CaO and Na2O as network modifiers.
Previous research work demonstrated that decreasing the CaO amount in SiO2-CaO- P2O5 MBGs' porous structure led to an evolution from three-dimensional (3D) cubic structures with Ia-3d symmetry to two-dimensional (2D) hexagonal structures with p6m symmetry (Lopez-Noriega et al. 2006; Izquierdo et al. 2008), as demonstrated by transmission electron microscopy (TEM) studies (Figure 1.15).
TEM studies showed that in the presence of phosphorus, the mesoporous arrangement consisted of a 3D bicontinuous cubic structure, whereas in the absence of phosphorus the structure evolved to 2D hexagonal (Figure 1.16).
FIGURE 1.15 TEM micrographs of MBGs with different calcium composition (top) and 3D reconstruction of the respective mesostructures (bottom).
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