Development of Pathology Specimen Preparation Method by Supercooling Cryopreservation under Magnetic Field

2012 ◽  
Vol 5 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Takashi Nakagawa ◽  
Makoto Mihara ◽  
Shuhei Noguchi ◽  
Kazuhiro Fujii ◽  
Tetsuo Ohwada ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Pathology Specimen

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

Scanning electron microscopy of human iliac bone by a simple preparation method

1990 ◽  
Vol 48 (3) ◽  
pp. 226-227
Author(s):  
Toshihiko Takita ◽  
Tomonori Naguro ◽  
Toshio Kameie ◽  
Akihiro Iino ◽  
Kichizo Yamamoto
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Real Surface ◽  
Public Attention ◽  
Preparation Methods ◽  
The Real ◽  
Simple Preparation ◽  
Scanning Electron

Recently with the increase in advanced age population, the osteoporosis becomes the object of public attention in the field of orthopedics. The surface topography of the bone by scanning electron microscopy (SEM) is one of the most useful means to study the bone metabolism, that is considered to make clear the mechanism of the osteoporosis. Until today many specimen preparation methods for SEM have been reported. They are roughly classified into two; the anorganic preparation and the simple preparation. The former is suitable for observing mineralization, but has the demerit that the real surface of the bone can not be observed and, moreover, the samples prepared by this method are extremely fragile especially in the case of osteoporosis. On the other hand, the latter has the merit that the real information of the bone surface can be obtained, though it is difficult to recognize the functional situation of the bone.

Comparison of Magnetostrictive Performance Loss of Particulate Tb0.3 Dy0.7 Fe2 Epoxy Composites Prepared with Different Matrix Polymers M. Shanmugham et al.: Comparison of Magnetostrictive Performance Loss of Particulate Tb0.3 Dy0.7 Fe2 Epoxy Composites

2004 ◽  
Vol 19 (3) ◽  
pp. 795-805 ◽  
Author(s):  
Manikantan Shanmugham ◽  
Harold Bailey ◽  
William D. Armstrong
Keyword(s):  
Magnetic Field ◽  
Glass Transition ◽  
Matrix Material ◽  
Epoxy Composites ◽  
Particulate Composites ◽  
Specimen Preparation ◽  
Performance Loss ◽  
Magnetostrictive Strain ◽  
Relative Damage ◽  
Low Modulus

Particulate composites of magnetostrictive Terfenol-D were prepared with polyamine and anhydride cured epoxy polymer matrices with the presence or the absence of a strong magnetic field. These composites were studied to investigate (i) the influence of magnetic field that is applied during specimen preparation in strain output levels, (ii) performance loss at high temperatures, and (iii) the influence of matrix material in magnetostrictive strain performance. A six-way comparison is made of materials processed under magnetic field with materials processed under no magnetic field, and magnetostrictive strain performance at glass transition finish temperature with magnetostrictive strain performance at glass transition start temperature, and magnetostrictive strain performance in low modulus matrix systems with magnetostrictive strain performance in high modulus matrix systems. A four-way comparison is also made between the micrographs for strain-cycled and non-strain-cycled samples and relative damage incurred by samples prepared using high and low modulus matrix systems.

scholarly journals Clarification of the Magnetocapacitance Mechanism for Fe3O4-PDMS Nanocomposites

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Chen Guobin ◽  
Yang Hui ◽  
Zhang Xiaoming ◽  
Liu Jun ◽  
Tang Jun
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Magnetic Property ◽  
Preparation Method ◽  
Volume Fraction ◽  
Magnetic Interaction ◽  
Mechanical Parameters ◽  
Measurement Results

We mainly focused on the magnetocapacitance effect of Fe3O4-PDMS nanocomposites. We also proposed the preparation method and measured microstructures, magnetic properties, and magnetocapacitance value of the nanocomposites. The magnetocapacitance measurement results show that the nanocomposites have magnetocapacitance property, the magnetocapacitance with magnetic field depends on the magnetic property, and the value at the same magnetic field is increasing with the volume fraction of Fe3O4nanoparticles. The magnetocapacitance model is proposed to explain this phenomenon by analyzing the magnetic interaction between particles and the viscoelasticity of PDMS. We also calculated the theoretical capacitance value of all samples using the magnetization of nanoparticles and mechanical parameters of PDMS. From the theoretical values, it is concluded that the model we proposed can well explain the magnetocapacitance effect of Fe3O4-PDMS nanocomposites.

scholarly journals A New Specimen Preparation Method for Three-Dimensional Atom Probe

2010 ◽  
Vol 8 ◽  
pp. 141-144 ◽  
Author(s):  
Y. Hanaoka ◽  
S. Mikami ◽  
N. Mayama ◽  
T. Iwata ◽  
Y. Kajiwara ◽  
...  
Keyword(s):  
Preparation Method ◽  
Three Dimensional ◽  
Atom Probe ◽  
Specimen Preparation

A model for the composite nanostructure of bone suggested by high-resolution transmission electron microscopy

2003 ◽  
Vol 67 (6) ◽  
pp. 1171-1182 ◽  
Author(s):  
B. A. Cressey ◽  
G. Cressey
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Preparation Method ◽  
Ion Beam ◽  
Human Bone ◽  
Specimen Preparation ◽  
Transmission Electron ◽  
Ancient Bone ◽  
Close Analogue

AbstractWe have imaged the spatially-preserved microtexture of biogenic apatite, retained together with its collagen template, in non-demineralized human bone using high-resolution transmission electron microscopy. Using ion-beam thinning, a specimen preparation method generally employed for inorganic minerals rather than for biological materials, we have imaged a composite nanostructure of bone not previously reported, and we propose a model for this nano-architecture that involves a boxconstruction of apatite plates and apatite sheets. This observation provides a new understanding of bone strength at the nanometre scale and suggests how post mortem enhancement of this texture by recrystallization probably accounts for the durability of ancient bone. Modern sheep bone (a close analogue for recently dead human bone) imaged in the same way also shows evidence of this composite architecture.

scholarly journals Simple Specimen Preparation Method for In Situ Heating Experiments

2016 ◽  
Vol 22 (S3) ◽  
pp. 132-133 ◽  
Author(s):  
Qingxiao Wang ◽  
Jinguo Wang ◽  
Moon J. Kim
Keyword(s):  
Preparation Method ◽  
Specimen Preparation ◽  
In Situ Heating

scholarly journals Coordination chemistry of Ca sites at the surface of nanosized hydroxyapatite: interaction with H 2 O and CO

2012 ◽  
Vol 370 (1963) ◽  
pp. 1313-1336 ◽  
Author(s):  
Vera Bolis ◽  
Claudia Busco ◽  
Gianmario Martra ◽  
Luca Bertinetti ◽  
Yuriy Sakhno ◽  
...  
Keyword(s):  
Preparation Method ◽  
Co Adsorption ◽  
Specimen Preparation ◽  
High Coverage ◽  
Mild Conditions ◽  
Specific Effects ◽  
Vapour Adsorption ◽  
Co Probe ◽  
Ir Spectroscopic ◽  
Selection Of

The affinity towards water of a selection of well-defined, nanostructured hydroxyapatite (HA) samples was investigated by H 2 O vapour adsorption microcalorimetry and infrared (IR) spectroscopy. A large hydrophilicity of all investigated materials was confirmed. The surface features of hydrated HA were investigated on the as-synthesized samples pre-treated in mild conditions at T =303 K, whereas dehydrated HA features were characterized on samples activated at T =573 K. The relatively large hydrophilicity of the hydrated surface (−Δ ads H∼100–50 kJ mol −1 ) was due to the interaction of water with the highly polarized H 2 O molecules strongly coordinated to the surface Ca 2+ cations. At the dehydrated surface, exposing coordinatively unsaturated ( cus ) Ca 2+ cations, H 2 O was still molecularly adsorbed but more strongly (−Δ ads H∼120–90 kJ mol −1 ). The use of CO adsorption to quantify the Lewis acidic strength of HA surface sites revealed only a moderate strength of cus Ca 2+ cations, as confirmed by both microcalorimetric and IR spectroscopic measurements and ab initio calculations. This result implies that the large HA/H 2 O interaction energy is due to the interplay between cus Ca 2+ sites and nearby hydrophilic PO 4 groups, not revealed by the CO probe. The lower density of cus Ca 2+ cations at the 573 K activated HA surface with respect to the pristine one did not affect the whole hydrophilicity of the surface, as the polarizing effect of Ca sites is so strong to extend up to the fourth hydrated layer, as confirmed by both high-coverage microcalorimetric and IR spectroscopic data. No specific effects due to the investigated specimen preparation method and/or different morphology were observed.

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