Inorganic–Organic Calcium Carbonate Composite of Synthetic Polymer Ligands with an Intramolecular NH···O Hydrogen Bond

2006 ◽  
pp. 155-193 ◽  
Author(s):  
Norikazu Ueyama ◽  
Kazuyuki Takahashi ◽  
Akira Onoda ◽  
Taka-aki Okamura ◽  
Hitoshi Yamamoto
Keyword(s):  
Hydrogen Bond ◽  
Calcium Carbonate ◽  
Synthetic Polymer ◽  
Polymer Ligands

Secure Binding of Alternately Amidated Poly(acrylate) to Crystalline Calcium Carbonate by NH···O Hydrogen Bond

2001 ◽  
Vol 34 (8) ◽  
pp. 2607-2614 ◽  
Author(s):  
Norikazu Ueyama ◽  
Hidekazu Kozuki ◽  
Mototsugu Doi ◽  
Yusuke Yamada ◽  
Kazuyuki Takahashi ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Calcium Carbonate

Tight binding of poly(carboxylate) ligand to calcium carbonate with intramolecular NH…O hydrogen bond

2002 ◽  
Vol 186 (1) ◽  
pp. 129-134 ◽  
Author(s):  
Norizaki Ueyama ◽  
Kazuyuki Takahasi ◽  
Akira Onoda ◽  
Taka-aki Okamura ◽  
Hitoshi Yamamoto
Keyword(s):  
Hydrogen Bond ◽  
Calcium Carbonate ◽  
Tight Binding ◽  
Carboxylate Ligand

scholarly journals Minimization of Synthetic Polymer Ligands for Specific Recognition and Neutralization of a Toxic Peptide

2015 ◽  
Vol 137 (34) ◽  
pp. 10878-10881 ◽  
Author(s):  
Haejoo Lee ◽  
Yu Hoshino ◽  
Yusuke Wada ◽  
Yuka Arata ◽  
Atsushi Maruyama ◽  
...  
Keyword(s):  
Synthetic Polymer ◽  
Specific Recognition ◽  
Polymer Ligands

Coordination behavior of cyanide ion to hemin uncomplexed and complexed with several synthetic polymer ligands

1985 ◽  
Vol 30 (8) ◽  
pp. 3143-3151
Author(s):  
Etsuo Kokufuta ◽  
Hiroshi Watanabe ◽  
Kiyoshi Saito ◽  
Isei Nakamura
Keyword(s):  
Synthetic Polymer ◽  
Cyanide Ion ◽  
Coordination Behavior ◽  
Polymer Ligands

Electron-diffraction studies in synthetic polymer materials

1983 ◽  
Vol 41 ◽  
pp. 362-365
Author(s):  
D.T. Grubb
Keyword(s):  
Electron Diffraction ◽  
Synthetic Polymer ◽  
Polymer Materials ◽  
Crystallographic Structure ◽  
High Dose ◽  
Electron Dose ◽  
Dose Rates ◽  
First Case ◽  
Diffraction Patterns ◽  
The Many

Diffraction studies in polymeric and other beam sensitive materials may bring to mind the many experiments where diffracted intensity has been used as a measure of the electron dose required to destroy fine structure in the TEM. But this paper is concerned with a range of cases where the diffraction pattern itself contains the important information.In the first case, electron diffraction from paraffins, degraded polyethylene and polyethylene single crystals, all the samples are highly ordered, and their crystallographic structure is well known. The diffraction patterns fade on irradiation and may also change considerably in a-spacing, increasing the unit cell volume on irradiation. The effect is large and continuous far C94H190 paraffin and for PE, while for shorter chains to C 28H58 the change is less, levelling off at high dose, Fig.l. It is also found that the change in a-spacing increases at higher dose rates and at higher irradiation temperatures.

A TEM study of the microstructure of avian eggshells

1992 ◽  
Vol 50 (2) ◽  
pp. 1102-1103
Author(s):  
S. Q. Xiao ◽  
S. Baden ◽  
A. H. Heuer
Keyword(s):  
Electron Microscope ◽  
Calcium Carbonate ◽  
Nucleation And Growth ◽  
Growth Mechanisms ◽  
Shell Surface ◽  
Thin Sections ◽  
Polycrystalline Metals ◽  
Transmission Electron ◽  
Nucleation And Growth Mechanisms

The avian eggshell is one of the most rapidly mineralizing biological systems known. In situ, 5g of calcium carbonate are crystallized in less than 20 hrs to fabricate the shell. Although there have been much work about the formation of eggshells, controversy about the nucleation and growth mechanisms of the calcite crystals, and their texture in the eggshell, still remain unclear. In this report the microstructure and microchemistry of avian eggshells have been analyzed using transmission electron microscope (TEM) and energy dispersive spectroscopy (EDS).Fresh white and dry brown eggshells were broken and fixed in Karnosky's fixative (kaltitanden) for 2 hrs, then rinsed in distilled H2O. Small speckles of the eggshells were embedded in Spurr medium and thin sections were made ultramicrotome.The crystalline part of eggshells are composed of many small plate-like calcite grains, whose plate normals are approximately parallel to the shell surface. The sizes of the grains are about 0.3×0.3×1 μm3 (Fig.l). These grains are not as closely packed as man-made polycrystalline metals and ceramics, and small gaps between adjacent grains are visible indicating the absence of conventional grain boundaries.

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