• Korean Journal of Crystallography
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• v.10 no.1
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• pp.33-38
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• 1999

The complex [Ni(L2)(H2O)]Cl·H2O (1) (L2=3,14-dimethyl-2,6,13,17-tetraazartricyclo [14,4,01.18,07.12]docosane-N-acetic acid) has been synthesized and characterized by X-ray crystallography. 1 crystallizes in the triclinic system, space group P, with a=11.274(1), b=13.851(1), c=17.159(6) , α=90.24(2), β=101.10(2), γ=92.11(1)o V=2682.5(11) 3, Z=4, R1=0.042 and wR2=0.111 for 9432 observed reflections with [I>2σ(I)]. The central nicke(II) ion is six-coordinated octahedral geometry with bonds to the four amine nitrogen atoms the carboxylic oxygen atom of the macrocyclic ligand and to the water molecule occupying a position trans to the pendant arm.

• Smart Media Journal
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• v.5 no.4
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• pp.103-110
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• 2016

This study aims to establish the standards to give the design weight in case when developing equipment designs, by classifying products with similar purposes in accordance with the morphological characteristics and also extracting the typicality. Limiting the sampling group for the extraction of the typicality to a pendant-type and a ceiling buried-type through the preceding case study and consultation with experts, the survey was conducted for majors and relevant workers in six cities, sampling products released in Korea and Japan before May 2016. The 1st survey was about the Morphological classification, and the 2nd times about the extraction of the typicality while the 3rd one was about the classification of the morphological attributes. By drawing the design attributes based on the functional/morphological classification and formative principles, it aimed to establish the base of the future research on the measurement of design weight. The results of this study aim to efficiently establish the roles of design technology in accordance with changes in the lighting fixture market caused by the substitution of light sources, and also to draw the development direction to rapidly cope with the accelerated changes in lighting design types and corporate R&D.

• Polymer(Korea)
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• v.32 no.1
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• pp.77-84
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• 2008

The thermal properties, morphology, mechanical properties and gas permeability of the blends of poly (amic acid) (PAA) and poly (o-hydroxyamides) (PHAs) having pendant group was investigated. The 5% weight loss and major weight loss of the b)ends occurred in the ranges of $348{\sim}407^{\circ}C$ and $589{\sim}615^{\circ}C$ upon a heating process. After a thermical annealing, the tensile strength and initial modulus of blends increased $3.7{\sim}52.9%$ and $34.4{\sim}70%$ from the value of pure PAA, respectively. Especially the tensile strength and modulus of the PAA/MP-PHA=9/1 showed the highest values (97.5 MPa and 2.67 GPa, respectively), which were 53 and 70% higher than those of pure PAA. The fine PHA domains were found to be uniformly dispersed. The interfacial adhesion between PAA and PHA was identified to be good. The gas permeabilities of PAA/M-PHA blend increased with M-PHA contents.

• Polymer(Korea)
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• v.29 no.5
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• pp.518-521
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• 2005

Biodegradable polymers and hydrogels have been increasingly applied in a variety of biomedical applications including current drug delivery system and tissue engineering field. ${\alpha},\;{\beta}-Poly$(N-2-hydroxyethyl-DL-aspart-amide), PHEA. is one of poly(amino acids) with hydroxyethyl pendants, which is hewn to be biodegradable and potentially biocompatible. So that, the utilization and various chemical modifications of PHEA have been attempted for useful biomedical applications. In this wort chemical gels based on PHEA were prepared by crosslinking with diisocyanate compound in DMF in the presence of catalyst. Here, the PHEA was prepared from polysuccinimde, the thermal polycondensation product of aspartic acid, via ring-opening reaction with ethanolamine. The preparation of gels and their swelling behavior, depending on the different medium and pH, were investigated. Also the morphology by SEM and simple hydrolytic degradation were observed.