• Applied Biological Chemistry
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• 제20권1호
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• pp.10-25
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• 1977

The photobiological receptors of phototactic, phototropic, and photomorphogenic responses of various organisms have been described in terms of spectroscopic, photophysical and photochemical properties which may be relevant in elucidating the energy transduct ion mechanism(s) in photobiology. The photoreceptors discussed include carotenoids, flavins, stentorin and phytochrome. Although the molecular modes of their photobiological action still remain largely unexplained, it is possible to suggest several primary molecul ar processes of the photoreceptors in eliciting responses of various organisms to light.

• Applied Biological Chemistry
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• 제20권1호
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• pp.156-170
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• 1977

Some of the recent developments and studies in the area of rice protein are reviewed. Protein content and amino acid composition of rice are briefly described. Emphasis is given to characterization of rice protein fractions, effects of protein content on grain properties and lysine content of rice, occurence of protein in rice grain and biosynthesis of protein during grain development.

• 한국생물물리학회:학술대회논문집
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• 한국생물물리학회 1996년도 정기총회 및 학술발표회
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• pp.25-25
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• 1996

A mature mutant ribose binding protein (RBP) of Escherichia coli was obtained by site-directed mutagenesis, replacing Thr-3 in the N-domain of wild-type mature RBP (WT -mRBP) with a Trp residue (N- Trp-mRBP). The equilibrium unfolding properties and the refolding kinetics of this protein were monitored by fluorescence and circular dichroism (CD). (omitted)

• 한국생물물리학회:학술대회논문집
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• 한국생물물리학회 1996년도 정기총회 및 학술발표회
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• pp.27-27
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• 1996

SecA protein which has a pivotal role in the preprotein cranslocation across the inner membrane of Escherichia coli is a water-soluble protein with an unusual property of penetrating the membrane readily. An interesting and important question is what structural characteristics of SecA enables its ready penetration of lipid bilayer. The conformational properties of SecA in solution at 3$0^{\circ}C$, pH 7.5 were observed by hydrogen-tritium (HT) exchange, and denaturant-induced denaturation/renaturation and thermal unfolding. (omitted)

• 대한의용생체공학회:의공학회지
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• 제15권3호
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• pp.341-346
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• 1994

To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed a composite that is consisted of calcium phosphate and collagen. To use as the structural matrix of the composite, collagen was purified from human umbilical cord. The obtained collagen was treated by pepsin to remove telopeptides, and finally, the immune-free atel- ocollagen was produced. The cross linked atelocollagen was highly resistant to the collagenase induced collagenolysis. The cross linked collagen demonstrated an improved tensile strength.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2003년도 심포지엄
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• pp.1-8
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• 2003

Poisonous mushrooms have attracted much attention of scientists because of the unique chemical structures and the remarkable biological properties of their toxic components. A wide range of compounds has been characterized as toxic principles, and some of them have widened the horizons of chemical and biological research. Therefore, poisonous mushrooms can serve for a resource of biomedical application. We will describe the recent progress of such aspect of poisonous mushrooms.

• Journal of Applied Biological Chemistry
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• 제64권3호
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• pp.213-216
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• 2021

A gene encoding thermostable cellulase A (TmCelA) was isolated from Thermotoga maritima. The open reading frame of TmCelA gene was 774 bp long which predicted to encode 257 amino acid residues with a molecular weight of 29,732 Da. To examine the biochemical properties, the TmCelA was overexpressed in E. coli BL21, and expressed protein was purified. The optimum temperature of recombinant TmCelA was 90-95 ℃, and the optimum pH of recombinant TmCelA was approximately pH 5.0. Recombinant TmCelA was stable at temperature below 90 ℃.

• Journal of Biosystems Engineering
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• 제24권3호
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• pp.243-252
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• 1999

The damage caused in the processes and distributions after harvesting the fruits and vegetables is attributed to the mechanical factors such as compressive and impact forces. Compression tests of biological materials provide an objective method for determining the apparent modulus of elasticity and mechanical properties which are significant in quality evaluation and control, and them maximum allowable compressive forces for minimizing mechanical damage. This study was performed to determine the mechanical properties of apple and pear, and to investigate effect of specimen shapes on the mechanical properties of them. A computer program was developed for measuring the mechanical properties and analyzing the data obtained from the measurement. Compression tests on the sample were performed with then replications at each treatment and at 25 mm/min loading rate. Mechanical properties of the apple was generally shown the higher value than those of the pear, and it was though that data obtained form the cylindrical specimen removed from the sample was more reliable than from the specimen cut in half.

• 폴리머
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• 제39권1호
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• pp.114-121
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• 2015

탄소나노튜브의 불순물을 제거하고 에폭시 수지와의 계면접착력 향상과 에폭시 내 탄소나노튜브의 분산성 증가를 위하여 불산(hydrofluoric acid)으로 그 표면을 개질하였다. 표면 처리된 탄소나노튜브의 결정성은 광전자 분광기(X-ray photoelectron spectroscopy)와 라만 분광기(Raman spectroscopy)를 통해 분석하였고, 인장시험으로 기계적 강도 분석을 실시하였다. 표면 처리된 탄소나노튜브/에폭시 복합재의 인장강도는 미처리 탄소나노튜브/에폭시 복합재와 비교하여 최대 약 33% 향상됨을 확인할 수 있었고, 탄소나노튜브/에폭시 복합재의 전자파차폐 특성은 탄소나노튜브의 불산처리 농도에 따라 증가하는 경향을 보였고 25%의 농도로 처리되었을 때, 최대 전자파차폐 특성을 보였다. 그러나 기계적 특성 및 전자파차폐 특성은 50% 이상의 불산 농도로 처리된 탄소나노튜브/에폭시 복합재에서 오히려 감소하였으며 이는 높은 농도의 불산으로 인하여 탄소나노튜브의 표면 결정성 감소 및 고유 특성에 영향을 미친 것으로 파악된다. 고분자 복합재의 기계적, 전기적 특성 향상은 불산 처리로 인한 탄소나노튜브의 결정성 향상과 에폭시 수지 내에 분산성의 증가에 기인하였다.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2007년도 학술발표회 논문집
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• pp.19-22
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• 2007