• Applied Biological Chemistry
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• 제4권
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• pp.17-22
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• 1963

원료배합(原料配合)을 다리한 간장용(用) 고일(一)지의 제국중(製麴中)에 있어서와 건조(乾燥)고일(一)지의 각종효소(各種酵素) activity 및 성분(成分)의 변화(變化)를 측정(測定)하여 다음결과(結果)를 얻었다. 1. 건조(乾燥)고일(一)지는 중성부근(中性附近)(pH 6.0)에 활성(活性)을 갖는 Protease가 주체(主體)를 이루며 산성(酸性) 및 alkali성측(性側)의 Protease activity는 이보다 미약(微弱)하고 밀을 많이 배합(配合)한 구(區)일수록 산성(酸性) 및 중성측(中性側) Protease activity가 높아지는 반면(反面)에 alkali성측(性側)은 이와 반대(反對)되는 경향(傾向)을 보였다. 2. 제국중(製麴中) 각종효소(各種酵素) activity는 모두 증가(增加)되었고 밀이 많은 배합구(配合區)일수록 ${\alpha}-Amylase$는 그 activity가 높아졌다. 3. 제국중(製麴中) 전당(全糖)은 감소(減少)되었으나 직당(直糖) 및 아미노 태질소(態窒素)와 전질소(全窒素)는 증가(增加)되었다. 4. 건조(乾燥)고일(一)지에 있어서 밀이 많은 배합구(配合區)일수록 직당(直糖) 및 전당(全糖)의 함량(含量)이 많어졌으나 전질소(全窒素)는 적어졌고 아미노(態窒素)는 차이(差異)가 없었다.

• 대한의생명과학회지
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• 제17권2호
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• pp.157-165
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• 2011

In this study, we investigated the biological activities of Carthamus tinctorius including antioxidative, fibrinolytic, thrombin inhibitory, ${\alpha}$-glucosidase inhibitory and collagenase inhibitory activities. Carthamus tinctorius, hot water extract was fractionated into hexane, chloroform, ethyl acetate, butanol and water fraction. Each of these was assayed individually. The hot water extract showed high antioxidative activity and thrombin inhibitory activity at 90.17% and 97.10% respectively. In the fraction activity tests, chloroform fraction showed the highest antioxidative activity at 81.85%. The fibrinolytic activity was strong only in the butanol fraction at 0.70 plasmin units/ml. The thrombin inhibitory activities of hexane, ethyl acetate and butanol fractions were 97.35%, 86.74% and 93.18% respectively. In collagenase inhibitory activity test, hexane fraction showed the highest activity at 87.78%. In conclusion, the hot water extract and solvent fractions of Carthamus tinctorius L can be used as a material for the development of biofunctional tea and foods respectively.

• 한국조리학회지
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• 제23권5호
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• pp.151-158
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• 2017

In this study, the Rhus chinensis Mill was divided into bark and inner bark. The antimicrobial activity and the antioxidative activity of the extracts were investigated by using the organic solvent fractions after the extraction and concentration with ethanol. This study showed the possibility of functional materials such as raw materials for cosmetics and food supplements. This study was the antimicrobial activity and antioxidant activity of five microorganisms (S. aureus, E. coli, B. subtilis, P. aeruginosa, and P. ovale). The following conclusions were obtained. First, the antimicrobial activity of B. subtilis was found to be high in the ethanol extract of. Second, DPPH scavenging activity was 86.4% free radical scavenging activity at 2.5 mg/mL bark part and 61.9% free radical scavenging activity at 2.5 mg/mL in inner Rhus chinensis Mill bark part. The ABTS scavenging activity was 79.2% free radical scavenging at 1 mg/mL bark fraction and 63% free radical scavenging activity at 1 mg/mL in inner bark, and bark showed higher antioxidant activity than inner bark. These results suggested that the antimicrobial activity and antioxidant activity of Rhus chinensis Mill extract can be used as a natural material. Specific and diverse physiological activity studies are expected in the future.

• Journal of Microbiology and Biotechnology
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• 제15권3호
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• pp.646-651
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• 2005

The growth responses of Ruta chalepensis leaf-derived materials toward human intestinal bacteria were examined. The biologically active constituent of the R. chalepensis extract was characterized as quinoline-4-carboxaldehyde($C_{10}H_{7}NO$). The growth responses varied depending on the bacterial strain, chemicals, and dose tested. At 0.25 and 0.1 mg/disk, quinoline-4-carboxaldehyde strongly inhibited the growth of Clostridium perfringens and weakly inhibited the growth of Escherichia coli without any adverse effects on the growth of three lactic acid bacteria. Furthermore, at 0.05 and 0.025 mg/disk, this isolate showed moderate activity against C. perfringens. In comparison, chloramphenicol at as low as 0.01 mg/disk significantly inhibited the growth of all bacteria tested, and cinnamaldehyde at 0.25 mg/disk did not inhibit Bifidobacterium bifidum, B. longum, E. coli, and Lactobacillus acidophilus, with the exception of C. perfringens. The structure-activity relationship revealed that quinoline-3-carboxaldehyde had strong growth inhibition against C. perfringens, but quinoline, quinoline-3-carboxylic acid, and quinoline-4-carboxylic acid did not inhibit the growth of B. bifidum, B. longum, C. perfringens, E. coli, and L. acidophilus. These results indicate that the carboxyl aldehyde functional group of quinolines seems to be required for growth-inhibiting activity against C. perfringens, thus indicating at least one of the pharmacological actions of R. chalepensis leaf.

• 한국수학교육학회지시리즈A:수학교육
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• 제40권1호
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• pp.53-66
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• 2001

The purpose of this work is to activate mathematics class in the extra curricular activity under the 7th curriculum. For that purpose, we investigate the current management of the extra curricular activity in the secondary school mathematics, and analysis the result. We suggest the main counterplan to activate mathematics class of extra curricular activity as following; (1) Develope teaching materials and programs for mathematics class. (2) Get the mathematics laboratory.

• 대한수학교육학회지:수학교육학연구
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• 제12권3호
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• pp.331-351
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• 2002

It is widely recommended that teachers should actively mediate students' engagement with tools such as manipulative materials. This paper is to help to parse classroom life so that both social and psychological aspects are accounted for and coordinated. Building on the theory of affordances from ecological psychology and the activity theory from sociocultural perspectives, the main strategy of this paper is to view manipulative materials as simultaneously participating in social and psychological activity systems. Within these activity systems it is charted how both mathematical affordances related to the structure of mathematical concepts and ecological affordances related to socially situated classroom practices need to be considered by teachers in effective mediation of mathematical manipulatives. This paper has three major sections. The first section develops a theoretical extension of Gibson's theory of affordances from natural to social environments. The second section introduces mathematical and ecological affordances using empirical data from a grade two elementary school classroom. The third section illustrates the need of coordinating the two affordances as embedded in different activity systems.

• KSBB Journal
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• 제29권3호
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• pp.199-204
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• 2014

To investigate the effect of Plantago asiatica L. Root extract on skin care, we measured anti-oxidant activity and whitening action. As a result of measuring DPPH radical scavenging activity to examine independent anti-oxidation of PRE, there was slight scavenging activity. Fluorescent materials DHE, DCF-DA and DHR were each used to measure superoxide anion, hydrogen peroxide, and hydroperoxide created in RAW 264.7 cells, all concentrations were found to dependently prevent ROS production. Tyrosinase activation was found to be blocked dose-dependant. Melanin production was also prevented dose-dependant, but the effects were slight. Therefore, it is expected to be used effectively in development of functional cosmetic materials.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2000년도 춘계수산관련학회 공동학술대회발표요지집
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• pp.416-417
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• 2000

Chitin, a poly $\beta$-(1longrightarrow14)-N-acetyl-D-glucosamine, is best known as a cell wall component of fungi and as a skeletal materials of invertebrates. Chitosan is derived from chitin by deacetylation in the presence of alkali. Chitosan has been developed as new physiological materials since it possesses antibacterial activity, hypocholesterolemic activity and antihypertensive action. However, the actions of chitosan in vivo still remain ambiguous as the physiological functional properties because most animal intestines, especially the human gastrointestinal tract, do not possess enzyme such as chitosanase which directly degrade the $\beta$-glucosidic linkage in chitosan, and consequently the unbroken polymers may be poorly absorbed into the human intestine. Therefore, recent studies as chitosan have attracted interest for chitosan oligosaccharides, because the oligosaccharides process not only water-soluble property but also versatile functional properties such as antitumor activity, immune-enhancing effects, enhancement of protective effects against infection with some pathogens in mice and antimicrobial activity (Kingsnorth et al., 1983, Mori et al., 1997). (omitted)

• 한국분말재료학회지
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• 제27권1호
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• pp.63-71
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• 2020

It is necessary to fabricate uniformly dispersed nanoscale catalyst materials with high activity and long-term stability for polymer electrolyte membrane fuel cells with excellent electrochemical characteristics of the oxygen reduction reaction and hydrogen oxidation reaction. Platinum is known as the best noble metal catalyst for polymer electrolyte membrane fuel cells because of its excellent catalytic activity. However, given that Pt is expensive, considerable efforts have been made to reduce the amount of Pt loading for both anode and cathode catalysts. Meanwhile, the atomic layer deposition (ALD) method shows excellent uniformity and precise particle size controllability over the three-dimensional structure. The research progress on noble metal ALD, such as Pt, Ru, Pd, and various metal alloys, is presented in this review. ALD technology enables the development of polymer electrolyte membrane fuel cells with excellent reactivity and durability.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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• pp.1116-1117
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• 2006

Lanthanide tantalite $LnTaO_4$ (Ln= La, Nd, Sm, Dy, Er and Tm) was synthesized by a solid state reaction between mixed powders of $Ln_2O_3$ and $Ta_2O_5$. The single-phase $LnTaO_4$ was prepared by sintering at temperatures of 1423-1673 K in air. The SEM observation showed that the particles were provided with the growth steps and the depeloped facets. The photocatalytic activity for water splitting of $LnTaO_4$ prepared was measured under UV light irradiation. The activity obtained was higher than that previously reported. These results suggested the crystallinity of $LnTaO_4$ photocatalysts correlates closely with the efficiency of water splitting.