• 폴리머
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• 제39권1호
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• pp.169-173
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• 2015

3-Aminopropyltrimethoxysilane(1NS) 또는 N-[3-(trimethoxysilyl)propyl]ethylenediamine(2NS)으로 표면 기능화된 실리카에 1-butyl-4-methylpyridinium chloride(Cl)와 tributylmethylammonium chloride(Amm), benzyldimethyltetradecylammonium chloride(Ben), 1-butyl-1-methylpyrrolidinium chloride(Pyr)와 같은 이온성 액체를 이용하여 표면처리한 후 메탈로센 촉매를 담지하여 에틸렌 중합을 실시하였다. $SiO_2/1NS/IL/(n-BuCp)_2ZrCl_2$ 촉매와 $SiO_2/2NS/IL/(n-BuCp)_2ZrCl_2$ 촉매의 Zr 함량은 아미노실란 화합물로만 표면 처리된 촉매보다 감소하였다. $SiO_2/1NS/IL/(n-BuCp)_2ZrCl_2$ 촉매의 중합 활성은 $SiO_2/1NS/(n-BuCp)_2ZrCl_2$ 촉매보다 증가하였다. 반면, $SiO_2/2NS/IL/(n-BuCp)_2ZrCl_2$은 Zr 함량의 감소로 중합 활성은 $SiO_2/2NS/(n-BuCp)_2ZrCl_2$ 촉매에 비해 감소하였다.

• 한국주조공학회지
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• 제11권1호
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• pp.71-78
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• 1991

Microstructure and characteristics of the SiCp/Al-4.5wt%Cu-1wt%Mg composites fabricated by the combination of the compocasting and the pressurized continuous casting process, which is one of the processes to decrease the limitations of the size, and shops of the products, are investigated. The main results are as follows: 1) the SiCp/Al alloy matrix composites can be made continuously 2) as the amount of SiCp addition increases; (1) the degree of directional solidification of matrix structure decreases, and that of SiCp dispersion improves, (2) wear resistance improves, and especially these composites show the excellent wear resistance under the high sliding speed and high final load condition, (3) wear mechanism of these composites is changed from adhesive wear into abrasive wear, and the tendency of that becomes outstanding with increasing sliding speed.

• 미생물학회지
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• 제23권2호
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• pp.115-121
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• 1985

Lactobacillus casei에 감염하는 독성 phage중 각 분류꾼을 대표하는 5종의 phage (J1, TK93, K1, PD 5 빛 CP 1)와 l 종의 용원 phage (${\phi}$ 1043) 의 핵산의 특성을 바교 검토하였다. 실험한 6 종의 phage는 모두 double S stranded DNA를 갖고 있였으며 J1. TK93, K1 및 ${\phi}$ 1043 DNA의 크기는 약 42Kb, PD5 와 CP1 DNA는 140K Kb정도로 서로 비슷하였다. EcoR 1으로 절단시 J1, TK93, K1, PD5, CP1 및 ${\phi}$1043은 각각 13, 13. 11, 14, 14와 12개의 절편을 갖는 특징적인 절단양식을 보여주었다. J1, TK93 및 ${\phi}$ 1043 DNA에는 cohesive end가 존재 하였고 K1, PD5 빛 CP1 DNA에는 없는 것으로 사료되었다. J1과 TK93 DNA의 제한효소 지도를 작성하여 비교 검토하였으며 이상의 결과로부터 진화적 유연관계를 검토하였다.

• 동아시아식생활학회지
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• 제20권5호
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• pp.697-705
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• 2010

This study was designed to investigate the effect of cranberry powder making pan bread. Cranberry powder at the level of 1 % (CP1), 3% (CP3), and 5% (CP5) was mixed with flour to make the breads. According to mixograph, the control, CP1 and CP3 except CP5 were found to bo proper between 3 and 5 min. in tenn of peak time (min). All samples for peak value were at the level of over 60% It meant that all samples were proper to make bread. By increasing the ratio of cranberry powder, pH, dough fermentation rate, volume and specific volume were decreased, and adhesiveness, springiness, cohesiveness and resilience except hardness were decreased in texture profile analysis. In crumbScan analysis, the addition of cranberry powder decreased the volume and increased crumb fineness of pan bread. In sensory evaluation, CP1 and CP3 showed good preference in aspect of flavor, taste, and overall acceptance.

• 한국축산식품학회지
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• 제43권5호
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• pp.859-876
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• 2023

It is known that animal-origin medicine could be one of effective treatment to remedy atopic dermatitis (AD) by controlling the cytokines. Cicadidae Periostracum (CP), the slough of Cryptotympana pustulata, has been frequently used for treating AD and skin affliction in traditional Korean Medicine. This study is aimed at investigating the ameliorating effects of CP on AD and its potential mechanism. The dinitrochlorobenzene sensitized mice were treated with CP for 2 weeks. The various biomarkers and the dermatitis scores presented that CP treatment can induce the visual and biological improvements of AD model. Pruritus, the most serious symptom of AD, which can cause repeated scratching behaviors and finally lead to lichenification, was reduced with CP treatment by regulating the inflammatory reactions. In addition, CP treatment diminished the number of mast cells that are known for causing inflammatory reactions. Moreover, it is proven that CP can decline secretion of interleukin-22, which means CP treatment has anti-inflammatory effects. CP treatment can correct the imbalance of helper T (Th)1 and Th2, downregulating thymic stromal lymphopoietin that leads to decrease of mRNA level of inflammatory cytokines. The crucial role of CP treatment is controlling of the Janus kinase 1/signal transducer and activator of transcription 3 pathway. In addition, CP treatment has the inhibitory effects on kallikrein related peptidase (KLK) 5 and KLK7. Taken together, CP treatment can ameliorate most symptoms and problems caused by AD disease, improving the AD patients' life quality.

• 한국자기공명학회논문지
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• 제12권1호
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• pp.60-64
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• 2008

Cross-polarization (CP) signals were observed even from liquid samples such as neat toluene. Therefore, CP signals of liquid molecules in the presence of high surface materials do not necessarily mean the molecules are adsorbed on solid surface, especially when no signal from the tertiary observing nuclei such as carbons of the molecules is detected.

• Asian-Australasian Journal of Animal Sciences
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• 제24권11호
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• pp.1623-1628
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• 2011

The effects of dietary lysine (Lys) at a fixed ratio to crude protein (CP) and essential amino acids (EAA) on early growth response of broilers were studied. Four diets were formulated to contain similar metabolizable energy (ME, 2,950 kcal/kg) but contained graded levels of incremental Lys (1.1, 1.2, 1.3 and 1.4%) while also increasing the dietary CP and EAA (methionine, methionine+ cystine, threonine and tryptophan) to maintain a constant ratio with Lys. Each diet was fed at random to 10 replicates of 6 chicks each throughout the experimental period (1-21 d). At the lowest concentration of Lys of 1.1% (19.04% CP), body weight gain (BWG) was lowest and feed conversion ratio (FCR) was poorest. The BWG increased and FCR decreased linearly as dietary Lys increased upto 1.3% (22.5% CP). Lowest feed consumption was observed in the dietary group that contained 1.1% Lys (19.04% CP) in the diet. Increasing the concentration of Lys to 1.2% (20.77% CP), significantly increased the feed consumption. The concentrations of protein, calcium, phosphorus and cholesterol in serum were not influenced by the variation in Lys contents in the diet. The humoral immune response as measured by antibody titre in response to SRBC inoculation was significantly lower in the diets containing 1.1% Lys compared to 1.4%. It is concluded that the Lys requirement of broilers is 1.3% (22.5% CP) during 0 to 21 days of age for eliciting optimum performance when a fixed ratio of Lys to CP (1:17.31) and essential AA is maintained (1:0.47 Met; 1:0.56 Thr; 1:0.17 Try).

• 한국환경과학회지
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• 제3권1호
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• pp.65-76
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• 1994

자연호소의 혐기성 저질을 특정한 chlorophenol(CP)에 적응시킨 후 다른 구조물 가진 CP에 대한 탈염소 특성을 검토하였다. CP에 노출되지 않는 혐기성 저질에서는 mono-CP의 경우 ortho > meta > para-염소의 손으로 di-CP의 경우는 ortho > par > meta- 염소의 순서로 짧은 지체기를 거친 후 탈염소가 발생하였다. Mono-CP 중 2-CP에 적응된 저질은 4-CP와 3,4DCP를 제외하고, 3-CP에 적응시킨 저질은 4-CP를 제외한 모든 시험물질에 대하여 지체기 없이 탈염소 특성을 나타내었다. DCP에 적응된 모든 저질은 2-CP, 2,3,-, 2,4-, and 3,4-DCP를 지체기 없이 탈염소가 발생하지 않았다. 이 결과에서 볼 때 mono-와 di-CP를 탈염소시키는 혐기성 미생물의 종류가 다양함을 알 수 있다.

• 한국식품영양학회지
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• 제25권4호
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• pp.737-746
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• 2012

본 연구는 mushroom complete medium(MCM) 액체배지에 수삼 추출물(GE, $65^{\circ}Bx$)을 첨가하여 면역활성이 증진된 노루궁뎅이버섯(Hericium erinaceum) 균사체를 배양하고, 균사체로부터 활성다당성분을 분획하고자 하였다. MCM에 대하여 GE를 5, 10과 15%(v/v) 첨가한 액체배지에서 균사체를 배양하고, 각각의 조다당획분(HE-GE-5-CP, HE-GE-10-CP와 HE-GE-15-CP)으로 분획하여 면역활성을 측정한 결과, HE-GE-10-CP는 HE-GE-5-CP와 HE-GE-15-CP보다 높은 활성을 나타내었으며, GE를 첨가하지 않은 MCM에서 배양된 균사체 조다당획분(HE-CP)보다 유의적으로 증진된 면역활성을 나타내었다. 또한, HE-GE-10-CP의 DEAE-Sepharose CL-6B 분획물 중 가장 높은 활성을 나타낸 HE-GE-10-CP-II획분은 대조군인 HE-CP의 어떠한 획분보다도 유의적으로 높은 면역활성과 암 전이 억제활성을 나타내었다. 한편, 활성획분인 HE-GE-10-CP-II는 arabinose, rhamnose, galactose, glucose와 uronic acid(molar ratio; 0.34:0.26:0.99:1.00:0.39)로 구성되어 있으나, 대조군인 HE-CP의 동일용매 용출획분으로서 HE-GE-10-CP-II보다는 활성이 낮은 HE-CP-II는 fucose, mannose, galactose와 glucose(molar ratio; 0.32:0.55:1.00:0.96)를 함유하여 다른 구성당 분포를 나타내었다. 따라서 노루궁뎅이버섯 균사체 액체배양에서 수삼 추출물 첨가는 균사체의 구성당 변화를 통한 면역활성 증진에 관여하는 것으로 사료되어 기능성 소재 개발에 유용할 것으로 사료된다.

• 대한전자공학회논문지TC
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• 제46권7호
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• pp.52-60
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• 2009

본 논문에서는 십자형 슬롯 급전방식을 이용한 다층 CP-DRA(Circularly Polarized Dielectric Resonator Antenna)의 이득 및 축비대역폭 증대에 관하여 연구한다. CP-DRA의 이득 및 축비대역폭 증대를 위하여 단층 CP-DRA에 대하여 분석하고, 이를 바탕으로 다층 CP-DRA의 구조를 제안하여 동작특성을 연구한다. 또한, 안테나의 이득 증대를 위하여 다층 CP-DRA 사이의 간격을 0.7$\lambda_0$ 및 1.2$\lambda_0$로 2$\times$2 평면 배열한 안테나의 방사특성을 CST사의 MWS을 이용하여 시뮬레이션을 통해 검토한다. 제안한 다층 CP-DRA를 제작하여 측정한 결과, 이득 및 대역폭이 단층 CP-DRA에 비하여 약 2배 개선됨을 알 수 있다. 그리고, 다층 CP-DRA를 1.2$\lambda_0$ 간격으로 배열한 안테나에서 일반적인 배열안테나와 달리 grating lobe가 크게 감소하며, 이득은 13.4dBi, 축비대역폭은 0.8GHz으로 증가하였다.