• 한국식품저장유통학회지
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• 제13권5호
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• pp.569-573
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• 2006

생리활성물질을 다량 함유하고 있는 노루궁뎅이 버섯을 효과적으로 섭취하기 위하여 분말, 과립, 타블렛, 캅셀 등 다양한 제형으로 가공하였으며 이들의 품질특성을 비교하였다. 수분함량은 분무건조 분말, 과립, 타블렛 순으로 그 값은 각각 4.37%, 3.78%, 3.43%으로 나타났으며 총당 함량은 분무건조 분말이 19.14 g%로 가장 낮은 함량을 보여주었고 단백질 함량은 분무건조 분말, 과립, 타블렛 순으로 그 값은 각각 4.39 g% 1.04g%, 0.75g% 임을 확인하였다. 제형별 수분결합지수는 과립 및 타블렛 제품이 분무건조분말 제품보다 수분결합지수가 낮은 것으로 나타났는데 이는 과립과 타블렛 제조시 가용성의 탄수화물 제제인 부형제가 많이 첨가되었기 때문인 것으로 판단된다. 전체적인 색상을 나타내는 hue angle은 분무건조 분말이 $85.50^{\circ}$, 과립이 $95.37^{\circ}$, 타블렛이 $94.67^{\circ}$로 나타났다. 저장안정성을 확인하기 위한 제형별 흡습특성은 분무건조 분말이 가장 높은 흡습성을 보였으며 과립, 타블렛 순으로 뚜렷한 차이를 나타내어 분무건조 분말보다는 타블렛 형태로 제조한다면 저장성 면에서 더 우수한 제품을 얻을 것으로 사료된다.

• 한국세라믹학회지
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• 제56권3호
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• pp.211-232
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• 2019

Porous ceramics are promising materials for a number of functional and structural applications that include thermal insulation, filters, bio-scaffolds for tissue engineering, and preforms for composite fabrication. These applications take advantage of the special characteristics of porous ceramics, such as low thermal mass, low thermal conductivity, high surface area, controlled permeability, and low density. In this review, we emphasize the direct foaming method, a simple and versatile approach that allows the fabrication of porous ceramics with tailored microstructure, along with distinctive properties. The wet foam stability is achieved under the controlled addition of amphiphiles to the colloidal suspension, which induce in situ hydrophobization, allowing the wet foam to resist coarsening and Ostwald ripening upon drying and sintering. Different components, like contact angle, adsorption free energy, air content, bubble size, and Laplace pressure, play vital roles in the stabilization of the particle stabilized wet foam to the porous ceramics. The mechanical behavior of the load-displacements curves of sintered samples was investigated using Herzian indentations testes. From the collected results, we found that microporous structures with pore sizes from 30 ㎛ to 570 ㎛ and the porosity within the range from 70% to 85%.

• 한국정보전자통신기술학회논문지
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• 제11권2호
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• pp.161-168
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• 2018

본 논문은 곡물의 수확후 이력관리를 위하여 미곡종합처리장(RPC, Rice processing complex)에서 곡물의 반입, 건조, 저장 및 가공공정에서의 변화하는 중량 및 함수율 정보를 실시간으로 측정하고 모니터링이 가능한 IT기반의 이력관리시스템을 개발하였다. 곡물의 반입, 건조, 저장 및 가공 등 수확후 처리공정에서 반입 및 배출과정에서 중량 및 함수율 정보를 실시간으로 수집하고 이를 기반으로 수율 및 감모와 같은 품질정보를 DB sever에 저장하였다. 이 때의 Lot No를 생성하여 품질 및 이력정보를 연계하여 이력관리가 가능한 시스템을 구축할 수 있도록 설계하였다. 또한, MMI(Man Machine Interface)기반의 자동제어시스템과 자동수율 및 재고관리 시스템(YICS)과 TCP/IP통신을 이용하여 곡물을 대상으로 한 IT 기반의 이력관리시스템을 구축하였으며, 미곡종합처리장에서 시뮬레이션을 통해 검증을 수행하였다.

• 한국조경학회지
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• 제32권2호
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• pp.86-101
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• 2004

This study was conducted to present the ecological management of Goduk Riverside Restoration Area in Hangang, Seoul by analyzing the change of the vegetation structure. The survey site was classified into three groups. These were the vegetation restoration area, the dry plant area, and the swampy plant area. There were 141 taxa including naturalized plants and 13 species recorded in 2001 and 258 taxa including naturalized plants and 42 species were recorded in 2003 by monitoring. Monitoring results showed that the alien plants such as Humulus japonicus expanded continuously except in the vegetation restoration area. It was found that the growing status of planted shrub plants were poor, and the naturalized plants status was thriving, and the soil environment was bad in the vegetation restoration area. The alien plants such as Humulus japonicus and Aster pilosus dominated continuously in the dry plant area. The swampy native herb plants number was decreased, but the Humulus japonicus community was expanded caused by the soil drying in the swampy plant area. Soil analysis showed that the soil acidity, the available phosphates and the concentration of calcium were highly effected by cultivation. We propose ecological management as follows based on the results of the change of vegetation and soil characteristics. The vegetation restoration area should be managed by visitor's characteristics. Replanting vegetations should be based on soil characteristics. The removal of naturalized plants and established monitoring with plots is also needed. In the dry plant area and the swampy plant area, naturalized plants need to be removed in order to facilitate bio-diversity and monitoring.

• 한국축산식품학회지
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• 제43권1호
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• pp.61-72
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• 2023

The practical use of Korean native black goat skin as a source of gelatin extraction is limited. The objective of this study was to optimize the extraction temperature and time of gelatin from Korean native black goat skin, and to compare the quality characteristics of goat skin gelatin and other commercial gelatin products. Response surface methodology was applied to optimize the extraction temperature and time of gelatin obtained from native Korean black goat skin. The effects of temperature (50℃-70℃) and time (2-4 h) on extraction yield and gel strength were investigated using a face-centered central composite design with 13 experiments. Gelatin extraction from Korean native black goat skin was prepared through the serial processes of alkali pre-treatment, bleaching, neutralization, hot-water extraction, and freeze-drying. Using the optimization plot of Minitab software, the optimized conditions for extracting temperature and time of goat skin gelatin were 59.49℃ and 3.03 h, and the optimized values of extraction yield and gel strength were 12.52% and 263.37 g, respectively. Based on a quality comparison of goat skin gelatin with commercial gelatin, the pH value of gelatin extracted from Korean native black goat skin was 5.57. The color of gelatin extracted from Korean native black goat skin was darker than that of commercial gelatin (p<0.05). Higher emulsifying properties and gel strength of goat skin gelatin were observed when compared to those of commercial gelatin (p<0.05). Therefore, the results of this study indicate that Korean native black goat skin may be a valuable source for gelatin extraction.

• Journal of Ginseng Research
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• 제48권1호
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• pp.1-11
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• 2024

Fresh ginseng is prone to spoilage due to its high moisture content. For long-term storage, most fresh ginsengs are dried to white ginseng (WG) or steamed for hours at high temperature/pressure and dried to form Korean Red ginseng (KRG). They are further processed for ginseng products when subjected to hot water extraction/concentration under pressure. These WG or KRG preparation processes affect ginsenoside compositions and also other ginseng components, probably during treatments like steaming and drying, to form diverse bioactive phospholipids. It is known that ginseng contains high amounts of gintonin lysophosphatidic acids (LPAs). LPAs are simple lipid-derived growth factors in animals and humans and act as exogenous ligands of six GTP-binding-protein coupled LPA receptor subtypes. LPAs play diverse roles ranging from brain development to hair growth in animals and humans. LPA-mediated signaling pathways involve various GTP-binding proteins to regulate downstream pathways like [Ca²⁺]_i transient induction. Recent studies have shown that gintonin exhibits anti-Alzheimer's disease and antiarthritis effects in vitro and in vivo mediated by gintonin LPAs, the active ingredients of gintonin, a ginseng-derived neurotrophin. However, little is known about how gintonin LPAs are formed in high amounts in ginseng compared to other herbs. This review introduces atypical or non-enzymatic pathways under the conversion of ginseng phospholipids into gintonin LPAs during steaming and extraction/concentration processes, which exert beneficial effects against degenerative diseases, including Alzheimer's disease and arthritis in animals and humans via LPA receptors.

• 한국포장학회지
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• 제29권3호
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• pp.223-228
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• 2023

Sustainable energy supplies without the recharging and replacement of the charge storage device have become increasingly important. Among various energy harvesters, the triboelectric nanogenerator (TENG) has attracted considerable attention due to its high instantaneous output power, broad selection of available materials, eco-friendly and inexpensive fabrication process, and various working modes customized for target applications. In this study, the amount of voltage and current generated was measured by applying the PSD profile random vibration test of the electronic vibration tester and ISTA 3A according to the time of Anodized Aluminum Oxide (AAO) pore widening of the manufactured TENG device Teflon and AAO. The discharge and charging tests of the integrated module during the random simulated transport environment and the recognition distance of RFID were measured while agricultural products (onion) were loaded into the returnable folding plastic box. As a result, it was found that AAO alumina etching processing time to maximize TENG performance was optimal at 31 min in terms of voltage and current generation, and the integrated module applied with the TENG module showed a charging effect even during the continuous use of RFID, so the voltage was kept constant without discharge. In addition, the RFID recognition distance of the integrated module was measured as a maximum of 1.4 m. Therefore, it was found that the surface condition of AAO, a TENG element, has a great influence on the power generation of the integrated module, and due to the characteristics of TENG, the power generation increases as the surface dries, so it is judged that the power generation can be increased if the surface drying treatment (ozone treatment, etc.) of AAO is applied in the future.

• 한국식품저장유통학회지
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• 제31권2호
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• pp.218-226
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• 2024

The oriental melon poses challenges in terms of long-term storage and distribution. Addressing these issues requires an extension of the storage life through appropriate processing. In this study, pretreated hot-air dried oriental melon slices (steamed and freeze-thawed) were prepared, and their physicochemical and organoleptic properties were examined. The control group (CON) consisted of hot-air dried oriental melon slices without pretreatment, while the steamed group (STG) and freeze-thawed group (FTG) consisted of hot-air dried oriental melon slices pretreated using steaming and freeze-thawing methods, respectively. The moisture contents detected in the CON, STG, and FTG groups ranged from 15.96% to 27.30%, with variations of 7.53 to 8.40 °Brix for the soluble solid contents. The CON group showed the highest Hunter color value for lightness (L^*) and the lowest value for redness (a^*). The texture profile analysis revealed the highest hardness and chewiness in the order of STG > CON > FTG. Considerable differences were observed in springiness and adhesiveness in the FTG group compared to the other groups. The organoleptic evaluation showed that the CON group had the highest sensory scores for overall preference. These findings indicate that the properties of hot-air dried oriental melon slices were influenced by physical pretreatments and that manufacturing these slices without pretreatment is the most effective method in terms of processing simplicity and cost efficiency.

• 한국해양바이오학회지
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• 제2권3호
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• pp.133-141
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• 2007

국내 해조류 자원의 이용성 증대를 위해서 해조류의 기능성, 유산균 생육 특성, 가공식품에의 이용, 생분해성 포장재의 소재, 그리고 부산물을 이용한 동물사료화 및 퇴비화 가능성의 연구 보문을 조사하였다. 기능성물질 연구에서는 유용색소 (Fucoxanthin)의 추출과 부위별 함량 및 분광학적인 특성이 있으며, 해조류로부터 alginate의 함량 조사와 최적추출조건 확립에 대한 연구를 수행하여 AASA (Acid alkali soluble alginate) 추출방법에서 3% $Na_2CO_3$ 농도와, $H_2SO_4$의 농도 0.4 N에서 가장 높은 수율을 얻었다. 톳으로부터 산알칼리 (AASA) 방법으로 추출한 알긴산에 인위적으로 sulfate를 흡착 Lactobacillus acidophilus를 접종한 후 배양하면서 유산균의 성장에 대한 영향을 살펴 본 결과 모든 농도에서 이들 배지에 S-alginate를 첨가한 것이 유산균의 성장을 증가시켰다. 미역귀 추출물로 잼을 제조하였고, 김, 미역, 다시마의 물 추출물로 물성이 우수하고 관능성적도 양호한 젤리를 제조하였다. 해조류 젤리를 상품화하는데 있어서 해조류가 갖는 해조취와 젤리색소의 안정화가 상품화의 요소로 대두되어 이를 개선할 방법도 제시되었다. 해조 간장과 된장 및 두부에서는 다당류나 무기질 등 영양적인 기능성과 관능적 기호성을 향상시킬 수 있었다. 알긴산 필름의 물성 증진을 위하여 $CaCl_2$를 필름용액에 직접 첨가 또는 필름을 $CaCl_2$용액에 침지하는 두 가지 방법에서 수분 저항성이 강한 필름을 제조할 수 있었다. 미이용 해조분말이나 해조가공 부산물로 얻어지는 해조분말을 이용하여 새로운 생분해성 포장소재로 사용할 수 있는 가능성이 있다. 해조류의 영양성분 및 아미노산 함량을 분석한 결과 사료첨가제로서 충분한 가치가 있었으나 다량의 염분 함량으로 인하여 그 가치가 평가 절하되었다. 따라서 해조류의 사료적 가치를 증진시키기 위하여 발효처리를 하였으며, 그 결과 기능성 영양소 (불포화 지방산)가 증가되는 효과가 있었다.

• 분석과학
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• 제29권1호
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• pp.49-55
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• 2016

케톤체는 생체 에너지 생산과정이 탄수화물보다는 지방산의 의존도가 높을 때 생성되며, 과도한 분비는 당뇨병성 케토시스나 선천성 유전성 대사이상질환을 의심할 수 있는 근거가 된다. 따라서 이의 신속 정확한 분석법의 개발이 필요하다. 본 연구에서는 혈장을 제단백한 후 hydroxylamine을 가하여 60 ℃에서 30 분간 반응시켜 oximation 후 BSTFA를 가한 후 trimethylsilylation 유도체화하여 혈장 중에서 케톤체를 신속하게 정량할 수 있는 GC-MS/SIM 분석법을 개발하였다. 케톤체의 직선성의 범위는 0.001-250 μg/mL 이었고, 혈장에서의 검출한계는 0.1 pg 이었다. 직선성을 가지는 범위에서의 상관계수(R2)는 0.998-0.999이었고, 회수율은 1 μg/mL의 표준품을 첨가하였을 때 88.2-92.3 %, 10 μg/mL의 농도를 첨가하였을 때 89.5-94.8 % 였으며 RSD는 6.3-9.4 %였다. 이 분석법을 정상인과 케토시스 환자의 검체에 적용하여 벨리데이션 하였으며, 본 분석방법은 어린이나 성인의 당뇨성 케토시스나 여러 유전성대사질환 환자 중 케토시스를 보이는 환자의 혈장 중 β-hydroxybutyric acid/acetoacetic acid의 비를 계산하여 케톤체를 신속하고 효율적으로 임상검체 분석에 응용할 수 있음을 보여주었다.