• 한국식품조리과학회지
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• 제5권1호
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• pp.69-74
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• 1989

참치기름담금통조림과 굴, 홍합훈제기름담금통조림을 구입하여 Glass Capillary Gas Chromatography (Hewlett Packard, 5880 A)로 분석한 trans 지방산 함량과 산가, 과산화물가, 요오드가, 검화가 측정으로 관찰된 이화학적 성질의 변화는 다음과 같다. 1. 면실유가 주입된 참치, 굴, 홍합통조림에서 검출된 trans지방산의 대부분은 t,c-18:2이며 대두유가주입된 참치통조림에서 검출된 trans 지방산은 t,c-18:2 뿐만 아니라 c,c,t-18:3과 t,t,c-18:3도 소량 존재하였다. 2. Trans 지방산의 총평균 함량은 대두유가 주입된 참치통조림에서 2.26%로 가장 높았다. 또한 참치통조림의 경우 주입된 면실유나 대두유 모두 유통기간 긴 것에서 총 trans지방산 함량이 다소 더 높은 값을 보인 반면, 굴, 홍합통조림에서는 총 trans지방산 함량도 낮으면서 유통기간 중 변화도 거의 없는 것으로 나타났다. 3. 통조림에 주입된 유지의 유통기 간 중 산패도는 1년 내외의 기간에서는 산가가 0.5∼2.0 정도, 과산화물가는 0.6∼3.5 meq/kg oil 정도로 나타나 안정된 상태를 유지하고 있는 것으로 나타났다.

• 한국식품과학회지
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• 제12권2호
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• pp.126-132
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• 1980

n-hexane으로 추출한 고추씨 기름에 함유되어 있는 붉은 색과 매운 맛의 제거를 시도하였다. 예상한 대로 붉은 색은 탈색 및 탈취 공정중에서 제거되었으나 매운 맛을 내는 capsaicin의 제거에는 탈취 공정은 별 영향이 없었고 탈색 공정이 아주 효과적임을 알았다. 4 %의 산성 백토를 가지고 탈색을 했을 때 capsaicin은 완전히 제거 되었다. 또한 기름 중의 capsaicin의 산성 백토에의 흡착은 산성 백토의 양을 증가함에 따라 대수적으로 감소했고 다음과 같이 Freundlich 식을 이용할 수 있음을 알았다 : ${\frac{x}{m}}=1.1\;c^{0.31}$, 여기서 x는 백토에 흡착된 capsaicin의 양 ((mg/ml), m은 산성 백토의 양 (%), 그리고 c는 탈색 후의 잔존 capsaicin의 양 (mg/ml)이다. 고추씨 기름의 중성 지질의 구성을 보면 95.87 % triglyceride, 1.55 % sterol ester, 1.45 % monoglyceride, 0.78 % 유리 지방산, 0.2 % diglyceride와 0.15 % sterol이었다. 또한 HPLC에 의한 고추씨 기름의 지방산 조성을 보면 리놀산 (78.79 %), 팔미틴산 (15.27 %)과 올레인산 (2.93 %)이 주 지방산이었고 리놀린산은 0.63 %로 극히 적은 량이었다.

• 한국수산과학회지
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• 제52권2호
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• pp.121-126
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• 2019

Trimethylamine (TMA) is a nitrogen-based aliphatic organic compound. It is a major odorous component of fish and fishery products and is often used as an indicator of fish quality. The efficacy of TMA removal by various yeast strains was investigated. The five yeast strains found to be most effective in removing TMA were isolated from fermented foods and were identified as Saccharomyces cerevisiae based on biochemical and 18S rRNA sequence analyses. These strains were designated as S. cerevisiae SK1511, SK1512, SK1513, SK1514 and SK1515. Yeast cultures were treated with a TMA solution (0.3%, v/v), and the level of TMA reduction was analyzed by headspace gas chromatography. The five S. cerevisiae strains removed 32.02-50.34% of the TMA from the solution. This study is the first to demonstrate TMA reduction by microbial treatment.

• 한국포장학회지
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• 제24권3호
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• pp.113-120
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• 2018

The one-way gas valve developed in this study was designed to prevent the breakage of packages from increased internal pressure, which is a problem in packaged Kimchi, and simultaneously reduce the outflow of the offodor release. The effect of the one-way gas valve on the headspace atmospheric compositions was investigated in the packaging system. The changes of atmospheric compositions and quality factors of Kimchi, such as $CO_2$ accumulation, pH, titratable acidity, and salinity, were measured during a 4-week storage period at $4^{\circ}C$. The Kimchi package with the one-way gas valve dramatically reduced pressure build-up in the pouch by allowing the controlled flow of gas to the atmosphere. In addition, the package design allows the possibility of controlling the gas generated from Kimchi by adjusting the viscosity of the open pressure control oil. The one-way gas valve did not affect the sensory characteristics of Kimchi products during the storage period. Furthermore, the deodorizing capability of the activated carbon contained in the one-way gas valve effectively reduced the off-odor of Kimchi products released along with carbon dioxide. The novel one-way gas valve is considered to be an active packaging system that can solve major problems of expansion and off-odor leakage in the packaging of Kimchi.

• 한국미생물·생명공학회지
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• 제47권1호
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• pp.116-124
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• 2019

The rapid development of the poultry industry has led to the production of large amounts of manure, which produce substances like hydrogen sulfide ($H_2S$) that contribute to odor pollution. $H_2S$ is a highly undesirable gas component and its removal from the environment is therefore necessary. Sulfur-oxidizing bacteria (SOB) are widely known to remove contaminating $H_2S$ due to their ability to oxidize reduced sulfur compounds. In this study, three potential SOB (designated AH18, AH25, and AH28) that were previously isolated from a hot spring in Malaysia were identified by 16S rRNA gene analysis. Laboratory-scale biological deodorization experiments were conducted to test the performance of the three isolates-in the form of pure or mixed cultures, with the cells immobilized onto alginate as a carrier-in reducing the $H_2S$ from chicken manure. On the basis of 16S rRNA phylogenetic analysis, isolate AH18 was identified as Pseudomonas sp., whereas isolates AH25 and AH28 were identified as Achromobacter sp. The most active deodorizing isolate was AH18, with an $H_2S$ reduction rate of 74.7% (p < 0.05). Meanwhile, the reduction rates for isolates AH25 and AH28 were 54.2% and 60.8% (p > 0.05), respectively. However, the $H_2S$ removal performance was enhanced in the mixed culture, with a reduction rate of 81.9% (p < 0.05). In conclusion, the three potential SOB isolates were capable of reducing the $H_2S$ from chicken manure in the form of a pure culture immobilized on alginate, and the reduction performance was enhanced in the mixed culture.

• 한국인터넷방송통신학회논문지
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• 제19권2호
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• pp.229-236
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• 2019

우리나라 산업의 근간인 뿌리기업의 자동화 스마트 공정상 IOT 미들웨어는 사물인터넷 기기(센서 등)의 데이터 정보를 해석하고 관리하며 제어할 수 있는 중추적 역할이 요구된다. 특히 뿌리산업은 산업별 공정 흐름이 상이하고 기업별 데이터 처리요구도 다양해 이를 수용하기 위한 범용 IOT 미들웨어가 필요한 상황이다. 본 논문이 제시한 IOT 미들웨어 구조는 그에 대한 해결책으로 통신, 데이터 수집과 처리, 서비스 연계 등 미들웨어 기본 프로세스는 엔진부로 범용화 시키고 뿌리산업 분야별 사물인터넷 기기와 기업별 처리 요구사항은 개별적으로 대응할 수 있는 Plug-in 구조를 도입함으로서 유연하고 효과적인 뿌리산업 스마트 공정을 제안하였다. 또한 미들웨어 Plug-in과 연계 서비스 계층 간 네트워크 데이터에 대한 암호화를 통해 변조, 탈취 등에 대한 예방과 보안을 강화하는 방안을 제시하였다. 향후 MQTT, COAP, XAMP 등 다양한 네트워크 프로토콜에서 확장 가능할 수 있도록 뿌리산업에 특성화된 IOT 미들웨어 플랫폼으로 발전시킬 시스템을 제안하고자 한다.

• 한국포장학회지
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• 제27권2호
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• pp.55-62
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• 2021

This study aims to reduce the rancid odor generated during the fermentation process of kimchi by inserting zinc oxide (ZnO) into an inorganic porous material with a high surface area to decompose or adsorb the fermentation odor. ZnO activated by the presence of moisture exhibits decomposition of rancid odors. Mixed with Titanium dioxide (TiO₂), a photocatalyst. To manufacture the packaging liner used in this study, NaOH, ZnCl₂, and TiO₂ powder were placed in a tank with diatomite and water. The sludge obtained via a hydrothermal ultrasonication synthesis was sintered in an oven. After being pin-milled and melt-blended, the powders were mixed with linear low-density polyethylene (L-LDPE) to make a masterbatch (M/B), which was further used to manufacture liners. A gas detector (GasTiger 2000) was used to investigate the total amount of sulfur compounds during fermentation and determine the reduction rate of the odor-causing compounds. The packaging liner cross-section and surface were investigated using a scanning electron microscope-energy dispersive X-ray spectrometer (SEM-EDS) to observe the adsorption of sulfur compounds. A variety of sulfur compounds associated with the perceived unpleasant odor of kimchi were analyzed using gas chromatography-mass spectrometry (GC-MS). For the analyses, kimchi was homogenized at room temperature and divided into several sample dishes. The performance of the liner was evaluated by comparing the total area of the GC-MS signals of major off-flavor sulfur compounds during the five days of fermentation at 20℃. As a result, Nano-grade inorganic compound liners reduced the sulfur content by 67 % on average, compared to ordinary polyethylene (PE) foam liners. Afterwards SEM-EDS was used to analyze the sulfur content adsorbed by the liners. The findings of this study strongly suggest that decomposition and adsorption of the odor-generating compounds occur more effectively in the newly-developed inorganic nanocomposite liners.

• 한국초지조사료학회지
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• 제40권4호
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• pp.274-278
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• 2020

Pig slurry (PS) is the most applicable recycling option as an alternative organic fertilizer. The application of pig slurry has the risk of air pollution via atmospheric ammonia (NH3) and nitrous oxide (N2O) emission. The zeolite has a porous structure that can accommodate a wide variety of cations, thus utilizing for the potential additive of deodorization and gas adsorption. This study aimed to investigate the possible roles of zeolite in mitigating NH3 and N2O emission from the pig slurry applied to the maize cropping. The experiment was composed of three treatments: 1) non-N fertilized control, 2) pig slurry (PS) and 3) pig slurry mixed with natural zeolite (PZ). Both of NH3 and N2O emission from applied pig slurry highly increased by more than 3-fold compared to non-N fertilized control. The NH3 emission from the pig slurry was dominant during early 14 days after application and 20.1% of reduction by zeolite application was estimated in this period. Total NH3 emission through whole period of measurement was 0.31, 1.33, and 1.14 kg ha-1. Nitrous oxide emission in the plot applied with pig slurry was also reduced by zeolite treatment by 16.3%. Significant increases in forage and ear yield, as well as nutrient values were obtained by pig slurry application, while no significant effects of zeolite were observed. These results indicate that the application of zeolite and pig slurry efficiently reduces the emission of ammonia and nitrous oxide without negative effects on maize crop production.

• 한국전자거래학회지
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• 제27권1호
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• pp.111-126
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• 2022

미국과 중국의 기술패권 전쟁이 전개되고 연구개발의 중요성이 증가함에 따라 세계 각국은 연구개발 투자를 증대하고 있다. 우리나라는 정부 및 기업의 연구개발 투자 규모가 매년 꾸준하게 증가하였으며, 창조형 기술개발의 방향으로 전환되며 다양한 분야에서 첨단 기술이 개발되고 있다. 하지만 많은 예산과 시간, 노력이 투입된 국내의 첨단 핵심 기술이 해외로 불법 유출되는 사례 또한 꾸준히 증가하고 있다. 연구보안은 이처럼 연구환경에 존재하는 보호대상을 유출 및 탈취 등의 위험요소로부터 안전하게 보호하기 위한 활동으로, 우리나라뿐만 아니라 미국 등 각국에서 연구보안을 위한 법령 및 제도를 정비하고 있다. 본 논문에서는 연구보안제도의 개선을 위해, 전 세계 연구개발비 1위를 차지하고 있으며 연구보안정책 및 법령의 정비를 위한 논의가 활발하게 이루어지고 미국의 연구보안 사례를 중점으로 우리나라의 연구보안 정책방향을 도출하고자 한다.

• 패션비즈니스
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• 제26권4호
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• pp.100-111
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• 2022

After the corona pandemic, when consumers choose clothes, the issue of sustainability has become a more important selection criterion. The eco-friendly functional fiber used in the study is a smartcell, which has functions such as UV protection, decomposition of harmful substances, deodorization, antibacterial and biodegradation. This eco-friendly functional fiber was dyed using five kinds of natural dyes to examine the color change according to dyeability and dyeing conditions. As natural dyes, gardenia, turmeric, sappan wood, lac, and indigo were used. For comparison with smartcell, rayon, a cellulose regenerated fiber, and wool fiber, a protein fiber, were dyed under the same conditions to compare dyeability and color. The study results are as follows. It was found that smartcell had superior dyeability compared to rayon and wool in gardenia dye and showed lower dyeability than wool when dyeing turmeric, sappan wood, and lac dyes, but showed superior or similar dyeability than rayon. In case of indigo dyeing, the dyeability of smartcell was the best when dyed once, but it was found that smartcell had a lower effect on repeated dyeing compared to wool or rayon. Therefore, smartcell has superior dyeability compared to rayon fiber in gardenia, turmeric, sappan wood, and lac dyeing, and in case of indigo dyeing, it is suitable for light dyeing. When smartcell is produced as textile fashion products, natural dyeing is actively introduced and commercialized, and it is hoped that this study can be a reference material.