• Journal of Nutrition and Health
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• 제11권1호
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• pp.39-43
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• 1978

번데기의 식품용달개발(食品用達開發)을 위해 몇가지 실험(實驗)을 하여 다음과 같은 결과를 얻었다. 1. 번데기의 이취(異臭)는 지방분(脂肪分)의 추출(抽出)로 제거(除去)할 수 있었다. 그 최적조건(最適條件)은 끊는 n-hexane으로 1시간조리(時關處理)하는 것이었다. 2. 실온(室溫)으로 방치(放置)한 번데기의 일반세균수(一般細菌數)는 6일(日)까지는 현저한 증가(增加)를 보이지 않았으며 균수(藝數)$10^8$을 초과하지 않아도 부패(腐敗)하여 식용(食用)하기 어렵게 되었다. 3. 강화가공용(强化加工用)의 탈지(脫脂)번데기는 수분(水分) 1.3%, 조단백(組蛋白) 76.0%, 조지방(組脂肪) 0.8%, 조회분(組灰分) 4.8%의 조성(組成)을 가졌다. 4. 제취목적(除臭目的)으로 alkali 처리(處理)를 하였으나 별(別)로 효과(效果)를 인정할 수 없었다. 5. 번데기의 脂肪酸組成은 myristic acid 0.35%, palmitic acid 20.90%, palmitoleic acid 0.50%, stearic acid 7.11%, oleic acid 32.20%, linoleic acid 6.48%, linolenic acid 30.31%였다.

• 분석과학
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• 제16권3호
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• pp.240-248
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• 2003

공업지역에서 악취원인물질로 잘 알려진 황화물은 매우 낮은 최소 후각감지농도를 나타낸다. 여러 악취발생원 주변의 대기 중 미량의 황화합물을 아르곤에서 농축시켜 선택성과 감도가 우수한 불꽃 광도 검출기 (FPD)가 장착된 가스크로마토그래프를 이용하여 측정하였다. 25% ${\beta}$,${\beta}$-Oxydipropionitrile, 60/80 Chromosob W가 저온농축을 위한 흡착제로 되었으며 이를 충전 유리컬럼의 충전제로도 사용하였다. 악취시료의 농축량은 0.1~3.0L 범위에서 채취장소에 따라 달리하였다. 주거지역과 사업장 부지경계선상에서의 공기 및 하수처리장과 같은 공업지역 내 사업장의 배출구 가스 중의 휘발성 황화합물의 농도를 측정하였다.

• 실내환경 및 냄새 학회지
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• 제16권2호
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• pp.139-149
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• 2017

In order to reduce odor and methane emission from the landfill, open biocovers and a closed biofilter were applied to the landfill site. Three biocovers and the biofilter are suitable for relatively small-sized landfills with facilities that cannot resource methane into recovery due to small volumes of methane emission. Biocover-1 consists only of the soil of the landfill site while biocover-2 is mixed with the earthworm casts and artificial soil (perlite). The biofilter formed a bio-layer by adding mixed food waste compost as packing material of biocover-2. The removal efficiency decreased over time on biocover-1. However, biocover-2 and the biofilter showed stable odor removal efficiency. The rates of methane removal efficiency were in order of biofilter (94.9%)>, biocover-1(42.3%)>, and biocover-2 (37.0%). The methane removal efficiency over time in biocover-1 was gradually decreased. However, drastic efficiency decline was observed in biocover-2 due to the hardening process. As a result of overturning the surface soil where the hardening process was observed, methane removal efficiency increased again. The biofilter showed stable methane removal efficiency without degradation. The estimate methane oxidation rate in biocover-1 was an average of 10.4%. Biocover-2 showed an efficiency of 46.3% after 25 days of forming biocover. However, due to hardening process efficiency dropped to 4.6%. After overturn of the surface soil, the rate subsequently increased to 17.9%, with an evaluated average of 12.5%.

• 한국물환경학회지
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• 제27권1호
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• pp.104-109
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• 2011

The removal efficiencies of 2-methylisoborneol (MIB) and geosmin were investigated to reveal removal characteristics of typical organic compounds causing disagreeable taste and odor at the conventional water treatment plant installed with pulsator clarifier patented by the French company $Degr{\acute{e}}mont$. The injection rate of Powdered Activated Carbon (PAC) into water was changed step wisely as we conducted jar tests in the laboratory and water treatment in the actual plant. 2-MIB concentration decreased linearly while geosmin did exponentially along with the injection rate of PAC at our jar tests. The removal efficiency of geosmin by PAC injection was considerably higher than that of 2-MIB. In the real pulsator clarifier, 2-MIB concentration started decreasing as the injection rate reached up to 10 mg/L of PAC. On the other hand, the concentration of geosmin in water decreased proportional to the injection rate of PAC. In the sand filtration, removal efficiencies of 2-MIB and geosmin on July were much higher than those on March. It was carefully suggested beforehand and found afterwards that general microorganisms notably existed in the sand filter with no chlorine in filter influent and backwash water and the sand filter biologically activated removed much more odor compounds. It was considered as the reason why the removal efficiency of 2-MIB and geosmin was increased. The microbial activity maybe increased in summer with water temperature rising and low filtration rate possibly increased contact time between odor compounds and general microorganisms.

• 환경위생공학
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• 제14권2호
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• pp.18-24
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• 1999

The purpose of this study was carried out to estimate removal possibility of IBMP and IPMP causing odor in raw water. As a result of Freundlich isotherm. IBMP was superior to IPMP in adsorptive capacity. Adsorptive capacities of activated carbon were found to be in order of Lignite, Coconut shell, and Charcoal. These were well fitted with Freundlich isotherm. According to adsorption breakthrough tests for Lignite GAC, breakthrough time of IPMP and IBMP were 5.7hr and 5.5hr, respectively. Because adsorptive capacities of target material were very different with pore size distribution, it seemed that Lignite and Coconut shell based activated carbons were recommended in order to remove door compounds.

• Elastomers and Composites
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• 제53권1호
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• pp.19-25
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• 2018

In this study, a new process was developed to develop the waste rubber material recycling system. Firstly, the blending of the reclaimed rubber/virgin rubber as a compounding technology was investigated in this study. Secondly, the removal of odor by using zeolite. Thirdly, the continuous crosslinking process technology was studied the technology can solve the environmentally harmful substances and economic problems. Based on this technology, we have started to develop application technologies such as floor mats and rubber sheets for forklifts, and will further study the environmentally conscious products in various ways. Our research will contribute to the recycling industry.

• 대한기관식도과학회지
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• 제5권1호
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• pp.36-41
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• 1999

Postoperative pain, poor oral intake and various complaints of adenotonsillectomized patients are the main problems for the otolaryngologist. Steroids have been advocated to reduce morbidity after adenotonsillectomy, but the results are conflicting. This study is to determine the effect of preoperative and postoperative oral steroid. Material and Methods : A prospective, randomized study was performed on 40 patients from 4 to 13 years of age. 20 patients undergoing adenotonsillectomy received steroid(experimental group), others undergoing adenotonsillectomy did not receive steroid(control group). An oral prednisolone was administered preoperatively for 3 days and postoperatively 7 days. A dosage was determined by patient's weight. Postoperatively each patients was examined for weight loss as well as for subjective signs of pain, oral intake, activity, mouth odor and analgesic usage. Results： experimental group showed decreased morbidity in view of postoperative pain, oral intake with statistical significance (p<0.05). The usage of analgesics was decreased in steroid group. but, activity, mouth odor and body weight showed no statistical difference. Conclusion： The results showed that preoperative and postoperative oral steroid affect the postoperative morbidity in adenotonsillectomy.

• Elastomers and Composites
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• 제50권4호
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• pp.245-250
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• 2015

Recycling of ethylene-propylene-diene terpolymer (EPDM) scrap was tried by blending with polypropylene (PP). EPDM scrap powder was prepared by shear pulverization process at high temperature, which may lead to selective chain scission induced by difference in the critical elastic coefficient. On the other hand, EPDM scrap powder was prepared by adding a selected reclaiming agent during shear pulverization process at high temperature. Terpene as a bonding agent was then introduced to improve adhesion property. PP, used as a matrix for manufacturing thermoplastic elastomer, was modified by the incorporation of dicumyl peroxide and maleic anhydride. The functionalized EPDM and modified PP were blended and cured dynamically at $190^{\circ}C$. The blend materials prepared in this study showed the comparable results to those of conventional TPE in terms of tensile and flow properties. Also, the odor component of recycled EPDM was analyzed using GC-MS.

• 생명과학회지
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• 제24권12호
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• pp.1325-1329
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• 2014

건강 기능성 한방 재료로 알려져 있는 구기자를 식품 재료로 이용하기 위해서는 건조 구기자가 오래되면 생성되는 이취 성분이 문제가 된다. 구기자중 저장 기간이 짧은 것(시료1)과 저장 기간이 오래 된 것(시료2)에 대해 휘발성 성분을 비교 분석하여 이취를 찾고 추후 이취를 제거하는 방법을 모색하기 위해 연구를 시행하였다. 각 구기자 시료에 대해서 동시증류추출장치(SDE)를 사용하여 휘발성 성분을 추출하고 GC-MS로 분석, 동정하였다. 시료1의 휘발성성분으로 aldehyde류 17종, alcohol류 8종, terpene류 6종, ester류 4종, ketone류 3종 및 furan류 3종, pyrazine류 3종 및 기타 2종을 포함한 총 45종의 향기성분을 동정하였다. 시료2의 휘발성성분으로 aldehyde류 12종, alcohol류 3종, terpene류 5종, ester류 2종, ketone류 4종, furan류 3종, pyrazine류 3종, 산인 isovaleric acid 1종 및 기타 2종을 포함한 총 34종의 향기성분을 동정하였다. 두 시료 중에서 휘발성 성분의 차이가 있었다. 이러한 휘발성 성분의 차이와 함량의 변화는 구기자의 저장 기간이 길어지면 좋지 않은 냄새에 영향을 미친다고 생각되지만 저장 기간이 짧은 구기자에는 없고 저장기간이 오래 된 구기자에만 동정된 역치가 매우 낮은 isovaleric acid은 구기자 제품의 저장성이 경과할 때 영향을 줄 것으로 생각되었다.

• Animal Bioscience
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• 제35권12호
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• pp.1977-1985
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• 2022

Objective: This study was conducted to determine the seasonal characteristics of odorous material emissions from a swine finishing barn equipped with a continuous pit recirculation system (CPRS) using aerobically treated manure. Methods: The CPRS consists of an aerobic manure treatment process and a pit recirculation system, where the solid fraction is separated and composted. The aerated liquid fraction (290.0%±21.0% per day of total stored pig slurry) is continuously recirculated to the top of the slurry in the pit. Four confinement pig barns in three piggery farms were used: two were equipped with CPRS, and the other two operated a slurry pit under the slatted floor across all seasons. Results: The indoor, exhaust, and outside odor intensities were significantly lower in the CPRS group than in the control group (p<0.001). In the CPRS group, the odor intensity outside was significantly lower in the fall than in the other seasons (p = 0.015). In the indoor atmosphere, the temperature and CO₂, NH₃, and H₂S contents of the CPRS group were significantly lower than those of the control group (p<0.05). In the CPRS group, indoor temperature did not significantly change in the spring, summer, and fall seasons and was significantly lower in the winter (p = 0.002). NH₃, H₂S, methyl mercaptan, dimethyl disulfide, trimethylamine, phenol, indole, and skatole levels were significantly lower in the CPRS group than in the control group (p<0.05). There were significant seasonal differences on the odorous material in both the control and CPRS groups (p<0.05), but the pattern was not clear across seasons. Conclusion: The CPRS can reduce the indoor temperature in the summer to a level similar to that in the spring and fall seasons. The CPRS with aerated liquid manure is expected to reduce and maintain malodorous emissions within acceptable limits in swine facilities.