The objective of this study is to assess the impact of spray drying conditions on medium-chain triglyceride (MCT) loading, solubility, and release of an MCT-loaded solid self-emulsifying system in a water-insoluble oily substance. MCT-loaded solid self-emulsifying systems are prepared by spray drying with SDS and calcium silicate. The effects of inlet temperature (60, 80, or 100oC) and feed solution composition (0, 10, 50, 90, or 100% ethanol) on physicochemical properties of MCT-loaded solid self-emulsifying systems are studied. The inlet temperature significantly affects the water solubility of MCT. Moreover, the feed solution composition significantly affects water solubility, release rate, and MCT loading. The MCT-loaded solid self-emulsifying system obtained at 60oC using 90% ethanol feed solution shows the best physicochemical properties among the synthesized products and exhibits better water solubility (4.43 ± 0.44 vs. 0 μg/mL) and release (94.4 ± 1.6 vs. 32.8 ± 7.4%, 60 min) than a commercial product. Furthermore, the MCT-loaded solid self-emulsifying system shows an excellent emulsion droplet size (approximately 230 nm).

The purpose of this study was to investigate the antioxidant activities, quality characteristics, and storage stability of perilla oil mayonnaise (PM) with different levels of onion powder (OP) from 0 to 3%. As the amount of OP increased, the L, a, and b values increased, but pH decreased (p<0.05). The addition of OP raised viscosity (p<0.05). The addition of OP to PM proportionally increased the total phenolic content, and antioxidant activities as measured by DPPH and ABTS radical scavenging activity, and FRAP assay. When compared to PM without OP, PM that contained OP had a peroxide value that was almost 1.94 times lower. The emulsion stability was between 97.62 to 94.92% in the PM without OP and PM with OP groups was 99.60% for 12 weeks. This study showed that the inclusion of OP in PM has the potential to inprove its quality, antioxidant activities, and storage stability.

Lubricant oil waste contaminated with radioactive materials generated at nuclear facilities can be disposed of as industrial waste in accordance with self-disposal standards if only radioactive materials are removed. Lubricant oil used in nuclear facilities consists of oil of 75-85% and additives of 15-25%, and lubricant oil waste contains heavy metals, carbon, glycol, etc. In addition, lubricant oil waste from nuclear facilities contains metallic gamma-ray emission radionuclides including Co-60, Cs-137 and volatile beta-ray emission radionuclides such as C-14 and H-3, which are not present in lubricant oil waste from general industries and these radionuclides must be eliminated according to the Atomic Energy Act. In general industries, the wet treatment technologies such as acid-white soil treatment, ion purification, thin film distillation, high temperature pyrolysis, etc. are used as the refining technology of lubricant oil waste, but it is difficult to apply these technologies to nuclear industrial sites due to restrictions related with controlling the generation of secondary radioactive waste in sludge condition containing radionuclides of metal components, and limiting the concentration of volatile radioactive elements contained in refined oil to be below the legal threshold. In view of these characteristics, the refinement system capable of efficiently refining and treating lubricant oil waste contaminated with radioactive materials generated in nuclear facilities has been developed. The treatment process of this R&D system is as follows. First, the moisture in the radioactive lubricant oil waste pretreated through the preprocessing system is removed by the heated evaporating system, and the beta-emission radionuclides of H-3 and C-14 can be easily removed in this process. Second, the heated lubricant oil waste by the heated evaporating system is cooled through the heat exchanging system. Third, the particulate matters with gamma-ray emission radionuclides are removed through the electrostatic ionizing system. Forth, the lubricant oil waste is stored in the storage tank and the purified lubricant oil waste is discharged to the outside after sampling and checking from the upper, middle and lower positions of the lubricant oil waste stored in the storage tank. Using this R&D system, it is expected that the amount of radioactive waste can be reduced by efficiently refining and treating lubricant oil waste in the form of organic compounds contaminated with radioactive materials generated in nuclear facilities.

이 사건은 우리나라 해운산업에 큰 영향을 미친 H해운 파산으로 인하여 발생 한 여러 유형의 법적분쟁 중 한 가지이다. 그 중 정기용선계약에 있어 회생절차 의 개시에 따른 계약 해지에 관한 손해배상채권의 준거법 결정과 정기용선계약 에 있어 반선시 잔존유 반환채권의 문제 및 영국법상 상계의 적용 문제 등 다양 한 쟁점이 존재한다. 이와 관련한 주요 쟁점 중 정기용선계약의 반선시 계약서식에 따른 잔존유 반 환채권의 문제에 대해 살펴보고, 준거법이 외국법인 영국법으로 지정된 경우에 있어 상계의 문제에 대해 검토하였다. 우선 NYPE 1946과 1993 서식을 사용하는 경우와 NYPE 2015 서식의 사용에 는 많은 차이가 있으므로 앞의 서식을 사용할 때는 추가약관을 보완할 필요가 있다. 특히 이 사건의 핵심인 정기용선계약의 중도해지에 따른 잔존유 반환채권 의 경우 NYPE 1946 서식에서는 제외되지만, NYPE 2015 서식에서는 포함시키고 있음을 인식할 필요가 있다. 그 다음으로 영국법상 중도해지에 대한 상계의 문제는 보통법상 상계와 형평 법상 상계의 적용에 있다. 영국 법원과 한국 법원의 판단은 실체법적인 성격을 포함하고 있으므로 보통법상 상계가 적용된다는 것이다. 타당한 판단이지만 준 거법으로 영국법이 적용되는 경우 운송계약에 있어 항해용선계약과 정기용선계 약의 청구원인별 상계 허용에 대한 입장은 다른 경우도 있으므로 추가 검토가 필요해 보인다. 이러한 결과를 토대로 향후 실무적으로 참조가 되기를 기대한다.

본 논문은 CFD 해석법을 이용하여 사고 선박의 손상부 형상에 따른 기름 유출량 변화를 예측하고, 이론 추정식에서 이를 고려 할 수 있는 방출계수 도출 결과를 소개한다. Froude수와 Reynolds수 상사를 만족하는 조건에서 다상유동 해석법을 사용하여 모형선 크기의 기름 유출 문제를 다루었다. 수치해석 결과는 알려진 실험 결과와 비교하여 검증하였다. 수학적 형상들로 정의한 손상부 형상의 변화와 함께 손상부 가로세로비와 기름탱크 두께의 변화가 기름 유출 유동에 미치는 영향을 조사하였다. 보다 현실적인 상황을 고려하기 위해 손상부의 찧어진 철판의 영향에 대한 해석도 포함하였다. 수치해석 결과를 통해 사고 선박의 손상부 형상에 따른 기름 유출량의 변화를 확인하였으며, 다양한 손상부 형상이 가지는 점성 영향을 방출계수로 정량화하여 추출하였다. 본 논문에서 제시하는 방출계수에 대한 검 증을 위하여 알려진 기름 유출량 주정식에게 적용하였으며, CFD 해석과 좋은 일치를 얻었다.