A total of 87 kinds of dried sweet potato products from Korea, China, and Japan were collected to compare dried sweet potatoes' quality characteristics for preparing CODEX. The characteristics of Aw, moisture, and reliable soluble content, color, and hardness were analyzed using Principal Component Analysis. The moisture content varied from country to country in order of Korea (21%), China (20%), and Japan (25%). In terms of color, Chinese products were dark and red compare to Korean and Japanese. Chinese products had a wide distribution of quality characteristics in common, so the product quality was not uniform. As a result of the PCA analysis, 67.2% of the total variance was explained. The first component evaluated the degree of the drying progress and the second component evaluated the appearance of the product, how it was bright and yellow. Based on the first component, Japanese, Korean and Chinese products were placed from the left, so the drying degree varied from country to country. Japanese products were the softest, Chinese products were hard, and Korean products were moderately hard. In conclusion, the moisture and reliable soluble content, color, and hardness of the dried sweet potato are essential quality factors, and they are expected to help identify the primary quality elements of sweet potato in neighboring countries.

This study aimed to investigate the effect of storage temperature and pressure plate treatment on chemical composition in Prunus mume sugar extracts (PSEs). Green Prunus mume fruit was mixed with an equal amount of commercial sugar and stored at 4 or 25oC for 9 mon with or without a pressure plate. The alcohol contents in PSEs stored at 4oC were lower than those stored at 25oC. The amygdalin contents in PSEs stored at 25oC with pressure plate were significantly low. The sucrose in PSEs was converted into glucose and fructose during storage. The glucose, fructose and total phenol contents in PSEs stored at 25oC were higher compared with those at 4oC. The total soluble solid and polyphenol contents in PSEs were increased at 25oC until 90 d and 4oC until 150 d and then the contents were constant. The total acidity in PSEs stored at 4oC were higher than those at 25oC. These results indicate that storage temperature plays an important role in controlling the alcohol, amygdalin and sucrose contents in Prunus mume sugar extracts (PSEs).

The effects on the size selectivity for Muraenesox cinereus caught by coastal longline fishery were investigated in the southern coast of Korea from June 2 to 17, 2019. Four sizes of hooks (sizes 15, 17, 18 and 19) and two sizes of bait (sizes 9.9 g and 18.3 g) were tested in seven and three fishing trials, respectively. Such results revealed that smaller hook and bait size improved capture efficiency. And our results demonstrate that there was no significant size selectivity effect for hook size (ANOVA, p>0.05), but small bait improved on catching smaller fish (ANOVA, p<0.05).

This study examined the combined effects of high hydrostatic pressure (HHP) and micro-perforated (MP) film packaging on the microbiological and physicochemical qualities of kimchi sauce stored under fluctuating temperature conditions. Before storage, treatment with 600 MPa HHP reduced the total lactic acid bacteria in the sauce samples to below the detection limit (1 log CFU/g). After 68-day storage, ten microbial strains isolated from the non-treated controls were identified as Pediococcus pentosaceus, whereas eight microbial strains isolated from the HHP-treated samples were identified as Bacillus spp., regardless of the packaging type. Additionally, the samples treated with HHP and packaged in a multilayer film bag (ML-HPP), as well as those in the MP-HHP group, exhibited higher pH values and reduced sugar content than the ML-control or MP-control after 68-day storage. No significant differences were observed between the control and treatment groups regarding their electrical conductivity, salinity, and CIE a* values at the end of storage. However, there was no O2 reduction or CO2 accumulation in the MP-HHP group after 68-day storage. These results indicate that the combination of HHP treatment and MP-film packaging can extend the kimchi sauce's shelf life without packaging expansion during long-term storage.

이 연구의 목적은 최근에 관심이 증대가 되고 있는 조직내 저성과자를 활성화 하기 위한 방안으로 조 직내 진급 경과자의 성과인식, 잡 크래프팅 및 직무만족 간의 구조적 관계를 규명하고, 성과인식과 직무만 족 간에 잡 크래프팅의 매개효과를 검증하고자 하였다. 연구대상은 군 조직에서 대령을 진급하지 않은 진급 경과자이며 132부의 설문을 사용하였다. 연구방법 및 절차는 SPSS 19.0과 AMOS 22.0을 사용하였고, 타당도 및 신뢰도 분석, 인구통계 및 기술통계와 상관 관계 분석, 구조방정식 분석을 실시하였다.연구 결과, 첫째, 연구모형인 성과인식, 잡 크래프팅 및 직무만족 간의 구조적 관계가 있음을 확인하였 으며, 둘째, 진급 경과자의 성과인식은 직무만족에 정(+)적 영향을 끼쳤으며, 세째, 진급경과자의 성과인 식과 직무만족 간에 잡 크래프팅은 부부매개효과 있음 확인하였다. 연구 결과를 바탕으로 다음과 같은 결론을 도출하였다. 첫째, 이 연구의 연구모형은 진급 경과자의 성 과인식, 잡 크래프팅 및 직무만족과 관련된 현상을 종합적으로 설명하는데 적합하도록 설정되었다. 둘째, 진급경과자의 성과인식은 직무만족에 정(+)적인 영향을 끼침으로 해당조직에서는 조직 및 집단 차원에서 진급 경과자가 본인의 성과인식을 높일수 있고 또한 상사 및 동료들이 진급 경과자에게 성과인식을 높을 수 있는 지원 등을 향상시킬 수 있는 방안을 연구해야 한다. 셋째, 진급 경과자의 잡 크래프팅이 직무만족에 미치는 정(+) 영향을 미치며 성과인식과 직무만족 간에 부분매개 효과가 있는 것으로 나타났음으로 해당조직의 조직 및 집단 차원에서 잡 크래프팅을 높일 수 있는 환경 등을 조성할 필요가 있다. 이 연구의 제언으로 첫째, 진급 경과자의 대상을 확대하고(소령에서 중령 진급 경과자, 부사관의 진급 경과자 등) 또한 다른 부대 및 기관에도 적용할 필요가 있다. 둘째, 진급 경과자의 잡 크래프팅 활동에 영향을 주는 환경적 변수 및 인구통계학적 변수를 추가적으로 탐색할 필요가 있다.

본 연구에서는 기능성 화장품의 소재로서의 금전초(Lysimachia christinae Hance)의 항산화와 항주름 효과를 조사하였다. 최근 천연물의 주름 개선 개발의 연구가 지속적인 관심을 받고 있어 본 연구를 통해 활성산소종(reactive oxygen species, ROS) 생성과 pro-collagen 합성 및 MMPs의 연관성에 대해 알아보았다. 금전초는 70% 에탄올(LcHE)과 열수(LcHW)로 각각 추출하여 실험을 진행하였다. HaCaT cells에서 LcHE가 LcHW보다 ROS 저해효능이 더 우수하고 세포독성 결과 250 μg/mL 농도 까지 독성을 보이지 않아 LcHE를 선택하여 주름 개선 소재연구를 진행하였다. pro-collagen 합성실험을 통하여 UVB에 의해 감소된 type-1 pro-collagen의 합성 활성을 유의미하게 확인하였다. Western blot 실험을 통하여 피부세포에서 UVB에 의해 유도된 MMPs 중 MMP-1 -3 -9의 증가를 억제함을 확인하였으며, Real time PCR을 통하여 상위단계인 mRNA levels에서도 MMP-1, MMP-2, MMP-3, MMP-9의 mRNA levels가 농도 의존적으로 유의미한 감소를 보여 추출물의 효능을 확인하였다. 위의 실험결과에 따라 UVB에 의한 주름생성과 피부 광노화를 효과적으로 예방할 수 있는 화장품의 천연소재로서의 이용이 기대된다.

n-Nonane, 1¸2¸4-trimethylbenzene (124-TMB), toluene, total xylene (TXYL), isopropyl alcohol (IPA), and methyl ethyl alcohol (MEK) are major volatile organic compounds (VOCs) emitted from printing industries. The absorption amount of a single VOC per unit weight of silicone oil was as follows in the order of 189.5 g/kg-silicone oil for n-nonane, 91.7 g/kg-silicone oil for 124-TMB, and 60.1 g/kg-silicone oil for TXYL. Although hydrophobic VOCs were more absorbed in silicone oil than hydrophilic VOCs such as IPA and MEK, IPA and MEK, which had log Kow values of 1 or less, also were absorbed more than 26.0 g/kg-silicone oil. In two and three mixed VOCs of n-nonane, 124-TMB, and toluene, the absorption amount of each in silicon oil was less than that of single a VOC. The total absorption amount of two mixed VOCs ranged from 47.9 g to 138.7 g/kg-silicone oil, and the total absorption amount of three mixed VOCs was 65.8 g/kg-silicone oil. These results suggest that silicone oil is a promising pretreatment solution capable of absorbing high concentrations of VOCs that are intermittently emitted from printing industries. The absorption information of VOCs obtained in this study can be used as the design parameters of a damping device for the pretreatment of VOCs.