http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Growth and Yield of Double Cropping Potatoes Produced Using Seed Tubers of Different Types and Sizes
박현진,이규빈,박영은,조지홍,최장규,서진희,천충기,장동칠 한국작물학회 2021 Korean journal of crop science Vol.66 No.4
For stable cultivation in double cropping, it is important to use potato (Solanum tuberosum L.) cultivars with a short dormancy period of 50–70 days and plant seed tubers of appropriate type and size. An experiment was conducted during 2018 –2019 to investigate the effects of seed tuber type and size on growth and yield performance in double cropping. Whole tubers of three sizes (10–20 g, 30–40 g, and 50–60 g) and conventional cut tubers weighing 30–40 g from three cultivars with different dormancy periods, namely ‘Daeji’ (40–60 days), ‘Eunsun’ (50–60 days), and ‘Saebong’ (50–80 days), were planted, and their field performance was compared. Regardless of the cultivar, the increase in the whole tuber weight up to 30–40 g led to fast emergence, thereby increasing ground cover rate, shoot growth rate, and tuber growth rate, which ultimately improved tuber yield by 33–54%. Comparing the whole and cut tubers, ‘Daeji’ and ‘Eunsun’ showed similar growth and yield performance; as such, the performance of whole tubers weighing 10–20 g was comparable to that of cut tubers weighing 30–40 g. However, ‘Saebong’, a cultivar with relatively long dormancy period, performed better with cut tuber than with whole tubers. Based on these results, we recommend the use of whole tubers weighing over 30 g for double cropping. Further studies to break tuber dormancy are warranted in cultivars with relatively long dormancy periods (50–80 days), such as ‘Saebong’.
박현진,정병용,박명환 대한인간공학회 2023 大韓人間工學會誌 Vol.42 No.5
Objective: This study aims to systematically analyze the factors influencing subjective musculoskeletal pains by comprehensively considering the exposure duration of physical, biochemical, and ergonomic hazards among construction workers. Background: Construction workers are exposed to a variety of hazard factors, including not only chemical and biological hazards but also physical and ergonomic hazards. Method: The study analyzed survey data of 910 construction workers in South Korea from the 6th Korean Working Conditions Survey (KWCS) using binary logistic regression analysis, with worker characteristics and levels of exposure to hazard factors as independent variables and musculoskeletal pains, specifically back pain, upper limb pain, and lower limb pain as dependent variables. Results: The prevalence of upper limb pain complaints among workers was high at 43.5%, followed by 34.5% for back pain and 22.3% for lower limb pain. According to the results of binary logistic regression analysis, the worker characteristics influencing musculoskeletal pains were age, temporary employment status, and weekly working hours. Temporary employment status had an impact on all types of musculoskeletal pains, while increasing age was a factor for both back pain and upper limb pain. On the other hand, lower limb pain was influenced by weekly working hours. As for the hazard factors, exposure to ergonomic hazards such as manual heavy loads handling, awkward posture, and repetitive motion were found to affect the musculoskeletal pains. And among physical hazards, exposure to vibrations was identified as an influencing factor. The exposure to manual heavy loads handling affected all types of musculoskeletal pains, while the exposure to awkward posture affected back pain and lower limb pain. The exposure to repetitive motion affected lower limb pain and upper limb pain. In contrast, the exposure to vibration was associated with upper limb pain. Conclusion: Musculoskeletal pains among construction workers were influenced by ergonomic hazards such as exposures to manual heavy loads handling, awkward posture, and repetitive motion. Additionally, exposure to vibrations was found to affect upper limb pain. Application: This study can be applied to derive preventive policies by identifying the factors on musculoskeletal pains among construction workers through comprehensive consideration of hazard factors.
박현진,김은정,이태호,박시현,최장덕,문귀임 한국축산식품학회 2023 한국축산식품학회지 Vol.43 No.5
The objective of this study was to establish a multi-residue quantitative method for the analysis of anthelmintic and antiprotozoal drugs in various livestock products (beef, pork, and chicken) using ultra-high-performance liquid chromatography–tandem mass spectrometry. Each compound performed validation at three different levels i.e., 0.5, 1, and 2× the maximum residue limit according to the CODEX guidelines (CAC/GL 71- 2009). This study was conducted according to the modified quick, easy, cheap, effective, rugged, and safe procedure. The matrix-matched calibrations gave correlation coefficients >0.98, and the obtained recoveries were in the range of 60.2%–119.9%, with coefficients of variation ≤32.0%. Furthermore, the detection and quantification limits of the method were in the ranges of 0.03–3.2 and 0.1–9.7 μg/kg, respectively. Moreover, a survey of residual anthelmintic and antiprotozoal drugs was also carried out in 30 samples of beef, pork, and chicken collected in Korea. Toltrazuril sulfone was detected in all three samples. Thus, our results indicated that the developed method is suitable for determining the anthelmintic and antiprotozoal drug contents in livestock products.
박현진,이강우,김수빈,우은진,김희진,허경석 대한체질인류학회 2021 대한체질인류학회 학술대회 연제 초록 Vol.64 No.-
두덩결합면은 연령을 추정할 때 가장 많이 이용되는 뼈대 중 하나이다. 연령에 따른 표면 변형 특징을 여려 유형으로 분류하여 연령을 추정할 수 있게 하였지만 사람에 따라 다르게 판단할 수 있어 정확도와 신뢰도가 높지 않다. 컴퓨터 분석을 이용한 ForAge 프로그램(플로리다 주립대학 계산과학부)은 두덩결합면의 고르지 않은 정도를 수치화한 Slice and Algee-Hewitt (SAH) 점수를 이용하여 연령을 추정하는 프로그램이다. 이 프로그램은 백인을 기준으로 회귀식을 도출했기 때문에 한국인 두덩뼈에서의 연령추정에 대한 신뢰도에 대한 검증이 필요하다. 따라서, 본 연구의 목적은 ForAge 프로그램을 이용해 한국인 두덩뼈에서의 연령추정값과 실제 연령을 비교하고, 한국인 표본을 대상으로 새로운 회귀식을 도출하는 것이다. 본 연구를 위하여 한국성인 시신 17구의 두덩뼈 30쪽(남성 쪽, 여성 쪽)을 사용하였고, 평균나이는 82.8세(66~93세)였다. 각 두덩결합면은 Artec Space Spider 스캐너(Artec3D, 룩셈부르크)를 이용하여 3차원으로 촬영하였다. ForAge 프로그램 내의 회귀식 계산을 통한 한국인 표본의 연령추정값과 실제 연령의 평균 제곱근 편차(root mean square error)는 23.45세로 비교적 낮은 신뢰도를 보였다. 따라서, 한국인에 적합한 두덩뼈를 이용한 연령추정의 새로운 회귀방정식이 필요하였다. 이를 위하여 통계 분석 프로그램인 SPSS Statistics를 이용해, 한국인 두덩결합면을 기준으로 SAH 점수를 적용하여 다음과 같은 회귀식을 도출했다. 추정연령 = 55.486 × (SAH 점수) + 65.657 별도의 검증 데이터(남성 7구, 여성 4구, 19쪽, 68~96세)의 해당 회귀식의 평균 제곱근 편차는 8.497이었고, 회귀식에 대한 R<sup>2</sup> 값이 0.167이었다.