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        검색결과 4

        1.
        2025.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This study evaluated the effects of solid and water-soluble extracts derived from torrefied Pinus densiflora on lettuce (Lactuca sativa) germination and growth, as well as the cultivation efficiency of torrefied materials combined with plant nutrient solutions. Torrefied samples were prepared under various conditions (200°C, 220°C, 240°C for 20–80 minutes) and mixed with sand at ratios from 20% to 100%. Liquid extracts were formulated with macronutrients (N, P, K, Mg) and micronutrients (Mn, B, Fe, Cu) and applied to leafy and root vegetables. Germination tests showed that 60% and 80% torrefied treatments had the highest and most consistent rates, with torrefied samples promoting more rapid and stable germination than controls. A two-way ANOVA indicated a significant interaction between treatment and concentration (p = 0.043), suggesting concentration-specific effects. While shoot length showed no significant difference, root growth was marginally significant (p = 0.064), with washed torrefied material producing the longest roots. Physical analysis revealed that torrefied materials improved soil thermal retention and moisture-holding capacity. However, increasing torrefied content reduced porosity, likely due to fine particles filling soil pores. In conclusion, torrefied P. densiflora materials exhibit strong potential to enhance germination, root development, and soil condition. Optimal results were achieved with 40–60% solid mixtures for germination and 60–80% diluted extracts for rapid and consistent seedling growth. When optimally applied, they may serve as effective, sustainable amendments in cultivation systems.
        4,200원
        2.
        2017.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In this study, the appearance change and the heat․moisture transfer properties of knitted fabric by yarn shrinkage were examined to obtain useful data on the development of thermo-sensitive functional materials. Eleven types of knitted fabric were knitted using highly bulky acrylic-blended yarn. After shrinking the specimens using dry heat treatment, the appearance change and thickness were measured. An HEC simulator was adopted for measuring the heat․moisture transfer properties of specimens by yarn shrinkage. When holes were arranged vertically in the mesh structure, the specimens with 2,500 and 5,000 holes showed high percent change of hole area, appearance, and thickness. When holes were diagonally arranged in the mesh structure, the percent change of hole area in the specimen with 1,250 holes was larger than the one with 2,500 holes. However, the dimensional stability of the specimen with 2,500 holes was better because of its smaller appearance and thickness change. In the tuck structure, the percent change of hole area in the specimen with 625 and 416 holes was relatively large compared with the appearance and thickness change. Furthermore, the hole size in the tuck structure was smaller than that in the mesh structure but the percent change of hole area was larger. Therefore, it was proved that the tuck structure is more suitable than the mesh structure for developing thermo-sensitive functional materials. Heat․moisture transfer property test verified that the change of hole area by yarn shrinkage enabled obtaining the thermal effect due to the distinct temperature difference in the inner layer.
        4,500원
        4.
        2007.06 KCI 등재 서비스 종료(열람 제한)
        Demand for high quality rice has always been a major factor in the international rice marketing. In the present study, doubled haploid (DH) population derived from anther culture of a Tongil/japonica hybrid was used for genetic analysis of rice grain quality. The average values of DH lines for grain weight, grain length and the ratio of grain length to width were near the mid-parent value. More than 40% DH lines showed transgressive segregation for grain weight, length, amylose and lipid content, but less than 10% DH lines observed on ratio of length to width and grain thickness were transgressive segregation. Correlation analysis between appearance qualities and physicochemical characters indicated that grain width and grain thickness both significantly and negatively correlated to protein and lipid content. A highly significant negative correlation between protein content and amylose content was observed.