September 2014 and March 2015 at the three sites (PD-1, PD-2 and PD-3) of Lake Paldang. Nitrogen and phosphorus concentrations were higher at PD-2 than at PD-1 and PD-3. TSI (TN) values at the three field sites were in the range of 65~85, which were the level of eutrophic or hypereutrophic state. TSI (TP) also showed high values (49~68), which were the level of mesotrophic or eutrophic state. Akinete germination potential was higher at PD-2 with increased nutrient (nitrogen and phosphorus), and algal growth potential also increased with nutrient enrichment.

본 연구는 과일류의 방사선 조사 여부를 검지하기 위해서 생물학적 방법인 발아법으로 방사선 조사여부를 확인하였다. 과일류는 사과, 오렌지, 그리고 레몬으로 0.1, 0.3, 0.5, 0.7, 1.0 kGy의 조사선량으로 방사선 조사하고 7일 동안 순의 길이를 측정하여 방사선 조사에 의한 발아 특성을 살펴보았다. 모든 시료는 7일 동안 지속적인 길이 성상을 하였지만, 방사선 조사에 의해서 길이 성장이 억제되어 3일에서 5일부터는 순의 길이에 유의적인 차이를 보이지않았다. 사과를 제외하고, 오렌지는 5일째 자자 비조사 시료는 0.5 cm이상 길이를 보여 비조사 시료와 조사 시료의 구분이 가능하였다. 레몬은 발아 5일째 0.2 cm 이하의 길이를 보여 비조사 시료와 조사시료의 구분이 가능하였다. 또한 오렌지와 레몬는 B일부터 길이 성장정도가 현저히 낮아지고 발아 5일동안 비조사 시료의 성장성토가 가상 큰 것으로 나타났다. 과일류의 방사선 조사여부는 발아 7일 동안 순 길이의 유의적인 길이성장과 비조사 시료와 조사 시료들의 성상정도를 측정함으로써 확인 가능하였다.

Contaminated soils and water by heavy metals have posed a serious threat to environment and human health, which can be solved by both physicochemical and biological methods. Phytoremediation has recently become a topic of scientific research and gained much attention as a cost-effective and eco-friendly alternative. Many kinds of hyperaccumulator plants have been applied to deal with heavy metal contaminants such as As, Cd, Pb, Zn and various radionuclides. In recent study, a seedling vigor index (SVI) model, which uses specific hyperaccumulator plants (i.e., sunflower) as test subjects, is proposed to predict the phytotoxicity of heavy metals. However, whether this mathematical model can be commonly used has not been cleared yet. In this study, rapeseeds were treated with Cd, Pb, Ni, Zn to validate the SVI model which was proposed by some scholars previously. The phytotoxicity of heavy metal was evaluated using seed germination test and seedling length measurement. The test shows that germination percentage and seedling length decreased when heavy metal concentration increased. According to the results of regression analysis, heavy metal concentration is linear to germination percentage, root and shoot length, corresponding with SVI model. It can be concluded that the SVI estimation model obtained from sunflowers can also be applied to rapeseeds to describe the relative effects of heavy metal concentration on plants growth and development.. However, further experiments using more hyperaccumulator plants to validate the applicability of the SVI model are necessary.

The objective of this study was to evaluate quality properties, including amylopectin content, and texture analysis of brown rice and germinated brown rice cultivars in Korea for rice processing products. The amylopectin short chain content of germinated brown rice was significantly higher than that of brown rice. Texture analysis test showed that germinated brown rice Jinbo had the lowest hardness and toughness as well as and highest stickiness and adhesiveness. The correlation between degree of polymerization of amylopectin and texture analysis was also evaluated. In particular, germinated brown rice, short-chain amylopectin showed a negative correlation with hardness and toughness, whereas long-chain amylopectin showed a positive correlation with hardness, toughness, and adhesiveness. These results indicate that there is a relationship between degree of polymerization and texture analysis.

담배육묘작업의 성력화 및 기계화를 위한 1차적인 시도로써 미세한 담배종자를 수종의 점토광물로 분말 피복하여 대형화하는 방법을 연구하였으며, 그 결과를 요약하면 다음과 같다. 1. 사문석분말을 피복재료로 이용한 결과 매우 균일하게 조립되어 동일립경이 90%이상이었고, 적중율(종자함유율)도 95%이상이었으며 조립시간도 짧았고 수율도 가장 좋았다. 그러나 경도가 약해서 쉽게 파괴되는 것이 단점이었다. 2. 사문석분말피복에 의한 단점을 개선하기 위하여 내시를 사문석분말로 1차 피복한 후, 외시을 경도가 강한 제오라이트로 이중피복하였던 바 경도가 보완되었다. 3. 발아일수 및 발아율에서 이중피복 종자와 무피복종자 사이에 큰 차이가 없었다.