강유전체 재료의 하부전극으로 사용되고 있는 Pt/Ti 박막의 접착력에 대한 열처리 분위기의 영향을 연구하였다. 시편의 접착력은 90˚ 필 테스트 방법을 사용하여 정량적으로 측정하였다. 열처리 후 사용된 분이기에 관계없이 모두 접착력이 감소하였는데 특히 산소분위기에서 열처리 한 시편의 접착력이 매우 크게 감소하였다. AES depth profile과 단면 TEM을 이용하여 계면반응을 관찰한 결과 산소열처리시에는 Ti가 외부에서 확산해 온 산소와 반응하여 rutile TiO2상이 형성됨을 알 수 있었다. 그러므로 산소열처리 후에 일어나는 접착력의 급격한 감소 원인은 열처리시 취약한 TiO2상이 형성되며 이로 인해 Ti 접착층이 고갈되기 때문임을 알 수 있었다.

진공증착법으로 제작한 V2O5 박막의 두께 및 결정성에 따른 전기변색 특성을 체계적으로 조사하였다. 증착된 박막은 노란색을 띄고 있었으며 140˚C 보다 높은 기판온도에서 증착된 V2O5 박막은 결정질로 낮은 기판온도에서 증착된 박막들은 비정질로 밝혀졌다. 리튬 이온 주입에 따른 V2O5 박막의 광 변조 특성 결과 V2O5 박막의 두께와 결정성에 관계없이 300~500nm 파장영역에서는 산화발색이 500~1100nm 파장영역에서는 환원 발색이 나타났다. 비정질과 결정질 Lix V2O5 박막의 optical band gap 에너지는 리튬 이온 주입양이 증가함에 따라 (x=0.0~0.6) 각각 0.75 [eV], 0.17 [eV]씩 높은 에너지쪽으로 이동하였다. 비정질 Lix V2O5 박막의 coloration efficiency는 근적외선 영역에서는 리튬 이온 주입과 박막두께에 따라 거의 변화가 없었으나 blue와 near-UV 영역에서는 absorption edge가 500nm 파장근처에서 높은 에너지 부근으로 이동됨으로 인하여, 박막두께가 증가하고 리튬 이온주입양이 감소할수록 coloration efficiency가 상당히 증가하는 것으로 나타났다. 그러나 결정질 Lix V2O5 박막의 경우 coloration efficiency는 전파장영역에서 리튬 이온 주입양과 박막두께에 거의 영향을 받지 않는 것으로 밝혀졌다.

3000Å~6000Å의 두께로 진공 증착한 WO3 박막의 광특성 및 일렉트로크로미즘에 대하여 연구하였다. 증착된 WO3 박막은 모두 무색 투명 하였으며 X-선회절 분석결과 비정질 상태로 밝혀졌으며, 비정질 WO3 박막의 굴절율은 가시광선 영격에서 1.9-2.1로, 광에너지 gap은 3.25eV로 나타났다. ITO투명전극/WO3박막/LiCIO4 ~propylene carbonate/백금 대향전극 구조를 갖는 일렉트로크로믹소자를 구성하여 일렉트로크로믹 특성을 조사하였다. WO3 박막의 coloration/과 bleaching현상은 LiCIO4~propylene carbonate유기전해질과 ITO투명전극으로 부터 Li+이온과 전자의 이중주입에 의하여 청색으로 나타났으며, 가역적으로 전기 화학적인 산화반응에 의하여 bleaching현상이 일어났다. Coloration과 bleaching현상, 광학밀도, 구동전압 및 응답속도 등의 일렉트로크로믹 특성은 WO3 박막의 증착조건, 전해액 농도, 투명전극의 sheet resistance 인가전압에 크게 의존하는 것으로 밝혀졌다.

우리나라의 임업(林業)과 일본(日本)의 임업상황(林業狀況)을 검토해본 결과 양국은 같은 경향을 나타내었는데 다음과 같았다. 1. 삼림면적(森林面積)과 축적(蓄積)을 보면 삼림면적(森林面積)에 있어서 인구1인당(人口1人當) 세계평균(世界平均)은 0.96ha인데, 한국(韓國) 0.16ha, 일본(日本) 0.23ha로서 충분(充分)치 못하며 축적(蓄積)에 있어서는 1인당(人當) 한국(韓國) , 일본(日本) 이지만 1인당(人當) 목재소비량(木材消費量)은 한국(韓國) , 일본(日本) 로서 양국은 삼림자원(森林資源)이 풍부하지 못하다. 2. 임업생산(林業生産) 활동(活動)은 점차 심체(沈滯)되고 있다. 한국(韓國)이나 일본(日本)이나 다같이 조림면적(造林面積)과 입목벌채면적(立木伐採面積)이 점차 감소(減少)하고 있다. 현재(現在) 인공림률(人工林率)은 전삼림면적(全森林面積)의 한국(韓國) 28%, 일본(日本) 40%이다. 3. 목림수요량(木林需要量)에 대(對)하여 외재율(外材率)은 한국(韓國) 79%, 일본(日本) 62.4%이다. 또한 목재가격지수(木材價格指數)는 일반물가지수(一般物價指數)보다 낮아서 목재관련산업(木材關連産業)의 부진(不振)이 예상(豫想)된다. 4. 농촌노동력(農村勞動力)의 감소(減少)로 인(因)하여 임업노동자(林業勞動者)의 확보(確保)는 더욱 어렵다. 5. 국유림(國有林)의 경영(經營)은 한국(韓國), 일본(日本) 다같이 적자(赤子)운영을 하고 있다. 이상과 같은 결론(結論)은 임업생산(林業生産) 기반(基盤)이 빈약하기 때문이므로 보다 많은 지속적(持續的)인 투자(投資)가 필요(必要)하다고 생각한다. 또한 국토보전적(國土保全的)인 면(面)에서도 투자(投資)되어야 한다고 본다.

경상북도(慶尙北道) 지역(地域)을 중심(中心)으로 송이버섯 발생지(發生地)의 추이(推移)를 파악할 수 있는 자료를 수립(樹立)하기 위하여 송이버섯 생산지(生産地)의 분포도(分布圖)(Fig 1)과 그 위도적(緯度的) 분포(分布)(Table 1)를 작성(作成)하였다. 경상북도(慶尙北道) 동북(東北)쪽에 위치(位置)하고 있는 울진군(蔚珍郡), 영덕군(盈德郡), 영양군(英陽郡), 봉화군(奉化郡)에 비교적 균일한 분포(分布)를 나타내었고, 문경군(聞慶郡), 상주군(尙州郡), 예천군(醴泉郡), 영풍군, 의성군(義城郡), 달성군(達城郡), 경산군(慶山郡), 청도군(淸道郡)에는 일부지역에서 발생(發生)하고 있었으며, 금릉군(金陵郡), 성주군(星州郡), 칠곡군(漆谷郡), 월성군(月城郡), 선산군(善山郡), 경산군(慶山郡) 지역(地域)에서는 거의 발생(發生)하지 않고 있음을 알 수 있었다. 전체적(全體的)인 송이버섯 발생(發生)의 경향은 소나무 임지(林地)의 분포(分布)나 임분(林分)의 건전도(健全度)에 밀접한 영향을 띠고 있었으며, 송이버섯 발생지(發生地)의 면적(面積)을 각군별(各郡別)로 그 수를 헤아려 보면(Table 1) 울진군(蔚珍郡) 117개소(個所), 영덕군(盈德郡) 70개소(個所), 영양군(英陽郡) 54개소(個所), 문경군(聞慶郡) 38개소(個所), 청송군(淸松郡) 37개소(個所), 안동군(安東郡) 35개소(個所), 상주군(尙州郡) 32개소(個所), 봉화군(奉化郡) 26개소(個所), 영풍군 22개소(個所), 영일군(迎日郡) 17개소(個所), 영천군(永川郡) 15개소(個所), 의성군(義城郡) 15개소(個所), 경산군(慶山郡) 10개소(個所), 군위군(軍威郡) 9개소(個所), 청도군(淸道郡) 6개소(個所), 예천군(醴泉郡) 5개소(個所), 선산군(善山郡) 4개소(個所), 달성군(達成郡) 3개소(個所), 칠곡군(漆谷郡) 2개소(個所) 월성군(月城郡)의 경우 1개 개소에서 송이버섯 발생(發生)하고 있었으며 전혀 발생(發生)하지 않는 지역(地域)도 있었다.

The direction of scientific researches on tree improvement and forest management in several universities and research institutes in Japan can be summarized as follows: They put a great emphasis on sugi, Cryptomeria japonica and cypress, Chamaecyparus oblusa which are two major conifer species largerly planted in the Japanese forestry. In the research of sugi, a great concern has been made in evaluating inheritance of forest tree, quantitative characters and genetic parameter of growth, and in breeding for resistance to diseases and insects and to all the natural calamities. Interaction between environmental conditions and genetic nature of tree can be concerned factors in relation with forest damage, together with silvicultural conditions and pest infestation. Selfing hybrids of made from crossing twisted-leaf sugi, defomity leaf type and midori sugi, normal leaf type segregated the normal needle, twisted needle, green leaf and albino leaf type. It seemed that separation of many defomity individuals can be governed by two dominant complementary genes and from the near loci of which it was detected lethal genes. 52% of Japanese forestry is occupied by the small forest landowners like Korean forestry. This made difficulty for forest improvement such as progressive afforestation and for capital accumulation form forestry. The Forest Corporation was established at first in 1959 to aming at productive forestry structure and forest management, and afforestation. For these purpose, 35 Forest Corporations are at moment operating throughout Japan. However, investment in forestry business becomes less attractive since the wage in forest production duction increased in higher trend. than timber price. Therefore, an artifical afforestation becomes yearly decreased. At present. the self-sufficient rate of timber production in Japan is about 35%, and so a great effort is being made to increase self-sufficient rate of timber production.

기후변화 적응과정에서 도입 작물의 국내 재배실태를 조사하고 대응과제를 도출코져 본 연구를 수행하였으며, 그 결과는 다음과 같다. 도입 열대·아열대 채소 재배현황(2015년 기준)은 18작목으로 재배농가수는 920농가, 재배면적은 321 ㏊로 조사 추정되었고, 재배면적이 많았던 작물은 울금, 여주, 아스파라거스, 삼채, 허브류 순이었다. 도입 열대·아열대 과수류 재배현황은 2015년 국내재배 농가수와 재배면적은 264농가 106.5㏊로 추정되며, 전년대비 각각 51.7%와 83.7% 증가하였다. 도입 특약용작물 재배현황(2015년 기준)은 10작물로 753농가에서 재배면적 276.3 ㏊로 조사 되었으며 재배면적이 많았던 작물은 강황, 감초, 마카, 모링가, 포포나무 순이었다. 도입 열대· 아열대 작물의 국내 재배가 안정적으로 정착되기 위해서는 국내 재배적응성 검정에 의거 재배환경면에서의 안전성과 경제성이 있어야 하며, 생산물의 이용과 유통 및 판로의 확보 문제, 외국현지 수입산과의 경쟁력 등을 고려할 필요가 있고, 국가 간 이동에 따른 생물다양성협약 등 국제협약 및 국내 종자산업법에 의하여 도입되어야 할 것이다.

상온에서 남동석(Cu3(CO3)2(OH)2)에 대한 고압 거동 연구를 하였다. 대칭형 다이아몬드 앤빌기기를 이용하여 21.52 GPa까지 압력을 증가시키면서 각분산 X-선 회절법과 방사광을 이용하여 고압회절 데이터를 얻었으며, 시료에 가해준 압력은 루비 형광파의 파장 변화를 측정하여 결정하였다. 본 실험에서 시행한 압력의 범위 내에서 상변이는 관찰되지 않았으며, 정압상태에서 체적탄성률(K0)은 K0’이 4일 때, 54.4 GPa로 계산되었다. 상온상태에서 얻은 남동석의 체적탄성률에 대한 신뢰도를 정규화압력 및 정규화응력변형 분석을 통해 검증하였다.

Background: For stable induction of tetraploidy in Fallopia multiflora Haraldson, colchicine was treated to establish the condition of induction and investigated the morphological and cytogenetic traits of the tetraploid plants obtained compared to those of diploid ones. Methods and Results: For the induction of tetraploidy, F. multiflora plants were soaked in aqueous solutions of colchicine at various concentration (0.1, 0.5, and 1.0%). After this, 2% dimethyl sulfoxide (DMSO) was added at room temperature on a shaker set at 150 rpm for periods of 12, 24, and 48 h. The induction rate of tetraploids appeared to be the highest in plants treated with 0.5% colchicine for 24 h. As the colchicine concentration and soaking time increased above these levels, the growing tip of the roots did not develop and they began to rot. When compared to diploid plants, tetraploids differed greatly in various characteristics, including the sizes and shapes of the leaves, fruits, flowers and roots. The induced tetraploid F. multiflora had larger guard cells, and chloroplasts, increased number of chloroplast in the guard cells and decreased stomatal densities. Conclusions: When colchicine induced plants for tetraploid, it can be distinguished from diploids, in various characteristics such as morphological changes as stomatal size, number of chloroplasts per guard cell, number of chromosomes and flow cytometry. Therefore, it proved that these methods are suitable, quick and easy methods for the identification of the ploidy level of F. multiflora.

Background : This study provides Profitability Analysis information on Baeksoooh (Cynanchum wilfordii), One of the Crops excluded from the production cost survey. and it will contribute to increase the income of farmers. The purpose of this study was to survey and analyse the farm business performance of new economic crops cultivated in small area. Method and Results : In this study, we selected Baeksoooh, which is also called Baekhasuo, as a subject of investigation, based on the roots of C. wilfordii Hemsley. We visited 20 farmers who cultivated Baeksoooh in Jecheon, we surveyed the quantity, price of farmhouse receipts, cost of each branch, the status of agricultural machinery and facilities, and We analyzed income, operating expenses, and income per unit area. and also We set up a proper management model. It can be cultivated in all regions of Korea, but it is the main production area of Jecheon in Chungcheongbuk-do under the cool climate conditions. Most are being traded for medicinal uses. Looking at the profitability per 10a by Baeksooh's business performance, The result of this study are follows as. In the case of the top 20% farms, the gross quantity of the C. wilfordii is 332 ㎏ per 10a, the gross income was 11,418, managing cost was 2,259, income was 9,158 thousand won per 10a. In the average farms surveyed, the gross quantity of the C. wilfordii is 205 ㎏ per 10a, the gross income was 4,611, managing cost was 2,418, income was 2,193, production cost was 3,169 and net income was 1,445 thousand won per 10a. In the lower 20% farms cultivation, the gross quantity of the C. wilfordii is 46 ㎏ per 10a, the gross income was 89, managing cost was 1,848, income was – 1.759 thousand won per 10a. The professional farm management scale based on Baeksoooh's income of 20 million won is 43.4 a, it can produce 890 ㎏ with 1,176 hours per years, and the income is 9,522 thousand won Conclusion : Because the Baeksoooh being processed and circulated as health functional food have raised questions about their feasibility, Production and consumption declined sharply. but Consumption is expected to increase gradually and it is likely to grow, but prices are expected to fluctuate. Therefore, The bottom 20% farmers should benchmark the top 20% farms and cultivate the appropriate scale. and It is necessary to cultivate in consideration of supply and demand of manpower as well as proper size and cultivation.

Background : There are studies on the planting distance, sowing periods, and over wintering method of Saururus chinesis, but lesson the necessary soil moisture content for rhizome growth. This study examines the effects of soil moisture content on the growth of Saururus chinesis. Method and Results : The radicles of Saururus chinesis were harvested in the beginning of March and cut into three joints. The planting densities were determined as 40 ㎝ × 10 ㎝, 40 ㎝ × 20 ㎝ and 40 ㎝ × 30 ㎝, and the soil moisture content was adjusted through continuous flooding treatment, wetting (0 ~ -10 kPa), and field moisture capacity (-20 ~ -50 kPa). As a result of investigating the ground growth of Saururus chinesis, the growth through continuous flooding was best with the planting distance of 40 ㎝ × 20 ㎝ that yielded a plant height of 7.4 ㎝, stem diameter of 5.2 ㎜, and leaf number of 5.5. The growth through field capacity (-20 ~ -50 kPa) was poorest at the planting distance of 40 ㎝ ×10 ㎝. The transpiration rate, indicating the breathing of leaves, was highest at 1.4 s ㎝-1 through continuous flooding at 40 ㎝ × 30 ㎝, and decreased to 0.5 s ㎝-1 with the field capacity of (-20 ~ -50 kPa) 40 ㎝ × 20 ㎝. The investigation on the leaves showed that the leaf weight was heaviest at 23.1 g/plant through continuous flooding of 40 ㎝ × 30 ㎝ that also showed a wider leaf area and rich chlorophyll. At continuous flooding of 40 × 10 ㎝, the leaf weight was as light as 9.5 g/plant, showing no consistency among treatments. The investigation on the underground growth showed the best results through continuous flooding with a planting distance of 40 × 10 ㎝ where the root length was 50.7 ㎝, root diameter 6.7 ㎜, and fresh root weight of 45.3 g/plant, which decreased to 24.4 g/plant with field capacity (-20 ~ -50 kPa). The investigation on the polyphenol content as a functional component showed the richest content in the leaf of the plant at 752.5 ㎎/100g through continuous flooding, and lowest at 661.0 ㎎/100g with field capacity. With the field capacity (-20 ~ -50 kPa) it was the highest at 262.0 ㎎/100g. Conclusion : It was the most advantageous for mass Saururus chinensis radical production with continuous flooding treatment for soil moisture and a planting distance of 40 × 10 ㎝.

Background : Recently there has been an increasing demand for well-being and health food products. Foreign special and medicinal crops which were not cultivated in Korea before are widely introduced and cultivated in Korea. Therefore, in order to provide the basic information necessary for stable cultivation of the introduced crops, we conducted a survey on the actual condition of cultivation of farms and sought to suggest future work. Methods and Results : The survey was conducted in cooperation with the Rural Development Administration and local rural organizations in the year 2015 based on cultivation area, number of farms, and cultivation scale. In thes case of Lepdium meyenii and Asimina triloba, we surveyed the status of management technology by stage of cultivation through the field case study of farms. As a result, 14 crops were cultivated in 1,015 farms in 329.9 ha area including, Allium hookeri, Amaranthus blitum, Annona muricata, Asimina triloba, Chenopodium quinoa, Curcuma longa, Glycyrrhiza uralensis, Gynura procumbens, Lepdium meyenii, Moringa oleifera, Ocimum americanum, Psidium guajava, Silybum marianum, and Stachys japonica. The cultivation scale decreased in the order of C. longa, G. uralensis, A. hookeri, P. guajava, L. meyenii, M. oleifera, and A. triloba. Generally, L. meyenii seeds were sown generally in September and the roots were harvested from mid April to early May in the following year after wintering. A. triloba was cultivated using emerged seedlings or grafted seedlings. The emerged seedlings were more 5 years, and the grafted seedlings were more 4 years so that the fruit can be harvested. Conclusion : In order to stabilize the cultivation of special and medicinal crops introduced from foreign countries, it should be safe and economical in terms of cultivation environment based on domestic cultivation adaptability test, and the use of products and sales channels should be established first. Also, national support and countermeasures for benefit sharing under the Nagoya protocol are needed.

Background : Polygonatum is a perennial herbaceous crop that is further classified into P. falcatum A. Gray (wild vegetation of Jeju, Japan), P. sibiricum F. Delaroche (wild vegetation of Korea north, China, Russia, and Mongol), and P. stenophyllum MAx (wild vegetation of South of Danyang), with the herbal name of Rhizoma polygonati. Polygonatum is harvested after 5 - 6 years since planting, and the quality of the radicle is a major factor determining the quantity of harvest. This study presents the morphological characteristics to predict the later quantity of radicles when planting polygonatum, and develops the methods for the prediction. Methods and Results : This study investigated the ground-level growth and the quantity of radicles in underground in 5-years-old, 4-leaf, 5-leaf, and 6- or more leaved polygonatum planted in the Chungbuk Agricultural Research and Extension Services. According to the investigation on the ground-level growth by the number of leaves, the 5-leaved plant showed the best plant length and nodal leaf number; 171 ㎝ and 24/stock, respectively. On the other hand, the leaf number and leaf weight were as heavy as 85 leaves and 58.3 g/stock, respectively, in 6-leaved plants or plants with more leaves. The leaf area was as wide as 15.6 ㎠ with 5-leaved plant, and the chlorophyll was also high. The investigation on the underground growth showed the best results in 6-leaved plants or plants with more leaves: the root length was 23.8 ㎝, number of radicle node was 5.7, and root weight was 291 g. The quantity was highest at 2,148 ㎏/10 a with 6-leaved plants or plants with more leaves, and at the lowest at 907 ㎏/10 a in 4-leaved plants. The profit analysis showed a profit of 3,859,000 won/5 years in 6-leaved plants or plants with more leaves, which 86% higher than the 4-leaved plants. Conclusion : If plants with6-leaf or more leaves at the ground level are selected and used as radicles for new polygonatum packaging, the quantity of radicles has increased by 59% and the profit increased by 86%, compared to 4-leaved plants.

Background : This study was performed to investigate the morphological and growth characteristics and metabolomics approach for the diploid and tetraploid Polygonum multiflorum Thunb (PMT). Methods and Results : The present study was performed to investigate the effective induction method of tetraploid plants using colchicine treatment. To know the morphological and growth characteristics of PMT overground growing was investigated about the stem diameter, leaf length and width, a scape, inflorescence length, chlorophyll, seed length and seed width. Metabolite profiles from P. multiflorum were analyzed by an ultra performance liquid chromatography–quadrupole - time of flight (UPLC-Q-TOF) mass spectrometry (MS). The number of stomata and chlorophyll content was also higher in tetraploid. However, the physiological and morphological characteristics of the newly developed tetraploid showed noticeable results compared to the diploid plant. Also, the inherent characteristics of a newly acquired tetraploid also exhibited better results compared to diploid. Twenty one compounds including catechins from leaf and thirty compounds including stilbenes from roots were identified as major metabolites of PMT. The levels of most root metabolites except dethiobiotin, epigallocatechin gallate, procyanidin B1, epiafzelechin 3-O-gallate, and moupinamide from PMT were higher than those of diploid. The levels of 2,3-digalloylglucose, fallacinol, tricin, physcion-8-O-β-D-glucoside, torachrysone-8-O-β-D-glucopyranoside, questin, aloe-emodin 8-O-(6′-O-acetyl)-glucoside, polydatin, 2,5-dimethyl-7-hydroxychromone, 3,5,4'-trihydroxystilbene, aloe-emodin, myrciacitrin II and ω-hydroxyemodin from teraploid PMT were 342, 32, 31, 21, 11, 11, 9, 8, 6, 5, 4, and 2 times, respectively, higher. Conclusion : From above results, overground growing of tetraploid P. multiflorum is fairly better than that of native P. multiflorum.

Arctic sea ice as an indicator of climate change plays an important role in controlling global climate system. Thus, accurate observation and prediction of Sea Ice Concentration (SIC) is essential for understanding global climate change. In this study, we aim to improve the prediction accuracy of SIC by using machine learning and Regional Climate Model (RCM) data for a more robust method and a higher spatial resolution. Using the CORDEX RCM and NASA SIC data between January 1981 and December 2015, we developed three statistical models using Multiple Linear Regression (MLR), Support Vector Machine (SVM), and Deep Neural Network (DNN) which can deal with the non-linearity problem, respectively. The DNN model showed the best performance among the three models with the significant correlation between the predictive and observed SIC (r=0.811, p-value < 0.01)and the Root Mean Square Error (RMSE) of 0.258. With deeper considerations of the polar fronts and the characteristics of ocean current and tide, the DNN model can be applied for near future prediction of Arctic sea ice changes.

자외선 차단기능과 제균 기능을 갖는 합성 TiO2-복합체에 대해 압력의 영향을 체크하기 위해 고압실험을 시행하였다. 복합체 분말시료는 아나타제와 루틸 및 염화은으로 구성되어 있으며, 입자크 기는 34 nm 정도로 결정되었다. 아나타제와 루틸 모두 약 14~16 GPa 구간에서 ZrO2 (배델레이트)-형 태의 결정구조로 상변이하며, 본 실험의 최고압력인 22.7 GPa까지 상변이는 계속된다. 압력을 모두 제거하여 상압 상태가 되면, 루틸은 α-PbO2 구조로 상변이하며 아나타제는 고압의 ZrO2-결정구조가 유지되는 것으로 판단된다. 염화은의 회절피크는 낮은 압력에서 사라지는 것이 관찰되었다.

Background : 1-Deoxynojirimycin (DNJ) is a representative compound of the antidiabetic constituent in mulberry leaves (Morus alba L.). The hot water extracts of mulberry leaves were fermented with lactic acid bacteria in order to analysis the changes of the DNJ contents and α-glucosidase inhibition. Methods and Results : The mulberry leaves were extracted with hot water (121℃, 3 hr). The extracts were fermented with nine strains of lactic acid bacteria such as Lactobacillus acidophilus, in order to increase the contents of DNJ and α-glucosidase inhibition. DNJ contents in the fermented extracts were determinated by HPLC analysis. The α-glucosidase inhibition was mesured by comparing dose-inhibition curves of α-glucosidase and IC50 value. The DNJ contents after fermentation have increased in the almost fermented extracts. Especially, DNJ of the extracts fermented with L. acidophilus was increased from 8.38 ㎍ ㎖ -1 to 21.77 ㎍ ㎖-1. IC50 values of the α-glucosidase inhibition were shown to be decreased in the fermented extracts. The extracts fermented with L. casei KCTC 3109 was determined at 290.04 ㎍ ㎖-1, resulting it is lower about 140 ㎍ ㎖-1 than 429.76 ㎍ ㎖-1 of the control. Conclusion : From the above results, we may suggest that the lactic acid fermentation of mulberry leaves extracts can more enhance the hypoglycemic activities such as DNJ contents.

인회석 광물 군에 속하는 녹연석(Pb4.85(P1.02O4)3Cl1.04)에 대한 상온-고압 상태방정식 연구를 시 행하였다. 대칭형 다이아몬드 앤빌기기를 이용하여 33.4 GPa까지 압력을 증가시키면서 각분산 X-선 회절법과 방사광을 이용하여 회절 데이터를 검출하였으며, 시료에 가해준 압력은 루비 형광파의 파장 변화를 측정하여 결정하였다. 본 고압실험에서 시행한 압력의 범위 내에서 상변이는 관찰되지 않았으 며, 정압상태에서 체적탄성률(K0)은 K0’ = 13(2)일 때 80(7) GPa로 계산되었다. 본 연구에서 결정된 상온상태에서 녹연석의 체적탄성률 신뢰도를 정규화압력 및 정규화응력변형 분석을 하여 평가하였다.