• Title/Summary/Keyword: 전남대

Search Result 356, Processing Time 0.033 seconds

Outbreak of Rice Panicle Blast in Southern Provinces of Korea in 2014 (우리나라 남부지방에서의 2014년 벼 이삭도열병 대발생)

  • Kang, Wee Soo;Seo, Myung-Chul;Hong, Seong Jun;Lee, Kyong Jae;Lee, Yong Hwan
    • Research in Plant Disease
    • /
    • v.25 no.4
    • /
    • pp.196-204
    • /
    • 2019
  • Rice panicle blast occurred severely in southern provinces of Korea in 2014. The proportion of panicle blast incidence area to cultivated area of rice were 11.0% and 14.6% in Jeollanam-do and Gyeongsangnam-do, respectively. To identify the causal factors of the outbreak, we investigated weather conditions in August, amount of cultivated area of mainly grown cultivars, and nitrogen contents in plants with different disease incidences in 2014. 'Saenuri,' 'Ilmibyeo,' 'Unkwang,' 'Dongjin 1 ho,' 'Nampyeongbyeo,' and 'Hwangkeumnuri' were mainly grown cultivars. Monthly average of daily air temperature in August 2014 was 3.2℃ and 3.1℃ less than 2018 in Haenam and Miryang, respectively. Rainfall in August 2014 was 70.0% and 42.0% greater than 2018 in Haenam and Miryang, respectively. The numbers of blast warning days in August calculated nationwide using a forecast model for blast infection were higher in 2014 than in 2018, and they were in high level throughout the country in 2014. Nitrogen contents in plant samples from high-incidence plots were significantly higher than those from low-incidence plots. Consequently, excessive use of nitrogen fertilizers was the main factor for the disease outbreak at the level of specific farms, in addition to the collective cultivation of susceptible cultivar, low temperatures and frequent rainfalls in August.

A CLINICAL STUDY ON ORAL & MAXILLOFACIAL PATIENTS VISITING CHONNAM UNIV-HOSPITAL EMERGENCY ROOM (전남대학교병원 응급실에 내원한 구강악안면외과 환자에 대한 임상적 연구)

  • Cho, Kyu-Seung;Kim, Ki-Yung;Lee, Sung-Hun;Park, Hong-Ju;So, Kwang-Sub;Cho, Yong-Ki;Oh, Hee-Kyun;Ryu, Sun-Youl
    • Maxillofacial Plastic and Reconstructive Surgery
    • /
    • v.19 no.4
    • /
    • pp.435-446
    • /
    • 1997
  • Overall study was carried out for the patients visiting Department of Oral & Maxillofacial Surgery through Emergency Room in Chonnam University Hospital, from Jan. 1, 1992 to Dec. 31, 1996. Result obtained were as follows ; Male predilection was shown, the male to female ratio being 2.5 to 1. The frequently developing age group were the first 3rd and 4th decade and under the age of 9 was followed. The number of patients for emergency was peak in September and October to 11%. About the causes for emergency, traffic accident was the most, and fall down injury and assault were followed. About the injury lists, facial laceration was preceded and the next facial bone fracture and the tooth injury followed. In the facial bone fracture, fracture in the mandible only was the most, and zygomaticomaxillary complex fracture, and mandible-maxilla complex fracture were followed. when the case of the mandible fracture, symphysis, condyle, angle were marked in succession. 57% was predomunatly ranged in the timea of 18 : 00 to 03 : 00 for the emergency. From injury onset to visiting emergency room, the range of 8 hours to 12 hours was predominant. Above results suggest that urgent patients of oral and maxillofacial area were relatively so high that division of oral and maxillofacial surgery should be established immediately.

  • PDF

Ore Minerals and Genetic Environments of Quartz Veins from the Hwawon Area, Haenam, Korea (전남 화원일대의 석영맥에서 산출되는 광석광물과 이의 생성환경)

  • Yoo, Bong-Chul;Oh, Jin-Yong;Kang, Heung-Suk;Lee, Hyun-Koo
    • Economic and Environmental Geology
    • /
    • v.39 no.5 s.180
    • /
    • pp.583-595
    • /
    • 2006
  • Quartz veins from the Hwawon area are an epithermal quartz vein that is filling the fault zone within Precambrian metasedimentary rocks and Jurassic granite. Mineralization can be divided into hypogene and supergene stages. Hypogene stage is associated with hydrothermal alteration minerals(propylitic and argillic zones) such as epidote, chlorite, illite, sericite and sulfides such as pyrite, sphalerite, chalcopyrite, galena, bornite, cubanite, argentian tetrahedrite, Pb-Ag-S system and Pb-Te-S system. Supergene stage is composed of Fe-Mn oxide, Zn-Fe oxide and Pb oxide. Fluid inclusion data indicate that homogenization temperatures and salinity of hypogene stage range from $291.2^{\circ}C$ to $397.3^{\circ}C$ and from 0.0 to 9.3 wt.% eq. NaCl, respectively. It suggests that ore forming fluids were cooled and diluted with the mixing of meteoric water. Oxygen($-0.7{\sim}3.5%_{\circ}$(white quartz: $-0.7{\sim}3.5%_{\circ}$, transparent quartz: $2.4%_{\circ}$)) and hydrogen($-70{\sim}55%_{\circ}$(white quartz: $-70{\sim}55%_{\circ}$, transparent quartz: $-62%_{\circ}$)) isotopic composition indicates that hydrothermal fluids were derived from magmatic and evolved by mixing with meteoric water during mineralization.

On flowering and maturing times of fruits and weight of seed by varieties of chestnuts in southern Korea (전남광양지구(全南光陽地區)의 밤나무 품종별(品種別) 개화기(開花期) 및 과실(果實)의 숙기(熟期)와 중량조사(重量調査))

  • Kim, T.W.
    • Journal of Korean Society of Forest Science
    • /
    • v.3 no.1
    • /
    • pp.36-42
    • /
    • 1963
  • The results obtained are summarized as follows: 1. In both years of 1960 and 1961, the flowering times, fading times of flowers, mature times of fruits of 63 chestnut varieties grown at Choosan area, Chon Nam, have been investigated. Almost the ages of trees were 26-year-old and they are growing on the brown forest soil well drained with relatively thick surface soil. 2. Non-significant difference in flowering time by the varieties has been found between the years. The carliests in floweing time are Toyotama-wase, The isho-wase, Asami-wase, Umehira-wase, i.e., bloomed on May, 22, or a little later. 3. The fading dates of flowers of each varieties almost linearly correlated to the flowering date. The blooming period of each varieties was about 10 to 12 days. 4. Linear correlation between mature time and blooming time are observed, i.e., the earlier the blooming time comes, the earlier is the mature time of chestnut fruit. 5. The varieties having the smallest sized seed, are Otomune and Boji-kuri, however, those having the large one, are Ho-gin, Katayama, Ohara-wase.

  • PDF

A Study on the Current Conditions of Local Independent Bookstores and Methods to Vitalize the Bookstores : Focused on Local Independent Bookstores in Gwangju (지역 독립서점 현황 및 활성화 방안 : 광주지역을 중심으로)

  • Noh, Miryeong;Jeong, Kyungwoon
    • 지역과문화
    • /
    • v.7 no.2
    • /
    • pp.85-111
    • /
    • 2020
  • In Korea, the independent publication market has grown since it came into existence in the 1990s. In 2008, the country's first independent bookstores selling independent publications opened. As of late 2019, there were a total of 466 independent bookstores in Korea and the number of independent bookstores rapidly increased for the last decade. However, the closing rate of independent bookstores is rapidly increasing. This trend is also shown in independent bookstores in Gwangju. Recently, the closing rate of independent bookstores in Gwangju is more than twice as high as the national average. Against this backdrop, this study intended to identify the current conditions of independent bookstores in the city, analyze the problems facing them, and find solutions. Independent bookstores in Gwangju currently make various efforts such as book curation, management of various supplementary programs, and book markets. However, the bookstores have problems including the curation and programs focused on specific areas, focus on limited generations, dependence on publications from the Seoul metropolitan area. To address these problems, this study proposed solutions such as diversifying publications through planning and developing of local contents, strengthening the taste-based salon nature, organizing networks of independent bookstores, and systematically incubating independent bookstores. At the system level, this study also suggested a need for local bookstore certification system, a complete execution of a fixed book price system, and a fair provision rate.

The Effect of the Perception of the Value of 'Reading Aloud' on the Reading Attitude of Listeners: Focusing on the Reading Activities of the Korean Children's Book Association (책 읽어주기 가치 인식이 독서태도에 미치는 영향 - 어린이도서연구회 책 읽어주기 활동을 중심으로 -)

  • Park, Kyung-Heui;Lee, Myounggyu
    • Journal of Korean Library and Information Science Society
    • /
    • v.53 no.1
    • /
    • pp.1-29
    • /
    • 2022
  • The purpose of this study is to understand the effect of people who have heard of 'reading aloud' on the formation of reading satisfaction and reading attitude, and to obtain implications for the library book reading service. To this end, a survey was conducted on 439 people of various age groups. The results are as follows. First, there was a difference in value perception and satisfaction with reading books by age group, and there was no difference in reading attitude. Second, the satisfaction of the respondents who answered that the value of reading books was efficacy and feeling loved was positive, and the satisfaction of the respondents who answered that they were comfortable was lower than this. Third, the more positive the satisfaction level was, the more positive the reading attitude was. Fourth, respondents who participate in reading groups for children were found to have a high value perception of trust relationships and more experience in reading books, and the more experience they have in reading, the more they are affected by the behavioral aspect of reading attitude. Therefore, librarians (teachers) need to support the improvement of reading attitudes by actively operating reading groups for parents while planning programs that take into account value recognition types and satisfaction by age group.

Genesis and Classification of the Red-Yellow Podzolic soils derived from Residuum on Acidic and Intermediate Rocks -Vol. 1 (Jeonnam series) (산성암(酸性岩) 및 중성암(中性岩)의 잔적층에 발달(發達)된 적황색토(赤黃色土)의 생성(生成) 및 분류(分類) -제(第) 1 보(報) (전남통(全南統)에 관(關)하여))

  • Um, Ki Tae
    • Korean Journal of Soil Science and Fertilizer
    • /
    • v.4 no.2
    • /
    • pp.187-192
    • /
    • 1971
  • This paper deals mainly with the genesis and classification of the Jeonnam series. These soils have brown to dark brown silt loam and silty clay loam A horizon(strong brown or reddish brown where eroded). Argillic B horizons are dominantly red or yellowish red silty clay loam to silty clay with moderately developed subangular blocky structure and with thin clay cutans on the ped faces. The C horizons are strongly and very deeply weathered strong brown, yellowish brown, pale brown and reddish yellow silty clay loam and sandy loam granitic saprolite. Content of clay increases with depth to a maximum between 100cm. Percolating water seems to be responsible for transportation and oriented deposition of clay. Chemically, soil reaction is strongly acid to medium acid throughout the profile. The content of organic matter is 1 to 2 percent, and decreases regularly with depth. Base saturation is low, based on amount of extractable cations. Characterisltically the Jeonnam series are similar to Red-Yellow Podzolic soils of the United States and are similar to Red-Yellow soils of the Japan. In the writer's opinion the Jeonnam soils are classified as Red Yellow soils. According to USDA 7th approximation, this soil can be classified as Typic Hapludults and in the FAO/UNESCO World Soil Map as Helvic Acrisols.

  • PDF

Salinity and Heavy Metal Contents of Solar Salts Produced in Jeollanamdo Province of Korea (전라남도 지역에서 생산된 천일염의 염도 및 중금속 함량)

  • Lee, Kang-Deok;Park, Jeong-Wook;Choi, Cha-Ran;Song, Hyun-Woo;Yun, Su-Kyoung;Yang, Ho-Chul;Ham, Kyung-Sik
    • Journal of the Korean Society of Food Science and Nutrition
    • /
    • v.36 no.6
    • /
    • pp.753-758
    • /
    • 2007
  • To assess the safety of solar salts of Jeollanamdo province where most of Korean solar salts are produced, 433 samples of solar salts in total were collected and analyzed for their contents of sodium chloride and heavy metals (lead, cadmium, arsenic and mercury). Sodium chloride contents ranged from 80 to 85% in 63% of solar salts analyzed. Lead was not detected in 77% of solar salt samples and showed a value of below the maximum permissible limit (2 ppm) in other samples. Cadmium was not detected in most samples (78%), and the other samples where cadmium was detected showed a value far below the maximum permissible limit (0.5 ppm) except for three ones. Arsenic was detected in only four samples, but their concentrations were far below the permissible limit (0.1 ppm). Mercury was not detected in all samples. There were some differences between producing areas in the levels of sodium chloride and lead of solar salts, but the contents of cadmium, arsenic and mercury did not show significant regional differences. These results clearly indicate that solar salts produced from Jeollanamdo province are safe in the aspects of lead, cadmium, arsenic and mercury contents.

A Study on the Improvement for Port Placement of Response Vessel (방제선 배치 항만의 개선 방안)

  • Jang, Duck-Jong;Kim, Dae-Jin;Kim, Woo-Young
    • Journal of the Korean Society of Marine Environment & Safety
    • /
    • v.23 no.7
    • /
    • pp.810-819
    • /
    • 2017
  • The purpose of this study is to evaluate port use and the distribution of risk factors in 15 major ports in Korea, delineating the risk of each port after classifying the ports into four risk groups based on estimated risks. The placement of response vessels is then analyzed accordingly. Based on the results, danger was estimated to be especially high in ports where large-scale petrochemical facilities are located, such as Yeosu Gwangyang ports (1.85), Ulsan port (1.33) and Daesan port (1.25). The ports showing the next highest degree of danger were Pusan (0.95) and Incheon (0.83), which have significant vessel traffic, followed by Mokpo (0.71) and Jeju (0.49), which expanded their port facilities recently and saw an increase in large vessel traffic. Next is Masan (0.44), for which many fishing permits in the vicinity. When the relative ratios of each port were graded based on the Yeosu Gwangyang Ports, which showed the highest risk values, and risk groups were classified into four levels, the highest risk groups were Yeosu Gwangyang, Ulsan, Daesan and Pusan, with Incheon, Mokpo, Jeju, and Masan following. Pyeongtaek Dangjin, Pohang, Gunsan, and Donghae Mukho were in the mid-range danger group, and the low risk groups were Samcheonpo, Okgye, and Changsungpo. Among these, all response vessel placement ports specified by current law were above the mid-range risk groups. However, we can see that ports newly included in mid-range risk group, such as Mokpo, Jeju, and Donghae Mukho, were excluded from the pollution response vessel placement system. Therefore, to prepare for marine pollution accidents these three ports should be designated as additional response vessel placement ports.

A review on Separation Technologies for Lithium Recovery from Waste Solutions in Recycling Process of Waste Battery (폐배터리 재활용 공정 폐액 중 리튬 회수를 위한 분리 기술 고찰)

  • Song, Daesung;Kim, Eunkyu;Vu, Thang-Toan
    • Korean Chemical Engineering Research
    • /
    • v.60 no.4
    • /
    • pp.473-477
    • /
    • 2022
  • In this study, candidate technologies for lithium recovery from the process waste liquid generated in the waste battery recycling process were reviewed, and technologies applicable to the process from the commercialization point of view were reviewed from a qualitative point of view. The evaporation method is difficult to apply because it requires a large-scale land and shows a low recovery rate due to the loss of Li during the concentration process. In the case of precipitation, a commercially available technology shows a high recovery rate due to the high Li/Na selectivity of phosphoric acid, but there are disadvantages in that the process is complicated due to the use of expensive phosphoric acid, requiring a recovery step, and continuous operation is impossible because solids are handled in the Li concentration process. In the case of solvent extraction, if we find an inexpensive extractant with high Li/Na selectivity, continuous operation is possible with the method used in extraction of other metals in the previous step, and when Li is concentrated, continuous operation is possible because it is in a liquid state. If it shows a similar recovery rate compared to precipitation technology, commercialization will be the most likely.