• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.32-32
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• 2018

Flora investigations in Korea have been conducted by many researchers for diverse purposes. Accumulated flora investigation data has not been utilized efficiently because there is no accessible database for comparison. To overcome this shortcoming, we constructed web-based database of flora investigation, named as the Integrated Korean Flora Database (IKFD; http://www.floradb.net/intro.php). Until now, 284 flora references (263 papers, 14 reports and books, and 7 unpublished papers written in between 1962 and 2017) were digitalized into the database. From 134,711 records, 4,301 species belonging to 228 families and 1,079 genera were identified via mapping with two major Korean plant species lists. Polygon areas originated from references were used for distribution of plant species, identifying precise distribution area. It will be a better index to show plant ecological characteristics. Collected micro-climate data provided by Korea Meteorology Administration were also integrated in IFKD for understanding correlation between distribution of plants and micro-climate. Cold hardiness zone which has been utilized for classifying climate zones. 12 out of 26 zones identified based on micro-climate data in Korea were mapped with distribution of plants. More than half species were appeared in zone 6a, 6b, 7a, and 7b. Taken together with these results, IKFD will be a fundamental platform for understanding plants in Korea flora investigation as well as a new standard for classifying distribution of plants. Moreover, Biodiversity Observation Database (BODB; http://www.biodiversitydb.info/intro.php) which integrates plant distribution data was also integrated for further studies.

• Communications for Statistical Applications and Methods
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• 제10권1호
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• pp.211-224
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• 2003

Good's lambda test, a permutation test used to detect the changes of microorganism composition under two pathological conditions, has been quite popular for studying the micro-flora responsible for periodontal disease. A vast number of different micro-flora in the mouth renders the traditional chi-square test inapplicable. The main purpose of this paper is to evaluate the power of this test so that the sample size can be determined at the design stage. The robustness of this test and its comparison to two other intuitive tests are also presented. It is found that a permutation test based on likelihood ratio is more powerful than the lambda test in our simulated cases.

• Mycobiology
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• 제46권4호
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• pp.305-310
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• 2018

The genus Candelaria is characterized by a micro-foliose to micro-fruticose thallus and contains eight species, two of which were reported in South Korea. During the excursion of a Korean lichen flora investigation, some suspected Candelaria concolor specimens were collected, and their morphological, chemical, molecular phylogenetic, and geographic analyses were conducted. The samples eventually proved to be a new species, Candelaria asiatica, which can be recognized by a small, yellow lobate thallus with a pulverulent surface, and a fragile lobe margin with blastidia or phyllidia-like lobules.

• Environmental Analysis Health and Toxicology
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• 제1권1호
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• pp.71-76
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• 1986

The determination of fungal flora in some kinds of cereals have been carried out in other to obtain an appropriate information of the population of fungi and toxin productivity The results were summarized as follow; 1. The predominant genera were Aspergillus, Penicillium, Mucor, Rhizopus, Alternaria, Fusarium. 2. Six of Aspergillus flavus were aflatoxin-producing strains. 3. Sample barleys were found to contain the highest content of aflatoxin. 4. In electron microscopic studies of liver cells from mouse which had been injected with crude toxin, the liver cells showed the cytoplasmic change.

• Journal of Plant Biology
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• 제13권1호
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• pp.13-24
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• 1970

This investigation was one of the series of ecological studies on the plant communities of Quelpart Island which was held in 1969. It was aimed at studying the ground vegetation of Torreya nucifera and the soil properties of the ground in which it grows. Observaton of the flora in a place where wild growth of Crinum maritimum, soil properties and distribution of micro-organisms in a place where wild growth occurs, were also made. 1) A few kinds which have important values among the ground vegetation fo Torreya nucifera forest are Liniope graminifolia, Convallaria keiskei, Sasaquelpaertensis, Carex kingiana, Pteridium aquilinum, Pyrola japonica, Hedera tobleri, etc. 2) While the studies of 25 Quadrats were being held, 29 species in A plot, 30 species in B plot, and 26 species in C plot have been found. 3) The kind which has the highest important value among the species located in naked plot(outside of Torreya nucifera forest) is Zoysia japonica and 18 other kinds were found. 4) The soil fertility through all depths are found higher in the forest soil than in that of open places. 5) P2O5, K, and total exchangeable bases etc. have shown the difference of contents according to the depth and generally had lower value as much as it goes down. 6) The content of N was a lot higher than any other forest soil and P2O5, K and total exchangeable bases seemed to be a little lower. 7) The overall flora of Todo consists of 71 species (9 species of wood plant and 62 species of herbs) added 28 kinds of non-reported species. 8) Themineral contents are the highest at a place of wind growth of Crinum maritimum which has much organic matter. The subsoil of this place is more fertile than surface soil. 9) The soil of Todo which is sandy soil, consists of shellfish shell and quartz, and has low fertility and alkali. 10) In the total occurrences of micro-organisms, bacteria was the greatest in number followed by actinomycete and fungi, in that order. 11) A survey of the soil depth and the ecological distributional pattern of micro-organismsm revealed that the number of micro-organisms is the greatest on the surface, gradually decreasing in proportion to the depth. 12) It was found that a comparatively greater number of micro-organisms occurred when the soil showed an adequate increase in water content.

• 환경영향평가
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• 제21권3호
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• pp.431-443
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• 2012

Wind holes or air holes, from which cool air blows out during the summer, but mild air comes out during the winter, have provided the phytogeographically important refugia for cryophilous or cold-loving boreal flora during the Holocene period. At present, wind holes are serving as a faraway disjunctive habitat for Pleistocene relict glacial floristic elements, and present an invaluable information to reconstruct the natural history. Present work aims to collate the nationwide distribution and relevant DB on the potential wind holes of Korea based upon media and literature sources, along with geographical informations, such as place name, topographic map, environmental geographical information, flora, monitoring data of Korea National Arboretum, and field survey data. Geographical information on sixty nine wind hole sites have compiled and analyzed on the basis of flora and presence of fossilized periglacial landforms, such as talus, block field, and block stream, and sixteen sites have thereafter carefully selected and scrutinized through field surveys. To maintain a sustainability of wind hole ecosystem, including their original landform, micro-meteorological phenomena and plant community therein as a refugia or habitat for relict plant species of Pleistocene glacial period, appropriate restrictions and preservation measures are required.

• 한국토양비료학회지
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• 제18권2호
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• pp.221-226
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• 1985

밭토양(土壤)에서 살충제(殺蟲劑) Hexachlorocyclohexane(HCH) 및 살균제(殺菌劑) Tetrachloroisophthalonitrile(TPN)의 연용(連用)이 토양세균(土壤細菌) flora의 구성(構成)을 어떻게 변화(變化)시키는가를 검토(檢討)하기 위하여 HCH 및 TPN을 년(年)1회(回) 2년간(年間) 연용(連用)한 각실험구(各實驗區) 그리고 대조구(對照區)로서 농약(農藥) 무처리구(無處理區)로부터 단리(單離)한 세균세포(細菌細胞)의 현미경적(顯微鏡的) 관찰(觀察)과 생리적(生理的) 시험(試驗)을 하였다. 그리고 이 형태적(形態的) 및 생리적(生理的) 결과(結果)에 기초(基礎)한 Cowan & Steel의 제(弟)1차(次) 감별기준(鑑別基準)에 따라 이들 단리균주(單離菌株)를 Grouping하여 다음과 같은 결과(結果)를 얻었다. 1. 희석평판법(稀釋平板法)에 의한 알부민 한천배지상(寒天培地上)에 형성(形成)된 micro-colony를 육즙한천배지(肉汁寒天培地)에 이식배양(移植培養)하여 순수분리(純粹分離)하는 과정(過程)에서 많은 세균(細菌)이 사멸(死滅)하였는데 대조구(對照區)에서 30%, HCH구(區)에서 44%, TPN구(區)에서 51%의 사멸률(死滅率)을 각각 보였다. 이는 이들 농약(農藥)의 연용(連用)에 의하여 사멸(死滅)하기 쉬운 즉(卽) 영양요구성(營養要求性)이 복잡(複雜)한 세균군(細菌群)이 토양(土壤)중에 집적(集績)되었음을 시사(示唆)한다. 2. 전단리균주(全單離菌株)에 대한 그람음성세균(陰性細菌)은 대조구(對照區)에서 37%, HCH구(區)에서 37%, TPN구(區)에서 75%를 각각 나타내어 TPN은 그람음성세균군(陰性細菌群)을 토양(土壤)중에 우점(優占)시켰다. 3. 각실험구(各實驗區)로부터 단리(單離)된 균주(菌株)에 대한 현미경적(顯微鏡的) 관찰(觀察)과 생리적(生理的) 시험결과(試驗結果)로부터 HCH와 TPN은 서로 다른 pattern으로 토양세균(土壤細菌) flora의 구성(構成)을 변화(變化)시켰다. 4. 전단리균주(全單離菌株)에 대한 포자형성세균(胞子形成細菌)은 대조구(對照區)에서 77%, HCH구(區)에서 40%, TPN구(區)에서 0%를 각각 나타내어 농약처리구(農藥處理區)에서 포여형성세균군(胞予形成細菌群)이 저하(低下)되었고, 특(特)히 TPN구(區)에서는 포자형성균(胞子形成菌)이 전(全)혀 분리(分離)되지 않았다. 5. HCH 혹은 TPN의 살포(撒布)에 의하여 Group I(Bacillus)에 유별(類別)되는 포자형성세균군(胞子形成細菌群)이 감소(減少)된 반면(反面)에 그람음성(陰性)의 포자비형성세균군(胞子非形成細菌群)이 증가(增加)되어, HCH 및 TPN은 토양세균(土壤細菌) flora의 구성(構成)을 현저(顯著)하게 변화(變化)시켰다.

• Journal of Microbiology and Biotechnology
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• 제17권8호
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• pp.1227-1235
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• 2007

Lactic acid bacteria (LAB) provide several potential health and nutritional benefits, including improving the nutritional value of food, controlling serum cholesterol levels, and controlling some types of cancer. Numerous in vitro, in vivo, human, and epidemiological studies have provided evidence of the chemopreventive effects of LAB on colon, bladder, liver, breast, and gastric cancers. These effects act via diverse mechanisms, including alteration of the gastrointestinal micro flora, enhancement of the host's immune response, and antioxidative and antiproliferative activities. This review discusses the recent progresses on the chemopreventive effects of LAB on specific cancer types and the underlying molecular mechanisms.

• 대한치과의사협회지
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• 제21권7호통권170호
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• pp.573-577
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• 1983

The antimicrobial action of various dental cements evaluated against common micro-organisms most frequenty found within the components of the normal bacterial flora of oral cavity. They include Streptococcus mutans (2 strains), Lactobacillus acidophilus, Actinomyces viscosus, and Streptococcus sanguis. The test was done by the use of brain heart infusion (BHI) agar plates. A standard mix of each cement was made and placed on the plates which were seeded with a standard culture of microorganisms. After incubation, the halo of bacterial growth inhibition around the cement was identified and its size was measured. Some of the cements tested had obvious antibacterial effect. The cements listed in decreasing order of effectiveness are 1) zinc phosphate and oxyphosphate, 2) silicate, 3) zinc oxide-eugenol, 4) calcium hydroxide, and 5) carboxylate.

• 한국균학회지
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• 제47권4호
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• pp.281-289
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• 2019

Since 2013, more than 100 Entoloma (Entolomataceae, Agaricales) collections have been made during field investigations of mushroom flora in Korea. Among these collections, three Entoloma species were identified as new records from Korea. Morphological examinations were made based on the macro- and micro-morphological features of the isolates collected during field visits. To ensure the identity of the isolates at the species level, DNA sequences from four gene regions (rpb2, ITS, 28S, and mtSSU) were compared. To the best of our knowledge, these are the first records of E. aprile, E. chytrophilum, and E. hirtipes in Korea. Comprehensive descriptions, photographs, and phylogenetic examinations are presented here.