• 한국버섯학회지
• /
• 제20권4호
• /
• pp.208-217
• /
• 2022

내장산국립공원 내 자생하는 버섯류를 2021년 5월부터 9월까지 5개월 동안 조사하였다. 이 기간 동안 총 4문, 9강, 25목, 72과 171속 381분류군의 버섯류가 확인되었고 기후변화지표종은 3분류군이 관찰되었다. 주름버섯목이 24과, 62속, 170분류군으로 가장 많이 발견되었다. 그 중 무당버섯속이 30분류군으로 가장 많았고 그 다음으로 광대버섯속이 27분류군이 관찰되었다. 조사한 12 지점 중, F5 지역에서 서로 다른 버섯이 56분류군 발견되어 가장 종이 다양한 것으로 조사되었다. 특히, 외근균에 속하는 무당버섯속과 젖버섯속이 많이 발견되었다. 이 지역은 경사가 완만할 뿐 아니라 조릿대 발생이 적어 버섯류가 자생하기에 적합한 환경이 조성된 것으로 판단된다. 실제로 경사가 가파르고 조릿대가 많이 발견된 다른 조사 지점인 F6, F8 그리고 F10에서는 19분류군만 관찰되었다. 그 외에 DNA 염기서열 분석을 통해 확인한 결과 표본 NJ21064는 Chlorophyllum hortense로 국내 미기록종으로 동정되었다.

• Molecules and Cells
• /
• 제27권5호
• /
• pp.515-523
• /
• 2009

To infer the monophyletic origin and phylogenetic relationships of the order Desmoscolecida, a unique and puzzling group of mainly free-living marine nematodes, we newly determined nearly complete 18S rDNA sequences for six marine desmoscolecid nematodes belonging to four genera (Desmoscolex, Greeffiella, Tricoma and Paratricoma). Based on the present data and those of 72 nematode species previously reported, the first molecular phylogenetic analysis focusing on Desmoscolecida was done by using neighbor joining (NJ), maximum parsimony (MP), maximum likelihood (ML) and Bayesian inference (BI) methods. All four resultant trees consistently and strongly supported that the family Desmoscolecidae forms a monophyletic group with very high node confidence values. The monophyletic clade of desmocolecid nematodes was placed as a sister group of the clade including some members of Monhysterida and Araeolaimida, Cyartonema elegans (Cyartonematidae) and Terschellingia Iongicaudata (Linhomoeidae) in all the analyses. However, the present phylogenetic trees do not show any direct attraction between the families Desmoscolecidae and Cyartonematidae. Within the monophyletic clade of the family Desmoscolecidae in all of the present phylogenetic trees, there were consistently observed two distinct subgroups which correspond to the subfamilies Desmoscolecinae [Greeffiella sp. + Desmoscolex sp.] and Tricominae [Paratricoma sp. + Tricoma sp].

• 한국도서관정보학회지
• /
• 제39권3호
• /
• pp.479-500
• /
• 2008

이 연구는 "하서전집"의 인용문헌 분석을 통해 김인후의 독서관을 고찰하였다. 그 결과 최소한 123종의 책을 독서했으며, "사서삼경", "사기", "한서", "장자", "고문진보", "초사", "문선"을 가장 많이 인용하였다. 김인후는 16세기 선비들이 보여주는 공통적인 독서범주를 뛰어넘은 다양한 독서, 시대상에 구애받지 않은 자유로운 독서를 했음을 알 수 있다. 그의 독서관은 성리학의 경서를 중요시 여겼으며 또한 다양한 독서를 통하여 실생활에 유익한 지식을 얻음과 동시에 방대한 저술의 바탕을 마련하였다.

• Animal cells and systems
• /
• 제14권1호
• /
• pp.45-51
• /
• 2010

Genetic variation was surveyed at the mitochondrial control region (766bp) to test for the presence of genetic stock structure in the small yellow croaker, Larimichthys polyactis from the Yellow and East China Seas. Individuals of the small yellow croaker could not be distinguished on the basis of its location, as demonstrated using the neighbor-joining (NJ) method, unweighted pair-group method, arithmetic average (UPGMA) and the minimum spanning network (MSN). Analysis of molecular variance revealed no significant differences among collections of the small yellow croaker taken from the four locations (two locations each in Korea and China). Neutrality tests and a mismatch distribution analysis indicated that this species has recently expanded. Our findings suggest either that the small yellow croaker has a high migration capability that enables it to overcome the effects of genetic drift, or that this species expanded relatively recently and has not yet had sufficient time to differentiate.

• Journal of Ecology and Environment
• /
• 제38권4호
• /
• pp.647-654
• /
• 2015

A prostrate species of Codium (Bryopsidales, Chlorophyta) was collected from Daejin on the eastern coast of Korea. This alga is morphologically characterized by a prostrate, adherent or pulvinate, dark green thallus that is tightly attached to substratum. The utricles are strongly grouped and cylindrical to slightly clavate. Their apex is rounded to capitated, and it frequently has an alveolate ornament. Hair scars are found in the upper portion of the utricle. The gametangia grow on a short pedicel in the upper part of the utricle. In the phylogenetic tree based on molecular data, this alga is placed in the same clade as C. mozambiquense in UPGMA analysis, and nests in a sister clade of C. lucasii subsp. capense and C. mozambiquense in ML and NJ analyses. However, the genetic distance between the sequences of the Korean alga and the two species is 1.3-1.9%, while that between the Korean alga and C. lucasii from Japan is 1.1% within intraspecific range. The divergence value between the Korean alga and C. lucasii from the type locality (Australia) is 2.7% considered to be interspecific range. As based on this genetic divergence value, the Korean alga together with Japanese C. lucasii can be separated from genuine C. lucasii from the type locality. However, the Korean alga is identified as C. lucasii until those entities are morphologically characterized in species level. This is the first record of C. lucasii in Korea

• 한국음향학회지
• /
• 제18권7호
• /
• pp.80-84
• /
• 1999

본 논문에서는, 협대역 음성신호의 정보로부터 광대역 음성신호를 예측하는 분할모델 분석알고리즘을 제안한다. 분할모델 분석알고리즘에서는 10차 LPC모델을 5개의 종속적으로 연결된 2차 모델로 분리하였다. 복잡성을 감소한 2차계수모델의 이용은 모델 파라미터와 LPC모델의 모든 극점사이의 복잡한 비선형 관계를 단순화시킨다. 모델 파라미터와 동일한 아날로그 극점사이의 관계를 본 논문에서 증명하였고, 각각의 2차 계수의 모델에 적용하였다. 그로 인해 광대역 음성신호는 단순한 샘플링 변경에 의해서 얻어졌다.

• The Korean Journal of Pain
• /
• 제28권2호
• /
• pp.75-87
• /
• 2015

Background: Lumbar discogenic pain without pain mediated by a disc herniation, facet joints, or the sacroiliac joints, is common and often results in chronic, persistent pain and disability. After conservative treatment failure, injection therapy, such as an epidural injection, is frequently the next step considered in managing discogenic pain. The objective of this systematic review is to determine the efficacy of lumbar epidural injections in managing discogenic pain without radiculopathy, and compare this approach to lumbar fusion or disc arthroplasty surgery. Methods: A systematic review of randomized trials published from 1966 through October 2014 of all types of epidural injections and lumbar fusion or disc arthroplasty in managing lumbar discogenic pain was performed with methodological quality assessment and grading of evidence. The level of evidence was based on the grading of evidence criteria which, was conducted using 5 levels of evidence ranging from levels I to V. Results: Based on a qualitative assessment of the evidence for both approaches, there is Level II evidence for epidural injections, either caudal or lumbar interlaminar. Conclusions: The available evidence suggests fluoroscopically directed epidural injections provide long-term improvement in back and lower extremity pain for patients with lumbar discogenic pain. There is also limited evidence showing the potential effectiveness of surgical interventions compared to nonsurgical treatments.

• Mycobiology
• /
• 제48권1호
• /
• pp.58-69
• /
• 2020

Meghalaya, (in India), in the region of the mega-biodiversity hotspots, is home to a plethora of wild mushrooms. The present study concerns the exploration of the order Agaricales, which includes rare gilled mushrooms considered endangered under IUCN A4c criteria, due to the declining habitat. Electron microscopy of the gill sections revealed an abundance of clamp connections, hyphal cell walls, cystidia, and basidia. This rare species which belongs to the family Cyphellaceae, exhibits morphological and molecular differences from the Cyphella spp. Phylogenetic analysis revealed that it formed a clade under the genus Campanophyllum of the order Agaricales, confirmed by both Neighbor Joining (NJ) and Bayesian phylogenetic analysis. Being nutritionally potent along with its efficient antioxidant value, the fungal extract shows significant rise of two-fold in the antimicrobial activity along with the commercial antibiotics. The compound, Phenol, 2, 4-bis (1, 1-Dimethylethyl) (2, 4-DTBP) showed in ample range in the fungal extract along with aliphatic hydrocarbons, terpene, alcohol and volatile organic compounds on further characterization in GCMS. The present study indicates the endangered Campanophyllum proboscideum could be a rich source of natural antioxidants and an effective pharmaceutical agent.

• 전기학회논문지
• /
• 제64권2호
• /
• pp.247-253
• /
• 2015

Dielectric breakdown accidents have been mainly occurred in the vicinity of service entrance section in underground power transmission systems. One cause among them is due to the excessive component value of sheath located around service entrance of cable. In this paper, as one of the alternative to prevent these accidents, the change of cross bond grounding system and the location change of IJ(Insulation Joint) are suggested. Also, to evaluate effectiveness of this changing system, circulating current and induced voltage of sheath were analyzed in steady and transient state. By comparison of the analytical results for the several possible changing systems, a grounding system and location of IJ which has the smallest sheath component values is proposed. In this paper, analysis to evaluate the proposed system is carried out by EMTP/ATPDraw. It can be used as a valuable operational material to prevent accident of the service entrance section in underground power transmission system.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 1999년도 제17회 학술발표회 논문개요집
• /
• pp.73-73
• /
• 1999

A large area negative metal ion beam source is developed. Kinetic ion beam of the incident metal ions yields a whole nucleation and growth phenomena compared to the conventional thin film deposition processes. At the initial deposition step one can engineer the surface and interface by tuning the energy of the incident metal ion beams. Smoothness and shallow implantation can be tailored according to the desired application process. Surface chemistry and nucleation process is also controlled by the energy of the direct metal ion beams. Each individual metal ion beams with specific energy undergoes super-thermodynamic reactions and nucleation. degree of formation of tetrahedral Sp3 carbon films and beta-carbon nitride directly depends on the energy of the ion beams. Grain size and formation of polycrystalline Si, at temperatures lower than 500deg. C is obtained and controlled by the energy of the incident Si-ion beams. The large area metal ion source combines the advantages of those magnetron sputter and SKIONs prior cesium activated metal ion source. The ion beam source produces uniform amorphous diamond films over 6 diameter. The films are now investigated for applications such as field emission display emitter materials, protective coatings for computer hard disk and head, and other protective optical coatings. The performance of the ion beam source and recent applications will be presented.