• Title/Summary/Keyword: Evolution of Life

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First Recorded Family Synopiidae (Crustacea: Amphipoda) from the Korean Waters

  • Kim, Young-Hyo;Heo, Jun-Haeng
    • Animal Systematics, Evolution and Diversity
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    • v.33 no.3
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    • pp.162-168
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    • 2017
  • A newly recorded species of gammaridean amphipod, Synopia (Telsosynopia) trifidilla Hughes and Lowry, 2006 belonging to the family Synopiidae Dana, 1853 was collected from the southern Korean coasts. Synopia (Telsosynopia) trifidilla Hughes and Lowry is characterized by the entire telson with a trifid apical margin. The species is described and fully illustrated in the present study. This is the first record of the family Synopiidae from Korea.

First Record of One Sessile Ctenophora, Lyrocteis imperatoris, and Its Embryos from Korea

  • Song, Jun-Im;Hwang, Sung-Jin
    • Animal Systematics, Evolution and Diversity
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    • v.25 no.3
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    • pp.255-259
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    • 2009
  • The sessile ctenophores, Lyrocteis imperatoris Komai, 1941 were collected for the first time from Garinyeo, offshore Seogwipo of Jejudo Island by SCUBA diving on June 18, 2009. This species distributed in West North Pacific was newly recorded in Korean waters. Its embryos in various developmental stages were observed in the internal brood chamber.

A Taxonomic Study on Marine Sponges from Chujado Islands, Korea

  • Sim, Chung-Ja;Shim, Eun-Jeong
    • Animal Systematics, Evolution and Diversity
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    • v.22 no.2
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    • pp.153-168
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    • 2006
  • A taxonomic study on the marine sponges was conducted with the materials collected from Chujado Island, Korea during the period June 2001 to May 2005 by SCUBA and hands. They were classified into 63 species, 31 genera, 25 families, seven orders in a class. Among them, Antho (Arcania) manarensis Carter, 1880 and Eurypon lendenfeldi Hentschel, 1912 were newly added to Korean Fauna. Two species, Biemna chujaensis and B. jeolmyongensis, were new to science.

Perceptual Change of Undergraduate Students Majored in Theology about the Origins of Universe and Life (우주와 생명의 기원에 대한 신학 전공 대학생의 관점 변화)

  • Ahn, Yu-Min;Jung, Jae-Hoon;Choe, Seung-Urn
    • Journal of the Korean earth science society
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    • v.30 no.3
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    • pp.317-329
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    • 2009
  • By comparing the understandings of theology major with science major in a college, this study investigates how theology major students view the origin of universe and life and how they portray the view of sciences. In addition, this study examines how theology majors change their viewpoints through a series of lectures related to understanding of the modem sciences. Twenty six theology majors and nineteen science education majors participated in the survey investigation. For theology majors, questionnaire data revealed that 42% of theology majors support theistic evolution, while 42% responses with young and old Earth creation and none with evolutionism. On the other hand, most respondents in science education major espoused evolutionism and no one with extreme creationism. Most respondents with creationism shared the insights that science is an instrument for describing the creator's work, whereas most with evolutionisms perceived science as a logical and descriptive system of the natural world. After taking science courses, the theology majors' support of an extreme view like young Earth creationism has decreased by 4% (was 23%), while their support of the theistic evolution increased by a small percentage. This result lends support to the idea that science related courses helps theology major undergraduate students to understand the scientific evolutionism based on their theological backgrounds.

Gammaropsis utinomii New to Korea (Crustacea: Amphipoda: Photidae)

  • Kim, Young-Hyo;Lee, Kyung-Sook
    • Animal Systematics, Evolution and Diversity
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    • v.26 no.2
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    • pp.165-170
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    • 2010
  • Gammaropsis utinomii (Nagata, 1961), an incompletely known species of gammaridean amphipod, is redescribed in detail based on the specimens from the southern coast of Korea. The expanded basis of pereopod 7 of this species allows it to be distinguished from its congeners.

New Records of Three Hydroids (Cnidaria: Hydrozoa) in Korea

  • Park, Jung-Hee
    • Animal Systematics, Evolution and Diversity
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    • v.24 no.2
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    • pp.179-183
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    • 2008
  • Some hydroid specimens were collected by SCUBA diving from 10-25 m deep at Uljin (Nagok) and Jejudo Island (Munseom, Beomseom, Supseom). Among the identified species, three species Eudendrium racemosum (Gmelin, 1791), Sertularella diaphana(Allman, 1886) and Schizotricha divergens Naumov, 1960 are new to the Korean fauna.

Performance-based remaining life assessment of reinforced concrete bridge girders

  • Anoop, M.B.;Rao, K. Balaji;Raghuprasad, B.K.
    • Computers and Concrete
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    • v.18 no.1
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    • pp.69-97
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    • 2016
  • Performance-based remaining life assessment of reinforced concrete bridge girders, subject to chloride-induced corrosion of reinforcement, is addressed in this paper. Towards this, a methodology that takes into consideration the human judgmental aspects in expert decision making regarding condition state assessment is proposed. The condition of the bridge girder is specified by the assignment of a condition state from a set of predefined condition states, considering both serviceability- and ultimate- limit states, and, the performance of the bridge girder is described using performability measure. A non-homogeneous Markov chain is used for modelling the stochastic evolution of condition state of the bridge girder with time. The thinking process of the expert in condition state assessment is modelled within a probabilistic framework using Brunswikian theory and probabilistic mental models. The remaining life is determined as the time over which the performance of the girder is above the required performance level. The usefulness of the methodology is illustrated through the remaining life assessment of a reinforced concrete T-beam bridge girder.

Analysis of Substitution Events in HIV-1 vif Gene of the Korean Clade

  • Park, Chan-Seung;Kim, Mi-Sook;Yi, Hyun-Ah;Lee, Dong-Hun;Lee, Keon-Myung;Lee, Chan-Hee
    • Journal of Microbiology
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    • v.45 no.1
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    • pp.75-78
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    • 2007
  • Nucleotide and amino acid substitution pattern in vif gene of the Korean clade of HIV-1 isolated from Koreans were analyzed using consensus sequences. At nucleotide level, transition/transversion substitution ratio was 1.88, and nonsynonymous/synonymous substitution ratio was 2.67, suggesting a divergent evolution in the Korean clade. At amino acid level, there were 17 substitutions and $G{\rightarrow}E$ substitution at position 37 may be responsible for change in predicted secondary structure.

A Phylogenetic Analysis for Hox Linked Gene Families of Vertebrates

  • Kim, Sun-Woo;Jung, Gi-La;Lee, Jae-Hyoun;Park, Ha-Young;Kim, Chang-Bae
    • Animal cells and systems
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    • v.12 no.4
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    • pp.261-267
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    • 2008
  • The human chromosomes 2, 7, 12 and 17 show genomic homology around Hox gene clusters, is taken as evidence that these paralogous gene families might have arisen from a ancestral chromosomal segment through genome duplication events. We have examined protein data from vertebrate and invertebrate genomes to analyze the phylogenetic history of multi-gene families with three or more of their representatives linked to human Hox clusters. Topology comparison based upon statistical significance and information of chromosome location for these genes examined have revealed many of linked genes coduplicated with Hox gene clusters. Most linked genes to Hox clusters share the same evolutionary history and are duplicated in concert with each other. We conclude that gene families linked to Hox clusters may be suggestion of ancient genome duplications.