• Title/Summary/Keyword: biological

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A Study on the Cognition of Elementary School Students of Biological Resources (생물자원에 대한 초등학생의 인식 조사 연구)

  • Choi, Hyeh-Sook;Yeau, Sung-Hee;Kil, Ji-Hyon
    • Hwankyungkyoyuk
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    • v.22 no.4
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    • pp.26-39
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    • 2009
  • The purpose of this study was to investigate cognitions of elementary school students of the biological resources. Subjects were 252 elementary school students in Seoul and Busan. An instrument that measures cognitions consists of 3 components: kinds of biological and non-biological resources, values of biological resources and interest of using biological resources. The three components were composed of 46 items. They had less cognition of living things than non-biological resources as resources. But, most of them conceived ecological environment to be resources. Almost 80% elementary school students thought that biological resources had values contributing to the existence and health of human beings, but less economic values except ecological values. They had cognition of biological resources which we should manage and research in. It is time to need the educational approach to integrate nature, economy and environment in environmental education. As concrete cases of biological resources are proposed, it activate elementary school students to get cognition of biological resources. In conclusion, values of biological resources will be materials for environmental education.

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Unrecorded species of Korean ciliates (Protozoa, Ciliophora) discovered through the project of "Discovery of Korean Indigenous Species" (2006-2010)

  • Park, Mi-Hyun;Han, Yeong-Deok;Kwon, Choon Bong;Lee, Eun Sun;Kim, Ji Hye;Kang, Youn Seung;Kim, Se-Joo;Yang, Hee-Min;Park, Taeseo;Yoo, Jung-Sun;Kil, Hyun-Jong;Nam, Eunjung;Shin, Mann Kyoon;Min, Gi-Sik
    • Journal of Species Research
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    • v.6 no.spc
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    • pp.172-176
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    • 2017
  • In this list-format paper, we present unrecorded species of Korean ciliates (phylum Ciliophora). All species were selected from the final reports of the project: "Discovery of Korean Indigenous Species". This project has been carried out to discover and record various Korean indigenous species since 2006 and is funded by the National Institute of Biological Resources (NIBR). Among the various species, ciliates were a major taxon that was highlighted in this project as a speciose group categorized under Protozoa. This paper contains reports of 38 ciliates (8 classes, 16 orders, 23 families, and 34 genera) observed in Korea during the initial five years of the project (2006-2010).

A report on 29 unrecorded bacterial species isolated from the Nakdonggang River, Republic of Korea

  • Ahyoung Choi;Ja Young Cho;Soo-Yeong Lee;Ji Young Jung;Kiwoon Baek;Seoni Hwang;Eui-Jin Kim;Jaeduk Goh
    • Korean Journal of Environmental Biology
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    • v.42 no.2
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    • pp.143-157
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    • 2024
  • As part of the research program "Freshwater Prokaryotic Organisms Research and Discovery," freshwater samples were collected from the Nakdonggang River. After plating the samples on several culture media and incubating aerobically, approximately 900 bacterial strains were isolated and identified using 16S rRNA gene sequences. Among the bacterial isolates showing higher than 98.7% 16S rRNA gene sequence similarity with those of already confirmed bacterial species previously unreported in Korea, 29 strains were selected. These strains were phylogenetically diverse and belonged to 3 phyla, 6 classes, 13 orders, and 21 genera. At the genus level, these previously unreported species were found to be affiliated with Novosphingobium, Sphingomonas, Polymorphobacter, Croceibacterium, Devosia, Endobacterium, Agaricicola, Bradyrhizobium, Paracoccus, and Pseudotabrizicola of the class Alphaproteobacteria; Undibacterium, Azonexus, and Dechloromonas of the class Betaproteobacteria; Acinetobacter and Budvicia of the class Gammaproteobacteria; Streptomyces, Nocardioides, Mycobacterium, and Cellulomonas of the phylum Actinomycetota; Flavobacterium and Pedobacter of the phylum Bacteroidota. These species were further characterized by examining their Gram reaction, colony and cell morphologies, biochemical properties, and phylogenetic positions. Detailed descriptions of these 29 previously unreported species are provided.

Quantification of the galactose-operon mRNAs 5 bases different in their 5'-ends

  • Ji, Sang-Chun;Wang, Xun;Jeon, Heung-Jin;Yun, Sang-Hoon;Lee, Hee-Jung;Lim, Heon-M.
    • BMB Reports
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    • v.43 no.7
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    • pp.474-479
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    • 2010
  • Three assay methods for quantification of the two galactose-operon mRNAs that only differ by 5 bases in their 5'-end are presented. The 5' ends of each mRNA were extended by ligating the 3'-end of the abundant 5S rRNA. This ligation extends the 5' ends of the two gal mRNAs long enough to be distinguished by the specific PCR primers in the following quantification reactions. Quantification of the corresponding cDNAs was performed either by primer extension assay or real-time qPCR. To circumvent the problem of the RNA ligation reaction (i.e. very low ligation efficiency), we devised a new method that employs real-time qPCR directly for the quantification of the gal transcripts which differ by 5 bases in their 5'-ends.