• Title/Summary/Keyword: Research Diversity

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Genetic Polymorphisms in VIR Genes among Indian Plasmodium vivax Populations

  • Gupta, Purva;Pande, Veena;Das, Aparup;Singh, Vineeta
    • Parasites, Hosts and Diseases
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    • v.52 no.5
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    • pp.557-564
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    • 2014
  • The vir genes are antigenic genes and are considered to be possible vaccine targets. Since India is highly endemic to Plasmodium vivax, we sequenced 5 different vir genes and investigated DNA sequence variations in 93 single-clonal P. vivax isolates. High variability was observed in all the 5 vir genes; the vir 1/9 gene was highly diverged across Indian populations. The patterns of genetic diversity do not follow geographical locations, as geographically distant populations were found to be genetically similar. The results in general present complex genetic diversity patterns in India, requiring further in-depth population genetic and functional studies.

Foraminiferal Characteristics in Mud Deposits of the Southeastern Margin of Korea (한국 남동 대륙주변부 니질대 표층퇴적물의 유공충 특성)

  • Woo, Han-Jun;Choi, Jae-Ung
    • Ocean and Polar Research
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    • v.28 no.2
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    • pp.67-78
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    • 2006
  • Six surface sediments from two offshore transects of Ulsan and Gampo, on the southeastern margin of Korea were taken for sediment and foraminiferal analyses. Sedimentary processes are dominated by reworking and resedimentation from storms in the area off Ulsan and hemipelagic suspension settling in the area off Gampo. Eighty-four foraminiferal species were identified in total assemblages, including 33species of living populations and 9 species of planktonic foraminifera. The characteristics of foraminifera showed differences of offshore environments between Ulsan and Gampo. The number of living species, species diversity and equitability in Gampo offshore area had higher values than those in Ulsan offshore area. However, planktonic/benthic(P/B) ratio showed higher in the Ulsan offshore area. The species diversity indices and P/B ratio indicated that environmental stability and surface-ocean productivity in the Gampo offshore area were relatively higher than the Ulsan offshore area. The difference of species compositions is useful for interpreting the paleoenvironments in mud deposits of the southeastern margin of Korea.

An Empirical Study on the Integrated Organization Abilities in Third Party Logistics Korean Company for Reduction of Export Expense (수출비용절감을 위한 3PL업체의 통합조직능력에 관한 실증연구)

  • Lee, Sang-Ok;Lee, Moon-Kyu;Bang, Hyo-Sik
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.50
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    • pp.187-212
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    • 2011
  • Third party logistics research is searching for increasing its logistics efficiency of organization. Perspective of resource-based theory, this study is to reveal the exploratory relation between integrated capabilities, organzaiton knowledge, and service performance. To develop the relational model, this study conducted a theoretical survey on Shang(2009)'s 3PL service providers research model and Synder & Cumming(1998)'s learning of organization knowledge. According to the result of correlation analysis, Integrated organization knowledge is positively correlated with service diversity advantage (correlation coefficient= .670, p-value= .000) and service quality advantage (correlation coefficient= .575, p-value= .000). The thesis argued that Korean companies try to apply integrated organization abilities and service performance for cutting their export expense.

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Genetic Diversity among Indian Oak Tasar Silkworm, Antheraea proylei J. Revealed by ISSR Markers

  • Devi, Kanghujam Ibsorani;Ponnuvel, Kangayam M.;Singh, Laishram Somen;Singh, Kangjam Chaoba;Dutta, Karabi
    • International Journal of Industrial Entomology and Biomaterials
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    • v.24 no.2
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    • pp.57-61
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    • 2012
  • The Indian Oak Tasar silkworm, Antheraea proylei J. is a beneficial insect with great economic importance in India for its silk production. In this study, six populations of Antheraea proylei and A. frithi Moore (as an out group) were subjected to inter simple sequence repeat (ISSR) marker analysis in order to assess its genetic diversity. Fifteen ISSR primers produced 91 markers among different breeds of A. proylei and A. frithi of which 89 are polymorphic, generating 97.8% polymorphism. The dendrogram constructed using the Unweighted Pair Group Method with Arithmetic Mean (UPGMA) and cluster analysis made using Nei's genetic distance resulted in the formation of one major group containing four sub-groups separating the breeds. This result suggests that ISSR amplification is potentially useful for molecular characterization of oak tasar silkworm genotypes.

A Study on the Factors Affecting Chinese Consumers' Smartphone Adoption (중국소비자의 스마트폰 사용 의도에 영향을 미치는 요인)

  • Sun, Zhenbao;Park, Miyoun;Hwang, Kumju
    • Journal of Information Technology Applications and Management
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    • v.20 no.1
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    • pp.149-171
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    • 2013
  • The purpose of this study is to investigate factors influencing Chinese consumers' intention to adopt Smartphones. This paper examines Smartphone characteristics factors (situational dependence, diversity and security) and consumer personality characteristics (innovation, self-efficacy and familarity) based on the Technology Acceptance Model. The 320 sets of data are tested against the model using SEM (structural equation model). The research results reveal that diversity and security have significant influences on both perceived usefulness and perceived playfulness. According to the data analysis, self-efficacy affects only perceived easy of use, and familiarity positively affects perceived easy of use, usefulness and playfulness. This study finds that perceived easy of use and perceived usefulness have positive influences on behavioral intention to adopt Smartphones, and situational dependence and innovation directly affect the behavioral intention. The perceived cost has a negative impact on the behavioral intention. Research results are discussed, and limitations of the current study and future research are presented.

Copy Number Variations in the Human Genome: Potential Source for Individual Diversity and Disease Association Studies

  • Kim, Tae-Min;Yim, Seon-Hee;Chung, Yeun-Jun
    • Genomics & Informatics
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    • v.6 no.1
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    • pp.1-7
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    • 2008
  • The widespread presence of large-scale genomic variations, termed copy number variation (CNVs), has been recently recognized in phenotypically normal individuals. Judging by the growing number of reports on CNVs, it is now evident that these variants contribute significantly to genetic diversity in the human genome. Like single nucleotide polymorphisms (SNPs), CNVs are expected to serve as potential biomarkers for disease susceptibility or drug responses. However, the technical and practical concerns still remain to be tackled. In this review, we examine the current status of CNV DBs and research, including the ongoing efforts of CNV screening in the human genome. We also discuss the characteristics of platforms that are available at the moment and suggest the potential of CNVs in clinical research and application.

Matrix Metalloproteinase: Inhibitory Effect of Marine Substances on MMP-2 and MMP-9

  • Nguyen, Van-Tinh;Qian, Zhong-Ji;Jung, Won-Kyo
    • Journal of Integrative Natural Science
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    • v.4 no.4
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    • pp.255-265
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    • 2011
  • Marine ecosystems are often characterized by a high biological diversity, and it corresponds to a high chemical diversity. Up to present, more than 20,000 new bioactive substances have been isolated from marine organisms, where considerable numbers of these naturally occurring derivatives are developed as potential candidates for pharmaceutical application. In this process, screening of natural products from marine organisms that could potentially inhibit the expression of metalloproteinases has gained a huge popularity. Cancer is considered as one of the deadliest diseases in the medical field. Matrix metalloproteinase (MMPs) can degrade extracellular matrix (ECM) components and play important roles in a variety of biological and pathological processes. Matrix metalloproteinase inhibitors (MMPIs) have been identified as potential therapeutic candidates for metastasis, arthritis, chronic inflammation and wrinkle formation.

Selection Based Cooperative Beamforming and Power Allocation for Relay Networks

  • Liu, Yi;Nie, Weiqing
    • Journal of Communications and Networks
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    • v.13 no.4
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    • pp.377-384
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    • 2011
  • Cooperative beamforming has previously been proven to be an efficient way to improve the cooperative diversity. This method generally requires all relay nodes to participate in beamforming, which can be seen as "all participate" cooperative beamforming. However, not all relay nodes have constructive impacts on the end-to-end bit error rate (BER) performance. Based on this observation, we propose a new cooperative scheme which only selects those "appropriate" relay nodes to perform cooperative beamforming. Such relay nodes can be simply determined with mean channel gains. Therefore, the selection complexity is significantly reduced as global instantaneous channel state information is not required. This scheme guarantees that energy is only allocated to the "appropriate" relay nodes, and hence provides superior diversity. We also prove that power allocation among source and selected relay nodes is a convex problem, and can be resolved with lower computational complexity. Simulation results demonstrate that our scheme achieves an essential improvement in terms of BER performance for both optimal and limited feedback scenarios, as well as high energy-efficiency for the energy-constrained networks.

Two new species of Camellia (Theaceae) from Vietnam

  • NGUYEN, Lieu Thi;TRAN, Ninh;CHIYOMI, Uematsu;HIRONORI, Katayama;LUONG, Dung Van;HOANG, Son Thanh;NGUYEN, Ky Danh;NGUYEN, Hung Viet;THAI, Toan Canh
    • Korean Journal of Plant Taxonomy
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    • v.48 no.2
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    • pp.115-122
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    • 2018
  • Two new species of Camellia (Theaceae) are described from Vietnam: Camellia vuquangensis Luong, Tran & L. T. Nguyen and Camellia hatinhensis Luong, Tran & L. T. Nguyen. The new taxa were collected from Vu Quang National Park in the center of Vietnam. The new finds are morphologically dissimilar to all known Camellia species. Recent Camellia discoveries have increased the number of species recorded in Vietnam from 50 to 75, making Vietnam a center of diversity and a crucial area for more research into the diversity and distributions of Camellia.

A New Free-Living Marine Nematode, Chaetonema longicorpus sp. nov. (Enoplida: Anoplostomatidae) from a Subtidal Zone of the East Sea, Korea

  • Lee, Hyo Jin;Lee, Heegab;Rho, Hyun Soo
    • Animal Systematics, Evolution and Diversity
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    • v.38 no.4
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    • pp.205-213
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    • 2022
  • A new free-living marine nematode, Chaetonema longicorpus sp. nov., was discovered in a subtidal benthic habitat around the Uljin nuclear power plant in the East Sea. Chaetonema longicorpus sp. nov. differs from other Chaetonema species in its very long body length, relatively long cephalic setae, long and narrow buccal cavity, bottle-shaped amphideal fovea, short spicules, only one pre-cloacal seta instead of a pre-cloacal supplement, and conspicuous ventral swelling at the middle of the tail. Herein, we provide a taxonomic description and illustrations of this new species using differential interference contrast microscopy. Furthermore, an illustrated pictorial key to all valid species, including the new species and comparative tables on the biogeographical and morphological characteristics of the genus Chaetonema, are provided.