• Title/Summary/Keyword: Ecology Resources

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Contribution to Taxonomy and Distribution of the Genus Elaphropoda (Hymenoptera: Apidae: Apinae) in Vietnam

  • Nguyen, Minh Phuong;Tran, Ngat Thi;Nguyen, Dai Dac;Nguyen, Lien Thi Phuong
    • Animal Systematics, Evolution and Diversity
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    • v.32 no.2
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    • pp.118-122
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    • 2016
  • Taxonomic notes on the genus Elaphropoda Lieftinck, 1966 (Hymenoptera: Apidae) from Vietnam are presented. Two species of the genus are reported: Elaphropoda percarinata (Cockerell, 1930) was first recorded from Vietnam based on specimens collected from Ha Tinh province in 1998, and is reconfirmed with a specimens collected from Bac Kan province in the Northeastern part of the country in this study, and Elaphropoda khasiana (Schulz, 1906) is recorded from Vietnam for the first time. Redescriptions of the male of E. percarinata and the female of E. khasiana are given with illustrations.

Vertical Distribution and Feeding Ecology of the Mirror Dory Zenopsis nebulosa in the Southern Sea of Korea (우리나라 남해안에 서식하는 민달고기(Zenopsis nebulosa)의 수직분포와 식성)

  • Kim, Hye Rim;Kim, Jung Yun;Kim, Hee Yong;Choi, Gwang Ho;Choi, Jung Hwa
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.46 no.6
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    • pp.973-976
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    • 2013
  • We observed the vertical distribution and feeding ecology of the Mirror dory, Zenopsis nebulosa, in the Southern Sea of Korea from 2009 to 2013 using an otter trawl. The total length of captured individuals ranged from 11 to 48 cm. Individuals captured at greater depths were significantly larger than those from shallower sites. Fish abundance was significantly related to depth and temperature. We found that 89% of the total catch was obtained at depths between 80 and 140 meters. Prey organisms, including fish, crustaceans, and cephalopods, were found in Z. nebulosa stomachs. Fishes were the main prey items for all size groups. Cephalopods were consumed by individuals > 25 cm in length. Our findings suggested that the vertical distribution of Z. nebulosa varied with depth and temperature, and that the fish are carnivores.

Additions to the Knowledge of the Genus Phimenes (Hymenoptera: Vespidae: Eumeninae) from Vietnam

  • Nguyen, Lien Thi Phuong;Nguyen, Dac Dai;Carpenter, James M.
    • Animal Systematics, Evolution and Diversity
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    • v.32 no.1
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    • pp.21-27
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    • 2016
  • The solitary wasp genus Phimenes (Hymenoptera: Vespidae: Eumeninae) was reported to occur in Vietnam by , represented by one taxon, Phimenes flavopictus continentalis (Zimmermann), which was synonymized under nominotypical Phimenes flavopictus by . A note on gender of this genus is made in the text. One more species, Phimenes indosinensis is recorded in this study from Dak Lak in the southern and Son La in the northwestern parts of Vietnam for the first time. Detailed descriptions of the female and male of the latter are provided with figures. A key to the two species from Vietnam is also provided.

Screening of Anti-Biofilm Compounds from Marine-Derived Fungi and the Effects of Secalonic Acid D on Staphylococcus aureus Biofilm

  • Wang, Jie;Nong, Xu-Hua;Zhang, Xiao-Yong;Xu, Xin-Ya;Amin, Muhammad;Qi, Shu-Hua
    • Journal of Microbiology and Biotechnology
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    • v.27 no.6
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    • pp.1078-1089
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    • 2017
  • Biofilm formation of Staphylococcus aureus is one of its mechanisms of drug resistance. Anti-biofilm screening of 106 compounds from marine-derived fungi displayed that 12 compounds inhibited S. aureus biofilm formation by >50% at the concentration of $100{\mu}g/ml$, and only secalonic acid D (SAD) and B inhibited by >90% at $6.25{\mu}g/ml$ without inhibiting cell growth after 24-h incubation. Meanwhile, it was found that the double bond between C-1 and C-10 of citrinin derivatives and the C-C connection position of two chromone monomers may be important for their anti-biofilm activities. Moreover, SAD slightly facilitated biofilm eradication and influenced its architecture. Furthermore, SAD slowed the cell growth rate in the preceding 18-h incubation and differentially regulated transcriptional expression of several genes, such as agr, isaA, icaA, and icaD, associated with biofilm formation in planktonic and biofilm cells, which may be the reason for the anti-biofilm activity of SAD. Finally, SAD acted synergistically against S. aureus growth and biofilm formation with other antibiotics. These findings indicated that various natural products from marine-derived fungi, such as SAD, could be used as a potential biofilm inhibitor against S. aureus.

An Unrecorded Alien Species in Korea: Phalaris paradoxa L. (Poaceae) (한국 미기록 외래식물: 날개카나리새풀(벼과))

  • Ryu, Tae-bok;Lee, Seung-eun;Kim, Deokki;Choi, Dong-hee;Kim, Nam-young
    • Korean Journal of Plant Resources
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    • v.31 no.1
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    • pp.52-55
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    • 2018
  • An unrecorded alien species plant, Phalaris paradoxa L. (Poaceae) was found in Andeok-myeon, Seogwipo-si, Jeju island, Korea. It is native to the Mediterranean region of Europe, and it is currently found worldwide. Phalaris paradoxa is distinguishable from related taxa (P. arundinacea, P. canariensis, P. minor and P. arundinacea var. picta) in Korea by the following combination of characterstics: spikelets in clusters (the upper central fertile spikelet surrounded by six lower sterile spikelets), wing of the keel. This taxon was named 'Nal-gae-ca-na-ri-sae-pul' in Korean based on its character. We provide its description, illustrations, photographs and a key of related taxa in Korea.

A Study on Stress Level and Coping Strategies of Reemployed Wives (재취업 주부의 스트레스 인지정도 및 대처방법에 관한 연구)

  • Hong, Dal-Ah-Gi
    • Korean Journal of Human Ecology
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    • v.7 no.1
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    • pp.97-108
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    • 1998
  • The purpose of this study was to examine the family resources, stress level, and coping strategies of reemployed wives, to direct the better psycho-physical environment, and to enhance the quality of their home environment for reemployed wives. The data were analyzed with the frequency, percentage, factor analysis, mean(S.D), reliability, and regression using SPSS windows program. The major findings were as follows : (1) There were significant relationships between demographic and socioeconomic characteristics of the family resources and stress level. Personal-psycho resources was important variable in the family resources. The household work and value of household work were most influential. (2) Influential variables on stress level were income and working hours, resources of family task sharing. (3) Influential variables on coping strategies were age, reemployed time, and family task sharing. Coping strategies was effected by the reasons of employment.

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