The Experts below are selected from a list of 1293 Experts worldwide ranked by ideXlab platform
Dong Woon Lee - One of the best experts on this subject based on the ideXlab platform.
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Nematicidal Activity of Eclipta prostrata Extract and Terthiophene against Pine Wood Nematode, Bursaphelenchus xylophilus
The Korean Journal of Pesticide Science, 2016Co-Authors: Jin Hee Shin, Oh-gyeong Kwon, Chae Min Lee, Sang Myeong Lee, Young Hwa Choi, Jin Ho Kim, Young Sub Kim, Dong Woon LeeAbstract:Abstract Pine wood nematode, Bursaphlenchus xylophilus is a fatal damaging pest, infecting pinewoodtrees and is one of the serious forest pest in Korea. Trunk injection is one of the most effective method toprotect the live pine trees from nematode infection. The aim of this research was to reveal the efficacy of thenematicidal materials from 46 Kyrgyzstan, 88 Vietnam plant materials and 21 active materials (α-terpinene,α-pinene, β-thujaplicin, cinnamaldehyde, eugenol, emodin, geraniol, limonone, methyl palmitate, matrine, myrcene,methyl gallate, nicotine, quassin, resveratrol, rotenone, thymol, thujaplicin, terthiophene, tuberstemonine, γ-terpinene) isolated from plants for using as trunk injection agents. Eclipta prostrata extract was highlyeffective against pine wood nematode in plant extracts and terthiophene has the best nematicidal activity fromactive materials isolated from plants. Foliar spray of terthiophene on Japanese black pine (Pinus thunbergii)tree reduced proliferation of inoculated pine wood nematode at 22 days after treatment, however no efficacywas found over 22 days. Eclipta prostrata extract and terthiophene can be used as nematicide for furthernematicidal efficacy test against any other plant parasitic nematodes and trunk injection efficacy against pinewood nematode. Key words Kyrgyzstan, pine tree, plant extract, trunk injection, Vietnam
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nematicidal activity of Eclipta prostrata extract and terthiophene against pine wood nematode bursaphelenchus xylophilus
The Korean Journal of Pesticide Science, 2016Co-Authors: Jin Hee Shin, Oh-gyeong Kwon, Chae Min Lee, Sang Myeong Lee, Young Hwa Choi, Jin Ho Kim, Young Sub Kim, Dong Woon LeeAbstract:Abstract Pine wood nematode, Bursaphlenchus xylophilus is a fatal damaging pest, infecting pinewoodtrees and is one of the serious forest pest in Korea. Trunk injection is one of the most effective method toprotect the live pine trees from nematode infection. The aim of this research was to reveal the efficacy of thenematicidal materials from 46 Kyrgyzstan, 88 Vietnam plant materials and 21 active materials (α-terpinene,α-pinene, β-thujaplicin, cinnamaldehyde, eugenol, emodin, geraniol, limonone, methyl palmitate, matrine, myrcene,methyl gallate, nicotine, quassin, resveratrol, rotenone, thymol, thujaplicin, terthiophene, tuberstemonine, γ-terpinene) isolated from plants for using as trunk injection agents. Eclipta prostrata extract was highlyeffective against pine wood nematode in plant extracts and terthiophene has the best nematicidal activity fromactive materials isolated from plants. Foliar spray of terthiophene on Japanese black pine (Pinus thunbergii)tree reduced proliferation of inoculated pine wood nematode at 22 days after treatment, however no efficacywas found over 22 days. Eclipta prostrata extract and terthiophene can be used as nematicide for furthernematicidal efficacy test against any other plant parasitic nematodes and trunk injection efficacy against pinewood nematode. Key words Kyrgyzstan, pine tree, plant extract, trunk injection, Vietnam << ORCIDDong-Woon Leehttp://orcid.org/0000-0001-9751-5390
Hua Zhang - One of the best experts on this subject based on the ideXlab platform.
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Thiophene enantiomers from the aerial parts of Eclipta prostrata.
Journal of Asian natural products research, 2020Co-Authors: Jun-sheng Zhang, Jie Bao, Hua ZhangAbstract:Ten thiophene derivatives (1-10), including two previously undescribed ones (1 and 2), have been obtained and structurally characterized from the aerial parts of a traditional Chinese herb Eclipta prostrata. Six of them with one chiral center were identified to be scalemic mixtures, and the pure enantiomers of two isolates (1 and 3) were successfully separated via chemical derivatization and chiral HPLC, with the absolute configurations being established by analysis of optical rotations. All the thiophenes were subjected to a series of assays and compounds 9 and 10 exhibited mild antibacterial activity against Staphylococcus aureus.[Formula: see text].
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New antibacterial thiophenes from Eclipta prostrata
Fitoterapia, 2020Co-Authors: Jie Bao, Jun-sheng Zhang, Yin-yin Wang, Hua ZhangAbstract:Three new thiophene derivatives, ecliprostins A-C (1-3), have been isolated from the aerial parts of a Compositae medicinal plant Eclipta prostrata, and structures of them have been elucidated by comprehensive spectroscopic analyses. Both ecliprostins A (1) and B (2) feature an acetylenic bithiophenyl backbone and also incorporate an isovalerate moiety, while ecliprostin C (3) is a symmetrical dimer of compound 1 and represents the first example bonded via an ether bridge among the very limited natural dimers. All three compounds show antibacterial activity against Staphylococcus aureus.
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Bioactive terpenoid constituents from Eclipta prostrata.
Phytochemistry, 2019Co-Authors: Xue Yan, Jun-sheng Zhang, Jin-yue Sun, Hua ZhangAbstract:Abstract Chemical fractionation of the ethanolic extract of Eclipta prostrata yielded a series of unreported terpenoid constituents, including a rare 6/6/6/6-fused tetracyclic triterpenoid, a pentacyclic triterpenoid, two pentacyclic triterpenoid saponins, a diterpenoid and a sesquiterpenoid. Structures were assigned to these compounds on the basis of comprehensive spectroscopic analyses, with the absolute configurations of the tetracyclic triterpenoid, the diterpenoid and the sesquiterpenoid being determined via explanation of electronic circular dichroism data. Screening of these isolates in an array of bioassays revealed antibacterial, cytotoxic and α-glucosidase inhibitory activities for selective compounds. Of particular interest, the tetracyclic triterpenoid showed very strong inhibition against α-glucosidase with an IC50 of 0.82 ± 0.18 μM, being 103-fold as active as the positive control acarbose.
Jin Hee Shin - One of the best experts on this subject based on the ideXlab platform.
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Nematicidal Activity of Eclipta prostrata Extract and Terthiophene against Pine Wood Nematode, Bursaphelenchus xylophilus
The Korean Journal of Pesticide Science, 2016Co-Authors: Jin Hee Shin, Oh-gyeong Kwon, Chae Min Lee, Sang Myeong Lee, Young Hwa Choi, Jin Ho Kim, Young Sub Kim, Dong Woon LeeAbstract:Abstract Pine wood nematode, Bursaphlenchus xylophilus is a fatal damaging pest, infecting pinewoodtrees and is one of the serious forest pest in Korea. Trunk injection is one of the most effective method toprotect the live pine trees from nematode infection. The aim of this research was to reveal the efficacy of thenematicidal materials from 46 Kyrgyzstan, 88 Vietnam plant materials and 21 active materials (α-terpinene,α-pinene, β-thujaplicin, cinnamaldehyde, eugenol, emodin, geraniol, limonone, methyl palmitate, matrine, myrcene,methyl gallate, nicotine, quassin, resveratrol, rotenone, thymol, thujaplicin, terthiophene, tuberstemonine, γ-terpinene) isolated from plants for using as trunk injection agents. Eclipta prostrata extract was highlyeffective against pine wood nematode in plant extracts and terthiophene has the best nematicidal activity fromactive materials isolated from plants. Foliar spray of terthiophene on Japanese black pine (Pinus thunbergii)tree reduced proliferation of inoculated pine wood nematode at 22 days after treatment, however no efficacywas found over 22 days. Eclipta prostrata extract and terthiophene can be used as nematicide for furthernematicidal efficacy test against any other plant parasitic nematodes and trunk injection efficacy against pinewood nematode. Key words Kyrgyzstan, pine tree, plant extract, trunk injection, Vietnam
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nematicidal activity of Eclipta prostrata extract and terthiophene against pine wood nematode bursaphelenchus xylophilus
The Korean Journal of Pesticide Science, 2016Co-Authors: Jin Hee Shin, Oh-gyeong Kwon, Chae Min Lee, Sang Myeong Lee, Young Hwa Choi, Jin Ho Kim, Young Sub Kim, Dong Woon LeeAbstract:Abstract Pine wood nematode, Bursaphlenchus xylophilus is a fatal damaging pest, infecting pinewoodtrees and is one of the serious forest pest in Korea. Trunk injection is one of the most effective method toprotect the live pine trees from nematode infection. The aim of this research was to reveal the efficacy of thenematicidal materials from 46 Kyrgyzstan, 88 Vietnam plant materials and 21 active materials (α-terpinene,α-pinene, β-thujaplicin, cinnamaldehyde, eugenol, emodin, geraniol, limonone, methyl palmitate, matrine, myrcene,methyl gallate, nicotine, quassin, resveratrol, rotenone, thymol, thujaplicin, terthiophene, tuberstemonine, γ-terpinene) isolated from plants for using as trunk injection agents. Eclipta prostrata extract was highlyeffective against pine wood nematode in plant extracts and terthiophene has the best nematicidal activity fromactive materials isolated from plants. Foliar spray of terthiophene on Japanese black pine (Pinus thunbergii)tree reduced proliferation of inoculated pine wood nematode at 22 days after treatment, however no efficacywas found over 22 days. Eclipta prostrata extract and terthiophene can be used as nematicide for furthernematicidal efficacy test against any other plant parasitic nematodes and trunk injection efficacy against pinewood nematode. Key words Kyrgyzstan, pine tree, plant extract, trunk injection, Vietnam << ORCIDDong-Woon Leehttp://orcid.org/0000-0001-9751-5390
Guilherme Suarez-kurtz - One of the best experts on this subject based on the ideXlab platform.
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Inhibition of the myotoxic and hemorrhagic activities of crotalid venoms by Eclipta prostrata (Asteraceae) extracts and constituents
Toxicon, 1994Co-Authors: Paulo A. Melo, M.c. Do Nascimento, Walter B Mors, Guilherme Suarez-kurtzAbstract:Abstract P. A. Melo , M. C. do Nascimento , W. B. Mors and G. Suarez-Kurtz . Inhibition of the myotoxic and hemorrhagic activities of crotalid venoms by Eclipta prostrata (Asteraceae) extracts and constitutents. Toxicon32, 595–603, 1994.—The antimyotoxic and antihemorrhagic effects of Eclipta prostrata (EP) and three of its constituents (wedelolactone, WE; stigmaterol, ST; and sitosterol, SI) were investigated. The myotoxicity of crotalid venoms (Bothrops jararaca, Bothrops jararacussu and Lachesis muta), purified myotoxins (bothropstoxin, BthTX; bothropasin; and crotoxin), and polylysine was quantified in vitro by the release rate of creatine kinase (CK) from rat or mouse extensor digitorum muscles, and in vivo by the plasma CK activity in mice. The in vitro myotoxicity of the crotalid venoms and myotoxins was neutralized by simultaneous exposure of the muscles to an aqueous extract of EP or to WE. ST and SI were less effective than WE, but interacted synergistically with it. Both the EP extract and WE failed to neutralize the in vitro myotoxic effects of polylysine. The in vivo myotoxicity of venoms and myotoxins was neutralized by their preincubation with the EP extract or WE. Intravenous administration of the plant extract or WE attenuated the increase in plasma CK activity induced by subsequent intramuscular injections of the crotalid venoms or the myotoxins. EP and WE inhibited the hemorrhagic effect of B. jararaca venom, as well as the phospholipase A2 activity of crotoxin and the proteolytic activity of B. jararaca venom. The data provide direct evidence for antimyotoxic and antihemorrhagic effects of EP and WE against the crotalid venoms responsible for most cases of envenomation by snakebites in Brazil. These effects are interpreted as consequences of antiproteolytic and antiphospholipase A2 activities of EP and its constituents.
Chae Min Lee - One of the best experts on this subject based on the ideXlab platform.
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Nematicidal Activity of Eclipta prostrata Extract and Terthiophene against Pine Wood Nematode, Bursaphelenchus xylophilus
The Korean Journal of Pesticide Science, 2016Co-Authors: Jin Hee Shin, Oh-gyeong Kwon, Chae Min Lee, Sang Myeong Lee, Young Hwa Choi, Jin Ho Kim, Young Sub Kim, Dong Woon LeeAbstract:Abstract Pine wood nematode, Bursaphlenchus xylophilus is a fatal damaging pest, infecting pinewoodtrees and is one of the serious forest pest in Korea. Trunk injection is one of the most effective method toprotect the live pine trees from nematode infection. The aim of this research was to reveal the efficacy of thenematicidal materials from 46 Kyrgyzstan, 88 Vietnam plant materials and 21 active materials (α-terpinene,α-pinene, β-thujaplicin, cinnamaldehyde, eugenol, emodin, geraniol, limonone, methyl palmitate, matrine, myrcene,methyl gallate, nicotine, quassin, resveratrol, rotenone, thymol, thujaplicin, terthiophene, tuberstemonine, γ-terpinene) isolated from plants for using as trunk injection agents. Eclipta prostrata extract was highlyeffective against pine wood nematode in plant extracts and terthiophene has the best nematicidal activity fromactive materials isolated from plants. Foliar spray of terthiophene on Japanese black pine (Pinus thunbergii)tree reduced proliferation of inoculated pine wood nematode at 22 days after treatment, however no efficacywas found over 22 days. Eclipta prostrata extract and terthiophene can be used as nematicide for furthernematicidal efficacy test against any other plant parasitic nematodes and trunk injection efficacy against pinewood nematode. Key words Kyrgyzstan, pine tree, plant extract, trunk injection, Vietnam
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nematicidal activity of Eclipta prostrata extract and terthiophene against pine wood nematode bursaphelenchus xylophilus
The Korean Journal of Pesticide Science, 2016Co-Authors: Jin Hee Shin, Oh-gyeong Kwon, Chae Min Lee, Sang Myeong Lee, Young Hwa Choi, Jin Ho Kim, Young Sub Kim, Dong Woon LeeAbstract:Abstract Pine wood nematode, Bursaphlenchus xylophilus is a fatal damaging pest, infecting pinewoodtrees and is one of the serious forest pest in Korea. Trunk injection is one of the most effective method toprotect the live pine trees from nematode infection. The aim of this research was to reveal the efficacy of thenematicidal materials from 46 Kyrgyzstan, 88 Vietnam plant materials and 21 active materials (α-terpinene,α-pinene, β-thujaplicin, cinnamaldehyde, eugenol, emodin, geraniol, limonone, methyl palmitate, matrine, myrcene,methyl gallate, nicotine, quassin, resveratrol, rotenone, thymol, thujaplicin, terthiophene, tuberstemonine, γ-terpinene) isolated from plants for using as trunk injection agents. Eclipta prostrata extract was highlyeffective against pine wood nematode in plant extracts and terthiophene has the best nematicidal activity fromactive materials isolated from plants. Foliar spray of terthiophene on Japanese black pine (Pinus thunbergii)tree reduced proliferation of inoculated pine wood nematode at 22 days after treatment, however no efficacywas found over 22 days. Eclipta prostrata extract and terthiophene can be used as nematicide for furthernematicidal efficacy test against any other plant parasitic nematodes and trunk injection efficacy against pinewood nematode. Key words Kyrgyzstan, pine tree, plant extract, trunk injection, Vietnam << ORCIDDong-Woon Leehttp://orcid.org/0000-0001-9751-5390
