[Objective] The nematicidal activity of plant extracts was investigated. We aimed to explore a kind of botanical pesticide to control Hirschmanniella spp. [Method] The Chuanxiong （root）, agrimony （whole plant）, co...[Objective] The nematicidal activity of plant extracts was investigated. We aimed to explore a kind of botanical pesticide to control Hirschmanniella spp. [Method] The Chuanxiong （root）, agrimony （whole plant）, cocklebur （grain）, basil （leaves）, ragweed （stems and leaves）, green onion （root）, garlic （tuber）, Yuzhu （leaves）, marshpeper smartweed （whole plant）, horseweed （aboveground stems and leaves） were dried, grinded and sieved. The powders were then extracted by ethanol at room temperature for 24 h. The extract solutions were filtered through fil- ter pater. The obtained plant extracts were then diluted to determine their nematici- dal activities. [Result] The Chuanxiong extract had the highest nematicidal activity, followed by cocklebur extract, agrimony extract, basil extract, garlic extract, ragweed extract. The horseweed extract had the lowest nematicidal activity. [Conclusion] The Chuanxiong and other plants were natural, and they had a good environmental compatibility. They could be developed as botanical pesticides against Hirschman- niella spp.展开更多
Helicobacter pylori(H pylori),a gastric pathogen,is a major cause of chronic gastritis and peptic ulcer disease,and is an important risk factor for the development of gastric malignancies.Culture of the bacterium from...Helicobacter pylori(H pylori),a gastric pathogen,is a major cause of chronic gastritis and peptic ulcer disease,and is an important risk factor for the development of gastric malignancies.Culture of the bacterium from gastric biopsy is essential for the determination of drug resistance of H pylori.However,the isolation rates of H pylori from infected individuals vary from 23.5%to 97% due to a number of factors such as biopsy preparation,cultural environment,medium and the method adopted.In the present case,we found that a prolonged incubation period of up to 19 d allowed successful isolation of H pylori from a patient who received triple therapy that failed to eradicate the bacterium.展开更多
基金Supported by Science and Technology Project of Hunan Provincial Department of Education(11A059)Earmarked Fund for China Agriculture Research System(CARS19-05B)~~
文摘[Objective] The nematicidal activity of plant extracts was investigated. We aimed to explore a kind of botanical pesticide to control Hirschmanniella spp. [Method] The Chuanxiong （root）, agrimony （whole plant）, cocklebur （grain）, basil （leaves）, ragweed （stems and leaves）, green onion （root）, garlic （tuber）, Yuzhu （leaves）, marshpeper smartweed （whole plant）, horseweed （aboveground stems and leaves） were dried, grinded and sieved. The powders were then extracted by ethanol at room temperature for 24 h. The extract solutions were filtered through fil- ter pater. The obtained plant extracts were then diluted to determine their nematici- dal activities. [Result] The Chuanxiong extract had the highest nematicidal activity, followed by cocklebur extract, agrimony extract, basil extract, garlic extract, ragweed extract. The horseweed extract had the lowest nematicidal activity. [Conclusion] The Chuanxiong and other plants were natural, and they had a good environmental compatibility. They could be developed as botanical pesticides against Hirschman- niella spp.
基金Supported by The Grant"Research of the Helicobacter pylori gene engineering vaccine"from Hi-tech research and development(863)program of China,Grant No.2001AA21516102National Science and Technology Infrastructure Program,Grant No.2007BAI04B02
文摘Helicobacter pylori(H pylori),a gastric pathogen,is a major cause of chronic gastritis and peptic ulcer disease,and is an important risk factor for the development of gastric malignancies.Culture of the bacterium from gastric biopsy is essential for the determination of drug resistance of H pylori.However,the isolation rates of H pylori from infected individuals vary from 23.5%to 97% due to a number of factors such as biopsy preparation,cultural environment,medium and the method adopted.In the present case,we found that a prolonged incubation period of up to 19 d allowed successful isolation of H pylori from a patient who received triple therapy that failed to eradicate the bacterium.
