匿名使用者
匿名使用者 發問時間: 社會與文化語言 · 1 0 年前

英文強的人~看一下

In recent years, use of environment friendly and biodegradable natural insecticides of plant origin have received renewed attention as agents for vector control. In this study, essential oils extracted by steam distillation from leaves of five plant species Centella asiatica L., Ipomoea cairica L., Momordica charantia L., Psidium guajava L. and Tridax procumbens L. were evaluated for their topical repellency effects against malarial vector Anopheles stephensi in mosquito cages. All essential oils were tested at three different concentrations (2, 4 and 6%). Of these, the essential oils of I. cairica, M. charantia and T. procumbens exhibited relatively high repellency effect (>300 minutes at 6% concentration), followed by C. asiatica and P. guajava which showed less effective (<150 minutes at 6 % concentration). However, the ethanol applied arm served as control provided maximum 8.0 minutes repellency in this study. In general, clear dose–response relationships were established in all essential oils, with the highest concentration of 6% provided high repellency effect. The results obtained from this study suggest that essential oils of I. cairica, M. charantia and T. procumbens are promising as repellents at 6% concentration against An. stephensi and could be useful in the search for new natural repellent compounds.

謝謝!!

3 個解答

評分
  • f
    Lv 4
    1 0 年前
    最佳解答

    In recent years, use of environment friendly and biodegradable natural insecticides of plant origin have received renewed attention as agents for vector control.

    近年來,使用對環境友善(或具環保)及可生物分解的天然植物性殺蟲劑來作為控制病菌媒介的天然方式重新獲得注意

    In this study, essential oils extracted by steam distillation from leaves of five plant species Centella asiatica L., Ipomoea cairica L., Momordica charantia L., Psidium guajava L. and Tridax procumbens L. were evaluated for their topical repellency effects against malarial vector Anopheles stephensi in mosquito cages.

    在這項研究之中,透過採集Centella asiatica L., Ipomoea cairica L., Momordica charantia L., Psidium guajava L.和 Tridax procumbens L.等五種植物葉片並以蒸餾的方式萃取精油,檢視他們對於蚊子箱中瘧疾帶原蚊的整體對抗性

    All essential oils were tested at three different concentrations (2, 4 and 6%).

    所有的精油都以三種不同的濃度來進行測試(2, 4 and 6%)

    Of these, the essential oils of I. cairica, M. charantia and T. procumbens exhibited relatively high repellency effect (&gt;300 minutes at 6% concentration), followed by C. asiatica and P. guajava which showed less effective (&lt;150 minutes at 6 % concentration).

    在這些測試當中,I. cairica, M. charantia 及 T. procumbens 三種展現極高的對抗效果(在濃度6%時,測試超過300分鐘),其次是C. asiatica 及 P. guajava(在濃度6%時,測試低於150分鐘)

    However, the ethanol applied arm served as control provided maximum 8.0 minutes repellency in this study.

    然而,在這研究當中,在塗抹酒精手臂上可以有最多八分鐘的對抗效果

    In general, clear dose–response relationships were established in all essential oils, with the highest concentration of 6% provided high repellency effect.

    一般來說,在已建置所有精油的使用劑量與反應之間的精確關係中,以6%的最高濃度的對抗性最佳

    The results obtained from this study suggest that essential oils of I. cairica, M. charantia and T. procumbens are promising as repellents at 6% concentration against An. stephensi and could be useful in the search for new natural repellent compounds.

    由這個研究所得到的結果顯示,I. cairica、 M. charantia 及 T. procumbens濃度6%的精油對於瘧蚊的對抗性顯著,可以用來研發新的對抗性複方

  • ?
    Lv 5
    1 0 年前

    In recent years, use of environment friendly and biodegradable natural insecticides of plant origin have received renewed attention as agents for vector control. In this study, essential oils extracted by steam distillation from leaves of five plant species Centella asiatica L., Ipomoea cairica L., Momordica charantia L., Psidium guajava L. and Tridax procumbens L. were evaluated for their topical repellency effects against malarial vector Anopheles stephensi in mosquito cages. All essential oils were tested at three different concentrations (2, 4 and 6%). Of these, the essential oils of I. cairica, M. charantia and T. procumbens exhibited relatively high repellency effect (>300 minutes at 6% concentration), followed by C. asiatica and P. guajava which showed less effective (<150 minutes at 6 % concentration). However, the ethanol applied arm served as control provided maximum 8.0 minutes repellency in this study. In general, clear dose–response relationships were established in all essential oils, with the highest concentration of 6% provided high repellency effect. The results obtained from this study suggest that essential oils of I. cairica, M. charantia and T. procumbens are promising as repellents at 6% concentration against An. stephensi and could be useful in the search for new natural repellent compounds.

    近年來,環境植物起源的友好和可生物降解的自然的殺蟲劑的使用已經為向量控制得到更新的注意作為代理人。 在這項研究過程中, 從5 個植物種類Centella asiatica L.,Ipomoea cairica L.,Momordica charantia L.,Psidium guajava L.葉子被蒸汽蒸餾物選出香精油 以及Tridax procumbens L。 在蚊子籠裡被對瘧疾的矢量按蚊的stephensi 為他們的與目前有關的嫌惡影響評價。 全部香精油被在3 不同的集中(2,4和6%)測試 . 在這些中,我,本質加油。 cairica,M。 charantia和T。 procumbens 展覽比較高嫌惡影響(>6% 集中的300 分鐘) ,隨後有C。 asiatica和頁 顯示不那麼有效的(<在百分之6的集中150 分鐘)的guajava . 不過,酒精使用臂作為控制提供最大8.0 分鐘嫌惡在這研究內。 通常,清楚的doseesponse 關係被在全部香精油內建立,帶有6%的最高的集中提供高的嫌惡影響。 結果從這研究獲得建議那必要我的油。 cairica,M。 charantia和T。 procumbens正對A作為在6%的集中的驅虫劑許諾。 stephensi 和可能有用在去新自然令人討厭化合物的那些搜尋。

  • 1 0 年前

    在近年來,使用環保和生物降解的植物天然殺蟲劑,已收到重新重視,作為代理人的矢量控制。在這項研究中,揮發油中提取的水蒸氣蒸餾法從葉片5植物物種積雪的影響,蕹菜cairica的研究,苦瓜,番石榴和tridax procumbens影響評價他們的熱門話題驅避作用對瘧疾的載體按蚊在蚊子的雞籠。所有的精油,測試在三種不同濃度( 2 , 4和6 % ) 。這些,精油的一cairica ,米charantia和T. procumbens展示了相對較高的驅避作用( “ &gt; 300分鐘在6 %的濃度) ,其次是長積雪和體育guajava顯示效果較差” ( &lt; 150分鐘在6 %的濃度) 。但是,乙醇的應用手臂充當控制提供最大的八點○分鐘拒在這方面的研究。在一般的,明確的劑量-反應關係建立在所有的精油,具有最高濃度的6 % ,所提供的高驅避作用。所取得的成果,從本研究表明,揮發油一cairica ,米charantia和T. procumbens是大有希望的作為驅避劑在6 %的濃度對1 。 stephensi和可能是有用的在尋找新的天然化合物塗。

    參考資料: me and google
還有問題?馬上發問,尋求解答。