|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | DPPH antiradical scavenging, anthelmintic and phytochemical studies of Cissus poulnea rhizomes显示文摘Objective: To investigate the phytochemical constituents, antioxidant and anthelmintic activities of the crude methanol extract of Cissus populnea(C. populnea) rhizomes. Methods: Phytochemical screening was performed using standard protocols, and column chromatography of silica gel was used for the compounds isolation. DPPH antiradical scavenging assay was performed in order to evaluate the antioxidant activity. Total phenolic content was evaluated using the Folin–Ciocalteu assay. The anthelmintic activity was screened on the bovine adult male forms of parasitic nematode Onchocerca ochengi, by the in vitro evaluation of the inhibition of adult worm motility and mortality. Worms were incubated in the presence of different concentrations of the plant extract and effects on survival were monitored after 24 and 48 h. Results: The preliminary phytochemical screening revealed the presence of phenolic compounds, saponins, steroids, tannins, and terpenoids. Bergenin and a mixture of phytosterol, β-sitosterol and stigmasterol were isolated from this extract and were identified by nuclear magnetic resonance, mass spectrometry and by comparison with published data. The crude methanol extract of C. populnea rhizomes showed a strong DPPH antiradical activity with a good amount of total phenolic content((20.69±2.13) g gallic acid equivalent/100 g of extract) and significant anthelmintic activity comparable to the standard drug ivermectin. Bergenin was found to be inactive even after 72 h of incubation. Conclusions: This study constitutes the first report on the anthelmintic activity of this plant and supports the traditional use of C. populnea as a natural antioxidant and anthelmintic. | Jean Noel Nyemb Roland Ndoubalem Emmanuel Talla Alembert Tiabou Tchinda Dieudonne Ndjonka Celine Henoumont Sophie Laurent Joseph Tanyi Mbafor | 2018 | Asian Pacific Journal of Tropical Medicine2018，11，4： | 1 |
| 2 | Vernoguinosterol and vernoguinoside,trypa-nocidal stigmastane derivatives from Vernonia guineensis (Asteraceae)显示文摘 | Alembert T T Apollinaire T Pierre T | 2002 | Phytochemistry2002，59，： | 1 |
| 3 | Stigmastane derivatives and isovalervl guineensis sucrose esters from Vemoniao erivatives guineensis (Asteraceae)显示文摘 | Alembert T Tchindaa Pierre Tanea Johnson F Ayafora | | 0，，： | 1 |
| 4 | Triterpenoid Derivatives from Cylicodiscus gabunensis 显示文摘 | Pierre M Alembert TT Jacques K | 2010 | Chem Pharm Bull2010，58，8： | 1 |
| 5 | 樟脑罗勒生物活性提取物对储藏豇豆和大豆中四纹豆象的影响(英文)显示文摘【目的】本研究旨在评价樟脑罗勒Ocimum canum Sims(唇形科)叶的正己烷、丙酮和甲醇提取物对四纹豆象Callosobruchus maculatus(F.)的杀虫、保护和驱避潜力。【方法】用剂量为1和5 g/kg豆粒的樟脑罗勒提取物包被处理豇豆和大豆豆粒,并以相同剂量的市售苦楝籽油进行包被处理作为参照。7 d内每隔1 d检查处理豆粒中四纹豆象成虫的死亡率。在四纹豆象的各个未成熟期,通过处理新产卵和幼虫,进行杀卵毒性和杀幼虫毒性测试。贮存4个月后评价豆粒受损情况和重量损失。应用线型嗅觉仪,通过选择试验测定驱避效果。【结果】提取物对四纹豆象成虫的毒性与市售苦楝籽油相同,在处理的豇豆中,提取物比市售的苦楝籽油毒性更强。5 g/kg豆粒提取物这一剂量处理7 d内,正己烷、丙酮和甲醇提取物分别引起54.2%±3.9%,62.9%±4.8%和60.3%±4.5%的成虫死亡。此外,与测试的标准杀虫剂相比,提取物激发这两种豆粒产生更强的驱避效果。这一产物对卵的毒性最强,对1和2龄幼虫的毒性比对其他发育阶段豆象的毒性强。正己烷提取物对2龄幼虫的毒性最强(致死率为81.0%±5.3%),而丙酮提取物和甲醇提取物对1龄幼虫的毒性最强,致死率分别为92.5%±7.5%和62.0%±15.7%。丙酮提取物对1和2龄幼虫的毒性与测试的标准杀虫剂相似,对蛹的毒性强于测试的标准杀虫剂。贮存4个月后,豇豆受损和重量损失分别减轻3倍和2倍多。【结论】本研究结果表明,樟脑罗勒提取物对四纹豆象具有潜在的驱避和杀虫活性,由于容易获得,因此强烈建议将该植物用于喀麦隆的害虫治理策略中。 | Daniel KOSINI Elias Nchiwan NUKENINE Clément SAIDOU Alembert Tiabou TCHINDA Gabriel Agbor AGBOR | 2017 | 昆虫学报2017，60，12： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员