期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Protection effect of the anthraquinones, cassiatorin and aurantio-obtusin from seeds of Senna tora against cowpea weevil attack 被引量:1
1
作者 Valentine Chi Mbatchou Rita Akosua Dickson +2 位作者 Isaac Kingsley Amponsah abraham yeboah mensah Solomon Habtemariam 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2018年第2期98-105,共8页
Objetive: To explore the potential insecticidal, ovipositor deterrent and antifeedant effects of ethyl acetate extract of the seeds of Senna tora(Syn. Cassia tora) against cowpea weevil(Callosobruchus maculatus).Metho... Objetive: To explore the potential insecticidal, ovipositor deterrent and antifeedant effects of ethyl acetate extract of the seeds of Senna tora(Syn. Cassia tora) against cowpea weevil(Callosobruchus maculatus).Method: The activities were evaluated using standard protocols.In these bioassays, the cowpea seeds were used directly as an insect feed. The activity of the extract and isolated compounds were tested at concentrations of 100, 200 and 300 μg/mL and compared to neem oil and cinnamaldehyde(as standard positive controls). Phytochemical analysis of the ethyl acetate extract was done through a number of chromatographic techniques and the structures of the isolated compounds were established through comprehensive spectroscopic analysis including 2 D-NMR and ESI-MS studies.Results: Fractionation of the active ethyl acetate extract resulted in the isolation of one known anthraquinone,aurantio-obtusin(1) and a novel compound that was named as cassiatorin(2). Compounds1 and 2 showed comparable insect antifeedant properties with the positive controls while their insecticidal and ovipositor deterrent effects were far superior to the standard controls.Conclusions: It is thus concluded that Senna tora extracts and the isolated compounds(1 and2) may be employed in the postharvest management of stored cowpea seeds and as other crop protectants. 展开更多
关键词 Senna tora Cassia tora Cassiatorin AURANTIO-OBTUSIN Insecticidal Ovipositor deterrent ANTIFEEDANT Cowpea weevil
下载PDF
Pharmacognostic standardisation of Hilleria latifolia(Lam.) H.Walt.(Phytolaccaceae)
2
作者 Isaac Kingsley Amponsah abraham yeboah mensah +2 位作者 Antonia Otoo Merlin Lincoln Kwao mensah Jato Jonathan 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2014年第12期941-946,共6页
Objective:To establish the pharmacognostic characters for the correct identification and quality control of Hilleria latifolia(H.latifolia),an important herb in Ghanaian folklore medicine,for the treatment of infectio... Objective:To establish the pharmacognostic characters for the correct identification and quality control of Hilleria latifolia(H.latifolia),an important herb in Ghanaian folklore medicine,for the treatment of infections,pain and inflammation.Methods:The macro-morphological,qualitative and quantitative microscopic features,physicochemical and phytochemical features of the medicinally used parts of H.latifolia were evaluated using standard methods.Results:The plant has simple,alternate leaves with entire margin.The lamina is ovate to broadly lanceolate with an acuminate apex.It is hypostomatic with anomocytie stomata.The plant contains abundant prismatic crystals in all parts.Starch grains abound in the roots.The quantitative indices of the leaf and physicochemical parameters have also been established.Conclusions:The pharmacognostic features established in this study may be used as part of the pharmacopoeia! standard for the correct identification and quality control of H.latifolia. 展开更多
关键词 Hilleria latifolia Pharmacognostic features STANDARDIZATION Thin layer chromatography chromatogram Quantitative microscopy Fluorescence analysis
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部