The antimicrobial activity of different extracts of Piper regnellii was evaluated through the broth microdilution assay. The leaves, roots and stems extracts presented a good activity against Staphylococcus aureus and Bacillus subtilis with minimal inhibitory concentration (MIC) between 31.25 62.5 μg/ml. Although the differences were not significant, the leaves hydroalcoholic extract tended to ...

Lignans are a large class of natural products that have been isolated from many plants. They reveal diverse biological activities, especially antiviral and antitumor properties. From Piper cubeba, lignans of several classes can be isolated from the roots, rhizomes, stems, leaves, seeds, and fruits. Among its various chemical constituents, (-)-cubebin and (-)-hinokinin are found in significant q...

but we occasionall}7 come across cases where the victims have contracted the habit from the very beginning. We do not know how the people of Calcutta have derived their knowledge of the intoxicating property of a costly drug which has hitherto been only handled by medical men, but facts collected tend to show that they have got it from their Bhagalpore brethren where cocaine has become a social...

OBJECTIVE The study was conducted to investigate the antibacterial and anthelmintic activities and to determine total phenolic contents of methanolic extract of Piper betel leaves. MATERIALS AND METHODS The extract was subjected to assay for antibacterial activity using both gram positive and gram negative bacterial strains through disc diffusion method; anthelmintic activity with the determi...

This paper summarizes a series of field experiments that investigated the effects of organic and inorganic nutrients on sweet potato tuber yield in the humid lowlands of Papua New Guinea. In the first experiment, plots were planted with Piper aduncum, Gliricidia sepium and Imperata cylindrica, which were slashed after one year, whereafter sweet potato was planted. Sweet potato yield was lowest ...

A dihydropyridone alkaloid, cenocladamide, and a derivative of piplartine, 4'-desmethylpiplartine were isolated along with piplartine from the leaves of Piper cenocladum. The structures of the new compounds were determined by spectroscopic methods and by comparison to piplartine. Concentrations of these amides in plants with and without ant mutualists, are compared.

The links among better financial reporting, better markets, and better economy and society are arguable, but they remain poorly understood. The addition of IFRS to the set of available alternatives may improve these linkages, but granting them monopoly status does not. Claims that the universal adoption of IFRS as a single set of high-quality principles-based standards will yield global compara...

Kenneth Grahame’s masterpiece, The wind in the willows, contains a classic description of a religious experience as Ratty and Mole come face-to-face with the Piper at the Gates of Dawn. This chapter draws on Happold’s identification of seven characteristics of mystical experience, as amplified by the Francis-Louden Mystical Orientation Scale, to test whether Ratty and Mole’s experience can be p...

The study was undertaken to assess the dosage-mortality ratio and toxic effects of Piper guineense fruit extracts on the adults of Biomphalaria pfeifferi, the snail intermediate host of Schistosoma mansoni, which causes intestinal schistosomiasis. The result showed significant toxic effects with crude ethanol and hot water fruits extracts. The estimated lethal dose concentration by arithmetic m...