A sangra-d’água (Croton urucurana Baill.) é uma árvore de difícil propagação por sementes. Objetivou-se avaliar o efeito da época coleta estacas e diferentes concentrações ácido indolbutírico (IBA), no enraizamento Croton Baill. As coletas foram realizadas em novembro/2017, fevereiro/2018, maio/2018 agosto/2018. tiveram suas bases imersas solução hidroalcoólica (50 v/v) IBA, nas zero, 500, 1.00...

This article conta ined descriptions of five new taxa of Mexican Euphorbiaceae. Euphorbia (sub g. Agaloma) na yarensis is endemic to pine-oak woodland in the mount ains of central Nayarit. It appears related to E. so ob yi but differs by possessing linear to linear-ovate leaves. Croton varelae is also endemic to central Nayarit. A key was provided to distinguish this spec ies. a member of sect....

to determine the neuropharmacological activity of the leaf extract of croton zambesicus in mice and chicks. the effect of aqueous leaf extract of croton zambesicus on thiopental sodium – induced sleeping time in mice, on gross locomotor activity (gla) in 2-day old chicks and effect of extract on apomorphine - induced stereotyped behavior in chicks were evaluated. the aqueous extract (1000 and 1...

Tumors have been induced frequently in the laboratory mouse following exposure to the carcinogenic hydrocarbons (6). In many of these studies, the chemicals were applied continuously and at a relatively high concentration. Cramer and Stowell (5) compared the tumorigenic effectiveness of e0-methylcholanthrene when applied continuously or discontinuously to the skin of mice and concluded that ski...

A single topical application of 1.0 mg of croton oil or 17 nmoles of 12-O-tetradecanoyl-phorbol-13-acetate (TPA) resulted in a rapid, transient stimulation of mouse epider mal ornithinc decarhoxylase activity. The activity reached a peak (230-fold greater than control after TPA) at 4 to 5 hr after croton oil or TPA treatment and returned to control level by 12 hr. The stimulation of S-adenosyl-...

Cancer is the leading cause of morbidity and mortality all over the world in spite of the advances made in its management. In this study, we investigated the in vivo anti-tumorigenic potential of the venom obtained from a medically important scorpion species Leiurus quinquestriatus on chemically induced skin cancer in mice. Animals were divided into five groups, with 13 animals in each group. A...

Tumors have been induced frequently in the laboratory mouse following exposure to the carcinogenic hydrocarbons (6). In many of these studies, the chemicals were applied continuously and at a relatively high concentration. Cramer and Stowell (5) compared the tumorigenic effectiveness of e0-methylcholanthrene when applied continuously or discontinuously to the skin of mice and concluded that ski...

Because of the possibility of cocarcinogenic effects of sub stances to which many people are exposed, the mechanism of action of one such agent was examined in 2-stage tumor induc tion experiments. The appearance of new tumors was studied at the end of a series of croton oil treatments, or between treatments given at long intervals in mouse epidermis given a single pretreatment with a carcinoge...

The anti-inflammatory effects of an ethanol extract of Angelica gigas (EAG) were investigated in vitro and in vivo using croton oil-induced inflammation models. Croton oil (20 microg/mL) up-regulated mRNA expression of cyclooxygenase (COX)-I and COX-II in the macrophage cell line, RAW 264.7, resulting in the release of high concentrations of prostaglandin E(2) (PGE(2)). EAG (1 approximately 10 ...

The antibacterial activities of three Croton species were compared using bioautography and the serial microdilution methods. The methanolic extracts of all the species had low activity against Escherichia coli. The highest activity was observed with Croton megalobotrys against Enterococcus faecalis with a minimal inhibitory concentration (MIC) value of 0.02 mg/ml. Croton steenkapianus extracts ...