Plumeria rubra (Apocynaceae) is frequently used in folk medicine for the treatment of gastrointestinal disorders, hepatitis, and tracheitis, among other infirmities. The aim of this study was to investigate the gastroprotective potential of a protein fraction isolated from the latex of Plumeria rubra (PrLP) against ethanol-induced gastric lesions and describe the underlying mechanisms. In a dos...

Pityriasis rubra pilaris is an uncommon inflammatory dermatosis that is well recognized across the globe. Erythroderma is a common presentation. A precise diagnosis of pityriasis rubra pilaris is based on morphologic features and is classified into 6 types: classic adult onset (type I), atypical adult (type II), classic juvenile (type III), circumscribed juvenile (type IV), atypical juvenile (t...

Seed and seedling predation may differentially affect competitively superior tree species to increase the relative recruitment success of poor competitors and contribute to the coexistence of tree species. We examined the effect of seed and seedling predation on the seedling recruitment of three tree species, Acer rubrum (red maple), Liriodendron tulipifera (yellow poplar), and Quercus rubra (n...

Cell-mediated cytotoxicity against syngeneic MC104 fibrosarcoma cells was detected in C57BL/6N mice 7 days after tumor inoculation in the hind foot. This cytotoxicity was undetectable by Day 14 in the Winn test using spleen and draining popliteal lymph node (DPLN) cells. Similar results were obtained with the 51Cr release assay following in vitro activation of these lymphoid cells with mitomyci...

The first investigation of the chemical constituents and bioactivities of Diospyros rubra Lec. is reported. D. rubra extracts were screened for antimicrobial, antimalarial and cytotoxic activities. They were only shown to be active antimalarials. The extracts with good antimalarial activity were isolated and extensively purified to give lupeol (1), lupenone (2), betulin (3), lupeol acetate (4),...

At a debate of the Dermatological Society of London, November 9th, 1898, on general exfoliative dermatitis or pityriasis rubra, Dr. Walter G. Smith1 said that in regard to nomenclature, etymology is a fallible guide in medical terminology, and he did not think it mattered much whether we choose to call it exfoliative dermatitis or pityriasis rubra, except that it would be well we should all agr...

To evaluate the potential abortifacient activity of the aqueous, alcohol, ethyl acetate and chloroform extracts of P. rubra pod in female albino rats 50, 100 and 200 mg/kg body weight doses of each extract were administered from day 11 to 15 of pregnancy and animals were allowed to go full-term. The phytochemical screening revealed the presence of alkaloids, flavonoids, simple phenolics, steroi...

Many leaves survive the severing of their major veins in apparently excellent health. According to the classical explanation, the leaf minor veins provide "conductive overload," an excess of parallel conductive paths, rendering the major veins hydraulically dispensable. Whether such an excess of conductive paths exists has important implications for vascular design and for leaf response to vasc...