Baits were used to investigate the toxicity of methanol extracts from the fern Pronephrium megacuspe (Thelypteridaceae) on workers of the red imported fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae). The methanol extract of P. megacuspe had toxic effects on workers. With macrergates, the LC50 values of the methanol extract and ethyl acetate fraction were 524.0 and 145.9 μg/g, respe...

BACKGROUND Maytenus royleanus is traditionally used in gastro-intestinal disorders. The aim of this study was to evaluate the methanol extract of leaves and its derived fractions for various antioxidant assays and for its potential against lipid peroxidation and hemolytic activity. METHODS Various parameters including scavenging of free-radicals (DPPH, ABTS, hydroxyl and superoxide radical), ...

Actaea spicata Linn. (Ranunculaceae) has been traditionally used for the treatment of various ailments such as rheumatism, inflammation, nerve diseases, lumbago, scrofula and chorea, but no systematic phytochemical and pharmacological work has ever been carried out on this potential plant. Preliminary phytochemical screening showed presence of phenols and flavonoids in A. spicata. Thus, the pre...

BACKGROUND One of the acquired biological hallmarks of tumor multistep development is the resistance of cancer cells to apoptosis; therefore, induction of apoptosis is an important therapeutic approach. Hypericum species are spread throughout the world and have been investigated for their biological properties. OBJECTIVES Our previous studies had demonstrated cytotoxicity of Hypericum scabrum...

persea americana is a plant used by traditional medicine practitioners to treat ailments including diarrhoea and diabetes mellitus in nigeria. hence, the chloroform and the methanol fractions of the chloroform-methanol extract of the leaves of p. americana were evaluated for their acute toxicity as well as anti-diarrhoeal effects in wistar rats to substantiate this claim. the chloroform and met...

objectives: belonging to papaveraceae family, glaucium vitellinum is one of the persian endemic plants which has not been investigated biologically. the present paper focused on the assessment of the antibacterial and antifungal activities of the total methanol extract and alkaloid sub-fraction of the flowering aerial parts of g. vitellinum. materials and methods: the antibacterial and antifung...

Artemisinin extracted from Artemisia annua L. is the best medicine with the highest efficiency, the most effective and the lowest toxicity in treating ague nowadays. At present, most studies focus on artemisinin and its derivatives, while the study and report about the other active components are rare. This paper purposed to further discover new indication of Artemisia annua L. connecting with ...

The metabolic pathways associated with the tricarboxylic acid cycle intermediates of Pichia pastoris were studied using biosynthetically directed fractional 13C labelling. Cells were grown aerobically in a chemostat culture fed at two dilution rates (1.39x10(-5) s-1 and 4.44x10(-5) s-1) with varying mixtures of glycerol and methanol as sole carbon sources. The results show that, with co-assimil...

A lipid fraction was obtained by extraction with chloroform-methanol (1:1 .v/v) of "the S-precipitate"prepared from whole human saliva by one precipitation.This fraction produced leukocytosis, but not hypocalcemia , in rabbits upon intravenous injection. Saliva-parotin-A purified from the S-precipitate possessed both hypocalcemic and leukocytosis-promoting activities, which remained unaffected ...

Rooibos tea was extracted with boiling water. The aqueous extract was chromatographed in a Diaion HP20 column eluted stepwise with water, 25%, 50% and 75% (v/v) aqueous methanol, and 100% methanol. The water eluate (fraction A) showed an augmenting effect on anti-ovalbumin (anti-OVA) immunoglobulin M (IgM) production in OVA-stimulated murine splenocytes in vitro. Fraction A also showed a strong...