Chemotaxonomic Characterization and Antimicrobial and Cytotoxic Activities of the Leaf Essential Oil of Grown in Southern Nigeria.

Unlabelled: (turmeric) has been used in Chinese traditional medicine and Ayurvedic medicine for many years.

Methods: The leaf essential oil of from southern Nigeria was obtained by hydrodistillation and analyzed by gas chromatography-mass spectrometry (GC-MS). The essential oil was screened for antibacterial, antifungal, and cytotoxic activities.

Isolation of aurantiamides from gomphrena celosioides C. Mart.

In West Africa and Nigeria in particular, many virgin plants are still waiting to be evaluated for their medicinal importance. Claims of plants with folk medicinal applications need to be evaluated and verified. Gomphrena celosioides (family - Amaranthaceae) is a weed grown in lawns and the biological activity of the extract had earlier been established.

Assessment of organochlorine pesticides residues in higher plants from oil exploration areas of Niger Delta, Nigeria.

The concentrations and distributions of organochlorine pesticides (OCPs) in some higher plant samples collected from oil exploration areas of the Niger Delta, Nigeria were examined. The concentrations of Σ(25)OCP ranged from 82 to 424, 44 to 200 , 34 to 358, 33 to 106 and 16 to 75 ng/g in Olomoro, Oginni, Uzere, Irri and Calabar plants, respectively. The compositional profiles of the analysed OCPs in most of the plants showed no fresh inputs in the area.

Chemical composition, toxicity and larvicidal activity of the essential oil from the whole plant of Acalypha segetalis from south-west Nigeria.

The chemical composition of the essential oil from the whole plant of Acalypha segetalis Muell. Arg. was analyzed by GC and GC/MS.

Essential oil composition, antibacterial activity and toxicity of the leaves of Tetrapleura tetraptera (Schum. & Thonn.) taubert from Nigeria.

The composition of the essential oil of the leaves of Tetrapleura tetraptera (Schum. & Thonn.) Taubert.

Antibacterial diterpenoids from Jatropha podagrica Hook.

Japodagrin (1) and japodagrone (2), two macrocylic diterpenoids possessing lathyrane and jatrophane skeletons, respectively, have been isolated from the root of Jatropha podagrica Hook. Four other diterpenoids (3-6) were also isolated from this plant. The structures of these compounds were elucidated on the basis of NMR and HRMS analysis, and by spectral comparisons.

epi-Cubebanes from Solidago canadensis.

GC-MS of the essential oil prepared by hydrodistillation of the green parts of a specimen of Solidago canadensis collected near Katowice, Poland, revealed two new sesquiterpene hydrocarbons. Their EI mass spectra resembled the mass spectrum of beta-ylangene (1) but the retention indices of the new compounds differed markedly from this known compound. After isolation of the new compounds by preparative GC their investigation by one- and two-dimensional NMR techniques resulted in the identification of 6-epi-alpha-cubebene (2) (minor constituent, 1.