Composition of the essential oil of Ocimum canum grown in Rwanda

Abstract

The essential oil from leaves and flowers of Ocimum canum Sims, growing wild in Rwanda, was investigated by LSC, GLC and GC-MS. All samples were characterized by a high content of linalool (60-90%). Neither camphor nor citral and methyl cinnamate, compounds reported to be characteristic for different types of O. canum, could be detected. All monoterpene hydrocarbons were present in minor amounts (less than 1.5%). The oil samples with the lowest linalool content consisted of relatively large amounts of sesquiterpene hydrocarbons such as bergamotene (about 10%) and beta-caryophyllene (about 5%). Oct-1-en-3-ol and 3-octanol were the only oxygen-containing components, besides linalool, that amounted to more than 1% in most of the oil samples.

Essential Oil Chemotypes of Three Ocimum Species Found in Sierra Leone and Nigeria

“…In this respect, both the Sierra Leone and Nigeria O. americanum L. leaf materials were thus identified as the linalool chemotype, constituting 49.1% and 39.6% respectively, in the present study. This chemotype of O. americanum L. is consistent with those previously reported in Benin [14], Rwanda [15], Cameroon [6] and Brazil [16]. The high content of linalool in some varieties of O.…”

Anesthetic activity of plant essential oils on <i>Cyprinus carpio</i> (koi carp)

“…OCO was previously reported to have different major compounds such as camphor (37,38), 1,8-cineole (39), citral (40), eugenol (41), geraniol (32), and linalool (42). However, in the present study, E-citral (41.01%) and Z-citral (37.04%) were found at the highest level in this EO.…”

Avaliação da atividade antibacteriana de folhas de Myrtus communis L. (Myrtaceae)

“…Essas composições naturais se tornaram um conveniente atrativo devido às suas propriedades biológicas e organolépticas. Entre as espécies reconhecidas como produtoras de óleo essencial anti-séptico destacam-se o Ocimum gratissimum L., conhecido popularmente como alfavacão (Ntezurubanza et al, 1987), o Cymbopogon citratus (DC) Stapf ou capim-limão (Onawunmi & Ogunlana, 1986) Podemos notar para o óleo essencial e extrato etanólico de M. communis que os níveis de inibição de crescimento bacteriano pela técnica de difusão em disco foram menores em relação aos controles de ampicilina exibidos na Tabela 1. Entretanto, os dados indicam que a atividade antibacteriana para o óleo essencial e extrato hidroalcoólico de M. communis frente a algumas linhagens, foi melhor evidenciada pela técnica "template".…”