Bal Krishan Kapahi

ESSENTIAL OIL OF FOUR HIMALAYAN NEPETA SPECIES

Abstract The chemical compositions of four Nepeta species collected from the Himalayan region of India have been determined for the first time by using a combination of GC, GC/MS and spectroscopic techniques. The oil of N. floccosa was found to be rich in neral (33.1%) and geranial (32.4%), N. govaniana oil contained 4aα, 7α, 7aα-nepetalactone (25.9%), germacrene D (20.5%) and β-elemene (17.5%) and N. discolor oil contained α-pinene (18.5%), β-pinene (12.6%), myrcene (10.7%) and linalyl acetate (12.3%). The oil of N. royleana was found to be rich in 1,8-cineole (75%)

Chemical Composition of Rose Water Volatiles

Abstract A volatile concentrate obtained from rose water (ex. Rosa damascena flowers) by liquid-liquid extraction with dichloromethane was studied by GC and GC/MS. The volatiles consisted mainly of 2-phenylethanol (69.7–81.6%), linalool (1.5–3.3%), citronellol (1.8–7.2%), nerol (0.2–4.2%), geraniol (0.9–7.0%) along with rose oxides and all other characteristic minor rose compounds.

A High Yielding Citral-Rich Strain of Ocimum americanum L. from India

ABSTRACT A new variety of Ocimum americanum L. rich in citral, has been developed by natural selection and raised for two successive sowing seasons to examine the seasonal variations in herb yield and oil content, chemical variation and citral content. The new strain was selected because it was a short duration crop (100 days) for the production of a citral-rich oil. Analysis of the oil using GC, 1H-NMR, 13C-NMR and MS revealed that the oil contained a total citral content of 76% (neral 23.0%, geranial 51.5%).

Variability in the Essential Oil of Angelica glauca Edgew of Different Geographical Regions

Abstract The chemical composition of Angelica glauca Edqew (Fam. Apiaceae) root volatile, from various locations in Alpine Himalayas at different phenological stages of plant growth was investigated by using GC, GC/MS and spectroscopic techniques. Terpene hydrocarbons (methyl octene, limonene, β-phellendrene, β-pinene), phthalides [(Z)-3-butyli-dene phthalide (Z)- and (E)-ligustilide] and citronellyl acetate showed large quantitative variations from flowering to dormancy stage and as well from different geographical locations.

The Leaf Essential Oil of Juniperus recurva Buch.-Ham. ex D. Don from India and Nepal Compared with J. recurva var. squamata (D. Don) Parl.

Abstract The composition of the leaf oils of Juniperus recurva from India (Sikkim) and Nepal were analyzed and compared to the composition of J. recurva var. squamata from western India. The major components of J. recurva oil were α-pinene (0.5–6.9%), sabinene (0.4–13.4%), δ-3-carene (13.6–23.7%), limonene (0.2–18.4%), terpinen-4-ol (0.2–3.7%), γ-cadinene (0.4–3.9%), δ-cadiene (0.8–10.2%), elemol (3.9–5.1%), cubenol (0-3.7%), epi-α-cadinol (0.3–5.5%), epi-α-muurolol (0.5–5.5%), α-cadinol (0.8–13.1%) and 4-epi-abietal (trace-3.75%)

Essential Oil Constituents of Himalayan Dracocephalum speciosum Benth

Abstract The chemical composition of the essential oil from the aerial parts of Dracocephalum speciosum Benth. growing wild in Alpine Himalayas was investigated by GC, GC/MS, 1H- and 13C-NMR spectroscopy. The oil was totally new and different from the oils of other Dracocephalum species. The major constituents were identified as cis- and trans- pinocarvyl acetate (5.7% and 60.5%, respectively).