Search results for "botany"
showing 10 items of 4586 documents
Chemical Composition of the Essential Oils ofPistacia atlanticaDesf.
2005
The chemical composition of the three essential oils obtained by hydrodistillation of the resin, leaves and fruits of Pistacia atlantica Desf. (Anacardiaceae) was studied by GC and GC/MS. Monoterpene hydrocarbons constituted the main chemical group in the resin oil, with α-pinene (42.9%) and β-pinene (13.2%) as the major components. Oil of the fruits contained high amounts of oxygenated monoterpenes, with bornyl acetate (21.5%) as the major component, while oxygenated monoterpenes and sesquiterpenes were found to predominate in the oil of leaves among which terpinen-4-ol (21.7%) and elemol (20.0%) were the most abundant components.
Phenolic Compounds in Needles of Norway Spruce Trees in Relation to Novel Forest Decline. II. Studies on Trees from Two Sites in Middle Western Germa…
1994
Abstract The content of several phenolic compounds in needles of 20- to 30-year-old Norway spruce trees (Picea abies) was measured using HPLC. The results of two forestry sites in middle western Germany are reported in this paper. They are part of a research programme on novel forest decline which was carried out in various regions of Germany. Distinct amounts of picein, catechin, piceatannol glucoside, and other phenolic compounds were detected in the studied spruce needles. Additionally, their contents changed in relation to damage. Some compounds, especially catechin, showed increased levels in the needles of the damaged trees compared to the undamaged ones. Here, the values for the unda…
Sesquiterpene lactones of Anthemis alpestris
2002
Comparison of the Effects of Indole-3-Acetic Acid and Kinetin on the Photosynthetic Apparatus and on the Cell Metabolism
1984
External and internal factors can exert a regulatory influence on growth and differentiation within a reaction norm determined by the genetic material. As to the internal factors, the phytohormones intervene in the most development processes in a regulatory manner. In a number of publications it was pointed out that there is a far-reaching accordance between the effects caused by I.4A and the effects induced by red light and low light conditions (Zerbe, Wild, 1980 a; Holzapfel et al., 1982 a). Plants of Sinapis alba grown under low light conditions but additionally treated with kinetin show changes in their metabolism that are characteristic of plants grown at higher light intensities (Zerb…
Sesquiterpene lactones of two centaurea species from Sicily
1998
Volatiles ofSideritis mugronensisFlower and Leaf
1991
ABSTRACT The composition of the essential oil obtained from the flowers and the leaves of Sideritis mugronensis in two different stages of their reproductive development is described. The major components of the leaf and flower oils were sabinene: 1.30–10.59% and 2.70–15.21%; 1,8-cineole: 11.60–17.19% and 11.06–28.65%; and α-bisabolol: 5.57–25.49% and 3.40–16.12% respectively.
In vitro biosynthesis of beauvericin and enniatins by Fusarium avenaceum and Fusarium poae strains isolated from Italian durum wheat grains
2015
Modulation of TH1/TH17 equilibrium in vitro by indicaxanthin from Opuntia ficus indica (L. Mill)
2012
Indicaxanthin, Th1
ChemInform Abstract: Giant Crown-Shaped Polytungstate Formed by Self-Assembly of CeIII-Stabilized Dilacunary Keggin Fragments.
2011
Single crystals of Na40K6[Ni(H2O)6]3 [K@K7Ce24Ge12W120O456 (OH)12(H2O)64]· 178H2O are synthesized by addition of KCl to a NaOAc/AcOH buffer solution containing Ce(NO3)3, GeO2, Na2WO4, and NiCl2 followed by slow evaporation at room temperature (24% yield).