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Phytochemical spectrum

Epidemiological studies show an association between low to moderate consumption of red wine and reduced risk for CHD. This phenomenon is known as the French paradox and may be mediated, in part, by the phytochemical resveratrol. The mechanism underlying the cardiomodulatory effects of this polyphenol has not been completely elucidated but may be partly attributable to the broad spectrum of biological responses it elicits. [Pg.146]

E) Leaf spray spectrum acquired from peanut seed in negative-ion mode, showing three fatty acids. (F) Leaf spray spectrum acquired from cranberry fruit in positive ion mode, showing a series of phytochemicals. Assignments given are based on exact mass and/or MS/MS data. Reproduced from Ref. (57). [Pg.244]

Hapepunine (72), occurring in Fvitillavia aamtsahataensis, is the first natural 166-hydroxy-22,26-epiminocholestane derivative encountered (Mitsuhashi et al., Tetrahedron Letters, 1978, 2099). Anrakorinine, from the same source, affords a tosylate which on reduction (LiAlH ) yields hapepunine (72). In its pmr-spectrum it lacks a methyl singlet at 6 0.96 ppm (present in hapepunine), but has an AB quartet (2H) at 3.62 and 3.88 ppm. Consequently it is formulated as 18-hydroxyhapepunine (73) idem, Phytochem., 1981, M, 157). Several indolizidine bases, also related to Solarium Alkaloids, have been encountered in the Fritil-laria group. Camtschatcanidine, for example, from F. aamtsohatoensis, is (74), on the basis of spectral comparison with solanidine on reduction (LiAlHi ) of its 0-tosyl-derivative solanidine (75) is formed (Mitsuhashi et al.. [Pg.414]

Phytochemical studies on Narcissus obesus have resulted in the isolation of a new alkaloid named obesine (420) (see Fig. 24), accompanied by several known Amaryllidaceae alkaloids (74). The stereochemistry and structural determination of the alkaloid 420 have been carried out by spectroscopic analyses and by application of 2D NMR techniques. Although the H-6)8 proton (5 4.38) is masked by the H-3 proton (5 4.30-4.40), the H-6a proton (54.02) was assigned at higher field on the basis of the nuclear Overhauser effect (NOE) with H-12 endo (5 3.10) observed in the 2D NMR experiment. On the other hand, the a disposition of H-3 was confirmed by the NOE between H-3 (5 4.30-4.40) and H-12 exo (5 3.01). In the C-NMR spectrum of 420 a characteristic signal due to the C-11 carbon was observed at 82.7 (singlet) ppm. Also, a comparison of the H and NMR spectra of obesine (420) with those of the related alkaloid 3-epi-marconine (303) (50) was performed. [Pg.411]

Almond is a nutrition-dense food providing a spectrum of macro- and micronutrients. Moreover, it is an excellent source of bioavailable phytochemicals that are believed to possess health promotion potentials. Among these phenolic compounds, including phenolic acids and flavonoids, which are the major antioxidant active substances in almond. Other components such as tocopherols and terpenoids also make contribution to the antioxidant activity of almond. The health benefits of almond have been explored. Almond appears to be effective in reducing the risk of heart disease and cancer prevention, and consumption of ahnond is reconunended by FDA for better health conditions. [Pg.138]

Figure 7 Comparison of on-flow (A) and stop-flow (B) LC/ H-NMR spectra of sweroside (8) in the CH2CI2 extract of Swertia calycina. (C) WET-COSY spectrum (NT 64 x Nl 128) recorded in the stop-flow mode. LC/NMR conditions 60 pi flow cell (3mm i.d.) 500MHz. (Reproduced with permission from Wolfender J-L, Ndjoko K, and Hostettmann K (2001) The potential of LC-NMR in phytochemical analysis. Phytochemical Analysis 12 2-22 John Wiley Sons Ltd.)... Figure 7 Comparison of on-flow (A) and stop-flow (B) LC/ H-NMR spectra of sweroside (8) in the CH2CI2 extract of Swertia calycina. (C) WET-COSY spectrum (NT 64 x Nl 128) recorded in the stop-flow mode. LC/NMR conditions 60 pi flow cell (3mm i.d.) 500MHz. (Reproduced with permission from Wolfender J-L, Ndjoko K, and Hostettmann K (2001) The potential of LC-NMR in phytochemical analysis. Phytochemical Analysis 12 2-22 John Wiley Sons Ltd.)...
The societal claim for a friendly environmental use of pesticides today implicates to promote alternative solutions for a better and relevant using of chemicals. Because they have a broad spectrum of uses, essential oils (EOs) have many industrial applications. They are used now in plant protection and as biocide. They occupy a significant place among insect pest biocontrol agents (BCAs) and represent a consistent part within the market of botanicals used as alternative to chemicals. After phytochemical considerations, this chapter... [Pg.4087]

A wide range of other phytochemicals may have important beneficial effects on human health if consumed in sufficient amount to be efficacious. In many cases, their full spectrum of molecular actions remains to be elucidated. Nevertheless, the following phytochemicals and their main botanical sources are deemed worthy of mention. [Pg.308]


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Phytochemicals

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