Natural Products Extracts: Terpenes and Phenolics

Gutiérrez-Lomelí, Melesio; Del‐Toro‐Sánchez, Carmen Lizette; Rodríguez-Sahagún, Araceli; Castellanos-Hernández, Osvaldo A.

doi:10.2174/978160805114411201010021

Cited by 2 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…65 Terpenoids are organic compound that found in all tissues of higher plants and terpenoids are widely use for colourant and fragrance in food industry, raw materials of resin manufacturer and printing ink manufacturer. [66][67] About steroids, which are used widely used in pharmaceutical to antiinflammatory, anti-cancer, antioxidants and contraception. [68][69] Alpinia extract was found alkaloids in n-hexane and ethanolic extracts, while flavonoids, tannin and polyphenol were found in ethanolic extracts only.…”

Section: Phytochemical Screeningmentioning

confidence: 99%

Phytochemicals, Antioxidants and Anti-tyrosinase Analyses of Selected Ginger Plants

Rachkeeree¹,

Kantadoung²,

Puangpradub³

et al. 2020

View full text Add to dashboard Cite

Background: Some of Zingeberaceae are not widely used for medicine of food, although in Thailand have been used them for many reasons about health or the diet. This study evalued the phytochemicals and anti-tyrosinase activities of 16 plant species of Alpinia, Amomum, Curcuma, Etlingera and Kaemferia (Zingiberaceae). Methods: The extractions of dried powdered rhizomes were performed using n-hexane, ethylacetate and ethanol. Percentage extract yield of the samples varied among species and solvent extracts. Chemical groups (alkaloids, flavonoids, tannins, polyphenols, steroids and terpenoids) were identified using phytochemical screening. The total phenolic contents (TPC) were analyzed using the Folin-Ciocalteu's reagent, while antioxidant activities were detected using 2,2-diphenyl-1picrylhydrazyl (DPPH) and the 2,2'-azino-bis (3-ethylbenzothizoline-6-sulphonic acid) (ABTS .+ ). The anti-tyrosinase was expressed to the half maximal inhibitory concentration (IC 50 ) value (mg/mL). Results: The ethyl acetate extract of Amomum showed the highest value of TPC. The strongest antioxidant activity were found in Amomum and Kaemferia extracts, while ethyl acetate and ethanol extracts of all samples have a better antioxidant properties than the n-hexane extracts. On the other hand, the n-hexane extracts have the highest anti-tyrosinase potential in all samples and of these, Curcuma extracts were the best group. Conclusion: Our research indicated that plants of the Zingiberaceae would be new sources of antioxidants and anti-tyrosinase for further natural product developments in cosmetics, food or nutraceuticals.

show abstract

Section: Phytochemical Screeningmentioning

confidence: 99%

Phytochemicals, Antioxidants and Anti-tyrosinase Analyses of Selected Ginger Plants

Rachkeeree¹,

Kantadoung²,

Puangpradub³

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The composition of the fuel combustion products derives from the composition of the biomass fuels (Lobert & Warnatz, 1993 ). Organic compounds in plants fall into three categories: (a) primary metabolites, (b) structural high MWt polymers, and (c) secondary metabolites (Gutiérrez‐Lomelí et al., 2012 ). Primary metabolites are responsible for the metabolism of the plant and the reproduction of its cells (e.g., nucleic acids, the common amino acids, and sugars).…”

Section: Discussionmentioning

confidence: 99%

“…The structural polymers include cellulose, lignin, and proteins. The secondary metabolites are produced by the plant to interact with its environment and can be specifically produced to respond to biotic and abiotic stressors (Gutiérrez‐Lomelí et al., 2012 ), hence, they are variable within the plant. There are tens of thousands of secondary metabolites that fall into six major groups: (a) polyketides and fatty acids, (b) terpenoids (C 5 H 8 ) n , and steroids, (c) phenylpropanoids (phenolic acid compounds), (d) alkaloids, (e) specialized amino acids and peptides, and (f) specialized carbohydrates (Gutiérrez‐Lomelí et al., 2012 , and references therein).…”

Section: Discussionmentioning

confidence: 99%

Beyond the Ångström Exponent: Probing Additional Information in Spectral Curvature and Variability of In Situ Aerosol Hyperspectral (0.3–0.7 μm) Optical Properties

et al. 2022

View full text Add to dashboard Cite

Ångström exponents (α) allow reconstruction of aerosol optical spectra over a broad range of wavelengths from measurements at two or more wavelengths. Hyperspectral measurements of atmospheric aerosols provide opportunities to probe measured spectra for information inaccessible from only a few wavelengths. Four sets of hyperspectral in situ aerosol optical coefficients (aerosol‐phase total extinction, σext, and absorption, σabs; liquid‐phase soluble absorption from methanol, σMeOH‐abs, and water, σDI‐abs, extracts) were measured from biomass burning aerosols (BBAs). Hyperspectral single scattering albedo (ω), calculated from σext and σabs, provide spectral resolution over a wide spectral range rare for this optical parameter. Observed spectral shifts between σabs and σMeOH‐abs/σDI‐abs argue in favor of measuring σabs rather than reconstructing it from liquid extracts. Logarithmically transformed spectra exhibited curvature better fit by second‐order polynomials than linear α. Mapping second order fit coefficients (a1, a2) revealed samples from a given fire tended to cluster together, that is, aerosol spectra from a given fire were similar to each other and somewhat distinct from others. Separation in (a1, a2) space for spectra with the same α suggest additional information in second‐order parameterization absent from the linear fit. Spectral features found in the fit residuals indicate more information in the measured spectra than captured by the fits. Above‐detection σMeOH‐abs at 0.7 μm suggests assuming all absorption at long visible wavelengths is BC to partition absorption between BC and brown carbon (BrC) overestimates BC and underestimates BrC across the spectral range. Hyperspectral measurements may eventually discriminate BBA among fires in different ecosystems under variable conditions.

show abstract

Natural Products Extracts: Terpenes and Phenolics

Cited by 2 publications

References 0 publications

Phytochemicals, Antioxidants and Anti-tyrosinase Analyses of Selected Ginger Plants

Phytochemicals, Antioxidants and Anti-tyrosinase Analyses of Selected Ginger Plants

Beyond the Ångström Exponent: Probing Additional Information in Spectral Curvature and Variability of In Situ Aerosol Hyperspectral (0.3–0.7 μm) Optical Properties

Contact Info

Product

Resources

About