Phytochemical and chemotaxonomic study on Ficus tsiangii Merr. ex Corner

Wang, Yanliang; Liang, Hong; Zhang, Qingying; Cheng, Wei; Yi, Sirong

doi:10.1016/j.bse.2014.08.003

Cited by 12 publications

(7 citation statements)

References 41 publications

(31 reference statements)

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“…Among them, eryodictiol and naringenin have been previously reported in other Ficus species. 40,41 It should be mentioned that the glycosylated avanones were reported here for the rst time in the Moraceae family. For example, eriodictyol di-hexoside (m/z 611.1624, RT 16.09 min) was characterized according to its fragmentation pattern, which agrees with the ndings of Iswaldi et al 42 for eriodictyol 5,3 0 -di-O-glucoside in Aspalathus linearis (Fabaceae).…”

Section: Qualitative Proling Of Leaves and Fruitsmentioning

confidence: 68%

“…47,48 Finally, using the analytical method 1, the avanol (+)-catechin, which was conrmed with the standard, and the avanonol dihydroquercetin were also detected, in accordance with previous studies on the Ficus species. 10,13,33,40,41 Using analytical method 2, two anthocyanins could be detected in dried g fruits at 520 nm (see Fig. 2e and f).…”

Section: Qualitative Proling Of Leaves and Fruitsmentioning

confidence: 99%

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New insights into the qualitative phenolic profile of Ficus carica L. fruits and leaves from Tunisia using ultra-high-performance liquid chromatography coupled to quadrupole-time-of-flight mass spectrometry and their antioxidant activity

Ammar¹,

Contreras

Belguith-Hadrich

et al. 2015

RSC Adv.

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Section: Qualitative Proling Of Leaves and Fruitsmentioning

confidence: 68%

Section: Qualitative Proling Of Leaves and Fruitsmentioning

confidence: 99%

New insights into the qualitative phenolic profile of Ficus carica L. fruits and leaves from Tunisia using ultra-high-performance liquid chromatography coupled to quadrupole-time-of-flight mass spectrometry and their antioxidant activity

Ammar¹,

Contreras

Belguith-Hadrich

et al. 2015

RSC Adv.

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“…Found in 280 plants, coumarins such as umbelliferone (5) and nodakenetin (13) have been researched because of their positive pharmacological properties (Venugopala et al, 2013). The absorption spectrum for nodakenetin has not been reported, however, the molecule has previously been detected in plant tissues (Lee et al, 2003;Wang et al, 2014), and is a Nitroaromatics are a strongly-absorbing class of BrC chromophores that are formed from the reaction of aromatics with NO x 295 in plumes (Harrison et al, 2005). This class of compounds is represented in Table 1 with nitropyrogallol (2), nitrocatechol (6), hydroxynitroguaiacol (7), and methyl nitrocatechol (10).…”

Section: Brc Chromophoresmentioning

confidence: 99%

Molecular composition and photochemical lifetimes of brown carbon chromophores in biomass burning organic aerosol

Fleming¹,

Roberts²,

Selimovic³

et al. 2019

Preprint

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<p><strong>Abstract.</strong> To better understand the effects of wildfires on air quality and climate, it is important to assess the occurrence of chromophoric compounds in smoke and characterize their optical properties. This study explores the molecular composition of light-absorbing organic aerosol, or brown carbon (BrC), sampled at the Missoula Fire Sciences laboratory as a part of the FIREX Fall 2016 lab intensive. Twelve biomass fuels from different plant types were tested, including gymnosperm (coniferous) and angiosperm (flowering) plants, and different ecosystem components such as duff, litter, and canopy. Emitted particles were collected onto Teflon filters and analyzed offline using high performance liquid chromatography/ photodiode array/high resolution mass spectrometry (HPLC/PDA/HRMS). Separated BrC chromophores were classified by their retention times, absorption spectra, integrated PDA absorbance in the near-UV and visible spectral range (300&#8211;700&#8201;nm), and chemical formulas from the accurate m/z measurements. BrC chromophores were grouped into the following classes and subclasses: lignin-derived, which includes lignin pyrolysis products; distillation products, which include coumarins and flavonoids; nitroaromatics; and polycyclic aromatic hydrocarbons (PAHs). The observed classes/subclasses were common across most fuel types, although specific BrC chromophores varied based on plant type (gymnosperm or angiosperm) and ecosystem component(s) burned. To study the stability of the observed BrC compounds with respect to photodegradation, biomass burning organic aerosol (BBOA) particle samples were irradiated directly on filters with near UV (300&#8211;400&#8201;nm) radiation, followed by extraction and the HPLC/PDA/HRMS analysis. Lifetimes of individual BrC chromophores depended on the fuel type and the corresponding combustion conditions, but lignin-derived and flavonoid classes of BrC generally had the longest lifetimes with respect to UV photodegradation. Moreover, lifetimes for the same type of BrC chromophores varied depending on biomass fuel and combustion conditions. While individual BrC chromophores disappeared on a timescale of several days, the overall light absorption by the sample persisted longer, presumably because the photolysis processes converted one set of chromophores into another without complete photobleaching, or from undetected BrC chromophores that photobleached more slowly. To model the effect of BrC on climate, it is important to understand the change in the absorption coefficient with time. We measured the equivalent atmospheric lifetimes of the overall BrC absorption coefficient which ranged from 10 to 41 days, with subalpine fir having the shortest lifetime, and conifer canopies having the longest. BrC emitted from biomass fuel loads encompassing multiple ecosystem components (litter, shrub, canopy) had absorption lifetimes on the lower end of the range. These results indicate that photobleaching by atmospheric photolysis is relatively slow. Other chemical aging mechanisms, such as heterogeneous oxidation by OH, may be more important for BrC degradation than photolysis for predicting the decay of BBOA BrC absorption in models.<p>

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“…Forests have naturally occurring wildfire cycles that maintain the forest ecosystem, but global climate change is altering the cycles with unpredictable consequences (Shvidenko and Schepaschenko, 2013;Weber and Stocks, 1998). In addition to the impacts of wildfires on ecosystems, biomass burning plumes have pronounced effects on atmospheric chemistry and climate (Boulanger et al, 2014;Moriondo et al, 2006;Shvidenko and Schepaschenko, 2013;Wotton et al, 2010;Wotton and Flannigan, 1993).…”

Section: Introductionmentioning

confidence: 99%

Molecular composition and photochemical lifetimes of brown carbon chromophores in biomass burning organic aerosol

et al. 2020

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Abstract. To better understand the effects of wildfires on air quality and climate, it is important to assess the occurrence of chromophoric compounds in smoke and characterize their optical properties. This study explores the molecular composition of light-absorbing organic aerosol, or brown carbon (BrC), sampled at the Missoula Fire Sciences laboratory as a part of the FIREX Fall 2016 lab intensive. A total of 12 biomass fuels from different plant types were tested, including gymnosperm (coniferous) and angiosperm (flowering) plants and different ecosystem components such as duff, litter, and canopy. Emitted biomass burning organic aerosol (BBOA) particles were collected onto Teflon filters and analyzed offline using high-performance liquid chromatography coupled to a photodiode array spectrophotometer and a high-resolution mass spectrometer (HPLC–PDA–HRMS). Separated BrC chromophores were classified by their retention times, absorption spectra, integrated absorbance in the near-UV and visible spectral range (300–700 nm), and chemical formulas from the accurate m∕z measurements. BrC chromophores were grouped into the following classes and subclasses: lignin-derived products, which include lignin pyrolysis products; distillation products, which include coumarins and flavonoids; nitroaromatics; and polycyclic aromatic hydrocarbons (PAHs). The observed classes and subclasses were common across most fuel types, although specific BrC chromophores varied based on plant type (gymnosperm or angiosperm) and ecosystem component(s) burned. To study the stability of the observed BrC compounds with respect to photodegradation, BBOA particle samples were irradiated directly on filters with near UV (300–400 nm) radiation, followed by extraction and HPLC–PDA–HRMS analysis. Lifetimes of individual BrC chromophores depended on the fuel type and the corresponding combustion condition. Lignin-derived and flavonoid classes of BrC generally had the longest lifetimes with respect to UV photodegradation. Moreover, lifetimes for the same type of BrC chromophores varied depending on biomass fuel and combustion conditions. While individual BrC chromophores disappeared on a timescale of several days, the overall light absorption by the sample persisted longer, presumably because the condensed-phase photochemical processes converted one set of chromophores into another without complete photobleaching or from undetected BrC chromophores that photobleached more slowly. To model the effect of BrC on climate, it is important to understand the change in the overall absorption coefficient with time. We measured the equivalent atmospheric lifetimes of the overall BrC absorption coefficient, which ranged from 10 to 41 d, with subalpine fir having the shortest lifetime and conifer canopies, i.e., juniper, having the longest lifetime. BrC emitted from biomass fuel loads encompassing multiple ecosystem components (litter, shrub, canopy) had absorption lifetimes on the lower end of the range. These results indicate that photobleaching of BBOA by condensed-phase photochemistry is relatively slow. Competing chemical aging mechanisms, such as heterogeneous oxidation by OH, may be more important for controlling the rate of BrC photobleaching in BBOA.

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Phytochemical and chemotaxonomic study on Ficus tsiangii Merr. ex Corner

Cited by 12 publications

References 41 publications

New insights into the qualitative phenolic profile of Ficus carica L. fruits and leaves from Tunisia using ultra-high-performance liquid chromatography coupled to quadrupole-time-of-flight mass spectrometry and their antioxidant activity

New insights into the qualitative phenolic profile of Ficus carica L. fruits and leaves from Tunisia using ultra-high-performance liquid chromatography coupled to quadrupole-time-of-flight mass spectrometry and their antioxidant activity

Molecular composition and photochemical lifetimes of brown carbon chromophores in biomass burning organic aerosol

Molecular composition and photochemical lifetimes of brown carbon chromophores in biomass burning organic aerosol

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