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    Wyświetlanie 1-7 z 7
    Tytuł:
    Floral scent compounds and emission patterns of three Styrax species
    Autorzy:
    Chen, C.
    Cao, Y.
    Chen, H.
    Ni, M.
    Yu, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078258.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Styrax species
    volatile compounds
    terpenes
    SPME-GC/MS
    Opis:
    Styrax is a gorgeous species combined with high medicinal and ornamental values, however, in- formation about its floral scents is limited. This study aimed to reveal the floral scent compounds and the dynamic changes in the flowering process of Styrax japonicus, S. grandiflora and S. calvescens. Static headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry was adopted in the pres- ent study. The results showed that 24, 22 and 22 volatile compounds were present at three flowering stages, among which linalool, ocimene, α-pinene and germacrene D dominated in different species. Terpenes were the main floral scent compounds in all species, whereas there was considerable relative content of ketones in S. japonicus. Among the major terpenes, α-pinene, ocimene and myrcene were the common volatiles in these species, while β-elemene and allo-ocimene were the specific volatiles in S. japonicus and S. calvescens, respec- tively. The highest content of terpenes occurred at initial flowering stage in three species. The differences in the type and content of principal compounds contributed to the fragrance diversity among these species. A solid foundation for understanding the complexity of volatile emission could be obtained from our findings, meanwhile, effective utilization of abundant terpenes in flowers of Styrax species should be applied.
    Źródło:
    Dendrobiology; 2021, 85; 30-38
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Composition of volatile in micropropagated and field grown aromatic plants from Tuscany Islands
    Autorzy:
    Pistelli, Laura
    Noccioli, Cecilia
    D'Angiolillo, Francesca
    Pistelli, Luisa
    Powiązania:
    https://bibliotekanauki.pl/articles/1039604.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    in vitro shoot cultures
    VOC
    GC-MS
    HS-SPME
    aromatic plants
    biodiversity
    Opis:
    Aromatic plant species present in the natural Park of Tuscany Archipelago are used as flavoring agents and spices, as dietary supplements and in cosmetics and aromatherapy. The plants are usually collected from wild stands, inducing a depletion of the natural habitat. Therefore, micropropagation of these aromatic plants can play a role in the protection of the natural ecosystem, can guarantee a massive sustainable production and can provide standardized plant materials for diverse economical purposes. The aim of this study is to compare the volatile organic compounds produced by the wild plants with those from in vitro plantlets using headspace solid phase micro-extraction (HS-SPME) followed by capillary gas-chromatography coupled to mass spectrometry (GC-MS). Typical plants of this natural area selected for this work were Calamintha nepeta L., Crithmum maritimum L., Lavandula angustifolia L., Myrtus communis L., Rosmarinus officinalis L., Salvia officinalis L. and Satureja hortensis L. Different explants were used: microcuttings with vegetative apical parts, axillary buds and internodes. Sterilization percentage, multiplication rate and shoot length, as well as root formation were measured. The volatile aromatic profiles produced from in vitro plantlets were compared with those of the wild plants, in particular for C. maritimum, R. officinalis, S. officinalis and S. hortensis. This study indicated that the micropropagation technique can represent a valid alternative to produce massive and sterile plant material characterised by the same aromatic flavour as in the wild grown plants.
    Źródło:
    Acta Biochimica Polonica; 2013, 60, 1; 43-50
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In vitro production of M. × piperita not containing pulegone and menthofuran
    Autorzy:
    Bertoli, Alessandra
    Leonardi, Michele
    Krzyzanowska, Justyna
    Oleszek, Wieslaw
    Pistelli, Luisa
    Powiązania:
    https://bibliotekanauki.pl/articles/1039723.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    essential oil
    M. x piperita
    GC-MS
    SPME
    callus
    in vitro plantlets
    Opis:
    The essential oils (EOs) and static headspaces (HSs) of in vitro plantlets and callus of Mentha x piperita were characterized by GC-MS analysis. Leaves were used as explants to induce in vitro plant material. The EO yields of the in vitro biomass were much lower (0.1% v/w) than those of the parent plants (2% v/w). Many typical mint volatiles were emitted by the in vitro production, but the callus and in vitro plantelet EOs were characterized by the lack of both pulegone and menthofuran. This was an important difference between in vitro and in vivo plant material as huge amounts of pulegone and menthofuran may jeopardise the safety of mint essential oil. Regarding the other characteristic volatiles, menthone was present in reduced amounts (2%) in the in vitro plantlets and was not detected in the callus, even if it represented the main constituent of the stem and leaf EOs obtained from the cultivated mint (26% leaves; 33% stems). The M. piperita callus was characterized by menthol (9%) and menthone (2%), while the in vitro plantlet EO showed lower amounts of both these compounds in favour of piperitenone oxide (45%). Therefore, the established callus and in vitro plantlets showed peculiar aromatic profiles characterized by the lack of pulegone and menthofuran which have to be monitored in the mint oil for their toxicity.
    Źródło:
    Acta Biochimica Polonica; 2012, 59, 3; 417-423
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the Addition of Extractives on The Reduction Of Vocs Emissions from Lacquers in the liquid state
    Autorzy:
    Brózdowski, Jakub
    Gajewski, Erik
    Szczepaniak, Oskar M.
    Stachowiak-Wencek, Agata
    Powiązania:
    https://bibliotekanauki.pl/articles/27323538.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
    Tematy:
    VOC
    phenolic compounds
    Prunus serotina
    lacquer
    GC/MS
    SPME
    reduction of VOC emissions
    Opis:
    The aim of this study was to determine the effect of the addition of extractive substances on the VOC emission of lacquer products in the liquid state. Three water-soluble acrylic resin products were investigated using the stationary phase microextraction technique in combination with gas chromatography coupled with mass spectrometry (SPME-GC/MS). The extraction of volatile compounds was analysed at three temperatures: 22 ℃, 35 ℃ and 45 ℃. 20 μg of an extract obtained from the leaves, branches and bark of black cherry (Prunus serotina Erhr.) were added to commercial products. Flavonoids accounted for almost 75% of the total phenols in the used extract. The spectrum of volatile compounds emitted by the liquid coating products selected for the studies was examined before and after adding the extract to them. It was found that the addition of black cherry extract caused a significant reduction in the emissions of volatile compounds emitted by the researched products. The compounds, whose amounts did not decrease under the influence of the addition of the extract, were esters of propenoic acid. The applied extract was a source of emissions from an additional compound: benzaldehyde. The total VOC emissions of the investigated liquid coating products was reduced by 8-55% and depended on the extraction temperature. The paper also proposes the mechanism of chemical reactions between phenolics and VOC, which may cause the reduction in VOC emissions from lacquer products. The IBM RXN tool was utilised to find possible reactions.
    Źródło:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2023, 66, 211; Art. no. 1644-3985.437.04
    1644-3985
    Pojawia się w:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Untargeted Metabolomics Analysis Reveals the Effect of Fixation on the Profile of Volatile Compounds of Cyclocarya paliurus Tea
    Autorzy:
    Bai, Minge
    Wang, Liling
    Powiązania:
    https://bibliotekanauki.pl/articles/48899273.pdf
    Data publikacji:
    2024-08-23
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    fixation technology
    HS-SPME-GC-MS
    key aroma compounds
    OPLS-DA
    volatile metabolites
    Opis:
    Fixation is a necessary tea processing step that affects the quality of tea, including its aroma. However, there are no guidelines to follow whether the Cyclocarya paliurus leaves need to be fixated to produce tea. The aim of this study was to determine the volatile metabolites in fixated and unfixated C. paliurus tea by gas chromatography-mass spectrometry in order to identify the volatile compounds that differentiate them and establish the key aroma compounds. Compared with the unfixated tea, the fixated tea had higher contents of amines, phenols, nitrogen compounds, ether, alcohol, terpenoids, ester and aromatics. A total of 147 metabolites that differentiated both types of teas were identified using principal component analysis (PCA) and orthogonal partial least squares discriminant analysis (OPLS-DA). Among them, 22 and 25 volatile compounds of teas processed without and with fixation, respectively, had relative odor activity values greater than 1. These metabolites had green, fruity, sweet, woody, herbal, floral, fresh, spicy, earthy and waxy odor. This study showed that fixation technology improved the quality of C. paliurus tea, which provided the basis for the production of C. paliurus tea, and promoted the standardization of the preparation technology of C. paliurus tea.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2024, 74, 3; 232-243
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of volatile compounds from a brewery with SPME technique
    Identyfikacja lotnych związków z browaru za pomocą techniki SPME
    Autorzy:
    Piotrowicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/106393.pdf
    Data publikacji:
    2016
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    volatile compounds
    brewery wort
    SPME
    headspace
    GC-MS
    lotne związki
    brzeczka piwna
    faza nadpowierzchniowa
    Opis:
    The paper presents results of the analysis of the volatile compounds arising from the production processes in a brewery. The investigated material comprised the unhoped brewer’s wort which was taken from the fermentation tanks during the industrial process. The identification of volatile compounds was conducted with the use of Solid-Phase MicroExtraction (SPME) technique by extracting the compounds from the headspace of the brewer’s wort (HS-SPME). The procedure was optimized by modifying the parameters potentially influencing the process efficiency. The analytes adsorbed on the fibers were subsequently placed in the injector of a gas chromatograph, where they were released in the course of thermal desorption. Three types of fibers were chosen for the experiments: 65 μm PDMS/DVB, 50/30 μm DVB/CAR/PDMS and 100 μm PDMS. The greatest number of peaks corresponding to compounds found in the examined material was observed on the 50/30 μm DVB/CAR/PDMS fiber while the lowest was identified on the 100 μm PDMS fiber. The detected compounds are mainly the derivatives of aliphatic, alicyclic and aromatic hydrocarbons with different functional groups e.g. carbonyl, aldehyde or ester and possessing O-heteroatom in their structure.
    W pracy przedstawiono wyniki analizy lotnych związków powstających w trakcie procesów produkcyjnych w browarze. Materiałem pobieranym do badań była brzeczka przednia (niechmielona) otrzymywana po procesie filtracji w kadzi filtracyjnej. Identyfikacji lotnych składników dokonano z wykorzystaniem techniki mikroekstrakcji do fazy stacjonarnej (SPME), ekstrahując związki z fazy nadpowierzchniowej brzeczki piwnej. Procedurę optymalizowano, modyfikując parametry potencjalnie wpływające na efektywność procesu. Zaadsorbowane na włóknie anality umieszczano następnie w dozowniku chromatografu gazowego, gdzie w wyniku termicznej desorpcji następowało ich uwalnianie. Do badań wytypowano trzy rodzaje włókien: 65 mm PDMS/DVB, 50/30 mm DVB/CAR/PDMS oraz 100 mm PDMS. Największą ilość związków zidentyfikowano na podstawie analizy włókna o bipolarnej fazie stacjonarnej 50/30 mm DVB/CAR/PDMS, natomiast najmniejszą przy użyciu włókna 100 mm PDMS. Zidentyfikowano w sumie kilkadziesiąt związków będących pochodnymi węglowodorów alifatycznych, alicyklicznych i aromatycznych, posiadających różne grupy funkcyjne, takie jak karbonylowa, aldehydowa, estrowa, oraz zawierających w swej strukturze heteroatom tlenu.
    Źródło:
    Chemistry-Didactics-Ecology-Metrology; 2016, 21, 1-2; 97-106
    2084-4506
    Pojawia się w:
    Chemistry-Didactics-Ecology-Metrology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Batch high-pressure supercritical fluid extraction of essential oil from black cumin seeds
    Wysokociśnieniowa wsadowa ekstrakcja nadkrytyczna olejku lotnego z nasion czarnuszki siewnej
    Autorzy:
    Gurgenova, K.
    Wawrzyniak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2071899.pdf
    Data publikacji:
    2012
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    ekstrakcja ciało stałe-ciecz
    HS-SPME
    Nigella sativa L.
    olejek eteryczny
    p-cymen
    tymochinon
    solid-liquid extraction
    essential oil
    p-cymene
    thymoquinone
    Opis:
    High-pressure batch extraction was applied for separation of essential oils from seeds. Experiments were performed with supercritical carbon dioxide at 45°C and 55°C and in pressure range from 200 to 500 bars. Volatile essential oil of extracts were analyzed by headspace solid-phase microextraction coupled with gas chromatography - mass spectrometry. The extract composition showed high amount of volatiles.
    Wysokociśnieniowa wsadowa ekstrakcja została zastosowana do odzysku olejków eterycznych z nasion. Nadkrytyczny dwutlenek węgła został zastosowany jako rozpuszczalnik, w zakresie ciśnień od 200 do 500 bar w temperaturze 45 i 55°C. Mikroekstrakcja do fazy stałej z fazy nadpowierzchnio- wej została wykonana w połączeniu z chromatografią gazowa dla przeprowadzenia analizy wyodrębnionych frakcja lotnych. Większości składników lotnych oleju z ekstraktu zostało zidentyfikowano.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2012, 6; 322-323
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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