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    Wyświetlanie 1-15 z 15
    Tytuł:
    Induction of CMV-1 promoter by 4-hydroxy-2-nonenal in human embryonic kidney cells
    Autorzy:
    Jaganjac, Morana
    Matijevic, Tanja
    Cindric, Marina
    Cipak, Ana
    Mrakovcic, Lidija
    Gubisch, Wolfgang
    Zarkovic, Neven
    Powiązania:
    https://bibliotekanauki.pl/articles/1040401.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    cytomegalovirus
    4-hydroxy-2-nonenal
    oxidative stress
    Opis:
    Oxidative stress, i.e., excessive production of oxygen free radicals and reactive oxygen species, leads to lipid peroxidation and to formation of reactive aldehydes which act as second messengers of free radicals. It has previously been shown that oxidative stress may be involved in the transcriptional regulation of cytomegalovirus (CMV) immediate early promoter, involved in viral reactivation from latency. In the current study we used a plasmid containing the yellow fluorescent protein (YFP) gene under the control of CMV-1 promoter to monitor the influence of hydrogen peroxide and reactive aldehydes, 4-hydroxy-2-nonenal (HNE) and acrolein, on CMV-1 promoter activation in human embryonic kidney cells (HEK293). While acrolein was ineffective, hydrogen peroxide slightly (50 %) stimulated the CMV promoter. In contrast, HNE had a strong, up to 3-fold, enhancing effect on the CMV-1 promoter within four as well as after 24h of treatment. The most effective was the treatment with 24 µM HNE. This effect of HNE suggests that stressful conditions associated with lipid peroxidation could lead to CMV activation.
    Źródło:
    Acta Biochimica Polonica; 2010, 57, 2; 179-183
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of hydroxy-plastochromanol in Arabidopsis leaves
    Autorzy:
    Szymańska, Renata
    Kruk, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/1040435.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    Arabidopsis
    hydroxy-plastochromanol
    plastochromanol
    plastoquinol
    tocopherol
    light stress
    Opis:
    In the present study we have identified hydroxy-plastochromanol in plants for the first time. This compound was found both in low light and high light-grown Arabidopsis plants, however, under high light stress its level was considerably increased. Hydroxy-plastochromanol accumulated also during ageing of leaves of low light-grown plants, similarly as in the case of other prenyllipids. Our results indicate that hydroxy-plastochromanol found in leaves is probably formed as a result of plastochromanol oxidation by singlet oxygen generated in photosystem II during photosynthesis. These data also support the hypothesis that plastochromanol is an efficient antioxidant in vivo, similarly as tocopherols and plastoquinol.
    Źródło:
    Acta Biochimica Polonica; 2010, 57, 1; 105-108
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    POPULATION PHARMACOKINETICS OF 25-HYDROXY VITAMIN D IN NON-ELDERLY POSTMENOPAUSAL WOMEN
    Autorzy:
    DJOKOVIC, JELENA
    Tomic Lucic, Aleksandra
    MILOVANOVIC, OLIVERA
    BAZIC, DANIJELA
    VESELINOVIC, MIRJANA
    DJUKIC, ALEKSANDAR
    MATOVIC, SANDRA
    ZIVKOVIC ZARIC, RADICA
    VELICKOVIC RADOVANOVIC, RADMILA
    JANKOVIC, SLOBODAN
    MILOVANOVIC, JASMINA
    Powiązania:
    https://bibliotekanauki.pl/articles/895436.pdf
    Data publikacji:
    2019-02-28
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    women
    postmenopausal women
    25-hydroxy vitamin D
    Population pharmacokinetics
    NONMEM
    Opis:
    Introduction/aim: The aims of this study were to develop a population pharmacokinetic (PPK) model for the clearance of 25-hydroxy vitamin D in non-elderly postmenopausal women and to identify the factors which have a significant influence on its clearance. Methods: The study population consisted of postmenopausal women who had been referred for evaluation of bone mineral density (BMD) by DEXA (dual-energy x-ray absorptiometry) scanner. The population pharmacokinetics modelling was conducted using the ADVAN 1 subroutine from a non-linear mixed effects (NONMEM) program, and thirty-two covariates were assessed. Results: A total of 75 serum concentrations were obtained from the same number of postmenopausal women and used for PPK analysis. The mean values of the participants’ age was 57.92±3.93 years and their body weight was 69.76±11.49kg. A wide range of 25-hydroxy vitamin D concentrations was observed (from 3.41 to 61.92ng/mL) with a mean value of 26.19±10.95ng/mL. A total of 32 covariates were examined and preliminary results suggested the influence of six covariates on 25-hydroxy vitamin D clearance. In the final PPK model however, only one covariate was shown to have a significant impact on the clearance value – the mean daily dietary intake dose of vitamin D (DD). Conclusions: These findings offer a preliminary basis on which to determine the level of vitamin D supplementation required by individual postmenopausal women. It could prove particularly important in achieving optimal serum levels of vitamin D in this vulnerable population.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 1; 129-136
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of method for extractive spectrophotometric determination of Fe(III) with 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an analytical reagent
    Autorzy:
    Ratnamala, P. S.
    Lokhande, R. S.
    Utkarsha, M. Ch.
    Powiązania:
    https://bibliotekanauki.pl/articles/411571.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Iron Spectrophotometric determination
    ethyl acetate
    2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone
    Opis:
    A spectrophotometric method has been developed for the determination of Fe(III) using 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an extractive reagent. The reagent forms a coloured complex, which has been quantitatively extracted into ethyl acetate at pH 6. The method obeys Beer’s law over arrange from 1 to 7 ppm. The Molar absorptivity and Sandell’s sensitivity were 0.31 × 104 L mol-1cm-1 and 0.13 μg cm-2 respectively. The proposed method is very sensitive and selective. The method has been successfully applied to synthetic and commercial samples.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 9, 1; 7-12
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of method for extractive spectrophotometric determination of Cu(II) with 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an analytical reagent
    Autorzy:
    Ratnamala, P. S.
    Lokhande, R. S.
    Utkarsha, M. Ch.
    Powiązania:
    https://bibliotekanauki.pl/articles/412128.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Copper Spectrophotometric determination
    n-Butanol
    2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazine
    Opis:
    A spectrophotometric method has been developed for the determination of Cu(II) using 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an extractive reagent. The reagent forms a coloured complex, which has been quantitatively extracted into n-butanol at pH 9.2. The method obeys Beer’s law over arrange from 1 to 10 ppm. The Molar absorptivity and Sandell’s sensitivity were 0.97 × 104 L mol-1cm-1 and 0.26 μg•cm-2 respectively. The proposed method is very sensitive and selective. The method has been successfully applied to synthetic and commercial samples.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 9, 1; 1-6
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The applicability of the Migratest® kit for evaluating the chemotactic activity of peripheral blood neutrophils in goats on the example of animals supplemented with β-hydroxy-β-methylbutyrate (HMB)
    Autorzy:
    Wójcik, R.
    Małaczewska, J.
    Kaczorek-Łukowska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087425.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    goats
    Migratest® kit
    chemotactic activity of peripheral blood neutrophils
    β-hydroxy-β-methylbutyrate
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 4; 725-733
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of 5-hydroxytryptamine 1B receptors and 5-hydroxytryptamine uptake inhibition in the cocaine-evoked discriminative stimulus effects in rats
    Autorzy:
    Filip, M.
    Nowak, E.
    Papla, I.
    Przegalinski, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/70612.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Towarzystwo Fizjologiczne
    Tematy:
    discriminative stimulus effect
    dopamine
    5-hydroxy tryptamine 1B receptor
    cocaine
    rodent
    neurotransmission
    rat
    Źródło:
    Journal of Physiology and Pharmacology; 2001, 52, 2
    0867-5910
    Pojawia się w:
    Journal of Physiology and Pharmacology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cu(II), Co(II), Ni(II), Mn(II) and Zn(II) Schiff base complexes of 3-hydroxy-4-[N-(2-hydroxynaphthylidene)-amino]-naphthalene-1-sulfonic acid: Synthesis, Spectroscopic, thermal, and antimicrobial studies
    Autorzy:
    Bakare, Safyah B.
    Powiązania:
    https://bibliotekanauki.pl/articles/778830.pdf
    Data publikacji:
    2019
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Schiff base
    hydroxynaphthalene-1-sulfonic acid
    hydroxy-1-naphthaldehyde
    transition metal ions
    morphology
    antimicrobial activity
    Opis:
    Five divalent transition metals Cu(II), Co(II), Ni(II), Mn(II) and Zn(II) complexes have been synthesized using 3-hydroxy-4-[N-(2-hydroxynaphthylidene)-amino]-naphthalene-1-sulfonic acid (H3L) Schiff base as a ligand derived from the condensation reaction between 4-amino-3-hydroxynaphthalene-1-sulfonic acid and 2-hydroxy-1-naphthalde-hyde. The synthesized complexes were characterized using microanalytical, conductivity, FTIR, electronic, magnetic, ESR, thermal, and SEM studies. The microanalytical values revealed that the metal-to-ligand stoichiometry is 1:1 with molecular formula [M2+(NaL)(H2O)x].nH2O (where x = 3 for all metal ions except of Zn(II) equal x = 1; n = 4, 10, 7, 4, and 6 for Cu(II), Co(II), Ni(II), Mn(II) and Zn(II), respectively). The molar conductivity result indicates that all these complexes are neutral in nature with non-electrolytic behavior. Dependently on the magnetic, electronic, and ESR spectral data, octahedral geometry is proposed for all the complexes except to zinc(II) complex is tetrahedral. Thermal assignments of the synthesized complexes indicates the coordinated and lattice water molecules are present in the complexes. SEM micrographs of the synthesized complexes have a different surface morphologies. The antimicrobial activity data show that metal complexes are more potent than the parent ligand.
    Źródło:
    Polish Journal of Chemical Technology; 2019, 21, 3; 26-34
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cell binding and penetration of quaternized chitosan derivatives
    Autorzy:
    Zubareva, Anastasia A.
    Shagdarova, Balzhima Ts.
    Varlamov, Valery P.
    Svirshchevskaya, Elena V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1034738.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
    Tematy:
    N-[(2-hydroxy-3-trimethylammonium) propyl] chitosan chloride
    cell uptake
    chitosan
    cytotoxicity
    quaternized chitosan
    trypan blue
    Opis:
    Chitosan (Ch) is an attractive biopolymer with multiple reactive groups. However it is poorly soluble at neutral pH. Quaternization improves its solubility and permits the development of various positively charged drug delivery systems. The aim of this work was to study the solubility, toxicity, cell binding, and penetration of 20 kDa chitosan with 9, 40, 58 and 98% of quaternary ammonium group substitution (ChQ1 to ChQ4 accordingly). We showed that ChQ with substitution degree >40% was soluble in a wide pH range. Unexpectedly ChQ2 and ChQ3 were more toxic to cells than Ch, ChQ1 and ChQ4. Higher toxicity of ChQ was found against macrophage like cell line RAW264.7 than against epithelial cells MiaPaCa-2. All ChQ, in contrast to unmodified Ch, easily bound and penetrated the cells with the highest uptake by ChQ4. Thus, quaternized chitosan derivatives can be used for biomedical applications.
    Źródło:
    Progress on Chemistry and Application of Chitin and its Derivatives; 2016, 21; 217-223
    1896-5644
    Pojawia się w:
    Progress on Chemistry and Application of Chitin and its Derivatives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hammett spectral LFER of some antioxidant substituted benzylidene hydrazines
    Autorzy:
    Thirunarayanan, G.
    Manikandan, V.
    Arulkumaran, R.
    Rajarajan, M.
    Sathiyendiran, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182556.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    (E)-(2
    5-dinitrophenyl)-2-(substituted benzylidene)hydrazines
    Hammett correlations
    IR spectra
    NMR spectra
    antioxidant activity
    hydroxy apatite
    Opis:
    About nine (E)-(2,5-dinitrophenyl)-2-(substituted benzylidene)hydrazines have been synthesized by hydroxy apatite catalyzed condensation of 2,4-dinitrophenyl hydrazine and substituted benzaldehydes under microwave irradiation conditions. The obtained yields of these hydrazines are more than 85%. The purities of synthesized hydrazines are examined by the analytical and spectroscopic data reported earlier. The infrared spectral C=N, NH frequencies (v, cm-1) and the NMR spectral chemical shifts of CH, NH protons and carbons are assigned and are correlated with Hammett substituent constants, F and R parameter using single and multi-regression analysis. From the results of statistical analysis the effects of substituent on the group frequencies have been discussed. The antioxidant activities of these synthesized hydrazines were measured using DPPH radical scavenging method. The hydroxy- and methoxy- substituted hydrazines shows significant antioxidant activity.
    Źródło:
    World Scientific News; 2017, 69; 201-219
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of 5-hydroxymethylfurfural (HMF) content in conched chocolate milk masses and selected raw materials used for their production®
    Analiza zawartości 5-hydroksymetylofurfuralu (HMF) w konszowanych czekoladowych masach mlecznych i wybranych surowcach użytych do ich wyprodukowania®
    Autorzy:
    Urbańska, Bogumiła
    Kowalska, Jolanta
    Powiązania:
    https://bibliotekanauki.pl/articles/1522350.pdf
    Data publikacji:
    2021
    Wydawca:
    Wyższa Szkoła Menedżerska w Warszawie
    Tematy:
    5-hydroxy-methylfurfural
    powdered milk
    cocoa beans
    chocolate mass
    chocolate
    5-hydroksymetylofurfural
    mleko w proszku
    ziarna kakaowe
    masa czekoladowa
    czekolada
    Opis:
    The aim of the work presented in the article is to compare the HMF content in chocolate milk mass after the conching process and in selected raw materials used to obtain them. The conching process was carried out under changing conditions of time and temperature. A statistically significant effect of roasting and conching time and temperature on the tested parameter was demonstrated in cocoa beans and chocolate milk masses, respectively.
    Celem pracy przedstawionym w artykule była analiza porównawcza zawartości HMF w czekoladowych masach mlecznych po procesie konszowania oraz w wybranych surowcach wykorzystanych do ich otrzymania. Proces konszowania prowadzono w zmiennych warunkach czasu i temperatury. Wykazano statystycznie istotny wpływ prażenia oraz czasu i temperatury konszowania na badany parametr odpowiednio w ziarnach kakaowych i czekoladowych masach mlecznych.
    Źródło:
    Postępy Techniki Przetwórstwa Spożywczego; 2021, 1; 42-49
    0867-793X
    2719-3691
    Pojawia się w:
    Postępy Techniki Przetwórstwa Spożywczego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical investigations into the Spectrophotometrically Analyzed Niobium (V)-6-Chloro-3-hydroxy-7-methyl-2-(2’-thienyl)-4H-chromen-4-one Complex
    Autorzy:
    Dhonchak, Chetna
    Agnihotri, Nivedita
    Azam, Mohammad
    Javed, Saleem
    Muthu, Sambantham
    Al-Resayes, Saud I.
    Min, Kim
    Powiązania:
    https://bibliotekanauki.pl/articles/27315655.pdf
    Data publikacji:
    2023
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Niobium
    6-Chloro-3-hydroxy-7-methyl-2-(2’-thienyl)-4H-chromen-4-one
    spectrophotometry
    DFT
    density functional theory
    MEP
    molecular electrostatic potential
    Opis:
    Pentavalent niobium cation forms a stable yellow-colored binary complex with 6-chloro-3-hydroxy-7-methyl-2-(2’- thienyl)-4H-chromen-4-one (CHMTC) in the ratio of 1:2. The complex is quantitatively extractable into carbon tetrachloride from HClO4 solution maintained at pH 1.26–1.75 and strictly adheres to Beer’s law as verified by the Ringbom plot with an optimized range of determination as 0.385–1.211 ppm of Nb(V). The ligand-metal complex system shows good precision, accuracy, sensitivity, and selectivity and handles satisfactorily the analysis of several samples of varying complexity. The results are highly reproducible as confirmed by statistical data. The stability of the complex is theoretically confirmed with the help of HOMO-LUMO values and the energy gap [for CHMTC, ΔEgap = 3.62 V and for Nb(V)-CHMTC Complex, ΔEgap = 2.97 eV]. The reactivity descriptors were calculated for detailed computational study to probe into the chemical behavior of the studied ligand and its complex. Further, mapped electrostatic potential diagrams help in justifying the donor sites of CHMTC ligand which is in accordance with the analytical findings.
    Źródło:
    Polish Journal of Chemical Technology; 2023, 25, 3; 63--70
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydroxy functionalized porous polymer particles derived from mixtures of hydrophilic and hydrophobic monomers
    Hydroksyfunkcjonalizowane porowate cząstki polimerowe otrzymane z mieszaniny hydrofilowych i hydrofobowych monomerów
    Autorzy:
    Bukowska, A.
    Bukowski, W.
    Kleczyńska, S.
    Dychtoń, K.
    Drajewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/947283.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    2-hydroxyethyl methacrylate
    hydroxy functionalized porous polymer particles
    suspension polymerization
    w/o emulsion
    metakrylan 2-hydroksyetylu
    hydroksyfunkcjonalizowane porowate cząstki polimerowe
    polimeryzacja suspensyjna
    emulsja w/o
    Opis:
    Porous, hydroxy functionalized, polymer particles, having BET surface areas up to 146 m2/g, were synthesized by suspension polymerization of water in oil (w/o) emulsions. The emulsions were prepared by mixing polyoxyethylene sorbitan monooleate (Tween-80) solutions in water with a mixture of 2-hydroxyethyl methacrylate (HEMA), styrene (S) and divinylbenzene (DVB) dissolved in a mixture of cyclohexanol (CyOH) and octanol (OctOH). The resulting polymer particles were characterized by optical microscopy, scanning electron microscopy, infrared spectroscopy, and thermal gravimetric analysis. Nitrogen adsorption/desorption isotherms and particle size distribution were also determined. The influence of the organic porogen nature and the concentrations of divinylbenzene and Tween-80, the fraction of water in the w/o emulsions and the agitator rotation on the properties of the provided polymer particles were analyzed and discussed.
    Nowe hydroksyfunkcjonalizowane porowate cząstki polimerowe o powierzchni właściwej 146 m2/g syntetyzowano metodą polimeryzacji suspensyjnej emulsji typu woda w oleju w/o. Emulsje otrzymano w wyniku zmieszania wodnych roztworów Tween-80 z mieszaniną metakrylanu 2-hydroksyetylu (HEMA), styrenu (S) i diwinylobenzenu (DVB) rozpuszczoną w mieszaninie cykloheksanolu (CyOH) i oktanolu (OctOH). Otrzymane polimery charakteryzowano metodami mikroskopii optycznej, skaningowej mikroskopii elektronowej, spektroskopii w podczerwieni i analizy termicznej (TGA). Wyznaczono także izotermy adsorpcji/desorpcji oraz rozkład wielkości ziaren uzyskanych na drodze polimeryzacji. Przeanalizowano wpływ natury porogenu, stężenia DVB i Tween-80 na charakterystykę otrzymanych cząstek.
    Źródło:
    Polimery; 2016, 61, 9; 616-625
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    HPLC and ESI-MS analysis of vanillin analogue 2-hydroxy-4-methoxy benzaldehydein swallow root - the influence of habitat heterogeneity on antioxidant potential
    Autorzy:
    Pradeep, M.
    Shetty, N.P.
    Giridhar, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/12298366.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    Decalepis hamiltonii
    endemic plant
    root tuber
    high performance liquid chromatography
    electrospray ionization mass spectrometry
    2-hydroxy-4-methoxybenzaldehyde
    habitat heterogeneity
    antioxidant potential
    phenolic compound
    flavonoids
    vanillin
    isomer
    Opis:
    Decalepis hamiltonii Wight & Arn., is a plant species that is endemic to southern parts of India. The aim of this study is to explore the influence of habitat heterogeneity on total phenolics, flavonoids, flavor compound 2-hydroxy-4-methoxy benzaldehyde (2H4MB) and antioxidant potential of tubers. The flavor metabolite 2H4MB was quantified by HPLC using isocratic solvent system (methanol : acetonitrile : water : acetic acid 47 : 10 : 42 : 1) that indicates obvious difference in 2H4MB content of tubers with a maximum of 96.4 ±2.6 and 92.6 ±1.2 mg 100 g–1 dry weight basis (DW) in samples from B.R. Hills and Mysore area of Karnataka, followed by samples from Tirumalai Hills and Kurnool from Andhra Pradesh (89.02 ±0.9 mg 100 g–1 DW), Tamil Nadu (81.6 ±2.4 mg 100 g–1 DW) and Kerala (80.18 ±1.1 mg 100 g–1 DW) of tubers. There was variation in total phenolics, total flavonoids and 2H4MB content of root samples collected from different habitats. Also significant variation in free radical scavenging potential of methanol root extracts was noticed, which is directly proportional to the phenolics, and flavonoids content. Overall, there was 10–16% difference in content of 2H4MB in D. hamiltonii tubers that were collected from different natural habitats, and this habitat heterogeneity has to be considered vital, while using such tubers for edible purposes and food formulations.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 2; 21-28
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ligninolityczne właściwości izolatów Heterobasidion parviporum w hodowli na drewnie świerka
    Ligninolytic activity of Heterobasidion parviporum isolates in cultivation on Norway spruce wood
    Autorzy:
    Żółciak, A.
    Bohacz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989467.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    fitopatologia lesna
    grzyby
    Heterobasidion parviporum
    izolaty grzybowe
    aktywnosc lignolityczna
    enzymy lignolityczne
    lakaza
    peroksydaza manganozalezna
    peroksydaza ligninowa
    peroksydaza "versatile"
    rozklad drewna
    drewno bielu
    drewno twardzieli
    drewno swierkowe
    biodegradacja
    laccase
    manganese peroxidase
    lignin peroxidase
    versatile peroxidase
    hydroxy−
    methoxyphenols
    sapwood
    heartwood
    norway spruce wood
    Opis:
    The aim of this preliminary study was to assess the activity of laccase, diverse peroxidases as well as the level of micromolecular compounds in Heterobasidion parviporum isolates grown on pieces of Norway spruce wood (sapwood and heartwood) during 50 days of incubation under the laboratory conditions. H. parviporum isolates secreted extracellular enzymes: laccase, manganese peroxidase (MnP), lignin peroxidase (LiP) and versatile peroxidase (VP). Hydroxy− and methoxyphenols were also released during this process. The above−mentioned enzymes showed low activity in mycelium grown on both sapwood and heartwood. The activity of laccase ranged from 0 to 0.513 mU/mg protein on sapwood, and from 0 to 0.106 mU/mg protein – on heartwood. MnP activity of H. parviporum isolates ranged from 0.024 to 0.667 mU/mg protein on sapwood, and from 0.038 to 1.585 mU/mg protein – on heartwood. LiP activity was small and ranged from 0 to 1.281 mU/mg protein on sapwood, and from 0.013 to 0.166 mU/mg protein – on heartwood. Activity of VP oxidizing manganese ions was low. It ranged from 0 to 3.063 mU/mg protein on sapwood, and from 0.059 to 3.054 mU/mg protein – on heartwood. The activity of VP oxidizing guaiacol ranged from 0.006 to 1.490 mU/mg protein on sapwood and from 0.038 to 1.147 mU/mg protein – on heartwood. The hydroxyphenols produced by H. parviporum isolates ranged from 15.037 to 110.149 mg of protocatechuic acid/ml on sapwood, and from 11.236 to 27.220 mg of protocatechuic acid/ml – on heartwood. Methoxyphenols produced by H. parviporum isolates ranged from 3.393 to 24.253 mg of vanillic acid/ml on sapwood, and from 4.955 to 12.005 mg of vanillic acid/ml – on heartwood.
    Źródło:
    Sylwan; 2016, 160, 12; 1027-1035
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-15 z 15

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