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    Wyświetlanie 1-9 z 9
    Tytuł:
    Treatment of vinasse liquid from sugarcane industry using electro-coagulation/flocculation followed by ultra filtration
    Autorzy:
    Karchiyappan, Thirugnanasambandham
    Delcolle, Roberta D.
    Goncalves, Gustavo L.
    Vareschini, Daniel T.
    Gimenes, Marcelino L.
    Powiązania:
    https://bibliotekanauki.pl/articles/779924.pdf
    Data publikacji:
    2019
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Vinasse
    Sugar industry
    Electro coagulation
    FT-IR analysis
    Ultrafiltration
    Zero Discharge
    Opis:
    In this present work, vinasse, a by-product of sugarcane industry, was examined using combined treatment methods to purify it. Electrocoagulation/flocculation, ultrafiltration were applied as pre-treatment and post-treatment, respectively. The effectiveness of combined process was evaluated based on colour, turbidity and chemical oxygen demand (COD) removal. The efficiency of electrochemical reactor was investigated according to process variables such as retention time, electrode distance and electrolyte dose. From the results, the price to treat unit vinasse is found to be 2.5 US$/m3 under optimum conditions. FT-IR analysis of sludge obtained shows the results of electro-coagulation process. Ultrafiltration as post treatment experiments showed the enhanced removal efficiency of colour (91%), turbidity (88%) and COD (85%). The results showed that electrocoagulation followed by ultrafiltration is a suitable combined technique to reduce the colour, turbidity and COD from vinasse liquid.
    Źródło:
    Polish Journal of Chemical Technology; 2019, 21, 4; 40-47
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of phytochemical constituents of Methanol extract of Moringa oleifera Lam. whole leaf by Gas Chromatography-Mass Spectrometry and Fourier transform infrared spectroscopy analysis
    Autorzy:
    Okechukwu, Victor Uchechukwu
    Eze, Sunday Onyekwere
    Omokpariola, Daniel Omeodisemi
    Okereke, Janefrancess Chinemerem
    Powiązania:
    https://bibliotekanauki.pl/articles/1031420.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    FT-IR analysis
    GC-MS analysis
    Moringa oleifera
    methanol extract
    phytochemical constituents
    Opis:
    The research study evaluated the phytochemical constituents of Methanol extracts of Moringa oleifera whole leaf by Gas Chromatography-Mass Spectrometry (GC-MS) and Fourier transform infrared spectroscopy (FT/IR) analysis. The leaves was washed, air dried for 2 weeks, then ground into a fine powder and extracted using methanol by maceration for 24 hours using standard procedures. After the contact time elapsed, the solvent filtered to recover the extract. The functional groups and the chemical constituents of the methanol extract of Moringa oleifera leaves investigated using Fourier transform infrared spectroscopy (FT/IR) and Gas Chromatography-Mass Spectrometry (GC-MS) respectively. The FT/IR analysis confirmed the presence of O-H, C=C, C-H, C-O, CH3 and C=C-H bond stretching functional groups, which indicates that the substance is an aliphatic alcohol, ester, aldehyde and carboxylic acid. However, the fingerprint region had a pattern that is specific for every molecule, the presence of -OH function and N-O stretch; suggest that or alcohols and nitrogen or aromatic or aliphatic phenols containing molecules are major components of the Moringa oleifera leaf studied. GC-MS analysis of the extract reveals the identification of twenty compounds, in which two compounds were identified in each peak. N,N'-Pentamethylenebis[s-3-aminopropyl thiosulfuric acid and 2-Myristynoyl pantetheine (100%), 2-Myristynoyl pantetheine and Deoxyspergualin (92.05%), 5-Octadecenal and 9-Hexadecenoic acid (27.94%). N,N'-Pentamethylenebis[s-3-aminopropyl thiosulfuric acid and Pentetic Acid are the major phytoconstituents. Most of the compounds in the list are bioactive and possess medicinal properties, which further justify the application of Moringa oleifera traditional plant in the discovery of novel therapeutics.
    Źródło:
    World News of Natural Sciences; 2021, 37; 18-30
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physicochemical Investigations of Hydrogels Containing Gold Nanoparticles Designed for Biomedical Use
    Autorzy:
    Głąb, Magdalena
    Kudłacik-Kramarczyk, Sonia
    Drabczyk, Anna
    Grabowska, Beata
    Tyliszczak, Bożena
    Powiązania:
    https://bibliotekanauki.pl/articles/2056025.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    acrylic hydrogels
    gold nanoparticles
    sorption properties
    incubation studies
    FT-IR analysis
    hydrożele akrylowe
    nanocząstki złota
    właściwości sorpcyjne
    badania inkubacyjne
    analiza FT-IR
    Opis:
    Currently, many investigations are being performed to develop dressing materials with a positive effect on the wound healing process. In general, innovative dressings should ensure wound exudate absorption, constitute an external barrier limiting the possibility of wound contamination and, importantly, also provide therapeutic properties. This work is focused on obtaining materials with potential use as dressings for treatment of difficult-to-heal wounds. The synthesis methodology of acrylic hydrogels modified with selected modifiers, i.e. arabic gum, nanogold, bee pollen and chamomile extract, was developed. Next, the sorption properties of the materials were determined as well as their behavior during the incubation in fluids imitating the environment of the human body. Additionally, the impact of such an incubation on their structure was evaluated by FT-IR spectroscopy. It was proved that the modifiers affected the sorption properties of hydrogels, i.e. samples with additives showed even approx. 2.5-fold lower swelling ability. In turn, incubation of hydrogels in simulated body fluids did not cause any rapid changes in pH, which may indicate the biocompatibility of the tested materials with the tested fluids. Thus, it may be concluded that the developed materials show great application potential for biomedical purposes and may be subjected to more advanced studies such as cytotoxicity assessments towards selected cell lines.
    Źródło:
    Journal of Casting & Materials Engineering; 2021, 5, 2; 20--30
    2543-9901
    Pojawia się w:
    Journal of Casting & Materials Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    FT-IR, FT-Raman, NMR and U-V Spectral investigation: Computation of vibrational frequency, chemical shifts and electronic structure calculations of 1-bromo-4-nitrobenzene
    Autorzy:
    Shakila, G.
    Saleem, H.
    Sundaraganesan, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178760.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    DFT
    FT-IR
    FT-Raman
    HOMO-LUMO and MEP
    NMR
    UV analysis
    Opis:
    The FT-IR and FT-Raman spectra of 1-bromo-4-nitrobenzene (1B4NB) have been recorded in the range 400-4000 cm-1 and 100-4000 cm-1 respectively. Also the NMR and UV-VIS spectra of 1B4NB have been recorded and analyzed. The molecular structures, fundamental vibrational frequencies and intensity of the vibrational bands are investigated and interpreted theoretically with the use of structure optimizations and normal coordinate force field calculations based on density functional theory (DFT) with basis sets 6-31+G(d,p) and 6-311++G(d,p). The vibrational wave number assignments were made from potential energy distribution (PED) calculations using Veda program. The simulated vibrational spectra of the molecule show excellent agreement with the experimental spectra. The hyper conjugative interaction energy (E)2 and electron densities of donor (i) and acceptor (j) bonds were calculated using NBO analysis. The energy gap of the molecule was found using HOMO and LUMO calculation. The electronic transition was studied using UV-Visible analysis of the title molecule with B3LYP/6-311++G (d,p) level of basis set. The microscopic Non-linear optical behavior, the molecular electrostatic potential (MEP), chemical descriptors and thermo dynamical properties of the title compound were also calculated. In addition, the 1H and 13C NMR chemical shifts values of 1B4NB in the ground state for B3LYP/ 6-311++G (d,p) basis set were also calculated using Gauge independent atomic orbital (GIAO) method.
    Źródło:
    World Scientific News; 2017, 61, 2; 150-185
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gas chromatography mass spectrum and Fourier transform - infrared spectroscopy analysis of methanolic extract of Cressa cretica L. leaves
    Autorzy:
    Omran, Aseel Muhammed
    Abu-seraj, Nidaa Adnan
    Al Husaini, Ibtihal Muiz
    Powiązania:
    https://bibliotekanauki.pl/articles/1182951.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ft-ir
    gc-ms analysis
    leaves
    methanol
    cressa cretica
    Opis:
    Aims of this study were to investigation the presence of phytochemical compounds in the methanolic extract of Cressa cretica L. leaves by using GC-MS method and report the functional groups by using FT-IR spectroscopy. The identification of phytochemical compounds based on the peak area, retention time, molecular weight, molecular formula, MS fragment ions. Thirty four phytochemical compounds were identification in the methanolic extract of Cressa cretica leaves. The GC-MS analysis provide the existence of 5-Methyl-6-phenyltetrahydro-1,3-oxazine-2-thione, Lactose, 3-Deoxy-L-ribose-2,5-dibenzoate, Sarreroside, Pterin-6-carboxylic acid, Octadecadiynoic acid, methyl ester, d-Mannose, Dodecanoic acid, 3-hydroxy-, Geranyl isovalerate, Tetradecanoic acid , 6-epi-shyobunol, Paromomycin, Cis-9-Hexadecenoic acid, and others. The FT-IR analysis revealed the presence of Alkenes, aliphatic amines, nitro compounds, alkanes. These are chemical compounds are may be useful for various herbal formulation as antifungal, antibacterial, anti- inflammatory, anti-oxidant and others.
    Źródło:
    World Scientific News; 2016, 49, 2; 381-404
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie przenośnego spektrometru FT-IR do określania półilościowego składu mineralogicznego skał zbiornikowych
    The use of portable FT-IR spectrometer for semi-quantitative analysis of mineralogical composition of reservoir rocks
    Autorzy:
    Orzechowski, M.
    Zagórska, U.
    Hryniewicka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1835444.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Nafty i Gazu - Państwowy Instytut Badawczy
    Tematy:
    FTIR
    XRF
    XRD
    analiza półilościowa
    skład mineralogiczny
    FT-IR
    semi-quantitative analysis
    mineralogical composition
    Opis:
    Analiza półilościowa składu mineralogicznego skał przy pomocy przenośnego spektrometru FT-IR jest metodą szybką i może stanowić ciekawą alternatywę dla innych metod analitycznych, takich jak XRD i XRF. Modele stworzone za pomocą algorytmu Beera będące podstawą do opracowania metodyki do analizy półilościowej dają bardzo dobre rezultaty, charakteryzując się wysokim współczynnikiem determinacji R2 dla widm podczerwonych oraz metod XRD i XRF. Przenośny spektrometr FT-IR może być z powodzeniem użyty zarówno w pomiarach laboratoryjnych, jak i terenowych. Metoda FT-IR może umożliwić szybką ocenę litologiczną przewiercanych warstw oraz jest pomocna przy wyborze prób do dalszych badań laboratoryjnych. W niniejszym artykule przedstawiono wstępne wyniki analizy półilościowej składu mineralogicznego skał zbiornikowych opartej na korelacji widm FTIR z wynikami analiz XRF i XRD.
    Semi-quantitative analysis of mineralogical composition of reservoir rocks with the use of portable FT-IR spectrometer is a quick analytical method and might be an interesting alternative to other methods such as XRD and XRF. Models created using Beer’s algorithm being the basis of methodology for semi-quantitative analysis, have given very good results with a high R2 determination coefficient, for infrared spectra and methods such as XRD and XRF. Portable FT-IR spectrometer can be successfully used for laboratory analyses as well as field measurements. The opportunity to analyze the mineralogical composition of rocks allows for quick lithological assessment of drilled layers and helps during sampling for further laboratory testing. This article shows preliminary results of semi-quantitative analyses of mineralogical composition of reservoir rocks based on correlations of infrared spectra with XRF and XRD results.
    Źródło:
    Nafta-Gaz; 2017, 73, 5; 295-301
    0867-8871
    Pojawia się w:
    Nafta-Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ promieniowania UV-VIS na właściwości termomechaniczne i strukturę barwionej folii PLA
    Effect of UV-VIS radiation on the thermomechanical properties and structure of dyed PLA film
    Autorzy:
    Stepczyńska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/947508.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    polilaktyd
    promieniowanie UV-VIS
    fotodegradacja
    mechaniczna analiza dynamiczna (DMA)
    spektroskopia w podczerwieni (FT-IR)
    polylactide
    UV-VIS radiation
    photodegradation
    dynamic mechanical analysis (DMA)
    infrared spectroscopy (FT-IR)
    Opis:
    Badano wybrane właściwości folii polilaktydowej (PLA) z dodatkiem barwnika poddanej działaniu promieniowania UV-VIS. Właściwości mechaniczne folii określono metodą mechanicznej analizy dynamicznej (DMA). Zaobserwowano, zależne od temperatury, zmiany wartości modułu zachowawczego (E'), modułu stratności (E”) oraz współczynnika tłumienia (tan d) folii po napromienianiu. Strukturę cząsteczkową badanych folii przed i po procesie fotostarzenia oceniano na podstawie widm spektroskopii w podczerwieni z transformacją Fouriera (FT-IR). Trwałość wybarwienia próbek badano za pomocą spektrofotometru sferycznego.
    The changes in the selected properties of coloured polylactide (PLA) film subjected to UV-VIS irradiation were investigated. The mechanical properties of the examined film samples were determined by dynamic mechanical analysis (DMA). Temperature-dependent changes in the values of storage modulus (E'), loss modulus (E”) and damping coefficient (tan d) of the film after irradiation were observed. The molecular structure of the coloured film before and after photoageing was evaluated by Fourier Transform Infrared Spectroscopy (FT-IR). The colour fastness of the samples was tested using spherical spectrophotometer.
    Źródło:
    Polimery; 2015, 60, 6; 385-390
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and spectral Hammett correlation analysis of some (E)-3-(5-bromothiophen-2-yl)-1-phenylprop-2-en-1-one compounds
    Autorzy:
    Christuraj, P.
    Rajakumar, P. R.
    Geetha, C.
    Vanangamudi, G.
    Arulkumran, R.
    Manikandan, V.
    Sundararajan, R.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1179576.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    (E)-3-(5-bromothiophen-2-yl)-1-phenylprop-2-en-1-ones
    FT-IR and NMR spectra
    Hammett correlation analysis
    Substituent constants
    Substituent effects
    UV
    Opis:
    A series of substituted of (E)-3-(5-bromothiophen-2-yl)-1-phenylprop-2-en-1-one compounds by cross-aldol condensation reaction of 5-bromothiophene-2-carbaldehyde with various substituted acetaldehyde in the presence sodium hydroxide (base). The synthesized substituted (E)-3-(5-bromothiophen-2-yl)-1-phenylprop-2-en-1-one compounds was characterized by physical constants, UV, FT-IR, 1H & 13C-NMR spectral data. The group frequencies of infrared ʋ(cm-1) of CO s-cis and s-trans, CH in-plane and out of plane, CH=CH out of plane, >C=C< out of plane modes, NMR chemical shifts δ (ppm) of Hα, Hβ, CO, Cα and Cβ of these chalcones were correlated with Hammett substituent constants, F and R parameters using single and multi-regression analyses.
    Źródło:
    World Scientific News; 2017, 74; 15-35
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and effects of substituent on (E)-styryl-3-methyl-2-thienyl chalcones
    Autorzy:
    Christuraj, P.
    Geetha, C.
    Vanangamudi, G.
    Arulkumaran, R.
    Manikandan, V.
    Rajakumar, P. R.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1161056.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    (E)-3-(3-methylthiophen-2-yl)-1-phenylprop-2-en-1-ones
    FT-IR & NMR spectra
    Fly-ash:H3PO4 nanocatalyst
    Hammett correlation analysis
    Substituent effects
    UV
    solvent-free synthesis
    Opis:
    Series of eleven substituted of (E)-3-(3-methylthiophen-2-yl)-1-phenylprop-2-en-1-ones compounds by cross-aldol condensation reaction of 3-methylthiophene-2-carbaldehyde with various substituted acetaldehyde in the occurrence of Fly-Ash: H3PO4 catalyst. The effect of catalytic activity of this fly-ash:H3PO4 nanocatalyst was studied with the obtained yield of products under solvent-free conditions. The synthesized substituted (E)-3-(3-methylthiophen-2-yl)-1-phenylprop-2-en-1-one compounds was characterized by physical constants, UV, FT-IR, 1H & 13C-NMR spectral data. The infrared group frequencies of ʋ(cm-1) of COs-cis & s-trans, CHip and CHop, CH=CHop, >C=C
    Źródło:
    World Scientific News; 2018, 112; 55-73
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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