scholarly journals Fourier transform infrared spectroscopy (FTIR) analysis, chlorophyll content and antioxidant properties of native and defatted foliage of green leafy vegetables

2015 ◽  
Vol 52 (12) ◽  
pp. 8131-8139 ◽  
Author(s):  
S. Sravan Kumar ◽  
P. Manoj ◽  
P. Giridhar
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Chlorophyll Content ◽  
Fourier Transform Infrared Spectroscopy ◽  
Antioxidant Properties ◽  
Fourier Transform Infrared ◽  
Leafy Vegetables ◽  
Ftir Analysis ◽  
Green Leafy Vegetables

scholarly journals Karakterisasi Nitroselulosa dari Pulp Larut Bambu Beema dan Bambu Industri

2019 ◽  
Vol 9 (01) ◽  
pp. 25
Author(s):  
Frederikus Tunjung Seta ◽  
Susi Sugesty ◽  
Reynaldo Biantoro
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Chemical Composition ◽  
Nitrogen Content ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Dissolving Pulp ◽  
Raw Material ◽  
Ftir Analysis ◽  
Bamboo Pulp

Saat ini Indonesia masih mengandalkan impor nitroselulosa sebagai bahan baku propelan. Tujuan penelitian ini adalah mencari komposisi optimum pembuatan nitroselulosa untuk propelan dari bahan baku pulp larut bambu Beema dan Industri sebagai alternatif dari pulp larut kayu. Sebelum proses nitrasi, pulp larut bambu Beema dan bambu Industri mengalami proses perlakuan awal dengan menggunakan willey mill, pulp larut kemudian diayak dan diambil pulp dengan ukuran kurang dari 60 mesh. Pada proses nitrasi, perbandingan bahan kimia yang digunakan adalah formula 1 (HNO3:HNO3 Fumming:H2SO4= 2,5:1:9,5), formula 2 (HNO3:HNO3 Fumming:H2SO4= 3:1:7,5), dan formula 3 (HNO3:HNO3 Fumming:H2SO4= 1:1:1,6). Hasil yang didapatkan pada penelitian ini pulp larut dari bahan baku bambu Beema dengan formula 3 mampu mendapatkan kadar nitrogen tertinggi (12,97%). Analisis Fourier-transform infrared spectroscopy (FTIR) menunjukkan adanya gugus nitro dan pada uji bakar juga menunjukkan bahwa nitroselulosa dapat terbakar dengan cepat. Akan tetapi, nilai kelarutan dalam aseton dan eter-alkohol nitroselulosa dari kedua jenis bambu menunjukkan bahwa distribusi kadar nitrogen pada proses nitrasi masih belum memenuhi standar.Kata kunci: bambu, kadar nitrogen, nitroselulosa, pulp larut, propelanCharacterization of Nitrocellulose from Beema Bamboo and Industrial Bamboo Dissolving PulpAbstractCurrently, Indonesia still relies on imports of nitrocellulose as a propellant raw material. The objective of this research is to determine the optimum composition of nitrocellulose making for propellant from Beema bamboo pulp and Industrial bamboo pulp as an alternative of dissolving pulp from wood. Prior to the nitration process, both dissolving pulp of Beema bamboo and industrial undergo a pretreatment process using willey mill, the pulp then sieved and taken with a size less than 60 mesh. In the nitration process, the chemical composition used is  formula 1 (HNO3: HNO3 Fumming: H2SO4 = 2.5: 1: 9.5), formula 2 (HNO3: HNO3 Fumming: H2SO4 = 3: 1: 7,5) and the   formula 3 (HNO3: HNO3 Fumming: H2SO4 = 1: 1: 1,6). Result showed that dissolving pulp from Beema bamboo with third formula get the highest nitrogen content (12,97%). Fourier-transform infrared spectroscopy (FTIR)  analysis showed that all of the nitrocellulose have nitro group and with burning test also proved that nitrocellulose can be rapidly burdened. However, the solubility of  nitrocellulose in acetone and ethers-alcohols indicates that the distribution of nitrogen content in the nitration process is not meet the standard yet. Keywords: bamboo, nitrogen content, nitrocellulose, dissolving pulp, propellant

scholarly journals FOURIER TRANSFORM INFRARED SPECTROSCOPY SPECTROSCOPIC STUDIES IN EMBELIA RIBES BURM. F.: A VULNERABLE MEDICINAL PLANT

2016 ◽  
Vol 9 (9) ◽  
pp. 41 ◽  
Author(s):  
Vidya Viswas Kamble ◽  
Nikhil Babruvan Gaikwad
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Petroleum Ether ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Nitro Compounds ◽  
Alkyl Halides ◽  
Aliphatic Amines ◽  
Ftir Analysis ◽  
Embelia Ribes

ABSTRACTObjective: The present study was aimed to identify the functional group present in the crude powder and various solvent extracts of Embelia ribesBurm. f. stem, leaves, and berries through Fourier transform infrared (FTIR) spectroscopy.Methods: Different plant parts of E. ribes were collected shade dried, powdered, and extracted in methanol, ethanol, and petroleum ether. Theseextracts were used to detect the characteristic peak values and their functional groups using FTIR method on a OMNI sampler attenuated totalreflectance accessory on a JASCO FTIR spectrophotometer (FTIR‐4600).Results: The crude powder of E. ribes leaves, stem, and berries FTIR analysis confirmed the presence of amino acids, amide, alkanes, carboxylicacids, alcohols, esters, ethers, aromatics, aliphatic amines, phenols, aldehyde, ketones, fluorides, halogen, alkyl halides, and nitro compound. The drymethanolic and ethanolic extracts of E. ribes leaves, stem, and berries FTIR analysis results proved the presence of alcohols, p-substituted alcoholsor phenols, phenols, alkanes, alkynes, alkenes, aldehyde, ester, ether, aliphatic amines, carboxylic acids, aromatics, ketones, disulphide, alkyl halides,halogen, and nitro compounds, whereas dry petroleum ether extract shown the presence of amide, alkanes, carboxylic acids, alcohols, p-substitutedalcohols or phenols, esters, aromatics, aldehyde, ketones, aryl disulphide, aliphatic amines, aliphatic compound, alkyl halides, and nitro compounds,respectively.Conclusion: The results of the present study produced the FTIR spectrum profile for the vulnerable medicinally important plant E. ribes Burm. f.Keywords: Embelia ribes Burm. f., Fourier transform infrared spectroscopy, Spectroscopy, Functional groups.

scholarly journals Fourier-transform infrared spectroscopy (FTIR) analysis of triclinic and hexagonal birnessites

2017 ◽  
Vol 178 ◽  
pp. 32-46 ◽  
Author(s):  
Florence T. Ling ◽  
Jeffrey E. Post ◽  
Peter J. Heaney ◽  
James D. Kubicki ◽  
Cara M. Santelli
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Ftir Analysis

scholarly journals The Fourier transform infrared spectroscopy (FTIR) analysis for the clay mineralogy studies in a clastic reservoir

2022 ◽  
Author(s):  
Golnaz Jozanikohan ◽  
Mohsen Nosrati Abarghooei
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Clay Minerals ◽  
Mixed Layer ◽  
Evaluation Studies ◽  
Clay Mineralogy ◽  
Fourier Transform Infrared ◽  
Ftir Analysis ◽  
X Ray

AbstractThe complete characteristics knowledge of clay minerals is necessary in the evaluation studies of hydrocarbon reservoirs. Ten samples taken from two wells in a heterogeneous clastic gas reservoir formation in NE Iran were selected to conduct the transmission Fourier transform infrared spectroscopy (FTIR) tests for the clay mineralogy studies. The FTIR analysis showed that there were clear signs of clay minerals in all samples. The wavenumber region of the clay minerals in FTIR tests was detected to be 3621, 3432, 1034, and 515 cm−1 for illite, 3567, 3432, 1613, 1088, 990, 687, 651, and 515 cm−1 for magnesium-rich chlorite, 3700, 3621, 3432, 1034, 687, and 463 cm−1 for kaolinite, and 3567, 1088, 990, and 463 cm−1 for glauconite. After screening of samples by the FTIR method, the samples were then analyzed by powder X-ray diffraction (PXRD), wavelength dispersive X-ray fluorescence (WDXRF), and scanning electron microscopy (SEM). The PXRD and SEM result showed illite was by far the most common clay present. Kaolinite, magnesium-rich chlorite, and traces of smectite and the mixed-layer clays of both the illite–smectite and chlorite-smectite types were also recognized. The combination of PXRD and WDXRF results could quantify the clay abundances in the each well too. It was concluded that the FTIR analysis successfully could show the absorption bonds of all constituent clays. However, the infrared absorption spectra of mixed-layer clays overlapped those of the respective constituents of each mixed-layer minerals. This can be considered as the evidence of the usefulness of FTIR technique in the screening of the samples for the clay mineralogy studies.

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