Chemical composition of soil organic carbon from mixed aspen‐conifer forests characterized with Fourier transform infrared spectroscopy

2020 ◽  
Vol 72 (3) ◽  
pp. 1410-1430
Author(s):  
Mercedes Román Dobarco ◽  
Astrid R. Jacobson ◽  
Helga Van Miegroet
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Chemical Composition ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Conifer Forests

Using environmental variables and Fourier Transform Infrared Spectroscopy to predict soil organic carbon

CATENA ◽  
2021 ◽  
Vol 202 ◽  
pp. 105280
Author(s):  
Maryam Ghebleh Goydaragh ◽  
Ruhollah Taghizadeh-Mehrjardi ◽  
Ali Asghar Jafarzadeh ◽  
John Triantafilis ◽  
Marcos Lado
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Fourier Transform Infrared Spectroscopy ◽  
Environmental Variables ◽  
Fourier Transform Infrared

Investigation into the Differences Chemical Properties of Laser Sintering Polymer Powders Using Fourier Transform Infrared Spectroscopy

2014 ◽  
Vol 548-549 ◽  
pp. 133-136
Author(s):  
Yusoff Way ◽  
Hadi Puwanto ◽  
Farizahani ◽  
P.T. Pham
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Chemical Composition ◽  
Fourier Transform Infrared Spectroscopy ◽  
Surface Finish ◽  
Chemical Properties ◽  
Fourier Transform Infrared ◽  
Laser Sintering ◽  
Polymer Materials ◽  
Powder Materials

Selective Laser Sintering (SLS) or Laser Sintering (LS) allows functional parts to be produced in a wide range of powdered materials using a dedicated machine, and is thus gaining popularity within the field of Rapid Prototyping (RP). One of the advantages of employing LS is that the loose powder of the building chamber can be recycled. The properties of polymer powder significantly influence the melt viscosity and sintering mechanism during Laser Sintering (LS) processes which results in a good surface finish. The objective of this research is to investigate the chemical composition of fresh polymer materials used in Laser Sintering. There are seven virgin SLS materials which are PA2200, GF3200, Alumide, PrimeCast, PrimePart, Duraflex and CastForm. Fourier Transform Infrared Spectroscopy (FTIR) was used to analyze the chemical composition of the materials by using infrared radiation and absorbed frequency. The spectra show that similar functional groups were found in the materials apart from PrimePart and Duraflex. Obtained data from this analysis could be used to investigate on how the fresh and recycled powder materials with different chemical properties would affect the part surface finish.

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

The Composition of Essential Oils Obtained from Achillea millefolium and Matricaria chamomilla L., Originary from Romania

2018 ◽  
Vol 68 (12) ◽  
pp. 2787-2795 ◽  
Author(s):  
Mariana Daniela Berechet ◽  
Elena Manaila ◽  
Maria Daniela Stelescu ◽  
Gabriela Craciun
Keyword(s):  
Gas Chromatography ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Chemical Composition ◽  
Essential Oils ◽  
Fourier Transform Infrared Spectroscopy ◽  
Mass Spectrometer ◽  
Fourier Transform Infrared ◽  
Achillea Millefolium ◽  
Matricaria Chamomilla

In the present study we have investigated the chemical composition of the essential oils extracted by the procedure of hydrodistillation, from fresh flowers of Matricaria Chamomilla L. and Achillea Millefolium from Romania, two genres belonging to the same family, Asteraceae. The obtained essential oils were analyzed using the techniques of Gas Chromatography coupled with Mass Spectrometer and Fourier Transform Infrared Spectroscopy. It was found that both essential oils were dominated by the presence of terpenes. Aliphatic components were modest represented in both essential oils. The results were compared with those reported by other authors. Similarities consist in the domination of the same class of compounds and in the same modest representation of others. One of differences consists in the presence of some compounds with significant medicinal role, which were not reported by other authors. Another difference consists in the presence of some compounds in higher concentrations than those reported by other authors.

Experimental Study of White Heat Line Formation in Burned Bone Using Fourier Transform Infrared Spectroscopy

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Megan Gough ◽  
James Pokines ◽  
Sabra Botch-Jones
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Chemical Composition ◽  
Fourier Transform Infrared Spectroscopy ◽  
Cervus Elaphus ◽  
Physical Condition ◽  
Fourier Transform Infrared ◽  
Ovis Aries ◽  
Burned Bone ◽  
Thermal Signature

In anthropological analysis of burned bone, the presence of a white heat line (WHL) aids in determining a bone’s physical condition prior to burning, distinguishing between those burned fleshed or wet versus dry, making this thermal signature an important source of information regarding the relative timing of burning. While the relationship between WHLs and a bone’s physical condition has been studied, there is a lack of research concerning WHL chemical composition. The present study assessed the composition of WHLs that form on burned bone using Fourier Transform Infrared Spectroscopy (FTIR), including the effects of soft tissue and retention of bone’s organic material on a WHL’s development and appearance. Experimental remains consisted of isolated bones from pig (Sus scrofa), sheep (Ovis aries), white-tailed deer (Odocoileus virginianus), and elk (Cervus elaphus) in five physical conditions: fleshed, defleshed/very wet, partially wet, dry, and dry/soaked. Chemical composition was analyzed using spectral peak heights of the carbonate (CO3) ν3 (1415 cm-1), phosphate (PO4) ν3 (1035 cm-1), and amide I (1660 cm-1) vibrational bands. WHLs formed on 8 of 16 bones burned fleshed (50%) compared to 8 of 27 defleshed/very wet (29.6%). The partially wet, dry, and dry/soaked sample groups did not develop a WHL. Results indicate WHLs that formed on fleshed bone contained an increased amount of CO3, PO4, and amide I versus unburned controls. In contrast, WHLs that formed on defleshed/very wet bone contained decreased amounts. Additional research is needed to explore the exact mechanisms causing the formation of WHLs and their physical appearance.

scholarly journals Spektroskopia w podczerwieni z transformatą Fouriera w analizie składu kamieni nerkowych

2018 ◽  
Vol 64 (4) ◽  
Author(s):  
Renata Beata Szydlak ◽  
Piotr Maciukiewicz
Keyword(s):  
Fourier Transform ◽  
Uric Acid ◽  
Infrared Spectroscopy ◽  
Urinary Tract ◽  
Chemical Composition ◽  
Calcium Oxalate ◽  
Fourier Transform Infrared Spectroscopy ◽  
Kidney Stones ◽  
Fourier Transform Infrared ◽  
Gender Analysis

ABSTRACTIntroduction: Kidney stones are one of the most common diseases of the urinary tract, caused by metabolic and excretory disorders. Identification of the components of the stone is necessary to determine the cause of the formation of deposits and to choose the appropriate therapy.The aim of the study was to determine the chemical composition of the kidney stones.Materials and methods: Kidney stones recovered from 46 patients were analyzed for their chemical composition by Fourier transform infrared spectroscopy (FTIR). The resulting FTIR spectra of the kidney stones were compared to standards.Results: Of the 46 samples, 58.3% were comprised calcium oxalate, 28.3% struvites and 10.9% uric acid. Gender analysis showed that 69.6% of the examined stones were from men and 30.4% from women. Comparison with age revealed that the majority of respondents are people aged 30–44.Conclusions: Calcium oxalate, struvites and uric acid are commonly occurring kidney stones.

Fourier-Transform Infrared Spectroscopy Analysis of the Changes in Chemical Composition of Wooden Components in the Ancient Building of Xichuan Guild Hall

2020 ◽  
Vol 70 (4) ◽  
pp. 448-452
Author(s):  
Yan Yang ◽  
He Sun ◽  
Bin Li ◽  
Aifeng Wang ◽  
Rui Zhao ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Chemical Composition ◽  
Fourier Transform Infrared Spectroscopy ◽  
Crystallinity Index ◽  
Brown Rot ◽  
Fourier Transform Infrared ◽  
Absorption Peak ◽  
White Rot ◽  
Red Oak

Abstract In order to investigate the decay mechanism in red oak (Quercus rubra) and Schima (Schima spp.) wood in the ancient building of Xichuan Guild Hall, the changes in chemical composition were determined using Fourier-Transform Infrared Spectroscopy. The results were as follows: (1) The absorption peak intensities that represented the structural contribution of carbohydrates, and the crystallinity index of the cellulose in the red oak components, decreased noticeably by 55.70 percent in H1039/H1508, and 26.85 percent in H1370/H2900; while those of lignin were increased as a result of the brown rot process. These changes indicated that the brown-rot fungi had stronger degradation effects on hemicellulose and cellulose over lignin. (2) The absorption peak intensities of the carbohydrates (a part of the lignin) and the crystallinity index of the cellulose decreased noticeably by 22.50 percent in H1039/H1508, 25.00 percent in H1508/H1735, and 21.74 percent in H1429/H897 after white rot in the Schima wood components. These findings indicated that not only cellulose and hemicellulose but also lignin were attacked by white-rot fungi. By comparison, the extent of fungal damage in the wood components was lower in the Schima wood components than that in the red oak components.

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