scholarly journals The Degree of Deacetylation Chitosan Various Marine Shells

2018 ◽  
Author(s):  
sinardi ◽  
Prayatni Soewondo ◽  
Suprihanto Notodarmojo ◽  
cynthia radiman
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Natural Product ◽  
Fourier Transform Infrared Spectroscopy ◽  
Ir Spectrum ◽  
Fourier Transform Infrared ◽  
Raw Material ◽  
Natural Coagulant ◽  
Degree Of Deacetylation ◽  
The Fourier Transform

Chitosan is a natural product derived from biopolymers such as chitin and cellulose and is found in the exoskeleton of marine sources. Chitosan was produced through 3 subsequent processes i.e. deproteination, demineralization and deacetylation.The aim of this study is to determine degree of deacetylation chitosan. The degree of deacetylation was calculated from IR spectrum using the Fourier Transform Infrared spectroscopy (FTIR). The degree of deacetylation of chitosan from Penaeusmonodon, Scylla sp, and Mytilus virdis linneausshells, were 89.05%, 87.64%, and 77.80%. Marine shells used as raw material of chitosan and enhancement degree of deacetylation potential to be used as natural coagulant.

Infrared Spectra of Poly(Methyl Methacrylate) Labeled with Oxygen-18

1979 ◽  
Vol 33 (6) ◽  
pp. 551-555 ◽  
Author(s):  
Stoil Dirlikov ◽  
Jack L. Koenig
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Infrared Spectrum ◽  
Methyl Methacrylate ◽  
Fourier Transform Infrared Spectroscopy ◽  
Infrared Spectra ◽  
Fourier Transform Infrared ◽  
Simple Method ◽  
Poly Methyl Methacrylate ◽  
The Fourier Transform

Fourier transform infrared spectrum of atactic poly(methyl methacrylate) (PMMA) is compared with that of atactic PMMA labeled with 18O in the ester groups. The results obtained define the assignment of the bands associated with vibrations of the ester groups of PMMA. Furthermore, the Fourier transform infrared spectroscopy provides a simple method for obtaining the spectra of “pure” derivatives containing 18O.

Production and characterization of boron nitride-doped nanofiber mats created through electrospinning

2016 ◽  
Vol 47 (6) ◽  
pp. 993-1005 ◽  
Author(s):  
Yasemin Cakmak ◽  
M Fatih Canbolat ◽  
Enes Cakmak ◽  
Mehmet Dayik
Keyword(s):  
Thermal Stability ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Boron Nitride ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Electrospinning Method ◽  
The Fourier Transform ◽  
Nanofiber Mats

The aim of this study was to produce advanced nanofiber mats by adding boron nitride to poly (ɛ-caprolactone) polymer using an electrospinning method and to characterize the resultant structures. Pure poly (ɛ-caprolactone) nanofiber mats and boron nitride-doped nanofiber mats prepared at different concentrations were compared. The morphological structures of the nanofiber mats were examined under a scanning electron microscope, spectroscopic analyses were conducted using Fourier transform infrared spectroscopy, and thermal stability was analyzed using a thermogravimetric analysis method. Successful electrospinning of boron nitride-doped nanofibers at lower voltages was achieved. The thermogravimetric analysis test found that the thermal stability of boron nitride-doped nanofiber mats is higher than that of pure nanofibers, which suggests that the produced composite material could be preferable in applications involving insulation and high temperature. On the other hand, the Fourier transform infrared spectroscopy results indicated that no chemical reaction occurred between boron nitride and the poly (ɛ-caprolactone) nanofibers.

scholarly journals PENGARUH WAKTU PROSES DEASETILASI KITIN DARI CANGKANG BEKICOT (Achatina fulica) TERHADAP DERAJAT DEASETILASI

KOVALEN ◽  
2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Wahyuni Wahyuni ◽  
Ahmad Ridhay ◽  
Nurakhirawati Nurakhirawati
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Achatina Fulica ◽  
Degree Of Deacetylation ◽  
Processing Times

ABSTRACT Research on the effect of chitin deacetylation processing times from shells of snails on the degree of deacetylation has conducted with a variations of 60 minutes, 90 minutes, 120 minutes and 150 minutes. The purpose of this study was to determine the effect of times improvement in the chitin deacetylation process of the degree of deacetylation. The degree of deacetylation is determined using Fourier Transform Infrared spectroscopy (FTIR). The results show the degree of deacetylation increases with the length of time the process of deacetylation that is 60 minutes to produce the degree of deacetylation of 55.6%, a degree of deacetylation of 90 minutes produces 62.4%, 120 minutes produces 70.3% degree of deacetylation, and time 150 minutes to produce the degree of deacetylation of 84.3%. So that, the length of time spent on the process of deacetylation of chitin from a snail shells, can increase the degree of deacetylation. Keywords: Snail Shells, Times, Degree of Deacetylation, Chitin, Chitosan

Fourier Transform Infrared Spectroscopy for Wear Debris Adhesion on PEEK Bearing Surface

2013 ◽  
Vol 307 ◽  
pp. 372-376 ◽  
Author(s):  
Koshiro Mizobe ◽  
Masahiro Takamiya ◽  
Takashi Honda ◽  
Hitonobu Koike ◽  
Edson Costa Santos ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Wear Debris ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Fourier Transform Infrared ◽  
Rolling Contact ◽  
Materials Used ◽  
The Fourier Transform

Polyetheretherketone (PEEK), a tough semi-crystalline thermoplastic polymer with excellent mechanical properties and polytetrafluoroethylene (PTFE), valued for its low friction coefficient are popular materials used for the production of bearings. In this work, rolling contact fatigue (RCF) tests were performed in order to investigate wear on bearing surfaces by using the Fourier Transform Infrared Spectroscopy (FT-IR). It is reported that PEEK’s specific peak at 1243cm-1was shifted and PEEK’s polymer bearing crystalline content level on wear surface remained unchanged by contact stress or wear debris adhesion.

scholarly journals The Fourier transform infrared spectroscopy from Diplazium esculentum and Rivina humilis analysis to reveals the existence of necessary components in oil palm plantations of Ganoderma boninense control

2021 ◽  
Vol 22 (9) ◽  
Author(s):  
Wismaroh Sanniwati Saragih ◽  
EDISON Purba ◽  
Lisnawita LISNAWITA ◽  
MOHAMMAD BASYUNI
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Oil Palm ◽  
Functional Group ◽  
Fourier Transform Infrared ◽  
Positive Control ◽  
Negative Control ◽  
Ganoderma Boninense ◽  
The Fourier Transform

Abstract. Saragih WS, Purba E, Lisnawita, Basyuni M. 2021. The Fourier transform infrared spectroscopy from Diplazium esculentum and Rivina humilis analysis reveals necessary components in oil palm plantations of Ganoderma boninense control. Biodiversitas 22: 3645-3651. The Fourier transform infrared spectroscopy (FTIR) has been widely utilized for biological samples and biomolecular characterization. We aim to identify Ganoderma boninense through FTIR and obtain a functional group that can facilitate early basal stem rot detection. Here, positive control (KP) was not inoculated with G. boninense and negative control (KN) was inoculated with G. boninense. However, the treatment samples, Diplazium esculentum leaf extract, Rivina humilis leaf extract, and fungicide treatment, were not inoculated with G. boninense. The positive control oil-palm leaf samples exhibited spectral bands similar to those in the D. esculentum extract, R. humilis extract, and fungicide treatment. Strong bonds were observed at wavelengths 3379 cm-1, 2927 cm-1, 1639 cm-1, and 1056 cm-1. Others were moderate to weak, except the negative control samples with strong bonds at 2044 cm-1. This indicates amine N-H functional groups, alkane functional group C-H, functional group alkene C=C, C-O, functional group ester, and functional group isothiocyanate N=C=S (C4H5NS or CH2 = CHCH2N=C=S). The FTIR plot result denotes G. boninense through N=C=S Isothiocyanate functional group presence at 2140-1990 cm-1. This unique structure is only found in infected oil-palm leaf tissues of G. boninense. Our study suggests that FTIR spectroscopy is more beneficial than conventional methods in early detection of G. boninense infection in oil palm.

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 Structural characterizations of three-dimensional crimped silk yarns

2015 ◽  
Vol 19 (4) ◽  
pp. 1337-1340
Author(s):  
Yan Zhang ◽  
Yuyue Chen ◽  
Hong Lin
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Nitrate Solution ◽  
Calcium Nitrate ◽  
Three Dimensional ◽  
Fourier Transform Infrared ◽  
Secondary Structures ◽  
The Fourier Transform ◽  
Structural Characterizations

Silk yarns which are composed of two single yarns with different twist directions are treated with calcium nitrate solution at 95 ?C, and a 3-D crimped structure is formed. The Fourier transform infrared spectroscopy spectrum is used to reveal the change of the secondary structures of silk fiber.

Characterization of Photoluminescence and Surface Chemistry after Annealing about Si:SiO2 Films Fabricated by Radio Frequency Sputtering

2016 ◽  
Vol 698 ◽  
pp. 13-18 ◽  
Author(s):  
Koichi Tanaka ◽  
Taichi Yoshida
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Surface Chemistry ◽  
Radio Frequency ◽  
Fourier Transform Infrared Spectroscopy ◽  
Annealing Temperature ◽  
Fourier Transform Infrared ◽  
Radio Frequency Sputtering ◽  
The Fourier Transform

We fabricated Si:SiO2 films and assessed its characterization of photoluminescence and surface chemistry. When Si tablets on a SiO2 target were sputtered in a chamber of a radio frequency sputtering device, Si:SiO2 films were deposited on a substrate. When the films were excited by a He-Cd laser, photoluminescence having wide and continuous peaks was emitted in shorter region than 600 nm. After annealing, intensity of photoluminescence changed, which depends on annealing temperature and time. By the Fourier Transform InfraRed Spectroscopy, bonds of atoms around Si were investigated.

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