scholarly journals Elemental and Infrared Characterization of Contaminants in Second-Hand Cotton Garments From Flea Markets In Valencia City, Bukidnon, Philippines

2018 ◽  
Vol 8 (1) ◽  
pp. 10
Author(s):  
Marilou Auxtero Pedroso Butanas ◽  
Bienvenido Masirin Butanas Jr.
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Functional Group ◽  
X Ray ◽  
Cotton Material ◽  
Flea Markets ◽  
Flea Market ◽  
Scanning Electron

The use of Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) characterizations have been indispensable techniques in distinguishing purity of the samples. These techniques give spectra that will be used to analyze the composition, morphology, purity, among others, of the material. One of its interesting applications is to assess elemental and chemical contaminations on second hand clothing. In this study, second hand (Ukay-Ukay) cotton garments from selected flea market sites in Valencia City, Bukidnon, Philippines were examined quantitatively for microbial and chemical contaminations by using FTIR, SEM, and EDX. The FTIR results obtained in both sites showed broad peaks at ~3336 cm-1 attributed to OH functional group, and absorption peaks at 2901.30 cm-1 associated to C-H bond, 1159.70 cm-1, 1107.44 cm-1 and 1053.82 cm-1 attributed to the stretches of CO bond. All of them were characteristics of cotton material. We observed degradation of the cotton material on both sites evident in the decreasing intensity of OH stretching (at peaks around ~3334 cm -1 [site A] and ~3332 cm -1 [site B]) and C-O stretching (around ~1500-1700 cm-1). These were due to the presence of microorganisms such as fungi (e.g. Aspergillus species). The degradation was also observed in the SEM results. Furthermore, peaks related to carboxylate contaminants were observed in both sites around ~1600 – 1800 cm-1 that may be caused by the exposure of the cotton garments in hydrochloric acid (HCl). In general, the characterization results on both sites indicated traces of microorganisms and that the second-hand cotton clothes were contaminated by hazardous chemicals.

scholarly journals Characteristics of Paraffin Shielding of Kartini Reactor, Yogyakarta

2020 ◽  
Vol 35 (3) ◽  
pp. 195-198 ◽  
Author(s):  
Lana Khanifah ◽  
Susilo Widodo ◽  
Widarto ◽  
Ngurah Made Dharma Putra ◽  
Argo Satrio
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Ftir Spectroscopy ◽  
Nuclear Energy ◽  
Functional Group ◽  
Energy Agency ◽  
Radiation Attenuation ◽  
X Ray ◽  
Scanning Electron

The National Nuclear Energy Agency (BATAN) Yogyakarta uses two kinds of paraffin for shielding radiation of Kartini reactor. For developing BNCT research, the radiation attenuation capability of paraffin has been analyzed to find out the coefficient attenuation, density, and composition of both kinds of paraffin. The components of the paraffin were analyzed using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) spectroscopy characterization. Paraffin P1 has a density of 0.689 gr/mL and paraffin P2 is 0.578 gr/mL. Paraffin samples P1 and P2 were the sample content of functional group CH, CH2, and OH when analyzed by FTIR. Paraffin P2 had an additional content namely CO. The concentration of carbon (C) and oxide (O) of paraffin P2 was much greater than that of paraffin P1. Hydrogen (H) in the paraffin has the function of moderating neutrons, but hydrogen content in both kinds of paraffin could not be detected by EDX. The acquired neutron coefficient attenuation of paraffin P2 was 0.0382 cm-1 and the gamma coefficient attenuation was 0.0535 cm-1.

Synthesis and Characterization of NiO Doped SnO2 Nano-Flowers

2013 ◽  
Vol 575-576 ◽  
pp. 58-60
Author(s):  
Wei Ping Tang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectrum ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Hydrothermal Route ◽  
X Ray ◽  
Scanning Electron

In this present work, a new method for preparing NiO doped SnO2 nanoflowers by hydrothermal route is suggested. The composition and microstructure of samples were characterized by field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and Fourier transform infrared spectrum (FTIR). Moreover, a possible formation mechanism was discussed.

Characterization of Diatomite, Leonardite and Pumice

2016 ◽  
Vol 872 ◽  
pp. 211-215 ◽  
Author(s):  
Pusit Pookmanee ◽  
Atit Wannawek ◽  
Sakchai Satienperakul ◽  
Ratchadapon Putharod ◽  
Nattapol Laorodphan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Functional Group ◽  
Chemical Compositions ◽  
Carbonyl Groups ◽  
X Ray Diffraction ◽  
X Ray ◽  
Properties Of Materials ◽  
Scanning Electron

This research studies compositions of diatomite, leonardite and pumice for utilization appropriate to the properties of materials. Chemical compositions of these materials were characterized by X–ray fluorescence spectrometry (XRF) and energy dispersive X–ray spectrometry (EDXS). The silica was major component of these materials. The morphology was investigated by scanning electron microscopy (SEM). Diatomite was cylindrical in shape, leonardite was sheet or flake in shape and pumicewas prismatic in shape. The structure was studied by X–ray diffraction (XRD). It was found that the mineral composition of diatomite, leonardite and pumice showed cristobalite low, quartz and anorthite, respectively. The functional groups were identified by Fourier transform infraredspectrometry (FTIR). The functional group of siloxane was obtained and dominated vibration in these materials. And the vibration of carboxylic, alcoholic and carbonyl groups were obtained in leonardite.

Preparation and Characterization of Lizardite

2014 ◽  
Vol 556-562 ◽  
pp. 109-112
Author(s):  
Shu Min Zheng ◽  
Kai Ming Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Hydrothermal Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Lizardite were synthesized by hydrothermal reaction in an Fe3+doped solution/environment using nanometer SiO2and MgO as precursors. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR). The results show that: the synthetic samples are lizardite with a thickness ranging from 60 nm to 200 nm in the temperature range 200°C~230°C.

Crystallization of Aragonite from Vaterite Precursor during Various Refluxing Times

2015 ◽  
Vol 1119 ◽  
pp. 466-470 ◽  
Author(s):  
Radek Ševčík ◽  
Petra Mácová ◽  
Marta Pérez-Estébanez
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Powder Diffraction ◽  
X Ray ◽  
Gradual Transformation ◽  
Scanning Electron

CaCO3 polymorphs are intensively studied due to their importance in the nature and the widespread use in the industry as well. This work is dealing with the crystallization of aragonite from vaterite dispersion during the refluxation at 100°C. The characterization of CaCO3 polymorphs during vaterite transformation was performed with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray powder diffraction (XRPD). The influence of the different refluxing times on the aragonite crystallization was discussed. The purest aragonite, 70.7(2) wt.%, was synthetized in the sample refluxed for 60 minutes. Prolonged refluxation strongly affected aragonite crystals with gradual transformation into calcite.

Intercalation of Tb(III) into magadiite and characterization of Tb-intercalated magadiites

Clay Minerals ◽  
2016 ◽  
Vol 51 (4) ◽  
pp. 697-706 ◽  
Author(s):  
Yufeng Chen ◽  
Bao Yao ◽  
Yan Zou ◽  
Yudong Yan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Ion Exchange ◽  
Basal Spacing ◽  
X Ray Diffraction ◽  
X Ray ◽  
Differential Thermogravimetry ◽  
Scanning Electron

AbstractThe intercalation of Tb(III) into layered magadiite is achieved by three-step ion exchanges with H+/Na+, TBA+ (tetra-n-butylammonium ions)/H+ and Tb(EDTA)3+/TBA+. Various techniques, including powder X-ray diffraction (XRD), scanning electron microscopy equipped with energy dispersive X-ray (SEM-EDX), thermogravimetric and differential thermogravimetry (TG-DTG), Fourier transform infrared (FTIR) spectroscopy, and photoluminescent spectroscopy (PL), were employed to characterize the Tb-intercalated magadiites. The XRD results revealed that the basal spacing of the Tb-intercalated magadiites was obviously larger than that of the Na-magadiite, confirming the intercalation. The IR spectra showed no bands attributable to EDTA in the Tb-intercalated magadiites, indicating that the EDTA has broken away from Tb(III)-ETDA complexes during ion exchange. Moreover, the basal spacing of Tb-intercalated magadiite tends to increase slightly with the increase in water content in the Tb-intercalated magadiite. The PL spectra show weak emissions, attributed to 5D4-7FJ (J = 3, 4, 5, 6) transitions of Tb3+.

Characterization of Bismuth Vanadate Nanopowder Prepared by Microwave Method

2016 ◽  
Vol 872 ◽  
pp. 253-257 ◽  
Author(s):  
Pusit Pookmanee ◽  
Prakasit Intaphong ◽  
Jitrephan Phanmalee ◽  
Wiyong Kangwansupamonkon ◽  
Sukon Phanichphant
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Bismuth Vanadate ◽  
Microwave Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ammonium Vanadate ◽  
Scanning Electron

Bismuth vanadate (Bi2VO5.5) nanopowder was prepared by microwave method at 500 Watt for 2, 4 and 6 min. Bismuth nitrate pentahydrate (Bi (NO3)3•5H2O) and ammonium vanadate (NH4VO3) were used as the starting precursors with mole ratio of 2:1. The phase of Bi2VO5.5 nanopowder was characterized by X-ray diffraction (XRD). The morphology of Bi2VO5.5 nanopowder was investigated by scanning electron microscopy (SEM). The chemical composition of Bi2VO5.5 nanopowder was determined by energy dispersive X-ray spectroscopy (EDXS). The functional groups of Bi2VO5.5 nanopowder was identified by fourier transform infrared spectroscopy (FTIR).

PENINGKATAN LAJU DISOLUSI ACYCLOVIR DENGAN METODE SISTEM DISPERSI PADAT MENGGUNAKAN POLOXAMER 188

2016 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
Budi Setiawan ◽  
Erizal Zaini ◽  
Salman Umar
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Differential Thermal Analysis ◽  
Fourier Transform Infrared ◽  
X Ray Diffraction ◽  
Poloxamer 188 ◽  
X Ray ◽  
Scanning Electron

Sebuah penelitian tentang sistem dispersi padat dari asiklovir dengan poloxamer 188 telah dilakukan formulasi dengan pencampuran secara fisika dengan rasio 1 : 1, 1 : 3, 1 : 5 dan dispersi padat 1 : 1, 1 : 3, 1 : 5 dan penggilingan 1:1 sebagai pembanding. Dispersi padat dibuat menggunakan metode pencairan (fusi), yang digabung dengan poloxamer 188 pada hotplate kemudian asiklovir dimasukkan ke dalam hasil poloxamer 188 lalu di kocok hingga membentuk masa homogen. Semua formula yang terbentuk termasuk asiklovir poloxamer 188 murni dianalisis karakterisasinya dengan Differential Thermal Analysis (DTA), X-ray Diffraction, Scanning Electron Microscopy (SEM), dan Fourier Transform Infrared (FTIR), kemudian pengambilan dilakukan  (penentuan kadar) mengunakan spektrofotometer UV pada panjang gelombang 257,08 nm dan uji laju disolusi dengan aquadest bebas CO2 menggunakan metode dayung. Hasil pengambilan  (penentuan kadar) menunjukkan bahwa semua formula memenuhi persyaratan farmakope Amerika edisi 30 dan farmakope Indonesia edisi 4 yaitu 95-110%. Sedangkan hasil uji laju disolusi untuk campuran fisik 1: 1, dan dispersi padat 1: 1, dan penggilingan 1: 1 menunjukkan peningkatan yang nyata dibandingkan asiklovir murni. Hal ini juga dapat dilihat dari hasil perhitungan statistik  menggunakan analisis varian satu arah  SPSS 17.

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