Single-Particle Mineralogy of Chinese Soil Particles by the Combined Use of Low-ZParticle Electron Probe X-ray Microanalysis and Attenuated Total Reflectance-FT-IR Imaging Techniques

2011 ◽  
Vol 83 (20) ◽  
pp. 7970-7977 ◽  
Author(s):  
Md Abdul Malek ◽  
BoWha Kim ◽  
Hae-Jin Jung ◽  
Young-Chul Song ◽  
Chul-Un Ro
Keyword(s):  
Single Particle ◽  
Electron Probe ◽  
Imaging Techniques ◽  
Attenuated Total Reflectance ◽  
Total Reflectance ◽  
Soil Particles ◽  
X Ray ◽  
Ir Imaging ◽  
Combined Use ◽  
Ft Ir

Ageing mechanisms of the papers with zeolite and PCC fillers

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Merve Engin ◽  
Nural Yılgör ◽  
Celil Atik
Keyword(s):  
Attenuated Total Reflectance ◽  
Accelerated Ageing ◽  
Carbonyl Groups ◽  
X Ray Diffraction ◽  
Precipitated Calcium Carbonate ◽  
Total Reflectance ◽  
X Ray ◽  
Ft Ir ◽  
Diagnosis Approach

Abstract This work has been conducted to investigate the effect of accelerated ageing on the filler-free (control) handsheets and the ones having Precipitated Calcium Carbonate (PCC) and Zeolite (Clinoptilolite) fillers. The diagnosis approach of this work has been based on the use of the techniques of attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray diffraction (XRD). The FT-IR technique has allowed identifying the changes in cellulose components of handsheets. Likewise, the XRD technique has provided to diagnose the changes in crystallinity of the handsheets and fillers. The results found out that PCC and Zeolite fillers could be easily added to the structure of the paper network by changing various experimental variables. The loss of C−O functional groups and the formation of carbonyl groups in handsheets has been analysed by accelerated ageing. The spectroscopy results confirmed that usage of zeolite filler has a retarding and structurally improving effect on the glycosidic linkages. Recent findings have been provided new insights into the role of the synergistic effect of the combination of PCC and zeolite fillers in the decelerating of certain ageing mechanism.

scholarly journals Electrospun Membranes Based on Polycaprolactone, Nano-Hydroxyapatite and Metronidazole

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 931
Author(s):  
Ioana-Codruţa Mirică ◽  
Gabriel Furtos ◽  
Ondine Lucaciu ◽  
Petru Pascuta ◽  
Mihaela Vlassa ◽  
...  
Keyword(s):  
Fiber Diameter ◽  
Maximum Load ◽  
Guided Bone Regeneration ◽  
Attenuated Total Reflectance ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Total Reflectance ◽  
X Ray ◽  
Electrospun Membranes

The aim of this research was to develop new electrospun membranes (EMs) based on polycaprolactone (PCL) with or without metronidazole (MET)/nano-hydroxyapatite (nHAP) content. New nHAP with a mean diameter of 34 nm in length was synthesized. X-ray diffraction (XRD) and attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR) were used for structural characterization of precursors and EMs. The highest mechanical properties (the force at maximum load, Young’s modulus and tensile strength) were found for the PCL membranes, and these properties decreased for the other samples in the following order: 95% PCL + 5% nHAP > 80% PCL + 20% MET > 75% PCL + 5% nHAP + 20% MET. The stiffness increased with the addition of 5 wt.% nHAP. The SEM images of EMs showed randomly oriented bead-free fibers that generated a porous structure with interconnected macropores. The fiber diameter showed values between 2 and 16 µm. The fiber diameter increased with the addition of nHAP filler and decreased when MET was added. New EMs with nHAP and MET could be promising materials for guided bone regeneration or tissue engineering.

Single-Particle Characterization of Four “Asian Dust” Samples Collected in Korea, Using Low-ZParticle Electron Probe X-ray Microanalysis

2005 ◽  
Vol 39 (6) ◽  
pp. 1409-1419 ◽  
Author(s):  
Chul-Un Ro ◽  
HeeJin Hwang ◽  
HyeKyeong Kim ◽  
Youngsin Chun ◽  
René Van Grieken
Keyword(s):  
Single Particle ◽  
Electron Probe ◽  
Asian Dust ◽  
Particle Characterization ◽  
X Ray

scholarly journals Single-particle investigation of summertime and wintertime Antarctic sea spray aerosols using low-Z particle EPMA, Raman microspectrometry, and ATR-FTIR imaging techniques

2016 ◽  
Author(s):  
Hyo-Jin Eom ◽  
Dhrubajyoti Gupta ◽  
Hye-Rin Cho ◽  
HeeJin Hwang ◽  
SoonDo Hur ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Single Particle ◽  
Imaging Techniques ◽  
Sea Spray ◽  
Chemical Compositions ◽  
Research Station ◽  
Ftir Imaging ◽  
X Ray ◽  
Inorganic Species ◽  
Raman Microspectrometry

Abstract. Two aerosol samples collected at King Sejong Korean scientific research station, Antarctica on Dec. 9, 2011 in the austral summer (sample S1) and July 23, 2012 in the austral winter (sample S2), when the oceanic chlorophyll-a levels were quite different, by ~19 times (2.46 vs. 0.13 μg/L, respectively), were investigated on a single particle basis using quantitative energy-dispersive electron probe X-ray microanalysis (ED-EPMA), called low-Z particle EPMA, Raman microspectrometry (RMS), and attenuated total reflectance Fourier transform infrared (ATR-FTIR) imaging techniques to obtain their characteristics based on the elemental chemical compositions, molecular species, and mixing state. X-ray analysis showed that the supermicron summertime and wintertime Antarctic aerosol samples have different elemental chemical compositions, even though all the individual particles analyzed were sea spray aerosols (SSAs); i.e., the contents of C, O, Ca, S, and Si were more elevated, whereas Cl was more depleted, for sample S1 having a much higher chlorophyll-a level than for sample S2. Based on qualitative analysis of the chemical species present in individual SSAs by the combined application of RMS and ATR-FTIR imaging, different organic species were encountered in samples S1 and S2; i.e., Mg hydrate salts of alanine were predominant in samples S1 and S2, whereas Mg salts of fatty acids internally mixed with Mg hydrate salts of alanine were significant in sample S2. Although CaSO4 was encountered significantly in both samples S1 and S2, other inorganic species, such as Na2SO4, NaNO3, Mg(NO3)2, SiO2, and CH3SO3Mg, were encountered more significantly in sample S1, suggesting that those compounds may be related to the higher phytoplankton activity in summer.

scholarly journals Single-particle investigation of summertime and wintertime Antarctic sea spray aerosols using low-<i>Z</i> particle EPMA, Raman microspectrometry, and ATR-FTIR imaging techniques

2016 ◽  
Vol 16 (21) ◽  
pp. 13823-13836 ◽  
Author(s):  
Hyo-Jin Eom ◽  
Dhrubajyoti Gupta ◽  
Hye-Rin Cho ◽  
Hee Jin Hwang ◽  
Soon Do Hur ◽  
...  
Keyword(s):  
Single Particle ◽  
Imaging Techniques ◽  
Attenuated Total Reflection ◽  
Sea Spray ◽  
Chemical Compositions ◽  
Research Station ◽  
Ftir Imaging ◽  
X Ray ◽  
Inorganic Species ◽  
Raman Microspectrometry

Abstract. Two aerosol samples collected at King Sejong Korean scientific research station, Antarctica, on 9 December 2011 in the austral summer (sample S1) and 23 July 2012 in the austral winter (sample S2), when the oceanic chlorophyll a levels on the collection days of the samples were quite different, by  ∼  19 times (2.46 vs. 0.13 µg L−1, respectively), were investigated on a single-particle basis using quantitative energy-dispersive electron probe X-ray microanalysis (ED-EPMA), called low-Z particle EPMA, Raman microspectrometry (RMS), and attenuated total reflection Fourier transform infrared (ATR-FTIR) imaging techniques to obtain their characteristics based on the elemental chemical compositions, molecular species, and mixing state. X-ray analysis showed that the supermicron summertime and wintertime Antarctic aerosol samples have different elemental chemical compositions, even though all the individual particles analyzed were sea spray aerosols (SSAs); i.e., the contents of C, O, Ca, S, and Si were more elevated, whereas Cl was more depleted, for sample S1 than for sample S2. Based on qualitative analysis of the chemical species present in individual SSAs by the combined application of RMS and ATR-FTIR imaging, different organic species were observed in samples S1 and S2; i.e., Mg hydrate salts of alanine were predominant in samples S1 and S2, whereas Mg salts of fatty acids internally mixed with Mg hydrate salts of alanine were significant in sample S2. Although CaSO4 was observed significantly in both samples S1 and S2, other inorganic species, such as Na2SO4, NaNO3, Mg(NO3)2, SiO2, and CH3SO3Mg, were observed more significantly in sample S1, suggesting that those compounds may be related to the higher phytoplankton activity in summer.

Sign in / Sign up

Export Citation Format

Share Document