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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Applied Chemistry for Engineering
Journal Basic Information
Journal DOI :
The Korean Society of Industrial and Engineering Chemistry
Editor in Chief :
Volume & Issues
Volume 22, Issue 6 - Dec 2011
Volume 22, Issue 5 - Oct 2011
Volume 22, Issue 4 - Aug 2011
Volume 22, Issue 3 - Jun 2011
Volume 22, Issue 2 - Apr 2011
Volume 22, Issue 1 - Feb 2011
Selecting the target year
Production of C4-C6 for Bioenergy and Biomaterials
Kim, Byung-Chun ; Yi, Sung Chul ; Sang, Byoung-In ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 447~452
Depletion of petroleum increased the need of alternative energy and chemical resources. Biomass, a renewable resource, can be transformed to bioenergy and biomaterials, and the materials from biomass will ultimately substitute petroleum based energy and chemical compounds. In this perspective, production of C4-C6 compounds for bioenergy and biomaterials are described for understating of current research progress. n-Butanol and n-butyric acid, the major C4 compounds, are produced by Clostridium tyrobutyricum, Clostridium beijerinckii, and Clostridium acetobutylicum. n-Hexanoic acid, a typical C6 compound, is produced by Clostridium kluyveri and Megasphaera elsdenii. Reported maximum amount of n-butanol, n-butyric acid and n-hexanoic acid was 21, 55, and 19 g/L, respectively, and extraction of these C4-C6 compounds are induced increase production by those anaerobic bacteria. In addition, a new bacterium Clostridium sp. BS-1 produced 5 g/L of n-hexanoic acid using galactitol.
Antimicrobial Activity and Mechanism of Supercritical Fluids
Mun, Sungmin ; Kim, Jungchan ; Lee, Youn-Woo ; Yoon, Jeyong ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 453~460
Recently, there is growing interests in the application of supercritical fluids for food and medical fields since supercritical fluids (
) have known to be safe and effective as a non-thermal sterilization technique. Although supercritical fluids have been investigated for various kinds of products, they have not yet been used in common currency due to their lack of knowledge related to the antimicrobial activity or detailed mechanisms. In this review paper, we summarized the characteristics, antimicrobial activity and mechanisms, important factors, and applicability of supercritical fluids to help the investigation and commercialization of supercritical fluids sterilization technique.
Electrochemical Characterization of Fluorine Doped
Dye-Sensitized Solar Cells
Lee, Sung Kyu ; Im, Ji Sun ; Lee, Young-Seak ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 461~466
In this study, the fluorine doped
was prepared as a photoelectrode in order to improve the efficiency of dye-sensitized solar cells and estimated the electrochemical characterizations. The energy conversion efficiency of the prepared dye-sensitized solar cells using fluorine doped
was calculated from a current-voltage curve. The efficiency of prepared dye-sensitized solar cells was improved by about maximum three times by F-doping on
. It was suggested that the efficiency of dye-sensitized solar cells was improved by hybrid semiconductors of
in photoelectrode based on reduced
energy level via fluorine doping. It can be confirmed that the electron transport was faster but the electron recombination was slower by doping fluorine on
in photoelectrode through intensity-modulated photocurrent spectroscopy and intensity-modulated photovoltage spectroscopy analysis.
Fluoro-illite/polypropylene Composite Fiber Formation and Their Thermal and Mechanical Properties
Jeong, Euigyung ; Lee, Young-Seak ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 467~472
This study investigated illite/polypropylene (PP) composite filament formation via melt-spinning and evaluated their physical properties to prepare functional fibers using natural materials. When composite filaments were formed, the composite filaments exhibited smaller fiber diameters compared to that of neat PP filament because of the lubricant effect of illite induced by its layered structure. Moreover, fluorination effect increased interfacial affinity and dispersion in the polymer, resulting in smaller diameter of fluorinated illite/PP composite filament, which was 2/3 of the neat PP filament diameter. Addition of raw and fluorinated illite improved thermal stability of illite/PP composite filament. Raw illite/PP composite filament cannot be used for a practical application, because it broke during drawing process, whereas the fluorinated illite/PP composite filament can be used for a practical application, because it exhibited similar tensile strength of the neat PP filament and 50% increased modulus. Even with improved illite/PP interfacial affinity and illite dispersion in the polymer, illite/PP composite filament formed microcomposite, because non-expandable illite had strongly bound layers, resulting in only a little illite exfoliation and PP intercalation into illite.
Solubilization of Para-Halogenated Benzoic Acid Isomers by the Solution of Tetradecyltrimethylammonium Bromide
Lee, Nam-Min ; Lee, Byung-Hwan ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 473~478
The interaction of para-halogenated benzoic acid isomers with the micellar system of tetradecyltrimethylammonium bromide was studied by the UV/Vis spectrophotometric method. The solubilization constants (
) of benzoic acid isomers into the micellar system of TTAB and the critical micelle concentration (CMC) of TTAB have been measured with the change of temperature. Various thermodynamic parameters have been calculated and analyzed from those measurement. The results show that the values of
for the solubilization of all isomers are negative and the values of
are all positive within the measured temperature range. The effects of additives (n-butanol and NaCl) on the solubilization of benzoic acid isomers have been also measured. There was a great decrease on the values of
and CMC simultaneously with these additives. From these changes we can postulate that the solubilization sites of each isomers in the TTAB micellar system are the surface or the palisade region of the micelle.
Synthesis of Pt-Bi/Carbon Electrodes by Reduction Method for Direct Methanol Fuel Cell
Kim, Kwan Sung ; Kim, Min Kyung ; Noh, Dong Kyun ; Tak, Yong Sug ; Baeck, Sung Hyeon ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 479~485
Pt-Bi/C catalysts supported on carbon black with various Pt/Bi ratios were synthesized by a reduction method. Chloroplatinic acid hydrate (
) and bismuth (III) nitrate pentahydrate (
) were used as precursors for Pt and Bi, respectively. Before loading metal on carbon, heat treatment and pretreatment of carbon black in an acidic solution was conducted to enhance the degree of dispersion. The physical property of the synthesized catalysts was investigated by X-ray diffraction and X-ray photoelectron spectroscopy. The XRD pattern of untreated Pt-Bi/C catalyst showed BiPt and
peaks in addition to Pt peaks. These results imply that Bi atoms were incorporated into the Pt crystal lattice by Pt-Bi alloy formation. The catalytic activity for methanol oxidation was measured using cyclic voltammetry in a mixture of 0.5 M
and 0.5 M
aqueous solution. The addition of proper amount of Bi was found to significantly improve catalytic activity for methanol oxidation. The catalytic activity for methanol oxidation was closely related to the stability between electrode and electrolyte. In order to investigate the stability of catalysts, chronoamperometry analysis was carried out in the same solution at 0.6 V.
Removal of Diazinon Using Recombinant Biocatalyst
Choi, Suk Soon ; Seo, Sang Hwan ; Kang, Dong Gyun ; Cha, Hyung Joon ; Kwon, Inchan ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 486~489
In the present work, diazinon which is known as nondegradable and environmental toxic material was efficiently treated by the cell surface-displayed organophosphorus hydrolase (OPH) biocatalyst. The culture temperature of
culture temperature and the addition of 0.2 mM ethylenediamine tetraacetate (EDTA) were effective conditions for the production of recombinant OPH in Escherichia coli. 25 and 50 ppm diazinon were treated with removal rate of 4.5 and 7.2
, respectively and with all over 90% removal efficiencies using recombinant cell lysates through ultrasonication disruption process. Thus, these experimental results could be utilized in environmental friendly biological treatment system for toxic chemicals such as diazinon.
Thermal and Surface Properties of PET/Nylon66/Clay Nanocomposites
Lee, Minho ; Ku, Jahun ; Min, Byung Hun ; Kim, Jeong Ho ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 490~494
Nanocomposites of blends of polyethyleneterephthalate (PET) and polyamide66 (Nylon66) containing natural and organically modified montmorillonite clays (PM,
25A and 15A) were prepared by melt mixing. DSC results showed that the addition of clay changed the crystallization behavior of PET/Nylon66 nanocomposites. Clay C25A was observed to most significantly change the crystallization temperature than other clays in blends of PET and Nylon66, which may be caused by the difference in interaction with matrix polymers. AFM results also showed that the lowest value of surface roughness was observed for nanocomposites containing C25A indicating the smooth and relatively homogenous surface. Mechanical properties measurement showed the similar results. Contact angle was measured to study the difference in hydrophobicity. An increase in contact angle was observed for nanocomposites with C25A or C15A due to the increased hydrophobicity.
Synthesis of Carbon Materials from PFO, Byproducts of Naphtha Cracking Process
Lee, Jiyon ; Park, Seung-Kyu ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 495~500
Separation of naphthalene from pyrolyzed fuel oil, by product of Naphta cracking process (NCC) process, has been accomplished by the solvent extraction, distillation and purification process. The residual pyrolyzed fuel oil (PFO), called precursor of carbon materials, has been calcined at
in nitrogen gas to raw pitch. After the treatment of PFO by hexane and methanol, either a flake phased carbon at
or a carbon sphere at above
forms. As the calcination temperature increases, the shape of raw pitch changes from the flake phase to the sphere one, and the size of them decreases to several
. Based on the BET and XRD spectrum, the carbon sphere is classified to a mesophase amorphous carbon with a cubic phase.
Physical Properties of Insulating Composite Materials Using Natural Cellulose and Porous Ceramic Balls as a Core Materials
Hwang, Eui-Hwan ; Cho, Soung-Jun ; Kim, Jin-Man ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 501~507
To develop environmental-friendly insulating composite materials, natural cellulose and porous ceramic balls were used as core materials and activated Hwangtoh was used as a binder. Various specimens were prepared with different water/binder ratios and core material/binder ratios. The physical properties of these specimens were then investigated through compressive strengths, flexural strengths, absorption test, hot water resistance test, pore analysis, thermal conductivity, and observation of micro-structures using scanning electron microscope. Results showed that the maximum compressive strength varied appreciably with the water/binder ratios and core material/binder ratios, but the flexural strength increased with the core material/binder ratios regardless of water/binder ratios. The compressive strength and the flexural strength measured after the hot water resistance test decreased remarkably compared to those measured before test. The pore analysis measured after the hot water resistance test showed that total pore volume, porosity and average pore diameter decreased, while bulk density increased by the acceleration of hydration reaction of binder in the hot water. The thermal conductivity decreased gradually with an increase of core material/binder ratios. It can be evaluated that the composite insulation materials having good insulating properties and mechanical strengths can be used in the field.
Pyrolysis Characteristics of Hemp By-products (Stem, Root and Bast)
Choi, Gyeong-Ho ; Kim, Seung-Soo ; Kim, Jinsoo ; Joo, Dong-Sik ; Lee, Janggook ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 508~513
Hemp is known as one of the most productive and useful plants, which grows quickly in a moderate climate with only moderate water and fertilizer. Traditionally in Korea, hemp bast is used to natural fibres, and remaining such as stem and root is treated as waste. Those of hemp by-products can be transformed to bio fuel such as bio-oil and activated carbon. To understand pyrolysis characteristics, thermogravimetric analysis were carried out in TGA, in which hemp by-products were mostly decomposed at the temperature range of
. The corresponding kinetic parameters including activation energy and pre-exponential factor were determined by differential method over the degree of conversions. The values of activation energies for pyrolysis were increased as the conversion increased from 10 to 90%.
Preparation of Magnesium Oxide Nanowires from a Magnesium Foil
Lee, Byung Gun ; Choi, Jinsub ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 514~517
Herein, we fabricated magnesium oxalate nanostructures by chemical etching of a magnesium foil in alcoholic solvents containing acidic media. Interestingly, we could obtain magnesium oxalate nanowires in ethanolic oxalic acid. Growth mechanism for magnesium oxalate nanowires was investigated in terms of etching time. Annealing conditions were determined from TGA results. Magnesium oxalate nanowires were converted to magnesium oxide nanowires by thermal treatment and the magnesium oxide nanowires were examined by FE-SEM and FT-IR measurement.
The Operating Condition and Flow Field Design Effect on the Anode Water Management of a Proton Exchange Membrane Fuel Cell (PEMFC)
Hong, In Kwon ; Kim, Sunhoe ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 518~521
A PEMFC single cell with the active area of
was used to verify the effect of water management in the anode. Water management is one of the most critical operating variables. In this paper the effect of operating condition change, such as anode humidification and temperature, was investigated under constant current density of 200 mA/cm 2 where possible anode flooding operating area. Also experiments to observe the effect of the anode and cathode stoichiometry change and flow field design on the water management were performed. The water management was effected by the stoichimetry change. The temperature and humidification change also affected the fuel cell performance.
Enzyme-linked Immunosorbent Assay Strip Sensor for Rapid Detection of Staphylococcus aureus
Park, So Jung ; Kim, Young-Kee ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 522~525
In this study, an established enzyme-linked immunosorbent assay and immuno-chromatography technique are combined to fabricate an immuno-strip sensor for the detection of S. aureus. The immuno-strip is manufactured by using four different functional membranes. The capture antibody is immobilized on the nitrocellulose membrane due to the high affinity and the capillary action through porous membranes induces a flow of sample. A colorimetric signal is appeared according to the enzyme reaction and is analyzed by the digital camera (qualitative analysis) and home-made image analysis software (quantitative analysis). Under the optimal conditions, samples with S. aureus in the range of
CFU/mL can be detected by the colorimetric method within 30 min.
Absorption by Alkali-modified Amino Acid Salts
Lim, Yun-Hui ; Jo, Young-Min ; Park, Joon-Seok ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 526~531
The present study attempted to impregnate alkali metals to amino acid in order to improve
absorption capacity. A used amino acid was glycine, of which pH increased up to about 11 with the addition of alkalies.
absorption capacity of amino acid salts was evaluated in a batch and a continuous process. The absorption capacity appeared in turns as; Sodium Glycinate
Lithium Glycinate > Potassium Glycinate. Amino acid salts showed lower absolute capacity of
absorption than primary amine (Monoethanolamine) at
. In a continuous absorption with 10%
flow, the increasing the reaction temperature, the increasing rate of absorption for amino and was higher that of than amino absorbent.
Effect of Dry Surface Treatment with Ozone and Ammonia on Physico-chemical Characteristics of Dried Low Rank Coal
Choi, Changsik ; Han, Gi Bo ; Jang, Jung Hee ; Park, Jaehyeon ; Bae, Dal Hee ; Shun, Dowon ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 532~539
The physical and chemical properties of the dried low rank coals (LRCs) before and after the surface treatment using ozone and ammonia were characterized in this study. The contents of moisture, volatiles, fixed carbon and ash consisting of dried LRCs before the surface treatment were about 2.0, 44.8, 44.9 and 8.9%, respectively. Also, it was composed of carbon of 62.66%, hydrogen of 4.33%, nitrogen of 0.94%, oxygen of 27.01% and sulfur of 0.09%. The dried LRCs was surface-treated with the various dry methods using gases such as ozone at room temperature, ammonia at
and then the dried LRCs before and after the surface treatment were characterized by the various analysis methods such as FT-IR, TGA, proximate and elemental analysis, caloric value, ignition test, adsorption of
. As a result, the oxygen content increased and the calorific value, ignition temperature and the contents of carbon and hydrogen relatively decreased because the oxygen- contained functional groups were additionally generated by the surface oxidation with ozone which plays a role as an oxidant. Also, its
adsorption ability got higher because the hydrophilic oxygen-contained functional groups were additionally generated by the surface oxidation with ozone. On the other hand, it was confirmed that the dried LRCs after the surface treatment with
have the decreased oxygen content, but the increased calorific value, ignition temperature and contents of carbon and hydrogen because of the decomposition of oxygen-contained functional groups the on the surface. In addition, the
adsorption ability was lowered bucause the surface of the dried LRCs might be hydrophobicized by the loss of the hydrophilic oxygen-contained functional groups. It was concluded that the various physico-chemical properties of the dried LRCs can be changed by the surface treatment.
Flame Retardancy of Novel Phosphorus Flame Retardant for Polyurethane Foam
Kim, Chang Bum ; Seo, Won Jin ; Kwon, Oh Deok ; Kim, Sang-Bum ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 540~544
Novel phosphrous flame retardant tetramethylene bis(orthophosphorylurea) (TBPU) was synthesized by the reaction of diphosphoric acid with 1,4-butanediol and urea, and charaterized by Fourier transform infrared spectroscopy (FT-IR). As the amount of TBPU added in polyurethane foam (PUF) was increased, the flame retardancy of PUF was increased and the mechanical properties were not decreased. Also, in the flame resistance test after the reduced pressure storage, the flame retardancy of TBPU added PUF was retained. We could find out that the thermal resistance of TBPU added PUF increased compared to that of pure PUF.
Electrochemical Properties and Fabrication of Conjugated System Conducting Oligomer Self-assembled Monolayer
Min, Hyun Sik ; Lee, Tae Yeon ; Oh, Se Young ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 545~550
We have synthesized a high electrically conductive 4-(2-(4-(acetylthio)phenyl)ethynyl)benzoic acid (APBA) with a conjugated aromatic structure as a bio fix linker, and then fabricated APBA self-assembled monolayer (SAM) with a self-assembly technique. The structure of the prepared APBA SAM was studied and electrochemical properties of APBA SAM immobilized with a ferrocene molecule were investigated. Also, we have examined the molecular orientation and oxidation-reduction redox characteristics of the mixed SAM consisting of APBA and butanethiol (BT) with a X-ray photo electron spectroscopy (XPS) and cyclicvoltammetry, respectively. Electrochemical activity of the mixed SAM was increased with increasing the mixed time. Especially, the maximum redox current was obtained at a mixed time of 36 hrs.
Low-voltage Pentacene Field-Effect Transistors Based on P(S-r-BCB-r-MMA) Gate Dielectrics
Koo, Song Hee ; Russell, Thomas P. ; Hawker, Craig J. ; Ryu, Du Yeol ; Lee, Hwa Sung ; Cho, Jeong Ho ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 551~554
One of the key issues in the research of organic field-effect transistors (OFETs) is the low-voltage operation. To address this issue, we synthesized poly(styrene-r-benzocyclobutene-r-methyl methacrylate) (P(S-r-BCB-r-MMA)) as a thermally cross-linkable gate dielectrics. The P(S-r-BCB-r-MMA) showed high quality dielectric properties due to the negligible volume change during the cross-linking. The pentacene FETs based on the 34 nm-thick P(S-r-BCB-r-MMA) gate dielectrics operate below 5 V. The P(S-r-BCB-r-MMA) gate dielectrics yielded high device performance, i.e. a field-effect mobility of
, a threshold voltage of -2 V, an sub-threshold slope of 400 mV/decade, and an on/off current ratio of
. The thermally cross-linkable P(S-r-BCB-r-MMA) will provide an attractive candidate for solution-processable gate dielectrics for low-voltage OFETs.
Decomposition Characteristics of Zn-ferrite Powder Prepared by Hydrothermal and Solid State Reaction
Nam, Sung Chan ; Park, Sung Youl ; Yoon, Yeo Il ; Jeong, Soon Kwan ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 555~561
The objective of this study is the development of carbon recycle technology which converts
captured from flue gas to CO or carbon and reuse in industrial fields. Since
is very stable and difficult to decompose, metal oxide was used as an activation agent for the decomposition of
at low temperature. Metal oxides which convert
to CO or carbon at
were prepared using Zn-ferrite by the solid state reaction and hydrothermal synthesis. The behaviors of
decomposition were studied using temperature programmed reduction/oxidation (TPR/TPO) and thermogravimetric analyzer (TGA). Zn-ferrite containing 5 wt% ZnO showed the largest reduction and oxidation. Reduction by
was 26.53 wt%, oxidation by
was 25.73 wt% and 96.98% of adsorbed
was decomposed to
and carbon with excellent oxidation-reduction behaviors.
Effect of pH on Growth and Ethanol Production of Clostridium ljungdahlii
Park, So Jung ; Hong, Sung-Gu ; Kang, Kwon-Kyoo ; Kim, Young-Kee ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 562~565
In this study, we developed a bioprocess using Clostridium ljungdahlii as a biological catalyst to produce bio-ethanol, and the effect of pH on microbial growth and ethanol production was investigated. From the results of fermentation at various initial pH condition without pH control, pH of fermentation broth decreased to 4.5 within 24 h due to accumulation of by-product acetic acid and both microbial growth and ethanol production were stopped. The experimental result of initial pH 8 showed the highest microbial growth and ethanol production (0.53 g/L), since the pH drop was relatively slow. From the experiment of pH 7 maintained fermentation using pH controllable bioreactor, the maximum cell dry weight of 1.65 g/L and the maximum ethanol concentration of 1.43 g/L were obtained within 24 h. In conclusion, the C. ljungdahlii growth was enhanced by pH maintenance of neutral range, and the ethanol production was also enhanced based on the growth-associated ethanol production characteristics of C. ljungdahlii.
Comparison of Design Concepts for Four Different Entrained-Bed Coal Gasifier Types with CFD Analysis
Yun, Yongseung ; Ju, JiSun ; Lee, Seung Jong ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 566~574
Coal gasifier is a key component for achieving high efficiency in integrated gasification combined cycle and indirect coal liquefaction. Although there have been several successful coal gasifiers that were commercially proven, many different design configurations are still possible for a simple and reliable gasifier operation. Four different gasifier design concepts of dry-feeding were compared in terms of residence time, exit syngas temperature and syngas composition. First, cold-flow simulation was applied to pre-select the configuration concepts, and the hot-flow simulation including chemical reactions was performed to compare the concepts at more actual gasifier operating conditions. There are many limitations in applying CFD method in gasifier design, particularly in estimating slag behavior and slag-tap design. However, the CFD analysis proved to be useful in comparing the widely different gasifier design concepts as a pre-selection tool.
Electrochemical Determination of GABA using a 3-D Nanoporous Gold Thin Film
Pyo, Su-Hyun ; Lee, Jin-Ho ; Oh, Byeung-Keun ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 575~578
We fabricated a novel simple and rapid method of three dimensional nanoporous gold thin film (NPGF) onto a Au substrate using electrochemical deposition method. The NPGF-modified electrode analysis by scanning electron microscope and reveals the formation of nanopores, approximately 30~50 nm in diameter. differential pulse voltammetry was measured for the determination of
-aminobutiric acid in the concentration range of (
using a NPGF. The high sensitivity feature of NPGF is expected to be applied for real sample biosensor applications.
Spectroscopic Evaluation on the Chemical Damage of Hair by Hydrogen Peroxide
Ha, Byung-Jo ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 579~581
Spectroscopic evaluation of hair chemical damage was performed by SEM/EDS, CLSM, and FT-IR spectroscopy. In SEM/EDS, hydrogen peroxide treated hair showed the loose packing of surface scales, lower ratio of sulfur element and higher ratio of oxygen atom. In the optical single section by using CLSM, high fluorescent intensity appeared in untreated hair. However, in case of treated hair, low fluorescent intensity appeared. This results the aromatic amino acids which can be autofluorescent were more abundant than bleached hair. FT-IR spectra showed that cysteic acid band intensity was increased by performing the bleaching treatments. These results indicate that the oxidative damage cleaves the S-S bond and results in the lower working force of hair fiber.
In situ FT-IR Study of 1,2-dichlorobenzene Decomposition over
/Mesoporous Titania by Prepared Spray Pyrolysis
Jeon, Jong-Ki ; Jung, Kyeong Youl ; Park, Young-Kwon ;
Applied Chemistry for Engineering, volume 22, issue 5, 2011, Pages 582~585
In this study, surface-adsorbed species of 1,2-dichlorobenzene (1,2-DCB) on mesoporous
catalysts synthesized by spray pyrolysis were investigated through the adsorption/desorption performed using in situ FT-IR cell. Also, the comparison of adsorbed species with
synthesized by the incipient wetness was carried out.