Search results for: In-Yong Eom

Items from 1 to 20 out of 29 results

article

Green Synthesis and Characterization of Biologically Active Silver Nanoparticles Using Perilla frutescens Leaf Extract

Muthuraman Pandurangan, P. C. Nagajyothi, Doo Hwan Kim, Min-Ji Jung, more

Journal of Cluster Science > 2017 > 28 > 1 > 81-90

Silver nanoparticles (AgNPs) were synthesized using an aqueous Perilla leaf extract and evaluated for anticancer activity. These green -synthesized AgNPs were characterized using UV–Visible absorption spectroscopy, XRD, TEM, and SAED. The synthesized AgNPs were spherical and hexagonal in shape, and the average size of the NPs was ~23 nm. SRB assay investigated the anticancer activity of the AgNPs...

article

Green synthesis of silver nanoparticles, decorated on graphene oxide nanosheets and their catalytic activity

T.V.M. Sreekanth, Min-Ji Jung, In-Yong Eom

Applied Surface Science > 2016 > 361 > Complete > 102-106

In this study, we develop an inexpensive and green route for the synthesis of silver nanoparticles (AgNPs) using Picrasma quassioides bark aqueous extract as reducing and capping agent and also eco-friendly decorate graphene oxide (GO) nanosheets with AgNPs (GO-AgNPs). Green synthesized AgNPs and GO-AgNPs composites were characterized by UV–Visible spectroscopy, SEM-EDX, and TEM-SAED techniques. The...

article

Eco-friendly decoration of graphene oxide with green synthesized silver nanoparticles: cytotoxic activity

T. V. M. Sreekanth, Muthuraman Pandurangan, Min-Ji Jung, Yong Rok Lee, more

Research on Chemical Intermediates > 2016 > 42 > 6 > 5665-5676

The aim of the present study was to focus on the green synthesis of silver nanoparticles (AgNPs) using the aqueous extract of dried jujube fruit and the synthesized AgNPs were coated on the graphene oxide (GO + AgNPs). The AgNPs and GO + AgNPs were characterized by UV–visible spectrum, FT-IR, scanning electron microscopy, energy-dispersive spectroscopy, transmission electron microscopy, and selected...

article

Fermentative l-lactic acid production from pretreated whole slurry of oil palm trunk treated by hydrothermolysis and subsequent enzymatic hydrolysis

In-Yong Eom, Young-Hoon Oh, Si Jae Park, Seung-Hwan Lee, more

Bioresource Technology > 2015 > 185 > C > 143-149

A simple and cost-effective biochemical conversion process consisting of hydrothermal treatment, enzymatic hydrolysis and fermentation of pretreated whole slurry (PWS) was developed for producing l-lactic acid (L-LA) from oil palm trunk (OPT). When OPT was hydrothermally treated at optimal condition capable of achieving maximum yield of hemicellulosic sugars after enzymatic hydrolysis, the enzymatic...

article

Recent advances in development of biomass pretreatment technologies used in biorefinery for the production of bio-based fuels, chemicals and polymers

Young Hoon Oh, In Yong Eom, Jeong Chan Joo, Ju Hyun Yu, more

Korean Journal of Chemical Engineering > 2015 > 32 > 10 > 1945-1959

Biochemical conversion of biomass into biofuels, biochemicals, and biopolymers has attracted much interest throughout the world in terms of biorefineries. Lignocellulosic biomass is one of the most plentifully available biomass resources on the earth. It is composed of three main biopolymers - cellulose, hemicelluloses, and lignin, all of which are cross-linked to each other to resist degradation...

article

Efficient ethanol production from dried oil palm trunk treated by hydrothermolysis and subsequent enzymatic hydrolysis

In-Yong Eom, Ju-Hyun Yu, Chan-Duck Jung, Kyung-Sik Hong

Biotechnology for Biofuels > 2015 > 8 > 1 > 1-11

Background Oil palm trunk (OPT) is a valuable bioresource for the biorefinery industry producing biofuels and biochemicals. It has the distinct feature of containing a large amount of starch, which, unlike cellulose, can be easily solubilized by water when heated and hydrolyzed to glucose by amylolytic enzymes without pretreatment for breaking down the biomass recalcitrance. Therefore, it is suggested...

article

Green synthesized silver nanoparticles using Nelumbo nucifera root extract for efficient protein binding, antioxidant and cytotoxicity activities

T.V.M. Sreekanth, Sambandam Ravikumar, In-Yong Eom

Journal of Photochemistry and Photobiology B: Biology > 2014 > 141 > C > 100-105

Silver nanoparticles (AgNPs) with a mean particle size of ∼16.7nm were synthesized using an eco-friendly reducing material, aqueous Nelumbo nucifera root extract. Rapid reduction resulted in the formation of polydispersed nanoparticles. The formation of AgNPs was characterized by surface plasmon resonance, which was determined by ultraviolet–visible (UV–Vis) spectroscopy (band at 412nm), Fourier transform...

article

Development of syringe pump assisted headspace sampler

Un Jeong Go, In-Yong Eom

Journal of Chromatography A > 2014 > 1361 > Complete > 88-94

This report describes a new platform for headspace sampling technique, i.e. a syringe pump assisted headspace sampler (SPHS). The stand type pump's syringe itself was used as a sealed sample vial and a needle trap device (NTD) was adopted as a miniaturized sorbent tube. The NTD was directly used to inject trapped VOCs into a gas chromatograph. The proposed sampler was designed to take a whole headspace...

chapter

Back channel etch oxide TFT on plastic substrate for the application of high resolution TFT-LCD

Sang-Hee Ko Park, In Yong Eom, Jungho Jin, Hwea Yoon Kim, more

2014 21st International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD) > 41 - 44

2014 21st International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)

We present high performance back channel etch (BCE) oxide TFT of which overlap capacitance between source/drain and gate is minimized. With considering application to the plastic LCD, we fabricated BCE TFT under 250^oC with PECVD SiN_x/PEALD SiO₂ gate insulator and its mobility, S.S, V_th are 28.7 cm²/V.s, 0.1 V/dec, and 1.06 V, respectively. Its V_th shift under positive bias stress for 10,000 seconds...

article

Sugar yields from sunflower stalks treated by hydrothermolysis and subsequent enzymatic hydrolysis

Chan-Duck Jung, Ju-Hyun Yu, In-Yong Eom, Kyung-Sik Hong

Bioresource Technology > 2013 > 138 > Complete > 1-7

To produce fermentable sugar with fewer microbial inhibitors via few processes, batch-type hydrothermal treatments of sunflower stalks were performed, followed by enzymatic hydrolysis of pretreatment slurries with Cellic CTec2 and Cellic HTec2 (9:1, v/v, 0.1ml/g dry biomass, 8.1FPU). The yields of hemicellulosic sugars were maximized at the pretreatment condition of 180°C for 30min, while the furfural...

chapter

Superhydrophobic surface obtained using pyramidal PTFE film fabricated on RIE etched silicon

Chul-Heum Baek, Yao Litao, Sung-Bo Seo, Hwa-Min Kim, more

The 8th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems > 903 - 906

2013 8th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

We have developed a surface texturing process using a polytetrafluoroethylene coating with a pyramidal structure for obtaining superhydrophobic surfaces. In order to investigate the hydrophobic properties of the surface, we measured the contact angle and roughness values. The calculated roughness factor and root mean square roughness ranged from 2.47 to 2.6 and from 0.25 µm to 0.4 µm, respectively...

article

Comparison of pyrolytic products produced from inorganic-rich and demineralized rice straw (Oryza sativa L.) by fluidized bed pyrolyzer for future biorefinery approach

In-Yong Eom, Jae-Young Kim, Soo-Min Lee, Tae-Su Cho, more

Bioresource Technology > 2013 > 128 > Complete > 664-672

The objectives of this study were to investigate the effects of inorganic constituents on the fast pyrolysis of the biomass and to determine the yields as well as physicochemical properties of pyrolytic products. The pyrolytic products were obtained from raw and demineralized rice straw using a fluidized bed type pyrolyzer at different temperatures. As pyrolysis temperature increased, total biooil...

article

Study on the thermal decomposition features and kinetics of demineralized and inorganic metal-impregnated lignocellulosic biomass

In-Yong Eom, Jae-Young Kim, Soo-Min Lee, Tae-Su Cho, more

Journal of Industrial and Engineering Chemistry > 2012 > 18 > 6 > 2069-2075

After removing inorganic metals from poplar wood via demineralization with diverse solvents [HCl, HF, distilled water (DI-H ₂ O)], respectively, changes in decomposition characteristics, maximum decomposition rate (V _max ) and corresponding temperature (T _max ), were observed using thermo-gravimetric analysis. Activation energies calculated by differential method were ranged...

article

Characterization of pyrolytic products obtained from fast pyrolysis of chromated copper arsenate (CCA)- and alkaline copper quaternary compounds (ACQ)-treated wood biomasses

Jae-Young Kim, Tae-Sung Kim, In-Yong Eom, Sung Mo Kang, more

Journal of Hazardous Materials > 2012 > 227-228 > Complete > 445-452

In this study, chromated copper arsenate-treated wood (CCA-W) and alkaline copper quaternary compounds-treated wood (ACQ-W) were subjected to fast pyrolysis at 500°C for ca. 2s to produce bio-oil and char. The physicochemical properties of the pyrolytic products as well as the distribution of heavy metals – arsenic, copper and chrome – during fast pyrolysis were investigated. The water content, viscosity,...

article

Simultaneous sampling and analysis of indoor air infested with Cimex lectularius L. (Hemiptera: Cimicidae) by solid phase microextraction, thin film microextraction and needle trap device

In-Yong Eom, Sanja Risticevic, Janusz Pawliszyn

Analytica Chimica Acta > 2012 > 716 > Complete > 2-10

Air in a room infested by Cimex lectularius L. (Hemiptera: Cimicidae) was sampled simultaneously by three different sampling devices including solid phase microextraction (SPME) fiber coatings, thin film microextraction (TFME) devices, and needle trap devices (NTDs) and then analyzed by gas chromatography–mass spectrometry (GC–MS). The main focus of this study was to fully characterize indoor air...

article

Effect of essential inorganic metals on primary thermal degradation of lignocellulosic biomass

In-Yong Eom, Jae-Young Kim, Tae-Seung Kim, Soo-Min Lee, more

Bioresource Technology > 2012 > 104 > Complete > 687-694

This study employed thermogravimetric analysis (TGA) and analytical Py-GC/MS in order to examine the catalytic effect of main inorganic metals (K, Mg and Ca) on the thermal degradation and the formation of pyrolytic products in lignocellulosic biomass. In addition, potential mechanisms of the primary pyrolysis in presence of the inorganic metals were derived. TG analysis showed that when potassium...

article

Structural features of lignin macromolecules extracted with ionic liquid from poplar wood

Jae-Young Kim, Eun-Jin Shin, In-Yong Eom, Keehoon Won, more

Bioresource Technology > 2011 > 102 > 19 > 9020-9025

1-Ethyl-3-methylimidazolium acetate ([Emim][CH ₃ COO]) was used for the extraction of lignin from poplar wood (Populus albaglandulosa), which was called to ionic liquid lignin (ILL) and structural features of ILL were compared with the corresponding milled wood lignin (MWL). Yields of ILL and MWL were 5.8±0.3% and 4.4±0.4%, respectively. The maximum decomposition rate (V _M ) and temperature...

article

Investigation of physicochemical properties of biooils produced from yellow poplar wood (Liriodendron tulipifera) at various temperatures and residence times

Kwang Ho Kim, In Yong Eom, Soo Min Lee, Donha Choi, more

Journal of Analytical and Applied Pyrolysis > 2011 > 92 > 1 > 2-9

Fast pyrolysis of yellow poplar wood (Liriodendron tulipifera) was performed under different temperature ranges and residence times in a fluidized bed reactor to maximize the yield of biooil. In this study, the pyrolysis temperature ranged from 400°C to 550°C, and the residence time of pyrolysis products was controlled between 1.2 and 7.7s by inert nitrogen gas flow. The results revealed that the...

article

Characterization of lignin-rich residues remaining after continuous super-critical water hydrolysis of poplar wood (Populus albaglandulosa) for conversion to fermentable sugars

Sun-Joo Moon, In-Yong Eom, Jae-Young Kim, Tae-Seung Kim, more

Bioresource Technology > 2011 > 102 > 10 > 5912-5916

Poplar wood flour (Populous albaglandulosa) was treated with sub- and super-critical water (subcritical: 325, 350°C; super-critical: 380, 400, 425°C) for 60s at 220±10atm. Hydrochloric acid (0.05%v/v) was added to samples as acidic catalyst. The final products were separated into water soluble fraction and undegraded solids. The yields of undegraded solids were thoroughly dependent on temperature...

article

Characterization of primary thermal degradation features of lignocellulosic biomass after removal of inorganic metals by diverse solvents

In-Yong Eom, Kwang-Ho Kim, Jae-Young Kim, Soo-Min Lee, more

Bioresource Technology > 2011 > 102 > 3 > 3437-3444

Poplar wood powders were treated with distilled water, tap water, HCl and HF, respectively, to remove inorganics from the biomass and to investigate effect of demineralization processes on pyrolysis behavior of the biomass. TG and DTG revealed that maximum degradation temperatures rose slightly from 362°C for control to 372°C, 366°C and 368°C after demineralization with distilled water, HCl and HF,...

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Search results for: In-Yong Eom

Green Synthesis and Characterization of Biologically Active Silver Nanoparticles Using Perilla frutescens Leaf Extract

Green synthesis of silver nanoparticles, decorated on graphene oxide nanosheets and their catalytic activity

Eco-friendly decoration of graphene oxide with green synthesized silver nanoparticles: cytotoxic activity

Fermentative l-lactic acid production from pretreated whole slurry of oil palm trunk treated by hydrothermolysis and subsequent enzymatic hydrolysis

Recent advances in development of biomass pretreatment technologies used in biorefinery for the production of bio-based fuels, chemicals and polymers

Efficient ethanol production from dried oil palm trunk treated by hydrothermolysis and subsequent enzymatic hydrolysis

Green synthesized silver nanoparticles using Nelumbo nucifera root extract for efficient protein binding, antioxidant and cytotoxicity activities

Development of syringe pump assisted headspace sampler

Back channel etch oxide TFT on plastic substrate for the application of high resolution TFT-LCD

Sugar yields from sunflower stalks treated by hydrothermolysis and subsequent enzymatic hydrolysis

Superhydrophobic surface obtained using pyramidal PTFE film fabricated on RIE etched silicon

Comparison of pyrolytic products produced from inorganic-rich and demineralized rice straw (Oryza sativa L.) by fluidized bed pyrolyzer for future biorefinery approach

Study on the thermal decomposition features and kinetics of demineralized and inorganic metal-impregnated lignocellulosic biomass

Characterization of pyrolytic products obtained from fast pyrolysis of chromated copper arsenate (CCA)- and alkaline copper quaternary compounds (ACQ)-treated wood biomasses

Simultaneous sampling and analysis of indoor air infested with Cimex lectularius L. (Hemiptera: Cimicidae) by solid phase microextraction, thin film microextraction and needle trap device

Effect of essential inorganic metals on primary thermal degradation of lignocellulosic biomass

Structural features of lignin macromolecules extracted with ionic liquid from poplar wood

Investigation of physicochemical properties of biooils produced from yellow poplar wood (Liriodendron tulipifera) at various temperatures and residence times

Characterization of lignin-rich residues remaining after continuous super-critical water hydrolysis of poplar wood (Populus albaglandulosa) for conversion to fermentable sugars

Characterization of primary thermal degradation features of lignocellulosic biomass after removal of inorganic metals by diverse solvents

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