A5075446239- Mesoporous Materials and Catalysis
- Water Quality Monitoring and Analysis
- Hydraulic flow and structures
- Fluid Dynamics and Mixing
- Zeolite Catalysis and Synthesis
- Engineering Applied Research
- Water Treatment and Disinfection
- Environmental and Sediment Control
- Marine and coastal ecosystems
- Reproductive Biology and Fertility
- Water Quality Monitoring Technologies
- Hydrology and Watershed Management Studies
- Aerosol Filtration and Electrostatic Precipitation
- Cyclone Separators and Fluid Dynamics
- Water Systems and Optimization
- Flow Measurement and Analysis
- Hydrological Forecasting Using AI
- Wastewater Treatment and Nitrogen Removal
- Sperm and Testicular Function
- Polyoxometalates: Synthesis and Applications
- Advancements in Photolithography Techniques
- Electron and X-Ray Spectroscopy Techniques
- Ovarian function and disorders
- Methane Hydrates and Related Phenomena
- Advanced Sensor and Energy Harvesting Materials
Incheon National University
2018-2021
Korea Fisheries Resources Agency
2010-2021
Gyeongsang National University
2013-2021
Korea Advanced Institute of Science and Technology
2021
Asan Medical Center
2018-2019
University of Ulsan
2007-2019
Ulsan College
2017-2019
Gangneung Asan Hospital
2007-2019
Water Research Institute
2017
Kyungpook National University
1994-2015
Colloid-imprinted carbons (CIC) with average pore sizes of 12, 22, 45, and 85 nm have been used as templates for the nanocasting ZSM-5 zeolite spherical domain comparable to CIC template. The size shape fidelity CIC-nanocasted allows one control both external surface area (16−127 m2/g) interparticle mesopore volume (0.05−1.19 cm3/g) through a rational choice template size. This flexibility in tailoring particle textural properties makes it possible optimize catalytic conversion molecules...
Abstract. Since the start of industrial revolution, human activities have caused a rapid increase in atmospheric carbon dioxide (CO2) concentrations, which have, turn, had an impact on climate leading to global warming and ocean acidification. Various approaches been proposed reduce CO2. The Martin (or iron) hypothesis suggests that iron fertilization (OIF) could be effective method for stimulating oceanic sequestration through biological pump iron-limited, high-nutrient, low-chlorophyll...
Very large pore hexagonal and cellular foam-like molecular sieve silicas with well cross-linked framework walls (denoted MSU-H MSU-F, respectively), have been prepared from soluble silicate precursors under neutral pH conditions.
A mesoporous carbon molecular sieve with a hexagonal framework structure (denoted C-MSU-H) has been prepared using MSU-H silica template that can be assembled from low cost soluble silicate precursor at near-neutral pH conditions.
Thermally stable mesoporous silica molecular sieves with wormhole framework structures, previously obtainable only from silicon alkoxides, have been prepared low cost soluble silicate precursors in the presence of non-ionic surfactants as structure directors.
Jinhae Bay, one of the most important aquaculture areas in Korean coastal waters, has suffered from serious environmental problems due to intensive anthropogenic activities since 1970s. Determining response ecosystems Korea requires understanding characteristics chlorophyll-a concentration (Chl-a), and high spatiotemporal resolution Geostationary Ocean Color Imager (GOCI) can aid these efforts. However, producing reliable satellite-based Chl-a estimates is challenging optically complex...
This study investigated the production of high-performance biochar from swine manure using a sequential carbonization process combining hydrothermal (HTC) and pyrolysis. Biochar produced through HCl-assisted exhibited superior properties, including highest fixed carbon (70.0%), higher heating value (28.48 MJ/kg, ~18.8% increase over HTC-Py), BET surface area (279.66 m2/g, ~17 times than other biochars). These improvements were attributed to catalytic role HCl in promoting dehydration,...
Chicken manure (CM) is a nutrient-rich but environmentally problematic biomass that requires sustainable management. This study applied three-step process consisting of hydrothermal activation (ZnCl2 or H3PO4), catalytic carbonization (HCl FeCl3), and low-temperature pyrolysis (250 °C) to develop an energy-efficient method for producing biochar. The resulting biochars were systematically analyzed their physicochemical properties, heavy metal content, carbon sequestration potential, compared...
Hydrolytically stable mesostructured aluminosilicates assembled from protozeolitic precursors are examined as acid catalysts in the isobutene oligomerization reaction. Steady state conversions high 80% at 60 °C achieved, depending on isobutene:butane feed composition and space velocity. Most notably, product selectivity to dimeric C8= trimeric C12= olefins is readily fine-tuned simply by changing composition. Undesirable molecular weight oligomers not produced any case. The superior...
High-Performance Liquid Chromatograph(HPLC)를 이용하여 식물플랑크톤의 광합성색소를 분석한 결과를 토대로 CHEMTAX 프로그램을 식물플랑크톤 군집조성을 추정하는 방법이 많이 이용되고 있다. 프로그램은 군집별(class level)로 체내에 존재하는 주요색소의 chlorophyll a에 대한 상대적인 비 값을 기초로 분석을 한다 본 연구는 국내 해역에서 분리한 군집별 주요 종들이 가지는 광합성색소의 파악하고 이 자료를 남해안에 위치한 여자만과 가막만에서 측정한 광합성색소 분석결과에 대해서 파악하였다. 국내해역에 같은 군집종들 사이에서도 값은 차이를 보였으며, 국외의 다른 제시된 값과도 상당한 보였다. 연구에서 얻은 결과, 결과와 유의한 우점하는 군집(bacillariophyceae와 dinophytes)에 대해서는 5% 이내에서 비록 낮은 기여도를 보이지만 pico와 nano 크기의 군집들(cyanophytes와 prasinophytes)에서는...
The cell and window diameters of silica foams can be easily increased by as much 18 nm through a simple postsynthesis hydrothermal treatment, indicating that the framework remains labile responsive to temperature dependence microemulsion droplet size within cells. This makes it especially convenient transform closed-cell foam into an open-cell structure without changing porogen.
The in-situ graphitization of an as-made, large pore silica mesostructure templated by nonionic Pluronic 123 surfactant micelles provides a low cost pathway to the nanocasting linear carbon nanotubes.
Abstract The western Arctic Ocean is experiencing some of the most rapid environmental changes in Arctic. However, little known about microbial community response to these changes. Employing observations from summer 2017, this study investigated latitudinal variations bacterial composition surface waters between Bering Strait and Chukchi Borderland factors driving Results indicate three distinctive communities. Southern communities are associated with nutrient rich conditions, including...
Oysters are a major commercial and ecological fishery resource. Recently, the oyster industry has experienced mass mortality in summer due to environmental factors. Generally, survival of oysters aquatic environments is mainly impacted by stressors such as elevated sea temperatures reduced salinity; however, impacting tidal flat that repeatedly exposed air remain poorly understood. Hence, we studied relationship between factors pacific Incheon, South Korea, where common. Principal component...
Silica mesostructures with well-expressed hexagonal and wormhole framework structures up to 50% organo-functionalization of the silicon sites have been directly assembled from sodium silicate.
Purpose: Nasal packing is an option for bleeding control after endoscopic sinus surgery and septoplasty. Although new materials have been developed, patients still suffer from pain require additional analgesics treatments. In this study, a prospective, randomized, double-blind controlled trial was designed to evaluate the effect of fentanyl-soaked on Methods: One hundred fifty-two who underwent nasal surgeries due chronic rhinosinusitis or septal deviation were enrolled in study. At end...
탄소섬유 강화 복합재료는 높은 비강도 및 비강성을 가지기 때문에 자동차 산업, 선박, 우주 항공 산업과 같은 다양한 산업 분야에 적용되어 왔으며, 수요가 점차 증가하고 있다. 복합재료에는 기지재로 주로 에폭시(Epoxy)와 같이 점도가 낮고 젖음 특성이 우수하며 강도가 양호한 열경화성(Thermosetting) 수지가 사용된다. 열경화성 수지는 우수한 물리적 특성을 나타내지만 재사용이 어렵다. 이러한 문제를 해결하기 위하여 가능한 열가소성 수지(Thermoplastic) 복합재료 개발 재사용에 관한 많은 연구들이 진행되고 본 연구에서는 열분해 방법을 사용하여 탄소섬유/에폭시 복합재료로부터 탄소섬유와 수지를 분리하여 탄소섬유를 재활용하였다. 에폭시의 분해도(Degree of decomposition)는 열중량분석기(TGA)와 시차 주사현미경(SEM)을 통해 확인하였다. 수지로부터 분리해낸 탄소섬유는 절단(Cutting)과 그라인딩(Grinding) 거쳐 시트(Sheet)를...