Chang Ho Oh
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View article: Synthesis of sildenafil and its derivatives bearing pyrazolo‐pyrimidinones scaffold
Synthesis of sildenafil and its derivatives bearing pyrazolo‐pyrimidinones scaffold Open
The pyrazole ring structure is extensively spotted as a pharmacophore and fortify‐cation of the modern organic synthesis toolbox, which demands synthetic tactics to generate its derivatives. Especially, pyrazolo‐pyrimidinones are crucial p…
View article: CCDC 2249885: Experimental Crystal Structure Determination
CCDC 2249885: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2249884: Experimental Crystal Structure Determination
CCDC 2249884: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Access toward steroid skeleton and its derivatives via copper‐catalyzed intramolecular cyclization: A short synthesis of estradiol and estrone
Access toward steroid skeleton and its derivatives via copper‐catalyzed intramolecular cyclization: A short synthesis of estradiol and estrone Open
A practical and efficient approach leading to [6,6,6,5] tetracyclic fused ring steroid skeletons ( 8 a – i ) has been designed through copper catalyzed intramolecular [4+2] cycloaddition reaction of enyne‐carbonyl substrates ( 7 a – i ). T…
View article: Methods and systems for the production of hydrogen
Methods and systems for the production of hydrogen Open
Methods and systems are disclosed for the production of hydrogen and the use of high-temperature heat sources in energy conversion. In one embodiment, a primary loop may include a nuclear reactor utilizing a molten salt or helium as a cool…
View article: Current Boosting of Self‐Aligned Top‐Gate Amorphous InGaZnO Thin‐Film Transistors under Driving Conditions
Current Boosting of Self‐Aligned Top‐Gate Amorphous InGaZnO Thin‐Film Transistors under Driving Conditions Open
Oxide semiconductor transistors control the brightness and color of organic light‐emitting diode (OLED) displays in large‐screen televisions to portable telecommunications devices. Oxide semiconductor thin‐film transistors under driving co…
View article: CCDC 2035343: Experimental Crystal Structure Determination
CCDC 2035343: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: A high image quality organic light‐emitting diode display with motion blur reduction for ultrahigh resolution and premium TVs
A high image quality organic light‐emitting diode display with motion blur reduction for ultrahigh resolution and premium TVs Open
In this paper, we present a high image quality organic light‐emitting diode (OLED) display with motion blur reduction technology. Our latest work includes driving method that reduces motion blur using an adaptive black data insertion, brig…
View article: Synthesis of pyrazolopyrimidinones as sildenafil derivatives and sclerotigenin
Synthesis of pyrazolopyrimidinones as sildenafil derivatives and sclerotigenin Open
A series of novel pyrazolo pyrimidinone derivatives (3(a–d), 4(a–d), and 6(a–d)) was synthesized from various pyrazolo amides (2a–d) which are synthesized by the reaction between ethyl 5-amino-3-methyl-1-phenyl-1H-pyrazole-4-carboxylate (1…
View article: Copper-catalyzed tandem reaction of 2-alkynylanilines with benzoquinones: efficient access to 3-indolylquinones
Copper-catalyzed tandem reaction of 2-alkynylanilines with benzoquinones: efficient access to 3-indolylquinones Open
Copper-catalyzed domino cyclization of 2-alkynylanilines followed by C–C bond formation with quinones is an efficient method of accessing 3-indolyl quinones.
View article: CCDC 1844842: Experimental Crystal Structure Determination
CCDC 1844842: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: TRITIUM PERMEATION AND TRANSPORT IN THE GASOLINE PRODUCTION SYSTEM COUPLED WITH HIGH TEMPERATURE GAS-COOLED REACTORS (HTGRS)
TRITIUM PERMEATION AND TRANSPORT IN THE GASOLINE PRODUCTION SYSTEM COUPLED WITH HIGH TEMPERATURE GAS-COOLED REACTORS (HTGRS) Open
This paper describes scoping analyses on tritium behaviors in the HTGR-integrated gasoline production system, which is based on a methanol-to-gasoline (MTG) plant. In this system, the HTGR transfers heat and electricity to the MTG system. …
View article: STUDY ON AIR INGRESS MITIGATION METHODS IN THE VERY HIGH TEMPERATURE GAS COOLED REACTOR (VHTR)
STUDY ON AIR INGRESS MITIGATION METHODS IN THE VERY HIGH TEMPERATURE GAS COOLED REACTOR (VHTR) Open
An air-ingress accident followed by a pipe break is considered as a critical event for a very high temperature gas-cooled reactor (VHTR). Following helium depressurization, it is anticipated that unless countermeasures are taken, air will …
View article: Intermediate Heat Transfer Loop Study for High Temperature Gas-Cooled Reactor
Intermediate Heat Transfer Loop Study for High Temperature Gas-Cooled Reactor Open
A number of possible configurations for a system that transfers heat between the nuclear reactor and the hydrogen and/or electrical generation plants were identified. These configurations included both direct and indirect cycles for the pr…
View article: Power Conversion Study for High Temperature Gas-Cooled Reactors
Power Conversion Study for High Temperature Gas-Cooled Reactors Open
The Idaho National Laboratory (INL) is investigating a Brayton cycle efficiency improvement on a high temperature gas-cooled reactor (HTGR) as part of Generation-IV nuclear engineering research initiative. There are some technical issues t…
View article: Estimation of Graphite Density and mechanical Strength of VHTR during Air-Ingress Accident
Estimation of Graphite Density and mechanical Strength of VHTR during Air-Ingress Accident Open
An air-ingress accident in a VHTR is anticipated to cause severe changes of graphite density and mechanical strength by oxidation process resulting in many side effects. However, the quantitative estimation has not been performed yet. In t…
View article: Air Ingress Analyses on a High Temperature Gas-Cooled Reactor
Air Ingress Analyses on a High Temperature Gas-Cooled Reactor Open
A primary-pipe break accident is one of the design-basis accidents of a high-temperature gas-cooled reactor (HTGR). When this accident occurs, air is anticipated to enter the reactor core from the break and oxidize the in-core graphite str…
View article: Analysis on the Density Driven Air-Ingress Accident in VHTRs
Analysis on the Density Driven Air-Ingress Accident in VHTRs Open
Air-ingress following the pipe rupture is considered to be the most serious accident in the VHTRs due to its potential problems such as core heat-up, structural integrity and toxic gas release. Previously, it has been believed that the mai…
View article: Development of Tritium Permeation Analysis Code and Tritium Transport in a High Temperature Gas-Cooled Reactor Coupled with Hydrogen Production System
Development of Tritium Permeation Analysis Code and Tritium Transport in a High Temperature Gas-Cooled Reactor Coupled with Hydrogen Production System Open
– A tritium permeation analyses code (TPAC) was developed by Idaho National Laboratory for the purpose of analyzing tritium distributions in very high temperature reactor (VHTR) systems, including integrated hydrogen production systems. A …