Hyun-Joo Han

Publications10
h-index4
Citations154
Highly Influential Citations0
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Reinterpretation of curved Hammett plots in reaction of nucleophiles with aryl benzoates: change in rate-determining step or mechanism versus ground-state stabilization.
A kinetic study is reported for the reaction of the anionic nucleophiles OH-, CN-, and N 3 - with aryl benzoates containing substituents on the benzoyl as well as the aryloxy moiety, in 80 mol % H2O… Expand
  • 69
Aminolysis of 4-nitrophenyl phenyl carbonate and thionocarbonate: effects of amine nature and modification of electrophilic center from C[double bond]O to C[double bond]S on reactivity and mechanism.
A kinetic study is reported for the reactions of 4-nitrophenyl phenyl carbonate (5) and thionocarbonate (6) with a series of alicyclic secondary amines in 80 mol% H(2)O-20 mol% DMSO at 25.0 +/- 0.1… Expand
  • 48
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Effect of changing electrophilic center from C=O to C=S on rates and mechanism: pyridinolyses of O-2,4-dinitrophenyl thionobenzoate and its oxygen analogue.
Second-order rate constants have been measured spectrophotometrically for the reactions of O-2,4-dinitrophenyl thionobenzoate (1) and 2,4-dinitrophenyl benzoate (2) with a series of substituted… Expand
  • 28
Effect of amine nature on rates and mechanism: Pyridinolyses of 4-nitrophenyl benzoate
Pseudo-first-order rate constants (k o b s ) have been measured spectrophotometrically for the reactions of 4-nitrophenyl benzoate with a series of pyridines in H 2 O containing 20 mol % DMSO. The… Expand
  • 4
Kinetics and Mechanism of Azidolysis of Y-Substituted Phenyl Benzoates
Second-order rate constants (k N ) have been measured spectrophotometrically for reactions of Y-substituted phenyl benzoates (la-h) with azide ion (N 3 - ) in 80 mol % H 2 O/20 mol % DMSO at 25.0 ±… Expand
  • 1
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The Effect and Safety of Dapagliflozin in Patients with Type 2 Diabetes: A Single-Institution Pharmacovigilance Review
Background: Dapagliflozin, a selective sodium-glucose co-transporter 2 (SGLT2) inhibitor, lowers blood glucose by reducing glucose reabsorption at the proximal renal tubule in an insulin-independent… Expand
Design, Fabrication and Performance Analysis of Fiber Optic Concentrators for Daylighting
Evaluation of Peri-procedural Warfarin Therapy Undergoing Cardioversion in Patients with Atrial fibrillation
Evaluation of Peri-procedural Warfarin Therapy Undergoing Cardioversion in Patients with Atrial fibrillation Jung-Yeon Moon*, Bo-Ram Kim, Eun-Jung Jo, Yoon-Sook Cho, Hyun-Joo Han, and Eue-Keun Choi… Expand
Experimental Evaluation of a Fiber Optic Concentrator for Daylighting
A series of outdoor tests were conducted on a fiber optic solar concentrator system for its performance on daylighting. The system is comprised of four main components - a parabolic dish reflector, a… Expand
  • 1
The effect of acyl substituents on the α-effect: contrasting α-effect profiles for reactions of 4-nitrophenyl substituted benzoates with neutral and anionic nucleophiles
Abstract The magnitude of the α-effect for reactions of 4-nitrophenyl substituted benzoates with a pair of anionic nucleophiles is independent of the electronic nature of the acyl substituent, while… Expand
  • 3