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The rate-determining step in the dark state recovery process in the photocycle of PYP
Sasaki. Jun, Kumauchi. Masato, Hamada. Norio, Tokunaga. Fumio 한국광과학회 Journal of photoscience: an international journal officail organ of the Korean Society of Photoscien 4 Pages
한국광과학회 Journal of photoscience: an international journal officail organ of the Korean Society of Photoscien 2002, Vol.9 No.2 130-133 (4 pages)
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Effect of Nonleaving Group on the Reaction Rate and Mechanism: Aminolyses of 4-Nitrophenyl Acetate, Benzoate and Phenyl Carbonate
Um. Ik-Hwan, Park. Hye-Ran, Kim. Eun-Young 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2003, Vol.24 No.9 1251-1255 (5 pages)
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Nucleophilic Substitution Reactions of Phenyl Y-Substituted-Phenyl Carbonates with Butane-2,3-dione Monoximate and 4-Chlorophenoxide: Origin of the α-Effect
Kim. Min-Young, Min. Se-Won, Um. Ik-Hwan 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2013, Vol.34 No.1 49-53 (5 pages)
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Kinetic Study on Nucleophilic Displacement Reactions of Y-Substituted-Phenyl 2-Methylbenzoates with Cyclic Secondary Amines in Acetonitrile: Effects of Modification of 2-MeO in Benzoyl Moiety by 2-Me on Reactivity and Reaction Mechanism
Lee. Ji-Youn, Kim. Mi-Yeon, Um. Ik-Hwan 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2013, Vol.34 No.12 3795-3799 (5 pages)
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Kinetic Study on Aminolysis of 4-Pyridyl X-Substituted Benzoates: Effect of Substituent X on Reactivity and Reaction Mechanism
Lee. Jong-Pal, Bae. Ae-Ri, Um. Ik-Hwan 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2011, Vol.32 No.6 1907-1911 (5 pages)
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Pyridinolysis of 2,4-Dinitrophenyl Phenyl Thionocarbonate: Effect of Changing Electrophilic Center from C=O to C=S on Reactivity and Mechanism
Son. Min-Ji, Kim. Song-I, Um. Ik-Hwan 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2011, Vol.32 No.4 1165-1169 (5 pages)
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Kinetic and Theoretical Studies on Pyridinolysis of 2,4-Dinitrophenyl X-Substituted Benzoates: Effect of Substituent X on Reactivity and Mechanism
Um. Ik-Hwan, Kim. Eun-Hee, Im. Li-Ra, Mishima. Masaaki 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2010, Vol.31 No.9 2593-2597 (5 pages)
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Pyridinolyses of 2,4-Dinitrophenyl Phenyl Carbonate and 2,4-Dinitrophenyl Benzoate: Effect of Nonleaving Group on Reactivity and Mechanism
Um. Ik-Hwan, Son. Min-Ji, Kim. Song-I, Akhtar. Kalsoom 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2010, Vol.31 No.7 1915-1919 (5 pages)
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A Kinetic Study on Aminolysis of 2-Pyridyl X-Substituted Benzoates: Effect of Changing Leaving Group from 4-Nitrophenolate to 2-Pyridinolate on Reactivity and Mechanism
Lee. Jong-Pal, Bae. Ae-Ri, Im. Li-Ra, Um. Ik-Hwan 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2010, Vol.31 No.12 3588-3592 (5 pages)
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Kinetics and Mechanism of Michael-type Reactions of Ethyl Propiolate with Alicyclic Secondary Amines in H2O and MeCN: Solvent Effect on Reactivity and Transition-State Structure
Kim. Song-I, Baek. Hye-Won, Um. Ik-Hwan 대한화학회 Bulletin of the Korean Chemical Society 4 Pages
대한화학회 Bulletin of the Korean Chemical Society 2009, Vol.30 No.12 2909-2912 (4 pages)
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Aminolysis of 2,4-Dinitrophenyl 2-Furoate and 2-Thiophenecarboxylate: Effect of Modification of Nonleaving Group from Furoyl to Thiophenecarbonyl on Reactivity and Mechanism
Um. Ik-Hwan, Min. Se-Won, Chuna. Sun-Mee 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2008, Vol.29 No.7 1359-1363 (5 pages)
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Aminolysis of Y-Substituted Phenyl 2-Thiophenecarboxylates and 2-Furoates: Effect of Modification of Nonleaving Group from 2-Furoyl to 2-Thiophenecarbonyl on Reactivity and Mechanism
Um. Ik-Hwan, Min. Se-Won 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2008, Vol.29 No.3 585-589 (5 pages)
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Aminolyses of Y-substituted Phenyl 2-Furoates and Cinnamates: Effect of Nonleaving Group Substituent on Reactivity and Mechanism
Um. Ik-Hwan, Akhtar. Kalsoom, Park. Youn-Min, Khan. Sher Bahadar 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2007, Vol.28 No.8 1353-1357 (5 pages)
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Secondary Growth of Sodium Type Faujasite Zeolite Layers on a Porous $alpha-Al_2O_3$ Tube and the $CO_2/N_2$ Separation
조철희, 여정구, 안영수, 한문희, 김용하, 현상훈, Cho. Churl-Hee, Yeo. Jeong-Gu, Ahn. Young-Soo, Han. Moon-Hee, Kim. Yong-Ha, Hyun. Sang-Hoon 한국막학회 멤브레인 15 Pages
한국막학회 멤브레인 2007, Vol.17 No.3 254-268 (15 pages)
양은 형성된 제올라이트 분리층의 재료특성에 가장 큰 영향을 주는 변수임을 확인하였다. 즉, 수열용액 내의 $SiO_2$ 양이 증가함에 따라서 형성된 제올라이트 분리층의 Si/Al 몰비, 두께, 구조적 불완전성(discontinuity)은 동시에 증가하였다. 본 논문에서는 불완전한 치밀화에 의해 잔존하는 결정립간 공극(void), GIS Na-P1 상에 의해 형성된 균열(crack) 등 구조적 불완전성이 $CO_2/N_2$ 분리에 가장 큰 영향을 주는 재료특성이며, 투과부에서의 $CO_2$ 탈착이 전체 $CO_2$ 투과의 율속단계(rate-determining step)임을 확인하였다. -
Agmatine protection against chlorpromazine-induced forebrain cortex injury in rats
Bratislav Dejanovic, Ivana Stevanovic, Milica Ninkovic, Ivana Stojanovic, Irena Lavrnja, Tatjana Radicevic, Milos Pavlovic 대한수의학회 Journal of Veterinary Science 9 Pages
대한수의학회 Journal of Veterinary Science 2016, 제 17권 제 1호 7 53-61 (9 pages)
This study was conducted to investigate whether agmatine (AGM) provides protection against oxidative stress induced by treatment with chlorpromazine (CPZ) in Wistar rats. In addition, the role of reactive oxygen species and efficiency of antioxidant protection in the brain homogenates of forebrain cortexes prepared 48 h after treatment were investigated. Chlorpromazine was applied intraperitoneally (i.p.) in single dose of 38.7 mg/kg body weight (BW) The second group was treated with both CPZ... -
Comparative evaluation of phenobarbital-induced CYP3A and CYP2H1 gene expression by quantitative RT-PCR in Bantam, Bantamized White Leghorn and White Leghorn chicks
Harshad V. Goriya, Anil Kalia, Shailesh K. Bhavsar, Chaitanya G. Joshi, Dharamshibhai N. Rank, Aswin M. Thaker 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2005, 제 6권 제 4호 3 279-285 (7 pages)
with phenobarbital at the dose rate of 12 mg/100 g (body weight) while the control group was treated with the saline. Total RNA was extracted from the liver samples using Tri Reagent based method. First strand cDNA was synthesized using one step RT-PCR kit. The PCR was performed and the product was subjected to agarose gel electrophoresis. Quantitative RT-PCR was conducted to quantify gene expression level of CYP3A and CYP2H1 genes. Relative expression ratio of CYP3A and CYP2H1 genes was... -
Taxifolin Glycoside Blocks Human ether-a-go-go Related Gene K+ Channels
JihyunYun, HyemiBae, SunEunChoi, Jung-HaKim, YoungWookChoi6, InjaLim, ChungSooLee, MinWonLee, Jae-HongKo, SeongJunSeo, HyoweonBang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.1 6 37-42 (6 pages)
Taxifolin glycoside is a new drug candidate for the treatment of atopic dermatitis (AD). Many drugs cause side effects such as long QT syndrome by blocking the human ether-a-go-go related gene (hERG) K+ channels. To determine whether taxifolin glycoside would block hERG K+ channels, we recorded hERG K+ currents using a whole-cell patch clamp technique. We found that taxifolin glycoside directly blocked hERG K+ current in a concentration-dependent manner (EC50=9.6±0.7ՌM). The activation... -
Stretch-activated K+ Channels in Rat Atrial Myocytes
JaeBoumYoum 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.6 8 341-318 (8 pages)
Mechanical stimuli to the cardiac myocytes initiate many biochemical and physiological events. Stretch-activated cation channels have been suggested to mediate these events. In this study, cell-attached and inside-out excised-patch clamp methods were used to identify stretch-activated cation channels in adult rat atrial myocytes. Channel openings were increased in cell-attached configuration when negative pressure was applied to the pipette, and also in inside-out excised patches by negative... -
Tissue-Specific Regulation of Angiotensinogen and Angiotensin II Receptor Gene Expression in Deoxycorticosterone Acetate-Salt Hypertensive Rats
JongUnLeeMiRaAn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.3 9 315-320 (6 pages)
Molecular regulation of the renin-angiotensin system (RAS) was investigated in deoxycorticosterone acetate (DOCA)-salt hypertension. The expression of renin, angiotensinogen and angiotensin II receptor genes in the kidney and liver was determined by Northern blot analysis in rats which were made DOCA-salt hypertensive over the period of 2 or 4 weeks. Along with the hypertension, renin mRNA was decreased in the remnant kidney. The expression of angiotensinogen gene was not significantly altered... -
Thiobenzamide S-oxidation in Perfused Rat Liver Ex Vivo Determination of Hepatic Flavin-Containing Monooxygenase Activity
Woon-GyeChung, Hyung-KeunRoh, Young-NamCha 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.5 15 591-595 (5 pages)
An ex vivo assay determining the flavin-containing monooxygenase (FMO) activity in perfused rat liver has been developed by assessing the rate of thiobenzamide S-oxide (TBSO) formation from the infused thiobenzamide (TB). The hepatotoxicity by TB or TBSO was not a critical factor for maintaining the FMO activity for up to 50 min. The FMO activity expressed in nmoles TBSO produced/g liver/min was the same for the recycling and non-recycling perfusion. This implies that reduction of the oxidized... -
Stress Tolerance and Virulence-Related Roles of Lipopolysaccharide in Burkholderia glumae
Chaeyeong Lee, Mohamed Mannaa, Namgyu Kim, Juyun Kim, Yeounju Choi, Soo Hyun Kim, Boknam Jung, Hyun-Hee Lee, Jungkwan Lee, Young-Su Seo 한국식물병리학회 The Plant Pathology Journal 14 Pages
한국식물병리학회 The Plant Pathology Journal 2019, 35권 5호 6 445-458 (14 pages)
operon, were not significantly different from the wild-type except in slight decrease in swimming and swarming motility with wbiH deletion. Altogether, the results of present study indicated that the LPS, particularly the core OS region, is required for tolerance to environmental stress and full virulence in B. glumae. To our knowledge, this is the first functional study of LPS in a plant pathogenic Burkholderia sp. and presents a step forward toward full understanding of B. glumae pathogenesis. -
Sorption behavior of slightly reduced, three-dimensionally macroporous graphene oxides for physical loading of oils and organic solvents
Ho Seok Park, Sung Oong Kang 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.18 4 24-29 (6 pages)
High pollutant-loading capacities (up to 319 times its own weight) are achieved by three-dimensional (3D) macroporous, slightly reduced graphene oxide (srGO) sorbents, which are prepared through ice-templating and consecutive thermal reduction. The reduction of the srGO is readily controlled by heating time under a mild condition (at 1 10?2 Torr and 200°C). The saturated sorption capacity of the hydrophilic srGO sorbent (thermally reduced for 1 h) could not be improved further even though the... -
Influence of hot-pressing pressure on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon composite
Thakur Sudesh Kumar Raunija and Sharad Chandra Sharma 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.1 4 25-33 (9 pages)
The prime objective of this research was to study the influence of hot-pressing pressure and matrix-to-reinforcement ratio on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon-composite. Secondary objectives included determination of the physical and mechanical properties of the resulting composite. The ‘hybrid carbon-fiberreinforced mesophase-pitch-derived carbon-matrix’ composite was fabricated by hot pressing. During hot pressing, pressure was varied from 5... -
Flow cytometric evaluation on the age-dependent changes of testicular DNA contents in rats
Chang Yong Yoon, Choong Man Hong, Yong-Yeon Cho, Ji Young Song, I Jin Hong, Dae Hyun Cho, Beom Jun Lee, Hee Jong Song, Cheol Kyu 대한수의학회 Journal of Veterinary Science 4 Pages
대한수의학회 Journal of Veterinary Science 2001, 제 2권 제 1호 7 43-46 (4 pages)
An age-dependent cellular change of DNA contents in the testis of Sprague-Dawley rats was investigated by flow-cytometric method. Testicular cell suspensions at the age of 4, 5, 6, 7, 8, 10, 12, 16 and 26 weeks were prepared and stained with propidium iodide. The relative proportions in the number of mature and immature haploid (1n), diploid (2n), S-phase and tetraploid (4n) cells were calculated. The proportion in the number of mature haploid cells was sharply increased to the age of 10 weeks... -
Superhydrophobic carbon-based materials: a review of synthesis, structure, and applications
Long-Yue Meng, Soo-Jin Park 한국탄소학회 Carbon Letters 16 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 5 89-104 (16 pages)
Materials with appropriate surface roughness and low surface energy can form superhydrophobic surfaces, displaying water contact angles greater than 150°. Superhydrophobic carbon-based materials are particularly interesting due to their exceptional physicochemical properties. This review discusses the various techniques used to produce superhydrophobic carbon-based materials such as carbon fibers, carbon nanotubes, graphene, amorphous carbons, etc. Recent advances in emerging fields such as... -
Effect of canine mesenchymal stromal cells overexpressing heme oxygenase-1 in spinal cord injury
Seung Hoon Lee, Yongsun Kim, Daeun Rhew, Ahyoung Kim, Kwang Rae Jo, Yongseok Yoon, Kyeung Uk Choi, Taeseong Jung, Wan Hee Kim, O 대한수의학회 Journal of Veterinary Science 10 Pages
대한수의학회 Journal of Veterinary Science 2017, 제 18권 제 3호 15 377-386 (10 pages)
Heme oxygenase-1 (HO-1) is a stress-responsive enzyme that modulates the immune response and oxidative stress associated with spinal cord injury (SCI). This study aimed to investigate neuronal regeneration via transplantation of mesenchymal stromal cells (MSCs) overexpressing HO-1. Canine MSCs overexpressing HO-1 were generated by using a lentivirus packaging protocol. Eight beagle dogs with experimentally-induced SCI were divided into GFP-labeled MSC (MSC-GFP) and HO-1-overexpressing MSC... -
Use of a domestic Korean black goat (Capra hircus coreanae) with its chest crayon-harnessed in detecting estrus of Himalayan tahrs (Hemitragus jemlahicus)
Hwanyul Yong, Eunsong Lee* 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2014, 제 15권 제 3호 12 427-432 (6 pages)
The reliability of a Korean black goat (Capra hircus coreanae) to detect estrus in Himalayan tahrs (Hemitragus jemlahicus) for an artificial breeding program was investigated. Estrus in six female Himalayan tahrs was synchronized using fluorogestone acetate (FGA) sponges. Thirteen days later, 200 IU of PMSG and 100 IU of hCG were injected before removing the sponges and simultaneously injecting 5 mg of PGF2α the next day. Penetration of the cervical canal and the thickness and location of red... -
An overview of calf diarrhea - infectious etiology, diagnosis, and intervention
Yong-il Cho, Kyoung-Jin Yoon* 대한수의학회 Journal of Veterinary Science 17 Pages
대한수의학회 Journal of Veterinary Science 2014, 제 15권 제 1호 1 1-17 (17 pages)
Calf diarrhea is a commonly reported disease in young animals, and still a major cause of productivity and economic loss to cattle producers worldwide. In the report of the 2007 National Animal Health Monitoring System for U.S. dairy, half of the deaths among unweaned calves was attributed to diarrhea. Multiple pathogens are known or postulated to cause or contribute to calf diarrhea development. Other factors including both the environment and management practices influence disease severity or... -
Dissimilarity of ccrAB gene sequences between methicillin-resistant Staphylococcus epidermidis and methicillin-resistant Staphylococcus aureus among bovine isolates in Korea
Young Kyung Park, Young Hwan Paik, Jang Won Yoon, Lawrence K. Fox, Sun Young Hwang, Yong Ho Park 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2013, 제 14권 제 3호 9 299-305 (7 pages)
The sequences of the ccrAB genes from bovine-, canine- and chicken-originating methicillin-resistant Staphylococcus (S.) epidermidis (MRSE) and bovine methicillin-resistant Staphylococcus (S.) aureus (MRSA) were compared to investigate the frequency of intra-species horizontal transfer of the staphylococcal cassette chromosome mec (SCCmec) complex. Nineteen MRSE strains were isolated from bovine milk, chickens, and dogs, and their genetic characteristics were investigated by multilocus sequence...
