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주파수 효율 및 성능 향상을 위한 Frequency Slope Modulated Chirp 신호를 이용한 UWB 시스템
김정현, 김지현, 유철우, Kim. Jung-Hyun, Kim. Ji-Hyun, You. Cheol-woo 한국통신학회 한국통신학회논문지. The journal of Korea Information and Communications Society. 무선통신 6 Pages
한국통신학회 한국통신학회논문지. The journal of Korea Information and Communications Society. 무선통신 2011, Vol.36 127-132 (6 pages)
본 논문은 Chirp 신호가 변조된 UWB frequency slope를 이용한 거리 측정 기술 및 통신 시스템을 제안하였다. 오직 up-chirp 만 사용하거나 혹은 (주파수 간) 동일한 주파수 변화도(frequency sweeping rate)를 가진 down-chirp 만 사용하는 대신에, 제안된 시스템은 주파수 도약을 이용하여 서로 다른 주파수 변화도를 가지는 여러 Chirp 신호를 사용한다. 제안된 시스템은 데이터 전송 속도를 증가시킬 수 있고 동시에 사용자들이 사용한 sequence 간에 간섭도 줄일 수 있기 때문에 기존 통신 거리 측정 전략보다도 성능이 좋다. 본... -
pH-dependent modulation of intracellular free magnesium ions with ion- selective electrodes in papillary muscle of guinea pig
Shang-Jin Kim, In-Gook Cho, Hyung-Sub Kang, Jin-Shang Kim 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2006, 제 7권 제 1호 5 31-36 (6 pages)
A change in pH can alter the intracellular concentration of electrolytes such as intracellular Ca2+ and Na+ ([Na+]i) that are important for the cardiac function.For the determination of the role of pH in the cardiac magnesium homeostasis, the intracellular Mg 2+ concentration ([Mg 2+]i), membrane potential and contraction in the papillary muscle of guinea pigs using ion-selective electrodes changing extracellular pH ([pH]o)or intracellular pH ([pH ]i )were measured in this study. A high... -
Antidepressant drug paroxetine blocks the open pore of Kv3.1 potassium channel
HyangMiLee, OkHeeChai, SangJuneHahn, BokHeeChoi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2018, Vol.22 No.1 8 71-80 (10 pages)
determine whether paroxetine, a very potent selective serotonin reuptake inhibitor (SSRI), interacts with ion channels that modulate neuronal excitability, we examined the effects of paroxetine on Kv3.1 potassium channels, which contribute to high-frequency firing of interneurons, using the whole-cell patch-clamp technique. Kv3.1 channels were cloned from rat neurons and expressed in Chinese hamster ovary cells. Paroxetine reversibly reduced the amplitude of Kv3.1 current, with an IC50 value of... -
Effects of acidic pH on voltage-gated ion channels in rat trigeminal mesencephalic nucleus neurons
Jin-EonHan, Jin-HwaCho, In-SunChoi, Do-YeonKim, Il-SungJang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.2 9 215-223 (9 pages)
6.0 solution showed complex modulation of the current-voltage and conductance-voltage relationships, the midpoint voltages for the activation of HCN channels were not changed by acidic pH. On the other hand, voltage-dependent Ca2+ channels were significantly inhibited by an acidic pH. The application of an acidic pH solution significantly shifted the current-voltage and conductance-voltage relationships to the depolarization range. The modulation of several voltage-dependent ion channels by an... -
Potassium Currents in Isolated Deiters' Cells of Guinea Pig
JongWooChung, EuiCholNam, WonTaeKim, JaeBoumYoum, ChaeHunLeem 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.6 10 537-546 (10 pages)
Deiters' cells are the supporting cells in organ of Corti and are suggested to play an important role in biochemical and mechanical modulation of outer hair cells. We successfully isolated functionally different K+ currents from Deiters’ cells of guinea pig using whole cell patch clamp technique. With high K+ pipette solution, depolarizing step pulses activated strongly outward rectifying currents which were dose-dependently blocked by clofilium, a class III anti-arrhythmic K+ channel blocker.... -
Bile Acid Inhibition of N-type Calcium Channel Currents from Sympathetic Ganglion Neurons
HyeKyungLee, KyoungHwaLee, Eui-SicCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.1 4 25-30 (6 pages)
the control recorded without CA. Other single channel properties including slope conductance, single channel current amplitude, open and shut times were not significantly affected by CA being present. The results suggest that CA could modulate N-type Ca2＋ channel gating at a concentration as low as 10－6 M. Bile acids have been shown to activate nonselective cation conductance and depolarize the cell membrane. Under pathological conditions with increased circulating bile acids, CA suppression... -
Lysophosphatidylcholine Increases Ca2+ Current via Activation of Protein Kinase C in Rabbit Portal Vein Smooth Muscle Cells
SeungsooJung, YounghoLee, SungsikHan, YoungwhanKim, TaiksangNam, DucksunAhn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 4 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.1 5 31-34 (4 pages)
Lysophosphatidylcholine (LPC), a metabolite of membrane phospholipids by phospholipase A2, has been considered responsible for the development of abnormal vascular reactivity during atherosclerosis. Ca2+ influx was shown to be augmented in atherosclerotic artery which might be responsible for abnormal vascular reactivity. However, the mechanism underlying Ca2+ influx change in atherosclerotic artery remains undetermined. The purpose of the present study was to examine the effects of LPC on... -
Open Channel Block of Kv3.1 Currents by Genistein, a Tyrosine Kinase Inhibitor
BokHeeChoi, JiHyunPark, SangJuneHahn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2006, Vol.10 No.2 3 71-78 (8 pages)
can close. Genistein-induced block was voltage-dependent, increasing in the voltage range (20 mV∼0 mV) for channel opening, suggesting an open channel interaction. Genistein (20μM) produced use-dependent block of Kv3.1 at a stimulation frequency of 1 Hz. The voltage dependence of steady-state inactivation of Kv3.1 was not changed by 20μM genistein. Our results indicate that genistein blocks directly Kv3.1 currents in concentration-, voltage-, time-dependent manners and the action of... -
Direct Block of Cloned K+ Channels, Kv1.5 and Kv1.3, by Cyclosporin A, Independent of Calcineurin Inhibition
BokHeeChoi, SangJuneHahn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.6 7 353-362 (10 pages)
The interaction of cyclosporine A (CsA), an immunosuppressant, with rat brain Kv1.5 (Kv1.5) channels, which were stably expressed in Chinese hamster ovary cells, was investigated using the whole-cell patch-clamp technique. CsA reversibly blocked Kv1.5 currents at 50 mV in a reversible concentration- dependent manner with an apparent IC50 of 1.0μM. Other calcineurin inhibitors (cypermethrin, autoinhibitory peptide) had no effect on Kv1.5 and did not prevent the inhibitory effect of CsA.... -
Regulation of L-type Calcium Channel Current by Somatostatin in Guinea-Pig Gastric Myocytes
YoungChulKim, JaeHoonSim, SangJinLee, TongMookKang, SungJoonKim, SeungRyulKim, SeiJinYoun, SangJeonLee, Wen-XieXu6, InsukSo, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.2 5 103-108 (6 pages)
To study the direct effect of somatostatin (SS) on calcium channel current (IBa) in guinea-pig gastric myocytes, IBa was recorded by using whole-cell patch clamp technique in single smooth muscle cells. Nicardipine (1μM), a L-type Ca2+ channel blocker, inhibited IBa by 98⁑1.9% (n=5), however IBa was decreased in a reversible manner by application of SS. The peak IBa at 0 mV were decreased to 95⁑1.1, 92⁑1.9, 82⁑4.0, 66⁑5.8, 10⁑2.9% at 1010, 109,... -
Presynaptic Mechanism Underlying Regulation of Transmitter Release by G Protein Coupled Receptors
TomoyukiTakahashi, YoshinaoKajikawa, MasahiroKimura, NaotoSaitoh, TetsuhiroTsujimoto 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2004, Vol.8 No.2 1 69-76 (8 pages)
A variety of G protein coupled receptors (GPCRs) are expressed in the presynaptic terminals of central and peripheral synapses and play regulatory roles in transmitter release. The patch-clamp whole-cell recording technique, applied to the calyx of Held presynaptic terminal in brainstem slices of rodents, has made it possible to directly examine intracellular mechanisms underlying the GPCR-mediated presynaptic inhibition. At the calyx of Held, bath-application of agonists for GPCRs such as GABAB... -
Thiol-dependent Redox Mechanisms in the Modification of ATP-Sensitive Potassium Channels in Rabbit Ventricular Myocytes
JinHan, NariKim, DangVanCuong, ChunghuiKim, EuiyongKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.1 4 15-23 (9 pages)
Cellular redox state is known to be perturbed during ischemia and that Ca2 and K channels have been shown to have functional thiol groups. In this study, the properties of thiol redox modulation of the ATP-sensitive K (KATP) channel were examined in rabbit ventricular myocytes. Rabbit ventricular myocytes were isolated using a Langendorff column for coronary perfusion and collagenase. Single-channel currents were measured in excised membrane patch configuration of... -
The Effects of Intracellular Monocarboxylates on the ATP-sensitive Potassium Channels in Rabbit Ventricular Myocytes
NariKim, JinHan, Eui-YongKim, Won-KyungHo, YungE.Earm 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.5 6 581-589 (9 pages)
activity. These effects were reversible upon washout. Analysis of single channel kinetics showed that monocarboxylates did not affect open-time constant and close-time constant. These results suggest that monocarboxylates participate in modulating KATP channels activity in cardiac cells and that modulation of KATP channels activity may resolve the discrepancy between the low Ki in excised membrane patches and high levels of intracellular ATP concentration during myocardial ischemia or hypoxia. -
Characteristic Intracelluar Response to Lidocaine And MK-801 of Hippocampal Neurons An In Vivo Intracellular Neuron Recording Study
Byung-JuChoiJin-HwaCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.3 4 297-305 (9 pages)
effect of lidocaine and MK-801 on the membrane properties and the synaptic responses of individual neurons to electrical stimulation of the commissural pathway. Cells in control group typically fired in a tonic discharge mode with an average firing frequency of 2.4⁑0.9 Hz. Neuron in MK-801 treated group (0.2 mg/kg, i.p.) had an average input resistance of 32.8⁑5.7 MΩ and a membrane time constant of 7.4⁑1.8 ms. These neurons exhibited 2.4⁑0.2 ms spike durations, which wer... -
Pathways Conducting Cerebellar Evoked Potentials in the Spinal Cord of Rat
Jin-Sook Cheon, Walter J. Levy 대한신경정신의학회 신경정신의학 15 Pages
대한신경정신의학회 신경정신의학 1991, 제 30권 제 3호 5 485-499 (15 pages)
소뇌유발전위는 소뇌피질의 전기적 자극후에 척수 및 말초신경을 따라 측정할 수 있다. 본 눈문에서는 소뇌유발전위가 추제외로 증상의 통합을 검사하는 임상적 도구로 사용될 수 있을 가능성이 제시되었다. 그러나, 소뇌유발전위의 기원과 경로는 아직 잘 이해되고 있지 못하다. 이 논문에서 저자들은 피질척수로, 척주, 적핵척수로 및 배측척수소뇌로가 차단된 척수의 급격한 병소를 만들므로써 소뇌의 경로를 연구하였다. 척수의 배측 반을 포함하는 T 5와 L1 사이에 가해진 급격한 병소는 병소 부위 아래에서 측정된 소뇌유발전위의... -
Barbiturates가 소의 대뇌피질 Synaptosomal Plasma Membrane Vesicles로 부터 추출 제제한 총지질 및 총인지질 인공세포막에 형성된 비대칭적 유동성에 미치는 비대칭적 영향
윤일(Il Yun), 강정숙(Jung-Sook Kang) 대한약리학회 대한약리학잡지 12 Pages
대한약리학회 대한약리학잡지 1992, 제 28권 제 1호 11 103-114 (12 pages)
한국산 2년생 소의 신선한 대뇌피질로 부터 synaptosomal plasma membrane vesicles (SPMV)를 분리한 후 이 SPMV로 부터 추출한 총지질 (SPMVTL) 및 총인지질 (SPMVPL)로서 인공세포막을 제제하였다. SPMVTL 및 SPMVPL의 outer monolayer에 trinitrophenyl groups로 공유결합시킴으로써 형광 probe 1,6-diphenyl-1,3,5-hexatriene (DPH)의 outer monolayer 형광을 선택적으로 소광케한 후 SPMVTL 및 SPMVPL의 inner와 outer monolayer 사이의 비대칭적 유동성 존재 유무를 확인하였던 바 inner monolayer에 비하여 outer monolayer가... -
Induction of Oscillatory Firing Activity by TTX in Rat Cerebellar Purkinje Cells
Seo, Wha-Sook 대한생리학회 대한생리학회지 88 Pages
대한생리학회 대한생리학회지 1995, 제 29권 제 1호 10 103-190 (88 pages)
to modulation of membrane potential although underlying mechanisms for maintenance of oscillatory activity were influenced by membrane voltage. The mechanism of TTX-induced oscillation was not related to the presence or amplitude of Ih] and could still induce the oscillatory activity after blockade of Ih] by cesium. The result from an experiment in which QX-314 was injected intracellularly strongly suggested that TTX-induced oscillatory firing activity was due to blockade of post-synaptic Na+... -
Properties of Single K+ Channels of Skeletal Muscle Incorporated into Planar Lipid Bilayer
Park, Jin-Bong, Kim, Hee-Jeong, Cho, Myung-Haing, Lee, Hang, Park, Hong-Ki, Lee, Mun-Han, Ryu, Pan-Dong 대한생리학회 대한생리학회지 16 Pages
대한생리학회 대한생리학회지 1995, 제 29권 제 1호 2 13-28 (16 pages)
~ +80 mV. The slope conductance of the substate and open-state were 40 and 144 pS in 0.2 M KCl, respectively. The channel was highly selective for K+ over Cl. The open-state probability was weakly voltage-dependent (e-fold change per 35 mV. The lifetime distributions of open- and closed-states were fitted with two exponentials and the major gating occurred slowly at several hundred milliseconds. Based on the above results, we think the second type of K+ channel is the sarcoplasmic reticulum K+... -
정상과 고심도 감각신경성난청에서 청성지속반응(Auditory Steady-State Response)에 영향을 주는 변수에 관한 고찰
조수진, 이정학, 김형종, 조소현, 임덕환, 김진숙 한국청각언어재활학회 Audiology and Speech Research 7 Pages
한국청각언어재활학회 Audiology and Speech Research 2005, 제 1권 제 1호 5 28-34 (7 pages)
청성지속반응(auditory steady-state response, ASSR)은 연속적인 음 자극(continuous acoustic stimuli)에 대한 청각전도로의 반응으로 특히 고심도 난청의 청력을 추정할 수 있는 대표적인 객관적 검사로 알려져 있다.12) 이러한 ASSR은 변조된 순음(pure tone)에 의해서 유발되기 때문에 청성뇌간반응(auditory brainstem response, ABR) 측정 시 주로 사용하는 클릭음(click)보다 와우의 좁은 부위를 자극하게 되어 주파수 특이성이 더 높고,9) 자동반응탐지 알고리즘(automatic response detection algorithm)을 사용하기 때문에... -
Nortriptyline, a tricyclic antidepressant, inhibits voltage-dependent K+ channels in coronary arterial smooth muscle cells
SungEunShin, HongliangLi, HanSolKim, HyeWonKim, MiSeonSeo, Kwon-SooHa, Eun-TaekHan, Seok-HoHong, AmyL.Firth, Il-WhanChoi6, YoungMinBae, Won 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.2 10 225-232 (8 pages)
We demonstrated the effect of nortriptyline, a tricyclic antidepressant drug and serotonin reuptake inhibitor, on voltage-dependent K+ (Kv) channels in freshly isolated rabbit coronary arterial smooth muscle cells using a whole-cell patch clamp technique. Nortriptyline inhibited Kv currents in a concentration-dependent manner, with an apparent IC50 value of 2.86±0.52 µM and a Hill coefficient of 0.77±0.1. Although application of nortriptyline did not change the activation curve,... -
Blockade of Kv1.5 by paroxetine, an antidepressant drug
HyangMiLee, SangJuneHahn, BokHeeChoi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2016, Vol.20 No.1 10 75-82 (8 pages)
Paroxetine, a selective serotonin reuptake inhibitor (SSRI), has been reported to have an effect on several ion channels including human ether-a-go-gorelated gene in a SSRI-independent manner. These results suggest that paroxetine may cause side effects on cardiac system. In this study, we investigated the effect of paroxetine on Kv1.5, which is one of cardiac ion channels. The action of paroxetine on the cloned neuronal rat Kv1.5 channels stably expressed in Chinese hamster ovary cells was... -
Gender-Related Differences in a Process of the Age-Dependent Alterations of the Elements in Monkey Sino-Atrial Node
HiroyasuSatoh, SetsukoTohno, TakeshiMinami, TakaoOishi, MotoharuHayashi, YoshiyukiTohno 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.5 1 249-256 (8 pages)
Gender differences in the trace elements of monkey sino-atrial (SA) node were investigated in a process of age-dependent alterations. Sixty hearts from Japanese and rhesus monkeys (30 male and 30 female) used were aged ranging from 1-day- to 30-year-old. The elements were analyzed using an inductively coupled plasma-atomic emission spectrometer (ICP-AES). Advancing age decreased all the trace elements. Ca, P, S and Mg significantly decreased. The correlation coefficients of Ca and P were... -
Correlation between mEPSC Amplitude and Rise Time upon the Blockade of AMPA Receptor Desensitization at Hippocampal Synapses
SuHyunJung, SukwooChoi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.2 3 81-86 (6 pages)
Conventional views of synaptic transmission generally overlook the possibility of "postfusional- control" the regulation of the speed or completeness of transmitter release upon vesicular fusion. However, such regulation often occurs in non-neuronal cells where the dynamics of fusion-pore opening is critical for the speed of transmitter release. In case of synapses, the slower the transmitter release, the smaller the size and rate-of-rise of postsynaptic responses would be expected if... -
Role of K+ Channels to Resting Membrane Potential of Rabbit Middle Cerebral Arterial Smooth Muscle Cells
NariKim, JinHan, EuiyongKim, Yun-HeeKim, Jae-HongSim, Soo-CheonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.6 2 547-554 (8 pages)
The aim of the present study is to investigate the contribution of Ca2-activated K (KCa) channels and delayed rectifier K (KV) channels to the resting membrane potential (RMP) in rabbit middle cerebral arterial smooth muscle cells. The RMP and membrane currents were recorded using the whole-cell patch configuration and single KCa channel was recorded using the outside-out patch configuration. Using the pipette solution containing 0.05 mM EGTA, the RMP was... -
청력 손실자의 보청기 착용 전후의 말 지각에서의 변화
한우재 한국청각언어재활학회 Audiology and Speech Research 12 Pages
한국청각언어재활학회 Audiology and Speech Research 2011, 제 7권 제 2호 3 133-144 (12 pages)
