• Title/Summary/Keyword: Pressure stimulation

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EFFECT OF A NEW POSITIVE INOTROPIC AGENT, YS-49, A NOVEL TETRAHYDROISOQUINOLINE COMPOUND

  • Lee, Y. S.;Park, H. S. Yoon-;K. C. Chang
    • Proceedings of the Korean Society of Applied Pharmacology
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    • 1995.04a
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    • pp.88-88
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    • 1995
  • Tetrahydroisoquinoline (THI) compounds have various pharmacological actions in the cardiovascular system. Recently, we have synthesized 1-${\alpha}$-naphthylmethyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline, YS 49. In the present study, we evaluated the effect of YS-49 on positive inotropic and chronotropic action using isolated rat heart and on blood pressure and heart rate using anesthesized rabbit. Vasodilating action was also assessed in isolated rat thoracic aorta. YS 49, concentration-dependently relaxed rat aorta precontracted with phenylephrine (PE, 0.3 ${\mu}$M) and high potassium (high K$\^$+/, 65.4 mM). The 50% inhibitory concentration (IC$\sub$50/) of YS 49 in PE-induced and high K$\^$+/-induded contraction was 5.36 ${\mu}$M and 2.52 ${\mu}$M, respectively. In isolated rat atria, YS 49 increased both heart rate and force, and in anesthesized rabbit it decreased blood pressure but increased heart rate. In addition, to know the mechanism of action of the compound, propranolol, nonselective ${\beta}$-antagonist, and phentolamine, ${\alpha}$-blocker, were used. Furthermore, a comparison with the effect of higenamine, trimetoquinol on the vasodilating action in rat thoracic aorta was also made. The action of YS 49 was inhibited by the presence of propranolo, not pentolamine. These results indicate that cardiotonic and vasodilatory action of YS 49 is attributable, at least in part, for ${\beta}$-receptor stimulation.

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A study of sight-psychological effects by a color area of greenspace (녹지의 색면적에 따른 시각심리적 효과에 관한 연구)

  • 김은일
    • Journal of the Korean Institute of Landscape Architecture
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    • v.26 no.1
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    • pp.36-43
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    • 1998
  • We compared the electroencephalogram, blood pressure, and sensory evaluation inspectioni several color of Petunia hybrida to analyze the physiopsychological effects of a plant. Considering occipital is related to visuosensory field, green color is thought as mild visual stimulator unlike to pink color. The results are coincident with the well-known facts that green color is less stimulating color. It is also accorded with the sensory evaluation results that green color showed te feeling of blue and stable. In case of green color is showed the feeling of blue and stable. In case of green color the generatioin of alpha waves increased according to the increase color area. Therefore it is thought that green color helps decrease of visual stimulation and increase in visual stability. However it is thought that pink has less physiopsychological effects on human beings depending on area sizes than green has.

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The Study on Literature Review of Chinese Medical Treatment for Fibromyalgia (섬유근육통의 중의학적 치료에 대한 문헌적 연구)

  • Lee, Jong-Jin;Cho, Hyun-Chol;Song, Yeun-Kyung;Lim, Hyung-Ho
    • The Journal of Korea CHUNA Manual Medicine
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    • v.5 no.1
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    • pp.169-181
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    • 2004
  • Fibromyalgia(FMS) is a heterogeneous construct of chronic and widespread musculoskeletal pain that is frequently associated with sleep difficulties, fatigue, and other adjunctive symptoms. This article aims to review the literature on the theory and treatment for fibromyalgia in the chinese language article. chinese language aricles In wanfang data between 2001 and 2004 were reviewed. this result of research demonstrate that Acupuncture, Negative Pressure Therapy(Buhang), the Electrical Acupuncture Stimulation Therapy. Acupoints TENS are applied to treatment for fibromyalgia and these therapic managements of chinese medicine are more effective than western drug treatment.

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Pharmacological Studies of Plantaginis Semen (차전자(車前子)(질경이)의 약리학적(藥理學的) 연구(硏究))

  • Ko, Suk-Tai;Lim, Dong-Yoon
    • Journal of Pharmaceutical Investigation
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    • v.7 no.1_4
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    • pp.28-37
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    • 1977
  • The pharmacological actions to methanol extract(PME) obtained from Plantaginis semen were examined in the rabbit. 1) PME, when administered into the vein of rabbit, produced the fall of blood pressure and stimulation of respiration. The former action was inhibited by atropine but the latter not affected by atropine. 2) PME caused contraction in both isolated intestinal and uterus strips, atropine blocked the contraction of intestinal strips while did not the uterus contraction. 3) PME decreased the heart rate of rabbit anesthetized with urethane. 4) PME elicited antidiuresis with doses ranging from 10mg/kg. The antidiuresis appeared to be related to the hemodynamic changes decreases in the renal plasma flow and glomerular filtration rate. Urinary sodium and potassium decrease in the renal plasma flow and glomerular filtration rate. Urinary sodium and potassium decrease in relation to the diminished filtration.

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The Clinical Study of Ketamine HC1 on Oral Surgery (구강외과 영역에 있어서 Ketamine HC1의 임상적 고찰)

  • Cho, Byoung-Uk
    • The Journal of the Korean dental association
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    • v.11 no.1
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    • pp.45-52
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    • 1973
  • Ketamine HC1(Phencyclidine derivative) is a white, crystalline substance with melting point 259℃. It is soluble in water to a 20% clear, colorless solution. a 10% aqueous solution has a pH 3.5. The chemical structure is 2-(O-chlorophenyl)-2-(methylamino) cyclohexanone hydrochloride. It is a rapid acting, nonhypnotic, nonbarbiturate drug with a wide safety margin. The author used the anesthetic ketamine hydrochloride for oral surgery procedure in 16 patients(2 to 33 years). Anesthesia was achieved with a single intramuscular injection by introduction of manufacture. Result obtained as follows : 1. It was easily administered. 2. Onset time was rapid and duration was short. 3. The mild cardiac stimulation resulted in moderate increase in the blood pressure and pulse. 4. There was no significant respiratory depression. 5. The airway can be maintained without artificial support or endotracheal intubation. 6. All protective reflex maintained, which was important in oral surgery. 7. The best results were achieved in pediatric patients than adults.

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Segmental Radiculopathic Model and Stimulation Therapy (분절성 신경근병성 모델과 자극요법)

  • Ahn, Kang;Lee, Young-Jin
    • Clinics in Shoulder and Elbow
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    • v.6 no.2
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    • pp.115-126
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    • 2003
  • Although painful conditions of varying degrees of severity involving the soft tissues (i .e., muscles, tendons, ligaments, periosteum and peripheral nerves) occur frequently, their underlying pathogenesis is poorly understood. The term peripheral neuropathic pain has recently been suggested to embrace the combination of positive and negative symptoms in patients whose pain is due to pathological changes or dysfunction in peripheral nerves or nerve root. The spinal nerve root, because of its vulnerable position, is very easily prone to injury from pressure, stretch, angulation, and friction. Therefore, not a few of musculoskeletal chronic pains are result of nerve root dysfunction. Neuropathic changes due to nerve root dysfunction are primarily in soft tissue especially muscle, tendon and joint. It shows tenderness over muscle motor points and palpable muscle contracture bands and restricted Joint range. Careful palpation and physical examination is the important tool that, be abne to detect all of these phenomena.

Immunohistochemical Changes of Apoptotic Control Genes by Chronic Inhibition of Nitric Oxide in Rats

  • Bae, Hyung-Joon
    • Biomedical Science Letters
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    • v.18 no.4
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    • pp.420-427
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    • 2012
  • Sprague-Dawley (SD) rats were orally administered with NG-nitro-L-arginine methyl ester (L-NAME), which inhibits or blocks the production of nitric oxide from L-arginine in vascular endothelial cells and vessel tissue. We examined the effects of nitric oxide on some physiological changes such as blood pressure and heart rate, and confirms the apoptosis induced by the suppressed nitric oxide activity in the kidney. This study was performed to investigate correlation between the activities of nitric oxide and apoptosis by immunohistochemical changes of apoptotic control proteins with regulated chronic inhibition of nitric oxide. In the kidney from L-NAME-treated group, immunohistochemical reaction to the antigens of apoptosis inhibiting proteins such as bcl-2 and bcl-xL, exhibited a time-dependent reduction. The expression of apoptosis-inhibiting proteins such as bax and p53 increased expression in proportion to the duration of treatment. The most sensitive apoptosis regulating proteins to L-NAME were p53 in stimulation and bcl-2 in inhibition, respectively.

A Study on the Green Emission Characteristics of Organic Device Produced by LB Method (LB법에 의해 제작된 유기소자의 녹색 발광특성에 관한 연구)

  • Chon, Dong-Kyu;Lee, Kyung-Sup
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.11a
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    • pp.506-509
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    • 2002
  • In this paper. we give pressure stimulation into organic ultra thin films and detected the induced displacement current proper ties, and then manufacture a device under the accumulation condition. In processing of a device manufacture. And electroluminescence(EL) from conjugated polymers has recently received great attention because polymer light-emitting diodes(LEDs) clealy have potential for applications such as large-area displays. The operation of polymer LEDs is based on double injection of electrons and holes from the elextrodes. followed by formation of excitons whose radiative decay results in light emission at wavelength characteristic to the material. In this paper, we fabricated the single layer EL device using $Alq_3$ as emitting material. According as turn on voltage could know about 5.5V in voltage-current characteristics and voltage rise, current could see that increase as non-linear, Current and ruminance can see that express similar relativity in voltage, and could know that ruminance is expressing current relativity.

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A Study on the Response Characteristic by Stimulus Speed of Organic Thin Films (유기박막의 자격속도에 따른 응답특성에 관한 연구)

  • 조수영;이경섭
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1997.11a
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    • pp.385-388
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    • 1997
  • We hate examined the electrical properties of L-${\alpha}$-DLPC Langmuir(L) films by using a displacement current measuring technique with pressure stimulation. Displacement current was generated when the sample spread volume was about 280${\mu}\ell$, 360${\mu}\ell$ and compression velocity was about 30, 40, 50mm/min. Displacement current was generated in the range of gas state, gas/fluid state and fluid state in the course of monolayer compression. From the result, it is known that displacement current is generated in the range of high surface pressures as compression velocity become faster.

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An Empirical Analysis of Auditory Interfaces in Human-computer Interaction

  • Nam, Yoonjae
    • International Journal of Contents
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    • v.9 no.3
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    • pp.29-34
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    • 2013
  • This study attempted to compare usability of auditory interfaces, which is a comprehensive concept that includes safety, utility, effectiveness, and efficiency, in personal computing environments: verbal messages (speech sounds), earcons (musical sounds), and auditory icons (natural sounds). This study hypothesized that verbal messages would offer higher usability than earcons and auditory icons, since the verbal messages are easy to interpret and understand based on semiotic process. In this study, usability was measured by a set of seven items: ability to inform what the program is doing, relevance to visual interfaces, degree of stimulation, degree of understandability, perceived time pressure, clearness of sound outputs, and degrees of satisfaction. Through the experimental research, the results showed that verbal messages provided the highest level of usability. On the contrary, auditory icons showed the lowest level of usability, as they require users to establish new coding schemes, and thus demand more mental effort from users.