• YAKHAK HOEJI
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• v.30 no.2
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• pp.73-78
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• 1986

Peucedanum terebinthaceum Fischer (Umbelliferae) known as "Gi Reum Na Mool" in Korea and used for the treatment of cough, phlegm, headache and common cold etc. The substances were isolated from the fruits of Peucedanum terebinthaceum and identified by UV, GLC, IR, NMR, Mass spectra and physico-chemical tests. The steroidal compounds from the fruits were identified as $\beta$-sitosterol (tR 33.01 min.) and stigmasterol (tR 28.87 min.) by GLC. Substance I (colorless prismatic crystal, $C_{19}H_{20}O_5$, mp $110~111^{\circ}$) was identified as decursin which is one of the pyranocoumarin. Hydrolysis of substance I with 5%-potassium hydroxide produced decursinol. Acetylation of decursinot gave its monoacetate, white needles, $C_{16}H_{16}O_5$. Substance II(light yellowish white needle crystal, $C_9H_6O_3$, mp $227~228^{\circ}$) was proved to be umbelliferone. Substance I, decursin, was isolated for the first time from the fruits of Peucedanum spp. (Umbelliferae).

• YAKHAK HOEJI
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• v.12 no.3_4
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• pp.59-64
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• 1968

Silica gel column chromatography of the ether extract of the root of Angelica Koreana $M_{AXIMOWICZ}$ (Umbelliferae) gave five kinds of crystalline products of coumarin. The following kinds of furocoumarins were identified by UV, IR, NMR spectra and physico-chemical tests. iso-imperatorin m.p. 108-$109^{\circ}$ $C_{16}H_{14}O_{4}$ oxypeucedanin m.p. 142-$143^{\circ}$ $C_{16}H_{14}O_{5}$ prangolarine m.p. 104-$105^{\circ}$ $C_{16}H_{14}O_{5}$ imperatorin m.p. 100-$101^{\circ}$ $C_{16}H_{14}O_{4}$ These analyses also showed that white needles m.p. 129-$130^{\circ}$ were likely to be a furocoumarin. Besides, the methanol extract of the root was found to contain sucrose.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.19 no.2
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• pp.63-68
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• 2005

This paper describes the characteristics of effective impulse ground impedance of deeply driven ground rods combined with grounding grid or counterpoises with needles. The potential rises of the test ground electrodes were measured as a function of the rise time of applied impulse currents and the effective impulse ground impedances were calculated The impulse ground impedances of deeply driven ground rods strongly depend on the rise time of impulse currents and significantly reduced by the connection of grounding grids in parallel.

• Mycobiology
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• v.39 no.4
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• pp.266-271
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• 2011

Species of Phoma and its allies were isolated during a survey on the diversity of endophytic fungi associated with pine trees in Korea. Based on the phylogenetic analyses of internal transcribed spacer and ${\beta}$-tubulin gene sequences, two Phoma-like species from the needles of Pinus koraiensis were identified as Peyronellaea calorpreferens and P. glomerata. They were also morphologically identified based on the previous descriptions. Here, we report P. calorpreferens and P. glomerata being present in Korea as endophytic fungi in Pinus koraiensis.

• The Journal of Korean Medical History
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• v.21 no.2
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• pp.29-39
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• 2008

"濟衆立效方" is the oldest Koryo dynasty medical document known to date. Despite its historical importance, due to the absence of its original copy, its true characters could not be understood. Through comparison of the many documents that cited 濟衆立效方, it could be found that 濟衆立效方 can be classified into two parts based on its contents and form. In Chinese medical texts, neither the name 交效散 nor any similar prescription is mentioned. 濟衆立效方 was the first in suggesting the usage of pine needles and salt for fomentation and not for internal use. Thus 交效散 can be thought of as the oldest indigenous prescription preserved in Korean history. 濟衆立效方 conveys records of the combination of the ancient origin pine needle fomentation and the creative addition of salt.

• The Journal of Korean Society for Radiation Therapy
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• v.3 no.1
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• pp.11-18
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• 1989

Brachytherapy is known to be a good modality to achieve local control as a boost treatment following limited external irradiation, which may reduce the external beam related complication particularly in head and neck cancer. The authors developed iridium-192 ribbons recently to replace the radium needles in the field of brachytherapy. Total of 48 cases of head and neck and pelvic-perineal cancer patients had been treated with Ir-192 ribbons during last two years from October 1986 to September 1988, and the results were analyzed to assess the applicability of the fabricated sources. The conclusion is as follows; 1. Iridium implant resulted excellent tumor control effect in clinical application. 2. Iridium is superior than radium and cecium in brachytherapy because of easier to use and lesser exposure to the personnel. 3. Afterloading technique is useful to modify dose distribution, to expand treatment site and method, and to develop interstitial hyperthermia.

• Mycobiology
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• v.43 no.3
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• pp.366-370
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• 2015

Acanthopanax divaricatus, a member of the Araliaceae family, has been used as an invigorant in traditional Korean medicine. During disease monitoring, a stem with small, irregular, brown lesions was sampled at a farm in Cheonan in 2011. The symptoms seen were sunken cankers and reddish-brown needles on the infected twig. The isolated fungal colonies were whitish, having crenated edges and aerial mycelium on the surface, and with black gregarious fruiting bodies. The reverse plate was creamy white. Conidia were $17{\sim}22{\times}3.5{\sim}4.2{\mu}m$, fusiform, 4-septate, and straight to slightly curved. The nucleotide sequence of the partial translation elongation factor 1 alpha gene of the fungal isolate, shares 99% sequence identity with that of known Pestalotiopsis ellipsospora. Based on the results of the morphological and molecular analyses, the fungal isolate was identified as P. ellipsospora. In Korea, this is the first report of canker on A. divaricatus.

• Journal of Surface Science and Engineering
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• v.36 no.4
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• pp.347-355
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• 2003

Roughening of metal surfaces frequently enhances the adhesion strength of metals to polymers by mechanical interlocking. When a failure occurs at a roughened metal/polymer interface, the failure prone to be cohesive. In a previous work, an adhesion study on a roughened metal (oxidized copper-based leadframe)/polymer (Epoxy Molding Compound, EMC) interface was carried out, and the correlation between adhesion strength and failure path was investigated. In the present work, an attempt to interpret the failure path was made under the assumption that microvoids are formed in the EMC as well as near the roots of the CuO needles during compression-molding process. A simple adhesion model developed from the theory of fiber reinforcement of composite materials was introduced to explain the adhesion behavior of the oxidized copper-based leadframe/EMC interface and failure path. It is believed that this adhesion model can be used to explain the adhesion behavior of other similarly roughened metal/polymer interfaces.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.68 no.5
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• pp.656-661
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• 2019

Currently, the devices to generate ion winds in air are mainly composed of corona electrodes and induction(ground) electrodes, of which the corona electrodes mainly use needles or wires as electrodes and the induction electrodes use plate electrodes of ring or mesh type. Ion winds can be effectively generated through a diverse combination of corona electrodes and induction electrodes mentioned above. However, only changing the form and structure of corona electrodes and induction electrodes has a limit in raising the speed of ion winds. This paper conducted a study on the characteristics of ion wind generation by additionally installing acceleration electrodes in addition to corona electrodes and induction electrodes to increase the speed of ion winds.

• Journal of Acupuncture Research
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• v.38 no.3
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• pp.242-244
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• 2021

LI15 is an important acupuncture point to treat shoulder pain. There are 4 needling methods for LI15 in the textbook; 1 method requires the insertion of the needle horizontally between the acromion and the great tuberosity of the humerus with the arm lowered for supraspinatus tendonitis. This method is also applicable for all conditions of rotator cuff disease, but it has not previously been described in detail. Providing X-ray scans and describing needle direction and depth of insertion will provide evidence for needling with the arm down as an effective stimulation of the subacromial space. Firstly, for this technique, with the arm raised, a concave point is located between the front edge of the acromion and the humerus, and the lower upper arm. Secondly, the acupuncture needle is inserted slightly posteriorly towards the supraspinous fossa, in the direction of the supraspinatus tendon and to a depth of 30-40 mm.