• Archives of Pharmacal Research
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• 제10권3호
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• pp.179-183
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• 1987

To investigate antitumor constituents of higher fungi, the carpophores of Polyporus giganteus Pers. ex. Fr. (81 g, dry weight) which were collected in Indiana, U. S. A. were examined for antitumor activity. Two protein-bound-polysaccharide fractions (I and II) were prepared from the hot water extract and one fraction (III) from the 0.1 N NaOH extract of the carpophores. The antitumor effect of each fraction was tested against sarcoma 180 implanted subcutaneously in female ICR mice. Of three fractions, Fraction II showed 85.2% inhibition ratio at the dose of 20 mg/kg/day for 10 days and was named gigantan. Gigantan was found to contain 59% polysaccharide and 27% protein. Its polysaccharide moity was a heteroglycan that consisted of mainly glucose (89.3%), galactose (7.7%), minaose (2.0%) and fructose (1.0%).

• 생약학회지
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• 제17권1호
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• pp.73-77
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• 1986

Anthraquinones, physcion (I), mp $204{\sim}205^{\circ}$ and emodin (II), mp $254{\sim}255^{\circ}$, and $emodin-8-O-{\beta}-{_D}-glucoside$ (IV), mp $191{\sim}192^{\circ}$ together with ${\beta}-sitosterol$ glucoside (III), mp $280{\sim}282^{\circ}$ were isolated from the roots of Polygonum ellipticum Migo and P. sachalinense Fr. Schm. (Polygonaccae). Stilbene derivatives, 3,5,4'-trihydroxystibene (V), mp $258{\sim}260^{\circ}$ and $3,5,4'-trihydroxystilbene-3-O-{\beta}-{_D}-glucoside$ (VI), mp $142{\sim}144^{\circ}$ were also isolated.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권6호
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• pp.2464-2479
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• 2020

This paper presents a detailed subjective quality assessment for the ultra-high definition (UHD) videos having frame rates of 30fps and 60 fps. The subjective assessment is based on the ITU-R BT-500 recommendations, where double stimulus continuous quality scale (DSCQS-type II) test is performed for the evaluation of the perceived quality of the user's in terms of differential mean opinion score (DMOS). Encoding of the UHD videos by opting encoders i.e. H.264/AVC, H.265/HEVC, and VP9 at five different quantization parameter (QP) levels is done to investigate the perceived user's quality of experience (QoE) given as DMOS. Moreover, the encoding efficiency as the encoding time for each encoder and qualitative performance by employing full-reference (FR) quality metrics are presented in this work.

• Journal of Photoscience
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• 제3권1호
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• pp.9-14
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• 1996

For three cultivars of chilling-sensitive cucumber plants, chilling sensitivity was evaluated in terms of photosynthetic activity using Chl fluorescence techniques. Low-temperature treatment caused a decrease in photosynthetic activities of cucumber leaves, measured as CO$_2$ exchange, as well as the decrease in the stomatal conductance. FR of the three cultivars decreased after chilling for 24 h in light and the extent of decline of F$_R$ was the greatest in 'Chosaeng' cultivar. When these plants were recovered from light-chilling, 'Chosaeng' and 'Samchuk' cultivars did not fully restore the original value of F$_R$ after 24 h of recovery, in contrast to 'Ilmi' cultivar which showed a rather efficient recovery. The results of FR study showed that 'Chosaeng' was most susceptible, whereas Ilmi was most resistant, to chilling among the three cultivars of cucumber plants. When quenching coefficients for chlorophyll fluorescence was analyzed after chilling the cucumber plants for 24 h in light, 'Chosaeng' elicited more rapid declines in the coefficients for photochemical quenching (qQ), non-photochemical quenching (qNP) and energy-dependent quenching (qE) than 'Ilmi' and 'Samchuk'. The implications of these observations are discussed in relation to the growth habits of the respective cultivars in the field. The results showed that measurement of chlorophyll fluorescence was an effective means of screening chilling tolerance of cucumber plants. Furthermore, the study on the chlorophyll fluorescence induction and fluorescence quenching charactersitics showed that low temperature could accelerate inhibition of photosynthesis in chilling-sensitive plants, by limiting Calvin cycle activity and disrupting, in part, the energy dissipation mechanims of the photosystem II.

• 한국식품과학회지
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• 제21권1호
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• pp.52-57
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• 1989

보리 전분입을 구성하는 대입자와 소입자의 물리, 화학적 차이에 관해서 비교하였다. 대입자의 직경은 약 $28-30{\mu}m$이고. 소입자는 약 $6{\mu}m$ 이었으며, Hiproly 전분 입자의 수에 대한 소입자의 수는 95%정도 이었다. 아밀로오즈의 함량은 대입자가 소입자 보다 높게 나타났다. 아밀로오즈의 분자 형태에 관한 대입자 소입자 전분의 고찰로써, iso-amylase처리 전분의 구성성분의 차이, X선 회절도의 차이, 호화특성, 산분해성 등의 검토에 의하면, 아밀로펙틴의 미세결정 구조인 망상구조상에 있어서 대입자와 소입자가 서로 다른 구조를 하고 있으리라 예측된다.

• 한국균학회지
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• 제39권3호
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• pp.155-163
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• 2011

저자들은 한국산 균류의 종다양성 조사를 실시하여 왔으며, 그 중 주름버섯목 의 무명버섯속, 만가닥버섯속, 그늘버섯속, 외대버섯속과 젖버섯속에 속하는 5종 (장미무명버섯, 애만가닥버섯, 흰그늘버섯, 꼬마외대버섯과 치마젖버섯)이 한국미 기록종으로 확인되었다. 미기록종에 대한 미세구조와 특징을 기술하고 한국명을 신칭하여 보고한다. 사용된 모든 표본은 국립농업과학원 식물균류표본보존센타 (HCCN)에 보존되어 있다.

• Radiation Oncology Journal
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• 제13권3호
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• pp.215-223
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• 1995

Purpose : The aim of this study was to assess the effectiveness, survival rate and complication of radiation in nasopharyngeal cancer. Materials and Methods : From January 1980 to May 1989. Fifty patients who had nasopharyngeal carcinoma treated with curative radiation therapy at Kosin Medical Center were retrospectively studied. Thirty seven patients($74{\%}$) were treated with radiation therapy alone(Group I) and 13 patients ($26{\%}$) treated with combination of chemotherapy and radiation (Group II). Age distribution was 16-75 years(median : 45.8 years). In histologic type, squamous cell carcinoma was in 30 patients($60{\%}$), undifferentiated carcinoma in 17 patients($34{\%}$), and lymphoepithelioma in 3 patients($6{\%}$). According t AJCC staging system. 4 patients($8{\%}$) were in $T_1$, 13 patients($26{\%}$) in $T_2$. 20 patients($40{\%}$) in $T_3$, 13 patients($26{\%}$) in $T_4$ and 7 patients($14{\%}$) in $N_0$, 6 patients($12{\%}$) $N_1$, 23 patients($46{\%}$) in $N_2$, 14 patients($28{\%}$) in $N_3$. Total radiation dose ranges were 5250-9200cGy(median : 7355 cGy) in Group I and 5360-8400cGy(median : 6758cGy) in Group II Radiotherapy on 4-6MV linear accelerator and/or 6-12MeV electron in boost radiation was given with conventional technique to 26 patients($52{\%}$), with hyperfractionation(115-120cGy/fr., 2times/day) to 16 patients($32{\%}$), with accelerated fractionation(160cGy/fr., 2 times/day) to 8 patients($16{\%}$). In chemotherapy, 5 FU 1000mg daily for 5 consecutive days, pepleomycin 10mg on days 1 and 3, and cisplatin 100mg on day 1 were administered with 3weeks interval, total 1 to 3 cycles(average 1.8cycles) prior to radiation therapy. Follow up duration was 6-140 months(mean : 58 months). Statistics was calculated with Chi-square and Fisher's exact test. Results : Complete local control rates in Group I and II were $75.7{\%},\;69.2{\%} Overall 5 year survival rates in Group I and II were $56.8{\%},\;30.8{\%}$. Five year survival rates by histologic type in Group I and II were $52.2{\%},\;14.3{\%}$ is squamous cell carcinoma and $54.5{\%},\;50{\%}$ in undifferentiated carcinoma. Survival rates in Group I were superior to those of Group II though there were not statistically significant. In both group, survival rates seem to be increased according to increasing total dose of radiation up to 7500cGy, but not increased beyond it. There were not statistically significant differences in survival rates by age, stage, and radiation techniques in both group. Twenty four patients($48{\%}$) experienced treatment failures. Complications were found in 12 patients($24{\%}$). The most common one was osteomyelitis(4 patients, $33.3{\%}$) involving mandible (3 patients) and maxilla(1 patient). Conclusion : Chemotherapy in combination with radiotherapy was found to be not effective to nasopharyngeal cancer and the survival rate was also inferior to that of radiation alone group though it was statistically not significant due to small population in chemotherapy combined group.

• Parasites, Hosts and Diseases
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• 제36권3호
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• pp.207-212
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• 1998

질편모충 7개 분리주 (국내분리주 UT8, KT6, UT-Kim 및 fr-Lee, 외국 분리주 CDC85, IR78 및 NYH286주)의 유전학적 차이점을 관찰하고자 Southemhybridization을 하였다. 탐침 (probe) 은 질편모충 DNA에 있는 반복적인 염기서열을 기초로 하여 337 bp의 탐침을 제작하였다. 질편모충 각 분리주를 클로닝하고 각각의 원충을 따로 배양하여 DNA를 분리하여 제한효소를 처리한 후 전기영동하고 Southemhybridization을 하였다. 질편모충 분리주에 관계엄이 11개 내외의 븐회이 관찰되었다. 콜로니가 2개 형성된 KT8, IR78 및 KT-Lee 분리주에서는 클로닝하기 전의 분리주와 클로닝하여 형성된 콜로니를 배양한 질편모충에서 같은 bandpattem이 관찰되었다. 사용된 모든 질편모충을 bandpattem에 따라 3군으로 나눌 수 있었는데, KT8 분리주는 국내 분리주인 KT6, KT-Kim 분리주와 같은 band pattern을 보여 1 kb, 1,2 kb, 1.6 kb, 1.9 kb, 2.3 kb, 2.7 kb, 3.2 kb, 3.4 kb, 3.8 kb, 4.9 kb 및 6.0 kb의 11개의 공통 분획을 보였다. 외국분리주로 metronidazole에 내성인 IR78 분리주는 국내 분리주인 fr-Lee 분리주와 같은 분획을 보여 1 kb, 1.2 kb, 1.6 kb, 1.8 kb, 2.1 kb, 2.5 kb, 2.7 kb, 2.9 kb, 3.4 kb, 5.0 kb 및 6.0 kb의 분획을 보였으며 IR78과 같이 약제 내성이 있다고 알려진 CDC85의 경우 IR78, KT-Lee 분리주와 비슷한 분획을 보였으나 2.9 kb가 없고 3.2 kb의 분획이 관찰되었다. 세번째 군에 해당되는 NYH286주는 12개의 분획을 보였는데 IR78, KT-Lee 분리주와 유사한 분획을 보였으나 그 차이점 은 6.0 kb 대신 6.2 kb를, 2. 1 kb 대신 2.0 kb와 2.2 kb를 나타냈다. 이상의 결과로 질편모충 여러 분리주의 유전학적 다양성이 관찰되었다.

• 대한치과교정학회지
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• 제33권4호
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• pp.247-257
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• 2003

골격성 II급 1류 부정교합을 치료하는 방법으로 Activator, FR(Functional regulator), Headgear, Herbst 장치, Twin-block등의 많은 장치가 사용되어진다. 이러한 장치를 사용할 때 기대하는 가장 바람직 한 효과는 상악골의 수평적, 수직적 성장의 억제와, 하악골의 성장이 촉진되어 바람직한 골격적 관계를 가지게 되고 이러한 토대 위에 치아들이 적절하게 배열되는 것일 것이다. Teuscher장치는 Headgear의 상악골의 전하방 성장억제작용과 Activator의 하악골 성장촉진 작용을 동시에 가질 수 있도록 고안된 장치로서 실제 임상 중에 이러한 효과가 잘 구현될 수 있는지를 평가하기 위하여 성장기 남녀 각각9명(평균연령 남자 8세 11개월, 여자 9세 4개월)을 대상으로 Teuscher appliance를 평균 남아는 평균10개월, 여 아는 평균 11개월간 사용하였으며 이를 대조군과 비교 연구를 시행하였고 그 결과는 다음과 같았다. 1. 상악골의 전방 성장을 효과적으로 억제하여 주었다. 2. 상악 dentoalveolar complex의 전하방 성장을 억제하여 주었다. 3. 하악골의 전방 성장 촉진을 관찰하지 못하였다. 4. Overjet, overbite, molar key 개선에 효과적이었다. 5. 장치의 사용으로 상순의 돌출도의 개선과 안모가 향상되었다.

• Journal of the Korean Wood Science and Technology
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• 제37권5호
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• pp.434-439
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• 2009

This study investigates the thermal properties of nanocomposites prepared from poly(lactic acid) (PLA), wood flour (WF) and montmorillonite (MMT) by melt compounding with a twin screw extruder. In order to enhance the mechanical properties of PLA/WF composites, maleic anhydride grafted PLA (MAPLA) is synthesized as a compatibilizer. MAPLA prepared in the laboratory is characterized using FR-IR. From SEM microphotographs, the presence of MAPLA has a positive effect on the mechanical properties of WF-reinforced PLA composites. The addition of WF/MAPLA into neat PLA increased the glass transition temperature ($T_g$). The addition of 1 to 5 wt% MMT into PLA/WF/MAPLA composite decreases the $T_g$. The cold crystallization temperature ($T_{cc}$) was decreased by the addition of MMT. The MMT could act as effective nucleating sites of PLA crystallization. The thermal stability evaluated by thermogravimetric analysis (TGA) is improved with the contents of MMT up to 3 wt%.