• Title/Summary/Keyword: dry-heat treatment

검색결과 247건 처리시간 0.031초

2차 가열에 의한 국소의치상의 변형에 관한 실험적 연구 (EFFECT OF SECONDARY HEAT TREATMENT ON DIMENSIONAL CHANGES OF ACRYLIC RESIN PARTIAL DENTURE BASE)

  • 장병건;이호용
    • 대한치과보철학회지
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    • 제27권1호
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    • pp.193-211
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    • 1989
  • The purpose of this study was to investigate the effect of secondary heat treatment on dimensional changes of acrylic resin partial denture base. For this study, 6 specimens were made: 2 groups of 2 specimens, each was treated with $125^{\circ}C$ dry heat and glycerine heat for 3 minutes, and the others were prepared for control group. The change of the internal diameter of specimens were measured after 3 hrs, 1 day, 1 week, 2 weeks, 4 weeks by three-dimensional space analyzer. The results were as follows : 1. All of the acrylic resin denture bases showed tissue ward thermal contraction. 2. Thermal contraction of the mesial area reinforced with metal framework was lesser than that of the distal area without metal framework. 3. Thermal contraction of the lingual flange reinforced with metal framework occured more slowly than that of the buccal flange without the metal framework. 4. The thermal contraction of dry heat treated acrylic resin base, compared to glycerine heat group, was moderately greater and occurred acutely.

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보관조건과 열처리에 따른 복합레진의 표면경도에 관한 연구 (A STUDY ON SURFACE HARDNESS OF COMPOSITE RESINS ACCORDING TO STORAGE CONDITON AND HEAT TREATMENT)

  • 강승훈;민병순
    • Restorative Dentistry and Endodontics
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    • 제19권1호
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    • pp.194-204
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    • 1994
  • The purpose of this study was to evaluate the surface hardness of composite resins according to heat treatment. storage condition and storage time. In this study. two kinds of composite resin inlays and one kind of conventional posterior composite resin were used as experimental materials. One hundred eighty composite resin specimens were constructed from composite resin inlays and conventional posterior composite resin. The conditions of this study were heat treatment. storage condition and storage time. Hardness readings were taken from the top surface of each samples using the Vickers microhardness tester(MHT-l. Matsuzawa. Japan}. The following results from this study were obtained: 1. Regardless of storage condition. both composite resin inlay and conventional posterior composite resin have a higher surface hardness under heat treatment than not. 2. Composite resins with heat treatment have a higher surface hardness under dry storage than under water immersion. 3. In case of Clearfil Photo Posterior and Brilliant Enamel with heat treatment. there was no significant difference with time. but Clearfil CR Inlay with heat treatment. there was statistical difference after 24 hours. 4. Surface hardness of composite resins with coarse hybrid type was higher than that of composite resin with fine hybrid type.

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태음인(太陰人) 만성 특발성 두드러기 환자 치험 1예 (A Case Study of Taeeumin's Chronic Idiopathic Urticaria Patient)

  • 임미경;송정모
    • 사상체질의학회지
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    • 제20권3호
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    • pp.190-198
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    • 2008
  • 1. Objectives The purpose of this case study is to evaluate the effects of Sasangconstitutional diagnosis and treatment of chronic idiopathic urticaria patient who was diagnosed Taeeumin Dry-Heat Syndrome(煥熱證). 2. Methods Chronic idiopathic urticaria patient was diagnosed Taeeumin Dry-Heat Syndrome(煥熱證) based on their Nature & Emotion(性情), physical characteristics, symptoms. She was medicated Cheongsimyeonjatang(淸心蓮子湯). 3. Results and Conclusions Chronic idiopathic urticaria patient who was treated with Cheongsimyeonjatang(淸心蓮子湯) showed improvement in urticaria symptom and general condition. This case study describe the effectiveness on Chronic idiopathic urticaria symptom by using Cheongsimyeonjang(淸心蓮子湯).

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추조(秋燥)에 관(關)한 문헌적(文獻的) 고찰(考察) (Literature study on autumn-dryness syndrome)

  • 한재수;권혁성;이주희;정승기;이형구
    • 대한한의학회지
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    • 제15권2호
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    • pp.321-333
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    • 1994
  • 1. Autum-dryness syndrome(秋燥) is caused by dry-warm or dry=-cool weather condition when lower-warmer Eumfen(下焦陰分) was injured by jung hyoul hatal(精血下脫) or taking medicines of dryness in autumn. 2. The symptoms of autum-dryness syndrome are headach, fever, chilling, anhydrosis, dry cough, tinnitis, dry lip, dry skin, chest discomfort in cool-dryness syndrome(凉燥) and headach, fever, dry cough, paroxymal cough, dry skin, chest pain, polydipsia, tinnitis, eye redness, sore throat in heat-dryness syndrome(溫燥). 3. Hyangsochongsitang(香蘇蔥頭湯) chn be applied for terating cool-dryness syndrome(凉燥) and chungjogoopyetang(淸燥救肺湯) for heat-dryness syndrome(溫燥). Sang Hang Tang(桑杏湯) can be administered when the evils located in the upper-warmer, and Yukmihwan(六味丸) can be administered when located in the lower-warmer(下焦) 4. According the determination of treatment based on the differentiation of symptoms and signs. When the symptoms of Weifen syndrome(衛分證) are headach, fever, dry lip or chilling or dypsia and the treatment of weifen syndrome apply Hangsosan(行蘇散) or Sang hang tang(桑杏湯). When the symptoms of Qifen syndrome(氣分證) are tinnitis, eye redness, sore throat, chest discomfort, polydipsia, dry cough, watery diarrhea, constipation and Jibaekjihwang(知栢地黃丸) when Ohingulpitang(五仁橘皮湯) Chungjogupyetang(淸燥救肺湯) can are applied for treating Qifen syndrome(氣分證). When the symptoms of younghylfen syndrome(營血分證) are dry cough, watery diarrhea, dypsia, chest discomfort, hematemesis, epistaxis and agyohwang keum tang(阿膠湯) Oknyujun(玉女煎) can be applied for treating Younghyulfen syndrome(營血分證).

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지료조성에 따른 종이의 사이징 특성 (The Influence of Paper Stock Type on Characteristics of Sizing)

  • 정상진;김봉용
    • 펄프종이기술
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    • 제37권2호
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    • pp.11-20
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    • 2005
  • This study was carried out to investigate the influence of paper stock type and heat treatment on sizing effect. Various types of pulps were used to make handsheets sized internally with AKD(alkyl ketene dimer) and externally with CMC(carboxyl methyl cellulose). Most of the handsheets were treated with heat by dry oven $(100^{\circ}C,\;30min)$ to evaluate the effect of heat treatment on sizing development. Internal sizing development of newsprint was very bad, but the effect of heat treatment was much higher than those of NBKP, BCTMP. In case of surface sizing, newsprint was more effective compared to the other pulps. Considering above mentioned results, it seems that internal sizing slows down water into paper by molecular diffusion much more than capillary penetration, but surface sizing slows down capillary penetration. With regard to density, a higher thickness sheets showed high heat treatment effect on sizing, therefore it assumed that heat treatment effect on sizing had very close relationship with sheet density.

가공공정 중 열처리 온도에 의한 PET/PBT 혼섬사 직물의 형태와 태의 변화 (The Effect of Heat Treatment Temperature on the Dimension and Handle of PET/PBT Fabric)

  • 신혜원
    • 한국의류학회지
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    • 제27권5호
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    • pp.582-587
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    • 2003
  • To examine the effect of heat treatment temperature in finishing process on PET/PBT Fabric, PET/PBT Fabrics were treated at different relaxing temp., pre-set temp., and final-set temp.. The dimensions such as thickness and density were measured, and the handles were evaluated by Kawabata system. In relaxing which was wet heat treatment, thickness and bulkiness were increased, and NUMERI, FUKURAMI, SOFUTOSA, and THV also were increased but KOSHI was decreased with elevating temperature. With elevating pre-set temp., thickness and bulkiness were decreased, but KOSHI was increased. NUMERI, FUKURAMI, SOFUTOSA, and THV were the best at 180$^{\circ}C$ pre-set treatment. In final-set which was dry heat treatment like pre-set, thickness, bulkiness, NUMERI, HUKURAMI, SOFUTOSA, and THV were decreased, but KOSHI value was increased with elevating temperature. Therefore the best heat treatment condition was 130$^{\circ}C$ relaxing, 180$^{\circ}C$ pre-set, and 160$^{\circ}C$ final-set. And the handle of PET/PBT Fabric was affected much more by relaxing temp. than pre-set temp. and final-set temp.

한국산 시판 한지의 열화 특성 (Aging Characteristics of Marketing Korean Paper(Hanji))

  • 박성철;최미숙;임현아
    • 보존과학회지
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    • 제25권2호
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    • pp.161-169
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    • 2009
  • 본 연구에서는 한국산 시판 4종 한지의 강제적 열화 조건인 습 건열처리를 통하여 한지의 광학적 물리적 특성의 변화를 측정, 비교 검토하여 봄으로써, 현재 시판 한지의 안정성을 규명하고자 하였다. 인공 열화 전후의 비교에서 광학적 물리적 성질은 습열처리보다 건열처리의 경우에서 더욱 감소폭이 컸는데, 백색도, whiteness는 흑피로 제조된 순지에서 가장 크게 감소하였고 불투명도 역시 전체적으로 상승하는 경향 속에 흑피에서 가장 높게 상승하였다. 열단장은 백피의 경우가 최종적으로 가장 높은 강도를 나타냈으며, 인열강도는 흑피에서 급속히 감소하였다. 파열강도는 습열처리의 경우, 열화 후반부에서는 백피와 흑피의 값이 거의 비슷하였으나 내절도는 백피의 경우가 다른 펄프보다 월등히 높아 단순비교는 어려웠지만 열화처리에도 비교적 높은 내절도를 나타내었다. 따라서 흑피가 백피에 비해 열화에 약하다는 것을 알 수 있었다. 또한 이외 다른 펄프를 혼합한 경우는 강도면에서 크게 감소함을 알 수 있었다. 결론적으로 한지는 습도에 비해 온도에 더 민감한 것으로 나타났다. 그러나 가장 높은 관심을 가졌던 묵즙에 대한 농도 및 색상의 열화는 특별한 경향을 발견하지 못하였다.

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원지의 사이징 특성이 도공액의 침투에 미치는 영향 (The Influence of Base Paper Sizing on Coating Penetration into Paper)

  • 김봉용
    • 펄프종이기술
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    • 제45권1호
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    • pp.21-26
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    • 2013
  • The influences of heat treatment and surface sizing on coating penetration were studied using two types of commercial base papers. Dry oven was used for heat treatment and laboratory rod draw down coater was used for surface sizing and coating application. Coating penetration was evaluated by measuring the roughness of the backside of coating layer. The backside of the coating was exposed by dissolving the fibers in a cupriethylenedimine(CED) solution. The results showed that both heat treatment and surface sizing were the effective methods to increase sizing degree and to reduce coating penetration.

상폐(傷肺)에 의(依)한 비출혈(鼻出血)의 문헌적(文獻的) 고찰(考察) (A Bibliographic Study on The Research of nosebleeding by damaged lung)

  • 김성현
    • 대한한방내과학회지
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    • 제12권1호
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    • pp.45-55
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    • 1991
  • It has been known that the nosebleeding is a king hemorrhage occured to be damaged yang-rak (陽略) & lung. the results obtained were as follows; 1. The cause of nosebleeding were divided internal external, these were lung-heat(肺實熱), wind-heat(風熱), dry-heat(煥熱), wind-cold(風寒), summer-heat(暑熱), and those were transporting of Liver-fire(肝火犯肺), Liver-kidney-fire(肝腎陰虛熱傷肺), Stomach-fire(胃火熾盛), Heart-fire(心火千肺). 2. The treatment of external ; Chungpaesulyul(淸肺泄熱), Yanghyuljihyul(凉血止血), Sanpungchungyul(散風淸熱), Jaeumchungjo(滋陰淸煥). 3. The treatment of internal ; Chungkansahwa(淸肝瀉火), Yanghuljihyul(凉血止血), Jayumganghwa(滋陰降火), Chunguysahwa(淸胃瀉火). The cause of nosebleeding was almost heat (fire), and the treatment were Sanpyo(散表) & Chungri(淸裏).

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품질 보증을 위한 멸균법이 목단피의 패오놀 함량에 미치는 영향 (Effects of Sterilization for Quality Control on the Content of Paeonol in Moutan Radicies Bark)

  • 이용수;신운섭;조소연;제금련;이효민;정춘식
    • 약학회지
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    • 제49권2호
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    • pp.180-184
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    • 2005
  • The purpose of this study was to develop the best methods to sterilize Moutan Root Bark which is frequently used as a herbal medicine, and known to have high susceptibility to m icrobial contamination. We used dry heat, gamma irradiation and alcohol gas treatment for sterilization, and evaluated these methods in terms of the followings; I) the efficacy of sterilization, and ii) the chemical alteration of a major component of the harbal medicines. Treatment with dry heat effectively got rid of contaminated microorganisms, and did not significantly alter the content of paeonol. However it seriously changed the color and morphology which are an essential criterion to estimate a measure of quality of medicinal herbs. Treatment with gamma irradiation showed a strong sterilizing effect, and no alteration of the content of paeonol, color and morphology. Alcohol gas treatment resulted in similar effects as those in gamma irradiation. Collectively, these results suggest that appropriate sterilizing methods to guarantee the microbial quality of this herbal medicine may be those using gamma irradiation or alcohol gas.