• 제목/요약/키워드: cold treatment

검색결과 1,640건 처리시간 0.034초

국내 육성 신품종 딸기의 모주 저온처리가 런너와 자묘의 발생에 미치는 영향 (Effect of Cold Treatment for Mother Plants of New Strawberry Cultivars Bred in Korea on the Production of Runners and Daughter Plants)

  • 전하준;전의환;강수인;배근혜
    • 생물환경조절학회지
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    • 제24권1호
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    • pp.8-12
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    • 2015
  • 딸기재배에서는 육묘가 차지하는 비중이 크다. 육묘의 제일 첫 단계는 모주의 관리부터 시작되는데, 재배농가에서는 가능한 한 건강한 다수의 자묘를 확보하는데 노력을 기울인다. 자묘의 발생에 관여하는 제한요인은 여러 가지가 있지만, 딸기의 모주는 겨울 동안 충분한 휴면을 하는 것이 중요하다. 충분한 저온을 경과한 모주에서 많은 런너와 자묘가 발생한다는 사실은 알려져 있지만 국내에서의 연구결과는 전혀 볼 수가 없다. 최근에 국내에서 육성된 품종을 이용한 딸기 모주의 저온경과의 효과에 대한 연구가 필요하여 본 실험을 실시하였다. 국내 육성 품종인 '설향', '매향', '싼타' 딸기를 이용하여 2012년과 2013년 2년간 반복하여 실험을 하였다. 모주의 온도처리는 $5^{\circ}C$ 이하에서 1,000시간 이상 경과한 저온 처리 묘(이하 저온처리묘), $5^{\circ}C$ 이하에서 1,000시간 이상 경과 시킨 후 온상에서 2주간 보온한 저온+보온처리 묘(이하 저온+보온처리 묘), 겨울 동안 온상에서 보관된 온상 묘, 봄철까지 수확을 진행 한 재배 묘의 4가지 처리구로 구분하였다. 2012년의 실험 결과에서는, '설향' 품종은 저온, 저온+보온 처리구 그리고 재배 처리구에서 자묘수가 많았고, 온상 처리구에서 유의하게 적었다. '매향'은 저온+보온 처리구가 월등하게 자묘가 많았고, 온상 처리구와 재배 처리구는 유의하게 적었다. '싼타'는 모든 처리구에서 유의한 차이가 없었다. 2013년의 실험결과에서는 '설향'과 '매향' 품종은 저온 처리구와 저온+가온 처리구가 온상 처리구와 재배 처리구 보다 자묘 발생이 통계적으로 유의하게 많았다. '싼타'도 비슷한 경향을 나타내었는데, 저온+보온 처리구는 온상 처리구보다 통계적으로 유의하게 자묘수가 많았다. 본 실험의 결과에서 실험년도와 품종 간에 차이는 있었지만 모주를 겨울동안 충분하게 저온을 거치도록 하는 것이 자묘 발생에 유리한 것으로 판단되었다.

고주파열처리에 의한 자동차용 고강도 강판의 기계적 성질변화 (Mechanical Properties of High Stength Sheet Steels for Auto-Body by Induction Heat Treatment)

  • 이두환;윤치상;임종대
    • 열처리공학회지
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    • 제17권2호
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    • pp.73-77
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    • 2004
  • The efforts which increase the strength of the auto-body structure and decrease its weight lead to develop a new concept of part production systems, such as Post-Form Strengthening by induction heat treatment. In this study, several cold and hot-rolled sheet steels were used to find out optimum induction heat treatment conditions. After induction heat treatment, strength of heat-treated sheet steels was increased significantly compared with that of as-rolled steels. From these results, auto-body structure which has more light and safe has been made by using this induction hardening method.

수도(水稻) 품종(品種)의 냉해관련인자(冷害關聯因子) 특성(特性)에 의(依)한 내냉성(耐冷性) 평가(評價) I. 묘(苗)에 인지질(燐脂質)의 지방산(脂肪酸) 조성(組成)과 내냉성(耐冷性) (Evaluation of Cold Tolerance in Rice Cultivars by the Characteristics Related to Chilling Injury I. Fatty Acid Composition of Phospholipid and Chilling Injury of Seedlings)

  • 석순종;하호성
    • 한국토양비료학회지
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    • 제24권2호
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    • pp.144-151
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    • 1991
  • 수도품종(水稻品種)의 내냉성관련인자(耐冷性關聯因子)로서 생체막구성물질(生體膜構成物質)에 중요(重要)한 역할(役割)을 하는 인지질(燐脂質)의 지방산조성(脂肪酸組成)과 지방산(脂肪酸)의 불포화비율(不飽和比率)을 증가(增加)시킬 수 있는 경화처리(硬化處理)에 의한 지방산(脂肪酸)의 변화(變化)를 조사(調査)하여 포장(圃場)에서 조사(調査)된 내냉성정도(耐冷性程度)와 비교검토(比較檢討)한 결과(結果)는 다음과 같다. 1. 수도(水稻) 32품종(品種)에서 분리(分離)한 인지질(燐脂質)의 지방조성(脂肪組成)은 Pamitic, Linoleic 및 Linolenic acid가 주(主) 지방산(脂肪酸)이었고, Palmitoleic, Stearic 및 Oleic acid가 소량(少量) 함유(含有)되어 있었다. 2. 저온처리(低溫處理)($15^{\circ}C$, 3일간)한 묘(苗)에서 포화지방산(飽和脂肪酸)인 Pamitic acid의 함량(含量)은 감소하고, 불포화지방산(不飽和脂肪酸)인 Linoleic acid의 함량(含量)은 증가하였다. 3. 지방산(脂肪酸)의 불포화비율(不飽和比率)은 저온처리(低溫處理)를 하므로써 높아졌으며, 내냉성(耐冷性)이 강(强)한 품종(品種)에서 비율(比率)이 높고, 약(弱)한 품종(品種)에서 낮아 내냉성정도(耐冷性程度)와 일치(一致)하는 경향을 보였다. 4. 경화처리(硬化處理)에 의하여 인지질지방산조성(燐脂質脂肪酸組成)중 Pamitic acid는 감소하고, Linoleic acid의 함량(含量)은 증가하였다. 5. 경화처리(硬化處理)를 하므로써 지방산(脂肪酸)의 불포화비율(不飽和比率)은 대조구(對照區)에 비하여 18~24% 증가되었다.

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유채 내한성에 관한 연구 (Studies on the Cold Resistant in Rape, Brassica napus L.)

  • 김일해;권병선;이정일;유익상;김준기;이용보
    • 한국작물학회지
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    • 제22권1호
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    • pp.26-34
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    • 1977
  • 27 lines were selected for the cold resistant lines from the promising lines. The cold resistant lines were chiefly selected from Oro$\times$Norin 16, Oro$\times$Norin 20 and (Yudal$\times$Kongo)$\times$Yudal combination. The varieties of lately maturing showed cold resistantce. Transplanting treatment increased cold resistantce, and early sowing and drill planting also elevated cold resistance in the direct sowing culture. Plants to be cultured on soils with optimum moisture coutent showed higher cold resistance.

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『의학입문(醫學入門)·상한편(傷寒篇)』 유상한(類傷寒) 병증(病症) 10종의 유래와 개념에 대한 연구 (Provenance and Concept of 10 Symptoms of Para-cold Damage(類傷寒) from Yixuerumen(醫學入門))

  • 조학준
    • 대한한의학원전학회지
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    • 제29권4호
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    • pp.17-36
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    • 2016
  • Objectives : This paper seeks to study the provenances of 10 Symptoms of Para-cold damage from Yixuerumen, and discovers the rationality and originality of para-cold damages recognized by Li Chan. Methods : The paper looks through the books referenced by Yixuerumen to investigate the source text for Yixuerumen's Para-cold Damage chapter, and the contents of the referenced books will be compared to that of Yixuerumen. Results : The sources of the 10 symptoms of para-cold damage from Yixuerumen Chapter of Cold Damage can be traced to Leizhenghuorenshu (expectoration, indigestion, rising temperature due to lack of energy, and beriberi), Wang Zhen's Shanghanzhengzhimingtiao Xinzengxuleishanghansizheng(the infection in a boil, blood sattis, caused overexertion, and pox), and Liu Chun's Yujiweiyi's chapter on Common Cold. Here, Li Chan made his own addition of internal damage and damage of overworking. Li Chan seems to have considered para-cold damage not as a type of cold damage but as a "concept relative to the broader range of cold damage." In reflection of this understanding, Li Chan limited the number of categories to ten in accordance with the developmental trace leading from Leizhenghuorenshu to Shanghanzhengzhimingtiao. When we understand para-cold damage as a "concept relative to the narrower range of cold damage," it could be used as a mean as for "Wenbin diagnosis," but Yixuerumen's para-cold damage is only utilized for the "diagnosis of a broader concept of cold damage." Conclusions : Li Chan deserves credits for his academic rationality and originality displayed by the method he used to form para-cold damages where he used real cold damage and para-cold damage as principles, by the division of para-cold damage symptoms into ten provenances, by the creation of the concept of para-cold damage, and by his broad collection of prescription and treatment corresponding to each type.

Transcriptome profiling of rubber tree (Hevea brasiliensis) discovers candidate regulators of the cold stress response

  • Gong, Xiao-Xiao;Yan, Bing-Yu;Hu, Jin;Yang, Cui-Ping;Li, Yi-Jian;Liu, Jin-Ping;Liao, Wen-Bin
    • Genes and Genomics
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    • 제40권11호
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    • pp.1181-1197
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    • 2018
  • Tropical plant rubber tree (Hevea brasiliensis) is the sole source of commercial natural rubber and low-temperature stress is the most important limiting factor for its cultivation. To characterize the gene expression profiles of H. brasiliensis under the cold stress and discover the key cold stress-induced genes. Three cDNA libraries, CT (control), LT2 (cold treatment at $4^{\circ}C$ for 2 h) and LT24 (cold treatment at $4^{\circ}C$ for 24 h) were constructed for RNA sequencing (RNA-Seq) and gene expression profiling. Quantitative real time PCR (qRT-PCR) was conducted to validate the RNA-Seq and gene differentially expression results. A total of 1457 and 2328 differentially expressed genes (DEGs) in LT2 and LT24 compared with CT were respectively detected. Most significantly enriched KEGG pathways included flavonoid biosynthesis, phenylpropanoid biosynthesis, plant hormone signal transduction, cutin, suberine and wax biosynthesis, Pentose and glucuronate interconversions, phenylalanine metabolism and starch and sucrose metabolism. A total of 239 transcription factors (TFs) were differentially expressed following 2 h or/and 24 h of cold treatment. Cold-response transcription factor families included ARR-B, B3, BES1, bHLH, C2H, CO-like, Dof, ERF, FAR1, G2-like, GRAS, GRF, HD-ZIP, HSF, LBD, MIKC-MADS, M-type MADS, MYB, MYB-related, NAC, RAV, SRS, TALE, TCP, Trihelix, WOX, WRKY, YABBY and ZF-HD. The genome-wide transcriptional response of rubber tree to the cold treatments were determined and a large number of DEGs were characterized including 239 transcription factors, providing important clues for further elucidation of the mechanisms of cold stress responses in rubber tree.

THe Effect of Chronic Ehronic Treatment and Cold stress on Catecholaminergic Enzyme activity and mRNA in Rat Brain and Adrenals

  • Lee, Yong-Kyu;Park, Dong-H
    • Archives of Pharmacal Research
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    • 제19권5호
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    • pp.374-380
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    • 1996
  • Sprague-Dawley male rats (150 g) were chronically treated with 5 v/v % ethanol admixed with nutritionally complete liquid diet and fed ad libitum for 3 weeks. One half of each group was exposed to cold stress at 4 ^{\circ}C either for 24 h (for determination of mRNA by in situ hybridization) or for 48 h (for determination of enzyme activity). Chronic ethanol treatment (ethanol) did not affect tyrosine hydroxylase(TH) mRNA level in locus coeruleus(LC) of brain and adrenal medulla(AM) compared to controls. Cold stress showed strong increase of TH mRNA level in LC and AM compared to controls. Pretreated ethanol reduced the increased TH mRNA level by cold stress in LC and AM. Ethanol did not affect TH activity in LC and adenal glands(adrenals). Cold stress increased TH activity in LC but not in adrenals. Pretreated ethanol did not reduce the increased TH activity by cold stress in LC but this result was not shown in adrenals. Phenylethanolamine-N-methyltransferase(PNMT) activity in $C_{1}$$C_{2}$ and adrenals increased only in ethanol treated group. THese results suggest that ethanol does not affect TH mRNA level and activity in LC and adrenals, but increases PNMT activity in $C_{1}$$C_{2}$ and adrenals in normal rat. It is also suggested that pretreated ethanol reduces the magnitude of cold stress response, that is induction of TH mRNA in LC and AM, and does not reduce the protein activation of TH that is also cold stress response in LC.

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고탄소강 열연판재의 미세조직과 냉간압하율에 따른 구상화 속도 및 기계적 특성 (Effect of Microstructure and Cold Reduction Ratio on Spheroidization Rate and Mechanical Properties of High Carbon Steel)

  • 이규동;이수연;하태권;정효태
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2008년도 추계학술대회 논문집
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    • pp.382-385
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    • 2008
  • In the present study, the effect of cold reduction ratio on the spheroidization rate of SK85 high carbon steel sheet was investigated. High carbon steel sheet fabricated by POSCO was soaked at $850^{\circ}C$ for 2 hr in a box furnace and then treated at $570^{\circ}C$ and $670^{\circ}C$ for 10 min in a salt bath furnace followed by water quenching to obtain a fine pearlite structure and coarse pearlite structure. Cold rolling was conducted on the sheets by reduction ratios of 20, 30, and 40 % and heat treatment for spheroidization was carried out at $720^{\circ}C$ for the various time intervals from 1 to 32 hrs. Area fraction of spheroidized cementite was measured with an image analyzer as a function of cold reduction ratios and duration times.

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한냉(寒冷)증상과 냉대하(冷帶下)를 겸한 여고생 월경통(月經痛)에 대한 주자당귀환(酒煮當歸丸)의 효능에 관한 임상적 연구 (Clinical study on the Efficacy Jujadanggui-hwan for Dysmenorrhea with Coldness)

  • 김미진;문덕빈;엄윤경;배경미;이인선
    • 대한한방체열의학회지
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    • 제4권1호
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    • pp.1-14
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    • 2005
  • The purpose of this study is to identify the clinical effects of Jujadanggui-hwan in the treatment of dysmenorrhea with cold hypersensitivity. Jujadanggui-hwan mentioned in Dongeuibogam has an effect on leucorrhea and cold hypersensitivity of hands and feet, lower abdomen and lumbus. Jujadanggui-hwan were prescribed to 24 dysmenorrhea patients with cold hypersensitivity of hands and feet or with leucorrhea three times a day for 13 weeks. After the treatment, numerical index for the pain was obviously reduced 'tot' point 2.12. It means that pain index as the patient can't do everyday occurrences reduce to 3 grad enough to do ordinary experience. So this study shows that Jujadanggui-hwan has remarkable effects on dysmenorrhea with cold hypersensitivity.

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정상 간세포와 간암세포의 플라즈마 특성에 관한 비교연구 (Comparative study of plasma effects on human liver normal and cancer cells)

  • 김대연;권보미;김단비;최원호;신현정
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2008년도 추계학술대회A
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    • pp.1539-1542
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    • 2008
  • Plasma is 4th state of matters, which consists of electrons, neutral, and ionized particles. In biomedical research, cold plasma, which is generated in atmospheric condition, has been applied to disinfect microorganisms such as bacteria and yeast cells. Because of its low temperature condition, the heat-sensitive medical device can be easily sterilized by the cold plasma treatment. In recent years, the effects of plasma on mammalian cells have arisen as a new issue. Generally, plasma induces intensity dependent necrotic cell death. In this research, we investigate the feasibility of cold plasma treatment for cancer therapy by conducting comparative study of plasma effects on normal and cancer cells. We use THLE-2 (human liver normal cell) and SK-Hep1 (human liver metathetic cancer cell) as our target cells. The needle type of cold plasma is generated by the Helium plasma device. Two types of cells have different onset plasma conditions for the necrosis, which may be explained by difference in electrical properties of these two cell types.

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