• 제목/요약/키워드: regrowth

검색결과 393건 처리시간 0.028초

조기낙엽에 따른 참다래(골드러쉬) 무착과 유목 액아의 발아와 착화 (Regrowth of Buds and Flower Bud Formation in Kiwifruit as Affected by Early Defoliation)

  • 곽용범;김홍림;채원병;이재한;이응호;김진국;이용복
    • 한국환경농학회지
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    • 제32권3호
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    • pp.201-206
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    • 2013
  • 본 연구는 태풍에 의한 참다래 (골드러쉬) 조기 낙엽이 무착과 유목의 액아 발아와 착화에 미치는 영향을 분석하기 위해서 7, 8, 9, 및 10월에 인위적인 적엽처리를 하였다. 먼저 당해연도 액아의 재발아는 7월 적엽처리에서는 무처리의 23.2%와 마찬가지로 높은 재발아율을 나타냈다. 또한 8월의 경우 무처리의 재발아율은 5.8%로 낮았지만 적엽처리구는 17.23%의 높은 재발아율을 나타냈다. 하지만, 9월 적엽처리는 무처리의4.2%와 비슷한 낮은 재발아율을 나타냈으며, 10월 적엽처리에서는 재발아가 전혀 되지 않아 액아가 완전히 휴면에 진입한 것으로 판단되었다. 적엽처리에 의한 익년 착화율은 적엽시기와 적엽률에 따라 큰 영향을 받았다. 적엽 시기 중 7, 8, 9월에 75% 및 100% 적엽처리구는 무처리에 비해 유의성 있는 착화율 감소를 보인 반면, 10월 적엽처리는 적엽률에 관계없이 착화율에는 영향을 미치지 않는 것으로 나타났다. 그리고 착화 신초 한 개에 맺히는 꽃봉오리 수의 경우 75% 이상 적엽이 될 경우 무처리에 비해 절반 이하로 감소 되었다. 이와 같은 결과는 7월과 8월의 경우 적엽에 의해 꽃눈의 원기형성이 진행되어야할 액아의 재발아율이 높아 원기 형성이 감소했기 때문이며, 9월과 10월은 액아의 꽃눈 원기 형성은 어느 정도 이루어졌으나 광합성 산물 생산을 위한 잎의 부족 또는 부재로 저장양분 축적이 부족하여 이듬해 봄 꽃눈의 형태적 분화가 감소되었기 때문인 것으로 판단된다.

이탈리안 라이그라스와 청보리 춘파 재배에서 조기 수확이 수량과 사료가치 및 재생에 미치는 영향 (Effect of Early Harvest on the Forage Yield, Quality and Regrowth of Italian Ryegrass and Barley Sown in Early Spring)

  • 서성;김원호;김기용;정민웅;최기준;박형수;이종경
    • 한국초지조사료학회지
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    • 제31권1호
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    • pp.39-46
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    • 2011
  • 본 연구는 양질 월동 사료작물의 춘파 재배시 조기수확에 따른 생산성과 재생특성을 구명하고자 국내 품종인 이탈리안 라이그라스(IRG) 조생종인 Kowinearly, 중생종인 Kowinmaster, 청보리 품종인 유연, 그리고 Kowinearly + 유연혼파 및 Kowinmaster + 유연 혼파 등 5처리를 두고, 수원 국립축산과학원에서 2009년 3월 2일에 파종하여 1차 수확은 5월 26일(Kowinearly 출수후기, Kowinmaster 출수기, 청보리 호숙초기), 재생수량은 6월 29일에 조사하였다. IRG Kowinearly의 출수기는 5월 16일, Kowinmaster는 5월 22일, 청보리는 5월 13일이었다. 1차 수확 시 건물률은 13~18%로 건초나 사일리지 조제를 위해서는 상당시간의 예건이 필요하였다. 1차 수확 시 조단백질 함량은 IRG에서 17% 내외로 청보리의 12%에 비해 크게 높았으며, 건물 소화율도 IRG에서 80% 내외로 청보리의 72.6%에 비해 크게 높았다. 1차 수확 시 건물 수량은 청보리와 IRG + 청보리 혼파구에서 유의적으로 많았으며(p<0.05), 재생수량은 IRG에서 많았다(p<0.05). 총 건물수량, 조단백질 수량, 가소화 건물수량은 조생종 Kowinearly를 제외하고는 유의적인 차이는 없었으나 중생종 Kowinmaster + 유연 혼파구에서 각각 11,628 kg, 1,669 kg, 8,457 kg/ha으로 가장 많았다. 이상의 결과를 종합하여 볼 때, IRG와 청보리의 춘파는 추파에 비해 출수와 수확기가 늦고 생산량은 낮으나 이른 봄 파종도 충분히 가능하다고 평가되었으며, 조기수확시 생산량은 청보리와 Kowinmaster + 유연 혼파구에서 많았고, 춘파재배시 조기수확에 의한 IRG의 재생은 양호하였다. 또 춘파에서도 IRG와 청보리의 혼파효과가 인정되었으며 후작물 파종에 영향을 주지 않는다면 5월보다는 6월 수확이 바람직하였다.

개심술후 후두부에 발생한 국소 탈모증6례 보고 (Occurrence of Alopecia After Open Heart Surgery [6 Cases Report])

  • 임진수
    • Journal of Chest Surgery
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    • 제18권2호
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    • pp.279-282
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    • 1985
  • Occipital alopecia after Open Heart Surgery under the Cardiopulmonary bypass is an uncommon minor complication. We had experienced Occipital alopecia in 6 cases after Open Heart Surgery. The cause of the alopecia was transient circulatory disturbance due to pressure effect of the patient`s head and intraoperative hypotension. The prodromal symptoms of the alopecia were erythema, itching, and watery discharge, but some patients showed non-specific symptoms. The common site of the alopecia was right occipital region and the size was 2-4 cm in diameter. The regrowth of the hair was completed at postoperative 3 to 5 months without specific treatment except conservative treatment. Fortunately the postoperative alopecia is a self-limiting condition, and spontaneous regrowth of hair is the rule without other complications.

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미세구조 분석을 이용한 저밀도 결함을 가진 GaN계 반도체 연구 (The study of GaN-based semiconductors with low-defect density by microstructural characterization)

  • 조형균
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.1
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    • pp.424-427
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    • 2003
  • We have investigated the microstructural analysis of epitaxial lateral overgrowth (ELO), pendeoepitaxy (PE), and superlattice structures used as technology for the reduction of structural defects like dislocation in nitride semiconductors using transmission electron microscopy. We confirmed that the regrowth process such as ELO and PE is very effective technique on the reduction of threading dislocation (less than $10^6/cm^2$) in the specific area. However, to decrease the defect density in the whole nitride films and the suppress the generation of defect by regrowth, we should find the optimized conditions. Besides, the process using double PE and AlGaN/GaN superlattice structure showed no effect on the defect reduction up to now.

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중추신경계 신경성장 억제 신호 (Neurite Growth Inhibitory Signals in CNS)

  • 김식현;권혁철
    • The Journal of Korean Physical Therapy
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    • 제11권3호
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    • pp.133-140
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    • 1999
  • Why does the CNS not regenerate after injury? The failure of axonal regeneration in the CNS after injury is not due to an inherent inability of these neurons to regrowth axon. Recently, an inhibitory substrate effect of CNS has been discovered which could be directly invoked in the lack of regeneration. The failure of axon regrowth in the CNS is crucially influenced by the presence of neurtie growth inhibitor NI35/250 and possibly also by molecules such as myelin associated glycoprotein(MAG) and chondroitin sulphate proteoglycans(CSPGs). The application of the monoclonal antibody IN-1, which efficinetly neutralizes the N135/250 inhibitory molecules. This new finding has a strong impact on the development of, a new neuroscienctific research directed to stimulate axonal regeneration. In this review summarize the current knowledge on the factors and molecules involved in the regeneration failure.

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Testing the effects of natural products on hair growth in stumptailed macauqe

  • De-pei Tan;Qui
    • 대한화장품학회지
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    • 제21권2호
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    • pp.73-93
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    • 1995
  • The effect of natural products(drug 1, drug 2) on hair growth of frontal scalp of ten stumptailed macaques was investigated in period of 12 months. Drug 1 conteins extracts of Angelica gigantis Radix ok. and drug 2 conteins extracts of Corm Fructus, etc. Photographs of close view of the frontal scalp were taken once every month and folliclogram analysis has been done at pretretment and on 5th, 10th and 12th month after treatment. Drug 1 showed only slight effect or no effect on hair growth and drug 2 exhibited a significant degree of hair regrowth, but the control group exhibited a definite degree of regrowth and increasing density of vellum hair. Also, the physiological parameters, such as body weight, blood pressure, heart rate, serum levels of androgens, hematological measures during the treatment of drug 1, drug 2, and vehicle, were within normal limits. It indicates the drug 2 is the possible appearance of new summit of hair growth.

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예취빈도 및 질소시비수준이 Reed Canarygrass의 저장탄수화물함량에 미치는 영향 (Effect of Cutting Freqensy and Leavel of Nitrogen Fertilization on Carbohydrate Resreves of Reed Canarygrass)

  • 서흥종;육완방
    • 한국초지조사료학회지
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    • 제12권2호
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    • pp.89-97
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    • 1992
  • This experiment was attempted to investigate the effects of growing stage, cutting frequency and the level of nitrogen fertilization on the change of carbohydrate reserves in reed canarygrass(Pha1aris arundinacea L.). The results obtained were as follows: The amount of carbohydrate reserves appeared to markedly decrease up to critical level after the cutting in hot and dry weather season. During the growing stage, the amount of carbohydrate reserves decreased just after the cutting and also during the period of flourishing elongation of reed canarygrass. However, it began to increase sharply from the end of September for wintering. Two cutting system showed the highest mean value(19.53 %) of carbohydrate reserves and those of three, five and four cutting system was 15.32 %. 14.73 %, and 14.60 % respectively. Reed canarygrass with no nitrogen fertilization resulted in 17.17% of carbohydrate reserve, however there was no singificant difference among various levels of nitrogen fertilization. In respect of regrowth. 3 cutting system showed the most effective cutting frequency, however 4 or 5 cutting system had a decreasing tendency of regrowth.

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Efficient Cryopreservation of In Vitro Grown Shoot Tips of Strawberry (Fragaria × ananassa Duch.) Germplasm Using Droplet-Vitrification

  • Bae, Jinjoo;Lee, Sun-Yi;Song, Jae-Young;Lee, Jung-Ro;Yoon, Munsup;Yi, Jung-Yoon;Kim, Haeng-Hoon;Lee, Young-Yi
    • 한국자원식물학회지
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    • 제34권6호
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    • pp.600-607
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    • 2021
  • Cryopreservation method using a droplet vitrification was applied to the thirty-one strawberry accessions of in vitro grown shoot tips. A protocol with 0.3 - 0.5 M preculture followed by C4 loading and B1 dehydration solutions efficiently implemented cryopreservation of twenty-six strawberry accessions. The highest regrowth rate was 85.8% for PHS0007 and others were ranged between 85.8% and 21.0%. A slightly modified protocol was applied to five accessions. With these two protocols, twenty-eight accessions obtained more than 40% regrowth rate. This study showed that the droplet vitrification method was able to practically implement cryopreservation of in vitro grown shoot tips of broad range of strawberry germplasm (105).

Penile neoplasm associated with Equus caballus papillomavirus type 2 infection in a miniature Appaloosa: a case report

  • Sang-Kyu Lee;Jungho Yoon;Youngjong Kim;Inhyung Lee
    • 대한수의학회지
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    • 제64권1호
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    • pp.8.1-8.5
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    • 2024
  • An 18-year-old miniature Appaloosa stallion presented with 6 months of history of sanguineous crusts on medial hind limbs and discomfort of micturition. Cauliflower-like and small masses were treated with cryotherapy for 6 months, but the regrowth of masses occurred. Subsequently, local excision via laser and topical treatment with 5% 5-fluorouracil for 5 months were followed. However, the horse was euthanized 4 months later due to regrowth of the masses. The mass was diagnosed as penile papilloma with cellular atypia and Equus caballus papillomavirus type 2 (EcPV-2) DNA was detected. This is the first report of equine penile neoplasm with EcPV-2 infection in Asia.