나리의 상자재배시 재식밀도, 배지 및 양액농도가 생육에 미치는 영향

채수천 한국화훼산업육성협회 2008 화훼연구 Vol.16 No.1

나리의 상자재배시 재식밀도, 배지 및 양액농도가 생육에 미치는 영향에 대하여 조사 분석한 결과는 다 음과 같다. 재식밀도가 나리의 맹아에 미치는 영향은 14, 18 및 22구 처리가 1일 정도 맹아가 빨랐고, 개 화는 22구 처리에서 가장 빨랐고 6구 식재처리가 가 장 늦어 재식밀도가 높을수록 개화가 빠른 경향을 보 였다. 재식밀도가 높을수록 초장생장이 증가되어 절화 장이 길었으나 절화중, 화수 등 절화품질은 재식밀도가 낮을수록 증가하였다. 블라스팅이나 생리장해도 22, 18 및 14구순으로 재식밀도가 높을수록 발생율이 증가되 었다. 구고, 구폭, 구중, 인편수, 인편중 모두 22구 처 리를 제외한 모든 처리에서 정식전보다 우수한 결과를 나타냈으며 재식밀도가 높아질수록 구근비대가 좋지 않 았고 부패율도 증가하였다. 배지성분 변화는 구근 정식 전에 비해 pH는 모든 처리에서 낮아졌으며, 재식밀도 가 높을수록 더욱 낮아지는 경향을 나타내었다. P, K, Ca, Mg 성분은 정식 전에 비해 높아졌으나, K와 Ca 성분은 재식밀도가 높을수록 오히려 낮아지는 경향을 나타내었다. 절화품질은 왕겨+코이어(1:1, v/v)배지가 우수하였으나 다른 배지와 큰 차이는 없었다. 또한 절 화 후 구근 비대에서는 나리전용배지, 펄라이트+피트모 스(1:1, v/v)배지에서 우수한 결과를 보였으며, 부패율 은 왕겨+코이어(1:1, v/v)배지가 가장 높게 나타났다. 화뢰 출현기부터 절화기까지 양액농도별 처리에서 원시 1배액 처리가 절화장, 절화중, 화수 등 절화품질이 가장 좋았으며, 개화는 무처리, 원시 1/3배액 처리 순 으로 농도가 낮을수록 개화가 빨랐다. 절화 시 양액 농도별 엽분석 결과 처리농도가 높을수록 N와 K의 흡수율이 높게 나타났으며, Ca와 Mg도 농도가 높을수 록 증가추세를 보였으나 P는 모든 처리에서 흡수율이 가장 낮았다. This purpose of this study was to examine the effect of planting density, growing medium and strength of a nutrient solution (National Horticultural Research Institute's nutrient solution: HRI's) on the growth and development of Oriental hybrid lily ‘Le Reve’ in a box cultivation. The planting density with 14, 18 and 22 bulbs had sprouting one day earlier than other treatments. Planting density of 22 bulbs flowered first, while six bulbs flowered the last, indicating that higher planting densities led earlier flowering. The increasing planting density increased stem length of cut flowers. On the other hand, cut flower quality was improved when the planting density was lower. The incidence of physiological disorders such as blasting was more frequent in planting density of 22, 18, and 14, indicating that higher planting densities caused higher incidences of physiological disorders. All planting densities except 22 bulbs displayed superior results in width, weight, number, and scale weight of the bulbs. Greater planting densities led to inferior bulb enlargement and an increased decomposition rate. pH decreased in all treatments after the bulb enlargement and decreased more as the planting density increased. Contents of P, K, Ca, and Mg increased, while contents of K and Ca decreased, as the planting density increased. The rice hull+coir (1:1, v/v) treatment was better than others, but did not show that much of a difference. Moreover, in bulbs enlargement after cut flower harvest, lily medium and perlite+peat moss treatments showed superior results, and decomposition rate was the greatest in the rice hull+coir (1:1, v/v) treatment. In the HRI's solution strength treatment from the period of flower bud emergence to flower harvest, higher solution strengths gave better cut flower quality in terns of length, weight, and number of flowers. The non-treated control and one third strength of a HRI's solution hastened flowering, indicating that lower strengths led to earlier flowering. According to the results of leaf analysis as affected by solution strength during the flower harvest, absorption rates of N and K were greater when the strength was higher, and Ca and Mg showed the same tendency. On the other hand, the absorption rate of P was the lowest in all treatments.

해설 : 산업광물과 나노기술

채수천,장영남,배인국 한국광물학회 2006 광물과산업 Vol.19 No.1

적토의 활성화를 통한 적조구제물질 개발 및 특성에 대한 연구

채수천,배인국,장영남,김상배 한국광물학회 2004 한국광물학회.한국암석학회 공동학술발표회 논문집 Vol.2004 No.-

기술정보 : 기능성 고령토 가공처리 기술 및 응용

채수천,장영남,배인국 한국광물학회 2006 광물과산업 Vol.19 No.2

Putative association of RUNX1 polymorphisms with IgE levels in a Korean population

채수천,박병래,박춘식,류하정,양윤식,이수옥,최유현,김은미,우수택,김용훈,김가경,오범석,정헌택,김규찬,신형두 생화학분자생물학회 2006 Experimental and molecular medicine Vol.38 No.5

RUNX1, a member of the runt domain gene family of transcription factors, encodes a heterodimeric transcription factor and regulates the expression of hematopoiesis and myeloid differentiation. RUNX1 has been one of the target genes for research into various autoimmune disea-ses due to its properties as a transcription factor and functional distribution for chromosomal trans-location. In an effort to identify additional gene polymorphisms in which variants have been implicated in asthma, we investigated the genetic polymorphisms in RUNX1 to evaluate it as a potential candidate gene for a host genetic study of asthma and IgE production. We identified 19 sequence variants by direct DNA sequencing in 24 individuals of which four common variants were selected for genotyping in our asthma cohort (1,055 asthmatic patients, 384 normal controls). Using logistic regression analysis for association with the risk of asthma, while controlling for age, gender, and smoking status as of asthma were detected. However, two poly-morphisms in the promoter region (-2084G> C and -1282G>A) showed a marginal association with total IgE levels (0.03 and 0.03 in recessive models, respectively). Our findings suggest that poly-morphisms in RUNX1 might be one of the genetic factors for the regulation of IgE production

Molecular variations in Th1-specific cell surface gene Tim -3

채수천,송주희,Pann Pounsambath,Hai-Ying Yuan,이재훈,김정중,이용철,정헌택 생화학분자생물학회 2004 Experimental and molecular medicine Vol.36 No.3

mucin domain (TIM) proteins is identified to be expresed on T cels. A member of Tim family, Tim-3 (T cell immunoglobulin mucin 3) is selec-tively expressed on the surface of diferentiated Th1 cells. Tim-3 might have an important role in the induction of autoimune diseases by regulating macrophage activation and interacts with Tim-3 ligand to regulate Th1 responses. To determine the variation sites in the coding and promoter region of human Tim-3 gene, we per-formed variation scanning by direct sequencing tients with asthma or allergic rhinitis and heal-thy controls without asthma and allergic rhinitis. We identified four single nucleotide polymor-phisms (SNPs) including one novel SNPs (-1541C>T) and two variation sites (-1292_-1289delTA and -1282_-1278dupTA) in the coding and promoter region of human Tim-3 gene in both the patients and healthy groups.

고준위 핵폐기물의 고정화를 위한 메트릭스 개발 : Ce-파이로클로어 합성 연구

채수천,장영남,배인국,Ydintsev 대한자원환경지질학회 2002 자원환경지질 Vol.35 No.2

Gd-Ti-O계 및 Gd-Zr-O 계에서의 파이로클로어 합성연구

채수천,배인국,장영남,S.V. Yudintsev 대한자원환경지질학회 2004 자원환경지질 Vol.37 No.3

Pyrochlores were known as promising materials for the immobilization of radioactive actinide. Accordingly, we synthesized pyrochlores with Gd$_2$Ti$_2$$O_7$ and Gd$_2$Zr$_2$$O_7$compositions by sintering method, and studied its properties and phase relations in Gd-Ti-O and Gd-Zr-O system. The mixed powders were pressed into pellets under 200-400 kgf/cm$^2$ at room temperature. and then sintered at 1000-1$600^{\circ}C$ for 0.5-40 hours. The synthesized samples were analyzed and were identified with XRD and SEM/EDS analyses. The optimal synthetic conditions of pyrochlores with Gd$_2$Ti$_2$$O_7$composition were at 140$0^{\circ}C$/0.5hrs, 130$0^{\circ}C$/3hrs and 120$0^{\circ}C$/20hrs. Its chemical composition was $Gd_{2.0-2.1}$$Ti_{1.9-2.0}$$O_7$ and similar to the stoichiometric composition without any relationship in temperature and atmosphere. The optimal synthetic conditions of pyrochlores with $Gd_{2}$$Zr_{2}$$O_7$composition were at 155$0^{\circ}C$/40hrs and 1$600^{\circ}C$/30hrs. The compositions of pyrochlore synthesized from these optimal conditions were irregular with $Gd_{1.5-2.4}$$Zr_{1.7-2.4}$$O_7$. Such heterogeneity indicates that the reaction rate of pyrochlore with Gd$_2$Zr$_2$$O_7$composition is very low, and then its equilibrium state could not be attained even for 40 hours which was the longest sintering time in this research. Gd-Ti-O 및 Gd-Zr-O계에서의 파이로클로어 (Gd$_2$Ti$_2$$O_7$및 Gd$_2$Zr$_2$$O_7$)는 장주기 방사성 폐기물인 악티나이드 원소들을 고정화시킬 수 있는 물질로써 잘 알려져 있다. 따라서 본 연구에서는 소결법에 의해 이들을 합성하여, 상평형 관계 및 특성을 연구하였다. 혼합된 시료는 상온에서 200-400kgf/$cm^2$의 압력으로 성형한 후, 1000-1$600^{\circ}C$ 범위에서 소결온도 및 분위기를 변화시키면서 소결하였다. 합성된 시료는 XRD 및 SEM/EDS를 사용하여 상분석 및 화학조성을 분석하였다. 실험결과, Gd$_2$Ti$_2$$O_7$의 최적 합성조건은 140$0^{\circ}C$/0.5 hrs, 130$0^{\circ}C$/3 hrs 및 120$0^{\circ}C$/20 hrs였고, 이때의 화학조성은 $Gd_{2.0-2.1}$$Ti_{1.9-2.0}$$O_7$으로 소결온도 및 분위기와 무관하게 화학양론적 조성에 근접하였다. $Gd_{2}$$Zr_{2}$$O_7$의 최적 합성조건은 155$0^{\circ}C$/40 hrs 및 1$600^{\circ}C$/30 hrs였으나 화학조성은 $Gd_{1.5-2.4}$$Zr_{1.7-2.4}$$O_7$로 매우 불균질 하였다. 이 같은 불균질성은 본 연구의 최장 소결시간이었던 40시간에서 조차 평형을 이루지 못할 정도로 Gd$_2$Zr$_2$$O_7$의 생성속도가 매우 낮음을 지시하고 있다.

NO와 면역조절 반응

채수천,정헌택 대한천식알레르기학회 2002 천식 및 알레르기 Vol.22 No.4

필리핀 루손지역의 만카얀 광화대의 광물학적 특성

채수천,김형석,김상배,김정윤,손정수 대한지질학회 2007 대한지질학회 학술대회 Vol.2007 No.