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장홍기,박용서,김태춘,조자용,박윤점,김춘광,허북구 한국원예학회 2004 원예과학기술지 Vol.22 No.3
천연염료로서 배나무 전정과정에서 발생하는 부산물인 절지의 이용성을 조사하기 위해 배나무 절지 추출액으로 면과 견직물을 70∼80℃에서 염색한 결과 염색직물은 적황색계열로 염색되었다. 매염처리에 따른 염색직물의 표면색은 소석회와 가성소다 매염시 적색정도가 강했으며, 명반매염시는 황색정도가 강하게 나타났다. 세탁에 따른 염색직물의 표면색은 세탁횟수가 증가할수록 E값이 낮아지고 L값이 높아졌으나 a값의 변화는 적었다. 염색직물을 pH 4, 6, 8, 10에 세정한 결과 E값, L값, a값, b값에 유의성을 나타내지MordantzSunlight treatmentCotton Utilization of pruned pear branches as a potential natural dye was investigated. Cotton and silk fabrics were dyed with extracts from pear branches at 70℃ to 80℃. After dyeing, the fabrics exhibited red-yellow colors. The fabrics treated with air-slaked lime and sodium hydroxide as mordants showed red surface color, while fabrics treated with alum (AlK(SO4)2) showed yellow color. △E values decreased and L values increased with increasing of washing times. No significant difference in the values of △E, a, and b of the fabrics, when washed the dyed fabrics with solutions ranged from pH 4 to 10, were observed. The fabrics exhibited high resistance to the laundry. Resistances of fabrics to sunlight showed significant difference in △E, a and b values of the dyed fabrics (P<0.5) as influenced by sunlight treatment and mordants.
온실멜론의 암면재배에 있어서 수분기의 양분공급제한이 생육 및 양분흡수에 미치는 영향
장홍기,정순주 한국생물환경조절학회 1997 시설원예‧식물공장 Vol.6 No.1
This experiment was carried out to investigate the effects of limited nutrient supply during 21 days before and after pollination stage on the growth, fruit quality and nutrient uptake of muskmelon in rockwool culture. Muskmelon, cv. Earl's Favorite seeds sowed on rockwool cube and transplanted on rockwool slab($90\times15\times7.5cm$) when 2 to 3 true leaf appeared on Sep. 6, 1991. Three kinds of nutrient composition recommended by Shizuoka university, combinated with the composition of Otsuka house A and composition Shizuoka III. One half of calcium nitrate(Ca(NO$_3$)$_2$.4$H_2O$) for limiting nitrogen supply during 21 days was treated and then fertigated the nutrient composition recommended by Shizuoka university up to harvest time. Trickling nozzles(Netafim Co. Israel) were used for fertigation of nutrient solution and noncirculating system was employed. Temperature was maintained $18^{\circ}C$ in night but 23 to $25^{\circ}C$ for 10 days after pollination for softening the fruit. The drainage ratio of nutrient solution was adjusted 20 to 30 percent. Fertigated and drained amount, and the pH and EC of nutrient solution were recorded. The concentrations of mineral elements including N, P, K, Ca, and Mg were analyzed and compared among treatments. In both autumn and winter cultivation, the limitation of nutrient supply by adjustment of nutrient composition(NO$_3$-N : 8meㆍ$\ell^{-1}$) caused the nutrient deficiency in muskmelon plant due to the limited nutrient supply. After pollination nutrient limitation by the lowering the nitrate retarded the over thickening of upper leaves of muskmelon but plant height and fresh weight of fruit were higher in the plot of nonlimited nutrient supply. The phenomena were attributed to the differences of the amount of nutrient uptake due to the limited time of nutrient solution, duration of nutrient supply and concentration of nutrient solution. These results suggested that increasing nutrient supply in the pollination stage was favorable for better appearance of fruit and improving fruit quality. Further trials would be required for the incre-ment of sugar degree of muskmelon grown in rockwool.
장홍기,Jang, Hong-Gi 한국방위산업진흥회 1991 國防과 技術 Vol.- No.146
군사판매와 공동협력의 2가지 접근방법이 새로운 현실에 부응하여 완만하게나마 NATO내 비표준화장비의 표준화를 시도해 왔다. 미국과 독일간의 Roland/Patriot 방공미사일, 미국과 이탈리아간의 방공협정과 같은 합작품들은 1980년대 중반에 시작한 공동사업이다. 미의회에서는 동맹국 및 우방국들과의 협력활동을 지원해주었다. 1976회계연도의 Culver-Nunn법은 국무부가 NATO국가들과 광범위한 협력활동을 추진하도록 고무하였다