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여름철 파프리카 관비재배시 토양수분포텐셜이 과실품질 및수량에 미치는 영향
이한철,최경이,정재완,조명환,여경환,김다미,안철근,이동열 (사) 한국생물환경조절학회 2013 생물환경조절학회지 Vol.22 No.4
This study was conducted to identify the effect of soil water potential on the fruit quality and yield of paprika in summer fertigation cultivation. Treatments of soil water potential during cultivation were composed of −10, −20, and −30 kPa, respectively. The plant height of early growth was increased by high soil water potential (−10 kPa) treatment all of ‘Cupra’ and ‘E499524’ (mini-paprika) varieties. Mean fruit weight was increased by −20 kPa soil water potential treatment compared with the other treatments. The fruit number per plant was not affected by soil water potential in ‘Cupra’ variety but was increased by −20 kPa soil water potential treatment in E499524 variety (mini-paprika). The yield of soil water potential treatment of −20 kPa was higher than those of the other treatments. The flesh thickness and sugar content were not affected by soil water potential in ‘Cupra’ and ‘E499524’ (mini-paprika) varieties. The incidence of fruit cracking was decreased with decreasing soil water potential. Mineral contents of plants such as nitrogen, potassium, calcium, magnesium etc. were not affected in soil water potential. 파프리카의 토양재배면적 증가에 따라 관비재배법의확립이 요구되고 있다. 관비재배(Fertigation)는 물과 양분을 함께 공급하는 방법으로 작물의 수분과 양분의 과부족에 의한 장해없이 근권을 안정적으로 유지할 수 있다. 본 연구에서는 시설 파프리카의 관비재배시 토양수분포텐셜에 따른 과실 품질 및 수량의 효과를 구명코자실험을 수행하였다. ‘쿠프라’ 및 ‘E499524’ 2품종을 공시하여 정식 후부터수확기까지 토양수분포텐셜을 −10, −20 그리고 −30kPa 로 처리구를 두었다. 초장은 토양수분포텐셜이 높은−10kPa 처리구가 가장 길었다. 과실의 평균 과중은 ‘쿠프라’ 품종에서는 평균과중은−20kPa에서 154.5kg으로 가장 무거웠으며 토양수분포텐셜이 낮은 −30kPa에서는 138.2kg으로 가벼웠다. 주당착과수는 5.1~5.3개로 ‘쿠프라’ 품종은 토양수분포텐셜에따른 차이가 없었으나 ‘E499524’ 품종은 −20kPa 처리구에서 10.3개로 가장 많았다. 상품수량은 ‘쿠프라’ 품종은−20kPa 처리구에서 2,321kg/10a로 가장 많았고 그리고‘E499524’ 품종은 −20kPa 처리구에서 1,147kg/10a로 가장 많았다. ‘쿠프라’ 품종에서는 과장과 과폭은 토양수분포텐셜에따른 차이가 없었으나 ‘E499524’ 품종은 토양수분포텐셜이 낮을수록 작은 경향을 보였다. 과실의 당도는 ‘쿠프라’ 품종에서는 4.4~4.9oBrix, 그리고 ‘E499524’ 품종에서는 7.6~8.3oBrix로 토양수분포텐셜에 따른 통계적유의차가 없었다. 자방수는 ‘쿠프라’ 품종에서는 3.3~3.6개, 그리고‘E499524’ 품종에서는 2.5~2.7개로 토양수분포텐셜 간에유의차이가 없었다. 과실의 열과 발생율은 ‘쿠프라’ 및‘E499524’ 품종 모두 토양수분포텐셜 낮을수록 적은 경향을 보였다. 식물체 내 질소의 함량은 토양수분포텐셜에 따른 차이가 없었으며 ‘쿠프라’ 품종은 2.10~2.22%였고 ‘E499524’품종은 1.72~1.82%였다. ‘쿠프라’ 및 ‘E499524’ 품종 모두 토양수분포텐셜에 따른 식물체의 칼륨, 칼슘, 마그네슘 등 무기 양분의 함량은 유의차이가 없었다. 이상의 결과에서 파프리카의 여름철 관비재배시 토양수분포텐셜을 −20kPa로 설정하는 것이 생육이 가장 좋은 것으로 판단되었다.
HACCP 의무적용 식품 및 소규모 HACCP 제도 개선방안
이한철,박민지,오도경,김찬영,정은선,김채영,임지유,김중범,Lee, Han-Cheol,Park, Min-Ji,Oh, Do-Gyung,Kim, Chan-Yenog,Jeong, Eun-Sun,Kim, Chea-Young,Im, Ji-Yu,Kim, Jung-Beom 한국식품과학회 2022 식품과학과 산업 Vol.55 No.3
As a result of analyzing the domestic and foreign HACCP systems, advanced countries mandated HACCP system on all foods to strengthen food safety management and USA, EU and China do not apply small-scale HACCP system. Looking at the cases of food safety accidents in Korea and the non-compliance rate of HACCP certification evaluation by size, the accident rate of companies without HACCP certification was 31.2% higher than that of companies with HACCP certification. The nonconformity rate of food inspection standards was analyzed to be 89.0% higher than that of HACCP certification companies. Based on the international trend of food safety management and the frequency of food safety accidents, it is proposed to gradually expand the mandatory application of HACCP system in Korea to all foods, and to change the small-scale HACCP standard from less than 500 million Korean won or 21 employees to less than 500 million Korean won.
甘草 , 丁香 , 知母 , 및 黃栢이 白鼠의 血淸 Serotonin , Melatonin 濃度 및 行動樣態에 미치는 影響
李漢哲,李東奎,金瞳一,李泰均 대한한의학회 부인과학회 2000 大韓韓方婦人科學會誌 Vol.13 No.2
Depression is not known certainly in mechanism and found in women by relatively higher prevalence than men. Western medicine use the tricyclic drugs, MAO inhibitors, or serotonin agonists but not to all of them in current management. But some side effects also were reported. As oriental and korean traditional medicine have taken charge of women's psychosomatic aspects, herbal medicines were reported for depression related symptoms. This study has focus on 1) neuro transmitter as serotonin, melatonin concentration test, 2) behavioral model test of some herbal medicines, which are Glycyrrhiza uralensis FISCH., Eugenia caryo-phyllata Thunb., Anemarrhena sphodeloides BGE., and Phellodendron chinense SCHNEID. Compared with control group, Serotonin concentration increased in all herbal groups, especially Glycyrrhiza uralensis FISCH. and Melatonin concentration decreased in all herbal groups. In Behavioral model test, improving depression state of herbal groups was proved, too. As results, Glycyrrhiza uralensis FISCH., Phellodendron chinense SCHNEID. have improving effects on depression. But for using to care for patients, more study like comparative with western medicines and herbal dosage study are needed.
EDTA.2Na를 이용한 구리 부식생성물의 화학세정 및 NALCO-39L에 의한 표면처리효과
이한철,이창우,현성호 한국안전학회 1999 한국안전학회지 Vol.14 No.1
This study was carried out to investigate the effect of chemical cleaning of corrosion product on cooling system made of copper as a basic material and using cooling water as pure water. We studied chemical cleaning condition that minimizes the influence on basic material by means of EDTA solution so as to eliminate the slurry in cooling system. In addition, the proper amount of NALCO-39L (Nitrite-Borate-BZT mixture) as a inhibitor was determined in order to protect the copper in cooling system against corrosion after chemical cleaning and the effect of corrosion resistance on the copper surface treated was excelent in comparison with surface untreated. As a result, we found that the main components of sludge in cooling system produced by corrosion of copper were $Cu_2O$, CuO, Cu, and Fe. The optimum condition of chemical cleaning was 400ppm EDTA solution at $60^{\circ}C$. Inhibitor concentration needed to treat the surface of pure copper was 15~20ppm per unit area and corrosion rate of copper treated with 500ppm inhibitor solution for 72 hrs at $60^{\circ}C$ was remarkably decreased as compared with that of pure copper.