• 생물환경조절학회지
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• 제20권1호
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• pp.27-32
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• 2011

마늘 신품종 '올캐'의 특성을 구명하고, 화경제거 유무 및 제거방법이 '올캐'마늘과 '남도'마늘의 생육 및 수량에 미치는 영향을 검토하였다. '올캐'마늘은 추대기 및 수확기가 '남도'마늘보다 20일 정도 빨랐다. 지상부 생장은 '남도'마늘보다 떨어졌으나 뿌리 발달은 좋았다. 각 품종의 수확적기에 수확할 경우 구 중량은 '남도'마늘이 '올캐'마늘 보다 20% 정도 많았다. 40g 이상의 대구 비율도 '남도'마늘이 48%로 '올캐'마늘 25%에 비해 두배 정도 많았다. 인편수는 '올캐'마늘이 '남도'마늘 보다 1.9개 정도 많았다. 열구 발생률은 '올캐'마늘이, 저장중 부패율은 '남도'마늘이 높았다. 화경을 제거할 경우 무처리에 비해 잎마름 속도가 빠르고 그 정도도 심했으나 화경제거 방법간에는 차이가 없었다. 엽면적은 잎마름률과 같은 경향이었다. 수확 50일 후의 구중은 화경 제거구가 무제거구에 비해 '올캐'마늘은 11%, '남도'마늘은 13%정도 많았다. 40g 이상의 대구 분포비율은 화경제거구가 무처리구에 비해 '올캐'마늘은 약 27%, '남도'마늘은 약 44% 정도 많았다. 따라서 두 품종 모두 화경을 제거해 주는 것이 대구 생산에 유리하며 특히 '남도'마늘은 화경제거 효과가 컷다. 화경제거 방법간에는 통계적인 유의차가 없었다. 열구 발생률과 저장중 부패율은 화경제거 유무 및 제거방법에 따른 차이가 없었다.

• 한국연초학회지
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• 제11권1호
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• pp.19-25
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• 1989

Effect of removal time of mulched polyethylene film on the chlorine content of toP soil and on the chlorine absorption by burley tobacco Plants was investigated under the field condition in 1986 and 1987. Treatment consisted of 4 removal times (from 30 to 75 days after transplanting with IS days interval) and control (no removal). The chlorine content of top Boll at 15 days after removal of mulched polyethylene film(MPF) lowered temporarily, and the decrement of chlorine content of top soil was closely related to the sum of rainfalls after removal of MPF. The chlorine was accumulated much in upper leaves when the MPF being removed early, while the chlorine was accumulated much in lower loaves when the MPF being removed late, relatively. However, the removal of MPF had no effect on the chlorine content of whole leaf. The yield decreased with removal of MPF during growing period.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.322-324
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• 2003

Leaf C:N ratio is a new factor in the field of biochemical inversion with hyperspectral data. Effects of common-used spectral transformations including log(R), log(1/R), 1/R, etc. from 400nm to 2490nm on its inversion are compared. Results show that their effects on statistical modeling are not apparent. Continuum removal is used on original reflectance in the range of 2030nm to 2220nm, in which exists an apparent absorption peak due to cellulose, lignin, protein, etc. The effect is distinctive and tends to improve the precision of C:N ratio inversion. Further, it is a robust and physically based transformation.

• Journal of Plant Biology
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• 제17권3호
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• pp.127-136
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• 1974

The effect of potassium metabolism on the soybean leaves was studied with comparison of other elements during the successive growing period. The results were as follows; 1. The percentage of potassium content showed remarkable increase not only in the first compound leaf at a stage which was growing vigorously and producing new leaves, but also in the fifth compound leaf at a stage which was taking a active metabolism of nitrogen and carbohydrate but not producing new leaves. However, the percentage of potassium content was decreased in the second compound leaf than in the first one. Such a result could be regarded as a potassium removal from mature leaves into immature and flowing out from stoma through respiration. During the pod-development the percentage of potassium content in the soybean leaf was decreased. 2. If nitrogen, phosphorus and potassium were added excessively in the nutrient solution, the percentage of potassium content in the soybean leaf had increased. The effects of these elements showed a remakable increase in the excessive plot of nitrogen than in that of phosphorus. At early stage the redtarded effect of phosphorus on the growth of soybean could be covered by potassium, however, at late stage it could not. The growth of soybean plant was much more inhibited by potassium, compared with nitrogen and phosphorus. New leaves could not be produced in the potassium deficient soybean plant after the third compound leaf. The normal growth of soybean plant could not be observed if only one element was excessively added to the culture solution, compared with the deficiency of other two elements.

• 한국조경학회지
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• 제35권2호통권121호
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• pp.49-54
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• 2007

This research was performed to investigate the effect of formaldehyde removal and confirm the utility of plants as indoor environment improvement systems. The plant materials used in this study were Fatsia japonica, Ardisia japonica, Ardisia pusilla and Davallia mariesii. Plants were placed in an airtight chamber under artificial formaldehyde. The initial formaldehyde concentration in the chamber was $500{\pm}30ppb$, and the conditions of $1,500{\sim}2,000lux$ light, $25{\pm}5^{\circ}C$ temperature and $80{\sim}90%$ humidity were maintained. Each chamber was treated as no plant, plant-only and Plant+soil. The total leaf number for Davallia mariesii, Ardisia japonica, Ardisia pusilla, and Fatsia japonica was 40.8, 48.6, 62.3, and 11.8 respectively. The total leaf space n of those plant materials were $2,385cm^2,\;1,252cm^2,\;2,468cm^2\;and\;1,262cm^2$ respectively. The formaldehyde concentration was reduced to $80{\sim}90%$ of the initial concentration in plant-only and Plant+Soil treatment chamber of all species in 12 hours. In the plant-only chamber, Fatsia japonica had removed formaldehyde density by 95% after 12 hours while Ardisia japonica had removed 90%. In the case of Ardisia pusilla, the early removal rate was higher in the plant-only treatment chamber than the Plant+Soil treatment chamber. The formaldehyde removal rate of Davallia mariesii was 98% after 12 hours. In the Plant+Soil treatment chamber, the amount of removal of formaldehyde per time of Davallia mariesii, Ardisia japonica, Ardisia pusilla, and Fatsia japonica was 20.42ppb/hr, 16.28ppb/hr, 2.5.42ppb/hr, 10.28ppb/hr respectively. In the plant-only, That was 22.50ppb/hr, 20.97ppb/hr, 20.83ppb/hr, 20.97ppb/hr respectively.

• Journal of Photoscience
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• 제9권2호
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• pp.442-444
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• 2002

Seedlings of spinach (Spinacia oleracea L. "King of Denmark" and "Minsterland") were grown with or without supplemental UV-B under field conditions for five or nine days when their fifth or sixth leaves were expanding. Except two leaves which were just expanded and expanding, all other leaves of each seedling were removed before tested. One of these two leaves was exposed to UV-B irradiation and the other leaf was covered with lumiror film (no transmission below 320 nm) to prevent it from UV-B exposure. l,l-diphenyl-2-picrylhydrazyl scavenging activities (antioxidative activity) in leaves without covers were increased according to UV-B doses they were exposed to. And removal of UV-B exposure with lumiror decreased foliage antioxidative activities. This increase or decrease of activities in leaves did not dependent on the UV-B doses their paired leaves were exposed to in both two cultivars. The results demonstrated that spinach foliage antioxidants induced by UV-B exposure were not transported into another leaf.

• Carbon letters
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• 제21권
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• pp.74-80
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• 2017

A highly facile and eco-friendly green synthesis of Annona squamosa (custard apple) leaf extract reduced graphene oxide (CRG) nanosheets was achieved by the reduction of graphene oxide (GO). The as-prepared CRG was characterized with X-ray diffraction (XRD), transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FT-IR), ultraviolet-visible (UV-Vis), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopic techniques. Removal of oxygen containing moieties from the GO was confirmed by UV-Vis, FT-IR and XPS spectroscopic data. The XRD and Raman data further confirmed the formation of the CRG. TEM images showed the sheet structure of the synthesized CRG. These results show that the phytochemicals present in custard apple leaf extract act as excellent reducing agents. The CRG showed good dispersion in water.

• 인간식물환경학회지
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• 제23권6호
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• pp.647-654
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• 2020

Background and objective: Particulate matter (PM) is one of the serious environmental problems and threatens human health. Plants can clean the air by removing PM from the atmosphere. This study was carried out to investigate the PM removal efficiency of 12 species of woody plants. Methods: Actinidia arguta, Dendropanax morbiferus, Fraxinus rhynchophylla, Parthenocissus tricuspidata, Pittosporum tobira, Rhaphiolepis indica, Rhapis, Salix integra, Salix koreensis, Schisandra chinensis, Viburnum odoratissimum var. awabuki, and Vitis coignetiae were used as plant material. Six 15 cm (D) pots were placed in an acrylic chamber of 800 (D) × 800 (W) × 1000 (H) mm. The LED panel was used as a light source. The reduction of PM10, PM2.5, and PM1 for 300 minutes after the injection of PM was automatically measured. Results: The leaf area and the amount of PM in the chamber showed a negative correlation. 12 species of plants were compared by dividing the plants into 3 groups according to their characteristics: vines, trees, and shrubs and small trees. In the vine plant group, the averages of PM10, PM2.5, and PM1 were 7.917%, 8.796%, and 30.275%, respectively. In the shrubs and small trees group, the average of PM10, PM2.5, and PM1 were 10.142%, 11.133%, and 36.448%, respectively. In the trees group, the average of PM10, PM2.5, and PM1 were 11.475%, 12.892%, and 40.421%, respectively. When the initial concentration was 100%, PM10, PM2.5, and PM1 of Viburnum odoratissimum var. awabuki with the largest leaf area were 5.6%, 6.3%, and 21.0% after 5 hours, respectively, the best results among 12 species of plants. Conclusion: The vine plant group was more effective in removing PM than the other two groups. In the tree groups, the fact that the leaf development was relatively inactive at a plant height of 30 cm was considered to have an effect on the removal of particulate matter.

• 한국응용곤충학회지
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• 제26권4호
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• pp.245-249
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• 1987

사과품종별(品種別) 사과나무 반점낙엽병(斑點落葉病)의 발병(發病)과 잎의 모용(毛茸) 발생정도(發生程度)를 조사(調査)하고 사과나무 잎의 부위별(部位別) A. mali의 침입정도(浸入程度)와 모용(毛茸)이 병원균(病原菌)의 침입(浸入)과 감염(感染)에 미치는 영향(影響)을 조사(調査)한 결과(結果)는 다음과 같다. A. mali의 이병정도(罹病程度)에 따른 사과나무 품종(品種)의 분포(分布)는 이병엽율(罹病葉率)이 50.1% 이상(以上)되는 이병성품종(罹病性品種)을 조사(調査)한 82품종(品種) 중(中) 15개품종(個品種)(18.3%) 이었으며 주요(主要) 품종(品種)은 나리탄, 인도(印度), 왕령(王令), 스라크림숀, 스카이스파, 아오리 3호 등(等)이었고 이병엽율(罹病葉率)이 50% 이하(以下)되는 저항성품종(抵抗性品種)이 51개품종(個品種)(62.2%)이었는데 주요품종(主要品種)은 홍옥(紅玉), 무쓰, 모리쓰, 조나골드, 쓰가루, 가라, 골덴, 후지, 스파어리브레이즈 등(等)이었으며, 주요품종(主要品種)들의 엽당병반수(葉當病斑數)도 저항성품종(抵抗性品種)보다 이병성품종(罹病性品種)에서 많았다. 이병성품종군중(罹病性品種群中)에서 이병엽율(罹病葉率)이 6월(月)에 20%, 이상(以上)되어 8월(月)에 70% 이상(以上)되는 품종(品種)이 와인삽, 아오리 3호, 스카이스파, 왕령(王令) 등(等)과 6월(月)에는 5% 이상(以上) 되었다가 8월(月)에 70% 이상(以上)되는 품종(品種)이 라리단, 스타크림숀, 인도(印度) 등(等)으로 구분(區分)되었다. 품종별(品種別) 잎에 모용발생정도(毛茸發生程度)는 이병성(罹病性) 품종군(品種群)에서 보다 저항성품종군(抵抗性品種群)에서 대체(大體)로 많았고 동일(同一) 품종(品種)잎에서 모용무제거부위(毛茸無除去部位)보다 모용제거부위(毛茸除去部位)에서 감염율(感染率)이 높은 것으로 보아 잎의 모용(毛茸)은 품종(品種) 저항성(抵抗性) 요인(要因)으로 추정(推定)되었으며 A. mali의 침입(浸入)과 감염(感染)은 잎의 표면(表面)보다 이면(裏面)에서 용이(容易)하였다.

• Food Science and Biotechnology
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• 제18권5호
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• pp.1076-1082
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• 2009

Six pesticides were determined in hot pepper leaves after successive processing steps of washing, blanching, and drying. The tested pesticides included dichlofluanid, flusilazole, folpet, iprodione, ${\lambda}$-cyhalothrin, and lufenuron. Each pesticide was singly applied to the leaves of the pepper plants, which were being cultivated in a greenhouse. The processing factors were dependent on the type of pesticide, and were in the following ranges: 0.09-0.73 by washing, <0.00-0.48 after blanching, and <0.00-3.30 after drying. Only lufenuron showed a processing factor of more than 1, at 3.30 in dried leaves, while the processing factors of the other pesticides were less than 1. The removal ratios of the tested pesticides by washing ranged from 27 to 90%. The blanching step increased their removals by 10-25%. However, drying did not have an effect on residue reduction. Finally, after proceeding to the drying step, removal ratios ranged from 85 to 100%, with the exception of lufenuron at 47%.