• 제목/요약/키워드: Plant density

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Chlorella vulgaris의 당류 능동수송계에 미치는 칼슘 이온의 영향 (Calcium Ion Effect on the Sugar-H+ -Cotransport System in Chlorella vulgaris)

  • 조봉희
    • Journal of Plant Biology
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    • 제36권4호
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    • pp.321-326
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    • 1993
  • Sugar uptake is accompanied with H+-substrate-symport generally. Both H+/sugar-and H+/K+ stoichiometries during the sugar-uptake have been reported to be exactly 1 : 1. This paper reports that the stoichiometries were enhanced dramatically by the addition of CaCl2 into the medium and by the high cell density of 200 $\mu$L pc/mL. The concentration of free Ca2+ ions in the cells increased significantly with cell density. It is suggested that the free Ca2+ ions are responsible for the change of stoichiometry of sugar transport system by regulation of H+ ion level of biomembrane.

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백모오가피로부터 분리된 트리터페노이드 및 리그난의 항산화작용 (Antioxidative Activities of Triterpenoids and Lignans from Acanthopanax divaricatus var. albeofructus)

  • 김지연;양기숙
    • 약학회지
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    • 제48권4호
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    • pp.236-240
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    • 2004
  • Acanthopanax species (Araliaceae) traditionally has been used as analgesics, stimulant of immune system, and replenishment of body functions. Acanthopanax divaricatus var. albeofructus is indigenous plant to Korea. The antioxidant activities of compounds from A divaricatus var. albeofructus were determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH) method and thiobarbituric acid reactive substance (TBARS) assay on human plasma low-density lipoprotein (LDL). The triterpenoid and lignan constituents from this plant showed antioxidant activities and the lignan, l-sesamin exhibited the most potent antioxidant activity in Cu$^{2+}$ -induced LDL oxidation.n.

콩 꼬투리에서 서식하는 세균 및 콩나물 부패균의 밀도 변화 (Population Density Changes of Bacteria Causing Soybean Sprout Rot on Soybean Pods)

  • 이은정;한광섭;심명용;최재을
    • 식물병과 농업
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    • 제5권1호
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    • pp.41-45
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    • 1999
  • Bacterial population densities on soybean pods from Chungnam province ranges 105~106 CFU/$\textrm{cm}^2$, whereas those of bacteria causing sprout rot ranged 0~103 CFU/$\textrm{cm}^2$. Erwinia chrysanthemi, Xanthomonas campestris pv. glycines, Staphylococcus sp., and Micrococcus sp. were identified as pathogenic bacteria causing soybean sprout rot. The population density of X. campestris pv. glycines was higher than those of other bacteria.

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식이 단백질의 종류와 함황아미노산 함량이 성장기 쥐의 골밀도에 미치는 영향 (The Effect of Dietary Protein Source and Sulfur Amino acid Content on bone Metabolism in Growing Rats)

  • 최미자;정소형
    • Journal of Nutrition and Health
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    • 제37권2호
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    • pp.100-107
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    • 2004
  • This study was performed to evaluate the effect of dietary protein source and sulfur amino acid content on bone metabolism in ra. Thirty male rats (body weight 145$\pm$2g) were divided into three groups. The rats in the first group were fed on casein 20% diet as animal protein source and those in the second group were fed on soy 20% diet as plant protein source. Sulfur amino acid ratio of these group was 1.07:1. The rats in the third group were fed on soy 20% diet and the sulfur amino acid were supplemented with the amount contained as much in the soy 20% diet. All rats were fed on experimental diet and deionized water ad libitum for 9 weeks, The total body, spine, femur bone mineral density and bone mineral content were measured using Dual Energy X-ray Absorptiometry Calcium, phosphate, pyridinoline, creatinine in urine and calcium, phosphate, alkaline phosphatase, osteocalcin in serum were measured. During the experimental period, plant protein (soy protein) group had a lower urinary Ca excretion, urine pyridinoline & crosslinks value and had a higher Ca efficiency in total bone and femur bone mineral density than animal protein (casein) group. There were no significant differences in serum calcium, phosphate, alkaline phosphatase and osteocalcin among the three groups of the rats. The findings from this study demonstrated that plant protein (soy protein) is beneficial of bone mineral density because it had a higher Ca efficiency in total bone and femur bone mineral density than animal protein (casein). However, the supplementation of sulfur amino acid on soy results were consistent with prior studies that dietary sulfur amino acid load had a negative effect on calcium balance. The rats fed sulfur amino acid supplementation diet increased urinary calcium excretion and decreased calcium efficiency for total and femur mineral density. Therefore, dietary protein source and sulfur amino acid content influence bone metabolism. (Korean J Nutrition 37(2): 100-107, 2004)

日川穹의 定植期와 裁植距籬가 生育 및 收量에 미치는 影響 (Effect of Planting Data and Density on Growth and Yield of Cnidium officinale Makino)

  • 정상환
    • 한국자원식물학회지
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    • 제10권2호
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    • pp.159-164
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    • 1997
  • 일천궁의 정식기와 재식거리가 생육 및 수량에 미치는 영향을 구명하고자 울릉 일천궁을 공식하여 정식기를 3월 5일부터 4월 20일까지 15일 간격으로 4회 정식하고 재식거리를 휴폭은 35, 45, 55cm로 하고 주간거리를 15, 25, 35cm로 하여 경상북도 울릉도에서 1991년부터 1992년까지 2개년간 시험한 결과를 요약하면 다음과 같다. 1. 정식기가 늦어질수록 지상부 생육이 떨어졌고 병해(엽고병, 위황병)는 7정도, 충해(천궁 바구미)는 5정도로 정식기간에 모두 다소 높게 발생하였다. 2. 엑스함량은 조식할수록 많았으며 회분과 산불용성 회분함량에서는 대한약전외 한약(생약) 규격치 이하여서 생약으로 이용시 안전성과 유효성과 문제가 없는 것으로 나타났다. 3. 건근수량은 3월 30일 정식(2,880kg/ha)이 가장 많았고 이후의 만식에서는 $58\sim70%$감수되어 일천궁의 정식기는 3월20일경이었다. 4. 재식거리에 따른 생육은 소식일수록 좋았고 수량평가의 요소인 주당 노두수는 밀식일수록 증가하였다. 5. 엑스함량은 재식거리간 모두 $4.3\sim4.6%$였고 회분과 산불용성 회분함량은 생약 이용 규격 이하여서 양징근이었다. 6. 건근수량은 $45\times25cm$(2,000kg/ha)에 비해 $35\times15cm$에서 33% 증수되어 적정 재색거리로 판단되었다.

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해안간척지의 생태적 환경복원을 위한 식물 선정에 관한 연구 -인천공항 사토장지역을 중심으로- (Plant Species Selection Program for Ecological Restoration of Coastal Reclaimed Land -Focused on the Dumped Soil Area at Inchon Airport-)

  • 배영훈;이동근
    • 한국환경복원기술학회지
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    • 제4권3호
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    • pp.66-74
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    • 2001
  • The main purpose of this thesis is to select the appropriate plants for the ecological restoration of coastal land. The soil and vegetation environment survey of the beach where the halophytes live now was executed for the sake. Firstly, the soil survey was done by the physical and chemical survey of beach soil and dumped soil. The soil is mostly sandy loam and sandy clay loam which has silty much. The beach soil where the salt plants live has more organic matters in the content than dumped soil because of the influx of the dead halophytes, a pioneer plant to this area. Secondly the vegetation survey was executed by the halophytes survey in the beach area in order to select the appropriate plants for ecological restoration. The shows two different areas in the vegetation divided by the salt density of soil. Artemisia fukudo, Juncus haenkei, Carex pumila, Silene armeia, Polyponum aviculare etc live in the less salt density area and it doesnt show collected. Salicornia herbacea, Suaeda asparagoides, Aster tripolium, Limonium tetragonum, Suaeda maritima, Scirus fluvitilis, Phragmtes communis, Suaeda japonica, Zoysia sinica etc halophytes live in the more salt density area and there are a few advent plant but many collected. So the salt density of soil limits the vegetation. The selection of appropriate plants for the ecological restoration programs was designed with 3 different standards considering the salt density of soil in the dumped soil area. The plan selection guidelines of thick salt density due to the salt density of soil, and economical efficiency and maintenance because the area is large. The guidelines of middle salt density area were made considering economical efficiency and maintenance because there are salt as well, and it is effective for the scenery if they have normal ecology but their leaves have good color and the flowers are beautiful. However I suggest beautiful flowery plants for the neutral plan area because this area is the entry point of the airport so the view is very important.

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Ginsenoside compound K protects human umbilical vein endothelial cells against oxidized low-density lipoprotein-induced injury via inhibition of nuclear factor-κB, p38, and JNK MAPK pathways

  • Lu, Shan;Luo, Yun;Zhou, Ping;Yang, Ke;Sun, Guibo;Sun, Xiaobo
    • Journal of Ginseng Research
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    • 제43권1호
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    • pp.95-104
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    • 2019
  • Background: Oxidized low-density lipoprotein (ox-LDL) causes vascular endothelial cell inflammatory response and apoptosis and plays an important role in the development and progression of atherosclerosis. Ginsenoside compound K (CK), a metabolite produced by the hydrolysis of ginsenoside Rb1, possesses strong anti-inflammatory effects. However, whether or not CK protects ox-LDL-damaged endothelial cells and the potential mechanisms have not been elucidated. Methods: In our study, cell viability was tested using a 3-(4, 5-dimethylthiazol-2yl-)-2,5-diphenyl tetrazolium bromide (MTT) assay. Expression levels of interleukin-6, monocyte chemoattractant protein-1, tumor necrosis factor-${\alpha}$, intercellular adhesion molecule-1, and vascular cell adhesion molecule-1 were determined by enzyme-linked immunosorbent assay and Western blotting. Mitochondrial membrane potential (${\Delta}{\Psi}m$) was detected using JC-1. The cell apoptotic percentage was measured by the Annexin V/ propidium iodide (PI) assay, lactate dehydrogenase, and caspase-3 expression. Apoptosis-related proteins, nuclear factor $(NF)-{\kappa}B$, and mitogen-activated protein kinases (MAPK) signaling pathways protein expression were quantified by Western blotting. Results: Our results demonstrated that CK could ameliorate ox-LDL-induced human umbilical vein endothelial cells (HUVECs) inflammation and apoptosis, $NF-{\kappa}B$ nuclear translocation, and the phosphorylation of p38 and c-Jun N-terminal kinase (JNK). Moreover, anisomycin, an activator of p38 and JNK, significantly abolished the anti-apoptotic effects of CK. Conclusion: These results demonstrate that CK prevents ox-LDL-induced HUVECs inflammation and apoptosis through inhibiting the $NF-{\kappa}B$, p38, and JNK MAPK signaling pathways. Thus, CK is a candidate drug for atherosclerosis treatment.