• Title, Summary, Keyword: salicylic acid

Search Result 325, Processing Time 0.045 seconds

Resistance to Pine Gall-midge and Phenolic Acid Content in Pine Needles (소나무류의 솔잎혹파리에 대한 저항성과 침엽내(內) Phenolic Acid의 농도)

  • Eom, Tae-Jin;Son, Doo-Sik;Lee, Sang-Woo;Seo, Jae-Durk
    • Journal of the Korean Wood Science and Technology
    • /
    • v.26 no.3
    • /
    • pp.33-40
    • /
    • 1998
  • The phenolic acids in needles of five pine species such as Pinus densiflora, P. thunbergii. P. virginiana. P. rigida. and P. koraiensis were analyzed seasionally (March, June, September and December) in order to investigate the resistant factors against pine gall-midge(Thecodiplosis japonensis Uchida et Inouye). The interrelation of resistance to pine gall-midge and the content of phenolic acids in pine needles was investigated in the artificial hybride pine species. The contents of salicylic acid in susceptible species (P. densiflora and P. thunbergii) to pine gall-midge which watered with salicylic acid solution in a pot was determined. The results can be concluded as follows, 1. There was a little change in total phenolic constituents of resistant and susceptible pines seasonally. The each content of benzoic acid, salicylic acid and p-hydroxybenzoic acid in June was the highest through four seasons. 2. In June, resistant species showed higher content of salicylic acid than susceptible species, while the content of gallic acid was the highest in December. 3. Among the 21 artificial hybrids(P. densiflora ${\times}$ P. virginiana. P. thunbergii ${\times}$ P. virginiana), the hybrides of the higher salicylic acid content showed the lower rate of pine gall formation. 4. Pine gall formation of the susceptible species which were watered with salicylic acid solution remarkably decreased.

  • PDF

Efficient Photocatalytic Degradation of Salicylic Acid by Bactericidal ZnO

  • Karunakaran, Chockalingam;Naufal, Binu;Gomathisankar, Paramasivan
    • Journal of the Korean Chemical Society
    • /
    • v.56 no.1
    • /
    • pp.108-114
    • /
    • 2012
  • Salicylic acid degrades at different rates under UV-A light on $TiO_2$, ZnO, CuO, $Fe_2O_3$, $Fe_3O_4$ and $ZrO_2$ nanocrystals and all the oxides exhibit sustainable photocatalysis. While ZnO-photocatalysis displays Langmuir-Hinshelwood kinetics the others follow first order on [salicylic acid]. The degradation on all the oxides enhance with illumination intensity. Dissolved oxygen is essential for the photodegradation. ZnO is the most efficient photocatalyst to degrade salicylic acid. Besides serving as the effective photocatalyst to degrade salicylic acid it also acts as a bactericide and inactivates E.coli even in absence of direct light.

Alterations of Glutathione Peroxidase Patterns by Stressor Treatment in Rice Seedling Roots (스트레스 물질에 의한 벼 glutathione peroxidase 활성패턴 변화)

  • Kim, Yoon-Kyoung;Lee, Mi-Young
    • Applied Biological Chemistry
    • /
    • v.48 no.1
    • /
    • pp.53-59
    • /
    • 2005
  • The effect of various stressors such as reductant ascorbic acid, signalling molecules (salicylic acid and methyl jasmonic acid), heavy metals $(NiCl_2,\;and\;MnSO_4)$ and NaCl on the glutathione peroxidase (GPX) activities and isoenzyme expression patterns were investigated in rice seedling roots. Total GPX activity increased according to the increase of ascorbic acid concentration. Prominent enhancement of GPX1 isozyme due to ascorbic acid contributed to the increase of total GPX activity. GPX showed different reactivity toward salicylic acid and methyl jasmonic acid. GPX activity increased at 0.1 mM salicylic acid, and then decreased thereafter. However, GPX increased gradually in a methyl jasmonic acid concentration-dependent manner, and 3 fold increase of GPX activity was found at 1 mM methyl jasmonic acid. Moreover, GPX1 isozyme increased according to the increase of salicylic acid, while GPX1 isozyme decreased according to the increase of methyl jasmonic acid. When metal ions were treated, GPX activity increased considerably according to the increase of $NiCl_2$ concentration, however, GPX activity increased about 2 fold at 0.5 mM $CuSO_4$ and then decreased. Enhancement of GPX1 isozyme contributed to the increase of total GPX activities in $NiCl_2-treated$ and $MnSO_4-treated$ rice seedlings. Total GPX activity increased 1.7 fold in response to 300 mM NaCl. Especially GPX2 isozyme showed gradual increase according to the increase of NaCl concentration.

Removal of Chloramphenicol, Salicylic Acid and Ketoprofen using Various Oxidation Processes : Oxidation Kinetic Evaluation (다양한 산화공정을 이용한 수중의 Chloramphenicol, Salicylic Acid 및 Ketoprofen 의약물질 제거 : 산화 동력학 평가)

  • Son, Hee-Jong
    • Journal of Korean Society of Environmental Engineers
    • /
    • v.32 no.2
    • /
    • pp.219-226
    • /
    • 2010
  • In order to evaluate a removal characteristic of chloramphenicol, salicylic acid and ketoprofen according to dose of oxidants, $Cl_2$, $O_3$ and $O_3/H_2O_2$ are used as oxidants in this study. In case of that $Cl_2$ is used for oxidizing harmaceuticals, chloramphenicol, salicylic acid and ketoprofen is not removed entirely at $Cl_2$ dose rang of 0.5~5.0 mg/L for 60 min. However, removal tendency of salicylic acid is so obviously at $Cl_2$ dose higher than 1.0 mg/L. In addition, as $Cl_2$ dose and contact time increase, the removal rate of salicylic acid is enhanced. When $O_3$ is used as oxidant, chloramphenicol and ketoprofen is not eliminated at $O_3$ dose range of 0.2~2.0 mg/L. On the contrary, 30~70% of salicylic acid is removed at $O_3$ dose of 1.0~5.0 mg/L. Only 30% removal of salicylic acid is achieved at contact time of 5 min, however, the removal rate is enhanced remarkably at contact time over 10 min. In experiments using $O_3/H_2O_2$ as an oxidant, we can find that $O_3/H_2O_2$ is much more effective than $O_3$ only for removal of 3 pharmaceuticals, and the efficiency is raised according to increase of $H_2O_2$ dose. On reaction rate constant and half-life of 3 pharmaceuticals depending on $Cl_2$, $O_3$ and $O_3/H_2O_2$ dose, experiments using $O_3/H_2O_2$ show that oxidation of pharmaceuticals is less effective as the $H_2O_2/O_3$ ratio increases to above pproximately 1.0 related to reaction rate constant. An oxidation of salicylic acid by $Cl_2$ and $O_3$ particularly has a comparatively high reaction rate constant comparing $O_3/H_2O_2$, and thus salicylic acid is easily eliminated in oxidation processes.

Continuous-Flow Analysis for Determination of Nitrate Using Hydrazine-Copper Method in Plan (Hydrazine-Copper 방법을 이용한 연속흐름제어장치를 통한 식물체의 nitrate 분석)

  • Park, Yang-Ho;Park, So-Hyeon;Lee, Ju-Young;Jang, Byoung-Choon;Lee, Ki-Sang
    • Korean Journal of Soil Science and Fertilizer
    • /
    • v.39 no.4
    • /
    • pp.204-208
    • /
    • 2006
  • This study is to describe continuous-flow analysis (CFA) for the determination of nitrate using hydrazine-copper in plant material and to test precision of this method compared with that of methods, which are RQflex method and salicylic acid method. Samples were leaves of watermelon, cucumber, melon and tomato. Nitrate values measured by the RQflex method were greater than those measured by CFA or salicylic acid method. The correlation of nitrate values between those measured by CFA and salicylic acid method was $R^2=0.9671$, and those measured by CFA between those measured by RQflex method was $R^2=0.9739$. Recovery rate of nitrate added to tissue extract by CFA method was $99.7{\pm}0.25%$.

GUS Expression Driven by Promoter of AtSAGT1 Gene Encoding a Salicylic Acid Glucosyltransferase 1 in Arabidopsis Plants

  • Sendon, Pamella Marie;Park, Jong-Beum;Park, Soon-Ki;Song, Jong Tae
    • Current Research on Agriculture and Life Sciences
    • /
    • v.31 no.2
    • /
    • pp.83-87
    • /
    • 2013
  • AtSAGT1 encodes a salicylic acid (SA) glucosyltransferase enzyme that catalyzes the formation of SA glucoside and SA glucose ester. Here, the AtSAGT1 gene expression patterns were determined in AtSAGT1 promoter::GUS transgenic Arabidopsis plants. As a result, the factors regulating the induction of AtSAGT1 were identified as pathogen defense response, wound response, exogenous application of SA, and jasmonic acid treatment.

  • PDF

Effect of Application of Salicylic Acid on the Plant Growth and Fruit Quality in Strawberry (살리실 산 처리가 딸기 생육과 과실 품질에 미치는 영향)

  • Choi, Hyo Gil;Hwang, Mi Ran;Choi, Kyeun Soo;Kang, Nam Jun
    • Journal of agriculture & life science
    • /
    • v.52 no.5
    • /
    • pp.11-22
    • /
    • 2018
  • Effects of exogenously applied salicylic acid on the growth and fruit quality in 'Maehyang' and 'Sulhyang' strawberry plants was investigated. Growing patterns of 'Maehyang' and 'Sulhyang' strawberry plants based on leaf length, leaf width, leaf area and SPAD values were generally unaffected by foliar or rootzone application of salicylic acid. The fruit weight and soluble solids in 'Maehyang' and 'Sulhyang' strawberry plants have not been influenced by application of salicylic acid. However, firmness of fruits were significantly increased by foliar and rootzone application of salicylic acid. The activities of SOD and POD in the leaves of 'Maehyang' and 'Sulhyang' strawberry plants were also significantly increased by foliar and rootzone application of salicylic acid. Plants were foliar- and rootzone-applied with exogenous salicylic acid(0.5 and 1.0 mM). The levels of $H_2O_2$ and superoxide anions in the leaves of 'Maehyang' and 'Sulhyang' strawberry plants were reduced by foliar or rootzone application of salicylic acid.

Pharmaceutical Studies on Chitosan Matrix: Controlled release of aspirin from chitosan device

  • Lee, Chi-Young;Kim, Sung-Ho
    • Archives of Pharmacal Research
    • /
    • v.10 no.2
    • /
    • pp.88-93
    • /
    • 1987
  • Chitosan ($\beta$-D-glucosaminan) is chemically prepared from chitin (N-acetyl-$\beta$- D-glucosaminan) which is an unutilized natural resource. We now report on the suitability of the chitosan matrix for use as vehicles for the controlled release of drugs. Salicylic acid and aspirin were used as model drugs in this study. The permeation of salicylic acid in the chitosan membranes was determined in a glass diffusion cell with two compartments of equal volume. Drug release studies on the devices were conducted in a beaker containing 5% sodium hydroxide solution. Partition coefficient (Kd) value for acetate membrane (472) is much greater than that for fluoro-perchlorate chitosan membrane (282). Higher Kd value for acetate chitosan membrane appears to be inconsisstent with the bulk salicylic acid concentration. The permeability constants of fluoro-perchlorate and acetate chisotan membranes for salicylic acid were 3.139 ${\times}10^{-7}cm^2$ min up to 60 min and that of 30% aspirin in the devices was 4.739${\times}10^{-7}cm^2$sec upto 60 min. As the loading dose of aspirin in a chitosan device increased, water up-take of chitosan device increased, but in case of salicylic acid it decreased. The release rate increased with increase in the molecular volume of the drugs. Thses result suggest that the release mechanism may be controlled mainly by diffusion through pores.

  • PDF

Influence of Salicylic Acid and Dimethylsulfoxide on Flowering in Lemna gibba $G_3$ (Lemna gibba $G_3$Salicylic Acid와 Dimethylsulfoxide의 영향)

  • 맹주선
    • Journal of Plant Biology
    • /
    • v.27 no.4
    • /
    • pp.215-222
    • /
    • 1984
  • The reversal effect of salicylic acid(SA) on inhibition of flowering in Lemna gibba $G_3$ grown on ${NH_4}^+$-free 1/2H medium under continuous light is modified by ${PO_4}^{2-}$- and $Ca^{2+}$ levels. Dimethylsulfoxide(DMSO) either depresses the SA effect in ${NH_4}^{1}$-free 1/2H medium or amplifies it in E medium. The dual action of DMSO determined by relative levels of macro and micronutrient components is discussed.

  • PDF