• 제목/요약/키워드: Salicylic Acid

검색결과 369건 처리시간 0.023초

제제방법(製劑方法)이 정제(錠劑)의 함량균일성(含量均一性)에 미치는 영향(影響) (Effect of Maunfacturing Methods on Content Uniformity of Tablets)

  • 이민화;최후균;김길수
    • Journal of Pharmaceutical Investigation
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    • 제11권1호
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    • pp.6-14
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    • 1981
  • Safety, efficacy and reliability are the three basic criteria that define the quality of any well-designed pharmaceutical dosage form. Content uniformity directly bears on each of the three criteria defining the quality of drug product. Effect of manufacturing methods and physicochemical properties of the drug on content uniformity of tablets was investigated. Chlorpheniramine maleate and micronized salicylic acid were used as main ingredients. Three different methods for incorporation of main ingredients with diluents were solvent mixing method, geometric dilution method, and simple mixing method. The solvent mixing method was the best one of the three.

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개에서 발생한 아연 결핍성 부전각화성 과각화증의 증례 (A Case of Zinc-Deficient Parakeratotic Hyperkeratosis in a Dog)

  • 나기정;김기흥;최석화;양만표
    • 한국임상수의학회지
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    • 제14권2호
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    • pp.361-364
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    • 1997
  • The paper is to report a case of zinc-deficient parakeratotic hyperkeratosis in a dog. In this dermatosis, although an available diagnosis of zinc-deficient dermatosis is to analyse the serum or hair zinc Bevels, exact analysis of zinc is difficult and unreliable due to contamination of zinc by various environmental, physiologic and disease-related factors. Diagnosis may be performed by history, physical examination and blood chemical analysis. Laboratory evaluation revealed hypercholesterolemia and low activities of serum alkaline photophatase and total protein. The dog showed thick crusts at the elbows joint, stifle joint and testis. Zinc sulfate is administered per oral to patient with application of salicylic acid added vaseline ointment on hyperkaratic lesions. The dog is successfully cured.

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Catalytic Activity of Supported Rhodium(I) Complex for the Carbonylation of Nitrobenzene: Mechanism for Carbamate Formation

  • Kim, Jin-Hyung;Kim, Dae-Won;Cheong, Min-Serk;Kim, Hoon-Sik;Mukherjee, Deb Kumar
    • Bulletin of the Korean Chemical Society
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    • 제31권6호
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    • pp.1621-1627
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    • 2010
  • The investigation of the catalytic activity of supported rhodium(I) complex [Rh(P-S)$(CO)_2$] (P-S; polymer anchored salicylic acid) toward the reductive carbonylation of nitrobenzene in DMF medium has been reported. Use of basic cocatalysts in the reaction medium enhanced the percentage of more useful phenyl carbamates. Spectroscopic studies indicate that the reaction proceeds through a dimer species [Rh(HS)(CO)(C(O)$OCH_3$)(${\mu}-OCH_3)]_2$ and phenyl isocyanate is formed as an intermediate. A plausible reaction mechanism based on the identification of reactive intermediates from the soluble rhodium variety has been proposed for the carbonylation process.

Nanoemulsions and Nanoparticles Employed as Delivery Vehicles for Topical Active Ingredients to Enhance Stability and Efficacy

  • Arthur Georgalas
    • 대한화장품학회:학술대회논문집
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    • 대한화장품학회 2003년도 IFSCC Conference Proceeding Book II
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    • pp.307-307
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    • 2003
  • Strategies to make finished products more stable and efficacious can take advantage of formulation technologies- ingredients and techniques - to improve their delivery into the skin by both enhanced penetration and delayed release. Nanometer range particles and emulsion droplets can be formed with a selection of either silicone copolyol or conventional organic surfactants and dispersion shear rates sufficient to generate stable submicron droplets. By incorporating these into systems with biomimetic liquid crystalline gel networks in either simple or multiple phase emulsions the skin delivery can be enhanced as shown in tape stripping experiments. Such systems can stabilize labile actives, such as Vitamin C and retinol, and aid delivery. Laboratories in U.S and Europe investigated actives including green tea polyphenols, salicylic acid and methyl and benzyl nicotinate.

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Suppressive Effects of Propolis in Rat Adjuvant Arthritis

  • Park, Eun-Hee;Kahng, Ja-Hoon
    • Archives of Pharmacal Research
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    • 제22권6호
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    • pp.554-558
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    • 1999
  • The effects of ethanolic extract (EEP) of propolis on chronic inflammation were evaluated using rat adjuvant arthritis. In the chronic inflammatory animal model, the arthritis index was suppressed by EEP treatments (50 mg/kg/day and 100 gm/kg/day, p.o.). Moreover, physical weakness, induced by the chronic disease state, was dose-dependently improved in the EEP-treated groups. It s analgesic effect, assessed using the tail-flick test, was comparable to prednisolone (2.5 mg/kg/day, p.o.) and acetyl salicylic acid (100 mg/kg/day, p.o.). In carrageenan rat hind paw edema, which was conducted to test the effects of subfractions of EEP, the petroleum ether sub-fraction (100 mg/kg, p.o.) showed an inhibitor effect on the paw edema whereas EEP (200 mg/kg, p.o.) showed a significant anti-inflammatory effect at 3 and 4 hrs after carrageenan injection. From these results, we conclude that the ethanolic extract of propolis had a profound anti-inflammatory effects on both chronic and acute inflammations.

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Aromatic hydrocarbon분해세균의 검출과 그 plasmid유전자의 특성 (Isolation of aromatic hydrocarbon-degrading bacteria and genetic characterization of their plasmid genes)

  • 김치경;김종우;김영창;민태익
    • 미생물학회지
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    • 제24권1호
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    • pp.67-72
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    • 1986
  • Aromatic hydrocarbon degrading bacteria were isolated from industrial waste by using an agar plate method. The isolate DY-1 was identified as Acinetobacter sp. and found to utilize phenanthrene as tis sole carbon source. THe bacteria were proved to produce salicylic acid as an intermediate from phenanthrene through naphthalene pathway, when the products in the culture were wxamined by thin-layer chromatography. THe $Phn^+$ genes were found to be involved in two plasmids of about 4 and 40kb which were lost and not detected in the DNA samples prepared from the mitomycin C-cured cells by a gel electrophoretic analysis.

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Effects of salicylic acid on UV-B-induced oxidative stress and ultrastructure of leaves in cucumber seedlings

  • Kim, Tae-Yun;Kim, Hyo-Jin;Hong, Jung-Hee
    • 한국환경과학회:학술대회논문집
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    • 한국환경과학회 2006년도 학술발표회 발표논문집
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    • pp.403-405
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    • 2006
  • Cucumber (Cucumis sativus L.) seedlings were irradiated or not irradiated with UV-B for several days in environment controled growth chambers. The first leaves irradiated with UV-B were retarded in growth but simultaneously acquired a remarkably high tolerence to oxidative stress, as induced by SA treatment, compared with the non irradiated leaves. Observed within 1 d after the start of UV-B and was maintained during the 5 d period of UV-B treatment. There were low rates of growth and photosynthesis in cucumber plants when treated with SA, suggesting alterations in anatomy and ultrastructure organisation of chloroplasts. Exogenous application of SA diminished chloroplast photosynthetic activity.

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Differential expression and in situ localization of a pepper defensin (CADEFl) gene in response to pathogen infection, abiotic elicitors and environmental stresses in Capsium annuum

  • Do, Hyun-Mee;Lee, Sung-Chul;Jung, Ho-Won;Hwang, Byung-Kook
    • 한국식물병리학회:학술대회논문집
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    • 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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    • pp.78.2-79
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    • 2003
  • Pepper defensin ( CADEFl) clone was isolated from cDNA library constructed from pepper leaves infected with avirulent strain Bv5-4a of Xanthomonu campestris pv. vesicatoria. The deduced amino acid sequence of CADEFl is 82-64% identical to that of other plant defensins. Putative protein encoded by CADEFl gene consists of 78 amino acids and 8 conserved cysteine residues to form four structure-stabilizing disulfide bridges. Transcription of the CADEF1 gene was earlier and stronger induced by X campestris pv. vesicatoria infection in the incompatible than in the compatible interaction. CADEF1 mRNA was constitutively expressed in stem, root and green fruit of pepper. Transcripts of CADEFl gene drastically accumulated in pepper leaf tissues treated With Salicylic acid (SA), methyl jasmonate (MeJA), abscisic acid (ABA), hydrogen Peroxide (H$_2$O$_2$), benzothiadiazole (BTH) and DL-${\beta}$-amino-n-butyric acid (BABA). In situ hybridization results revealed that CADEF1 mRNA was localized in the phloem areas of vascular bundles in leaf tissues treated with exogenous SA, MeJA and ABA. Strong accumulation of CADEF1 mRNA occurred in pepper leaves in response to wounding, high salinity and drought stress. These results suggest that bacterial pathogen infection, abiotic elicitors and some environmental stresses may play a significant role in signal transduction pathway for CADEF1 gene expression.

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Identification of Putative MAPK Kinases in Oryza minuta and O. sativa Responsive to Biotic Stresses

  • You, Min Kyoung;Oh, Seung-Ick;Ok, Sung Han;Cho, Sung Ki;Shin, Hyun Young;Jeung, Ji Ung;Shin, Jeong Sheop
    • Molecules and Cells
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    • 제23권1호
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    • pp.108-114
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    • 2007
  • The mitogen-activated protein kinase (MAPK) signaling cascade is critical for regulating plant defense systems against various kinds of pathogen and environmental stresses. One component of this cascade, the MAP kinase kinases (MAPKK), has not yet been shown to be induced in plants following biotic attacks, such as those by insects and fungi. We describe here a gene coding for a blast (Magnaporthe grisea)- and insect (Nilaparvata lugens)-responsive putative MAPK kinase, OmMKK1 (Oryza minuta MAPKK 1), which was identified in a library of O. minuta expressed sequence tags (ESTs). Two copies of OmMKK1 are present in the O. minuta genome. They encode a predicted protein with molecular mass 39 kDa and pI of 6.2. Transcript patterns following imbibition of plant hormones such as methyl jasmonic acid (MeJA), ethephone, salicylic acid (SA) and abscisic acid (ABA), as well as exposure to methyl viologen (MV), revealed that the expression of OmMKK1 is related to defense response signaling pathways. A comparative analysis of OmMKK1 and its O. sativa ortholog OsMKK1 showed that both were induced by stress-related hormones and biotic stresses, but that the kinetics of their responses differed despite their high amino acid sequence identity (96%).