• Title/Summary/Keyword: exudation

Search Result 92, Processing Time 0.024 seconds

Study on Degradation Characteristics and Chemical Cleaning Methods of Plasticized PVC for Conservation of Plastic Artifact (연질 PVC 작품 보존을 위한 가소제 종류별 열화 특성 및 화학적 세척법 연구)

  • Lee, Na Ra;Chung, Yong Jae
    • Journal of Conservation Science
    • /
    • v.35 no.2
    • /
    • pp.159-168
    • /
    • 2019
  • Plasticizers, which are added to plastics, can cause exudation, which means that the plasticizer comes out from surface of the plastics. This causes the surface of plastic artworks to become sticky, and this allows dust and pollutants to become attached to the surface. Therefore, in this study, the degradation characteristics and chemical cleaning methods of each type of plasticizer are evaluated using PVC specimens. To evaluate the degradation characteristics and chemical cleaning methods, microscopic observation, chromaticity and weight measurement, and FT-IR spectroscopy were performed. The results showed that PVCs containing different plasticizers have different degradation patterns. Especially, the PVC containing TOTM showed discoloration and exudation. In the evaluation of the chemical cleaning methods, ethyl alcohol and KOH solution showed good effects, but their stability was not good. Surfactant was found to have a good cleaning effect and stability as a cleaner for exudated plasticizers.

Two Cases of Diagnosis and Treatment in Canine juvenile cellulitis (Canine juvenile cellulitis의 진단과 치료 증례)

  • 황철용;유종현;강형석;윤화영;한홍율
    • Journal of Veterinary Clinics
    • /
    • v.19 no.4
    • /
    • pp.467-470
    • /
    • 2002
  • Canine Juvenile cellulitis was diagnosed in 2 puppies hospitalized in Veterinary Medical Teaching Hospital of Seoul National University. Characterized dermatological problems were presents of scale, crust, purulent exudation and alopecia limited on their face. On cytologic examinations of direct impression smears for the lesions, numerous neutrophils and macrophagies were observed. No bacteria and fungus were noted. Treatments with administration of predinisolone and antibiotics orally combined with topical shampoo treatment had good results for the two puppies.

Studies on the anti-infiammatory activity and its mechanism of daidzein (Daidzein의 항염작용과 그 작용기전에 관한 연구 (I))

  • 허인회;이상준;김형춘
    • YAKHAK HOEJI
    • /
    • v.31 no.3
    • /
    • pp.154-163
    • /
    • 1987
  • Daidzein and its methyl derivatives were synthesized and their anti-inflammatory activities were examined. Daidzein suppressed the carrageenin-induced edema, but its methyl derivatives showed decrease or abolition of the anti-inflammatory effect. Daidzein did not significantly suppress the complete Freund's adjuvant-induced arthritis, and the mixed phlogistics (histamine+serotonin)-induced edema. Daidzein inhibited the leukocyte emigration and protein exudation when it was administered into the CMC pouch at low doses (5,25mg/pouch). Daidzein significantly suppressed the cotton-pellet granuloma formation.

  • PDF

Extended-Spectrum $\beta$-lactamase Genes Acquired Multidrug-Resistant Klebsiella pneumoniae in a Dog and Its Owner (개와 보호자에서 Extended-Spectrum $\beta$-lactamase 유전자를 획득한 다약제내성 Klebsiella pneumoniae)

  • Han, Jae-Ik;Jang, Hye-Jin;Kim, Gon-Hyung;Chang, Dong-Woo;Na, Ki-Jeong
    • Journal of Veterinary Clinics
    • /
    • v.27 no.2
    • /
    • pp.125-129
    • /
    • 2010
  • A 2-year-old female Pomeranian dog was referred with multiple pelvic fractures. The surgical correction was performed for the fractures. However, after the surgery, purulent exudation was occurred in the surgical site. Antibiotic susceptibility test revealed that the isolated bacteria are resistant to penicillins, cephalosporins, aminoglycosides, quinolones, and trimethoprim/sulfamethoxazole. Bacterial identification and extended-spectrum $\beta$-lactamase (ESBL) confirming test indicated that the isolated bacteriae is ESBL-producing Klebsiella pneumoniae. Minimum inhibitory concentration (MIC) and maximum bactericidal concentration (MBC) tests revealed that meropenem, one of carbapenems, is the only effective antibiotic. The patient was treated with meropenem for 5 days. After 10 days, the exudation was disappeared and the infection was cured. The molecular typing of the ESBL revealed that TEM-1 ESBL is present in the bacteria isolated from the patient. The bacteria isolated from the owner's palm also revealed that TEM-1 and SHV-1 ESBLs are present.

Root Exudation by Aphid Leaf Infestation Recruits Root-Associated Paenibacillus spp. to Lead Plant Insect Susceptibility

  • Kim, Bora;Song, Geun Cheol;Ryu, Choong-Min
    • Journal of Microbiology and Biotechnology
    • /
    • v.26 no.3
    • /
    • pp.549-557
    • /
    • 2016
  • Aphids are a large group of hemipteran pests that affect the physiology, growth, and development of plants by using piercing mouthparts to consume fluids from the host. Based an recent data, aphids modulate the microbiomes of plants and thereby affect the overall outcome of the biological interaction. However, in a few reports, aboveground aphids manipulate the metabolism of the host and facilitate infestations by rhizosphere bacteria (rhizobacteria). In this study, we evaluated whether aphids alter the plant resistance that is mediated by the bacterial community of the root system. The rhizobacteria were affected by aphid infestation of pepper, and a large population of gram-positive bacteria was detected. Notably, Paenibacillus spp. were the unique gram-positive bacteria to respond to changes induced by the aphids. Paenibacillus polymyxa E681 was used as a rhizobacterium model to assess the recruitment of bacteria to the rhizosphere by the phloem-sucking of aphids and to test the effect of P. polymyxa on the susceptibility of plants to aphids. The root exudates secreted from peppers infested with aphids increased the growth rate of P. polymyxa E681. The application of P. polymyxa E681 to pepper roots promoted the colonization of aphids within 2 days of inoculation. Collectively, our results suggest that aphid infestation modulated the root exudation, which led to the recruitment of rhizobacteria that manipulated the resistance of peppers to aphids. In this study, new information is provided on how the infestation of insects is facilitated through insect-derived modulation of plant resistance with the attraction of gram-positive rhizobacteria.

Lead Induced Organic Acid Exudation and Citrate Enhanced Pb Uptake in Hydroponic System

  • Kim, Kwon-Rae;Owens, Gary;Naidu, Ravi;Kwon, Soon-Ik;Kim, Kye-Hoon
    • Korean Journal of Environmental Agriculture
    • /
    • v.28 no.2
    • /
    • pp.146-157
    • /
    • 2009
  • The influence of Pb-citrate complex formation on Pb uptake and the effect of Pb on organic acid exudation were investigated using four plant species, viz., sunflower (Helianthus annuus L), Indian mustard (Brassica juncea), canola (Brassica napus) and vetiver grass (Vetiveria zizanioides) under hydroponic conditions. Seedlings were exposed to different levels of Pb and Pb-citrate for 24 hrs and subsequently Pb distributions in plant shoot, root and hydroponic solution were measured. The dissolved organic carbon (DOC) concentration generally decreased as the concentration of Pb in the hydroponic solution increased. In contrast to DOC, the total organic acid concentrations exuded from Indian mustard roots significantly increased (424 to 6656 mg $kg^{-1}$) with increased Pb treatment, implying that exuding organic acids were involved in Pb accumulation in Indian mustard. The complexation of Pb with citrate enhanced Pb accumulation in the above ground portions. Lead concentration in Indian mustard increased from 2.05 mg $kg^{-1}$ to 6.42 mg $kg^{-1}$ when the concentration of citrate in solution increased from 0 to 50 mg $L^{-1}$. This result showed enhanced translocation of Pb from root to shoot with observation of transfer coefficient ($K_t$) increase from 2.03E-3 to 5.72E-3.

A CASE REPORT OF GRANULOMA PYOGENICUM (치은유듀에 발생한 Pyogenic granuloma의 일예(화농 육아종))

  • Baek, Seung-Ho;No, Mun-Ho
    • The Journal of the Korean dental association
    • /
    • v.14 no.11
    • /
    • pp.906-908
    • /
    • 1976
  • A case of pyogenic granuloma between left central lncisor and upper left lateral lncisor was observed in an 18year old Korean male. the characteristics were as follow 1) The side of the cuccerence was betweeb gum of the upper left central lncisor and that of the lateral lncisor. 2) It is bright red or purple red anf either friable or firm depending upon its duration in the majority of cases it presents surface ulceration and purulent exudation 3)Granuloma pyogenicum is similar in clinical and microscopic appearance to the conditioned gingival enlargement seen in pregnancy. Differencial diagnosis depends upon the patient's history.

  • PDF

Progress of Pruritus Research in Atopic Dermatitis

  • Lee, Chang-Hoon
    • Biomolecules & Therapeutics
    • /
    • v.18 no.3
    • /
    • pp.246-256
    • /
    • 2010
  • Atopic dermatitis is a common skin disease affecting up to 10% of children and approximately 2% of adults. Atopic dermatitis exhibits four major symptoms, including intense itching, dry skin, redness and exudation. The "itch-scratch-itch" cycle is one of the major features in atopic dermatitis. The pathophysiology and neurobiology of pruritus is unclear. Currently there are no single and universally effective pharmacological antipruritic drugs for treatment of atopic dermatitis. Thus, controlling of itch is a very important unmet need in patients suffering from atopic dermatitis. This article will update progress during the past 10 years of research in the field of pruritus of atopic dermatitis, focusing on aspects of pruritogens (including inflammatory lipids, histamine, serotonin, proteinases, proteinase-activating receptors, neurotransmitters, neuropeptides, and opioid peptides), antipruritic therapies, and emerging new targets. Based on recent progress, researchers expect to identify exciting possibilities for improved treatments and to develop new antipruritic drugs acting through novel targets, such as histamine H4 receptor, gastrin-releasing peptide receptor, MrgprA3, thromboxane A2 receptor and the putative SPC receptor.

The Efficacy Analysis of Endoscopic Third Ventriculostomy in Infantile Hydrocephalus

  • He, Zhenhua;An, Caixia;Zhang, Xinding;He, Xiaodong;Li, Qiang
    • Journal of Korean Neurosurgical Society
    • /
    • v.57 no.2
    • /
    • pp.119-122
    • /
    • 2015
  • Objective : To investigate the efficacy of endoscopic third ventriculostomy (ETV) for infantile hydrocephalus. Methods : Retrospectively reviewed the 17 infantile hydrocephalus cases who were treated with ETV between July 2009 and June 2013. The study includes 17 patients (4 Han and 13 Hui) between the ages of 51 and 337 days. Five cases with encephalitis history and 2 cases with cerebral hemorrhage, with the remaining 10 cases congenital hydrocephalus. ETVs were performed for all patients with 1 case failing because the severe ventricle inflammatory adhesion, excessive exudation, and vague basilar artery. Results : Among the 16 successful cases 7 cases improved remarkably : heads and ventricles reduced and cerebral cortexes thickening morphologically. The ventricles of the remaining cases were unchanged. Conclusion : The ethnic minority account for the majority of the patients in this study. ETV is effective for infantile obstructive hydrocephalus.

A Study on the Lymphangiography Used Hrdro-Static Pressure (Lead Container를 이용(利用)한 임파조영술(淋巴造影術)에 대(對)한 고찰(考察))

  • Park, Jun-Chul;Lim, Han-Young;Lee, Man-Koo
    • Journal of radiological science and technology
    • /
    • v.2 no.1
    • /
    • pp.100-100
    • /
    • 1979
  • For eighteen months from May, 1977, to November, 1978, I found out the following conclusion with the references when the author had the test of Lymphangiography for malignant lymphoma and cervix cancer of uterus who had the suspicion of nodal metastasis who amounted 56 patients. 1. According to the test 40 patients among 56 were succesful, almost 71% of t-them, injecting needles at both pedis, and it showed some technical difficulties in Lymphangioraphy comparing with other diagnostic measure. 2. As the result of Lymphangiography of 56 patients, they complained pains, edema of foot. In the course of finding out lymphatic vessel there was exudation due to high pressure at the insected part. At the process and at that test there have been frequent complains by the patients about some sort of pains and some times severe pains.

  • PDF