• Title, Summary, Keyword: Ethylene glycol

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Decomposition of Ethylene Glycol by Catalytic Wet Air Oxidation (촉매습식산화에 의한 Ethylene Glycol의 분해)

  • 안상준;최장승;이동근
    • Textile Coloration and Finishing
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    • v.13 no.4
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    • pp.264-271
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    • 2001
  • Catalytic wet oxidation of ethylene glycol as refractory compound was studied in a batch slurry reactor using lwt% $Pt/A1_2O_3$, lwt% $Pt/TiO_2,\;Mn/CeO_2$(1:1) and 5wt% $Mn/Al_2O_3$. Experiments were conducted to investigate theeffects of temperature, initial ethylene glycol concentration, catalyst dosage and PH on the ethylene glycol decomposition. When compared with the uncatalyzed reaction, the use of catalysts could increase the rate of ethylene glycol decomposition. The lwt% $Pt/A1_2O_3$ catalyst was preferable to the other catalysts for the destructive oxidation of ethylene glycol. The reaction rate was first order with respect to initial concentration of ethylene glycol. In acidic condition the removal efficiency of ethylene glycol was good, but there was a significant leaching of platinum. Small amount of acetic acid, oxalic acid, masonic acid and formic acid as intermediates were detected during catalytic wet air oxidation of ethylene glycol.

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The Effect of Oral Administration of Ethanol in Ethylene Glycol Intoxication in Dogs (개의 Ethylene Glycol 중독에 대한 에탄올의 경구투여 효과)

  • Part Cheol-Man;Han Hong-Ryul
    • Journal of Veterinary Clinics
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    • v.4 no.1
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    • pp.423-432
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    • 1987
  • The present studies were undertaken in attempt to investigate the therapeutic effect of ethanol in dogs intoxicated with ethylene glycol Three dogs treated with ethylene glycol and other three dogs with ethylene glycol plus 20% ethanol orally were examined on clinical signs, endoscopic views, histopathological findings, and autopsy findings respectively. The results obtained were summarized as fellows : 1. The clinical sings and their severity of dogs intoxicated with ethylene glycol were time related and progressed from vomiting, depression, thirsty, tachycardia, tachypnea, convulsiot ataxia, melena, uremia and coma, but clinical signs of dogs treated with ethylene glycol and ethanol simultaneously only stowed vomiting and thirsty. 2. In the gastroscopic view, the dogs intoxicated with ethyelne glycol showed edematous, hyperemia, errosive and ulcerative lesions in the fundus and body area but the dogs treated with ethylene glycol and ethanol simultanously showed edematous and hyperemic lesions. 3. Oral treatment of ethanol with ethylene glycol simultaneously have reduced the signs of EG intoxications in dogs.

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Clinical and ultrasonographic studies for the diagnosis of ethylene glycol intoxication in dogs (개의 Ethylene glycol 중독 진단을 위한 임상 및 초음파학적 연구)

  • Byun, Hong-sub;Kim, Myung-cheol
    • Korean Journal of Veterinary Research
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    • v.38 no.3
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    • pp.629-641
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    • 1998
  • This study was performed to evaluate the ultrasonographic findings of ethylene glycol intoxication. Ten healthy mongrel dogs which was administered with ethylene glycol, were evaluated in terms of clinical findings, hematological findings, blood chemistry, and ultrasonographic and histopathological findings of kidney. The results obtained through these experiment could be summarized as follows : 1. Typical clinical symptoms such as vomiting, initial apprehension, depression, thirst, dehydration, tremor, anorexia, hematuria, anuria, weakness, weight loss, flaccid paralysis, tachypnea, coma, and death, were revealed after administration of ethylene glycol. 2. Special symptom of bloody diarrhea was occurred by administration of ethylene glycol. 3. After administration of ethylene glycol, PCV was decreased continuously(p<0.01), and total leukocyte count was increased gradually, revealed the highest value at day 5 and thereafter decreased. 4. Remarkable changes of ultrasonographic findings such as high echo intensity of renal parenchyma and emergence of halo in corticomedullary junction, were revealed after administration of ethylene glycol. Early(hour 8) enlargement and late(day 3) enlargement were observed in kidney(p<0.01). Especially, late enlargement was observed concurrently with the elevation of BUN and creatinine values. 5. Calcium oxalate crystals, metabolites of ethylene glycol, were observed in histopathologic findings of kidney. Also, degeneration and necrotic exfoliation of epithelial cells were recognized in addtion to swelling of renal tubules.

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Biological Removal of EG from Weight Loss Treatment Wastewater & Complex Dyeing Process Wastewater

  • Lee, Hyeon-Uk;Im, Dong-Jun
    • 한국생물공학회:학술대회논문집
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    • pp.505-508
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    • 2001
  • An microorganism able to degrade ethylene glycol(EG) was developed. Using this microorganism, biological treatment of ethylene glycol was studied in Erlenmeyer flasks and a laboratory scale stirred loop bioreactor. The removal efficiencies of ethylene glycol from synthetic wastewater were 91.6% ${\sim}$ 97.7% at $30^{\circ}C$ ${\sim}$ $40^{\circ}C$, and 96.3% ${\sim}$ 97.9% at initial pH 9 ${\sim}$ 11 respectively. Also the removal efficiencies of ethylene glycol were found to be more then 92% at initial ethylene glycol concentration of 300mg/L ${\sim}$ I400mg/L. In treatment of weight loss treatment wastewater using Erlenmeyer flasks, the removal efficiencies of ethylene glycol were 79.6%. 82.5%. 77.6%. and 71.3% at initial pH 9. 10. 11. and 12.4 after 11 days of reaction. Moreover in treatment of complex dyeing process wastewater. the residual ethylene glycol was not detected at the initial pH 10.0 and pH 11.3 after 4 days of reaction. When stirred loop bioreactor was used for removing ethylene glycol, the residual ethylene glycol was not detected after 108 hrs and 60 hrs of reaction in batch treatment of weight loss treatment wastewater and complex dyeing process wastewater.

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Effect of Glycerol and Ethylene Glycol on Post-Thawed Sperm Function in Jeju Horse (제주마의 동결정액 제조에 있어 Glycerol과 EthyleneGlycol이 동결 융해 후 정자의 기능에 미치는 영향)

  • Oh, Shin-Ae;Ko, Min-Hee;Ko, Moon-Suck;Lee, Chong-Eon;Park, Yong-Sang;Kang, Tae-Young;Ko, Jae-Hyoung;Cho, Won-Mo
    • Reproductive and Developmental Biology
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    • v.36 no.3
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    • pp.199-206
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    • 2012
  • Cryopreservation induces sublethal damage to the spermatozoa, which leads to their reduced fertile life. This study was designed to determine effect of glycerol and ethylene glycol as cryoprotectant in extender on improve the freezability of Jeju horse semen. The semen was cryopreserved with glucose-EDTA extender containing each 5% glycerol, 5% ethylene glycol, 8% glycerol or 8% ethylene glycol, respectively. Post-thawed sperm were evaluated motility, viability, Membrane integrity and acrosome integrity. Post-thawed sperm motility were not significantly differences among treatments. However, sperm viability were significantly higher (p<0.05) in 8% glycerol ($39.85%{\pm}11.41$) than in 5% glycerol treatment ($18.08%{\pm}1.61$). In membrane integrity, swelling sperm ratio was significantly higher (p<0.05) in 8% glycerol ($34.12%{\pm}11.02$) than other treatments. In the percentage of capacitated sperm assessed by CTC staining, F pattern was significantly higher in 8% ethylene glycol than 5% glycerol and 5% ethylene glycol (p<0.05). B pattern ratio was significantly increased in 5% ethylene glycol compared with 8% glcerol and 8% ethylene glycol (p<0.05). Moreover, 8% ethylene glycol treatment was significantly decreased AR pattern ratio compared with other treatments (p<0.05). It is concluded that treatment of 8% glycerol was improved the sperm viability and 8% ethylene glycol was improved the sperm ascrosome integrity after thawing. However, they were not significantly difference between 8% glycerol and 8% ethylene glycol on post-thawed sperm viability. Therefore, 8% ethylene glycol was more effective sperm cryoprotectant than 8% glycerol in Jeju Horse.

A Study on Electrochemical Properties of Acrylate-based Gel Polymer Electrolyte with Ethylene Oxide Group (Ethylene Oxide기를 갖는 Acrylate계 Gel Polymer Electrolyte의 전기화학적 특성에 관한 연구)

  • Kim, Hyun-Soo;Shin, Jung-Han;Moon, Seong-In;Oh, Dae-Hee
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.17 no.6
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    • pp.608-614
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    • 2004
  • The gel polymer electrolyte was prepared by radical polymerization using tetra(ethylene glycol) diacrylate and tri(ethylene glycol) dimethacrylate to investigate affect of the number of ethylene oxide. The gel polymer electrolyte showed good electrochemical stability up to 4.5 V vs. Li/Li and high ionic conductivity at various temperatures. The lithium-ion polymer batteries with the gel polymer electrolyte, tetra(ethylene glycol) diacrylate- and tri(ethylene glycol) dimethacrylate-based, also represented good electrochemical performances such as rate capability, low-temperature performances and cycleability. However, the cell with tri(ethylene glycol) dimethacrylate, which has three ethylene oxide, showed better electrochemical performance.

The Preparation and Electrochemical Properties of Pore-filled and Polystyrene-based Anion-exchange Membranes Using Poly(ethylene glycol)methyl Ether Methacrylate (Poly(ethylene glycol)methyl Ether Methacrylate를 이용한 세공충전 폴리스티렌계 음이온 교환막의 제조 및 전기화학적 특성)

  • Mun, Hye Jin;Choi, Jae Hak;Hong, Young Taik;Chang, Bong Jun
    • Membrane Journal
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    • v.25 no.6
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    • pp.515-523
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    • 2015
  • While commercial polystyrene-based ion exchange membranes have simple manufacturing processes, they also possess poor durability due to their brittleness. Poly(ethylene glycol)methyl ether methacrylate with hydrophilic side chains of poly(ethylene glycol) was used as a co-monomer to make the membranes have improved flexibility. Hydrophilicity/hydrophobicity of the anion exchange membranes were able to be adjusted by varying the chain lengths of the poly(ethylene glycol). For the preparation of the anion exchange membranes, a porous PE substrate was immersed into monomer solutions and thermally polymerized. The prepared membranes were subsequently reacted with trimethylamine to produce anion exchange functional groups, Quaternary ammonium salts. The prepared pore-filled anion exchange membranes were evaluated in terms of ion exchange capacity, electric resistance, elongation at break and water uptake.

Synthesis of Two-Component Titanate Powders Using Ethylene Glycol Solution (에틸렌글리콜 용액을 이용한 2성분계 Titanate 분말의 합성)

  • 이상진;권명도
    • Journal of Korean Powder Metallurgy Institute
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    • v.9 no.5
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    • pp.346-351
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    • 2002
  • Pure and fine, two-component titanate powders (barium titanate, calcium titanate etc.) were synthesized by an ethylene glycol method. Titanium isopropoxide and other metal ionic salts were dissolved in liquid-type ethylene glycol without any precipitation. In non-aqueous system, the amount of ethylene glycol affected the solubility and homogeneity of metal cation sources in the solution. At the optimum amount of the polymer, the metal ions were dispersed effectively in solution and a homogeneous polymeric network was formed. Most of the synthesized powders had sub-micron or nano-size primary particles after calcination and the agglomerated calcined powders were easily ground by ball milling process. All synthesized titanate powders had stable crystallization behavior at low temperature and high specific surface area after ball milling. The crystallization behavior and the microstructures of the calcined powders were affected on the ethylene glycol content.

Study on the Hydrophilicity of Modified Polyester (개질시킨 폴리에스테르 중합체의 친수성 연구)

  • Jung, Byung-Ok
    • Applied Chemistry for Engineering
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    • v.9 no.6
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    • pp.930-934
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    • 1998
  • The modified poly(ethylene terephthalate) (PET) was synthesized by copolymerizing dimethyl terephthalate with ethylene glycol, polyethyleneglycol, and dodecylbenzene sulfonate as a surfactant. After characterization of viscosity, color, and contant angle, hydrophilic characteristics of the modified PET depending on additives was discussed.

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Clinicopathological Diagnosis of Gentamicin and Ethylene glycol Induced Acute Renal Failure in Dogs (개에서 Gentamicin과 Ethylene glycol에 임상병리학적 진단)

  • 김지현;이영재;이경갑
    • Journal of Veterinary Clinics
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    • v.17 no.2
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    • pp.327-333
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    • 2000
  • The diagnostic method was, evaluated in experimentally induced acute renal failure in doges. Ten male dogs weighing from 5 to 10 kg were assigned to two groups(gentamicin & ethylene glycol treated group) al random. Gentamicin sulfate at 10 mg/kg of body weight, t.i.d., for 7 days and ethylene glycol at 3 ml/kg of body weight once used in a randomized complete block design with tee treatments in block. The samples(blood, urine) were collected before and 1,3,5,7,9 and l1th day after administration. The serum creatinine concentration and BUN(blood urea nitrogen) were sig- nificantly increased at the 7th day than before administration in gentamicin treated group (p<0.05), bolt there was significant increase at the 1st day than before administration in ethylene glycol treated group(p<0.05). The urine GGT(gramma glutamyl transpeptidase) and GGT/creatinine were significantly increased at the 1st (lay after administration in gentamicin treated group (p<0.05). But in ethylene glycol treated group, there was no significant changes. The value of FENa (fractional excretion of sodium) was significantly increased at the 3rd day after administration in gentamicin treated group and the 1 st day after administration in ethylene glycol treated group (p<0.05). These results suggest that FENa was a good parameter of renal function in dogs with acute renal failure.

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