• 한국응용과학기술학회지
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• 제30권1호
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• pp.116-126
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• 2013

Glycol ethers는 페인트에 흔히 사용되는 ethylene glycol의 alkyl ethers에 기반을 둔 용제들이다. 이 용제들은 일반적으로 저분자량 에테르와 알코올의 용제 친화적 성질과 더불어 더 높은 비등점을 가지고 있다. Union Carbide Corp.는 "Glycol ethers"를 하나의 미국 상표로 등록했으며, 이는 제약, 자외선차단제, 화장품, 잉크, 염료 및 수성페인트에서 찾아볼 수 있다. 반면 glycol ethers는 그리스 제거제, 세제, 에어로졸 페인트와 접착제에서도 발견된다. 대부분의 glycol ethers는 수용성, 생분해성이며, 아주 적은 수의 glycol ethers만이 유독성이라고 여겨진다. 그러므로 glycol ethers는 환경에 부작용을 낳을 것 같지는 않다. 최근 연구는 glycol ethers에 작업상 노출되는 것이 남성 정자의 저 운동성과 연관이 되어 있다고 제시했지만, 이는 다른 이들에 의해 반박되어지고 있다. 본 연구에서는 3가지 종류의 glycol ethers의 피부침투성에 관해 용제와 세제의 조합을 사용하여 시험관을 통해 연구한다. Methyl glycol ethers, ethyl glycol ethers and butyl glycol ethers의 흡수는 쥐의 피부를 통해 시험관에서 측정되었다. Epidermal membranes는 Franz diffusion cells에 세워졌으며, 그들의 PBS 침투율은 glycol ethers가 epidermal surface에 적용되기 전, 피부의 보전을 위해 처리하였다. 개별 glycol ethers의 흡수율은 최대 흡수 파장(${\lambda}_{max}$)에서 흡광도를 측정하여 결정하였으며, 침투율의 측정은 esters와의 접촉을 이유로 장벽 기능 내 불가역 변화를 정량화하였다. 시험관 실험 결과 glycol ethers의 종류는 methyl glycol ethers > ethyl glycol ethers > butyl glycol ethers의 순에 따라 빠르게 나타났다. 피부침투는 저분자량 피부침투, 친수성과 같은 화학적구조의 차이에서 유익했다. 이는 분배계수와 용해 방법 및 수동확산이 전달이 고려되는 곳에서 속도를 올렸기 때문이다.

• 한국염색가공학회지
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• 제13권4호
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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.

• 한국임상수의학회지
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• 제4권1호
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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.

• Journal of Pharmaceutical Investigation
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• 제12권4호
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• pp.145-152
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• 1982

Data from IR spectroscopy and X-ray diffractometry were used for the characterization of sulpiride polyethylene glycol coprecipitates related with polymorphism of sulpiride. Sulpiride Form II transformed to Form I during coprecipitating with polyethylene glycol and the transformation rate is increased in proportion to molecular size of polyethylene glycol and the content of polyethylene glycol in coprecipitate.

• 대한수의학회지
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• 제38권3호
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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.

• 한국초지조사료학회지
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• 제10권2호
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• pp.70-76
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• 1990

The present study elucidates the effect of drught by polyethylene glycol solution on germination of five temperate and two tropical grasses. The results obtained can be summarized as follows: 1. The germination percentage of seven grasses decreased with increasing concentration of polythylene glycol. 2. The germination pattern hi higher concentration of polyethylene glycol showed similar trends to the emergence pattern under drought stress in soil condition. 3. The treatment of 30g is most useful at this study. Therefore, polythlene glycol was the appropriate to creat the drought condition of soil.

• Korean Chemical Engineering Research
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• 제54권2호
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• pp.206-212
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• 2016

Experimental data are reported on the phase equilibrium of propoxylated neopentyl glycol diacrylate in supercritical carbon dioxide. Phase equilibria data were measured in static method at a temperature of (313.2, 333.2, 353.2, 373.2 and 393.2) K and at pressures up to 27.82 MPa. At a constant pressure, the solubility of propoxylated neopentyl glycol diacrylate for the (carbon dioxide + propoxylated neopentyl glycol diacrylate) system increases as temperature increases. The (carbon dioxide + propoxylated neopentyl glycol diacrylate) system exhibits type-I phase behavior. The experimental result for the (carbon dioxide + propoxylated neopentyl glycol diacrylate) system is correlated with Peng-Robinson equation of state using mixing rule. The critical property of propoxylated neopentyl glycol diacrylate is predicted with Joback and Lyderson method.

• 반도체디스플레이기술학회지
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• 제17권2호
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• pp.47-52
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• 2018

The three polyols, poly(trimethylene ether) glycol 2000, poly(tetramethylene ether) glycol 2000 and poly (tetramethylene ether) glycol 1000 were reacted with 4,4-diphenylmethane diisocyanate to get polyurethanes. The synthesized three polyurethanes were measured by FT-IR, NMR for investigating chemical structures. Through two spectroscophical methods, It is found that urethane group exists in the three polymers. From the evaluation of hardness, glass transition temperature, tensile strength, and water resistance, the results showed increasing order of Poly(tetramethylene ether) glycol 1000 > Poly(trimethylene ether) glycol 2000 > Poly(tetramethylene ether) glycol 2000 with the content of hard segment in polyurethane.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2001년도 추계학술발표대회
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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.

• 한국응용과학기술학회지
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• 제5권1호
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• pp.41-51
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• 1988

Aliphatic aldehyde polyoxyethylene glycol acetals were synthesised through the reaction of aliphatic aldehydes such as caproic aldehyde, capryl aldehyde, capric aldehyde and lauric aldehyde with excess diethylene glycol, triethylene glycol and tetraethylene glycol, respectively. The acetal formation, in which water was azeotropically distilled by adding benzene to the reaction system, was gained a good yield of acetal type compounds. This reaction is found pseudo first order reaction at various temperatures such 70, 80, 90 and $97^{\circ}C$. Also these activation energies of reaction of acetal type products such as caproic aldehyde diethylene glycol acetal, capryl aldehyde diethylene glycol acetal, capric aldehyde diethylene glycol acetal, lauric aldehyde diethylene glycol acetal, caproic aldehyde triethylene glycol acetal and caproic aldehyde tetraethylene acetal were 17.3, 19.6, 21.2, 21.6, 15.5 and 14.7 Kcal/mole.