리파아제 및 프로테이나아제와 같은 생분해성 효소는 지방산 에스테르 및 트리글리 세라이 드뿐만 아니라 지방족 폴리에스테르를 가수 분해가 가능하다. 본 연구에서는 생분해성 효소가 자연 환경 에서 PLA, 옥수수 전분 및 폴리에틸렌글리콜 등의 천연 지방족 폴리 물질이 분해에 중요한 역할인 생 분해성을 측정했다. 본 실험에서는 PLA, PLA와 폴리에틸렌아크릴레이트, PLA 그라프트 중합체인 폴리 에틸렌글리콜아크릴레이트를 사용한 PLAcoPolyethylene의 생분해성에 대해 실험하였다. 생분해성 고분 자를 합성할 때. 이들의 기계적 특성은 생분해성도, 열적특성, 실시간으로 폴리머 수지의 전기적 모니터 링을 통해 실험측정 결과, BOD와 PLAcoPolyethylene의 생분해도는 PLA와 그라프트 공중합된 폴리에 틸렌아크릴레이트는 다른 시료보다 낮은 속도로 측정되었다.

Caffeic acid is a kind of phytochemicals occurred in coffee, which is worked as a carcinogenesis restrainer and antioxidants on the human body. In this study, as one type of caffeic acid derivatives, methoxypolyethylene glycol caffeate(MPC) was synthesized by the esterification between caffeic acid and methoxypolyethylene glycol with N,N'-dicyclohexyl carbodiimide, 4-dimethylamino pyridine. The synthesized product was confirmed by using FT-IR and 1H-NMR, thin-layer chromatography. And these compound was investigated as antioxidant, Tyrosinase hindrance and skin moisturizers. In the free radical scavenging study, antioxidant effect of MPC was averagely high than the red ginseng extract that be used as a natural antioxidants. The result of Tyrosinase anti-activity test was better than embryo bud of rice extract at low concentration. At the iNOS anti-activity tested by using Raw 264.7 cell, and confirmed anti-inflammatory function. For the MPC handled with sodium lauryl sulfate, was tested for the skin moisture content and skin moisture loss.

In this study, block copolymer of polystyrene and polyethylene glycol methyl ether methacrylate(PEGMA) by ATRP(atom transfer radical polymerization) method was synthesized. 4 arm-molecule which contained halogen atom was synthesized for an initiator. With 4 arm-molecule monodispered polystyrene were synthesized by ATRP method. The molecular change of synthesized monodispersed polystyrene with respect to time was investigated and living polymer characteristic was confirmed. Block copolymer of polystyrene and polyethylene glycol methyl ether methacrylate(PEGMA) was synthesized by ATRP with macroinitiator which was synthesized from the monodispersed polystyrene(Mn=12000). The molecular weight of obtained PS-b-PEGMA was 22,000.

본 연구는 젖소에 있어서 다량의 수정란을 생산하여, 고능력의 유전인자를 조기에 확산할 수 있도록, 젖소에 있어서 PEG를 이용하여 과배란 처리기법 확립을 위해 실시하였으며, 그 결과는 다음과 같다. 1. 성선자극호르몬의 처리 방법에 따른 황체반응은 Folltropin 단독처리시 , Folltropin+EB는 , Folltropin+PEG는 로 나타났으며, 유의적인 차이를 보였다(p<0.01). 2. 성선자극호르몬의 처리 방법에 따른 이식 가능 수정란 수

본 실험에서는 한우에 있어서 PEG를 이용한 FSH의 투여 방법에 따른 과배란 유기 방법 및 수정란 이식의 효율을 조사하였다. 과배란 처리는 대조구를 포함하여 네 그룹으로 나누어 비교 실험하였으며, 대조구는 12시간 간격으로 1일 2회, 4일간 50 mg의 FSH를 근육주사, 처리구 1은 30% PEG에 용해시킨 400 mg의 FSH를 1회 피하주사, 처리구 2는 30% PEG에 용해시킨 200 mg의 FSH를 1회 피하주사, 그리고 처리구 3은 30%

α-sulfonated fatty acid polyethylene glycol esters with polyethylene oxide(addition, 3, 5, 10mol) were synthesized through esterification of α-sulfonated fatty acid methyl esters with alkyl chain length C12~C18. Their compounds were separated with column chromatography, and confirmed by TLC. Quantitative analysis of all the sulfonates were performed according to JIS K-3362 method, and ethylene oxide unit number were determined by ISO 2270 method. Structural properties of α-sulfonated fatty acid methyl esters and their derivatives were also identified from IR, and 1H NMR spectra.

All the surface activities including surface tension, foaming power, foam stability, emulsifying power, dispersion effect, and detergency were measured and critical micelle concentration(cmc) was evaluated in dilute aqueous solution. The cmc evaluated by the Ring method was 10-3~10-4mol/L in case of monoesters, and 10-3~5.0×10-5mol/L in case of diesters, respectively. Surface tension of the aqueous solution was decreased to 45~50dyne/cm, showing the tendency that the ability of lowering the surface tension was dependent on increasing of carbon atom number in alkyl chain. Foaming power of all the monoesters was better than that of diesters. while foam stability of diesters was to the contrary. Emulsifying power of soybean oil or benzene was specially expected to be good for emulsifiers in industrial application fields. HLB values of monoesters and diesters evaluated by Griffin's method were in the range of 8 to 12. Dispersion property of ferric oxide was stable in the range of 4.5×10-5~5.0×-4mol/L in case of monoesters, and 10-5~10-4mol/L in case of diesters.

Background: The present study assessed the response of kenaf (Hibiscus cannabinus L., Jangdae) seed to NaCl and the effects of polyethylene glycol (PEG) on kenaf seed germination and vigor. Methods and Results: Seed germination ranged from 11.3% to 58.8% after 24 hours of immersion in NaCl concentrations from 0% to 0.5%. The priming treatments had lower electrical conductivity (EC) values for the seeds than for the control and a deteriorated palisade layer. Priming in 10% PEG for 48 hours increased the germination upto 96.3% in H2O solution and 98.8% in 0.3% NaCl solution compared to that of the control (78.8%). Germination synchronization, and shoot and root growth of the primed seeds were greater than those of the control. The T50 of the control in H2O and 0.3% NaCl solution was 22 and 28 times, respectively. After priming, nine times was sufficient to reach T50 in both solution. The mean number of days to germination (MDG) decreased from 1.43 days for the control to 0.55 days for 0% PEG in H2O solution and from 1.57 days for the control to 0.56 days for 0% PEG in 0.3% NaCl solution. The dry weight after the 10% PEG treatment was higher than that of the control. Conclusions: Taken together, 10% PEG treatment for 24 hours is recommended for kenaf seed invigoration before planting.

Polyethylene glycol (PEG) solution is currently used to prepare the colon before colonoscopy. Hyponatremic encephalopathy is a condition with neurologic symptoms such as headache, vomiting, confusion, seizure, and sometimes respiratory arrest. A 55-year-old woman presented to our emergency department with generalized tonic-clonic seizure and mental change after ingestion of PEG solution 2 L with water. Serum sodium concentrations was 115 mmol/L. After correction with hypertonic saline for 12hrs, serum sodium concentration reached 129 mmol/L and mental status recovered. We experienced a case of acute hyponatremic encephalopathy resulting from ingestion of PEG solution 2 L for colonoscopy.

The activated sludge obtained from wastewater coke oven plant was immobilized by entrapment with polyethylene glycol (PEG). The effects of several factors on the biodegradation of CN- from synthetic wastewater were investigated using batch and continuous reactors. The degradation rate of CN- increased with increasing of the immobilized bead volume in the reactor. Approximately 7.65 mg/L of NH4-N was produced upon the degradation of 35 mg/L of CN-. When high concentrations of the toxic cyanide complex were used in the testing of cyanide degradation, the free activated sludge could be inhibited more than that of the immobilized activated sludge. When the phenol concentration was higher than 400 mg/L in the synthetic wastewater, approximately 98.4% of CN- was removed within 42 hours by the immobilized activated sludge. However, the cyanide was not completely degraded by the free activated sludge. This indicates that high phenol concentrations can act as a toxic factor for the free activated sludge. A CN- concentration of less than 1 mg/L was achieved by the immobilized sludge at the loading rate of 0.025 kg CN-/m3-d. Moreover, it was found that the HRT should be kept for 48 hours in order to obtain stable treatment conditions.

자운영(Astragalus sinicus L. Line A) 종자의 발아와 묘신장을 네 온도(15, 25, 30 및 35℃ ), 세 polyethylene glycol(PGE) 10,000(MW) 용액(0, 20 및 25g/100mg H2O ), 그리고 다섯수준의 황산(중량기준 conc. H2 SO4 : Seeds; 0, 1:1 10분, 1:1 20분 1:1.5 10분 및 1:1.5 20분 침지)에 처리하여 측정한 결과를 요약하면 다음과 같다. 자운영의 발아율은 15℃ 에서 가장 높았으나 묘장은 25℃ 에서 가장 길었다. 발아율과 묘장 모두 PEG 무처리에서 25로 농도가 증가할수록 급격히 감소되었다. 15℃ 의 PEG 20과 25에서는 다른 온도보다는 높은 발아율을 보였다. 황산처리효과에서는 발아율과 묘장 모두 황산무처리와 같거나 감소되었다. 그러나 PEG 무처리의 경우에는 황산:종자비율 1:1.5에서 10분간 침지시에 발아율이 가장 높았다. 본 시험의 결과로는 종자의 발아는 수분의 영향이 가장 큰 것으로 보였다.

온도(15℃ 및 30℃ )와 PEG용액(O, 20, 30 및 35g / 100g H2O ) 농도를 달리여 대두품종(방사콩, Hill 콩, 팔달콩, 두엽콩, 백운콩, 광교, 장엽콩 및 황금콩)의 발아와 묘신장 반응을 측정하였다. PEG 용액 농도의 조절은 상온에서 0.0, -0.5, -1.1 및 -1.5 MPa 수분포텐셜을 기초로 하였다. 시료의 채취는 15℃ 에서 3, 6, 9 및 12일 간격으로, 30℃ 에서는 1, 2, 3 및 4일간격으로 실시하였다. 품종당 15립의 종자를 plastic petridish 안의 Whatman No.1(9cm) 여지위에 자동 주사기로 0.2% 0.2% Thiram을 첨가한 농도별로 PEG용액을 15ml 씩 조절하였다. Plastic petri-야노를 Cap으로 대하여 15℃ 및 30℃ 항온의 무광조건하에서 발아시켰다. 8개 품종의 묘수분함량과 묘장이 15℃ 및 30℃ 에서 공히 PEG용액 농도가 증가할수록 감소되었다. 묘수분함량과 묘장의 품종간차이가 두 온도에서 공히 발견되었다. 대립중이 소립중보다 많은 양의 수분을 흡수하였으나 수분함량(%)은 소립중이 높았다. Hill 콩과 팔달콩은 두 온도에서 공히 PEG 용액농도 20에서 30g/100g H2O 까지 타품종들에 비교하여 큰 묘장을 보였다. 본 시험의 연구결과에서 PEG용액 농도에 대한 대두발아반응 시험으로 조기시 출현 증진을 위한 대두품종 선발 가능성이 있음을 보였다.