• 보존과학연구
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• s.34
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• pp.50-61
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• 2013

The Grave encapsulated by lime soil mixture were excavated with clothing and hemp shoes from the Choseon Dynasty in Gooam, Sacheon. Hemp shoes have wood in the center and their surroundings were made of complex materials including herbaceous ones but the front part was lost or became very fragile. We analyzed the hemp shoes and pre-test of consolidant for conservation treatment of hemp shoes. As a result of analyzing, three kinds of plants were identified. For hemp shoes, Oryza spp, hemp, and one kind of dicotyledones were used and it was analyzed that fabrics attached to the back of Dogaengi was cotton. Conservation methods for pre-test of consolidant, Polyethylene Glycol, Paraloid-B72, Dammar gum, Methyl Cellulose and Silicone resin was selected. The solution was sprayed twice in a 24-hour duration. Properties of consolidant was measured; color difference, glossiness difference, folding streangth and tensile streangth. By comparing the results, PEG was confirmed to the most suitable as consolidant. For the conservation treatment, cleaning and strengthening was conducted. For strengthening treatment, PEG 4000 was selected given that the shoes were made of complex materials. The PEG impregnation method was applied with the PEG 4000 concentration gradually changing from 5% to 80% for reinforcement. Then humidity- controlled drying in order to avoid any rapid environment change.

• Journal of Korean Society of Forest Science
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• v.83 no.4
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• pp.505-511
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• 1994

Seeds of Rigitaeda pine tree(Pinus rigida${\times}$P. taeda) was primed with polyethylene glycol(PEG-6000) under different PEG concentrations, treatment period, and temperatures to test uniformity of germination. Coated seeds and PEG treated seeds were sown to compare germination, emergence, establishment, and seedling growth. The results obtained are summarized as follows : 1. As the concentration of PEG increased, as total germination percentage of pine tree was increased. Total germination percentage of pine tree seeds primed with PEG at 15 or $20^{\circ}C$ was better than the seeds treated at $10^{\circ}C$ compared to untreated seeds. 2. Germination rate was improved as primed period long and level of PEG concentration high. 3. Maximum germination rate was high with long PEG treatment period, and markedly improved when the seeds were primed at $20^{\circ}C$ 4. Priming with PEG at $20^{\circ}C$ for 12 days reduced time taken for germination. 5. Osmoconditioned seeds accelerated germination under drought condition with injurious effect of coated seeds by some chemicals. 6. There were much differences in establishment and dry matter production between drill and oversowing method, and primed seeds showed better performances than the coated seeds. Coating effects to seeds were better under drought soil condition rather than moderate moisture condition.

• Clinical and Experimental Pediatrics
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• v.46 no.11
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• pp.1089-1094
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• 2003

Purpose : Polyethylene glycol(PEG) with electrolytes has been used for intestinal clearance for colonoscopy and operations in children. But its efficacy and safety for disimpaction in children with chronic functional constipation has been studied little. Methods : This study enrolled 26 patients with chronic functional constipation(11 children had failed to disimpaction by conventional management at OPD) who were admitted to the Eul-Ji Hospital between May 2000 and July 2003. PEG with electrolytes was administered per oral and/or rectal enema. We observed the effects for disimpaction by measuring the frequency and consistency of stools, and by simple abdominal X-ray. We evaluated the safety by measuring serum electrolytes and osmolarity in three hours after PEG with electrolytes administration, and by observation of the clinical status of the patients. The protocol of PEG with electrolytes was a dose of 60-80 mL/kg within three hours per oral and/or of 15-25 mL/kg by rectal enema. Results : In all patients, simple abdominal X-ray films showed improvements of fecal impaction. Consistency and frequency of stool were improved in all patients except one. As for side effects, diarrhea developed in three patients(11.5% of all patients). Headaches developed in one patient(3.8% of all patients) but it improved without treatment. Serum electrolytes was checked in 16 patients after PEG with electrolytes management and mild hypernatremia(146 mmol/L) was checked in one patient. Serum osmolarity was checked in 11 patients after PEG with electrolytes management and was normal in all patients. Conclusion : PEG with electrolytes was effective and safe for disimpaction in children with chronic functional constipation, including patients who had failed in disimpaction by conventional management.

• Membrane and Water Treatment
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• v.9 no.5
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• pp.353-361
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• 2018

Fouling characteristics of humic substances on tight ultrafiltration (UF) membrane have been investigated. The tight UF membrane was prepared by blending polysulfone (PSf) in N.N-dimethylacetamide (DMAc) with 25%wt of Polyethylene glycol (PEG400) and 4%wt of acetone. Fouling characteristic of the modified PSf membrane was observed during peat water filtration in different trans-membrane pressure (TMP). It was found that the acetone modified membrane provided 13% increase in TMP during five hours of peat water filtration, where a stable flux was reached within 150 minutes. Meanwhile, the increase of TMP from 10 psig to 30 psig resulted in a fouling resistance enhancement of 60%. Furthermore, based on the fouling analysis, fouling mechanism at the first phase of filtration was attributed to intermediate blocking while the second phase was cake formation.

• Membrane and Water Treatment
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• v.9 no.1
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• pp.1-7
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• 2018

The principal objective of this study is to investigate the effect of Polyethylene Glycol (PEG) crosslinking in Polyvinylidene Fluoride (PVDF) in immobilization of Fe and bimetallic Fe/Cu and Cu/Fe zero valent particles on the membrane and its efficiency on removal of nitrate in wastewater. PVDF/PEG polymer solution of three weight compositions was prepared to manipulate the viscosity of the polymer. PEG crosslinking was indirectly controlled by the viscosity of the polymer solution. In this study, PEG was used as a modifier of PVDF membrane as well as a cross-linker for the immobilization of the zero valent particles. The result demonstrates improvement in immobilization of metallic particles with the increase in crosslinking of PEG. Nitrate removal efficiency increases too.

• Membrane and Water Treatment
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• v.6 no.5
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• pp.379-392
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• 2015

Polyvinyl chloride (PVC) ultrafiltration membrane was prepared by blending 12 wt.% of PVC in N, N-dimethylacetimide (DMAc) with polyethylene glycol 400 (PEG400) as an additive. The influence of PEG400 concentration on the PVC membrane morphology, permeability, fouling and rejection were investigated. Fouling and rejection of the PVC membrane were characterized by dextran T-100 filtration. The results showed that membrane water flux was increased up to $682Lm^{-2}h^{-1}$ when 28 wt.% of PEG400 was added into the PVC membrane solution. The best membrane performance with a low fouling and a high selectivity was achieved by adding 12 wt.% concentration of PEG400, which resulted in 90% rejection of dextran and 90% of flux recovery ratio. At further addition of PEG400 concentration, irreversible fouling was starting to increase. A 90% of irreversible fouling was formed in the PVC membrane when more than 22 wt.% of PEG400 is added.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.12 no.sup1
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• pp.111-117
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• 2009

Constipation is one of the most common symptoms that a child visits pediatrician. The general approach to the child with functional constipation includes the following steps; disimpaction, maintenance and withdrawal of medication. There are many drugs which can be applied to children; osmotic agents (lactulose, sorbitol, magnesium hydroxide/citrate, polyethylene glycol with/without electrolytes, sodium phosphate, glycerin), stimulants (senna, bisacodyl, caster oil), lubricant (mineral oil), bulking agent (psyllium, cellulose, glucomannan). At each stage of treatment, one or some of these drug can be applied to the purpose. The author tries to summarize recent studies on drugs for constipation in child, and finally introduces new dugs for constipation which is under investigation.

• Mycobiology
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• v.29 no.1
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• pp.54-57
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• 2001

Field studies were conducted over two seasons during the summers of 1997 and 1998 to investigate the effects of different spatial arrangements(random or highly aggregated) of sclerotia of Sclerotinia sclerotiorum and alginate pellet types(bran or polyethylene glycol) on colonization of sclerotia by Trichoderma spp. Treatment with alginate pellets increased the mean percentages of sclerotia colonized by Trichoderma spp. in both years. Distribution patterns of sclerotia affected the mean percentage of sclerotia colonized by Trichoderma spp. in both years, indicating that a highly aggregated distribution of sclerotia was more favorable to colonization by Trichoderma spp. The effects of the different pellet types(bran or PEG) were not siginificant in both years(P>0.05). The application of higher densities(200 pellets per 1 $m^2$) of alginate pellets resulted in higher mean percentages of sclerotia colonized by Trichoderma spp. in 1998(P<0.05), but did not in 1997.

• Journal of the Korean Society of Tobacco Science
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• v.15 no.2
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• pp.123-129
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• 1993

Mesophyll protoplasts derived from young leaves of Nicotiana rustica and N. tabacum cv Burley 21 were fused with the aid of polyethylene glycol(PEG). Cytological examination of protoplasts after PEG treatment revealed 12.8 % heterokaryocytes. After 7 weeks culture, the hybrid calli showing greenish white with a compact appearance were selected in contrast to parental type calli tinged with white or green color. The somatic hybrid plants were verified by morphological, biochemical and cyclological analysis. A heterosis effect for plant vigor and height was observed but the shape of leaves and flower characteristics were intermediate between N. tabacum and N. rutstica. The isozyme banding patterns for peroxidase of somatic hybrid lines were compared with the parent species. A number of isozyme bands derived from both parental species were found in the hybrids. Somatic hybrid plants have been successfully backcrossed to the parental N. tabacum particularly with somatic hybrid plants as female parents. These hybrid plants yielded small seeds, only few which were germinable.

• Proceedings of the PSK Conference
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• 2002.10a
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• pp.418.1-418.1
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• 2002

Recombinant interferon alpha is widely used for the treatment of diseases including chronic hepatitis C. However. it has drawbacks such as relatively short serum half-life and rapid clearance like other therapeutic proteins. Using PFGylFltioo which is one of the well-established methods to fulfill the requirements of a long-lasting form of protein. wIe prepared mono-PEG modified interferon alpha-2a in which polyethylene glycol moiety was covalently attached to the amino groups of interfelon alpha-2a. (omitted)