• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.47
• /
• pp.163-174
• /
• 2002

Peanut is one of the principal oil seeds in the world as a rich source of edible oil and protein. Peanut quality arises as a result of a complex interaction of genetic, physiological and biochemistry processes that produce the chemical composition of the peanut seed. The major factors influencing seed quality are degree of maturity and digging and drying, curing and storage as a series of harvesting. The end products, peanut butter, salted seed, confections, roasting stock and by-products are favored in world-wide because of their unique roasted peanut flavor, Literatures are reviewed mainly focusing on the physiological properties and nutritional quality of oil, protein and flavor in peanut. Chemical properties of protein and oil, and volatile flavor component in peanut seeds are studied. The objectives of this paper were to review and summarize the results obtained from the improving quality breeding program and evaluation of the chemical composition in peanut up to now.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2015.05a
• /
• pp.50-51
• /
• 2015

In marine and coastal environments, penetration of chloride ions is one of the main mechanisms causing concrete reinforcement corrosion. Currently, most of experimental investigations about submerged penetration of chloride ions are started after the four weeks standard curing of concrete. The further hydration of cement and reduction of chloride diffusivity during submerged penetration period are ignored. To overcome this weak point, this paper presents a numerical procedure to analyze simultaneously cement hydration reaction and chloride ion penetration process. First, using a cement hydration model, degree of hydration and phase volume fractions of hardening concrete are determined. Second, the dependences of chloride diffusivity and chloride binding capacity on age of concrete are clarified. Third, chloride profiles in hardening concrete are calculated. The proposed numerical procedure is verified by using chloride penetration test results of concrete with different mixing proportions.

• Archives of Pharmacal Research
• /
• v.19 no.1
• /
• pp.18-22
• /
• 1996

Acrylate-terminated poly (ethylene glycol) (PEG) macromer was prepared by the reaction of PEG with acryloyl chloride. Photopolymerization of PEG macromer resulted in the formation of cross-linked PEG network. Interpenetrating polymer networks (IPNs) based on PEG and poly(acrylic acid) (PAA) was obtained via template polymerization of AA to the PEG network by UV curing. The swelling degree of the IPNs hydrogel increased with an increase of pH value due to the association-dissociation between carboxylic acid of PAA and either of PEG through hydrogen bounding. The swelling-deswelling behavior proceeded reversibly for the IPNs upon changing pH. Release of indomethacin from the IPNs demonstrated "on-off" regulation with pH fluctuation.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.13 no.5
• /
• pp.420-425
• /
• 2000

Crosslinked polyethlyene/silane crosslinked polyethylene(XLPE/SXLPE) blends were prepared by a twin screw extruder and their water tree growing electrical breakdown and crossinking characteristics were investigated. The water tree characteristics of XLPE were improved by the addition of SXLPE when samples were crosslinked only by the thermorolysis of DCP (dicumyl peroxide). However steam curing process was not good for water tree characteristics. It was also found that the rate of water tree growing of XLPE/SXLPE blend increased when the content of SXLPE was 50%. AC breadown strength slightly increaed by the addition of SXLPE to XLPE when samples were crosslinked only by the thermorolysis of DCP. It was also found that the degree of crosslinking of XLPE/SXLPE blends were higher than that of XLPE in the case of the content without steam crosslinking process.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2005.07a
• /
• pp.238-239
• /
• 2005

With the aim of developing XLPE insulation for extra high voltage cable, we investigated the morphology of cross-linked polyethylene. We used a kind of base materials and additives, and controlled curing condition and amount of additives. The effect of addition of additives on morphology of XLPE such as lamellar density, orientation and additive layer were analyzed using TEM analysis. We applied this result to diffused additive amount was analyzed using FT-IR analysis, and the change of microstructure as the degree of additive diffusion was analyzed using TEM analysis.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2019.11a
• /
• pp.126-127
• /
• 2019

Ultrasonic method is useful in determining the compressive strength of concrete as a nondestructive testing technique. As the velocity of the ultrasonic wave changes depending the aging of fresh concrete, it is possible to use the ultrasonic method to measure the degree of concrete curing on site. Recently, the use of steel reinforced concrete is ever increasing. This study is to examine the effect of aging concrete on the velocity of ultrasonic wave so that the compressive strength of concrete can be predicted in the presence of steel inclusions.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2019.11a
• /
• pp.85-86
• /
• 2019

In this study, when the normal concrete became a $20^{\circ}C$ image after the exposure time at an external temperature of $-15^{\circ}C$, the limit point of the early frost damage was analyzed. As a result, it was confirmed that the degree of concretion was higher than the external level after carrying in and after exposure, and that the initial Tokai damage was observed after 12 hours of exposure.

• Journal of Acupuncture Research
• /
• v.19 no.6
• /
• pp.256-263
• /
• 2002

Objective : This study is to report the radiological change after bee venom therapy about the patient of sequestrated disc. Methods : there was a report that the bee venom therapy was effective treatment on the patient of extruded or sequestrated disc. So we treated the patient who was diagnosed as sequestrated disc and hospitalized, and investigated the change of DITI, simple X-rays and MRI before and after treatment. Results : There was remarkable improvement in condition of the patient who had extruded or sequestrated disc after treated by bee venom therapy. It showed that the region of sequestrated L4-5 dise remarkably decreased in MRI, degree of scoliosis decreased from 17 degree to 15 degree in simple X-ray and the difference of right and left became equal in DITI through the follow-up survey. Conclusions : There was reports that bee venom therapy had antinflammatory and antalgic effect and was effective in treating patient of sequestrated disc and in curing pain, functional disorder, and clinical symptom of HIVD patients by means of grade index of lumbago. We think that the result of this study will be supporting data (that will be able to) proves more objectively the change following the improvement of condition with radiological check.

• Membrane Journal
• /
• v.3 no.2
• /
• pp.60-69
• /
• 1993

The polyamic acid (PAA) based on 3,3', 4,4'-benzophenonetetracarboxylic dianhydride(BTDA)-3,3', 4,4'-dipheylsulfonetetracarboxylic dianhydride(BAPP), 2,2-bis(4-[4-aminophenoxyl]phenyl) propane(DSDA)-3,3', 4,4'-dipheylsulfonetetracarboxylic dianhydride(BAPP), and 3,3',4,4'-benzophenonetetracarboxylic dianhydride(BTDA)-4,4'-oxydianiline(4,4'-ODA) was synthesised. The casted PAA films were partially imidised and the permeation properties of these PAA films for $O_2$ and $N_2$ were investigated according to the degree of imidisation. When the degree of imidisation was increased by curing, the permeabilities of the PAA films were increased for a while and then decreased. These results show that the increase of gas permeation by the disappearence of strong hydrogen bond is larger than the decrease of gas permeation by the dense effect. The decrease of hydrogen bond between molecular chains of PAA suddenly increases the vibration of the chain to make holes but the compaction in polymer chain gradually decreases the gas permeation. The largest values of permeability of BTDA-BAPP, DSDA-BAPP and BTDA-4,4'-ODA film was 8.3, 0.3 and 0.8 barrer respectively, and the imidisation content corresponding to the values of the largest permeability was 37, 47 and 55% each. But the permselctivities of the PAA films were not changed by the variation of the degree of imidisation.

• Polymer(Korea)
• /
• v.37 no.1
• /
• pp.121-126
• /
• 2013

UV-curable high refractive index di-functional epoxy acrylate, 4,4'-thiodibenzenethiol diglycidyl ether diacrylate, was synthesized from acrylic acid and 4,4'-thiodibenzenethiol diglycidyl ether that was obtained by reacting 4,4'-thiodibenzenethiol and epichlorohydrin using a direct method (Taffy process). Its chemical structure was identified by $^1H$ NMR and FTIR. After its dilution with a reactive diluent, 2-phenoxythiol ethyl acrylate as 5, 10, 15, 20, and 30 wt% content, the relationship between their viscosity and refractive index was investigated. Their degree of cure decreased with increasing the amount of reactive diluent, and the refractive index of UV-cured film increased with increasing the degree of cure.