• Maxillofacial Plastic and Reconstructive Surgery
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• v.12 no.3
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• pp.8-22
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• 1990

This study was performed to evaluate the histopathologic changes of the rabbit tibial compact bone using internal irrigation with both cold and room - temperature saline on drilling. The medial surface of the rabbit tibia was drilled with specially designed pilot drill (2.0mm in diameter) at 300 rpm. When drilling, two different temperature salines were injected (experimental group I : $4^{\circ}C$ saline, experimental goup Ⅱ : room - temperature saline). And the control group was drilled without cooling agent. The three rabbits in each two experimental and control groups were sacrificed 1, 2, 4, and 8 weeks after. The bone tissues including the bony defects were fixed with 10% neurtal buffered formalin, decalcified with formic acid, embedded in paraplast, and sterile sectioned at 5-6${\mu}m$. And then tissue specimens were stained with H - E and observed under light microscope. The results were as follow : The experimental groups showed early bone repair than the control group at all intervals. They underwent the same course of bone repair until 4 weeks. But the experimental group I showed slightly better bone maturation than the experimental group Ⅱ at 8 weeks.

• Transactions of the Korean Society of Mechanical Engineers
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• v.15 no.1
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• pp.349-354
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• 1991

The power output behavior of the binary cycle composed of two Carnot cycles is analyzed with considering heat transfer processes, in which the finitely constant temperature differences between heat sources and working fluids exists. The power output has the maximum value as an extremum for cycle temperatures and capacities of heat exchangers. In the internally reversible cycle, the power output is independent of the cycle temperature in the intermediate heat exchanger. In this case when the total capacities of heat exchangers are given, three heat exchangers have the same capacities at the maximum power output condition. In addition, when the cycle is not extremum for cycle temperatures and capacities of heat exchangers. At the maximum power output condition, the capacity of heat exchanger at the cold side is slightly more than the hot side as the cycle effectiveness decreases.

• Korean Journal of Pharmacognosy
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• v.50 no.4
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• pp.272-276
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• 2019

Corylopsis gotoana has been widely used as a traditional medicine for the treatment of lots of disease including cold, edema and vomiting. However pharmacological and phytochemical studies on the C. gotoana are extremely limited. Here in this study, the author investigated the anti-nociceptive effects of the methanolic extract of Corylopsis gotoana (MCG) using various pain models. In the present study, MCG exhibited strong and dose-dependent anti-nociceptive activities on various experimental pain models including thermal nociception and chemical nociception, compared to positive control such as tramadol and indomethacin. In addition, the result from combination test using naloxone, analgesic activity of MCG was slightly reduced, indicating that MCG acts as a partial opioid receptor agonist. These results demonstrated that MCG has potent analgesic potential and thus it may be possibly used as a valuable anti-nociceptive agent.

• Journal of Chest Surgery
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• v.6 no.2
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• pp.213-218
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• 1973

Raynaud attempted to clarify the situation concerning symmetrical and spontaneous gangrene in a thesis published in 1952. The disease was defined as Raynaud`s phenomenon without associated and contributing conditions or disease, and described as two types, such as, `locale syncope and asphyxia` and `gangrene`. Predilection of Raynaud`s disease for female under 40 years of age wi-thout any vascular occlusive disease beginning in the early decades of life and typical color changes in the skin of the extremities incited by coldness are outstanding features in this disease. One typical case of Raynaud`s disease is presented with relating references. Patient was 24 year old female single patient, who noted pain, numbness, and cyanosis of the finger tips of both hands for 6 years previously in the winter season, and recently such symptoms were aggravated including her both feet for two years even in the summer after exposure to cold water. Physical and laboratory examination revealed nothing specific except slightly glistening tight face and hypertrophy of both finger tips with clammy coldness. FamiliaI and past history revealed nothing specific abnormal contributory factors. Biopsy of skin on the dorsum of right foot one year before this admission revealed no evidence of scleroderma. Treatment was aimed to relieve vasospasmodic reaction to coldness and was very successful with bilateral lumbar and thoracic sympathectomy. Patient is free of symptoms relating to the Raynaud’s phenomenon after sympathectomy for 6 months including winter season.

• Korean journal of food and cookery science
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• v.27 no.2
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• pp.125-133
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• 2011

The aim of this research was to evaluate the effects of rosemary and kimchi powder on the quality characteristics of pork patties. Cooked pork patties was stored at $3^{\circ}C$ for 15 days. Rosemary powder, either alone or with Kimchi powder, was highly effective in inhibiting lipid oxidation. The AV and TBARS values of R4(additional group of 4% rosemary powder) and RK(additional group of 2% rosemary powder +2% kimchi powder) were slightly lower than those of the control group. Sensory preferences for pork patties decreased with increased of storage time period. In a sensory evaluation, R4 showed the low sensory scores, whereas RK was highly evaluated compared to control. In conclusion, we determined that the pork patties with added 2% rosemary powder and 2% kimchi powder had the most favorable antioxidant effects and sensory qualities.

• Journal of Advanced Marine Engineering and Technology
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• v.25 no.6
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• pp.1220-1227
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• 2001

The condensation pressure drop fur refrigerant R-22 flowing in the plate and shell heat exchanger were investigated experimentally in this study. Two vertical counterflow channels were formed in the exchanger by three plates of commercial geometry with a corrugated trapezoid shape of a chevron angel of $45^{\circ}$. The condensing R-22 flowing down in one channel exchanges heat with the cold water flowing up in the other channel. The effects of the mean vapor quality, mass flux, average imposed heat flux and system pressure of R-22 on the pressure drop were explored in detail. The quality change of R-22 between the inlet and outlet of the refrigerant channel ranges from 0.03 to 0.05. The present data showed that pressure drop increases with the vapor quality. At a higher mass flux, pressure drop is higher for the entire range of the vapor quality. Also, a rise in the average imposed heat flux causes an slight increase in the Pressure drop. Finally, at a higher system pressure the pressure drop is found to be slightly lower. Correlation is also provided for the measured pressure drops in terms of the friction factor.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.2
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• pp.128-138
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• 1994

To improve seed vigour in rice, barley and soybean, several methods of presowing treatment, using chemicals and priming in polyethylene glycol solution, were investigated. Gibberellic acid($GA_3$) slightly improved germination of rice, but other chemical treatments showed no beneficial effect on seed vigour. Aged seeds were primed in polyethylene glycol solution then rinsed and germinated with drying back. In general mean germination time increased and percentage germination decreased with in- creasing water potential of the priming solution, but there were no significant effects on spread of germination times. Priming also showed no marked improvement in germination under cold, wet, or osmotic conditions. None of the treatments used was successful in practically improving the seed germination and vigour of the tested crops. However, seed treated with GA$_3$ gave the best overall germination response.

• The Journal of the Korean dental association
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• v.9 no.5
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• pp.235-239
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• 1971

The effects of folic acid on the oral mucosa of albino rats were histochemically studied in the twenty four male rats, weighing abut 100gm. Seven groups of 3 each were injected with 0.2ml folic acid (folic acid 0.5mg. was dissolved in physiological saline 0.2ml) subcutaneously, during 1,2,3,5,7,10 and 14 days respectively. Oral mucosa of rats sere removed from upper molar region and fixed in 10% formalin, cold absolute alcohol, Carnoy's solution and acetone. The serial sections were histochemically stained by McManu's PAS reaction, Mowry's metachromasia, alloxan-Schiff reaction, and azo dye method for alkaline phosphatase. The comparative staining method was hematoxylin-eosin stain. The results were as follows: 1) Alkaline phosphatase reaction of stratum spinosum and stratum granulosum tended to increase after 7 and 10 days of folic acid administration. 2) PAS reactions of basement membrane and lamina propria increased after folic acid administration. 3) Metachromasia of stratum spinosum and stratum granulosum were slightly increased after 3,5 and 7days of folic acid administration and returned to the level of Control after 10 days. 4) In the oral mucosa, alloxan-Schiff reaction increased after 7 days of folic acid administration.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.25 no.6
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• pp.860-867
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• 2001

In this study, condensation heat transfer experiments were conducted with plate and shell heat exchangers(P&SHE) using R-22. An experimental refrigerant loop has been established to measure the condensation heat transfer coefficient of R-22 in a vertical P&SHE. Two vertical counter flow channels were formed in the P&SHE by three plates of geometry with a corrugated trapezoid shape of a chevron angle of 45°. Downflow of the condensing R-22 in one channel releases heat to the cold upflow of water in the other channel. The effect of the refrigerant mass flux, average heat flux, system pressure and vapor quality of R-22 on the measured data were explored in detail. The results indicate that at a higher vapor quality the condensation heat transfer coefficients are significantly higher. A rise in the refrigerant mass flux causes an increase in the h(sub)r. Also, a rise in the average heat flux causes an increase in the h(sub)r. Finally, at a higher system pressure the h(sub)r is found to be slightly lower. Correlation is also provided for the measured heat transfer coefficients in terms of the Nusselt number.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.24 no.3 s.174
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• pp.710-717
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• 2000

Tensile and fracture toughness tests of the cold-rolled STS 304 steel plate for membrane material of LNG storage tank were performed at wide range of temperatures, 11 IK(boiling point of LNG), 153K , 193K and 293K(room temperature). Tensile strength significantly increases with a decrease in temperature, but the yield strength is relatively insensitive to temperature. Elongation at 193K abruptly decreases by 50% of that at 293K, and then decreases slightly in the temperature range of 193K to 111K. Strain hardening exponents at low temperatures are about four times as high as that at 293K. Elastic-plastic fracture toughness($J_c$) and tearing modulus($T_{mat}$) tend to decrease with a decrease in temperature. The $J_c$ values are inversely related to effective yield strength in the temperature range of 111K to 293K. These phenomena result from a significant increase in the amount of transformed martensite in low temperature regions.