• 한국환경보건학회지
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• 제6권1호
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• pp.53-55
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• 1979

This study was conducted to find out the co-operative effect of antioxidants (butyl hydroxy anisol, dibutyl hydroxy toluene, propyl gallate) and pyrophosphate (tetrasodium pyrophosphate, disodium pyrophosphate) on the stability of soybean oil by determining the peroxide values. The results obtained were summarized follows: 1. When antioxidants and pyrophosphates were used together, the antioxidants activity was more strong than antioxidants were used only. 2. The co-operative effect of disodium pyrophosphate for antioxidants was stronger than tetrasodium pyrophosphate.

• Journal of Chest Surgery
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• 제25권7호
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• pp.723-726
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• 1992

We have experienced two cases of video thoracosopic excision of mediastinal tumors at the department of thoracic and cardiovascular surgery, Yonsei University, College of medicine. Histologically the mediastinal tumors were cystic thymoma in one & bronchogenic cyst in another. The operative times were rather short and the post-operative courses were not eventful. These patients were discharged with less chest discomforts in post-operative 5 days & have been in good conditions to now.

• Journal of Chest Surgery
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• 제14권4호
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• pp.403-407
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• 1981

Thirty-five cases of heart disease were operated on with cardiopulmonary bypass between November, 1980 and September, 1981. 1. There were 8 cases of congenital anomaly and 17 cases of acquired heart diseases. 2. There were 7 male and ] 8 female patients, with a mean age of 21 .9 years [range 7 to 42 years]. 3. There were 2 cases of valve replacement cases with operative mortality of 8.3%. 4. Operative mortality for congenital anomaly was ~ 6.7% and 5.9% for acquired heart diseases. 5. Over all operative mortality was 11.4%.

• Clinics in Shoulder and Elbow
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• 제1권1호
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• pp.72-77
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• 1998

We treated 5 elbows with post-traumatic flexion contractures (mean contracture: 51 degrees) by arthroscopic anterior capsular release and post-operative alternative flexion and extension splint. Each elbow had been resistant to at least six months of conservative therapy. An incongruent ulno-humeral articulation was considered to be a contraindication to this procedure. All patients complained of the residual deformity and some functional deficit. All patients, after failure of non-operative therapy, desired a operative treatment. At follow-up(mean 21.8 months), there was a mean post-operative contracture of 19 degrees, which is within a functional range of motion. So we conclude that arthroscopic capsular release in selected patients is reasonable alternative to open release.

• Journal of Dairy Science and Biotechnology
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• 제16권2호
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• pp.154-160
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• 1998

The purpose of consumer sensory tests is to assess the personal response by current or potential customers of a product or specific product characteristics. There are several sources of bias in obtaining consumer response than often lead to misleading results. These biases include the situational variables of the testing environment, the products and the subjects. This paper discusses the sources of bias in consumer testing, need to be controlled when conducting consumer test.

• Restorative Dentistry and Endodontics
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• 제13권1호
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• pp.139-150
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• 1988

The purpose of this study was to evaluate the marginal adaptation of Class V resin restorations by the filling techniques. The cavities were filled with Heliosit$^{(R)}$ light curing composite resin system in accordance with the following three filling techniques - bulk-pack placement technique, apical to occlusal layering placement technique, and buccolingual layering placement technique. And the interface between the restoration and the tooth structure was observed with scanning electron microscope. The following results were obtained. 1. Marginal adaptation of enamel showed excellent irrespective of the filling techniques. 2. Marginal leakage of dentin was observed irrespective of the filling techniques. 3. No difference of marginal adaptation according to the filling techniques was observed in light curing composite resin.

• Journal of Chest Surgery
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• 제11권3호
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• pp.281-295
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• 1978

Last year in this department 100 cases of open heart surgery were done annually. This year 200 cases of open heart surgery were scheduled. During the first 6 months of this year 112 open heart surgery cases were done with 13 deaths [11.6%]. There were 72 cases of cougenital malformation with 9 operative deaths [12.5%], consisting of 23 acyanotic cases with one death [4.5%] and 49 cases of cyanotic cases with 8 deaths [16.3%]. Out of 40 tetralogy of Fallot, 6 cases expired [15%]. For 39 cases of acquired valvular heart disease and one Ebstein anomaly valves were replaced with 4 operative deaths [10%]. Single valve replacement in 33 with 3 operative deaths and double valve replacement in 7 cases with one death were noted. Two patients expired among 28 mitral valve replacement cases [7.1%]. Among 7 double valve replacement patients, consisting of 3 mitral and aortic and 4 mitral and tricuspid valve replacement one case expired. In a case of Ebstein anomaly, tricuspid valve was replaced with plication of atrialized right ventricle successfully. The operative result was excellent.

• Journal of Chest Surgery
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• 제16권1호
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• pp.49-54
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• 1983

Fifty-Seven Cases of tricuspid valve replacement were done from April 1976 to January 1983. Fourteen congenital and 43 acquired cases were found. In 13 cases tricuspid valve alone was replaced with 2 operative deaths and one late deaths. In 35 cases TVR and MVR were done with 6 operative deaths and 6 late deaths. In 9 cases TVR, MVR, and AVR were done with one operative deaths. Over all operative mortality was 15.8% and late mortality 12.3% among the 48 survivors. Over all Survival rate was 71.9% during follow-up period ranging from 8 months to 6 years and 9 months. In every case TVR was done with bioprosthetic xenograft valves.

• 대한치과의사협회지
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• 제11권2호
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• pp.131-133
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• 1973

A Case of a supernumerary teeth on the buccal side of upper right and left molar teeth was observed from a 21 years young Korean female. The characteristics were as follows : 1. The site of the occurrence were resemble on the right and left sides. 2. The cusps of the supernumerary tooth on the right side were resemble to the premolar, and the cusp of the left one was added by one more cusp than the normal molar tooth. 3. The supernumerary teeth were smaller than the normal teeth size. 4. The right and left teeth had only one root.

• 한국환경보건학회지
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• 제5권1호
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• pp.21-24
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• 1978

This study was conducted to find out the co-operative effect of antioxidants (butyl hydroxy anisol, dibutyl hydroxy toluene, propyl gallate, dl-$\alpha$-tocopherol) and organic acid (citric acid, tartaric acid, succinic acid) on the stability of soybean oil by active oxygen method. The results obtained were summarized as follows: 1. When antioxidants and organic acid were used together, the antioxidants activity was more strong than antioxidants were used only. 2. The co-operative effect of citric acid for antioxydants was the strongest whereas succinic acid was the weakest. 3. The co-operative effect of phenolic antioxydants for organic acid was more strong than dl-$\alpha$-tocopherol.