사과의 열과원인에 관한 조사연구

권병규,강영호,이우승,성민웅,이상윤,조화석 慶北大學校 生産技術硏究所 1970 生産技術 Vol.4 No.-

It is very important to eliminate the immense economic loss caused by cracking in apples through examining the causes of cracking and divising a possible method of prevention of it. Several investigators published their findings on the causes of the cracking of apples which develop on the skin of Ralls apples. However, no definite conclusions or established methods of prevention have been published to this date. Therefore, in this study the causes of the cracking of apples are examined through the use of several methods: (a) the histological and physiological, (b) the microelemental, and (c) the natural environmental. The results are as follows: 1). At the early stage of growth, the thicknesses of the cuticle, as well as of the subepidermis, were the same in Ralls apples without envelopes, Ralls with envelopes, and Jonathan. However. at maturity. the thicknesses differed in the following manner; Ralls apples without envelopes were thickest: Ralls envelopes were less thick than those without envelopes; while Jonathan apples were thinest. 2). Although in the Ralls without envelopes the epidermis is arranged in a brick wall like layer during maturity, in the middle of August the brick wall like epidermis begins to collapse and is surrounded by the cuticle. The process of cracking seems to start with the lenticle and the fruit spot. 3). The rate of cracking was slowed by application of a mixture of IAA and Bordeaux mixture solution, but cracking was not completely halted by this treatment. 4). The stem of a branch laden with apples was put into a solution containing Mn-54, and after absorption took place the distribution of Mn-54 was measured. The results of the measurements were as follows; the bark contained the most Mn-54; the leaves contained the second largest quantitiy; and the apples has the least. 5). The two orchards which were tested tended to have a low soil pH, and a high concentration of soil-solution Mn. 6). The soil with a high rate of cracking tended to have a high pH, which the soil with a low rate had a low pH. 7). In trees with a high rate of cracking, the amount of Mn in the leaves was equal to the amount in the stalk. However, in trees with a low rate of cracking, the amount of Mn in the leaves tended to be high compared with that found in the stalk. 8). The epidermis of the Ralls had a high Ca content than the epidermis of the Johnathan. 9). The epidermis of cracked apples tended to have a higher content of Ca, K,P, Cu and Fe than the epidermis of sound apples. 10). Amoug the apples tested, 11% cracked during the course of the year, with the cracking starting in the middle of Sept. 1969, This low percentage of cracking can be attributed to the small amount of rain during harvest time (late Sept. and October). The total of the added temperature during May, June, and July was 1962℃. 11). Cracking occurred more frequently in apples on the periphery of the tree, in well-colored apples, on the south side of the apples, and on the cheeks of the apples. These occurrances can perhaps be attributed to the amount of sunlight. 12). In the trees tested with newspaper envelops, cracking occurred in 1.9% of the apples with envelopes, and in 11.9% of the apples without envelopes. In the trees tested with Polysteron paper envelopes, cracking occurred in 2.5% of the apples with envelops, and 13.4% of the apples without envelopes. The apples with Polysteron paper envelopes were less infected by insects than the apples with newspaper envelopes. 13). Cracking occurred in 2.4% of the apples covered with vinyl, while in trees not covered with vinyl, 16.6% of the apples crack. The Artificial precipitation produced during harvest time increased the rate of cracking.

膨脹率이 一定한 超音速 노즐흐름에 있어서 非平衡 凝縮과 傾斜衝擊波

권순범,최태민,김병지 慶北大學校 1990 論文集 Vol.49 No.-

In the present study the case of expansion of moist air through a supersonic nozzle of constant expansion rate, which behaves similar to that of wet steam, was adopted. The effect of noneqilibrium condensation on the oblique shock wave generated by placing the wedge into the supersonic part of the nozzle was investigated. Furthermore, the variation of the condensation onset Mach number with the initial stagnation supersaturation, the relationship between noneqilibrium condensation zone and incident point of the oblique shock wave, the varation of angles of incident and reflected shock waves due to the variation of initial stagnation supersaturation, and the relationship between the height of Mach stem and initial stagnation supersaturation are discussed.

어음의 善意取得에 관한 硏究

權炳敏 광주대학교 1984 광주개방대학 논문집 Vol.1 No.-

As the man who is granted the right is able to obtain only the right of grantor, in case the grantor is considered as the right-fulowner, and substantially the grantor is the unrightfulowner(which means the man who does not have the substantial right, but only have the formal one), if we apply the general principle of private law, which indicates that the grantee can't obtain the right, to the bill derived from the essence of negotiability, it can be the factor of prevention for harmony and safety in dealing with the bill. Thus, as the countermeasure for these cases the goodfaith acquisition system is confined as the system which is granted by the bill's law, we can accelerate the negotiation of bill by that system. in this thesis, in order to protect the negotiability called the essence of bill, I have studied the meaning of bill's regulation on goodfaith acquisition, and next it is necessary for us to exclude the abuse of goodfaith acquisition system, and further more for the goodfaith acquisition system which can be used for the real goodfaith acquisition, I, the researcher, will not only consider the essential factor and effect of goodfaith acquisition, but some problems concerned with the goodfaith acquisition by illustrating the theory of our country and some leading cases.

사과 열과(裂果)의 원인과 그 방지에 관한 연구

권병규,강영호,이우승,성민웅,한강원 경북대학교 1971 生産技術 Vol.5 No.-

On the basis of our hypothesis about the causes of cracking has obtained in our 1969's study, we investigated the relations among the cracking and the microelements, the environmental factors, and the treatment of IAA and GA in two selected orchards. We analyzed and compared with the contents of microelements (Mn, B, zn, and Cu) in leaves and soils of two test orchards (Taegu and Yungju). The results of the study which the causes of cracking of apples are examined through the above three procedures, are as follows: 1. The contents of Mn in soil of Taegu test orchard were total Mn 435.9 ppm, soil sol'n Mn 6.2ppm, and total Mn 284.6 pm in leaves. That of Yungju test orchard were total Mn 595.1ppm, soil sol'n Mn 6.2ppm and total Mn 144.2ppm in leaves. Comparing with Mn optimum contents in leaves Mn contents of Taegu test orchard were higher than the optimum concentration, while those of Yungju were approximately satis-factory. 2. The contents of B in leaves were 3.7ppm in Taegu and 4.6ppm in Yungju. These contents were lower ten times than the optimum contents and were the same deficiency in both test orchards. 3. The contents of Zn in leaves were 5.7ppm in Taegu and 3.8ppm in Yungju. Those contents were both the same deficiency as comparing with the optimum contents. 4. The contents of Cu in leaves were 29.3ppm in Taegu test orchard and 10.6ppm in Yungju test orchard. Comparing with the optimum contents, the contents of Cu were excess in Taegu test orchard, while that of Cu were approximately satisfactory in Yungju 5. The diameter of Ralls apple fruits were increased 1.1% in IAA spraying treatment and 3.1% in GA spraying treatment as comparing with control group 6. The thickness of cuticle layer of Ralls apple fruits were highest and the cuticle treated with IAA and GA was thinner than the control group. 7. New branches of tree with higher cracking rate tended to decrease in length, in figure and size of leaves. 8. The change of diameter in fruits were decreased in higher cracking fruits during day and night. The change of that in IAA and GA group were increased 6.1% and 1.2% respectively compared with the control group. 9. The application of IAA and GA solution slowed the cracking rate by 2.2 and 0.8% respectively compared with the control group 10. In 1970 year the cracking rate of Ralls apple fruit were 6.53% in Taegu and 4.31% in Yungju test orchard. 11. We obtained linear regression of rate of cracking and the summation of temperature during May to August in Taegu area. The summation of temperature was 2428.1℃ during June to August in 1970. When the summation of temperature was increased more than above that of tempera ture, we could expect that it was possible to increase the rate of cracking Ralls apple. An equation in the summation of temperature and the rate of cracking fruits during May to August were obtained y=0.074x-157.50. 12. The investigation indicates that a method of preventing the cracking of Ralls apple is: a. to spray at the optimum time growth hormone which increases the elasticity and elongation of cell wall. b. to alter the composition of soil by putting the organic fertilizer deeply in the ground. c. to replace Ralls apples with new varieties which is strong against cracking and have high quality and economical productivity.

어음抗辯에 관한 小考

權炳敏 광주대학교 1985 광주개방대학 논문집 Vol.2 No.-

We may call plea a bill the reason that a bill debtor who is received demand for a bill can reject the request on the applicant. Under the principle of general private law, if we admit the plea a bill for the good faith acquisitor who acquires a bill, as we rely on only the appearance of a bill instead of recognizing what the plea a bill is, it is necessary to restrict the plea a bill, for it may check the negotiation of a bill. Thus we have admitted the restriction of plea a bill in Article 17 the Law of a Bill. The reason why we have discussed the plea a bill is that various kinds of theories or judicial precedents of many countries are different from their opinions over the plea a bill restriction for the protection of the negotiation of a bill. In this thesis, I have studied various kinds and effects of the plea a bill, and the plea a bill restriction.

어음의 僞造

權炳敏 광주대학교 1986 광주개방대학 논문집 Vol.3 No.-

With the rapid expansion of the capitalistic economy, it is quite natural to see a wide use of bill as a means of business payments and negotiation. The increased negotiation of bill would invite inevitably pathological phenomenon such as the forgery of bill. The most important problem on the forgery of bill is how to treat the holder who has the forged bill and the person whose name is forged. No person whose name is forged takes responsibility incurred by the forged bill, because he didn't draw any bill or have intent to do so. But bill is negotiable from one person to another, holder who has the forged bill should be properly protected, if not, the negotiation of bill would be jeopardized. In this thesis, the writer makes reference to the responsibility of the person whose name is forged, that of the man who forges the bill, and that of the one who signs and seals on the forged bill and so on.

마이크로 그루브 가공의 특성 평가

권동희,박진효,김정석,김병민,정융호,강명창 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-

As demands for micro parts are on the increase in recent industries such as aerospace, biomedical, electronics, environment, information technology and display, the need for manufacturing such parts is also increasing. Major methods of manufacturing micro parts are based on semiconductor process technology such as lithography and etching and non-traditional machining using lasers, ultrasonic, ion-beams or electrical discharge. However, these methods require lots of time, workpiece materials are limited, and such methods are only applicable to the machining of two-dimensional shapes. Therefore, mechanical machining methods are required for the manufacturing of micro parts with complex shapes. This paper presents an investigation on the characteristics for micro groove machining by using the ultrahigh-speed air turbine spindle, and verifies the properties of mechanical method in fabricating molds for micro barrier ribs. As a result, the optimal machining condition could be found from the investigation of surface roughness according to the kinds of burr shapes in the fabricating of iron mold by using micro endmill.

Cadmium과 Di-(2-ethylhexyl) Phthalate에 의한 고환 독성 : 아연과 Apoptosis의 역할 The Role of Zinc and Apoptosis

권민,최병선,박언섭,홍연표,박정덕 중앙대학교 의과대학 의과학연구소 2003 中央醫大誌 Vol.28 No.1

Cadmium (Cd) and di-(2-ethylhexyl) phthalate are used widely and distributed ubiquitously in the environment, which are well-known reproductive toxicants. DEHP and/or Cd causes the apoptosis, degeneration of spermatogenic cells, and massive necrosis, resulting in testicular atrophy. Zinc is an essential metal in spermatogenesis, the zinc concentration in testis is changed in DEHP- or Cd-treated animals. However, the role of zinc or apoptosis in testicular toxicity by DEHP or Cd has not been understood well. In this study, Sprague-Dawley male rats were given DEHP (2 g/kg, 5 ml corn-oil, PO) or Cd (CdCl₂2 mg/kg, 4 ml saline, sc) for 1, 2, 7 and 14 days. Control rats were given vehicle corresponding to each group. At day 1, 2, 7, and 14 after administration of DEHP or Cd, the morphological findings including apoptosis in testes were observed under the light microscope, and the zinc concentrations in testes were determined by atomic absorption spectrometry with flame method. Fas and FasL mRNA in testes were analyzed by RT-PCR method at 12 hours, 1, 7, 14 days after adminstration of DEHP or Cd. Absolute and relative testicular weight were lower in DEHP- or Cd-treated rats than control. DEHP or Cd produced morphological changes in testes, including apoptosis, degeneration, necrosis and massive loss of spermatogenic cells, resulting in testicular atrophy. The zinc concentration in testes was not different at day 1 after administration of DEHP, but was decreased at later times. Testicular zinc was lower at day 1, 2 in Cd-treated rats than control, but was higher at 7, 14 days after Cd administration. The levels of Fas and FasL mRNA were highly expressed in testes after administration of DEHP or Cd. These results suggest that the change of zinc level in testes might be a secondary effect of DEHP- or Cd-induced testicular toxicity, and Fas signal system might be play an important role in pocessing of apoptosis in testes by DEHP or Cd.

過呼吸시 人工死腔 사용에 관한 실험

한성민,최병권 중앙대부설한국의과학연구소 1983 한국의과학 Vol.15 No.1

제2형 당뇨병 환자에서 우연히 발견된 기종성 방광염 1례

박보민,김윤정,이영태,노정현,권수경,김동준,고경수,이병두,임경호,이순희,박정현 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Emphysematous cystitis is an uncommon disease in which bacterias produce gas within the bladder wall and surrounding tissue. Patients with diabetes, neurogenic bladder and chronic urinary tract infection are predisposed to the disease. It is usually caused by E.coli and Klebsiella. Severity of illness ranges from an asymtomatic condition to life threatening cystitis. Succesful management depends on early diagnosis with correction of underlying causes, administration of appropriate antibiotics, establishment of adequate bladder drainage and surgical excision of involved tissue when required. We report a case of 52-year-old woman who did not compain of symtoms of cystitis but epigastric pain, nausea, and vomitting. Emphysematous cystitis was revealed on the abdominal X-ray series incidentally. CT scans of the pelvis showed mottled gas bubble within the bladder. After treatment, the symtoms subsided and plain abdominal film showed no evidence of gas shadow in the pelvic cavity.