혈중 연 및 아연 분석의 정도에 관한 연구

박정덕,Park, Jung-Duck 대한예방의학회 1986 예방의학회지 Vol.19 No.1

Analyses of lead and zinc were made by means of standard addition method using atomic absorption spectrophotometer(Baird Ltd., Model A5100) with flameless method for lead and flame method for zinc. The blood samples used were merely diluted with triton x-100, because it was simple, rapid and minimal risk of contamination. Mean recovery rate for lead added to the blood ranged from 97.7 to 101.3% with coefficient of variation ranging from 1.9 to 10.7%, and that for the added zinc ranged from 99.0 to 102.2% with coefficient of variation ranging from 2.1 to 9.1%. In repeated measurements of zinc in the blood, good reproducibility and interindividual variation were proved(p<0.01). In comparison of the lead and zinc concentrations in the blood determined by the standard addition method and standard method, there were good correlations between 2 sets of data (r=0.9731 for lead and r=0.9785 for zinc), although lead levels were estimated higher by the former method(p<0.01) and zinc levels by the latter method(p<0.01). It can be concluded that lead and zinc levels in blood standard addition method is reliable for determination of lead and zinc in the blood with good accuracy and reproducibility.

급성 카드뮴중독에 의한 랏트의 간, 신 및 고환조직의 손상에 미치는 Diethyldithiocarbamate의 방어효과

박정덕,정규철 중앙대학교 의과대학 의과학연구소 1989 中央醫大誌 Vol.14 No.2

To investigate the effects of diethyldithiocarbamate (DDTC) on acute toxicity in cadmium in toxicated rat, single doses of 5 mg/kg CdCl_2 were given to Sprague-Dawley male rats by intraperitoneal injection in Cd-treated group, 500 mg/kg DDTC IP injection 60 min after Cd treatment in DDTC-treated group, and saline treatment only in control group. Rats of each group were sacrificed by decapitation 48 hours after the injection. Average cadmium concentrations in liver, kidney and testis for control group were 0.027 ± 0.008㎍/g wet wt, 0.032 ± 0.006 ㎍/g wet wt and 0.004 ± 0,002 ㎍/g wet wt, and those for Cd-treated group were 8.748 ± 0.985 ㎍/g wet wt, 15.947 ± 3.723 ㎍/g wet wt and 0.617 ± 0.140 ㎍/g wet wt, respectively. In DDTC-treated group, hepatic, renal and testicular Cd concentrations were 6.209 ± 0.691㎍/g wet wt, 13.736 ± 1.692 ㎍/g wet wt and 1.438 ± 0.330㎍/g wet wt, respectively. DDTC caused the shift of Cd from liver and kidney to testis. The production of superoxide radicals was increased in liver and kidney of Cd-treated group, whereas catalase activities were reduced. The protein contents in tissue homogenates, cytosolic and mitochondrial fractions, and activities of Cu, Zn-SOD, Mn-SOD and ATPase were not significantly altered by the Cd treatment. In testis of Cd-treated group, although the production of superoxide radical was undetected, the catalase activity and specific activity of'Cu,Zn-SOD were increased, and protein contents of above fractions and activities of Mn-SOD and ATPase were reduced compared to control group. This implies that mechanism of cadmium toxicity to liver and kidney differs from that to testis, suggesting a possible role of oxygen radical induced by cadmium in injury to testis but not to liver and kidney. Since the pattern of change in protein contents, production of superoxide radical, activities of catalase, Cu, Zn-SOD, Mn-SOD and ATPase in the DDTC-treated group were similar to those in the control group, DDTC was considered to be effective in protecting the tissue damage caused by cadmium toxicity. Histopathological findings showing that the tissue destruction of testis was more extensive and severer than those of liver and kidney in Cd-treated group, suggest that testis is more susceptible to cadmium toxicity than liver and kidney. No significant change from control was noted in liver, kidney and testis in DDTC-treated group, indicating the protective effect of DDTC on tissue damages induced by cadmium.

Te 蒸着膜의 電氣的 性質

朴鼎悳 건국대학교 1982 學術誌 Vol.26 No.2

In this study the Te thin film is deposited on the microscope slide glass substrate by means of vacuum evaporator. Evaporation is done under the pressure of 2∼5×10-5 Torr. and the samples are heated at various temperature in electric furnace. After measuring the thickness of the film and its electrical conductivity, the dependence of the electrical properties of the film on its thickness and on the heat treatment of the samples are investigated as follows; 1.The sample evaporated in laboratory temperature does not completely crystalized, its electrical properties being very poor. 2.With heat treatment of 200℃, the electrical conductivity of the sample more than 2μ in thickness is constant but less than 2μ increase.

放射能絶對値測定에 있어서의 計數値補正法에 對하여

朴鼎悳 건국대학교 1969 理工學報 Vol.1969 No.2

Holography 干涉에 의한 變形의 測定

朴鼎悳 建國大學校基礎科學硏究所 1983 理學論集 Vol.8 No.-

Holography is a photographic technology in which an optical picture of an original object is reproduced from the hologram. In this case, the picture cannot be reproduced even by applying natural light to the hologram and a three-dimensional picture is reproducible by applying the light laser beam at the time of hologram preparation. For the preparation of the hologram, an interferometer having laser beams as light source is used. In this case, He-Ne laser(6328Å) is used. The make-up of the unit varies according to the type of an object, the purpose of tests and the kind of laser. Hologram preparation units are devided roughly into two types; i.e. a reflection type for dispersed reflection object and a transmission type for transmitted. Shown in Fig.4 is the make-up of the typical dual beam reflection type holography photographing unit that light beam applied to the specimen passes through two optical paths. In this paper, the results of observation for the strain by holography interferometer system are reported.

放射線의 障害와 許容量

朴鼎悳 공군본부 의무감실 1958 항공의학 Vol.6 No.1

토양오염

朴正德 대한의사협회 1998 대한의사협회지 Vol.41 No.10

성장기 학생들에 있어서 카드뮴과 아연의 혈중 농도

박정덕,최병선,홍연표,장임원 중앙대학교 의과대학 의과학연구소 1996 中央醫大誌 Vol.21 No.2

We analyzed the level of blood cadmium for 245 growing students(135 males and 110 females) aged 6 to 24 years who had not exposed to cadmium as the exposure index for cadmium in general population, and studied the reference value, sex- and age- effect for the blood cadmium, in addition relation with blood zinc. Blood cadmium and zinc determined using atomic absorption spectrophotometry by flameless method for cadmium and flame method for zinc. The mean value of blood cadmium was 0.92㎍/ℓ in arithmetic mean(AM), 0.72㎍/ℓ in geometric mean(GM), and blood zinc was 5.07㎎/ℓ in AM, 5.01㎎/ℓ in GM. Age-adjusted blood cadmium was not significant between male(0.93㎍/ℓ in AM, 0.74㎍/ℓ in GM) and female(0.92㎍/ℓ in AM, 0.69㎍/ℓ in GM), and not observed a difference by sex in blood zinc(male :5.07㎎/ℓ in AM, 5.00㎎/ℓ in GM ; female : 5.07㎎/ℓ in AM, 5.02㎎/ℓ in GM). Blood cadmium and zinc were well correlated with age, and had increasing tendency by age group. The positive relation was observed between the level of cadmium and zinc in blood. In summary, these results suggest that blood cadmium of growing students in general population is valuable as an one of indices for body burden of cadmium by pollution.

食品中에 含有된 放射能 濃度 測定에 關한 硏究 : 1970년도 生産된 農作物에 對하여 Radioactivity in Agricultural Crops Produced 1970

朴鼎悳 건국대학교 1971 學術誌 Vol.12 No.1

The animal and plant on the earth are, directly and indirectly, contaminated by natural and artificial radioactivity. Especially to human, as they are worried to be in damage by radioactivity in their adoption contaminated foods by these radioactivity. The writer has selected about 30 kinds of the agricultural products of 1970 that are to be taken us as daily principal foods, and surveyed the concentration of gross Beta radiation by Geiger Mucller Counter. In the result of the research mentioned above, generaly there contained radio-activity more in beans and vegetables comparing with other crops and it is an careful fact that the crops contained radioactivity don't disregard to the maximum permissible concentration of radioactivity which was adviced by I.C.R.P.

한라산의 自生觀賞植物 利用開發을 爲한 特性調査 硏究 : 開花基를 中心으로 特性調査 A research made at the flowering period

朴正德 제주대학교 1972 논문집 Vol.4 No.-

Geographically the island of Quelpart(Jeju province) is the most southern point in Korea. Its latitude is 32˚2' and 126˚58'E. while the longitude is 32˚56' to 33˚8'N. Quelpart island consists largely of these extinct volcanic peaks surrounding Mt. Halla. Mt, Halla(1952m above the sea level) is the most highest mountain in this island, the slope to sea is gradual. The object of this study is to clarify of the ornamental plants on Mt. Halla and it is believed that those data may be also helpful for academic study. The survey were carried out from March 1972 to December 1972. This paper is concerned with Characteristics of 40 species of ornamental plants. The investigaton of characteristics is devided into 4 subject; 1) Time of sprouting 2) Period of blooming 3) Characteristics flower, size, color, inflorescence and smell. The data of the temperature and rainfall of the district were observed from the data of Seogi-po meteorological station (50 above the sea lebel) The selection of ornamental plants on Mt. Halla can be divided as follows. Deciduous broad leaved forest (600m∼1,200m) Generally, the association of Rhododendrom Yedoense V, poukhanense, Magnolia ssiedoldii, Weigella subsessilis, and Anemone amurensis, Primula jesoana was grow at the hillside. Evergreen Conigorous forest-Srub forest(1,500m-1,900m) The main constituent species of Alpins ornamental plant in this zone are as follows : Thymus guinguecostatus, Aguilegis japonica, Leontopodium coreana, Ranunculus erucilobus, Especially, Abies Koreana, Funiperus chinensis V. sargentii, and Empetrum nigum V. japonica association is well develloped in this zone. The species of which of blooming is lasted longer than 30 days are : Primula modesta Primula jesoana Cornus controversa Gentiana squarrosa Ranunculus erucilobus Potentilla fragarioides V. sprengeliana Anemone amurensis Magnola sieboldii Hydanges serrata for acuminata Ligularia Fischeri Thymus Quinquccostatus Leontopodium coreana Percentage by month order of blooming April………7% Aug.………10% May………35% Sep.………6% June………21% Oct.………5% July………16% Percentage by flower color White line………52% Violat line………17% red line………18% Yellow line………13% Species of smell flowers Ternstroemia japonica Thymus auinguecotsatus Magnolia sieboldii Melia Aejdarach V. japonica Pittosperum Tobira