• The korean journal of orthodontics
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• v.29 no.2 s.73
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• pp.183-195
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• 1999

Growth and development evaluation of patients with growth potential is of great importance for orthodontic treatment planning. Timing of orthodontic intervention greatly depends on one's developmental status, thus if there is a difference in skeletal maturation among malocclusion types different treatment timing should be applied. The objective of this study was to evaluate and compare skeletal maturation among different malocclusion types. The samples used in this study was 38 Class I, 36 Class II and 33 ClassIII females aging from 8 to 10 years. Handwrist X-rays were taken with 6 month interval till 12-13 years of age. The results were as follows. 1. There was no skeletal maturity difference among different malocclusion types. 2. The hamular process of hamate was observed at $9.16{\pm}0.72$ years, pisiform bone at $9.13{\pm}0.71$ years and the ulnar sesamoid at $10.34{\pm}0.84$ years. 3. The timing of epiphyseal capping on the third finger was $10.96{\pm}0.80$ years for distal phalanx and $11.27{\pm}0.87$ years for middle phalanx, $11.12{\pm}0.85$ years for proximal phalanx of the first finger, $11.21{\pm}0.82$ years for radius and $11.62{\pm}0.85$ years for middle phalanx of the fifth finger. 4. The appearance of pisiform bone showed high correlation with appearance of hamular process of hamate(r=0.91) and ulnar sesamoid bone appearance showed high correlation with advanced ossification of hamular process(r=0.86). Timing of epiphyseal capping among different parts showed high correlation(r=0.80-0.90). 5. The shape of middle phalanx of the fifth finger showed the highest variability ($20.6\%$).

• Journal of the Ergonomics Society of Korea
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• v.17 no.3
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• pp.91-101
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• 1998

Anthropometric characteristics and considerations of sex differences are essential for the correct design of ergonomic work spaces. This paper is concerned with longitudinal study on the physical growth in the Korean youth. Five hundred and fourty subjects were selected from third year students of high schools, and their records on physical examination during the last twelve years were surveyed by longitudinal method. This study investigated the anthropometric characteristics of physical structure and the shape of physical growth for boys and girls. The result showed that there were significant sex differences in the pattern of physical growth in height.

• The Journal of the Korean dental association
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• v.12 no.4
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• pp.269-273
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• 1974

This present investigation was concerned with the content of ash, Mg, Ca, K and N'a of bone, cartilage, incisor teeth and molar teeth in rats of different weights. The results obtained were summarized as follows. 1. Cartilage is the most adequate model for the study in vivo of mechanisms concerned with normal calcification. 2. The percentage of inorganic material in cartilage rose from approx 13% of the dry weight in 5g rat to 46% in the tissue from rats weighing 134g 3. There was no marked change in the content of ash, Ca, Mg, K and Na after eruptions due to the increasing weight.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.126-127
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• 2001

칼슘은 인체의 필수 원소로서 뼈나 치아의 조직에 강도를 부여하는 신체 지지기능 이외에 체액의 pH를 약 알칼리성으로 유지시켜 장관으로부터 흡수한 영양소를 각 세포에 부드럽게 전달하여 세포 및 효소의 활성화에 의한 근육의 수축, 혈액 응고 및 여러 가지 심혈관계 질환의 예방에 관여하는 기능을 한다. 따라서, 칼슘의 흡수가 부족한 경우에는 뼈나 치아의 발육이 나쁘게 되어 성장이 늦고, 피로를 쉽게 느끼며, 고혈압, 심장병 및 뇌졸증 등의 성인병 및 골다공증의 원인이 된다. (중략)

• Microbiology and Biotechnology Letters
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• v.13 no.1
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• pp.41-49
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• 1985

Bacillus sphaericus was mutagenized with UV light irradiation and dimethyl sulfate. Thirty-five conditional lethal temperature-sensitive(ts) mutants were isolated at the nonpermissive temperature of $42^{\circ}C$ and classified into three groups by their growth characteristics on the nutrient broth, peptone glucose yeast extract agar and mineral salts agar. First was the lethal ts group, 24 mutants, which did not grow at the nonpermissive temperature, the second, 9 mutants, was the less growth is group whose growth was restricted to one-half, and the third, 2 mutants, was the cold lethal ts group whose growth was restricted at the permissive temperature($25^{\circ}C$and $30^{\circ}C$)

• Korean Journal of Fisheries and Aquatic Sciences
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• v.28 no.4
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• pp.401-411
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• 1995

Flavobacterium spp., Pseudomonas spp., and Vibrio spp. were isolated from samples(sediments) of Sagami Bay and Suruga Bay(in Japan) at 810-4,000m in depth. Among isolated strains, Vibvio sp.-86 and sp.-87 strains were identified as barophilic and psychrophilic ones. They grew in 400 atm and showed best growth at 100 atm. Marine bacteria grown at 400 atm were long rod shape and 30 to 50times longer than those grown at 1 atm. which were short rod shape and formed flocks (aggregates). Vibrio sp,-86 strain grew at $5-37^{\circ}C\;and\;0,5-9.0\%\;NaCl\;(3.0\%\;of\;optimum\;concentration),$ while Vibrio sp.-87 strain grew at $1-7\%\;NaCl\;(2,0\%\;of\;optimum\;concentration).$ The fatty acid compositions of Vibrio sp.-86 strain grown at 1 atm were $C_{20}-C_{22:0},\;C_{l6:1},\;and\;C_{16:0}$ in the order of their abundance and at 400 atm the order were $C_{18:1},\;C_{18:0},\;and\;C_{20}-C_{22}$, whereas those of Vibrio sp.-87 strain at 1 atm were $C_{6:1},\;C_{14:1},\;and\;C_{20}-C_{22}$ and at 400 atm the order were $C_{14:1},\;C_{12:0},\;and\;C_{16:1}$ The amino acids compositon of Vibrio sp.-86 strain grown at 1 atm were abundant in the order of aspartic acid, methionine, and glutamic acid and those at 400 atm were abundant in the order of methionine, glutamic acid, and aspartic acid. The amino acids composition of Vibrio sp.-87 strain grwon at 1 atm were abundant in the order of methionine, glutamic acid, and aspartic acid and those at 400 atm were abundant in the order of methionine, glutamic acid, and isoleucine.

• The korean journal of orthodontics
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• v.28 no.2 s.67
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• pp.285-295
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• 1998

In clinical orthodontics, it is significant to understand the stage of growth in a growing patient. In order to assess the skeletal maturity of the patients, the hand-wrist radiograph and the cervical vertebrae (Cervical Vertebrae Maturation Indicators : CVMI) was evaluated from the lateral cephalograph and the skeletal maturity determined from the hand-wrist X-ray (Skeletal Maurity Indicators : SMI) taken on the same day in the same patients, and its interrelationship examined to come up with the following results: 1. The skeletal maturity evaluated from the hand-wrist radiograph and the maturation of the cervical vertebrae from the lateral cephalograph showed a significant interrelationship with each other. 2. In the evaluation of the skeletal maturity using the SMI and CVMI, the CVMI 1 showed a siginificant correlation with SMI 1, 2, the CVMI 2 with SMI 3, 4, CVMI 3 with SMI 6, 7, CVMI 4 with SMI 7, 8, CVMI 5 with 9, 10 and CVMI 6 with SMI 11. 3. When the morphological changes in the 2nd and 3rd cervical vertebrae were separately observed, it was seldom that the concavity appeared in the lower border of the 2nd cervical vertebra and at the same time not appear in the 3rd cervical vertebra (CVMI 2 : 10.38%, CVMI 3 : 6.56%) 4. In each of the skeletal maturation stage evaluated from the hand-wrist and the cervical vertebra, the average age and its standard deviation in male and female patients appeared to have large differences among individuals. Skeletal maturation seemed to appear earlier for the girls than for the boys, and its termination 24 months faster for girls.

• Journal of Animal Science and Technology
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• v.44 no.5
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• pp.531-540
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• 2002

This study was conducted to examine the effect of Hwangto, Illite, and any other disease resistant materials as dietary supplements on the growth performance and immunity for growing period with 30 Hanwoo male calves weaned 75days in age. Feeding trial was conducted with 6 treatments(five heads/treatment), which were T1(Control), T2(Control + 2% Hwangto), T3(Control + 2% Illite), T4(Control + 0.04% Oligosacharides), T5(Control + 2% Charcoal powder) and T6(Control + 0.1% Chromium picolinate) for 120 days from three to seven months in age. The results obtained are summarized as follows; During the experimental period, average daily gains were 0.82 to 0.92kg, and were high in the order of T3, T6, T4, T5, T2 and T1. Especially the growth rate of calves for growing period was higher in Illite, chromium-picolinate and oligo- sacharides feeding groups than in any other groups. Average daily intakes and intake ratio to body weight of concentrates for 120days were 3.91 to 4.15kg(average 4.03kg) and 3.10 to 3.31% (average 3.21%), respectively. TDN intakes per kilogram gains were 3.20 to 3.57kg(average 3.35kg) and were smaller in the order of T5, T3, T6, T4, T2 and T1, respectively. Density of IgG in serum of calves measured by the IgG SDID Kit was 10.2 to 11.6mg/$m\ell$, and especially increase rate of IgG for experimental period was high in T3 and T5 by 6.9 and 2.8%, respectively. But incidence of disease was not found to be different by treatments. According to the above results it may be concluded that Illite is a sort of clay minerals increased the growth rate, feed efficiency and immunity of early weaned calves for growing period, but was not in unprocessed Hwangto.

• Korean Journal of Animal Reproduction
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• v.18 no.4
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• pp.257-263
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• 1995

소 체외수정란의 체외배양 체계는 현재 완전히 확립되지는 않은 상태로서 8∼16 세포기 발육억제현상, 수정란의 파편하 현상, 성장지연 등 여러 가지 문제점들이 현 배양체계에서 나타난다. 그러나 hepler cell들과의 공배양에 의해 이러한 문제점들은 상당히 극복되며 또한 체외발생의 촉진 및 공배양된 수정란의 이식에 의해 임신율도 향상된다. 현재 소 체외수정란의 공배양에는 난관상피세포가 가장 널리 이용되나 이러한 시스템은 몇가지 문제점이 있다. 즉, primary culture를 확보하기 위하여 신선한 조직을 주기적으로 채취해야 하며 따라서 난관채취에 시간이 소요되고, 불편하며 또한 공배양에 이용되는 세포들이 균일하지 않은바 난관상피세포에 따라 배 발생 촉진작용에 변이를 나타내기도 한다. 그러나 확립된 cell line을 이용할 수 있다면 이러한 난관상피세포의 이용에서 나타나는 문제점들이 해결될 수 있다. Buffalo Rat Liver cell은 이러한 목적에 이용될 수 있는 cell line 중의 하나로서 이들은 여러 가지 성장인자(growth factor)를 분비하는 것으로 알려져 있다. 따라서 본고에서는 소 체외수정란의 공배양을 위한 BRL(Buffalo Rat Liver)cell의 이용성, 이용방법 및 이용에 있어서 고려하여야 할 요인들에 대하여 살펴보고자 한다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.499-501
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• 2000

굴을 포함한 대부분의 해양 무척추동물들은 동일종이라도 먹이조건과 온도조건에 의해 성장과 발육, 번식초기연령이나 최소번식 크기 등에 큰 차이를 보인다. 굴의 번식수단 및 생활사 를 이해하기 위해서는 번식이나 생활사에 관한 속성을 보다 수량적으로 확인하고 동시에 개체군 생태학적인 지견을 가질 필요가 있다 (윤, 1996). 대서양산 굴, Crassostre virginica에 대하여 Lee and Heffernan (1991)은 알의 지질과 단백질 조성을 밝히고 생화학적 특성을 보고하였으며, Choi et al. (1993)는 면역학적 방법을 이용하여 번식량에 대한 정량적인 연구를 보고한 바 있으나, 이와는 대조적으로 참굴 C. gigas의 알 및 번식량에 대한 연구는 미비한 실정이다. (중략)