• Korean Journal of Environment and Ecology
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• v.28 no.3
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• pp.281-286
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• 2014

This study was conducted to investigate the individual size and age of Kaloula borealis, a pair in amplexus. In June 2013, the total 23 pairs of Kaloula borealis were captured in the wetland located in Seongsan-eup and Daejeong-eup, Jeju Island. Size and age of each individual have been examined and as a result of analyzing SVL (snout-vent length), weight, length of forelimb and hindlimb of the collected 23 pairs, the females were shown to have the heavier weight and the longer SVL and hindlimb compared to males. No significant difference in the length of forelimb has been found between the female and the male. The average age of the male of the pair in amplexus was shown to be $5.17{\pm}0.26$, whereas the female was shown to be $6.22{\pm}0.28$, which indicates the higher average age in female compared to the male. The age range of Kaloula borealis was distributed from at least 3 years to 10 years at the maximum. A positive correlation was shown between age of the male and SVL; however, no significant difference was found in female. This study result expected to be utilized as an important base data in establishing the preservation and restoration strategy of endangered species, Kaloula borealis.

• Development and Reproduction
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• v.16 no.2
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• pp.113-120
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• 2012

We examined the distribution of uterine mast cells in cycling mice of different ages between 7 weeks and 38 weeks by toluidine blue staining. Mast cell density increased gradually depending on the age and culminated at 30 weeks after birth. Of the estrous stages, uteruses at metestrus showed markedly higher density of mast cells than those at the other stages in cycling mice of all ages analysed in this study and the majority of the mast cells were found in myometrium. We also discriminated types of the uterine mast cells in cycling mice at 10 weeks old by Alcian blue-safranin double staining. Mucosal type was most abundant among three types, including connective-tissue types and mixed types, through the entire estrous cycles. The portion of mixed types increased slightly after estrous. The abundance of uterine collagen protein determined by Masson trichrome staining was exactly consistent with the density distribution of the uterine mast cells during estrous cycles. Taken together, these results may imply that uterine mucosal mast cells, together with collagen proteins, are heavily involved in tissue remodeling of cycling mouse uterus.

• Journal of the Korean Geographical Society
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• v.46 no.4
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• pp.480-500
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• 2011

This paper aims to describe the rapid growth of the one-person households in terms of the socio-economic demographic perspectives during the period of 1995-2005 and to analyze the spatial distribution patterns based on different characteristics of one-person households. The increase in the divorce ratio in the middle-aged, the growth of unmarried people the young generation, and the increase of life expectancy in the old generation are explanatory factors for the rise and diversification of one-person households in Korea. The rapid increase of one-person households is accompanied by a diversification in their age, gender, marital status, education level. Uneven distribution of one-person households depends on their age, level of education and dwelling type. Highly educated young adults residing in their own apartment are generally concentrated in major cities, whereas senior citizen with their own single house who lives alone are mostly in rural area. One-person households of the highly educated young adults are significantly polarized in the light of their the living standards. In particular, metropolitan area or big cities are mixed with those who have their own apartment and are financially capacity and with those who rent in a detached single house. As such, one-person households have considerably heterogeneous characteristics. Therefore, each local government will face different economic and social problems based on which group of one-person households are increasing and where they are concentrated in. To this extent, the local government should have differentiated welfare policy according to its own respect.

• Korean Journal of Ichthyology
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• v.33 no.3
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• pp.177-183
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• 2021

Distribution aspects and extinction threat evaluation of the endangered species, Rhynchocypris semotilus were investigated in Goseong-gun, Gangwon-do, Korea, June 2020. Among the 12 sampling sites investigated during the study period, samples of R. semotilus were collected 268 individuals at 6 sites. The streams inhabited of R. semotilus were Songhyeoncheon (3 stations), Gojindong (2 stations) and Osodong (1 station). The main habitats of R. semotilus were uppermost and upper stream (Aa type) with 3~15 m water flow width, 0.3~1.3 m depth and high ratio boulder and cobble bottoms. The estimated age of the R. semotilus (June) based on their total length distribution indicated that 0-, 1-, 2-, 3- and more than 4-year-old were 6~27 mm, 38~59 mm, 60~75 mm, 78~93 mm and 96~125 mm, respectively, and their has matured reproductive organs over two years old. R. semotilus investigation results of the threat of extinction showed no tendency to decrease in population size, but estimated to be less than 1,000 mature individuals, with a small range of extend of occurrence (39.668 km²), area of occupancy (16 km²), and number of disconnected locations (3 locations). Therefore, R. semotilus is now considered vulnerable (VU D2) based on the IUCN Red List categories and criteria.

• Radiation Oncology Journal
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• v.17 no.2
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• pp.158-165
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• 1999

Purpose : To investigate the percentage of colonies wi1h16or more cells distribution of human skin fibroblast according to in vitro aging, and to evaluate the relationship between percentage of colonies with 10 or more cells and in vivo donor age in human skin fibroblast culture. Material and Method : C1, C2, C3a, and C3b human skin fibroblast samples from three breast cancer patients were used as subjects. The C1, C2, and C3a donor were 44, 54, and 55 years old, respectively. C3a and C3b cells were isolated from the same person. Single cell suspension of skin fibroblasts was prepared with primary explant technique. One hundred cells are plated into 100m1 tissue culture flask and cultured for two weeks. The colony size was defined as colonies with 16 or more cells. The cultured cell was stained with crystal violet, and number of cells in each colony was determined with stereo microscope at $\times$10 magnification. Passage number of C1, C2, C3a and C3b skin fibroblast were 12th, 17th, and 14th, respectively. Results : Percentage of colonies with 16 or more cells of skin fibroblast samples decreased with increasing in vitro passage number. In contrast, cumulative population doublings of skin fibroblast sample increased with increasing in vitro passage number. Percentage of colonies with 16 or more cells also decreased with increasing population doublings in human skin fibroblast culture. There was strong correlation with percentage of colonies with 16 or more cells and population doublings En C3a skin fibroblast sampie. At the same point of population doublings, the percentage of colonies with 16 or more cells of the young C1 donor was higher level than the old C3a donor. Conclusion : The population doublings increased with increasing in vitro passage number but percentage of colonies with 16 or more cells decreased. The results of this study imply that percentage of colonies with 16 or more cell is useful as a indicator of in vitro human skin fibroblast aging and may estimate the in vivo donor age.

• The Korean Journal of Food And Nutrition
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• v.14 no.5
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• pp.430-440
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• 2001

This study was conducted for 474 adult females in Seoul and Kyunggido area to investigate salt intake and related factors influencing salty food. The results of this study are summerized as follows : The mean blood pressure of subjects was 115.8mmHg/77.5mmHg (systolic/diastolic) and the sodium intake by food frequency method was 4447.6 ${\pm}$ 720.4mg. The mean values for height, weight, and BMI of subjects were 160.0${\pm}$4.5cm, 54.5${\pm}$6.8kg and 21.3${\pm}$2.7, respectively. Preferenence of the saltness of food was positively correlated with sodium intake(p<0.05) a]10 frequency of using table salt or soy sauce(p<0.01) . As age increases, food habit was improved. With respect to attitude toward consuming salty food, young women group responded more positively on the items of adventages of consuming salty food and less negatively on the items of disadventages. Age was positively correlated with weight, BMI and blood pressure but negatively correlated with sodium intake and preferenence of the saltness of food.

• Proceedings of the Costume Culture Conference
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• 2003.09a
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• pp.126-127
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• 2003

본 연구는 중국 성인 여성을 대상으로 드롭 치수로 체형을 분류하고, 각 거주지역(북경ㆍ상해), 연령대(20대ㆍ30대ㆍ40대)별 분포도를 비교, 고찰함으로써 각 집단의 체형의 차이점을 파악하고자 한다. 이는 중국 성인 여성의 체형에 관한 구체적인 정보를 제공할 것이며 또한 중국 여성용 의류 상품의 치수 개발과 맞음새 향상을 위한 기초 자료로 중국 내수 시장 진출에 도움을 줄 것이다. (중략)

• Korean Journal of Veterinary Research
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• v.29 no.4
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• pp.475-478
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• 1989

돼지로 부터 분리한 Staphylococcus hyicus subsp hyicus 489주의 혈청형을 자가생산한 인자혈청을 이용한 평판응집반응으로 동정하였다. 분리균의 혈청형은 A(16.8%), C(20.4%), D(9.4%), E(7.2%), F 형(29.2%) 및 미분류형(17.0%)으로 동정되었으며, 돼지의 건강상태, 신체부위 및 연령에 관계없이 F형의 분포가 가장 높았다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.233-234
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• 2000

돌가자미, Kareius bicoloratus (Basilewsky) 는 가자미목 가자미과에 속하는 어류이며, 한국, 일본, 중국 연안에 서식한다 (Chyung, 1977). 본 종에 대해서는 한국에서 초기생활사에 대한 연구와 난 발생에 대한 연구만 되어있다 (Jun et al, 1999; Moon, 1997). 그 외에 외국에서 연령형질, 성장, 성숙과 산란, 난치자어, 자원관리 등에 관하여 많은 연구가 보고되어 있다 (Hatanaka et al. 1952; Kimoto et al. 1991; Masaki et al, 1986; Mori et al, 1986; Uehara and Shimizu, 1996). (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.235-236
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• 2000

돌가자미, Kareius bicoloratus(Basilewsky)는 가자미목 (Order Pleuronectiformes) 가자미과(Family Pleuronectidae)에 속하는 어류이며, 한국, 일본, 중국 연안에 서식한다 (Chyung, 1977; Kim et al., 1994). 본 종에 대해서는 국외에서는 연령형질, 성장, 성숙과 산란, 난치자어, 자원관리 등에 관한 많은 연구가 되어 있으나, 국내에서는 Moon (1997)의 초기생활사에 대한 연구와 Jun et al. (1999)의 난 발생에 대한 연구만 되어 있을 뿐이다. (중략)