• Title/Summary/Keyword: composition change

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Change in Community Structure of Shellfish in the Reclaimed Saemangeum Area (새만금 간척사업에 따른 갯벌 패류의 군집구조 변화)

  • HWANG Sun-Do;KIM Jong-Sheek
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.36 no.6
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    • pp.708-715
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    • 2003
  • Species composition and distribution patterns of shellfish were investigated in Eoeun and Geojeon tidal flat located in the Saemangeum area on the west coast of Korea from May to October 2000. Nineteen species of shellfish were collected in Geojeon tidal flat. The samples in number of individuals included Umbonium thomasi $(90.0\%)$ and Mactra veneriformis $(5.0\%).$ In Eoeun tidal flat, ten species of shellfish were collected and the dominant species in number of individuals were Potamocorbula amurensis $(55.0\%)$ and U. thomasi $(18.6\%).$ These results were compared with previous studies conducted before the beginning of reclamation in Saemangeum. Compared with the results from 1988, a change In species composition was observed. Laternula flexuosa and Nuttallia olivacea appeared, while Mactra chinensis and Coelomactra antiquata disappeared in the deposition area in Geojeon tidal flat. In the erosion area of Eoeun tidal flat, M. veneriformis and Meretrix lusoria appeared, while Cyclina sinensis disappeared. Based on a cluster analysis, the shellfish community in Eoeun tidal flat was classified into three station groups based on sediment types. Geojeon tidal flat was also classified into three station groups. The distribution of shellfish in the Saemangeum area was closely related to the sediment types.

Studies for the osmotic parameter of liposomes

  • Yu, Byung-Sul;Seo, Weon-Gyo;Jeon, Young-Ho
    • Archives of Pharmacal Research
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    • v.10 no.2
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    • pp.94-99
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    • 1987
  • By using the former equation (8), we modified the equation which can show the dissimilar osmotic behavior of liposome with composition change. The slope of the new equation was presented as the ratio of osmotically active volume (V$_{act}$= ) to the total volume (V$_{totel}$= $_{acl}$+ V$_{dead}$ ; V$_{dead}$ is osmotically inactive volume) of loposomes, we defined is as a Z-value, which can elucidate the dissimilarity of the osmotic activity of multilamellar liposomes with the change of phospholipid composition and the differences of physicochemical properties of liposomes. Z-value was applied for studying the physico-chemical properties of liposomal membrane. The factor that affects on the Z-value was not the lipid concentration of liposome stock dispersion but the lipid composition of liposomal membrane. As the content of dicetylphosphate, the negative charged phospholipid, was increased, the osmotic activity, represented by Z-value, of multilamellar liposome was decreased. Using the hypertonic conditions (shrinking region), Z-value steadily increased and reached a maximum at 10 mole percent cholesterol with increasing the cholesterol content.

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A Study on the floor Plan Types and the Space Composition of Multi-used Toilets In Public-Toilets of Choongchung-Do (충청지역 공중화장실 내 다목적화장실의 평면유형과 공간구성에 관한 연구)

  • Kim Eun-Joong
    • Korean Institute of Interior Design Journal
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    • v.15 no.1 s.54
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    • pp.139-146
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    • 2006
  • This study shows the floor plan types and the space composition of multi-used toilets in public-toilets of Choongchung-Do. The areas of multi-used toilets are various from 4.8m2 to 10.5m2 And there Is usually one multi-used toilet in one public-toilet, but some public-toilets have two multi-used toilets. Multi-used toilets have several equipments such as toilet stool, urinal, washstand, change diaper, chair for baby-care, toilet stool for child, urinal for child, so on. All the multi-used toilets have toilet stool and washstand, but urinal and change diaper were used restrictively, and chair for baby-care, toilet stool for child, urinal for child were used in few cases. There are six types how the multi-used toilets are located in public-toilets, five types of multi-used toilet forms, and five types how the equipments are installed in multi-used toilets. The dotted blocks are installed partially in line type, and partially in spot type. But some cases, there was no installation of dotted block. Auto-sliding door were usually applicated, and some other types of door system were used restrictively. This study offers not only the present conditions, but also the appropriate planning directions of the multi-used toilets.

Diet composition of juvenile Korean piscivorous chub, Opsariichthys uncirostris amurensis in the surf zone of Nakdong river estuary, Korea (낙동강 하구역 해빈 쇄파대에서 출현하는 끄리(Opsariichthys uncirostris amurensis) 유어의 위내용물 조성)

  • Baeck, Gun Wook;Huh, Sung Hoi;Park, Joo Myun
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.50 no.3
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    • pp.334-341
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    • 2014
  • The diet composition of juvenile Korean piscivorous chub, Opsariichthys uncirostris amurensis were studied using 277 specimens collected from January to December 2004 in the surf zone of Nakdong river estuary. The size of Opsariichthys uncirostris amurensis ranged from 2.6 to 9.1 cm in standard length (SL). Opsariichthys uncirostris amurensis was carnivore that consumes mainly amphipods and insects. Its diet also included small quantities of polychaetes, fishes, and algae and plants. Opsariichthys uncirostris amurensis showed ontogenetic diet change. Smaller individuals (< 4 cm SL) mainly consumed amphipods. The portion of these prey items decreased with increasing fish size, and this decrease was paralleled with increased consumption of larger preys such as polychaetes and fishes. Insects were preyed moderated values in all size classes. Opsariichthys uncirostris amurensis diet also showed diel change with consuming more on amphipods and polychaetes during day.

Effects of Brazilin on Lipid and Phosphatidyl Fatty Acid Composition of Erythrocyte Membrane in Streptozotocin-induced Diabetic Rats

  • Moon, Change-Kiu;Yoon, Eun-Yi;Lee, Soo-Hwan;Moon, Chang-hyun;Hwang, Daniel-H.
    • Archives of Pharmacal Research
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    • v.16 no.2
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    • pp.147-151
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    • 1993
  • In diabetes, the abnormal increase of the membrane cholesterol/phospholipid ratio (C/PL) is consdered to be the main reason for the decreased membrane fluidity, which then results in impaired erythrocyte deformability and subsequent microcirculatory disturbances. In this study, we examined the effects of brazilin on lipid and phosphatidyl fatty acid composition of erythrocyte membranes in streptozotocin induced diabetic rats. Treatment of brazilin (10mg/kg or 100 mg/kg for 2 weeks, i.p) altered and cholesterol contents in diabetic erythrocyte membranes. The C/PL ratio of brazilin treated groups decreased compared with that of diabetic control group while no change was observed in normal erythrocytes. In streptozotocin induced diabetic rats, alterations in phosphatidyl fatty acid compositioin of erythrocyte membranes were observed and brazilin could reverse these alterations. Arachidonic acid level reumed to a normal level while linoleic acid level remained unchanged by the treatment of brazilin. The results suggest that brazilin might increase erythrocyte membrane fluidity which plays a key role inregulating erythrocyte deformability, thereby it could exert positive effects on microdiculatory disturbances.

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A Study on the Satisfaction of Spatial Composition by Double-income Households Considering their Life Style (맞벌이가족 라이프스타일 유형에 따른 공간구성 만족도에 관한 연구)

  • Lee, Se-Na;Lee, Hyun-Soo
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2006.11a
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    • pp.92-96
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    • 2006
  • With the change of family type and diversify of life style, residents need various unit plan in Quality. A rate of economically productive women has increased, and generally double-income households will continuously increase in the future. So a research is requested to consider the double-income households's satisfaction for a unit plan based on their life characteristics. The purpose of this study is to find out double-income households's lifestyles, and to search and analyze users' needs for spatial composition according to their lifestyles, and then, embody spatial composition of Apartment Unit plans. The findings are as follows. (1) Housing lifestyles of users living in apartment are categorized into 5 types: seeking the way to make housework easy and comfortable, making the best use spatial composition, pursing the universalism, housework oriented, pursing the leisure. (2) The type of seeking the way to make housework easy and comfortable requests facility with home appliances and a shower bath, the type of making the best use spatial composition requests storage space and trial about new plan, the type of pursing the universalism is concerned about the protection of environment and a memorial service, the type of housework oriented wants a talk with their family and discuss some problem, and the type of pursing the leisure requests division of household with their family and likes traveling and sports.

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Effect of DHA and Environmental Enrichment on Brain Fatty Acid Composition and Acetylcholinesterase Activity (식이 DHA와 환경보충이 흰쥐의 뇌지방조성 및 Acetylcholinesterase활성에 미치는 영향)

  • 김문정
    • Journal of Nutrition and Health
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    • v.29 no.1
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    • pp.32-40
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    • 1996
  • To investigate the effect of dietary docosahexaenoic acid(DHA) and environmental enrichment on brain fatty acid composition and acetylcholinesterase(AChE) activity, two groups of was fed isocaloric diets containing 10 or 12% dietary lipids for 7 weeks. A third group was fed 10% (w/w) dietary lipids with supplemented 2% DHA-rich fish oil. Each diet group was housed either in a stainless steel cage individually or in a large enriched cage with toys where 7 rats were kept together. The fatty acid composition of plasma and brain was significantly affected by dietary lipid composition but not by environmental enrichment. Fish oil supplementation significanlty decreased plasma levels of monounsaturated fatty acids(MUFA) and increased polyunsaturated fatty acids(PUFA). Fish oil supplemented groups also maintained lower plasma n-6 fatty acids and higher n-3 fatty acids levels than unsupplemented groups. The fish oil supplementation significantly decreased arachidonic acid and increased eicosapentaenic, docosapentaenoic acids, and DHA in brain fatty acid composition. In addition, brain DHA level in supplemented groups tended higher than the unsupplemented. Brain, AChE activity significantly increased by the environmental enrichment but not by the fish oil supplementation. These finding suggest that the 2% fish oil (0.57% DHA & 0.31% EPA, per diet weigth) supplementation is enough to accumulate n-3 fatty acids and to change the n-6 n-3 ratio in brain and environmental enrichment might promote the learning ability.

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Total Lipid, Total Cholesterol and Fatty Acid Composition in Colostrum from Mothers with Preterm Delivery and Pregnancy Induced Hypertension (조기분만과 임신성 고혈압 산모의 초유내 총지질, 총콜레스테롤 및 지방산 조정)

  • 안홍석
    • Journal of Nutrition and Health
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    • v.33 no.2
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    • pp.186-192
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    • 2000
  • In this study, total lipid and cholesterol contents and fatty acid composition of colostrum milk obtained from 30 normal mothers, 10 mothers who was delivered of preterm infant and 8 pregnancy induced hypertensive mothers were analyzed. While total cholesterol content in preterm colostrum was significantly lower than other groups (p<0.05), total lipid content was not different among three groups, ranged 2.24-.2.2g/dl. Composition of saturated fatty acide, such as lauric acid and myristic acid which are medium chain fatty acids in preterm milk were higher than those of normal-term and hypertensive mother's milk. There was no difference n total composition of polyunsaturated fatty acids and the rationh of $\omega$6/$\omega$3 among 3 group mother's colostrum, ranged 19.45-21.45% and 6.42-7.87, respectively. but the composition of arachidonic acid and DHA in colostrum of hypertensive mothers were significantly higher than those of normal and preterm mothers. These data indicates that gestational length and complications during pregnancy may change the lipid profile and fatty acid composition of hyman milk colosstrum.

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A Dynamic QoS Adjustment Enabled and Load-balancing-aware Service Composition Method for Multiple Requests

  • Wu, Xiaozhu
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.15 no.3
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    • pp.891-910
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    • 2021
  • Previous QoS-aware service composition methods mainly focus on how to generate composite service with the optimal QoS efficiently for a single request. However, in the real application scenarios, there are multiple service requests and multiple service providers. It is more important to compose services with suboptimal QoS and maintain the load balance between services. To solve this problem, in this paper, we propose a service composition method, named as dynamically change and balancing composition method (DCBC). It assumes that the QoS of service is not static, and the services can adjust the value of QoS to gain more opportunities to be selected for composition. The method mainly includes two steps, which are the preprocessing step and the service selection step. In the preprocessing step, a backward global best QoS calculation is performed which regarding the static and dynamic QoS respectively; then guided by the global QoS, the feasible services can be selected efficiently in the service selection step. The experiments show that the DCBC method can not only improve the overall quality of composite services but also guarantee the fulfill ratio of requests and the load balance of services.

A Study on The Composition and Characteristics of WaIls through Visual Configuration Analyses - Focusing on the Exhibition Space for Paintings - (시각구조분석을 통한 벽의 구성과 특성에 관한 연구 -회화위주 전시공간을 대상으로-)

  • Lee, Jong-Sook;Park, Jong-Won
    • Journal of The Korean Digital Architecture Interior Association
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    • v.8 no.2
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    • pp.57-64
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    • 2008
  • The walls of art museums become the background of exhibits, and they form a unit space depending on the of each exhibit. In addition, the walls are configured and presented depending on the rhythm of space, or the structure of an axis. In this study, according to the axis composed for each unit space, the presentation methods of walls were classified as follows: The central type, the skewed type, the crossed type, the one-side corridor type, and the two-way corridor type. By analyzing visual configurations formed by the arrangement of each unit space, the value and the hierarchy of walls are discussed To analyze the classified types with the physical change of unit space, the factors of visual integration, connectivity, depth, and visual axis are compared, and various configurations of walls and space change are applied.

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