• Title/Summary/Keyword: Growth & development

Search Result 12,681, Processing Time 0.052 seconds

Growth characteristics of halophytes and forage crops under salt concentrations

  • Jeong, Jae-Hyeok;Hwang, Woon-Ha;An, Sung-Hyun;Jeong, Han-Yong;Lee, Hyeon-Seok;Baek, Jung-Sun;Choi, Kyung-Jin;Lee, Geon-Hwi;Chung, Nam-Jin;Yun, Song Joong
    • Proceedings of the Korean Society of Crop Science Conference
    • /
    • 2017.06a
    • /
    • pp.355-355
    • /
    • 2017
  • South Korea is largely dependent on imports of forage crops. In order to raise the self-sufficiency rate of forage crops, it is necessary to cultivate forage crops in 135,100 ha reclaimed land of South Korea. This study was conducted to investigate the growth of halophytes and forage crops in order to search for stable plants on reclaimed land. The plants were cultured in Hoagland solution and grown at 0%, 0.5%, 1.0% and 2.0% of salt concentrations. Plants with good growth at 0.5% of salt concentration were halophytes such as Suaeda asparagoides and Salsola komarovii. Salicornia herbacea and Suaeda maritima showed good growth at 2.0% salinity, and Suaeda maritima showed stable growth at all of salt concentrations. In conclusion, Suaeda asparagoides showed the best growth at 0.5% of salt concentration and was considered the most biomass at reclaimed land in Korea with less than 0.5% of salt concentration.

  • PDF

Post-discharge Nutrition (미숙아의 퇴원 후 영양)

  • Kim, Ee-Kyung
    • Neonatal Medicine
    • /
    • v.16 no.2
    • /
    • pp.131-136
    • /
    • 2009
  • Preterm infants are frequently discharged from the hospital with growth retardation. Given the potentially lifelong effects of growth impairmnet during a critical time of development, considerable effort should be focused on improving growth after discharge. Growth monitoring must be based on regular measurements of weight, length, and head circumference to identify those preterm infants with poor growth that may need additional nutritional support. Although prior studies vary in design and the intervention used, the evidence supports the use of fortified formulas in formula-fed preterm infants after discharge. The situation for infants fed human milk is much less clear, it seems prudent to concentrate our efforts on the encouragement of breast-feeding in this population. Catch up growth may have many benefits, and may lead to improved development. However, its long-term metabolic consequences are currently unclear. Understanding the optimal means of providing nutrition after discharge is an ongoing process.

Protein variation and involvement of insulin-like growth factor during embryonic development in the olive flounder Paralichthys olivaceus

  • Kim, Kang-Woong;Nam, Taek Jeong;Choi, Youn Hee
    • Fisheries and Aquatic Sciences
    • /
    • v.21 no.2
    • /
    • pp.4.1-4.5
    • /
    • 2018
  • Insulin-like growth factors (IGFs), along with IGF-binding protein and IGF receptor, are well-known regulators in the growth and survival of vertebrates. In this study, we investigated the involvement of IGFs and protein variation during embryonic development of the olive flounder (Paralichthys olivaceus). Morphological stages were divided into six main developments as blastula, gastrula, cephalization, cranial regionalization, tail lift, and hatch. During embryonic development, protein variation was investigated using sodium dodecyl sulfate-polyacrylamide gel electrophoresis and electrospray ionization quadrupole time-of-flight mass spectrometry/mass spectrometry. In addition, the mechanism of signaling of IGF-I receptor was examined using immuno-blot analysis. We found marked changes in protein expression at four stages of embryonic development and identified proteins as belonging to the vitellogenin 2 family. As development progresses, expression of IGF-II, phosphotyrosine, and phospho-Akt increased, while expression of growth factor receptor-bound protein 2 (GRB2) and one of guanine-nucleotide-binding proteins (Ras) decreased. These results provide basic information on the IGF system in the embryonic development of the olive flounder.

Growth-Promoting Effects of Vegetable Extracts on Selected Human Lactic Acid Bacteria

  • Kim, Moo-Key;Kim, Byung-Su;Baek, Bong-Rea;Shin, Dong-Hwa;Lee, Hoi-Seon
    • Preventive Nutrition and Food Science
    • /
    • v.6 no.3
    • /
    • pp.192-196
    • /
    • 2001
  • Ethanol extracts from 36 vegetable samples were assayed for their growth-promoting effects on Bifidobacterium bifidum, B. longum, and Lactobacillus casei The growth-promoting effects varied according to bacterial strain and vegetable species. In modified Gy rgy broth, extracts of Lactuca sativa, Lycopersicon esculentum and L escutentum var. cerasiforme exhibited strong growth-promoting responses toward B. longum, and significant and strong growth- promoting response toward B. bifidum was observed in extracts of Actinidia arguta, Allium cepa, A. sativum, Brassica campestris subsp. napus vats. pekinensis, Capsicum frutescens, Daucus carota var. sativa, L sativa, 1. esculentum and L. esculentum var. cerasforme, Nelumbo nucifera, Cucurbita moschata, Lackca sativa var. capitata, and Rubus coreanus. For L casei, extracts of A. fshlosum, A. hberosum, Cichorium intbus, Cucurbita moschat\ulcorner Ipomoea batatas, 1. sativa var. capitata, L. esculentum, P. brachycarpa, Raphanus sativus, R. coreanus, and S. melongena strongly enhanced the growth of this bacteria. In modified Gy rgy broth, the promoting effect was most pronounced with B. bifidum and L. casei among lactic acid bacteria used. In MRS broth, A. arguta, A. cepa, A. sativum, B. campestris subsp. napus var. pekinensis, C. frutescens, and D. carota var. sativa L. satiw var. capitata, and R. coreanus strongly enhanced the growth of B. bifidum, Growth of B. longum was strongly affected by the addition of extracts from L. sativa var. capitata. For L casei, moderate growth-promoting responses were observed in 9 vegetable extracts. The promoting effect in MRS broth was most pronounced with B. bifidum among lactic acid bacteria used.

  • PDF

Growth Responses of seven Intestinal Bacteria Against Phellodendron amurense Root-Derived Materials

  • Kim, Min-Jeong;Lee, Sang-Hyun;Cho, Jang-Hee;Kim, Moo-Key;Lee, Hoi-Seon
    • Journal of Microbiology and Biotechnology
    • /
    • v.13 no.4
    • /
    • pp.522-528
    • /
    • 2003
  • The growth responses of Phellodendron amurense root-derived materials against seven intestinal bacteria were examined, using an impregnated paper disk agar diffusion method and spectrometric method under $O_2$-free condition. The biologically active constituent of the P. amurense root extract was characterized as berberine chloride ($C_{20}H_{18}NO_{41}Cl$) using various spectroscopic analyses. The growth responses varied depending on the bacterial strain, chemicals, and dose tested. At 1 mg/disk, berberine chloride strongly inhibited the growth of Clostridium perfringens, and moderately inhibited the growth of Escherichia coli and Streptococcus mutans without any adverse effects on the growth of three lactic acid-bacteria (Bifidobacterium bifidum, B. longum, and Lactobacillus acidophilus). The structure-activity relationship revealed that berberine chloride exhibited more growth-inhibiting activity against C. perfringens, E. coli, and S. mutans than berberine iodide and berberine sulfate. These results, therefore, indicate that the growth-inhibiting activity of the three berberines was much more pronounced as chloridated analogue than iodided and sulphated analogues. As for the morphological effect caused by 1 mg/disk of berberine chloride, most strains of C. perfringens were damaged and killed, indicating that berberine chloride showed a strong inhibition against C. perfringens. As naturally occurring growth-inhibiting agents, the P. amurense root-derived materials described could be useful as a preventive agent against diseases caused by harmful intestinal bacteria such as clostridia.

An Estimation on Development Capacity under Urban Growth Management Policies: A Case of Maryland in the U.S. (도시성장관리정책 하에서의 개발용량 추정과 정책적 함의: 미국 매릴랜드 주를 사례로)

  • Sohn, Jung-Yul;Knaap, Gerrit
    • Journal of the Korean Geographical Society
    • /
    • v.43 no.1
    • /
    • pp.52-70
    • /
    • 2008
  • Using MD Property View database on 15 counties in Maryland in the U.S., this study attempts to explore the estimation process on the housing development capacity under the Maryland's urban growth management policy known as the Smart Growth Initiatives. This study also seeks to draw the implications of the estimated development capacity by individual counties on successful implementation of the urban growth management policy. The finding shows that this region has land for residential use enough to accommodate growth for the next 30 years. However, contrary to the goal of the Smart Growth Initiatives, a majority of development capacity is located not only outside the Priority Funding Area designated by the Smart Growth Initiatives but also at counties that are located far away from the major metropolitan area. In addressing this problem, the state does not need to either abolish or immediately expand the Priority Funding Area. Rather, the state requires local governments to include housing elements in their comprehensive planning, to provide periodic estimates on housing and employment capacity, and to establish and manage database on the location and the capacity of developable land.

A Study on the Growth Prospect and Development Direction of Donghae City as Port City (항구도시로서 동해시의 성장전망과 개발방향에 관한 연구)

  • Choi, Jang-Soon
    • Journal of the Korean Institute of Rural Architecture
    • /
    • v.8 no.1
    • /
    • pp.70-79
    • /
    • 2006
  • This study deals with analysing the growth prospect and development direction of Donghae city with two international ports. To do so, it is progressed, firstly, to examine the general discovery about port since the late nineteenth century, secondly, to unfold it's theory with Mukho and Donghae port as Donghae city development element as the central figure, thirdly, to analyse Donghae city as the important place of traffic, the location of industry and the resource base in a spatial planning side.

  • PDF

Practical Application of Reliability Growth in Automotive New Product Cycle (자동차 개발에 있어서 심리팽창이론의 적용방법)

  • Jung, Won
    • IE interfaces
    • /
    • v.12 no.1
    • /
    • pp.158-165
    • /
    • 1999
  • One solution to the estimation of product reliability during the development phase is to measure reliability improvement over time and compare this improvement to previous product development progress. This paper presents the reliability growth theory and applies it to some subsystems of vehicles during their design, development and prototype testing. The data presented illustrates explicitly the prediction of the reliability growth in the product development cycle. The application of these techniques is a part of the product assurance function that plays an important role in product reliability improvement.

  • PDF

Inclusive Innovation and Growth Based on a National Innovation System: Experience from China

  • Junfang, Zhang;Rong, Guo;Wei, Zhou
    • STI Policy Review
    • /
    • v.3 no.2
    • /
    • pp.66-78
    • /
    • 2012
  • China is becoming a global hot topic because of its rapid economic growth. However, the country show signs of not meeting the expectation of retaining its long-term industrial competitiveness and economic growth, especially with a widening rich-poor gap and natural resource exhaustion. Realizing inclusive growth requires study of an inclusive innovation solution. In this paper, we analyze the feasibility and development path of China's inclusive innovation based on the framework of a National Innovation System, identify examples of inclusive innovation in China, and seek to provide policy suggestions for China's future sustainable development.

Models Describing Growth Characteristics of Holstein Dairy Cows Raised in Korea

  • Vijayakumar, Mayakrishnan;Choy, Yun-Ho;Kim, Tae-Il;Lim, Dong-Hyun;Park, Seong-Min;Alam, Mahboob;Choi, Hee-Chul;Ki, Kwang-Seok;Lee, Hyun-Jeong
    • Journal of The Korean Society of Grassland and Forage Science
    • /
    • v.40 no.3
    • /
    • pp.167-176
    • /
    • 2020
  • The objective of the present study was to determine the best model to describe and quantify the changes in live body weight, height at withers, height at rump, body length and chest girth of Holstein cows raised under Korean feeding conditions for 50 months. The five standard growth models namely polynomial linear regression models, regression of growth variables on the first and second-order of ages in days (model 1) and regression of growth variables on age covariates from first to the third-order (model 2) as well as non-linear models were fitted and evaluated for representing growth pattern of Holstein cows raised in Korean feeding circumstances. Nonlinear models fitted were three exponential growth curve models; Brody, Gompertz, and von Bertalanffy functional models. For this purpose, a total of 22 Holstein cows raised in Korea used in the period from April 2016 to May 2020. Each model fitted to monthly growth curve records of dairy cows by using PROC NLIN procedure in SAS program. On the basis of the results, nonlinear models showed the lower root mean square of error (RMSE) for live body weight, height at withers, height at rump, body length and chest girth (12.22, 1.95, 1.55, 4.04, 2.06) with higher correlation coefficiency (R2) values for live body weight, height at withers, height at rump, body length and chest girth (0.99, 0.99, 0.99, 1.00, 1.00). Overall, the evaluation of the different growth models indicated that the Gompertz model used in the study seemed to be the most appropriate one for standard growth of Holstein cows raised under Korean feeding system.