• Title/Summary/Keyword: Growth

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Studies on Food Components and Food Additives Affecting the Growth Patterns of Helicobacter pylori (Helicobacter pylori의 생육에 영향을 미치는 성분과 식품첨가물에 관한 연구)

  • 정혜진
    • The Korean Journal of Food And Nutrition
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    • v.12 no.5
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    • pp.470-477
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    • 1999
  • The purpose of this study was to choose prinicipal food components contained in diet foods and food additives used for manufacturing processed foods and elucidate their in vivo effects on the growth pattern of Helicobacter pylori. To do this the antibacterial effects of various sources of carbon nitrogen and mineral as an effect agent on Helicobacter pylori were first assessed based upon bacterial growth degree. results show that the source of carbon tested had different effects on bacterial growth of Helicobacter pylori. It was revealed that a promotional effect of monosaccharides resulted in enhanced growth of Helicobacter pylori compared with disaccharides and polysacchrides, in particular glucose was observed to be most effective in growth of Helicobacter pylori among monosaccharides teste whereas mannose to hinder the growth of Helicobacter pylori. Polyols such as sorbitol mannitol maltitol and xylitol was however observed to show no promotion or suppression effect on growth of Helicobacter pylori. Apart from these the sources of amino acid and inorganic nitrogen were chosen and tested to assess the promotion or suppression effect of nitrogen sources on growth of helicobacter pylori. It was found that amino acid such as lysine showed its promotion effect on the growth of Helicobacter pylori while arginine (NH4)2SO4 and NH4Cl showed no effect on its growth. Ammoia and urea were however observed to have a positive effect on the growth of Helicobacter pylori. Among these effect agents lysine and methionine were revealed to show the most positive effect on growth of Helicobacter pylori. Minerals such as MgSO4 KH2PO4 and MgCl2 appered to exert their positive growth effects whereas CaCl2 and CaSo4 had a little effect. In addition FeSO4 FeCl2 and FeCl3 brought suppression on the growth of helicobacter pylori. In studies of the growth of Helicobacter pylori by food additives ascorbic acid showed extreme suppression on its growth,. Sodium nitrate and sodium chloride were also found to be of negative effect on the growth of Helicobacter pylori in rder of degree whereas tocopherol had nothing to do with microbial growth.

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Crystal growth from melt in combined heater-magnet modules

  • Rudolph, P.;Czupalla, M.;Dropka, N.;Frank-Rotsch, Ch.;KieBling, F.M.;Klein, O.;Lux, B.;Miller, W.;Rehse, U.;Root, O.
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.19 no.5
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    • pp.215-222
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    • 2009
  • Many concepts of external magnetic field applications in crystal growth processes have been developed to control melt convection, impurity content and growing interface shape. Especially, travelling magnetic fields (TMF) are of certain advantages. However, strong shielding effects appear when the TMF coils are placed outside the growth vessel. To achieve a solution of industrial relevance within the framework of the $KRISTMAG^{(R)}$ project inner heater-magnet modules(HMM) for simultaneous generation of temperature and magnetic field have been developed. At the same time, as the temperature is controlled as usual, e.g. by DC, the characteristics of the magnetic field can be adjusted via frequency, phase shift of the alternating current (AC) and by changing the amplitude via the AC/DC ratio. Global modelling and dummy measurements were used to optimize and validate the HMM configuration and process parameters. GaAs and Ge single crystals with improved parameters were grown in HMM-equipped industrial liquid encapsulated Czochralski (LEC) puller and commercial vertical gradient freeze (VGF) furnace, respectively. The vapour pressure controlled Czochralski (VCz) variant without boric oxide encapsulation was used to study the movement of floating particles by the TMF-driven vortices.

The Role of Professors' Intellectual Stimulation for Intellectual Growth among Chinese Students Who Study in Korea: The Moderating Effect of Growth Need Strength

  • Hahm, Sangwoo;Chen, Linlin
    • International Journal of Advanced Culture Technology
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    • v.8 no.3
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    • pp.45-53
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    • 2020
  • Professor's role is one of various ways to improve students' academic achievement. Professors can be role models for students, motivate them to achieve higher performance, and have various influences on them. Therefore, depending on professor's role, students' attitudes and behaviors may be different, and their academic achievements may also be different. In this regard, this research focused on the intellectual growth that can be regarded as Chinese students' academic achievement. Thus, the importance of professor's intellectual stimulation behavior was emphasized and it was clarified as a way to improve the intellectual growth. Furthermore, students with a higher level of growth need strength, they are more likely to have higher intellectual growth because they put a premium on their self-growth. In order to increase the influence of professor's intellectual stimulation, we focused on the student's growth need strength. Thus, this research examined the moderating effect of growth need strength between intellectual stimulation and intellectual growth. The results showed that intellectual stimulation improved intellectual growth. In addition, growth need strength positively moderated the relationship between intellectual stimulation and intellectual growth. Therefore, it suggested the implications that professors should behave appropriate behavior according to students' personal characteristics.

Milk-Derived Growth factors as Neutraceuticals

  • Kang, Shin-Ho
    • Journal of Dairy Science and Biotechnology
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    • v.25 no.1
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    • pp.27-31
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    • 2007
  • Colostrum has lots of bioactive components and many growth factors including insulin-like growth factors, transforming growth factors and epidermal growth factor. Colostrum and milk derived growth factors widely mediate the growth of overall development and could be used as treatment of gastrointestinal disorder, wound repair process, bioacrivity in the neonatal GI tract and induction of oral tolerance. It is possible that milk derived growth factors as potential neutraceuticals for the specific consumers may have a great role in future food industry.

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Transprt Phenomena in Bulk Crystal Growth Processes

  • Lan, C.W.
    • Proceedings of the Korea Association of Crystal Growth Conference
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    • 1998.06a
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    • pp.29-33
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    • 1998
  • Transport phenomena paly an inmportant role in bulk crystal growth processes. During crystal growth, the control of the growth front and the dopant concentration is crucial to crystal quality. The growth feasibility in thus determined by the heat transfer controlling the interface convexity and by the mass transfer controlling the constitutional supercooling. Through numerical modeling, a thorough understanding of the growth processes is possible, which in turn is a key to process improvenment. In this paper, we will summarize some work dine in my laboratory, both numerical and experimental, to illustrate the importance of understanding the transport phenomena during crystal growth processes.

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Short Stature and Growth Hormone Therapy (저신장 소아를 위한 성장호르몬 치료)

  • Park, Yong-Hoon
    • Journal of Yeungnam Medical Science
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    • v.22 no.1
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    • pp.1-12
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    • 2005
  • Normal growth and development is of prime concern during childhood. The treatment of children with growth hormone deficiency has been revolutionized by growth hormone therapy. An improved height outcome with a final height within the target height range has been achieved. However, close follow-up with regular clinical and laboratory monitoring is essential for achieving the desirable height outcome. The theoretical unlimited supply of growth hormone has led to its wide spread use in a variety of disorders other than a growth hormone deficiency. Initially used in children with Turner syndrome, growth hormone is now used to treat chronic renal failure, an idiopathic short stature and intrauterine growth restrictions in addition to a wide array of newly emerging indications. This review summarizes the basics for a proper growth assessment, the differentiation of normal and abnormal growth causes of a short stature, and the indications for growth hormone treatment.

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Modeling the Growth of Neurology Literature

  • Hadagali, Gururaj S.;Anandhalli, Gavisiddappa
    • Journal of Information Science Theory and Practice
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    • v.3 no.3
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    • pp.45-63
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    • 2015
  • The word ‘growth’ represents an increase in actual size, implying a change of state. In science and technology, growth may imply an increase in number of institutions, scientists, or publications, etc. The present study demonstrates the growth of neurology literature for the period 1961-2010. A total of 291,702 records were extracted from the Science Direct Database for fifty years. The Relative Growth Rate (RGR) and Doubling Time (Dt.) of neurology literature have been calculated, supplementing with different growth patterns to check whether neurology literature fits exponential, linear, or logistic models. The results of the study indicate that the growth of literature in neurology does not follow the linear, or logistic growth model. However, it follows closely the exponential growth model. The study concludes that there has been a consistent trend towards increased growth of literature in the field of neurology.

A Study of Causality between Country-level IT Investment and Economic Performance in the U.S. (미국의 정보기술 투자와 경제적 성과 사이의 인과성 연구)

  • Lee, Sang-Ho;Kim, Soung-Hie
    • Asia pacific journal of information systems
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    • v.16 no.2
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    • pp.111-122
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    • 2006
  • This paper investigated the causal relationship between IT investment and economic performance with the office, computing and accounting machinery (OCAM) and gross domestic product (GDP) statistics from the United States for the period 1961 to 2001. Due to non-stationary aspects of the series, found by unit root tests, it was deemed applicable to apply growth models using the first difference of the series. The results indicate that IT investment growth at the country level do not only cause economic performance growth, but are also caused by economic performance growth. While IT investment growth affect economic performance growth over shorter time periods, economic performance growth affect IT investment growth over longer time periods. As a result, this study reveals IT investment growth have the preceding effect on economic performance growth, and then economic performance growth impact subsequently on IT investment growth.

Long-term Growth Patterns and Determinants of High-growth Startups - Focusing on Korean Gazelle Companies during 2006-2020

  • Ko, Chang-Ryong;Lee, Jong Yun;Seol, Sung-Soo
    • Asian Journal of Innovation and Policy
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    • v.10 no.3
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    • pp.330-354
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    • 2021
  • To know the long-term growth patterns and determinants of successful startups, 15-year (2006-2020) panel data of 252 companies that had a growth rate of over 20% every year in the last three years were used. In the first analysis, statistics on the period required to designate a gazelle company or listed on the stock market were examined. In addition, five long-term growth patterns were presented. In the panel analysis, the R&D intensity, operating profit ratio, size, and age of the company were pointed out as determinants of growth. The operating profit margin and R&D intensity have a positive effect on growth. Gibrat's law was not supported, but an inverted U-shape was observed. Jovanovic's law was confirmed. Although many studies tend not to point to profitability as a determinant of long-term growth, this is an important long-term growth factor of a company. The operating profit ratio was used in this study.

The Changing Roles of Ownership in the Economic Growth in China

  • Lee, Hyuntai
    • Anayses & Alternatives
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    • v.4 no.2
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    • pp.39-70
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    • 2020
  • This paper examines the changing roles of ownership in the economic growth by using a panel data set of 30 provinces in China for the period (1999-2010). With the use of absolute and relative presence variables, this study shows that private enterprises have emerged as the engine of economic growth in China in the later period (2005-2010). The growing size and number of private enterprises are positively linked to growth. However, though foreign-invested enterprises have been acclaimed as the main contributors to economic growth in China, they have minimal effect on the economic growth in the later period. State-owned enterprises have a significant and negative effect on the economic growth in the later period. The results can be interpreted that the engine of growth in China has been changed over time from other ownerships to private ownership. Private companies have developed a lot in every respect and started to lead the economy for long-run growth. China initiated its economic growth by adopting foreign capital and it is still the top destination for foreign direct investment among developing countries. However, to sustain the growth over a long period, private sector should be of great importance and perform a key role in the view of catch-up economics.

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