• Title/Summary/Keyword: regulatory control

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The Gac/Rsm Signaling Pathway of a Biocontrol Bacterium, Pseudomonas chlororaphis O6

  • Anderson, Anne J.;Kang, Beom Ryong;Kim, Young Cheol
    • Research in Plant Disease
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    • v.23 no.3
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    • pp.212-227
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    • 2017
  • Pseudomonas chlororaphis O6, isolated from the roots of dryland, field-grown commercial wheat in the USA, enhances plant health and therefore it is used in agriculture as a biofertilizer and biocontrol agent. The metabolites produced by this pseudomonad stimulate plant growth through direct antagonism of pathogens and by inducing systemic resistance in the plant. Studies upon P. chlororaphis O6 identify the pathways through which defined bacterial metabolites generate protection against pathogenic microbes, insects, and nematodes. P. chlororaphis O6 also triggers plant resistance to drought and salinity stresses. The beneficial determinants are produced from bacterial cells as they form biofilms during root colonization. Molecular control these processes in P. chlororaphis O6 involves the global regulatory Gac/Rsm signaling cascade with cross-talk between other global regulatory pathways. The Gac/Rsm regulon allows for coordinate phasing of expression of the genes that encode these beneficial traits among a community of cells. This review provides insights on the Gac/Rsm regulon in expression of beneficial traits of the P. chlororaphis O6 which can contribute to help yield enhancement and quality in agricultural production.

The Effects of Glechoma longituba on Rats Fed High Diet (금전초(金錢草) 추출물(抽出物)이 고지방식이(高脂肪食餌)로 유발한 비만(肥滿) 흰쥐에 미치는 영향(影響))

  • Lee Hun-Gyu;Byun Joon-Seok;Buyn Sung-Hui;Kim Sang-Chan
    • Herbal Formula Science
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    • v.10 no.1
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    • pp.61-72
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    • 2002
  • This present study was carried out to investigate the body weight-regulatory effects of Glechoma longituba in high fat diet-induced obese rats. Control group rats were fed with high fat diet and administered normal saline for 8weeks. Experimental groups rats were fed with high fat diet and administered extract of Glechoma longituba for 8 weeks. And observed that, body weight of rats and total cholesterol, triglyceride, free fatty acid, phospholipid in serum of rats. The results were as follows: 1. There were decrease of body weight of rats in GL group, but these results showed no significant efficacy. 2. There were significant decrease of serum total cholesterol level in GL group. 3. There were decrease of serum triglyceride level in GL group, but these results showed no significant efficacy. 4. There were decrease of serum free fatty acid level in GL group. but these results showed no significant efficacy. 5. There were significant decrease of serum phospholipid level in GL group. According to above mentioned results, Glechoma longituba is expected to be applied to the prevention or treatment of obesity and its complications.

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지적재산권의 역사적 연원- 저작권과 특허를 중심으로 -

  • 황혜선
    • Journal of Korean Library and Information Science Society
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    • v.20
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    • pp.455-470
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    • 1993
  • In recent years, the intellectual property rights (IPR) are increasingly becoming trade goods and the subject of international trade negotiations. During the past decades, intellectual properties earned critical importance for economic development in both developed and developing countries. Developed countries, headed by the United States, that recognize the economic value of the IPR in the world market are aggressively seeking for universal protection of IPR throughout the world. Intellectual properties have unique qualities that distinguish them from other tangible goods. Most importantly, they are public goods created on the basis of knowledge and information accumulated throughout human history and shared by different cultures. However, there is a growing tendency that the quality of public goods are being etched away as the property concept in IPR expands. In this paper, I discuss how copyright and patent laws incorporated the concept of property right as natural right to one's intellectual creations in early formation of the laws in Europe. I argue that copyright law and patent law are the historical products resulting from political, economic, and ideological factors interacting in a certain society. A history of copyright and patent points to that the intellectual property rights as natural lights of authors and inventors as argued by developed countries in international disputes, are not universal, but unique historical products. Copyright and patent laws have been shaped and developed as regulatory measures by governments to promote and control industries by providing authors and inventors with monopoly incentives. Since property right was used as a regulatory device it was restricted. This is to enhance the distribution of knowledge and information rather than to ensure the property right as an absolute right.

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Resources for Systems Biology Research

  • Kim Jin-Sik;Yun Hong-Seok;Kim Hyun-Uk;Choi Hyung-Seok;Kim Tae-Yong;Woo Han-Min;Lee Sang-Yup
    • Journal of Microbiology and Biotechnology
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    • v.16 no.6
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    • pp.832-848
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    • 2006
  • Systems biology has recently become an important research paradigm that is anticipated to decipher the metabolic, regulatory, and signaling networks of complex living organisms on the whole organism level. Thus, various research outputs are being generated, along with the development of many tools and resources for systems biology research. Accordingly, this review provides a comprehensive summary of the current resources and tools for systems biology research that will hopefully be helpful to researchers involved in this field. The resources are categorized into the following five groups: genome information and analysis, transcriptome and proteome databases, metabolic profiling and metabolic control analysis, metabolic and regulatory information, and software for computational systems biology. A summary table and some future perspectives are also provided.

Development of Environmentally Sound Herbicides and Their Formulations (환경친화적(環境親和的) 제초제(除草劑) 및 제형(製型) 개발(開發))

  • Oh, Byung-Youl
    • Korean Journal of Weed Science
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    • v.17 no.1
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    • pp.94-111
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    • 1997
  • A relatively wide range of weed technology concerning sound herbicide development, its formulation exploitation, and application techniques was extensively reviewed in accordance with least inputted sustainable agriculture. Herbicide plays an integral part of farmers' cultural practices in Korean agriculture like rest of world over. Weeds are more obstacle to the adaptation of more sustainable agriculture system. Because weeds dictate most of the crop production practices, weed scientists must become the leaders of collaborative integrated approaches to agriculture systems research. Feasible ways to minimize herbicide input involve the positive introduction of low-rate selective chemistries, innovative formulations, biological herbicides and newly developed application technology. Since herbicide will remain to be a core position in weed management for the foreseeable future, research is needed to optimize herbicide application technology and to minimize their impact on the environment. Public concerns and regulatory pressures on agricultural chemicals are likely to strengthen throughout this decade and coming. Researchers, pesticide manufacturing industries and regulatory authorities have to work together more closely, leading to understand each other better, as well as the needs of our customers and those of society. To be taken extensively, weed control management practices in the future have to be accepted such a way the respective demands of environment, society and economics are entirely matched.

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High Cadmium Levels in Cured Meat Products Marketed in Nigeria - Implications for Public Health

  • Adejumo, Olufunmilayo E;Fasinu, Pius S;Odion, Judith E;Silva, Boladale O;Fajemirokun, Timothy O
    • Asian Pacific Journal of Cancer Prevention
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    • v.17 no.4
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    • pp.1933-1936
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    • 2016
  • Heavy metals are known to disrupt important physiological processes in living cells, and have been responsible for various pathological conditions with possible contributions to cancer development. Food contamination have been identified as one of the ways humans are exposed to heavy metals. In developing countries like Nigeria, the regulatory framework for enforcing compliance with globally acceptable exposure to deleterious contaminants is poor. In the current study, thirteen samples of cured meat products of diverse origin marketed in South-west Nigeria were evaluated for lead, cadmium, chromium and nickel contents using the atomic absorption spectroscopy technique. All the samples analysed contained cadmium between 0.35 and 1.20 ppm, levels considered higher than acceptable limits in consumable products. Lead, chromium and nickel were not detected in any of the samples. As known cumulative poisons, there is the need for stringent regulatory control of these heavy metals in cured meat products imported into or produced indigenously in the country in order to minimize the risks to public health.

Epidermal Growth Factor Receptor-Related DNA Repair and Radiation-Resistance Regulatory Mechanisms: A Mini-Review

  • Bai, Jing;Guo, Xiao-Guang;Bai, Xiao-Ping
    • Asian Pacific Journal of Cancer Prevention
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    • v.13 no.10
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    • pp.4879-4881
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    • 2012
  • Epidermal growth factor receptor (EGFR) overexpression is associated with resistance to chemotherapy and radiotherapy. The EGFR modulates DNA repair after radiation-induced damage through an association with the catalytic subunit of DNA protein kinase. DNA double-strand breaks (DSBs) are the most lethal type of DNA damage induced by ionizing radiation, and non-homologous end joining is the predominant pathway for repair of radiation-induced DSBs. Some cell signaling pathways that respond to normal growth factors are abnormally activated in human cancer. These pathways also invoke the cell survival mechanisms that lead to resistance to radiation. The molecular connection between the EGFR and its control over DNA repair capacity appears to be mediated by one or more signaling pathways downstream of this receptor. The purpose of this mini-review was not only to highlight the relation of the EGFR signal as a regulatory mechanism to DNA repair and radiation resistance, but also to provide clues to improving existing radiation resistance through novel therapies based on the above-mentioned mechanism.

CREB and FoxO1: two transcription factors for the regulation of hepatic gluconeogenesis

  • Oh, Kyoung-Jin;Han, Hye-Sook;Kim, Min-Jung;Koo, Seung-Hoi
    • BMB Reports
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    • v.46 no.12
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    • pp.567-574
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    • 2013
  • Liver plays a major role in maintaining glucose homeostasis in mammals. Under fasting conditions, hepatic glucose production is critical as a source of fuel to maintain the basic functions in other tissues, including skeletal muscle, red blood cells, and the brain. Fasting hormones glucagon and cortisol play major roles during the process, in part by activating the transcription of key enzyme genes in the gluconeogenesis such as phosphoenol pyruvate carboxykinase (PEPCK) and glucose 6 phosphatase catalytic subunit (G6Pase). Conversely, gluconeogenic transcription is repressed by pancreatic insulin under feeding conditions, which effectively inhibits transcriptional activator complexes by either promoting post-translational modifications or activating transcriptional inhibitors in the liver, resulting in the reduction of hepatic glucose output. The transcriptional regulatory machineries have been highlighted as targets for type 2 diabetes drugs to control glycemia, so understanding of the complex regulatory mechanisms for transcription circuits for hepatic gluconeogenesis is critical in the potential development of therapeutic tools for the treatment of this disease. In this review, the current understanding regarding the roles of two key transcriptional activators, CREB and FoxO1, in the regulation of hepatic gluconeogenic program is discussed.

Evaporation Rate in Protein Crystallization Via Vapor Diffusion can be Controlled through a Simple Multistep-concentration Setting in Capillaries

  • Lee, Min-Nyung;Chung, Yong-Je
    • Korean Journal of Crystallography
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    • v.14 no.1
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    • pp.35-38
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    • 2003
  • A simple multistep-concentration setting in capillaries was used to control the water-evaporation rate in vapor-diffusion protein crystallization. In the method used, a variety of evaporation rate curves were obtained by using the secondary precipitant solution referred to as “regulatory solution”, which is not directly exposed to the protein solution. The curves were applied to the crystallization of lysozyme as a model protein. The results clearly showed that crystal growth is dependent on the evaporation rate. Especially, the decoupling curves in which precipitant concentration in protein solutions increases to a certain point and then decreases to the equilibrium concentration gave the best crystals.

Country-Level Governance Quality and Stock Market Performance of GCC Countries

  • MODUGU, Kennedy Prince;DEMPERE, Juan
    • The Journal of Asian Finance, Economics and Business
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    • v.7 no.8
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    • pp.185-195
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    • 2020
  • This study examines the association between governance quality at country level and stock market performance. Specifically, the study investigates the influence of control of corruption, government effectiveness, political stability and absence of violence, rule of law, regulatory quality, and voice and accountability on all-share index of the stock markets of the six Gulf Cooperation Council (GCC) countries. This study is anchored on two theories - the Efficient Market Hypothesis (EMH) and Institutional Theory. The study employs panel data spanning from 2006 to 2017. The findings show that political stability and absence of violence and rule of law exhibit a significant positive impact on stock market performance, while regulatory quality and voice and accountability have a significant, but negative relationship with stock market performance. The results imply that quality of governance in terms of rule of law and political stability devoid of violence have strong impact on stock market returns. Similarly, improved stock market returns are largely dependent on the efficiency of the institutional environment of market as investors are always wary of the inherent risks associated with the uncertainty of the market. This study has crucial policy implications for the government of the GCC countries and stock market participants.