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Post-Translational Regulation of AtFER2 Ferritin in Response to Intracellular Iron Trafficking during Fruit Development in Arabidopsis

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Molecular Plant 2009年第5期2卷 1095-1106页

作者： Karl Ravet Brigitte Touraine Sun A. Kim Francoise Cellier Sebastien Thomine Mary Lou Guerinot Jean-Francois Briat frederic Gaymard Biochimie et Physiologie Moleculaire des Plantes (B&PMP) Unite Mixte de Recherche CNRS INRA Universite Montpellier 2 SupAgro Place Viala Bat. 7 F-34060 Montpellier France Department of Biological Sciences Dartmouth College 6044 Gilman Hall Hanover NH 03755 USA Institut des Sciences du Vegetal CNRS Bat 23 Avenue de la Terrasse 91198 Gif-sur-Yvette France

Ferritins are major players in plant iron homeostasis. Surprisingly, their overexpression in transgenic plants led only to a moderate increase in seed iron content, suggesting the existence of control checkpoints for iron loading and storage in seeds. This work reports the identification of two of these checkpoints. First, measurement of seed metal content during fruit development in Arabidopsis thaliana reveals a similar dynamic of loading for Fe, Mn, Cu, and Zn. The step controlling metal loading into the seed occurs by the regulation of transport from the hull to the seed. Second, metal loading and ferritin abundance were monitored in different genetic backgrounds affected in vacuolar iron transport （AtVIT1, AtNRAMP3, AtNRAMP4） or plastid iron storage （AtFER1 to 4）. This approach revealed （1） a post-translational reg- ulation of ferritin accumulation in seeds, and （2） that ferritin stability depends on the balance of iron allocation between vacuoles and plastids. Thus, the success of ferritin overexpression strategies for iron biofortification, a promising approach to reduce iron-deficiency anemia in developing countries, would strongly benefit from the identification and engineering of mechanisms enabling the translocation of high amounts of iron into seed plastids.

关键词： Nutrient and metal transport iron transport ferritin post-transcriptional control biofortification Arabidopsis.

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Fundamentals of Anatomy & Physiology (9th Edition) 9

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2012年

作者： frederic H. Martini, Judi L. Nath, Edwin F. Bartholomew

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Habitat-induced reciprocal transformation in the root phenotype of Oriental ginseng is associated with alteration in DNA methylation

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Chinese Science Bulletin 2011年第16期56卷 1685-1690页

作者： NGEZAHAYO frederic WANG XiaoLi YU XiaoMing JIANG LiLi CHU YunJie SHEN BaiHua YAN ZhongKai LIU Bao Key Laboratory of Molecular Epigenetics of Ministry of Education Northeast Normal University Changchun 130024 China Department of Agronomy Jilin Agricultural University Changchun 130118 China Changchun University of Chinese Traditional Medicine Changchun 130021 China Baihua Ginseng Cooperation Ltd Shanghai 200010 China

Oriental ginseng is an important medicinal plant that grows in 2 major forms or ecotypes,wild and *** form differs conspicuously in root phenotype,but can be converted from one type to another by *** we show that the habi tat-induced transformation of ginseng root phenotype was accompanied by alteration in cytosine methylation at a large number of 5′-CCGG-3′sites detected by the methylation-sensitive polymorphism(MSAP)*** collective CG and CHG methylation levels of all 4 landraces of the domesticated form were significantly lower than those of the wild ***,artificially transplanted ginseng plants recreated in both directions the methylation levels(at least in CHG)of their natural *** methylation differences between the 2 ginseng ecotypes were validated at 2 isolated MSAP loci bearing homology to a 5S rRNA gene or a copia *** results implicate a link between epigenetic variation and habitat-induced phenotypic flexibility in Oriental ginseng.

关键词： DNA甲基化人参植物相互转化表型诱导东方甲基化水平人居

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5.4-TW/46-fs 10-Hz Ti:sapphire laser system

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Science China Mathematics 2000年第5期43卷 533-538页

作者：徐至展杨晓东 Vigroux Luc Saviot frederic 周建平张正泉王益民张文琦 Laboratory for High Intensity Optics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China Thomson-CSF Laser/B.M.Industries Division CE 2901 LISSES91029 EvryCedexFrance Department of Physics Washington State University Pullman WA99164 USA

We have developed a compact Ti:sapphire laser system which can generate 5.4-Tw pulses at 10-Hz repetition rate. Chirped-pulses are amplified to 450 mj by a regenerative amplifier, a 4-pass amplifier and a 3-pass ampli... 详细信息

关键词： chirped-pulse amplification gain narrowing aberration-free stretcher.

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油基钻井液体系轻烃组分分配系数计算及应用

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石油勘探与开发 2022年第4期49卷 787-797页

作者： ABDALLAH Bacem Rabie Ben AHMADI Riadh LYNEN frederic REKHISS Farhat 突尼斯斯法克斯国家工程学院LR3E实验室斯法克斯3000突尼斯比利时根特大学有机与高分子化学系根特9000比利时

采用一种基于静态顶空气相色谱技术的热力学方法研究了油基钻井液、地层流体和钻井液气体之间的关系,计算了两种油基钻井液-空气体系nC_(5)—nC_(8)范围内47种轻烃组分的分配系数,在热力学平衡条件下开展原始地层流体组分重构。研究表明... 详细信息

采用一种基于静态顶空气相色谱技术的热力学方法研究了油基钻井液、地层流体和钻井液气体之间的关系,计算了两种油基钻井液-空气体系nC_(5)—nC_(8)范围内47种轻烃组分的分配系数,在热力学平衡条件下开展原始地层流体组分重构。研究表明,油基钻井液对钻井液气体中nC_(5)—nC_(8)范围内的地层流体组分的影响很小,对于低毒性合成油基钻井液,影响小于1%,对于柴油基钻井液,影响小于10%。对于多数轻烃组分,采用气相校准法和直接定量法确定的分配系数的误差小于10%,直接定量法计算的分配系数更准确。两种原油样品重构组分与真实组分之间的匹配度分别为91%和89%,证明利用nC_(5)—nC_(8)范围内轻烃组分分配系数通过静态顶空分析重构原始地层流体组分的可行性和准确性较高。

关键词：油基钻井液钻井液气体轻烃组分分配系数地层流体

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Bacteria may contribute to distant species recognition in ant-aphid mutualistic relationships

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Insect Science 2017年第2期24卷 278-284页

作者： Christophe Y. Fischer Claire Detrain Philippe Thonart Eric Haubruge frederic Francis Francois J. Verheggen Georges C. Lognay Laboratory of Analytical Chemistry University of Liege Gembloux Agro-Bio Tech Passage des Deportes 2 5030 Gembloux Unit of Social Ecology Universite Libre de Bruxelles CP231 50 avenue F. Roosevelt B-1050 Brussels Walloon Center of Industrial Biology University of Liege B40 Sart-Tilman 4000 Liege 4Functional and Evolutionary Entomology University of Liege Gembloux Agro-Bio Tech Passage des Deportes 2 5030 Gembloux Belgium

Mutualistic interactions between ant and aphid species have been the subject of considerable historical and contemporary investigations, the primary benefits being clean- ing and protection for the aphids and carbohydrate-rich honeydew for the ants. Questions remained, however, as to the volatile semiochemical factor influencing this relationship. A recent study highlighted the role of bacterial honeydew volatile compounds in ant at- traction. Here, ant＇s ability to distantly discriminate 2 aphid species was investigated based on bacterial honeydew semiochemicals emissions using a two-way olfactometer. Both the mutualistic aphid Aphis fabae L. and the nonmyrmecophilous aphid Acyrthosiphon pisum Harris were found to be attractive for the ant Lasius niger L. The level of attraction was similar in both assays （control vs. one of the aphid species）. However, when given a choice between these 2 aphid species, ants showed a significant preference for Aphis fabae. Honeydew volatiles, mostly from bacterial origins, are known to be a key element in ant attraction. Using the same olfactometry protocol, the relative attractiveness of volatiles emitted by honeydews collected from each aphid species and by bacteria isolated from each honeydew was investigated. Again, ants significantly preferred volatiles released by Aphis fabae honeydew and bacteria. This information suggests that microbial honeydew volatiles enable ants to distantly discriminate aphid species. These results strengthen the interest of studying the occurrence and potential impact of microorganisms in insect symbioses.

关键词： ant aphid bacteria honeydew mutualism recognition VOC

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Oil Refining Planning under Petroleum Products Demand Uncertainties： Case of Algeria

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Journal of Energy and Power Engineering 2012年第6期6卷 858-868页

作者： Aderrezak Benyoucef frederic Lantz Petroleum Economics& Management Department (PEM) Algerian Petroleum Institute Boumerdes 35000 Algeria Center for Economics and Management IFP-Enegries Nouvelles Rueil-Malmaison 92852 France

This paper aims to analyze, with a linear dynamic programming, the Algerian refining industry development by 2030 in the presence of uncertainties, both on the domestic demand and the exportation of the petroleum products. Currently, the Algerian refining industry has to be adapted to meet demand progress both in terms of volume and also in terms of specifications, in a general context marked by a strong volatility of the oil markets. Commonly, refining operations planning models are based on a deterministic linear programming. However, because of the demand fluctuation, and other conditions for the market, many parameters should be considered as uncertain such as the demand and the exportation. The impact of such uncertainties on the development＇s pattern of refining capacities is analyzed with a stochastic model. Finally, the results of both deterministic and stochastic models are compared.

关键词： Planning optimization stochastic model oil refining.

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An analysis on Sino-Russian cooperation in the Arctic in the BRI era

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Advances in Polar Science 2018年第4期29卷 269-282页

作者： Olga ALEXEEVA frederic LASSERRE Universite du Quebec a Montreal Case postale 8888Succursale Centre-VilleMontrealQuebec H3C 3P8Canada Laval University 2405 TerrasseQuebec CityQuebec G1V 0A6Canada

Over the past decade Sino-Russian cooperation in the Arctic has emerged as one of the major topics of the Russia-China negotiations on how to expand their comprehensive strategic partnership and to bring it to a new level. China considers the Arctic region important for its economic interests and desires to be included in the development of the region and its economic potential. For Russia, the Arctic is a future strategic resource base that would replace the old depleting fields and assure Russia’s status as a major worldwide energy supplier. Despite many joint statements on deepening of the Sino-Russian cooperation in the development of the Arctic energy resources, the concrete results of these ambitious plans are few. Some joint projects were dropped, as China and Russia could not agree on the conditions of the deal, others are progressing very slowly and have an uncertain future. In 2017, China has expanded its "Belt and Road Initiative"(BRI) to the Arctic thus elevating the Sino-Russian cooperation in the Artcic to a higher level. How did the relationship between Russia and China evolve in the Arctic and how do Russia and China view and respond to the new Arctic dimension of the BRI? What factors limit the strategic rapprochement between China and Russia in the Arctic?

关键词： Arctic China-Russia cooperation Belt and Road Initiative Yamal LNG Northern Sea Route

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Solid state anaerobic digestion of water poor feedstock for methane yield:an overview of process characteristics and challenges

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Waste Disposal and Sustainable Energy 2021年第3期3卷 227-245页

作者： Kunwar Paritosh Vinod Kumar Nidhi Pareek Dinabandhu Sahoo Yadira Bajon Fernandez frederic Coulon Tanja Radu Nupur Kesharwani Vivekanand Vivekanand Centre for Energy and Environment Malaviya National Institute of TechnologyJaipurRajasthan 302017India School of Water Energy and EnvironmentCranfield UniversityCranfield MK430 ALUK Department of Microbiology School of Life SciencesCentral University of Rajasthan BandarsindriKishangarhAjmerRajasthan 305801India Department of Botany University of DelhiDelhi 110007India School of Architecture Building and Civil EngineeringLoughborough UniversityLoughborough LE113TUUK Department of Civil Engineering National Institute of TechnologyRaipurChhattisgarh 492010India

Solid state anaerobic digestion(SSAD)of water poor feedstock may be a promising technology for energy *** having high solid concentration like lignocellulosic biomass,crop residues,forestry waste and organic fraction of municipal waste may be the appropriate feedstock for its biochemical conversion into energy carries like biomethane through *** to liquid state anaerobic digestion(LSAD),SSAD can handle higher organic loading rates(OLR),requires less water and smaller reactor volume and may have lower energy demand for heating or stirring and higher volumetric methane *** these,pathogen inactivation may also be achieved in SSAD of biodegradable *** 60%of recently built AD systems have adopted SSAD ***,the process stability of an SSAD system may have several constraints like limited mass transfer,process inhibitors and selection of digester type and should be addressed prior to the implementation of SSAD *** this article,a comprehensive overview of the key aspects influencing the performance of SSAD is discussed along with the need for mathematical modelling *** to this,reactor configuration for SSAD and digestate management requirement and practice for solid-state condition are reviewed for a better insight of SSAD technology.

关键词： Solid state anaerobic digestion Clean energy Mathematical modelling Digestate management Biogas Biomass

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What are extreme environmental conditions and how do organisms cope with them？

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Current Zoology 2011年第3期57卷 363-374页

作者： John C. WINGFIELD J. Patrick KELLEY frederic ANGELIER Department of Neurobiology Physiology and Behavior University of California One Shields Avenue Davis CA 95616 U.S.A

Severe environmental conditions affect organisms in two major ways. The environment may be predictably severe such as in deserts, polar and alpine regions, or individuals may be exposed to temporarily extreme conditions through weather, presence of predators, lack of food, social status etc. Existence in an extreme environment may be possible, but then to breed or molt in addition can present major bottlenecks that have resulted in the evolution of hormone-behavior adaptations to cope with unpredictable events. Examples of hormone-behavior adaptations in extreme conditions include attenuated testosterone secretion because territoriality and excess courtship may be too costly when there is one opportunity to reproduce. The individual may even become insensitive to testosterone when target areas of the brain regulating reproductive behavior no longer respond to the hormone. A second example is reduced sensitivity to glucocorticoids following acute stress during the breeding season or molt that allows successful reproduction and/or a vital renewal of the integument to endure extreme conditions during the rest of the year. Reduced sensitivity could involve：（a） modulated response of the hypothalamo-pituitary-adrenal axis, （b） reduced sensitivity to high glucocorticoid levels, or （c） a combination of （a） and （b）. Moreover, corticosteroid binding proteins （CBP） buffer responses to stress by reducing the movement of glucocorticoids into target cells. Finally, intracellular enzymes （11 β-hydroxysteroid dehydrogenase and variants） can deactivate glucocorticoids entering cells thus reducing interaction with receptors. These mechanisms have important implications for climate change and increasing extremes of weather [Current Zoology 57 （3）： 363-374, 2011].

关键词： Extreme environment Habitat configuration Glucocorticoids Stress response Corticosteroid-binding proteins Behavior

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