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موضوع: موقعیت‌های خالی در دانشگاه‌های خارج از کشور

  1. #11
    ApplyAbroad Hero nima56 آواتار ها
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    Nov 2008
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    PhD scholarship in Remediation of Soil and Groundwater Contamination

    The use of iron hydroxide nano-composites for chlorinated solvent remediation
    Applications are invited for a PhD scholarship in the area of remediation of soil and groundwater contamination. The PhD position will be funded by the Danish Research Council of Technology and Production and the Technical University of Denmark, in the research project Iron-X, running 2009-2012.

    Project description
    A newly established research project “Iron hydroxide intercalates for degradation of halogenated solvents in sediment and groundwater (Iron-X)” aims to investigate the potential for remediation of soil and groundwater contaminated with chlorinated solvents by the use of iron hydroxide nano-composites. A focus area will be on use of iron hydroxide nano-composites for in-situ remediation of chlorinated solvent source areas. The project is expected to include laboratory investigations of remedial effects in solvent contaminated soil and groundwater and provided these are successful, a field pilot trial of the technology at a contaminated site in Denmark. The Iron-X consortium consists of research groups from the Technical University of Denmark (DTU), University of Copenhagen (KU LIFE) and University of Iowa, U.S.A. The field trial will be conducted in collaboration with a Danish Region and a consulting company.

    Qualifications
    For this position we seek a PhD candidate with a Master’s degree in environmental engineering, geochemistry or geomicrobiology. Experience with laboratory and/or field investigations is necessary. Experience with modern chemical analytical techniques and/or model application is preferable. We expect good communication skills, both verbally and in writing. The position is open to both international and Danish candidates.

    The PhD project will be carried out in close collaboration with a group of PhD students and researchers from DTU Environment (www.env.dtu.dk), Department of Basic Sciences and Environment, KU LIFE (www.igm.life.ku.dk) and Department of Civil and Environmental Engineering, University of Iowa (www.uiowa.edu).

    The PhD candidate will be enrolled at the Technical University of Denmark, DTU Environment. The full scholarship will be for an enrollment period of 3 years.

    Approval and Enrolment
    The scholarships for the PhD degree are subject to academic approval, and the candidates will be enrolled in the Chemistry, Biotechnology and Chemical Engineering PhD programme at DTU and will be affiliated with the research educational programme RECETO (www.receto.dk). For information about the general requirements for enrolment and the general planning of the scholarship studies, please see the DTU PhD Guide.

    Salary and appointment terms
    The salary and appointment terms (3 years) are consistent with the current rules for PhD students.

    Further information
    Further information is available from Associate Professor Mette M. Broholm, DTU Environment, phone: +45 4525 1475.

    The successful candidate will be expected to start as soon as possible after January 1st, 2010.

    Application
    We must have your application by December 23rd, 2009. Please open the link “apply for this job online” and fill in the application form and attach your application and Curriculum Vitae. The application must include documentation of a completed master’s degree including grades, a 1 page abstract of your master thesis, and documentation of English communication skills (e.g. TOEFL test or similar). Candidates may apply prior to obtaining their master’s degree, but cannot begin the PhD studies before the master’s degree has been received.

    All interested candidates irrespective of age, gender, religion or ethnic background are encouraged to apply.
    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  2. #12
    ApplyAbroad Veteran

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    Apr 2009
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    http://nettopp.ntnu.no/nettopp_lesme...f12f4.86374389

    One PhD position within plant ecology is available at Department of Biology for a period of 3 years, with a possibility of up to 4 years including corresponding teaching duties.

    The fellowship runs under the doctoral programme at the Faculty of Natural Sciences and Technology. The faculty is the employer, and working place is Department of Biology. The Department has 36 members of faculty (professors and associate professors), 22 research scientists and about 75 PhD students and post docs.

    The department has research programs in evolutionary biology, population genetics, aquatic and terrestrial ecology, conservation biology and biodiversity, ethology, molecular biology, cell biology, plant and animal physiology and ecophysiology, aquaculture, and marine biology. There is considerable collaboration between the disciplines. Further information about the Department of Biology can be found at: http://www.ntnu.no/biologi/english

    The candidate will be working with the impact of climate on vegetation distribution. He or she will be studying the adaptative capacity or colonization capacity of different plant functional types under different climatic conditions. There is further the option to focus on invasibility of different plant community types. Studies along latitudinal or altitudinal gradients will be central in combination with testing hypothesis in experiments in lab, common garden or field. The candidate therefore needs to be able to be active in the field often for extended periods.

    For further information contact Bente J. Graae, e-mail: Bente.Graae@bio.ntnu.no

    The position requires a Master of Science (MSc/Cand scient) degree or similar within biology. Experience in molecular genetic laboratory techniques as well as a solid understanding of population and evolutionary genetics will be helpful to the successful candidate.

    The appointment of the PhD research fellow will be made according to Norwegian guidelines for universities and university colleges and to the general regulations regarding university employees. Applicants for the position must agree to participate in organized doctoral study programs within the period of the appointment and have to be qualified for the PhD-study. A contract will be drawn up regarding the period of appointment and work-related duties.

    In order to be accepted as a PhD student the grades of the MSc project has to be sufficiently high (in Norway: B/2.5 or better), or the applicant has to document a similar level through later scientific work. Candidates from universities outside Norway are kindly requested to send a Diploma Supplement or a similar document, which describes in detail the study and grade system and the rights for further studies associated with the obtained degree: http://ec.europa.eu/education/polici...iploma_en.html

    The application must contain information on education, exams and previous practice. Publications and other scientific works which the applicant wishes to be taken into consideration must be attached to the application. Multi-authored publications will be considered but, in cases where the impact of the applicant on the publication is not evident, a brief description of the role of the applicant in the work should be enclosed.

    The government work force of Norway should reflect the diversity of the population, and this is an “Equal Opportunities position”.

    The start salary for the PhD research fellow is set at level 45, NOK 355 400 (before tax) in the Norwegian state salary scale. 2 % of the salary will be deducted at source as a mandatory premium to the Norwegian State Pension Fund.

    Within the application deadline, applicants should submit the application, a CV, certified copies of certificates of education and other relevant documents, three referees with e-mail addresses and phone number.

    Applications should be submitted electronically through www.jobbnorge.no. Preferably we want the attachments in one file. Publications and other scientific works that can’t be sent electronically, must be sent separate in 3 copies to NTNU, Faculty of Natural Science and Technology, 7491 Trondheim, Norway, within the application deadline. These publications will only be returned by inquiry.

    Reference number: NT-78/09. Application deadline: 25.01.2010.

  3. #13
    Junior Member
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    Oct 2007
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Two Open Graduate Research Assistantships
    Usama El Shamy (Environmental and Civil Engineering Department) and Paul Krueger (Mechanical Engineering Department) at Southern Methodist University in Dallas, Texas, USA announce two open Graduate Research Assistantships for their project entitled “Multiscale experimental and computational investigations of erosion-induced failure of levee systems” and recently funded by the National Science Foundation. The activities of this interdisciplinary research effort are centered around providing an experimentally validated, and thus predictive, computational research tool for the analysis and design of geotechnical systems subjected to extreme loading conditions and exploring the complex response of flood-induced failure of levee systems under representative flooding scenarios. The research includes a computational component, supervised by Prof. El Shamy, and an experimental component, supervised by Prof. Krueger. One GRA opening is available for each component, brief descriptions of which are given below.
    Computational Component (Prof. El Shamy): A multi-scale computational approach that combines the best features of continuum-based techniques and microscale models will be developed to simulate the soil-fluid-structure system that represents a levee in a general way. The objective of the computational work is to capture, with minimal empirical tuning, the effects of surface waves and deformation of the floodwall, the possible separation between of the floodwall and from the soil as floodwater rises and the impact of such separation on the distribution of water pressure surrounding the wall as well as possible occurrence of piping and scour in the soil media in the neighborhood of the floodwall. The project requires a student with a strong background in programming (preferably using C++) and is familiar with computational modeling tools such the finite element method, DEM, and CFD.
    Experimental Component (Prof. Krueger): The novel experimental program will quantitatively investigate the interaction between a fluid and embedded particles in shear and unsteady flows. Using transparent particles embedded in a matched-index-of-refraction fluid, the combined motion of the fluid and densely-packed particles will, for the first time, be measured using a combination of digital particle image velocimetry (DPIV) and direct imaging of the embedded particles. The experimental results will serve to construct a model for the lift force on particles – which is necessary for accurate simulations of scour and erosion. Additionally, experiments of simplified model levee systems will be used to validate the computational method. Prior experience with DPIV is not a requirement for this project, but experience with DPIV and image processing will be evaluated positively. Interested students must have some computer programming experience, preferably in Matlab.
    The GRA positions will be for 2.5 years, beginning fall of 2010. The positions include a tuition waiver and a monthly stipend of $1650. Students who have completed a Masters degree are preferred, but exceptional students who have completed a Bachelors degree and have experience related to the research will also be considered. Commensurate with the expectations of a PhD degree, the students will be expected to work as a teaching assistant in departmental laboratory courses for two semesters during the research project to assist in the development of teaching and communication skills. Candidates interested in either component should send a detailed résumé and one-page statement of interest to the appropriate supervisor. To meet deadlines for the fall semester, candidates should send information as soon as possible. The contact information for the project supervisors is given below:
    Paul Krueger
    P.O. Box 750337
    Dallas, TX 75275
    pkrueger@lyle.smu.edu
    Usama El Shamy
    P.O. Box 750340
    Dallas, TX 75275
    uelshamy@lyle.smu.edu

  4. #14
    ApplyAbroad Hero nima56 آواتار ها
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    Nov 2008
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Research project in Geology

    50000403v1581
    Promoter: Manuel Sintubin


    Description: In the Geology Section a PhD position is available in one of the following research

    domains: Petrology, Applied Mineralogy, Archeometry, or Geodynamics & Geofluids.
    Candidates will perform research in one of the following research topics:
    (1) Application of radiogenic isotopes in the study of water-rock interactions and the origin of metals in stratiform sediment-hosted ore deposits
    (2) Mineralogical study of historic natural cement types (Roman cement - 19th century)
    (3) Characterisation of brittle-ductile deformation processes in a continental context

    Key words: petrology, applied mineralogy, archaeometry, geodynamics

    Latest application date: 2010-07-01

    Financing: available

    Type of Position: scholarship or salary

    Source of Funding: K.U.Leuven FLOF or K.U.Leuven AAP

    Duration of the Project : 4 years

    Research group:

    Remarks: Because of teaching obligations, the candidates are expected to be Dutch speaking. The candidates must document their competence in one of the research domains and clearly express their interest in one or more of the research topics.

    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  5. #15
    ApplyAbroad Hero nima56 آواتار ها
    تاریخ عضویت
    Nov 2008
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    1,468

    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    PhD position in Historical geology and Palaeontology, Marine phytoplankton evolution and climate change

    at the Department of Earth Sciences. Starting date: 15 September 2010 or as agreed upon.
    Unicellular phytoplankton form the base of the marine food chain and play fundamental roles in biogeochemical cycles on Earth. There is growing concern that climate change will disrupt algal productivity and calcification due to rising ocean temperatures and lowering of ocean pH (‘ocean acidification’). However, very little is known about the mechanisms and rates of climatic adaptation by phytoplankton.
    The PhD student will participate in a project, which is a collaboration between Dr Jorijntje Henderiks (Uppsala University) and colleagues at the Centre for Ecological and Evolutionary Synthesis (University of Oslo). We want to understand why different species within a prominent group of marine calcifying algae (the coccolithophores) respond differently to environmental change, and what environmental factor acts as the main influence on algal evolution. This research aims to bridge the gap between short-term experimental observations of living marine algae, and long-term patterns of phenotypic (i.e., size, shape) variability observed in the fossil record.
    The PhD candidate will collect fossil time series data of phenotypic evolution in key lineages using geological samples from various ocean drilling sites. The microfossil data will be paired with reconstructions of past oceanographic and climatic change using geochemical proxy methods. The project offers training in cross-disciplinary research between the fields of geology and biology. Analytical techniques will include (automated) biometry and time series analysis. The fossil analyses will be integrated with parallel–running subprojects that focus on culture experiments and evolutionary modeling.
    The applicant must have a university degree with a strong component of geology and/or biology, with keen interests in (micro)paleontology, marine geology/biology, evolutionary biology, and/or ecology. Experience in biometry and statistical methods as well as knowledge of marine microfossils/phytoplankton are welcomed. Good communication skills and ability to work in a team are essential.
    The holder of a PhD-student position shall primarily devote her/his time to own research studies. Other departmental work, such as educational or administrative can be part of the position (max 20%).The applicant must be eligible for PhD studies. Priority is given to those who are deemed to show the greatest aptitude for a successful completion of graduate studies.
    The rules governing this process can be found in Higher Education Ordinance (Högskoleförordningen) 5 kap §§ 1-7. Local guidelines at Uppsala University determine the salary.
    The application shall consist of CV, copies of exams and list of courses including the grades obtained, a copy of the Master thesis (or a draft thereof), as well as names of two persons that can be used as reference.
    More information can be obtained from Dr. Jorijntje Henderiks, tel. +46-18-471 23 16, jorijntje.henderiks@geo.uu.se. Union representatives are Anders Grundström, Saco-rådet, tel +46-18-471 53 80, Carin Söderhäll, OFR-S/ST, tel +4618-471 19 96, Stefan Djurström, Seko, tel +46-18-471 33 15.
    The application should be sent, preferrably by e-mail to: registrator@uu.se, or by fax +46-18-471 20 00, or by mail to: Registrator, Uppsala University, Box 256, 751 05 UPPSALA, Sweden. In any correspondence, please use the reference number UFV-PA 2010/966. Application deadline on 31 May, 2010.
    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  6. #16
    Junior Member
    تاریخ عضویت
    Oct 2007
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    14

    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    PhD Scholarships at Monash University (Australia)

    An excellent opportunity is offered to work within a nationally recognised
    team at Monash University with excellence in climate science and water
    sensitive cities. You will establish an excellent future in the
    interdisciplinary area of urban climate and sustainability within a large
    program on Cities as Water Supply Catchments. You will be part of a new
    Centre for Water Sensitive Cities (<www.watersensitivecities.org.au>).
    The Projects: We are seeking two highly motivated and enthusiastic students
    with a strong interest in climate science, microclimatology, climate
    modelling, ecosystem services or similar. The project aims to investigate
    the influence of green infrastructure upon the urban microclimate and there
    are three possible areas of study:
    1. Influence of green infrastructure (green roofs, walls, street trees,
    biolfiters) on urban microclimate using observations.
    2. Effectiveness of green infrastructure at household city scale using urban
    modelling.
    3. Valuation of the multiple benefits of green infrastructure in the urban
    environment including heat reduction, carbon sequestration, improved air
    quality, reduced storm water infrastructure and improvements to human
    health.
    World class research support is available for the projects which will be
    based at Monash University's Clayton campus. The project will allow
    interactions with multiple industry partners.

    The Fellowships
    -------------------
    Candidates who have achieved Honours 1 or 2a or equivalent and have an
    enthusiastic interest in any of the research areas detailed above are
    encouraged to apply. Some knowledge of modelling and /or field experience
    would be an advantage. The projects give opportunities to define research
    directions and provide supported independent study. Each PhD student will be
    awarded a research support budget of up to $25, 000 per annum and will work
    collaboratively with the supervision of Assoc. Prof Jason Beringer and Prof.
    Nigel Tapper.
    Applicants should submit a brief statement of practical and academic
    suitability for the proposed research topic, a current curriculum vitae,
    academic transcripts and contact details for two referees. Applications
    close 5pm AEDST Friday 22nd October.

    Enquiries
    -----------
    Assoc. Prof. Jason Beringer on +61 3 9905 9352
    (<jason.beringer@monash.edu.au>)
    Centre for Water Sensitive Cities - <www.watersensitivecities.org.au>
    School of Geography and Environmental Science - <www.arts.monash.edu.au/ges>




    ================================================== =

    Assoc. Prof. Jason Beringer

    School of Geography and Environmental Science
    Room 229, Building 28 (Atmospheric Science, Maths, Geoscience)
    Monash University, Clayton, Victoria Australia, 3800.

    Phone: +61 3 9905 9352
    Fax: +61 3 9905 2948
    Home: +61 9018 7860
    Mobile: 0409 355 496

    Email: jason.beringer@monash.edu.au

    WWW(work): http://www.arts.monash.edu.au/ges/staff/jberinger
    WWW(climate group): http://www.arts.monash.edu.au/ges/research/climate
    WWW(Cities): http://www.watersensitivecities.org.au/

    ================================================== =
    _______________________________________________
    DO NOT REPLY TO THIS EMAIL

    SEND POSTS TO: climlist@wku.edu

    CLIMLIST HOMEPAGE: http://climlist.wku.edu/

  7. #17
    Member BehnoushHajian آواتار ها
    تاریخ عضویت
    Feb 2011
    رشته و دانشگاه
    بیوتکنولوژی، دانشگاه شیراز-دانشگاه بوعلی سینا
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    One or more PhD fellowships are available starting January 2012 in the L.Cademartiri Lab at Iowa State University.
    The broad objective of the lab is to help students and postdocs become independent, creative, and successful problem-solvers, scientists, and professionals.
    This goal will be accomplished by i) pursuing inventive and meaningful research at the boundaries of disciplines, ii) engaging students in the pursuit of technical skills as well as soft skills (e.g. leadership, time management, project management, stress reduction, communication, critical thinking, work ethic).
    The lab will have three major research thrusts:
    1) Plasmas: exploring novel ways to create and use the fourth state of matter in chemistry and materials science. Our goal is to bring plasmas onto the chemistry lab benches. One area of exploration will be in the use of plasmas for the processing and fabrication of novel functional nanomaterials for energy applications.
    2) Soil and Plants: our objective is to contribute to the fight against world hunger and soil erosion, by creating model systems that would allow us to simulate specific aspects of soil and plants and their interactions.
    3) Self-Assembly: our objective is to understand self-assembly at the nanoscale in a systematic manner. We’ll first create new tools for the study of nanoscale self-assembly in a controlled and reproducible fashion.
    Given the diversity of topics we are interested in, we are also interested in candidates from a variety of backgrounds: chemistry, physics, materials science and chemical engineering. While we value the background of a candidate, we are especially interested in people who excel in the following characteristics: the determination to make a difference, passion for science, willingness to learn and explore new things, a rock solid work ethic, and a positive spirit.
    If you are interested in this opportunity (visit cademartirilab.net for more information), please send your complete CV (and have three letters of reference sent separately) to Ludovico Cademartiri at lcademar(at)iastate.edu (please replace (at) with @ before sending)
    من اینجا زاده شدم، که اسب هایش همه بی تابند، دخترانش آرام، من خندیدن با چشمان تر را اینجا آموختم، من زائر دائم این خاکم که زادگاه من است، و عاشق امربر این خاکم که میهن من است، این سرزمین معطر، با آتش و خشم و گناه و درد، سرزمین مقدس من است...

  8. #18
    Junior Member
    تاریخ عضویت
    Oct 2007
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    75

    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    MS Assistantship in Water Quality

    A graduate assistantship is available in the Cooperative Research Programs of Lincoln University, Jefferson City, Missouri, to support a motivated student to pursue a Master degree in Environmental Science and to participate in a USDA-NIFA funded research project. The research is mainly involved with development, evaluation, and use of DNA-based approaches for identification of the sources of E.coli in feces-contaminated water. Applicant should have a bachelor’s degree in biology, microbiology, environmental sciences or a closely related field.

    If interested, please send a cover letter indicating your research interests, resume, university transcripts, and names and contact information of three references to Dr. Zhen at zhengg@lincolnu.edu

  9. #19
    Senior Member krig1960 آواتار ها
    تاریخ عضویت
    Jan 2010
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    914

    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    GLIER/Earth and
    Environmental Science:
    Environmental Biogeochemistry


    Asst. Prof. C. Weisener's Research Interests Include:

    Contaminant stress on ecosystems in changing global environments; Environmental tracers; applied biogeochemistry. My research addresses a central theme which links multidisciplinary research involving metal and nutrient cycling and microbial influences on contaminant dynamics and biomineralization in terrestrial and aquatic systems.http://www.uwindsor.ca/glier/chris-weisener

    PhD/MSc. Projects: Oil Sands Biogeochemistry

    Students interested in interdisciplinary environmental research. This research program involves several graduate projects (2 PhD positions and 1 MSc) focused on rehabilitation efforts within the Alberta Oil sands. Several research themes will investigate the biological and physico-chemical controls and modeling of the elemental cycling(C, N Fe and S) occurring in end pit lakes and wetlands. Elemental cycling and there evolution in to sustainable ecosystems has been linked to several redox dominated reactions catalyzed by microorganism. This research addresses fundamental and novel processes occurring during the evolution of these rehabilitated systems. Other research themes will characterize novel chemical treatment methods and investigate their toxicological impact on biodegradation and sequestration of pollutants in oil sand treated wastes. In addition there are several fundamental toxicological studies depending on the student's individual interest with in the Great lakes basin and international locations. Preference will be given to enthusiastic applicants with a strong interest and/or strengths in analytical chemistry, environmental chemistry, molecular microbiology, toxicology, geochemistry (stable isotopes/aqueous), superior academic credentials and strong communication skills. Experience in, GCMS, IC, electrochemistry, molecular microbial identification (using novel T-rflp analysis and qPCR, FISH); laboratory microbiology and/or novel stable isotopes is advantageous. Students will be exposed to advanced geochemical analytical methods development, the use of sophisticated microscopy techniques (confocal laser scanning microscopy, CARD-FISH, MAR-FISH and high-resolution TEM) and state of the art laboratories at the institutes.
    Please Contact: Dr. Christopher G. Weisener, weisener@uwindsor.ca; University of Windsor, 401 Sunset Ave. Windsor ON. N9B 3P4. Interested applicants can contact me to discuss potential options enrolling in either the GLIER or Earth and Environmental Science graduate programs in Winter and Spring 2013.
    Deadline for winter enrollment applications is September 1st, 2012.
    The Great Lakes Institute for Environmental Research (GLIER) of the University of Windsor supports a multi-disciplinary research team focused on studying the impact of multiple stressors on aquatic ecosystems. It is dedicated to the management of the earth's resources to protect and maintain human and environmental health. GLIER is located in world-class facilities on the Detroit River at the University of Windsor. These facilities consist of fully equipped state of the art analytical laboratories for both trace organics and metals, an applied molecular genetics analysis facility, a toxicology laboratory specializing with in vitro assays, an ecology laboratory with a full-service aqua-research center and an environmental modeling facility.

    سلام دوستان، متاسفانه من نمیرسم تاپیکهای اینجا رو چک کنم، ضمن این که خیلی وقته اطلاعاتم به روز نیست، لطفاً سوالاتتون رو به صورت پیام خصوصی برای من نفرستین چون نمیتونم پاسختون رو بدم، با سپاس.

  10. #20
    Senior Member krig1960 آواتار ها
    تاریخ عضویت
    Jan 2010
    ارسال‌ها
    914

    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور







    PhD Thesis in Geomicrobiology


    The research group for Geomicrobiology at the Institute for Geosciences at the University of Tübingen is looking for a PhD student working for 3 years on
    'Microbial and diagenetic origins of Fe minerals in Precambrian Banded Iron Formations'
    Banded Iron Formations (BIFs) are Precambrian, sedimentary deposits consisting of iron minerals and silicates that were deposited during a time of major changes in Earth atmosphere and biosphere. Understanding the mechanisms of BIF deposition therefore allows a better understanding of the earliest evolution of life and geochemical conditions on our planet. The deposition of BIFs is traditionally explained by a chemical oxidation of Fe(II) by cyanobacterial O2 and precipitation of Fe(III) minerals. However, there is increasing evidence that for the formation of the oldest BIFs, O2-independent mechanisms are necessary and that photoautotrophic Fe(II)-oxidizing bacteria could have fulfilled this function. As a consequence, Fe minerals in association with cell organic matter would be deposited at the seafloor.
    The long term diagenetic fate of such cell-mineral aggregates is unknown and is will be the primary question of the PhD candidate. Our approach involves cultivation of Fe(II)-oxidizing bacteria in the presence of high silicate concentrations simulating Precambrian oceans. The precipitates will be treated in high-pressure autoclaves and the mineralogy and trace metal distribution will be analyzed and compared to BIF samples collected in South Africa and Canada. The project will also quantify the partition coefficients for biologically essential trace elements in BIF minerals. The goals of the project are i) to elucidate the primary or diagenetic origin of BIF mineral assemblages based on experimentally-constrained textures and associations of diagenetic minerals and ii) to constrain biological activity at the time of BIF deposition by determining the trace metal concentration and distribution in Precambrian seawater and BIFs.
    The candidate will work in collaboration with researchers from Canada and the US and will have the opportunity to present her/his results in international journals and at international conferences.
    We are offering a PhD position in an interdisciplinary, international, young and dynamic team of microbiologists, geochemists and geoscientists. This position provides an opportunity for the candidate to work at where various fields of science converge, to be creative, and to challenge themselves. Ideal candidates have a solid background in geochemistry and/or geosciences and are interested in geomicrobiology. Applicants must have the ability to work in a team, have good management and communication skills and should be highly motivated and committed to pursuing interdisciplinary research. Good computer and language skills (English) are necessary.
    The start date can be July 1st or as soon as possible thereafter. The employment (TVL E13, 50%) will be arranged by the administration of the University of Tübingen. Disabled persons will be preferred in case of equal qualification
    Applications should be sent by email before May 30th to: Prof. Dr. Andreas Kappler, Geomicrobiology group, Center for Applied Geosciences, University of Tübingen Sigwartstrasse 10, D-72076 Tübingen, Germany, Phone: ++49-7071-2974992 Email: andreas.kappler@uni-tuebingen.de
    More information including recent publications on the advertised PhD topic can be found on our website:http://www.geo.uni-tuebingen.de/arbe...obiologie.html


    سلام دوستان، متاسفانه من نمیرسم تاپیکهای اینجا رو چک کنم، ضمن این که خیلی وقته اطلاعاتم به روز نیست، لطفاً سوالاتتون رو به صورت پیام خصوصی برای من نفرستین چون نمیتونم پاسختون رو بدم، با سپاس.

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