Adoption of Genetically Improved Crops Ucts to Date Have Been Developed by the Private Sector
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Anaerobic Reductive Bioleaching of Manganese Ores
Michigan Technological University Digital Commons @ Michigan Tech Dissertations, Master's Theses and Master's Reports 2021 Anaerobic Reductive Bioleaching of Manganese Ores Neha Sharma Michigan Technological University, [email protected] Copyright 2021 Neha Sharma Recommended Citation Sharma, Neha, "Anaerobic Reductive Bioleaching of Manganese Ores", Open Access Master's Thesis, Michigan Technological University, 2021. https://doi.org/10.37099/mtu.dc.etdr/1200 Follow this and additional works at: https://digitalcommons.mtu.edu/etdr Part of the Chemical Engineering Commons, and the Metallurgy Commons ANAEROBIC REDUCTIVE BIOLEACHING OF MANGANESE ORES By Neha Sharma A THESIS Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE In Chemical Engineering MICHIGAN TECHNOLOGICAL UNIVERSITY 2021 © 2021 Neha Sharma This thesis has been approved in partial fulfillment of the requirements for the Degree of MASTER OF SCIENCE in Chemical Engineering. Department of Chemical Engineering Thesis Advisor: Timothy C. Eisele Committee Member: Rebecca G. Ong Committee Member: Lei Pan Department Chair: Pradeep K. Agrawal Table of Contents List of Figure...................................................................................................................... iv List of Tables .......................................................................................................................v Acknowledgements ........................................................................................................... -
Bioleaching of Chalcopyrite
Bioleaching of chalcopyrite By Woranart Jonglertjunya A thesis submitted to The University of Birmingham For the degree of DOCTOR OF PHILOSOPHY Department of Chemical Engineering School of Engineering The University of Birmingham United Kingdom April 2003 University of Birmingham Research Archive e-theses repository This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. Abstract This research is concerned with the bioleaching of chalcopyrite (CuFeS2) by Thiobacillus ferrooxidans (ATCC 19859), which has been carried out in shake flasks (250 ml) and a 4-litre stirred tank bioreactor. The effects of experimental factors such as initial pH, particle size, pulp density and shake flask speed have been studied in shake flasks by employing cell suspensions in the chalcopyrite concentrate with the ATCC 64 medium in the absence of added ferrous ions. The characterisation of T. ferrooxidans on chalcopyrite concentrate was examined by investigating the adsorption isotherm and electrophoretic mobility. Subsequently, a mechanism for copper dissolution was proposed by employing relevant experiments, including the chemical leaching of chalcopyrite by sulphuric acid and ferric sulphate solutions, bioleaching of chalcopyrite in the presence of added ferric ions, and cell attachment analysis by scanning electron microscopy. -
Weatherhead Center for International Affairs
WEATHERHEAD CENTER FOR INTERNATIONAL AFFAIRS H A R V A R D U N I V E R S I T Y two2004-2005 thousand four – two thousand five ANNUAL REPORTS two2005-2006 thousand five – two thousand six 1737 Cambridge Street • Cambridge, MA 02138 www.wcfia.harvard.edu TABLE OF CONTENTS INTRODUCTION 2 PEOPLE Visiting Committee 4 Executive Committee 4 Administration 6 RESEARCH ACTIVITIES Small Grants for Faculty Research Projects 8 Medium Grants for Faculty Research Projects 9 Large Grants for Faculty Research Projects 9 Large Grants for Faculty Research Semester Leaves 9 Distinguished Lecture Series 11 Weatherhead Initiative in International Affairs 12 CONFERENCES 13 RESEARCH SEMINARS Challenges of the Twenty-First Century 34 Communist and Postcommunist Countries 35 Comparative Politics Research Workshop 36 Comparative Politics Seminar 39 Director’s Faculty Seminar 39 Economic Growth and Development 40 Harvard-MIT Joint Seminar on Political Development 41 Herbert C. Kelman Seminar on International Conflict Analysis and Resolution 42 International Business 43 International Economics 45 International History 48 Middle East 49 Political Violence and Civil War 51 Science and Society 51 South Asia 52 Transatlantic Relations 53 U.S. Foreign Policy 54 RESEARCH PROGRAMS Canada Program 56 Fellows Program 58 Harvard Academy for International and Area Studies 65 John M. Olin Institute for Strategic Studies 74 Justice, Welfare, and Economics 80 Nonviolent Sanctions and Cultural Survival 82 Religion, Political Economy, and Society 84 Student Programs 85 Transnational Studies Initiative 95 U.S.-Japan Relations 96 PUBLICATIONS 104 ANNUAL REPORTS 2004–2005 / 2005–2006 - 1 - INTRODUCTION In August 2005, the Weatherhead Center moved In another first, the faculty research semester to the new Center for Government and leaves that the Center awarded in spring 2005 International Studies (CGIS) complex. -
Consideration of Influential Factors on Bioleaching of Gold Ore Using Iodide-Oxidizing Bacteria
minerals Article Consideration of Influential Factors on Bioleaching of Gold Ore Using Iodide-Oxidizing Bacteria San Yee Khaing 1, Yuichi Sugai 2,*, Kyuro Sasaki 2 and Myo Min Tun 3 1 Department of Earth Resources Engineering, Graduate School of Engineering, Kyushu University, Fukuoka 8190395, Japan; [email protected] 2 Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 8190395, Japan; [email protected] 3 Department of Geology, Yadanabon University, Mandalay 05063, Myanmar; [email protected] * Correspondence: [email protected] Received: 11 April 2019; Accepted: 30 April 2019; Published: 2 May 2019 Abstract: Iodide-oxidizing bacteria (IOB) oxidize iodide into iodine and triiodide which can be utilized for gold dissolution. IOB can be therefore useful for gold leaching. This study examined the impact of incubation conditions such as concentration of the nutrient and iodide, initial bacterial cell number, incubation temperature, and shaking condition on the performance of the gold dissolution through the experiments incubating IOB in the culture medium containing the marine broth, potassium iodide and gold ore. The minimum necessary concentration of marine broth and potassium iodide for the complete gold dissolution were determined to be 18.7 g/L and 10.9 g/L respectively. The initial bacterial cell number had no effect on gold dissolution when it was 1 104 cells/mL or higher. Gold × leaching with IOB should be operated under a temperature range of 30–35 ◦C, which was the optimal temperature range for IOB. The bacterial growth rate under shaking conditions was three times faster than that under static conditions. -
Experiences and Future Challenges of Bioleaching Research in South Korea
minerals Review Experiences and Future Challenges of Bioleaching Research in South Korea Danilo Borja 1, Kim Anh Nguyen 1, Rene A. Silva 2, Jay Hyun Park 3, Vishal Gupta 4, Yosep Han 1, Youngsoo Lee 1,* and Hyunjung Kim 1,* 1 Department of Mineral Resources and Energy Engineering, Chonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju, Jeonbuk 54896, Korea; [email protected] (D.B.); [email protected] (K.A.N.); [email protected] (Y.H.) 2 Department of Process Engineering, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John’s, NL A1B 3X5, Canada; [email protected] 3 Geotechnics and Recycling Technology Division, Institute of Mine Reclamation Corporation, 2, Segye-ro, Wonju-si, Gangwon-do 26464, Korea; [email protected] 4 Research & Development, EP Minerals, 9785 Gateway Dr., Suite 1000, Reno, NV 89521, USA; [email protected] * Correspondence: [email protected] (Y.L.); [email protected] (H.K.); Tel.: +82-63-270-2392 (Y.L.); +82-63-270-2370 (H.K.); Fax: +82-63-270-2366 (Y.L. & H.K.) Academic Editor: Anna H. Kaksonen Received: 1 October 2016; Accepted: 28 November 2016; Published: 2 December 2016 Abstract: This article addresses the state of the art of bioleaching research published in South Korean Journals. Our research team reviewed the available articles registered in the Korean Citation Index (KCI, Korean Journal Database) addressing the relevant aspects of bioleaching. We systematically categorized the target metal sources as follows: mine tailings, electronic waste, mineral ores and metal concentrates, spent catalysts, contaminated soil, and other materials. -
Steven H. Strauss 21 December 2018
CV STEVEN H. STRAUSS 21 DECEMBER 2018 Distinguished Professor of Forest Biotechnology Phone: 541/737-6578 Department of Forest Ecosystems and Society Fax: 541/737-1393 Oregon State University Email: [email protected] Corvallis, Oregon, USA 97331-5752 Born: November 28, 1955 Home page / TBGRC Coop / Posters-Presentations PROFESSIONAL EXPERIENCE 7/09-present Distinguished Professor, Oregon State University 1/18-present Graduate Faculty, Environmental Sciences 1/18-present Graduate Faculty, Environmental Sciences 3/14 Visiting Scientist, Scion (Forest Biotechnology), New Zealand 11/04-12/13 Director, Outreach in Biotechnology, Oregon State University 2003-2012 Editor, New Phytologist 7/95-present Professor, Forest Ecosystems and Society; Molecular & Cellular Biology 1/01-4/01 Visiting Senior Fellow, Linacre College, Oxford University, UK 1/01-4/01 Visiting Scientist, Department of Plant Science, Oxford Forestry Institute , UK 7/90-6/95 Associate Professor, Department of Forest Science, OSU 7/94-present Director, Tree Genomics and Biosafety Research Cooperative, OSU 7/99-6/04 Director, National Science Foundation Center for Tree Genetics (Industry/University Cooperative Research Centers Program) 6/93-8/93 Visiting Scientist, INRA, Versailles & Orleans, France 9/91-6/92 Visiting Professor, Australian National University, Canberra, Australia 9/91-6/92 Visiting Scientist, CSIRO Division of Plant Industry, Canberra, Australia 6/90-7/90 Visiting Scientist, Department of Botany, Tromsø University, Norway 7/85-6/90 Assistant Professor, Department of Forest Science and Genetics Program, OSU 7/85-9/85 Visiting Scientist, US Forest Service, Berkeley, California (Sederoff laboratory) EDUCATION Ph.D. 1985 University of California at Berkeley, Forest Resources (Genetics) M.F.S. -
Technological Abundance for Global Agriculture: the Role of Biotechnology
Technological Abundance for Global Agriculture: The Role of Biotechnology The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Juma, Calestous. 2012. Technological Abundance for Global Agriculture: The Role of Biotechnology. HKS Faculty Research Working Paper Series RWP12-008, John F. Kennedy School of Government, Harvard University. Published Version http://web.hks.harvard.edu/publications/workingpapers/ citation.aspx?PubId=8244 Citable link http://nrs.harvard.edu/urn-3:HUL.InstRepos:8506827 Terms of Use This article was downloaded from Harvard University’s DASH repository, and is made available under the terms and conditions applicable to Other Posted Material, as set forth at http:// nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of- use#LAA Technological Abundance for Global Agriculture: The Role of Biotechnology Faculty Research Working Paper Series Calestous Juma Harvard Kennedy School March 2012 RWP12-008 The views expressed in the HKS Faculty Research Working Paper Series are those of the author(s) and do not necessarily reflect those of the John F. Kennedy School of Government or of Harvard University. Faculty Research Working Papers have not undergone formal review and approval. Such papers are included in this series to elicit feedback and to encourage debate on important public policy challenges. Copyright belongs to the author(s). Papers may be downloaded for personal use only. www.hks.harvard.edu TECHNOLOGICAL ABUNDANCE FOR GLOBAL AGRICULTURE: The Role of Biotechnology8 Calestous Juma Introduction Science and innovation have always been the key forces behind agricultural growth in particular and economic transformation in general. -
Artificial Intelligence As a Dual-Use Technology Éva AMBRUS1
AARMS Vol. 19, No. 2 (2020) 19–28. 10.32565/aarms.2020.2.2 Artificial Intelligence as a Dual-use Technology Éva AMBRUS1 The aim of this article is to give an overview of the state of artificial intelligence regarding malware attacks, its uses in the military and views regarding if it should be classified as a dual-use technology. As an emerging technology, with a wide variety of use and capabilities, more could be done to overview its uses, and some form of control over it. While the classical exports control might be counterproductive, a more closed approach towards critical information dissemination might be advisable until the full range of capabilities of artificial intelligence will be known. Keywords: artificial intelligence, dual-use technology, military use, malware Introduction The security paradigm is changing. Until a new definition comes forward, policy-makers, academia and users will debate its nature and possible effects. Asymmetrical warfare, hybrid warfare, ‘grey area’ warfare, (dis)information warfare, unpeace are just a few names used trying to pinpoint the development of (IT) technology on security. Warfare and security includes more and more cyberspace, including cyber weapons, cyber espionage and cybersecurity. One driver of this change is the advances made in the last decade regarding artificial intelligence (AI). In this article I will present the idea that AI should be classified as a dual-use technology, meaning that it can be used for both civilian and military applications. I will start with presenting where AI weapons are today, followed by the nature of the relationship between state and technology. -
Engineering Change – Towards a Sustainable Future in the Developing
Engineering Change Towards a sustainable future in the developing world Edited by Peter Guthrie, Calestous Juma and Hayaatun Sillem Engineering Change Towards a sustainable future in the developing world Edited by: Professor Peter Guthrie OBE FREng Professor of Engineering for Sustainable Development Centre for Sustainable Development Department of Engineering, University of Cambridge Professor Calestous Juma HonFREng FRS Professor of the Practice of International Development Belfer Center for Science and International Affairs Kennedy School of Government, Harvard University Dr Hayaatun Sillem International Manager The Royal Academy of Engineering Consultant editor: Ian Jones, Director, Isinglass Consultancy Ltd Published: October 2008 ISBN No: 1-903496-41-1 Engineering Change Towards a sustainable future in the developing world Table of Contents Foreword 3 Engineering a better world 5 Calestous Juma Profile: Rajendra K Pachauri 11 Engineering growth: Technology, innovation and policy making in Rwanda 13 Romain Murenzi and Mike Hughes Water and waste: Engineering solutions that work 21 Sandy Cairncross Globalising innovation: Engineers and innovation in a networked world 25 Gordon Conway Profile: Dato Lee Yee-Cheong 32 Engineering, wealth creation and disaster recovery: The case of Afghanistan 35 M Masoom Stanekzai and Heather Cruickshank Untapped potential: The role of women engineers in African development 41 Joanna Maduka Scarce skills or skills gaps: Assessing needs and developing solutions 47 Allyson Lawless Profile: Irenilza de Alencar -
The Environmental Ethics of Domestication
The Environmental Ethics of Domestication when biotechnology reframes nature by Samantha McLean, BAppSc (Hons) Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy School of Geography and Environmental Studies University of Tasmania December 2008 Declaration of Originality This thesis contains no material which has been accepted for the award of any other degree or diploma in any university or other tertiary institution and, to the best of my knowledge and belief, contains no material previously published or written by another person, except where due reference has been made in the text. amantha McLean Statement of Authority of Access This thesis may be made available for loan and limited copying in accordance with the Copyright Act 1968. Abstract Controversies about genetic engineering in agriculture mobilise the concept of nature in ways that reframe nature with significant conceptual implications for the field of environmental ethics. The political economy and regulatory environment of genetic engineering excludes non- technical, non-expert and non-market perspectives in official assessments of biotechnological risk, but broader public conceptions of risk include philosophical concerns about the implications of genetic engineering for nature. Critical attention to the philosophical substance of these concerns is moderated by the conceptual ambiguity of their articulation in terms of unnaturalness and the ubiquity of other rhetorical appeals to nature as a source of precedence, legitimacy and morality. These discourses of naturalness are primarily concerned with whether genetic engineering represents a significant departure from conventional and traditional crop breeding practices or merely their continuation. This tension is seen in contrasting visions of biotechnology as either evolutionary or revolutionary and is resolved by recourse to particular narratives of domesticatory, evolutionary and cultural histories. -
Por Uma Sociologia Pública*
ISSN 0104-8015 POLÍTICA & TRABALHO Revista de Ciências Sociais9 n. 25 Outubro de 2006 - p. 9-50 POR UMA SOCIOLOGIA PÚBLICA* Michael Burawoy1 Esta é a forma como se representa o anjo da história. Sua face está virada para o passado. Onde nós percebemos uma cadeia de eventos, ele vê uma catástrofe única que se mantém empilhando destroços e os lança violentamente em frente aos seus pés. O anjo gostaria de ficar, acordar os mortos, e tornar inteiro o que foi esmagado. Mas um temporal está vindo do paraíso; ele foi capturado em suas asas com tal violência que não pode mais fechá-las. Este temporal o empurra irresistivelmente para o futuro para o qual ele volta as costas, enquanto que a pilha de entulhos à sua frente cresce em direção ao céu. Esse temporal é o que chamamos de progresso. (Walter Benjamin, 1940) Walter Benjamin escreveu sua famosa nona tese sobre a filosofia da história quando o exército nazista se aproximava de sua amada Paris, santuário sagrado da promessa civilizatória. Ele retrata essa promessa na trágica figura do anjo da história, batalhando em vão contra a longa marcha da civilização através da destruição. Para Benjamim, em 1940, o futuro nunca tinha parecido mais desolador com o capitalismo-transformado-em-fascismo num pacto com o socialismo-transformado-em-estalinismo para ocupar2 o mundo. Hoje, no alvorecer do século XXI, embora o comunismo tenha se dissolvido e o fascismo seja uma * Palestra de abertura da Associação Americana de Sociologia - 2004. Artigo publicado originalmente na American Sociological Review Vol.70, no.1, February 2005, pp.4-28. -
Review on Chromobacterium Violaceum for Gold Bioleaching from E-Waste
Available online at www.sciencedirect.com ScienceDirect Procedia Environmental Sciences 31 ( 2016 ) 947 – 953 The Tenth International Conference on Waste Management and Technology (ICWMT) Review on chromobacterium violaceum for gold bioleaching from e-waste Renjie Liua, Jingying Lia,*, Zhongying Gea aCollege of Environment and Safety Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China Abstract Electronic waste, such as printed circuit boards, are an important secondary resource if processed with environment-friendly technologies for obtaining precious metal, such as gold. The gold bioleaching from electronic waste was recently getting paid attractive attention because its available deposit is limited. This review was focused on Chromobacterium violaceum (C. Violaceum), which was a mesophilic, gram-negative, and facultative anaerobe. C. violaceum has the ability of producing CN- which can dissolve gold from the metallic particles of crushed waste printed circuit boards. This article also provided an overview of cyanide-generation mechanism and the optimal conditions for C. violaceum to achieve maximum amount of cyanide generation. The past achievements and recently scenario of recovery studies carried out on the use of some other microorganisms were compared with C. violaceum. And recently some researchers proposed that combined C. violaceum with chemical methods or other mechanism such as iodide, Pseudomonas aeruginosa and Pseudomonas fluorescens which can reinforce the cyanide generation and improve gold-leaching efficiency. The factors affected the microorganisms on cyanide generation were summarized and the proper conditions were also discussed in this article. And present researches of C. violaceum in gold bioleaching had made good progress which the reported leaching efficiency of gold was over 70%.