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Sample records for arnager limestone denmark

  1. Diagenesis of silica-rich mounded chalk, the Coniacian Arnager Limestone, Denmark

    DEFF Research Database (Denmark)

    Buus Madsen, Heine; Stemmerik, Lars; Surlyk, Finn

    2010-01-01

    The Coniacian Arnager Limestone Formation is exposed on the Danish island of Bornholm in the Baltic Sea. It is composed of mound-bedded siliceous chalk, and X-ray diffraction and scanning electron microscopy indicate a content of 30-70% insoluble minerals, including authigenic opal-CT, quartz......, clinoptilolite, feldspars, calcite, dolomite, and barite. Opal-CT and clinoptilolite are the most common and constitute 16-53% and 2-9%, respectively. The content of insoluble minerals varies laterally bothwithinthemounds and inplanar beds, and the opal-CT content varies by up to 10% vertically. Themounds...... precipitation of opal-CT. The opal-CT formed at temperatures around 17°C, the precipitation lowered the silica activity and the Si/Al ratio of the pore water, resulting in precipitation of clinoptilolite, feldspar and smectite. Calcite formed synchronouslywith the latest clinoptilolite.Minoramounts of quartz...

  2. Image Analysis and Estimation of Porosity and Permeability of Arnager Greensand, Upper Cretaceous, Denmark

    DEFF Research Database (Denmark)

    Solymar, Mikael; Fabricius, Ida

    1999-01-01

    Arnager Greensand consists of unconsolidated, poorly sorted fine-grained, glauconitic quartz sand, often silty or clayey, with a few horizons of cemented coarse-grained sand. Samples from the upper part of the Arnager Greensand were used for this study to estimate permeability from microscopic...... images. Backscattered Scanning Electron Microscope images from polished thin-sections were acquired for image analysis with the software PIPPIN(R). Differences in grey levels owing to density differences allowed us to estimate porosity, clay and particle content. The images were simplified into two...

  3. Face logging in Copenhagen Limestone, Denmark

    DEFF Research Database (Denmark)

    Jakobsen, Lisa; Foged, Niels Nielsen; Erichsen, Lars

    2015-01-01

    tunnel in Copenhagen more than 2.5 km face logs were made in 467 locations at underground stations, shafts, caverns and along bored tunnels. Over 160 geotechnical boreholes, many with geophysical logging were executed prior to construction works. The bedrock consists of Paleogene "Copenhagen limestone......The requirement for excavation support can be assessed from face logging. Face logs can also improve our knowledge of lithological and structural conditions within bedrock and supplement information from boreholes and geophysical logs. During the construction of 8 km metro tunnel and 4 km heating....... The induration degrees recorded in face logs and boreholes are compared and correlated. Distinct geophysical log markers are used to divide the limestone into three units. These marker horizons are correlated between face logs and geotechnical boreholes. A 3D model of the strength variations recorded within...

  4. COPROLITES FROM THE DANIAN LIMESTONE (LOWER PALEOCENE) OF FAXE QUARRY, DENMARK

    DEFF Research Database (Denmark)

    Milàn, Jesper

    2010-01-01

    are attributed to sharks, and large, cylindrical coprolites with longitudinal striations on the surface are identified as crocodile coprolites. Fish and sharks are known from abundant finds of otoliths and teeth in Faxe Quarry, and crocodiles are known from finds of single bones and teeth.......A collection of coprolites found in the Danian (Lower Paleocene) limestone of Faxe Quarry, Denmark, is described and attributed to the respective producers. Small, drop-like specimens with weak signs of spiral coiling are attributed to fish. Larger, heteropolar, spirally-coiled specimens...

  5. The fate of a middle Danian (Lower Paleocene) turtle from the bryozoan limestone of Faxe Quarry, Denmark

    DEFF Research Database (Denmark)

    Milàn, Jesper; Lindow, Bent Erik Kramer; Lauridsen, Bodil Wesenberg

    A piece of turtle carapace from the Middle Danian bryozoan limestone at the Faxe quarry, eastern Denmark, is identified as a partial coastal plate from the carapace of a chelonioid turtle. In addition to being the first record of turtles from the Middle Danian of Denmark, the fragment bears evide....... Smaller groups of parallel scrapes, 4-5mm long and 0.5mm, wide are interpreted as bite traces from sharks, and small circular traces, only 1mm in diameter, found either solitary or in a row of three, are interpreted as scavenging traces from fish....

  6. Bite traces in a turtle carapace fragment from the middle Danian (Lower Paleocene) bryozoan limestone, Faxe, Denmark

    DEFF Research Database (Denmark)

    Milan, Jesper; Lindow, Bent Erik Kramer; Lauridsen, Bodil Wesenberg

    2011-01-01

    A fragment of a turtle carapace from the Middle Danian bryozoan limestone at the Faxe quarry, eastern Denmark, is identified as a partial costal plate from the carapace of a chelonioid turtle. The fragment bears traces of three separate acts of predation or scavenging. Two circular bite traces Ni...... either alone or in a row of three, are either from sharks or fish. This is the first record of turtles from the Danian bryozoan limestone exposed in Faxe....... Nihilichnus nihilicus Mikuláš et al. 2006, 4 mm in diameter, situated 2.5 cm apart, are interpreted as crocodylian. Groups of parallel scrapes, Machichnus bohemicus Mikuláš et al. 2006, 4–5 mm long and 0.5 mm wide, are interpreted as bite traces from sharks. Small circular traces, ~1 mm in diameter, found...

  7. Denmark

    DEFF Research Database (Denmark)

    Munkholm, Natalie Videbæk

    2015-01-01

    The chapter explains the legal framework concerning transgender and transsexual persons in Denmark, statistics, the procedures and requirements for changing legal sex and/or gender, the legal consequences of the changes as regards rights and duties of the person, and the legal challenges of the r......The chapter explains the legal framework concerning transgender and transsexual persons in Denmark, statistics, the procedures and requirements for changing legal sex and/or gender, the legal consequences of the changes as regards rights and duties of the person, and the legal challenges...

  8. Denmark

    DEFF Research Database (Denmark)

    Lund, Joachim

    2018-01-01

    In Denmark the public debate on media ethics and accountability has seen an all-time high in recent years, culminating, in 2013, with an update of the common and institutionalised guidelines for press ethics. As recently as the summer 2014, in light of a media hacking scandal, the politicians again...

  9. Denmark

    DEFF Research Database (Denmark)

    Storgaard, Anette

    2017-01-01

    the chapter is a thorough presentation of the legal positions of children and juvenile offenders in Denmark including procedural as well as material law and practises. The contemporary tense debate on legal rights and consequences is presented and debated critically. Included is also a discussion...... of the role of the age for criminal liability....

  10. Denmark

    DEFF Research Database (Denmark)

    Adrian, Lin

    2014-01-01

    and extracts some key factors underpinning the effective whole-of-government and whole-of-society efforts. It then considers experiences of several nations – Denmark, Finland, The Netherlands and Sweden – in building integrated security and defence systems. Finally, the paper investigates the ‘state of play...

  11. Denmark

    DEFF Research Database (Denmark)

    Holst, Nicolaj Sivan; Henricson, Ib Lennart

    2015-01-01

    The chapter explains the legal framework concerning transgender and transsexual persons in Denmark, statistics, the procedures and requirements for changing legal sex and/or gender, the legal consequences of the changes as regards rights and duties of the person, and the legal challenges of the r...

  12. Denmark

    DEFF Research Database (Denmark)

    Madsen, Peter Hauge; Bjerregaard, E.; Lemming, Jørgen Kjærgaard

    2004-01-01

    After a theoretical outset (Rhodes), the author gives an overview of the Danish regions (history, place in the national / EU-system, administrative organisation), followed by discussions of the intra-regional relations (incl. degree of Europeanisation, local - regional cooperation), the relations...... to the national centre and the supranational centre. This is followed bu a conclussion in which it i.a. is stated, that the proces of Europeanization has streangthned the Dansh regions within Denmark, and that the regions do nt have any federal aspirations....

  13. High Resolution Hydraulic Profiling and Groundwater Sampling using FLUTe™ System in a Fractured Limestone Setting

    DEFF Research Database (Denmark)

    Janniche, Gry Sander; Christensen, Anders G.; Grosen, Bernt

    challeng-ing in deposit types as fractured limestone. The activities of a bulk distribution facility for perchloroe-thene (PCE) and trichloroethene (TCE) at the Naverland site near Copenhagen, Denmark, has resulted in PCE and TCE DNAPL impacts to a fractured clay till and an underlying fractured limestone...

  14. Direct Sulfation of Limestone

    DEFF Research Database (Denmark)

    Hu, Guilin; Dam-Johansen, Kim; Wedel, Stig

    2007-01-01

    The direct sulfation of limestone was studied in a laboratory fixed-bed reactor. It is found that the direct sulfation of limestone involves nucleation and crystal grain growth of the solid product (anhydrite). At 823 K and at low-conversions (less than about 0.5 %), the influences of SO2, O-2...... and CO2 on the direct sulfation of limestone corresponds to apparent reaction orders of about 0.2, 0.2 and -0.5, respectively. Water is observed to promote the sulfation reaction and increase the apparent reaction orders of SO2 and O-2. The influence of O-2 at high O-2 concentrations (> about 15...... %) becomes negligible. In the temperature interval from 723 K to 973 K, an apparent activation energy of about 104 kJ/mol is observed for the direct sulfation of limestone. At low temperatures and low conversions, the sulfation process is most likely under mixed control by chemical reaction and solid...

  15. Postcolonial Denmark

    DEFF Research Database (Denmark)

    Jensen, Lars

    2016-01-01

    restoration programs are and have been conducted in all former Danish tropical colonies. In Greenland, Denmark is using its sovereignty to boost its international status as part of the Arctic council, as a scientific power centre on Polar/Arctic research – not least in relation to climate change. The article...... Denmark's postcolonial condition, that is, it identifies issues in contemporary Denmark deriving from Danish (and European) colonialism's aftermath. This unfinished business includes contemporary historiography of the migrant other in Danish society, refugee discourse in the public domain, the early...

  16. Globalizing Denmark

    DEFF Research Database (Denmark)

    Selmer, Jan; Lauring, Jakob

    2013-01-01

    countries to keep up the process of globalization may be substantial, and the economic gains for such countries from adjusting to a more internationally integrated world economy are clear. However, in small- population economies, especially social-democratic welfare states, the internal pressure......This exploratory article examines the paradox of being open-minded while ethnocentric as expressed in Danish international management practices at the micro level. With a population of 5.4 million, Denmark is one of the smallest of the European countries. The pressure on many small advanced...... to integrate counteracts to some extent the need to maintain openness to differences. Thus, a strong economy and a feeling of smug ethnocentrism in Denmark generate a central paradox in thinking about internationalization in Danish society....

  17. Limestone valib eetilisi firmasid / Virge Lahe

    Index Scriptorium Estoniae

    Lahe, Virge

    2008-01-01

    Endised Hansapanga investeerimisfondide analüütikud hakkavad läbi Limestone fondide pakkuma sotsiaalselt vastutustundlikku investeerimist (Socially Responsible Investing). Kommenteerivad Art Lukas ja Silver Vohu. Vt. samas: Limestone Investment Management AS

  18. CALCIUM CARBONATE DISSOLUTION RATE IN LIMESTONE CONTACTORS

    Science.gov (United States)

    The rate of carbonate mineral dissolution from limestone was studied using a rotating disk apparatus and samples of limestone of varied composition. The purpose of this study was to determine the effect of limestone composition on the kinetics of carbonate mineral dissolution. Th...

  19. Buddhism in Denmark

    DEFF Research Database (Denmark)

    Borup, Jørn

    2008-01-01

    Introductory article on Buddhism in Denmark following historial lines and typological divides between "ethnic" and "convert" Buddhism.......Introductory article on Buddhism in Denmark following historial lines and typological divides between "ethnic" and "convert" Buddhism....

  20. Prostate cancer in Denmark

    DEFF Research Database (Denmark)

    Brasso, K; Friis, S; Kjaer, S K

    1998-01-01

    To review the trends in prostate cancer (PC) incidence and mortality rates in Denmark during a 50-year period.......To review the trends in prostate cancer (PC) incidence and mortality rates in Denmark during a 50-year period....

  1. Theosophy in Denmark

    DEFF Research Database (Denmark)

    Dybdal, René

    2016-01-01

    Theosophy has been on of the major sources for inspiration for the new spiritual movement in Denmark during the 20th Century. In this paper the history of Theosophy in Denmark is described......Theosophy has been on of the major sources for inspiration for the new spiritual movement in Denmark during the 20th Century. In this paper the history of Theosophy in Denmark is described...

  2. The behavior limestone under explosive load

    Science.gov (United States)

    Orlov, M. Yu; Orlova, Yu N.; Bogomolov, G. N.

    2016-11-01

    Limestone behavior under explosive loading was investigated. The behavior of the limestone by the action of the three types of explosives, including granular, ammonite and emulsion explosives was studied in detail. The shape and diameter of the explosion craters were obtained. The observed fragments after the blast have been classified as large, medium and small fragments. Three full-scale experiments were carried out. The research results can be used as a qualitative test for the approbation of numerical methods.

  3. Wine production in Denmark

    DEFF Research Database (Denmark)

    Bentzen, Jan Børsen; Smith, Valdemar

    By the end of the former century there were less than 10 commercial vintners producing wine in Denmark. There was widespread acceptance of the view that commercial production of wine in the most northern parts of Europe was impossible. However, the number of commercial wine growers in Denmark grew...... to more than 60 at the end of year 2009 and the Association of Danish Winegrowers now counts more than 1400 members. Denmark can no longer be seen as a non-wine producing country! Formally, the transformation of Denmark to a wine producing country took place in year 2000 when Denmark was accepted...... as a commercial wine producing nation within the European Union. Based on a remarkably detailed micro data set this paper first gives a description of wine production in Denmark and thereafter we address the question whether vineyard characteristics are important for the quality of the wine and/or whether...

  4. Evaluation of modeling approaches to simulate contaminant transport in a fractured limestone aquifer

    DEFF Research Database (Denmark)

    Mosthaf, Klaus; Fjordbøge, Annika Sidelmann; Broholm, Mette Martina

    in fractured limestone aquifers. The model comparison is conducted for a contaminated site in Denmark, where a plume of dissolved PCE has migrated through a fractured limestone aquifer. Field data includes information on spill history, distribution of the contaminant (multilevel sampling), geology...... and hydrogeology. To describe the geology and fracture system, data from borehole logs and cores was combined with an analysis of heterogeneities and fractures from a nearby excavation and pump test data. We present how field data is integrated into the different model concepts. A challenge in the use of field...... and remediation strategies. Each model is compared with field data, considering both model fit and model suitability. Results show a considerable difference between the approaches, and that it is important to select the right one for the actual modeling purpose. The comparison with data showed how much...

  5. Comparison of different modeling approaches to simulate contaminant transport in a fractured limestone aquifer

    DEFF Research Database (Denmark)

    Mosthaf, Klaus; Rosenberg, L.; Balbarini, Nicola

    . Given available field data and model purpose, this paper therefore aims to develop, examine and compare modeling approaches for transport of contaminants in fractured limestone aquifers. The model comparison was conducted for a contaminated site in Denmark, where a plume of a dissolved contaminant (PCE...... was combined with an analysis of heterogeneities and fractures from a nearby excavation (analog site). Methods for translating the geological information and fracture mapping into each of the model concepts were examined. Each model was compared with available field data, considering both model fit...... of field data is the determination of relevant hydraulic properties and interpretation of aqueous and solid phase contaminant concentration sampling data. Traditional water sampling has a bias towards fracture sampling, however concentrations in the limestone matrix are needed for assessing contaminant...

  6. Denmark's National Inventory Report

    DEFF Research Database (Denmark)

    Illerup, J. B.; Lyck, E.; Winther, M.

    This report is Denmark's National Inventory Report reported to the Conference of the Parties under the United Nations Framework Convention on Climate Change (UNFCCC) due by 15 April 2001. The report contains information on Denmark's inventories for all years' from 1990 to 1999 for CO2, CH4, N2O, CO...

  7. School gardens in Denmark

    DEFF Research Database (Denmark)

    Dyg, Pernille Malberg

    2016-01-01

    ). School gardens are sprouting in rural and urban areas across Denmark. This case study research sheds new light on various school garden models under the Gardens for Bellies program in Denmark, including school-, community-based and central school gardens. This study aims to document the organization...

  8. Denmark's National Inventory Report

    DEFF Research Database (Denmark)

    Illerup, J. B.; Lyck, E.; Winther, M.

    This report is Denmark's National Inventory Report reported to the Conference of the Parties under the United Nations Framework Convention on Climate Change (UNFCCC) due by 15 April 2001. The report contains information on Denmark's inventories for all years' from 1990 to 1999 for CO2, CH4, N2O, ......, NMVOC, SO2, HFCs, PFCs and SF6....

  9. The Blue Denmark

    DEFF Research Database (Denmark)

    Hansen, Carsten Ørts; Sornn-Friese, Henrik

    This paper makes an important contribution to the discussion about knowledge based localised externalities in the context of shipping and the maritime sector in Denmark. In the paper we ask if there is a national, knowledge‐based maritime cluster configured around the shipowners in Denmark. This ...

  10. Literature review, Denmark

    DEFF Research Database (Denmark)

    Vestergaard, Jens; Linneberg, Mai Skjøtt; Nielsen, Robert Green

    2001-01-01

    Gives an overvie of the situation with respect to organic and conversion markets in Denmark based on exsisting literature. The following subjects are covered. National Policies. Agricultural Production. Conversion. Agricultural Marketing......Gives an overvie of the situation with respect to organic and conversion markets in Denmark based on exsisting literature. The following subjects are covered. National Policies. Agricultural Production. Conversion. Agricultural Marketing...

  11. Anaerobic digestion in Denmark

    DEFF Research Database (Denmark)

    Angelidaki, Irini; Ellegaard, L.

    2002-01-01

    Centralized biogas plants (CBP) in Denmark codigest mainly manure, together with other organic waste such as industrial organic waste, source sorted household waste and sewage sludge. Today 22 large scale CBP's are in operation in Denmark and in 2001 they treated approx. 1.2 mio tonnes of manure ...

  12. Arbitration in Denmark

    DEFF Research Database (Denmark)

    Werlauff, Erik

    2008-01-01

    Having lagged behind in its arbitration rules for 30 years, Denmark has become an attractive country in which to conduct arbitration. Denmark now has one of Europe's most modern and streamlined arbitration acts, and if they so wish, the parties can exert a substantial influence on how the case is...

  13. Microbreweries in Denmark

    DEFF Research Database (Denmark)

    Mortensen, Birthe Kofoed; Østergaard Brandt, Sarah

    2015-01-01

    The large breweries in Denmark have existed in more than 150 years. The industry has in recent 10 years experienced a true beer revolution where local entrepreneurs created more than 100 microbreweries, so today there are about 120 breweries in Denmark. One of the reasons why so many microbreweries...

  14. Evaluation of Different Modeling Approaches to Simulate Contaminant Transport in a Fractured Limestone Aquifer

    Science.gov (United States)

    Mosthaf, K.; Rosenberg, L.; Balbarini, N.; Broholm, M. M.; Bjerg, P. L.; Binning, P. J.

    2014-12-01

    It is important to understand the fate and transport of contaminants in limestone aquifers because they are a major drinking water resource. This is challenging because they are highly heterogeneous; with micro-porous grains, flint inclusions, and being heavily fractured. Several modeling approaches have been developed to describe contaminant transport in fractured media, such as the discrete fracture (with various fracture geometries), equivalent porous media (with and without anisotropy), and dual porosity models. However, these modeling concepts are not well tested for limestone geologies. Given available field data and model purpose, this paper therefore aims to develop, examine and compare modeling approaches for transport of contaminants in fractured limestone aquifers. The model comparison was conducted for a contaminated site in Denmark, where a plume of a dissolved contaminant (PCE) has migrated through a fractured limestone aquifer. Multilevel monitoring wells have been installed at the site and available data includes information on spill history, extent of contamination, geology and hydrogeology. To describe the geology and fracture network, data from borehole logs was combined with an analysis of heterogeneities and fractures from a nearby excavation (analog site). Methods for translating the geological information and fracture mapping into each of the model concepts were examined. Each model was compared with available field data, considering both model fit and measures of model suitability. An analysis of model parameter identifiability and sensitivity is presented. Results show that there is considerable difference between modeling approaches, and that it is important to identify the right one for the actual scale and model purpose. A challenge in the use of field data is the determination of relevant hydraulic properties and interpretation of aqueous and solid phase contaminant concentration sampling data. Traditional water sampling has a bias

  15. Reaction between Hydrogen Sulfide and Limestone Calcines

    Czech Academy of Sciences Publication Activity Database

    Hartman, Miloslav; Svoboda, Karel; Trnka, Otakar; Čermák, Jiří

    2002-01-01

    Roč. 41, č. 10 (2002), s. 2392-2398 ISSN 0888-5885 R&D Projects: GA AV ČR IAA4072711; GA AV ČR IAA4072801 Keywords : hydrogen sulfide * limestone calcines * desulfurization Subject RIV: CI - Industrial Chemistry, Chemical Engineering Impact factor: 1.247, year: 2002

  16. Hydrogen Chloride Reaction with Lime and Limestone

    DEFF Research Database (Denmark)

    Erik Weinell, Claus; Jensen, Peter I.; Dam-Johansen, Kim

    1992-01-01

    The capacity of solid slaked lime and limestone for binding HCl from a gas phase has been investigated in the temperature range 60-1000 °C. The binding capacity is largest in the range 500-600 °C. However, for slaked lime in the presence of water, a large binding capacity is observed also below 150...

  17. Neutron activation analysis of limestone objects

    International Nuclear Information System (INIS)

    Meyers, P.; Van Zelst, L.

    1977-01-01

    The elemental composition of samples from limestone objects were determined by neutron activation analysis to investigate whether this technique can be used to distinguish between objects made of limestone from different sources. Samples weighing between 0.2-2 grams were obtained by drilling from a series of ancient Egyptian and medieval Spanish objects. Analysis was performed on aliquots varying in weight from 40-100 milligrams. The following elements were determined quantitatively: Na, K, Rb, Cs, Ba, Sc, La, Ce, Sm, Eu, Hf, Th, Ta, Cr, Mn, Fe, Co and Zn. The data on Egyptian limestones indicate that, because of the inhomogeneous nature of the stone, 0.2-2 gram samples may not be representative of an entire object. Nevertheless, multivariate statistical methods produced a clear distinction between objects originating from the Luxor area (ancient Thebes) and objects found north of Luxor. The Spanish limestone studied appeared to be more homogeneous. Samples from stylistically related objects have similar elemental compositions while relative large differences were observed between objects having no relationship other than the common provenance of medieval Spain. (orig.) [de

  18. Regionalization Lessons from Denmark

    DEFF Research Database (Denmark)

    Vrangbæk, Karsten

    2016-01-01

    and coordination. Regions and municipalities in Denmark are governed by directly elected democratic councils. The Danish case is thus an example of democratic decentralization, but within a framework of national coordination and fiscal control. In spite of the difference in size and historical traditions...... there are also many similarities between Canada and Denmark, particularly in terms of health and social policy goals and aspirations, and in terms of the commitment to a comprehensive, universal healthcare system. These similarities provide interesting opportunities for comparison....

  19. Hinduism in Denmark

    DEFF Research Database (Denmark)

    Fibiger, Marianne Qvortrup

    2017-01-01

    This is an overview article on all research done, articles written etc. on Hinduism in Denmark. The article includes longer introductions, and commentaries on and citations from every book, article, report that is part of the article.......This is an overview article on all research done, articles written etc. on Hinduism in Denmark. The article includes longer introductions, and commentaries on and citations from every book, article, report that is part of the article....

  20. The use of Limestone Powder as an Alternative Cement Replacement

    African Journals Online (AJOL)

    user

    focused on the effects of limestone on the cement ... construction materials in Ethiopia is increasing .... Findings of research works on the strength reveals ... This CEN standard sand is delivered ... control mix made without limestone fines.

  1. Kinetic Study of Calcination of Jakura Limestone Using Power Rate ...

    African Journals Online (AJOL)

    National Research Institute for Chemical Technology, P.M. B 1052, Zaria, ... calcination of Jakura limestone was also found to be first order reaction with respect to CaCO3 ... Keywords: Jakura, limestone, calcination, kinetics, power law model.

  2. Effect of limestone particle size on bone quality characteristics of ...

    African Journals Online (AJOL)

    A study was conducted to determine the effect of different limestone particle sizes in layer diets on bone quality characteristics at end-of-lay hens. Calcitic limestone (360 g Ca/kg DM) that is extensively used in commercial poultry diets was obtained from a specific South African source. Limestone particles were graded as ...

  3. The Öland limestone - A Swedish stone used for more than one thousand years

    Science.gov (United States)

    Schouenborg, Björn; Wickström, Linda; Mikaelsson, Jan

    2016-04-01

    landic limestone was intense even during Hanseatic times (14th to 17th centuries) and it can for example be found as floorings, mantel pieces, baptismal fonts in many German castles and manors. The literature tells us that export to Denmark, Poland and even southern Germany was intense during late medieval ages. This is because a lot of churches were built in Northern Europe at that time. However, the modern industrialised production had to wait until the early 20th century. Today, three companies quarry and process the limestones on a regular basis. They are primarily used for flooring, stairs, crazy stones for gardens, table tops, kitchen tops and, in some cases, also external cladding and paving. The latter only with more durable layers free of clay and open stylolites, so called "core stone" (direct translation). The presentation will show that the Öland limestone covers all aspects and requirements for being a Global heritage resource.

  4. Energy use in Denmark

    International Nuclear Information System (INIS)

    Schipper, L.; Howarth, R.; Andersson, B.; Price, L.

    1993-01-01

    This paper reviews the evolution of energy use in Denmark since the early 1970s, in order to shed light on the future path of energy use in Denmark, with particular emphasis on the role of energy efficiency. Improvements in end-use energy efficiency reduced primary energy requirements in Denmark by 22% between 1972 and 1988. This change accounts for two thirds of the decline in the ratio of energy use to gross domestic product that occurred during this time: the rest of the decline was caused by changes in the mix of goods and services produced and consumed by the Danes. Total energy savings achieved between 1972 and 1988 in Denmark ranked among the highest measured in any major OECD country. Overall, most of the energy savings in Denmark were brought about through improvements in technology. Short-term changes in consumer behaviour were significant in reducing energy needs for space heating and transport. An important stimulus for improved efficiency was higher energy prices, led in no small part by significant taxes imposed on small consumers of heating oil, electricity and motor fuels. (author). 21 refs, 20 figs, 2 tabs

  5. Plant Guide: Limestone hawksbeard: Crepis intermedia

    Science.gov (United States)

    L. St. John; D. Tilley

    2012-01-01

    Sunflower family (Asteraceae). Limestone hawksbeard is a native perennial forb with one or two stems arising from a taproot. Plants are 30-70cm tall and basal leaves are 10-40 cm long, pinnatifid, with a fairly broad, undivided midstrip and entire or dentate segments. Plants are densely or sparsely gray-tomentulose. There are 10-60 heads per plant that are 7-12...

  6. Denmark and UN peacekeeping

    DEFF Research Database (Denmark)

    Jakobsen, Peter Viggo

    2016-01-01

    Denmark became a staunch supporter of UN peacekeeping during the cold war because it simultaneously served its interests and values and this winning combination meant that it relatively quickly became internalized as part of Denmark’s foreign policy identity. Denmark turned its back on UN...... peacekeeping when NATO took over from the UN in Bosnia in 1995. Since then Denmark has prioritized NATO- and US-led operations. The Danish shift was driven by the interest in supporting the Western great powers as well as an altruistic desire to improve United Nations Protection Force’s (UNPROFOR) dismal...... humanitarian record in Bosnia. This belief was also generated by the positive lessons learned from Denmark’s pioneering use of tanks in UNPROFOR. This tank deployment and subsequent participation in NATO and US-led missions created a new warrior identity. This identity and the Danish interest in maintaining...

  7. Europe in Denmark

    DEFF Research Database (Denmark)

    Atzbach, Rainer

    2017-01-01

    This paper examines the presence of European ‘contacts’ during the Middle Ages and the Renaissance period, i.e. elements of culture derived from Central Europe that were introduced into historical Denmark, on the basis of three examples. First, Baltic Ware, a specific pottery type, was developed...... from Western Slavic antetypes. The rapid spread of Baltic Ware over the Eastern part of Denmark does not reflect a Slavic settlement but the adoption of a high quality product for cooking. Second, the art of glass making was nearly unknown before the Renaissance. To help meet the growing demand...... were imported to Denmark as elements of European medieval court culture. Through a trickling down process they became a common part of daily life in the Renaissance....

  8. Limestone quarrying and quarry reclamation in Britain

    Science.gov (United States)

    Gunn, J.; Bailey, D.

    1993-06-01

    Limestones have been worked for many thousands of years — initially for building stone and agricultural lime and more recently for a wide range of construction and industrial uses. In most industrialized countries limestone quarries represent the most visually obvious and, in both process and landform terms, the most dramatic anthropogenic impact on karst terrain. However, quarrying has, to date, received surprisingly little attention from karst scientists. Research in the English Peak District suggested that the postexcavation evolution of quarried limestone rock faces was in part a result of the methods used in their excavation, and this led to the development of a technique designed to reduce the visual and environmental impacts of modern quarries by “Landform replication. ” This involves the use of controlled “restoration blasting” techniques on quarried rock slopes to construct a landform sequence similar to that in the surrounding natural landscape. The constructed landforms are then partially revegetated using appropriate wildflower, grass, and/or tree species.

  9. Science Communication in Denmark

    DEFF Research Database (Denmark)

    Busch, Henrik

    2005-01-01

    This paper was presented during the author?s visit at the Faculty of Human Development of the University of Kobe . The paper is intended to provide the knowledge about science communication in the Nordic countries (in particular in Denmark). The focus in the paper is on (i) examples of new...... and innovative modes of science communication in Denmark and (ii) educational programs for science communicators. Furthermore, emphasis is on the pedagogical ideas behind the initiatives, rather than on thorough descriptions of structures, curricula and evaluations of the projects....

  10. BIM education in Denmark

    DEFF Research Database (Denmark)

    Svidt, Kjeld

    The International Conference on Digital Construction of 2015, Vilnius, Lithuania. See the invited speak ppt. presentation here http://skaitmeninestatyba.lt/files/SKST'15%20skaidr%C4%97s/2_3_Svidt_BIM_education_i_Denmark_Skaitmenine_statyba2015.pdf......The International Conference on Digital Construction of 2015, Vilnius, Lithuania. See the invited speak ppt. presentation here http://skaitmeninestatyba.lt/files/SKST'15%20skaidr%C4%97s/2_3_Svidt_BIM_education_i_Denmark_Skaitmenine_statyba2015.pdf...

  11. Study Groups in Denmark

    DEFF Research Database (Denmark)

    Hjorth, Poul G.

    2007-01-01

    Since 1998 European Study Groups have been held in Denmark, and Danish companies from LEGO and NOVO to very small high-tech firms have participated. I briefly describe the history, the organisation and the format of the Danish Study Groups, and highlight a few problem solutions.......Since 1998 European Study Groups have been held in Denmark, and Danish companies from LEGO and NOVO to very small high-tech firms have participated. I briefly describe the history, the organisation and the format of the Danish Study Groups, and highlight a few problem solutions....

  12. Bioethics in Denmark

    DEFF Research Database (Denmark)

    Nielsen, Morten Ebbe Juul; Andersen, Martin Marchman

    2014-01-01

    This article examines two current debates in Denmark-assisted suicide and the prioritization of health resources-and proposes that such controversial bioethical issues call for distinct philosophical analyses: first-order examinations, or an applied philosophy approach, and second-order examinati......This article examines two current debates in Denmark-assisted suicide and the prioritization of health resources-and proposes that such controversial bioethical issues call for distinct philosophical analyses: first-order examinations, or an applied philosophy approach, and second...

  13. Denmark at a Crossroad?

    DEFF Research Database (Denmark)

    Hoeyer, Klaus

    2016-01-01

    Denmark is regularly portrayed in international science journals as ‘the epidemiologist’s dream’: a country where health data on all citizens can be combined with e.g. information about social or financial position, kinship ties, school performance data as well as tissue samples. Moreover, it can...... to individual rights there is an unfortunate tendency to conjure concerns about privacy with rights of autonomy. We need new modes of ethical reasoning that take point of departure in an understanding of actual data practices. Since Denmark is in many ways at the forefront of intensified data sourcing...

  14. Cancer rehabilitation in Denmark

    DEFF Research Database (Denmark)

    Hansen, Helle Ploug; Tjørnhøj-Thomsen, Tine

    2008-01-01

    A fundamental assumption behind cancer rehabilitation in many Western societies is that cancer survivors can return to normal life by learning to deal with the consequences of their illness and their treatment. This assumption is supported by increasing political attention to cancer rehabilitation...... and a growth in residential cancer-rehabilitation initiatives in Denmark (Danish Cancer Society 1999; Government of Denmark 2003). On the basis of their ethnographic fieldwork in residential-cancer rehabilitation courses, the authors examine the new rehabilitation discourse. They argue that this discourse has...

  15. Chernobyl accident and Denmark

    International Nuclear Information System (INIS)

    1986-12-01

    The report describes the Chernobyl accident and its consequences for Denmark in particular. It was commissioned by The Secretary of State for the Environment. The event at the accident site, the release and dispersal of radioactive substances into the atmosphere and over Europe, is described. A discussion of the Danish organisation for nuclear emergencies, how it was activated and adapted to the actual situation, is given. A comprehensive description of the radiological contamination in Denmark following the accident and the estimated health effects, is presented. The situation in other European countries is mentioned. (author)

  16. Metal Detecting in Denmark

    DEFF Research Database (Denmark)

    Dobat, A.S.

    2016-01-01

    questions: 1) Why does the liberal model work in Denmark, 2) which downsides of the liberal model of metal detector archaeology in Denmark can be identified, 30 years after its inception the beginning, and 3) what are possible solutions to these problems. It will be argued that a user-driven national...... all of the spectacular and ground-breaking discoveries of the past decades are owed to metal detectors in the hands of amateur archaeologists. In order to serve as a contribution to the discussion on the upsides and downsides of liberal metal detector archaeology, this article addresses mainly three...

  17. Denmark's National Inventory Report 2010

    DEFF Research Database (Denmark)

    Nielsen, Ole-Kenneth; Lyck, Erik; Mikkelsen, Mette Hjorth

    2010-01-01

    This report is Denmark's National Inventory Report 2010. The report contains information on Denmark's emission inventories for all years' from 1990 to 2008 for CO2, CH4, N2O, HFCs, PFCs and SF6, NOx, CO, NMVOC, SO2.......This report is Denmark's National Inventory Report 2010. The report contains information on Denmark's emission inventories for all years' from 1990 to 2008 for CO2, CH4, N2O, HFCs, PFCs and SF6, NOx, CO, NMVOC, SO2....

  18. Gender in physics in Denmark

    Science.gov (United States)

    Niss, Kristine; Nordström, Birgitta; Bearden, Ian; Grage, Mette M.-L.

    2013-03-01

    More women than men get a college degree in Denmark. However, Denmark still has very gender-separated labor market, and in physics only 10% of the university professors are women. Measures are needed to get a more balanced gender distribution among university physicists at all levels in Denmark.

  19. Gender in physics in Denmark

    DEFF Research Database (Denmark)

    Niss, Karsten Ulrik; Nordström, B.; Bearden, I.

    2013-01-01

    More women than men get a college degree in Denmark. However, Denmark still has very gender-separated labor market, and in physics only 10 of the university professors are women. Measures are needed to get a more balanced gender distribution among university physicists at all levels in Denmark....

  20. Educational Governance in Denmark

    Science.gov (United States)

    Moos, Lejf

    2014-01-01

    Denmark has entered global competition by expanding collaboration with European countries, which is profoundly impacting the public sector and school governance. Relations between the state and institutions are transforming from traditional democratic, public-sector models of governance into new forms characterized as corporate and market-driven…

  1. Real Estate in Denmark

    DEFF Research Database (Denmark)

    Rimmer, Nina Røhr

    2016-01-01

    A general introduction to buying, owning and selling Property i Denmark. The cost of buying and selling property and the tax implications as well as the general concept of real estate is introduced. The paper includes also a brief introduction to some of the aspects which you should beware of when...

  2. Bente Boa, Torm, Denmark

    DEFF Research Database (Denmark)

    Wagtmann, Maria Anne

    2009-01-01

    At the beginning of July 2009, Maria Anne Wagtmann (Associate Professor, PhD, University of Southern Denmark) had the opportunity to interview Ms Bente Boa, a senior marine HR manager in the Danish ship owning firm TORM A/S' (http://www.torm.com/). Bente Boa is also chairwoman of the "The Sea...

  3. Chernobyl accident and Denmark

    International Nuclear Information System (INIS)

    1986-12-01

    The report describes the Chernobyl accident and its consequences for Denmark in particular. It was commissioned by The Secretary of State for the Environment. Volume 2 contains copies of original documents issued by Danish authorities during the first accident phase and afterwards. Evaluations, monitoring data, press releases, legislation acts etc. are included. (author)

  4. Wealth & Immigration in Denmark

    DEFF Research Database (Denmark)

    Dreyer, Johannes Kabderian; Wolffsen, Poul; Mortensen, Mia

    2014-01-01

    Applying newly developed methods this paper quantifies human capital in Denmark and analyzes highly qualified immigration as a potential source of wealth generation. In order to quantify human capital, we use the methodology of Lettau and Ludvigson (2001, 2004), Zhang (2006) and Dreyer et al. (2013...

  5. Music Streaming in Denmark

    DEFF Research Database (Denmark)

    Pedersen, Rasmus Rex

    This report analyses how a ’per user’ settlement model differs from the ‘pro rata’ model currently used. The analysis is based on data for all streams by WiMP users in Denmark during August 2013. The analysis has been conducted in collaboration with Christian Schlelein from Koda on the basis of d...

  6. The forest Gribskov, Denmark

    DEFF Research Database (Denmark)

    Overballe-Petersen, Mette V; Raulund-Rasmussen, Karsten; Buttenschøn, Rita M.

    2014-01-01

    valuable when working with forest management, conservation and restoration. Integrating the legacies of past disturbances-natural as well as anthropogenic-into conservation and management strategies is likely to favour natural values and ecosystem services. A case-study in Gribskov, Denmark, using...

  7. Anthroposophy in Denmark

    DEFF Research Database (Denmark)

    Dybdal, René

    2016-01-01

    The Anthroposophical worldview has had an significant impact on a range of initiatives and institutions within esoteric thinking in many western countries during teh 20th Century - which is also the case in Denmark. This article gives a brief review over the development of Anthroposophical Societ...

  8. Denmark Wind Energy Programme

    DEFF Research Database (Denmark)

    Shen, Wen Zhong

    2015-01-01

    In this chapter, a summary of some ongoing wind energy projects in Denmark is given. The research topics comprise computational model development, wind turbine (WT) design, low-noise airfoil and blade design, control device development, wake modelling and wind farm layout optimization....

  9. Prostitution in Denmark

    DEFF Research Database (Denmark)

    Stormhøj, Christel; Pedersen, Bodil Maria; Hansen, Kirsten Grønbæk

    2015-01-01

    Prostitution is a worldwide phenomenon, and so are the controversies surrounding it. In Denmark, as in many countries, there is an ongoing public debate about whether it should be seen as a social/political problem, or as a job like any other. The debate takes place within the tension between wel...... welfare state discourses and neo-liberal discourses....

  10. EPBD implementation in Denmark

    DEFF Research Database (Denmark)

    Wittchen, Kim Bjarne; Thomsen, Kirsten Engelund; Malmsteen, Margit

    2013-01-01

    This report presents an overview of the current status of the implementation of the Directive on the Energy Performance of Buildings (EPBD) in Denmark, as well as plans for its evolution. It addresses the energy requirements, as well as the certification and inspection systems, including quality ...

  11. Denmark. [CME Country Reports].

    Science.gov (United States)

    Council of Europe, Strasbourg (France). Documentation Center for Education in Europe.

    According to an agreement between the parties of the labour market and the Ministry of Labour, the immigration of foreign workers into Denmark takes place on a quota basis and conforms to a series of regulations, including a rule that the foreign worker, prior to departing from his country, must have made contract arrangements for his job. This…

  12. Country report Denmark

    DEFF Research Database (Denmark)

    Mogensen, Finn; Breiting, Søren

    2005-01-01

    Quality criteria for the work of Danish schools working with environmental education or education for sustainable development as they can be revealed in documents related to special initiatives like green flag - green school projects and ecoschools. These are described as part of the state...... of environmental education and education for sustainable development in Denmark, and include explicit criteria as well as implicit criteria....

  13. Rock mass characterization for tunnels in the Copenhagen limestone

    DEFF Research Database (Denmark)

    Foged, Niels Nielsen; Jakobsen, Lisa; Jackson, Peter

    2007-01-01

    Tunnels in Copenhagen are drilled through highly anisotropic limestone comprising alternating strongly lithified and less lithified parts. The mass quality of the limestone is usually defined from fracture spacing registered in core samples. The deposit is, however, affected destructively by dril...... by drilling activity yielding a low Rock Quality Designation RQD. In-situ observations of the limestone in excavations or televiewer logs reveal only few natural discontinuities compared to core logging, indicating a very good suitability for tunneling....

  14. Mechanical Analysis Of Limestone In Jaya, Lhong, And Lhoknga

    Directory of Open Access Journals (Sweden)

    Raihan .

    2012-09-01

    Full Text Available Research about mechanical analysis of limestone in District Jaya, Lhong, and Lhoknga has been done from Dec. 2011 to Mei 2012. This study aim is to classify the limestones based on physical and mechanical tests as well as identify opportunities limestone utilization in accordance with the SII 0378-80 as a condition of quality natural stone for building. Research have been done by testing compressive strength, modulus Young, wear, specific gravity, porosity, and absorption. The result shows that the limestones are qualified natural stone for building the foundation, curbstone, stone and ornamental stone or paste.

  15. The Influence of Combustion-derived pollutants on limestone deterioration

    DEFF Research Database (Denmark)

    Johnson, J.B.; Montgomery, Melanie; Thompson, G.E.

    1996-01-01

    The wet deposition of combustion-derived atmospheric pollutant species, on to freshly cut or diesel-smoked Portland and Monks Park limestone and marble samples, was carried out in a laboratory 'wetting and drying' salt spray chamber for 84 days. Along with the effect of CO2-equilibrated de...... limestones, respectively. Thus the water and hydrogen ion loading effects are significant, as well as the limestone type, but the nature of the anion is not, under the given wetting and drying regime. Further work showed that the increased resistance of marble over that of limestone, to calcium loss...

  16. Modeling contaminant plumes in fractured limestone aquifers

    DEFF Research Database (Denmark)

    Mosthaf, Klaus; Brauns, Bentje; Fjordbøge, Annika Sidelmann

    Determining the fate and transport of contaminant plumes from contaminated sites in limestone aquifers is important because they are a major drinking water resource. This is challenging because they are often heavily fractured and contain chert layers and nodules, resulting in a complex transport...... model. The paper concludes with recommendations on how to identify and employ suitable models to advance the conceptual understanding and as decision support tools for risk assessment and the planning of remedial actions....... behavior. Improved conceptual models are needed for this type of site. Here conceptual models are developed by combining numerical models with field data. Several types of fracture flow and transport models are available for the modeling of contaminant transport in fractured media. These include...... the established approaches of the equivalent porous medium, discrete fracture and dual continuum models. However, these modeling concepts are not well tested for contaminant plume migration in limestone geologies. Our goal was to develop and evaluate approaches for modeling the transport of dissolved contaminant...

  17. Nutritional rickets in Denmark

    DEFF Research Database (Denmark)

    Beck-Nielsen, Signe; Jensen, Tina Kold; Gram, Jeppe

    2009-01-01

    INTRODUCTION: This study describes clinical and biochemical characteristics of nutritional rickets and risk factors at diagnosis among children living in Denmark. All medical records from patients with rickets referred to or discharged from hospitals in Southern Denmark from 1985 to 2005 were...... identified by register search. MATERIALS AND METHODS: Patients included were younger than 15 years of age and fulfilled the diagnostic criteria of primary, nutritional rickets. A total of 112 patients with nutritional rickets were included: 29 were of ethnic Danish origin, and 83 were immigrants. RESULTS......: Patients diagnosed before the age of 4 (median 1.4) years displayed the classic clinical signs of rickets, whereas patients diagnosed after the age of 4 (median 12.5) years had few clinical signs and unspecific symptoms. Ethnic Danish patients were only diagnosed before age 24 months, and they accounted...

  18. Sexual offences in Denmark

    DEFF Research Database (Denmark)

    Heinskou, Marie Bruvik; Schierff, Laura Marie; Ejbye-Ernst, Peter

    addresses the question of a dark figure of crime as well as a supposed hidden population of male victims and is consequently developed as a two-stage survey project. The population of interest is men and women above the age of 18 who potentially are victims of sexual offences. The analysis will initially......During the last years, the question of whether or not Denmark suffers from an increasing culture of violation mirroring incidents of rape and sexual coercion has been a hot topic. Thus, the low number of convictions and the complexities of the reported cases has brought about questions...... rape cases has been questioned. The aim of the paper is to present the actual prevalence of sexual offences in Denmark and to investigate the various forms of offenses and their distributions among men as well as women. Thus, this paper work with a conceptualization of rape having both men and women...

  19. Civil Procedure In Denmark

    DEFF Research Database (Denmark)

    Werlauff, Erik

    scientific activities conducted by the author, partly based on the author's experience as a member, through a number of years, of the Danish Standing Committee on Procedural Law (Retsplejeraadet), which on a continuous basis evaluates the need for civil procedural reforms in Denmark, and finally also based......The book contains an up-to-date survey of Danish civil procedure after the profound Danish procedural reforms in 2007. It deals with questions concerning competence and function of Danish courts, commencement and preparation of civil cases, questions of evidence and burden of proof, international...... procedural questions, including relations to the Brussels I Regulation and Denmark's participation in this Regulation via a parallel convention with the EU countries, impact on Danish civil procedure of the convention on human rights, preparation and pronouncement of judgment and verdict, questions of appeal...

  20. Energy policy in Denmark

    Energy Technology Data Exchange (ETDEWEB)

    Lidegaard, M.

    2012-12-15

    Denmark has a long tradition of active energy policy, initiated by the first oil crisis in 1973. Over the years, numerous actions have been taken on the basis of a broad consensus in the Danish Parliament - both in order to reduce the energy consumption and in order to increase the share of renewable energy. Now, the cornerstones for the Danish energy future have also been laid. The Danish Government has set the long-term goal to abandon fossil fuels by 2050. An important milestone was reached in March 2012 with an Energy Agreement for the period 2012-2020 - again based on a broad consensus in the Danish Parliament. This Agreement contains a wide range of ambitious initiatives, bringing Denmark a good step closer to the target of 100% renewable energy. In the present publication, a selection of past and present Danish energy policies is presented, together with the results achieved in terms of energy savings, use of renewables etc. (LN)

  1. Developments in Denmark

    International Nuclear Information System (INIS)

    Pedersen, M.

    1992-01-01

    The photocopies of overheads with relevant data illustrate the production, foreign trade and consumption of electric power in Denmark during 1990 and 1991 and prices and taxes for 1990-1992. The structure of electric power production and supply is demonstrated. Currently, there are 12 electricity companies (four of which are integrated) and 107 distribution companies in Denmark. An active debate is now taking place on future structure. The main questions are related to the possible fusion of the electricity companies, and amalgamation of distribution companies and/or coordination/cooperation with district heating and gas distribution. These questions are expanded in note form. Some of these considerations will be strongly influenced by future developments within the European Community, it is explained. (AB)

  2. Company cases Denmark

    DEFF Research Database (Denmark)

    Tølle, Martin; Pedersen, Jørgen Lindgaard

    2005-01-01

    for government sector in Denmark. DC employed 1,000 persons and had a market share on 75 % in the market of large government institutions when it was taken over. Danish government wanted to sell DC in order to get more intensity in competion in IT - markets in general and especially in the market for public...... IT - solitions. CSC wanted to buy DC to penetrate the Nordic market. Some effects can be mentioned: Employment in CSC - DK is in 2003 1,700 persons or 2,600 including other companies bought up recently. In innovation positive effects can be registered from contacts with CSC - International. Not only from access...... - Laboratoriet, Benzon - Pharma and Pharma - Medica during years 1988 - 1991.Nycomed wants to establish itself as a company on European level.After a decade with different owners, fusions and splitting ups a construction in which head quarter and R&D move to Denmark close to Copenhagen. The importance...

  3. Corporate Bonds in Denmark

    DEFF Research Database (Denmark)

    Tell, Michael

    2015-01-01

    Corporate financing is the choice between capital generated by the corporation and capital from external investors. However, since the financial crisis shook the markets in 2007–2008, financing opportunities through the classical means of financing have decreased. As a result, corporations have...... to think in alternative ways such as issuing corporate bonds. A market for corporate bonds exists in countries such as Norway, Germany, France, the United Kingdom and the United States, while Denmark is still behind in this trend. Some large Danish corporations have instead used foreign corporate bonds...... markets. However, NASDAQ OMX has introduced the First North Bond Market in December 2012 and new regulatory framework came into place in 2014, which may contribute to a Danish based corporate bond market. The purpose of this article is to present the regulatory changes in Denmark in relation to corporate...

  4. Technology Museums in Denmark

    DEFF Research Database (Denmark)

    Søndergaard, Morten Karnøe

    2012-01-01

    This article presents an exhibit review of some of the major technology museums in Denmark. First comes an introduction to the Danish museum ”landscape”. Second a total of six museums and their technology focused exhibits are presented. Among the museums are the Fisheries and Maritime Museum...... in Esbjerg, housing one of the most impressive and representative exhibitions on the technology behind the strong Danish maritime sector. Another museum being mentioned is the Energy Museum, which covers the background for some of the major breakthroughs performed in Denmark within this area; particularly...... within wind power technology. Finally special attention is devoted to the Danish Technological Museum. A museum which is the oldest and most elaborate of all the technology museums. The museum covers virtually every technological breakthrough with any relevance in a Danish section, with a special focus...

  5. Trauma facilities in Denmark

    DEFF Research Database (Denmark)

    Weile, Jesper; Nielsen, Klaus; Primdahl, Stine C

    2018-01-01

    Background: Trauma is a leading cause of death among adults aged challenge. Evidence supports the centralization of trauma facilities and the use multidisciplinary trauma teams. Because knowledge is sparse on the existing distribution of trauma facilities...... and the organisation of trauma care in Denmark, the aim of this study was to identify all Danish facilities that care for traumatized patients and to investigate the diversity in organization of trauma management. Methods: We conducted a systematic observational cross-sectional study. First, all hospitals in Denmark...... were identified via online services and clarifying phone calls to each facility. Second, all trauma care manuals on all facilities that receive traumatized patients were gathered. Third, anesthesiologists and orthopedic surgeons on call at all trauma facilities were contacted via telephone...

  6. Criminal Law in Denmark

    DEFF Research Database (Denmark)

    Langsted, Lars Bo; Garde, Peter; Greve, Vagn

    Derived from the renowned multi-volume International Encyclopaedia of Laws, this book provides a practical analysis of criminal law in Denmark. An introduction presents the necessary background information about the framework and sources of the criminal justice system, and then proceeds......-trial proceedings, trial stage, and legal remedies. A final part describes the execution of sentences and orders, the prison system, and the extinction of custodial sanctions or sentences. Its succinct yet scholarly nature, as well as the practical quality of the information it provides, make this book a valuable...... resource for criminal lawyers, prosecutors, law enforcement officers, and criminal court judges handling cases connected with Denmark. Academics and researchers, as well as the various international organizations in the field, will welcome this very useful guide, and will appreciate its value in the study...

  7. Food insecurity in Denmark

    DEFF Research Database (Denmark)

    Lund, Thomas Bøker; Holm, Lotte; Tetens, Inge

    2018-01-01

    .001) and higher risk of psychological distress (women: adj.RR 2.42 P Obesity was more prevalent in low/very low food secure women (RR 2.44 P Food insecurity in Denmark is associated with adverse factors...... such as unhealthy diet, obesity, life satisfaction, and psychological distress. It is important to widen food insecurity research to non-liberal welfare states since low/very low food security is negatively associated with unhealthy eating and other health indicators, even in a social-democratic welfare state.......Background: Food insecurity and its consequences have not received much attention in the Nordic, social-democratic welfare states. This study reports the prevalence of low and very low food security in Denmark, identifies its socio-demographic determinants and examines its associations with eating...

  8. Electricity supply in Denmark

    International Nuclear Information System (INIS)

    1995-08-01

    Electric power was introduced in Denmark in 1891. Recently, the development of the Danish electricity supply industry has been influenced by a number of political measures aiming at a cleaner environment. The booklet gives a general introduction to the industry in Denmark. It reflects the actual supply situation and looks at the future as well as giving a survey of the historical and political background. In addition to relevant statistics, brief information is given on national energy balance, consumption, costs and pricing, distribution and transmission, end-use efficiency, electric power generation, imports and exports, wind power, cogeneration and district heating, pollutive emission, planning and Danish energy policy. There is also a list of useful addresses. (AB)

  9. Rickettsioses in Denmark

    DEFF Research Database (Denmark)

    Ocias, Lukas Frans; Jensen, Bo Bødker; Villumsen, Steen

    2018-01-01

    Rickettsia spp. can be found across the globe and cause disease of varying clinical severity, ranging from life-threatening infections with widespread vasculitis to milder, more localized presentations. Vector and, to some degree, reservoir are hematophagous arthropods, with most species harboured...... by ticks. In Denmark, rickettsiae are known as a cause of imported travel-related infections, but are also found endemically in ticks across the country. Data are, however, lacking on the geographical origin and clinical features of diagnosed cases. In this study, we have examined the travel history...... and clinical features of two groups of patients; 1) hospital-patients diagnosed with rickettsioses in the years 2010-2015 and 2) patients from primary health care (PHC) centers in Denmark having demonstrated anti-rickettsia antibodies in the years 2012-2015. The patients were identified using the Danish...

  10. Youth Homelessness in Denmark?

    DEFF Research Database (Denmark)

    Børner Stax, Tobias

    Based on a literature study this chapter reflects upon the existence of youth homelessness in Denmark. The chapter contains reflections upon the juridical measures directed towards youngsters living on the margin of the Danish society and presents two concrete project directed towards young people...... living rough. The chapter is taken form an anthology discussion youth homelessness in the different member states of the European Union....

  11. Radioanalytical chemistry in Denmark

    International Nuclear Information System (INIS)

    Heydorn, K.; Levi, H.

    1979-12-01

    Publications from Denmark in the field of radioanalytical chemistry are presented in 2 groups, one involving neutron activation and similar techniques, and one for other radioanalytical work. Altogether 258 references including books are given for the period 1936-1977, and the overall doubling time is 5.2 years. A significant deviation from a purely exponential growth was caused by the Second World War. (author)

  12. Incorporating full-scale experience into advanced limestone wet FGD designs

    International Nuclear Information System (INIS)

    Rader, P.C.; Bakke, E.

    1992-01-01

    Utilities choosing flue gas desulfurization as a strategy for compliance with Phase I of the 1990 Clean Air Act Amendments will largely turn to limestone wet scrubbing as the most cost-effective, least-risk option. State-of-the-art single absorber wet scrubbing systems can be designed to achieve: SO 2 removal efficiencies in excess of 95 %, system availabilities in excess of 98%, and byproducts which can be marketed or land filled. As a result of varying fuel characteristics, site considerations, and owner preferences, FGD plants for large central power stations are typically custom-designed. To avoid the risks associated with new, first-of-a-kind technologies, utilities have preferred to purchase FGD systems from suppliers with proven utility experience and reference plants as close as possible to the design envisioned. As the market for FGD systems is regulatory driven, the demand has shifted geographically in response to national environmental policies. Although limestone wet scrubbing has emerged as the overwhelming choice for SO 2 emission control in coal-fired power stations, the technology has evolved and been adapted to suit local and regional technical and economic situations. Global suppliers are able to benefit from experience and technological advances in the world market. With market units in the U.S., Denmark, Italy, Sweden, and Germany active in the design and supply of wet FGD plants, ABB has a unique ability to incorporate knowledge and experience gained throughout the industrialized world to acid rain retrofit projects in the U.S. This paper describes the design of advanced limestone wet scrubbing systems for application to acid rain retrofits. Specifically, the evolution of advanced design concepts from a global experience base is discussed

  13. STEAM INJECTION INTO FRACTURED LIMESTONE AT LORING AIR FORCE BASE

    Science.gov (United States)

    A research project on steam injection for the remediation of spent chlorinated solvents from fractured limestone was recently undertaken at the former Loring AFB in Limestone, ME. Participants in the project include the Maine Department of Environmental Protection, EPA Region I,...

  14. Catalytic and Gas-Solid Reactions Involving HCN over Limestone

    DEFF Research Database (Denmark)

    Jensen, Anker; Johnsson, Jan Erik; Dam-Johansen, Kim

    1997-01-01

    In coal-fired combustion systems solid calcium species may be present as ash components or limestone added to the combustion chamber. In this study heterogeneous reactions involving HCN over seven different limestones were investigated in a laboratory fixed-bed quartz reactor at 873-1,173 K...

  15. Effect of limestone particle size on egg production and eggshell ...

    African Journals Online (AJOL)

    Different limestone particle sizes had no effect on any of the tested egg production and eggshell quality parameters. These results suggested that larger particles limestone are not necessarily essential to provide sufficient Ca2+ to laying hens for egg production and eggshell quality at end-of-lay, provided that the dietary Ca ...

  16. Wind farm progress in Denmark

    DEFF Research Database (Denmark)

    Frandsen, Sten Tronæs; Andersen, Per Dannemand

    1996-01-01

    The paper presents a status of wind power in Denmark and on the technical and industrial achievements. The present total installed capacity is be the end of 1995 approx. 630 MW, and the contribution to the electric energy generation in Denmark is approx. 4%.......The paper presents a status of wind power in Denmark and on the technical and industrial achievements. The present total installed capacity is be the end of 1995 approx. 630 MW, and the contribution to the electric energy generation in Denmark is approx. 4%....

  17. African Diaspora Associations in Denmark

    DEFF Research Database (Denmark)

    Vammen, Ida Marie; Trans, Lars Ove

    2011-01-01

    Since the early 1990s, an increasing number of African migrants have come to Denmark, where they have formed a large number of migrant associations. This chapter presents selected findings from a comprehensive survey of African diaspora associations in Denmark and focuses specifically on their tr......Since the early 1990s, an increasing number of African migrants have come to Denmark, where they have formed a large number of migrant associations. This chapter presents selected findings from a comprehensive survey of African diaspora associations in Denmark and focuses specifically...

  18. Field trial of a pulsed limestone diversion well

    Science.gov (United States)

    Sibrell, Philip L.; Denholm, C.; Dunn, Margaret

    2013-01-01

    The use of limestone diversion wells to treat acid mine drainage (AMD) is well-known, but in many cases, acid neutralization is not as complete as would be desired. Reasons for this include channeling of the water through the limestone bed, and the slow reaction rate of the limestone gravel. A new approach to improve the performance of the diversion well was tested in the field at the Jennings Environmental Education Center, near Slippery Rock, PA. In this approach, a finer size distribution of limestone was used so as to allow fluidization of the limestone bed, thus eliminating channeling and increasing particle surface area for faster reaction rates. Also, water flow was regulated through the use of a dosing siphon, so that consistent fluidization of the limestone sand could be achieved. Testing began late in the summer of 2010, and continued through November of 2011. Initial system performance during the 2010 field season was good, with the production of net alkaline water, but hydraulic problems involving air release and limestone sand retention were observed. In the summer of 2011, a finer size of limestone sand was procured for use in the system. This material fluidized more readily, but acid neutralization tapered off after several days. Subsequent observations indicated that the hydraulics of the system was compromised by the formation of iron oxides in the pipe leading to the limestone bed, which affected water distribution and flow through the bed. Although results from the field trial were mixed, it is believed that without the formation of iron oxides and plugging of the pipe, better acid neutralization and treatment would have occurred. Further tests are being considered using a different hydraulic configuration for the limestone sand fluidized bed.

  19. The question of how Denmark got to be Denmark

    DEFF Research Database (Denmark)

    Jensen, Mette Frisk

    2014-01-01

    Historian Mette Frisk Jensen summarizes some of the latest findings in her research on the history of anti-corruption in Denmark since the 17th Century.......Historian Mette Frisk Jensen summarizes some of the latest findings in her research on the history of anti-corruption in Denmark since the 17th Century....

  20. [Bariatric surgery in Denmark.

    DEFF Research Database (Denmark)

    Funch-Jensen, P.; Iversen, M.G.; Kehlet, H.

    2008-01-01

    INTRODUCTION: In 2005 the National Board of Health (NBH) published guidelines on bariatric surgery in Denmark. The aim of the present study was to shed light on the national bariatric effort in relation to these guidelines. MATERIAL AND METHODS: The analysis is based on extraction of the following......, a tendency which was attributable to the activities of one of the private clinics. CONCLUSION: The frequency with which bariatric surgery is performed follows a strongly increasing trend and the procedures are only performed at the public departments selected by the National Board of Health...

  1. Group Psychotherapy in Denmark.

    Science.gov (United States)

    Jørgensen, Lars Bo; Thygesen, Bente; Aagaard, Søren

    2015-10-01

    This is a short article on the history and training standards in the Institute of Group Analysis in Copenhagen (IGA-CPH). We describe theoretical orientations and influences in the long-term training program and new initiatives, like courses in mentalization-based group treatment and a dynamic short-term group therapy course, as well as research in group psychotherapy in Denmark. Some group analytic initiatives in relation to social issues and social welfare are presented, as well as initiatives concerning the school system and unemployment.

  2. PPP in Denmark

    DEFF Research Database (Denmark)

    Kristiansen, Kristian

    2009-01-01

    It is the aim of the paper to contribute to the discussion on restating the PPP principles. The paper is based on an ongoing research project: ”Procuring Facilities Management through PPP´s”. A review of litterature with a critical, but positive attitude towards PPP is given. An overview of PPP...... in Denmark is presented. Only a few PPP´s have been initiated and though more might be in the pipeline, it is likely that the market for PPP is too small. Government policy is positive toward PPP. Private financing is not seen as an essential part of PPP. Attitudes among participants in PPP isare described...

  3. Country Report. Denmark

    DEFF Research Database (Denmark)

    Henriksen, Lars Skov

    2018-01-01

    As a small, open economy Denmark has a pursued a distinct path of capitalist production that relies heavily on innovation in design, production and administration and, therefore, a deliberate dependency on sophisticated information technology and intellectual property. The state has long since...... and business community appears to rely less on penal prosecution than technology-driven and community-supported early warning. The state stresses prevention, detection and technical counter-measures through voluntary cooperation by affected public authorities and private enterprises; only in militarily...

  4. The new Denmark

    DEFF Research Database (Denmark)

    Guglielmi, Michel

    2005-01-01

    Many countries are confronting challenges of moving internal borders as well as borders of tolerance. Territories and borders are like many aspects of life affected by change and rationalism in a globalised world. The New Denmark, which is about restructuring municipals, is very much concerned...... with local considerations but can at the same time point out more general themes on territorial dislocations. Our intend is to use different layers of information to investigate and map specific patterns and use them as a tools for designing possible solutions to problems related to the loss of identity...

  5. Denmark country report 2016

    DEFF Research Database (Denmark)

    Bloksgaard, Lotte; Rostgaard, Tine

    2016-01-01

    The LP&R network produces an annual review of leave policies and related research, starting in 2004. The review covers Maternity, Paternity and Parental leaves; leave to care for sick children and other employment-related measures to support working parents; and early childhood education and care....... In addition to the new country, these are: Australia, Austria, Brazil, Belgium, Canada, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Israel, Italy, Japan, Lithuania, Luxembourg, Malta, Mexico, Netherlands, New Zealand, Norway, Poland, Portugal...

  6. Denmark country note

    DEFF Research Database (Denmark)

    Bloksgaard, Lotte; Rostgaard, Tine

    2014-01-01

    The LP&R network produces an annual review of leave policies and related research, starting in 2004 (for earlier reviews, go to Archive 2005-2013). The review covers Maternity, Paternity and Parental leaves; leave to care for sick children and other employment-related measures to support working......, Israel. Altogether, it covers 35 countries. In addition to Israel, these are: Austria, Australia, Belgium, Brazil, Canada, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Lithuania, Luxembourg, Netherlands, New Zealand, Norway, Poland...

  7. Country Report Denmark

    DEFF Research Database (Denmark)

    Savin, Andrej

    The ePrivacy Directive has been implemented in Denmark through a range of legislative instruments, beginning with the Act on Electronic Communications and Services but leading into more important Executive Order on Provision of Electronic Services and the Cookie Order. This structure could...... be confusing for outsiders as it involves several acts, all of which are concerned not just with one but with several directives. The use of ministerial orders can be explained by the need to introduce flexibility into the fast-changing area, but avoiding a lengthy and complicated full legislative process....

  8. Iodine intake in Denmark

    International Nuclear Information System (INIS)

    Pedersen, K.M.; Noehr, S.B.; Laurberg, P.

    1997-01-01

    Iodine deficiency with a high frequency of goitre and, in severely affected areas, cretinism is common in some areas of the world. In Denmark the iodine intake as evaluated by urinary iodine excretion has been at a stable low level for many years, except for the part of the population now taking iodine supplementation as part of vitamin/mineral preparations. The iodine intake is lowest in the western part to the country where an epidemiological study of elderly subjects has demonstrated a high frequency of goitre and hyperthyroidism in women. This supports the suggestion of a controlled moderate increase in iodine intake via an iodine supplementation program. (au) 40 refs

  9. Culture Wars in Denmark

    DEFF Research Database (Denmark)

    Ørum, Tania

    2016-01-01

    In the 1960s high and low culture were brought into sharp conflict i Denmark. In 1961 a Ministry of Culture was established for the first time. The first minister of culture, the social democrat Julius Bomholt, saw art and culture as an important part of education for democracy that should be made...... available to everyone. The general public, however, raised demands for more popular and relaxing entertainment. The confrontation between the cultural elite and popular opinion escalated to a series of veritable culture wars....

  10. Graduation in Denmark

    DEFF Research Database (Denmark)

    Warburg, Margit

    2009-01-01

    all the characteristics of a rite of passage. The graduates wear a traditional cap with a cross as cockade emblem; this special cross is a symbol of Denmark. For graduates of non-Christian background, alternative cockade emblems are available, e.g. a Star of David or a crescent; this shows...... that the cross emblem is also perceived as a Christian symbol. Social anthropologists Sally Moore and Barbara Myerhoff have suggested a scheme of the categories of religious versus scared for analysing secular rituals where religious symbols are sometimes exhibited. The applicability of their approach...

  11. Suburban development in Denmark

    DEFF Research Database (Denmark)

    Bech-Danielsen, Claus

    2013-01-01

    In this paper I focus on current projects and activities aiming at renewal and revitalisation of Danish suburban areas. In the last five years several activities have been initiated in order to discuss possibilities and strategies for the future development of the suburban areas in Denmark. A Thi...... original developed. On this background the paper raise the question, if ‘dynamic change’ is in fact the primary goal.......In this paper I focus on current projects and activities aiming at renewal and revitalisation of Danish suburban areas. In the last five years several activities have been initiated in order to discuss possibilities and strategies for the future development of the suburban areas in Denmark. A Think...... Tank has published a report, books and political statements have pointing to the suburban areas as important focal points for future developments, and a number of architectural competitions have been launched. The paper is based on review of these acitivities. It is pointed out, that ‘cultural heritage...

  12. Risoe Research Establishment, Denmark

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1973-07-01

    On the poetic Roskilde Fjord, 40 kilometers from Copenhagen, and near Roskilde, capital of Denmark in the 12th century, stands the Risoe Research Establishment of the Danish Atomic Energy Commission. ere 700 men and women are engaged in searching for ways in which atomic energy can be used to make the world a better and healthier place. The work at Risoe comprises fundamental research, reactor technology and other technological studies, agricultural research and health and safety studies. Nuclear power stations are scheduled to be operative in Denmark some time between 1975 and 1980, and the planning of these stations and development of the many processes this will involve has become a major task at Risoe. Special conditions have to be fulfilled in selecting the site of an atomic research station, and the barren Risoe peninsula had them all: safety, because the site was free from buildings to permit continuous control; closeness to the scientific institutions of the capital, Copenhagen; social amenities in Roskilde; finally, access to an a adequate water supply. his special series of photos covering some aspects of the work and safety conditions at Risoe was commissioned by WHO. (author)

  13. Risoe Research Establishment, Denmark

    International Nuclear Information System (INIS)

    1973-01-01

    On the poetic Roskilde Fjord, 40 kilometers from Copenhagen, and near Roskilde, capital of Denmark in the 12th century, stands the Risoe Research Establishment of the Danish Atomic Energy Commission. ere 700 men and women are engaged in searching for ways in which atomic energy can be used to make the world a better and healthier place. The work at Risoe comprises fundamental research, reactor technology and other technological studies, agricultural research and health and safety studies. Nuclear power stations are scheduled to be operative in Denmark some time between 1975 and 1980, and the planning of these stations and development of the many processes this will involve has become a major task at Risoe. Special conditions have to be fulfilled in selecting the site of an atomic research station, and the barren Risoe peninsula had them all: safety, because the site was free from buildings to permit continuous control; closeness to the scientific institutions of the capital, Copenhagen; social amenities in Roskilde; finally, access to an a adequate water supply. his special series of photos covering some aspects of the work and safety conditions at Risoe was commissioned by WHO. (author)

  14. Immigration and Religion in Denmark

    DEFF Research Database (Denmark)

    Christoffersen, Lisbet

    2009-01-01

    An overview over legal framework for immigration into Denmark, special clauses on religion as a parameter for residence permit and asylum in churches......An overview over legal framework for immigration into Denmark, special clauses on religion as a parameter for residence permit and asylum in churches...

  15. Denmark's national inventory report 2006

    DEFF Research Database (Denmark)

    Illerup, Jytte Boll; Lyck, Erik; Nielsen, Ole-Kenneth

    This report is Denmark's National Inventory Report reported to the Conference of the Parties under the United Nations Framework Convention on Climate Change (UNFCCC) due by April 2006. The report contains information on Denmark's inventories for all years' from 1990 to 2004 for CO....

  16. Total hip arthroplasty in Denmark

    DEFF Research Database (Denmark)

    Pedersen, Alma Becic; Johnsen, Søren Paaske; Overgaard, Søren

    2005-01-01

    The annual number of total hip arthroplasties (THA) has increased in Denmark over the past 15 years. There is, however, limited detailed data available on the incidence of THAs.......The annual number of total hip arthroplasties (THA) has increased in Denmark over the past 15 years. There is, however, limited detailed data available on the incidence of THAs....

  17. Public accountability procedures in Denmark

    DEFF Research Database (Denmark)

    Jamison, Andrew; Møhl, Terkel

    2004-01-01

    The article raises questions as - who is responsible for environmental and tehnological policy in Denmark? And how are those 'policymakers' made accountable to the public for their decisions?......The article raises questions as - who is responsible for environmental and tehnological policy in Denmark? And how are those 'policymakers' made accountable to the public for their decisions?...

  18. A Church History of Denmark

    DEFF Research Database (Denmark)

    Lausten, Martin Schwarz

    A Church History of Denmark from the Missionary periode, through the Middle Ages, the Lutheran Reformation, the Ortodoxy, Pietisme, Enlightenment and det History of the 19. and 20. century......A Church History of Denmark from the Missionary periode, through the Middle Ages, the Lutheran Reformation, the Ortodoxy, Pietisme, Enlightenment and det History of the 19. and 20. century...

  19. Electrical conductivity of sandstone, limestone, and granite

    Energy Technology Data Exchange (ETDEWEB)

    Duba, A.; Piwinskii, A.J.; Santor, M.; Weed, H.C.

    1978-01-01

    The electrical conductivity of cylindrical cores of Westerly granite, Indiana limestone and Nugget, St Peter and Kayenta sandstones was measured at about 25/sup 0/C in vacuo, in air, and after saturation in distilled water, tap water, and 0.1 M NaCl solution. The three-electrode technique with a guard ring and the two-electrode technique without a guard ring were used. Core aspect ratio over the range of 2.00 to 0.25, as well as frequency over the range of 50 Hz to 10 kHz, influences the conductivity of all rocks, especially those measured in vacuo. Measurements from water-saturated samples using a guard ring are not appreciably different from those obtained without a guard ring. The conductivity of rocks saturated in 0.1 M NaCl solution changes least with a change in aspect ratio; for these rocks a linear relationship, known as Archie's Law, exists between log porosity and log conductivity. No simple correlation was found between those factors in rocks saturated with tap or distilled water. Thus, it appears Archie's Law is of questionable value for correlating laboratory data from rocks saturated with low-conductivity fluids.

  20. Residual CO2 trapping in Indiana limestone.

    Science.gov (United States)

    El-Maghraby, Rehab M; Blunt, Martin J

    2013-01-02

    We performed core flooding experiments on Indiana limestone using the porous plate method to measure the amount of trapped CO(2) at a temperature of 50 °C and two pressures: 4.2 and 9 MPa. Brine was mixed with CO(2) for equilibration, then the mixture was circulated through a sacrificial core. Porosity and permeability tests conducted before and after 884 h of continuous core flooding confirmed negligible dissolution. A trapping curve for supercritical (sc)CO(2) in Indiana showing the relationship between the initial and residual CO(2) saturations was measured and compared with that of gaseous CO(2). The results were also compared with scCO(2) trapping in Berea sandstone at the same conditions. A scCO(2) residual trapping end point of 23.7% was observed, indicating slightly less trapping of scCO(2) in Indiana carbonates than in Berea sandstone. There is less trapping for gaseous CO(2) (end point of 18.8%). The system appears to be more water-wet under scCO(2) conditions, which is different from the trend observed in Berea; we hypothesize that this is due to the greater concentration of Ca(2+) in brine at higher pressure. Our work indicates that capillary trapping could contribute to the immobilization of CO(2) in carbonate aquifers.

  1. Extreme winds in Denmark

    DEFF Research Database (Denmark)

    Kristensen, L.; Rathmann, Ole; Hansen, S.O.

    1999-01-01

    Wind-speed data from four sites in Denmark have been analyzed in order to obtain estimates of the basic wind velocity which is defined as the 50-year wind speed under standard conditions, i.e. ten-minute averages at the height 10 m over a uniform terrainwith the roughness length 0.05 m. The sites...... by means of the geostrophic drag law for neutral stratification. The basic wind velocity in 30o sectors are obtainedthrough ranking of the largest values of the ¤friction velocity pressure¤ 1/2 ¤#rho#¤¤u¤"2_x taken both once every two months and once every year. The main conclusion is that the basic wind...

  2. Management development in Denmark

    DEFF Research Database (Denmark)

    Leth, Camilla; Hjalager, Anne-Mette; Holt Larsen, Henrik

    2003-01-01

    This report contains the major results from a study of management development in Danishorganizations. The study is part of a European research project with participation ofDenmark, the U.K, France, Norway, Rumania, Spain, and Germany. The project is part ofthe so-called Leonardo program the purpose...... of which is to further cross-countrycompetence development and collaboration within the European educational sector. Thefirst phase of the project is a quantitative interview study of one hundred organizations ineach of the participating countries. The second phase consists in qualitative case studiesin...... be published in books, journals and newspaper articles. Hopefully the findings of thelarge European project will thus affect the way in which educational institutions andorganizations manage the `Europeanization' of management development.The present report solely describes significant findings from...

  3. Extreme winds in Denmark

    DEFF Research Database (Denmark)

    Kristensen, L.; Rathmann, O.; Hansen, S.O.

    2000-01-01

    (Technical Report, Danish Technical press, 1970) and by Abild (Technical Report R-522 (EN), Riso National Laboratory, 1994). A short discussion of the wind storm on the 3rd of December 1999 is included. It is demonstrated how the data can be applied to non-standard situations where the roughness length......Wind-speed data from four sites in Denmark have been analyzed in order to obtain estimates of the basic wind velocity, defined as the 50 yr wind speed (10 min averages) under standard conditions, i.e., 10 m over a homogeneous terrain with the roughness length 0.05 m, The sites are Skjern (15 yr......), Kegnaes (7 yr), Sprogo (20 yr), and Tystofte (16 yr). The measured data are wind speed, wind direction, temperature and pressure. The wind records are cleaned for terrain effects by means of WASP (Mortensew ct al., Technical Report I-666 (EN), Riso National Laboratory, 1993. Vol. 2. User's Guide...

  4. Think tanks in Denmark

    DEFF Research Database (Denmark)

    Blach-Ørsten, Mark; Kristensen, Nete Nørgaard

    2016-01-01

    outside the media. The study shows that the two largest and oldest think tanks in Denmark, the liberal think tank CEPOS and the social democratic think tank ECLM, are very active and observable in the media; that the media’s distribution of attention to these think tanks, to some extent, confirms a re......-politicization of Danish newspapers; but also that the news media as an arena of influence is only one part of the equation, since some of the corporatist political networks are still intact and working outside the media...... half of the 2010s, because in this national setting think tanks are still a relatively new phenomenon. Based on theories of mediatization and de-corporatization, we present 1) an analysis of the visibility of selected Danish think tanks in the media and 2) an analysis of their political networks...

  5. MOBILIZING KNOWLEDGE IN DENMARK

    DEFF Research Database (Denmark)

    Holm, Claus

    2011-01-01

    Knowledge mobilization is not only a new expression in a Danish context. It is also an interesting concept to introduce and discuss. For doesn’t knowledge mobilization have more – or, at least, as much – to do with politics as with education research or education in itself? Doesn’t modern knowledge...... mobilization have to do with a new political will to mobilize the population by creating a connection between education research and education? On the basis of this report on the Danish efforts with respect to ’knowledge mobilization’, these questions can be answered affirmatively; the extent of knowledge...... competition state – that is to be realized by fulfilling the ambitions for comprehensive knowledge mobilization through education.1 On the other hand, Denmark is having a hard time finding a broad consensus when what is, in principle, supposed to be a common political will is to be translated into knowledge...

  6. LUTETIAN LIMESTONES IN THE PARIS REGION: PETROGRAPHIC AND COMPOSITIONAL EXAMINATION

    International Nuclear Information System (INIS)

    BLANC, A.; HOLMES, L.L.; HARBOTTLE, G.

    1998-01-01

    Stone for building and decorating monuments in the Paris Basin from antiquity to the present came from numerous quarries in the Lutetian limestone formations of the region. To identify specific-stone sources used for masonry and sculptures in these monuments, a team of geologists and archaeologists has investigated 300 quarries and collected 2,300 limestone samples for study in a collaborative effort by geologists and chemists. Petrographic and paleontologic examinations of thin sections enable geologists to distinguish the Tertiary Lutetian limestones from similar stone in Jurassic and Cretaceous strata. The methods of the geologist have been supplemented by those of the chemist whose compositional studies by neutron activation analysis can differentiate among the fine-grained upper Lutetian limestones extracted from specific ancient quarries

  7. Improving DMS 9210 requirements for limestone rock asphalt - final report.

    Science.gov (United States)

    2015-03-01

    Limestone Rock Asphalt (LRA) mixtures have been produced and placed for several decades using : specification requirements currently listed under DMS 9210. Several districts have had placement issues : and premature failures at the beginning of 2010....

  8. Limestone doses affecting mineral contents in tropical grass forage

    International Nuclear Information System (INIS)

    Armelin, M.J.A.; Saiki, M.

    2005-01-01

    Field trial was performed at the experimental farm of Southeast Embrapa Cattle, Sao Carlos - SP, Brazil, on a 16 year old Brachiaria decumbens pasture, grown on a distrophic Hapludox (Oxisol), recovered by the use of limestone and fertilizer. The experiments were carried out in random blocks, with 6 replications and 5 treatments. The 100 m 2 blocks were established in the pasture. Each block received a sequence of limestone doses of 0, 1, 2, 4 and 8 t/ha. The forage samples were taken one year after limestone application on soil surface. Instrumental neutron activation analysis (INAA) followed by gamma-ray spectrometry was the analytical method used to determine mineral contents. The statistical analysis showed a negative linear correlation of Br, Co, Cr, Mn and Zn contents in forage with the limestone doses, while the uptake of Mg was affected in a positive way. (author)

  9. The Blasphemy Ban in Denmark

    DEFF Research Database (Denmark)

    Binderup, Lars Grassmè; Lassen, Eva Maria

    2017-01-01

    , it can seem odd why Denmark would not have followed the trend of most other European states, including those with which Denmark normally compares itself, to abolish the article. Denmark is a highly secularised society with generally a relaxed attitude towards religion. And finally, surveys indicate...... the potential to bring the ban on blasphemy back to life by bringing it into play with penal systems of other countries with blasphemy laws. The article proceeds to outline the reactions of international human rights bodies to art. 140, focussing on the statement of the UN Special Rapporteur on Religion...

  10. A Metagenomic Survey of Limestone Hill in Taiwan

    Science.gov (United States)

    Hsu, Y. W.; Li, K. Y.; Chen, Y. W.; Huang, T. Y.; Chen, W. J.; Shih, Y. J.; Chen, J. S.; Fan, C. W.; Hsu, B. M.

    2016-12-01

    The limestone of Narro-Sky in Tainliao, Taiwan is of Pleistocene reef limestones interbedded in clastic layers that covered the Takangshan anticlines. Understanding how microbial relative abundance was changed in response to changes of environmental factors may contribute to better comprehension of roles that microorganisms play in altering the landscape structures. In this study, microorganisms growing on the wall of limestone, in the water dripping from the limestone wall and of soil underneath the wall were collected from different locations where the environmental factors such as daytime illumination, humidity, or pH are different. Next generation sequencing (NGS) was carried out to examine the compositions and richness of microbial community. The metagenomics were clustered into operational taxonomic units (OTUs) to analyze relative abundance, diversities and principal coordinates analysis (PCoA). Our results showed the soil sample has the highest alpha diversity while water sample has the lowest. Four major phyla, which are Proteobacteria, Acidobacteria, Actinobacteria, and Cyanobacteria, account for 80 % of total microbial biomass in all groups. Cyanobacteria were found most abundantly in limestone wall instead of water or soil of weathering limestone. The PCoA dimensional patterns of each phylum showed a trace of microbial community dynamic changes, which might be affected by environmental factors. This study provides the insights to understand how environmental factors worked together with microbial community to shape landscape structures.

  11. Converting SDAP into gypsum in a wet limestone scrubber

    Energy Technology Data Exchange (ETDEWEB)

    Fogh, F [Faelleskemikerne, Elsamprojekt A/S, Fredericia (Denmark)

    1996-12-01

    The ELSAM power pool has an installed electrical capacity of approx. 5 GW{sub e}, mainly firing import coal. The major base load units are equipped with desulphurization units and three different desulphurization technologies are used: the wet limestone gypsum process, the spray dry absorption process and a sulphuric acid process. Gypsum and sulphuric acid are commercialized, whereas it has been difficult to utilize the spray dry absorption product (SDAP). The main constituents of SDAP are calcium sulphide, calcium chloride, hydrated lime and impurities mainly originating from fly ash. Sulphide can be oxidized into sulphate in acidic solution - the reaction is utilized in the wet limestone gypsum process - and the possibility of using any spare capacity in the wet limestone gypsum units to oxidize the sulphide content of SDAP into sulphate and produce usable gypsum has been investigated in the laboratory and in a 400 MW{sub e} equivalent wet limestone unit. The limestone inhibition effect of the addition of SDAP is currently being studied in the laboratory in order to determine the effect of different SDAP types (plant/coal sources) on limestone reactivity before further long-term full-scale tests are performed and permanent use of the process planned. (EG)

  12. Influence of limestone on the hydration of Portland cements

    International Nuclear Information System (INIS)

    Lothenbach, Barbara; Le Saout, Gwenn; Gallucci, Emmanuel; Scrivener, Karen

    2008-01-01

    The influence of the presence of limestone on the hydration of Portland cement was investigated. Blending of Portland cement with limestone was found to influence the hydrate assemblage of the hydrated cement. Thermodynamic calculations as well as experimental observations indicated that in the presence of limestone, monocarbonate instead of monosulfate was stable. Thermodynamic modelling showed that the stabilisation of monocarbonate in the presence of limestone indirectly stabilised ettringite leading to a corresponding increase of the total volume of the hydrate phase and a decrease of porosity. The measured difference in porosity between the 'limestone-free' cement, which contained less than 0.3% CO 2 , and a cement containing 4% limestone, however, was much smaller than calculated. Coupling of thermodynamic modelling with a set of kinetic equations which described the dissolution of the clinker, predicted quantitatively the amount of hydrates. The quantities of ettringite, portlandite and amorphous phase as determined by TGA and XRD agreed well with the calculated amounts of these phases after different periods of time. The findings in this paper show that changes in the bulk composition of hydrating cements can be followed by coupled thermodynamic models. Comparison between experimental and modelled data helps to understand in more detail the dominating processes during cement hydration

  13. Modeling the influence of limestone addition on cement hydration

    Directory of Open Access Journals (Sweden)

    Ashraf Ragab Mohamed

    2015-03-01

    Full Text Available This paper addresses the influence of using Portland limestone cement “PLC” on cement hydration by characterization of its microstructure development. The European Standard EN 197-1:2011 and Egyptian specification ESS 4756-1/2009 permit the cement to contain up to 20% ground limestone. The computational tools assist in better understanding the influence of limestone additions on cement hydration and microstructure development to facilitate the acceptance of these more economical and ecological materials. μic model has been developed to enable the modeling of microstructural evolution of cementitious materials. In this research μic model is used to simulate both the influence of limestone as fine filler, providing additional surfaces for the nucleation and growth of hydration products. Limestone powder also reacts relatively slow with hydrating cement to form monocarboaluminate (AFmc phase, similar to the mono-sulfoaluminate (AFm phase formed in ordinary Portland cement. The model results reveal that limestone cement has accelerated cement hydration rate, previous experimental results and computer model “cemhyd3d” are used to validate this model.

  14. Thermal properties of the Cobourg Limestone

    Science.gov (United States)

    Pitts, Michelle

    The underground storage of used nuclear fuel in Deep Geologic Repositories (DGRs) has been a subject of research in Canada for decades. One important technical aspect of repository design is the accommodation of the mechanical impacts of thermal inputs (heating) from the fuel as it goes through the remainder of its life cycle. Placement room spacing, a major factor in project cost, will be determined by the ability of the host rock to dissipate heat. The thermal conductivity and linear thermal expansion will determine the evolution of the temperature and thermally-induced stress fields. Thermal processes must be well understood to design a successful DGR. This thesis examines the thermal properties of rocks, how they are influenced by factors such as temperature, pressure, mineralogy, porosity, and saturation; and common methods for calculating and/or measuring these properties. A brief overview of thermal and thermally-coupled processes in the context of DGRs demonstrates the degree to which they would impact design, construction, and operation of these critical structures. Several case histories of major in situ heating experiments are reviewed to determine how the lessons learned could be applied to a Canadian Underground Demonstration Facility (UDF). A mineralogy investigation using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) examines samples of the Cobourg Limestone from the Bowmanville and Bruce sites, and demonstrates geographical variability within the Cobourg Formation. The thermal properties of samples from the Bowmanville site are determined. A divided bar apparatus was constructed and used to measure thermal conductivity. The temperature measurement component of the divided bar apparatus was used to measure linear thermal expansion. Finally, the past investigations into the thermal impact of a DGR are reviewed, and the implications of the laboratory testing results on similar analyses are discussed.

  15. Denmark: a geography of energy

    DEFF Research Database (Denmark)

    Haselip, James Arthur

    2012-01-01

    Since the oil crises of the 1970s, when Denmark was 90% dependent upon imported oil, the country has decoupled economic growth from energy consumption and greatly diversified its sources of energy....

  16. Denmark's National Inventory Report 2018

    DEFF Research Database (Denmark)

    Nielsen, Ole-Kenneth; Plejdrup, Marlene Schmidt; Winther, Morten

    The report documents the methodologies and data used to estimate greenhouse gas emissions from Denmark for the reporting obligations under the European Union, the United Nations Framework Convention on Climate Change and the Kyoto Protocol.......The report documents the methodologies and data used to estimate greenhouse gas emissions from Denmark for the reporting obligations under the European Union, the United Nations Framework Convention on Climate Change and the Kyoto Protocol....

  17. Denmark's National Inventory Report 2009

    DEFF Research Database (Denmark)

    Nielsen, Ole-Kenneth; Lyck, Erik; Mikkelsen, Mette Hjorth

    This report is Denmark's National Inventory Report 2009. The report contains information on Denmark's emission inventories for all years' from 1990 to 2007 for CO2, CH4, N2O, HFCs, PFCs and SF6, NOx, CO, NMVOC, SO2. The report documents the methodology as well as presents activity data and emissi...... factors for energy, industrial processes, sovent and other product use, agriculture, LULUCF (Land-Use, Land-Use Change and Forestry) and waste....

  18. Multidecadal shoreline changes in Denmark

    DEFF Research Database (Denmark)

    Kabuth, Alina Kristin; Kroon, Aart; Pedersen, Jørn Bjarke Torp

    2014-01-01

    Multidecadal shoreline changes along ca. 7000 km coastline around Denmark were computed for the time interval between 1862 AD and 2005 AD and were connected with a geomorphological coastal classification. The shoreline data set was based on shoreline positions from historical and modern topograph...... shoreline changes around Denmark, the mapping can contribute to enhanced adaptation and mitigation strategies in response to increased risks of erosion and flooding under a changing climate....

  19. The windmill industry of Denmark

    International Nuclear Information System (INIS)

    Anon.

    1996-01-01

    Windmills are the strong asset of the Danish exporting industry. The share of the Danish industry of the windmill markets of the world is about 50 %. Denmark exported about 57 % more windmills in 1995 than in 1994. About 1500 different types of windmills, varying from farm-mills to large 600 kW wind power plants were sold abroad and 200 is in operation in Denmark. At present the largest export country of Denmark is Germany where the knowledge of environmental issues has nearly doubled the wind power export from Denmark. Germany produces most wind power in the Europe. The Netherlands is a strong competitor of Denmark in the field of wind power. The windmills sold or constructed abroad are mainly large, modern and effective 500 kW windmills. The annual energy production of a windmill corresponds, under good wind conditions, to the annual energy consumption of 200-300 detached houses. Danish Vestas is launching a 60 m tall, 1.5 MW windmill, the paddle-span of which will be 30 m. A good windmill has to be capable to produce power at least 97 % of the operation time. The remaining 3 % is left for maintenance and reparation of the mills. The maximum power of a windmill is estimated to be 1.5 MW. At present the windmill production employs about 10 000 persons in Denmark

  20. Characterization of DNAPL Source Zone Arcgitecture in Clay Till and Limestone Bedrock by Integrated Site Investigations with Innovative and Current Techniques

    DEFF Research Database (Denmark)

    Broholm, Mette Martina; Janniche, Gry Sander; Fjordbøge, Annika Sidelmann

    facility for perchloroethene (PCE) and trichloroethene (TCE) at the Naverland site near Copenhagen, Denmark, has resulted in PCE and TCE DNAPL impacts to a fractured clay till and an underlying fractured limestone aquifer/bedrock. A range of innovative and current site investigative tools for direct...... with discrete subsampling for quantitative analysis, SudanIV hydrophobic colour test, colour spray test, PID and geologic descriptions; NAPL and FACT FLUTe exposure and discrete FACT subsampling and analysis; liquid sampling from boreholes; and a radon and PCE/TCE soil gas survey. Investigations...

  1. Delineation of fault systems on Langeland, Denmark based on AEM data and boreholes

    DEFF Research Database (Denmark)

    Andersen, Theis Raaschou; Westergaard, Joakim Hollenbo; Pytlich, Anders

    in the fault systems can be observed in the AEM data as a low resistivity layer that clearly distinguish from the underlying and surrounding high resistivity fresh water saturated limestone (footwall block) and the overlying glacial clay till. Soil descriptions from a borehole confirm that the low resistivity...... with boreholes, three fault systems in the northern part of the island of Langeland, Denmark are mapped. Two of the fault systems were unknown prior to the mapping campaign. The two unknown fault systems are interpreted as a normal fault and graben structures, respectively. The presence of the hanging-wall block...

  2. Attrition of limestone by impact loading in fluidized beds

    Energy Technology Data Exchange (ETDEWEB)

    Fabrizio Scala; Fabio Montagnaro; Piero Salatino [Consiglio Nazionale delle Ricerche, Napoli (Italy). Istituto di Ricerche sulla Combustione

    2007-09-15

    The present study addresses limestone attrition and fragmentation associated with impact loading, a process which may occur extensively in various regions of fluidized bed (FB) combustors/gasifiers, primarily the jetting region of the bottom bed, the exit region of the riser, and the cyclone. An experimental protocol for the characterization of the propensity of limestone to undergo attrition/fragmentation by impact loading is reported. The application of the protocol is demonstrated with reference to an Italian limestone whose primary fragmentation and attrition by surface wear have already been characterized in previous studies. The experimental procedure is based on the characterization of the amount and particle size distribution of the debris generated upon the impact of samples of sorbent particles against a target. Experiments were carried out at a range of particle impact velocities between 10 and 45 m/s, consistent with jet velocities corresponding to typical pressure drops across FB gas distributors. The protocol has been applied to either raw or preprocessed limestone samples. In particular, the effect of calcination, sulfation, and calcination/recarbonation cycles on the impact damage suffered by sorbent particles has been assessed. The measurement of particle voidage and pore size distribution by mercury intrusion was also accomplished to correlate fragmentation with the structural properties of the sorbent samples. Fragmentation by impact loading of the limestone is significant. Lime displays the largest propensity to undergo impact damage, followed by the sorbent sulfated to exhaustion, the recarbonated sorbent, and the raw limestone. Fragmentation of the raw limestone and of the sulfated lime follows a pattern typical of the failure of brittle materials. The fragmentation behavior of lime and recarbonated lime better conforms to a disintegration failure mode, with an extensive generation of very fine fragments. 27 refs., 9 figs. 1 tab.

  3. Performance of japanese quails fed feeds containing different corn and limestone particle sizes

    Directory of Open Access Journals (Sweden)

    DA Berto

    2007-09-01

    Full Text Available This study aimed at evaluating performance and egg quality of Japanese quails fed feeds containing different corn and limestone particle sizes. A total number of 648 birds in the peak of production was distributed in a random complete block experimental design, using a 2x3 factorial arrangement (2 corn particle sizes and 3 limestone particle sizes. Birds were designated to one of two blocks, with six replicates of 18 birds each. Mean geometric diameter (MGD values used were 0.617mm and 0.723mm (corn fine and coarse particle sizes, respectively, and 0.361mm, 0.721mm, and 0.947mm (limestone fine, intermediate and coarse particle sizes, respectively. The following treatments were applied: T1: fine corn feed, with 100% fine limestone; T2: fine corn feed, with 50% fine limestone and 50% intermediate limestone; T3: fine corn feed, with 50% fine limestone and 50% coarse limestone; T4: coarse corn feed, with 100% fine limestone; T5: coarse corn feed, with 50% fine limestone and 50% intermediate limestone; T6: coarse corn feed, with 50% fine limestone and 50% coarse limestone. The experiment lasted 112 days, consisting of 4 cycles of 28 days. No significant interaction was observed among corn and limestone particle sizes for any of the analyzed parameters. There were no significant effects (p>0.05 of the tested corn particle sizes on quail performance or egg quality. There were significant (p<0.05 isolated effects of limestone particle size only on the percentage of cracked eggs, which was reduced when birds fed 50% coarse limestone (0.947mm and 50% fine limestone (0.361mm as compared to those fed 100% fine limestone. Therefore, the inclusion of 50% coarse limestone (0.947mm is recommended for quail egg production.

  4. CALCIUM OXIDE CHARACTERISTICS PREPARED FROM AMBUNTEN’S CALCINED LIMESTONE

    Directory of Open Access Journals (Sweden)

    Fatimatul Munawaroh

    2018-05-01

    Full Text Available Calcium oxide (CaO and calcium carbonate (CaCO3 are widely used in industry. CaO and CaCO3 can be synthesized or derived from limestone. The purpose of this study to determine the characteristics of CaO calcined limestone from Ambunten Sumenep. Lime in calcined at 850 ° C for 6 hours. Characterization of X-ray fluorescence (XRF was conducted to determine the chemical composition of limestone, X-ray diffraction test (XRD to find the lime crystalline phase and FTIR test to determine the absorption of wave number. XRF test results showed that the limestone chemical composition consisted of Ca of 95.37% as the dominant element, Mg of 4.1%, Fe 0.17% and Y by 0.39%. The XRD test results showed that the limestone crystal phase is ankerite (Ca [Fe, Mg] [CO3] 2 and after the calcined phase calcination is vaterite (Ca [OH] 2, calcite (CaO and calcite (CaCO3. While the FTIR test results show that the CaO spectra are seen at 3741.24, 1417.12 and 874.14 cm-1.

  5. Modifying the properties of finely ground limestone by tumbling granulation

    Science.gov (United States)

    Macho, Oliver; Eckert, Maroš; Tomášová, Barbora; Peciar, Peter; Ščasný, Martin; Fekete, Roman; Peciar, Marián

    2016-06-01

    Calcium carbonate in the form of finely ground limestone is a material that has found its application in a wide range of industries, in the chemical, rubber, agricultural, and paper industries, is used for desulfurization of boilers and other. In civil engineering, ground limestone is used for the production of building materials, plaster and mortar mixtures, as a filler in concrete mixtures, in road construction, and as an essential component of mastic asphalt. This paper deals with examining the modification of the properties of finely ground limestone by the tumbling agglomeration method. It has been shown that the components of concrete with a round grain have a positive effect on the pumping of concrete in comparison with an elongated grain or the rough surface of crushed stone. The experiments will be carried out on a granulation plate using a variety of granulation liquid. The agglomerates and their properties were compared with untreated finely ground limestone, with a focus on detecting changes in compressibility, density and particle size. The output of this paper is a description and graphical representation of the changes in the properties of ground limestone before and after the agglomeration process.

  6. Characterization of Limestone as Raw Material to Hydrated Lime

    Science.gov (United States)

    Salem Hwidi, Rajeb; Nuraiti Tengku Izhar, Tengku; Saad, Farah Naemah Mohd

    2018-03-01

    In Malaysia, limestone is essentially important for the economic growth as raw materials in the industry sector. Nevertheless, a little attention was paid to the physical, chemical, mineralogical, and morphological properties of the limestone using X-ray fluorescence (X-RF), X-ray diffraction (X-RD), Fourier transform infrared spectroscopy (FTIR), and Scanning electron microscopy / energy dispersive x-ray spectroscopy (SEM-EDS) respectively. Raw materials (limestone rocks) were collected from Bukit Keteri area, Chuping, Kangar, Perlis, Malaysia. Lab crusher and lab sieved were utilized to prepare five different size of ground limestone at (75 µm, 150 µm, 225 µm, 300, and 425 µm) respectively. It is found that the main chemical composition of bulk limestone was Calcium oxide (CaO) at 97.58 wt.% and trace amount of MnO, Al2O3, and Fe2O3 at 0.02%, 0.35%, and 0.396% respectively. XRD diffractograms showed characteristic peaks of calcite and quartz. Furthermore, main FTIR absorption bands at 1,419, 874.08 and 712.20 cm-1 indicated the presence of calcite. The micrographs showed clearly the difference of samples particle size. Furthermore, EDS peaks of Ca, O, and C elements confirmed the presence of CaCO3 in the samples.

  7. Modifying the properties of finely ground limestone by tumbling granulation

    Directory of Open Access Journals (Sweden)

    Macho Oliver

    2016-06-01

    Full Text Available Calcium carbonate in the form of finely ground limestone is a material that has found its application in a wide range of industries, in the chemical, rubber, agricultural, and paper industries, is used for desulfurization of boilers and other. In civil engineering, ground limestone is used for the production of building materials, plaster and mortar mixtures, as a filler in concrete mixtures, in road construction, and as an essential component of mastic asphalt. This paper deals with examining the modification of the properties of finely ground limestone by the tumbling agglomeration method. It has been shown that the components of concrete with a round grain have a positive effect on the pumping of concrete in comparison with an elongated grain or the rough surface of crushed stone. The experiments will be carried out on a granulation plate using a variety of granulation liquid. The agglomerates and their properties were compared with untreated finely ground limestone, with a focus on detecting changes in compressibility, density and particle size. The output of this paper is a description and graphical representation of the changes in the properties of ground limestone before and after the agglomeration process.

  8. Initial kinetics of the direct sulfation of limestone

    DEFF Research Database (Denmark)

    Hu, Guilin; Shang, Lei; Dam-Johansen, Kim

    2008-01-01

    The initial kinetics of direct sulfation of Faxe Bryozo, a porous bryozoan limestone was studied in the temperature interval from 873 to 973 K in a pilot entrained flow reactor with very short reaction times (between 0.1 and 0.6 s). The initial conversion rate of the limestone - for conversions...... less than 0.3% - was observed to be significantly promoted by higher SO2 concentrations and lower CO2 concentrations, whereas 02 showed negligible influence. A mathematical model for the sulfation of limestone involving chemical reaction at calcite grain surfaces and solid-state diffusion of carbonate...... ions in calcite grains is established. The validity of the model is limited to the initial sulfation period, in which nucleation of the solid product calcium sulphate is not started. This theoretical reaction-diffusion model gives a good simulation of the initial kinetics of the direct sulfation...

  9. Limestone attrition under simulated oxyfiring Fluidized-Bed combustion conditions

    Energy Technology Data Exchange (ETDEWEB)

    Scala, F. [Istituto di Ricerche sulla Combustione - CNR, Napoli (Italy); Salatino, P. [Dipartimento di Ingegneria Chimica - Universita degli Studi di Napoli Federico II, Napoli (Italy)

    2009-03-15

    Limestone attrition by surface wear was studied during the flue gas desulfurization under simulated fluidized-bed (FB) oxyfiring conditions and hindered calcination. Bench-scale experimental tests were carried out using well-established techniques previously developed for the characterization of sulfation and attrition of sorbents in air-blown atmospheric FB combustors. The experimental limestone conversion and attrition results were compared with those previously obtained with the same limestone under simulated air-blown combustion conditions. The differences in the conversion and attrition extents and patterns associated with oxyfiring as compared to air-blown atmospheric combustion were highlighted and related to the different particle morphologies and thicknesses of the sulfate layer. It was noted that attrition could play an important role in practical circulating FB combustor operation, by effectively enhancing particle sulfation under both oxyfiring and air-blown combustion conditions. (Abstract Copyright [2009], Wiley Periodicals, Inc.)

  10. Characterization of limestone of region South and Southeast of Para

    International Nuclear Information System (INIS)

    Marinho, A.R.O.; Vieira, J.H.A.; Antunes Junior, L.V.; Medeiros, A.C.; Souza, G.P.

    2014-01-01

    Limestone is used in daily activities, and it is common the use of products containing calcium carbonate in various applications, from construction to food production, air purification to sewage treatment, the sugar refining materials for the toothpaste, the manufacture of glass and steel in the manufacture of paper, plastics, paints, ceramics and many others. The Limestone present in the region of south and southeast of Para is presented in deposits that have not been explored on a large scale, being justified a deepening in characteristics thereof. For the characterization of the material, gross samples were comminuted by crushing and ball mill, sieved and then separated into aliquots. In the end were used fluorescence analysis of X-ray, diffraction X-rays, determination of the moisture and loss on ignition of the material at 950 °C for one hour, obtaining results of a dolomitic limestone. (author)

  11. Elderly Turkish Migrants in Denmark

    DEFF Research Database (Denmark)

    Blaakilde, Anne Leonora; Petersen, Signe Sofia Gronwald; Yazici, Suzan

    and a higher proportion of self-reported illness and are in higher risk of health problems and morbidity than their Danish counterparts. Furthermore, their health differences increase more by age. The research project aimed at finding possible explanations for these differences among Turkish and ethnic Danish......Elderly Turkish migrants in Denmark: Health in a life course perspective Objective According to Statistics Denmark, Turkish immigrants constitute the largest immigrant group in Denmark with 1.1% of the population (60,390 people) in 2012. They account for a higher rate of chronic ailments...... elderly people by studying the every day life of elderly Turkish migrants. Methods Qualitative interviews were carried out with 12 Turkish men and 18 women aged 54-80. The interviews had a focus on their health practices and health perceptions in a life history perspective. The interviews were...

  12. Corporatism in Denmark and Norway

    DEFF Research Database (Denmark)

    Simonsen, Mikkel Mailand

    2009-01-01

    The literature of corporatism tends to bypass most Scandinavian countries and ignore state-social partner relations not related to wage bargaining and income policy. This contribution attempts to overcome both these shortcomings. It concludes that corporatism is alive in Denmark and Norway......, in Norway ‘peak-level' corporatism on wage setting remains stronger than in Denmark, whereas ‘meso-level' corporatism (corporatism in specific policy area) is stronger in Denmark than in Norway........ The social partners have, as general rule, been involved in formulating and implementing changes in welfare state policies, and corporatist arrangements are also seen in relation to some industrial relations issues. The two countries share a number of contextual features important for corporatism. However...

  13. Effect of SO2 Dry Deposition on Porous Dolomitic Limestones

    Directory of Open Access Journals (Sweden)

    Florica Doroftei

    2010-01-01

    Full Text Available The present study is concerned with the assessment of the relative resistance of a monumental dolomitic limestone (Laspra – Spain used as building material in stone monuments and submitted to artificial ageing by SO2 dry deposition in the presence of humidity. To investigate the protection efficiency of different polymeric coatings, three commercially available siloxane-based oligomers (Lotexan-N, Silres BS 290 and Tegosivin HL 100 and a newly synthesized hybrid nanocomposite with silsesquioxane units (TMSPMA were used. A comparative assessment of the data obtained in this study underlines that a better limestone protection was obtained when treated with the hybrid nanocomposite with silsesquioxane units.

  14. Novel Hydroxyapatite Coatings for the Conservation of Marble and Limestone

    Science.gov (United States)

    Naidu, Sonia

    Marble and limestone are calcite-based materials used in the construction of various structures, many of which have significant artistic and architectural value. Unfortunately, due to calcite's high dissolution rate, these stones are susceptible to chemically-induced weathering in nature. Limestone, due to its inherent porosity, also faces other environmental weathering processes that cause weakening from disintegration at grain boundaries. The treatments presently available are all deficient in one way or another. The aim of this work is to examine the feasibility of using hydroxyapatite (HAP) as a novel protective coating for marble and limestone, with two goals: i) to reduce acid corrosion of marble and ii) to consolidate physically weathered limestone. The motivation for using HAP is its low dissolution rate and structural compatibility with calcite. Mild, wet chemical synthesis routes, in which inorganic phosphate-based solutions were reacted with marble and limestone, alone and with other precursors, were used to produce HAP films. Film nucleation, growth and phase evolution were studied on marble to understand film formation and determine the optimal synthesis route. An acid resistance test was developed to investigate the attack mechanism on marble and quantify the efficacy of HAP-based coatings. Film nucleation and growth were dependent on substrate surface roughness and increased with calcium and carbonate salt additions during synthesis. Acid attack on marble occurred via simultaneous dissolution at grain boundaries, twin boundaries and grain surfaces. HAP provided intermediate protection against acid attack, when compared to two conventional treatments. Its ability to protect the stone from acid was not as significant as predicted from dissolution kinetics and this was attributed to incomplete coverage and residual porosity within the film, arising from its flake-like crystal growth habit, which enabled acid to access the underlying substrate. The

  15. Green tax reform in Denmark

    DEFF Research Database (Denmark)

    Andersen, Mikael Skou

    1994-01-01

    Energy, transport and fuel taxes in Denmark have, since the late 1970s, been among the highest in the OECD, and raise already more than 30 billion DKK annually to cover 10-12 per cent of the state household: a share that will be increased over the next five years with new green taxes. Furthermore......, Denmark is currently the only country within the European Union which has introduced a tax on CO2; although Germany and the Netherlands are also considering doing so, the Danish CO2 tax has been effective since 1 January 1993....

  16. The Western Denmark Heart Registry

    DEFF Research Database (Denmark)

    Schmidt, Morten; Maeng, Michael; Madsen, Morten

    2018-01-01

    The WDHR (Western Denmark Heart Registry) is a seminational, multicenter-based registry with longitudinal registration of detailed patient and procedure data since 1999. The registry includes as of January 1, 2017 approximately 240,000 coronary angiographies, 90,000 percutaneous coronary interven......The WDHR (Western Denmark Heart Registry) is a seminational, multicenter-based registry with longitudinal registration of detailed patient and procedure data since 1999. The registry includes as of January 1, 2017 approximately 240,000 coronary angiographies, 90,000 percutaneous coronary...

  17. Hepatitis B prevalence in Denmark

    DEFF Research Database (Denmark)

    Hansen, N; Hay, G; Cowan, S

    2013-01-01

    The prevalence of chronic hepatitis B virus (HBV) infection in Denmark is not clear. The primary aim of this study was to estimate the prevalence of chronic HBV infection in Denmark. The capture–recapture method was used to estimate the total population diagnosed with chronic HBV infection......, and the capture–recapture estimate of the total population diagnosed with chronic hepatitis B was 7,112 (95% confidence interval (CI): 6,953–10,747). Only 17% of the identified patients attended recommended clinical care according to national guidelines. Including undiagnosed patients, the current population...

  18. CISG Denmark (www.cisg.dk)

    DEFF Research Database (Denmark)

    CISG Denmark is the danish CISG website, attached to the Pace University, School of Law CISG Database.......CISG Denmark is the danish CISG website, attached to the Pace University, School of Law CISG Database....

  19. Zone Denmark - gasell Taanist / Reet Krause

    Index Scriptorium Estoniae

    Krause, Reet, 1967-

    2006-01-01

    Taanis Viborgis asuva firma Zone Company Denmark, kaubamärgi Zone Denmark ja firma disainerite tutvustus. Ettevõte valmistab disainitooteid roostevabast terasest, klaasist, puidust, kummist jm. Disainer Naja Utzon Popov endast, oma loomingust

  20. Oxic limestone drains for treatment of dilute, acidic mine drainage

    Science.gov (United States)

    Cravotta, Charles A.

    1998-01-01

    Limestone treatment systems can be effective for remediation of acidic mine drainage (AMD) that contains moderate concentrations of dissolved O2 , Fe3+ , or A13+ (1‐5 mg‐L‐1 ). Samples of water and limestone were collected periodically for 1 year at inflow, outflow, and intermediate points within underground, oxic limestone drains (OLDs) in Pennsylvania to evaluate the transport of dissolved metals and the effect of pH and Fe‐ and Al‐hydrolysis products on the rate of limestone dissolution. The influent was acidic and relatively dilute (pH 1 mg‐L‐1 ) but was near neutral (pH = 6.2‐7.0); Fe and Al decreased to less than 5% of influent concentrations. As pH increased near the inflow, hydrous Fe and Al oxides precipitated in the OLDs. The hydrous oxides, nominally Fe(OH)3 and AI(OH)3, were visible as loosely bound, orange‐yellow coatings on limestone near the inflow. As time elapsed, Fe(OH)3 and AI(OH)3 particles were transported downflow. During the first 6 months of the experiment, Mn 2+ was transported conservatively through the OLDs; however, during the second 6 months, concentrations of Mn in effluent decreased by about 50% relative to influent. The accumulation of hydrous oxides and elevated pH (>5) in the downflow part of the OLDs promoted sorption and coprecipitation of Mn as indicated by its enrichment relative to Fe in hydrous‐oxide particles and coatings on limestone. Despite thick (~1 mm) hydrous‐oxide coatings on limestone near the inflow, CaCO3 dissolution was more rapid near the inflow than at downflow points within the OLD where the limestone was not coated. The rate of limestone dissolution decreased with increased residence time, pH, and concentrations of Ca2+ and HCO3‐ and decreased PCO2. The following overall reaction shows alkalinity as an ultimate product of the iron hydrolysis reaction in an OLD:Fe2+ + 0.25 O2 +CaCO3 + 2.5 H2O --> Fe(OH)3 + 2 Ca2+ + 2 HCO3-where 2 moles of CaCO3 dissolve for each mole of Fe(OH)3 produced

  1. Sodium sesquicarbonate (Akang) and limestone as catalysts for the ...

    African Journals Online (AJOL)

    Production of monoglycerides from palm and palm kernel oils were carried out using sodium sesquicarbonate (akang) and lime stone as catalysts.The results showed that the maximum monoglyceride formed is in the range of 49–57% of the fatty product for the limestone catalyst and 78 – 92% for the sodium ...

  2. The Solnhofen Limestone: A stony heritage of many uses

    Science.gov (United States)

    Kölbl-Ebert, Martina; Kramar, Sabina; Cooper, Barry J.

    2016-04-01

    High above the valley of the River Altmühl (Bavaria, Germany), between Solnhofen to the west and Kelheim to the east, numerous quarries give access to thinly plated limestone from the Upper Jurassic, some 150 million years before the present. The main quarry areas lie around the town of Eichstätt and between the villages of Solnhofen, Langenaltheim and Mörnsheim. Here limestone slabs have been quarried for several hundred years, some even in Roman times. Solnhofen Limestone is famous worldwide; not only because it is a beautiful building stone of high quality, but also because of the exceptionally well-preserved fossils it contains -among them the early bird Archaeopteryx. The quarry industry between Solnhofen and Eichstätt has shaped a cultural landscape, with old and new quarries sunk into the plain and numerous spoil heaps rising above it, for the rock is not all economically useful. But many of the spoil heaps and the old quarries are environmentally protected as they provide a habitat for some rare plants and animals. It is not necessary to cut the Solnhofen Limestone with a saw: it is split by hand into thin and even slabs or sheets which are used for flagstones and wall covers, which since centuries are sold world-wide. Locally it also serves as roof tiles for traditional houses. Thick slabs of especially fine quality may be found near Solnhofen and Mörnsheim and are used for lithography printing.

  3. Effect of Limestone Powder on Microstructure of Ternary Cementitious System

    NARCIS (Netherlands)

    Zhang, Y.; Ye, G.

    2012-01-01

    The pressure to reach sustainability favours the development of ternary composite cement. The synergistic effect on mechanical behaviour at 28 days between limestone powder (LP) and pozzolanic additives, i.e. fly ash (FA) and blast furnace slag (BFS), has been documented. In order to better

  4. Kinetic Study of Calcination of Jakura Limestone Using Power Rate ...

    African Journals Online (AJOL)

    The calcination of Jakura limestone was also found to be first order reaction with respect to CaCO3 concentration having average regression coefficient of 0.99. The temperature dependent terms were found using Arrhenius law and it was observed that the reaction temperature has a direct effect on the rate of reaction.

  5. Limestone rocks analysis by X-ray fluorescence analysis

    International Nuclear Information System (INIS)

    Izquierdo M, G.; Ponce R, R.; Vazquez J, J.

    1996-01-01

    By request of a private company, employing basically X-ray fluorescence analysis (X RF), was established a fast and accurate method for the analysis of the major elements in limestone rocks. Additionally, for complementing analysis was determined by ion chromatography, the chlorides appearance and by atomic absorption of sodium. By gravimetry, was determined the losses by ignition and the alpha quartz. (Author)

  6. Hydrate Phase Assemblages in Calcium Sulfoaluminate - Metakaolin - Limestone Blends

    DEFF Research Database (Denmark)

    Pedersen, Malene Thostrup; Lothenbach, Barbara; Winnefeld, Frank

    2017-01-01

    The combination of a commercial calcium sulfoaluminate (CSA) cement with metakaolin (MK) and limestone (LS) as supplementary cementitious materials (SCMs) is investigated for a CSA replacement level of 20 wt%. In addition to a pure CSA cement, paste samples have been prepared for three blends wit...

  7. Flora of Chihuahuan desertscrub on limestone in northeastern Sonora, Mexico

    Science.gov (United States)

    Thomas R. Van Devender; Ana Lilia Reina-Guerrero; J. Jesus. Sanchez-Escalante

    2013-01-01

    Transects were done in desertscrub on limestone to characterize the flora of the westernmost Chihuahuan Desert. Most of the sites (15) were in the Municipios of Agua Prieta and Naco in northeastern Sonora, with single sites near Ascensión, northwestern Chihuahua and east of Douglas in southeastern Arizona. A total of 236 taxa were recorded on transects. Dicot perennial...

  8. Innovative Field Investigations in Limestone using a FACT-FLUTe

    DEFF Research Database (Denmark)

    Mosthaf, Klaus; Barrett Sørensen, Mie; Broholm, Mette Martina

    2015-01-01

    and the prevailing aqueous pore water concentrations for a range of hydraulic parameters and conditions typical for limestone aquifers. Results and outlook The sorption experiments showed very strong sorption with reasonably linear sorption isotherms over a very large concentration range for individual chlorinated...

  9. Open Educational Resources in Denmark

    DEFF Research Database (Denmark)

    Harlung, Asger

    2010-01-01

    The report presents an overview of accessibility, content types,and educational levels of open Educational Resources for public school, high shcool, higher education, and citizen empowerment and enlightenment offered from educational institutions or via other internet sources in Denmark in late...

  10. Practice and Problems in Denmark

    DEFF Research Database (Denmark)

    Larsen, Torben

    our practice gradually has arisen. With basis in the University of Aalborg, Denmark, the author has been involved in research and design of sea outfalls since the beginning of the seventies. It is controversial to give examples of dis-functioning sea outfalls by name and it has therefore been avoided...

  11. RIO Country Report Denmark 2014

    DEFF Research Database (Denmark)

    Grimpe, Christoph

    The report offers an analysis of the R&I system in Denmark for 2014, including relevant policies and funding, with particular focus on topics critical for two EU policies: the European Research Area and the Innovation Union. The report was prepared according to a set of guidelines for collecting ...

  12. Denmark: consensus seeking and decentralization

    DEFF Research Database (Denmark)

    Andersen, Mikael Skou; Christiansen, Peter Munk; Winter, Søren

    1998-01-01

    Governance and Environment in Western Europe: Politics, Policy and Administration, provides an up-to-date overview of developments in this area focusing on a selection of ten countries in Western Europe and the European Union. The countries examined are: Denmark, France, Germany, Greece, Italy...

  13. Denmark in the Bologna Process

    DEFF Research Database (Denmark)

    Lauridsen, Karen M.

    The creation of the European Higher Education Area foreseen in the Bologna Declaration (1999) will facilitate inter-university co-operation by promoting the mobility and employability of European citizens. The article outlines the current development in Denmark, especially as regards the training...

  14. 0-6686 : improving DMS 9210 requirements for limestone rock asphalt : [project summary].

    Science.gov (United States)

    2013-08-01

    Limestone rock asphalt (LRA) mixtures have : been produced and placed for several decades : using specification requirements currently listed : under DMS 9210, Limestone Rock Asphalt (LRA). : Several Texas Department of Transportation : (TxDOT) distr...

  15. Assessment of Environmental Impacts of Limestone Quarrying Operations in Thailand

    Directory of Open Access Journals (Sweden)

    Kittipongvises Suthirat

    2017-11-01

    Full Text Available Environmental impacts of the mineral extraction have been a public concern. Presently, there is widespread global interest in the area of mining and its sustainability that focused on the need to shift mining industry to a more sustainable framework. The aim of this study was to systematically assess all possible environmental and climate change related impacts of the limestone quarrying operation in Thailand. By considering the life cycle assessment method, the production processes were divided into three phases: raw material extraction, transportation, and comminution. Both IMPACT 2002+ and the Greenhouse Gas Protocol methods were used. Results of IMPACT 2002+ analysis showed that per 1 ton crushed limestone rock production, the total depletion of resource and GHGs emissions were 79.6 MJ and 2.76 kg CO2 eq., respectively. Regarding to the four damage categories, ‘resources’ and ‘climate change’ categories were the two greatest environmental impacts of the limestone rock production. Diesel fuel and electricity consumption in the mining processes were the main causes of those impacts. For climate change, the unit of CO2 eq. was expressed to quantify the total GHGs emissions. Estimated result was about 3.13 kg CO2 eq. per ton limestone rock product. The results obtained by the Greenhouse Gas Protocol were also similar to IMPACT 2002+ method. Electrical energy consumption was considered as the main driver of GHGs, accounting for approximately 46.8 % of total fossil fuel CO2 emissions. A final point should be noted that data uncertainties in environmental assessment over the complete life cycle of limestone quarrying operation have to be carefully considered.

  16. Assessment of Environmental Impacts of Limestone Quarrying Operations in Thailand

    Science.gov (United States)

    Kittipongvises, Suthirat

    2017-11-01

    Environmental impacts of the mineral extraction have been a public concern. Presently, there is widespread global interest in the area of mining and its sustainability that focused on the need to shift mining industry to a more sustainable framework. The aim of this study was to systematically assess all possible environmental and climate change related impacts of the limestone quarrying operation in Thailand. By considering the life cycle assessment method, the production processes were divided into three phases: raw material extraction, transportation, and comminution. Both IMPACT 2002+ and the Greenhouse Gas Protocol methods were used. Results of IMPACT 2002+ analysis showed that per 1 ton crushed limestone rock production, the total depletion of resource and GHGs emissions were 79.6 MJ and 2.76 kg CO2 eq., respectively. Regarding to the four damage categories, `resources' and `climate change' categories were the two greatest environmental impacts of the limestone rock production. Diesel fuel and electricity consumption in the mining processes were the main causes of those impacts. For climate change, the unit of CO2 eq. was expressed to quantify the total GHGs emissions. Estimated result was about 3.13 kg CO2 eq. per ton limestone rock product. The results obtained by the Greenhouse Gas Protocol were also similar to IMPACT 2002+ method. Electrical energy consumption was considered as the main driver of GHGs, accounting for approximately 46.8 % of total fossil fuel CO2 emissions. A final point should be noted that data uncertainties in environmental assessment over the complete life cycle of limestone quarrying operation have to be carefully considered.

  17. Additional Gigantoproductus species from the upper Visean-Namurian limestone of Kotaki, central Japan

    OpenAIRE

    Ibaraki, Yousuke; Tazawa, Jun-ichi; Nakamura, Yukio

    2010-01-01

    A large productid brachiopod species, Gigantoproductus aurita (Bolkhovitinova, 1938), is described from the Tsuchikurazawa Limestone (upper Visean-Namurian), a large limestone block within a Permian accretionary complex of Kotaki, Itoigawa City, Niigata Prefecture, central Japan. This is the fourth described Gigantoproductus species from the Tsuchikurazawa Limestone. The range of G. aurita may extend to late Visean on the basis of the previous fossil records of the limestone.

  18. Characterization of limestone reacted with acid-mine drainage in a pulsed limestone bed treatment system at the Friendship Hill National Historical Site, Pennsylvania, USA

    Science.gov (United States)

    Hammarstrom, J.M.; Sibrell, P.L.; Belkin, H.E.

    2003-01-01

    Armoring of limestone is a common cause of failure in limestone-based acid-mine drainage (AMD) treatment systems. Limestone is the least expensive material available for acid neutralization, but is not typically recommended for highly acidic, Fe-rich waters due to armoring with Fe(III) oxyhydroxide coatings. A new AMD treatment technology that uses CO2 in a pulsed limestone bed reactor minimizes armor formation and enhances limestone reaction with AMD. Limestone was characterized before and after treatment with constant flow and with the new pulsed limestone bed process using AMD from an inactive coal mine in Pennsylvania (pH = 2.9, Fe = 150 mg/l, acidity = 1000 mg/l CaCO3). In constant flow experiments, limestone is completely armored with reddish-colored ochre within 48 h of contact in a fluidized bed reactor. Effluent pH initially increased from the inflow pH of 2.9 to over 7, but then decreased to 6 during operation. Limestone removed from a pulsed bed pilot plant is a mixture of unarmored, rounded and etched limestone grains and partially armored limestone and refractory mineral grains (dolomite, pyrite). The ???30% of the residual grains in the pulsed flow reactor that are armored have thicker (50- to 100-??m), more aluminous coatings and lack the gypsum rind that develops in the constant flow experiment. Aluminium-rich zones developed in the interior parts of armor rims in both the constant flow and pulsed limestone bed experiments in response to pH changes at the solid/solution interface. ?? 2003 Elsevier Ltd. All rights reserved.

  19. Power and democracy in Denmark

    DEFF Research Database (Denmark)

    Andersen, Jørgen Goul; Jørgensen, Torben Beck; Valgårda, Signild

    In 1997, the Danish Parliament decided to launch a power study, officially An Analysis of Democracy and Power in Denmark. A steering committee consisting of five independent researchers was assigned responsibility for the project. The Steering Committee has gathered the overall conclusions from...... the numerous projects under the Power Study, and this book is a short presentation of these conclusions.The main focus of the book is the state of democracy in Denmark at the dawn of the 21st century. How has democracy fared, has the development made things better or worse, and to which extent does......, and the political institutions show considerable democratic robustness. However, not everything has gone or is going well. There are still pronounced social divisions in Danish society, although their nature has changed somewhat. The ideal of an informed public debate does not always enjoy the best conditions...

  20. Power and democracy in Denmark

    DEFF Research Database (Denmark)

    Andersen, Jørgen Goul; Jørgensen, Torben Beck; Valgårda, Signild

    the numerous projects under the Power Study, and this book is a short presentation of these conclusions.The main focus of the book is the state of democracy in Denmark at the dawn of the 21st century. How has democracy fared, has the development made things better or worse, and to which extent does......In 1997, the Danish Parliament decided to launch a power study, officially An Analysis of Democracy and Power in Denmark. A steering committee consisting of five independent researchers was assigned responsibility for the project. The Steering Committee has gathered the overall conclusions from...... contemporary democracy live up to our democratic ideals? The answer is that in many ways democracy is doing better than we might have expected, considering the intense pressure on the nation state and the democratic institutions in the postwar period. The Danish population is still full of democratic life...

  1. The Risoe National Laboratory, Denmark

    International Nuclear Information System (INIS)

    Majborn, B.

    2001-01-01

    The Risoe National Laboratory of Denmark started as a nuclear research centre, under the Atomic Energy Commission in 1955, with research reactors, an accelerator and related facilities. The research component, aimed at the introduction of nuclear power plants in Denmark, was wound up in 1985 with the country deciding to forego nuclear power in its energy planning. From 1993 the centre is under the jurisdiction of the Ministry of Research with three main areas of work: i) research on high international level; ii) train researchers; and iii) provide service to industry. The centre is funded up to 53% by the Danish Government and 47% by contract earnings. Some areas of current research include: i) materials science; ii) optics and sensor systems; iii) plant production and ecology; and iv) systems analysis. The nuclear component of the research centre is related to the operation of the nuclear facilities and for maintaining national expertise in nuclear safety and radiation protection. (author)

  2. Invasive alien birds in Denmark

    DEFF Research Database (Denmark)

    Fox, Anthony David; Heldbjerg, Henning; Nyegaard, Timme

    2015-01-01

    Avian Introduced Alien Species (IAS) constitute a threat to the integrity of native biodiversity, the economy and human health, so here we briefly review some of the problems posed by such species around the world in relation to such bird species in Denmark. A new European Union Regulation...... on Invasive Alien Species implemented in January 2015 establishes a framework for actions to combat alien species, which requires Member States to prevent the spread of alien species, provide early warning and rapid responses to their presence and management of established alien species where they occur. We...... show the importance of mechanisms such as DOF’s (Dansk Ornitologisk Forening, BirdLife Denmark) Atlas project, Common Bird Census (breeding and wintering species) and DOFbasen to contribute data on the current geographical and numerical distribution of the few serious alien avian species already...

  3. Invasive alien birds in Denmark

    DEFF Research Database (Denmark)

    Nyegaard, Timme; Heldbjerg, Henning; Fox, Anthony David

    Avian Introduced Alien Species (IAS) constitute a threat to the integrity of native biodiversity, the economy and human health, so here we briefly review some of the problems posed by such species around the world in relation to bird species in Denmark. A new European Union Regulation on Invasive...... Alien Species implemented in January 2015 requires a framework for actions to combat alien species, which requires Member States to prevent the spread of alien species, provide early warning and rapid responses to their presence and management of established alien species where they occur. We show...... the importance of mechanisms such as DOFs (Danish Ornithological Society, BirdLife Denmark) Atlas project, Common Bird Monitoring (breeding and wintering species) and DOFbasen to contribute data on the current geographical and numerical distribution of the few serious alien avian species already present...

  4. Performance of portland limestone cements: Cements designed to be more sustainable that include up to 15% limestone addition

    Science.gov (United States)

    Barrett, Timothy J.

    In 2009, ASTM and AASHTO permitted the use of up to 5% interground limestone in ordinary portland cement (OPC) as a part of a change to ASTM C150/AASHTO M85. When this work was initiated a new proposal was being discussed that would enable up to 15% interground limestone cement to be considered in ASTM C595/AASHTO M234. This work served to provide rapid feedback to the state department of transportation and concrete industry for use in discussions regarding these specifications. Since the time this work was initiated, ASTM C595/AASHTO M234 was passed (2012c) and PLCs are now able to be specified, however they are still not widely used. The proposal for increasing the volume of limestone that would be permitted to be interground in cement is designed to enable more sustainable construction, which may significantly reduce the CO2 that is embodied in the built infrastructure while also extending the life of cement quarries. Research regarding the performance of cements with interground limestone has been conducted by the cement industry since these cements became widely used in Europe over three decades ago, however this work focuses on North American Portland Limestone Cements (PLCs) which are specifically designed to achieve similar performance as the OPCs they replace.This thesis presents a two-phase study in which the potential for application of cements containing limestone was assessed. The first phase of this study utilized a fundamental approach to determine whether cement with up to 15% of interground or blended limestone can be used as a direct substitute to ordinary portland cement. The second phase of the study assessed the concern of early age shrinkage and cracking potential when using PLCs, as these cements are typically ground finer than their OPC counterparts. For the first phase of the study, three commercially produced PLCs were obtained and compared to three commercially produced OPCs made from the same clinker. An additional cement was tested

  5. Experiences with biomass in Denmark

    DEFF Research Database (Denmark)

    Gregg, Jay Sterling; Bolwig, Simon; Solér, Ola

    The Bioenergy Department in SENER have requested assistance with planning for the deployment of bioenergy (Biomass, biogas and waste incineration) in Mexico and information on Danish experiences with developing policy initiatives promoting bioenergy. This introduction to the Danish experiences...... with biomass use is compiled as preparation for SENER’s potential visit to Denmark in 2014. This report was prepared 19 June, 2014 by DTU System Analysis to Danish Energy Agency (DEA) as part of a frame contract agreement....

  6. Released from Prison in Denmark

    DEFF Research Database (Denmark)

    Olesen, Annette; Storgaard, Anette

    2016-01-01

    In 2010 a cross-sectorial reentry framework was launched as the ‘Schedule of the Good Release’. The ambition was to implement the actions outlined in the Schedule to all prisons and municipalities in Denmark to strengthen the cross-sectorial collaboration concerning parole and to support the paro......In 2010 a cross-sectorial reentry framework was launched as the ‘Schedule of the Good Release’. The ambition was to implement the actions outlined in the Schedule to all prisons and municipalities in Denmark to strengthen the cross-sectorial collaboration concerning parole and to support...... the parolees. The primary purpose of the Schedule was to prevent crime and secure parolees’ rights to social security and support. This chapter focuses on parolees in Denmark; their experiences of transitioning from prison back into society and life after prison; and whether the Danish state’s reentry...... ambitions can be mirrored in the parolees’ first-hand experiences. Our findings suggest that parolees experienced their reentry as chaotic; that their supervision lacked vision; and ‘informal’ punishment was severe and permeated their lives post-prison....

  7. Are the Vinjamur rocks carbonatites or meta-limestones?

    Energy Technology Data Exchange (ETDEWEB)

    Subbarao, K V; Bhaskar Rao, B [Indian Institute of Technology, Bombay (India). Dept. of Earth Sciences; Le Bas, M J [Univ. of Leicester, Leicester (United Kingdom). Dept. of Geology

    1995-08-01

    New whole-rock rare earth element (REE) data for the metacarbonate rocks inter bedded with schists at Vinjamur in the Nellore schist belt of Andhra Pradesh, show low total REE contents ({sigma}9-128 ppm) that are inconsistent with an igneous carbonatitic origin but which correspond more closely with a sedimentary limestone origin. The REE data of these rocks however, do not give absolute discrimination between marbles of meta-limestone and metacarbonatite origin. Micro-probe analytical data give better discrimination, and the chemical compositions of the calcite, micas, amphibole, plagioclase, apatite, monazite and staurolite in the Vinjamur marbles give strong and consistent evidence of a metamorphosed sedimentary rather than an igneous origin. (author). 35 refs., 7 figs., 9 tabs.

  8. The influence of combustion derived pollutants on limestone deterioration

    DEFF Research Database (Denmark)

    Johnson, JB; Montgomery, Melanie; Thompson, GE

    1996-01-01

    This study concerns quantification of the relative chemical degradation effects of dry deposition of combustion-derived atmospheric pollutants, HCl, SO2 and NO2, on Portland and Monks Park limestones, employing laboratory exposure chambers for periods of 30 days. Using presentation rates up to 40 x...... 10(-4) mu g cm(-2) s(-1), the pollutants were assessed individually and in various combinations, along with ozone as oxidant, at 84% RH with dry or water-wetted surfaces. The degradation was followed by analysis of exposed stone, for Cl-, SO42- and NO3-, and of run-off solution for Ca2+, in addition...... to the anions. From these data, the total calcium released from limestone to reaction ions and products and the percentages of each pollutant reacted (and so the deposition velocity (V-D)) in each exposure regime were calculated. HCl acted independently of the presence of other pollutants, showed 40 and 100...

  9. Induration and Biot’s Coefficient of Palaeogene Limestone

    DEFF Research Database (Denmark)

    Andreassen, Katrine Alling

    2017-01-01

    In engineering geology and classification of rock masses for civil engineering purposes, the degree of induration for a rock serves as a useful classification parameter. Induration is a measure of how well the grains of a sedimentary rock are cemented together - from loosely cemented/soft rock...... to very competent/slightly metamorphic rock. The Biot coefficient links to the degree of cementation in the capacity of how it relates the elastic deformations with the change in pore pressure. A hypothesis is that the degree of induration could be correlated to the magnitude of the Biot coefficient....... This is tested on 11 Copenhagen Limestone specimens of varying porosity and densities obtained from one borehole with a limestone interval of 30 m. Their induration varies from H2 to H5. Elastic wave propagation measurements are used to establish the Biot coefficient and determination of the mineralogy for H5...

  10. Are the Vinjamur rocks carbonatites or meta-limestones?

    International Nuclear Information System (INIS)

    Subbarao, K.V.; Bhaskar Rao, B.; Le Bas, M.J.

    1995-01-01

    New whole-rock rare earth element (REE) data for the metacarbonate rocks inter bedded with schists at Vinjamur in the Nellore schist belt of Andhra Pradesh, show low total REE contents (σ9-128 ppm) that are inconsistent with an igneous carbonatitic origin but which correspond more closely with a sedimentary limestone origin. The REE data of these rocks however, do not give absolute discrimination between marbles of meta-limestone and metacarbonatite origin. Micro-probe analytical data give better discrimination, and the chemical compositions of the calcite, micas, amphibole, plagioclase, apatite, monazite and staurolite in the Vinjamur marbles give strong and consistent evidence of a metamorphosed sedimentary rather than an igneous origin. (author). 35 refs., 7 figs., 9 tabs

  11. OPTIMALIZATION OF BLASTING IN »LAKOVIĆI« LIMESTONE QUARRY

    OpenAIRE

    Branko Božić; Karlo Braun

    1992-01-01

    The optimalization of exploitation in »Lakovići« limestone quarry is described. Based on determined discontinuities in the rock mass and their densities, the best possible working site have been located in order to obtain the best possible sizes of blasted rocks and work slope stability. Optimal lowest resistance line size for the quarry has been counted and proved experimentally. New blasting parameters have resulted in considerable saving of drilling and explosive (the paper is published in...

  12. Degradation behavior of limestone concrete under limited time sodium exposure

    International Nuclear Information System (INIS)

    Das, S.K.; Sharma, A.K.; Ramesh, S.S.; Parida, F.C.; Kasinathan, N.; Chellapandi, P.

    2009-01-01

    Adequate safety measures are taken during design, fabrication, construction and operation of liquid sodium cooled fast breeder reactor (FBR). However, possibility of sodium leak from secondary heat transport circuits of FBR has not been completely ruled out. In the areas housing sodium pipelines such as Steam Generator Building (SGB), spilled liquid sodium not only reacts with air causing fire but also interacts with structural concrete resulting in its degradation. The structural concrete can be protected from sodium attack using sodium resistant sacrificial concrete layer or steel/refractory liners. Moreover, design and construction of sloping floor with sodium collection pit helps in minimizing the mass of sodium accumulated on the floor and exposure period. Sacrificial concrete layer on the structural concrete should meet key factors like economy, castability, easy removal of affected concrete in the event of a sodium fire and disposability of debris apart from its good resistance against hot burning sodium. Present study is directed towards testing of limestone concrete blocks (made out of 13% ordinary portland cement, 8% water, 48% coarse limestone and 31 % fine limestone aggregates)

  13. Adsorption of anionic surfactants in limestone medium during oil recovery

    Energy Technology Data Exchange (ETDEWEB)

    Canbolat, Serhat; Bagci, Suat [Middle East Technical Univ., Dept. of Petroleum and Natural Gas Engineering, Ankara (Turkey)

    2004-07-15

    Foam-forming surfactant performance was evaluated by several experimental methods (interfacial tension, foam stability, corefloods) using commercial surfactants. There is considerable interest in the use of foam-forming surfactants for mobility control in water flood. To provide effective mobility control, the injected surfactant must propagate from the injection well toward the production well. One of the important parameters affecting propagation of foam-forming surfactant through the reservoir is the retention of surfactant due to its adsorption on reservoir rock. The determination of the adsorption of foam-forming surfactants in limestone reservoirs is important for the residual oil recovery efficiency. Adsorption measurements, recovery efficiencies, and surfactant and alkaline flooding experiments carried out with the representative of the selected surfactants alkaline solutions, linear alkyl benzene sulphonic acid (LABSA), sodium lauryl ether sulfate (SLES), and NaOH in a limestone medium. These surfactants were selected with respect to their foaming ability. Calibration curves formed by pH measurements were used to determine the correct adsorption amount of the used surfactants and recovery efficiency of these surfactants compared with base waterflooding. The results showed that LABSA adsorbed more than SLES in limestone reservoirs. The recovery efficiency of SLES was higher than the recovery efficiency of LABSA, and they decreased the recovery efficiency with respect to only the water injection case. (Author)

  14. Development of gypsum alteration on marble and limestone

    Science.gov (United States)

    McGee, E.S.

    1996-01-01

    Blackened alteration crusts of gypsum plus particulates that form on sheltered areas on marble and limestone buildings pose a challenge for rehabilitation and cleaning. Fresh marble and limestone samples exposed at monitored exposure sites present conditions of simple geometry and well-documented exposures but have short exposure histories (one to five years). The gypsum alteration crusts that develop on these samples provide insight into the early stages and rate of alteration crust formation. Alteration crusts from buildings give a longer, but less well known exposure history and present much more complex surfaces for gypsum accumulation. Integrated observations and measurements of alteration crusts from exposure samples and from buildings identify four factors that are important in the formation and development of alteration crusts on marble and limestone: (1) pollution levels, (2) exposure to rain or washing, (3) geometry of exposure of the stone surface, and (4) permeability of the stone. The combination of these factors contributes to both the distribution and the physical characteristics of the gypsum crusts which may affect cleaning decisions.

  15. Biogenic magnetite as a primary remanence carrier in limestone deposits

    Science.gov (United States)

    Chang, Shih-Bin R.; Kirschvink, Joseph L.; Stolz, John F.

    1987-06-01

    Studies on the microbial communities and magnetic phases of samples collected from carbonate oozes at Sugarloaf Key, FL, U.S.A. and calcareous laminated sediments from Laguna Figueroa, Baja California, Mexico have revealed the existence of magnetotactic bacteria and ultrafine-grained single domain magnetite in both environments. Magnetotactic bacteria were identified by light and electron microscopy. The single domain magnetite was detected by coercivity spectra analysis with a SQUID magnetometer and examined under the transmission electron microscope. The similarity, in terms of size and shape, between the single domain magnetite found in these sediments and the magnetite observed in the bacterial magnetosome from enriched cultures indicates the ultrafine-grained magnetite in these two marine environments was biologically formed. These results, combined with the common occurrences of ultrafine-grained magnetite in limestone deposits detected rock magnetically, suggest biogenic magnetite may be present and contribute to the magnetic remanence in these rocks. Several Cambrian limestone samples, separately collected from Siberia, China, and Kazakhstan, were examined for the presence of bacterial magnetite. Samples from the Lower Cambrian Sinskian Formation at Siberia Platform were found to contain both a large amount of apparently bacterial magnetite particles and a very stable primary magnetic component. Post-Cambrian diagenesis does not seem to affect the microgranulometry of these apparently bacterial magnetite crystals or the magnetic remanence carried by them. Assessing the potential role of biogenic magnetite as a primary remanence carrier in other Phanerozoic limestone deposits ought to be further pursued.

  16. The Biot coefficient for a low permeability heterogeneous limestone

    Science.gov (United States)

    Selvadurai, A. P. S.

    2018-04-01

    This paper presents the experimental and theoretical developments used to estimate the Biot coefficient for the heterogeneous Cobourg Limestone, which is characterized by its very low permeability. The coefficient forms an important component of the Biot poroelastic model that is used to examine coupled hydro-mechanical and thermo-hydro-mechanical processes in the fluid-saturated Cobourg Limestone. The constraints imposed by both the heterogeneous fabric and its extremely low intact permeability [K \\in (10^{-23},10^{-20}) m2 ] require the development of alternative approaches to estimate the Biot coefficient. Large specimen bench-scale triaxial tests (150 mm diameter and 300 mm long) that account for the scale of the heterogeneous fabric are complemented by results for the volume fraction-based mineralogical composition derived from XRD measurements. The compressibility of the solid phase is based on theoretical developments proposed in the mechanics of multi-phasic elastic materials. An appeal to the theory of multi-phasic elastic solids is the only feasible approach for examining the compressibility of the solid phase. The presence of a number of mineral species necessitates the use of the theories of Voigt, Reuss and Hill along with the theories proposed by Hashin and Shtrikman for developing bounds for the compressibility of the multi-phasic geologic material composing the skeletal fabric. The analytical estimates for the Biot coefficient for the Cobourg Limestone are compared with results for similar low permeability rocks reported in the literature.

  17. Renewable Energy Policy Fact sheet - Denmark

    International Nuclear Information System (INIS)

    2017-09-01

    The EurObserv'ER policy profiles give a snapshot of the renewable energy policy in the EU Member States. Denmark surpassed its 2020 nationally binding renewable energy in 2015. In March 2012 a new Energy Agreement was reached in Denmark. The Agreement contains a wide range of ambitious initiatives, which aims at bringing Denmark closer to the target of 100% renewable energy in the energy and transport sectors by 2050. Main support measures to promote renewable energy in Denmark consist of a feed-in premium scheme (combined with tenders for offshore wind), a quota system, tax regulation mechanisms and subsidy schemes

  18. eHealth in Denmark

    DEFF Research Database (Denmark)

    Kierkegaard, Patrick

    2013-01-01

    Denmark is widely regarded as a leading country in terms of eHealth integration and healthcare delivery services. The push for eHealth adoption over that past 20 years in the Danish health sector has led to the deployment of multiple eHealth technologies. However, in reality the Danish healthcare...... suffers from eHealth system fragmentation which has led to eHealth's inability to reach full potential in delivering quality healthcare service. This paper will presents a case study of the current state of eHealth in the Danish healthcare system and discuss the current challenges the country is facing...

  19. Accessing social rights in Denmark

    DEFF Research Database (Denmark)

    Jacqueson, Catherine

    2015-01-01

    are in decreasing order Polish, German and British nationals. Debates among politicians reflected in the media have since the enlargement of the EU to 10 new Member States in 2004 focused on and off on the issue of access by migrants to social benefits and the issue of social tourism. The debate and discussions...... 2014. The reason for that is the government’s change of practice in administrating family benefits, granting them to all Union citizens lawfully residing in Denmark without any requirement of prior residence in the country. This change was the result of a request from the European Commission...

  20. Day-Care in Denmark

    DEFF Research Database (Denmark)

    Bundgaard, Helle

    2011-01-01

    interacting with ethnic minority children and their parents, however, staff are occasionally forced to make explicit the reasoning behind their actions. A focus on the interaction of ethnic minority children and their parents in day-care centres therefore provides insights into the cultural beliefs and values......  The chapter explores central notions of appropriate social behavior in what is arguably the most important institution in Denmark when it comes to social integration, namely day-care, also known as pre-school. Moral values guiding everyday practices are generally taken for granted. When...

  1. Denmark between liberalism and nationalism

    DEFF Research Database (Denmark)

    Olsen, Tore Vincents; Mouritsen, Per

    2013-01-01

    What explains the restrictive turn towards immigrants in European countries like Denmark? Are countries returning to nationalism, or are they following a general European trend towards a perfectionist, even ‘repressive’ liberalism that seeks to create ‘liberal people’ out of immigrants? Recent...... developments in Danish policies of integration and citizenship, education and anti-discrimination suggest a combination of these two diagnoses. The current Danish ‘integration philosophy’ leaves behind a previous concern with private choice and equal rights and opportunities to emphasize other historical...

  2. Studying landscape architecture in Denmark

    DEFF Research Database (Denmark)

    Braae, Ellen Marie; Hare, Richard Andrew

    2010-01-01

    s demanded large numbers of landscape architects. Today landscape architecture education addresses current challenges of climate change and the need for sustainable development where an understanding of natural systems is seen as essential for future urbanisation processes in evermore innovative......Landscape architecture is a well-established profession in Denmark. From the early 20th Century the profession developed steadily. However, it was 1960 before a separate education was established. This proved timely as the immense physical development of the Danish welfare state of the 1970s and 80...

  3. Becoming adult educators in Denmark

    DEFF Research Database (Denmark)

    Milana, Marcella; Søgaard Lund, Lise

    2009-01-01

    In this paper we present an analysis of identity-construction processes among adult educators in Denmark and we address the question how adult educators develop professionalism, not least by taking advantage of existing opportunity structures for current and prospective adult educators. A between......-cases analysis of fifteen narrative interviews explores the professional pathways towards adult education, the perceived images of a (professional) adult educator, processes of identification with concrete or imaginary communities, and motivation for adult educator to enrol in current opportunity structures...

  4. HOMED-Homicides Eastern Denmark

    DEFF Research Database (Denmark)

    Colville-Ebeling, Bonnie; Frisch, Morten; Lynnerup, Niels

    2014-01-01

    Background:An introduction to a forensic medical homicide database established at the Department of Forensic Medicine in Copenhagen. Content: The database contains substantial clinical and demographic data obtained in conjunction with medico-legal autopsies of victims and forensic clinical...... examinations of perpetrators in homicide cases in eastern Denmark. Validity and coverage: The database contains information on all homicide cases investigated at the Department of Forensic Medicine in Copenhagen since 1971. Coverage for the catchment area of the department is assumed to be very good because...

  5. Denmark

    DEFF Research Database (Denmark)

    Lauritzen, Bent

    2017-01-01

    The media environment continues to be characterized by strong public service broadcasters (DR and TV2) and a strong national press, but the already entrenched debate about the role of public service media online is intensifying ahead of a new remit in 2018...

  6. Denmark

    DEFF Research Database (Denmark)

    Lemming, Jørgen Kjærgaard; Øster, Flemming; Thomassen, H.

    2008-01-01

    The European Tort Law Yearbook provides a comprehensive overview of the latest developments in tort law in Europe. It contains reports on most EU Member States, including the new Member States the Czech Republic, Estonia, Hungary, Latvia, Lithunia, Poland, Slovakia, Slovenia, Bulgaria and Romania....

  7. Denmark

    DEFF Research Database (Denmark)

    Jacobsen, H.; Larsen, Hans Hvidtfeldt; Morthorst, P.E.

    2006-01-01

    This project has investigated outward foreign direct investments from the Nordic economies, and analysed the role domestic multinational companies play in their respective Nordic home economies. The project consisted of a desktop study of existing research, a quantitative study of FDI flows and t...

  8. Denmark

    DEFF Research Database (Denmark)

    Storgaard, Anette

    2013-01-01

    Despite a change of government in September 2011, Danish politics have been largely characterised by continuity since the beginning of the economic crisis in 2008, although with an increased emphasis on reforming the welfare state in order to increase growth and create new jobs. A pragmatist turn...

  9. Denmark

    DEFF Research Database (Denmark)

    Pedersen, Anders Branth

    2008-01-01

    The Encyclopedia of Global Warming and Climate Change helps readers learn about the astonishingly intricate processes that make ours the only planet known to be habitable. These three volumes include more than 750 articles that explore major topics related to global warming and climate change......-ranging geographically from the North Pole to the South Pole, and thematically from social effects to scientific causes....

  10. Denmark

    DEFF Research Database (Denmark)

    Kosiara-Pedersen, Karina

    2016-01-01

    on the kinds of gendered understanding that underline research surveys like the WIME project and discusses the potential limitations of this approach to gender analysis. Furthermore, it discusses the benefits and potential problems of applying gender inclusive policies to media institutions by drawing upon....... Using this concept, this article critically discussed diversity policies and gender equality policies as they apply to media institutions....

  11. Farming of Freshwater Rainbow Trout in Denmark

    DEFF Research Database (Denmark)

    Jokumsen, Alfred; Svendsen, Lars Moeslund

    Textbook on Farming of Freshwater Rainbow Trout in Denmark. Danish edition with the title: Opdræt af regnbueørred i Danmark......Textbook on Farming of Freshwater Rainbow Trout in Denmark. Danish edition with the title: Opdræt af regnbueørred i Danmark...

  12. Oral contraception in Denmark 1998-2010

    DEFF Research Database (Denmark)

    Wilson, Nadia M; Laursen, Maja; Lidegaard, Øjvind

    2012-01-01

    Oral contraceptives (OC) are the most popular contraception in Denmark. Overall figures on use are well described, but more detailed use patterns according to type and age need to be updated.......Oral contraceptives (OC) are the most popular contraception in Denmark. Overall figures on use are well described, but more detailed use patterns according to type and age need to be updated....

  13. Socioeconomic differences in health expectancy in Denmark

    DEFF Research Database (Denmark)

    Brønnum-Hansen, Henrik

    2000-01-01

    Social differences in mortality rates reported in Denmark gave rise to the present study of health expectancy in different socioeconomic groups.......Social differences in mortality rates reported in Denmark gave rise to the present study of health expectancy in different socioeconomic groups....

  14. Denmark. Self-sufficiency and reserves management

    International Nuclear Information System (INIS)

    Erceville, H. d'.

    1997-01-01

    Since 1991, Denmark is a self-sufficient and a net petroleum and natural gas exporting country. Like all neighboring countries of the North sea, this country enjoys many advantages. However, Denmark exports and imports about a third of its hydrocarbons. This policy is a way to control its reserves for the future. (J.S.)

  15. Live and work in North Denmark

    DEFF Research Database (Denmark)

    Christensen, Sascha; Pristed Nielsen, Helene

    This report is based on a survey among Expats in North Denmark, and was carried out in collaboration with 'Velkomstcentre - live and work in North Denmark'. It includes findings about the backgrounds of the Expats, their motives for coming to the region and their perceptions of the region before...

  16. The BRICS and Denmark - Economics & High Politics

    DEFF Research Database (Denmark)

    Skak, Mette

    2013-01-01

    Denmark's otherwise strategic opening towards the BRICS (Brazil, Russia, India, China and South Africa) lacks the world order dimension of raison de système.......Denmark's otherwise strategic opening towards the BRICS (Brazil, Russia, India, China and South Africa) lacks the world order dimension of raison de système....

  17. The strange birth of liberal Denmark

    DEFF Research Database (Denmark)

    Henriksen, Ingrid; Sharpe, Paul; Lampe, Markus

    2012-01-01

    into decline, in fact flourished. Key to the success of Danish agriculture was an early diversification towards dairy production. This article challenges this simple story which sees Denmark as something of a liberal paragon. Denmark's success owed much to a prudent use of trade policy which favoured dairy...

  18. Kinetic Hydration Heat Modeling for High-Performance Concrete Containing Limestone Powder

    Directory of Open Access Journals (Sweden)

    Xiao-Yong Wang

    2017-01-01

    Full Text Available Limestone powder is increasingly used in producing high-performance concrete in the modern concrete industry. Limestone powder blended concrete has many advantages, such as increasing the early-age strength, reducing the setting time, improving the workability, and reducing the heat of hydration. This study presents a kinetic model for modeling the hydration heat of limestone blended concrete. First, an improved hydration model is proposed which considers the dilution effect and nucleation effect due to limestone powder addition. A degree of hydration is calculated using this improved hydration model. Second, hydration heat is calculated using the degree of hydration. The effects of water to binder ratio and limestone replacement ratio on hydration heat are clarified. Third, the temperature history and temperature distribution of hardening limestone blended concrete are calculated by combining hydration model with finite element method. The analysis results generally agree with experimental results of high-performance concrete with various mixing proportions.

  19. Simultaneous removal of several heavy metals from aqueous solution by natural limestones

    Directory of Open Access Journals (Sweden)

    Sdiri A.

    2014-07-01

    Full Text Available Four natural limestone samples, collected from the Campanian-Maastrichtian limestones, Tunisia, were used as adsorbents for the removal of toxic metals in aqueous systems. The results indicated that high removal efficiency could be achieved by the present natural limestones. Among the metal ions studied, Pb2+ was the most preferably removed cation because of its high affinity to calcite surface. In binary system, the presence of Cu2+ effectively depressed the sorption of Cd2+ and Zn2+. Similarly Cu2+ strongly competed with Pb2+ to limestone surface. In ternary system, the removal further decreased, but considerable amount of Pb2+ and Cu2+ still occurred regardless of the limestone sample. The same behavior was observed in quadruple system, where the selectivity sequence was Pb2+ > Cu2+ > Cd2+ > Zn2+. From these results, it was concluded that the studied limestones have the required technical specifications to be used for the removal of toxic metals from wastewaters.

  20. OPTIMALIZATION OF BLASTING IN »LAKOVIĆI« LIMESTONE QUARRY

    Directory of Open Access Journals (Sweden)

    Branko Božić

    1992-12-01

    Full Text Available The optimalization of exploitation in »Lakovići« limestone quarry is described. Based on determined discontinuities in the rock mass and their densities, the best possible working site have been located in order to obtain the best possible sizes of blasted rocks and work slope stability. Optimal lowest resistance line size for the quarry has been counted and proved experimentally. New blasting parameters have resulted in considerable saving of drilling and explosive (the paper is published in Croatian.

  1. Penetration of molten core materials into basaltic and limestone concrete

    International Nuclear Information System (INIS)

    Sutherland, H.J.

    1978-01-01

    In conjunction with the small-scale, melt-concrete interaction tests being conducted at Sandia Laboratories, an acoustic technique has been used to monitor the penetration of molten core materials into basaltic and limestone concrete. Real time plots of the position of the melt/concrete interface have been obtained, and they illustrate that the initial penetration rate of the melt may be of the order of 80 mm/min. Phenomena deduced by the technique include a non-wetted melt/concrete interface

  2. Coralgal facies of the Upper Eocene-Lower Oligocene limestones in Letca-Rastoci area

    Directory of Open Access Journals (Sweden)

    Ioana Prica

    2001-09-01

    Full Text Available In this paper are described the coralgal facies identified in the Upper Eocene-Lower Oligocene limestone succession (Cozla Formation outcropping in two quarries at Letca and Rastoci (Sălaj district, Romania. In the studied profiles the coral and algae limestones are interlayered with bioclastic limestones with foraminifera. On the top of relatively deep water deposits, coral and algae crusts and dendritic corals coated by algae were deposited. The environment registered a gradual deepening, the deposits being completely immersed, while bioclastic limestones with foraminifera were recurrently formed. This cycle is repeated, the whole succession being caracterized by several such “parasequences”.

  3. Modelling of Limestone Dissolution in Wet FGD Systems: The Importance of an Accurate Particle Size Distribution

    DEFF Research Database (Denmark)

    Kiil, Søren; Johnsson, Jan Erik; Dam-Johansen, Kim

    1999-01-01

    Danish limestone types with very different particle size distributions (PSDs). All limestones were of a high purity. Model predictions were found to be qualitatively in good agreement with experimental data without any use of adjustable parameters. Deviations between measurements and simulations were...... attributed primarily to the PSD measurements of the limestone particles, which were used as model inputs. The PSDs, measured using a laser diffrac-tion-based Malvern analyser, were probably not representative of the limestone samples because agglomeration phenomena took place when the particles were...

  4. Accelerated weathering of limestone for CO2 mitigation: Opportunities for the stone and cement industries

    Science.gov (United States)

    Langer, William H.; San, Juan A.; Rau, Greg H.; Caldeira, Ken

    2009-01-01

    Large amounts of limestone fines co-produced during the processing of crushed limestone may be useful in the sequestration of carbon dioxide (CO2). Accelerated weathering of limestone (AWL) is proposed as a low-tech method to capture and sequester CO2 from fossil fuel-fired power plants and other point sources such as cement manufacturing. AWL reactants are readily available, inexpensive and environmentally benign. Waste CO2 is hydrated with water to produce carbonic acid. This reacts with and is neutralized by limestone fines, thus converting CO2 gas to dissolved calcium bicarbonate.

  5. Techniques for Source Zone and Plume Characterization of Tetrachloroethene in Fractured Limestone Aquifers

    DEFF Research Database (Denmark)

    Fjordbøge, Annika Sidelmann; Mosthaf, Klaus; Janniche, Gry S.

    Characterization of chlorinated solvents in fractured limestone aquifers is essential for proper development of site specific conceptual models and subsequent risk assessment and remediation. High resolution characterization is challenged by the difficulties involved in collection of intact core...... an improved conceptual understanding of contaminant transport. At both sites limestone cores were collected with significant core losses. The discrete quantification of chlorinated solvents in the retrieved limestone cores was compared to different FLUTe technologies at the DNAPL site and passive and active...... distribution compared to the data obtained by quantification of chlorinated solvents in the limestone cores....

  6. The effect of water on the sulphation of limestone

    Energy Technology Data Exchange (ETDEWEB)

    Chunbo Wang; Lufei Jia; Yewen Tan; E.J. Anthony [North China Electric Power University, Baoding City (China). School of Energy and Power Engineering

    2010-09-15

    A series of tests was conducted in a thermogravimetric analyzer (TGA) to study the sulphation behaviour of limestone in the presence of water over the temperature range of 800-850{sup o}C. Four different Canadian limestones, all with a particle size range of 75-425 {mu}m, were sulphated using a synthetic flue gas with a composition of 15% CO{sub 2}, 3% O{sub 2}, 0% or 10% H{sub 2}O, 1750 ppm SO{sub 2} and the balance N{sub 2}. Water was shown to have a significant promotional effect on sulphation, especially in the diffusion-controlled stage. However, the effect of water during the kinetic-controlled stage appeared to be much less pronounced. Based on these results, it is proposed that the presence of water leads to the transient formation of Ca(OH){sub 2} as an intermediate, which in turn reacts with SO{sub 2} at a faster rate than CaO does. Alternatively stated, it appears that H{sub 2}O acts as catalyst for the sulphation reaction of CaO. 30 refs., 8 figs., 3 tabs.

  7. Laser removal of water repellent treatments on limestone

    Energy Technology Data Exchange (ETDEWEB)

    Gomez-Heras, Miguel; Alvarez de Buergo, Monica; Rebollar, Esther; Oujja, Mohamed; Castillejo, Marta; Fort, Rafael

    2003-12-15

    Protective and water repellent treatments are applied on stone materials used on buildings or sculptures of artistic value to reduce water intrusion without limiting the natural permeability to water vapour of the material. The effect of the wavelength associated with the laser removal of two water repellent treatments applied on limestone, Paraloid B-72, a copolymer of methyl acrylate and ethyl methacrylate, and Tegosivin HL-100, a modified polysiloxane resin, was investigated by using the four harmonics of a Q-switched Nd:YAG laser (1064, 532, 355 and 266 nm). The modifications induced on the surface of limestone samples by laser irradiation were studied using colorimetry, roughness measurements and scanning electron microscopy (SEM). The removal of the treatments was found to be dependent on the laser irradiation conditions and on the characteristics of the coatings. The fundamental laser radiation was effective in removing both treatments, but thermal alteration processes were induced on the constituent calcite crystals. The best results were obtained by irradiation in the near UV at 355 nm.

  8. Rare earths in the Leadville Limestone and its marble derivates

    International Nuclear Information System (INIS)

    Jarvis, J.C.; Wildeman, T.R.; Banks, N.G.

    1975-01-01

    Samples of unaltered and metamorphosed Leadville Limestone (Mississippian, Colorado) were analyzed by neutron activation for ten rare-earth elements (REE). The total abundance of the REE in the least-altered limestone is 4-12 ppm, and their distribution patterns are believed to be dominated by the carbonate minerals. The abundances of the REE in the marbles and their sedimentary precursors are comparable but the distribution patterns are not. Eu is enriched over the other REE in the marbles, and stratigraphically upward in the formation (samples located progressively further from the heat source), the light REE become less enriched relative to the heavy REE. The Eu anomaly is attributed to its ability, unique among the REE, to change from the 3+ to 2+ oxidation state. Whether this results in preferential mobilization of the other REE or whether this reflects the composition of the pore fluid during metamorphism is unknown. Stratigraphically selective depletion of the heavy REE may be attributed to more competition for the REE between fluid and carbonate minerals in the lower strata relative to the upper strata. This competition could have been caused by changes in the temperature of the pore fluid or to the greater resistance to solution of the dolomite in the lower parts of the formation than the calcite in the upper parts

  9. Colmenar limestone as a resource for built heritage

    Science.gov (United States)

    Fort, Rafael; Álvarez de Buergo, Mónica; Varas-Muriel, MªJosé; Mercedes Pérez-Monserrat, Elena

    2013-04-01

    The Colmenar stone (or Colmenar limestone) has been used in the construction of significant builidings of the Central area of Spain, such as the Royal Palace of Aranjuez (16th -18th centuries) or the Royal Palace of Madrid (18th century). Nowadays this building stone is still widely used, both for new construction and restoration works, as well as for the indoor ornamentation of emblematic buildings such as the Royal Theater of Madrid (20th century). There are many quarries from where this stone was exploited, being the most prestigious ones those located in Colmenar de Oreja, at 50 km Southeast the city of Madrid. The high quality of the stone in these quarries, its whiteness and pureness, made this locality the most relevant in these stonés extractive activities, concentrating the most relevant exploitations and providing the stone the denomination of the municipality (Colmenar). It was an underground mining extraction until the 20th century in order to reach the highest quality level of the mine, the so called "Banco Gordo" (Thick Bank). Generically known as moorland limestone, this rock belongs to the fluvial-lacustrine carbonates of the Upper Miocene Unit of the Tertiary Madrid's Basin. Its tonality mainly ranges from white to cream and even light grey. Under a petrographic point of view, this limestone is constituted by 40% of bioclasts (characea, ostracods and gasteropods), 20-30% of micritic matrix and 30-40% of sparitic cement. Therefore, it can be classified as a biomicrite/biosparite limestone or as a bioclastic packstone. Some particularities of these limestones regarding their appearance are related to some karstic processes they underwent linked to some dissolution phenomena during the Pliocene. All of this resulted on an abundance of cavities with terra rossa fillings, a non-soluble clayey residue, iron enriched, which is the responsible for the reddish and pinkish color that the Colmenar stone sometimes shows. These petrographic characteristics

  10. Salmonella Control Programs in Denmark

    DEFF Research Database (Denmark)

    Wegener, Henrik Caspar; Hald, Tine; Wong, Danilo Lo Fo

    2003-01-01

    We describe Salmonella control programs of broiler chickens, layer hens, and pigs in Denmark. Major reductions in the incidence of foodborne human salmonellosis have occurred by integrated control of farms and food processing plants. Disease control has been achieved by monitoring the herds...... and flocks, eliminating infected animals, and diversifying animals (animals and products are processed differently depending on Salmonella status) and animal food products according to the determined risk. In 2001, the Danish society saved U.S.$25.5 million by controlling Salmonella. The total annual...... Salmonella control costs in year 2001 were U.S.$14.1 million (U.S.$0.075/kg of pork and U.S.$0.02/kg of broiler or egg). These costs are paid almost exclusively by the industry. The control principles described are applicable to most industrialized countries with modern intensive farming systems....

  11. Consumer food waste in Denmark

    DEFF Research Database (Denmark)

    Stancu, Violeta; Lähteenmäki, Liisa

    Linket til højre henviser til rapporten i trykt format til download. Dokumentet over linket er selve leveringen til ministeriet med følgebrev. Household food waste is one of the main contributors to the food waste amounts across the food supply chain. This report is based on a study conducted...... in September 2017 by MAPP Research Centre – Research on Value Creation in the Food Sector. The study aimed to examine consumer food waste, with a focus on consumer perceptions and practices related to food waste. A survey was completed by 508 respondents in Denmark to provide insights into self......-reported consumer food waste, consumer understanding and perceptions of food waste, household food-related practices as well as individual and household characteristics with a role in food waste....

  12. Offshore Wind Energy in Denmark

    DEFF Research Database (Denmark)

    Möller, Bernd; Hong, Lixuan; Hvelplund, Frede

    for Denmark and invites to reconsider the technological and institutional choices made. Based on a continuous resource-economic model operating in a geographical information systems (GIS) environment, which describes resources, costs and area constraints in a spatially explicit way, the relation between......Offshore wind energy has developed in terms of turbine and project size, and currently undergoes a significant up-scaling to turbines and parks at greater distance to shore and deeper waters. Expectations to the positive effect of economies of scale on power production costs, however, have...... availability of locations, driven by accelerating requirements of environmental concern, park size and public acceptance, is one important driver. Mounting risk of mega-projects and the infinite demand for renewable energy is another likely cause. The present paper addresses the scale of offshore wind parks...

  13. Wind energy planning in Denmark

    International Nuclear Information System (INIS)

    Godtfredsen, F.; Lemming, J.; Nielsen, S.R.; Jessien, S.

    1992-01-01

    The total capacity of the about 3300 Danish wind turbines is approximately 450 MW. Most of the wind turbines have been erected detached or in small clusters by private citizens - especially by joint ownership. 100 MW of the capacity have been installed by the power companies, mainly in wind farms. Up till now the privately owned wind turbines have been erected without a previous planning process. Increased expansion of wind energy makes demands on physical planning, since access to suitable locations in Denmark is limited. Hence more coordination is called for between the interested parties to ensure optimal utilization of the sites allocated by the physical planning authorities. A siting committee appointed by the Government has recommended locations for additional 100 MW power company wind farms as well as a more detailed planning in each local community. The detailed planning in the municipality of Thisted is described. (au)

  14. Bundling ecosystem services in Denmark

    DEFF Research Database (Denmark)

    Turner, Katrine Grace; Odgaard, Mette Vestergaard; Bøcher, Peder Klith

    2014-01-01

    We made a spatial analysis of 11 ecosystem services at a 10 km × 10 km grid scale covering most of Denmark. Our objective was to describe their spatial distribution and interactions and also to analyze whether they formed specific bundle types on a regional scale in the Danish cultural landscape....... We found clustered distribution patterns of ecosystem services across the country. There was a significant tendency for trade-offs between on the one hand cultural and regulating services and on the other provisioning services, and we also found the potential of regulating and cultural services...... to form synergies. We identified six distinct ecosystem service bundle types, indicating multiple interactions at a landscape level. The bundle types showed specialized areas of agricultural production, high provision of cultural services at the coasts, multifunctional mixed-use bundle types around urban...

  15. Housing and energy in Denmark

    DEFF Research Database (Denmark)

    Marsh, Rob; Grupe Larsen, Vibeke; Kragh, Mikkel

    2010-01-01

      This paper examines the historical background, current context and future challenges for housing energy consumption in Denmark. There has been a radical transformation in housing energy consumption over the last 30 years, with an absolute reduction in heat consumption and a rapid growth...... in electricity consumption, reflecting wider technological and social transformations in the movement from an industrial to a knowledge based society. In new housing it is shown that electricity consumption now dominates the total primary energy consumption, and that as a consequence traditional heat saving...... paradigms are relatively less effective, and can result in overheating and rising electricity consumption. At the same time, climate change concerns show that rising temperatures will in the future result in a falling heat demand and increasing cooling demand in housing. With this background, a theoretical...

  16. Diabetes among migrants in Denmark

    DEFF Research Database (Denmark)

    Andersen, Gregers Stig; Kamper-Jørgensen, Zaza; Carstensen, Bendix

    2016-01-01

    Objective Studies of diabetes in migrant populations have shown a higher prevalence compared to their respective countries of origin and to people natively born in the host country, but there is little population-based data on diabetes incidence and mortality in migrant populations. The aim...... of the current study was (1) to describe the incidence rates and prevalence of diabetes among first generation migrants in Denmark compared to the Danish background population, and (2) to compare standardised mortality rates (SMRs) for individuals with and without diabetes according to country of origin...... to the part of the population without diabetes were calculated based on follow up of the entire Danish population. Results Compared with native born Danes, the incidence of diabetes was about 2.5 times higher among migrants from Africa, Asia, and the Middle East, and these migrant groups also showed...

  17. Nontuberculous pulmonary mycobacteriosis in Denmark

    DEFF Research Database (Denmark)

    Andréjak, Claire; Thomsen, Vibeke Ø; Johansen, Isik Somuncu

    2010-01-01

    RATIONALE: Few population-based data are available regarding nontuberculous mycobacteria (NTM) pulmonary disease epidemiology and prognosis. OBJECTIVES: To examine NTM pulmonary colonization incidence, disease incidence, and prognostic factors. METHODS: All adults in Denmark with at least one NTM......-positive pulmonary specimen during 1997 to 2008 were identified using national medical databases and were categorized as having possible or definite NTM disease or colonization. MEASUREMENTS AND MAIN RESULTS: We calculated annual age-standardized NTM incidence rates and adjusted hazard ratios (HR) of death...... associated with patient age, sex, comorbidity, NTM species, and NTM disease status. Of 1,282 adults with 2,666 NTM-positive pulmonary specimens, 335 (26%) had definite NTM disease, 238 (19%) possible disease, and 709 (55%) colonization only. NTM incidence rates decreased until 2002, followed by an increase...

  18. Law and Protestantism in Denmark

    DEFF Research Database (Denmark)

    Tamm, Ditlev

    2016-01-01

    This contribution deals with the influence of the Reformation on the law in Denmark. The Reformation was basically a reform of the church, but it also affected the concept of law and state in general. In 1536, King Christian III dismissed the catholic bishops and withheld the property of the church....... The king, as custos duarum tabularum, guardian of both the tablets of law, also took over the legislation for the church. Especially in subjects of morals and criminal law new principles and statutes were enacted. Copenhagen University was reformed into a protestant seminary even though the former...... faculties were maintained. For that task Johannes Bugenhagen was summoned who also drafted the new church ordinance of 1537. In marriage law protestant principles were introduced. A marriage order was established in 1582....

  19. Energy use in Denmark: An international perspective

    Energy Technology Data Exchange (ETDEWEB)

    Schipper, L.; Howarth, R.; Andersson, B.; Price, L.

    1992-08-01

    This report analyzes the evolution use in Denmark since the early 1970s in order to shed light on the future path of energy use in Denmark, with particular emphasis on the role of energy efficiency. The authors found that improvements in end-use energy efficiency reduced primary energy requirements in Denmark by 22% between 1972 and 1988. Focusing on developments in six individual sectors of the Danish economy (residential, manufacturing, other industry, service, travel, and freight), they found that the residential, manufacturing, and service sectors have led the improvements in efficiency. Travel showed few significant improvements and the efficiency of freight transportation worsened. The international comparisons showed that the structure of energy use in Denmark is less energy-intensive than that of most high-income OECD countries, with the exception of Japan. Overall, they concluded that most of the energy savings achieved in Denmark were brought about through improvements in technology. They also found that an important stimulus for improved efficiency was higher energy prices, led in no small part by significant taxes imposed on small consumers of heating oil, electricity, and motor fuels. Energy-efficiency programs accelerated energy savings in homes and commercial buildings. The rate of improvement of energy efficiency in Denmark has slowed down significantly since 1984, consistent with trends observed in other major countries. While many of the energy-efficiency goals stated or implied in Denmark`s Energi 2000 are achievable over a very long period, present trends do not point towards achievement of these goals by 2010 or even 2020. Strong measures will have to be developed by both public and private authorities if energy efficiency is to make a key contributions to reducing environmental problems associated with energy use in Denmark.

  20. Direct Democracy in Local Politics in Denmark

    DEFF Research Database (Denmark)

    Svensson, Palle

    2007-01-01

    Elements of  direct democracy at the local level does exist in Denmark, but it is little known, because no formal rules regulate this aspect of political life, because results from popular initiatives and referendums are not recorded in official statistics, and because few systematic analyses have...... been published. This paper, accordingly, has an explorative nature and asks two basic questions: What is the current state of direct democracy at the local level in Denmark, and what are the prospects for a further development of direct democracy at the local level in Denmark? The paper is based...

  1. The Western Denmark Cardiac Computed Tomography Registry

    DEFF Research Database (Denmark)

    Nielsen, Lene Hüche; Nørgaard, Bjarne Linde; Tilsted, Hans-Henrik

    2014-01-01

    BACKGROUND: As a subregistry to the Western Denmark Heart Registry (WDHR), the Western Denmark Cardiac Computed Tomography Registry (WDHR-CCTR) is a clinical database established in 2008 to monitor and improve the quality of cardiac computed tomography (CT) in Western Denmark. OBJECTIVE: We...... examined the content, data quality, and research potential of the WDHR-CCTR. METHODS: We retrieved 2008-2012 data to examine the 1) content; 2) completeness of procedure registration using the Danish National Patient Registry as reference; 3) completeness of variable registration comparing observed vs...

  2. Low-Wage Work in Denmark

    DEFF Research Database (Denmark)

    Westergård-Nielsen, Niels Chr.

    2008-01-01

    not stay in low-wage jobs for long. Many go on to higher paying jobs, while a significant minority ends up relying temporarily on income support and benefits sustained by one of the highest tax rates in the world.  Low-Wage Work in Denmark provides an insightful look at the particularities of the Danish...... with detailed case studies of five industries to explore why low-end jobs are so different in Denmark. Some jobs that are low-paying in the United States, including hotel maids and meat processors, though still demanding, are much more highly compensated in Denmark. And Danes, unlike American workers, do...

  3. The Strange Birth of Liberal Denmark

    DEFF Research Database (Denmark)

    Henriksen, Ingrid; Lampe, Markus; Sharp, Paul Richard

    The usual story of the "first era of globalization" at the end of the nineteenth century sees Denmark as something as an outlier: a country which, like Britain, resisted the globalization backlash in the wake of the inflow of cheap grain from the New World, but where agriculture, rather than going...... into decline, in fact flourished. Key to the success of Danish agriculture was an early diversification towards dairy production. We dispute this simple story which sees Denmark as something of a liberal paragon. Denmark's success owed much to a prudent use of trade policy which favoured dairy production...

  4. Compressive strength evolution of thermally-stressed Saint Maximin limestone.

    Science.gov (United States)

    Farquharson, J.; Griffiths, L.; Baud, P.; Wadsworth, F. B.; Heap, M. J.

    2017-12-01

    The Saint Maximin quarry (Oise, France) opened in the early 1600s, and its limestone has been used extensively as masonry stone, particularly during the classical era of Parisian architecture from the 17th century onwards. Its widespread use has been due to a combination of its regional availability, its high workability, and its aesthetic appeal. Notable buildings completed using this material include sections of the Place de la Concorde and the Louvre in Paris. More recently, however, it has seen increasing use in the construction of large private residences throughout the United States as well as extensions to private institutions such as Stanford University. For any large building, fire hazard can be a substantial concern, especially in tectonically active areas where catastrophic fires may arise following large-magnitude earthquakes. Typically, house fires burn at temperatures of around 600 °C ( 1000 F). Given the ubiquity of this geomaterial as a building stone, it is important to ascertain the influence of heating on the strength of Saint Maximin limestone (SML), and in turn the structural stability of the buildings it is used in. We performed a series of compressive tests and permeability measurements on samples of SML to determine its strength evolution in response to heating to incrementally higher temperatures. We observe that the uniaxial compressive strength of SML decreases from >12 MPa at room temperature to 400 °C). We anticipate that this substantial weakening is in part a result of thermal microcracking, whereby changes in temperature induce thermal stresses due to a mismatch in thermal expansion between the constituent grains. This mechanism is compounded by the volumetric increase of quartz through its alpha - beta transition at 573 °C, and by the thermal decomposition of calcite. To track the formation of thermal microcracks, we monitor acoustic emissions, a common proxy for microcracking, during the heating of an SML sample. The

  5. Oriented nucleation and growth of anhydrite during direct sulfation of limestone

    DEFF Research Database (Denmark)

    Hu, Guilin; Dam-Johansen, Kim; Wedel, Stig

    2008-01-01

    The direct sulfation of limestone (Iceland Spar) was studied at 973 K in a fixed-bed reactor. Scanning electron microscopy examinations of the sulfated limestone particles show that the sulfation process involves oriented nucleation and growth of the solid product, anhydrite. The reason...

  6. Model for the sulfidation of calcined limestone and its use in reactor models.

    NARCIS (Netherlands)

    Heesink, Albertus B.M.; Brilman, Derk Willem Frederik; van Swaaij, Willibrordus Petrus Maria

    1998-01-01

    A mathematical model describing the sulfidation of a single calcined limestone particle was developed and experimentally verified. This model, which includes no fitting parameters, assumes a calcined limestone particle to consist of spherical grains of various sizes that react with H2S according to

  7. Development of engineered cementitious composites with limestone powder and blast furnace slag

    NARCIS (Netherlands)

    Zhou, J.; Qian, S.; Sierra Beltran, M.G.; Ye, G.; Van Breugel, K.; Li, V.C.

    2009-01-01

    Nowadays limestone powder and blast furnace slag (BFS) are widely used in concrete as blended materials in cement. The replacement of Portland cement by limestone powder and BFS can lower the cost and enhance the greenness of concrete, since the production of these two materials needs less energy

  8. LATEST TOURNAISIAN (EARLY CARBONIFEROUS CONODONTS FROM THE TABAI LIMESTONE, TIRAH, NORTHWESTERN PAKISTAN

    Directory of Open Access Journals (Sweden)

    FAZL-I-RABBI KHAN

    2004-11-01

    Full Text Available A new stratigraphic unit, the Tabai Limestone of the poorly known Tirah area of northwest Pakistan, is one of several Early Carboniferous carbonate units distributed along the North Gondwana margin, some connected with transgressive interludes. The Tabai Limestone has produced latest Tournaisian (Early Carboniferous conodonts indicative of the middle of the anchoralis-latus Zone.

  9. STEAM ENHANCED REMEDIATION RESEARCH FOR DNAPL IN FRACTURED ROCK, LORING AIR FORCE BASE, LIMESTONE, MAINE

    Science.gov (United States)

    This report details a research project on Steam Enhanced Remediation (SER) for the recovery of volatile organic compounds from fractured limestone that was carried out at the Quarry at the former Loring Air Force Base in Limestone, Maine. This project was carried out by USEPA, Ma...

  10. Holocene limestones of part of the western continental shelf of India

    Digital Repository Service at National Institute of Oceanography (India)

    Nair, R.R.; Hashimi, N.H.; Guptha, M.V.S.

    , while those on te upper continental slope (130-180 m) are algal bryozoan limestones. The limestones have a radiocarbon age ranging between 9,000 and 11,000 years. Depositional environmental on the continental shelf during the Holocene appears...

  11. Evaluation of the Efficiency of Limestone Powder in Concrete and the Effects on the Environment

    Directory of Open Access Journals (Sweden)

    Yoo-Jae Kim

    2018-02-01

    Full Text Available The major environmental impact of concrete comes from the CO2 emissions, produced during the cement manufacturing process. The main goal of this research project is to evaluate the efficiency of limestone powder as a partial cement replacement, in order to reduce energy consumption and CO2 emissions. This study utilizes limestone powders, with different particle sizes, to replace a portion of Portland cement using various ratios. Due to the dilution effect when partially replacing cement, there is a reduction in the concrete’s physical properties. To assess the dilution effect, a modification to Féret’s equation is used to calculate an efficiency factor for the limestone powder when compared to cement. To measure the environmental impact, a life cycle assessment is conducted on concrete made with limestone powder combined with cement. This allows for an evaluation of the various cement/limestone powder ratios that will maximize the environmental benefit, with minimal reduction in concrete strength. Additional microstructural analysis using petrographic examination was completed to provide a visual understanding of the distribution of the limestone particles within the cement paste. The results indicate that the efficiency of limestone powder in partially replacing cement can be achieved by particle packing and particle distribution in the concrete and the benefits of emission reductions exceed the loss in compressive strength when higher levels of limestone powder is used to replace cement.

  12. Semiplanus (Productida, Brachiopoda) from the Carboniferous limestone of Kotaki, Niigata Prefecture, central Japan

    OpenAIRE

    Ibaraki, Yousuke; Sato, Kiichi

    2013-01-01

    An Early Carboniferous large–sized productid brachiopod species, Semiplanus semiplanus (Schwetzow, 1922), is described from the Tsuchikurazawa Limestone (upper Visean–Serpukhovian), a limestone block within a Permian accretionary complex, distributed in the Kotaki area, Itoigawa City, Niigata Prefecture, central Japan. This is the first record of Semipanus species from Japan.

  13. Adsorption and desorption of phosphate on limestone in experiments simulating seawater intrusion

    Science.gov (United States)

    The absorption and desorption of phosphorus on a large block of limestone was investigated using deionized water (DIW) and seawater. The limestone had a high affinity to adsorb phosphorus in DIW. Phosphate adsorption was significantly less in seawater, and more phosphorus was desorbed in the seawate...

  14. Effect of limestone particle size and calcium to non-phytate phosphorus ratio on true ileal calcium digestibility of limestone for broiler chickens.

    Science.gov (United States)

    Anwar, M N; Ravindran, V; Morel, P C H; Ravindran, G; Cowieson, A J

    2016-10-01

    The purpose of this study was to determine the effect of limestone particle size and calcium (Ca) to non-phytate phosphorus (P) ratio on the true ileal Ca digestibility of limestone for broiler chickens. A limestone sample was passed through a set of sieves and separated into fine (digestibility of Ca was calculated using the indicator method and corrected for basal endogenous losses to determine the true Ca digestibility. The basal ileal endogenous Ca losses were determined to be 127 mg/kg of dry matter intake. Increasing Ca:non-phytate P ratios reduced the true Ca digestibility of limestone. The true Ca digestibility coefficients of limestone with Ca:non-phytate P ratios of 1.5, 2.0 and 2.5 were 0.65, 0.57 and 0.49, respectively. Particle size of limestone had a marked effect on the Ca digestibility, with the digestibility being higher in coarse particles (0.71 vs. 0.43).

  15. Limestone fragmentation and attrition during fluidized bed oxyfiring

    Energy Technology Data Exchange (ETDEWEB)

    Fabrizio Scala; Piero Salatino [Istituto di Ricerche sulla Combustione - CNR, Napoli (Italy)

    2010-04-15

    Attrition/fragmentation of limestone under simulated fluidized bed oxyfiring conditions was investigated by means of an experimental protocol that had been previously developed for characterization of attrition/fragmentation of sorbents in air-blown atmospheric fluidized bed combustors. The protocol was based on the use of different and mutually complementary techniques. The extent and pattern of attrition by surface wear in the dense phase of a fluidized bed were assessed in experiments carried out with a bench scale fluidized bed combustor under simulated oxyfiring conditions. Sorbent samples generated during simulated oxyfiring tests were further characterized from the standpoint of fragmentation upon high velocity impact by means of a purposely designed particle impactor. Results showed that under calcination-hindered conditions attrition and fragmentation patterns are much different from those occurring under air-blown atmospheric combustion conditions. Noteworthy, attrition/fragmentation enhanced particle sulfation by continuously regenerating the exposed particle surface. 13 refs., 8 figs.

  16. Sierra Elvira limestone: petrophysical characteristics of an Andalusian heritage stone

    Directory of Open Access Journals (Sweden)

    Valverde, I.

    2008-06-01

    Full Text Available “Sierra Elvira stone” is one of the ornamental building stones most widely used in the historical monuments of eastern Andalusia. A Liassic age limestone, it appears in the central section of the Baetic Mountains and more specifically in the Middle Subbaetic domain. While the most common variety is a crinoid limestone, a micritic limestone of the same age has also been quarried, albeit in much smaller quantities. These stones form very thick beds, up to nearly 5 m deep, that run in consistently parallel lines and have a dip angle that facilitates quarrying.With petrographic, physical and mechanical properties that ensure stone strength and durability, it is a high quality building material suitable for both structural and ornamental purposes. These properties can be attributed to the minimal open porosity and concomitant excellent water resistance that characterize the stone, as well as to its high mechanical strength and low textural anisotropy, both elastic and mechanical. With such attributes, the stone can be successfully used for any number of purposes, including decorative stonework (portals, fountains, plinths, structural members (column shafts and bases or urban curbing and paving. Intervention on Sierra de Elvira limestone structures should be limited to cleaning or repair, for consolidating or protective materials are scantly effective.La “Piedra de Sierra Elvira” constituye una de las piedras ornamentales más significativas del Patrimonio Arquitectónico de Andalucía Oriental. Es una roca caliza del Lias que aflora en el Subbético Medio del sector central de las Cordilleras Béticas. El litotipo más explotado es una caliza con crinoides, en bastante menor importancia se ha extraído también otra caliza micrítica de la misma edad. Los bancos son muy potentes, en algunos casos de más de 5 m, con un paralelismo constante y un buzamiento que favorece su explotación en los frentes de cantera.Sus caracter

  17. Limestone-Concentrate-Pellet Roasting in wet Carbon Dioxide

    Institute of Scientific and Technical Information of China (English)

    1990-01-01

    A roast process for treating chalcopyrite concentrate was developed. The investigation of the reaction of limestone-concentrate-pellet in a wet carbon dioxide flow was carried out by means of a thermogravimetric analysis (TGA) to determine at which temperatures the roasting reaction would take place. The thermodynamic calculations on the roast reaction were made by the use of SOLGASMIX-PV program. The TGA curves and thermodynamic calculations indicated that the conversion of chalcopyrite into bornite took place at about 975K, and the conversion of bornite into chalcocite at 1065-1123K. The thermodynamic calculations also showed that the sulfur released was fixed as calcium sulfide within roasted pellets. X-ray diffraction examination identified these phases in products.

  18. Experienced materials in wet limestone-gypsum FGD system

    Energy Technology Data Exchange (ETDEWEB)

    Hasegawa, S. [Mitsubishi Heavy Industry, Hiroshima (Japan). Hiroshima Research and Development Center; Iwashita, K.; Ochi, E.; Higuchi, T. [Mitsubishi heavy Industry, Yokohama (Japan)

    1998-12-31

    This study was made on the corrosion resistivity evaluation method used for material selection in the Wet Limestone-Gypsum FGD system with examples of various process configuration, their corrosion environment, and the materials used in them. The wet limestone-gypsum process FGD plant is broadly divided into two types-ash-separated (dual-loop) process, and ash-mixed (single-loop) process-depending on whether the flue gas is separated from ash before being led into the absorber or led as it is into the absorber mixed with ash. Presently, the single-loop process has become the mainstream process however. The dual -loop process comprises a dedusting tower (quencher) and an absorption tower (absorber). In the quencher ash is removed with sprayed water where most of the HCl, HF etc., and a part of SO{sub x} and NO{sub x} contained in the flue gas are also removed with absorption. On the contrary, in the single-loop process which is configured of only the absorber, the flue gas is introduced into it as it is contained with ash, SO{sub x}, NO{sub x}, HCl, HF etc. The corrosion environment in these plants largely differs depending on the process type and condition. The absorber recirculated liquid has various ion inclusions among which Cl{sup {minus}} promotes pitting corrosion and crevice corrosion while SO{sub 4}{sup 2{minus}} inhibits these corrosions. Both Cl{sup {minus}} and SO{sub 4}{sup 2{minus}} cover an extremely large range between 25 to 100,000 ppm and 564 to 73,600 ppm respectively, and their influence on the corrosion is related to their activity which is decided by Ca{sup 2+}, Mg{sup 2+}, Na{sup +}, NH{sub 4}{sup +}, H{sup +} and liquid temperature. The balance of these ions is decided by the gas composition, limestone composition, make-up water and wastewater mass balance etc., of individual plants. Accordingly, materials of FGD plant are selected on the basis of evaluated results of corrosion resistivity test made under such simulated process conditions of

  19. SLAM: a sodium-limestone concrete ablation model

    International Nuclear Information System (INIS)

    Suo-Anttila, A.J.

    1983-12-01

    SLAM is a three-region model, containing a pool (sodium and reaction debris) region, a dry (boundary layer and dehydrated concrete) region, and a wet (hydrated concrete) region. The model includes a solution to the mass, momentum, and energy equations in each region. A chemical kinetics model is included to provide heat sources due to chemical reactions between the sodium and the concrete. Both isolated model as well as integrated whole code evaluations have been made with good results. The chemical kinetics and water migration models were evaluated separately, with good results. Several small and large-scale sodium limestone concrete experiments were simulated with reasonable agreement between SLAM and the experimental results. The SLAM code was applied to investigate the effects of mixing, pool temperature, pool depth and fluidization. All these phenomena were found to be of significance in the predicted response of the sodium concrete interaction. Pool fluidization is predicted to be the most important variable in large scale interactions

  20. Geochemistry, environmental and provenance study of the Middle Miocene Leitha limestones (Central Paratethys)

    Science.gov (United States)

    Ali, Ahmed; Wagreich, Michael

    2017-06-01

    Mineralogical, major, minor, REE and trace element analyses of rock samples were performed on Middle Miocene limestones (Leitha limestones, Badenian) collected from four localities from Austria (Mannersdorf, Wöllersdorf, Kummer and Rosenberg quarries) and the Fertőrákos quarry in Hungary. Impure to pure limestones (i.e. limited by Al2O3 contents above or below 0.43 wt. %) were tested to evaluate the applicability of various geochemical proxies and indices in regard to provenance and palaeoenvironmental interpretations. Pure and impure limestones from Mannersdorf and Wöllersdorf (southern Vienna Basin) show signs of detrital input (REEs = 27.6 ± 9.8 ppm, Ce anomaly = 0.95 ± 0.1 and the presence of quartz, muscovite and clay minerals in impure limestones) and diagenetic influence (low contents of, e.g., Sr = 221 ± 49 ppm, Na is not detected, Ba = 15.6 ± 8.8 ppm in pure limestones). Thus, in both limestones the reconstruction of original sedimentary palaeoenvironments by geochemistry is hampered. The Kummer and Fertőrákos (Eisenstadt-Sopron Basin) comprise pure limestones (e.g., averages Sr = 571 ± 139 ppm, Na = 213 ± 56 ppm, Ba = 21 ± 4 ppm, REEs = 16 ± 3 ppm and Ce anomaly = 0.62 ± 0.05 and composed predominantly of calcite) exhibiting negligible diagenesis. Deposition under a shallow-water, well oxygenated to intermittent dysoxic marine environment can be reconstructed. Pure to impure limestones at Rosenberg-Retznei (Styrian Basin) are affected to some extent by detrital input and volcano-siliciclastic admixture. The Leitha limestones at Rosenberg have the least diagenetic influence among the studied localities (i.e. averages Sr = 1271 ± 261 ppm, Na = 315 ± 195 ppm, Ba = 32 ± 15 ppm, REEs = 9.8 ± 4.2 ppm and Ce anomaly = 0.77 ± 0.1 and consist of calcite, minor dolomite and quartz). The siliciclastic sources are characterized by immobile elemental ratios (i.e. La/Sc and Th/Co) which apply not only for the siliciclastics, but also for marls and

  1. Geochemistry, environmental and provenance study of the Middle Miocene Leitha limestones (Central Paratethys

    Directory of Open Access Journals (Sweden)

    Ali Ahmed

    2017-06-01

    Full Text Available Mineralogical, major, minor, REE and trace element analyses of rock samples were performed on Middle Miocene limestones (Leitha limestones, Badenian collected from four localities from Austria (Mannersdorf, Wöllersdorf, Kummer and Rosenberg quarries and the Fertőrákos quarry in Hungary. Impure to pure limestones (i.e. limited by Al2O3 contents above or below 0.43 wt. % were tested to evaluate the applicability of various geochemical proxies and indices in regard to provenance and palaeoenvironmental interpretations. Pure and impure limestones from Mannersdorf and Wöllersdorf (southern Vienna Basin show signs of detrital input (REEs = 27.6 ± 9.8 ppm, Ce anomaly = 0.95 ± 0.1 and the presence of quartz, muscovite and clay minerals in impure limestones and diagenetic influence (low contents of, e.g., Sr = 221 ± 49 ppm, Na is not detected, Ba = 15.6 ± 8.8 ppm in pure limestones. Thus, in both limestones the reconstruction of original sedimentary palaeoenvironments by geochemistry is hampered. The Kummer and Fertőrákos (Eisenstadt–Sopron Basin comprise pure limestones (e.g., averages Sr = 571 ± 139 ppm, Na = 213 ± 56 ppm, Ba = 21 ± 4 ppm, REEs = 16 ± 3 ppm and Ce anomaly = 0.62 ± 0.05 and composed predominantly of calcite exhibiting negligible diagenesis. Deposition under a shallow-water, well oxygenated to intermittent dysoxic marine environment can be reconstructed. Pure to impure limestones at Rosenberg–Retznei (Styrian Basin are affected to some extent by detrital input and volcano-siliciclastic admixture. The Leitha limestones at Rosenberg have the least diagenetic influence among the studied localities (i.e. averages Sr = 1271 ± 261 ppm, Na = 315 ± 195 ppm, Ba = 32 ± 15 ppm, REEs = 9.8 ± 4.2 ppm and Ce anomaly = 0.77 ± 0.1 and consist of calcite, minor dolomite and quartz. The siliciclastic sources are characterized by immobile elemental ratios (i.e. La/Sc and Th/Co which apply not only for the siliciclastics, but also

  2. Environmental economy account for Denmark 2003

    International Nuclear Information System (INIS)

    Anon.

    2005-01-01

    The environmental economy account for Denmark shows that the contribution to acidification in Denmark increased with 1% from 2002 to 2003, while the contribution to the greenhouse effect increased with 11,3%. The latter covers an increase of 19,3 % from the energy supply and an increase of 22,4% from Danish ships' bunkering outside Denmark. The environmental account for Denmark presents accounts of the energy consumption (and water consumption) of the industrial branches and the households together with their emission of pollutants to the atmosphere. The account also contains information about the environmental taxes and subsidies that rest with industry and households. Finally, volume and value are presented of the oil and gas reserves in the North Sea. The environmental account combines environmental data with the Danish National Accounts, making it possible to analyse the relation between economy and environment. (ln)

  3. Environmental economy account for Denmark 2001

    International Nuclear Information System (INIS)

    Anon.

    2003-01-01

    The environmental economy account for Denmark shows that the contribution to acidification in Denmark decreased with 11% from 2000 to 2001 while the contribution to the greenhouse effect decreased with 0,4%. The latter must be seen in relation to the fact that the contribution from energy consumption increased with 5,4% and that the contribution from Danish ships' bunkering outside Denmark decreased with 7,7%. The environmental account for Denmark presents accounts of the consumption of energy (and water) of the industrial branches and the households together with their emission of pollutants to the atmosphere. The account also contains information about the environmental taxes and subsidies that rest with industry and households. Finally volume and value are presented for the oil and gas reserves in the North Sea. The environmental account combines environmental data with the Danish National Accounts making it possible to analyse the relation between economy and environment. (ln)

  4. Electrokinetically Enhanced Delivery for ERD Remediation of Chlorinated Ethenes in a Fractured Limestone Aquifer

    DEFF Research Database (Denmark)

    Broholm, Mette Martina; Hyldegaard, Bente Højlund; With Nedergaard, Lærke

    causing very long remediation timeframes. Electrokinetics (EK) offers some unique transport processes, which can potentially overcome the diffusion limitations in the matrix. A novel technology combines ERD and EK for enhanced delivery. The combined technology (EK-BIO) has shown promising results in clay....... Experimental work on EK-BIO in limestone was conducted in a laboratory setup with limestone cores. EK was demonstrated to be promising in establishing enhanced contact between the donor lactate, bacteria, and cis-DCE within the limestone matrix. Complete dechlorination is expected to take place in the matrix......, since back diffusion limitations in the limestone matrix are overcome. This is essential for the overall time perspective of a remediation in limestone aquifers....

  5. Toxicity of acid mine pit lake water remediated with limestone and phosphorus

    Energy Technology Data Exchange (ETDEWEB)

    Neil, L.L.; McCullough, C.D.; Lund, M.A.; Evans, L.H.; Tsvetnenko, Y. [Edith Cowan University, Joondalup, WA (Australia)

    2009-11-15

    Pit lakes are increasingly common worldwide and have potential to provide many benefits. However, lake water toxicity may require remediation before beneficial end uses can be realised. Three treatments to remediate AMD (pH similar to 4.8) pit lake water containing elevated concentrations of Al and Zn from Collie, Western Australia were tested in mesocosms. Treatments were: (a) limestone neutralisation (L), (b) phosphorus amendment (P), and c) combined limestone neutralisation and phosphorus amendment (L+P). Laboratory bioassays with Ceriodaphnia cf. dubia, Chlorella protothecoides and Tetrahymena thermophila assessed remediation. Limestone neutralisation increased pH and reduced heavy metal concentrations by 98% (Al) to 14% (Mg), removing toxicity to the three test species within 2 months. Phosphorus amendment removed toxicity after 6 months of treatment. However, phosphorus amendment to prior limestone neutralisation failed to reduce toxicity more than limestone neutralisation alone. Low concentrations of both phosphorus and nitrogen appear to limit phytoplankton population growth in all treatments.

  6. Toxicity of acid mine pit lake water remediated with limestone and phosphorus.

    Science.gov (United States)

    Neil, Luke L; McCullough, Clint D; Lund, Mark A; Evans, Louis H; Tsvetnenko, Yuri

    2009-11-01

    Pit lakes are increasingly common worldwide and have potential to provide many benefits. However, lake water toxicity may require remediation before beneficial end uses can be realised. Three treatments to remediate AMD (pH approximately 4.8) pit lake water containing elevated concentrations of Al and Zn from Collie, Western Australia were tested in mesocosms. Treatments were: (a) limestone neutralisation (L), (b) phosphorus amendment (P), and (c) combined limestone neutralisation and phosphorus amendment (L+P). Laboratory bioassays with Ceriodaphnia cf. dubia, Chlorella protothecoides and Tetrahymena thermophila assessed remediation. Limestone neutralisation increased pH and reduced heavy metal concentrations by 98% (Al) to 14% (Mg), removing toxicity to the three test species within 2 months. Phosphorus amendment removed toxicity after 6 months of treatment. However, phosphorus amendment to prior limestone neutralisation failed to reduce toxicity more than limestone neutralisation alone. Low concentrations of both phosphorus and nitrogen appear to limit phytoplankton population growth in all treatments.

  7. Hydration mechanisms of ternary Portland cements containing limestone powder and fly ash

    International Nuclear Information System (INIS)

    De Weerdt, K.; Haha, M. Ben; Le Saout, G.; Kjellsen, K.O.; Justnes, H.; Lothenbach, B.

    2011-01-01

    The effect of minor additions of limestone powder on the properties of fly ash blended cements was investigated in this study using isothermal calorimetry, thermogravimetry (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) techniques, and pore solution analysis. The presence of limestone powder led to the formation of hemi- and monocarbonate and to a stabilisation of ettringite compared to the limestone-free cements, where a part of the ettringite converted to monosulphate. Thus, the presence of 5% of limestone led to an increase of the volume of the hydrates, as visible in the increase in chemical shrinkage, and an increase in compressive strength. This effect was amplified for the fly ash/limestone blended cements due to the additional alumina provided by the fly ash reaction.

  8. Optimisation of a wet FGD pilot plant using fine limestone and organic acids

    DEFF Research Database (Denmark)

    Frandsen, Jan; Kiil, Søren; Johnsson, Jan Erik

    2001-01-01

    , but the residual limestone content in the gypsum increased to somewhere between 19 and 30 wt%, making this pH range unsuitable for use in a full-scale plant. The investigations have shown that both the addition of organic acids and the use of a limestone with a fine PSD can be used to optimise wet FGD plants. (C......The effects of adding an organic acid or using a limestone with a fine particle size distribution (PSD) have been examined in a wet flue gas desulphurisation (FGD) pilot plant. Optimisation of the plant with respect to the degree of desulphurisation and the residual limestone content of the gypsum...... has been the aim of the work. In contrast to earlier investigations with organic acids, all essential process parameters (i.e. gas phase concentration profiles of SO(2), slurry pH profiles. and residual limestone in the gypsum) were considered. Slurry concentrations of adipic acid in the range of 0...

  9. Diabetes among Inuit migrants in Denmark

    DEFF Research Database (Denmark)

    Moustgaard, Helene; Bjerregaard, Peter; Borch-Johnsen, Knut

    2005-01-01

    The study aimed to estimate the prevalence of diabetes and impaired glucose intolerance (IGT) among Inuit migrants living in Denmark, and to compare with findings from Greenland. Further, we analyzed determinants for diabetes and impaired glucose metabolism.......The study aimed to estimate the prevalence of diabetes and impaired glucose intolerance (IGT) among Inuit migrants living in Denmark, and to compare with findings from Greenland. Further, we analyzed determinants for diabetes and impaired glucose metabolism....

  10. Energy Efficiency in Grocery Distribution in Denmark

    DEFF Research Database (Denmark)

    Jørgensen, Kaj

    1997-01-01

    Evaluation of the development of the energy efficiency of grocery distribution from 1960 to the present in Denmark, covering both the distribution to the shops and the shopping transport (distribution from shops to individual homes)......Evaluation of the development of the energy efficiency of grocery distribution from 1960 to the present in Denmark, covering both the distribution to the shops and the shopping transport (distribution from shops to individual homes)...

  11. Perspectives for Electric Vehicles in Denmark

    DEFF Research Database (Denmark)

    Horstmann, Jørgen; Jørgensen, Kaj

    1997-01-01

    Review of the present knowledge on electric vehicles and analysis of the energy and environmental consequences of the introduction of electric vehicles in Denmark. The report focuses on the 10-15 year time perspective.......Review of the present knowledge on electric vehicles and analysis of the energy and environmental consequences of the introduction of electric vehicles in Denmark. The report focuses on the 10-15 year time perspective....

  12. Denmark, Democracy and the Free Press

    DEFF Research Database (Denmark)

    Breiting, Søren

    2006-01-01

    What's important to Danish people in Denmark and in the world - most will argue for the importance of a free critical press, solidarity with people who need help and a peaceful world.......What's important to Danish people in Denmark and in the world - most will argue for the importance of a free critical press, solidarity with people who need help and a peaceful world....

  13. The Mobilisation of Muslim Women in Denmark

    DEFF Research Database (Denmark)

    Pristed Nielsen, Helene

    Under the headline of ‘the mobilisation of Muslim women in Denmark', this paper contains a series of introductory considerations as well as a few preliminary findings on the relatively unexplored question of how and why Muslim women in Denmark form organisations, and via their organisations...... immigrant women´s organisations, this paper aims to explore patterns of networking among these women, and the level and nature of their interaction with other organisations and societal institutions....

  14. Learning from the neighbours: Denmark

    Energy Technology Data Exchange (ETDEWEB)

    Toeller, G.

    1983-03-01

    In Denmark the owners of wind power plants monthly notify, on a volunteer basis, what number of kilowatt hours they have produced during the past weeks. From the first beginnings in 1979, the number of Danish wind power plants, which take part in the capacity statistics, has now increased to about 300. In the windy month of November in 1982, a quarter per cent of the total Danish electrical power generation has been achieved by wind power plants according to statistics and estimates. It can also be seen from the statistics which types of plants were not ready for operation or which plants generate how much capacity. A seperate calculation also shows how many operation hours a wind energy plant achieves per annum. Plants which are in the power range of 10 kW to 30 kW reach, on average, 6000 working hours. The plants of the 55 kw-type which are equipped with higher towers reach an average value of 6300 hours per annum.

  15. National construction, Denmark. Flat roofs

    Energy Technology Data Exchange (ETDEWEB)

    Rode, C

    1995-04-01

    The Paris meeting of IEA Annex 24 (held in the spring of 1991) declared a set of typical building constructions, the Heat, Air and Moisture characteristics of which should be dealt with as part of the Annex work. Each type of construction was assigned to one or more countries as their National Construction, and it has been the responsibility of each country to prepare a report on what may be regarded as common knowledge in the country on the hygrothermal behaviour of their construction. This knowledge is in part due to experimental work carried out by research bodies in the countries, and due to experience form practice. This report has two main sections: Section 2 gives a general overview of the design of the most common variants of flat roofs and common knowledge reported for such roofs. Section 3 gives an account of research projects carried out in Denmark on flat roofs to analyze their hygrothermal performance. Whenever possible, an emphasis will be put on the hygrothermal consequences of thermally insulating such constructions. (EG) 19 refs.

  16. Modeling of Hydration, Compressive Strength, and Carbonation of Portland-Limestone Cement (PLC Concrete

    Directory of Open Access Journals (Sweden)

    Xiao-Yong Wang

    2017-01-01

    Full Text Available Limestone is widely used in the construction industry to produce Portland limestone cement (PLC concrete. Systematic evaluations of hydration kinetics, compressive strength development, and carbonation resistance are crucial for the rational use of limestone. This study presents a hydration-based model for evaluating the influences of limestone on the strength and carbonation of concrete. First, the hydration model analyzes the dilution effect and the nucleation effect of limestone during the hydration of cement. The degree of cement hydration is calculated by considering concrete mixing proportions, binder properties, and curing conditions. Second, by using the gel–space ratio, the compressive strength of PLC concrete is evaluated. The interactions among water-to-binder ratio, limestone replacement ratio, and strength development are highlighted. Third, the carbonate material contents and porosity are calculated from the hydration model and are used as input parameters for the carbonation model. By considering concrete microstructures and environmental conditions, the carbon dioxide diffusivity and carbonation depth of PLC concrete are evaluated. The proposed model has been determined to be valid for concrete with various water-to-binder ratios, limestone contents, and curing periods.

  17. Diversity and biogeography of land snails (Mollusca, Gastropoda) in the limestone hills of Perak, Peninsular Malaysia

    Science.gov (United States)

    Foon, Junn Kitt; Clements, Gopalasamy Reuben; Liew, Thor-Seng

    2017-01-01

    Abstract Limestone hills are now gaining global conservation attention as hotspots for short-range endemic species. Levels of land snail endemism can be high at limestone hills, especially at hill clusters that are geographically isolated. In the State of Perak, Peninsular Malaysia, limestone hills have been opportunistically surveyed for land snails in the past, but the majority have yet to be surveyed. To address this knowledge gap, we systematically surveyed the terrestrial malacofauna of 12 limestone hills that, based on our opinion, are a representation of the limestone land snail assemblages within the State. Our inventory yielded high sampling completeness (>85%). We found 122 species of land snails, of which 34 species were unique to one of the surveyed hills. We identified 30 species that are potentially new to science. The number of land snail species recorded at each hill ranged between 39 and 63 species. Four of the sampled limestone hills namely, Prk 01 G. Tempurung, Prk 55 G. Pondok, Prk 47 Kanthan, and Prk 64 Bt Kepala Gajah, have high levels of species richness and unique species, representing 91% of the total species recorded in this study. We identified two clusters of limestone hills in central Perak with distinct differences in land snail species composition – a northern hill cluster on elevated granite bedrock and southern hill cluster in a low-lying valley surrounded by alluvial soils. As limestone hills continue to be quarried to meet the cement demand, the four identified limestone hills, along with other hills from the two clusters, warrant urgent conservation attention in order to maintain high species diversity within Perak’s terrestrial malacofauna. PMID:28769723

  18. Capture of SO2 by limestone in a 71 MWe pressurized fluidized bed boiler

    Directory of Open Access Journals (Sweden)

    Shimizu Tadaaki

    2003-01-01

    Full Text Available A 71 MWe pressurized fluidized bed coal combustor was operated. A wide variety of coals were burnt under fly ash recycle conditions. Limestone was fed to the combustor as bed material as well as sorbent. The emission of SO^ and limestone attrition rate were measured. A simple mathematical model of SO? capture by limestone with intermittent solid attrition was applied to the analysis of the present experimental results. Except for high sulfur fuel, the results of the present model agreed with the experimental results.

  19. CARBONIFEROUS CORALS AND CHAETETIDS FROM EXOTIC LIMESTONE BLOCK OF THE CRIMEA

    Directory of Open Access Journals (Sweden)

    VICTOR OGAR

    2015-11-01

    Full Text Available A chaetetid sponge and coral fauna from a Carboniferous exotic limestone block in the Lower Jurassic Esciorda olistostrome on the Bodrak River (Crimean Mountains are described for the first time. The Bodrak exotic block is composed of massive limestone. It contains the chaetetid Chaetetes (Boswellia sp., the tabulate coral Multithecopora sp., and poorly preserved rugose corals, including Dibunophyllum? sp., Cordibia? sp. and gen. et sp. indet. Only the fasciculate colonies of the rugose coral Lytvophyllum askynensis (Kossovaya, 2009 are confidently identified. The studied association of fossils is similar to that of the Donets Basin and the Urals and confirms the Lower Bashkirian age of the Bodrak limestone block. 

  20. The Demand for Rental Homes in Denmark

    DEFF Research Database (Denmark)

    Skak, Morten

    2007-01-01

    For a number of years, homeownership rates have been increasing along with increasing GDP per capita in most European countries, but not in Denmark after 2000. Why have increased real incomes kept the demand for rental housing up in Denmark? The present paper takes a closer look at the Danish dev...... traits found on the Danish housing market and the technique employed for prediction are of interest to housing researchers in other countries.......For a number of years, homeownership rates have been increasing along with increasing GDP per capita in most European countries, but not in Denmark after 2000. Why have increased real incomes kept the demand for rental housing up in Denmark? The present paper takes a closer look at the Danish...... development, and gives some indications of the future demand for rental housing in Denmark. The results indicate a future stagnant rental demand kept up by an increasing share of persons of old age and young persons undergoing education, and thus a rising homeownership rate. It is believed that the structural...

  1. Radon in the Creswell Crags Permian limestone caves

    International Nuclear Information System (INIS)

    Gillmore, G.K.; Phillips, P.S.; Denman, A.R.; Gilbertson, D.D.

    2002-01-01

    An investigation of radon levels in the caves of Creswell Crags, Derbyshire, an important Site of Special Scientific Interest (SSSI) shows that the Lower Magnesian Limestone (Permian) caves have moderate to raised radon gas levels (27-7800 Bq m -3 ) which generally increase with increasing distance into the caves from the entrance regions. This feature is partly explained in terms of cave ventilation and topography. While these levels are generally below the Action Level in the workplace (400 Bq m -3 in the UK), they are above the Action Level for domestic properties (200 Bq m -3 ). Creswell Crags has approximately 40,000 visitors per year and therefore a quantification of effective dose is important for both visitors and guides to the Robin Hood show cave. Due to short exposure times the dose received by visitors is low (0.0016 mSv/visit) and regulations concerning exposure are not contravened. Similarly, the dose received by guides is fairly low (0.4 mSv/annum) due in part to current working practice. However, the risk to researchers entering the more inaccessible areas of the cave system is higher (0.06 mSv/visit). This survey also investigated the effect of seasonal variations on recorded radon concentration. From this work summer to winter ratios of between 1.1 and 9.51 were determined for different locations within the largest cave system

  2. Environmental impact management during construction of the limestone project

    International Nuclear Information System (INIS)

    Windsor, D.C.

    1988-01-01

    The Limestone Generating Station is being constructed on the Nelson River in Northern Manitoba, and will consist of a 10 unit powerhouse, 5 gate concrete spillway and earthfill dam spanning the 1.5 km width of the Nelson River. Environmental concerns associated with the project included insufficient pre- and post-construction monitoring documenting resources present or magnitude of impacts, impacts on brook trout and lake sturgeon resources, wildlife habitat loss due to construction activities, destruction or disturbance of historic or archaeological sites, degradation of nearby water courses and fish habitat by aggregate removal, in-migration of construction personnel, and various other socio-economic impacts. An overview is provided of monitoring activities and results in the above areas, which involved numerous consultants and government agencies. The project administration and workers did not find the environmental programs, including inspection and enforcement activities, to be onerous or an impediment to the project. On the contrary, the environmental requirements assisted in the general planning for certain activities, and in the general criteria for the conduct of the activities. The work permit process was particularly useful as it defined the requirements of both parties and provided the specific standards necessary determining the acceptability of the activities. 14 refs., 1 fig

  3. Transport studies of radon in limestone underlying houses

    International Nuclear Information System (INIS)

    Gammage, R.B.; Dudney, C.S.; Wilson, D.L.; Saultz, R.J.

    1990-01-01

    In hilly limestone terrains of the southern Appalachians, subterranean networks of solution cavities and fissures present circulatory systems facilitating convective and advective transport of radon-bearing gas. Evidence suggests that the primary driving forces for transport are aerostatic pressure differentials created by the difference between the underground and the outside air temperatures. Examples are presented of houses experiencing elevated indoor radon levels as a consequence of communicating with such subsurface transportation systems. The location of a house near the upper or lower end of a subterranean-circulatory system seems to produce amplification of indoor radon levels in winter or summer, respectively. The transport mechanism for radon-bearing air in karst and its impact on indoor radon need better understanding, both in regard to evaluating the geographical prevalence of the phenomenon and the induced spatial and temporal effects that are possible. This paper reports field studies made at houses in karst regions at Oak Ridge, Tennessee, and Huntsville, Alabama. A primary radon-transport mechanism is advocated of ascending or descending subsurface columns of air whose flows are largely driven by aerostatic pressure gradients created by the inground-outdoor air temperature differentials. 5 refs., 5 figs., 1 tab

  4. Interaction and penetration of heated UO2 with limestone concrete

    International Nuclear Information System (INIS)

    Farhadieh, R.; Pedersen, D.R.; Purviance, R.; Carlson, N.

    1982-01-01

    To safeguard the environment against radiological releases, the major question of concern in PAHR safety assessment, following an HCDA, involves confinement and dilution of the molten core-debris. Significant to the study is the directional growth of the core-debris in the concrete foundation of the reactor building or the concrete below the reactor cavity. The real material experiments were carried out in the test apparatus shown. Casts of CRBRP limestone concrete were prepared in graphite cylinders, each having an internal diameter of 8.9 cm and a depth of 30.5 cm. The 17.8-cm-deep concrete samples were allowed to cure for at least 28 days. Experiments were conducted within two months of curing time. The cavity above concrete was packed with 3 kg of pure UO 2 particles (1 to 3 mm). A uranothermic mixture was placed on the top of UO 2 powder. Heating and possible melting of UO 2 was achieved resistively after the ignition of the thermite. Total experimental time was about 60 minutes, during which time a maximum electrical power input of 1.8 watts/gr was applied to the UO 2 . Three gas samples were taken at temperatures of 100, 600, and 950 0 C, measured in the plane of the No. 2 thermocouple. Selection of three temperatures were to study the amount and the type of gases released from different phases of concrete

  5. Ship emissions and air pollution in Denmark

    DEFF Research Database (Denmark)

    Olesen, Helge Rørdam; Winther, Morten; Ellermann, Thomas

    A project has been carried out to map the contribution from ship traffic to air pollution in Denmark. A main element in the project is the establishment of a new, improved inventory of ship emissions for the waters around Denmark. The inventory makes use of the so-called AIS system, which...... continuously keeps track of ship positions. The inventory provides basis for model calculations of air quality in Denmark for the years 2007, 2011 and 2020. The study has focus on identifying the contribution from ships, and on assessing the effect of international regulations of ship pollution. A minor...... component of the study concerns the contribution to local air pollution from ships at port....

  6. Outcome of breast cancer screening in Denmark

    DEFF Research Database (Denmark)

    Lynge, Elsebeth; Bak, Martin; von Euler-Chelpin, My

    2017-01-01

    were node negative and 40% ≤10 mm. False-positive rate was around 2%; higher for North Denmark Region than for the rest of Denmark. Three out of 10 breast cancers in screened women were diagnosed as interval cancers. Conclusions: High coverage by examination and low interval cancer rate are required...... for screening to decrease breast cancer mortality. Two pioneer local screening programs starting in the 1990s were followed by a decrease in breast cancer mortality of 22-25%. Coverage by examination and interval cancer rate of the national program were on the favorable side of values from the pioneer programs...... calculated coverage by examination; participation after invitation; detection-, interval cancer- and false-positive rates; cancer characteristics; sensitivity and specificity, for Denmark and for the five regions. Results: At the national level coverage by examination remained at 75-77%; lower in the Capital...

  7. Introduction of New Parasites in Denmark

    DEFF Research Database (Denmark)

    Enemark, Heidi L.

    examples of such parasites/parasitic diseases: Setaria tundra, a mosquito-borne filarioid nematode which was detected for the first time in Danish deer in 2010. This parasite is usually considered harmless but is capable of causing peritonitis and mortality in ungulates. The newly detected parasite...... was genetically very similar to previously published isolates from France and Italy, and may have been spread to Denmark from southern Europe. Giardia spp. a zoonotic, unicellular parasite (protozoa) well known in Danish livestock but recently found in extremely high numbers in Danish deer with chronic diarrhea...... for the first time in Denmark approximately 10 years ago in 3 foxes from the Copenhagen area. Since then, no systematic surveillance has been performed, and therefore the current prevalence among wildlife and pets is unknown. So far the parasite has not been found in intermediate hosts (rodents) in Denmark...

  8. The Market for Hospital Medicine in Denmark

    DEFF Research Database (Denmark)

    Hostenkamp, Gisela

    2012-01-01

    Pharmaceutical expenditure growth has outpaced GDP and healthcare expenditure growth rates in Denmark as in most OECD countries for the last decade. A major part of this increase was due to high growth rates in specialist areas that are typically located in hospital settings. Yet the market...... for hospital medicines and their procurement are still poorly understood. The present paper characterises the market for hospital medicines in Denmark in terms of its organisation and developments between 2005 and 2009. In Denmark hospital medicines are publicly financed and procurement is centrally organised....... 98% of all medicines administered at Danish public hospitals are purchased through a public procurement agency by means of public tenders. Using data on actual contract prices we decompose pharmaceutical expenditure growth into the contributions from newly introduced medicines, price and volume...

  9. Mobility and language change in Denmark

    DEFF Research Database (Denmark)

    Monka, Malene

    featured substantial amounts of dialect features (Kristensen 1980; Pedersen 1986). In 2005 to 2010, researchers at the Danish National Research Center for Language Change in Real Time (LANCHART) and the University of Southern Denmark re-interviewed informants, thus providing data for investigating language......Mobility and language change in Denmark This paper demonstrates how mobility affects language change in real time and reports on the results of my PhD-thesis. In the thesis I made a real time panel study in three towns in distinct dialect areas in Denmark and examined language change in 23 speakers...... recorded in 1978 to 2010. The results emphasize the advantages of approaching mobility from different angles when investigating patterns of language change. The present paper focuses on six geographically and socially mobile informants. At the time of the early recordings, the three towns were in different...

  10. Skill-Biased Technological Change in Denmark

    DEFF Research Database (Denmark)

    Malchow-Møller, Nikolaj; Rose Skaksen, Jan

    2003-01-01

    Skill-Biased Technological Change in Denmark:A Disaggregate Perspective@*In this paper, we provide an industry-level analysis of skill-biased technological change(SBTC) in Denmark over the last two decades. The analysis shows that SBTC has variedconsiderably across industries, and traditionally...... large Danish industries have experiencedrelatively less SBTC. This may partly explain why wage inequality between skilled and lessskilled has risen less in Denmark than in other countries. We also find that SBTC has beenconcentrated in already skill-intensive industries. This contains important...... information aboutfuture labour requirements, as the relative importance of these industries must be expectedto grow, thereby reinforcing the shift in demand for skilled labour.JEL Classification: J24, J31, L6Keywords: skill-biased technological change, Danish industries...

  11. Environmental economy account for Denmark 2004

    International Nuclear Information System (INIS)

    Anon.

    2006-01-01

    The environmental economy account for Denmark shows that the contribution to acidification in Denmark decreased with 5,2% from 2003 to 2004, while the contribution to the greenhouse effect decreased with 4,4%. The reserves of petroleum and natural gas increased in 2004 with 14 b.DKK to 232 b.DKK. The environmental account for Denmark presents accounts of the energy consumption (and water consumption) of the industrial branches and the households together with their emission of pollutants to the atmosphere. The account also contains information about the environmental taxes and subsidies that rest with industry and households. Finally, volume and value are presented of the oil and gas reserves in the North Sea. The environmental account combines environmental data with the Danish National Accounts, making it possible to analyse the relation between economy and environment. (ln)

  12. Performance contracting in central government in Denmark

    DEFF Research Database (Denmark)

    Kristiansen, Mads Bøge

    2015-01-01

    ) are observed across central government agencies, when the content of the performance contracts is compared. This makes it interesting to examine how variation in the content of the performance contracts across agencies can be explained? Based on a broad theoretical framework in which variation......This paper looks into performance contracting in Danish central government. Management by Objectives and Results (MBOR) was adopted in central government in Denmark during the 1980s and early 1990s. In 1991, performance contracts between parent ministries and their agencies were introduced...... in Danish central government. Since their introduction, performance contracts have become central elements in the steering and management of agencies in central government in Denmark, and today they are nearly universally adopted in central government. In Denmark, the Ministry of Finance is responsible...

  13. Hydration study of limestone blended cement in the presence of hazardous wastes containing Cr(VI)

    International Nuclear Information System (INIS)

    Trezza, M.A.; Ferraiuelo, M.F.

    2003-01-01

    Considering the increasing use of limestone cement manufacture, the present paper tends to characterize limestone behavior in the presence of Cr(VI). The research reported herein provides information regarding the effect of Cr(VI) from industrial wastes in the limestone cement hydration. The cementitious materials were ordinary Portland cement, as reference, and limestone blended cement. The hydration and physicomechanical properties of cementitious materials and the influence of chromium at an early age were studied with X-ray diffraction (XRD), infrared spectroscopy (FTIR), conductimetric and mechanical tests. Portland cement pastes with the addition of Cr(VI) were examined and leaching behavior with respect to water and acid solution were investigated. This study indicates that Cr(VI) modifies the rate and the components obtained during the cement hydration

  14. Limestones in Treinta y Tres district : Aerial photo of Jose P. Varela - Isla Patrulla

    International Nuclear Information System (INIS)

    Coronel, N.; Heinzen, W.

    1981-01-01

    This work brings information of fields and laboratory samples about the outcrop in Treinta y Tres district in the framework of limestones programme carried out jointly with I.G.U and BGR through the geological German mission

  15. Coated limestone as a filler for the production of PVC-products

    Directory of Open Access Journals (Sweden)

    Mihajlović Slavica

    2005-01-01

    Full Text Available The results of laboratory investigations of the possibility to obtain coated limestone for the production of PVC-products are presented in this paper. Limestone from the "Venčac" deposit (Aranđelovac, Serbia and Montenegro was used as the raw material. The investigations were carried out in two phases: obtaining the coated limestone and determination of the degree of coating. The results of the investigations showed that successful coating of the surface of the limestone particles with Ca-stearate (Ca-stearate content 3% was achieved in a vibro mill with rings and the obtained degree of coating was higher than 95%. The coating degree was determined in transmitted light by a polarization microscope applying the immersion method (water immersion.

  16. Systematic ichnology of microborings from the Cenozoic White Limestone Group, Jamaica, West Indies

    NARCIS (Netherlands)

    Blissett, D.J.; Pickerill, R.K.

    2007-01-01

    The Middle Eocene to Middle Miocene White Limestone Group of Jamaica contains a common and diverse, poorly to well-preserved microboring ichnofauna, namely Centrichnus eccentricus Bromley & Martinell, Curvichnus pediformis isp. nov., Dendrorete balani Tavernier, Campbell & Golubic, Dipatulichnus

  17. Improving DMS 9210 requirements for limestone rock asphalt : year one interim report.

    Science.gov (United States)

    2013-05-01

    Limestone Rock Asphalt (LRA) mixtures have been produced and placed for several decades using specification requirements currently listed under DMS 9210. Several Districts have had placement issues and premature failures at the beginning of 2010. The...

  18. Dolomitization in the diagenetic history of the Štramberg limestones

    Czech Academy of Sciences Publication Activity Database

    Lintnerová, O.; Knietl, M.; Reháková, D.; Skupien, P.; Vašíček, Zdeněk

    2008-01-01

    Roč. 34, 3/1 (2008), s. 191-192 ISSN 0138-0974 Institutional research plan: CEZ:AV0Z30860518 Keywords : Štramberk Limestone * dolomitization * dedolomitization Subject RIV: DB - Geology ; Mineralogy

  19. Denmark's net'zero energy home'

    DEFF Research Database (Denmark)

    Hansen, Ellen Kathrine

    2010-01-01

    Judging by looks alone, you'd never guess that the simple one-and-a-half-story house on a residential street outside Århus, Denmark, is anything more than an ordinary single-family home. The stylish little house has the broad windows and long sloping roof of a typical Scandinavian home; a trampol......Judging by looks alone, you'd never guess that the simple one-and-a-half-story house on a residential street outside Århus, Denmark, is anything more than an ordinary single-family home. The stylish little house has the broad windows and long sloping roof of a typical Scandinavian home...

  20. Copenhagen is hot, Denmark is not

    DEFF Research Database (Denmark)

    Csaba, Fabian; Stöber, Birgit

    This paper discusses the practice of ranking linked to the issue of place branding focusing on two cases from Denmark, one the national level, the other on the local level, namely the city of Copenhagen. Rankings of places have increased, and – as we shall argue – so have their influence on ident......This paper discusses the practice of ranking linked to the issue of place branding focusing on two cases from Denmark, one the national level, the other on the local level, namely the city of Copenhagen. Rankings of places have increased, and – as we shall argue – so have their influence...... audiences represent and use place image survey results....

  1. Implementation of Renewable Energy Systems in Denmark

    DEFF Research Database (Denmark)

    Meyer, Niels I

    1997-01-01

    Denmark has been one of the first countries in the world to commit itself to a sustainable energy development. This has been substantiated by two official action plans from 1990 and 1996 with emphasis on energy efficiency and supply systems based on renewable energy. In year 2005, renewable energy...... sources are planned to cover 12-14% and in year 2030 about 35% of total Danish energy demand. This paper reviews the experiences with implementation of renewable energy in Denmark with a focus on wind power and biomass....

  2. Male and Female Labour Supply in Denmark

    DEFF Research Database (Denmark)

    Graversen, Ebbe Krogh

    1996-01-01

    This paper estimates labour supply for married and single men and women in Denmark in 1990, using a double-hurdle model which allows involuntary unemployment due to for example demand restrictions, and fixed costs of work. A labour supply f unction based on a variant of the Stone-Geary utility...... function with a nonlinear wage rate is estimated. Elasticities of labour supply with respect to wage, income and tax rate are presented. Finally, the effects on the four groups of a few recently discussed tax and transfer reforms in Denmark are simulated....

  3. The Nordic countries and China - Denmark

    DEFF Research Database (Denmark)

    Jakobsen, Uffe

    2018-01-01

    Usually, Denmark is considered a ‘small state’ and China as one of world’s leading powers, however, Denmark and China have a ‘comprehensive strategic partnership’ signed by the two states in 2008. In this section we will account for this extraordinary relationship by briefly analysing the history...... of Danish-Chinese relations, the ups and downs during the Cold War and after the end of the Cold War, the development leading to the partnership agreement and the current situation....

  4. Comparison of future energy scenarios for Denmark

    DEFF Research Database (Denmark)

    Kwon, Pil Seok; Østergaard, Poul Alberg

    2012-01-01

    Scenario-making is becoming an important tool in energy policy making and energy systems analyses. This article probes into the making of scenarios for Denmark by presenting a comparison of three future scenarios which narrate 100% renewable energy system for Denmark in 2050; IDA 2050, Climate...... Commission 2050, and CEESA (Coherent Energy and Environmental System Analysis). Generally, although with minor differences, the scenarios suggest the same technological solutions for the future such as expansion of biomass usage and wind power capacity, integration of transport sector into the other energy...

  5. Trends in sickness absence in Denmark

    DEFF Research Database (Denmark)

    Johansen, Kristina; Bihrmann, Kristine; Mikkelsen, Sigurd

    2009-01-01

    's Authority, and the Labor Force Survey indicated a stable and largely unaltered pattern of sickness absence during the last 20 years. Findings from Statistics Denmark showed an increase in the cumulative incidence proportion from 6.6 to 7.5% among employed people between 2000 and 2007. CONCLUSION: Our data...... a linear regression analysis to analyze time trends in sickness absence based on datasets from the Danish Employers Confederation, the State Employer's Authority, the Labour Force Survey, and Statistics Denmark. RESULTS: The findings from the Confederation of Danish Employers, the State Employer...

  6. Maternal mortality in Denmark, 1985-1994

    DEFF Research Database (Denmark)

    Andersen, Betina Ristorp; Westergaard, Hanne Brix; Bødker, Birgit

    2008-01-01

    fortuitous causes. Hypertensive disorders of pregnancy were the major cause of direct maternal deaths. The rate of maternal deaths constituted 9.8/100,000 maternities (i.e. the number of women delivering registrable live births at any gestation or stillbirths at 24 weeks of gestation or later). CONCLUSION......: This is the first systematic report on deaths in Denmark based on data from national registries. The maternal mortality rate in Denmark is comparable to the rates in other developed countries. Fortunately, statistics are low, but each case represents potential learning. Obstetric care has changed and classification...

  7. Surviving severe traumatic brain injury in Denmark

    DEFF Research Database (Denmark)

    Odgaard, Lene; Poulsen, Ingrid; Kammersgaard, Lars Peter

    2015-01-01

    PURPOSE: To identify all hospitalized patients surviving severe traumatic brain injury (TBI) in Denmark and to compare these patients to TBI patients admitted to highly specialized rehabilitation (HS-rehabilitation). PATIENTS AND METHODS: Patients surviving severe TBI were identified from...... severe TBI were admitted to HS-rehabilitation. Female sex, older age, and non-working status pre-injury were independent predictors of no HS-rehabilitation among patients surviving severe TBI. CONCLUSION: The incidence rate of hospitalized patients surviving severe TBI was stable in Denmark...

  8. Epidemiology of autoimmune diseases in Denmark

    DEFF Research Database (Denmark)

    Eaton, William W.; Rose, N.R.; Kalaydijan, A.

    2007-01-01

    An epidemiologic study of the autoimmune diseases taken together has not been done heretofore. The National Patient Register of Denmark is used to estimate the population prevalence of 31 possible or probable autoimmune diseases. Record linkage is used to estimate 465 pairwise co-morbidities in i......An epidemiologic study of the autoimmune diseases taken together has not been done heretofore. The National Patient Register of Denmark is used to estimate the population prevalence of 31 possible or probable autoimmune diseases. Record linkage is used to estimate 465 pairwise co...

  9. Assessing the effectiveness of Denmark's waste tax

    DEFF Research Database (Denmark)

    Andersen, Mikael Skou

    1998-01-01

    By the mid-l980s, Denmark had a serious waste disposal problem: Its per capita generation of waste was among the highest in Europe and rising; it was running out of landfill space, with Copenhagen set to exhaust its landfill capacity in a short time; and there was a great deal of concern about air...... pollution from incinerators. Denmark responded to this situation by adopting a comprehensive waste management policy that included an innovative tax on waste designed to promote the reuse and recycling of many types of waste. Now that the tax has been in place for a decade, there is enough data to assess...

  10. Offshore investments: Denmark shows the way

    International Nuclear Information System (INIS)

    Anon.

    1998-01-01

    This article presents an overview of the use of wind power in Denmark and discusses the tremendous growth in the manufacture of wind turbines since 1981 with Denmark holding some 60% of the worlds' wind turbine market. The move to offshore wind farms is explained in terms of the shortage of land and the quality of the offshore wind, and details of the Tuno Knob pilot offshore wind farm are given. Offshore wind power in Europe, the challenges to offshore operations, the costs involved, environmental effects of the use of offshore wind, and the growing amount of wind power capacity are discussed

  11. Management Accounting in Denmark; Theory and Practice

    DEFF Research Database (Denmark)

    Israelsen, Poul; Andersen, Michael; Rohde, Carsten

    1996-01-01

    The article describes the present state of cost and management accounting in Denmark within “mainstream accounting”, both as regards theory and practice. In the case of theory, there has been a gradual convergence of views. The essence of these views is briefly described. Concerning practice......, the main results of two new empirical studies are presented one on product costing and the other on identifying the adoption of “modern cost management techniques” in Denmark. The article places both current theory and practice in their historical context. In the former, this is done through an outline...

  12. Deterioration of limestone aggregate mortars by liquid sodium in fast breeder reactor environment

    Energy Technology Data Exchange (ETDEWEB)

    Mohammed Haneefa, K., E-mail: mhkolakkadan@gmail.com [Department of Civil Engineering, IIT Madras, Chennai (India); Santhanam, Manu [Department of Civil Engineering, IIT Madras, Chennai (India); Parida, F.C. [Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam (India)

    2014-08-15

    Highlights: • Limestone mortars were exposed to liquid sodium exposure at 550 °C. • Micro-analytical techniques were used to characterize the exposed specimens. • The performance of limestone mortar was greatly influenced by w/c. • The fundamental degradation mechanisms of limestone mortars were identified. - Abstract: Hot liquid sodium at 550 °C can interact with concrete in the scenario of an accidental spillage of sodium in liquid metal cooled fast breeder reactors. To protect the structural concrete from thermo-chemical degradation, a sacrificial layer of limestone aggregate concrete is provided over it. This study investigates the fundamental mechanisms of thermo-chemical interaction between the hot liquid sodium and limestone mortars at 550 °C for a duration of 30 min in open air. The investigation involves four different types of cement with variation of water-to-cement ratios (w/c) from 0.4 to 0.6. Comprehensive analysis of experimental results reveals that the degree of damage experienced by limestone mortars displayed an upward trend with increase in w/c ratios for a given type of cement. Performance of fly ash based Portland pozzolana cement was superior to other types of cements for a w/c of 0.55. The fundamental degradation mechanisms of limestone mortars during hot liquid sodium interactions include alterations in cement paste phase, formation of sodium compounds from the interaction between solid phases of cement paste and aggregate, modifications of interfacial transition zone (ITZ), decomposition of CaCO{sub 3}, widening and etching of rhombohedral cleavages, and subsequent breaking through the weakest rhombohedral cleavage planes of calcite, staining, ferric oxidation in grain boundaries and disintegration of impurity minerals in limestone.

  13. Deterioration of limestone aggregate mortars by liquid sodium in fast breeder reactor environment

    International Nuclear Information System (INIS)

    Mohammed Haneefa, K.; Santhanam, Manu; Parida, F.C.

    2014-01-01

    Highlights: • Limestone mortars were exposed to liquid sodium exposure at 550 °C. • Micro-analytical techniques were used to characterize the exposed specimens. • The performance of limestone mortar was greatly influenced by w/c. • The fundamental degradation mechanisms of limestone mortars were identified. - Abstract: Hot liquid sodium at 550 °C can interact with concrete in the scenario of an accidental spillage of sodium in liquid metal cooled fast breeder reactors. To protect the structural concrete from thermo-chemical degradation, a sacrificial layer of limestone aggregate concrete is provided over it. This study investigates the fundamental mechanisms of thermo-chemical interaction between the hot liquid sodium and limestone mortars at 550 °C for a duration of 30 min in open air. The investigation involves four different types of cement with variation of water-to-cement ratios (w/c) from 0.4 to 0.6. Comprehensive analysis of experimental results reveals that the degree of damage experienced by limestone mortars displayed an upward trend with increase in w/c ratios for a given type of cement. Performance of fly ash based Portland pozzolana cement was superior to other types of cements for a w/c of 0.55. The fundamental degradation mechanisms of limestone mortars during hot liquid sodium interactions include alterations in cement paste phase, formation of sodium compounds from the interaction between solid phases of cement paste and aggregate, modifications of interfacial transition zone (ITZ), decomposition of CaCO 3 , widening and etching of rhombohedral cleavages, and subsequent breaking through the weakest rhombohedral cleavage planes of calcite, staining, ferric oxidation in grain boundaries and disintegration of impurity minerals in limestone

  14. Resedimented Limestones in Middle and Upper Jurassic Succession of the Slovenian Basin

    Directory of Open Access Journals (Sweden)

    Boštjan Rožič

    2006-12-01

    Full Text Available The Middle and Upper Jurassic succession of the Slovenian Basin is characterized by pelagic sedimentation of siliceous limestones and radiolarian cherts. In the southern and central part of the basin two packages of resedimented limestones are interbedded within pelagic sediments. The Lower resedimented limestones are lower-middle Bajocian to lower Callovian in age. In the southern part of the basin they form laterally discontinuous sequences composed of limestone breccias, calcarenites and micritic limestone and in the central part of the basin calcarenite intercalations within pelagic beds. They were transported by turbidity currents from highly productive ooidal shoals of the Dinaric Carbonate Platform. The Lower resedimented carbonates correlate with the lower three members of the Travnik Formation in the Bovec Trough and similarly developed but much thicker Vajont Formation in the Belluno Basin. The difference in thickness is interpreted as a consequence of shallow-water and longshore currents on the Dinaric Carbonate Platform that transported platform material towards southwest in the direction of the Belluno Basin. The Upper resedimented limestones are upper Kimmeridgian to lower Tithonian and occur within radiolarian cherts in the upper part of the succession as calcarenite beds that originated by turbidity currents. Onset of resedimentation coincides with the emersion-related demise of barrier reef and following deposition of micritic and rare oolitic limestones on the Dinaric Carbonate Platform. Approximatelly coeval resedimented limestones occur in the fourth member of the Travnik Formation in the Bovec Trough, but are not reported from the Ammonitico Rosso Superiore Formation in the Belluno Basin.

  15. Volume change of limestone and its effects on drying shrinkage of concrete

    OpenAIRE

    YAGI, Shogo; AQUINO, Carlos; INOUE, Masumi; OKAMOTO, Takahisa

    2010-01-01

    Recently, the cracks of concrete by drying shrinkage become one of the problems in the construction industry in Japan. The drying shrinkage decreases when the concrete is produced with limestone aggregate. However, it is not clear why the drying shrinkage is decreased. The purpose of this study is to clarify the relation between the drying shrinkage of concrete and the limestone aggregate. In this study, the experiments about the strength, elasticity and drying shrinkage of concrete and the p...

  16. CARBONIFEROUS CORALS AND CHAETETIDS FROM EXOTIC LIMESTONE BLOCK OF THE CRIMEA

    OpenAIRE

    OGAR, VICTOR; KLEVTSOVSKYI, ANDREY

    2015-01-01

    A chaetetid sponge and coral fauna from a Carboniferous exotic limestone block in the Lower Jurassic Esciorda olistostrome on the Bodrak River (Crimean Mountains) are described for the first time. The Bodrak exotic block is composed of massive limestone. It contains the chaetetid Chaetetes (Boswellia) sp., the tabulate coral Multithecopora sp., and poorly preserved rugose corals, including Dibunophyllum? sp., Cordibia? sp. and gen. et sp. indet. Only the fasciculate colonies of the rugose cor...

  17. Mortality among anesthesiologists in Denmark, 1973-95

    DEFF Research Database (Denmark)

    Juel, K; Husum, Bent; Viby-Mogensen, J

    2002-01-01

    Preliminary data from Sweden indicating that anesthesiologists have a high mortality risk has caused a lot of concern in Denmark. The aim of this study therefore was to compare mortality between consultant anesthesiologists and other consultants in Denmark.......Preliminary data from Sweden indicating that anesthesiologists have a high mortality risk has caused a lot of concern in Denmark. The aim of this study therefore was to compare mortality between consultant anesthesiologists and other consultants in Denmark....

  18. Enhancement of direct sulfation of limestone by Na{sub 2}CO{sub 3} addition

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Chuanmin [School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, Hebei Province (China); Zhuang, Ye [Energy and Environmental Research Center, University of North Dakota, 15 North 23rd Street, Grand Forks, ND 58203 (United States); Wang, Chunbo [Department of Power engineering, North China Electric Power University, Baoding 071003, Hebei Province (China)

    2009-07-15

    For an oxy-fuel circulating fluidized bed combustion system, the limestone calcination is normally prevented due to excessive CO{sub 2} partial pressures and the limestone is subject to a direct sulfation reaction. The enhancement of the direct sulfation of limestone by Na{sub 2}CO{sub 3} was investigated under high CO{sub 2} partial pressure in a thermogravimetric apparatus (TGA) and scanning electron microscope (SEM) analysis method. A commercial limestone with a mean size of 18.8 {mu}m was used. Experimental results indicate that the incorporation of Na{sup +} ions in solid product CaSO{sub 4} lattice structures results in formation of more extrinsic point defects in the crystal lattices of CaSO{sub 4} and a significantly increased solid-state diffusivity/mobility in the solid product. So the direct sulfation of Na{sub 2}CO{sub 3}-doped limestone shows higher rate and higher degree of conversion in the later stage of sulfation, in comparison with the direct sulfation of original limestone. The reaction changes from diffusional control to chemical reaction control in the presence of Na{sub 2}CO{sub 3} because of the effect of foreign ions on accelerating the solid-state diffusion. (author)

  19. Enhancement of direct sulfation of limestone by Na{sub 2}CO{sub 3} addition

    Energy Technology Data Exchange (ETDEWEB)

    Chuanmin Chen; Ye Zhuang; Chunbo Wang [North China Electric Power University, Baoding (China). School of Environmental Science & Engineering

    2009-07-15

    For an oxy-fuel circulating fluidized bed combustion system, the limestone calcination is normally prevented due to excessive CO{sub 2} partial pressures and the limestone is subject to a direct sulfation reaction. The enhancement of the direct sulfation of limestone by Na{sub 2}CO{sub 3} was investigated under high CO{sub 2} partial pressure in a thermogravimetric apparatus (TGA) and scanning electron microscope (SEM) analysis method. A commercial limestone with a mean size of 18.8 {mu}m was used. Experimental results indicate that the incorporation of Na{sup +} ions in solid product CaSO{sub 4} lattice structures results in formation of more extrinsic point defects in the crystal lattices of CaSO{sub 4} and a significantly increased solid-state diffusivity/mobility in the solid product. So the direct sulfation of Na{sub 2}CO{sub 3}-doped limestone shows higher rate and higher degree of conversion in the later stage of sulfation, in comparison with the direct sulfation of original limestone. The reaction changes from diffusional control to chemical reaction control in the presence of Na{sub 2}CO{sub 3} because of the effect of foreign ions on accelerating the solid-state diffusion. 33 refs., 7 figs., 2 tabs.

  20. Direct sulfation of limestone based on oxy-fuel combustion technology

    Energy Technology Data Exchange (ETDEWEB)

    Chen, C.M.; Zhao, C.S.; Liu, S.T.; Wang, C.B. [North China Electric Power University, Baoding (China)

    2009-10-15

    With limestone as the sorbent, the sulfation reaction can proceed via two different routes depending on whether calcination of the limestone takes place under the given reaction conditions. The direct sulfation reaction is defined as the sulfation reaction between sulfur dioxide (SO{sub 2}) and limestone in an uncalcined state. This reaction, based on oxyfuel combustion technology, was studied by thermogravimetric analysis. Surface morphologies of the limestone particles after sulfation were examined by a scanning electron microscope. Results show that there are more pores or gaps in the product layer formed by direct sulfation of limestone than by indirect sulfation, which can be attributed to the generation of carbon dioxide (CO{sub 2}) at a reaction interface. Compared with indirect sulfation, direct sulfation of limestone can yield much higher conversion and has a much higher reaction rate. For direct sulfation, the greater porosity in the product layer greatly reduces the solid-state ion diffusion distance, resulting in a higher reaction rate and higher conversion.

  1. Interpretation of well hydrographs in the karstic Maynardville Limestone at the Oak Ridge Y-12 Plant

    International Nuclear Information System (INIS)

    Shevenell, L.A.; McMaster, B.W.

    1996-06-01

    The Maynardville Limestone in Oak Ridge, Tennessee underlies the southern portion of Bear Creek Valley (BCV), and is considered to be the primary pathway for groundwater leaving the Y-12 Plant boundaries. Sixty-seven percent of all wells drilled into the Maynardville Limestone have intersected at least one cavity, suggesting karst features may be encountered throughout the shallow (< 200 ft) portions of the Limestone. Because waste facilities at the Y-12 Plant are located adjacent to the Maynardville Limestone, contaminants could enter the karst aquifer and be transported in the conduit system. As part of an overall hydrologic characterization effort of this karst aquifer, 41 wells in the Maynardville Limestone were instrumented with pressure transducers to monitor water level changes (hydrographs) associated with rain events. Wells at depths between approximately 20 and 750 ft were monitored over the course of at least two storms in order that variations with depth could be identified. The wells selected were not exclusively completed in cavities but were selected to include the broad range of hydrologic conditions present in the Maynardville Limestone. Cavities, fractures and diffuse flow zones were measured at a variety of depths. The water level data from the storms are used to identify areas of quickflow versus slower flowing water zones. The data are also used to estimate specific yields and continuum transmissitives in different portions of the aquifer

  2. Studies on limestone concrete as a low-activation structural material for nuclear power plants

    International Nuclear Information System (INIS)

    Uematsu, Mikio; Nagano, Hiroshi; Naito, Yasuhiro

    2000-01-01

    Because of low content of Li, Co and Eu, the target nuclides of activation reaction, limestone concrete is considered to be effective in reducing the decommissioning cost of nuclear plants. Induced activity calculation and structural strength test were performed for limestone concrete and the results were compared with the data obtained for sandstone concrete, which is generally used in nuclear plants. Minor elements, which are important from the viewpoint of activation, were measured with elementary analysis for limestone samples from three different quarries in Japan. Induced activity in biological shield walls (BSW) of Boiling Water Reactor (BWR) plants was calculated with the isotope generation code ORIGEN-79 using neutron flux data obtained with the one-dimensional Sn transport code ANISN and MGCL 137-group activation cross section library based on JENDL-3. Estimated total radioactivity accumulated in limestone concrete BSW was 5 times lower than that in the sandstone concrete BSW. Structural strength were compared between limestone concrete and sandstone concrete, and limestone concrete was found to have enough compressive strength and tensile strength. (author)

  3. Accelerated weathering of limestone for CO2 mitigation opportunities for the stone and cement industries

    Science.gov (United States)

    Langer, W.H.; Juan, C.A.S.; Rau, G.H.; Caldeira, K.

    2009-01-01

    Large amounts of limestone fines coproduced during the processing of crushed limestone may be useful in the sequestration of carbon dioxide (CO 2). Accelerated weathering of limestone (AWL) is proposed as a low-tech method to capture and sequester CO2 from fossil fuel-fired power plants and other point-sources such as cement manufacturing. AWL reactants are readily available, inexpensive, and environmentally benign. Waste CO 2 is hydrated with water to produce carbonic acid, which then reacts with and is neutralized by limestone fines, thus converting CO2 gas to dissolved calcium bicarbonate. AWL waste products can be disposed of in the ocean. Feasibility requires access to an inexpensive source of limestone and to seawater, thus limiting AWL facilities within about 10 km of the coastline. The majority of U.S. coastal power generating facilities are within economical transport distance of limestone resources. AWL presents opportunities for collaborative efforts among the crushed stone industry, electrical utilities, cement manufactures, and research scientists.

  4. Influence of limestone waste as partial replacement material for sand and marble powder in concrete properties

    Directory of Open Access Journals (Sweden)

    Omar M. Omar

    2012-12-01

    Full Text Available Green concrete are generally composed of recycling materials as hundred or partial percent substitutes for aggregate, cement, and admixture in concrete. Limestone waste is obtained as a by-product during the production of aggregates through the crushing process of rocks in rubble crusher units. Using quarry waste as a substitute of sand in construction materials would resolve the environmental problems caused by the large-scale depletion of the natural sources of river and mining sands. This paper reports the experimental study undertaken to investigate the influence of partial replacement of sand with limestone waste (LSW, with marble powder (M.P as an additive on the concrete properties. The replacement proportion of sand with limestone waste, 25%, 50%, and 75% were practiced in the concrete mixes except in the concrete mix. Besides, proportions of 5%, 10% and 15% marble powder were practiced in the concrete mixes. The effects of limestone waste as fine aggregate on several fresh and hardened properties of the concretes were investigated. The investigation included testing of compressive strength, indirect tensile strength, flexural strength, modulus of elasticity, and permeability. It was found that limestone waste as fine aggregate enhanced the slump test of the fresh concretes. But the unit weight concretes were not affected. However, the good performance was observed when limestone waste as fine aggregate was used in presence of marble powder.

  5. Environmentally acceptable effect of hydrogen peroxide on cave 'lamp-flora', calcite speleothems and limestones

    International Nuclear Information System (INIS)

    Faimon, Jiri; Stelcl, Jindrich; Kubesova, Svatava; Zimak, Jiri

    2003-01-01

    Hydrogen peroxide plus limestone fragments allows removal of organisms without corrosion of limestone and speleothem. - Mosses, algae, and cyanobacteria (lamp-flora) colonize illuminated areas in show caves. This biota is commonly removed by a sodium hypochlorite solution. Because chlorine and other deleterious compounds are released into a cave environment during lamp-flora cleansing, hydrogen peroxide was tested as an alternative agent. In a multidisciplinary study conducted in the Katerinska Cave (Moravian Karst, Czech Republic), 12 algae- and cyanobacteria taxons and 19 moss taxons were detected. The threshold hydrogen peroxide concentration for the destruction of this lamp-flora was found to be 15 vol.%. Based on laboratory experiments in stirred batch reactors, the dissolution rates of limestones and calcite speleothems in water were determined as 3.77x10 -3 and 1.81x10 -3 mol m -2 h -1 , respectively. In the 15% peroxide solution, the limestone and speleothem dissolution rates were one order of magnitude higher, 2.00x10 -2 and 2.21x10 -2 mol m -2 h -1 , respectively. So, the peroxide solution was recognised to attack carbonates somewhat more aggressively than karst water. In order to prevent the potential corrosion of limestone and speleothems, the reaching of preliminary peroxide saturation with respect to calcite is recommended, for example, by adding of few limestone fragments into the solution at least 10 h prior to its application

  6. Mangrove plantation over a limestone reef - Good for the ecology?

    Science.gov (United States)

    Asaeda, Takashi; Barnuevo, Abner; Sanjaya, Kelum; Fortes, Miguel D.; Kanesaka, Yoshikazu; Wolanski, Eric

    2016-05-01

    There have been efforts to restore degraded tropical and subtropical mangrove forests. While there have been many failures, there have been some successes but these were seldom evaluated to test to what level the created mangrove wetlands reproduce the characteristics of the natural ecosystem and thus what ecosystem services they can deliver. We provide such a detailed assessment for the case of Olango and Banacon Islands in the Philippines where the forest was created over a limestone reef where mangroves did not exist in one island but they covered most of the other island before deforestation in the 1940s and 1950s. The created forest appears to have reached a steady state after 60 years. As is typical of mangrove rehabilitation efforts worldwide, planting was limited to a single Rhizophora species. While a forest has been created, it does not mimic a natural forest. There is a large difference between the natural and planted forests in terms of forest structure and species diversity, and tree density. The high density of planted trees excludes importing other species from nearby natural forests; therefore the planted forest remains mono-specific even after several decades and shows no sign of mimicking the characteristics of a natural forest. The planted forests provided mangrove propagules that invaded nearby natural forests. The planted forest has also changed the substratum from sandy to muddy. The outline of the crown of the planted forest has become smooth and horizontal, contrary to that of a natural forest, and this changes the local landscape. Thus we recommend that future mangrove restoration schemes should modify their methodology in order to plant several species, maintain sufficient space between trees for growth, include the naturally dominant species, and create tidal creeks, in order to reproduce in the rehabilitated areas some of the key ecosystem characteristics of natural mangrove forests.

  7. Vocational Education and Training in Denmark. First Edition.

    Science.gov (United States)

    Nielsen, Soren P.

    This monograph examines vocational education and training (VT) in Denmark. Section 1 presents background information/framework data on the following: Denmark's political and administrative structure; population, employment, and unemployment; and the Danish economy. In section 2, the history of VT in Denmark is traced from before 1870 to the…

  8. Groundwater mapping program in Denmark - Exemplified by a 450 km2 area in Jutland, Denmark

    DEFF Research Database (Denmark)

    Andersen, Theis Raaschou; Thomsen, Peter

    Due to an ambitious groundwater mapping programme in Denmark the consultancy company Ramboll has attained expertise and technologies for surveying, integrated water resources modelling and decision making systems. The groundwater mapping programme was initiated in 1998 when the Danish Government...

  9. Environmental economy account for Denmark 1997

    International Nuclear Information System (INIS)

    Anon.

    1999-01-01

    The article deals with energy consumption, energy reserves and air pollution in relation to the Danish National Account. The statistics are taken from the separate environment account, which is consistent as 'satellite' to the real national account. The environmental account from Denmark is an example of a system of the so-called NAMEA-type (National Accounting Matrix including Environmental Accounts). (EHS)

  10. Environmental economy account for Denmark 1998

    International Nuclear Information System (INIS)

    Anon.

    2000-01-01

    The article deals with energy consumption, energy reserves and air pollution in relation to the Danish National Account. The statistics are taken from the separate environment account, which is consistent as 'satellite' to the real national account. The environmental account from Denmark is an example of a system of the so-called NAMEA-type (National Accounting Matrix including Environmental Accounts). (EHS)

  11. Environmental economy account for Denmark 1999

    International Nuclear Information System (INIS)

    Anon.

    2001-01-01

    The article deals with energy consumption, energy reserves and air pollution in relation to the Danish National Account. The statistics are taken from the separate environment account, which is consistent as 'satellite' to the real national account. The environmental account from Denmark is an example of a system of the so-called NAMEA-type (National Accounting Matrix including Environmental Accounts). (EHS)

  12. Denmark - Chapter in Handbook of Global Bioethics

    DEFF Research Database (Denmark)

    Nielsen, Linda; Faber, Berit A.

    2014-01-01

    This chapter about bioethics in Denmark focuses on specific Danish characteristics. These are the early start of a bioethics debate, legislation and bioethics councils; the independence of the councils and the parliamentarians voting on ethical issues; the introduction and extraordinary importance...... of laymen as a part of the bioethical debate and decisions; and the strong focus on debate and educational tools....

  13. Use of vaginal hysterectomy in Denmark

    DEFF Research Database (Denmark)

    Nielsen, Sidsel Lykke; Daugbjerg, Signe B; Gimbel, Helga

    2011-01-01

    To describe the use of vaginal, abdominal and laparoscopic hysterectomy in Denmark from 1999 to 2008, the influence of national guidelines and the patient and procedure-related characteristics associated with the choice of vaginal hysterectomy. Design. Nationwide register-based cohort study....

  14. Chemical Intolerance among Hairdressers in Denmark

    DEFF Research Database (Denmark)

    Tran, Marie Thi Dao; Elberling, Jesper; Skovbjerg, Sine

    2013-01-01

    To investigate the prevalence and the severity of fragrance-related symptoms among hairdressers in Denmark compared with the Danish general population. Further, to characterize former hairdressers who are severely chemically intolerant to fragranced products in relation to sex, age and health...

  15. Inclusive Women's Organisations in Denmark and Norway?

    DEFF Research Database (Denmark)

    Pristed Nielsen, Helene; Thun, Cecilie

    2010-01-01

    The article demonstrates how majority women’s organizations in Denmark and Norway react differently to the challenge of collaborating with new groups of women in society. The question of collaboration with minority women’s organizations prompts existing majority organizations to navigate between ...

  16. A case of human babesiosis in Denmark

    DEFF Research Database (Denmark)

    Holler, Jon G; Röser, Dennis; Nielsen, Henrik Vedel

    2014-01-01

    We report the first human case of Babesia microti infection imported to Denmark from the United States by a 64 year old female traveller with fever of unknown origin. The case raises the possibility that Babesia-infections may be under-diagnosed, illustrates the importance of a thorough travel hi...

  17. The sale of alcohol in Denmark

    DEFF Research Database (Denmark)

    laCour, Lisbeth; Milhøj, Anders

    2009-01-01

    How do prices affect the choice of types of alcohol in Denmark? We study the Danish sale of alcoholic beverages in a time series framework. First, we look at annual data from 1980 investigating the hypothesis of a fairly stable level of sales. We conclude stationarity of sales and we also find...

  18. Chronic obstructive pulmonary disease in Denmark

    DEFF Research Database (Denmark)

    Lykkegaard, Jesper; Kristensen, Gustav N

    2016-01-01

    BACKGROUND: During the 80s and 90s the mortality and number of hospitalisations due to chronic obstructive pulmonary disease (COPD) in the country of Denmark almost doubled. Since then there has been a plateau. OBJECTIVE: To analyse age, period, and cohort effects on rates of deaths and first...

  19. TU-86. [Denmark]. TU-86; Trafikundersoegelse

    Energy Technology Data Exchange (ETDEWEB)

    1987-03-15

    An investigation of traffic conditions in Denmark limited to ownership of bicycles, autocycles and motorbikes, and to access to, and use of, cars - including car-pooling. The character of road travel in relation to journeys of over 20 km, which are not to and from the place of work, is also examined. (AB).

  20. Considering foreign direct investment in Denmark

    DEFF Research Database (Denmark)

    Gjerding, Allan Næs

    2005-01-01

    The present paper examines the aspect of relational assets and relates it to the strategic decision on undertaking foreign direct investment (FDI). The point of departure is the increasing importance of FDI globally as well as in the Danish economy, and the observation that even though Denmark...

  1. Planning of high school examinations in Denmark

    DEFF Research Database (Denmark)

    Vidal, Rene Victor Valqui; Hansen, Michael Pilegaard

    1995-01-01

    This paper presents a computer based support system used to plan high school examinations in Denmark. We will discuss the methods and techniques used to solve such a complex and large scale combinatorial problem. Decomposition and other heuristic principles have been used extensively to develop...

  2. Addressing food waste reduction in Denmark

    DEFF Research Database (Denmark)

    Halloran, Afton Marina Szasz; Clement, Jesper; Kornum, Niels

    2014-01-01

    , improvements in technology have made it more efficient to utilize food waste for biogas and compost, which improves nutrient cycling through the food system. Major efforts to address food waste in Denmark have mainly been promoted through civil society groups with governmental support, as well as by industry...

  3. INOPS Survey data report for Denmark

    DEFF Research Database (Denmark)

    Lindholst, Andrej Christian; Hansen, Morten Balle; Østergaard, Jeppe

    This data report provides statistics on the organization, management and performance of different ways of providing maintenance services within the municipal park and road sector(s) in Denmark. The statistics rely on data collected in the period from November 2014 to February 2015 through an online...

  4. What Drives Business Performance in Denmark

    DEFF Research Database (Denmark)

    Steiner, Bodo; Wang, Cong

    an overall positive and significant effect of social capital and religion on firm performance in Denmark. These effects are robust to different levels of aggregation (sample structure), different sampling years and alternative measures of firm performance (return on asset, current ratio, solvency ratio...... and profit margin)....

  5. Changing reference intervals for haemoglobin in Denmark

    DEFF Research Database (Denmark)

    Ryberg-Nørholt, Judith; Frederiksen, Henrik; Nybo, Mads

    2017-01-01

    INTRODUCTION: Based on international experiences and altering demography the reference intervals (RI) for haemoglobin (Hb) concentrations in blood were changed in Denmark in 2013 from 113 - 161 g/L to 117 - 153 g/L for women and from 129 - 177 g/L to 134 - 170 g/L for men. The aim of this study w...

  6. Biogas plants in Denmark : successes and setbacks

    NARCIS (Netherlands)

    Raven, R.P.J.M.; Gregersen, K.H.

    2007-01-01

    With 20 centralised plants and over 35 farmscale plants, the digestion of manure and organic waste is a well established technological practice in Denmark. These plants did not emerge without a struggle. Moreover, no new centralised plants have been established since 1998 and the development of

  7. The Seeds of Social Change from Denmark.

    Science.gov (United States)

    Roberson, Donald N., Jr.

    N.F.S. Grundtvig was a priest, historian, poet, and founder of the Danish Folk High School. He believed that education for adults should be geared to adults and wanted schools to be independent of the church. Grundtvig was among the first to call for Denmark's schools to use the native Danish language. Grundtvig believed that each group or culture…

  8. Something Rational in the State of Denmark?

    DEFF Research Database (Denmark)

    Lampe, Markus; Sharp, Paul Richard

    considered Danish trade policy somewhat irrational, that Denmark was right to remain outside. She had little to gain from concluding treaties, since her main trading partners offered free trade for her exports, agricultural goods, and she needed her own tariffs for revenue purposes....

  9. Dioxin in the atmosphere of Denmark

    Energy Technology Data Exchange (ETDEWEB)

    Vikelsoee, J.; Hovmand, M.F.; Andersen, Helle V.; Bossi, R.; Johansen, Elsebeth; Chrillesen, M.A.

    2006-03-15

    Occurrence and geographical distribution of dioxin was investigated in air and deposition at selected locations in Denmark, three forest sites in the background area, a city site in Copenhagen and a village site. At two sites simultaneously determination of dioxins concentrations in the ambient atmosphere and bulk precipitation were carried out during a period of three years. (au)

  10. Discrimination and Anti-discrimination in Denmark

    DEFF Research Database (Denmark)

    Olsen, Tore Vincents

    The purpose of this report is to describe and analyse Danish anti-discrimination legislation and the debate about discrimination in Denmark in order to identify present and future legal challenges. The main focus is the implementation of the EU anti-discrimination directives in Danish law...

  11. The Strategic Electrochemical Research Center in Denmark

    DEFF Research Database (Denmark)

    Mogensen, Mogens Bjerg; Hansen, Karin Vels

    2011-01-01

    A 6-year strategic electrochemistry research center (SERC) in fundamental and applied aspects of electrochemical cells with a main emphasis on solid oxide cells was started in Denmark on January 1st, 2007 in cooperation with other Danish and Swedish Universities. Furthermore, 8 Danish companies...... are presented. ©2011 COPYRIGHT ECS - The Electrochemical Society...

  12. The First "Comfort Houses" in Denmark

    DEFF Research Database (Denmark)

    Brunsgaard, Camilla; Knudstrup, Mary-Ann; Heiselberg, Per

    2009-01-01

    The "Comfort Houses" is the most ambitious building project in passive houses in Denmark until today. Eight single family houses are built and designed by seven different consortiums. Besides fulfilling the German passive house standard the goal was to build the houses according to Danish tradition...

  13. Development of Seasonal Storage in Denmark

    DEFF Research Database (Denmark)

    Heller, Alfred

    2000-01-01

    National survey on seasonal (thermal, large-scale) storage activities in Denmark. A storage programme under the Danish Energy Agency. Programme background, objectives, activities, projects and results.Technologies presented: Pit water storage, gravel water storage with pipe heat exchangers, lining...... materials for pit and lid designs....

  14. Implementing shared decision making in Denmark

    DEFF Research Database (Denmark)

    Dahl Steffensen, Karina; Hjelholt Baker, Vibe; Vinter, Mette Marianne

    2017-01-01

    national plan for cancer treatment. What about tools for patient decision support? Development of evidence-based patient decision aids (PDAs) are still at an early stage in Denmark, but recent national and private funding has helped push the field forward. Furthermore, a few stakeholders have started...

  15. Education of ethnic minority children in Denmark

    DEFF Research Database (Denmark)

    Gitz-Johansen, Thomas; Horst, Christian

    2010-01-01

    This paper explores the dominant approach to education of ethnic minorities in Denmark. Using the concept of hegemony and the political-science distinction between monocultural and multicultural positions as approaches towards a situation of increasing linguistic, ethnic and cultural diversity, t...

  16. Social housing in Portugal and Denmark

    DEFF Research Database (Denmark)

    Alves, Sonia; Andersen, Hans Thor

    The social housing sector has become increasingly residualized and segregated in Portugal and Denmark. Whilst there is a considerable difference between the systems in these two countries, as regards issues of management and governance, dominant rent regimes (cost rent, social rent) or eligibility...

  17. Bio-SNG potential assessment: Denmark 2020

    Energy Technology Data Exchange (ETDEWEB)

    Ahrenfeldt, J.; Thomsen, T. (Risoe DTU, Roskilde (Denmark)); Joergensen, Betina (Dansk Gasteknisk Center A/S, Hoersholm (Denmark))

    2010-11-15

    In this project the potential for SNG based on biomass gasification has been sought elucidated. As part of the project a model for simulation of biomass in Denmark has been developed. The conclusion is that SNG can substitute a significant amount of natural gas, but the energy efficiency should be improved. (Author)

  18. Maternal deaths in Denmark 2002-2006

    DEFF Research Database (Denmark)

    Bødker, Birgit; Hvidman, Lone; Weber, Tom

    2009-01-01

    OBJECTIVE: To describe a method for identification, classification and assessment of maternal deaths in Denmark and to identify substandard care. DESIGN: Register study and case audit based on data from the Registers of the Danish Medical Health Board, death certificates and hospital records. SET...

  19. Policies in Dementia, comparing Germany and Denmark

    DEFF Research Database (Denmark)

    Bjerregaard, Lene Berit Skov

    2017-01-01

    In Short Germany as well as Denmark are focusing on the same issues regarding Dementia, as other European Countries are, too. The key issues in the national strategies are: timely diagnosis, self-determination for the person with dementia, unbroken “care chain”, better possibilities for the relief...

  20. Prospect for organic farming in Denmark

    DEFF Research Database (Denmark)

    Jacobsen, Lars-Bo

    2005-01-01

    in organic production has led to surplus supply of organic products, especially milk. In this paper we use a dynamic general equilibrium model specifically developed for forecasting the Danish economy towards 2022 to explore the future development of the organic production in Denmark. Several policy...

  1. The true incidence of cryptorchidism in Denmark

    DEFF Research Database (Denmark)

    Cortes, Dina; Kjellberg, Emma M; Breddam, Mette

    2008-01-01

    testes. Conclusions: In a small cohort of newborns the incidence of cryptorchidism in Denmark has not changed, and is similar to previous reports from the 1950s. The risk is higher in low birth weight singleton neonates but does not appear to be higher in twins, despite lower birth weight and prematurity...

  2. The cost of tuberculosis in Denmark

    DEFF Research Database (Denmark)

    Fløe, Andreas; Hilberg, Ole; Wejse, Christian

    Hypothesis: Tuberculosis (TB) patients carry higher direct health-related and indirect costs than the general population. Objective: To calculate the economic burden of TB in Denmark, including the health-related costs of treatment and the indirect costs for society in a national retrospective case...

  3. A review of paediatric tuberculosis in Denmark

    DEFF Research Database (Denmark)

    Hatleberg, Camilla; Prahl, Julie B; Rasmussen, Jeppe Nørgaard

    2014-01-01

    Paediatric tuberculosis (TB) is a key indicator for recent transmission and presents a reservoir for the disease. We describe trends in epidemiology, microbiological characteristics and treatment outcome in Denmark between 2000 and 2009. Data was retrieved from the national TB surveillance system...

  4. High mortality from tuberculosis in Denmark

    DEFF Research Database (Denmark)

    Fløe, Andreas; Hilberg, Ole; Wejse, Christian

    Hypothesis: We hypothesize that survival among TB-patients in Denmark is lower than among the general population. Objective: To evaluate survival in a national Danish TB cohort, and to estimate relative survival compared with population controls with no TB diagnosis, in a retrospective case-contr...

  5. Molecular Typing of Treponema pallidum in Denmark

    DEFF Research Database (Denmark)

    Salado-Rasmussen, Kirsten; Cowan, Susan; Gerstoft, Jan

    2016-01-01

    The aim of this nationwide study is to determine the strain type diversity among patients diagnosed with syphilis by PCR during a 4-year period in Denmark. Epidemiological data, including HIV status, for all patients were obtained from the Danish national syphilis registration system. Molecular...

  6. Foreign Direct Investments into Denmark before 1939

    DEFF Research Database (Denmark)

    Pedersen, Kurt; Strandskov, Jesper

    2008-01-01

    Abstract Drawing on a new database, this article presents the first systematic description and assessment of inward FDI into Denmark before World War II. A total of 168 cases were identified, with British, American and German firms dominating the overall picture as might be expected. The composit...

  7. Experimental study and mechanism analysis of modified limestone by red mud for improving desulfurization

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Hongtao; Han, Kuihua; Niu, Shengli; Lu, Chunmei; Liu, Mengqi; Li, Hui [Shandong Univ., Jinan (China). School of Energy and Power Engineering

    2013-07-01

    Red mud is a type of solid waste generated during alumina production from bauxite, and how to dispose and utilize red mud in a large scale is yet a question with no satisfied answer. This paper attempts to use red mud as a kind of additive to modify the limestone. The enhancement of the sulfation reaction of limestone by red mud (two kinds of Bayer process red mud and one kind of sintering process red mud) are studied by a tube furnace reactor. The calcination and sulfation process and kinetics are investigated in a thermogravimetric (TG) analyzer. The results show that red mud can effectively improve the desulfurization performance of limestone in the whole temperature range (1,073-1,373K). Sulfur capacity of limestone (means quality of SO{sub 2} which can be retained by 100mg of limestone) can be increased by 25.73, 7.17 and 15.31% while the utilization of calcium can be increased from 39.68 to 64.13%, 60.61 and 61.16% after modified by three kinds of red mud under calcium/metallic element (metallic element described here means all metallic elements which can play a catalytic effect on the sulfation process, including the Na, K, Fe, Ti) ratio being 15, at the temperature of 1,173K. The structure of limestone modified by red mud is interlaced and tridimensional which is conducive to the sulfation reaction. The phase composition analysis measured by XRD of modified limestone sulfated at high temperature shows that there are correspondingly more sulphates for silicate and aluminate complexes of calcium existing in the products. Temperature, calcium/metallic element ratio and particle diameter are important factors as for the sulfation reaction. The optimum results can be obtained as calcium/metallic element ratio being 15. Calcination characteristic of limestone modified by red mud shows a migration to lower temperature direction. The enhancement of sulfation by doping red mud is more pronounced once the product layer has been formed and consequently the promoting

  8. Nomination of the Globigerina Limestone of the Maltese Islands as a "Global Heritage Stone Resource"

    Science.gov (United States)

    Cassar, JoAnn

    2016-04-01

    The Maltese Islands consist of two main islands, Malta and Gozo, as well as a small number of islets, and lie in the central Mediterranean Sea approximately 90 km south of Sicily. Although only 316 square kilometres in size, the Islands contain a rich concentration of archaeological sites and historic buildings, as well as vernacular architecture and modern buildings, for the most part built of the local Globigerina Limestone, which is one of the few natural resources of the Islands. This stone can be described as a typical "soft limestone", very easy to carve and shape. It forms part of the large family of Oligo-Miocene "soft limestones" widely diffused in the Mediterranean Basin. The Maltese Globigerina Limestone Formation is one of five main Formations, and varies in thickness from 20 to over 200 m. The material used for building is located stratigraphically in the lower part of the Globigerina Limestone Formation, called the Lower Globigerina Limestone. This Formation is stratified into thick beds at outcrop. Sections where bioturbation is concentrated often also occur. This limestone is fine-grained, yellow to pale grey in colour, almost wholly composed of the tests of globigerinid planktonic foraminifera. Petrographically, Globigerina Limestone can be described as a bioclastic packstone, with bioclastic wackestones also occurring. This limestone has always been used as the predominant building material in the Islands. The Maltese prehistoric Temples, which were constructed approximately 6000 years ago, bear testimony to this. Between 1530 and 1798 the Order of the Knights of St John built kilometres of fortifications in this same material to protect the Island from the expanding Ottoman Empire. Fortifications, impressive churches, auberges and palaces were built of this stone during this period. The capital city of Valletta, a rich and dense manifestation of Baroque architecture in Globigerina Limestone, is included on the UNESCO World Heritage List, as are

  9. Studies on the preparation of value-added products for limestone

    Energy Technology Data Exchange (ETDEWEB)

    Chae, Young Bae; Jeong, Soo Bok; Ko, Won Sik; Park, Je Shin; Oh, Jung Whan [Korea Institute of Geology Mining and Materials, Taejon (Korea, Republic of)

    1997-12-01

    Most of limestone in our country was consumed by the cement and iron/steel making industries and the amount of that was up to 72 million ton in 1996. Recently, importation of high grade limestone that have properties of high whiteness and grade are increased with diversification of chemical products and powder as various qualified filler, because high grade limestone are limited and of few deposit in our country. Therefore, the purpose of this study has investigated to raise to high grade by economical processes with low grade of domestic limestone. In this year, first of all, we investigated the status of application utilize and related industries with the domestic limestone, and then being consideration with condition selected the adequate sample from Andong, Jungsun and Kumsan area. Magnetic materials were involved in impurities of sample, so magnetic separation method was applied in elimination of the ferro-magnetic materials and para-magnetic materials, such as chlorite, muscovite, quartz, dolomite, magnetite, feldspar and so on. The limestone sample has many kinds of impurity. Investigation of flotation was undertaken to eliminate impurities from limestone crude ore and the tests were performed to get a optimum condition adding oleic acid as a promoter, sodium silicate and sodium carbonate as a conditioning agents and MIBC as a frother, while to float the sulfide minerals added amyl xanthate as a promoter, and sulfuric acid as a pH regulator. And most of the impurities involving in flotation sink contained such as quartz, chlorite, muscovite, feldspar, dolomite and so on. Selective crushing and classification methods were performed to eliminate impurities depends on the mineral properties and should be the selective crushing methods are very useful at the manufacturing factory of heavy calcium carbonate with the dry milling system. (author). 36 refs., 46 tabs., 33 figs.

  10. Ecological Study in Two Quarried Limestone Karst Hills in Bogor West Java: Vegetation Structure and Floristic Composition

    OpenAIRE

    SATYANTI, ANNISA; CANDRA KUSUMA, YAYAN WAHYU

    2010-01-01

    Many species extinctions have probably gone unnoticed on limestone that was destroyed before they could be sampled. Unless biodiversity surveys are intensified, the true magnitude of extinctions will never be ascertained. The objectives of this study were to determine tree species composition of limestone hills in Nyungcung and Ciampea; to determine quantitatively the dominant and less dominant species and to quantify floristic structure of the two limestone hills. Value of richness (Menhinic...

  11. Effective stress law for the permeability and deformation of four porous limestones

    Science.gov (United States)

    Wang, Y.; Meng, F.; Wang, X.; Baud, P.; Wong, T. F.

    2017-12-01

    The effective stress behavior of a rock is related to the geometric of its pore space. In a microscopically homogeneous assemblage, effective stress coefficients for permeability, volumetric strain and porosity change are predicted to be equal to or less than unity. Experimental measurements are in basic agreement with this prediction, with exceptions particularly in clay-rich sandstones, for which effective stress coefficient for permeability up to 7 was documented. Little is known about carbonates, but Ghabezloo et al. [2009] studied the permeability of an oolitic limestone (from Nimes, France) with 17% porosity and reported effective stress coefficients up to 2.4. We investigated this phenomenon in Indiana, Leitha, Purbeck, and Thala limestones with porosities of 13-30%. Measurements were made at room temperature on water-saturated samples at confining and pore pressures of 7-15 MPa and 1-3 MPa, respectively. Unlike previous studies limited to the permeability, we also determined the effective stress coefficients for volumetric strain and porosity change. Indiana limestone is oolitic, and not surprisingly its behaviour was similar to Nimes limestone, with an effective stress coefficient for permeability of 2.5. Our Indiana limestone data showed that whereas the effective stress coefficient for volumetric strain was 1. Measurements on Purbeck and Thala limestones are consistent with these inequalities, with effective stress coefficients for permeability and porosity change >1 and that for volumetric strain <1. Even though Purbeck and Thala limestones are micritic with appreciable amount of quartz and dolomite, microstructural and mercury porosimetry data showed that their pore spaces are similar to the oolitic limestones, in that the pore size distribution is bimodal with significant fractions of both macropores and micropores. Berryman [1992] analyzed theoretically a rock made up of two porous constituents. Our new data are in agreement with inequalities he

  12. Drenov Grič black limestone as a heritage stone from Slovenia

    Science.gov (United States)

    Kramar, Sabina; Rožič, Boštjan; Žbona, Nina; Bedjanič, Mojca; Mladenović, Ana

    2016-04-01

    The limestone known as Drenov Grič black limestone is considered one of the most beautiful Slovenian natural stones due to its homogenous black colour interwoven with white veins. Over the centuries it has been exploited from three major quarries west of Ljubljana, with the main quarry at Drenov Grič playing the primary role in supplying building material for the central parts of Slovenia. All the quarries are currently not active. In the area of Drenov grič, one locality of black limestone is protected - Kuclerjev kamnolom quarry. It has the status of 'valuable natural feature of national importance' and is protected as a natural monument. This well-stratified micritic limestone of Triassic (Carnian) age occurs in 10-80 cm thick beds, with thin marl interlayers. The stone contains abundant fossil bivalves and ostracods. Apart from calcite as the main component, dolomite, quartz, illite/muscovite and pyrite are also present. The limestone is relatively rich in carbonaceous and bituminous organic matter, which is responsible for the black colour of the stone. This component does not have any adverse effect on mechanical and physical characteristics. As the lime¬stone is dense, thus facilitating a good polish, it has been commercially considered as marble. The stone has been widely used in Slovenian monuments, not only in Ljubljana but also in other regions of Slovenia. Many inner and outdoor architectural elements were made of this limestone, particularly in the baroque period, which was known for the extensive use of black limestones also in other European countries. The most significant use of this limestone has been recorded in sculptured portals and altars. Some of the important buildings decorated utilising this stone, are the Ljubljana Cathedral, the St. James's Parish Church, and the Franciscan Church of the Annunciation, all of which are located in Ljubljana, some of them having been declared as cultural monuments of local or national importance. When

  13. Steam Cured Self-Consolidating Concrete and the Effects of Limestone Filler

    Science.gov (United States)

    Aqel, Mohammad A.

    The purpose of this thesis is to determine the effect and the mechanisms associated with replacing 15% of the cement by limestone filler on the mechanical properties and durability performance of self-consolidating concrete designed and cured for precast/prestressed applications. This study investigates the role of limestone filler on the hydration kinetics, mechanical properties (12 hours to 300 days), microstructural and durability performance (rapid chloride permeability, linear shrinkage, sulfate resistance, freeze-thaw resistance and salt scaling resistance) of various self-consolidating concrete mix designs containing 5% silica fume and steam cured at a maximum holding temperature of 55°C. This research also examines the resistance to delayed ettringite formation when the concrete is steam cured at 70°C and 82°C and its secondary consequences on the freeze-thaw resistance. The effect of several experimental variables related to the concrete mix design and also the curing conditions are examined, namely: limestone filler fineness, limestone filler content, cement type, steam curing duration and steam curing temperature. In general, the results reveal that self-consolidating concrete containing 15% limestone filler, steam cured at 55°C, 70°C and 82°C, exhibited similar or superior mechanical and transport properties as well as long term durability performance compared to similar concrete without limestone filler. When the concrete is steam cured at 55°C, the chemical reactivity of limestone filler has an important role in enhancing the mechanical properties at 16 hours (compared to the concrete without limestone filler) and compensating for the dilution effect at 28 days. Although, at 300 days, the expansion of all concrete mixes are below 0.05%, the corresponding freeze-thaw durability factors vary widely and are controlled by the steam curing temperature and the chemical composition of the cement. Overall, the material properties indicate that the use

  14. Factors involved in the selection of limestone reagents for use in wet FGD systems

    International Nuclear Information System (INIS)

    Jarvis, J.B.; Roothaan, E.S.; Meserole, F.B.; Owens, D.R.

    1992-01-01

    With recent activity in the design and construction of retrofit flue gas desulfurization (FGD) systems, many utilities are faced with the task of selecting limestones which will allow FGD systems to function as designed, and at the same time, provide cost-effective operation. The Electric Power Research Institute (EPRI) has sponsored research to identify factors which should be considered in the reagent selection process. A set of capabilities has been developed which is currently being employed to assist six utilities in selecting cost-effective reagent sources. The major elements in the selection package consist of an analytical characterization of candidate limestones; grindability, reactivity, and magnesium availability testing; and performance modeling utilizing EPRI's FGD PRocess Integration and Simulation Model (FGDPRISM). The results from these measurements are used to perform a site-specific economic analysis which can be used to rank the candidate limestones and quantify the impact of various limestone properties on plant operating costs. This paper includes a description of each element in the selection package along with a review of current research activities aimed at improving predictions of limestone reactivity and magnesium availability. An example is presented which illustrates how reactivity and magnesium availability affect both the performance of an FGD system and plant operating costs

  15. Ruminal degradation of dry matter and neutral detergent fiber of banana peel treated with limestone

    Directory of Open Access Journals (Sweden)

    Flávio Pinto Monção

    2016-02-01

    Full Text Available This study aimed to evaluate the kinetics of dry matter degradation and neutral detergent fiber of banana peel treated with limestone. The banana peel has been acquired from a candy manufacturer that after washing with chlorinated water to 1% and pulp removal was discarded. The banana peel in nature was treated with 1, 2, 3 and 4% of limestone in the natural matter, homogenized and pre-dried in the sun for 120 hours. The experiment was conducted in a completely randomized experimental design, with five treatments (0 (control, 1, 2, 3 and 4% inclusion of limestone with 3 repetitions. The dry matter potential degradability, showed no difference (P>0.05 in the levels compared to the control with an average of 67.58%. The insoluble degradation fraction rate of dry matter and the fiber fraction did not differ (P> 0.05 between levels and control. In relation to effective degradability of neutral detergent fiber, there was an increase of 3.47% for each percentage unit increased limestone. In relation to the ruminal degradation parameters of dry matter and neutral detergent fiber is not recommended the utilization of limestone as an additive in the treatment of banana peel.

  16. Gamma radiation influence on Cladonia substellata (lichen) and its effects on limestone rocks

    International Nuclear Information System (INIS)

    Silva, Helena P. de B.; Colaco, Waldeciro; Pereira, Eugenia C.; Silva, Nicacio H. da

    2009-01-01

    The lichens play an important role in decomposition of the rocky substrate, through the chemical weathering of their substances. This work aimed to determine the influence of gamma Ray on usnic acid production of Cladonia substellata and the influence of chelates formation in limestone rocks. Samples with 2.5 g of C. substellata were packed on paper envelopes for irradiation submission to gamma on a Co-60 source. They received 10 different doses: 5, 7, 10, 15, 20, 30, 40, 50, 60 and 80 Gy. Lichen irradiation was conducted on the gamma irradiator (Co-60), and packed over powdered limestone. Lichen samples were analyzed by High Performance Liquid Chromatography (HPLC) and rocky samples by X-Ray Diffractometry. The X-ray diffractogram obtained from the analysis of limestone not subjected to the action of lichen - control sample was compared with limestone subjected to C. substellata irradiated at doses 10, 30 and 80Gy. Increased production of the usnic acid and changes on the rocky samples were noted. We realized that C. substellata increments the usnic acid biosynthesis as the gamma radiation dose is increased, but there is a limit to it. The chelating effect of the usnic acid on limestone was proportional to the produced amount of the substance, which could be extrapolated to natural conditions, where excessive radiation may influence pedogenesis and ecological succession. (author)

  17. Microfacies and Diagenetic Fabric of the Lockhart Limestone, Kotal Pass Section, Northeast of Kohat, Pakistan

    Directory of Open Access Journals (Sweden)

    Muhammad Waseem Khan

    2016-06-01

    Full Text Available The present study is intended to describe the carbonate microfacies of the Paleocene Lockhart Limestone in area northeast of the Kohat City. The analyzed limestone in the area is 65m thick and predominantly medium to thick bedded, nodular to brecciated and richly fossiliferous. Thin interbeds of marl are observed in the main lithological unit. The lower contact of the Lockhart Limestone is faulted with the Samana Suk Formation of the Jurassic age while conformably overlain by the Patala Formation of Paleocene to Eocene age. The major lithological unit is comprised of predominant assemblage of larger benthic and smaller planktonic foraminifers with accretion of ostracods, dasycladacean algae, echinoderms, gastropods and corals. On the basis of field and laboratory observations, two distinct types of microfacies have been identified as i Dasyclad-Miliolid Foram Wacke-Packstone microfacies of the inner shelf, sub tidal lagoon, ii Larger Foram Packstone microfacies of the middle shelf. The Limestone represents a carbonate cyclic sequence marked by three, transgressive, deepening up cycles representing a gradual sea level rise compensated by vertical accumulation of microfacies. The commencement of each cycle is clearly marked by the input of land-derived siliciclastic sediments and near shore restricted marine faunal/floral assemblage in the inner shelf microfacies gradually thinning up section where the microfacies become deeper offshore. The diagenetic modifications are observed in the shape of compactional framework, dolomitization, aragonite to calcite alteration and spar filled fractures in the main lithological unit of the Lockhart Limestone.

  18. Reclamation of acidic colliery spoil. III. Problems associated with the use of high rates of limestone

    Energy Technology Data Exchange (ETDEWEB)

    Costigan, P A [Univ. of Liverpool, England; Bradshaw, A D; Gemmell, R P

    1982-04-01

    Growth of Trifolium repens in acidic colliery spoil was suppressed by more than 90% when agricultural ground calcitic limestone was applied at above 5 t ha/sup -1/ whereas Lolium perenne was unaffected at rates up to 100 t ha/sup -1/. The inhibitory effect of ground limestone on T. repens was reduced by high phosphorus fertilization and disappeared within 34 weeks of treatment.There was some evidence that high liming caused an imbalance of the Ca/Mg ratio in freshly limed spoil, contribution to growth inhibition. Growth of L. perene was improved and the inhibitory effect on T. repens was alleviated by substituting magnesian limestone (dolomite) for calcitic limestone. Phosphate adsorption of spoil was similar after low and very high limestone applications but increased by 100% after liming at 25 t ha/sup -1/ to pH 5.1.It is suggested that phosphate adsorption at pH 5.1 is caused by freshly precipitated amorphous aluminium hydroxide. The practical implications of the results are discussed.

  19. Actinobacterial diversity in limestone deposit sites in Hundung, Manipur (India and their antimicrobial activities

    Directory of Open Access Journals (Sweden)

    Salam eNimaichand

    2015-05-01

    Full Text Available Studies on actinobacterial diversity in limestone habitats are scarce. This paper reports profiling of actinobacteria isolated from Hundung limestone samples in Manipur, India using ARDRA as the molecular tool for preliminary classification. A total of 137 actinobacteria were clustered into 31 phylotypic groups based on the ARDRA pattern generated and representative of each group was subjected to 16S rRNA gene sequencing. Generic diversity of the limestone isolates consisted of Streptomyces (15 phylotypic groups, Micromonospora (4, Amycolatopsis (3, Arthrobacter (3, Kitasatospora (2, Janibacter (1, Nocardia (1, Pseudonocardia (1 and Rhodococcus (1. Considering the antimicrobial potential of these actinobacteria, 19 showed antimicrobial activities against at least one of the bacterial and candidal test pathogens, while 45 exhibit biocontrol activities against at least one of the rice fungal pathogens. Out of the 137 actinobacterial isolates, 118 were found to have at least one of the three biosynthetic gene clusters (PKS-I, PKS-II, NRPS. The results indicate that 86% of the strains isolated from Hundung limestone deposit sites possessed biosynthetic gene clusters of which 40% exhibited antimicrobial activities. It can, therefore, be concluded that limestone habitat is a promising source for search of novel secondary metabolites.

  20. Impacts of Limestone Multi-particle Size on Production Performance, Egg Shell Quality, and Egg Quality in Laying Hens

    Directory of Open Access Journals (Sweden)

    X. Y. Guo

    2012-06-01

    Full Text Available This experiment was conducted to evaluate the effects of single or multi-particle size limestone on the egg shell quality, egg production, egg quality and feed intake in laying hens. A total of 280 laying hens (ISA brown were used in this 10-wk trial. Laying hens were randomly assigned to 4 treatments with 14 replications per treatment and 5 adjacent cages as a replication (hens were caged individually. The experimental treatments were: i L, basal diet+10% large particle limestone; ii LS1, basal diet+8% large particle limestone+2% small particle limestone; iii LS2, basal diet+6% large particle limestone+4% small particle limestone; iv S, basal diet+10% small particle limestone. The egg production was unaffected by dietary treatments. The egg weight in S treatment was lighter than other treatments (p<0.05. The egg specific gravity in S treatment was lower than other treatments (p<0.05. The eggshell strength and eggshell thickness in S treatment were decreased when compared with other dietary treatments (p<0.05. The laying hens in LS1 and LS2 treatment had a higher average feed intake than the other two treatments (p<0.05. Collectively, the dietary multi-particle size limestone supplementation could be as efficient as large particle size limestone.

  1. Porosity development in the Copper Ridge Dolomite and Maynardville Limestone, Bear Creek Valley and Chestnut Ridge, Tennessee

    International Nuclear Information System (INIS)

    Goldstrand, P.M.; Menefee, L.S.; Dreier, R.B.

    1995-12-01

    Matrix porosity data from deep core obtained in Bear Creek Valley indicate that porosities in the Maynardville Limestone are lithology and depth dependent. Matrix porosities are greater in the Cooper Ridge Dolomite than in the Maynardville Limestone, yet there is no apparent correlation with depth. Two interrelated diagenetic processes are the major controlling factors on porosity development in the Copper Ridge Dolomite and Maynardville Limestone; dissolution of evaporate minerals and dedolomitization. Both of these diagenetic processes produce matrix porosities between 2.1 and 1.3% in the Copper Ridge Dolomite and upper part of the Maynardville Limestone (Zone 6) to depths of approximately 600 ft bgs. Mean matrix porosities in Zones 5 through 2 of the Maynardville Limestone range from 0.8 to 0.5%. A large number of cavities have been intersected during drilling activities in nearly all zones of the Maynardville Limestone in Bear Creek Valley. Therefore, any maynardville Limestone zone within approximately 200 ft of the ground surface is likely to contain cavities that allow significant and rapid flow of groundwater. Zone 6 could be an important stratigraphic unit in the Maynardville Limestone for groundwater flow and contaminant transport because of the abundance of vuggy and moldic porosities. There are large variations in the thickness and lithology in the lower part of the Maynardville (Zones 2, 3, and 4 in the Burial Grounds region). The direction and velocity of strike-parallel groundwater flow may be altered in this area within the lower Maynardville Limestone

  2. Accreditation in general practice in Denmark

    DEFF Research Database (Denmark)

    Andersen, Merethe K; Pedersen, Line B; Siersma, Volkert

    2017-01-01

    Background: Accreditation is used increasingly in health systems worldwide. However, there is a lack of evidence on the effects of accreditation, particularly in general practice. In 2016 a mandatory accreditation scheme was initiated in Denmark, and during a 3-year period all practices, as default...... general practitioners in Denmark. Practices allocated to accreditation in 2016 serve as the intervention group, and practices allocated to accreditation in 2018 serve as controls. The selected outcomes should meet the following criteria: (1) a high degree of clinical relevance; (2) the possibility...... practice and mortality. All outcomes relate to quality indicators included in the Danish Healthcare Quality Program, which is based on general principles for accreditation. Discussion: The consequences of accreditation and standard-setting processes are generally under-researched, particularly in general...

  3. Power and Democracy in Denmark. Conclusions

    DEFF Research Database (Denmark)

    Andersen, Jørgen Goul; Christiansen, Peter Munk; Beck Jørgensen, Torben

    In 1997, the Danish Parliament decided to launch a power study, officially An Analysis of Democracy and Power in Denmark. A steering committee consisting of five independent researchers was assigned responsibility for the project. The Steering Committee has gathered the overall conclusions from...... the numerous projects under the Power Study, and this book is a short presentation of these conclusions.The main focus of the book is the state of democracy in Denmark at the dawn of the 21st century. How has democracy fared, has the development made things better or worse, and to which extent does......, and the political institutions show considerable democratic robustness. However, not everything has gone or is going well. There are still pronounced social divisions in Danish society, although their nature has changed somewhat. The ideal of an informed public debate does not always enjoy the best conditions...

  4. Prevalence of generalized retinal dystrophy in Denmark

    DEFF Research Database (Denmark)

    Bertelsen, Mette; Jensen, Hanne; Bregnhøj, Jesper F

    2014-01-01

    of this study was to examine the prevalence and diagnostic spectrum of generalized retinal dystrophy in the Danish population. METHODS: A population-based cross-sectional study with data from the Danish Retinitis Pigmentosa Registry that comprises all patients in Denmark with generalized retinal......PURPOSE: Generalized retinal dystrophy is a frequent cause of visual impairment and blindness in younger individuals and a subject of new clinical intervention trials. Nonetheless, there are few nation-wide population-based epidemiological data of generalized retinal dystrophy. The purpose...... and chorioretinal dystrophies from the 19th century to the present. Among 3076 registered cases, the primary diagnosis of generalized retinal dystrophy was assessed by chart review, including fundus photographs and electroretinograms. Demographic data on the Danish population were retrieved from Statistics Denmark...

  5. Societal costs of diabetes mellitus in Denmark

    DEFF Research Database (Denmark)

    Sortsø, C; Green, A; Jensen, Peter Bjødstrup

    2016-01-01

    AIM: To provide comprehensive real-world evidence on societal diabetes-attributable costs in Denmark. METHODS: National register data are linked on an individual level through unique central personal registration numbers in Denmark. All patients in the Danish National Diabetes Register in 2011 (N...... = 318 729) were included in this study. Complication status was defined according to data from the Danish National Hospital Register. Diabetes-attributable costs were calculated as the difference between costs of patients with diabetes and the expected costs given the annual resource consumption...... of the diabetes-free population. RESULTS: Societal costs attributable to diabetes were estimated to be at least 4.27 billion EUR in 2011, corresponding to 14,349 EUR per patient-year. A twofold higher healthcare resource usage was found for patients with diabetes as compared with the diabetes-free population...

  6. Neonatal herpes in Denmark 1977-1991

    DEFF Research Database (Denmark)

    Fonnest, G; de la Fuente Fonnest, I; Weber, Tom

    1997-01-01

    : All newborns with perinatal herpes in Denmark 1977-1991 were identified from hospital-records. RESULTS: Of 862,298 deliveries 136 possible cases were found but only 30 (22%) fulfilled the criteria for neonatal herpes. The incidence increased from 2.36 to 4.56 per 100,000 live births during 1977...... herpes recurrence. Four infants had a serious infection in spite of Cesarean section. This study does not support a policy of Cesarean section in case of maternal recurrent herpes simplex infection at delivery.......BACKGROUND: To prevent neonatal herpes, women in labor with genital herpes infection are still delivered by Cesarean section. This policy is currently being debated. The aim of this study was to determine the incidence of neonatal herpes in Denmark and to evaluate the prevention practice. METHODS...

  7. Environmental economy account for Denmark 2000

    International Nuclear Information System (INIS)

    Anon.

    2002-01-01

    The article deals with energy consumption, emission of pollutants to the atmosphere, water consumption, and environmental taxes and subsidies in relation to the Danish National Accounts. Furthermore the article presents status of the values of the petroleum and gas reserves. The environmental-economic account for Denmark shows that the contribution to the greenhouse effect has increased with 9% while the acidification in Denmark has decreased with 45% from 1999 to 2000. This must be seen in relation to the fact that the economic activities in the same period have increased with 26%. The information presented in the environmental-economic account can be used to show so-called profiles of the consumption and production branches where a comparison is made of the branches for several areas and dimensions. Industry etc. accounts for 17% of the total employment representing 26% of the total production value, and it uses 37% of the gross energy consumption. (LN)

  8. Quality assessment of home births in Denmark

    DEFF Research Database (Denmark)

    Jensen, Sabrina; Colmorn, Lotte B.; Schroll, Anne-Mette

    2017-01-01

    by nulliparous at home. CONCLUSIONS: This study indicates that home births in Denmark are characterized by a high level of safety owing to low rates of perinatal mortality and morbidity. Missing registration on intrapartum transfers and planned versus unplanned home births in the DMBR are, however, major......INTRODUCTION: The safety of home births has been widely debated. Observational studies examining maternal and neonatal outcomes of home births have become more frequent, and the quality of these studies has improved. The aim of the present study was to describe neonatal outcomes of home births...... compared with hospital births and to discuss which data are needed to evaluate the safety of home births. METHODS: This was a register-based cohort study. Data on all births in Denmark (2003-2013) were collected from the Danish Medical Birth Registry (DMBR). The cohort included healthy women...

  9. The Evolution of Inclusive Education in Denmark

    DEFF Research Database (Denmark)

    Engsig, Thomas Thyrring

    The notion of inclusive education in the public school system is highly debated in Denmark, and internationally. Teachers and school leaders in Denmark are struggling with identifying good inclusive practices, and there seems to be discrepancies between multiple national educational policies, which...... inform teachers and stakeholders in their understanding of inclusive education.The Danish government passed and initiated a large reform of the Danish public school system in the beginning of 2014. Among other key aspects, the reform involves a more goal-oriented school with quantifiable national goals...... that 97% of the country’s students are to receive their education in the public school’s general education by 2020. Furthermore, the so-called ‘Inclusion law’, as it is commonly called, was passed in the Danish parliament in April 2012 (Law no. 379). The main purpose of this law was to redefine the notion...

  10. Communal politics and religious difference in Denmark

    DEFF Research Database (Denmark)

    Fogelman, Tatiana

    Most scholars and lay observers alike see Copenhagen as "a pioneering municipality and a role-model for other municipalities with respect to diversity" in Denmark (Andersen et al 2014: 4). In 2014 the city itself has boasted that it had become the 3rd most inclusive city in Europe, according...... to the Intercultural cities index, and claimed it was well on its way to achieve its goal to become "the most inclusive metropolis in Europe" by the year 2015. That very same year, however, left-dominated Copenhagen municipality ended the decades-long cooperation agreement with the only Jewish nursery and preschool...... in Denmark, effectively forcing it to leave the public sphere and privatize. This came about as the municipality's Children and Youth Committee withdrew its previous willingness to accommodate the daycare's need for more closed days (due to Jewish holidays) than the officially permitted number. Drawing...

  11. Work injuries among migrant workers in Denmark

    DEFF Research Database (Denmark)

    Biering, Karin; Lander, Flemming; Rasmussen, Kurt

    2017-01-01

    to methodological difficulties and cultural disparities. We set out to meet these challenges using population-based work injury registers, targeting a specific and representative region in Denmark. METHODS: This population-based study used data on work injuries from an emergency department (ED) and reported....... Workers who had migrated recently were at even higher risk. CONCLUSIONS: We found increased risk of work injuries among migrant workers. Studying migrants in registers is a methodological challenge as some migrants are not registered, for legal or illegal reasons; thus, only a selected group is studied......OBJECTIVES: Work migration into Denmark has increased during the recent decades, especially after the enlargement of the European Union (EU) in 2004. Whether or not migrant workers experience more work injuries than the native workforce has been debated and results are conflicting, most likely due...

  12. Neonatal herpes in Denmark 1977-1991

    DEFF Research Database (Denmark)

    Fonnest, G; de la Fuente Fonnest, I; Weber, Tom

    1997-01-01

    BACKGROUND: To prevent neonatal herpes, women in labor with genital herpes infection are still delivered by Cesarean section. This policy is currently being debated. The aim of this study was to determine the incidence of neonatal herpes in Denmark and to evaluate the prevention practice. METHODS......: All newborns with perinatal herpes in Denmark 1977-1991 were identified from hospital-records. RESULTS: Of 862,298 deliveries 136 possible cases were found but only 30 (22%) fulfilled the criteria for neonatal herpes. The incidence increased from 2.36 to 4.56 per 100,000 live births during 1977......-1984 through 1984-1991. Three mothers (10%) had recurrent herpes at delivery, three (10%) had primary herpes, and five (17%) had oral herpes. Seven infants (23%) were delivered by Cesarean section. Nine (30%) only had cutaneous herpes, four (13%) had CNS herpes, nine (30%) had disseminated disease. Six (20...

  13. Environmental radioactivity in Denmark in 1975

    International Nuclear Information System (INIS)

    Aarkrog, A.; Lippert, J.

    1976-06-01

    The present report deals with the measurement of fall-out radioactivity in Denmark in 1975. Strontium-90 was determined in samples from all over the country of precipitation, soil, ground water, stream and lake water, sea water, grass, dried milk, fresh milk, grain, bread, potatoes, vegetables, fruit, total diet, and human bone. Furthermore, 90 Sr was determined in local samples of air, rain water, grass, sea plants, fish, and meat. Caesium-137 was determined in soil, sea water, milk, grain products, potatoes, vegetables, fruit, total diet, fish, and meat. It was also measured by wholebody-counting of a control group at Risoe. Estimates of the mean contents of radiostrontium and radiocaesium in the human diet in Denmark during 1975 are given. The gamma-background was measured regularly at locations around Risoe, and at ten of the State experimental farms. Finnaly the report includes routine surveys of environmental samples from the Risoe area. (author)

  14. Power applications for superconducting cables in Denmark

    DEFF Research Database (Denmark)

    Tønnesen, Ole; Østergaard, Jacob; Olsen, S. Krüger

    1999-01-01

    In Denmark a growing concern for environmental protection has lead to wishes that the open country is kept free of overhead lines as far as possible. New lines under 100 kV and existing 60/50 kV lines should be established as underground cables. Superconducting cables represent an interesting...... in cases such as transmission of energy into cities and through areas of special interest. The planned large groups of windmills in Denmark generating up to 2000 MVA or more both on dry land and off-shore will be an obvious case for the application of superconducting AC or DC cables. These opportunities...... can be combined with other new technologies such as HVDC light transmission using isolated gate bipolar transistors (IGBTs). The network needed in a system with a substantial wind power generation has to be very strong in order to handle energy fluctuations. Such a network will be possible...

  15. Education and ethnic minorities in Denmark

    DEFF Research Database (Denmark)

    Colding, Bjørg

    The objective of this dissertaion is to investigate educational behavior of ethnic monorities i Denmark. The focus of the analyses undertaken in the three papers included in the dissertation si, first, to what extent differences in educational choices, and consequently in educational attainmant, ......, among ethnic minorities and native danes can be explainedby differences i parental, family and ethnic background and, second, how education resources are allocated among children within ethnic minorities families.......The objective of this dissertaion is to investigate educational behavior of ethnic monorities i Denmark. The focus of the analyses undertaken in the three papers included in the dissertation si, first, to what extent differences in educational choices, and consequently in educational attainmant...

  16. Religious Education research in welfare state Denmark

    DEFF Research Database (Denmark)

    Buchardt, Mette

    2017-01-01

    The article deals with forms of knowledge and types of research interests in scholarly work on Religious Education at the primary and lower secondary levels in Denmark throughout the heyday of the welfare state from the 1960s and up until the 2000s, when the welfare state model not least...... and thus in a changed institutional field. Drawing on the conceptual understanding of the field of educational sciences deriving from Hofstetter and Schneuwly (2002), the article analyzes ways of doing research in and related to Religious Education and the scholarly disciplines involved. Focus...... with regard to education was in transition. The point of departure is the work and oeuvre of K.E. Bugge, for many years – and remaining until now – the last professor of Religious Education in Denmark, namely at the Royal Danish School of Education (Danmarks Lærerhøjskole) which reorganized as Danish...

  17. Outcome of breast cancer screening in Denmark

    DEFF Research Database (Denmark)

    Lynge, Elsebeth; Bak, Martin; von Euler-Chelpin, My

    2017-01-01

    were node negative and 40% ≤10 mm. False-positive rate was around 2%; higher for North Denmark Region than for the rest of Denmark. Three out of 10 breast cancers in screened women were diagnosed as interval cancers. Conclusions: High coverage by examination and low interval cancer rate are required...... for screening to decrease breast cancer mortality. Two pioneer local screening programs starting in the 1990s were followed by a decrease in breast cancer mortality of 22-25%. Coverage by examination and interval cancer rate of the national program were on the favorable side of values from the pioneer programs...... Region than in the rest of Denmrk. Detection rate was slightly below 1% at first screen, 0.6% at subsequent screens, and one region had some fluctuation over time. Ductal carcinoma in situ (DCIS) constituted 13-14% of screen-detected cancers. In subsequent rounds, 80% of screen-detected invasive cancers...

  18. Low-Wage Work in Denmark

    DEFF Research Database (Denmark)

    Westergård-Nielsen, Niels Chr.

    2008-01-01

    not stay in low-wage jobs for long. Many go on to higher paying jobs, while a significant minority ends up relying temporarily on income support and benefits sustained by one of the highest tax rates in the world.  Low-Wage Work in Denmark provides an insightful look at the particularities of the Danish...... labor market and the lessons it holds for both the United States and the rest of Europe....

  19. Anoctamin 5 muscular dystrophy in Denmark

    DEFF Research Database (Denmark)

    Witting, Nanna; Duno, Morten; Petri, Helle

    2013-01-01

    mutations caused 11 % of our total cohort of LGMD2 cases making it the second most common LGMD2 etiology in Denmark. Eight patients complained of dysphagia and 3 dated symptoms of onset in childhood. Cardiac examinations revealed increased frequency of premature ventricular contractions. Four novel putative...... of reported dysphagia is a new phenotypic feature not previously reported, and cardiac investigations revealed that ANO5-patients may have an increased risk of ventricular arrhythmia....

  20. Family Background and Educational Success in Denmark

    DEFF Research Database (Denmark)

    D. Munk, Martin; McIntoch, James

    This research examines the role of family background variables in the determination of educational attainment in Denmark. A categorical representation of the highest level of education attained is the dependent variable. It is analyzed by procedures which take account of the presence of unobserva...... procedures are in the spirit of the work of Cameron and Heckman (1998), but are more general. Econometric issues and the results of what other Scandinavian researchers in this area have found are also discussed in section 4....

  1. [Adrenalectomy in Denmark 2002-2006

    DEFF Research Database (Denmark)

    Jepsen, J.V.; Kromann-Andersen, B.; Bendixen, A.

    2008-01-01

    INTRODUCTION: Laparoscopic adrenalectomy is replacing open adrenalectomy. The advantages are reduced mortality and morbidity, and shorter postoperative hospitalisation. The organization and short-term outcomes of adrenalectomy in Denmark are largely unknown. MATERIAL AND METHODS: Extraction, review...... of adrenalectomies performed laparoscopically is growing, currently reaching about 65%. Laparoscopic adrenalectomies are only performed at departments with a high frequency of laparoscopic surgery and specialized endocrinological and anaesthesiological support. For educational and research purposes, adrenalectomy...

  2. Dietary patterns in Them and Copenhagen, Denmark

    DEFF Research Database (Denmark)

    Helms, P; Jørgensen, I M; Paerregaard, A

    1982-01-01

    Four-day weighing and 24-hour recall were used to record food consumption in groups of 30 men, aged 50-59 years, in 2 areas of Denmark: Them, a rural Danish community, and Copenhagen. Fat consumption was found to be higher in Them, whereas alcohol consumption was higher in Copenhagen. The absolut...... daily intake of dietary fiber was higher in Them than in Copenhagen. These observations document changes due to industrialization of food production, modern distribution, and marketing methods....

  3. Omnichannel Marketing. Facts & Figures. Denmark 2017

    DEFF Research Database (Denmark)

    Futtrup Kjær, Jan; Kjær Jacobsen, Christine; Bjerre Herdel, Stine

    This NBI Omnichannel Facts and Figures report highlights the central findings from the NBI Omnichannel capability benchmarking tool, based on data collected in 2015 and 2016. The insights shared here provide an understanding of the way companies and marketing departments are working to deliver...... on - and adapt to - the challenges and opportunities related to the customer-centric, omnichannel experience. View this report as a data-freeze and analysis on the status of omnichannel in Denmark as of 2017....

  4. Macroalgae - Production and Biorefining in Denmark

    DEFF Research Database (Denmark)

    Seghetta, Michele; Hou, Xiaoru; Bastianoni, Simone

    Macroalgae is a key biomass for the development of circular economy. This study analyzes the environmental sustainability of a macroalgae production and conversion system in Denmark. A brown algae model based on Laminaria digitata and Saccharina latissima is utilized as feedstock for a biorefinery...... system which produces bioethanol, fish feed and liquid fertilizers. A Life Cycle Assessment was conducted from cradle to grave; i.e. from cultivation and harvest of biomass, to the use phase of the products....

  5. Institute of Physics, University of Aarhus, Denmark

    International Nuclear Information System (INIS)

    Knudsen, H.

    1991-01-01

    This annual report published by the Institute of Physics, University of Aarhus, is for the period January 1 - December 31, 1990. The report covers current research activities and is aimed at colleagues in Denmark and abroad. The research is essentially concentrated on research highlights, atomic physics, subatomic physics and condensed matter. At the end of the report are included lists of publications, employees, guests, graduate and post-graduate students together with a list of those students who graduated during 1990. (CLS)

  6. Climate change and agriculture in Denmark

    International Nuclear Information System (INIS)

    Olesen, J.E.

    2001-01-01

    This chapter reviews the current knowledge on effects of climate change on agriculture in Denmark, and the contribution of agriculture to greenhouse gas emissions in Denmark. The chapter also considers the possibilities of Danish agriculture to adapt to changing climate and to reduce greenhouse gas emissions. The relations to other aspects of global change are discussed, including liberalisation of world markets and changes in land use. Scenarios of climate change for Denmark suggest increases in annual mean temperature of 1 to 4 deg. C by the end of the 21st century depending on socioeconomic development. Winter rainfall may increase up to 20%. This implies a wide range of possible consequences. Agricultural productivity may be expected to increase under increasing temperature and increasing CO 2 concentration. Highter temperatures will increase the risk of pests and deseases. Warming in association with increased winter rainfall will also increase the risk of nitrate leaching. Climate change may thus be expected to reinforce the current trends in Danish agriculture of declining cattle population and increasing pig and cereal production. Apart from an anticipated continued decline in total agricultural area, land use will probably not be greatly affected. The current environmental regulation in Denmark aims at reducing pesticide use and nitrogen losses from agriculture. Some of the regulations are very detailed and directly regulate farming practices in a manner that may not provide the most cost-effective mechanism under a changed climate. Some of these existing rigid frameworks for environmental regulation should thus be substituted by more flexible goal-oriented environmental protection strategies, in order to ensure sustainability of farming under global climate change. (LN)

  7. New Multifunctional Hunting Landscapes in Denmark

    DEFF Research Database (Denmark)

    Christensen, Andreas Aagaard; Svenningsen, Stig Roar; Lommer, Maria Sofie

    2014-01-01

    Between 1992 and 2008 subsidization of mandatory set aside land under the EU Common Agricultural Policy (CAP) gave rise to the establishment of a characteristic type of multifunctional hunting landscapes in Denmark, primarily located on fallow land in tilled valley bottoms. A national survey...... of their economic strategy. Implications for the ongoing discussion on land use policy concerning land sharing vs. land sparing is discussed....

  8. Experience with utility windfarms in western Denmark

    International Nuclear Information System (INIS)

    Vesterdal, J.K.

    1990-01-01

    In accordance with an agreement of December 1990 between the Danish Ministry of Energy and the Danish electricity utilities, ELSAM, a power pool serving western Denmark, is expected by the end of 1990 to be running 55 MW of wind power capacity within its service area. The situation now is: 39.4 MW wind power capacity is installed (stand-alone windmills included); 7.0 MW wind power capacity is under construction or ordered and is sure to be installed by the end of 1990; for the remaining 8.6 MW, the final approval by the authorities of two windfarm sites is still missing and installation on time therefore uncertain. The experience is gathered from seven windfarms which have been in service from six months to nearly 3 years. By the end of 1989, a total of 256 MW windpower was installed in Denmark. Of this, 197 MW was within ELSAM's service area. The wind power, of which the major part is privately owned, covered in 1989 1.5% of the power consumption in Denmark and 2% of the consumption within ELSAM's service area. (Author)

  9. Neonatal herpes in Denmark 1977-1991

    DEFF Research Database (Denmark)

    Fonnest, G; de la Fuente Fonnest, I; Weber, Tom

    1997-01-01

    BACKGROUND: To prevent neonatal herpes, women in labor with genital herpes infection are still delivered by Cesarean section. This policy is currently being debated. The aim of this study was to determine the incidence of neonatal herpes in Denmark and to evaluate the prevention practice. METHODS...... herpes recurrence. Four infants had a serious infection in spite of Cesarean section. This study does not support a policy of Cesarean section in case of maternal recurrent herpes simplex infection at delivery.......BACKGROUND: To prevent neonatal herpes, women in labor with genital herpes infection are still delivered by Cesarean section. This policy is currently being debated. The aim of this study was to determine the incidence of neonatal herpes in Denmark and to evaluate the prevention practice. METHODS......: All newborns with perinatal herpes in Denmark 1977-1991 were identified from hospital-records. RESULTS: Of 862,298 deliveries 136 possible cases were found but only 30 (22%) fulfilled the criteria for neonatal herpes. The incidence increased from 2.36 to 4.56 per 100,000 live births during 1977...

  10. The market for hospital medicine in Denmark

    Directory of Open Access Journals (Sweden)

    Gisela Hostenkamp

    2011-11-01

    Full Text Available Pharmaceutical expenditure growth has outpaced GDP and healthcare expenditure growth rates in Denmark as in most OECD countries for the last decade. A major part of this increase was due to high growth rates in specialist areas that are typically located in hospital settings. Yet the market for hospital medicines and their procurement are still poorly understood. The present paper characterises the market for hospital medicines in Denmark in terms of its organisation and developments between 2005 and 2009. In Denmark hospital medicines are publicly financed and procurement is centrally organised. 98% of all medicines administered at Danish public hospitals are purchased through a public procurement agency by means of public tenders. Using data on actual contract prices we decompose pharmaceutical expenditure growth into the contributions from newly introduced medicines, price and volume increases and use summary statistics to compare market performance in both sectors. The market for hospital medicine is more concentrated than the pharmaceutical retail sector and the share of generics and parallel imported products is significantly lower. Between 2005 and 2009 expenditures for hospital medicines more than doubled -accounting for almost 40% of the total Danish pharmaceutical market in 2009. Price increases however - although positive and higher than in the pharmaceutical retail sector - were only moderate. The majority of the expenditure growth was due to an increase in utilisation and the introduction of new medicines in the hospital sector. Centralised tendering may therefore have important implications for competition and industry structure in the long run.

  11. Properies of binder systems containing cement, fly ash, and limestone powder

    Directory of Open Access Journals (Sweden)

    Krittiya Kaewmanee

    2014-10-01

    Full Text Available Fly ash and limestone powder are two major widely available cement replacing materials in Thailand. However, the current utilization of these materials is still not optimized due to limited information on properties of multi-binder systems. This paper reports on the mechanical and durability properties of mixtures containing cement, fly ash, and limestone powder as single, binary, and ternary binder systems. The results showed that a single binder system consisting of only cement gave the best carbonation resistance. A binary binder system with fly ash exhibited superior performances in long-term compressive strength and many durability properties except carbonation and magnesium sulfate resistances, while early compressive strength of a binary binder system with limestone powder was excellent. The ternary binder system, taking the most benefit of selective cement replacing materials, yielded, though not the best, satisfactory performances in almost all properties. Thus, the optimization of binders can be achieved through a multi-binder system.

  12. A correlation of Sr isotope stratigraphy and foraminiferal biostratigraphy in tertiary limestones of Papua New Guinea

    International Nuclear Information System (INIS)

    Allan, T.L.; Trotter, J.A.; Whitford, D.J.; Korsch, M.J.

    2000-01-01

    Strontium isotopic and stratigraphic data collected from the Darai Limestone of Papua New Guinea clearly demonstrate a systematic relationship between bulk 87 Sr/ 86 Sr ratio and index foraminiferal composition that closely reflects the relative stratigraphical range of the foraminifera in this region. A graphic correlation of stratigraphic, strontium isotopic and age ranges of the major index taxa permits direct evaluation of limestone age and isotopic composition in the Darai Limestone. The age of the Tf 1 /Tf 2 boundary (∼12.2 Ma) is significantly younger than the accepted estimate of ∼15.0 Ma (plankton Zone N9) and the Te/Tf boundary (∼20.3 Ma) is older than the generally accepted age of ∼l 8.5 Ma (plankton Zone N6)

  13. A NEW DAONELLA FROM THE LADINIAN PLATFORM OF THE ESINO LIMESTONE (SOUTHERN ALPS, ITALY

    Directory of Open Access Journals (Sweden)

    CRISTIANO LARGHI

    2006-03-01

    Full Text Available The bivalve Daonella Mojsisovics, 1874 is very common in the Middle Triassic pelagic facies, whereas the record of this genus from shallow water limestones is rare. In the present paper a new species of Daonella, named D. pseudograbensis, is described from the Esino Limestone, a Ladinian (Middle Triassic carbonate platform in the central Southern Alps. The species is described from Brembana Valley, where the Esino Limestone is rather rich in bioclastic lenses yielding faunas with bivalves, cephalopods, gastropods, brachiopods, corals and calcareous algae. Daonella pseudograbensis n. sp. is based on very well preserved specimens, which are often articulated and closed, all coming from the same locality. The new species shows a narrow range of intraspecific and ontogenetic morphologic variations. It is easy distinguishable from the other species of the genus for the outline and ornamentation; it therefore differs from D. grabensis Kittl, 1912, the most similar species, for the longer anterior dorsal margin.Pdf

  14. Successful experience with limestone and other sorbents for combustion of biomass in fluid bed power boilers

    Energy Technology Data Exchange (ETDEWEB)

    Coe, D.R. [LG& E Power Systems, Inc., Irvine, CA (United States)

    1993-12-31

    This paper presents the theoretical and practical advantages of utilizing limestone and other sorbents during the combustion of various biomass fuels for the reduction of corrosion and erosion of boiler fireside tubing and refractory. Successful experiences using a small amount of limestone, dolomite, kaolin, or custom blends of aluminum and magnesium compounds in fluid bed boilers fired with biomass fuels will be discussed. Electric power boiler firing experience includes bubbling bed boilers as well as circulating fluid bed boilers in commercial service on biomass fuels. Forest sources of biomass fuels fired include wood chips, brush chips, sawmill waste wood, bark, and hog fuel. Agricultural sources of biomass fuels fired include grape vine prunings, bean straw, almond tree chips, walnut tree chips, and a variety of other agricultural waste fuels. Additionally, some urban sources of wood fuels have been commercially burned with the addition of limestone. Data presented includes qualitative and quantitative analyses of fuel, sorbent, and ash.

  15. Modelling of catalytic oxidation of NH3 and reduction of NO on limestone during sulphur capture

    DEFF Research Database (Denmark)

    Kiil, Søren; Bhatia, Suresh K.; Dam-Johansen, Kim

    1996-01-01

    activity with respect to each species involved. An existing particle model, the Grain-Micrograin Model, which simulates sulphur capture on limestone under oxidizing conditions is considered in the modelling. Simulation results in good qualitative agreement with experimental data are obtained here......A theoretical study of the complex transient system of simultaneous sulphur capture and catalytic reactions of N-containing compounds taking place on a single limestone particle is conducted. The numerical technique developed previously by the authors (Kiil et al. 1994) based on collocation...... for the catalytic chemistry of NH3 during simultaneous sulphur capture on a Stevns Chalk particle. The reduction of NO by NH3 over CaSO4 (which is the product of the reaction between SO2, O2 and limestone) was found to be important because this reaction could explain the change in selectivity with increased solid...

  16. Epilithic and endolithic bacterial communities in limestone from a Maya archaeological site.

    Science.gov (United States)

    McNamara, Christopher J; Perry, Thomas D; Bearce, Kristen A; Hernandez-Duque, Guillermo; Mitchell, Ralph

    2006-01-01

    Biodeterioration of archaeological sites and historic buildings is a major concern for conservators, archaeologists, and scientists involved in preservation of the world's cultural heritage. The Maya archaeological sites in southern Mexico, some of the most important cultural artifacts in the Western Hemisphere, are constructed of limestone. High temperature and humidity have resulted in substantial microbial growth on stone surfaces at many of the sites. Despite the porous nature of limestone and the common occurrence of endolithic microorganisms in many habitats, little is known about the microbial flora living inside the stone. We found a large endolithic bacterial community in limestone from the interior of the Maya archaeological site Ek' Balam. Analysis of 16S rDNA clones demonstrated disparate communities (endolithic: >80% Actinobacteria, Acidobacteria, and Low GC Firmicutes; epilithic: >50% Proteobacteria). The presence of differing epilithic and endolithic bacterial communities may be a significant factor for conservation of stone cultural heritage materials and quantitative prediction of carbonate weathering.

  17. Thermochemical degradation of limestone aggregate concrete on exposure to sodium fire

    International Nuclear Information System (INIS)

    Premila, M.; Sivasubramanian, K.; Amarendra, G.; Sundar, C.S.

    2008-01-01

    Limestone aggregate concrete blocks were subjected to sodium fire conforming to a realistic scenario in order to qualify them as protective sacrificial layers over structural concrete flooring in liquid metal-cooled fast breeder reactors. Mid infrared absorption measurements were carried out on these sodium fire-exposed samples as a function of depth from the affected surface. Definite signatures of thermochemical degradation indicating dehydration and structural modification of the limestone concrete have been obtained. Control runs were carried out to delineate the thermal effects of sodium fires from that of the chemical interaction effects. Measurements on limestone aggregate samples treated with fused NaOH provided direct evidence of the exact mechanism of the sodium attack on concrete. The observed degradation effects were correlated to the mechanical strength of the concrete blocks and to the intensity of the sodium fire experienced

  18. Elemental analysis of some West Malaysian limestones using neutron activation, delayed neutron and electron microprobe analysis

    International Nuclear Information System (INIS)

    Amin, Y.M.; Kamaluddin, B.; Mahat, R.H.

    1990-01-01

    Limestone stratigraphy in Malaysia has been and is dependent almost entirely in palaeontology. However fossil localities are sporadic and as such a new fossil discovery mean the necessity for a complete re-appraisal of the stratigraphy. The almost complete dependence upon palaeontology results from the difficulties of stratigraphy correlation of isolated outcrops, from the cover of tropical vegetation and from the often complex folding and faulting which has been imposed on the geosyn-clinical rocks by the Indonesian-Thai-Malayan orogeny. So by studying the elemental composition of limestones accurately, we would be able to correlate outcrops and other stratigraphic samples independent of fossil finds. The use of delayed neutron analysis would also determine the concentration of uranium and thorium accurately. This study, in conjunction with thermoluminescence and fission track studies, would able us to date the age of the limestones

  19. Industrial application of limestone deposits of kohat, NWFP: a research towards the sustainability of the deposits

    International Nuclear Information System (INIS)

    Bilqees, R.; Shah, T.

    2007-01-01

    Chemical analyses, petrographic studies and physical tests of limestone deposits in the vicinity of kohat along Bannu Road, Hangu Road and Rawalpindi Road were carried out to categorize these reserves, locality-wise, for their specified industrial uses. Limestone of kohat area was found to be generally good for construction purposes. The deposits on the Hangu Road were of good quality with more then 97% CaCO/sub 3/ and suitable for use in chemical, iron and steel industries, for glass making, soda ash manufacture etc. The deposit of Bannu Road with 96.5% CaCO/sub 3/ can be used for sugar refining, paint industry, flue gas desulphurization, animal feed etc. The limestone deposit of Rawalpindi Road is inferior in quality having 95.2% CaCO/sub 3/. It can be utilized in rubber industry, as ceramic whiting, building materials, rock wool etc. (author)

  20. Sedimentary and environmental history of the Late Permian Bonikowo Reef (Zechstein Limestone, Wuchiapingian, western Poland

    Directory of Open Access Journals (Sweden)

    Paweł Raczyński

    2017-07-01

    Full Text Available The Bonikowo Reef occurs in the central part of the Zechstein Limestone Basin in western Poland and was growing on the topmost edges of tilted blocks and/or on the top of uplifted horsts of the Brandenburg–Wolsztyn–Pogorzela High. Its size is ca. 1.6 km2. The Bonikowo Reef shows the thickest reef section (90.5 m recorded in the High. The Zechstein Limestone unit is represented mostly by limestones, often thoroughly recrystallized, although the macrotextures and biota of the boundstone are identifiable in most cases. The drillcore section is a mixture of boundstones (microbial and bryozoan, wackestones, packstones and grainstones, which often co-occur. The δ13C and δ18O values for both calcite (avg. 3.8 ± 0.8‰ and −3.4 ± 1.7‰, respectively and dolomite (avg. 3.5 ± 0.7‰ and −5.2 ± 1.3‰, respectively are transitional between the values previously reported for condensed sequences of the basinal facies and larger reef complexes. The biofacies of the Bonikowo Reef are very similar to those recognized in other reefs of the Brandenburg–Wolsztyn–Pogorzela High, which owe their origin to the destruction of bryozoan boundstones. The biota composition is typical and characteristic of other Zechstein Limestone reefs. However, the Bonikowo Reef demonstrates the importance of microbialites, laminar and nodose encrustations, in the growth and cohesion of the Zechstein Limestone reefs. Such encrustations abound within the Zechstein Limestone although, in many cases, the real nature of the encrustations is difficult to ascertain. These laminated encrustations show great similarity to Archaeolithoporella that is one of the most important Permian reef-building organisms. The encrustations considered to represent Archaeolithoporella were also previously recorded in the Zechstein Limestone of western Poland and in its stratigraphic equivalent, the Middle Magnesian Limestone of Northeast England. The lower part of the sequence shows

  1. Pliocene Te Aute limestones, New Zealand : expanding concepts for cool-water shelf carbonates

    International Nuclear Information System (INIS)

    Nelson, C.S.; Winefield, P.R.; Hood, S.D.; Caron, V.; Pallentin, A.; Kamp, P.J.J.

    2003-01-01

    Acceptance of a spectrum of warm- through cold-water shallow-marine carbonate facies has become of fundamental importance for correctly interpreting the origin and significance of all ancient platform limestones. Among other attributes, properties that have become a hallmark for characterising many Cenozoic non-tropical occurrences include: (1) the presence of common bryozoan and epifaunal bivalve skeletons; (2) a calcite-dominated mineralogy; (3) relatively thin deposits exhibiting low rates of sediment accumulation; (4) an overall destructive early diagenetic regime; and (5) that major porosity destruction and lithification occur mainly in response to chemical compaction of calcitic skeletons during moderate to deep burial. The Pliocene Te Aute limestones are non-tropical skeletal carbonates formed at paleolatitudes near 40-42 degrees S under the influence of commonly strong tidal flows along the margins of an actively deforming and differentially uplifting forearc basin seaway, immediately inboard of the convergent Pacific-Australian plate boundary off eastern North Island, New Zealand. This dynamic depositional and tectonic setting strongly influenced both the style and subsequent diagenetic evolution of the limestones. Some of the Te Aute limestones exhibit the above kinds of 'normal' non-tropical characteristics, but others do not. For example, many are barnacle and/or bivalve dominated, and several include attributes that at least superficially resemble properties of certain tropical carbonates. In this regard, a number of the limestones are infaunal bivalve rich and dominated by an aragonite over a calcite primary mineralogy, with consequently relatively high diagenetic potential. Individual limestone units are also often rather thick (e.g., up to 50-300 m), with accumulation rates from 0.2 to 0.5 m/ka, and locally as high as 1 m/ka. Moreover, there can be a remarkable array of diagenetic features in the limestones, involving grain alteration and

  2. Rapid method to determine actinides and 89/90Sr in limestone and marble samples

    International Nuclear Information System (INIS)

    Maxwell, S.L.; Culligan, Brian; Hutchison, J.B.; Utsey, R.C.; Sudowe, Ralf; McAlister, D.R.

    2016-01-01

    A new method for the determination of actinides and radiostrontium in limestone and marble samples has been developed that utilizes a rapid sodium hydroxide fusion to digest the sample. Following rapid pre-concentration steps to remove sample matrix interferences, the actinides and 89 / 90 Sr are separated using extraction chromatographic resins and measured radiometrically. The advantages of sodium hydroxide fusion versus other fusion techniques will be discussed. This approach has a sample preparation time for limestone and marble samples of <4 h. (author)

  3. Improvement of operational properties of shell limestone building materials by polysulfide solution impregnation

    Directory of Open Access Journals (Sweden)

    MASSALIMOV Ismail Alexandrovich

    2017-06-01

    Full Text Available The data of studies on the effectiveness of impregnation with polysulfide solutions of shell limestone used as facing and wall material, as well as for the manufacture of road products are presented. Modification of the limestone with the impregnating composition «Akvastat» created by the authors which is sulfur-containing water-based solution of calcium polysulfide containing alcohols and surfactants, can significantly reduce water absorption and increase durability of limestone. Impregnating composition on the basis of calcium polysulfide possesses density of 1.22–1.24 g/cm3, the infiltrant penetrates into the pore structure of limestone to a depth of 4 cm or more, depending on the density and structure of the sample. While the material is drying, sulfur nanoparticles are crystallized from the polysulfide solution in its pores. They partially fill pore space and form protective durable insoluble hydrophobic coating that impedes the penetration of water into the pores of the limestone, but preserves its vapor permeability, which is important for wall and decoration materials. The evaluation of protective coatings was performed with laser particle size analyzer, scanning probe microscope and a diffractometer. It showed that the average size of the particles forming the protective coating is in the range of 20–25 nm, the particles shape is spherical, the particles are elemental sulfur with orthorhombic structure of the crystal lattice. The processing of shell limestone with calcium polysulphide solution provides formation of coating based on nanosized sulfur on the surface of stone pores. The coating partially fills the pore space and, as it is hydrophobic, reduces the water absorption of the samples by a factor of 5–8, increases their average density by 22–27%, strength in 1,2–1,3 times, the softening factor by 6–19%, that makes possible to predict the increase of the durability of building materials based on shell limestone to 1

  4. Performance of japanese quails fed feeds containing different corn and limestone particle sizes

    OpenAIRE

    Berto,DA; Garcia,EA; Móri,C; Faitarone,ABG; Pelícia,K; Molino,AB

    2007-01-01

    This study aimed at evaluating performance and egg quality of Japanese quails fed feeds containing different corn and limestone particle sizes. A total number of 648 birds in the peak of production was distributed in a random complete block experimental design, using a 2x3 factorial arrangement (2 corn particle sizes and 3 limestone particle sizes). Birds were designated to one of two blocks, with six replicates of 18 birds each. Mean geometric diameter (MGD) values used were 0.617mm and 0.72...

  5. Hydration of Blended Portland Cements Containing Calcium-Aluminosilicate Glass Powder and Limestone

    DEFF Research Database (Denmark)

    Moesgaard, M; Poulsen, Søren Lundsted; Herfort, D

    2012-01-01

    M. MOESGAARD, S.L. POULSEN, D. HERFORT, M. STEENBERG, L.F. KIRKEGAARD, J. SKIBSTED, Y. YUE, Hydration of Blended Portland Cements Containing Calcium-Aluminosilicate Glass Powder and Limestone, Journal of the American Ceramic Society 95, 403 – 409 (2012).......M. MOESGAARD, S.L. POULSEN, D. HERFORT, M. STEENBERG, L.F. KIRKEGAARD, J. SKIBSTED, Y. YUE, Hydration of Blended Portland Cements Containing Calcium-Aluminosilicate Glass Powder and Limestone, Journal of the American Ceramic Society 95, 403 – 409 (2012)....

  6. Differences between silica and limestone concretes that may affect their interaction with corium

    International Nuclear Information System (INIS)

    Journeau, C.; Haquet, J. F.; Piluso, P.; Bonnet, J. M.

    2008-01-01

    Recent Molten Core Concrete Interaction tests performed at Argonne National Laboratory and at CEA Cadarache have shown that, whereas the ablation of limestone-rich concretes is almost isotropic, the ablation of silica-rich concretes is much faster towards the sides than towards the bottom of the cavity. The following differences exists between limestone-rich and silica-rich concretes: limestone concretes liberate about twice as much gas, at a given ablation rate than siliceous concretes (more than 50% more at constant heat flux) and this can affect pool hydraulics and crust stability: limestone concrete has a higher liquidus temperature than siliceous concrete and molten limestone concrete has a larger diffusion coefficient and can more easily dissolve a corium crust than siliceous melt; limestone aggregates are destroyed by de-carbonation at around 1000 K while silica aggregates melt only above 2000 K, so that floating silica aggregates can form cold spots increasing corium solidification near the interface; de-carbonation of limestone leads to a significant shrinkage of concrete melt volume compared to the cold solid that hampers the mechanical stability of overlying crusts; the chemical composition of molten mortar (sand + cement) and concrete (sand + gravel + cement) is close for limestone-rich concretes while it is different for siliceous concretes, so that the melt composition may vary significantly in case of non-simultaneous melting of the siliceous concrete constituents; molten silicates have a large viscosity, so that transport properties are different for the two types of concretes. The small range of plant concrete compositions that have been considered for MCCI experiments has not yet been found sufficient to determine which of the above-mentioned differences is paramount to explain the observed difference in ablation patterns. Separate Effect Tests using specially-designed 'artificial concretes' and prototypic corium would provide the necessary

  7. Carbonate Minerals with Magnesium in Triassic Terebratula Limestone in the Term of Limestone with Magnesium Application as a Sorbent in Desulfurization of Flue Gases

    Science.gov (United States)

    Stanienda-Pilecki, Katarzyna

    2017-09-01

    This article presents the results of studies of Triassic (Muschelkalk) carbonate rock samples of the Terebratula Beds taken from the area of the Polish part of the Germanic Basin. It is the area of Opole Silesia. The rocks were studied in the term of possibility of limestone with magnesium application in desulfurization of flue gases executed in power plants. Characteristic features of especially carbonate phases including magnesium-low-Mg calcite, high-Mg calcite, dolomite and huntite were presented in the article. They were studied to show that the presence of carbonate phases with magnesium, especially high-Mg calcite makes the desulfurization process more effective. Selected rock samples were examined using a microscope with polarized, transmitted light, X-ray diffraction, microprobe measurements and FTIR spectroscopy. The results of studies show a domination of low magnesium calcite in the limestones of the Terebratula Beds. In some samples dolomite and lower amounts of high-Mg calcite occurred. Moreover, huntite was identified. The studies were very important, because carbonate phases like high-Mg calcite and huntite which occurred in rocks of the Triassic Terebratula Beds were not investigated in details by other scientists but they presence in limestone sorbent could influence the effectiveness of desulfurization process.

  8. Diagenetic evolution and stable isotopes of Lower Permian platform marginal carbonates (Trogkofel Limestone, Carnic Alps, Austria)

    Science.gov (United States)

    Schaffhauser, Maria; Krainer, Karl; Sanders, Diethard Gerald; Spötl, Christoph

    2010-05-01

    The Trogkofel massif in the Carnic Alps, Austria/Italy, consists of a succession up to 400 m thick of limestones deposited along a platform margin (Trogkofel Limestone; Artinskian). The top of the Trogkofel Limestone is erosively overlain by the Tarvis Breccia. Up-section, the Trogkofel Limestone consists of well-bedded shallow-water bioclastic limestones with intercalated mud mounds, overlain by thick-bedded to unbedded limestones (bioclastic grainstones, packstones, rudstones) and cementstone mounds rich in phylloid algae, Tubiphytes, bryozoans and Archaeolithoporella. In the cementstone mounds, bioclasts are coated by thick fringes and botryoids of fibrous calcite, and of calcite spar that probably represents calcitized aragonite. Primary and intrinsic pores are filled by microbialite, and/or by mudstone to bioclastic wackestone. Shallow-water bioclastic grainstones are cemented by isopachous fringes of fibrous calcite, or by sparry calcite. Throughout the succession, evidence for meteoric-vadose dissolution is present. The Trogkofel Limestone is riddled by palaeokarstic dykes and caverns filled by (a) isopachous cement fringes up to a few decimetres thick, and/or (b) by red, geopetally-laminated lime mudstone to bio-lithoclastic wackestone; geopetal laminasets locally display convolute bedding. Small dissolution cavities are filled by grey internal sediment, or by crystal silt. Brecciated internal sediments overlain by unbrecciated, geopetally-laminated infillings record deformation during or after deposition of the Trogkofel Limestone. Polyphase fractures cemented by calcite may cross-cut both internal sediments and host rock. In the Trogkofel Limestone, local dolomitization is common. Replacement dolomites show a wide range of shapes and fabrics, including: (a) fine-crystalline anhedral xenotopic fabric, (b) coarse-crystalline subhedral to euhedral, hypidiotopic to idiotopic fabric of turbid or optically zoned crystals, and (c) saddle dolomite as replacement

  9. Submarine terrace limestones from the continental slope off Saurashtra-Bombay: Evidence of Late Quaternary neotectonic activity

    Digital Repository Service at National Institute of Oceanography (India)

    Rao, V.P.; Veerayya, M.

    cements occur as isopachous crusts. Dissolution and clotting of aragonite needles and drusy calcite in the interstices indicate cementation of the limestones at inter-tidal conditions. The age of the limestones is 11,900 years BP. These imply that the 130...

  10. Replacement of Eocene white sandy limestone in historical buildings : over 100 years of practice in the Netherlands

    NARCIS (Netherlands)

    Quist, W.J.; Nijland, T.G.; Hees, R.P.J. van

    2013-01-01

    This paper discusses the replacement of white sandy limestone (Gobertange and Lede or Balegem) in the Netherlands in (successive) restorations from the mid-19th century onwards. White sandy limestone, transported from the southern part of the Low Countries (now Belgium), was extensively used in the

  11. Lithofacies and petrophysical properties of Portland Base Bed and Portland Whit Bed limestone as related to durability

    NARCIS (Netherlands)

    Dubelaar, C.W.; Engering, S.; Hees, R.P.J. van; Koch, R.; Lorenz, H.G.

    2003-01-01

    This study focuses on the differences in lithofacies and petrophysical properties of Base Bed and Whit Bed Portland limestone and the presumed relationships between these characteristics and the durability of this building stone. As Portland limestone probably will be used as a stone for several

  12. Lithofacies and Petrophysical Properties of Portland Base Bed and Portland Whit Bed Limestone as Related to Durability

    NARCIS (Netherlands)

    Dubelaar, C.W.; Engering, S.; Van Hees, R.P.J.; Koch, R.; Lorenz, H.G.

    2003-01-01

    This study focuses on the differences in lithofacies and petrophysical properties of Base Bed and Whit Bed Portland limestone and the presumed relationships between these characteristics and the durability of this building stone. As Portland limestone probably will be used as a stone for several

  13. High-temperature CO2 capture cycles of hydrated limestone prepared with aluminum (hydr)oxides derived from kaolin

    International Nuclear Information System (INIS)

    Wang, Ke; Zhao, Pengfei; Guo, Xin; Han, Dongtai; Chao, Yang

    2014-01-01

    Highlights: • Hydrated limestone exhibited a higher reactivity and stability. • Microstructure of hydrated limestone was significantly improved. • Hydrated limestone still suffered less loss-incapacity. • Hydrated limestone sorbents with kaolin-based binders were prepared and characterized. • Sorbents prepared from hydrated limestone and Al(OH) 3 binder are a promising sorbent. - Abstract: A simple and convenient process was used to improve the utilization of natural limestone and kaolin for calcium looping technology and environmental applications. The calcined natural limestone modified with the distilled water (denoted as Limestone-W), was systematically studied and compared with the other CaO sorbents (calcium acetate, calcium D-gluconate and calcined natural limestone). These CaO-based sorbents were tested for their CO 2 capture behavior through 20 carbonation/calcination cycles in a thermo-gravimetric analyzer (TGA). Their morphology, pore structure and phase composition before and after carbonation/calcination cycles were determined by scanning electron microscopy, nitrogen adsorption, and X-ray diffraction. The first-cycle and multicycle sorption results revealed that the Limestone-W sorbent exhibited a relatively faster reaction rate and higher cyclic CO 2 capture. The characterization data indicated that the Limestone-W was composed of a special calcium oxide structure with lower crystalline and higher porosity nanoparticles, which appeared to be the main reasons for its higher CO 2 capture capability. However, the Limestone-W still suffered loss of reactivity, even though it was less pronounced than the other CaO sorbent. To avoid this unfavorable effect, a thermally stable inert material (aluminum hydroxide derived from kaolin) was incorporated into the Limestone-W structure. This new sorbent revealed higher stability because the formation of a stable framework of Ca 12 Al 14 O 33 particles hindered densification and sintering of the CaO phase

  14. Lightweight concrete with Algerian limestone dust. Part II: study on 50% and 100% replacement to normal aggregate at timely age

    Directory of Open Access Journals (Sweden)

    S. Kitouni

    2015-12-01

    Full Text Available Abstract A control lightweight concrete (LWC mixture made with 50% and 100% of limestone as a replacement of coarse aggregates in weight was prepared. Limestone is used for economical and environmental concern. The concrete samples were cured at 65% relative humidity at 20 ºC. The compressive and flexural tensile strengths, elastic modulus and Poisson's ratio of hardened concrete were measured. Laboratory compressive and tensile strength tests results showed that LWC can be produced by the use of limestone. The aim of this study is twofold: one is to design a lightweight concrete with the use of limestone that will provide an advantage of reduction in dead weight of a structure; and second is to obtain a more economical LWC mixture with the use of limestone.

  15. GPR Use and Activities in Denmark

    Science.gov (United States)

    Ringgaard, Jørgen; Wisén, Roger

    2014-05-01

    Academic work on GPR in Denmark is performed both by the Technical University of Denmark (DTU) and the University of Copenhagen (KU). The work at DTU includes development of antennas and systems, e.g. an airborne ice-sounder GPR system (POLARIS) that today is in frequent use for monitoring of ice thickness in Greenland. DTU often collaborates with ESA (European Space Agency) regarding electromagnetic development projects. At KU there is an ongoing work with GPR applied to water resources. The main objective is to study flux of water and matter across different hydrological domains. There are several recent publications from KU describing research for data analysis and modelling as well as hydro geophysical applications. Also the Geological Survey of Denmark and Greenland (GEUS) performs frequent geological mapping with GPR. There have been mainly two actors on the Danish commercial market for several years: FalkGeo and Ramboll. Falkgeo has been active for many years acquiring data for several different applications such as archeology, utilities and roads. Their equipment pool comprises both a multichannel Terravision system form GSSI and a 2D system from Mala Geoscience with a comprehensive range of antennas. Ramboll has performed GPR surveys for two decades mainly with 2D systems from GSSI. In recent years Ramboll has also obtained a system with RTA antennas from Mala Geoscience and a multichannel system from 3D-Radar. These systems have opened markets both for deeper geological mapping and for shallow mapping. The geological mapping with the Mala system has often been combined with resistivity imaging (CVES) and refraction seismic. The 3D system has been applied in airports and on road for mapping of layer thicknesses, delamination and for control of asphalt works. Other areas comprise bridge deck evaluation and utility mapping. Ramboll also acts as client advisor for BaneDanmark, a state owned company who operates and develops the Danish state railway network

  16. Influence of limestone fillers on combustion characteristics of asphalt mortar for pavements

    DEFF Research Database (Denmark)

    Ke, Wu; Kai, Zhu; Wu, Hao

    2014-01-01

    Asphalt materials will be ignited and release significant toxic fumes within tunnel fires. Thus, combustion characteristics of asphalt materials used in road tunnel should be studied in order to limit such an adverse effect. In the present work we study the influence of limestone fillers on combu...

  17. Model of fragmentation of limestone particles during thermal shock and calcination in fluidised beds

    Energy Technology Data Exchange (ETDEWEB)

    Saastamoinen, J.; Pikkarainen, T.; Tourunen, A.; Rasanen, M.; Jantti, T. [VTT Technical Research Center, Jyvaskyla (Finland)

    2008-11-15

    Fragmentation of limestone due to thermal shock and calcination in a fluidised bed was studied through experiments and modelling. The time for heating was estimated by model calculations and the time for calcination by measurements. Fragmentation due to thermal shock was carried out by experiments in a CO{sub 2} atmosphere in order to prevent the effect of calcination. It was found to be much less than fragmentation due to calcination. Average particle sizes before and after fragmentation are presented for several types of limestone. The effects of particle size and gas composition on the primary fragmentation were studied through experiments. Increasing the fluidisation velocity increased the tendency to fragment. The evolution of the particle size distribution (PSD) of limestone particles due to thermal shock and during calcination (or simultaneous calcination and sulphation) were calculated using a population balance model. Fragmentation due to thermal shock is treated as an instantaneous process. The fragmentation frequency during calcination is presented as exponentially decaying over time. In addition to the final PSD, this model also predicts the PSD during the calcination process. The fragmentation was practically found to end after 10 min. Furthermore. a population balance method to calculate the particle size distribution and amount of limestone in fluidised beds in dynamic and steady state, when feeding history is known, is presented.

  18. Limestone particle attrition and size distribution in a small circulating fluidized bed

    Energy Technology Data Exchange (ETDEWEB)

    Zhongxiang Chen; John R. Grace; C. Jim Lim [University of British Columbia, Vancouver, BC (Canada). Department of Chemical and Biological Engineering

    2008-06-15

    Limestone particle attrition was investigated in a small circulating fluidized bed reactor at temperatures from 25 to 850{sup o}C, 1 atm pressure and superficial gas velocities from 4.8 to 6.2 m/s. The effects of operating time, superficial gas velocity and temperature were studied with fresh limestone. No calcination or sulfation occurred at temperatures {le} 580{sup o}C, whereas calcination and sulfation affected attrition at 850{sup o}C. Increasing the temperature (while maintaining the same superficial gas velocity) reduced attrition if there was negligible calcination. Attrition was high initially, but after about 24 h, the rate of mass change became constant. The ratio of initial mean particle diameter to that at later times increased linearly with time and with (U{sub g} - U{sub mf}){sup 2}, while decreasing exponentially with temperature, with an activation energy for fresh limestone of -4.3 kJ/mol. The attrition followed Rittinger's surface theory. The change of surface area of limestone particles was proportional to the total excess kinetic energy consumed and to the total attrition time, whereas the change of surface area decreased exponentially with increasing temperature. At 850{sup o}C, the attrition rate of calcined lime was highest, whereas the attrition rate was lowest for sulfated particles. When online impact attrition was introduced, the attrition rate was about an order of magnitude higher than without impacts. 25 refs., 14 figs., 4 tabs.

  19. Performance Monitoring: Evaluating an Organic Carbon-Limestone PRB for Treatment of Heavy Metals and Acidity

    Science.gov (United States)

    Since 2004, researchers from the U.S. EPA National Risk Management Research Laboratory (NRMRL) have annually evaluated performance of an organic carbon-limestone permeable reactive barrier (PRB) system installed in 2003 by EPA Region 6 at the Delatte Metals Superfund site in Ponc...

  20. Attrition of limestones by impact loading in fluidized beds: The influence of reaction conditions

    Energy Technology Data Exchange (ETDEWEB)

    Scala, Fabrizio [Istituto di Ricerche sulla Combustione, Consiglio Nazionale delle Ricerche, Napoli (Italy); Salatino, Piero [Istituto di Ricerche sulla Combustione, Consiglio Nazionale delle Ricerche, Napoli (Italy); Dipartimento di Ingegneria Chimica, Universita degli Studi di Napoli Federico II, Napoli (Italy)

    2010-09-15

    The extent of attrition associated with impact loading was studied for five different limestones pre-processed in fluidized bed under different reaction conditions. The experimental procedure was based on the measurement of the amount and the particle size distribution of the debris generated upon impact of sorbent samples against a target at velocities between 10 and 45 m/s. The effect of calcination, sulfation and calcination/re-carbonation on impact damage was assessed. Fragmentation by impact loading of the limestones was significant and increased with the impact velocity. Lime samples displayed the largest propensity to undergo impact damage, followed by sulfated, re-carbonated and raw limestones. Fragmentation of the sulfated samples followed a pattern typical of the failure of brittle materials. On the other hand, the behaviour of lime samples better conformed to a disintegration failure mode, with extensive generation of very fine fragments. Raw limestone and re-carbonated lime samples followed either of the two patterns depending on the sorbent nature. The extent of particle fragmentation increased after multiple impacts, but the incremental amount of fragments generated upon one impact decreased with the number of successive impacts. (author)

  1. Optimization of nanolime solvent for the consolidation of coarse porous limestone

    Science.gov (United States)

    Borsoi, Giovanni; Lubelli, Barbara; van Hees, Rob; Veiga, Rosário; Silva, António Santos

    2016-09-01

    The potentialities of nanomaterials for application in the field of conservation have been widely investigated in the last two decades. Among nanomaterials, nanolimes, i.e., dispersions of lime nanoparticles in alcohols are promising consolidating products for calcareous materials. Nanolimes are effective in recovering the very superficial loss of cohesion of decayed materials, but they do not always provide sufficient mass consolidation. This limitation is mainly related to the deposition of the nanoparticles nearby the surface of the material. Experimental research has been set up with the aim of improving the in-depth deposition of lime nanoparticles. Previous research by the authors has shown that nanolime deposition within a substrate can be controlled by adapting the nanolimes properties (kinetic stability and evaporation rate) to the moisture transport behavior of the substrate. Nanolime properties can be modified by the use of different solvents. In this research, nanolime dispersions have been further optimized for application on Maastricht limestone, a coarse porous limestone. Firstly, nanolimes were synthesized and dispersed in ethanol and/or water, both pure and mixed in different percentages. Subsequently, based on the kinetic stability of the nanolime dispersions, the most promising solvent mixtures were selected and applied on the limestone. The deposition of lime nanoparticles within the limestone was studied by phenolphthalein test, optical microscopy and scanning electron microscopy. The results confirm that nanolime dispersed in a mixture of ethanol (95 %) and water (5 %) can guarantee a better nanoparticles in-depth deposition within coarse porous substrates, when compared to dispersions in pure ethanol.

  2. Use of limestone obtained from waste of the mussel cannery industry for the production of mortars

    International Nuclear Information System (INIS)

    Ballester, Paloma; Marmol, Isabel; Morales, Julian; Sanchez, Luis

    2007-01-01

    Various types of cement-SiO 2 -CaCO 3 mortar were prepared by replacing quarry limestone aggregate with limestone obtained as a by-product from waste of the mussel cannery industry. The CaCO 3 aggregate consists mainly of elongated prismatic particles less than 4 μm long rather than of the rounded particles of smaller size (2-6 μm) obtained with quarry limestone. The mechanical and structural properties of the mortars were found to be influenced by aggregate morphology. Setting of the different types of mortar after variable curing times was evaluated by scanning electron microscopy (SEM), thermogravimetric analysis (TG) and mercury intrusion porosimetry (MIP) techniques. Mortars with a high content in mussel shell limestone exhibited a more packed microstructure, which facilitates setting of cement and results in improved mortar strength. The enhanced mechanical properties of the new mortars allow the cement content in the final mortar composition to be decreased and production costs to be reduced as a result

  3. Conceptualization of flow and transport in a limestone aquifer by multiple dedicated hydraulic and tracer tests

    DEFF Research Database (Denmark)

    Mosthaf, Klaus; Brauns, Bentje; Fjordbøge, Annika Sidelmann

    2018-01-01

    Limestone aquifers are of great interest as a drinking water resource in many countries. They often have a complex crushed and fractured geology, which makes the analysis and description of flow and transport processes in such aquifers a challenging task. In this study, the solute transport behav...

  4. Lateral capacity of rock sockets in limestone under cyclic and repeated loading.

    Science.gov (United States)

    2010-08-01

    This report contains the results from full scale lateral load testing of two short rock socketed shafts in : limestone, and the development of recommendations for p-y analysis using those results. Two short shafts 42 : inches in diameter were constru...

  5. Effects of limestone petrography and calcite microstructure on OPC clinker raw meals burnability

    Science.gov (United States)

    Galimberti, Matteo; Marinoni, Nicoletta; Della Porta, Giovanna; Marchi, Maurizio; Dapiaggi, Monica

    2017-10-01

    Limestone represents the main raw material for ordinary Portland cement clinker production. In this study eight natural limestones from different geological environments were chosen to prepare raw meals for clinker manufacturing, aiming to define a parameter controlling the burnability. First, limestones were characterized by X-Ray Fluorescence, X-Ray Powder Diffraction and Optical Microscopy to assess their suitability for clinker production and their petrographic features. The average domains size and the microstrain of calcite were also determined by X-Ray Powder Diffraction line profile analysis. Then, each limestone was admixed with clay minerals to achieve the adequate chemical composition for clinker production. Raw meals were thermally threated at seven different temperatures, from 1000 to 1450 °C, to evaluate their behaviour on heating by ex situ X-Ray Powder Diffraction and to observe the final clinker morphology by Scanning Electron Microscopy. Results indicate the calcite microstrain is a reliable parameter to predict the burnability of the raw meals, in terms of calcium silicates growth and lime consumption. In particular, mixtures prepared starting from high-strained calcite exhibit a better burnability. Later, when the melt appears this correlation vanishes; however differences in the early burnability still reflect on the final clinker composition and texture.

  6. An experimental study on the primary fragmentation and attrition of limestones in a fluidized bed

    International Nuclear Information System (INIS)

    Yao, Xuan; Zhang, Hai; Yang, Hairui; Liu, Qing; Wang, Jinwei; Yue, Guangxi

    2010-01-01

    In this paper, an experimental study on the primary fragmentation and attrition of 5 limestones in a fluidized bed was conducted. The intensity of fragmentation and attrition were measured in the same apparatus but at different fluidizing velocities. It was found that the averaged size of the particles decreased by about 10-20% during the fragmentation process. The important factors for particle comminution include limestone types, heating rate, calcination condition and ambient CO 2 concentration. Fragmentation mainly occurred in the first a few minutes in the fluidized bed and it was more intense than that in the muffle furnace at the same temperature. The original size effect was ambiguous, depending on the limestone type. The comminution caused by attrition mainly occurred during calcination process rather than sulphation process. The sulphation process was fragmentation and attrition resisted. The attrition rate of sulphate was similar to that of lime in trend, decaying exponentially with time, but was one-magnitude-order smaller than that of lime. Present experimental results indicate that fragmentation mechanism of the limestone is dominated by CO 2 release instead of thermal stress. (author)

  7. Piedramuelle Limestone in the building heritage of Oviedo, Spain, and adjacent towns.

    Science.gov (United States)

    Cardenes Van den Eynde, Victor; Mateos, Felix Javier; Valdeon, Luis; Rojo, Araceli

    2017-04-01

    The Piedramuelle limestone has a very important representation in the building heritage of Oviedo, historical capital of Asturias (Spain) and surrounding towns. This argillaceous limestone has been quarried since the High Middle Ages until the beginning of the XX century. The main mineralogical components are carbonates (mainly calcite and sometimes ankerite, 70-90%), quartz (5-15%), terrigenous minerals (6-15%) and iron oxides (blocks and ashlars of the buildings. Some of the buildings constructed with Piedramuelle limestone are the Cathedral, the Old University and the Palaces from the XVII and XVIII centuries. The ambiance and historical architecture of Oviedo and adjacent towns is closely linked with the textures and colors of this stone. Nowadays, the Piedramuelle limestone is not exploited anymore, being the quarries exhausted. This represents an issue from a conservation point of view, since there is not a suitable stone for replacement. In order to preserve and maintain the building heritage of these towns, it is very important to prospect and protect the remaining outcrops still able to supply this characteristic stone.

  8. Effects of phosphate limestone on structure and quality under sugarcane vertisoles

    Directory of Open Access Journals (Sweden)

    Pedro Cairo Cairo

    2017-10-01

    Full Text Available The work was developed in sugarcane areas of cuban vertisols of the north coast of the province of Villa Clara municipality of Sagua la Grande, with the aim of evaluating the effectiveness of phosphate limestone and their combinations with fertilizers and organic manure on the structure and quality of vertisols under sugarcane cultivation. An experiment with phosphate limestone levels and combinations with organic manure (compost, filter cake and fertilizers (NPK was carried out on a wasstrip-block design. A soil analysis was performedat the depth of 0-20 and 20 -40 cm 36 months after the application of treatments. Organic matter, stable aggregates, factor structure, permeability, T value, exchangeable cations, index soil quality and productivity of sugarcane were evaluated. Phosphate limestone and there combinations with organic manures manifested significant effects on soil structure both in the surface layer and subsurface with residual impact over time to 36 months. The results show the close relationship between phosphate limestone and there combinations with organic manures on soil quality index additive, yield of sugarcane and economic impact.

  9. Thermal effects induced by laser ablation in non-homogeneous limestone covered by an impurity layer

    Science.gov (United States)

    Cocean, Alexandru; Pelin, Vasile; Cazacu, Marius Mihai; Cocean, Iuliana; Sandu, Ion; Gurlui, Silviu; Iacomi, Felicia

    2017-12-01

    This paper reports preliminary results concerning thermal effects induced by urban/industrial air pollutants deposited on a limestone rock when heated by pulsed laser in the cleaning process. The process of laser cleaning treatment of the crust is simulated using COMSOL Multiphysics 4.4, finite element analysis software. Scanning Electron Microscopy coupled with Energy Dispersive X-ray Spectroscopy and Laser Induced Breakdown Spectroscopy techniques have been used to analyze the chemical composition of the samples. Two elements found as being present into the dust and in the crust, such as iron and magnesium particles are used for simulation in COMSOL. Therefore, the profiles heat evolutions on the crust surface and inside limestone are obtained as thermal interactions between the three components (iron, magnesium and limestone), simulating the non-homogeneous materials. It has been observed that iron impurities caused by the dust deposition may damage the limestone through a process of overheating, as a consequence of a high thermal conduction phenomenon, recorded for the region with iron impurities and sizes of micrometric order are localized. The thermal contact between the three components results in plots that reflect their thermal interactions.

  10. Radiological significance of Egyptian limestone and alabaster used for construction of dwellings

    International Nuclear Information System (INIS)

    El-Taher, A.; Makhluf, V.

    2011-01-01

    The natural radionuclides in limestone and alabaster found in Assuit Governorate in Upper Egypt have been investigated by passive gamma-ray spectrometry. From the measured γ-ray spectra, specific activities were determined. The measured activity concentrations for these natural radionuclides were compared with the reported data from other countries. The radiation hazard parameters related to the exposure of limestone and alabaster have also been calculated. The obtained results of radium equivalent Raeq, level index Iγr, the external hazard index H ex and absorbed dose rate in limestone (90.44, 0.63, 0.17, 39.94) and (70.86, 0.50, 0.13, 31.55) are lower than the acceptable level 370 Bqkg -1 for radium equivalent Ra eq , 1 for level index Iγr, the external hazard index H e≤ I and 59 (nGy.h -1 ) for absorbed dose rate. So limestone and alabaster can be used as building construction without exceeding the proposed radioactivity criterion level. (author)

  11. 230Th/234U dating of coral limestones and vertical uplift at Djibouti

    International Nuclear Information System (INIS)

    Faure, Hugues; Hoang, C.T.; Lalou, Claude

    1980-01-01

    Coral limestones sampled from marine terraces along the Afar coast have been dated by the 230 Th/ 234 U method. The ages confirm the stratigraphic unity of these formations and the existence of the paleo sea level dated 124 000 years ago in this region. These results permit to deduce the uplift rates of this littoral [fr

  12. Treatment Of Metal-Mine Effluents By Limestone Neutralization And Calcite Co-Precipitation

    Science.gov (United States)

    The U.S. Geological Survey - Leetown Science Center and the Colorado School of Mines have developed a remediation process for the treatment of metals in circumneutral mining influenced waters. The process involves treatment with a pulsed limestone bed (PLB) system, followed by c...

  13. Treatment Of Metal-Mine Effluents By Limestone Neutralization And Calcite Co-Precipitation (Presentation)

    Science.gov (United States)

    The U.S. Geological Survey - Leetown Science Center and the Colorado School of Mines have developed a remediation process for the treatment of metals in circumneutral mining influenced waters. The process involves treatment with a pulsed limestone bed (PLB) system, followed by c...

  14. Limestone amendments and the establishment of legumes on pyritic colliery spoil

    Energy Technology Data Exchange (ETDEWEB)

    Jefferies, R A

    1981-11-01

    This paper examines the effect of high liming, using two commercially available limestone grades of different particle size distributions, on the establishment of six contrasting legume species, in order to determine whether other legume species are more tolerant of the conditions imposed by high liming, and whether the effect can be avoided. 13 refs.

  15. Autogenous and drying shrinkage of sodium carbonate activated slag altered by limestone powder incorporation

    NARCIS (Netherlands)

    Yuan, B.; Yu, Q.L.; Dainese, E.; Brouwers, H.J.H.

    2017-01-01

    This paper aims to study the shrinkage mechanism of sodium carbonate activated slag containing limestone powder (LP). The workability, pore structure, reaction kinetics and strength development were characterized. The results show that the autogenous shrinkage increases when the dosage of LP is low

  16. Assessing the chemical involvement of limestone powder in sodium carbonate activated slag

    NARCIS (Netherlands)

    Yuan, B.; Yu, Q.; Brouwers, H.J.H.

    2017-01-01

    This study aims to investigate the effect of limestone powder (LP) on the reaction of sodium carbonate activated slag. The results show that the incorporated LP up to 30% improves the strength development, especially at advanced curing ages. A slightly accelerated reaction is observed for samples

  17. Influence of limestone powder on the reaction kinetics and mechanical properties of sodium carbonate activated slag

    NARCIS (Netherlands)

    Yuan, B.; Yu, Q.; Brouwers, H.J.H.

    2016-01-01

    The effects of limestone powder (LP) on the performance of Portland cement based composites have been extensively studied, considering that LP not only acts as nuclei sites, but that it is also chemically involved in the hydration process, which improves the reaction degree at the early age. In high

  18. Transient Catalytic Activity of Calcined Dolomitic Limestone in a Fluidized Bed during Gasification of Woody Biomass.

    Czech Academy of Sciences Publication Activity Database

    Pohořelý, Michael; Jeremiáš, Michal; Skoblia, S.; Beňo, Z.; Šyc, Michal; Svoboda, Karel

    2016-01-01

    Roč. 30, č. 5 (2016), s. 4065-4071 ISSN 0887-0624 R&D Projects: GA ČR GC14-09692J Institutional support: RVO:67985858 Keywords : fluidized- bed gasification * woody biomass * limestone Subject RIV: CI - Industrial Chemistry, Chemical Engineering Impact factor: 3.091, year: 2016

  19. Hydrobiogeochemical interactions in 'anoxic' limestone drains for neutralization of acidic mine drainage

    Science.gov (United States)

    Robbins, E.I.; Cravotta, C.A.; Savela, C.E.; Nord, G.L.

    1999-01-01

    Processes affecting neutralization of acidic coal mine drainage were evaluated within 'anoxic' limestone drains (ALDs). Influents had pH???3.5 and dissolved oxygen treatment step is indicated to promote Al removal before diverting acidic mine water into alkalinity-producing materials. ?? 1998 Elsevier Science Ltd.

  20. Extensive yellow crusts below limestone overhangs: a new taxon close to a minute epiphytic lichen

    Czech Academy of Sciences Publication Activity Database

    Vondrák, Jan; Moniri, M. H.; Malíček, Jiří; Košnar, J.

    2017-01-01

    Roč. 35, č. 3 (2017), s. 368-376 ISSN 0107-055X Institutional support: RVO:67985939 Keywords : Caloplaca substerilis * limestone rocks * Central Europe Subject RIV: EF - Botanics OBOR OECD: Plant sciences, botany Impact factor: 0.847, year: 2016

  1. Effect of Limestone Powder on Acid Attack Characteristics of Cement Pastes

    Directory of Open Access Journals (Sweden)

    Shuhua LIU

    2014-12-01

    Full Text Available The acid resistance of cement pastes containing limestone powder with two different water-binder (w/b ratios exposed to acetic (pH = 4 and sulfuric acid (pH = 2 solutions respectively were investigated in this paper. Limestone powder, fly ash and silica fume were also added to the cement paste mixture at different proportions. Static and flowing aqueous environments were set in this experiment. Strength and microstructure of the pastes after acid attack were investigated by using strength test, X-ray diffractometer (XRD and scanning electron microscopy (SEM. The experimental results show that the erosion degree depends not only on pH value of the solution and w/b ratio of the pastes, but also on the content of limestone powder. Acetic acid reacts with calcium hydroxide and carbonate thus dissolving the pastes, while sulfuric acid consumed calcium hydroxide, and generated gypsum and ettringite. The consumption of calcium hydroxide in the flowing solution group is higher than that in the static solution because the flowing sulfuric acid solution has negative effect upon the gypsum crystallization. Fly ash and silica fume are beneficial to limestone cement paste because of the less calcium hydroxide formation, which is among the hydrates vulnerable to acid erosion. DOI: http://dx.doi.org/10.5755/j01.ms.20.4.6231

  2. Limestone and Zeolite as Alternative Media in Horizontal Subsurface Flow Constructed Wetlands: Laboratory-Scale Studies

    Science.gov (United States)

    Lizama, K.; Jaque, I.; Ayala, J.

    2016-12-01

    Arsenic is well known for its chronic toxicity. Millions of people around the world are currently at risk, drinking water with As concentrations above 10 ppb, the WHO drinking water guideline. Although different treatment options exist, they are often limited by elevated costs and maintenance requirements. Constructed wetlands are a natural water treatment system, capable to remove metals and metalloids -including As- via different physical, chemical and biological processes. The use of alternative supporting media to enhance As removal in subsurface flow wetlands has been recommended, but not sufficiently studied. Limestone and zeolite have been identified as effective supporting media in subsurface flow wetlands aiming As removal. However, there are still key aspects to be addressed, such as the implications of using these media, the speciation in the solid phase, the role of vegetation, etc. This study investigated the performance of limestone and zeolite in three types of experiments: batch, column and as main supporting media in a bench scale horizontal subsurface flow wetland system. Synthetic water resembling a contaminated river in Chile (As concentration=3 mg/L, Fe concentration= 100 mg/L, pH=2) was used in all experiments. In the batch experiments, the As concentration, the mass of media and the contact time were varied. The column system consisted of three limestone columns and three zeolite columns, operated under a hydraulic loading of 20 mm/d. The wetland system consisted of twelve PVC cells: six filled with zeolite and six with limestone. Phragmites australis were planted in three cells of each media type, as control cells. From the batch experiments, maximum As sorption capacities as indicated by Langmuir model were 1.3 mg/g for limestone and 0.17 mg/g for zeolite, at 18 h contact time and 6.3 g/L medium concentration. EDS and XPS analyses revealed that As and Fe were retained in zeolite at the end of the batch experiments. Zeolite and limestone

  3. The Women’s Museum in Denmark

    OpenAIRE

    Ipsen, Merete

    2010-01-01

    The Women’s Museum in Denmark isa nationally accredited museum which explores women’s cultural history by linking the historical to the contemporary. The museum started as a grass root movement in the 1980s. Today the museum welcomes you to 1200 square meters of exhibitions. The exhibitions comprise a general history about women’s lives from prehistoric to present time where women are subject in the history, and a general history about the change in childhood with focus on gender. Add to this...

  4. Willingness to Pay for Insurance in Denmark

    DEFF Research Database (Denmark)

    Hansen, Jan V.; Højbjerg Jacobsen, Rasmus; Lau, Morten

    2016-01-01

    Danish population, and information on household income and wealth from registers at Statistics Denmark. The results show that the willingness to pay is marginally higher than the actuarially fair value under expected utility theory, but significantly higher under rank-dependent utility theory, and up......We estimate how much Danish households are willing to pay for auto, home, and house insurance. We use a unique combination of claims data from a large Danish insurance company, measures of individual risk attitudes and discount rates from a field experiment with a representative sample of the adult...

  5. Epidemiology of cerebral palsy in Southern Denmark

    DEFF Research Database (Denmark)

    Frøslev-Friis, Christina; Dunkhase-Heinl, Ulrike; Andersen, Johnny Dohn Holmgren

    2015-01-01

    INTRODUCTION: The aim of this study was to describe the prevalence, subtypes, severity and neuroimaging findings of cerebral palsy (CP) in a cohort of children born in Southern Denmark. Risk factors were analysed and aetiology considered. METHODS: A population-based cohort study covering 17...... prevention of CP is possible if the numbers of preterm births and multiple pregnancies can be reduced. FUNDING: The Danish Cerebral Palsy Follow-up Programme is supported by the foundation "Ludvig og Sara Elsass Fond". TRIAL REGISTRATION: 2008-58-0034....

  6. The Sale of Alcohol in Denmark

    DEFF Research Database (Denmark)

    la Cour, Lisbeth; Milhøj, Anders

    2005-01-01

    the reader that the total sale of alcohol has been fairly constant we will present graphs and various indicators and tests of the degree of temporal dependence in this series. The overall impression from this analysis is that our first hypothesis seems to be supported -at least not contradicted - by the data...... are: First we want to convince the reader that the total sale of alcohol in Denmark since 1980 has been fairly stable. By total sale we mean the total sale of 100% alcohol so the three categories - beer, wine and spirits are measured in litres of 100% alcohol equivalents. In order to convince...

  7. Coming to terms with English in Denmark

    DEFF Research Database (Denmark)

    Thøgersen, Jacob Martin

    2010-01-01

    This paper presents an investigation of Danes' attitudes towards English through qualitative interviews. Denmark, like most other countries in the so-called Western world, is under significant linguistic and cultural influence from (American) English. In this paper, I analyse how Danes come...... to terms with that. Most striking is the great uniformity in the discourses through which English is constructed on the one hand as the default language of the world, on the other as a sign of modernity. An important by-product of the investigation is that it reveals how attitudes are constructed in situ...

  8. Multicultural Upper Secondary School Life in Denmark

    DEFF Research Database (Denmark)

    Mørck, Yvonne

    2007-01-01

    Education has played an important role in the development of the Nordic welfare states. As in other European countries, present day Denmark wrestles with the problem of finding ways to handle the increased diversity of its population in terms of, for instance, ethnicity, religion and language...... secondary school as a micro-sociological laboratory of the multicultural processes and developments taking place in society at large. It is recommended to reflect upon and implement different strategies that could support a ‘citizenship education' which is needed in order to advance the cohesion...

  9. Energy in Denmark 1990-2005

    International Nuclear Information System (INIS)

    1976-09-01

    Denmarks energy situation is investigated. It is shown that it is possible to reduce the rate of growth of energy comsumption from a historic rate of 3-5 % per year to under 1.5 % per year within the next fifthteen years, and that this can be done without harm to the general economic development. It is said that on the contrary, a reduced growth in energy comsumption would be of considerable advantage to the economy also with regard to ensuring supplies and protecting the environment (B.P.)

  10. Public-private partnerships in Denmark

    DEFF Research Database (Denmark)

    Esbjerg, Lars; Grunert, Klaus G.; Bruun, Peter

    2004-01-01

    element of this project, this report presents an inventory of public-private partnerships in Denmark. More specifically, it provides an inventory of past, present and proposed research projects related to food quality and food safety involving both public and private partners. Furthermore it points...... to a number of opportunities for developing public-private partnerships.......Food safety and food quality are issues that are high on the public agenda. To ensure that consumers are able to buy and consume safe and high quality foods is not a trivial matter. It involves numerous actors in the food chain, often from several countries as many food products cross national...

  11. Flexicurity - labour market performance in Denmark

    DEFF Research Database (Denmark)

    Andersen, Torben M.; Svarer, Michael

    Unemployment is at a low and stable level in Denmark. This achievement is often attributed to the so-called flexicurity model combining flexible hiring and firing rules for employers with income security for employees. Whatever virtues this model may have, a low and stable unemployment rate...... the incentive structure without taking resort to general benefit reductions. We argue that the workfare policies have played an important role running primarily via motivation/threat and wage effects. However, active labour market policies are resource demanding, and although the workfare reforms have improved...

  12. Improved survival after rectal cancer in Denmark

    DEFF Research Database (Denmark)

    Bülow, S; Harling, H; Iversen, L H

    2010-01-01

    Objective In 1995, an analysis showed an inferior prognosis after rectal cancer in Denmark compared with the other Scandinavian countries. The Danish Colorectal Cancer Group (DCCG) was established with the aim of improving the prognosis, and in this study we present a survival analysis of patients...... treated from 1994 to 2006. Method The study was based on the National Rectal Cancer Registry and the National Colorectal Cancer Database, supplemented with data from the Central Population Registry. The analysis included actuarial overall and relative survival. Results A total of 10 632 patients were...

  13. Compressed Air Energy Storage in Denmark

    DEFF Research Database (Denmark)

    Salgi, Georges Garabeth; Lund, Henrik

    2006-01-01

    is analysed with regard to the Danish energy system. In Denmark, wind power supplies 20% of the electricity demand and 50% is produced by combined heat and power (CHP). The operation of CAES requires high electricity price volatility. However, in the Nordic region, large hydro capacities have so far kept......Compressed air energy storage system (CAES) is a technology which can be used for integrating more fluctuating renewable energy sources into the electricity supply system. On a utility scale, CAES has a high feasibility potential compared to other storage technologies. Here, the technology...

  14. Participation in the broadband society in Denmark

    DEFF Research Database (Denmark)

    Falch, Morten; Henten, Anders; Skouby, Knud Erik

    2009-01-01

    passed the threshold set by the EU with respect to the relevance of initiating a discussion on the implementation of a universal service obligation on broadband. As documented in the paper, there are groups among primarily the elderly and the unemployed who do not have Internet access. Their own......The purpose of the paper is to provide an empirical overview of broadband developments in Denmark. The overview includes sections on coverage and penetration, connection speeds, retail prices, competition, interconnection prices, and residential access to Internet. The documentation shows...

  15. Country policy profile - Denmark. December 2015

    International Nuclear Information System (INIS)

    2015-12-01

    In Denmark, electricity from renewable sources is promoted through a premium tariff and net-metering. Furthermore, loan guarantees are provided for local initiatives for the construction of wind energy plants. Small scale installations for renewable electricity generation that are categorised as strategically important receive support through subsidies. RES for heating are supported through exemption of various taxes that apply for fossil fuels for heating (carbon dioxide taxes supply, import and production of fossil fuels for heating purposes). Biogas is further supported by a direct premium tariff. RES for transport are generally supported through a quota system. bio-fuels for transport profit from tax incentives (RES LEGAL Europe, 2014)

  16. Control of food irradiation in Denmark

    International Nuclear Information System (INIS)

    Leth, T.

    1996-01-01

    In Denmark food irradiation is not allowed. However, with the consideration within EEC about directives regulating food irradiation and the development of methods for detection, it has been found necessary to ascertain that illegally irradiated foods are not found on the Danish market. Irradiation of spices is allowed in many countries even without being declared in the foods. It thus seemed logical to begin the control of food irradiation by screening a number of spices. This resulted in 1992 in the assessment of 105 samples and in 1993 of 48 samples. (author)

  17. Willingness to Pay for Insurance in Denmark

    DEFF Research Database (Denmark)

    Hansen, Jan V.; Højbjerg Jacobsen, Rasmus; Lau, Morten I.

    We estimate the maximum amount that Danish households are willing to pay for three different types of insurance: auto, home and house insurance. We use a unique combination of claims data from the largest private insurance company in Denmark, measures of individual risk attitudes and discount rates...... possible states of nature, where all uncertainty is realized in the initial period and any loss incurred by an accident is subtracted from initial wealth. The estimated willingness to pay is based on annual claims and should thus be considered as an annual premium. Since there is some uncertainty about...... of the insurance claims....

  18. Morphological Changes of Limestone Sorbent Particles during Carbonation/Calcination Looping Cycles in a Thermogravimetric Analyzer (TGA) and Reactivation with Steam

    KAUST Repository

    Wu, Y.; Blamey, J.; Anthony, E. J.; Fennell, P. S.

    2010-01-01

    Carbonation and calcination looping cycles were carried out on four limestones in a thermogravimetric analyzer (TGA). The CO2 carrying capacity of a limestone particle decays very quickly in the first 10 cycles, reducing to about 20% of its original

  19. Comparison of Limestone and Ground Fish for Treatment of Nutritional Rickets in Children in Nigeria.

    Science.gov (United States)

    Thacher, Tom D; Bommersbach, Tanner J; Pettifor, John M; Isichei, Christian O; Fischer, Philip R

    2015-07-01

    To determine whether children with calcium-deficiency rickets respond better to treatment with calcium as limestone or as ground fish. Nigerian children with active rickets (n = 96) were randomized to receive calcium as powdered limestone (920 mg of elemental calcium) or ground fish (952 mg of elemental calcium) daily for 24 weeks. Radiographic healing was defined as achieving a score of 1.5 or less on a 10-point scale. The median (range) age of enrolled children was 35 (6-151) months. Of the 88 children who completed the study, 29 (66%) in the ground fish group and 24 (55%) in the limestone group achieved the primary outcome of a radiographic score of 1.5 or less within 6 months (P = .39). The mean radiographic score improved from 6.2 ± 2.4 to 1.8 ± 2.2 in the ground fish group and from 6.3 ± 2.2 to 2.1 ± 2.4 in the limestone group (P = .68 for group comparison). In an intention to treat analysis adjusted for baseline radiographic score, age, milk calcium intake, and serum 25-hydroxyvitamin D concentration, the response to treatment did not differ between the 2 groups (P = .39). Younger age was associated with more complete radiographic healing in the adjusted model (aOR 0.74 [95% CI 0.57-0.92]). After 24 weeks of treatment, serum alkaline phosphatase had decreased, calcium and 25-hydroxyvitamin D increased, and bone mineral density increased in both groups, without significant differences between treatment groups. In children with calcium-deficiency rickets, treatment with calcium as either ground fish or limestone for 6 months healed rickets in the majority of children. Copyright © 2015 The Authors. Published by Elsevier Inc. All rights reserved.

  20. Source attribution of human campylobacteriosis in Denmark.

    Science.gov (United States)

    Boysen, L; Rosenquist, H; Larsson, J T; Nielsen, E M; Sørensen, G; Nordentoft, S; Hald, T

    2014-08-01

    SUMMARY This study assesses the contribution of different sources of human campylobacteriosis in Denmark using two different source-attribution approaches. In total, 794 non-human isolates and 406 isolates from human cases (domestic, travel related, and cases with unknown travel history) were collected. Isolates were characterized by multilocus sequence typing, flaA typing and susceptibility to antibiotics. Both models used indicate that the major burden of human campylobacteriosis in Denmark originates from the domestic broiler chicken reservoir. The second most important reservoir was found to be cattle. The Asymmetric Island model attributed 52% [95% credibility interval (CrI) 37-67] to Danish chicken, 17% (95% CrI 3-33) to imported chicken, and 17% (95% CrI 7-28) to cattle. Similarly, the Campylobacter source-attribution model apportioned 38% (95% CrI 28-47) to Danish chicken, 14% (95% CrI 10-18) to imported chicken, and 16% (95% CrI 7-25) to cattle. The addition of flaA type as an extra discriminatory typing parameter did not change the attribution of cases markedly.

  1. Environmental radioactivity in Denmark in 1974

    International Nuclear Information System (INIS)

    Aarkrog, A.; Lippert, J.

    1975-06-01

    The present report deals with the measurement of fall-out radioactivity in Denmark in 1974. Strontium-90 was determined in samples from all over the country of precipitation, soil, ground water, sea water, grass, dried milk, fresh milk, grain, bread, potatoes, vegetables, fruit, total diet, drinking water, and human bone. Furthermore, 90 Sr was determined in local samples of air, rain water, grass, sea plants, fish, and meat. Caesium-137 was determined in soil, sea water, milk, grain products, potatoes, vegetables, fruit, total diet, fish, and meat. It was also measured by wholebody-counting of a control group at Risoe. Estimates of the mean contents of radiostrontium and radiocaesium in the human diet in Denmark during 1974 are given. The gamma-background was measured regularly at locations around Risoe, at ten of the State experimental farms, in one area in Zealand, one in Jutland, and along the shores of the Great Belt. Finally the report includes routine surveys of environmental samples from the Risoe area. (author)

  2. Environmental radioactivity in Denmark in 1986

    International Nuclear Information System (INIS)

    Aarkrog, A.; Boetter-Jensen, L.; Chen Qing Jiang; Dahlgaard, H.; Hansen, H.; Holm, E.; Lauridsen, B.; Nielsen, S.P.; Soegaard-Hansen, J.

    1988-11-01

    Strontium-90, radiocesium and other radionuclides were determined in samples from all over the country of air, precipitation, stream water, lake water, ground water, drinking water, sea water, soil, sediments, dried milk, fresh milk, meat, fish, chese, eggs, grain, bread, potatoes, vegetables, fruit, grass, moss, lichen, sea plants, total diet, and humans. Estimates of the mean contents of radiostrontium and radiocesium in the human diet in Denmark during 1986 are given. Tritium was determined in precipitation, ground water, other fresh waters and sea water. The gamma-background was measured regularly by TLD, ionization chamber and on site gamma-spectroscopy at locations around Risoe, at ten of the State experimental farms, along the coasts of the Great Belt and around Gylling Naes. The marine environments at Barsebaeck and Ringhals were monitored for 137Cs and corrosion products (58Co, 60Co, 65Zn, 54Mn). The Chernobyl accident caused a substantial expansion of the environmental monitoring activities in Denmark. The programme was expanded to an extent similar to that in the sixties. (author) 178 tabs., 70 ills., 34 refs

  3. Environmental radioactivity in Denmark in 1976

    International Nuclear Information System (INIS)

    Aarkrog, A.; Lippert, J.

    1977-06-01

    The present report deals with the measurement of fall-out radioactivity in Denmark in 1976. Strontium-90 was determined in samples from all over the country of precipitation, soil, ground water, sea water, grass, dried milk, fresh milk, grain, bread, potatoes, vegetables, fruit, total diet, and human bone. Furthermore, 90 Sr was determined in local samples of air, rain water, grass, sea plants, fish, and meat. Caesium-137 was determined in soil, sea water, milk, grain products, potatoes, vegetables, fruit, total diet, fish, and meat. It was also measured by wholebody-counting of a control group at Risoe. Estimates of the mean contents of radiostrontium and radiocaesium in the human diet in Denmark during 1976 are given. The γ-background was measured regularly at locations around Risoe, and ten of the State experimental farms. The marine environments at Barsebaeck and Ringhals were monitored for 137 Cs and corrosion products. Finally the report includes routine surveys of environmental samples from the Risoe area. Results of plutonium determinations in soil and sediments from 1975 and in grain from 1963 and 1965 are presented in this report. (author)

  4. Once Upon a Time, in the Enchanted Kingdom of Denmark

    DEFF Research Database (Denmark)

    Chemi, Tatiana

    Some definitions about creativity and innovation, drawn from the terms’ etymology and a report on a difficult quest. On the emerging field of arts-in-business in Denmark.......Some definitions about creativity and innovation, drawn from the terms’ etymology and a report on a difficult quest. On the emerging field of arts-in-business in Denmark....

  5. Towards fully renewable energy systems - Experience and trends in Denmark

    DEFF Research Database (Denmark)

    Pinson, Pierre; Mitridati, Lesia Marie-Jeanne Mariane; Ordoudis, Christos

    2017-01-01

    .g., wind and solar. Denmark is a country that invested early in wind energy, rapidly proposing very ambitious goals for the future of its energy system and global energy usage. While the case of Denmark is specific due to its limited size and good interconnections, there may still be a lot to learn from...

  6. The effects of 10 years Railway investment in Denmark

    DEFF Research Database (Denmark)

    Hansen, Sten A.

    1998-01-01

    The paper retrives the impacts of the last 10 years of investment in railway infrastructure in Denmark and ooncludes, that traveltimes and frequency is large unchanged during that period.......The paper retrives the impacts of the last 10 years of investment in railway infrastructure in Denmark and ooncludes, that traveltimes and frequency is large unchanged during that period....

  7. Drug-related mortality in Denmark 1970-93

    DEFF Research Database (Denmark)

    Juel, K; Helweg-Larsen, K

    1999-01-01

    We analysed drug-related mortality in Denmark with respect to secular trends, gender, and regional variations, for the period 1970-93, for all deaths from poisoning and among drug addicts. The study was based on the Register of Causes of Death in Denmark and included 6,229 drug-related deaths...

  8. The vocational education and training system in Denmark

    DEFF Research Database (Denmark)

    Cort, Pia; Wiborg, Susanne

    2009-01-01

    Analysis of developments in vocational education and training systems in Australia, Canada, Denmark, France, Germany, Korea, Mexico, Morocco, the UK and the US.......Analysis of developments in vocational education and training systems in Australia, Canada, Denmark, France, Germany, Korea, Mexico, Morocco, the UK and the US....

  9. Denmark's Master of Public Governance Program: Assessment and Lessons Learned

    Science.gov (United States)

    Greve, Carsten; Pedersen, Anne Reff

    2017-01-01

    This paper focuses on Denmark's Master of Public Governance and its assessments and lessons learned. Denmark is seen to have an efficient economy and public sector, a digitalized public service delivery system, and an advanced work-life balance. The Danish government invested substantial resources into developing a Master of Public Governance…

  10. GIS Based Analysis of future district heating potential in Denmark

    DEFF Research Database (Denmark)

    Nielsen, Steffen; Möller, Bernd

    2012-01-01

    and their heat demand has in recent years been assessed in a heat atlas including all buildings in Denmark. The focus in this article is to further develop a method for assessing the costs associated with supplying these buildings with DH. The analysis takes departure in the existing DH areas in Denmark...

  11. GIS based analysis of future district heating potential in Denmark

    DEFF Research Database (Denmark)

    Nielsen, Steffen; Möller, Bernd

    2013-01-01

    in Denmark have been mapped in a heat atlas which includes all buildings and their heat demands. This article focuses on developing a method for assessing the costs associated with supplying these buildings with DH. The analysis is based on the existing DH areas in Denmark. By finding the heat production...

  12. The Question of Sharīʿa in Denmark

    DEFF Research Database (Denmark)

    Vinding, Niels Valdemar

    2016-01-01

    Denmark contributor Niels V. Vinding comments on recent discussions of sharīʿa in Denmark that have arisen on the basis of uninformed media reporting, which has had the consequence of sparking legislation that may have discriminatory effects on Muslims. These developments come in the wake of the ...

  13. "Fortid", "Nutid", "Fremtid" (Past, Present, Future): Professional Counseling in Denmark

    Science.gov (United States)

    Dixon, Andrea L.; Hansen, Nanja Holland

    2010-01-01

    In this article, the authors offer a comprehensive overview of the counseling profession in Denmark. The history and development of counseling is considered, followed by a review of the current state of Danish professional counseling. Finally, impressions of the future of professional counseling in Denmark are presented based on the past and…

  14. Iodine. Do we need an enrichment program in Denmark?

    DEFF Research Database (Denmark)

    Rasmussen, Lone Banke; Andersson, G.; Haraldsdottir, J.

    1996-01-01

    A working group was established to evaluate the need for iodine enrichment in Denmark. Judged from studies of urinary iodine excretion and one dietary survey the intake of iodine in Denmark is low compared with recommended intakes. The occurrence of non-toxic goitre is relatively high; between 9...

  15. Mycobacterium marinum infections in Denmark from 2004 to 2017

    DEFF Research Database (Denmark)

    Holden, Inge K.; Kehrer, Michala; Andersen, Aase B.

    2018-01-01

    Mycobacterium marinum (M. marinum) is a slowly growing nontuberculous mycobacterium. The incidence of M. marinum infections in Denmark is unknown. We conducted a retrospective nationwide study including all culture confirmed cases of M. marinum from 2004 to 2017 in Denmark. All available medical ...

  16. Contact dermatitis caused by iodopropynyl butylcarbamate in Denmark

    DEFF Research Database (Denmark)

    Martin-Gorgojo, Alejandro; Johansen, Jeanne Duus

    2013-01-01

    Iodopropynyl butylcarbamate (IPBC) is a preservative that may cause contact allergy. The first cases were reported in 1997, and IPBC is currently included in our extended European baseline series in Denmark.......Iodopropynyl butylcarbamate (IPBC) is a preservative that may cause contact allergy. The first cases were reported in 1997, and IPBC is currently included in our extended European baseline series in Denmark....

  17. Adult Literacy Policy in Denmark - the Discursive Effects of PIAAC

    DEFF Research Database (Denmark)

    Cort, Pia; Larson, Anne; Mariager-Anderson, Kristina

    The results of the first PIAAC survey were published in October 2013. In the case of Denmark, the survey showed that Denmark is below OECD average when it comes to reading skills, above average in regard to numeracy and on average in regard to IT skills. In this paper, we analyse how the PIAAC...

  18. Epidemiology of tuberculosis in HIV-infected patients in Denmark

    DEFF Research Database (Denmark)

    Dragsted, Ulrik Bak; Bauer, J; Poulsen, S

    1999-01-01

    Denmark is an area of low incidence of HIV and tuberculosis (TB). The number of newly reported cases of HIV has been stable during the 1990s, whereas the number of TB cases has doubled in Denmark in the past decade, mainly due to immigration. However, among native Danes the incidence of TB has...

  19. An instructive comparison of Denmark and Sweden CO2 emissions

    International Nuclear Information System (INIS)

    Huffer, E.; Nifenecker, H.

    2007-02-01

    Denmark and Sweden are close neighbors, they have pretty much the same Climate, so that it is interesting to try to understand what makes them so different in their per capita GHG (Green House Gas) emissions from fuel combustion. Indeed, the CO 2 emissions of Denmark and Sweden are practically equal while the population of Sweden is much larger. Thus, the per capita CO 2 emissions of Denmark are 63 % larger than those of Sweden. Denmark resorts heavily to fossil fuels for its production of both its electric power and its industrial heat whereas Sweden resorts to other primary energy sources which are either renewable or do not emit CO 2 . True, Sweden is in a privileged situation for its access to hydro power and to biomass but Denmark could considerably reduce its CO 2 emissions if it were to call on nuclear power as Sweden has been doing. (A.L.B.)

  20. Rare earth element and strontium isotopic study of seamount-type limestones in Mesozoic accretionary complex of Southern Chichibu Terrane, central Japan. Implication for incorporation process of seawater REE into limestones

    International Nuclear Information System (INIS)

    Tanaka, Kazuya; Miura, Noriko; Asahara, Yoshihiro; Kawabe, Iwao

    2003-01-01

    Ishimaki and Tahara limestones occur as exotic blocks juxtaposed in the Mesozoic (Jurassic) accretionary complex of Southern Chichibu Terrane in eastern Aichi Prefecture, central Japan. They are supposed to be of the seamount-type limestone, since they have no terrigenous materials and are intimately associated with greenstones. REE (rare earth elements) and Sr isotopic studies for the limestones have been made in order to know their geochemical characteristics, ages and origins. Their 87 Sr/ 86 Sr ratios, when referred to the seawater 87 Sr/ 86 Sr curve and relevant geological data, suggest that Ishimaki and Tahara limestones are the late Permian and the Carboniferous to the Early Permian, respectively. Two greenstone fragments found inside the Ishimaki limestone block and one greenstone sample associated with Tahara limestone block, resemble the Hawaiian alkali basalt in the their REE and Y patterns. This is supporting the idea that the limestone blocks may be parts of reef limestones on ancient volcanic seamounts. All the limestone samples, except three unusual Tahara ones, show seawater REE and Y signatures in their chondrite-normalized patterns. Their REE/Ca ratios, however, are 10 2 -10 4 times as high as those ratios of modern biogenic carbonates like corals and the seawater. Accordingly, seawater REE and Y were incorporated into the limestones, when originally biogenic carbonates transformed into inorganic calcite and its secondary growths occurred in diagenesis in contact with sufficient seawater. This view is favored by the reported REE partition experiment between calcite overgrowths and seawater solution. The seawater Ce anomaly as a function of water depth in the modern ocean is a key to infer the water depth of the REE and Y incorporation. The Ce anomalies given by log (Ce/Ce*) for about a half of Ishimaki samples and most of Tahara ones are between -0.5 and -0.2, which are compatible with the shallow water origin. Another half of Ishimaki samples