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  1. Article ; Online: In Silico Investigation of Selected Pesticides and Their Determination in Agricultural Products Using QuEChERS Methodology and HPLC-DAD

    Stefan Petrović / Biljana Arsić / Ivana Zlatanović / Jelena Milićević / Sanja Glišić / Milan Mitić / Rada Đurović-Pejčev / Gordana Stojanović

    International Journal of Molecular Sciences, Vol 24, Iss 8003, p

    2023  Volume 8003

    Abstract: In this study, we considered some pesticides as active substances within formulations for the protection of plant-based food in the Republic of Serbia in silico, because these pesticides have not often been investigated in this way previously, and in an ... ...

    Abstract In this study, we considered some pesticides as active substances within formulations for the protection of plant-based food in the Republic of Serbia in silico, because these pesticides have not often been investigated in this way previously, and in an analytical way, because there are not very many available fast, cheap, and easy methods for their determination in real agricultural samples. Seven pesticides were detected in selected agricultural products (tomatoes, cucumbers, peppers, and grapes) using the QuEChERS methodology and HPLC-DAD. Standard curves for the investigated pesticides (chlorantraniliprole, methomyl, metalaxyl, thiacloprid, acetamiprid, emamectin benzoate, and cymoxanil) show good linearity, with R 2 values from 0.9785 to 0.9996. The HPLC-DAD method is fast, and these pesticides can be determined in real spiked samples in less than 15 min. We further characterized the pesticides we found in food based on physicochemical properties and molecular descriptors to predict the absorption, distribution, metabolism, elimination, and toxicity (ADMET) of the compounds. We summarized the data supporting their effects on humans using various computational tools to determine their potential adverse effects. The results of our prediction study show that all of the selected pesticides considered in this study have good oral bioavailability, and those with high toxicity, therefore, could be harmful to human health. Chlorantraniliprole was shown in a molecular docking study as a good starting point for a new Alzheimer’s disease drug candidate.
    Keywords agriculture ; toxicity ; Alzheimer’s disease ; EIIP ; Mus musculus ; Homo sapiens ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Subject code 540
    Language English
    Publishing date 2023-04-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Model for Determining Geographical Distribution of Heat Saving Potentials in Danish Building Stock

    Stefan Petrovic / Kenneth Karlsson

    ISPRS International Journal of Geo-Information, Vol 3, Iss 1, Pp 143-

    2014  Volume 165

    Abstract: Since the global oil crisis in the 1970s, Denmark has followed a path towards energy independency by continuously improving its energy efficiency and energy conservation. Energy efficiency was mainly tackled by introducing a high number of combined heat ... ...

    Abstract Since the global oil crisis in the 1970s, Denmark has followed a path towards energy independency by continuously improving its energy efficiency and energy conservation. Energy efficiency was mainly tackled by introducing a high number of combined heat and power plants in the system, while energy conservation was predominantly approached by implementing heat saving measures. Today, with the goal of 100% renewable energy within the power and heat sector by the year 2035, reductions in energy demand for space heating and the preparation of domestic hot water remain at the top of the agenda in Denmark. A highly detailed model for determining heat demand, possible heat savings and associated costs in the Danish building stock is presented. Both scheduled and energy-saving renovations until year 2030 have been analyzed. The highly detailed GIS-based heat atlas for Denmark is used as a container for storing data about physical properties for 2.5 million buildings in Denmark. Consequently, the results of the analysis can be represented on a single building level. Under the assumption that buildings with the most profitable heat savings are renovated first, the consequences of heat savings for the economy and energy system have been quantified and geographically referenced. The possibilities for further improvements of the model and the application to other geographical regions have been discussed.
    Keywords heat demand ; heat savings ; GIS ; energy conservation ; heat atlas ; Geography (General) ; G1-922
    Subject code 690
    Language English
    Publishing date 2014-02-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: Industrial excess heat for district heating in Denmark

    Bühler, Fabian / Brian Elmegaard / Kenneth Karlsson / Stefan Petrović

    Applied energy. 2017 Nov. 01, v. 205

    2017  

    Abstract: Excess heat is available from various sources and its utilisation could reduce the primary energy use. The accessibility of this heat is however dependent amongst others on the source and sink temperature, amount and potential users in its vicinity. In ... ...

    Abstract Excess heat is available from various sources and its utilisation could reduce the primary energy use. The accessibility of this heat is however dependent amongst others on the source and sink temperature, amount and potential users in its vicinity. In this work a new method is developed which analyses excess heat sources from the industrial sector and how they could be used for district heating. This method first allocates excess heat to single production units by introducing and validating a new approach. Spatial analysis of the heat sources and consumers are then performed to evaluate the potential for using them for district heating. In this way the theoretical potential of using the excess heat for covering the heating demand of buildings is determined. Through the use of industry specific temperature profiles the heat usable directly or via heat pumps is further found. A sensitivity analysis investigates the impact of future energy efficiency measures in the industry, buildings and the district heating grid on the national potential. The results show that for the case study of Denmark, 1.36TWh of district heat could be provided annually with industrial excess heat from thermal processes which equals 5.1% of the current demand. More than half of this heat was found to be usable directly, without the need for a heat pump.
    Keywords buildings ; case studies ; energy efficiency ; heat ; heat pumps ; industry ; primary energy ; temperature profiles ; Denmark
    Language English
    Dates of publication 2017-1101
    Size p. 991-1001.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2000772-3
    ISSN 0306-2619
    ISSN 0306-2619
    DOI 10.1016/j.apenergy.2017.08.032
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Spatiotemporal and economic analysis of industrial excess heat as a resource for district heating

    Bühler, Fabian / Stefan Petrović / Fridolin Müller Holm / Kenneth Karlsson / Brian Elmegaard

    Energy. 2018 May 15, v. 151

    2018  

    Abstract: Industrial excess heat may often be utilised for district heating and thus replace existing expensive or CO2-emitting technologies. Previous works analysed the distribution of excess heat by temperature intervals and their geographical distribution ... ...

    Abstract Industrial excess heat may often be utilised for district heating and thus replace existing expensive or CO2-emitting technologies. Previous works analysed the distribution of excess heat by temperature intervals and their geographical distribution relative to district heating areas. A more detailed analysis of the most suitable types of industries and the costs is required, allowing a targeted exploitation of this resource. This work extends the spatial and thermodynamic analysis, to account for the temporal match between industrial excess heat and district heating demands, as well as the costs for implementation and operation of the systems. This allows the determination of cost-effective district heating potentials, as well as the analysis of different industries and technological requirements. The results show that the temporal mismatch between excess heat and district heating demand and lack of demand, reduces the theoretical substitution potential by almost 30%. If heat storages are introduced, the total potential is reduced by only 10%. A majority of the excess heat can be utilised at socio-economic heating costs lower than the average Danish district heating price and the cost of solar district heating. Excess heat from oil refineries, building material and food production can be utilised at the lowest specific costs.
    Keywords construction materials ; cost effectiveness ; food production ; geographical distribution ; heat ; industry ; oils ; prices ; socioeconomics ; temperature
    Language English
    Dates of publication 2018-0515
    Size p. 715-728.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2019804-8
    ISSN 0360-5442 ; 0360-5442
    ISSN (online) 0360-5442
    ISSN 0360-5442
    DOI 10.1016/j.energy.2018.03.059
    Database NAL-Catalogue (AGRICOLA)

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  5. Article: Scenarios for sustainable heat supply and heat savings in municipalities - The case of Helsingør, Denmark

    Ben Amer-Allam, Sara / Marie Münster / Stefan Petrović

    Energy. 2017 Oct. 15, v. 137

    2017  

    Abstract: Local climate action is not only a domain of large cities, but also smaller urban areas that increasingly address climate change mitigation in their policy. The Danish municipality of Helsingør can achieve a substantial CO2 emissions reduction by ... ...

    Abstract Local climate action is not only a domain of large cities, but also smaller urban areas that increasingly address climate change mitigation in their policy. The Danish municipality of Helsingør can achieve a substantial CO2 emissions reduction by transforming its heat supply and deploying heat savings. In this paper, we model the heating system of Helsingør, assess it from a simple socio- and private-economic perspective, develop future scenarios, and conduct an iterative process to derive a cost-optimal mix between district heating, individual heating and heat savings. The results show that in 2030 it is cost-optimal to reduce the heating demand by 20–39% by implementing heat savings, to deploy 32%–41% of district heating and to reduce heating-related CO2 emissions by up to 95% in comparison to current emissions. In 2050, the cost-optimal share of district heating in Helsingør increases to between 38 and 44%. The resulting average heating costs and CO2 emissions are found to be sensitive to biomass and electricity price. Although the findings of the study are mainly applicable for Helsingør, the combined use of the Least Cost Tool and modelling with energyPRO is useful in planning of heating and/or cooling supply for different demand configurations, geographical region and scale.
    Keywords biomass ; carbon dioxide ; cities ; climate ; climate change ; electricity costs ; greenhouse gas emissions ; heat ; heating systems ; issues and policy ; models ; planning ; urban areas ; Denmark
    Language English
    Dates of publication 2017-1015
    Size p. 1252-1263.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2019804-8
    ISSN 0360-5442 ; 0360-5442
    ISSN (online) 0360-5442
    ISSN 0360-5442
    DOI 10.1016/j.energy.2017.06.091
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Structured inquiry-based learning

    Christopher R Dunne / Anthony R Cillo / Danielle R Glick / Katherine John / Cody Johnson / Jaspinder Kanwal / Brian T Malik / Kristina Mammano / Stefan Petrovic / William Pfister / Alexander S Rascoe / Diane Schrom / Scott Shapiro / Jeffrey W Simkins / David Strauss / Rene Talai / John P Tomtishen / Josephine Vargas / Tony Veloz /
    Thomas O Vogler / Michael E Clenshaw / Devin T Gordon-Hamm / Kathryn L Lee / Elizabeth C Marin

    PLoS Biology, Vol 12, Iss 12, p e

    Drosophila GAL4 enhancer trap characterization in an undergraduate laboratory course.

    2014  Volume 1002030

    Abstract: We have developed and tested two linked but separable structured inquiry exercises using a set of Drosophila melanogaster GAL4 enhancer trap strains for an upper-level undergraduate laboratory methods course at Bucknell University. In the first, students ...

    Abstract We have developed and tested two linked but separable structured inquiry exercises using a set of Drosophila melanogaster GAL4 enhancer trap strains for an upper-level undergraduate laboratory methods course at Bucknell University. In the first, students learn to perform inverse PCR to identify the genomic location of the GAL4 insertion, using FlyBase to identify flanking sequences and the primary literature to synthesize current knowledge regarding the nearest gene. In the second, we cross each GAL4 strain to a UAS-CD8-GFP reporter strain, and students perform whole mount CNS dissection, immunohistochemistry, confocal imaging, and analysis of developmental expression patterns. We have found these exercises to be very effective in teaching the uses and limitations of PCR and antibody-based techniques as well as critical reading of the primary literature and scientific writing. Students appreciate the opportunity to apply what they learn by generating novel data of use to the wider research community.
    Keywords Biology (General) ; QH301-705.5
    Language English
    Publishing date 2014-12-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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