He inside the case of one particular sheet. Whensheets have been were overlapped, the EMI SE with the in the WWCF/GnP carbon papers approxisheetsoverlapped, the EMI SE values valuesWWCF/GnP carbon papers reached reached mately 72.5 dB at ten.five at 10.five about 72.5 dB GHz. GHz.Nanomaterials 2021, 11,10 ofAuthor Contributions: Conceptualization, H.K.S.; methodology, H.K.S. and J.P.; vali-dation, H.K.S. and J.P.; formal evaluation, H.K.S. and J.P.; investigation, H.K.S., J.P. and L.K.K.; sources, H.K.S. and L.K.K.; information curation, investigation, H.K.S.; writing–original draft preparation, H.K.S.; writing– assessment and editing, H.K.S.; visualization, H.K.S.; supervision, H.K.S. and H.G.K.; project administration, H.K.S. and H.G.K.; funding acquisition, H.K.S. and H.G.K. All authors have study and agreed towards the published version on the manuscript. Funding: This operate was supported by the National Psalmotoxin 1 Protocol analysis Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2020R1I1A1A01072906). This investigation was also supported by Simple Science Analysis Program by way of the National Investigation Foundation of Korea (NRF) funded by the Ministry of Education (no. 2016R1A6A1A03012069). Institutional Overview Board Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability Statement: The data are obtainable by corresponding author. Conflicts of Interest: The authors declare no conflict of interest.nanomaterialsReviewDielectric Fluids for Energy Transformers with Unique Emphasis on Biodegradable NanofluidsMilos S pataky 1 , Juraj Kurimsk1, and Michal Rajn 1,Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Letn9, Kosice 04200, Slovakia; [email protected] (M.S.); [email protected] (M.R.) Institute of Experimental Physics SAS, Watsonova 47, Kosice 04001, Slovakia Correspondence: [email protected]: This assessment is focused on the analysis of dielectric fluids, specially usually Anti-Obesity Compound Library Protocol employed power transformer oils enhanced by nanoparticles, i.e., nanofluids. You can find variations amongst numerous combinations of base fluids and nanoparticles ready in distinctive methods. The key aim of this evaluation was to present current research in this field sorted by the used nanoparticles. Nanofluids based on mineral oils, organic, or synthetic esters have been investigated with regards to the nature of nanoparticles, especially Al2 O3 , TiO2 , Fe2 O3 , Fe3 O4 , graphene, fullerene, and other folks. The combinations of environmentally friendly oils and nanoparticles have been presented. Finally, the article focused on the description of current dielectric fluids usable in energy transformers plus the possibilities of enhancing new and existing fluids with nanoparticles, especially their physical, dielectric, and chemical properties, but with regard to environmental aspects. Keywords and phrases: nanofluid; insulation oils; biodegradable fluids; nanoparticles; stabilityCitation: S pataky, M.; Kurimsk J.; Rajn , M. Dielectric Fluids for Power Transformers with Special Emphasis on Biodegradable Nanofluids. Nanomaterials 2021, 11, 2885. https:// doi.org/10.3390/nano11112885 Academic Editors: Gawel Zyla and Jacek Fal Received: 9 October 2021 Accepted: 27 October 2021 Published: 28 October1. Introduction Based on the sustainable improvement, lots of challenges must be solved inside the world’s market, particularly in energy engineering. This critical part of the sector faces great stress to enhance technologies to ensure the provide of electricity, with h.