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Sirvi Autor "Raamets, Jane" järgi

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  • Pisipilt
    Kirje
    Agrotehniliste võtete mõju mullafauna gruppide esinemisele eri vanuselistes mustikaistandikes
    (Eesti Maaülikool, 2019) Raamets, Jane; Shanskiy, Merrit (juhendaja); Ivask, Mari (juhendaja); Aiandus
    Muld vastutab nii kliima regulatsiooni, veeringluse, reostuskontrolli ja varude säilitamise eest.Samuti on muld elukeskkonnaks mullafaunale, kes osaleb nii mullas toimuvas aine – ja energiavahetuses kui ka lagunemisprotsessides Käesoleva magistritöö eesmärgiks oli välja selgitada pinnasepüüniste ja mullaproovide abil, kas agrotehnilised võtted omavad mõju mullafauna gruppide esinemisele eri vanuselistes mustikaistandikes. Töö tulemustest selgub, et kõige arvukam on mullafauna vanas, 2003. aastal rajatud mustikaistandikus. Uuel alal (2017. aastal rajatud mustikaistandikus), kus kasutatakse erinevaid agrotehnilisi võtteid (multśimine, kastmissüsteemid) olid arvukusnäitajad pea poole madalamad. Töö tulemustest selgus ka, et mikrovihmutamine omab mõju mullafauna gruppidele. Alal, kus kasutati mikrovihmutamist, puudusid 2018.aasta juunis nälkjad, sarnastiivalised (Homoptera), lehetäilised (Aphidoidea), teod (Gastropoda) ja augustis ka lutikalased (Heteroptera)). Lisaks agrotehniliste võtete kasutamisele tuleb arvesse võtta ka istandike vanust. Vanal alal on kooslus koos eksisteerinud pikemat aega ja seega ka stabiilsem. Kindlamate järelduste tegemiseks on soovitav korrata läbiviidud katseid rohkemate paralleelide arvu ja kontrollalade kaasamisega.
  • Pisipilt
    Kirje
    Preliminary study of microplastics in bottled and tap water in Estonia
    (Estonian University of Life Sciences, 2024) Meitern, Annika Joy; Neilant, Keith; Raamets, Jane
    Microplastics (MPs) are a growing environmental concern due to their widespread occurrence and potential harmful impacts on ecosystems and public health. This preliminary study -assesses the prevalence of MPs in bottled and tap water in Estonia and reviews related research in the field. The study aimed to evaluate the occurrence of MPs and understand the potential influence of the water source and packaging material on water properties. The study encompassed 12 different bottled water products from 9 Estonian brands and tap water samples from Tallinn and Tartu. All the tested water samples contained MPs, predominantly fibers, with blue and transparent being the most common colors. The packaging material, bottle caps, or the water source did not influence the number of MPs found in bottled water. Interestingly, water packaged in glass bottles contained a higher count of MPs than in plastic bottles and tap water. The study underscores the need for further research to determine the sources of contamination.
  • Pisipilt
    Kirje
    Siseõhu kvaliteet põhu- ja pilliroopakkidest seintega elumajades
    (Estonian Academic Agricultural Society, 2020) Raamets, Jane; Ruus, Aime; Ivask, Mari; Nei, Lembit; Muoni, Karin
    Straw and reed are natural local insulation- and construction materials, which properties allow them to replace energy intensive building materials. In general, straw and reed as building materials are considered harmless to the environment and human health. Unfortunately, the use of these materials may bring about mould growth in buildings which may result in different diseases (for example irritation of eyes, nose and throat, allergic rhinitis, conjunctivitis, and asthma) in people with weaker immune systems. No research has been carried out on the topic of microbiological community in straw and reed houses in climatic conditions similar to Estonia, although buildings made of natural materials are becoming more and more popular. The aims of the study were to investigate the indoor climate of buildings with straw and reedbale walls and to determine the factors influencing indoor air quality. In order to fulfil the set aim: (1) air quality was tested in the bedrooms of the studied houses, and the microbial species in air and walls were determined; (2) the indoor air quality parameters (CO2, RH%, and temperature) in air and at two different heights in the walls were measured. The results enable to conclude that the walls of straw or reed-bale house are suitable in Estonian climatic conditions, which as a result of professional design, usage of materials suitable for building, and high-quality craftsmanship provides a healthy and environmentally friendly housing.