Sökning: "reference particles"

Visar resultat 1 - 5 av 115 avhandlingar innehållade orden reference particles.

  1. 1. Aerosols of Isocyanates, Amines and Anhydrides : Sampling and Analysis

    Författare :Jakob Dahlin; Gunnar Skarping; Robert P. Streicher; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; isocyanate; amine; aminoisocyanate; organic acid anhydride; denuder; impactor; impinger; air sampling; LC-MS; LC-CLND; di-n-butylamine; DBA; thermal degradation; aerosol; particles; TDI; MDI; HDI; ICA; MIC; IPDI; exposure; occupational health; Analytical chemistry; Analytisk kemi; Analytical Chemistry; analytisk kemi;

    Sammanfattning : This thesis presents methods for air sampling and determination of isocyanates, amines, aminoisocyanates and anhydrides. These organic compounds are generated during thermal degradation of polymers such as polyurethane (PUR) or epoxy.Isocyanates, amines and anhydrides are airway irritants known to cause occupational asthma. LÄS MER

  3. 2. From source to the environment : Strategies for identification and determination of hydroxylated polycyclic aromatic hydrocarbons in complex particulate matrices

    Författare :Rozanna Avagyan; Roger Westerholm; Conny Östman; Marja-Liisa Riekkola; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; OH-PAHs; hydroxy-PAHs; particulate matter; PM; airborne particles; combustion particles; wood combustion; suspect screening; non-target screening; high resolution mass spectrometry; HRMS; atmospheric pressure photoionization; APPI; Analytical Chemistry; analytisk kemi;

    Sammanfattning : Adverse health effects have been linked to exposure to particulate matter, and wood combustion is considered as an important source of harmful particulate matter in the urban air and environment. Hydroxylated polycyclic aromatic hydrocarbons are a group of compounds with toxic, endocrine disrupting and carcinogenic properties. LÄS MER

  4. 3. Exploring the ecotoxicity of microparticle debris

    Författare :Zandra Gerdes; Elena Gorokhova; Martin Ogonowski; Tamara Galloway; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; microplastics as emerging pollutants; hazard assessment; ecotoxicological experimental design; aquatic toxicology; chemical vector; suspended solids; reference particles; crustaceans as test organisms; behavioural assays in ecotoxicology; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : The global distribution and anticipated increase of environmental microplastic (MP) pollution are concerning. However, while the impacts of macroplastic litter on wildlife are apparent, we know relatively little about the MP hazard potential. LÄS MER

  5. 4. The Greek of the Ancient Synagogue : An Investigation on the Greek of the Septuagint, Pseudepigrapha and the New Testament

    Författare :Georg Walser; Grekiska (antik och bysantinsk); []
    Nyckelord :HUMANIORA; HUMANITIES; sociolinguistics; foreign languages teaching; Applied linguistics; translation technique; Pentateuch; synagogue; Septuagintism; Semitism; Hebrew influence; code-switching; diglossia; conjunctions; particles; word order; participles; New Testament; Septuagint; Pseudepigrapha; Tillämpad lingvistik; undervisning i främmande språk; sociolingvistik; Greek language; Grekiska språket; Bible; Bibelvetenskap;

    Sammanfattning : This study attempts to test the hypothesis that there existed a peculiar variety of Greek which was used for certain purposes by Jewish and Christian writers in the context of the synagogue. It is argued that the origin of this variety was the translation Greek of the Pentateuch, and the background for the hypothesis is the polyglossic nature of the Greek language, i. LÄS MER

  7. 5. Road Surface and Tyre Interaction : Functional Properties affecting Road Dust Load Dynamics and Storage

    Författare :Joacim Lundberg; Sigurdur Erlingsson; Mats Gustafsson; Xavier Querol; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Road dust; Road abrasion wear; Studded tyre abrasion wear; Texture; Emissions; Abrasion wear model; NORTRIP; PM10; Particles; Stone Mastic Asphalt – SMA; Porous Pavements; Double Layered Porous Asphalt Concrete – DLPAC; Road traffic noise; Rolling Resistance; Friction; Holistic; Function; Functional properties; Functional demands; Temporal variation; Spatial variation; Vägdamm; Vägslitage; Dubbdäcksslitage; Textur; Emissioner; Slitagemodell; NORTRIP; PM10; Partiklar; Asfaltsbetong; stenrik - ABS; Dränerande beläggning; Dubbeldränerande beläggning; Buller; Rullmotstånd; Friktion; Holistisk; Funktion; Funktionskrav; Tidsvariation; Rumsvariation; Byggvetenskap; Civil and Architectural Engineering; Building Materials; Byggnadsmaterial;

    Sammanfattning : Luftburna partiklar (PM) är ett problem för människans hälsa, där flertalet samband mellan negativa hälsoeffekter finns mellan luftföroreningar finns, bland annat för respiratoriska sjukdomar, lungcancer och kardiovaskulära sjukdomar med flera. I länder där dubbdäck används, till exempel Sverige, Finland och Norge, och sandning av vägar och gator genomförs vintertid för att säkerställa god friktion kommer en betydande andel av partiklarna från vägslitage och nedkrossning av sand vilket bidrar till PM10. LÄS MER