Sökning: "Primary reactions"

Visar resultat 1 - 5 av 245 avhandlingar innehållade orden Primary reactions.

1. 1. Fast pyrolysis of biomass : primary products and reaction pathways

   Författare :David Usino; Tobias Richards; Weihong Yang; Högskolan i Borås; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fast pyrolysis; Py-GC-MS FID; Primary reactions; Cellulose; Xylan; Lignin; Birch wood; Co-pyrolysis; Mahogany; Iroko; Palm kernel shell; Biomass blend; Biomass interaction; Pretreatment; Resource Recovery; Resursåtervinning;

   Sammanfattning : Pyrolysis of biomass to produce liquid fuel and chemicals has been considered as an alternativeto fossil fuel because biomass has a lower environmental impact; moreover, it is renewable andcould be sustainable. However, the process of bio-oil production involves a series of complexchemical reactions which are dependent on the biomass feedstock and composition,temperature, heating rate as well as residence time. LÄS MER

3. 2. Reactions of aqueous radiolysis products with oxide surfaces : An experimental and DFT study

   Författare :Cláudio Miguel Lousada Patrício; Mats Jonsson; Jean-Philippe Renault; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; hydrogen peroxide; hydrogen production; metal; oxides; lanthanide; catalysis; density functional theory; surface; reactions; chemistry; SRA - Energy; SRA - Energi; SRA - Production; SRA - Produktion;

   Sammanfattning : The reactions between aqueous radiolysis products and oxide surfaces are important in nuclear technology in many ways. In solid-liquid systems, they affect (and at the same time are dependent on) both the solution chemistry and the stability of materials under the influence of ionizing radiation. LÄS MER

4. 3. Multicomponent Reactions in 11C/12C Chemistry : – Targeting the Angiotensin II Subtype 2 Receptor

   Författare :Marc Stevens; Luke Odell; Mats Larhed; Gunnar Antoni; Sergio Estrada; Ola Åberg; Neil Vasdev; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; carbonylation; positron emission tomography; multicomponent reactions; AT2R; 3; 4-dihydroquinazolinone; sulfonyl azides; Farmaceutisk vetenskap; Pharmaceutical Science;

   Sammanfattning : Section 1 of this thesis contains an introduction to method development in organic synthesis, multicomponent reactions, sulfonyl azides, tracer development in 11C chemistry and the biological target.Section 2 describes the use of sulfonyl azides in carbonylative chemistry. Paper I covers development of a diazotransfer protocol. LÄS MER

5. 4. Erythema Migrans in Primary Health Care

   Författare :Louise Bennet; Allmänmedicin och samhällsmedicin; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; primary health care; ticks; gender; climate; Medicine human and vertebrates ; Medicin människa och djur ; serology; Immunology; serologi; Immunologi; transplantation; Infections; Infektioner; General practice; medicinsk utbildning; medical training; Allmän medicinsk utövning; Lyme borreliosis; erythema migrans; incidence; Borrelia afzelii; Borrelia garinii;

   Sammanfattning : Lyme borreliosis (LB) is the most common vector-borne disease in the northern hemisphere, and southern Sweden is a highly endemic area. In over 70% of the cases, LB is represented by the non-disseminated cutaneous form erythema migrans (EM). LÄS MER

7. 5. Amine Transaminases in Multi-Step One-Pot Reactions

   Författare :Mattias Anderson; Per Berglund; Frank Hollmann; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biocatalysis; enzyme; amine transaminase; ω-transaminase; amination; primary amine; chiral amine; chemoenzymatic; green chemistry; synthesis; cascade; Bioteknologi; Biotechnology;

   Sammanfattning : Amine transaminases are enzymes that catalyze the mild and selective formation of primary amines, which are useful building blocks for biologically active compounds and natural products. In order to make the production of these kinds of compounds more efficient from both a practical and an environmental point of view, amine transaminases were incorporated into multi-step one-pot reactions. LÄS MER