Sökning: "compounds"

Visar resultat 16 - 20 av 3033 avhandlingar innehållade ordet compounds.

1. 16. Tunable Magnetic Properties of Transition Metal Compounds

   Författare :Solveig Felton; Per Nordblad; Peter Svedlindh; John Chapman; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Magnetic properties; Transition metal compounds; Magnetic structure; Domain structure; SQUID-magnetometry; MFM; Magnetism; Magnetism;

   Sammanfattning : The magnetic properties of transition metal compounds have been studied using SQUID-magnetometry, magnetic force microscopy and Lorentz transmission electron microscopy. New magnetic materials have been found and their magnetic properties have been determined. How the magnetic properties of a material can be changed through e.g. LÄS MER

3. 17. Lignin Model Compounds: Synthesis, Stereochemistry and Acidolysis

   Författare :Shiming Li; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; boric acid complexes; Arylglycerol b-aryl ethers; stereochemistry; 3-Diaryl-2-propen-1-ols; 1; Phenylcoumarans; lignin model compounds; acidolysis; ion-exchange chromatography; 3-propanediols; 2-Diaryl-1; 2; X-ray crystallography;

   Sammanfattning : Lignin model compounds representative of structural elements in lignin of the b-1, b-5, b-O-4, cinnamaldehyde and cinnamyl alcohol types were synthesized. erythro-Forms of b-1 models of the 1,2-diaryl-1,3-propanediol type were prepared by BF3-catalyzed rearrangement of chalcone epoxides and subsequent reduction of the rearrangement products with NaBH4. LÄS MER

4. 18. Development and Applications of Hypervalent Iodine Compounds : Powerful Arylation and Oxidation Reagents

   Författare :Nazli Jalalian; Berit Olofsson; Viktor V. Zhdankin; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hypervalent iodine compounds; diaryliodonium salts; oxidation; Koser s reagent; arylation; phenols; diaryl ethers; chemoselectivity; organisk kemi; Organic Chemistry;

   Sammanfattning : The first part of this thesis describes the efficient synthesis of several hypervalent iodine(III) compounds. Electron-rich diaryliodonium salts have been synthesized in a one-pot procedure, employing mCPBA as the oxidant. Both symmetric and unsymmetric diaryliodonium tosylates can be isolated in high yields. LÄS MER

5. 19. Sustainable management of dredged sediments : potential recovery of valuable compounds

   Författare :Laura Ferrans; William Hogland; Monica Odlare; Linnéuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dredged sediments; nutrients; metals; speciation; recovery; characterisation; beneficial use; life cycle assessment; extraction; plant-growing substrate; circular economy; Miljövetenskap; Environmental Science;

   Sammanfattning : Dredging of sediments occurs worldwide to increase water depth in harbours, bays, lakes and rivers, as well as to recover aquatic ecosystems. Landfilling and open-ocean discharge are traditional disposal routes for dredged material. However, the methods are restricted by environmental and legal concerns. LÄS MER

7. 20. De sammansatta ordens accentuering i Skånemålen

   Författare :Mathias Strandberg; Staffan Fridell; Tomas Riad; Lars-Olof Delsing; Uppsala universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; tonal word accent; tone accent; word accent; accent 1; accent 2; stress; second-element stress; compounds; compound words; Scanian; dialects; Swedish; etymology; syncope; loanwords; borrowing; ordaccent; tonaccent; accent 1; accent 2; betoning; efterledsbetoning; sammansättningar; sammansatta ord; skånska; dialekter; svenska; etymologi; synkope; lånord; Nordiska språk; Scandinavian Languages;

   Sammanfattning : Swedish has a contrast between two so-called tonal word accents: accent 1 and accent 2. In central standard Swedish, for example, compound words generally have accent 2 and primary stress on the first element. LÄS MER