Search for dissertations about: "repulsive charge"

Showing result 1 - 5 of 23 swedish dissertations containing the words repulsive charge.

2. 1. SOD1´s Law : An Investigation of ALS Provoking Properties in SOD1

   Author : Roberth Byström; Gerhard Gröbner; Stefan Marklund; Mikael Oliveberg; Bengt-Harald Jonsson; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ALS; amyotrophic lateral sclerosis; SOD1; protein folding; membrane interaction; aggregates; survival time; repulsive charge; Biochemistry; Biokemi;

   Abstract : Proteins are the most important molecules in the cell since they take care of most of the biological functions which resemble life. To ensure that everything is working properly the cell has a rigorous control system to monitor the proper function of its proteins and sends old or dysfunctional proteins for degradation. READ MORE

4. 2. The Influence of Polyelectrolytes on the Stability of Colloids

   Author : Lena Sjöström; Biofysikalisk kemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; electrostatic interaction; charge reversal; colloid; asymmetric systems; electric double layer; polyelectrolyte; Monte Carlo; Physical chemistry; Fysikalisk kemi;

   Abstract : The interaction between two colloids with grafted polyelectrolytes in aqueous solution is studied within the primitive model by Monte Carlo simulations. For neutral colloids with grafted polyelectrolytes and in absence of salt the interaction is strongly repulsive in absence of salt. READ MORE

5. 3. Polymer Mediated Surface Forces

   Author : Martin Turesson; Beräkningskemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Polyelectrolyte Solutions; Charge Inversion; Monte Carlo Simulations; Depletion Stabilization; Correlation Attraction; Colloid stability;

   Abstract : The issue of controlling the stability between colloidal particles in solution is important, at least for industrial applications, relying on efficient flocculation or stable dispersions. The objective of this thesis is to shed some light on fundamental mechanisms behind the interplay between attractive and repulsive forces, in solutions containing colloids and polymers. READ MORE

6. 4. Linear models for multiscale materials simulations : Towards a seamless linking of electronic and atomistic models for complex metal oxides

   Author : Akshay Krishna Ammothum Kandy; Peter Broqvist; Jolla Kullgren; Eddie Wadbro; Ben Hourahine; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Force fields; Electronic structure calculations; CCS; DFTB; CCS Q; repulsive fitting; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

   Abstract : Multiscale modelling approaches, connecting data from electronic structure calculations all the way towards engineering continuum models, have become an important ingredient in modern materials science. Materials modelling in a broader sense is already amply used to address complex chemical problems in academic science, but also in many industrial sectors. READ MORE

7. 5. Femtosecond Dynamics and Photochemistry in Solution

   Author : Marcus Rasmusson; Kemisk fysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry; cross-correlation function; chloroiodomethane; dihalides; bromobenzene; ion pairs; solvation; vibrational relaxation; charge-transfer; tetranitromethane; electron transfer; femtosecond spectroscopy; dissociation; Photochemistry; Fotokemi; Chemical technology and engineering; Kemiteknik och kemisk teknologi;

   Abstract : The reaction dynamics of several polyatomic systems have been investigated in solution by femtosecond spectroscopy. Tetranitromethane-naphtalene complexes excited in the charge-transfer band at 400 nm undergo dissociative electron transfer, resulting in three primary products: [naphthalene].+, NO2 and C(NO2)3-. READ MORE