Sökning: "negative ions"

Visar resultat 21 - 25 av 126 avhandlingar innehållade orden negative ions.

1. 21. Mitochondrial function in human skeletal muscle: with special reference to exercise and training

   Författare :Michail Tonkonogi; Högskolan Dalarna; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :aerobic metabolism; oxidative phosphorylation; mitochondria; oxygen utilisation; citrate synthase; ADP sensitivity; ATP; muscle fibres; hydrogen ions; lactate; free radicals; proton leak; uncoupling; exercise; aerobic metabolism; oxidative phosphorylation; mitochondria; oxygen utilisation; citrate synthase; ADP sensitivity; ATP; muscle fibres; hydrogen ions; lactate; free radicals; proton leak; uncoupling; exercise;

   Sammanfattning : The overall objective of this thesis was to study the adaptation of oxidative function in human skeletal muscle to acute exercise of different modes, intensities and durations, and to endurance training. The effects of endurance training on mitochondrial function were evaluated in cross-sectional and longitudinal studies by measurements of mitochondrial oxygen consumption in isolated mitochondria and permeabilised muscle fibres and measurements of mitochondrial ATP production rate in isolated mitochondria. LÄS MER

3. 22. The influence of high temperature on the discoloration and degradation of carbohydrates and on hydrogen peroxide bleaching of spruce TMP

   Författare :Louise Logenius; Hans Höglund; Roland Agnemo; Mittuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Temperature; metal ions; cellulose; glucuronic acid; UV-Vis spectroscopy; spruce; TMP; hydrogen peroxide bleaching; spectroscopy; optical properties; Chemical engineering; Kemiteknik;

   Sammanfattning : When processing wood to obtain pulp, the fibers are subjected to high temperatureat moisture levels and to the influence of metal ions. Many process developmentshave resulted in utilization of higher temperatures that induce chemical reactionsin the wood fibers. This thesis deals with some aspects of using high temperaturesin pulping processes. LÄS MER

4. 23. Time-Resolved Spectroscopy and Intensity Measurements of Singly Charged Ions

   Författare :Erik Bäckström; Sven Mannervik; Andreas Wolf; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fysik; Physics;

   Sammanfattning : This thesis is mainly concerned with investigations of spontaneous radiatively decaying states in both negative and positive singly charged ions. When possible, the measured lifetime of the state has been combined with branching fractions in order to derive the absolute transition probability (A-value) between different quantum states. LÄS MER

5. 24. Studies on cell wall recycling and modification in Gram-negative bacteria

   Författare :Michael C. Gilmore; Felipe Cava; Peter A Lind; Teresa Frisan; Jean-François Collet; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Peptidoglycan recycling; bacterial cell wall; antibiotics; Agrobacterium tumefaciens; Escherichia coli; Legionella pneumophila; mikrobiologi; Microbiology; Biochemistry; biokemi;

   Sammanfattning : The bacterial cell wall is made from peptidoglycan (PG), a heteropolymer which forms a bag-like exoskeleton that envelopes the cell. PG is constantly remodelled during growth and division, and in response to environmental stimuli. LÄS MER

7. 25. Insights into Stability Aspects of Novel Negative Electrodes for Li-ion Batteries

   Författare :Hanna Bryngelsson; Kristina Edström; Stefania Panero; Uppsala universitet; []
   Nyckelord :Inorganic chemistry; Li-ion batteries; anode materials; Sb; Cu2Sb; electrodeposition; Oorganisk kemi;

   Sammanfattning : Demands for high energy-density batteries have sharpened with the increased use of portable electronic devices, as has the focus global warming is now placing on the need for electric and electric-hybrid vehicles. Li-ion battery technology is superior to other rechargeable battery technologies in both energy- and power-density. LÄS MER