Sökning: "microorganisms"

Visar resultat 21 - 25 av 607 avhandlingar innehållade ordet microorganisms.

1. 21. Electric DNA chips for determination of pathogenic microorganisms

   Författare :Yanling Liu; Sven-Olof Enfors; Thomas Schweder; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electric DNA chip array; fast determination; virulence genes; multiplexed gene detection; bacterial colony; ultrasonication; DNA fragmentation; Bacillus cereus; Biology; Biologi; Bioengineering; Bioteknik;

   Sammanfattning : Silicon-based electric DNA chip arrays were utilized to fast identify pathogenic microorganisms with respect to the capacity to produce toxins involved in foodborne poisoning and infections. Bacteria of the B. cereus and the enterohemorrhagic E. LÄS MER

3. 22. Fossilized microorganisms in volcanic rocks from sub-seafloor environments

   Författare :Magnus Ivarsson; Nils Holm; Sten Lindblom; Curt Broman; Harald Furnes; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Microfossils; hydrothermal systems; deep biosphere; Other earth sciences; Övrig geovetenskap; Mineralogy; Petrology and Geochemistry; mineralogi; petrologi och geokemi;

   Sammanfattning : Fossilized microorganisms are focused in this thesis. Such organisms have been observed in drilled basalt samples from the Emperor Seamounts in the Pacific Ocean collected during ODP (Ocean Drilling Program) Leg 197. LÄS MER

4. 23. Quantitative monitoring of microorganisms in environmental samples using biomarkers

   Författare :Annelie Elväng; James Prosser; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biokemi; Biochemistry;

   Sammanfattning : The use of microorganisms in environmental biotechnology is an area of growing interest. Microorganisms have been used for diverse applications, such as biological fertilizers, biological pesticides and bioremediation of toxic chemicals. In many cases, the bacteria of interest have been genetically alterred to improve certain traits. LÄS MER

5. 24. Dynamics of root microorganisms in closed hydroponic cropping systems

   Författare :Anna Karin Rosberg; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Sammanfattning : Greenhouse production of vegetables in closed hydroponic cropping systems is a resource-efficient technique for the production of high-quality produce with a high yield per unit area. While this type of cropping system allows savings in terms of water and nutrient use, the recirculation of water increases the risk of pathogen dispersal. LÄS MER

7. 25. PCR-based detection of microorganisms in complex biological samples

   Författare :Pär-G Lantz; Teknisk mikrobiologi; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Density gradient centrifugation; DNA extraction; Aqueous two-phase systems; Meat; Faeces; Cheese; Yeast; Helicobacter pylori; Yersinia enterocolitica; Listeria monocytogenes; PCR; Inhibition; Sample preparation; Microbiology; bacteriology; virology; mycology; Mikrobiologi; bakteriologi; virologi; mykologi;

   Sammanfattning : The detection of microorganisms by PCR can be divided into four steps: (1) sample collection, (2) sample preparation, (3) DNA amplification and (4) detection of PCR products. The major problem in developing PCR-based detection methods is the sample preparation step. LÄS MER