Sökning: "DNA synthesis time"

Visar resultat 1 - 5 av 76 avhandlingar innehållade orden DNA synthesis time.

1. 1. Improvements of the Bromodeoxyuridine-DNA Flow Cytometry Method for the Study of Cell Proliferation

   Författare :Maria C Johansson; Bröstcancer-genetik; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; head and neck cancer; [3H]thymidine; energy transfer; cell cycle; xenografted tumours; cultured cells; potential doubling time; labelling index; DNA synthesis time; cell proliferation; growth kinetics; Bromodeoxyuridine; DNA flow cytometry; cancer; onkologi; Cytologi; cancerology; oncology; Cytology;

   Sammanfattning : Potential doubling time (Tpot), DNA synthesis time (TS), and labelling index (LI) are fundamental growth kinetics parameters in clinical and experimental cancer research, which may be of further practical importance regarding prognosis and treatment prediction of cancer. They can be measured by bromodeoxyuridine(BrdUrd)/flow cytometry (FCM) methods, where BrdUrd, an analogue of thymidine, is incorporated into DNA and quantified simultaneously with the DNA content. LÄS MER

3. 2. DNA Interactions with Chiral Polyaza-aromatic Ruthenium(II) Complexes

   Författare :Per Lincoln; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phenanthroline; binding geometry; binding isotherm; DNA; dppz; linear dichroism; intercalation; ruthenium; cooperative binding;

   Sammanfattning : The binding to DNA of a series of chiral ruthenium complexes is studied with optical spectroscopy techniques, including isotropic absorption, linear dichroism (LD) and emission anisotropy as well as steady-state and time-resolved luminescence. The thesis focuses on the ìlight-switchî complex [Ru(phen)2dppz]2+ which binds to DNA by intercalation and luminesces when bound to DNA but not in pure buffer solution (phen=1,10-phenanthroline; dppz=dipyrido[3,2-a:2',3'-c]phenazine). LÄS MER

4. 3. Development of Fluorescent Nucleobase Analogues - Intrinsically labelled nucleic acids for molecular binding investigations

   Författare :Mattias Bood; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; DNA; RNA; Fluorescent nucleobase analogue; FRET; pre-microRNA; isothermal titration calorimetry; surface plasmon resonance; aminoglycoside; binding interaction;

   Sammanfattning : This thesis focuses on the design, synthesis and utilization of fluorescent nucleobase analogues (FBAs). FBAs are an important class of compounds, used in the research of nucleic acids. The class of canonical FBAs, i.e. LÄS MER

5. 4. Validation of Several Nucleoside Tracers as Proliferation Markers

   Författare :Li Lu; Sven Reske; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biopharmacy; PET; cell proliferation; DNA synthesis; hydroxyurea; cimetidine; diuretic; Biofarmaci; Biopharmacy; Biofarmaci; galenisk farmaci; Pharmaceutics;

   Sammanfattning : Positron emission tomography (PET) is a powerful method for in vivo characterization of tumor biochemistry and clinically has been used for diagnosing and grading of malignancy. A key element in oncology is proliferation potential, a feature that is assumed to be an important indicator of tumor growth. LÄS MER

7. 5. Protection of Biomolecules by Antioxidants - Mechanisms and Applications

   Författare :Carl Grey; Bioteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dG; antioxidants; mass spectrometry; Analytical chemistry; Analytisk kemi; Food and drink technology; Livsmedelsteknik; Bioteknik; Biotechnology; DNA; Oxidation; Protein; Fenton reaction;

   Sammanfattning : Reactive oxygen species (ROS) consisting of various oxygen-based free radicals as well as other reactive non-radical species produced in O2-related metabolism or through other processes are involved in the oxidation of such vital biomolecules as DNA, proteins and lipids. The types of oxidation represented here are known to cause many different diseases and disorders in human beings, such as cancer, Alzheimer's disease and ageing. LÄS MER