Essays about: "hypoxic"

Showing result 6 - 10 of 42 essays containing the word hypoxic.

  1. 6. Investigation of Methods to Improve PZT Sol-Gel Deposition Process for Energy Harvesting Applications

    University essay from KTH/Hälsoinformatik och logistik

    Author : Mikael Granberg; [2022]
    Keywords : PZT; sol-gel; self-polarization; seed layer; titanium oxidation; PZT; sol-gel; självpolarisering; seedlager; titanoxidering;

    Abstract : The purpose of this work was to investigate ways to modify Silex sol-gel deposition of PZT (PbZrxTi(1-x)O3, Lead Zirconate Titanate) in order to improve its properties for energy harvesting applications. A number of methods to improve the figure of merit for energy harvesting (FOM= e312/ε), cause self-polarization, increase lifetime, reduce cost, increase throughput or simplify processing were tested. READ MORE

  3. 7. Hypoxic Target Volume Determination in PET/CT Imaging : The Impact of Deformable Image Registration

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Viktor Rosenberg; [2022]
    Keywords : Positron emission tomography; image registration; hypoxic tumour volume; dose escalation; tumour control probability;

    Abstract : Using a tailored dose distribution for personalized radiotherapy with the help of positron emission tomography (PET) might give an edge for successful tumour elimination. One of the main determinants for tumour radioresistance in several solid tumours has been investigated as hypoxia, including head and neck cancer (HNC). READ MORE

  4. 8. Assessing the relationship between hypoxia and life on Earth, and implications for the search for habitable exoplanets

    University essay from Lunds universitet/Geologiska institutionen

    Author : Thomas Evan Smith; [2022]
    Keywords : hypoxia; hypoxia-inducible factors; atmospheric oxygen; multicellularity; embryogenesis; exoplanets; white dwarfs; oxygen fugacity; Earth and Environmental Sciences;

    Abstract : Atmospheric oxygen at the level of present-day Earth (21%) is generally regarded as permissive for the development and survival of complex multicellular life, such as animals. The hypothesis that oxic conditions are conducive for multicellular life has subsequently been applied to the search for life elsewhere in the universe, with planets exhibiting atmospheric oxygen of a similar level to Earth being considered as candidates for habitability. READ MORE

  5. 9. Hypoxia-induced expression of HIF-1a and GPR30, in relation to survival, proliferation and apoptosis in MCF-7 and SkBr3 breast cancer cells.

    University essay from Lunds universitet/Läkarutbildningen

    Author : Hanna Chahin; Dianna Jazera; [2021]
    Keywords : hypoxia; breast cancer; GPR30 estrogen receptor; Medicine and Health Sciences;

    Abstract : Introduction: Hypoxia that accompanies tumor growth induces the expression of hypoxiainducible factor a (HIF-1a), in turn mediating the expression of other genes, including G protein-coupled receptor 30 (GPR30), to promote adaption to the hypoxic microenvironment and enable cell proliferation and survival. Nonetheless, this correlation has not been causally explained. READ MORE

  6. 10. Evaluation of transferability of Convolutional Neural Network pre-training with regard to image characteristics

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Fanny Ekblad Voltaire; Noah Mannberg; [2021]
    Keywords : ;

    Abstract : This study evaluates the impact of pre-training on a medical classification task and investigates what characteristics if images affect the transferability of learned features from the pre-training. Cardiotocography (CTG) is a combined electronic measurement of the fetal heart rate (FHR) and maternal uterine contractions during labor and delivery and is commonly analyzed to prevent hypoxia. READ MORE