Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"X-ray irradiation"”.
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Gamma and X-ray Irradiation Improve Postharvest Shelf-Life in 'Bartlett' Pears
… was to investigate the effects of gamma and x-ray treatment on ‘Bartlett’ pear physiology during postharvest storage. Freshly harvested ‘Bartlett’ pears were irradiated with gamma irradiation at 0.412 and 0.819 kGy and x-ray irradiation at 1.03 and 1.94 kGy, then stored at 0-1 ⁰C and 95% …
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Radiobiological and microdosimetric evaluation of proton FLASH versus conventional proton and conventional X-ray irradiation. A comparative study on cell survival and DNA damage
… για τον χαρακτηρισμό της δέσμης του θαλάμου X-ray και του Κέντρου Θεραπείας Πρωτονίων του Τρέντο (TPTC). Πραγματοποιήθηκε μικροδοσιμετρική ανάλυση και η Σχετική Βιολογική Αποτελεσματικότητα (RBE) εκτιμήθηκε χρησιμοποιώντας το Μικροδοσιμετρικό Κινητικό Μοντέλο (MKM) και το Γενικευμένο Στοχαστικό …
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Effect of Low Dose Irradiation on Expression of Genes Involved in Ethylene Biosynthesis of 'Granny Smith' Apples
… ethylene production. In apples, low dose irradiation induced ethylene reduction appears to be directly related to prevention of superficial scald. However, the molecular basis of such an irradiation induced effect is not known. In this study, effort was made to better understand the …
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Dynamical perspective of stability in glasses
… with thermo-mechanical treatments including X-ray irradiation and high-pressure compression. Vibrational dynamics are characterized through the vibrational density of states measured by Nuclear Resonant Analysis of Inelastic X-ray Scattering and Raman spectroscopy, while slow relaxation …
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RADIATION-INDUCED CHROMOSOME INSTABILITY AND INTERCELLULAR COMMUNICATION: THE ROLE OF DOSE RATE AND IMPLICATIONS FOR CARCINOGENESIS
… as radiation quality, on RIGI. For low-LET x-rays, the induction of RIGI in normal primary human fibroblast (HF19) cells was investigated as a function of dose and dose rate and as a function of dose for high-LET alpha-particles. An additional aim was to investigate the potential role of …
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X-ray Induced Changes in Electronic Properties of Stabilized Amorphous Selenium Based Photoconductors
… are important materials for flat panel digital X-ray detectors. The performance of the X-ray detector is directly related to the carrier mobility and carrier-trapping lifetime of amorphous selenium and its alloy. An experiment was conducted to examine the dose rate effects on the carrier-trapping …
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Low dielectric constant fluorocarbon films containing silicon by plasma enhanced chemical vapor deposition
… of SiCF films by wet chemical treatment and by X-ray irradiation were examined to facilitate copper metallization. Feasibility of copper deposition by recently developed electroless techniques is discussed in conjunction with the studies utilizing wet chemical modification of the film surface. The …
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Paramagnetic resonance of transition group ions in crystals with the fluorite structure
… in the valence' state of the paramagnetic ion. X-ray irradiation of the CaF2 sample doped with Co by diffusion changes the sample to red, but no Co^ + ions are observed. Attempts to convert the cubic spectra to trigonal ones by oxidation and hydrolysis do not yield any result.
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X-ray induced temperature dependent amorphous-amorphous transitions in the GeO2 glass
… thesis investigates the effects of intense X-ray irradiation on vitreous germanium dioxide (v-GeO2), a prototypical strong oxide glass, by combining X-ray photon correlation spectroscopy (XPCS), X-ray diffraction (XRD), and inelastic X-ray scattering (IXS). The results demonstrate that intense …
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Impact of Phytosanitary Irradiation on Polar Antioxidants in Peels of ‘Granny Smith’ Apples
… to evaluate the effects of gamma, e-beam, and X-ray irradiation on phenolic compounds, vitamin C content, and total antioxidant capacity in ‘Granny Smith’ apple peels. The results indicated that there were no significant changes in vitamin C content immediately following irradiation. However, …
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Spectroscopy versus turbidity: non-invasive in vivo monitoring of living systems
… research focused on observing the effects of x-ray irradiation on bone. Differences between control bones, irradiated bones, and the contra-lateral limb of the irradiated bones were assessed using depolarization ratios and other Raman spectral markers to assess internal effects of the radiation …
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Molecular Mechanisms of DNA Protection by Tardigrade Damage Suppressor Protein (Dsup): Structural Adaptation and Functional Interactions
… adaptation. Experimental results confirm that X-ray irradiation did not compromise the integrity or cause additional oxidative damage to free DNA in the presence of Dsup in DNA-protein mixture. These features enable dynamic structural transitions upon DNA binding, forming an electrostatic and …
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A tri-modality x-ray fluorescence, x-ray luminescence, x-ray transmission computed tomography imaging platform for monitoring and stimulating metal-containing nanoparticles
X-ray-activated photodynamic therapy (X-PDT) techniques have gained traction for its potential to impart therapeutic effects at greater depths than possible with traditional photodynamic therapy [1], [2]. Interestingly, the underlying X-PDT process could also generate X-ray fluorescence (XF) with …
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The evaluation of targeted radionuclide therapies and radio sensitising agents in malignant melanoma
… repair and IKKβ Inhibitors in combination with X-Ray radiation to determine suitability for future targeted radiotherapy/drug combination therapy approaches. Results: [131I]MIP1145 demonstrated accumulation and retention accompanied by considerable reductions in cell survival and tumour burden in …
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A combined EMR and DFT study of radiation-induced defects in sucrose and glucose 1-phosphate
… with a detailed study of radicals induced by X-ray radiation in solid sucrose (also known as common household sugar) and in the dipotassium salt of glucose 1-phosphate (K2G1P). The radiation chemistry of these materials is relevant in the context of radiation damage to DNA and (emergency) …
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The Role of Mesenchymal Cells in the Regeneration of Salivary Gland Tissue
… attempting to investigate the impact of x-ray irradiation exposure on the tissue. Furthermore, the technique could possibly be extrapolated to other tissue types to aid the understanding of the effect of other autoimmune conditions on their target tissues. In conclusion, this project shows …
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Ion dosimetry for radiobiology experiments employing laser-accelerated beams
… to the laser-accelerated protons compared with x-ray irradiation, but human umbilical endothelial vein (HUVEC) cells are indeed more dose-rate sensitive. It also revealed that for both cell lines, there appears to be a higher degree of early-response damage (up to 1 hour post-irradiation) for the …
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PTEN regulates the BMI1-mediated self-renewal of long-term hematopoietic stem cells in developmental and stress conditions
… of BMI1 by PTEN and p38α under stress, an X-ray irradiation murine model was employed. The 3 Gy irradiation led to a decrease in the BMI1 protein levels in response to irradiation, which was accompanied by the increased reactive oxygen species at 14 days post-irradiation. The irradiated HSCs …
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Radiation-induced genomic instability and cellular communication: mechanistic investigations
… of cells and tissue following irradiation. Although GI is thought to be a critical step in the onset and progression of cancer, BE response contributions in such processes are still not clear. Therefore, this study was designed to investigate the risks or benefits associated …
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