Results 261 to 270 of about 1,244,178 (311)

Mechanisms of damage formation in semiconductors

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2009
The damage accumulation in ion-implanted semiconductors is analysed using Rutherford backscattering spectrometry (RBS). When energetic ions are implanted in a material, they transfer their energy mainly into atomic collision processes (nuclear energy loss) and in electronic excitations (electronic energy loss).
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DNA Damage Focus Formation Assay

2019
Advanced techniques allow investigating cellular DNA damage measurements. Ionizing radiation produces multiple DNA damages. Among them, DNA double strand breaks are most toxic to cells. DSBs can form mutations, chromosome aberrations, and cell killing.
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[Role of DNA damage in the formation of radiation damage to chromosomes].

Radiobiologiia, 1986
The data are reviewed on the role of various DNA lesions in the formation of structural damages to chromosomes. The concepts are developed that the molecular damages to nuclear DNA induce chromosome mutagenesis.
E E, Ganassi, S I, Zaichkina, O M, Rozanova   +2 more
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Prevention and Control of Formation Damage

Proceedings of SPE Oklahoma City Regional Meeting, 1977
WELL COMPLETION All wells are susceptible to formation damage at any time during the life of a well. Some damage sources are drilling fluids, cement filtrates, water and/or emulsion blocking, oil wetting of silicate surfaces, "dirty" treating fluids, and clays.
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Formation Damage in Heavy-Oil Formation During Steamflooding

Proceedings of SPE Asia-Pacific Conference, 1991
Abstract An experimental study was undertaken to examine formation damage due to plugging caused by precipitates and scales generated from the dissolution of silicate compounds and associated minerals. The experimental tests include: roller oven tests, petrographic, SEM and EDEX studies. The tests were carried out at various temperatures
C. U. Okoye, N. L. Onuba, A. Ghalambor, A. Hayatdavoudi   +3 more
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Formation and repair of oxidative damage in the mitochondrial DNA

Mitochondrion, 2014
The mitochondrial DNA (mtDNA) encodes for only 13 polypeptides, components of 4 of the 5 oxidative phosphorylation complexes. But despite this apparently small numeric contribution, all 13 subunits are essential for the proper functioning of the oxidative phosphorylation circuit.
Meltem, Muftuoglu, Mateus P, Mori, Nadja C, de Souza-Pinto   +2 more
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Formation Damage

2022
Mohammed Ismail Iqbal, Shohaib Khan
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Technology Focus: Formation Damage

Journal of Petroleum Technology, 2018
Technology Focus Coreflooding is one of the principal tools through which we qualify drilling and completion fluids and assess the potential for formation damage, but is it relevant? By “relevant,” I mean does it give an accurate portrayal of the likely performance of the selected fluids in terms of potential damage and how effectively a
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Formation Damage by CO2-Induced Asphaltene Precipitation

SPE International Symposium and Exhibition on Formation Damage Control, 2006
Abstract To increase productivity from crude oil reservoirs, carbondioxide (CO2) is usually injected during secondary and/or tertiary recovery. While CO2 injection significantly increases the amount of oil recovered, it causes asphaltene deposition at high concentrations.
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Microstructural Damage In Cotton Valley Formation Cores

SPE Annual Technical Conference and Exhibition, 1979
Abstract Rock core samples are routinely used in the oil and gas industry to analyze in situ rock properties. In this study, we have examined the effects of coring on rock properties by studying the microstructures of cored samples from depths of 8500 feet to 9200 feet (2,582 M to 2,804 M) in the Cotton Valley ...
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