نتایج جستجو برای: aberrations
تعداد نتایج: 17220 فیلتر نتایج به سال:
PURPOSE To relate the change of ocular aberrations with the change of visual performance produced by standard laser in situ keratomileusis (LASIK) for myopia. METHODS Aberrations and visual performance were measured before and after surgery in 22 eyes. Total aberrations were measured using a laser ray tracing technique. Corneal aberrations were obtained using a commercial videokeratoscope and...
Chinese hamster primary embryonic cells (at G1 phase) were treated with 1.0 or 3.0 microg/ml bleomycin and chromosomal aberrations in first division metaphases were analysed by fluorescence in situ hybridization (FISH) using arm-specific painting probes for chromosomes 3, 4, 8 and 9. We observed that bleomycin induced all classes of chromosome-type aberrations very efficiently. The interesting ...
P53 mutations are associated with invasive tumors in mouse models. We assessed the p53mutations and survival in patients with advanced cancer treated in the Phase I Program. Of 691 tested patients, 273 (39.5%) had p53 mutations. Patients with p53 mutations were older (p<.0001) and had higher numbers of liver metastases (p=.005). P53 mutations were associated with higher numbers of other aberrat...
The impact of intraocular scatter and higher order aberrations (HOAs) on ocular optical quality was investigated. An eye model constructed using the measured aberrations, corneal surfaces, axial length, fraction, HOAs modulation transfer functions (MTFs) studied based newly established model. For uniform scatter, monochromatic polychromatic MTF decreased as or fractions increased independently ...
The mammalian in vivo chromosome aberration test is used for the detection of structural chromosome aberrations induced by the test substance to the bone marrow cells of animals, usually rodents (1)(2)(3)(4). Structural chromosome aberrations may be of two types, chromosome or chromatid. An increase in polyploidy may indicate that a chemical has the potential to induce numerical aberrations. Wi...
Chromosomal aberrations and dihydrofolate reductase gene amplification are observed in L5178Y mouse lymphoma cells after treatment with hydroxyurea. The types of aberrations include polyploidy, endoreduplication, chromosome fragmentation, and the presence of extrachromosomal DNA. Hydroxyurea-treated cells analyzed by cell sorting showed a subpopulation of cells with increased DNA and increased ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید