نتایج جستجو برای: o20
تعداد نتایج: 163 فیلتر نتایج به سال:
We report on the recording of stabilized running holograms in photorefractive materials with arbitrarily selected phase shift φ between the transmitted and difracted beams propagating along the same direction behind the photorefractive crystal. The dependence of the diffraction efficiency and of the hologram speed on φ , in such stabilized holograms, can be easily measured and used for material...
Type VI collagen is a structurally unique component widely distributed in connective tissues. Its molecular structure consists of monomers that have the potential to assemble intracellularly into dimers and tetramers which, once secreted, can form microfilaments by end-to-end association. Individual monomers are composed of chains of Mr = ~140,000 (cd and a2) and >300,000 (or3). Type VI collage...
I n a pivotal phase 3 randomized controlled trial, Hussain et al. tested the hypothesis that, with respect to survival, intermittent androgen deprivation therapy (ADT) is non-inferior to continuous in men with newly diagnosed metastatic prostate cancer. While the trial findings were statistically inconclusive, the study suggests, but does not prove, that intermittent may do more harm than good,...
I N T R O D U C T I O N The study of the ease with which clay minerals are decomposed by acids can provide useful information about the properties of clays. Many of the earlier studies in this field, reported by Nutting (1943) and Grim (1953), were carried out under rather severe conditions when compared to the natural weathering environment. Investigations of the reactions of clays with strong...
For patients with acute myeloid leukemia (AML), aged over 60 years old presenting with poor prognosis factors such as, adverse cytogenetics, previous myelodysplastic syndrome (MDS) or therapyrelated AML (t-AML), the outcome remains particularly dismal. It is generally accepted that these patients are candidates for palliative care or investigational therapy only. In such poor prognosis patients...
The results of an optical monitoring campaign on the active nucleus in the luminous Seyfert 1 galaxy Fairall 9 are presented. This campaign was undertaken in parallel with ultraviolet spectroscopic monitoring with the IUE satellite which is described in a separate paper. The primary purpose of this program is to measure the response times (or ““ lags ÏÏ) of the emission lines to continuum varia...
The recent remarkable advances in multiple myeloma (MM) therapy and outcomes have had mixed impact on patients with adverse risk genetics, many of whom continue to have inferior outcomes. This applies particularly to deletion of chromosome 17p13 [del(17p)], found in ≈10% of newly diagnosed MM (ND) and at higher prevalence in advanced disease. The TP53 gene is located within the minimally delete...
Due to the lack of specific clinical and biological features, M6a-acute erythroid leukemia (M6a-AEL), defined as an erythroid/myeloid type of acute leukemia, is no longer a distinct entity in the last classification of myeloid neoplasms by the World Health Organization (WHO). The diagnosis of M6a-AEL was previously made if a proliferation of erythroid precursors ⩾ 50% with a myeloblast count ⩾ ...
34 Optogenetics is an emerging field of neuromodulation that permits scaled, 35 millisecond temporal control of the membrane dynamics of genetically targeted 36 cells using light. Optogenetic technology has revolutionized neuroscience 37 research; however, numerous biophysical questions remain on the optical and 38 neuronal factors impacting the modulation of neural activity with photon sensiti...
There is widespread concern about the effect of the Uruguay Round policy changes on world agricultural prices and consequently upon the welfare of developing countries. Assessing welfare changes with the standard terms of trade effect calculation can be misleading for distorted economies, since the distortion effect operates in addition or in opposition to the terms of trade effect. This study ...
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