Introduction: Medical uses of radiation have grown very rapidly over in the past two decades, medical uses represent the largest source of exposure to people, The most important methods in medical diagnosis are the useses of diagnostic radiology exams. Although the use of these methods is very beneficial for the treatment of patients, but ionizing radiation produces ion pairs, ...

The use of zinc thin films deposited onto glass supports for surface plasmon coupled fluorescence (SPCF) over a broad 200 nm wavelength range is demonstrated. Fresnel calculations performed in the ultraviolet and visible spectral range are predicted to generate surface plasmon modes in 30 nm zinc thin films. In this spectral range, the extent of coupling of light to zinc thin films was shown to...

Recently, Fici, Restivo, Silva, and Zamboni defined a k-anti-power to be a word of the form w1w2 · · ·wk, where w1, w2, . . . , wk are distinct words of the same length. They defined AP (x, k) to be the set of all positive integers m such that the prefix of length km of the word x is a k-anti-power. Let t denote the Thue-Morse word, and let F(k) = AP (t, k) ∩ (2Z+ − 1). For k > 3, γ(k) = min(F(...

Methylene blue (MB) is a vital dye to allow better visualization and marker of parathyroid glands. The compound causes a toxic encephalopathy in clinical observations and some neuronal adverse effects in experimental studies. Of neurotoxic effects, reduced field excitatory postsynaptic potentials (fEPSPs) in hippocampal slice cultures and apoptosis induced in neurons by MB, suggest that MB may ...

A finite sequence u = a1a2 . . . ap of some symbols is contained in another sequence v = b1b2 . . . bq if there is a subsequence bi1bi2 . . . bip of v which can be identified, after an injective renaming of symbols, with u. We say that u = a1a2 . . . ap is k-regular if i − j ≥ k whenever ai = aj , i > j. We denote further by |u| the length p of u and by ‖u‖ the number of different symbols in u....

The problem of ranking a set of visual samples according to their relevance to a query plays an important role in computer vision. The traditional approach for ranking is to train a binary classifier such as a support vector machine (svm). Binary classifiers suffer from two main deficiencies: (i) they do not optimize a ranking-based loss function, for example, the average precision (ap) loss; a...

Uracil DNA glycosylase (UDG), a ubiquitous and highly specific enzyme, commences the uracil excision repair pathway. Structural studies have shown that the tyrosine in a highly conserved GQDPY water-activating loop of UDGs blocks the entry of thymine or purines into the active site pocket. To further understand the role of this tyrosine (Y66 in Escherichia coli UDG), we have overproduced and ch...

background: accumulating evidence indicates that inflammatory cells migrate into the pancreas tissue and play an important role in the pathogenesis of acute pancreatitis (ap). the aim of this study was to establish a flow cytometric method to enumerate these infiltrating cells in the pancreas of an experimental ap. materials and methods: twelve hours after inducing of ap, mice pancreatic tissue...

purpose : to determine add power (ap) and amplitude of accommodation (aa) in a sample of iranian population and its relationship with refractive errors methods : this cross-sectional study enrolled people of 35-70 years old by simple random sampling. exclusion criteria were myopia or hyperopia over 6 diopter (d) and astigmatism more than 0.75 d. those with a history of eye disorders and taking ...