High-resolution Fourier transform nuclear magnetic resonance was used to observe the natural abundance (13)C spectrum of a 0.02 M solution of bovine pancreatic ribonuclease A. Peaks assignable to only three carbons were easily observed after 10 hr of signal averaging. A number of tentative assignments were made. As expected, the (13)C spectrum was appreciably richer in detail than the correspon...

We study the energy spectrum of bottomonium in perturbative QCD, taking α s (M Z) = 0.1181 ± 0.0020 as input and fixing m MS b (m MS b) on the Υ(1S) mass. Contrary to wide beliefs, perturbative QCD reproduces reasonably well the gross structure of the spectrum as long as the coupling constant remains smaller than one. We perform a detailed analysis and discuss the size of non-perturbative effec...

Let (V,B) be a DB(k, λ; v) and (W, C) be a DB(k′, λ′; v′). If V ⊂ W and C|V = B, i.e. B = {B : B ∈ C, B ⊂ V }, we call (V,B) is embedded in (W, C). In this paper, we estimate the embedding spectrum of DTS(v) when k = 3, k′ = 4, λ = λ′ = 1. We also determine the embedding spectrum of DTS(v) with small orders.

how to cite this article: babaknejad n, sayehmiri f, sayehmiri k, mohamadkhani a, bahrami s. the relationship between zinc levels and autism: systematic review and meta-analysis. iran j child neurol. autumn 2016; 10(4):1-9.   abstract objective autism is a complex behaviorally defined disorder. there is a relationship between zinc (zn) levels in autistic patients and development of pathogenesis...

objectives: autism spectrum disorder (asd) is a group of neurodevelopment syndromes with impairments in social communications and restrictive or repetitive behaviors. neurofeedback is a new method that may regulate neuro and metabolic function in brain. this study is semi-experimental, with pre and post test.  methods: in 26 children with asd, 40 sessions of neurofeedback were done. brain waves...

background escherichia coli (e. coli) species are able to produce extended-spectrum β-lactamases (esbls) that cause high resistance to the beta-lactam antibiotics. therefore, determining the antibiotic susceptibility patterns in resistant organisms is necessary for suitable therapeutic approaches. patients and methods totally, 260 clinical isolates of e. coli were collected from hospitals in te...

the energy of a graph is equal to the sum of the absolute values of its eigenvalues. two graphs of the same order are said to be equienergetic if their energies are equal. we point out the following two open problems for equienergetic graphs. (1) although it is known that there are numerous pairs of equienergetic, non-cospectral trees, it is not known how to systematically construct any such pa...

background & objectives:extended-spectrum-b-lactamase (esbl)-producing strains of klebsiella pneumoniaare an important cause of many serious infections in hospitalized and nonhospitalized patients and delayed treatment of these infections in crease chance of death in patients. this study was performed to determine the prevalence of esbl-producing k. pneumonia and to evaluate the frequency o...

Stimulation period Fig.1 A representative 7T proton spectrum from a single subject:(A) averaged spectrum acquired at rest; (B) averaged spectrum acquired during stimulation; (C) difference between (A) and (B). The peaks seen at 2.01, 2.10, 2.35 and 3.03ppm in the difference spectrum are attributed to linewidth changes due to the BOLD effect as well as concentration changes of metabolites. (D) s...

In this paper a model to investigate the spectrum opportunities for cognitive radio networks in three radar frequency bands L, S and C at a specific location is introduced. We consider underlay unaware spectrum sharing model. The Secondary System we assume is an OFDM based system. The followed strategy is built upon defining a specific co or adjacent channel as a spectrum opportunity if -and on...