objectives: a reduction in bond strength of composite to bleached enamel has been reported immediately after bleaching treatment. application of some antioxidant agents may decrease the adverse effects of whitening agents on bond strength and enhance composite bond to enamel. this study aimed to assess the effect of green tea, sodium ascorbate, sage and grape seed extract on bond strength of co...

Thin-layer chromatographic method, with postchromatographic derivatization, was applied for the purposes of the quality control of pharmaceutical preparations, containing S. officinalis L. extract. Six finished products underwent the analysis: capsules, tablets, two ointments, tincture and finished product being a mixture of ethanolic S. officinalis and Thymi vulgaris extracts. Chromatographic ...

In this paper, a new Ultra Wideband (UWB) channel estimation algorithm, UWB-SAGE (Space Alternating Generalized Expectation Maximization) is proposed. In the algorithm, a novel UWB signal model which is an extention of the conventional wideband signal model is employed in order to estimate the UWB channel with SAGE algorithm. The algorithm divides the measured data into individual ray paths and...

In this work we introduce a novel metric for characterizing the double-directional propagation environment and use this metric to assess the performance of a SAGE parameter estimator for MIMO channels. Using the IlmProp, a geometry-based MIMO channel model, we construct synthetic channels for three different scenarios showing: (i) well separated, dense clustered propagation paths with single-bo...

We have developed a question-answering system Metis with natural-language interface. Metis generates the answer to a question by comparing the semantic graph of the question sentence with sentences discovered on the Internet as knowledge source. Specifically, we first get a set of semantic frames for the question sentence, as the output from a semantic analysis system, SAGE. Then we extract sev...

In this paper, a new Ultra Wideband (UWB) channel estimation algorithm, UWB-SAGE (Space Alternating Generalized Expectation Maximization) is proposed. This algorithm is an extension of conventional SAGE algorithm which is often adopted for wideband channel estimation. The algorithm divides the measured data into individual ray paths and estimates the directions of arrival, propagation time, and...

The studies on antibacterial activity of 16 samples Salvia stepposa (steppe sage) ethanolic extracts, an indigenous plant Central Kazakhstan, against Staphylococcus aureus (ATCC 6538), Bacillus subtilis 6633), Escherichia coli 25922), Candida albicans 10231) were assayed. Leaves and flowers extracted by ethanol 30, 40, 70 90 % using conventional microwave extraction. Antibacterial screening per...

Aflatoxins (AFs) are a group of highly toxic mycotoxins mainly produced by Aspergillus flavus and parasiticus, which considered natural contaminants food feed to the liver, carcinogens mutagenic. Therefore, reducing their toxicity in body organism is great importance. In this study, aqueous extract leaves was evaluated (green Tea sage) reduce caused aflatoxins. Two concentrations aflatoxins (0....