On the basis of World Health Organization (WHO) reports among all types of tumor malignant brain tumors are most dangerous tumor. Every year lot of individuals lost their life because of either misjudgement in analysis of tumor type in its early stage or unpredictable
tumor type at first sight. Proper identification for these tumors in their early stage is an extremely difficult clinical task that must depend upon information gathered through non-invasive ZD1839 techniques like biopsy and spectroscopy. In this paper a new hybrid feature extraction mechanism is proposed which help in classification of malignant tumors like Central Neuro Cytoma (CNC), Glioblastoma Multiforme (GBM), Gliomas, Intra Ventricular Malignant Mass, Metastasis in its early stage of development. The proposed feature extraction mechanism uses the shape and textural features for classification of malignant tumors. Among the extracted features, relevant features are identified using cumulative frequency based features selection mechanism. K-Nearest DMH1 concentration Neighbour (KNN), a supervised classification, algorithm is used for analysis of the results. For experimental purpose
150 brain tumors MR images are used having 30 images each for Central Neuro Cytoma, Glioblastoma Multiforme, Gliomas, Intra Ventricular Malignant Mass, Metastasis. The classification accuracy achieved for each type of malignant tumors are 90%, 93%, 93%, 90%, 93%. The overall accuracy achieved is nearly 92% for whole dataset of malignant brain MR images.”
“Background and Aims. The space environment could have impacts on a variety of characteristics of microorganism such as cell metabolism, drug resistance, and virulence. However, relevant mechanisms need to be clarified.
In the present study, the effect of a space Alvespimycin chemical structure environment on Escherichia coli was investigated. Methods. E. coli strains were sent to space for 398 h on the Shenzhou VIII and ground simulation was conducted as control. After the flight, a mutant strain LCT-EC67 was selected for further analysis. Results. Although no changes in hemolysis, morphology or antibiotic sensitivity were observed, the mutant strain showed elevated carbon source utilization compared with the control group. Genomic and proteomic analyses showed that 801 genes were upregulated and 825 genes were downregulated. In addition, 167 proteins were overexpressed and 92 proteins were downregulated using a cut-off fold-change value of 1.4 and a p smaller than 0.05. The changed proteins were associated with metabolic functions such as alanine and glutamate metabolism, arginine and proline metabolism, and fatty acid and propanoate metabolism. Conclusions. E. coli showed alterations at gene and protein levels mainly regarding biochemical metabolism after spaceflight. (C) 2015 IMSS. Published by Elsevier Inc.”
“Background: The protective effect of physical activity on breast cancer risk might be mediated by sex hormone levels.