The objective of our present work was to prepare transdermal matrix patches containing the drug, diclofenac diethylamine with various polymeric combinations of polyvinylpyrrolidone and ethylcellulose and to study the mechanism of release of the drug from the patches and its skin permeation. Sorbitan monolaurate 20 (Span 20), a non-ionic surfactant was added to the concentrations (0.1% wt/vol), ...

In this paper, classification of mammograms for breast cancer detection based on Discrete Curvelet Transform (DCT) and Multi-Layer Perceptron (MLP) is proposed. The mammogram patches are first filtered by Column wise neighborhood operations Filter (COLFILT). Enhanced patches are further decomposed into four sub-bands by using DCT. Dense Scale Invariant Feature Transform (DSIFT) method is use to...

Multi-patch systems, in which several species interact in patches connected by dispersal, offer a general framework for the description and analysis of spatial ecological systems. This paper describes how to analyse the local stability of spatially homogeneous solutions in such systems. The spatial arrangement of the patches and their coupling is described by a matrix. For a local stability ana...

landscape metrics quantifies structural features of the landscape. one of the advantages of these metrics is a possibility to use them in fast cumulative assessment of the development activities in the environment. in this paper, the cumulative effects of road network expansion on the tree cover of gorgan, kordkuy, aliabad townships in golestan province were investigated. to prepare the require...

Recently, projectors are one of the most common display device for using presentation at office and class, entertainment at home, and theater. The use of mobile projector expanded the applications such as meeting at field and presentation on the spot. The images are not always projected on white screen, causing color distortion. Various algorithms have been proposed to correct the projected col...

Cellular compartmentation was studied in the germinal matrices (the primary neuroepithelium and the subventricular zone) of the rat cerebral cortex at successive stages of embryonic development. Three sets of materials were used: methacrylate-embedded brain sections from normal embryos, autoradiograms from embryos labeled with [3H]thymidine, and methacrylate-embedded sections from embryos expos...

Type II DNA topoisomerases (topo II) play critical roles in some cellular events through repeated cleavage/rejoining of nuclear DNA. The β isoform (topo IIβ) is essential for the transcriptional induction of neuronal genes in terminal differentiation. Genomic sites targeted by the enzyme are nonrandom. Although previous studies have claimed that topo II cleavage sites are close to the nuclear s...