ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
With growing demand for high-speed access to mobile handheld devices, there is a significant cost... more With growing demand for high-speed access to mobile handheld devices, there is a significant cost benefit in deploying fixed wireless-mesh networks for backhaul access. However, enabling reliable broadband access over high-frequency radios (such as millimeter-wave networks) posses a fundamental challenge due to weather disruptions in general and rain attenuation in particular. In this paper, we present an analysis of the impact of precipitation on millimeter-wave mesh networks based on radar measurements of real storms in the Midwest US. Furthermore, we compare two novel algorithms that use physical-layer information to optimize routing at the network layer: P-WARP (Predictive Weather-Assisted Routing Protocol) and XL-OSPF (Cross-Layered Open Shortest Path First). Finally, we present simulation studies to compare the performance of the proposed protocols and evaluate the dependability of the end-user service during weather disruptions.
Hexane, chloroform, acetone, ethyl acetate and methanol leaf extracts of Atlantia racemosa were t... more Hexane, chloroform, acetone, ethyl acetate and methanol leaf extracts of Atlantia racemosa were tested against two bacterial species such as Staphylococcus aureus and Klebsiella pneumoniae. Among all the extracts, methanolic extract of the leaves (LME) was found to exhibit significant antibacterial effect with Minimum Inhibitory Concentration (MIC) of 250µg/ml (zone diameter 17mm). This antibacterial activity of LME of A. racemosa was determined using well diffusion assay, broth dilution assay and dye assays such as, MTT, Neutral red and Kenacid blue. Also, the mode of action of LME was studied and found to be inhibition of intracellular bacterial proteins. Furthermore, chromatographic analysis of the crude extract revealed the presence of 7 distinct bioactive compounds. The results of our study suggest that the leaves of A.racemosa could be a potent source of natural drugs against these pathogenic bacteria and hence could lead to the development of effective drugs for the treatment of health effects caused by these test pathogens.
Archives of Environmental Contamination and Toxicology, 2012
A test battery, composed of a range of biological assays, was applied to evaluate the ecological ... more A test battery, composed of a range of biological assays, was applied to evaluate the ecological health of soil aged for 69 days and spiked with a range of pyrene levels (1.04, 8.99, 41.5, 72.6, 136, and 399 μg g(-1) dry soil; Soxhlet-extracted concentrations after 69 days of aging). Chinese cabbage (Brassica rapa), earthworm (Eisenia fetida), and bacteria (Vibrio fischeri) were used as test organisms to represent different trophic levels. Among the acute ecotoxicity bioassays used, the V. fischeri luminescence inhibition assay was the most sensitive indicator of pyrene toxicity. We observed…
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
With growing demand for high-speed access to mobile handheld devices, there is a significant cost... more With growing demand for high-speed access to mobile handheld devices, there is a significant cost benefit in deploying fixed wireless-mesh networks for backhaul access. However, enabling reliable broadband access over high-frequency radios (such as millimeter-wave networks) posses a fundamental challenge due to weather disruptions in general and rain attenuation in particular. In this paper, we present an analysis of the impact of precipitation on millimeter-wave mesh networks based on radar measurements of real storms in the Midwest US. Furthermore, we compare two novel algorithms that use physical-layer information to optimize routing at the network layer: P-WARP (Predictive Weather-Assisted Routing Protocol) and XL-OSPF (Cross-Layered Open Shortest Path First). Finally, we present simulation studies to compare the performance of the proposed protocols and evaluate the dependability of the end-user service during weather disruptions.
Hexane, chloroform, acetone, ethyl acetate and methanol leaf extracts of Atlantia racemosa were t... more Hexane, chloroform, acetone, ethyl acetate and methanol leaf extracts of Atlantia racemosa were tested against two bacterial species such as Staphylococcus aureus and Klebsiella pneumoniae. Among all the extracts, methanolic extract of the leaves (LME) was found to exhibit significant antibacterial effect with Minimum Inhibitory Concentration (MIC) of 250µg/ml (zone diameter 17mm). This antibacterial activity of LME of A. racemosa was determined using well diffusion assay, broth dilution assay and dye assays such as, MTT, Neutral red and Kenacid blue. Also, the mode of action of LME was studied and found to be inhibition of intracellular bacterial proteins. Furthermore, chromatographic analysis of the crude extract revealed the presence of 7 distinct bioactive compounds. The results of our study suggest that the leaves of A.racemosa could be a potent source of natural drugs against these pathogenic bacteria and hence could lead to the development of effective drugs for the treatment of health effects caused by these test pathogens.
Archives of Environmental Contamination and Toxicology, 2012
A test battery, composed of a range of biological assays, was applied to evaluate the ecological ... more A test battery, composed of a range of biological assays, was applied to evaluate the ecological health of soil aged for 69 days and spiked with a range of pyrene levels (1.04, 8.99, 41.5, 72.6, 136, and 399 μg g(-1) dry soil; Soxhlet-extracted concentrations after 69 days of aging). Chinese cabbage (Brassica rapa), earthworm (Eisenia fetida), and bacteria (Vibrio fischeri) were used as test organisms to represent different trophic levels. Among the acute ecotoxicity bioassays used, the V. fischeri luminescence inhibition assay was the most sensitive indicator of pyrene toxicity. We observed…
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