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August 2016

Volume 2 Issue 2

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Research Article
Modeling Volcanic Ash Resuspension with Dustran

Brad G Fritz*

Resuspension of volcanic ash can be problematic for a number of reasons. Ash resuspension can reduce visibility, increase concentrations of atmospheric particulate matter (respiratory irritant), damage machinery and clog air intake systems. While these issues are the same problems created by ash emitted during the initial eruption, resuspension can persist for months, resulting in prolonged problems. For example, this study was initiated due to concerns over a future eruption and subsequent ash resuspension impacting operability of facilities in the Columbia Basin (in and around Richland, Washington).

 

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Research Article
Catalytic Non-Thermal Plasma Reactor for the Decomposition of p-Xylene Over MnOx and CoOx Supported on Anodized Aluminum Oxide

M.S.P. Sudhakaran, J. Karuppiah, E. Linga Reddy, M. Sanjeeva Gandhi, Quang Hung Trinh, Young Sun Mok*

This work involved an investigation of the oxidation of p-xylene in a catalytic nonthermal plasma (NTP) reactor using anodized aluminum oxide (AAO) coated with manganese and cobalt (Mn and Co) oxides. The formation of the Mn and Co oxides on the AAO was confirmed by using X-ray diffraction (XRD) and X-ray photoelectron microscopy (XPS), and the surface morphology was analyzed using field emission–scanning electron microscopy (FE-SEM).

 

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Research Article

Sequence-Based Typing for Legionella Pneumophila Isolated from Water Systems of Residential Facilities in Kuwait

Qadreyah Al-Matawah*, Sameer Al-Zenki, Søren Uldum

A total number of 30 strains of Legionella pneumophila (sg1 = 6; sg3 = 20; sg4 = 1 sg7 = 1; sg10 = 2) were genotyped by the SBT method according to the European Society of Clinical Microbiology and Infectious Diseases (ESCMID) Study Group for Legionella Infections (ESGLI formerly EWGLI). A high proportion of isolates did not give a full 7 loci SBT profile due to amplification fail of the flaA loci, the flaA sequence of representative isolates were however revealed by whole genome sequencing. The Legionella pneumophila isolates were grouped into seven distinct Sequence Types, including one (ST1719) which were new to the SBT database of ESGLI and two (ST1223 and ST1718) which were recently also isolated from cooling towers in Kuwait but not have been reported from other countries. 

                                        

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Research Article

Development and Application of a New LC/MS/MS Method for Analysis of Phthalic Acids in Environmental Water and Sediment

Akio Yasuhara, Yuuka Tanaka, Takayuki Shibamoto*

Phthalic acids have been known to form from various plastics, which contain alkyl phthalic esters as a plasticizer, after they were disposed into the environment. The limit of detection (LOD) in a newly developed LC/MS/MS method for phthalic acids analysis was 48 ng/L for phthalic acid, 22 ng/L for terephthalic acid and 16 ng/L for isophthalic acid in water samples. The limit of quantitation (LOQ) was 140 μg/kg for phthalic acid, 66 μg/kg for terephtalic acid and 48 μg/kg for isophthalic acid in water samples. These values are comparable to those of conventional gas chromatographic methods.

                                        

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