Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53697#.VM85jyzQrzE Author(s)    I. Medvedeva 1,2* , Iu. Bakhteeva 1 , S. Zhakov 1 , A. Revvo 2 , M. Uimin 1 , A. Yermakov 1 , I. Byzov 1 , A. Mysik 1 , N. Shchegoleva 1   Affiliation(s) 1 Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia . 2 Ural State Mining University, Ekaterinburg, Russia . ABSTRACT Sedimentation dynamics of magnetite ( γ -Fe 3 O 4 ) nanopowders (10 - 20 nm) in water in the presence of a gradient magnetic field was studied by optical and Nuclear Magnetic Resonance (NMR) relaxometry methods. The magnetic field B ≤ 0.3 T, dB/dz ≤ 0.13 T/cm was produced by the system of permanent strip magnets. The initial sedimentation rate of the nanoparticles in water and under magnetic fields is higher for less concentrated suspensions (c 0 = 0.1 g/l) than for more concentrated ones (c 0 = 1 g/l)....

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53411#.VMG4XyzQrzE Author(s)     Hadi Sumanta 1,2* , Tri Wibawa 3 , Suwarno Hadisusanto 4 , Anik Nuryati 5 , Hari Kusnanto 6   Affiliation(s) 1 Center for Environmental Health Engineering, and Disease Control, Yogyakarta, Indonesia . 2 Student of Doctoral Program, Faculty of Medicine, Gadjah Mada University, Yogyakarta, Indonesia . 3 Department of Microbiology, Faculty of Medicine, Gadjah Mada University, Yogyakarta, Indonesia . 4 Department of Biology, Faculty of Biology, Gadjah Mada University, Yogyakarta, Indonesia . 5 Department of Health Analyst, Yogyakarta Health Polytechnic, Yogyakarta, Indonesia . 6 Department of Public Health, Faculty of Medicine, Gadjah Mada University, Yogyakarta, Indonesia . ABSTRACT Leptospirosis is a potential threat to public health. An increasing number of people infected with Leptospira were reported in Bantul Distr...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53125#.VLXQ2cnQrzE Author(s)    Mark Bediako 1 , J. T. Kevern 2 , Eric Opoku Amankwah 3   Affiliation(s) 1 Council for Scientific and Industrial Research, Building and Road Research Institute, Materials Engineering Development Division, Kumasi, Ghana . 2 Department of Civil and Mechanical Engineering, University of Missouri, Kansas City, Missouri, USA . 3 Development Office, University of Education-Winneba, Kumasi Campus, Kumasi, Ghana . ABSTRACT Curing of cement based products such as concrete and mortar, is very important to achieve good strength and durable products. However the curing environment plays a pivotal role in the overall quality of cement based products in terms of strength development. ASTM C192 allows moist curing either in a fog room or under water. However, these must meet ASTM C511 which controls temperature, and specifically fo...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53066#.VLST0snQrzE Author(s)   Kunio Ueda *   Affiliation(s) School of Environmental Science, The University of Shiga Prefecture, Hikone City, Japan . ABSTRACT The defoliation of Cryptomeria japonica is observed in shrine forests around Hikone, Japan. Here, moisture content, soil pH, exchangeable Mg, Ca and Al of soil in shrine forests of C. japonica were examined in order to assess the relationship between these factors and defoliation. There was no relationship between soil pH, exchangeable Mg and Ca in soil and the degree of defoliation in shrine forests. Exchangeable Al in the soil of shrine forests increased with decreasing soil pH below pH 5.0, but there was no relationship between exchangeable Al and degree of defoliation in shrine forests. Soil moisture content differed between severely defoliated forests and forests with no defoliation. Soil...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=48947#.VJjZRcCAM4 Author(s) Nour-Eddine Es-Safi   Affiliation(s) Mohammed V Agdal University, Rabat, Morocco . ABSTRACT Water is one of the most important substances on earth. Safe drinking water is essential to humans and other life forms. All plants and animals must have water to survive. If there was no water , there would be no life on earth. Apart from drinking it to survive, people have many other uses for water. This natural resource is becoming scarcer and its demand exceeds supply in some region rendering its availability a major social and economic concern. Apart of this scarcity is water pollution which is increasing ...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52386#.VJOMFcCAM4 Author(s)   Jeremiah Mutamba , Ola Busari Affiliation(s) Trans-Caledon Tunnel Authority, Centurion, South Africa . ABSTRACT In demonstrating the prime place of infrastructure investment in its national long-term development framework encapsulated in Vision 2030, as well as in the related New Growth Path, South Africa recently put together a comprehensive National Infrastructure Plan. Aside from mapping out short and medium-term priorities for scaling up investment in strategic sectors and enhancing infrastructure links across the country, the initiative underscores development objectives such as community empowe...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52281#.VI-Mv8nQrzF Author(s)   E. R. Atta * , Kh. M. Zakaria Affiliation(s) Egyptian Nuclear and Radiological Regulatory Authority, Cairo, Egypt . ABSTRACT The present work is carried out to obtain quantitative information of some natural radioactive materials and heavy metals in water and sediment samples along the Alexandria Coastline, as a step to construct the baseline map of the background radioactivity level in the Egyptian environment and also as a base data to assess the future physicochemical changes of surface coastal water and sediment in the studied area. The distribution of natural gamma emitting radionuclides such as ...