Study of PM10 Analysed by SEM-EDS

The particulate air pollution is a growing problem in cities with emissions generating activities. Size and chemical composition of ambient particulates strongly influence on human health, visibility and ecosystem etc.

This study looked into the origin of the particles in the atmosphere, and divided particles into groups based on morphology and elemental composition. These particles morphology and chemical composition, illustrate an abundance of natural elements within the zone. It is suggested, though, some of the elements presented are directly related with human activities, and are of much interest from the public health and environmental perspectives.

Article by researchers from Sonora State University, Mexico.

Image by Kevin Dooley, from flickr-cc.

此博客中的热门博文

Electron Spin and Proton Spin in the Hydrogen and Hydrogen-Like Atomic Systems

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52202#.VIj7tMnQrzE Author(s) Stanisław Olszewski * Affiliation(s) Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland . ABSTRACT The mechanical angular momentum and magnetic moment of the electron and proton spin have been calculated semiclassically with the aid of the uncertainty principle for energy and time. The spin effects of both kinds of the elementary particles can be expressed in terms of similar formulae. The quantization of the spin motion has been done on the basis of the old quantum theory. It gives a quantum number n = 1/2 as the index of the spin state acceptable for both the electron and proton

阅读全文

Remarks on the Complexity of Signed k-Domination on Graphs

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53574#.VMnXsCzQrzE Author(s) Chuan-Min Lee 1 , Cheng-Chien Lo 1 , Rui-Xin Ye 2 , Xun Xu 2 , Xiao-Han Shi 2 , Jia-Ying Li 2 Affiliation(s) 1 Department of Computer and Communication Engineering, Ming Chuan University, The First American University in Asia, Taoyuan, Taiwan, Chinese Taipei . 2 Department of Electronic Information Engineering, Fuzhou University, Fuzhou, China . ABSTRACT This paper is motivated by the concept of the signed k-domination problem and dedicated to the complexity of the problem on graphs. For any fixed nonnegative integer k, we show that the signed k-domination problem is NP-complete for doubly chordal graphs. For strongly chordal graphs and distance-hereditary graphs, we show that the signed k-domination problem can be solved in polynomial time. We also show that the problem is linear-time solvable for trees, interval graphs, and chordal comparability graphs

阅读全文

Dietary Fiber Content of Waterleaf (Talinum triangulare (Jacq.) Willd) Cultivated with Organic and Conventional Fertilization in Different SeasonsDietary Fiber Content of Waterleaf (Talinum triangulare (Jacq.) Willd) Cultivated with Organic and Conventional Fertilization in Different Seasons

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53985#.VN21HizQrzE Author(s) Nuri Andarwulan 1,2 , Didah Nur Faridah 1,2 , Yolanda Sylvia Prabekti 1 , Harum Fadhilatunnur 1 , Leo Mualim 3 , Sandra Arifin Aziz 3 , Luis Cisneros-Zevallos 4 Affiliation(s) 1 Department of Food Science and Technology, Bogor Agricultural University, Bogor, Indonesia . 2 Southeast Asian Food and Agricultural Science and Technology (SEAFAST) Center, Bogor Agricultural University, Bogor, Indonesia . 3 Department of Agronomy and Horticulture, Bogor Agricultural University, Bogor, Indonesia . 4 Department of Horticultural Sciences, Texas A&M University, College Station, USA . ABSTRACT Waterleaf ( Talinum triangulare (Jacq.) Willd has long been eaten in Indonesia as vegetable and the main parts consumed are leaves and young shoots. Waterleaf is sticky presumably due to its pectin content which is associated to dietary fiber. The dietary fiber which

阅读全文

Scientific Research Publishing

搜索此博客