Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=20234#.VNCDsizQrzE Author(s)   Esher Hsu , Chen-Ming Kuo Affiliation(s) Department. of Statistics, National Taipei Univ., Taipei 104, Taiwan . Department. of Mechanical Eng., I-Shou Univ., Kaohsiung 84008, Taiwan . ABSTRACT Household solid waste recycling has been a major policy of the Taiwan Environmental Protection Administration. Production values and employment opportunities from recycling are not only a major focus of Taiwan’s Congress, but also the major goal of recycling policies for the EPA. In this study, production values and employment opportunities induced by household solid waste recycling were estimated from a sampling survey. The estimated production values in 1998 were NT$26.9 (USD$0.27) billion from collection/sorting business and NT$44.6 (USD$1.27) billion from the recycling industry. Total estimated added value was approximately NT$...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=20215#.VNCBPizQrzE Author(s)   Kyei-Sing Kwong , James P. Bennett Affiliation(s) Albany Research Center, USDOE 1450 Queen Ave. SW.Albany, OR 97321 USA. . Albany Research Center, USDOE 1450 Queen Ave. SW.Albany, OR 97321 USA. . ABSTRACT The recycling options of spent MgO-C refractories from an electrical arc furnace (EAF) have been evaluated. The economic, quality of spent refractories and products made from it, the ease of implementation of a recycling practice and the interest of steel melt shops were considered. It was decided that the best option of most EAF shops would be to recycle spent MgO-C refractory as a foaming slag conditioner because of their MgO content. Crushed MgO-C spent refractories can be reused directly back into an EAF without complex and costly beneficiation. Even though this practice is simple, it is critical to know the optimum ...

Read  full  paper   at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53362#.VMBgxyzQrzE Author(s)    Lorena Eugenia Sánchez Cadena 1 , Zeferino Gamiño Arroyo 2 , Mario Alberto González Lara 2 , Q. Demetrio Quiroz 1 Affiliation(s) 1 Departamento de Ingeniería Civil, Universidad de Guanajuato, DI, Av. Juárez 77, CP 36000, Guanajuato, Gto., México . 2 Departamento de Ingeniería Química, Universidad de Guanajuato, DCNyE, Noria Alta s/n, CP 36050, Guanajuato, Gto., México . ABSTRACT Mobile phones represent a significant and growing problem with respect to electrical waste and electronic equipment (WEEE). Nevertheless, they are perhaps one of the most valuable electronic products, since they are an important resource for the recovery of metals in terms of mass and volume. In this research a chemical recycling of mobile phones by solvolysis was investigated. The processing was performed by comminution in a hammer mill followed by scr...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52498#.VJog_cCAM4 Author(s)   Nobuaki Yamaguchi 1 , Yoshiko Masuda 2 , Yoshishige Yamada 2 , Hideaki Narusawa 1 , Cho Han-Cheol 1 , Yukimichi Tamaki 3* , Takashi Miyazaki 1 Affiliation(s) 1 Department of Conservative Dentistry, Division of Biomaterials & Engineering, Showa University School of Dentistry, Tokyo, Japan . 2 Department of Conservative Dentistry, Division of Endodontology, Showa University School of Dentistry, Tokyo, Japan . 3 Department of Dental Materials Science, Asahi University School of Dentistry, Gifu, Japan . ABSTRACT Mineral trioxide aggregate (MTA) cement is an attractive material in endodontic den...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=51333#.VGRyvmfHRK0 Author(s) Tushar J. Trivedi 1 , Arvind Kumar 1,2* Affiliation(s) 1 AcSIR, CSIR—Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, India . 2 Salt and Marine Chemicals Division, CSIR—Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, India . ABSTRACT We explored the possibility of using ionic liquids (ILs) as medium for efficient extraction of agarose via dissolution of red algae under varying conditions of heating or microwave irradiation. As compared to conventional methods, a very high extraction yield of good quality agarose (as high as 39 wt%) could be achie...