1. Production of Collagen Nanofibers and Unfolding of the Structure

   Selçuk Kaan HACIOSMANOĞLU1, Jochen BUERCK2 and Murat KAZANCİ3*

   1. Nanoscience and Nanoengineering Program, Faculty of Engineering and Natural Sciences, Istanbul Medeniyet University, 34700 Istanbul, Turkey.
   2. Karlsruhe Institute of Technology (KIT), Institute of Biological Interfaces (IBG-2), P.O. Box 3640, 76021Karlsruhe, Germany.
   3. Biomedical Engineering Department, Faculty of Engineering and Natural Sciences, Istanbul Medeniyet University, 34700 Istanbul, Turkey.
   

   Abstract: In this paper, we discuss two different collagen nanofiber production methods, namely, electrospinning and self-assembly of collagen fibers. The robustness and advantages of the methods are discussed. Scanning Electron Microscopy (SEM), Circular Dichroism (CD), Differential Scanning Calorimetry (DSC) methods are applied to compare the collagen fibrillary structures that are obtained by these techniques. The possible effects of applied methods and processes on the native structure are discussed and the future direction of the research is presented.

   Keywords: Collagen, Nanofibers, Electrospinning, Self-Assembly

   Pages: 41 – 47 | Full PDF Paper

2. Swimming Pool Water Treatment by Electrocoagulation Technicque with Aluminum-Graphite Electrode

   Suyanta^1*, Sunarto¹, Siti Marwati¹, Fifian Arizona P.¹,   Illyas Md Isa²

   1. Department of Chemistry Education, Faculty of Mathematics and Natural Science, Yogyakarta State University, Indonesia.
   2. Nanotechnology Research Centre, Faculty of Science and Mathematics, Universiti Pendidikan Sultan  Idris, 35900 Tanjong Malim, Perak, Malaysia.

   Abstract: This research aims to improve the quality of swimming pool water at Faculty of Sport Science, Yogyakarta State University by electrocoagulation process with aluminum-graphite electrode. An effectiveness of the electrocoagulation was based on process time, electrical voltage, separation efficiency of metals ion, TDS, and pH values. The samples and electrodes were characterized by using scanning electrone microscope (SEM) and X-ray diffraction (XRD).  The results showed that the optimum condition of potential and time of electrocoagulation were 10 volts and 24 hours respectively. Aluminum electrode that used as anode had some impurities. The quality of the swimming pool water based on the pH and TDS parameter after electrocoagulation process according to the regulation of Indonesian Ministry of Health No. 416 / Menkes / Per / IX / 1990 is as well as water quality standard of swimming pool which has the pH 6.7 and TDS 231.3.

   Keywords: Swimming pool water, electrocoagulation, aluminum-graphite electrode.

   Pages: 48 – 56 | Full PDF Paper