Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: September 2008
Authors: Sun Yoon, Arun Anand Prabu, Kap Jin Kim, S. Ramasundaram
Ramasundaram1,c and Kap Jin Kim1,d,* 1 Department of Advanced Polymer & Fiber Materials, College of Environment & Applied Chemistry, Kyung Hee University, Yongin-si, Gyeonggi-do 446-701, South Korea a wow547@khu.ac.kr, banandprabu@khu.ac.kr, cramasundaram@khu.ac.kr, d kjkim@khu.ac.kr Keywords: PVDF, metal salts, MWCNTs, electro-spinning, nanoweb, touch-sensors.
Many researchers have studied the PVDF electrospun nanoweb fibers for varying applications and a limited number of papers have reported the crystalline structures [6], macromolecular orientation [7], and the effect of additives [8,9] in PVDF electrospun nanofibers.
FTIR-transmission spectroscopy (FTIR-TS) technique is effectively used to characterize the crystal structures of the PVDF because different crystalline phases show varying characteristic absorptions at 486, 532, 613, 763, 796, 976 cm -1 for the α-phase, 471, 509, 1275 cm -1 for the β-phase and 1233 cm -1 for the γ-phase.
Online since: October 2010
Authors: Vincent Salles, Philippe Miele, Samuel Bernard, Sylvie Foucaud
The chemical structure of the borazine was determined by FT-IR spectroscopy using a Bruker IF66 spectrometer in KBr pellets. 1H and 13C spectra were obtained using a Bruker AM 300 spectrometer in C6D6 operating at 300MHz and 62.5MHz, respectively, while the 11B solid NMRwas performed with a Brüker spectrometer (400 MHz/89 mm) in Motpellier II University.
It was prepared similarly to the procedure developed by Sneddon et al. starting from NaBH4 and (NH4)2S04.[8] Referring to its chemical formulae H3B3N3H3 and structure, borazine represents a source of both boron and nitrogen elements with the correct boron-to-nitrogen ratio and symmetry.
The chemistry involved during the borazine-to-boron nitride conversion is thought to include a complex sequence of structural and chemical changes based on molecular rearrangements and evolution of dihydrogen which gradually create nanostructural boron nitride as depicted in Fig. 1.
Online since: August 2015
Authors: Agripa Hamweendo, Ionel Botef, Terence Malama
The difficulties in the conducting of physical CS experiments of Ti are due to its high critical velocity, high reactivity with oxygen and crystal structure.
A Schematic diagram of the MD cell structure is given in Fig. 1.
Brooks, “CHARMM fluctuating charge force field for proteins: II protein/solvent properties from molecular dynamics simulations using a nonadditive electrostatic model.,” Journal of computational chemistry, vol. 25, no. 12, pp. 1504–14, Sep. 2004
Online since: May 2006
Authors: António Pereira Nascimento Filho, Lilian Marques Silva, Luiz Pereira, Joana Catarina Madaleno, Maria Lucia Pereira Silva, Alexsander T. Carvalho
Cavities were built in order to test the use of the thin films deposited on silicon or rough silicon substrates in a catalytic structure.
Table 2: Maximum temperatures and observed results for structures composed for square pieces of silicon, LTCC and glass Adherence of LTCC on Maximum Temperature (ºC) Silicon Glass Observations 650 No Yes -- 700 Yes Yes Chosen as maximum processing temperature 750 Yes Yes Stress occurred and glass was broken later 850 No Yes Near glass melting point * - profile: 12ºC/min up to 350ºC, 350º during 30 min, 10ºC/min up to the maximum temperature, 40 min at maximum temperature, cooling to room temperature in approximately 3 hours Catalysis tests were carried out using the cavities and Raman spectroscopy.
[2] http://www.sandia.gov/water/projects/preconcentrator.htm access in (2005) [3]B.H Lapizco-Encinas, B.A Simmons, E.B Cummings, Y Fintschenko, Analytical Chemistry Vol 76 (2004) p.1571
Online since: February 2014
Authors: Bo Zhang, Pei Yang Shi, Mao Fa Jiang, Cheng Jun Liu, Wen Hai Chi
Fig. 2 The E-pH diagrams of Cr-Fe-H2O system at different temperature As is known to all, chromite is stable and compact spinel structure, and is hardly soluble in sulfuric acid solution under atmospheric pressure.
Suitable oxidizing agent could not only increase the oxidation potential of the sulfuric acid solution, but also promote the oxidation of Fe2+ in the chromium spinel phase, thereby undermining the spinel structure.
Ferroalloy. (1984), p.27 [37] Guang-xian Xu: Extraction chemistry (Shanghai Science And Technology Press, Shanghai, 1984) [38] Anchang Liu, and Lihui Jia: J.
Online since: April 2006
Authors: Yukichi Umakoshi, Akio Kobayashi, Takayoshi Nakano, Yasuhiko Tabata, Mariko Kawai, Masaya Yamamoto, Kunio Takaoka, Toshio Yamamoto, Hiroyoshi Iwaki, Jee Wook Lee, Takuya Ishimoto
In general, OA which is closely related to the loss of bone structure under loading is progressed more significantly in the medial condyle of femur than that in the lateral condyle in Japanese patients [13].
Elliot: Structure and chemistry of the apatites and other calcium phosphates (Elsevier, Amsterdam 1994)
Online since: August 2013
Authors: Zhen Chen, Wen Hua Song, Miao Zhang, Qing Gong Li
FDS Simulation and Consequences Forecasting of LPG Storage Tank Pool Fire and Explosion Miao Zhang1, 2, a, Wenhua Song1, b, Qinggong Li 1, 3, c, Zhen Chen1, d 1Environment and Chemistry College, Tianjin Polytechnic University Tianjin, 300387, China 2Hebei District Fire Brigade Tianjin, 300100, China 3 Tianjin Fire-fighting General Corps Tianjin, 300100, China aemail: zhangmiao713@126.com bemail:songwenhuateam@sina.com cemail: newthing@vip.sina.com demail:chenzhen3419@126.com Keywords: liquefied petroleum gas; steam cloud explosion; pool fire; FDS Abstract: This paper analyzes the fire explosion risk of liquefied petroleum gas (LPG) storage tank through methods of model calculation and simulation.
The distribution of flame radiation intensity at different moments Table 1 Different Thermal Radiation Intensity and The Damage / Failure Criterion [5] Thermal Radiation Intensity (KW/m2) Damage Degrees to Equipments Personnel Injury 37.5 operating equipments all damaged 1% dead within 10 seconds, all dead within1 minute 25 the minimum radiation intensity to ignite the timber, and deform the steel structure equipment under the normal circumstance seriously injured in 10 seconds, all dead within 1minute 12.5 the minimum radiation intensity to melt the plastic under the normal circumstance suffered minor injuries in 10 seconds, 1% dead within 1 minute 4.0 glass broken after a long time radiation pain after radiation more than 20 seconds, but not injured 1.6 no harm no harm Accident Consequences Simulation of LPG Steam Cloud Explosion A.
The shockwave overpressure was destruction and damage situation on buildings and personnel [9] overpressure(105Mpa) destruction and damage situation 0.05~0.06 Door window glass of the broken part 0.06~0.10 The door window glass most crushing pressure 0.15~0.20 Window frame damage 0.20~0.30 Wall cracks, personnel minor injury 0.40~0.50 Wall fissure, tiles drop down, researchers medium injury 0.60~0.70 Wooden building workshop room and pillar broken, room frame loose, personnel serious injury or death 0.70~1.00 Brick wall collapsed, personnel serious injury or death 1.00~2.00 Shockproof reinforced concrete destruction, small houses collapsed and personnel most death 2.00~3.00 Large steel structure damage, most of the deaths 1) TNT equivalent weight of LPG vapor cloud explosion The equivalent weight of TNT was obtained using the following equation: (1) Where, 1.8 is ground explosion coefficient; is coefficient of weight about
Online since: September 2013
Authors: Jun Guo He, Jian Liu, Min Zhou, Jian Hao Zhou, Qi Chao Hu
Li and Logan’s study showed different flocculation conditions can be obtained by adjusting the water chemistry conditions [25].
Both simulation and experimental results showed that growth of flocs mainly experienced three stages: at first the growth of flocs dominated, particles coagulated into flocs with rapid growth of particle size, share of large particles in particle size distribution increased gradually; As coagulation proceeded, flocs formed a porous structure and became prone to break under the action of shear force; after a period of reaction, the particle size distribution tended to be stable, no significant change appeared, particle coagulation and flocs breakage eventually reached dynamic equilibrium.
Raper, Effect of shear schedule on particle size, density, and structure during flocculation in stirred tanks, Powder Technol., 97(1998)26-34
Online since: September 2020
Authors: Mohd Ambar Yarmo, Maratun Najiha Abu Tahari, Zaitun Ghazali, Norliza Dzakaria, Azizul Hakim Lahuri, Siti Sarahah Sulhadi, Salma Samidin
Application of Octadecylamine-Based Adsorbent on Carbon Dioxide Capture Maratun Najiha ABU TAHARI1,a *, Azizul Hakim LAHURI2,b, Zaitun GHAZALI1,c, Salma SAMIDIN1,d, Siti Sarahah SULHADI1,e, Norliza DZAKARIA1,3,f, Mohd Ambar YARMO1,g 1School of Chemical Science and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia. 2Department of Basic Science and Engineering, Faculty of Agriculture and Food Science, Universiti Putra Malaysia Bintulu Campus, P.O Box 396, Nyabau Road, 97008 Bintulu, Sarawak, Malaysia. 3School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, Cawangan Negeri Sembilan, Kampus Kuala Pilah, Pekan Parit Tinggi, 72000 Kuala Pilah, Negeri Sembilan, Malaysia.
This suggestion reaffirmed by Jaime et al. findings in which ODA loaded on mica SAMs form a highly packed and ordered molecular structure with the alkyl skeleton tilted with respect to the surface normal [16].
Moreover, Salam and Burk reported several uniform peaks in the ODA diffractogram were resulted from the crystalline structure of the pure ODA [17].
Online since: March 2016
Authors: Lei Miao, Jian Hua Zhou, Jia You Xu
SiO2 Cryogel Dispersion in Organic Solvent for the Application as Transparent Heat Insulation Coating on PET Jiayou Xu1, a, Jianhua Zhou2, b* and Lei Miao2, c 1School of Chemistry and Chemical Engineering, Guangzhou University, No.230 Waihuanxi Road, Guangzhou 510006, China 2Guangxi Key Laboratory of Information Material, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, No.1 Jinji Road, Guilin 541004, China.
Jelle, Solar radiation glazing factors for windows panes, glass structures and electrochromic windows in buildings-measurement and calculation, Sol.