Search results

In the catalyst bed scale, micro- or mini-structured catalyst designs can be used to potentially eliminate all mass transfer resistance and realize intrinsic catalytic performance [4].
Szczygiel constructed a mathematical model for optimizing the porous structure of the reforming catalysts [10, 11, 12].
The bidisperse structure must be optimized with the aim to maximize yield.
Szczygiel: Computers and Chemistry Vol. 24 (2000), p. 203
Szczygiel: Computers and Chemistry Vol. 23 (2) (1999), p. 121

SEM does not allow us to precisely identify neither the crystallographic nature nor the chemistry of the observed particles.
To identify the structure of the observed particles Electron Diffraction (ED) patterns were recorded from several precipitates.
However, in many cases ED patterns did not show superlattice reflections, and were then consistent with the stoechiometric vanadium monocarbide VC structure (fcc NaCl type, a = 0.417 nm).
ED work shows that all precipitates were at least consistent with the known fcc structure of stoechiometric vanadium monocarbide, most of them being positively identified as the long-range ordered V6C5 phase.
This equation assumes that all carbides have the fcc stoechiometric structure of VC; however, if all the observed particles were V6C5 carbides, this would lead to an absolute error less than 0.02 %.

Comparative Adsorption Isotherm for Beryllium Oxide/ Iron (III) Oxide toward CO2 Adsorption and Desorption Studies Azizul Hakim LAHURI1,a*, Mohd Ambar YARMO2,b, Maratun Najiha ABU TAHARI2,c, Tengku Sharifah MARLIZA1,d, Tengku Shafazila TENGKU SAHARUDDIN3,e, Mark Lee WUN FUI1,f and Norliza DZAKARIA4,f 1Department of Basic Science and Engineering, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia Bintulu Campus, P.O Box 396, Nyabau Road, 97008 Bintulu, Sarawak, Malaysia 2Catalysis Research Group, School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia 3Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia 4School 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
It was attributed by the deposition of BeO on Fe2O3 surfaces created its pore structure, besides pores on Fe2O3 surfaces.
Based on the area of hysteresis in Fig. 2, BeO/Fe2O3-400 has a larger area which supporting high mesoporous structure was generated (8.89 m2/g).
The BeO exhibits highest total pore volume of 0.0720 cm3/g but possesses mesoporous surface area only 2.91 m2/g was ascribed from highly macroporous structure instead of mesoporous structure.
Burghaus, Surface chemistry of CO2 – Adsorption of carbon dioxide on clean surfaces at ultrahigh vacuum, Prog.

Two-Way Shape Memory Behavior of Electrospun Non-Woven Mats Prepared from Sol-Gel Crosslinked Poly(ε-Caprolactone) Stefano Pandini1, a *, Silvia Agnelli1, b, Andrea Merlettini2, c, Chiara Gualandi2, d, Maria Letizia Focarete2, e, Katia Paderni3, f, Massimo Messori3, g and Maurizio Toselli4, h 1Department of Mechanical and Industrial Engineering and INSTM UdR of Brescia, University of Brescia, via Branze 38, 25133 Brescia, Italy 2Department of Chemistry ‘‘G.
Such innovative systems may provide various benefits for functional applications, since being capable of high compliance and fast transformation [2], featuring a micro- or nanometrically controlled surface and a porous structure [1,3], and possibly leading to anisotropic response in shape memory composites [4].
Further, the interesting performances that electrospuns show in biomedical field and tissue engineering, can be enhanced by providing them with shape memory capabilities, allowing the realization of thermally actuated minimally invasive scaffolds [5], that may also exploit the structure achieved by fiber orientation to orient cell growth [6].
Swelling measurements were carried out according to [9], and show moderately high values of gel content, G = 81.4%, which confirms the achievement of a crosslinked structure through the post-crosslinking treatment.
Leng, Shape memory polymer nanofibers and their composites: electrospinning, structure, performance, and applications.

The IR spectra were used to confirm the changes in the TPS structure.
Chemistry of Adhesives which Harden without Chemical reaction.
The royal Society of Chemistry, Thomas Graham House.
[6] Davies, G., & Henrissat, B. 1995 Structures and mechanisms of glycosyl hydrolyses.
Structure, 3, 853-859

Power University, Hydrology and Water Resources Engineering, enrolled in the first session of undergraduate students in 2007, According to the professional norms formulated by the Ministry of Education Steering Committee of Water Conservancy teaching discipline, Sub-Committee on Hydrology and Water Resources Engineering, Combined with our school’s professional Positioning of Hydrology and Water Resources Engineering, and meanwhile learning from the Hydrology and Water Resources Engineering Personnel Training Pattern both inside and outside our country, after six years’ subject development and experience learned from teaching practice, the personnel training program has experienced the 2006 edition, the 2008 edition and the 2013 edition which was just revised, and Initially established the basic theory of Hydrology and Water Resources Engineering undergraduate training mode, which focus on training of basic theory, basic knowledge and basic skills, for the purpose of constructing the three structures
Basic Course of Hydrology and Water Resources Engineering contains Engineering mechanics, engineering drawing, engineering surveying, physical geography, meteorology and climatology, water quality monitoring, water, environmental chemistry, hydrology tests, hydraulics, groundwater hydrology, hydraulic calculation, the water principle literature, theory and optimization of water resources method, water economy, geographic information systems and remote sensing applications.
Experimental Teaching Experimental Teaching of Hydrology and Water Resources Engineering contains nine courses of both basic courses and professional courses: Physics, meteorology and climatology, engineering mechanics, engineering surveying, hydrographic hydraulic calculation, hydraulics, water resources development and utilization, water quality monitoring, water, environmental chemistry, totally 126 hours.
Guarantee Systems Qualified Teachers’ Indemnification North China electric power university undergraduate public basic courses are completed by the Office of Academic Affairs unified coordination instruction including the basis of much experience of teaching mathematics and physics, department of foreign languages school of law refer art sports departments complete; Professional basic course according to the professional under centralized by professional department (teaching and research section); Major professional elective courses shall be borne by the teaching and research section professional class teacher At present, the hydrology and water resources engineering teaching and research section, has full-time on-the-job teachers nine people, including professors (doctoral advisor) 2 4 associate professors, 2 lecturers 1 full-time laboratory technician, has a doctorate in eight master's degree in 1, under 40 teachers have 5 people, teaching team degree structure, age structure and professional
title structure is reasonable, all graduated from water conservancy class institutions of higher learning.

In this study, in allusion to effects of adhesive on the storage stability of silicon delay composition, by adding different kinds of adhesive in silicon delay composition, influence rule of the storage temperature and humidity on burning rate and delay precision is studied. 2 Experiments 2.1 Materials The red lead (Pb3O4) with an average particle size of 4.232μm and purity of 98% was purchased from Aladdin Chemistry Co.
From the recording instrument the interval time(t) is considering as the delay time of the delay element Fig.1 Test sample and structure 1-digital storage data recorder, 2-exploders, 3,4-photoelectric sensor, 5,8,11-fixed device, 6-aluminium tube, 7-delay composition column, 9-plastic plug, 10-clamp, 12-ignition nonel 2.3.4 Calculations of the burning rate and delay precision of the delay composition Burning rate of the delay composition is calculated by equation of , where (cm) and (s), are the column length and the delay time of NO.i respectively.
On conditions of storage time, the membrane formed by the binders changes from compact structure in low temperature to relaxed structure after high temperature and humidity storage process.
The subtle change allows molecular to diffuse among the reaction phase, and the reaction product forms to fill this relaxed structure, which forces the burning rate changing in a small range.
Shao: Journal of Physics and Chemistry of Solids.Vol. 71(2010),p. 145-148

We found metastable states, by 0.4, 0.4 and 0.5 eV, for structures where H is antibonding to the phosphorus atom for GaP, InP and ZnTe, respectively.
We will give special emphasis to their vibrational structure.
Structures where H is antibonding in the phosphorus side were found to be metastable by 0.4, 0.4 and 0.5 eV for GaP, InP and ZnTe, respectively.
The calculated quasi-harmonic stretching frequencies of the Zn-H-P unit for the BC structures agree, within 2%, with the fundamental transitions, Table 2.
[14] Information on http://webbook.nist.gov/chemistry.

Consequently, SC-CO2 based chemistries can rapidly penetrate a porous film like a gas with the reactant concentration similar to a liquid. 1000 1500 2000 2500 3000 3500 4000 4500 5000 30 40 50 60 70 80 Temperature (C) Pressure (psi) ρ =0.3 ρ =0.4 ρ =0.5 ρ =0.6 ρ =0.7 ρ =0.8 Figure 1 Supercritical CO2 densities as functions of temperature and pressure.
For some of the smallest pitch test structures reported here, the normalized comb-serpent (CS) line-to-line capacitance for SC-HMDS samples decreased by 18% relative to those samples having received the wet-clean.
Line-to-line (comb) test structures indicate that the dielectric breakdown field of a CVD-deposited porous low-k can be significantly impacted (positively) relative to non SC-CO2 integrations schemes by implementing an SC-CO2 extraction process (Error!
It is believed that SC-CO2 penetrates the porous structure and removes deposition byproducts and low molecular weight short-chain species.
TMAH/bicarbonate systems have been demonstrated as effective means of both resist and post-ash residue removal; however, this is a reaction-limited process, and occurs only at temperatures above 50C.[22] In addition, fluoride chemistries [16] have been shown to etch thermal oxides, and β-diketones can remove copper residues.

Using a one-dimensional time dependent two-temperature model with complete chemistry, Barra and Ellzey [2] recently investigated the heat recirculation in a porous burner.
The model utilizes a volume-averaged approach and does not assume thermal equilibrium between the gas and the solid, because combustion in porous media is a complex process, in which temperature differences, resulting from the effects of solid and gas conduction, solid-to-solid radiation, convective hear transfer between the solid and the gas, species diffusion and full chemistry, should be taken into consideration in the model equations. 2.1.
The structure properties of ceramic foams used in our numerical simulation are displayed in Table 1.
The purpose of this skeletal mechanism is to provide a good description of methane oxidation including nitrogen chemistry at high temperature (T>1500K) but not excessively fuel-rich conditions [9].
Analytical study of the structure of radiation controlled flame.