Search results

The structure and composition of C-S-H has been the subject of many experimental and theoretical attempts over 120 years [2].
The smallest scale models are atomistic-molecular models describing the structure and stoichiometry of the C-S-H.
[3] Taylor H.F.W.: Cement Chemistry (Thomas Telford, London, 1997)
[9] Peter C.Hewlett: Lea’s Chemistry of Cement and Concrete (Elsevier Science & Technology Books, Butterworth-Heinemann, Boston, MA, USA, 2004) [10] Thomas J.J., Jennings H.M. and Allen A.J.: Cem Concr Res Vol.28(6)(1998), p.897

Research the Potential Risk-points of the Oilfield Operation Wastewater with High Salinity on the Environment Rong Huang1, a, Yang Zeng1, b*, Guoyong Du1, c, Jue Wang2, d 1School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China; 2Li Shui Operating Company, CNOOC (China) LTD, Shanghai 200030, China a261042293@qq.com, b,*zengyanglunwen@163.com, c910898715@qq.com, d398138169@qq.com Keywords: Petroleum industry wastewater, high salinity, risk point, clean production.
Secondly, the trap structure of the reinjected layer will be destroyed by geological movements.
To maintain the pressure-bearing ability of formations, select abandoned wells with stable geological structures as reinjecting wells.
Dong: Chemistry & Bioengineering, (2009) No.1, p.68

Novel efficient synthesis of glycol monoethers over highly active tungsten-containing mesoporous molecular sieve SBA-15 Yuan-xiang Yao1, Su-xing Tuo1, Jin-yun Liu1, Xin-liang Tan1, Zhi-guang Peng2,* , Jin-gang Yu2,* 1 Research and Development Center, China Tobacco Hunan Industrial Corporation, Changsha 410014, China 2 College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China E-mail: yuanxyao@sina.com * Corresponding author: *JG Yu, E-mail: yujg@csu.edu.cn; Tel/Fax: +86-731-88879616.
Very clear and perfect morphology, as well as the ordered hexagonal structure for the W-containing SBA-15 mesoporous molecular sieves, is being observed.
Characterization of the material by XRD, N2 adsorption/desorption, SEM and TEM indicated that the hybrid materials were highly crystallized with uniform mesoporous structure.
Arpe, Industrial Organic Chemistry Verlag Chemie, New York, 1978

To implement uniform thickness collection, it is needed to optimize the flow velocity distribution by improving the structure of suction inlet.
Sucktion inlet Simulated surface (a) Physical model (b) gridded model Fig.1 The dimensions of physical model and its gridded model Flow analysis and structure optimization Computational Fluid Dynamics (CFD) is a combination of modern fluid mechanics, numerical analysis and computer science.
Jónsson, in: Theoretical Methods in Condencsed Phase Chemistry, edited by S.D.
Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000)

Under arc discharge at high voltage on the anodic surface, a dense ceramic coating grows in situ on the surface of alloys by thermochemistry, plasma chemistry and electrochemistry reaction[1,2]. 30th of 20 Century, Germany scientist A.Gunterschulze and H.Betz[3] discovered spark discharge phenomenon in high voltage condition. 1969, Russia scientist G.A.Markov[4] first obtained ceramic coating on Al and Al alloy.
Up to now, most researches[5,6] have focused on the corrosion resistance properties of micro-arc oxidation coatings(MAOC) and it is applied in chemistry equipment, architecture, pipeline fields etc.
The loose outer layer is loose structure with higher rate pores, however the dense inner layer is more harder with higher sintered density and lower rate pores.
MAOC is structured with loose layer and dense layer[7], the hardness and wear-resistance properties of MAOC are decided by growth, thickening and characteristic of dense layer.

Result and Discussion Structure Interaction Studies of Composites.
Composite structure of formed rPP/DVB/PP-g-AA/PaF/comBen+ZB can be studied using FTIR spectra for its specific functional groups, see Fig. 1 Fig.1 FTIR spectra of rPP/DVB/PP-AA/PaF/comBen+ZB Based on the FTIR spectra as shown in Fig.1 above, each functional group of rPP/DVB/PP-g-AA/PaF/comBen+ZB composites can be analyzed.
Flammability, Biodegradability dan Mechanical Properties of Bio-Composites Waste Polypropilene/Kenaf Fiber Containing Nano CaCO3 with Diammonium Phosphate, Procedia Chemistry, vol.4, (2012) p.282-287 [3] H.G.B.
Nil, Synthesis of Zinc Borate: Effects of Different Modifying Agents and Isopropyl Alcohol on Yield and Hydrophobicity by Using Zinc Carbonate, International Conferrence on Chemistry and Chemical Process, Vol.10. (2011) 55-58

The first diffractogram shows that the sample structure is typically amorphous, i.e., there is no well-defined crystalline peak.
It was expected the presence of characteristic peaks of crystalline structure in the Fig. 1B due to metallic materials.
Long: Modern Polyesters: Chemistry and Technology of Polyesters and Copolyesters.
Moneim, Inducing Antibacterial Activity of Commercial PET Surgical Sutures via Silver Nanoparticles, International Conference on Chemistry, Biomedical and Environment Engineering (2014)

Modulation of the Structures and Properties of Bacterial Cellulose Film by Fermentation Carbon Sources Guang Yang1,2*§, Jianjian Xie1§ 1 College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, North Ren Min Road, No. 2999, Songjiang, Shanghai, 201620, China 2 Key Laboratory of Science & Technology of Eco-Textile (Donghua University/Jiangnan University), Ministry of Education, China E-mail: gyang@dhu.edu.cn (G.
It was found that the carbon sources could change both the structures and properties of BC.
Unlike celluloses of plant or wood origin, bacterial cellulose features a distinctive 3-D structure consisting of an ultrafine network of cellulose nanofibers (3-8 nm) [1].
It has been reported that both the structures and physical properties of bacterial cellulose could be influenced by the fermentation conditions of bacteria.
For example, Zhou et al. [3] obtained enhanced BC production yields and modification of cellulose structure by adding sodium alginate during fermentation.

The values of sonic modulus of fibrous structures are dependent on the orientation of components and packing density as well.
Introduction Studies of the fundamental dynamic mechanical properties of textile products are of prime importance if improvements to textile-processing equipment are to characterize textile structures.
The values of sonic modulus of fibrous structures are dependent on the orientation of components and packing density as well.
Neckář, Yarns creation, structure and properties, SNTL, Praha, 1990
Forina, Chemometrics in Analytical Chemistry, vol.

Therefore, the hydrothermal conditions will affect the structure of final product.
The treatment temperature determined the systemic driving forces,which eventually influences the pore structure of the nanotube aggregates. at high treatment temperature, Na2TiO3 tabular structure generated more completely with the same time, then the tabular structure rolled into nanotube followed by acid washing to remove electrostatic charges.
Microrod or board structure was produced with absolute ethyl alcohol washing in figure 5(d).
Novel nano-structured materials: synthesis and application, J.
Journal of Materials Chemistry. 17 (2007) 2095-2100.