Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: January 2011
Authors: Ai Lan Wan, Weidong Yu
All the samples were cleaned by Soxhlet extraction with acetone and grain alcohol for 4h, air-dried and then rinsed thoroughly in distilled water to remove reagents, inorganic and proteinaceous materials.
Table 1 The roughness parameters of untreated and treated wool fibers Sample number Average (Ra) Root mean square (Rq) Peak-to-valley (Rpv) 0# 35.08 133.09 488.11 1# 59.30 234.62 726.23 2# 24.11 169.78 483.78 FTIR analysis The infrared spectra of the samples are shown in Fig. 2.
Table 3 Tensile properties of single wool fiber Sample number Breaking strength (deviation), [cN] Breaking extension (deviation),[%] Initial modulus (deviation), [cN/dtex] Breaking work (deviation), [mJ] 0# 6.32(1.34) 45.47(4.40) 28.76(7.94) 0.51(0.12) 1# 5.18(1.47) 45.51(6.11) 22.26(7.44) 0.41(0.13) 2# 5.07 (1.45) 48.69(8.43) 27.52(8.37) 0.44(0.15) Conclusions Wool fiber was treated by ozone-assisted treatment.
Online since: November 2011
Authors: Jun He, Qi Shan Wang
A large number of water supply plants don’t have a safe way, it has been a heavy burden for the waterworks, and caused the second-pollution on the environment [1]-[3] Ceramsite, as a kind of lightweight aggregate, attracts more attention for its light body, insulation and environment protection.
If the sludge could be made as the material which is used to fire the ceramsite, not only can solve the problems, but at the same time can dispose of a large number of sludge in the waterworks, realized the resource utilization.
Test of ceramsite quality Test items Test data grain composition (mm) 10~16 bulk density(kg/m3) 1200 strength of tube pressure(MPa) 8.0 water absorption(%) 1.0 frost resistance qualified solidity qualified Generally, bulk density and strength of tube pressure are introduced as two important parameters to assess ceramsite performance.
Online since: February 2011
Authors: Mohamed Nor Sabirin, Mazdida Sulaiman, Azilah Abd Rahman
The conductivity enhancement of composites is caused by the presence of great number of surfaces and interfaces [5].
The presence of some voids in the sample indicates poor contact between its grains.
The increase in conductivity is attributable to an increase in amorphicity in the sample and number of free Li+ ions due to increased interactions between Li2CO3 and Al2O3 as mentioned earlier.
Online since: April 2011
Authors: Antonio Miotello, Maurizio Dapor
In particular, dislocations, microvoids, high angle grain boundaries, vacancies, and matrix impurities are all trapping sites.
Let us indicate the hydrogen concentration by c, the number of traps per unit of volume in the membrane by N, the fraction of occupied traps by q, and the diffusion coefficient of the hydrogen in the considered system by D.
If qi is the occupied fraction of the Ni irreversible traps, then (5) (6) (7) where Ni is the number of irreversible traps, ki is the capture rate per irreversible trap and qi is the occupied fraction of the Ni irreversible traps.
Online since: November 2010
Authors: Bing Suo Pan, Xiao Hong Fang, Yong Chang Tian
Rock used was medium-fine grained biotite contained granite, whose hardness is 4470 MPa and compressive strength is 179.3 MPa.
(1) Where, yi is the weight of codeposited diamond; n is the number of observations.
Number of holes Total footage [m] Duration [h] Penetration rate [m/h] 1# 8 5.6 2.25 2.49 2# 8 5.6 2.33 2.40 3# 8 5.6 3.25 1.72 Fig. 2 Diamond distribution on bit face Fig. 3 Worn bit face Conclusions In this work codeposition technique of diamond in Fe deposit was studied.
Online since: June 2014
Authors: Xian Zhen Diao, Dong Zhou
Infrared spectrum study Molecular structures of samples analysed by German Bruker company's Equinox 55 type Fourier infrared spectrometer, scope of its wave number: 4000-400cm-1; Accuracy of wave number: ≤4cm-1(4000-2000), ≤2cm-1(2000-400); Resolution: 1.5 cm -1; Through the rate of accuracy: ±0.2%T; l0 line straightness:≤±2%T.
When calcining temperature is too high, however, grain growth, the effective surface area of TiO2 is reduced, REDOX ability is reduced, TiO2 surface active hydroxyl amount is reduced, and high temperature calcining can make the crystal structure of TiO2 from anatase to rutile type, so its photocatalytic activity also decreases.
Online since: January 2015
Authors: Shao Wei Pan, Miao Miao Zhang, Rui Xiang Liu
The pore here means the relatively broad part in the pore network system which is surrounded by rock grains and can contain fluid, and the throat means the relatively narrow part that connects the pores, which plays an important role in forming a channel.
Connect all these images according to random coordination number, we will then get a two dimensional random fractal network model of the pores.
Through the number of events that distributed exactly same with data of the estimated points in training image, a probability distribution could be concluded.
Online since: December 2014
Authors: Fang Yuan Yuan
Carburizing agent in superior efficiency, does not produce the decarburization layer on the surface of the carburizing, no grain boundary oxidation, surface clean and bright, small distortion.
Wear resistance and corrosion resistance have improved significantly. 4.In the field of medical polymer 1)Enhance the antimicrobial properties With the rapid development of biological medicine, every year there are a large number of implanted artificial organs or parts, but there are more than half of the implant infection.
Experimental results show that all kinds of nitrogen plasma (gaseous amide, amino compounds and ammonia) after processing, can be introduced in the material surface amino, promote the cell adhesion and growth, at the same time, the number and density of material surface amino is important for cell adhesion.
Online since: December 2014
Authors: Hao Dong Wang, Yan Hong Gu, Qing Xi Lu, Xiao Huang
Fig. 1 The chemical composition of soil in different places in Yanqing new town area Table 1 Chemical composition and classification of saline soil in the main sampling points in the new town area Serial number Sampling depth 0-0.05 m Serial number Sampling depth 0.5~0.55 m Cl- mg/kg SO42- mg/kg Saline soil type Cl- mg/kg SO42- mg/kg Saline soil type Y1 18.2 41.9 1.17 Sulfurous acid type Y1 146.8 623.0 0.118 Sulfuric acid type Y2 1286.7 5246.9 0.66 Y2 19.9 80.8 0.123 Y3 1888.4 2580.7 1.98 Y3 21.3 106.8 0.100 Y4 283.4 1745.9 0.44 Y4 39.0 147.9 0.132 Y5 18.3 168.5 0.29 Sulfuric acid type Y5 36.1 84.3 0.214 Y6 274.9 681.8 1.09 Sulfurous acid type Y6 20.3 76.9 0.132 Y7 183.8 1699.8 0.29 Sulfuric acid type Y7 48.5 249.6 0.097 Y8 410.8 1987.7 0.56 Sulfurous acid type Y8 29.6 106.8 0.138 Y9 145.7 1501.0 0.26 Sulfuric acid type Y9 21.0 68.2 0.154 Fig. 2 The salinity of saline soil change with depth Fig. 3 Partition map of saline soil type In the new town area, the
In the engineering construction, due to the shallow depth of saline soil, the saline soil can be directly excavated and replaced by easy compacted coarse-grained soil (such as sand), which can cut off the rise of harmful capillary water; more than 30 cm thick of compacted orthod should be laid on the top to isolate the infiltration of surface water, which can remove the salt expansion and corrosion harm of saline soil.
Online since: July 2016
Authors: Chun Lei Wan, Kaleem Ahmad, Hany S. Abdo, Mohammad A. Al-Eshaikh, Ahmed N. Kadachi, Rawaiz Khan
All the peaks are generally indexed to the standard BiSbTe PDF card number 49-1713.
The fractured surfaces of 0.5 vol. % BiSbTe/MWCNTs composite show in Fig. 5 the flake like lamellar grains of BiSbTe [9].
Acknowledgement This Project was funded by the National Plan for Science, Technology and Innovation (MAARIFAH), King Abdulaziz City for Science and Technology, Kingdom of Saudi Arabia, Award Number (11-NAN1913-02).
Showing 23891 to 23900 of 28673 items