Real-Space Reconstructions of Non-Ideal Helical Models

1985 ◽  
Vol 43 ◽  
pp. 308-309
Author(s):  
David A. Bluemke ◽  
Bridget Carragher ◽  
Michael J. Potel
Keyword(s):  
Particle Size ◽  
Large Particle ◽  
Real Space ◽  
Two Dimensional ◽  
Large Particle Size ◽  
Variable Pitch ◽  
Negative Stain ◽  
The Fourier Transform ◽  
Particle Imaging

We have studied the effects of variable pitch, particle flattening, particle curvature, imaging noise and variable negative stain on two dimensional (2D) real-space reconstructions using electron density models of the sickle cell hemoglobin (HbS) macrofiber. The HbS macrofiber, a 500 A diameter helical particle with a pitch of about 10,000 A, is formed in vitro at pH < 7.1. The Fourier transform of the particle is extremely complex due to disorder, large particle size, and variable pitch, making the indexing required for Fourier-Bessel reconstructions very difficult. However, real-space techniques require fewer assumptions about the particle order. Preliminary particle reconstructions have led us to consider the effect of non-ideal particle imaging on the reconstruction result.

Hevea Latex of Large Particle Size

1939 ◽  
Vol 31 (12) ◽  
pp. 1509-1512 ◽  
Author(s):  
J. McGavack
Keyword(s):  
Particle Size ◽  
Large Particle ◽  
Large Particle Size

Microwave-assisted removal of sulfur in large particle size coal by bromine water

Fuel ◽  
2021 ◽  
Vol 289 ◽  
pp. 119838
Author(s):  
Xiaogang Mu ◽  
Jinfang Liu ◽  
Fei Gao ◽  
Cunbao Deng ◽  
Zhixin Jin ◽  
...  
Keyword(s):  
Particle Size ◽  
Large Particle ◽  
Large Particle Size ◽  
Bromine Water ◽  
Microwave Assisted

Direct synthesis of zeolite Y with large particle size

2001 ◽  
Vol 3 (7) ◽  
pp. 773-780 ◽  
Author(s):  
Samia Ferchiche ◽  
Juliusz Warzywoda ◽  
Albert Sacco
Keyword(s):  
Particle Size ◽  
Large Particle ◽  
Zeolite Y ◽  
Direct Synthesis ◽  
Large Particle Size

scholarly journals Influence of bagasse ash with different fineness on alkali-silica reactivity of mortar

2018 ◽  
Vol 68 (332) ◽  
pp. 169 ◽  
Author(s):  
S. Ramjan ◽  
W. Tangchirapat ◽  
C. Jaturapitakkul
Keyword(s):  
Particle Size ◽  
Compressive Strength ◽  
Portland Cement ◽  
Large Particle ◽  
Ordinary Portland Cement ◽  
Alkali Silica Reaction ◽  
Large Particle Size ◽  
High Compressive Strength ◽  
Alkali Silica Reactivity

This research aimed to study the effect of finenesses of bagasse ash (BGA) on the alkali-silica reaction of mortar. The BGA sample was ground to have particles retained on a sieve No. 325 of 33±1% and 5±1% by weight. Ground BGA samples were used separately to replace ordinary Portland cement (OPC) at rates of 10, 20, 30 and 40% by weight of binder to cast mortars. The compressive strengths and the alkali-silica reaction (ASR) of mortars were investigated. The results showed that a large particle size of BGA is not suitable for use in lowering ASR because it results in a low compressive strength and high expansion due to ASR. The mortars containing BGA with higher fineness exhibited higher compressive strength and lower expansion due to ASR than the mortars containing BGA with lower fineness. The results also suggested that the ground BGA retained on a sieve No. 325 of less than 5% by weight is suitable to be used as a good pozzolan which provides high compressive strength and reduces the expansion of mortar due to ASR even though it contains high LOI. The obtained results also encourage the utilization of ground BGA effectively which leads to reduce the disposal of bagasse ash.

scholarly journals RESEARCH ON STABILITY OF FISHING BANK MADE BY LARGE PARTICLE SIZE POROUS CONCRETE PLACED UNDER SEA : Experiment using large scale waterway(Materials and Construction)

2005 ◽  
Vol 11 (22) ◽  
pp. 53-58
Author(s):  
Akihiro MAEGAWA ◽  
Toshihiko SHAKOUCHI ◽  
Yukihisa YUASA ◽  
Naoki MISHIMA ◽  
Shigemitsu HATANAKA
Keyword(s):  
Particle Size ◽  
Large Particle ◽  
Large Scale ◽  
Large Particle Size ◽  
Porous Concrete

Analysis on the Gravel Stratum Deformation by Dewatering

2007 ◽  
Vol 353-358 ◽  
pp. 3022-3025
Author(s):  
Wen Zhao ◽  
Yan Xu ◽  
Hai Xia Sun
Keyword(s):  
Particle Size ◽  
Groundwater Level ◽  
Large Particle ◽  
Ground Deformation ◽  
Dynamic Balance ◽  
Shallow Groundwater ◽  
Large Particle Size ◽  
Stress Deformation ◽  
Stratum Deformation ◽  
Shallow Groundwater Level

Large particle-size, shallow groundwater level, and large permeate coefficient are the characteristics of gravel stratum, which may results in large ground deformation. Ground deformation depends on several factors. Using the RFPA2D-Flow software exploited by the Center for Rock Instability and Seismic Research of Northeastern University (CRISR), the seepage-stress-deformation coupling rules of soil, which are influenced by different soil distributing, drawdown, enclosure and excavating, were analyzed, and the deformation of gravel in the dynamic balance due to the interaction between seepage and stress is studied.

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