Particle size distribution and particle mass measurements at urban, near-city and rural level in the Copenhagen area and Southern Sweden M. Ketzel , P. Wåhlin, A. Kristensson, E. Swietlicki, R. Berkowicz, O. J. Nielsen, and F. Palmgren Department of Atmospheric Environment, National Environmental Research Institute, Roskilde, Denmark Division of Nuclear Physics, Physics Department, Lund Univers...

low molecular weight heparin-modified isoliquiritigenin-loaded solid lipid nanoparticle (lmwh-isl-sln) was developed for injective application. the morphological observation, particle diameter and zeta potential of lmwh-isl-sln were characterized using transmission electron microscopy (tem) and a malvern zetasizer. its entrapment efficiency (ee) and drug loading (dl) were determined by ultracen...

in this study, the effects of particle size distribution improvement and dense packing techniques on the 28- and 90-day compressive strengths of class g oil well cement have been investigated. it was observed that limited improvements in the particle size distribution of cement (regarding industrial possibilities) cannot result in a significant increase in 28- and 90-day compressive strengths. ...

in the present study, five log-normal models, normal model (n), and two four- parameter models namely gompertz (g) and fredlund (fr) were tested on 71 psd data from 10 soil textural classes. the jaky (j) and fr models had the smallest and largest r2 values for all of the soils, respectively. the results of comparing the n and simple log-normal (sl) models showed that the accuracy of the n model...

0

Aerosol solvent extraction system (ASES) was used to prepare micro-particle of acetaminophen by supercritical carbon dioxide as an anti-solvent. Experiment was carried out at various temperatures, pressures, solvents and investigated the effects of these parameters on particle size, size distribution and morphology by SEM and laser diffraction particle size analyzer. It seems that the choice of...

Particle size distribution (PSD) is a fundamental physical property of soils. Traditionally, the PSD curve was generated by hand from limited data of particle size analysis, which is subjective and may lead to significant uncertainty in the freehand PSD curve and graphically estimated cumulative particle percentages. To overcome these problems, a log-cubic method was proposed for the generation...

a prototype of a straw chopper, equipped with a discharge system was designed and fabricated in the department of mechanics of agricultural machinery, university of tehran, karaj, iran. to test for the effective performance of the machine, the effects of such parameters as: drum speed (at three levels of: 400, 540, and 800 rpm), screen size (at two levels: 2.5 and 4 cm), and number of blades on...

Image analysis has made decisive breakthrough in the recent years to become a reference technique in the field of combined size and shape analysis of particles. Thanks to full automation of the particle dispersion and the individual particle imaging process, productivity of the instrument is no longer a major drawback. However the question of representativity of analyses has not been discussed ...

This work focuses on the size distribution of sneeze droplets exhaled immediately at mouth. Twenty healthy subjects participated in the experiment and 44 sneezes were measured by using a laser particle size analyser. Two types of distributions are observed: unimodal and bimodal. For each sneeze, the droplets exhaled at different time in the sneeze duration have the same distribution characteris...