The dust content, dust generation, ammonia production, and absorption properties of three different rodent bedding types

1996 ◽  
Vol 30 (1) ◽  
pp. 79-87 ◽  
Author(s):  
F. J. Potgieter ◽  
P. I. Wilke
Keyword(s):  
Moisture Absorption ◽  
Ammonia Concentration ◽  
Dust Content ◽  
Dust Particles ◽  
Ammonia Production ◽  
Dust Production ◽  
Absorption Properties ◽  
Eucalyptus Pulp ◽  
Dust Generation ◽  
Animal Activity

Vermiculite, pine shavings and unbleached eucalyptus pulp contact bedding were compared for dust content, dust production (as a result of animal activity), moisture absorption properties and ammonia production. The percentage of dust particles <300 µm found in pine shavings and vermiculite was 18 and 8 times greater respectively than was found in eucalyptus pulp. The lowest ammonia levels (<1-1 ppm), measured on day 7, were obtained using eucalyptus pulp. Although the ammonia levels obtained for vermiculite compared very well with those of pulp, high levels of dust, up to 5 times more than pulp, were experienced with vermiculite. Pine shavings were associated with the highest ammonia concentration (1-3 ppm), but produced approximately 50% less dust than vermiculite. The water absorption properties obtained for pulp were between 35% and 76% higher than those obtained for vermiculite and pine shavings respectively.

scholarly journals Modelling of dust generation, transport and remobilization in full-metal fusion reactors

2022 ◽  
Author(s):  
Svetlana Ratynskaia ◽  
Ladislas Vignitchouk ◽  
Panagiotis Tolias
Keyword(s):  
Initial Conditions ◽  
External Input ◽  
Dust Particles ◽  
Fusion Reactors ◽  
Dust Production ◽  
Dust Transport ◽  
Dust Generation ◽  
Wall Interaction ◽  
And Migration ◽  
Generation Mechanisms

Abstract The design, licensing and operation of magnetic confinement fusion reactors impose various limitations on the amount of metallic dust particles residing inside the plasma chamber. In this context, predictive studies of dust production and migration constitute one of the main sources of relevant data. These are mainly conducted using dust transport codes, which rely on coupled dust-plasma and dust-wall interaction models, and require external input on the dust and droplet initial conditions. Some particularities of dust modelling in reactor-relevant conditions are analyzed with an emphasis on dust generation mechanisms relevant for disruption scenarios and on dust remobilization mechanisms relevant for ramp-up scenarios. Emerging topics such as dust production by runaway electron impact and pre-plasma remobilization of magnetic dust are also discussed.

scholarly journals High-Speed Monitoring of Dust Particles in ITER ELMs Simulation Experiments with QSPA Kh-50

10.14311/1759 ◽  
2013 ◽  
Vol 53 (2) ◽  
Author(s):  
Vadym A. Makhlaj ◽  
Igor E. Garkusha ◽  
Nikolay N. Aksenov ◽  
Alexander A. Chuvilo ◽  
Igor S. Landman
Keyword(s):  
Heat Load ◽  
High Speed ◽  
Plasma Accelerator ◽  
Dust Particles ◽  
Plasma Stream ◽  
Maximal Velocity ◽  
Start Time ◽  
Simulation Experiments ◽  
Dust Generation ◽  
Load Average

Dust generation under powerful plasma stream impacts has been studied in ITER ELM simulation experiments with QSPA Kh-50 plasma accelerator. Repetitive plasma exposures of tungsten have been performed by 0.25 ms plasma pulses and the heat load varied in the range (0.1÷1.1) MJm-2. Main characteristics of dust particles such as a number of ejected particles, their velocity, angular distribution and start time from the surface are investigated. Dust particles have not been observed under heat load below the cracking threshold. Quantity of dust particles rises with increasing heat load. Average velocities of dust particles are found to be strongly dependent on their start time from the surface after beginning of plasma-surface interaction. Maximal velocity achieved a few tens of meters per second.

A review investigating the influence of nanofiller addition on the mechanical, thermal and water absorption properties of cellulosic fibre reinforced polymer composite

2021 ◽  
pp. 152808372110575
Author(s):  
Adnan Amjad ◽  
Aslina Anjang Ab Rahman ◽  
Habib Awais ◽  
Mohd Shukur Zainol Abidin ◽  
Junaid Khan
Keyword(s):  
Surface Treatment ◽  
Water Absorption ◽  
Polymer Composites ◽  
Moisture Absorption ◽  
Low Cost ◽  
Natural Fibre ◽  
Great Promise ◽  
Absorption Properties ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer

Composite holds great promise for future materials considering its advantages such as excellent strength, stiffness, lightweight, and cost-effectiveness. Due to rising environmental concerns, the research speed gradually changes from synthetic polymer composites to natural fibre reinforced polymer composites (NFRPCs). Natural fibres are believed a valuable and robust replacement to synthetic silicates and carbon-based fibres, along with biodegradability, recyclability, low cost, and eco-friendliness. But the incompatibility between natural fibre and polymer matrices and higher moisture absorption percentage of natural fibre limitise their applications. To overcome these flaws, surface treatment of natural fibre and nanofiller addition have become some of the most important aspects to improve the performance of NFRPCs. This review article provides the most recent development on the effect of different nanofiller addition and surface treatment on the mechanical, thermal, and wetting behaviour of NFRPCs. It concludes that the fibre surface treatment and nanofillers in natural fibre polymer composites positively affect mechanical, thermal and water absorption properties. A systematic understanding in this field covers advanced research basics to stimulate investigation for fabricating NFRPCs with excellent performance.

Contributions of the nanovoid structure to the moisture absorption properties of epoxy resins

1998 ◽  
Vol 36 (17) ◽  
pp. 3035-3048 ◽  
Author(s):  
Christopher L. Soles ◽  
Fernando T. Chang ◽  
Brett A. Bolan ◽  
Hristo A. Hristov ◽  
David W. Gidley ◽  
...  
Keyword(s):  
Epoxy Resins ◽  
Moisture Absorption ◽  
Absorption Properties

Mechanical, crystallisation and moisture absorption properties of melt drawn polylactic acid fibres

2014 ◽  
Vol 53 ◽  
pp. 270-281 ◽  
Author(s):  
Kazi M. Zakir Hossain ◽  
Andrew J. Parsons ◽  
Chris D. Rudd ◽  
Ifty Ahmed ◽  
Wim Thielemans
Keyword(s):  
Polylactic Acid ◽  
Moisture Absorption ◽  
Absorption Properties

Washing Cotton to Remove Dust

1984 ◽  
Vol 106 (1) ◽  
pp. 99-102
Author(s):  
P. E. Sasser ◽  
H. H. Perkins
Keyword(s):  
Continuous Process ◽  
Dust Content ◽  
Wetting Agent ◽  
Fiber Properties ◽  
Dust Generation ◽  
Project Objectives

Cottons were washed by continuous process to evaluate the effects of cleaning and washing conditions on nonlint content, dust generation during carding, and fiber properties. Washing conditions ranged in severity from a full scour and bleach to a mild water wash treatment using only a wetting agent. Differences related to washing conditions were noted in dust generation and on fiber properties. In relation to project objectives, the mild wash produced the best quality cotton. All washing treatments lowered the dust content of the fibers.

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