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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 306 for “"Centrifugation"”.
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Fine Coal Dewatering Using Hyperbaric Centrifugation
… dewatering process called hyperbaric filter centrifugation (HFC) has been developed. This novel method combines centrifugation and pressure filtration within a single process to substantially reduce moistures over what can be achieved using conventional dewatering systems. In the current …
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The effects of aerobic digestion on centrifugation
… days, for run #1 and #2, respectively. Besides centrifugation, various water quality parameters were monitored during the two digestion runs. Results of this investigation indicated that the aerobic digestion process is suitable for waste activated sludge stabilization. Significant total and …
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Squat exercise biomechanics during short-radius centrifugation
Artificial gravity (AG) created by short-radius centrifugation is a promising countermeasure to the physiological de-conditioning that results from long-duration spaceflight. However, as on Earth, gravity alone does not ensure fitness. We will need to supplement passive exposure to AG with physical …
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Magnetically enhanced centrifugation for continuous biopharmaceutical processing
… separation process, called magnetically enhanced centrifugation (MEC), which exploits the interactions of magnetic particles with magnetic field gradients, forced convective flows and large centrifugal forces. Magnetically susceptible wires in a uniform magnetic field facilitate the capture and …
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A parametric study of vestibular stimulation during centrifugation
Artificial Gravity (AG) provided by short-radius centrifugation is a promising countermeasure to the health problems associated with long duration human spaceflight. Head-turns performed during centrifugation, however, trigger a disturbing vestibular response that is only qualitatively understood. …
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The Isolation of Friend Virus Protein by Zonal Centrifugation
… yield for immunological purposes by zonal centrifugation was the purpose of this experiment. Procedure. Sucrose gradient zonal centrifugation was used to isolate Friend virus polysomes. The concentration of the polysomes and the removal of the sucrose was accomplished by ultrafiltration. …
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Exercise protocols during short-radius centrifugation for artificial gravity
… combined with artificial gravity provided by centrifugation may be the comprehensive countermeasure needed to prevent such deconditioning. The aims of this study were (1) to characterize the physiological responses to longitudinal g-gradient and high g-levels during short-radius …
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Artificial gravity : neurovestibular adaptation to incremental exposure to centrifugation
(cont.) not build up adaptation, all subjects in the experimental group who completed the protocol showed signs of adaptation to the stimulus. Only one subject did not complete the five sessions, setting the drop-out rate at about 14%. If this conclusion holds true with more subjects, then a better …
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Cross plane transfer of vestibular adaptation to human centrifugation
Human short-radius centrifugation (SRC) is being investigated as a volume-efficient means of delivering intermittent doses of "artificial gravity" to counter the deleterious effects of long exposures to weightlessness. Rotation rates on short radius centrifuges are high to provide the needed …
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Incremental adaptation to yaw head movements during 30 RPM centrifugation
Artificial Gravity (AG) provided by short-radius centrifugation is a promising countermeasure against the harmful physiological effects of prolonged weightlessness. However, the vestibular stimulus associated with making head movements while rotating presents a challenge. During a head movement, …
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Tube centrifugation for processing platelet-rich plasma in the horse
… PRP produced by three simple, inexpensive tube centrifugation methods and compare the results to a commercial system. Citrated blood collected from 26 normal horses was processed by four methods: blood collection tubes centrifuged at 1200 and 2000 x g, a 50ml conical tube, and a commercial …
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The effect of head turn velocity on Cross-coupled Stimulation during centrifugation
… of long-duration space flight. Short-radius centrifugation (SRC) provides a practical means of producing AG, though perceptual side-effects may potentially limit its operational feasibility. Head-turns in the rotating environment of SRC produce Cross-coupled Stimulation (CCS), which the …
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Purification of Human Immunodeficiency Virus Type 1 Preintegration Complexes by Velocity Gradient Centrifugation.
… the efficiency of several velocity gradient centrifugation (VGC) parameters for purifying NPCs. The sedimentation patterns of NPCs were determined by analyzing the distribution of known interacting viral proteins in gradient fractions. My results indicate that short velocity gradient …
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Artificial gravity : the role of visual inputs in adaptation to short-radius centrifugation
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.
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Defining an Optimal Range of Centrifugation and Concentration Parameters for Canine Semen Processing
… we need to process the semen samples using centrifugation and dilution with extenders to help preserve the breeding dose and semen quality. Our objective was to determine a clinically relevant range of centrifugation and concentration parameters for processing canine semen. In the first …
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Artificial gravity : evaluation of adaptation to head movements during short-radius centrifugation using subjective measures
… head movements made during short-radius centrifugation. The hypothesis for the experiment was as follows: Repeated exposure to a series of yaw head movements made during short-radius centrifugation at 23rpm, (with the subject lying supine and the head on the axis of rotation) will result …
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Artificial gravity : adaptation of the vestibulo-ocular reflex to head movements during short-radius centrifugation
Short-radius centrifugation is currently being pursued as a potential countermeasure to long duration space flight. Short-radius centrifugation requires relatively high angular velocities (on the order of 30 rpm) to create centripetal accelerations on the order of 1 g. Unfortunately, out-of-plane …
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A cost effectiveness analysis of different ways of analyzing sputum for turberculosis diagnosis: direct smear microscopy, natural sedimentation and centrifugation
… with gravity (natural) sedimentation and centrifugation. This study estimated the costs and cost-effectiveness of these techniques in processing sputum for detecting new cases of pulmonary tuberculosis in Malawi. Bleach natural sedimentation and bleach centrifugation methods were compared …
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Dewatering Of Biosolids By Sodium Ferrate
… to evaluate and compare their effectiveness. Centrifugation and filtration of the sludge after conditioning were used. For centrifugation the volume reduction and the turbidity of the supernatant after centrifugation were evaluated. For filtration, the Capillary Suction Time test was used. The …
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