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Showing 1 to 20 of 63 for “"PFA"”.
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Crystallisation of PFA glasses
Glasses with various compositions, falling in the CaO-AI20rSi02 and MgO-CaOAI20rSi02 systems were made, using pulverised fuel ash and silica, hydrated lime, kaolin and magnesium carbonate. Titania or ferric oxide and chromia were used as nucleants. Various crystallisation heat treatments were …
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Factors influencing the strength development in pfa-lime systems
Pulverised fuel ash (pfa) has been mixed with lime and water, pressed into cylinders, and cured in 100% r.h. at temperatures of 50°C, 75°C and 95°C for times of between 30 minutes and 28 days.<br/><br/>The expansion of the cylinders and their unconfined compressive strengths have been measured at …
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The use of Lethabo field 2 PFA in pavement quality concrete
… The inclusion of Pulverised Fuel Ash (PFA), otherwise known as fly ash, generally improves the quality of pavement concrete and thus extends its useful life. The PFA used for the thesis was from the Lethabo power station's second electrostatic precipitator field (Lethabo Field 2 PFA). …
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The performance of a blended PFA/GGBS alkali-activated concrete using a silica fume-based activator
… activator (Regime B) chemically activating PFA: GGBS mix compositions (50PFA: 50GGBS, 40PFA: 60GGBS, 30PFA: 70GGBS, 20PFA: 80GGBS) combined with a range of water-to-binder ratio’s 0.40, and 0.42 showed promising results from a minimum performance perspective (≥ C32/40 compressive strength …
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Hydration, Pore Development and Chemical Resistance of Metakaolin - Fly Ash - Portland Cement (MK-PFA-PC) Blends
The aim of the project is to utilise fly ash (PFA), a waste material / industrial byproduct, with metakaolin (MK), as a partial replacement for Portland cement (PC) in mortar and paste. The influence of various compositions of MK-PFA-PC blends on the resistance to the action of sulphate and …
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Mix design, fresh and hardened properties and microstructural characterisation of alkali-activated concrete based on PFA/GGBS blends
… salient parameters such as percentage of GGBS in PFA/GGBS blend, paste content, binder content, water-to- solid ratio (w/s) on setting time, workability and compressive strength of AAC is investigated. The findings obtained from this investigation helped to suggest mix design guidelines for …
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Plainchant and liturgy in the diocese of Münster in Westphalia : the fifteenth-century Freckenhorst antiphoner (D-MÜd PfA 53)
… Freckenhorst, StBonifatius Hs. 53 (D-MÜd PfA 53) is an antiphoner (antiphonary/antiphonal) that theFraterherren of Münster wrote in the middle of the fifteenth century. The plainchantmelodies are in German neumatic notation (Hufnagelschrift) and the texts are in Gothictextualis textura, …
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Studie zur Bedeutung der In-vitro-Blutungszeitmessung mit dem PFA 100 für die Vorhersage peri- und postoperativer Blutungskomplikationen in der Gynäkologie
… of the new platelet function analyzer 100 (PFA 100™) compared to the standard coagulation tests and a patients history concerning coagulation. In addition to this we proved the thrombocyte function during operations. 116 patients who underwent gynaecological surgery were included. All …
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The effect of processing method of broiler litter on pasteurization, nitrogen loss and nitrogen utilization by sheep
… the addition of 1 to 4 g of paraformaldehyde (PFA) per 100 g of litter at depths of 0.63 and 2.54 cm; and ethylene oxide (ETO) fumigation for 30 min. or longer. Moisture and uric acid nitrogen were lowered (P < .01) for dry heat and the PFA processes. Autoclaving and PFA addition followed by …
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Evaluation of a phytogenic feed additive on performance, nutrient digestion, and absorption in turkey poults
… or the NC with the addition of Digestarom® (PFA) included at a rate of 1 g/kg. Body weight gain (BWG), feed intake (FI), feed efficiency (FE), and mortality were recorded throughout the experiment. On day 14 poults fed the PFA had significantly higher BWG compared to the PC and NC fed birds. …
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The mineralogy and chemistry of pulverised fuel ash produced by three South African coal-burning power stations
… are presented for 63 pulverized fuel ash (PFA) and 16 input coal samples collected from Lethabo, Duvha and Matla power stations over the period 1987-1988. Bulk chemical composition was determined by X-ray fluorescence spectrometry. The mineral concentrations were determined by …
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The effect of acid mixtures on biomass cellulose poly (Furfuryl) alcohol nanocomposites
… were encapsulated in a poly (furfural) alcohol (PFA) matrix via in situ polymerization process in the presence of P-toluene sulfonic acid as a catalyst to produce cellulose PFA nanocomposites. Furthermore, the study investigates the effect of mixed acid concentration on the morphology, …
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Biochemical Characterization of Two Aminopeptidases Involved in Hemoglobin Catabolism in the Food Vacuole of Plasmodium falciparum
… the host hemoglobin. Two metalloaminopeptidases, PfAPP and PfA-M1, have been previously localized to the food vacuole (in addition to distinct secondary locations for each), implicating them in the final stages of hemoglobin catabolism. Prior genetic work has determined these enzymes are necessary …
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Particle detector optimization via particle flow algorithms
… the performance of Mat Charles' NonTrivialPfa.java PFA for several different detector variations was found by determining the mass resolution for a given detector geometry. The variations tested included the layering of the hadronic calorimeter, the radius of the calorimeter, the …
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Methodology to determine performance of a group technology design cell on the basis of performance measures
… algorithm (ROC) and Production Flow Analysis (PFA). Using ROC and PFA, part families and machines groups were formed creating cell layouts. From the given data, performance measure values were calculated for a functional layout as well as ROC and PFA layouts. Performance of ROC and PFA layouts …
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Immediate effects of a relaxation treatment upon subject perception of facial expression of emotion
… treatment. The Pictures of Facial Affect (PFA) was administered to both groups to measure the subject's perception of facial expression of emotion. The PFA consists of 110 high quality slides which depict 7 facial expressions of emotion. The 7 subtests of, the PFA include: happy, sad, fear, …
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TEMPOROMANDIBULAR JOINT DISORDERS AND NASAL SEPTUM DEVIATION IN DENTOFACIAL DEFORMITY PATIENTS
… disorders (TMD), and posterior facial asymmetry (PFA) as determined by nasal septum deviation were analyzed. In addition, the data will aid in the development of a phenomics database to allow for subsequent genotyping and gene expression evaluation from patient saliva and masseter muscle samples …
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Die Bedeutung von Risikofaktoren für das Auftreten von Komplikationen nach Nierenbiopsie
… die Auswirkung des platelet function analyzers PFA-100TM auf das Blutungsrisiko nach Biopsie zu erheben. Zudem wurde der Einfluss des Alters, des Geschlechts, der Nadelgröße, des Beobachtungszeitraumes, des Hämoglobinwertes, der Blutgerinnung, von Begleiterkrankungen, der nephrologischen …
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