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Resultaten voor 'diane hildebrand'
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Production microbienne de carburant et de produits chimiques à partir de patates douces
L'utilisation intensive des combustibles fossiles au fil des ans a entraîné une augmentation des prix de l'essence et de l'électricité ainsi que des impacts négatifs sur l'environnement résultant de l'augmentation des émissions de gaz à effet de serre (GES). Il est donc nécessaire de trouver une source d'énergie renouvelable et plus respectueuse de l'environnement. L'objectif de cette étude était de produire une source alternative de carburant sous forme de biocarburants à partir de tubercules de patate douce en utilisant un bioréacteur à lit fluidisé (FBBR) à l'échelle du laboratoire. Les bactéries isolées du tubercule de patate douce ont été identifiées sur la base de leur séquence d'ARNr 16S en utilisant la PCR de colonie suivie du séquençage. La fermentation discontinue a été réalisée en utilisant le milieu de croissance minimale M9 et le milieu GP et un consortium des espèces bactériennes identifiées. Trois temps de rétention hydraulique (HRT) de 6 heures, 3 jours et 12 jours ont été étudiés. Le FBBR a été utilisé à chaque HRT pendant 42 jours avec un intervalle de 14 jours. La dynamique de la croissance bactérienne a été suivie par des comptages de plaques tandis que l'attachement des cellules sur le charbon actif granulaire (GAC) a été étudié à l'aide d'un microscope électronique à balayage (SEM).
€ 71,90 -
Produzione microbica di carburante e sostanze chimiche con le patate dolci
L'uso estensivo di combustibili fossili nel corso degli anni ha comportato un aumento dei prezzi della benzina e dell'elettricità, nonché un impatto negativo sull'ambiente a causa dell'aumento delle emissioni di gas serra (GHG). È quindi necessario trovare una fonte di energia rinnovabile e più rispettosa dell'ambiente. Lo scopo di questo studio è stato quello di produrre una fonte di combustibile alternativo sotto forma di biocarburante dal tubero di patata dolce utilizzando un bioreattore a letto fluido (FBBR) in scala di laboratorio. I batteri isolati dal tubero di patata dolce sono stati identificati in base alla loro sequenza di 16S rRNA mediante PCR su colonia seguita da sequenziamento. La fermentazione in batch è stata condotta utilizzando il terreno di crescita minimo M9 e il terreno GP e un consorzio delle specie batteriche identificate. Sono stati studiati tre tempi di ritenzione idraulica (HRT) di 6 ore, 3 giorni e 12 giorni. Il FBBR è stato fatto funzionare a ciascun HRT per 42 giorni con un intervallo di 14 giorni. Le dinamiche di crescita batterica sono state monitorate mediante la conta delle piastre, mentre l'attaccamento delle cellule al carbone attivo granulare (GAC) è stato studiato al microscopio elettronico a scansione (SEM).
€ 71,90 -
Producción microbiana de combustible y productos químicos con batatas
El uso extensivo de combustibles fósiles a lo largo de los años ha provocado un aumento de los precios de la gasolina y la electricidad, así como impactos negativos en el medio ambiente derivados del aumento de las emisiones de gases de efecto invernadero (GEI). Por ello, es necesario encontrar una fuente de energía renovable y más respetuosa con el medio ambiente. El objetivo de este estudio era producir una fuente de combustible alternativa en forma de biocombustibles a partir del tubérculo de la batata utilizando un biorreactor de lecho fluidizado (FBBR) a escala de laboratorio. Las bacterias aisladas del tubérculo de la batata se identificaron a partir de su secuencia de ARNr 16S mediante PCR de colonias seguida de secuenciación. La fermentación por lotes se llevó a cabo utilizando el medio de crecimiento mínimo M9 y el medio GP y un consorcio de las especies bacterianas identificadas. Se investigaron tres tiempos de retención hidráulica (TRH) de 6 horas, 3 días y 12 días. El FBBR fue operado en cada HRT durante 42 días con un intervalo de 14 días. La dinámica de crecimiento de las bacterias se controló mediante recuentos en placa, mientras que la fijación de las células en el carbón activado granular (CAG) se estudió mediante un microscopio electrónico de barrido (MEB).
€ 71,90 -
Mikrobielle Kraftstoff- und Chemieproduktion mit Süßkartoffeln
Dr. Mannana Ntoampe promovierte an der University of the Witwatersrand im Fachbereich Chemie- und Metallurgietechnik. Ihre Interessen liegen in den Bereichen Ingenieurwesen, Umwelt und erneuerbare Energien. Prof. Dr. Diane Hildebrandt und Prof. Dr. David Glasser sind die Direktoren für Material- und Prozesssynthese an der UNISA, SA, und haben über 150 wissenschaftliche Arbeiten verfasst.
€ 71,90 -
Produção Microbiana de Combustível e Química com Batata Doce
A utilização extensiva de combustíveis fósseis ao longo dos anos resultou no aumento dos preços da gasolina e da electricidade, bem como no impacto negativo no ambiente resultante do aumento das emissões de gases com efeito de estufa (GEE). Existe, portanto, a necessidade de uma fonte de energia renovável e mais amiga do ambiente. O objectivo deste estudo era produzir uma fonte alternativa de combustível sob a forma de biocombustíveis a partir de tubérculos de batata doce, utilizando um Bio-Reactor de Leito Fluidizado à escala laboratorial (FBBR). Foram identificadas bactérias isoladas a partir de tubérculo de batata-doce com base na sua sequência de 16S rRNA utilizando PCR de colónia, seguida de sequenciação. A fermentação do lote foi operada utilizando o meio de crescimento mínimo M9 e o meio GP e um consórcio das espécies bacterianas identificadas. Foram investigados três Tempos de Retenção Hidráulica (HRTs) de 6 horas, 3 dias e 12 dias. O FBBR foi operado em cada HRT durante 42 dias com um intervalo de 14 dias. A dinâmica de crescimento bacteriano foi monitorizada por contagem de placas enquanto a fixação de células em carvão activado granular (GAC) foi estudada usando microscópio electrónico de varrimento (SEM).
€ 71,90 -
Chemicals and Fuels from Biomass via Fischer–Tropsch Synthesis
A Route to SustainabilityIntegrating technological development and business development rationales to highlight the key technological developments that are necessary to industrialize biofuels on a global scale, this book focusses on the key challenges that still hinder the effective biomass use and the realization of zero fossil fuel.
€ 248,50 -
Attainable Region Theory
An Introduction to Choosing an Optimal ReactorDavid Ming holds a B.Sc. and Ph.D. in chemical engineering from the University of the Witwatersrand, Johannesburg. His research interests involve using AR theory to optimize chemical reactors, including batch reactors, and AR numerical methods. David Glasser is a Professor of Chemical Engineering and co-director of the Material and Process Synthesis (MaPS) research unit at the University of South Africa (UNISA). He was Head of Department of Chemical Engineering, and Dean of the Faculty of Engineering at University of the Witwatersrand, and is one of the co-founders of AR theory. He holds a B.Sc. in chemical engineering from University of Cape Town, and a Ph.D. in chemical engineering from Imperial College. Diane Hildebrandt is a Professor of Chemical Engineering and co-Director of the MaPS research unit at UNISA. She was the first woman in South Africa to be appointed a full professor of Chemical Engineering when she was the Unilever Professor of Reaction Engineering at the University of the Witwatersrand, and is also a co-developer of AR theory. She holds a B.Sc., M.Sc. and Ph.D. in chemical engineering from University of the Witwatersrand. Her research area is the reduction of CO2 emissions through the design of energy efficient processes. Benjamin Glasser is a Professor of Chemical and Biochemical Engineering at Rutgers University, New Jersey, USA. He holds a B.Sc. and M.Sc. in chemical engineering from University of the Witwatersrand, and a Ph.D. in chemical engineering from Princeton University. His research interests include heat and mass transfer, multiphase reactors and particle technology applied to chemical and pharmaceutical manufacturing. Matthew Metzger is a Senior Scientist at Merck & Co., Inc. He has co-authored over 14 publications, holds a B.S. in chemical engineering from Lafayette University, and a Ph.D. in chemical engineering from Rutgers University.
€ 232,95 -
Understanding Distillation Using Column Profile Maps
Column Profile Maps (CPMs) provide one versatile tool that can be applied to wide range of separation synthesis problems. This book provides all the necessary guidance to create, optimize, design, and analyze distillation and related separation processes using novel, graphical techniques.
€ 195,50 -
FRCS General Surgery Section 1: 500 SBAs and EMIs
Second EditionFRCS General Surgery Section 1: 500 SBAs and EMIs, Second Edition has been thoroughly revised to ensure the content remains completely up to date and accurate. With 50 new questions, FRCS General Surgery Section 1: 500 SBAs and EMIs offers the most relevant and comprehensive set of practice questions for trainees preparing for the exam.
€ 69,50 -
Membrane Process Design Using Residue Curve Maps
Design and Synthesis of Membrane Separation Processes provides a novel method of design and synthesis for membrane separation. While the main focus of the book is given to gas separation and pervaporation membranes, the theory has been developed in such a way that it is general and valid for any type of membrane.
€ 186,95 -
Microbial Fuel and Chemical Production Using Sweet Potatoes
Extensive use of fossil fuels over the years has resulted in increased petrol and electricity prices as well as negative impacts on the environment resulting from increased Green House Gas (GHG) emissions. There is therefore a need for a renewable and more environmental friendly source of energy. The aim of this study was to produce an alternative fuel source in a form of biofuels from sweet potato tuber using a laboratory-scale Fluidized Bed Bio-Reactor (FBBR). Bacteria isolated from sweet potato tuber were identified based on their 16S rRNA sequence using colony PCR followed by sequencing. Batch fermentation was operated using M9 minimal growth medium and GP medium and a consortium of the identified bacterial species. Three Hydraulic Retention Times (HRTs) of 6 hours, 3 days and 12 days were investigated. FBBR was operated at each HRT over 42 days with a 14 day interval. Bacterial growth dynamics were monitored by plate counts while cell attachment on granular activated charcoal (GAC) was studied using scanning electron microscope (SEM).
€ 71,90