Gotowe bibliografie tematyczne / Selective filtration

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Gotowa bibliografia na temat „Selective filtration”

Autor: Grafiati

Data publikacji: 30 listopada 2024

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Artykuły w czasopismach na temat "Selective filtration"

Malchesky, P. S., T. Horiuchi, M. Usami, M. Emura i Y. Nose. "Blood Detoxification by Membrane Plasma Filtration". International Journal of Artificial Organs 9, nr 5 (wrzesień 1986): 349–54. http://dx.doi.org/10.1177/039139888600900518.

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The recognition of macromolecule abnormalities in various metabolic or immunologic related disease states has led to the use of plasma exchange for therapeutics. Limitations of plasma exchange, however, exist. Membrane plasma filtration provides a practical alternative. Solute removal can be made selective by the choice of operating conditions as temperature and the selection of the membrane/module design. The optimal temperature range is a function of the plasma type, solute concentrations and membrane system. Operation at below physiologic temperature (cryofiltration) is particularly suited for the removal of cold aggregative solutes, while operation at near or above physiologic temperature is more suited for the separation of solutes having large size differences at normal physiologic temperature. Membrane filtration is simple and safe to perform, is more selective than plasma exchange, does not require plasma product infusion and is more versatile than selective sorption in its applications.

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Lu, Wei-Ming, i Shang-Chung Ju. "Selective Particle Deposition in Crossflow Filtration". Separation Science and Technology 24, nr 7-8 (czerwiec 1989): 517–40. http://dx.doi.org/10.1080/01496398908049789.

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Pepper, Duncan S. "Selective blood filtration for therapy and prophylaxis". Trends in Biotechnology 3, nr 7 (lipiec 1985): 161–62. http://dx.doi.org/10.1016/0167-7799(85)90114-3.

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Yaroshchuk, Andriy E., Yuriy P. Boiko i Alexandre L. Makovetskiy. "Filtration Potential across Membranes Containing Selective Layers". Langmuir 18, nr 13 (czerwiec 2002): 5154–62. http://dx.doi.org/10.1021/la025503s.

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Dyatkin, Boris. "Atomic layer deposition yields highly selective filtration membranes". MRS Bulletin 44, nr 1 (styczeń 2019): 10. http://dx.doi.org/10.1557/mrs.2019.3.

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Lempereur, Valérie, Celine Louaisil i François Davaux. "Reducing pesticide level in wine by selective filtration". BIO Web of Conferences 3 (2014): 02007. http://dx.doi.org/10.1051/bioconf/20140302007.

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Paul, Sumona, Sagar Roy i Somenath Mitra. "Carbon nanotube enhanced selective micro filtration of butanol". Separation and Purification Technology 330 (luty 2024): 125462. http://dx.doi.org/10.1016/j.seppur.2023.125462.

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Chon, Jung-Whan, Hong-Seok Kim, Dong-Hyeon Kim, Young-Ji KIM, Kidon Sung, Hyunsook Kim i Kun-Ho Seo. "Efficacy of Syringe Filtration for the Selective Isolation of Campylobacter from Chicken Carcass Rinse". Journal of Food Protection 80, nr 6 (17.05.2017): 1050–53. http://dx.doi.org/10.4315/0362-028x.jfp-16-470.

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ABSTRACT We investigated the efficacy of syringe filtration for selective isolation of Campylobacter from chicken carcass rinse by combining syringe filtration with the conventional culture method. Whole chicken carcass rinses were incubated in Bolton enrichment broth, set aside or subjected to syringe filtration, and streaked on Campy-Cefex agar with or without cefoperazone antibiotic supplement. Compared with the conventional method without filtration, 0.65-μm-pore-size syringe filtration resulted in a significantly higher number of Campylobacter-positive samples (23.8 to 37.5% versus 70.0 to 72.5%; P < 0.05), a lower number of plates contaminated with non-Campylobacter (93.8% versus 6.3 to 26.3%), and a lower growth index (1 = growth of a few colonies; 2 = growth of colonies on about half of the plate; and 3 = growth on most of the plate) for competing microbiota (2.9 to 3.0 versus 1.2 to 1.4). When syringe filtration was applied, agar plates containing the antibiotic had significantly less contamination (6.3% versus 26.3%; P < 0.05) and a lower growth index (1.2 versus 1.4) compared with plates without the antibiotic, although the Campylobacter isolation rate was similar (P > 0.05). Syringe filtration combined with conventional enrichment improved the rate and selectivity of Campylobacter isolation from chicken carcasses.

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Takao, Junku, Reina Nagai, Tatsuro Endo, Hideaki Hisamoto i Kenji Sueyoshi. "Aptamer Selection Based on Microscale Electrophoretic Filtration Using a Hydrogel-Plugged Capillary Device". Molecules 27, nr 18 (8.09.2022): 5818. http://dx.doi.org/10.3390/molecules27185818.

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This study reports a novel aptamer selection method based on microscale electrophoretic filtration. Aptamers are versatile materials that recognize specific targets and are attractive for their applications in biosensors, diagnosis, and therapy. However, their practical applications remain scarce due to issues with conventional selection methods, such as complicated operations, low-efficiency separation, and expensive apparatus. To overcome these drawbacks, a selection method based on microscale electrophoretic filtration using a capillary partially filled with hydrogel was developed. The electrophoretic filtration of model target proteins (immunoglobulin E (IgE)) using hydrogel, the electrokinetic injection of DNAs to interact with the trapped proteins, the elimination of DNAs with weak interactions, and the selective acquisition of aptamer candidates with strong interactions were successfully demonstrated, revealing the validity of the proposed concept. Two aptamer candidates for IgE were obtained after three selection cycles, and their affinity for the target was confirmed to be less than 1 nM based on their dissociation constant (KD) values. Therefore, the proposed method allows for the selection of aptamers with simple operations, highly effective separation based on electrophoresis and filtration, and a relatively cheap apparatus with disposable devices.

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Ugweje, Okechukwu C. "Selective noise filtration of image signals using wavelet transform". Measurement 36, nr 3-4 (październik 2004): 279–87. http://dx.doi.org/10.1016/j.measurement.2004.09.009.

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Rozprawy doktorskie na temat "Selective filtration"

Rodrigues, Ana Raquel Gonçalves. "Fibrous membranes for selective filtration of juices". Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14920.

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Mestrado em Biotecnologia - Biotecnologia Alimentar
The present study proposes the development of electrospun fibrous membranes with high selectivity and affinity for patulin retention throughout the apple juice clarification process. Nanostructured bi- and tridimensional materials can be obtained by electrospinning with very large surface-to-volume ratio, high porosity and interconnectivity, making them very attractive for a large number of applications including separation processes. Other remarkable methodology is the molecular imprinting. This is a technique that creates molecularly imprinted cavities with memory capacity from the interaction between a template molecule and a functional monomer or polymer segment for binding specific target molecules. The main objective of this work is the development of new nanofibrous membranes with affinity and performance to remove patulin from apple juice during its processing. The strategy implemented to reach the proposed objective combines molecular imprinting and electrospinning processes. The main polymer poly(ethylene terephthalate) (PET) was blended with chitosan (Chi) and polyallylamine (PAA) to constitute the base of electrospun membranes. The patulin analogs, 6-hydroxynicotinic acid and 5-indanol, were used as template molecules for molecular imprinting and thereby enhance retention capacity of the non-woven electrospun fibrous membranes. The clean-up of patulin analogs reached retention levels of 10 % by PET-Chi membranes and 80 % by PET-PAA membranes. Furthermore, the PET-Chi membranes demonstrated high stability and improved mechanical properties when compared with those of PET alone and good performance as a filter for juice clarification.
O presente estudo propõe o desenvolvimento de membranas nanofibrosas com elevada afinidade e seletividade para a retenção de micotoxinas durante o processo de clarificação do sumo de maçã. Através de electrofiação obtém-se nanomateriais bi- e tridimensionais com alto rácio superfície-volume, elevada porosidade e interconectividade, características que potenciam a aplicação destes materiais em inúmeras áreas incluindo em processos de separação. Outra metodologia aplicada neste estudo foi a impressão molecular. Esta técnica permite a criação de cavidades molecularmente impressas a partir da interação entre a molécula molde e o monómero ou polímero funcional para a ligação especifica de determinada molécula alvo. O principal objectivo deste trabalho é o desenvolvimento de novas membranas com afinidade e performance para a remoção da patulina durante o processamento do sumo de maçã. As estratégias implementadas para alcançar este propósito combinam os dois processos anteriores: electrofiação e impressão molecular. O polímero poli(etileno tereftalato) (PET) serviu de base para a formação da membrana fibrosa por electrofiação, na qual foram incorporados outros polímeros como a quitosana (Q) e a polialilamina (PAA). Por sua vez, os análogos da patulina - ácido 6- hidroxinicotinico e 5-indanol - foram usados como moléculas molde para a impressão molecular de modo a aumentar a capacidade de retenção das membranas nanofibrosas. Deste modo, foram alcançados níveis de retenção dos análogos da patulina de 10 % para as membranas PET/quitosana e de 80 % para as membranas PET/PAA. Para além disso, as membranas PET/quitosana demonstraram elevada estabilidade com melhoria das propriedades mecânicas face à membrana de PET e também apresentaram boa performance como filtro para a clarificação do sumo de maçã.

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Conley, Keats. "Mechanics and Selectivity of Filtration by Tunicates". Thesis, University of Oregon, 2018. http://hdl.handle.net/1794/23121.

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The preferential grazing of an organism on certain particles from the environment (selective feeding) impacts particle compositions and distributions in aquatic systems. Historically, selective feeding has been examined almost exclusively through the lens of particle size. In this dissertation, I investigated size-based selection alongside particle shape, adhesive interactions, and the mechanical operation of the filter to characterize the selective-feeding capabilities of marine mucous-mesh filter-feeders (the planktonic appendicularian Oikopleura dioica and the benthic ascidians Herdmania momus and Styela plicata). I used high-speed videography to describe the feeding-filter mechanics of O. dioica and tested its capacity for size-based particle selection. I show for the first time how pulsatile flow coupled with elasticity of the filter facilitates prey detachment. Using synthetic beads, I showthat the food-concentrating filter selectively retains smaller particles because of their increased adhesion. Appendicularian houses may therefore retain particles size-selectively, which counters the historically-held assumption that appendicularians are non-selective grazers. I synthesized ellipsoidal microbeads to test the effect of particle length-to-width ratios on the capture efficiency of O. dioica and S. plicata. Both grazers retained ellipsoidal particles according to their minimum diameter. I identified the kinematic mechanism for retention patterns of ellipsoidal particles using high-speed videography and endoscopy of particle interactions with the mucous filters of O. dioica and H. momus, respectively. In the filters of both animals, ellipsoids oriented parallel to fluid streamlines and the minimum dimension of the particle intercepted the filters. I provide the first mesh-scale observations of particle capture by H. momus, show how particle shape influences hydrosol filtration by S. plicata, and suggest that ascidian filtration may not be adequately described by simple sieving.

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Moroi, Morgan K. "Antibody-modified conduits for extracorporeal selective cytokine filtration in sepsis". Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/105687.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 37-39).
Sepsis kills millions of people worldwide each year and occurs when microorganisms enter the bloodstream of an infected host. The presence of microorganisms in the bloodstream triggers the body to produce many inflammatory proteins, known as cytokines, that cause damage to blood vessels and vital organs. This leads to capillary leak, failing organs, and often death. We have developed a novel approach to modulate the inflammatory response, using antibody-modified conduits (AMCs) to filter harmful cytokines selectively from the circulation and in a time-specific manner. Here, we characterize variables that affect AMC performance to determine optimal AMC conditions for later use downstream.
by Morgan K. Moroi.
S.B.

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Mundy, Lauren Nicole. "Characterization of gravitational filtration to enrich selective equine bone marrow elements". The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406675577.

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Chateauneuf-Randon, Sixtine de. "Membranes d'hydrogel pour une filtration sélective". Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS255.

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Les hydrogels sont des matériaux polymères hydrophiles qui retiennent de grandes quantités d’eau tout en conservant une structure tridimensionnelle, ce qui les rend adaptés à des applications biomédicales et de filtration. Ce manuscrit se concentre sur les membranes d’hydrogels fabriquées à partir de polyéthylène glycol diacrylate (PEGDA) réticulé par UV en présence de chaînes de polyéthylène glycol (PEG) et d’un photoamorceur. Les membranes PEGDA/PEG sont sélectionnées pour leur robustesse mécanique et leur perméabilité élevée qui peut être ajustée en fonction de la concentration et de la masse molaire du PEG. Une caractéristique importante de ces membranes est que les chaînes de PEG restent piégées dans la matrice, permettant ainsi de les fonctionnaliser pour une filtration sélective. Notre étude montre que les membranes PEGDA/PEG peuvent retenir sélectivement de petites molécules formant des liaisons hydrogène. Nous fonctionnalisons également les membranes avec de l’acide polyacrylique (PAA) pour les rendre sélectives aux colorants chargés positivement. Les membranes PEGDA/PEG/PAA s’avèrent efficaces pour la rétention du bleu de méthylène et de la rhoda- mine B. La sélectivité de ces membranes est réversible par ajustement du pH, permettant ainsi de les rincer et de les réutiliser. L’analyse structurelle des membranes par diffusion de neutrons aux petits angles (SANS) révèle que les chaînes de PEG conservent une structure gaussienne dans la matrice de PEGDA, mais avec des rayons de giration et des longueurs de corrélation plus élevés qu’en solution, suggérant des contraintes topologiques comme des greffages chimiques ou des enchevêtrements. Une observation clé est que le rapport surface/volume de la matrice de PEGDA diminue avec l’ajout de PEG, indiquant la formation de cavités plus grandes, ce qui explique l’augmentation de la perméabilité observée. Lorsque la concentration en PEG dépasse une certaine valeur critique (C∗), le rapport surface/volume augmente, suggérant une diminution de la taille des cavités d’eau et, par conséquent, de la perméabilité. Nous développons également un modèle théorique pour prédire la perméabilité des hydrogels PEGDA/PEG en fonction de la masse molaire et de la concentration en PEG pour C < C∗, qui correspond bien aux mesures expérimentales
Hydrogels are hydrophilic polymer materials that retain large amounts of water while maintaining a three- dimensional structure, making them suitable for biomedical and filtration applications. This manuscript focuses on hydrogel membranes made from polyethylene glycol diacrylate (PEGDA) crosslinked by UV in the presence of polyethylene glycol (PEG) chains and a photoinitiator. PEGDA/PEG membranes are selected for their me- chanical robustness and high permeability, which can be adjusted based on the concentration and molecular weight of PEG. An important feature of these membranes is that the PEG chains remain trapped in the ma- trix, allowing them to be functionalized for selective filtration. Our study shows that PEGDA/PEG membranes can selectively retain small molecules forming hydrogen bonds. We also functionalize the membranes with polyacrylic acid (PAA) to make them selective for positively charged dyes. PEGDA/PEG/PAA membranes prove effective in retaining methylene blue and rhodamine B. The selectivity of these membranes is reversible by adjusting the pH, allowing them to be rinsed and reused. Structural analysis of the membranes by small- angle neutron scattering (SANS) reveals that the PEG chains maintain a local gaussian structure within the PEGDA matrix, but with larger radii of gyration and correlation lengths than in solution, suggesting topolo- gical constraints such as chemical grafting or entanglements. A key observation is that the surface-to-volume ratio of the PEGDA matrix decreases with the addition of PEG, indicating the formation of larger cavities, which explains the observed increase in permeability. When the PEG concentration exceeds a certain critical value (C∗), the surface-to-volume ratio increases, suggesting a decrease in the size of the water cavities and consequently in permeability. We also develop a theoretical model to predict the permeability of PEGDA/PEG hydrogels as a function of the molecular weight and concentration of PEG for C < C∗, which corresponds well with experimental measurements

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Ho, Wing-yuen, i 何永源. "Selective plasma filtration as a liver support system for patients with fulminant hepatic failure". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B29892739.

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The Best MPhil Thesis in the Faculties of Dentistry, Engineering, Medicine and Science (University of Hong Kong), Li Ka Shing Prize,2003-2005
published_or_final_version
abstract
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Surgery
Master
Master of Philosophy

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Morgan, Jacqueline Susan. "Reactions of metal complexes with Lewis bases and their utilisation in the selective filtration of smoke". Thesis, London Metropolitan University, 1985. http://repository.londonmet.ac.uk/3449/.

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This thesis is concerned with internal redox reactions of metal complexes and the application of such reactions in the selective filtration of tobacco smoke. The reactions of Fe(II), Fe(III) and Cu(II) quinoneoximic complexes and of some other complexes of these metals with Lewis bases (e.g. Ph3P and py) have been investigated. From the results obtained and from a critical consideration of analogous reactions reported in the literature the behaviour of metal chelates towards Lewis bases has been assessed. It has been established that the reaction between a metal chelate and a Lewis base may lead to: (i) Adduct formation, (ii) condensation and (iii) to an internal redox reaction, M(chel)n LB[over arrow] M(chel)n-1(LB)x + chel* The latter is favoured when the metal in M(chel)n has a stable lower oxidation state, by Lewis bases capable of E[eta]—bonding and by chelating ligands exerting a strong ligand field. The type of behaviour shown by chel* has been considered. The dissociated radical may: (i) Abstract a hydrogen atom to give the protonated ligand, (ii) dimerise, (iii) undergo coupling or degradation. A detailed investigation of the reactions of Fe(l-nqo)3 and Fe(2-nqo)3 with Ph3P (including kinetic studies) showed that these complexes undergo internal redox reactions to give iron(II) complexes and products arising from the deoxygenation of the nqo* radical. Mechanisms for these resctions have been proposed. The behaviour of quinoneoximic complexes of iron towards the Lewis base CO has been examined both directly and indirectly by studying the behaviour of nqoH towards Fe(CO)5 or Fe(CO)5/PhNH2. Fe(CO)5 and 1-nqoH or 2-nqoH afforded complexes of the type Fe(nqo)2, without formation of CO adducts or deoxygenation products. In the presence of PhNH2 complexes of type Fe(nqo)2 and Fe(nqo-A)2 resulted, where nqo-A is a species arising from the coupling of the nqo ligand with PhNH2. Both systems also afforded various organic products. On the basis of Mossbauer and other techniques oligomeric structures have been suggested for the complexes Fe(nqo)2 and Fe(nqo-A)2. Whereas CO did not react with Fe(nqo)2 or Fe(nqo)2.2py, it reacted with Fe(nqo)3, possibly via an internal redox process. For Fe(2-nqo)3 products arising from a deoxygenated ligand and a complex tentatively formulated as the nitrene species, Fe(2-nq)2, were isolated. The reactivity of the Fe(nqo), complexes towards CO has been successfully utilised in the selective filtration of tobacco smoke. Both Fe(1-nqo)3, and Fe(2-nqo)3 were shown to be capable of significantly reducing the level of CO in tobacco smoke under smoking conditions when supported on suitable filters. Reduction of the levels of other Lewis bases in tobacco smoke, e.g. nicotine and furfural, was observed. The complexes Fe(nqo)2, Fe(nqo)2.2py and Fe(nqo)3 reacted readily with NO to give complicated mixtures, but their effectiveness in removing NO from tobacco smoke has not been unambiguously established.

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Hansson, Jonas. "Microfluidic blood sample preparation for rapid sepsis diagnostics". Licentiate thesis, KTH, Cellens fysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96313.

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Sepsis, commonly referred to as blood poisoning, is a serious medical condition characterized by a whole-body inflammatory state caused by microbial infection. Rapid treatment is crucial, however, traditional culture-based diagnostics usually takes 2-5 days. The overall aim of the thesis is to develop microfluidic based sample preparation strategies, capable of isolating bacteria from whole blood for rapid sepsis diagnostics. Although emerging technologies, such as microfluidics and “lab-on-a-chip” (LOC) devices have the potential to spur the development of protocols and affordable instruments, most often sample preparation is performed manually with procedures that involve handling steps prone to introducing artifacts, require skilled technicians and well-equipped, expensive laboratories. Here, we propose the development of methods for fast and efficient sample preparation that can isolate bacteria from whole blood by using microfluidic techniques with potential to be incorporated in LOC systems. We have developed two means for high throughput bacteria isolation: size based sorting and selective lysis of blood cells. To process the large blood samples needed in sepsis diagnostics, we introduce novel manufacturing techniques that enable scalable parallelization for increased throughput in miniaturized devices. The novel manufacturing technique uses a flexible transfer carrier sheet, water-dissolvable release material, poly(vinyl alcohol), and a controlled polymerization inhibitor to enable highly complex polydimethylsiloxane (PDMS) structures containing thin membranes and 3D fluidic networks. The size based sorting utilizes inertial microfluidics, a novel particles focusing method that operates at extremely high flow rates. Inertial focusing in flow through a single inlet and two outlet, scalable parallel channel devices, was demonstrated with filtration efficiency of >95% and a flowrate of 3.2 mL/min. Finally, we have developed a novel microfluidic based sample preparation strategy to continuously isolate bacteria from whole blood for downstream analysis. The method takes advantage of the fact that bacteria cells have a rigid cell wall protecting the cell, while blood cells are much more susceptible to chemical lysis. Whole blood is continuously mixed with saponin for primary lysis, followed by osmotic shock in water. We obtained complete lysis of all blood cells, while more than 80% of the bacteria were readily recovered for downstream processing. Altogether, we have provided new bacteria isolation methods, and improved the manufacturing techniques and microfluidic components that, combined offer the potential for affordable and effective sample preparation for subsequent pathogen identification, all in an automated LOC format.
QC 20120611

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Sirový, Martin. "Snižování oxidů dusíku z proudu spalin na speciálních filtračních materiálech". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230898.

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This thesis deals with the reduction of oxides of nitrogen (NOx) which are part of the exhaust gas combustion devices. The focus is on reduction of NOx by selective catalytic reduction (SCR) and catalyst filtration. The first part of this work deals with the formation of NOx, their hazards and related legislation. The following is an overview of the available technologies to reduce NOx in the flue gas and comparison of this methods. The following section describes the experimental catalytic filtration unit INTEQ II, where the first real experiment selective catalytic reduction of NOx with ammonia was realized. We have verified the operability of the experimental units and achieve up to 80% efficiency SCR. The final section describes the progress of the experiment and its results. It is recommended a few minor adjustments to improve stabile operation of unit INTEQ II.

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Benedikt, Annemarie. "Herstellung nicht-hierarchischer und hierarchischer, poröser Polymermembranen mittels selektiv benetzter Oberflächen und partikelassistierter Benetzung". Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-119783.

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Gegenstand dieser Arbeit ist die Herstellung nicht hierarchischer und hierarchischer, poröser Polymermembranen mittels eines Templatverfahrens. Bei der Herstellung der hierarchischen Membranen wird eine Stützschicht mit mikrometergroßen Mulden und eine aktive Membranschicht mit submikrometergroßen Poren in einem Arbeitsschritt und aus einem Material erzeugt. Als Template für die Poren der nicht hierarchischen Membranen bzw. Mulden der hierarchischen Membran in der Stützschicht dienen Flüssigkeitstropfen. Diese werden auf Substraten mit Bereichen unterschiedlicher Benetzbarkeit erzeugt. Die Substrate werden anschließend mit einer Polymerlösung überschichtet, welche im Falle der hierarchischen Membranen sphärische, monodisperse Siliziumdioxidpartikel enthält. Die Siliziumdioxidpartikel ordnen sich bevorzugt in der Grenzfläche zwischen den Templattropfen und der Polymerlösung an. Nach Verdunsten des Lösungsmittels, Entfernen des Substrats und ggf. der Siliziumdioxidpartikel werden poröse Polymermembranen erhalten. Die nicht hierarchischen weisen Poren in der Größe der Templattropfen aus. Die hierarchischen Membranen zeigen dagegen eine Stützstruktur mit mikrometergroßen Mulden, entstanden durch die Templattropfen und eine Schicht auf der Oberseite der Membran mit submikrometergroßen Poren, die durch die Siliziumdioxidpartikel gebildet wurden. Außerdem wird gezeigt, wie das dargelegte Verfahren auf die Herstellung von Membranen aus dem Monomer VISIOMER HEMA-TMDI übertragen werden konnte

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Książki na temat "Selective filtration"

McClurg, Karin Rosemary. The use of selective media and a filtration technique for the isolation of campylobacter species. [S.l: The Author], 1993.

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Wakeman, Richard J. Filtration: Equipment selection, modelling and process simulation. Oxford, UK: Elsevier Advanced Technology, 1999.

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Merlo, Christina A. Membrane filtration handbook/selection guide: A guide on membrane filtration technology for the food processing industry. Dublin, CA: National Food Processors Association, 1993.

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J, Wakeman Richard, i Institution of Chemical Engineers (Great Britain), red. Solid/liquid separation: Equipment selection and process design. Amsterdam: Butterworth-Heinemann, 2007.

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McKenna, J. D. Fabric filter-- baghouses I: Theory, design, and selection : (a reference text). Roanoke, Va: ETS, 1989.

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Azubuike, John. Selective filtration through electrolysis: Cell media applications of electrified carbon nanotubes in cell sterilization. 2014.

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Morgan, Jacqueline Susan. Reactions of metal complexes with Lewis bases and their utilisation in the selective filtration of smoke. 1985.

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Wakeman, R. J., i Steve Tarleton. Filtration - Equipment Selection Modelling and Process. Elsevier Science, 1998.

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Tarleton, Steve, i Richard Wakeman. Solid/Liquid Separation: Equipment Selection and Process Design. Elsevier Science, 2006.

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Dentel, Steven K. Procedures Manual for Selection of Coagulant, Filtration and Sludge Conditioning AIDS in Water Treatment/90515. Amer Water Works Assn, 1986.

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Części książek na temat "Selective filtration"

Crosta, Giovanni B. "Filtration". W Selective Neck Dissection for Oral Cancer, 1–2. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-12127-7_125-1.

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Werzner, Eric, Miguel A. A. Mendes, Cornelius Demuth, Dimosthenis Trimis i Subhashis Ray. "Simulation of Fluid Flow, Heat Transfer and Particle Transport Inside Open-Cell Foam Filters for Metal Melt Filtration". W Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 301–33. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_13.

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AbstractIn order to develop improved filters for metal melt filtration, different physical phenomena that take place during depth filtration of liquid metals need to be well understood. Due to the difficult accessibility of the process, the harsh process conditions and the randomness of the typically employed ceramic foam filters, representative experimental investigations are extremely difficult to perform and often provide only integral quantities or selective information. This chapter presents a numerical model for simulating the depth filtration of liquid metal at the pore-scale, i.e., fully resolving the complex filter geometry, which can also accurately handle the curved filter walls. In the model, the velocity and pressure distribution of the melt flow is obtained by the lattice-Boltzmann method and the temperature field is calculated using the finite volume method, while the transport and filtration of the inclusions are predicted by solving the equation of motion for particles in a Lagrangian reference frame. In order to obtain a consistent representation of the curved filter walls for both particle transport and fluid flow, the Euclidean distance field of the filter structures is employed. By comprehensive parametric studies, the sensitivity of the filtration process with respect to various geometric parameters and process conditions is investigated. Therefore, geometries of conventionally manufactured filters, acquired from 3D μCT scanning, as well as computer-generated filter structures are considered. Their performance is assessed by evaluating various effective properties, such as the viscous and inertial permeability and the filtration coefficient. The numerical predictions allow to draw conclusions with respect to the dominant physical mechanisms and are compared with those from simplified physical models, which are shown to be sufficiently accurate for the pre-screening of filters. On the basis of the detailed results, suggestions for improved filter geometries are made, depending on the considered filtration process. Further, simplified models for the prediction of the effective thermal conductivity of open-cell foams in presence and absence of radiation are presented and validated using the detailed numerical predictions.

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Schoß, Johannes Paul, Andreas Keßler, Claudia Dommaschk, Michal Szucki i Gotthard Wolf. "Precipitation of Iron-Containing Intermetallic Phases from Aluminum Alloys by Metal Melt Filtration". W Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 787–813. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_31.

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AbstractIron (Fe) provides a non-reactive dissolved impurity in aluminum (Al) alloys, which forms a coarse, plate-shaped intermetallic β-phase during solidification. This β-phase is detrimental to the mechanical and casting properties. Therefore, the reduction of Fe by binding in Fe-containing intermetal-lics (sludge phase) was realized via a two-stage procedure, which consisted of conditioning of the melt by manganese (Mn) and chromium (Cr) with subsequent-ly applied metal melt filtration. For this purpose, the formation characteristics of the Fe-rich intermetallic phases were investigated regarding the temperature, time, and initial chemical composition to separate these intermetallics from the residual melt. To evaluate the different process parameters of Fe removal for a potential implementation in lightweight metal foundries, a process technology on an indus-trial scale was developed in cooperation with an industrial partner. The examina-tion of samples in optical microscopy (OM) using image analysis were conducted to determine the area fractions of Fe-rich intermetallics. In addition, optical emis-sion spectrometer (OES) measurements were performed. Complementary investi-gations were achieved by scanning electron microscopy (SEM), with energy dis-persive spectroscopy (EDS), and electron backscatter diffraction (EBSD) to measure the partial chemical composition and for phase identification. The for-mation characteristics of the Fe-containing phases were investigated using DSC cooling curves and selective sampling in quenching experiments. In the experi-mental trials, a maximum reduction of iron of ≈50% was revealed compared to the unfiltered sample, whereby greater influence on the formation of α-intermetallics was inferred by temperature than by time. Moreover, the elements Mn and Cr were reduced by about 66% and 86% at 620 °C, respectively, thus, the element contents in the filtered samples approached the chemical composition of the standard alloy (EN-AC-AlSi9Cu3(Fe)).

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Wetzig, Tony, Matthias Schwarz, Leandro Schöttler, Patrick Gehre i Christos G. Aneziris. "Functionalized Feeders, Hollowware, Spider Bricks and Starter Casting Tubes for Increasing the Purity in Steel Casting Processes". W Multifunctional Ceramic Filter Systems for Metal Melt Filtration, 815–31. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_32.

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AbstractAlthough continuous casting became the state of the art for the casting of ordinary steel grades, ingot casting by bottom teeming still has relevance in the steelmaking industry, especially for the manufacturing of specialty and alloy steels. As for every casting process, the ever-increasing quality requirements by customers lead to increased demand for new technologies to increase the purity of the cast steel melt regarding its inclusion content. Due to the special design of the bottom-teeming ingot casting facility and the discontinuous operation as batch process, the application of filters is a promising approach. Tailored foam geometries were prepared based on additive manufacturing via selective laser sintering (SLS) and transformed into filters via modified replication techniques and flame spraying. Additionally to filter application, the functionalization and quality improvement of applied hollowware refractories has high potential to remove existing inclusions from the steel melt and avoid the formation of new inclusions during casting. The investigated hollowware components were manufactured by pressure slip casting on the basis of coarse-grained alumina compositions and subsequent functionalization by spray coating based on carbon-bonded alumina slurries. Simultaneous application of functionalized, “reactive” refractory components and flame-sprayed, “active” filters enables a combined filtration system which unites the advantages of the distinct filtration mechanisms. In the continuous casting of specialty steels, the conditions are more severe resulting in additional challenges regarding the application of filters. An approach investigated in this subproject is the use of extruded filter starter casting tubes above the tundish outlet. To achieve this, extrusion mixes based on cellulose derivatives and materials of the system Al2O3-ZrO2-C (AZC) were investigated for their suitability. The new concepts were tested in industrial casting trials in cooperation with the company Deutsche Edelstahlwerke Specialty Steels Europe GmbH (DEW). Post-mortem, the former melt-refractory interface of the applied components was investigated and steel samples from the ladle, the gating system and the ingot were analyzed in comparison to untreated samples.

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Vörös, Lajos, Imre Oldal, Mátyás Présing i Katalin V.-Balogh. "Size-selective filtration and taxon-specific digestion of plankton algae by silver carp (Hypophthalmichthys molitrix Val.)". W Shallow Lakes ’95, 223–28. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5648-6_24.

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Levitt, M. H., C. Radloff i R. R. Ernst. "Simplification of 2D Spectra by (a) Topology-Selective Multiple-Quantum Filtration or (b) by Bilinear Mixing". W Advanced Magnetic Resonance Techniques in Systems of High Molecular Complexity, 49–52. Boston, MA: Birkhäuser Boston, 1986. http://dx.doi.org/10.1007/978-1-4615-8521-3_3.

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Akers, James A. "Microbiological Considerations in the Selection and Validation of Filter Sterilization". W Filtration and Purification in the Biopharmaceutical Industry, 131–40. Third edition. | Boca Raton, Florida : CRC Press, 2019. | Series: Drugs and the pharmaceutical sciences: CRC Press, 2019. http://dx.doi.org/10.1201/9781315164953-6.

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Khojayev, R., R. Gabaidullin, S. Asainov i I. Filatov. "Modeling Permeability Filtration in Outburst Zones". W Proceedings of the 27th International Symposium on Mine Planning and Equipment Selection - MPES 2018, 439–45. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-99220-4_36.

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Joshi, Vivek, i Elena Chernokalskaya. "Filtration as a Sample Preparation Technique Prior to Mass Spectrometry: Selecting the Right Filtration Device". W Sample Preparation in Biological Mass Spectrometry, 61–75. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0828-0_4.

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Gao, Xitian, Xiaojing He, Baoquan Li i Wuxi Shi. "Visual-Inertial Odometry by Point and Line Features Under Filtration and Selection". W Proceedings of 2022 International Conference on Autonomous Unmanned Systems (ICAUS 2022), 2286–300. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-0479-2_213.

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Streszczenia konferencji na temat "Selective filtration"

Veeraswamy, Ammisetty, i Ammisetty Mahesh Babu. "Expression of Concern for: Classification of High Dimensional Data Using Filtration Attribute Evaluation Feature Selection Method of Data mining". W 2019 4th International Conference on Electrical, Electronics, Communication, Computer Technologies and Optimization Techniques (ICEECCOT), 1. IEEE, 2019. http://dx.doi.org/10.1109/iceeccot46775.2019.10702746.

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Jianhong, Yao, i Liu Jicheng. "Research on Spatially Selective Noise Filtration Based Wavelet Transform". W 2010 International Conference on Intelligent Computation Technology and Automation (ICICTA). IEEE, 2010. http://dx.doi.org/10.1109/icicta.2010.389.

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Fiechtner, Gregory J., Andrew J. Skulan, Louise M. Barrett, Anup K. Singh, Eric B. Cummings i Blake A. Simmons. "Continuous Particle Filtration and Concentration by Multigradient Dielectrophoresis". W ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60888.

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A novel methodology for designing selective particle concentrators in electrokinetic flows is presented. The technique is based on two-level etching of channels to produce ridges along which field gradients are patterned. The field gradients are then used to deflect particles using dielectrophoresis. Using uniform-field designs as a basis, fields in the vicinity of a single ridge are examined both experimentally and numerically. Although isotropic etching causes local deviations from piecewise continuous fields, ridges are found to serve as selective particle deflectors in experiments with both polystyrene beads and Bacillus subtilis. Sequences of parallel ridges are also tested, illustrating the efficacy of corrugated ridge structures for selective particle concentration.

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Tabuchi, Ayumu, Kensuke Yabuuchi, Yoshiki Sahara, Minoru Takasato, Kazuya Fujimoto i Ryuji Yokokawa. "Comparison of Selective Filtration of On-Chip Glomerulus Comprised of Organoid-Derived and Immortalized Podocytes". W 2023 IEEE 36th International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2023. http://dx.doi.org/10.1109/mems49605.2023.10052159.

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Kumar, Deepan Kishore, Adarsh Venkataraman Ganesan, Sundaram Swaminathan, Niti Nipun Sharma i Ravi Kant Mittal. "A Novel MEMS Device for Selective Surface Adsorption of Lead (II) Ions From Blood Using Carbon Aerogel". W ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66306.

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In this paper, we propose to design, simulate and fabricate a novel device design that would be capable of removing heavy metal ions like Lead or Arsenic from the Blood serum. The basic design of the device comprises of micro-needles at the inlet and the outlet, followed by a micro-channel where is blood is made to flow through a series of alternating constrictions. Every constriction has a coating of Carbon Aerogel to remove the Heavy metal ions like Pb. The design also eliminates the need for a valve or a micro pump as we ensure unidirectional flow by having fewer needles at the outlet as compared to the inlet and be placed in two regions of differential pressure. The present device (with surface dimensions of 100 × 150 × 75 microns) allows for blood filtration at the rate of 62.55 ml per week. Since the device has a slow filtration rate, multiple such Point-of Care device would be worn by the affected patients.

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Tychkov, Vladimir, Ruslana Trembovetskaya, Tatyana Kisil i Yulia Bondarenko. "Using Ion-selective Electrodes in Environmental Monitoring". W Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.052.

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Environmental monitoring is an integral part of environmental protection. Control of hazardous substances wastewater occurs both in the laboratory and on-site sampling. The paper provides a method of injection analysis, which is used in data-measuring systems control the parameters of chemical and technological processes using flow-injection method. The method involves sequential injection analysis of the liquid sample supply for the hydraulic lines in the flow measuring channel slot detector. The detector is equipped with two solid-state heterogeneous ion-selective electrodes. Before measuring the detector further comprising sample preparation and filtration of samples. The estimation of the uncertainty of the measuring system with the use of ion-selective electrodes one of which performs the function of the measuring electrode, while the second an auxiliary. The ultrasonic sample preparation technique, which reduces the impact of uncertainty on the stage of sampling and preparation of samples for analysis is designed. The use of ultrasonic sample preparation directly into the stream allowed expanding the use of flow-injection analysis and reducing the time to control the quality of the process water.

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Zhang, Yue, i Shuai Yu. "Method of Non-invasive Fetal Electrocardiogram Denoising Based on Stationary Wavelet Transform and Spatially Selective Noise Filtration". W BIBE2020: The Fourth International Conference on Biological Information and Biomedical Engineering. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3403782.3403801.

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Polito, Aure´lie. "Waste Treatment by Selective Mineral Ion Exchanger". W The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7340.

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STMI, subsidiary company of the AREVA Group with over 40 years in the D&D business, has been continuously innovating and developing new decontamination techniques, with the objectives of achieving more efficient decontaminations on a growing spectrum of media. In the field of liquid waste treatment, STMI manufactures uses and commercialises selective inorganic ion exchangers (RAN). These are hydrated synthetic inorganic compounds prepared from very pure raw materials. Different types of RANs (POLYAN, OXTAIN, Fe-Cu, Fe-CoK, Si-Fe-CoK) can be used to trap a large number of radioactive elements in contaminated effluents. Different implementations could be applied depending on technical conditions. STMI’s offers consist in building global solution and preliminary design of installation either in dispersed form (batch) or in column (cartridge filtration). Those products are used all over the world not only in the nuclear business (Canada, US, Belgium, France…) but also in other fields. Indeed, it provides competitive solutions to many domains of application especially water pollution control, liquid waste treatment in the nuclear business by decreasing the activity level of waste. The following paper will focus on the theoretical principle of the mineral exchanger, its implementation and the feed back collected by STMI.

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Hambsch, Joerg, Veronika Schlykow, Jozsef Bocsi, Peter Schneider, Michal Pipek i Attila Tarnok. "Detection of leukocyte filtration and potential selective migration during use of cardiopulmonary bypass in cardiac surgery by flow cytometry". W BiOS '99 International Biomedical Optics Symposium, redaktorzy Daniel L. Farkas, Robert C. Leif i Bruce J. Tromberg. SPIE, 1999. http://dx.doi.org/10.1117/12.349200.

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Ragaller, Paul A., Alexander Sappok, Jie Qiao, Xiaojin Liu i Jonathan Aguilar. "Direct Simultaneous Measurement of Particulate Matter and Ammonia Storage on Combined Selective Catalytic Reduction Filter Systems Using Radio Frequency Sensors". W ASME 2018 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icef2018-9528.

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Tightening global emissions regulations are motivating interest in the development and implementation of Selective Catalytic Reduction + Filtration (SCRF) systems, which are designed to reduce the concentration of tailpipe particulate matter (PM) and NOx emissions. These systems allow designers to combine the NOx reduction capability of an SCR with the filtration capability of a particulate filter on a single unit. Practical implementation of these systems requires reliable measurement and diagnosis of their state — both with respect to trapped particulate matter as well as adsorbed ammonia. Currently, these systems rely on a variety of gas sensors, mounted upstream or downstream of the system, that only provide an indirect inference of the operation state. In this study, a single radio frequency (RF) sensor was used to perform simultaneous measurements of soot loading and ammonia inventory on an SCRF. Several SCRF core samples were tested at varying soot and ash loads in a catalyst reactor bench. Soot levels were measured by monitoring changes in the bulk dielectric properties within the catalyst using the sensor, while ammonia levels were determined by feeding selected regions of the RF spectrum into a pretrained generalized regression neural network model. Results show the RF sensor is able to directly measure the instantaneous ammonia inventory, while simultaneously providing soot loading measurements within 0.5 g/L. These results confirm that simultaneous measurements of both the PM and ammonia loading state of an SCRF are possible using a single RF sensor via analysis of specific features in the full RF spectrum. The results indicate significant potential to remove the control barriers typically associated with the implementation of advanced SCRF systems.

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Raporty organizacyjne na temat "Selective filtration"

Boonyasuppayakorn, Siwaporn, Sasiwimon Thonghong, Saran Salakij, Nattachai Srisawat, Numpon Insin i Pat Sinananpat. Selective dengue virus filtration and absorption system from plasma circulation. Peeref, czerwiec 2023. http://dx.doi.org/10.54985/peeref.2306p2189888.

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Vagins, Mark R. Selective Filtration of Gadolinium Trichloride for Use in Neutron Detection in Large Water Cherenkov Detectors. Office of Scientific and Technical Information (OSTI), kwiecień 2013. http://dx.doi.org/10.2172/1073072.

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Castillo Saldarriaga, Carlos, i Martha Gómez Álvarez. Selection of filtering agent and filter cloth to separate cells of probiotic yeast using a monophasic filter system. Corporación colombiana de investigación agropecuaria - AGROSAVIA, 2018. http://dx.doi.org/10.21930/agrosavia.poster.2018.4.

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The efficiency of separation operations is a critical point to determinate the yield and economic viability of a production process. Because of this, the selection of adequate operation parameters has become an important part in the design of a new bioprocess. [1, 2]. Due to its low cost and easily transformation to industrial scale, the cross-flow filtration had been highly studied in terms of process performances of microorganism biomass separation without being concerned about their viability. In this work, two parameters of cross-flow filtration were evaluated to separate yeast cells from fermented broth. Meyerozyma guilliermondii was the reference biology system used in the experiments [3]. First, an evaluation of the compatibility of two filtering agents over yeast cells was conducted. After the filtering agent was selected, the efficiency of separation was determined over different filter cloth on a monophasic filter system.

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