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Showing 1 to 20 of 39 for “"foamy"”.
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Foamy Virus Enzymes - Activity, Regulation and Resistance
Foamy viruses or spumaretroviruses belong to the family of retroviridae but differ in several aspects from other retroviruses (orthoretroviruses). Viral particles contain DNA not RNA. The Pol protein, the precursor of the viral enzymes, is translated from a separate mRNA independently of the capsid …
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Foamy Virus RNase H - Aktivität, Struktur und Funktion
… Das für die Replikation des RNA-Genoms von Foamy Viren (FV) notwendige Enzym, die Protease-Reverse Transkriptase (PR-RT), beinhaltet die Protease-, die Polymerase- und RNase H-Domäne. Letztere ist für den Abbau der RNA im entstehenden RNA/DNA Hybrid verantwortlich. Während die FV PR-RT als …
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Einfluss posttranslationaler Modifikationen auf die Funktion des Prototyp Foamy Virus Hüllproteins
… die Orthoretrovirinae und die Spumaretrovirinae. Foamyviren stellen aufgrund einiger besonderer Eigenschaften die einzigen Vertreter dieser Unterfamilie, die sie als Bindeglied zwischen den Retroviren und den Hepadnaviren erscheinen lassen. So erfolgt beispielsweise die reverse Transkription des …
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Experimental Study on Foamy Oil Flow by Using Different heavy Oil-Solvent Systems
Foamy oil flow that occurs in heavy oil reservoirs under solution gas drive in the primary production process, shows an anomalous production performance compared with that in conventional solution gas drive reservoirs [Maini, 2001]. Although several laboratory experimental studies have been carried …
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Genetische und funktionale Vereinfachung eines komplexen Retrovirus am Beispiel des Primaten Foamy Virus Typ 1 (PFV-1)
Foamyviren (Spumaviridae) werden neuerdings von den übrigen Retroviren (Orthoretroviridae) abgegrenzt. Durch verschiedene Besonderheiten in ihrem Replikationszyklus, wie der Möglichkeit zur intrazellulären Retrotransposition oder der reversen Transkription spät im Vermehrungszyklus, nehmen sie eine …
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Integrated optimization of hybrid steam-solvent injection in post-CHOPS reservoirs with wormhole networks and foamy oil behaviour under uncertainty
… open channels (i.e., wormholes) and induced foamy oil lead to a higher oil recovery than expected. Hybrid steam-solvent injection has been considered as the most effective recovery method for heavy oil reservoirs; however, the existence of wormhole networks makes it technically and …
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Experimental and mathematical modeling of foamy-oil evolution and flow in the primary production and CO₂-based cyclic solvent injection
… production trends: single-phase flow (Ipp), foamy-oil flow (IIpp), and foamy-oil flow + free-gas flow (IIIpp). Moreover, three possible fluid production trends were found in the early cycles of CO2-CSI: free-gas flow (ICSI), foamy-oil flow + free-gas flow (IICSI), and free-gas flow (IIICSI). …
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Characterization of Gas-Oil Flow in Cyclic Solvent Injection (CSI) for Heavy Oil Recovery
… by the dispersed gas-oil flow referred to as the foamy oil flow. The gas-oil flow in CSI eventually appears as the combined flow of free gas and foamy oil across the solvent chamber. The gas-oil flow in heavy oil systems has been widely investigated based on heavy oil solution gas drive. However, …
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Microfluidic investigation of cyclic solvent injection: from reservoir-on-the-chip to large scale
… this study examined the microscopic behaviour of foamy oil flow on microfluidic platforms, examining the mechanisms involved in bubble evolution. Based on the visualization studies conducted on the microfluidic systems, it was found that solvent type, pressure depletion rate, and reservoir …
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Nonequilibrium phase Behaviour and Mass Transfer of Alkane Solvents(s)-CO2-Heavy Oil Systems Under Reservoir Conditions
… well production rate due mainly to the foamy nature of viscous oil containing gas bubbles. Even for secondary and tertiary recovery techniques, it is possible to artificially induce foamy oil flow in heavy oil reservoirs by dissolution with injected gases (e.g., CO2 and alkane solvents), …
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Investigating permeation of anti-mycobacterial agents in Mycobacterium tuberculosis and M. tuberculosis-infected macrophages in vitro as a model for early stage tuberculosis drug discovery
… drug permeation in resting, activated and foamy macrophages; and (iii) determination of the correlation (or not) between intracellular drug concentration and effective M. tuberculosis growth inhibition. The highly lipophilic natural product, fusidic acid (FA), its known human metabolite, …
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Experimental Study on Improving the Waterflooding Potential in Different Heavy Oil-Solvent Systems
… of natural energies (such as solution gas drive, foamy oil effect, expansion effect, etc.) in heavy oil reservoirs. In previous studies, the parameters related to the pressure change, such as the injection rate, the start time of waterflooding, the voidage replacement ratio (VRR) control, etc., …
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Study on the Feasibility of Nitrogen Huff-N-Puff in Heavy Oil Reservoirs
… is to confirm the ability of nitrogen to form foamy oil and the feasibility of nitrogen Huff-n-Puff in relatively deep heavy oil reservoirs. This study includes three types of tests. The first category is the PVT tests to measure N2 solubility in heavy oil. The temperature is set from 50 to 80 …
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Struktur-Funktionsbeziehungen und Inhibition retroviraler Reverser Transkriptasen
… p66 und p51. Im Gegensatz hierzu besitzen Foamy Viren (FVs) wie das Affen Foamy Virus aus Makaken (simian foamy virus of macaques, SFVmac) eine Protease (PR)-Domäne am N-Terminus des reifen monomeren PR-RT Enzyms. Alle retroviralen RTs beinhalten eine N-terminale Polymerase- und eine …
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Investigación para sísmica 4D de las variaciones de las propiedades petrofísicas y de la viabilidad técnica en los yacimientos de crudos extrapesados espumantes
… extrapesados tienen propiedades espumantes ("foamy oils"), tal como ocurre en la mayoría de los yacimientos de la Faja Petrolífera del Orinoco y de las Arenas Petrolíferas de Alberta, si es viable aplicar Sísmica 4D. La demostración se basa en que las disminuciones de los atributos sísmicos de …
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Interactions of Mammalian Retroviruses with Cellular MicroRNA Biogenesis and Effector Pathways
… provide evidence that the spumaretrovirus bovine foamy virus expresses high levels of viral miRNAs via noncanonical biogenesis mechanisms. In contrast, the lentivirus human immunodeficiency virus type 1 (HIV-1) does not express any viral miRNAs in a number of cellular contexts. Comprehensive …
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Entwicklung einer biodegradierbaren Harnleiterschiene : In-vitro-Analytik von Poly(D,L-Lactid) als Homo- und Copolymer, Formgebungs-Technologie, Oberflächenmodifizierung und tierexperimentelle Untersuchung im Schaf-Modell
… gas-loading under high pressure which induces a foamy bulk structure. The hydrolytically biodegradable, synthetic homo- and copolymers poly(D,L-lactide) (PDLLA), poly(D,L-lactide-co-trimethylene-carbonate) (PDLLA-co-TMC), poly(D,L-lactide-co-glycolide) (PDLLA-co-Gly) as derivatives of lactic acid …
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Synthesis and Computational Studies on Hiv-1 Integrase Inhibitors
… and 3D structure determination of a complete foamy virus IN-DNA complex. To take advantage of the power of structure-based drug design, in the second part of the computational studies, homology models of HIV-1 IN-DNA were constructed based on the foamy virus IN-DNA complex X-ray crystal …
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The role of chemokines in the pathology of multiple sclerosis and other neuroinflammatory diseases
… predominantly expressing CXCR3 and CCR5, and foamy macrophages within the lesion predominantly expressing CCR3, CCR5 and CCR8. <i>In vitro</i> studies confirmed the production of chemokines and the expression of chemokine receptors by isolated rat astrocytes and microglia following cytokine …
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