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Showing 1 to 20 of 49 for “"PHAS"”.
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Παραγωγή πολυ-υδροξυαλκανεστέρων (PHAs) από καθαρές και μικτές καλλιέργειες μικροοργανισμών με χρήση συνθετικών υποστρωμάτων και υγρών αποβλήτων ελαιοτριβείου
… πολύ-υδροξυαλκανεστέρων (Poly-hydroxyalkanoates: PHAs). Περισσότερα από 300 στελέχη μικροοργανισμών έχουν χαρακτηριστεί ως προς την ικανότητα τους να συνθέτουν και να συσσωρεύουν τα πολυμερή αυτά ως αποθήκη άνθρακα και ενέργειας. Η συσσώρευση των PHAs πραγματοποιείται με την μορφή ενδοκυτταρικών …
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Public housing authorities and the challenge of developing affordable housing : the case of the Cambridge Housing Authority
… affordable housing. Public Housing Authorities (PHAs), who are the main providers of housing opportunities to this population, are limited in their capacity to develop more housing units or provide more housing choices. With the elimination of the public housing development fund, and the …
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Systematic investigation of potential factors that affect the production costs of the bio-based and bio-degradable plastic polyhydroxyalkanoates (PHAs) by a costing analysis based on early process simulation
… bio-degradable plastics, polyhydroyalkanoates (PHAs) as promising alternatives to petroleum plastics. PHAs are biologically synthesised polyesters which accumulate intracellularly in the presence of excess carbon from renewable resources and, limited nutrients in the form of nitrogen, phosphorus …
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Biosynthesis of polyhydroxyalkanoates for cardiac tissue engineering applications
… P(3HO), a medium chain length (mcl-PHAs) biodegradable, biocompatible and elastomeric polyhydroxyalkanoate, was studied as a potential material for cardiac tissue engineering. Mcl-PHAs are an alternative source of polymers produced by Pseudomonas sp. As Gram-negative bacteria, …
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The bacterial synthesis and characterisation of polyhydroxyalkanoates using waste plastics as carbon sources for novel applications
Polyhydroxyalkanoates (PHAs) are a group of biocompatible, environmentally neutral, biodegradable plastics that can be produced by bacteria. The structure of PHAs can be adapted for a wide range of applications, including biomaterials, 3D printing filaments, packaging and general household items. …
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Navigating RAD Conversions: Suggestions for Public Housing Rehabilitation
… to 75% of the more than 2500 eligible local PHAs are yet to benefit from it. This thesis examines the evolution of RAD programs, including the two newer tools, RAD/Section 18 Blend and Faircloth-to-RAD, and their adoption by public housing authorities (PHAs). The research incorporates a …
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Producción de poli(hidroxialcanoato)s (PHA)s a partir de fuentes renovables de bajo costo
… de producción. Los poli(hidroxialcanoato)s (PHAs) son una familia de biopoliésteres de origen natural sintetizados por diversos microorganismos. Las características de los PHAs pueden dar lugar a diversas propiedades adaptables a diferentes aplicaciones industriales que van desde materiales …
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Keeping the authority public : public housing preservation and organizational restructuring with the Rental Assistance Demonstration
… safety net, other public housing authorities ("PHAs") have begun to use the program to empower themselves and ensure the financial stability and health of their entire portfolios. Since the program's pilot period began in 2012 at least three typologies of RAD implementation have emerged, each …
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New directions for assisted housing mobility in America
… context, Public Housing Authorities (PHAs), rather than federal or nonprofit agencies, are taking the lead. Critically, PHAs are for the first time attempting to integrate substantial mobility supports in their TBRA programs, which comprise the largest form of federal housing aid to …
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Development of antibacterial Polyhydroxyalkanoates for their use in nerve tissue engineering
… this study utilized Polyhydroxyalkanoates (PHAs), linear bio-polyesters derived from bacterial fermentation process with biocompatible and biodegradable properties. PHAs are divided into two categories, according on the number of carbon atoms in a monomer unit: short chain length (scl) and …
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Investigating Microbial Quorum Sensing Potential for Enhanced Production of Biodegradable Polymers
… naturally biodegrade within the environment make PHAs a potential candidate to replace tradition plastics, which cause harm to our environment, our wildlife and ourselves. One of the main drawbacks associated with PHAs, is the difficulty of producing them in large quantities, which hinders their …
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System design of the MeerKAT L - band 3D radar for monitoring near earth objects
… detecting and tracking of small space debris and PHAs. The most significant challenges include: difficulty in tracking small space debris due to orbital instability and reduced radar cross-section (RCS), errors in some existing data sets, the lack of dedicated or contributing instruments in the …
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Production of Polyhydroxyalkanoates and their application for coronary stent development
… group of biomaterials Polyhydroxyalkanoates (PHAs), which are biopolyesters produced by bacteria, have a great potential in coronary stent development. They are biodegradable, non-toxic and biocompatible. PHAs have a broad range of properties, which can be tailored based on the requirements of …
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Designing Culture-Tailored Persuasive Technology to Promote Physical Activity
… shows that persuasive health applications (PHAs) are more likely to be effective if they are theory-driven and tailored to the target audience. Yet, most existing PHAs on the market are neither theory-driven nor tailored to the target audience. Rather, their designers often employ a …
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Antibiotic-free PHA-based antibacterial materials for bone regeneration
… materials based on polyhydroxyalkanoates (PHAs) for bone regeneration following two strategies. For the first strategy, inherently antibacterial PHAs, thioester containing PHAs, were produced by bacterial fermentation. Such materials exhibited antibacterial activity by contact against S. …
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Biosynthesis of polyhydroxyalkanoates, their novel blends and composites for biomedical applications
Polyhydroxyalkanoates (PHAs) are a family of polyhydroxyesters of 3-, 4-, 5- and 6- hydroxyalkanoic acids produced by bacterial fermentation in a nutrient limiting conditions with excess carbon. They can be produced easily using renewable carbon sources. They are biodegradable and biocompatible in …
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An investigation of temperature effects on denitrifying bacterial populations in a biological nutrient removal (BNR) system
… system were investigated. Next, the role which PHAs (poly-beta-hydroxyalkanoates) played in the denitrification process were examined. Finally, the effect of temperature changes on the production and consumption rates of PHAs was determined. Sacrificial batch experiments were performed to assess …
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Production of Polyhydroxyalkanoates by Pseudomonas mendocina using vegetable oils and their characterisation
Synthesis of Polyhydroxyalkanoates (PHAs) by Pseudomonas mendocina, using different vegetable oils such as, coconut oil, groundnut oil, corn oil and olive oil, as the sole carbon source was investigated for the first time. The PHA yield obtained was compared with that obtained during the production …
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Novel Polyhydroxyalkanoate blends: their characterisation and possible applications
Polyhydroxyalkanoates (PHAs) are polyesters consisting of 3-hydroxyalkanoic acids synthesised by numerous bacteria as storage compounds, in the presence of excess carbon, under nutrient limiting conditions. PHAs are biodegradable and biocompatible polymers that exhibit a variety of properties …
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Investigation of polyhydroxyalkanoate production by an activated sludge microbial consortium treating artificial dairy wastewater
… polymers, are the Polyhydroxyalkaonates (PHAs). Primary research in this area has focused on using recombinant pure cultures to optimise PHA yields, however, despite considerable success, the high costs of pure culture fermentation have thus far hindered the commercial viability of PHAs …
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