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Repeating unit of polyphthalamide. Polyphthalamide (aka.PPA, [1] High Performance Polyamide) is a subset of thermoplastic synthetic resins in the polyamide family defined as when 55% or more moles of the carboxylic acid portion of the repeating unit in the polymer chain is composed of a combination of terephthalic (TPA) and isophthalic (IPA) acids. [2]
Participatory poverty assessment (PPA) is the approach to analyzing and reducing poverty by incorporating the views of the poor. PPAs attempt to better understand the poor, to give the poor more influence over decisions that affect their lives, and to increase effectiveness of poverty reduction policies.
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Poly(phthalaldehyde), abbreviated as PPA, is a metastable stimuli-responsive polymer first synthesized in 1967. [1] It has garnered significant attention during the past couple of years due to its ease of synthesis and outstanding transient and mechanical properties. [2]
PPA Peri-papillary atrophy Pt Patient RAPD Relative afferent pupillary defect OD Right eye (oculus dexter) Ret. Retinoscopy RHyperT Right hypertropia RHypoT or RHT Right hypotropia RNFL Retinal nerve fibre layer RPE Retinal pigment epithelium RSOT Right esotropia Rx Prescription SE Spherical Equivalent: SLE Slit lamp examination SLM
A power purchase agreement (PPA), or electricity power agreement, is a long-term contract between an electricity generator and a customer, usually a utility, government or company. [1] [2] PPAs may last anywhere between 5 and 20 years, during which time the power purchaser buys energy at a pre-negotiated price.
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