منابع مشابه
Hybrid Assembly Cleaning with Non-Halogenated Solvents
Because of xegulatoe, economic and community pressures, halogenated solvents, routinely used for various cleaning operations in the electronics industry, are being aggressively phased out. A fundamental undemanding of the chemical n a t u ~ of process specific contamination is essential to enable thegroper selection of appropriate alternative cleaning agents. In this study, the role and need of...
متن کاملA naphthalimide-based fluorescent sensor for halogenated solvents.
A fluorescent sensor for halogenated solvents termed AMN is reported. AMN shows strong fluorescence in most halogenated solvents (QE > 0.1) but weak fluorescence (QE<0.01) in most non-halogenated solvents. In chlorinated solvents, the fluorescence intensity decreased with the reduction of chlorine content. On the contrary, in brominated solvents the fluorescence intensity increased with the red...
متن کاملFormation of halogenated artifacts in brominated, chloraminated, and chlorinated solvents.
The formation of halogenated solvent artifacts was investigated in common analytical solvents exposed to free chlorine, chloramines, and free bromine. Three brominated solvent artifacts [3-bromo-3-methyl-2-butanol (BMB) ,l-bromc-2-methyl-2-propanol, and bromoacetone] were identified by gas chromatography/mass spectrometry in methyl tert-butyl ether or pentane exposed to free bromine. These same...
متن کاملdiagnostic and developmental potentials of dynamic assessment for writing skill
این پایان نامه بدنبال بررسی کاربرد ارزیابی مستمر در یک محیط یادگیری زبان دوم از طریق طرح چهار سوال تحقیق زیر بود: (1) درک توانایی های فراگیران زمانیکه که از طریق برآورد عملکرد مستقل آنها امکان پذیر نباشد اما در طول جلسات ارزیابی مستمر مشخص شوند; (2) امکان تقویت توانایی های فراگیران از طریق ارزیابی مستمر; (3) سودمندی ارزیابی مستمر در هدایت آموزش فردی به سمتی که به منطقه ی تقریبی رشد افراد حساس ا...
15 صفحه اولRecovery of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) from Ralstonia eutropha cultures with non-halogenated solvents.
Reduced downstream costs, together with high purity recovery of polyhydroxyalkanoate (PHA), will accelerate the commercialization of high quality PHA-based products. In this work, a process was designed for effective recovery of the copolymer poly(hydroxybutyrate-co-hydroxyhexanoate) (P(HB-co-HHx)) containing high levels of HHx (>15 mol%) from Ralstonia eutropha biomass using non-halogenated so...
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ژورنال
عنوان ژورنال: Journal of Testing and Evaluation
سال: 1989
ISSN: 0090-3973
DOI: 10.1520/jte11099j