نتایج جستجو برای: kryptofix 5
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UNLABELLED An extensive series of radioligands has been developed for imaging central nicotinic acetylcholine receptors (nAChRs) with PET. Two halogeno-derivatives of A-85380 are being used in humans. Nevertheless, these derivatives still display too-slow brain kinetics and low signal-to-noise ratio. METHODS A novel nAChR radioligand, 5-(6-fluorohexyn-1-yl)-3-[2(S)-2-azetidinylmethoxy]pyridin...
Kryptofix® 2.2.2 (Kry) or tetrabutylammonium (TBA) are commonly used as phase transfer catalysts in 18F-radiopharmaceutical productions for positron emission tomography (PET). Due to their toxicity, quality control has to be performed before administration of the tracer to assure that limit concentration of residual reagent is not reached. Here, we describe the successful development and pharma...
A G-rich nucleic acid-tethered acrylamide/N-isopropylacrylamide (NIPAM) copolymer is prepared. The nucleic acid-modified pNIPAM chains assemble, in the presence of K ions, into a stimuli-responsive G-quadruplex-crosslinked pNIPAM hydrogel undergoing cyclic and reversible solution/hydrogel/solid transitions. Addition of kryptofix [2.2.2], CP, to the K-stabilized G-quadruplex-crosslinked hydrogel...
BODIPY (4,4-difluoro-4-bora-3a,4a-diaza-s-indacenes) dyes possess intense absorption profiles that can be exploited in various light harvesting applications. However, redox stability and optimization of frontier molecular orbital energies in these dyes are critical for their successful incorporation into new solar cell materials. This article describes the synthesis and characterization of a fa...
تحقیقات به عمل آمده در این پروژه شامل دو بخش است. در بخش اول، انتقال رقابتی کاتیون های ,ca+2 ,mg+2 , k+ cr+3 ,ni+2 ,co+2 وfe+3 از یک فاز آبی منبع به یک فاز آبی دریافت کننده از طریق یک فاز آلی غشایی مورد بررسی قرار گرفت. فاز منبع از یک محلول بافری شامل استیک اسید/ سدیم استات (ch3cooh/ch3coona) با 5 ph تشکیل شده بود که حاوی غلظت های یکسانی از کاتیون های مذکور بود. فاز آلی از برخی حلالهای آلی حاوی...
UNLABELLED With the recent advent of integrated PET/MR hybrid systems, the need for simultaneous PET and MR phantom measurements arises. Phantom fluids that are used in stand-alone MR systems, especially in larger phantoms and at a high magnetic field strength, are not necessarily applicable in PET imaging and vice versa. In this study, different approaches to fluid selection were considered an...
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