منابع مشابه
Processes to separate enantiomers.
The provision of pure enantiomers is of increasing importance not only for the pharmaceutical industry but also for agrochemistry and biotechnology. In general, there are two rival approaches to provide pure enantiomers. The "chiral" approach is based on developing an asymmetric synthesis of just one of the enantiomers, while the "racemic" approach is based on separating mixtures of the two ena...
متن کاملMethod Development to Separate Enantiomers by Supercritical Fluid Chromatography
This Application Note demonstrates the use of the Agilent 1260 Infi nity Analytical SFC Solution for method screening for the separation of enantiomers. To enhance the 1260 Infi nity SFC Solution for method development and screening, a second thermostatted column compartment and two column selection valves were added for column selection, together with a 12-position/13-port valve for solvent se...
متن کاملShared versus separate processes for letter and digit identification.
Letters and digits, although similar in many respects, also differ in potentially significant ways. Most importantly, letters are elements of an alphabetic writing system, whereas digits are logographs. In this article, we explore whether letters and digits are identified by a single character identification process that makes no fundamental distinction between the two types of characters, or w...
متن کاملEvidence for separate perceptual reactivation and search processes during remembering.
Remembering involves the coordinated recruitment of strategic search processes and processes involved in reconstructing the content of the past experience. In the present study we used a cueing paradigm based on event-related functional magnetic resonance imaging to separate activity in the initial preparation phases of retrieval from later phases during which retrieval search ensued, and detai...
متن کاملLearning How to Separate
The main question addressed in the present work is how to find effectively a recursive function separating two sets drawn arbitrarily from a given collection of disjoint sets. In particular, it is investigated in which cases it is possible to satisfy the following additional constraints: confidence where the learner converges on all data-sequences; conservativeness where the learner abandons on...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Angewandte Chemie International Edition
سال: 2014
ISSN: 1433-7851
DOI: 10.1002/anie.201302823