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(Note that if k > 1, then this really is a "stretch"; if k < 1, it is technically a "compression", but we still call it a stretch. Also, if k = 1, then the transformation is an identity, i.e. it has no effect.) The matrix associated with a stretch by a factor k along the x-axis is given by: []
Similarly, cis-1,2-dichlorocyclohexane consists of chair conformers that are nonidentical mirror images, but the two can interconvert via the cyclohexane chair flip (~10 kcal/mol barrier). As another example, amines with three distinct substituents (R 1 R 2 R 3 N:) are also regarded as achiral molecules because their enantiomeric pyramidal ...
In chemistry, axial chirality is a special case of chirality in which a molecule contains two pairs of chemical groups in a non-planar arrangement about an axis of chirality so that the molecule is not superposable on its mirror image. [1] [2] The axis of chirality (or chiral axis) is usually determined by a chemical bond that is constrained ...
ImageJ is a Java-based image processing program developed at the National Institutes of Health and the Laboratory for Optical and Computational Instrumentation (LOCI, University of Wisconsin). [ 2 ] [ 3 ] Its first version, ImageJ 1.x, is developed in the public domain , while ImageJ2 and the related projects SciJava , ImgLib2 , and SCIFIO are ...
In particular, a symmetry element can be a mirror plane, an axis of rotation (either proper and improper), or a center of inversion. [ 1 ] [ 2 ] [ 3 ] For an object such as a molecule or a crystal , a symmetry element corresponds to a set of symmetry operations, which are the rigid transformations employing the symmetry element that leave the ...
Jessica Alba made memories in Mexico!. The Honest Company founder, 43, shared an Instagram carousel of family photos from a recent vacation. The pictures, which were taken on a beach at sunset ...
A person was arrested after attempting to climb a temporary fence near the White House this morning, according to a U.S. Secret Service spokesperson. The Secret Service said the person was ...
NFL POWER RANKINGS WEEK 17: Another close battle for No. 1 spot. 2025 NFL mock draft roundup. Order is current entering Week 17 games. 1. New York Giants. USA TODAY Sports: Shedeur Sanders, QB ...