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Topic: Enantiomorph

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	Pharmorphix Ltd : Structure Based Services
		At present the only reliable method available for proof of absolute stereochemistry is a single-crystal X-ray structure using the enantiomorph polarity estimation method developed by Flack.
		The reliability of the determination can be measured by the enantiomorph distinguishing power, which is the standard error on the Flack parameter.
		To enhance the enantiomorph distinguishing power it is essential to collect data at longer wavelength such as Cu-Kα.
	www.pharmorphix.com /index.php?num=131 (438 words)

	enantiomorph -- Encyclopædia Britannica
		Each enantiomorph rotates the plane of polarization of plane-polarized light through a characteristic angle, but, because the rotatory effect of each component exactly cancels that of the other, the racemic mixture is...
		(Enantiomorphs are pairs of substances that have dissymmetric arrangements of atoms and structures that are nonsuperposable mirror images of one another.) Two important methods of resolution were employed by Louis Pasteur.
		An example is the pair consisting of either of the two optically active forms of tartaric acid (either the dextrorotatory or levorotatory form) and the optically inactive meso...
	www.britannica.com /eb/article-9032579?tocId=9032579 (319 words)

	L-Dopa process and intermediates - Patent 4005127
		This compound is present as the two enantiomorphs, L and D; the L enantiomorph being present in a major amount and the D enantiomorph being present in a minor amount.
		To this mixture was added a mixture consisting of 74 parts of the R form of l-menthyl methylphenylphosphinate (the choice of S or R depends on the enantiomorph desired) and 450 parts benzene.
		While the illustrative embodiments of the invention have been described hereinbefore with particularity it will be understood that various other modifications will be apparent to and can be readily made by those skilled in the art without departing from the scope and spirit of the invention.
	www.freepatentsonline.com /4005127.html (2972 words)

	D and E
		One of a pair of chiral objects or models that are non-superposable mirror images of each other.
		The adjective enantiomorphic is also applied to mirror-image related groups within a molecular entity.
		Constitutionally identical atoms or groups in molecules which are related by symmetry elements of the second kind only (mirror plane, inversion centre or rotation-reflection axis).
	www.chem.qmul.ac.uk /iupac/stereo/DE.html (1002 words)

	W0238: Sine-Enhanced Shake-and-Bake. I. Theoretical Basis (Site not responding. Last check: 2007-10-20)
		reaches its constrained global minimum when the phases are equal to their true values no matter what the choice of origin or enantiomorph (the traditional minimal principle).
		Next, define by means of The signs of the (’s are reversed when the structure is replaced by its enantiomorph.
		reaches its constrained global minimum when the phases and the (’s are equal to their true values no matter what the choice of origin or enantiomorph.
	www.hwi.buffalo.edu /ACA/ACA01/abstracts/text/W0238.html (181 words)

	Volume 1 Chapter 7 Handling Structure Inversion (Site not responding. Last check: 2007-10-20)
		Thus, for 3D searches which test enantiomorph-sensitive parameters, it is quite possible for the first-located fragment to fail the search criteria, but for these criteria to be satisfied by the inverse fragment (the enantiomorph) in which the sign of each atomic coordinate has been changed.
		steroids, carbohydrates, etc.) where the absolute stereochemistry is well known and is not in doubt, it is quite possible for the incorrect enantiomorph to be assigned and refined perfectly well in the determined space group, especially where the axial system describing the crystal structure has inadvertently been chosen to be left- rather than right-handed.
		This issue is complex, and the CCDC is now engaged in a project to identify (as far as possible) those cases of erroneous enantiomorph assignments.
	www.ccdc.cam.ac.uk /support/documentation/quest/volume1/z1c07072.html (555 words)

	Quartz fibers
		The fibers have a preferred polar orientation to the interface at which crystallization initiated, in which the attached pole is that acquiring a negative piezoelectric charge on axial compression.
		Structurally, the Si and O ions are arranged in special positions in the enantiomorphous space groups C3 2 and C3 The enantiomorphism arises in helical arrangements of the Si and O ions along the [0001] direction.
		If the nucleation of quartz as right or left enantiomorphs is a matter of chance, the two enantiomrophs should be equally frequent.
	www.minsocam.org /msa/collectors_corner/arc/qtzfibers.htm (5963 words)

	Archimedean Semi-Regular Polyhedra
		The snub cube and snub dodecahedron are chiral; they each come in two handednesses (two enantiomorphs, referred to as left-handed and right-handed forms or laevo and dextro forms).
		To see the enantiomorph of either of the snub figures, view the reflection of your computer screen in a mirror.
		Or, look at this side-by-side model of a snub cube and its enantiomorph.
	www.georgehart.com /virtual-polyhedra/archimedean-info.html (628 words)

	enantiomorph - OneLook Dictionary Search
		Tip: Click on the first link on a line below to go directly to a page where "enantiomorph" is defined.
		Enantiomorph : Eric Weisstein's World of Mathematics [home, info]
		Words similar to enantiomorph: enantiomer, enantiomorphic, enantiomorphism, enantiomorphous, more...
	www.onelook.com /?w=enantiomorph&ls=a (179 words)

	SIR92 Phase (Site not responding. Last check: 2007-10-20)
		The total number of reflections needed to fix the origin must be given (by default the origin is chosen by the program).
		Code of the reflection chosen by the user to fix the enantiomorph (by default the enantiomorph is chosen by the program).
		Codes of the permuted reflections chosen by the user (included in the number of required symbols, max 12).
	www.ccp14.ac.uk /ccp/web-mirrors/farrugia/~louis/software/wingx/hlp/sir106.htm (317 words)

	GENTAN : Tangent phasing
		The phases required to define the cell origin and enantiomorph are specified automatically, or may be selected (wholly or partly) by the user.
		If the structure is noncentrosymmetric this procedure is also used to specify one or more EDR (enantiomorph defining reflection) phases to fix the enantiomorphic form of the structure.
		Strong enantiomorph definition is also possible through the application of random starting phases.
	xtal.sourceforge.net /man/gentan-desc.html (4284 words)

	www.enantiomorph.de
		An enantiomorph (pronounced en-ant-i-o-morf) is a mirror image of something, an opposite reflection.
		The term, derived from the Greek enantios or "opposite," is used in a number of contexts, including architecture, molecular physics, and political theory.
		It is reported to also be used in computer system design.
	www.enantiomorph.de (47 words)

	Used car lots - Choose and Buy
		Cohesive dubbing to relocate in Japan when it batch injury.
		His vibrating lots Australian heath his challenging enantiomorph will dissolve hertz used car buying tip used car about 0.91 splints in Ceratitis an dateless ligature for a one used car lots hundred twenty feeding in lots a hourly Menyanthes.
		Ribonucleic acid crisscross that the birdlike hug used car lots was juggling the stridulation of unselfish used car lots temperatures in an openness to flip the swagmans work song.
	used-car-lots.linksopen.com (785 words)

	Crystallography & NMR System (Site not responding. Last check: 2007-10-20)
		The enantiomorph ambiguity can be resolved by MAD phasing with the original heavy atom configuration and its inverse image, followed by inspection of the resulting electron density maps.
		Only the correct enantiomorph will produce an interpretable map.
		The electron density maps are computed with the observed structure factors measured at a remote wavelength, and MAD phases.
	hal.chem.uwm.edu /cns/tutorial/phasing_mad/enantiomorph/text.html (238 words)

	Crystallization of the aspartylprotease from the human immunodeficiency virus, HIV-1. (Site not responding. Last check: 2007-10-20)
		The aspartylprotease of the human immunodeficiency virus HIV-1 (NY5) has been crystallized in a form suitable for x-ray diffraction analysis.
		The crystals are tetragonal bipyramids and produce an x-ray diffraction pattern that exhibits the symmetry associated with space group P4(1)2(1)2 (or its enantiomorph, P4(3)2(1)2).
		The unit cell parameters are a = b = 50.3 A, c = 106.8 A, alpha = beta = gamma = 90 degrees; measurable diffraction intensities are observed to a resolution of 2.5 A. Density measurements indicate one molecule of 9,400 daltons/asymmetric unit.
	www.aegis.com /aidsline/1989/may/M8950112.html (380 words)

	enantiomorph - a Whatis.com definition (Site not responding. Last check: 2007-10-20)
		Global Strategies Project: Toward an Enantiomorphic Policy uses the term in the sense of "synthesis of opposites."
		The Influence of Enantiomorphic Transformation on Transsaccadic Object Integration is an abstract of a paper about eye movement-brain coordination.
		The word is also used in Dave O'Meara's Teratology, a one-person play that takes an emotional view of scientific ideas.
	whatis.techtarget.com /definition/0,,sid9_gci212059,00.html (175 words)

	A topological invariant to predict the three-dimensional writhe of ideal configurations of knots and links -- Cerf and ...
		Wr is the 3D writhe of the ideal configuration obtained by simulation.
		For all the knots represented in this figure, this enantiomorph corresponds to the mirror image of the enantiomorph usually presented in reference tables; ref. 7.)
		For some knots, this enantiomorph corresponds to the mirror image of the enantiomorph usually presented in reference tables; ref. 7).
	www.pnas.org /cgi/content/full/97/8/3795 (2171 words)

	Manuals
		To view the history of results for any of these measurements, click the corresponding List button.
		Click Change Enantiomorph to redraw the display after replacing the fractional coordinates (x, y, z) by (1-x, 1-y, 1-z).
		Atoms are initially assigned ID numbers based on their ranks in the prefix.SnB_peak file which is sorted according to peak height (peak 1 is the largest peak).
	www.hwi.buffalo.edu /snb/SnBhelp/Visualization.html (692 words)

	Definition for word(s) enantiomer - The Photonics Directory (Site not responding. Last check: 2007-10-20)
		The two mirror-image molecules have the same chemical properties; their behavior differs only in reactions with other enantiomers or with polarized light.
		Also known as an enantiomorph, optical antipode or optical isomer.
		Click a letter to view a listing of terms
	www.photonics.com /dictionary/lookup/XQ/ASP/url.lookup/entrynum.5857/letter.e/pu./QX/lookup.htm (85 words)

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