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Topic: Chirality (chemistry)

Related Topics

Chirality

Cahn Ingold Prelog priority rules

Enantiomer

Stereochemistry

Liquid crystal

Optical activity

Circular dichroism

Carvone

Asymmetry

Group theory

Tartaric acid

Polarization

Ribozyme

Phase (matter)

	Book Review: Chirality in Drug Research - Eric Francotte, Wolfgang Lindner
		In the first section, the isolation of chiral drugs from natural sources, their production in enzymatic processes and the resolution of racemic mixtures in preparative chromatography are outlined in separate chapters.
		The book “Chirality in Drug Research” explains in detail why enantiomers should be considered as completely different drugs as a matter of principle, and provides a good and easily understood survey of the most important methods used in industry for the manufacture and analysis of drugs.
		“Chirality in Drug Research” provides its readers with a comprehensive overview of the field, and offers a simultaneous, integrated exposure to the important methods for both synthesis and analysis.
	www.organic-chemistry.org /books/reviews/3527310762.shtm (718 words)

	Panload articles for Reference & Education advice and help
		Chirality (pronounced KIE ral it tee) is the property of handedness.
		Organic Chemistry Foundational concepts of organic chemistry Atomic structure
		Organic Chemistry Foundational concepts of organic chemistry Acids and bases
	www.panload.com /list.php?id=11 (900 words)

	Describing Chirality: Research results
		The chiral objects are the objects that fail to be achiral.
		Accordingly, whilst chirality indeed plays a tremendous part in organic chemistry or biochemistry, it is not related in any particular way with chemistry or biology.
		It was mathematically proved that chirality is amenable to a rich description for a large class of objects that includes molecules.
	www.chirality.org /research.htm (0 words)

	Kalée Gregory: Chirality Module Design (Site not responding. Last check: )
		My background is chemistry, and since one of the topics that inspired me to do chemistry in the first place was chirality, I enthusiastically volunteered to design a unit on chirality for the class.
		Chirality is an intersting and important topic in chemistry, and chirality in molecules is detected with light.
		In lab, various activities on polarization, symmetry, and chirality would give the students a means for choosing a project on one of those topics to explore during the second half of the quarter.
	kalee.tock.com /portfolio/chirality.html (523 words)

	Chirality (chemistry) (Site not responding. Last check: )
		Chiral molecules are sometimes referred to as being "dissymmetric"; chirality and dissymmetry being one in the same.
		A molecule is achiral (that is, not chiral) if and only if it has an axis of improper rotation, that is, an n-fold rotation (rotation by 360Â°/n) followed by a reflection in the plane perpendicular to this axis which maps the molecule on to itself.
		Chirality is of critical importance in chemistry and unites the traditionally-defined subdisciplines of inorganic chemistry, organic chemistry and physical chemistry.
	www.guideofpills.com /Chirality_%28chemistry%29.html (1014 words)

	Chirality (chemistry) (Site not responding. Last check: )
		Chirality may also be defined in mathematical terms.
		This is the case for chiral amino acids where the alpha carbon atom is the stereogenic centre, having point chirality.
		In this case, the Ru atom may be regarded as a stereogenic centre with the complex having point chirality.
	www.pillscatalog.net /Chirality_%28chemistry%29.html (1038 words)

	Chirality (Organic chemistry) - Research Area
		Chirality (pronounced KIE-rail-it-tee) is the property of handedness.
		Chiral objects don't have a plane of symmetry.
		Other types of chiral compounds without stereocenters (like restriction of rotation of a single bond because of steric hindrance) also exist.
	www.researcharea.org /books/Chirality (0 words)

	Chirality
		A chiral molecule is one that is not superimposable on its mirror image; it has the property of rotating the plane of polarisation of plane-polarised monochromatic light that is passed through it.
		The degree of rotation of the plane of polarisation of plane-polarised monochromatic light by a chiral compound depends on the path length the light traverses, the concentration of the compound (if it is in solution), the compound itself – and the wavelength of the light.
		Cyclooctatetraene is a tub-shaped molecule; its 1,2,3,4-tetramethyl derivative is chiral.
	www.rod.beavon.clara.net /chiralit.htm (993 words)

	Encyclopedia :: encyclopedia : Environmental chemistry (Site not responding. Last check: )
		Environmental chemistry is the scientific study of the chemical and biochemical phenomena that occur in natural places.
		One of the main uses of Environmental Chemistry is the use of quantitative chemical analysis, to better understand the chemistry of natural systems or as an investigative tool by bodies such as the environment agency to identify, for instance levels of contaminants discharged by industry into water, soil or air.
		Environmental chemistry is used to identify levels of nitrate/phosphate being leached from agricultural land into water courses which can lead to algal blooms and eutrophication, this application is especially valid in nitrate vulnerable zones where agriculture can severely impact on natural systems if left unchecked.
	www.hallencyclopedia.com /topic/Environmental_chemistry.html (169 words)

	Articles / Impact / Evolution Hopes You Don't Know Chemistry: The Problem with Chirality - Institute for Creation ...
		Chirality is probably one of the best scientific evidences we have against random chance evolution and chirality totally destroys the claim that life came from chemicals.
		Chirality is a property that only a few scientists would even recognize as a problem.
		The fact that chirality was missing in those amino acids is not just a problem to be debated, it points to a catastrophic failure that "life" cannot come from chemicals by natural processes.
	www.icr.org /article/105 (1923 words)

	<chirality>
		The term “chiral” is derived from the Greek word “kheir” meaning hand, the most familiar chiral object, and designates the existence of left/right opposition.
		Almost all chiral molecules in nature are present as a single enantiomer.
		The 2001 Nobel Prize in chemistry was shared by three chemists for their discoveries in asymmetric catalysis which allows a single enantiomer to be produced synthetically.
	www.geronova.com /chirality.htm (1232 words)

	Free Chemistry Essays
		Chemistry is the science of the composition and structure of materials and of the changes that materials undergo.
		Chemistry lab report - The goal of the project was to characterize an "unknown" organic acid in order to make a proper identification of the acid, while learning proper techniques for scientific measurement and analysis of error..
		Asimov On Chemistry By Isaac Asimov - Asimov On Chemistry by Isaac Asimov.
	www.123helpme.com /search.asp?text=Chemistry (2917 words)

	Describing Chirality: Home page
		Basically, chirality is "handedness," that is the existence of left/right opposition.
		This background is to be kept in mind when appreciating the importance of chirality, whether in science or in everyday life.
		Chirality is an old theme in many branches of chemistry and biology, with overwhelming practical importance, and physicists have long paid interest in symmetry matters.
	chirality.ouvaton.org /homepage.htm (682 words)

	New Optical Probes of Chiral Molecules
		Chirality is found at all physical length scales: from interactions mediated by the weak force to the anatomy of living organisms.
		The chirality of the amino acids and sugars in turn cause proteins and DNA to be chiral (handed), and thus are often the cause for highly specific biological function.
		Circularly polarized light is clearly chiral, and so it is remarkable that the action of three linearly polarized electric fields can also be a chiral probe in a homogeneous and isotropic liquid.
	people.ccmr.cornell.edu /~fwise/pfchiral.html (747 words)

	What's New in the Novak Group
		Examples of chirality influencing biological chemistry are ubiquitous and essentially uncountable.
		These chiral helical polymers have numerous applications that include reversible molecular switches and sensors, optoelectronic components, chiral separations media, and synthetic protein mimics.
		We have synthesized a number of chiral binaphthal catalysts that can be used to polymerize carbodiimides to form polymers that adopt primarily a single screw-sense.
	www.ncsu.edu /ncsu/chemistry/novak/New_1.html (506 words)

	Origin of life: the chirality problem
		A tragic reminder of the importance of chirality is thalidomide.
		Even if modern clays did have a chiral bias, this could be due to previous absorption of optically active biomolecules (which are, of course produced by living things).
		One attempt to solve the chirality problem was proposed by Russell Doolittle, a professor of biochemistry at the University of California at San Diego, and an atheist.
	www.answersingenesis.org /tj/v12/i3/chirality.asp (2887 words)

	Open Directory - Science: Chemistry: Publications: Journals (Site not responding. Last check: )
		Chemistry World - Chemistry World is a lively and informative guide magazine to cutting edge research, international business news and government policy as it affects the chemical science community.
		Chirality - Publish scientific work on the role of molecular asymmetry in both biologically active and non-biologically active molecules in respect to their pharmacological, biological, and chemical properties.
		Education in Chemistry - Covers the whole spectrum of chemistry teaching from balanced science in secondary courses to the final stages of undergraduate courses.
	dmoz.org /Science/Chemistry/Publications/Journals (3311 words)

	Surface Science Research Centre: Research
		Pasteur's seminal discovery of chirality in 1848 laid the foundation for many scientific advances, namely: the proposition of the tetrahedral carbon (Van't Hoff and Le Bel, 1874) and, subsequently, the emergence of stereochemistry and chirality in chemistry (e.g.
		The induction of chirality at metal surfaces by organic molecules may well be deeper, involving reorganisation of the underlying metal atoms into chiral arrangements.
		The influence of the chiral OH groups is more subtle, yet profound when the overall chirality of the surface is considered.
	svr.ssci.liv.ac.uk /chiral.html (985 words)

	Chem 240 Fall 1999
		Organic chemistry is relentlessly cumulative and intensely interrelated.
		Since organic chemistry is so interrelated, it often happens that students will understand material better in the context of reviewing for the final than was they did when the material was first presented.
		Not if you are a genius, and not if you don't care about learning organic chemistry and/or the grade which reflects that learning.
	chemistry2.csudh.edu /rpendarvis (0 words)

	Molecular Model Sets for Organic Chemistry, Stereochemistry
		It is intended for university level organic and inorganic chemistry and can be augmented for use in VSEPR theory and biochemistry.
		Teachers' chemistry sets allow for more variety in structures & concepts: including alkanes, hydrocarbon derivatives, carbo-cation intermediates, carbonyl compounds, advanced isomerism, conformers, reaction mechanisms, cumulated groups, optical activity (chirality), organic-inorganic molecular and empirical formula structures, imino compounds and fluorocarbons.
		The 62050 Stereo and Crystal Chemistry Set is suitable for organic, organometallic, inorganic molecular & ionic lattice structures.
	www.indigo.com /models/molymod-molecular-model-sets.html (0 words)

	Chiral - Webled.com (Site not responding. Last check: )
		[ Chiral molecules are molecules which are mirror images (enantisomers) of each other (right handed and left handed ]...
		Thus, a wide variety of Chiral alcohols are ]...
		Direct Observation of Large Chiral Domains in Chloroplast Thylakoid Membranes by...
	www.webled.com /searchpage.cfm?startat=80&keywords=Chiral (947 words)

	Knud Lind Larsen Symposium 1
		Chiral molecules are the basic building blocks for physicochemical and biological processes in nature.
		Despite the past 20 years of dramatic improvements in the synthesis and analysis of enantiomerically enriched compounds, there is still a challenge and strong demand on academia and industry for even better and more economic methods.
		In the majority of cases the phamacological or pesticidal effect resides in one single enantiomer of a chiral compound.
	www.atv.dk /a/KLL-Chirality_in_chemistry.html (229 words)

	REFERENCES CHIRAL-AGP
		Chiral HPLC separationsns of vinca alkaloid analogues on
		Chiral stationary phases in HPLC for the stereoselective determination of methadone
		Chiral assay of atenolol present in microdialysis and plasma samples of rats using chiral CBH as stationary phase
	www.chromtech.se /reflist.htm (2397 words)

	Chirality in natural and applied sciences (Site not responding. Last check: )
		An understanding of chirality is central to the study and application of the molecular sciences.
		Chirality in Natural and Applied Science provides a highly practical overview of the chemical significance of chirality and is particularly relevant for pharmaceutical, natural product, organic and analytical chemists, biochemists and molecular biologists.
		Chirality will remain a central part of the understanding of all molecular scientists, and there is little doubt that its importance will increase.
	www.chiral.com /lough.htm (378 words)

	Expert: Synthetic Organometallic Chemistry Expert
		He has conducted research projects involving the chemistry of over half of the transition metals, and is very familiar with the chemistry of the common reagents, as well as the less common intermediates.
		He has been responsible for contributions in substituent effects, synthesis and chemistry of chiral compounds, bimetallic compounds, metal basicity, and reductive elimination of dihydrogen from bimetallic compounds.
		He is well-versed in carbocation chemistry and polymer modification chemistry, and is familiar with aromatic hydrocarbons, crown ether chemistry, organic and inorganic acids, and ethylene oxide
	www.intota.com /viewbio.asp?bioID=614376&perID=711885&show=Full (638 words)

	The Axial Chirality Problem
		The importance of axial chirality to organic chemistry was recognized in 2001, when Ryoji Noyori was co-awarded the Nobel Prize in Chemistry, in part for his work with highly selective catalysts derived from the axially-chiral BINAP ligand.
		Although support for axial chirality could be "hacked" into these languages, this would require nonstandard conventions that would be unintelligible to any third party.
		If PubChem used an internal representation of molecular structure capable of encoding axial chirality, coupled with a suitable molecular language to be used by depositors, separate entries for each gossypol enantiomer would be feasible.
	depth-first.com /articles/2007/01/08/the-axial-chirality-problem (608 words)

	B and C
		For example, according to the latter view, a meso-compound is considered to be composed of two chiral parts of opposite chirality sense; this usage is to be discouraged.
		For example with an allene abC=C=Ccd the chiral axis is defined by the C=C=C bonds; and with an ortho-substituted biphenyl the atoms C-1, C-1', C-4 and C-4' lie on the chiral axis.
		A chirality centre is thus a generalised extension of the concept of the asymmetric carbon atom to central atoms of any element, for example N
	www.chem.qmul.ac.uk /iupac/stereo/BC.html (1536 words)

	Summer Series ‘06 - Chirality at Crown Bench Estates — Grape Juice Archive
		We were driving along on the way to another vineyard, and happened to catch a glimpse of a sign pointing off down a side road in an area that was essentially the middle of nowhere (in wine country that is).
		He become my hero of the trip by tossing in a bit of hardcore chemistry, chirality to be exact, to explain inter-gender tasting differences.
		Chirality is the ability of a substance to exist in two mirror-image forms (like molecular handedness if you want to think of it like that) that rotate polarized light in opposite directions.
	www.blogit.dodgy-at-best.com /grapejuice/2006/08/28/summer-series-06-chirality-at-crown-bench-estates (840 words)

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