 | Particle-based Viscoelastic Fluid Simulation Results of this paper: http://www.iro.umontreal.ca/labs/infographie/papers/Clavet-2005-PVFS/index.html |
 | Food Testing.wmv An Instron electromechanical system performing a puncture test on an apple. Testing food products for texture-related qualities enables the food industry to develop new products and improve upon existing ones. Food technologists worldwide are using precision equipment to measure texture properties of food, including ripeness, chewiness, gumminess, brittleness, viscoelasticity, and tenderness. For more information on food testing visit us at http://www.instron.us/wa/solutions/food_testing_solutions.aspx |
 | GOODBYE DARWINIAN REDUCTIONISM, NATURAL SELECTION NO LONGER THE CENTERPIECE OF THE MODERN SYNTHESIS! See BELOW Suzan Mazur links... and TITLE of the paper from which quotes were taken (DPMs; Newman and Bhat 2008)... EARTHSHAKING? GOODBYE DARWINIAN REDUCTIONISM TRANSITION IN SCIENCE AND A BIG SHIFT ON HUMANITY'S VIEW OF ITS WHEREABOUTS IN THE UNIVERSE: "natural selection and genetic drift" are NO LONGER the centerpieces of the modern evolutionary synthesis but "DYNAMICAL PATTERNING MODULES" (DPMs) ___________________________________ THE PROPERTY OF SELF-ORGANIZATION COMES FROM THE PHYSICS AND CHEMISTRY THAT MAKE UP BIOLOGICAL MATTER. WHAT ARE DPMs? WHAT ARE DPMs? The products (plastic molecular players) of the toolkit genes involved in self-organization, a "pattern language" (the molecules of DPMs) that drive morphogenesis and pattern formation in all animal species... "... without concomitant genotypic change or selection for adaptation" "...a pattern language capable of generating all metazoan body plans and organ forms" HOW? HOW? DPMs... PLASTIC MOLECULAR PLAYERS performing at an EPIGENETIC LEVEL mobilizing physical processes OF SELF-ORGANIZATION: "cohesion, viscoelasticity, diffusion, spatiotemporal heterogeneity based on lateral inhibition and multistable and oscillatory dynamics." "The physical dimension of developmental causation implies that multicellular forms during the explosive radiation of animal body plans in the middle Cambrian, approximately 530 million years ago, could have explored an extensive morphospace without concomitant GENOTYPIC CHANGE or selection for adaptation." UNIVERSAL FORMS? UNIVERSAL FORMS? "... DPMs, despite the plasticity they embody, are limited in the forms they can generate." WHY? "... Although they have the potential to transform different anatomies from one into the other with little or no genetic change, DPMs, by mediating adhesion and tissue multilayering, the generation of spatially nonuniform and temporally periodic cell states, and cell polarity are CONSTRAINED to mold cell masses into ONLY THOSE MORPHOLOGIES which are characteristic of chemically and mechanically excitable mesoscopic materials, e.g., HOLLOW, MULTILAYERED, ELONGATED, SEGMENTED and BRANCHED forms. BUT THESE ARE, in fact, the common morphological motifs of all metazoan body plans and organ forms" ________________________________ MIT Press will publish a book about the Extended Evolutionary Synthesis... and these developments next year (2009)... In the eve of Darwin's 200th anniversary... ¿? But of course this advancements in science couldn't have happened without Charles Darwin's genius and ideas _______________________________ SCIENTIFIC PAPER PAPER PAPER PAPER: The quotes above and those in the first part of the vid. (along the first soundtrack) are from: DYNAMICAL PATTERNING MODULES: physico-genetic determinants of morphological development and evolution by Stuart A Newman and Ramray Bhat Department of Cell Biology and Anatomy, New York Medical College, Valhalla, NY 10595, USA Accepted for publication 17 March 2008 YOU CAN GET THIS SCIENTIFIC PAPER AT: http://www.iop.org/EJ/abstract/1478-3975/5/1/015008 _____________________________________________________ On the genetic toolkit (fruit flies and mice): http://es.youtube.com/watch?v=LFG-aLidT8s __________________________________________________________ LINKS LINKS LINKS LINKS For more visit these links from Scoop News Independent, from insightful reporter SUZAN MAZUR, who's been informing us about these developments in science: Stuart Newman, The New Master Of Evolution?: http://www.scoop.co.nz/stories/HL0804/S00103.htm Ramray Bhat: Origin Of Body Plans: http://www.scoop.co.nz/stories/HL0804/S00213.htm Everett Just's symposium (already closed): http://www.scoop.co.nz/stories/HL0811/S00226.htm _____________________________________________________ soundtracks from Elizabeth: The Golden Age |
 | CReTA algorithm B The video shows the contour reduction operation described in paper Macromolecules 2006, vol. 39, pg. 4592-4604, which is able to reveal the underlying entanglement structure of a flexible polymer melt. The initial configuration is atomistic polyethylene, 8 chains, with full periodic boundary conditions applied. Chain ends are fixed in space, and by prohibiting chain crossing, the contour lengths of all chains are simultaneously minimized (shrunk), until they become sets of rectilinear strands coming together at the nodal points of a network. The nodal points are the Topological Constraints generated by chain uncrossability. As the algorithm proceeds, and in order to facilitate contour reduction through the removal of unentangled loops, chain thickness is progressively reduced towards a zero value. |
 | CReTA algorithm A The video shows the contour reduction operation described in paper Macromolecules 2006, vol. 39, pg. 4592-4604, for a polyethylene chain, which is free of topological constraints. Chain ends are fixed in space. The contour length of the chain is minimized (shrunk), until it will become a straight line. |
 | Memory foam pillow originally recorded for mary23 ;) |
 | fisica - elasticidad de las bolsas experimento de investigacion |
 | Use of Healon 5 in Floppy Iris Cataract Surgery Uday Devgan MD's technique to treat iris prolapse and floppy iris syndrome with Healon 5 viscoelastic |
 | Free floating cyst in anterior chamber after cataract surger Case Report A 73-year-old woman underwent uneventful phacoemulsification and foldable lens implantation OD. The best-corrected visual acuity OD one week after surgery was 20/20 and the slit-lamp examination was unremarkable. Six weeks later, however, she noted the onset of intermittent shadows in this eye whenever she changed head position. A free-floating cyst in the anterior chamber was noted by the surgeon where upon the patient was referred to our eye center for treatment. Our examination confirmed the presence of a round, free-floating, clear cystic lesion (3-4 mm in diameter) that traversed the central visual axis during saccadic eye movements or whenever the patient lay supine (Fig. 1). The surgical wound appeared intact and there were no signs of iris injury or intraocular inflammation. The dilated fundus examination was normal and the intraocular pressure was 15mmHg. The cyst was expressed out intactly through a limbal incision with viscoelastic injection into the anterior. Subsequent histopathological examination of the cyst showed non-keratinized squamous epithelial cells. The visual acuity at one week after cyst removal was 20/25+2. Discussion A variety of cysts can occur in the anterior chamber. Congenital iris stromal cysts are common in children and iris pigment epithelial cysts may be seen in young or middle-aged individuals.2,3 Histopathologically, such cysts consist of an inner wall of iris pigment epithelium with pigment granules.2 In our patient, the inner lining of the cyst contained non-keratinized squamous epithelium, typical of ocular surface cells. If left alone, free-floating cysts can either remain stable or grow in size, causing visual disturbances, secondary glaucoma, and corneal edema. Treatment recommendations include observation or excision. References Singh G, Narendran K, Saravanan VR, et al. Pigmented free-floating iris cysts. Br J Ophthalmol 2007;91:1037. Paysse EA, Coats DK. Free-floating cyst in the anterior chamber. Arch Ophthalmol 1998;116:1256-7. Shields JA, Shields CL, DePotter P, et al. Free-floating cyst in the anterior chamber of the eye. J Pediatr Ophthalmol Strabismus 1996;33:330-1. |
 | material rolling viscoelastic material rolling process |
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