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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"head and tail"”.
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The head and tail conjecture for alternating knots
… Jones polynomial is an invariant of knots and links, which produces a sequence of Laurent polynomials. In this work, we study new power series link invariants, derived from the colored Jones polynomial, called its head and tail. We begin with a brief survey of knot theory and the colored …
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Establishment and maintenance of pattern at the ends of the planarian anterior-posterior axis
How cellular and molecular processes are orchestrated to generate complex tissues and anatomical patterns is a longstanding question in biology. Planarians, flatworms capable of remarkable whole-body regeneration, are well suited for the study of patterning. They are adept at establishing pattern …
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Theoretical and simulations-based modeling of micellization in linear and branched surfactant systems
… molecules possessing hydrophilic (head) and hydrophobic (tail) moieties. This dual nature of surfactants leads to interesting phase behavior in aqueous solution as a function of surfactant concentration, including: (i) formation of surfactant monolayers at surfaces and interfaces, …
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Epigenetic effects of benzo(a)pyrene in Fundulus heteroclitus and Danio rerio
… mechanisms that controls gene expression and is vulnerable to early life environmental toxicant exposures. Our goal was to use two fish models, Fundulus heteroclitus and Danio rerio (zebrafish), to study the benzo(a)pyrene (BaP) effects on DNA methylation status and whether the alterations …
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The wetted ramp as a useful tool to service smaller-bodied finfishes at low-head acquatic barriers
… study examined the effects of finfish length and behavior on passage success on the wetted ramp, a proposed passage device for finfishes at low-head aquatic barriers. There were two hypotheses: there is a size effect to passage success because larger fish have relatively less propulsive …
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Surface tension and electroporation of lipid bilayers
… widely used in DNA transfection, gene therapy, and targeted drug delivery and has potential applications in water desalination and filtration. A better, more thorough molecular understanding is needed, however, before such devices can be effectively used and developed. From aqueous pore …
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Studying DNA-Directed Nanoassembly, Hybridization and Mismatch-Discrimination via Plasmon Scattering of Gold Nanoparticles
… properties of spherical gold nanoparticles (nAu) and the specific recognition attributes of DNA to investigate the nAu-DNA assembly formation, and to apply the nanoassemblies for DNA detection. The nanoassembly structures, successfully correlated to the LSPR wavelength shift and the plasmon color …
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BIOSENTERO: Bioinspired Soft Enteroscopic Robot for Facilitating Locomotion, Steering, and Intervention in the Deep Small Intestine
Diagnosing and treating small intestinal disorders such as bleeding, inflammatory bowel disease, and tumors pose significant challenges due to limitations in accessing this anatomical compartment. To address these challenges, we develop BIOSENTERO, a bioinspired soft enteroscopic robot, to …
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Magnetic microparticle trapping and mechanical excitation using domain walls in magnetic microstructures
… lithography, served as the tracks for nucleating and moving DWs, and Invitrogen Dynabeads M-270 magnetic beads were used for the experiment. Tween-20 surfactant in solution and SiO2 capping layers for the structures were used to overcome substrate-bead interaction and maintain bead mobility. The …
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Propulsion through wake synchronization using a flapping foil
… forces, giving fish the ability to turn and accelerate rapidly, and fish are capable of sensing the flow characteristics in their environment using the lateral line, aiding obstacle entrainment, schooling, rheotaxis, and prey detection. A highly maneuverable vehicle that is capable of …
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Microstructural evolution of AISI304 stainless steel in the Steckel Mill rolling process
… of the mill product, deformation simulations and post deformation heat treatments. The mill logs from industry contains information about various process variables such as temperature, roll speed, dimensions of the mill strip and forces applied to it during the hot mill rolling process. The …
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A computer simulation and molecular-thermodynamic framework to model the micellization of ionic branched surfactants in aqueous solution
… leads to increased activity at interfaces and to self-assembly into micellar aggregates beyond a threshold surfactant concentration, referred to as the critical micelle concentration (CMC), in bulk solutions. As a result of these unique attributes, surfactants are used in many …
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Ncd Motor Tail Domain Interactions With Microtubules
… in spindle assembly in oocytes during meiosis and in spindle maintenance in early embryos during mitosis. Ncd interacts with both "highway" and "cargo" microtubules (MTs) in meiotic and mitotic spindles through the action of ATP-dependent and ATP-independent MT binding sites in the head and …
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Determinants of the Acquisition and Display of Behaviors Associated with “Guilt” (Appeasement Behaviors) by Companion Dogs
… (ABs)—such as averting the eyes, lowering the head and tail, or putting the ears back against the head—have been regarded as anecdotal evidence that dogs feel guilty for having committed wrongdoing about which the owner will be displeased. Furthermore, these ABs have been considered a …
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Novel Intermediate Filaments in the Nuclear Envelope: Molecular Cloning and Analysis of Lamins A and C
<p>Lamins A, B and C are the major polypeptides of the nuclear lamina, the filamentous meshwork intercalated between chromatin and the inner nuclear membrane. Amino acid sequences have been deduced from cDNA clones of human lamins A and C which show identity with the exception of an additional 98 …
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Investigation of formation and applications of high-speed liquid projectiles
The work comprises experimental and numerical studies of generation and application of high-speed liquid projectiles. Numerical models were created for a projectile formation by two kinds of launchers, water extruder and water cannon. In the water extruder the kinetic energy of a fast moving piston …
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Equine Spermatogenesis: Meiotic Chromosome Behavior and Recombination
… cause embryonic loss, congenital abnormalities and infertility. Little is known about the spermatogenesis in horse. This is the first report that investigates the horse spermatogenesis in detail, particularly metaphase I (MI) and prophase I (PI) stages of the first meiotic division. Meiotic …
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Using CRISPR/Cas9 to modify the genome of cattle
… The gene editing technology CRISPR has expanded the possibilities of gene editing. The Cas9 nuclease creates a double strand break which can be repaired by non-homologous end joining (NHEJ) or homology directed repair (HDR). The goal of this experiment was to create a single nucleotide …
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High-throughput, single-worm tracking and analysis in Caenorhabditis elegans
… Its whole genome has been sequenced. The lineage and fate, for each one of the cells in wild-type (N2) worms, is known. The connectivity, for all 302 neurons of wild-type hermaphrodites, has been mapped. Many of its genes have homologs within other organisms, including humans. C. elegans have a …
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Optimierung der Stahlbandgeometrie im Hinblick auf den Bandsäbel in Warmbreitbandstrassen
… even impossible to remove in downstream lines, and may lead to a reduction of output figures as a result of their interference with forming and other subsequent processes. This work examined the formation of the so-called camber - the curvature of the strip in the strip plane - during the …