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arXiv (509,308 recursos)
This is one of the most extensive subject based repositories in the world in the field of physics, mathematics, astronomy, computer sciences and quantitative biology. This is the principal site with almost 20 mirror versions around the globe. The site is supported by an extensive collection of information and background documentation. An RSS feed is available for anyone interested in keeping up-to-date with newly added materials.

Mostrando recursos 161 - 180 de 4,680

161. Remodeling of biological tissue: Mechanically induced reorientation of a transversely isotropic chain network - Kuhl, E.; Garikipati, K.; Arruda, E. M.; Grosh, K.
On the macrolevel, the network of collagen chains is represented by a transversely isotropic eight chain unit cell introducing one characteristic material axis.

162. Opportunistic infection as a cause of transient viremia in chronically infected HIV patients under treatment with HAART - Jones, Laura E.; Perelson, Alan S.
When highly active antiretroviral therapy is administered for long periods of time to HIV-1 infected patients, most patients achieve viral loads that are ``undetectable'' by standard assay (i.e., HIV-1 RNA $ < 50$ copies/ml).

163. Why high-error-rate random mutagenesis libraries are enriched in functional and improved proteins - Drummond, D. Allan; Iverson, Brent L.; Georgiou, George; Arnold, Frances H.
Recently, several groups have used error-prone polymerase chain reactions to construct mutant libraries containing up to 27 nucleotide mutations per gene on average, and reported a striking observation: although retention of protein function initially declines exponentially with mutations as has previously been observed, orders of magnitude more proteins remain viable at the highest mutation rates than this trend would predict.

164. Native geometry and the dynamics of protein folding - Faisca, P. F. N.; da Gama, M. M. Telo
In this paper we investigate the role of native geometry on the kinetics of protein folding based on simple lattice models and Monte Carlo simulations.

165. Systematic identification of abundant A-to-I editing sites in the human transcriptome - Levanon, Erez Y.; Eisenberg, Eli; Yelin, Rodrigo; Nemzer, Sergey; Hallegger, Martina; Shemesh, Ronen; Fligelman, Zipora Y.; Shoshan, Avi; Pollock, Sarah R.; Sztybel, Dan; Olshansky, Moshe; Rechavi, Gideon; Jantsch, Michael F.
RNA editing by members of the double-stranded RNA-specific ADAR family leads to site-specific conversion of adenosine to inosine (A-to-I) in precursor messenger RNAs.

166. Evolutionary dynamics of adult stem cells: Comparison of random and immortal strand segregation mechanisms - Tannenbaum, Emmanuel; Sherley, James L.; Shakhnovich, Eugene I.
We consider two modes of chromosome segregation: (1) Random segregation, where the daughter chromosomes of a given parent chromosome segregate randomly into the stem cell and its differentiating sister cell.

167. A Statistical Analysis of RNA Folding Algorithms Through Thermodynamic Parameter Perturbation - Layton, D. M.; Bundschuh, R.
Computational RNA secondary structure prediction is rather well established.

168. Cognitive styles sex the brain, compete neurally, and quantify deficits in autism - Goldenfeld, Nigel; Wheelwright, Sally; Baron-Cohen, Simon
Methods: Two questionnaires, the Systemizing Quotient (SQ) and the Empathy Quotient (EQ), were administered to a normal control group and a group of individuals with Asperger Syndrome (AS) or High-Functioning Autism (HFA).

169. A Structured-Population Model of Proteus mirabilis Swarm-Colony Development - Ayati, Bruce P.
In this paper we present continuous age- and space-structured models and numerical computations of Proteus mirabilis swarm-colony development.

170. Looking at structure, stability, and evolution of proteins through the principal eigenvector of contact matrices and hydrophobicity profiles - Bastolla, Ugo; Porto, Markus; Roman, H. Eduardo; Vendruscolo, Michele
We review and further develop an analytical model that describes how thermodynamic constraints on the stability of the native state influence protein evolution in a site-specific manner.

171. Transcriptional Regulation by the Numbers 1: Models - Bintu, Lacramioara; Buchler, Nicolas E.; Garcia, Hernan G.; Gerland, Ulrich; Hwa, Terence; Kondev, Jane'; Phillips, Rob
The study of gene regulation and expression is often discussed in quantitative terms.

172. Transcriptional Regulation by the Numbers 2: Applications - Bintu, Lacramioara; Buchler, Nicolas E.; Garcia, Hernan G.; Gerland, Ulrich; Hwa, Terence; Kondev, Jane'; Kuhlman, Thomas; Phillips, Rob
The thermodynamic models reviewed in the preceding paper provide a useful framework for the quantitative analysis of bacterial transcription regulation.

173. A double-deletion method to quantifying incremental binding energies in proteins from experiment. Example of a destabilizing hydrogen bonding pair - Campos, Luis A.; Cuesta-Lopez, Santiago; Lopez-Llano, Jon; Falo, Fernando; Sancho, Javier
The contribution of a specific hydrogen bond in apoflavodoxin to protein stability is investigated by combining theory, experiment and simulation.

174. A one-dimensional Lattice Boltzmann method for modeling the dynamic pole-to-pole oscillations of Min proteins for determining the position of the midcell division plane - Ngamsaad, Waipot; Triampo, Wannapong; Kanthang, Paisan; Tang, I-Ming; Nuttawut, Narin; Modjung, Charin
Here, the Lattice Boltzmann method (LBM) is used to study the dynamics of the oscillations of the min proteins from pole to pole.

175. A New DNA Sequences Vector Space on a Genetic Code Galois Field - Sanchez, Robersy; Perfetti, Luis A.; Grau, Ricardo; Morgado, Eberto
A new n-dimensional vector space of the DNA sequences on the Galois field of the 64 codons (GF(64)) is proposed.

176. The dynamics of the min proteins of Escherichia coli under the constant external fields - Kanthang, Paisan; Ngamsaad, Waipot; Modchang, Charin; Triampo, Wannapong; Nuttawut, Narin; Tang, I-Ming; Lenbury, Yongwimol
Exposure to a constant external field e.g., an electric field or magnetic field may cause the bacteria cell division mechanism to change resulting in an abnormal cytokinesis.

177. Conformational transformations of DNA macromolecule in heteronomous conformation - Kanevska, P. P.; Volkov, S. N.
To understand the mechanism of TATA-box conformational transformations we model structure mobility and find the types of conformational excitations of DNA macromolecule in heteronomous conformation.

178. Forcing reversibility in the no strand-bias substitution model allows for the theoretical and practical identifiability of its 5 parameters from pairwise DNA sequence comparisons - Zagordi, O.; Lobry, J. R.
Because of the base pairing rules in DNA, some mutations experienced by a portion of DNA during its evolution result in the same substitution, as we can only observe differences in coupled nucleotides.

179. Tradeoff between short-term and long-term adaptation in a changing environment - Forster, Robert; Wilke, Claus O.
One of the strains is adapted to the long-term environment, but pays a short-term cost, while the other is adapted to the short-term environment and pays a cost in the long term.

180. Love before Sex - Abdullah, Wan Ahmad Tajuddin Wan
Much has been debated about the benefit of sexual over asexual reproduction in terms of evolutionary fitness.

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