|
|
|
| Registros recuperados: 383 | |
|
|
| Claudiu I. Bandea. |
| The cellular theory on the nature of life has been one of the first major advancements in biology. Viruses, however, are the most abundant life forms, and their exclusion from mainstream biology and the Tree of Life (TOL) is a major paradox in biology. This article presents a broad, unifying scenario on the origin and evolution of cellular and viral domains that challenges the conventional views about the history of life and supports a TOL that includes viruses. Co-evolution of viruses and their host cells has led to some of the most remarkable developments and transitions in the evolution of life, including the origin of non-coding DNA as a genomic protective device against viral insertion damage. However, one of the major fundamental evolutionary... |
| Tipo: Manuscript |
Palavras-chave: Genetics & Genomics; Immunology; Microbiology; Evolutionary Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3888/version/1 |
| |
|
|
| J. Ryan Porter; Steven M. Platek. |
| Bias for an in-group is a social phenomenon characterized by an affinity for one’s in-group over a perceived out-group. Activation in the amygdala, which is implicated in social and emotional processes, is increased when humans view other-race faces. This increase in activation is associated with implicit racial bias as indicated by scores on an implicit attitude test. Contagious yawning is a social process that appears to subserve empathic processes enabling the inferential modeling of the mental states of others and is exhibited in few species other than humans, including chimpanzees (Pan troglodytes), stumptail macaques (Macaca arctoides), dogs (Canis familiaris), and budgerigars (Melopsittacus undulatus). Despite these comparative data,... |
| Tipo: Manuscript |
Palavras-chave: Neuroscience; Evolutionary Biology. |
| Ano: 2012 |
URL: http://precedings.nature.com/documents/6875/version/1 |
| |
|
|
| Michael E. Baker; Kayla Y. Uh; Paiyuam Asnaashari. |
| The serum of Atlantic sea lamprey, a basal vertebrate, contains two corticosteroids, 11-deoxycortisol and deoxycorticosterone. Only 11-deoxycortisol has high affinity [Kd~3 nM] for the corticoid receptor [CR] in lamprey gill cytosol. To investigate the binding of 11-deoxycortisol to the CR, we constructed 3D models of lamprey CR complexed with 11-deoxycortisol and deoxycorticosterone. These 3D models reveal that Leu-220 and Met-299 in lamprey CR have contacts with the 17[alpha]-hydroxyl on 11-deoxycortisol. Lamprey CR is the ancestor of the mineralocorticoid receptor [MR] and glucocorticoid receptor [GR]. Unlike human MR and human GR, the 3D model of lamprey CR finds a van der Waals contact between Cys-227 in helix 3 and Met-264 in helix 5. Mutant... |
| Tipo: Manuscript |
Palavras-chave: Cancer; Developmental Biology; Pharmacology; Bioinformatics; Evolutionary Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6216/version/1 |
| |
|
|
| Chalapathy K. Reddy; Vishal V. Naole. |
| Jatropha seed and oil yield is function of planting material used, growing conditions, plant architecture development and maintenance. Jatropha is hardy plant; thrives well in arid and semi arid regions with an average rainfall ranging from 500 to 1200 mm. It has been planted in varied soil types, marginal and waste lands; where in utilization of in situ resources by agronomic practices and development and management of canopy by pruning are very crucial for harvesting higher seed for biodiesel production. Building ideal canopy by pruning during first growing season is very important. Pruning is done during winter season when plants are in dormant condition. |
| Tipo: Manuscript |
Palavras-chave: Developmental Biology; Earth & Environment; Plant Biology; Evolutionary Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3700/version/1 |
| |
|
|
| Chrisantha Fernando; Vera Vasas; Eörs Szathmáry; Philip Husbands. |
| We present a novel algorithm that exhibits natural selection of paths in a network. If each node and weighted directed edge has a unique identifier, a path in the network is defined as an ordered list of these unique identifiers. We take a population perspective and view each path as a genotype. If each node has a node phenotype then a path phenotype is defined as the list of node phenotypes in order of traversal. We show that given appropriate path traversal, weight change and structural plasticity rules, a path is a unit of evolution because it can exhibit multiplicative growth (i.e. change it’s probability of being traversed), and have variation and heredity. Thus, a unit of evolution need not be a spatially distinct physical individual. The... |
| Tipo: Manuscript |
Palavras-chave: Neuroscience; Evolutionary Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/5535/version/1 |
| |
|
| |
|
|
| Xiaolong Wang; Shuang-yong Xu; Deming Gou. |
| Alignment of DNA and protein sequences is a basic tool in the study of evolutionary, structural and functional relationship among macromolecules. Present sequence alignment methods are somewhat error-prone, often producing systematic bias. Errors in sequence alignments sometimes lead to subsequent misinterpretation of evolutionary, structural and functional information in genes, proteins and genomes. In traditional sequence alignment algorithms, alignments of DNA and protein sequences are conducted separately. It has been long believed that the phylogenetic signal disappears more rapidly from DNA sequences than from encoded proteins. It is therefore generally preferable to align sequences at the amino acid level. Here we present a new... |
| Tipo: Manuscript |
Palavras-chave: Biotechnology; Genetics & Genomics; Microbiology; Bioinformatics; Evolutionary Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4898/version/1 |
| |
|
|
| Niccolo Caldararo. |
| The recently published Altai fossil sequence from Denisova Cave was purported to be so different from anatomically modern humans, yet have the physiological landmarks of that species designation. When the published sequence was examined it was found that segments in the mtDNA hypervariable regions could be found to align with that of anatomically modern humans if one introduced an insertion at a position found in Neanderthals. Some other points of interest arise from a reconsideration of the sequences for other published samples and Neanderthals from the same perspective. |
| Tipo: Manuscript |
Palavras-chave: Evolutionary Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/5360/version/1 |
| |
|
|
| Philippe Desjardins-Proulx. |
| Patterns of biodiversity predicted by the neutral theory rely on a simple phenomenological model of speciation. To further investigate the effect of speciation on neutral biodiversity, we define the metacommunity as a system of populations exchanging migrants and use this framework to study allopatric & parapatric speciation. We find that with realistic mutation rates, our metacommunity model driven by neutral processes cannot support more than a few species. Adding natural selection in the population genetics of speciation increases the number of species in the metacommunity but the level of diversity found in Barro Colorado Island is difficult to reach. |
| Tipo: Presentation |
Palavras-chave: Ecology; Evolutionary Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6054/version/1 |
| |
|
|
| Nicholas J. Matzke. |
| For Google Summer of Code 2009/NESCENT Phyloinformatics Summer of Code 2009, I built a Geography module for Biopython. The purpose of the module is to search, download, and process biogeographical data from GBIF, much as Biopython currently accesses Genbank. Application of the tool to a historical biogeography study on bivalves will be illustrated.

As required by Google Summer of Code and Biopython, the code is open access and is released under the Biopython License:
"http://www.biopython.org/DIST/LICENSE":http://www.biopython.org/DIST/LICENSE

The module is described, and a tutorial is presented, on the Biopython... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Bioinformatics; Evolutionary Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4676/version/1 |
| |
|
|
| Mark Nielsen; Keyan Tomaselli. |
| Children grow up in environments saturated with tools and objects which they must learn to use. One of the most efficient ways in which children do this is by imitating. Recent work has shown that, in contrast to non-human primates, when young children learn by imitating they focus more on reproducing the specific actions used than the actual outcomes achieved. From about 18 months of age children will routinely copy arbitrary and unnecessary actions. This puzzling behaviour is called 'over-imitation'. By documenting similarities exhibited by children from a large, industrialised city and children from remote Bushman communities in southern Africa, we provide here the first indication that over-imitation is a universal human trait. We... |
| Tipo: Manuscript |
Palavras-chave: Evolutionary Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3049/version/1 |
| |
|
|
| T. Michael Keesey. |
| _Names on Nodes_^1^ is an open‑source^2^ Flex application which utilizes a mathematical approach to automate the application of phylogenetically‑defined names to phylogenetic hypotheses. Phylogenetic hypotheses are modeled as directed, acyclic graphs, and may be read from bioinformatics or graph files (NEXUS, NexML, Newick, and GraphML) or created de novo. Hypotheses may also be merged from multiple sources. _Names on Nodes_ stores hypotheses as MathML, an XML‑based language for representing mathematical content and presentation. Phylogenetic definitions may be constructed using a visual editor and exported in MathML. Thus, it is possible to create a dictionary of defined names and automatically apply them to phylogenetic... |
| Tipo: Poster |
Palavras-chave: Bioinformatics; Evolutionary Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4653/version/1 |
| |
|
|
| Hector Zenil; James A. R. Marshall. |
| While evolution has inspired algorithmic methods of heuristic optimisation, little has been done in the way of using concepts of computation to advance our understanding of salient aspects of biological evolution. We argue that under reasonable assumptions, interesting conclusions can be drawn that are of relevance to behavioural evolution. We will focus on two important features of life--robustness and fitness optimisation--which, we will argue, are related to algorithmic probability and to the thermodynamics of computation, subjects that may be capable of explaining and modelling key features of living organisms, and which can be used in understanding and formulating algorithms of evolutionary computation. |
| Tipo: Manuscript |
Palavras-chave: Evolutionary Biology. |
| Ano: 2012 |
URL: http://precedings.nature.com/documents/6867/version/1 |
| |
|
| |
|
|
| Aditya Mittal. |
| Pattern generation and recognition in 3-D space have been of wide interest in fields varying from atomic and molecular structures to organization of celestial objects. Our thoughts towards investigating patterns (and elucidation of geometrical rules) followed by a known number of points with specific or specified coordinates are guided by the assumption/belief that there must be some thermodynamic and/or kinetic basis leading to the organization of coordinates of the known points. In terms of biomolecular structures, the DNA double helix is one of the strongest examples of such structures with coordinates of atoms in the phosphate backbone and the side-chains provide a helical geometrical configuration. It needs to be appreciated (and emphasized) that,... |
| Tipo: Presentation |
Palavras-chave: Biotechnology; Chemistry; Molecular Cell Biology; Bioinformatics; Evolutionary Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6038/version/1 |
| |
|
|
| Davide Piffer. |
| Human sleep patterns differ across age groups and between males and females, and their association with age and gender suggest that they might have been the target of sexual selection during human evolutionary history. In this study, I will test the hypothesis that a phase-delayed circadian phase is a sexually selected trait in humans. A short version of the Horne and Ostberg questionnaire and a questionnaire on sexual behaviour were administered to 134 males and 140 females. A significant negative relationship was found between the MEQ score and the number of sexual partners among males, with evening types reporting more sexual partners than morning types. No significant relationship between females MEQ and number of sexual partners was found. Findings... |
| Tipo: Manuscript |
Palavras-chave: Evolutionary Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/2964/version/1 |
| |
|
|
| Meysam Shafiee Ardestani. |
| Abderaz Formation at its type section with an age of Turonian-Early Campanian and a thickness of 300 m contains light grey shale and marl. The study of the planktonic foraminifera in isolated form led to differentiate three morphotype groups. The first group is characterized by trochospiral tests usually indicate shallow waters, the second group contains forms with strong ornamentations and the primary keels representing mid waters and finally compact trochospiral tests with keels known as deep water indices are included in the third group. Studies on the morphotypes showed a regressive cycle for Abderaz Formation. |
| Tipo: Manuscript |
Palavras-chave: Ecology; Earth & Environment; Evolutionary Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3189/version/1 |
| |
|
|
| Juan Pablo Martinez-Soriano; Katia Avina-Padilla. |
| Maize is the essential crop of the Americas. Maize appeared suddenly about 8,500 years ago as domesticated teosinte; however, there is no evidence (genetical, archaeological, linguistic or ethnobotanical) able to support a gradual transformation from the teosinte ear into the corn ear. Teosinte has never been cultivated by Americans, nor did they ever attempt to domesticate it. Its grains were not used as food, making unrealistic the assumption that prehispanics created something edible from seeds that were not so. Plant domestication is a slow process in almost every known crop but maize evolution might not be the case. Teosinte has a brittle cob, whereas maize forms solid ones that do not release their seeds 2. The latter are soft, while in teosinte they... |
| Tipo: Manuscript |
Palavras-chave: Plant Biology; Evolutionary Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3240/version/1 |
| |
|
|
| Dingyuan Tan. |
| Attention is a fundamental function of the human which is important in our daily life. Perceptual load is thought to play an important role in selective attention^1,2^. When perceptual load is high, the distracting information will be kept out of perception and will not affect us. When perceptual load is low, the distracting information will be processed deeply by us and will influence us^3^. However, most of the past research was concerned with binocular attention instead of monocular attention. In spite of the differences such as visual acuity^4^, stereopsis^5,6^ between binocular and monocular vision, there were few reports of their difference regarding to perceptual load which means more items and features in our research. Here we show their difference... |
| Tipo: Manuscript |
Palavras-chave: Neuroscience; Evolutionary Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/5166/version/1 |
| |
|
|
| Elena Mokhova. |
| Some “animal-like” protozoa are used instead of mammalian cells in diverse investigations. _Tetrahymena pyriformis_ cells in stationary phase of growth and washed from oxidative substrates (_T.pyriformis_) function under conditions of reduced oxidative metabolism. To elucidate if _T.pyriformis_ can be applied as a model for mitochondrial energetics study in mammalian cells during hibernation, the features of _T.pyriformis_ mitochondria were compared with that of liver mitochondria isolated from hibernating animals; the published earlier data were used. Based on the respiration recording and observation of Mito Tracker Red fluorescence in living _T.pyriformis_ we tentatively concluded that the mitochondrial electrical membrane... |
| Tipo: Manuscript |
Palavras-chave: Molecular Cell Biology; Evolutionary Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4521/version/2 |
| |
| Registros recuperados: 383 | |
|
|
|
