Consulta: subjectFacets:"Asymmetry"
Registros recuperados: 24
Data/hora: 10/06/2024 18:24:01

Irrigation experiments in the lab: trust, environmental variability, and collective action
Provedor de dados: 7
Autores: Baggio, Jacopo A.; Center for Behavior, Institutions and the Environment, Arizona State University; Department of Environment and Society, Utah State University; jbaggio@asu.edu; Rollins, Nathan D.; Center for Behavior, Institutions and the Environment, School of Human Evolution and Social Change, Arizona State University; nathan.rollins@asu.edu; Janssen, Marco A.; Center for Behavior, Institutions and the Environment, School of Sustainability, Arizona State University; Marco.Janssen@asu.edu.
Research on collective action and common-pool resources is extensive. However, little work has concentrated on the effect of variability in resource availability and collective action, especially in the context of asymmetric access to resources. Earlier works have demonstrated that environmental variability often leads to a reduction of collective action in the governance of shared resources. Here we assess how environmental variability may impact collective action. We performed a behavioral experiment involving an irrigation dilemma. In this dilemma participants invested first into a public fund that generated water resources for the group, which were subsequently appropriated by one participant at a time from head end to tail end. The amount of resource...
Tipo: Peer-Reviewed Reports
Palavras-chave: Asymmetry; Common-pool resources; Feedbacks; Laboratory experiments; Trust; Variability.
Ano: 2015

Comparative karyotype analysis of populations in the Alstroemeria presliana Herbert (Alstroemeriaceae) complex in Chile
Provedor de dados: 74
Autores: Baeza,Carlos; Finot,Víctor L.; Ruiz,Eduardo.
Alstroemeria L., one of the most diverse genera of the Chilean flora and of high floricultural value, is represented by 35 species, most of them distributed between 28–38° S in the Mediterranean zone of Central Chile. There are 24 complex-forming taxa, of which 18 have conservation problems (8 are considered “endangered” and 10 as “vulnerable”). One of these complexes is Alstroemeria presliana Herb. with two subspecies: subsp. presliana and subsp. australis Bayer. Alstroemeria presliana grows in Chile and Argentina: subsp. presliana is distributed from Reserva Nacional Siete Tazas (35°27′ S, Region of Maule) to Antuco, (37°25′ S, Region of Bío-Bío), and is also found in Neuquén, Argentina; subsp. australis is endemic to the Cordillera of Nahuelbuta. A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alstroemeria; Asymmetry; Chile; Karyotype; Species complex.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000200199

Cytotaxonomic study of the Chilean endemic complex Alstroemeria magnifica Herb. (Alstroemeriaceae)
Provedor de dados: 74
Autores: Baeza,Carlos M.; Finot,Víctor; Ruiz,Eduardo; Carrasco,Pedro; Novoa,Patricio; Rosas,Marcelo; Toro-Núñez,Oscar.
Abstract Alstroemeria L. (Alstroemeriaceae) represents one of the most diverse genera of vascular plants in Chile. It contains approximately 54 taxa, 40 of which are endemic. The “complex” Alstroemeria magnifica is endemic to Chile, and it comprises four varieties: A. magnifica var. magenta, A. magnifica var. magnifica, A. magnifica var. sierrae, and A. magnifica var. tofoensis. It is distributed from Coquimbo to the Valparaíso Region. We analyzed karyotypes of 10 populations along its natural distribution. All the populations presented an asymmetric karyotype, with 2n = 16 chromosomes but with three different karyotypic formulae. Alstroemeria magnifica var. magnifica and A. magnifica var. sierrae presented the same karyotypic fomula, and A. magnifica var....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alstroemeria; Karyotype; Species complex; Asymmetry; Chile.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000300434

Analysis of shell colour determinism in the Manila clam Ruditapes philippinarum
Provedor de dados: 5
Autores: Peignon, Jean-marie; Gerard, Andre; Naciri, Yamama; Ledu, Christophe; Phelipot, Pascal.
The Manila clam presents a large polymorphism for shell colours and patterns. No experiment has been conducted to study the determinism of such a polymorphism which has been well known for a long time. The aim of this study was firstly to determine the genetic variation for shell colour and secondly to produce some homozygous lines for the shell colouring. These lines could then be used as controls for laboratory experiments. The colouring is defined by three characters: asymmetry, ornamentation and hue. Clams with asymmetrical colouring are not fully pigmented, except for a posterior band on the left valve. Clams with symmetrical colouring are fully pigmented on the two valves. Four cross series were conducted between the different characters: Asymmetry...
Tipo: Text
Palavras-chave: Mollusque; Bivalve; Palourde; Ruditapes philippinarum; Génétique; Hérédité mendélienne; Coloration; Asymétrie; Mollusc; Bivalve; Manila clam; Ruditapes philippinarum; Genetics; Mendelian inheritance; Colouration; Asymmetry.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/publication-3204.pdf

Lateral Asymmetry in Upper and Lower Limb Bioelectrical Impedance Analysis in Youth Tennis Players
Provedor de dados: 77
Autores: Filipcic,Ales; Cuk,Ivan; Filipcic,Tjasa.
Tennis is a sport that requires asymmetric movements of dominat limbs and may lead to an asymmetric distribution of muscle mass. The main aim of the presented study was to determine the volume and degree of lateral asymmetry of the upper and lower limbs in youth tennis players using a bioelectrical impedance analysis. T-test was applied to find differences between the dominant and non-dominant arm and the right and left leg and thigh in four age categories. There were no significant differences between the right and left leg lean mass in the 12 and under, 14 and under and 16 and under age groups, but there were significant differences between the dominant and non-dominant arm lean mass and arm circumferences in all four age groups. All young tennis players...
Tipo: Journal article
Palavras-chave: Young tennis players; Asymmetry; Bioelectrical impedance analysis.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000300012

The Asymmetry and Modularity of the Hyoid Bone
Provedor de dados: 77
Autores: Urbanová,Petra; Hejna,Petr; Zátopková,Lenka; Safr,Miroslav.
Morphological variation is a result of interplay among multiple intervening factors. For hyoid bones, the shape and size differences have been scarcely covered in the literature and in majority limited to studies of sexual dimorphism or age dependency. To our knowledge, the human hyoid bone, in complete opposite to other cranial bones, has not been fully utilized to address development questions in terms of asymmetry or modularity. In the present paper, we used landmark-based methods of geometric morphometrics and multivariate statistical approach to study human hyoid morphology represented by the hyoid body and greater horns in a sample of 211 fused and non-fused bones. Within a sample variation analysis, we showed that the hyoid bone is, by nature,...
Tipo: Journal article
Palavras-chave: Hyoid bone; Asymmetry; Modularity; Geometric morphometrics.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000100042

Asymmetry of Human Skull Base During Growth
Provedor de dados: 77
Autores: Russo,Priscilla Perez; Smith,Ricardo Luiz.
Knowledge about human skull asymmetry in normal dry specimens is useful as a parameter for medical and dentistry practice. Skull base was investigated with the objective to validate the method of indirect measurement with digital pictures and to evaluate the degree of asymmetry from human skull base in different ages. We analyzed 176 normal identified human skulls, divided by age in the following groups: Fetuses, newborn, children and adults. Measures were taken from a central point: pharyngeal tubercle and 4 lateral points: foramen ovale, foramen spinosum, carotid canal and stylomastoid foramen using digital biometry after a comparative validation with directed method performed with caliper. Results were presented as asymmetry indexes and data were...
Tipo: Journal article
Palavras-chave: Anatomy; Asymmetry; Growth; Skull.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300062

A Comparison of the Relationship between the Golden Ratio and Anatomical Characteristics of the Supraorbital Foramen in Bare Skulls Belonging to the Byzantine Era and Modern Era
Provedor de dados: 77
Autores: Bakirci,S; Kafa,I. M; Coskun,I; Buyukuysal,M. C; Barut,C.
The aim of the present study is to determine the frequency of the occurrence of supraorbital foramen/notch (SOF/N) in the skulls of the people who lived in the modern era and the late Byzantine era, to determine the symmetry and the asymmetry between the two halves of the skulls by measuring the linear distance to various landmarks, to check the consistency between the location of the SOF/N and the golden ratio by calculating the ratio between linear distances and to evaluate the differences between the skulls from both historical periods. In the study, the frequency of the occurrence of the supraorbital notch in the skulls from the Byzantine era was found to be 26.60 % on the right and 13.30 % on the left while it was 14.30 % on the right and 9.52 % on...
Tipo: Journal article
Palavras-chave: Supraorbital foramen; Supraorbital notch; Golden ratio; Byzantine era; Asymmetry; Frontal bone.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000200040

Asymmetries of the Left and Right Temporal Lobes
Provedor de dados: 77
Autores: Boni,R. C; Prosdócimi,F. C; Bonsi,A. B.; Almeida,T. M.; Ribeiro,L. A. M.
Anatomical brain asymmetries are subtle and still little studied in humans. Among all the animals, humans have the most asymmetric brains Crow (2004). The language faculty and handedness are localized on the left side. The objective this paper is to verify whether the temporal lobes are anatomically different. Our sample was composed of 40 post mortem adult brains of both sexes, which were investigated at the Human Anatomy Laboratory of the Nove de Julho University Center in Sao Paulo, Brazil. The brains were fixed in a solution of 5% paraformaldehyde. Three different measurements were taken using a pachimeter (Mitutoyo) and a goniometer (Card) on both hemispheres: Ml - the length of the lateral sulcus; M2 - the distance from the lateral sulcus to the...
Tipo: Journal article
Palavras-chave: Brain; Asymmetry; Temporal Lobe.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000100016

A Comparison of Anatomical Measurements of the Infraorbital Foramen of Skulls of the Modern and Late Byzantine Periods and the Golden Ratio
Provedor de dados: 77
Autores: Bakirci,S; Kafa,I. M; Coskun,I; Buyukuysal,M. C; Barut,C.
The aim of this study was to examine the morphometric characteristics of the infraorbital foramen of skulls of people living in modern society and in the late Byzantine period, to ascertain the symmetry or asymmetry of the two halves of the skulls by measuring the linear distance between various landmarks, to evaluate at the conformity between the infraorbital foramen and the golden ratio by calculating the ratios between these linear distances, and to set out the differences or similarities between the skulls of these different periods. It was found in the study that the morphometric characteristics of the infraorbital foramen in skulls of the modern period were 47.05 % circular, 41.17 % oval and 11.76 % atypical (semilunar and triangular) on the right,...
Tipo: Journal article
Palavras-chave: Infraorbital foramen; Golden ratio; Byzantine period; Asymmetry; Maxilla.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000200057

Asymmetry, Handedness and Auricle Morphometry
Provedor de dados: 77
Autores: Tatlisumak,Ertugrul; Yavuz,Mehmet Sunay; Kutlu,Necip; Asirdizer,Mahmut; Yoleri,Levent; Aslan,Asim.
The aims of this study were to determine various morphometric measurements of auricle, to investigate asymmetry and its relation with handedness in both sexes. Main morphometric measurements of both auricles and hand preferences were determined on 200 male and 200 female healthy university students. All measurements of the auricles were larger in males than the corresponding ones in females and all the differences except earlobe widths were statistically significant. All measurements of left and right auricles were statistically significantly different in both sexes except earlobe length in males, and distance from the highest point of the auricle to the bottom of the intertragic notch and earlobe length in females. Auricle length and distance from the...
Tipo: Journal article
Palavras-chave: Asymmetry; Handedness; Auricle Morphometry; Lateralization; Anthropometry.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000400057

A Note on Business Cycle Non-Linearity in U. S. Consumption
Provedor de dados: 31
Autores: Cook,   Steven.
The recently examined durability-asymmetry hypothesis of Cook (1999) is re-evaluated using the diagnostic tests of time deformation proposed by Stock (1987, 1988). An application of these tests to disaggregated data on U.S. consumers’ expenditure provides further support for this hypothesis, with the findings given an economic interpretation in terms of variables evolving at differing speeds over different phases of the business cycle. Additionally, building upon the studies of Cover (1992), Karras (1996) and Rhee and Rich (1995), recent research by Arden et al. (2000) has shown the relaxation of the assumptions of linearity and symmetry typically employed in macroeconometric models to result in monetary policy having clear asymmetric effects on the...
Tipo: Journal Article
Palavras-chave: Time deformation; Asymmetry; Non-linearity; Consumers’ expenditure; Consumer/Household Economics; C12; E32.
Ano: 2003
URL: http://purl.umn.edu/43990

Trade and Development When Exports Lack Diversification: A Case Study From Malawi
Provedor de dados: 31
Autores: Persaud,   Suresh Chand; Meade,   Birgit Gisela Saager.
Developing countries, particularly those that depend heavily on a small number of agricultural exports, are vulnerable to domestic and international shocks. These countries often have difficulty achieving sustained economic growth. This analysis uses Malawi, a country that earns most of its foreign exchange from tobacco, as a case study of export concentration and heavy exposure to volatility. The econometric results suggest that the decline in Malawi’s gross domestic product (GDP) when tobacco exports are falling is almost three times greater than the increase in GDP when exports are rising. Model-based simulations indicate that variability in tobacco exports leads to slower economic growth because GDP falls by a relatively large amount in response to a...
Tipo: Report
Palavras-chave: Malawi; Tobacco; Export-led growth; Asymmetry; Volatility; Productivity; Trade; Development; Marketing efficiency; Price transmission; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Environmental Economics and Policy; Financial Economics; International Relations/Trade; Production Economics.
Ano: 2009
URL: http://purl.umn.edu/55943

Market Access Asymmetry in Food Trade among Quad Countries
Provedor de dados: 31
Autores: Olper,   Alessandro; Raimondi,   Valentina.
This paper uses a gravity-like structure derived from a monopolistic competition model to measure market access among Canada, USA, Japan and EU – Quad countries – over the 1996-2001 period. We explore the overall asymmetry and 18 food industrial-level asymmetries of bilateral trade openness. Using actual bilateral estimates of tariffs and nontariff barriers, we investigate their role in explaining the trade reduction effect of national borders. A representative estimate of market access shows that higher asymmetries exist in USA, Canada and EU trade with Japan. Quite surprisingly, the last country is always more open than the reverse. Finally, we found that tariffs and NTBs explain a significant part of the border effects and that the NTB role is often...
Tipo: Conference Paper or Presentation
Palavras-chave: Market access; Food trade; Asymmetry; Gravity; QUAD countries; International Relations/Trade; F13; F14; Q17.
Ano: 2005
URL: http://purl.umn.edu/24596

ANÁLISE DA VOLATILIDADE DOS PREÇOS DE BOI GORDO NO ESTADO DE SÃO PAULO: UMA APLICAÇÃO DOS MODELOS GARCH
Provedor de dados: 31
Autores: Silva,   Carlos Alberto Goncalves da.
O presente trabalho teve como objetivo realizar uma análise da volatilidade do retorno dos preços de boi gordo  no Estado de São Paulo; examinando-se dois fatores determinantes, a persistência de choques e assimetrias na volatilidade, por meio da aplicação dos modelos ARCH/GARCH. Os resultados empíricos mostraram reações de persistência e assimetria na volatilidade, ou seja, os choques negativos e positivos têm impactos diferenciados sobre a volatilidade dos retornos dos preços do boi gordo, o que pode ser comprovado pelos modelos EGARCH e TARCH.---------------------------------------------  This paper aims to analyze the volatility process of the return the prices of beef cattle in the State of  São Paulo; examining two factors determinatives, the...
Tipo: Conference Paper or Presentation
Palavras-chave: Boi gordo; Volatilidade; Assimetria; Modelos ARCH/GARCH; Beef cattle; Volatility; Asymmetry; ARCH/GARCH models; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/113360

Analysis of economic issues relating to the dairy sector, with emphasis on price transmission
Provedor de dados: 31
Autores: Popovics,   Peter Andras.
The dramatic decline in consumption after 1990 was an important problem during the analysis of the sector. Even today, consumption is still below the degree that was before the political change, and significantly lags behind the EU level. The importance of this topic is emphasized by the fact that surplus milk could be marketed through the increased domestic consumption; this would create a more stable and calculable situation for farmers. Therefore, I considered it important to reveal what factors and by what shares influence the consumption of milk and dairy products. The relationship, time series and cross-sectional analysis based on national and international databases demonstrate the relationship between the consumption of milk and dairy products and...
Tipo: Thesis or Dissertation
Palavras-chave: Milk production; Dairy sector; Price transmission; Asymmetry; Oligopolistic market structure; Agribusiness; Food Consumption/Nutrition/Food Safety; Production Economics; Productivity Analysis.
Ano: 2008
URL: http://purl.umn.edu/48338

ASYMMETRIC PRICE RELATIONSHIPS IN THE U.S. BROILER INDUSTRY
Provedor de dados: 31
Autores: Bernard,   John C.; Willett,   Lois Schertz.
This study presents a testing methodology to analyze potential price asymmetries among the farm, wholesale, and retail levels of the U.S. broiler industry. Lag length, direction of causality and power of the integrators in the industry have allowed the wholesale price to become the center, causal price in the market. Asymmetric price transmissions, however, are limited. While downward movements in the wholesale price are passed on more fully to growers than increases in the wholesale price, only consumers in the North Central region of the U.S. share a larger portion of wholesalers' price increases than price decreases.
Tipo: Journal Article
Palavras-chave: Asymmetry; Broilers; Concentration; Granger causality; Price transmission; Demand and Price Analysis; Livestock Production/Industries.
Ano: 1996
URL: http://purl.umn.edu/15125

Asymmetry, Risk, and Correlation Dynamics in the U.S. Fiber Market
Provedor de dados: 31
Autores: Fadiga,   Mohamadou L.; Misra,   Sukant K.
This study looked at the dynamics of conditional correlations and hedging strategies in the US main cotton producing regions. A two-step procedure was utilized to model, estimate, and analyze volatility, conditional correlations, and the optimal hedge ratios using spot prices in the Delta, Southeast, Southern Plains, and the Southwest regions and the New York commodity exchanges December futures contracts.  The results indicate that volatilities in most of the regions are asymmetric and persistent. The derived conditional correlations and the optimal hedging ratios are dynamic although they do not have unit root. Moreover, the changes in agricultural policies altered the dynamics of correlations and producers' hedging strategies in the Delta, Southeast,...
Tipo: Conference Paper or Presentation
Palavras-chave: Cotton; Volatility; Asymmetry; Multivariate conditional correlations; Optimal; Risk and Uncertainty.
Ano: 2005
URL: http://purl.umn.edu/19459

Groundwater Use in Asymmetric Aquifer under Incomplete Information
Provedor de dados: 31
Autores: Saak,   Alexander E.
This paper analyzes a game theoretic model of groundwater extraction in an asymmetric two-cell aquifer under incomplete information about the extent to which the local stock of groundwater depends on the extraction histories at nearby wells.  A novel assumption is that the elevation of the bottom of the aquifer differs across, otherwise identical, cells. Asymmetry creates a strategic advantage (disadvantage) for the user in the deep (shallow) cell in “stealing” neighbor’s water.  The user with a larger initial stock actually benefits from the commonality of groundwater provided that the asymmetry is not too small or too great.  Assuming that the asymmetry between users is sufficiently large, better informed, non-cooperative users attain a higher joint...
Tipo: Conference Paper or Presentation
Palavras-chave: Common property resource; Asymmetry; Groundwater; Information; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/6545

Modeling Pork Supply Response and Price Volatility: The Case of Greece
Provedor de dados: 31
Autores: Rezitis,   Anthony N.; Stavropoulos,   Konstantinos S.
This paper examines the supply response of the Greek pork market. A GARCH process is used to estimate expected price and price volatility, while price and supply equations are estimated jointly. In addition to the standard GARCH model, several different symmetric, asymmetric, and nonlinear GARCH models are estimated. The empirical results indicate that among the estimated GARCH models, the quadratic NAGARCH model seems to better describe producers’ price volatility, which was found to be an important risk factor of the supply response function of the Greek pork market. Furthermore, the empirical findings show that feed price is an important cost factor of the supply response function and that high uncertainty restricts the expansion of the Greek pork...
Tipo: Journal Article
Palavras-chave: Asymmetry; GARCH; Pork supply; Price volatility; Agribusiness; Demand and Price Analysis; International Development; Risk and Uncertainty; C510; D200; Q110.
Ano: 2009
URL: http://purl.umn.edu/48764

Effect of Egg Weights on Hatching Results, Broiler Performance and Some Stress Parameters
Provedor de dados: 89
Autores: Duman,M; Şekeroğlu,A.
ABSTRACT The present study was conducted to investigate the effect of hatching egg weight of broiler parent stocks on hatching results, chick performance, carcass characteristics, internal organ weights and some blood stress parameters. Eggs were divided into 3 egg weight groups (55.0 to 60.0 g (light), 60.1 to 65.0 g (medium) and 65.1 to 70.0 g (heavy)) for the experiments. After incubation, mixed-gender broiler chicks from the hatcher were placed into 27 grower pens (2x1 m) with 9 replications for 3 weight groups by using randomized block design. Each pen had 25 broiler chicks. Therefore, 225 chicks were used for each group and 675 chicks in total. The experiment was designed with nine replicates. Chi-square test, variance analysis test and Duncan...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asymmetry; Chicken; Hatchability traits; Growing performance; Tonic immobility.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000200255

Broiler walking ability and toe asymmetry under harsh rearing conditions
Provedor de dados: 89
Autores: Baracho,MS; Nääs,IA; Bueno,LGF; Nascimento,GR; Moura,DJ.
Morphological asymmetry has been described as a potential broiler welfare indicator, for interpreting the birds' ability to cope with the challenges that may affect its growth. The objective of this study was to evaluate the use of morphological asymmetry data to estimate broiler walking ability and welfare.dBroilers werefed diets supplemented or not with vitamin D. Toes were measured when birds were 42 and 49 days old using digital caliper.the left and right sides of the following four bilateral traits (tarsometatarsus length, outer toe length, mid toe length, and back toe length) were measured twice on intact alive birds by two different researcherh. Data from right and left sides were compared in the two treatments using the Student t-test, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asymmetry; Welfare; Poultry.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000300009

Residence advantage in heterospecific territorial disputes of Erythrodiplax Brauer species (Odonata, Libellulidae)
Provedor de dados: 92
Autores: Resende,Daniela Chaves.
Residence advantage in heterospecific territorial disputes of Erythrodiplax Brauer species (Odonata, Libellulidae). Territories are the outcome of interactions determining where and how long individuals settle. To odonate species, aggressive disputes are not so common since the outcome can be predetermined by advantages such as residency, age, and body size. However, it is possible to predict that at heterospecific disputes, larger body-sized or more aggressive species have some profits overcoming these individual advantages, generating patterns of species hierarchy. Here, I studied the aggressiveness of five Erythrodiplax species (Odonata, Libellulidae) during territorial disputes and verified if larger body-sized species are more aggressive than smaller...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asymmetry; Hierarchy; Interspecific competition; Territoriality.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262010000100014

Morphometric analysis of the phrenic nerve in male and female Wistar-Kyoto (WKY) and spontaneously hypertensive rats (SHR)
Provedor de dados: 56
Autores: Rodrigues,A.R.; Ferreira,R.S.; Salgado,H.C.; Fazan,V.P.S.
Ventilatory differences between rat strains and genders have been described but the morphology of the phrenic nerve has not been investigated in spontaneously hypertensive (SHR) and normotensive Wistar-Kyoto (WKY) rats. A descriptive and morphometric study of the phrenic nerves of male (N = 8) and female (N = 9) SHR, and male (N = 5) and female (N = 6) WKY is presented. After arterial pressure and heart rate recordings, the phrenic nerves of 20-week-old animals were prepared for epoxy resin embedding and light microscopy. Morphometric analysis performed with the aid of computer software that took into consideration the fascicle area and diameter, as well as myelinated fiber profile and Schwann cell nucleus number per area. Phrenic nerves were generally...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phrenic nerve; Sexual dimorphism; Morphometry; Spontaneously hypertensive rats; Wistar-Kyoto rats; Asymmetry.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000600012