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Efeito da sazonalidade climática na ocorrência de sistomas respiratórios em indivíduos de uma cidade de clima tropical; Effect of the climate seasonality on the occurrence of respiratory symptoms in subjects of a tropical city

SILVA JÚNIOR, José Laerte Rodrigues da
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Medicina Tropical; Medicina Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Medicina Tropical; Medicina
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
26.54%
Objectives: To evaluate the effect of the climate seasonality on the occurrence of respiratory symptoms in patients attending a primary health unit in a tropical city. Methods: We conducted a cross-sectional study on subjects attending an out-patient primary health unit in relation with meteorological data collected daily. During one year, forty-four cross-sectional observations categorized by season were made. The observations were chosen randomly, in twelve-hour intervals (7am to 7pm). Analysis of variance was used to compare means across seasons. Pairwise correlation was conducted to verify the association between the number of patients and each meteorological variable. A model of autoregressive moving average with exogenous variables was conducted to evaluate the ability of the meteorological variables to predict the proportions of subjects with respiratory symptoms on each season. Results: Among the 3,354 subjects enrolled, 14.6% had respiratory symptoms. The temperature variation was not enough to change the number of individuals with respiratory symptoms, however there was an increase of subjects with respiratory symptoms coinciding with low levels of humidity during winter, with a statistically significant difference between seasons (p=0...

Influência dos fatores ambientais sobre a concentração de compostos fenólicos nas folhas e na casca do caule de Lafoensia pacari A. St.-Hil. (Lythraceae); Influence of environmental factors on the concentration of phenolic compounds in leaves and stem bark of A. Lafoensia pacari St.-Hil. (Lythraceae)

SAMPAIO, Bruno Leite
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciências Farmacêuticas; Ciências da Saúde - Farmácia Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciências Farmacêuticas; Ciências da Saúde - Farmácia
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
26.54%
In Brazil, the cerrado is holding out for 20 to 50% of plant species in the country, contributing to research on natural products. Among the medicinal plants of the cerrado, Lafoensia pacari A. St.-Hil., known as dedaleiro or pacari is widely used as an antipyretic, healing, antiinflammatory, antidiarrheal, in gastritis and cancer. Studies have shown that extracts of L. pacari has antioxidant, anti-inflammatory, analgesic, antimicrobial and antidyspeptic activities. Among the groups of metabolites identified in L. pacari, stand out polyphenols, such as tannins and flavonoids, related to the its pharmacological activities. Due to the pharmacological importance of L. pacari, there is need for studies that may contribute to the standardization of plant parts as plant drug. Studies on the influence of environmental factors on production of the major groups of secondary metabolites of pacari are important because they contribute data to the cultivation and harvest, and to establish quantitative parameters of the plant drug metabolites. This study aimed to evaluate the influence of environmental factors like temperature, precipitation, mineral nutrients from soil and plant tissues on the concentration of secondary compounds in the leaves and bark of pacari. By spectrophotometric methods were determined levels of total phenols...

Ambiência, características uterinas ovarianas, produção e composição do leite de primíparas da raça Holandesa (pc) criadas no bioma Cerrado; Ambience, uterine and ovarian characteristics, production and milk composition of primpiparous Holstein heifers (PC) created in teh Brazilian savannah

Bilego, Ubirajara Oliveira
Fonte: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciência Animal (EVZ); Escola de Veterinária e Zootecnia - EVZ (RG) Publicador: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciência Animal (EVZ); Escola de Veterinária e Zootecnia - EVZ (RG)
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
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The objective of this study was to evaluate the effects of environmental characteristics on production and milk composition and reproductive activity of primiparous Holstein (PC) race. The experiments were carried out in the Rio whiting, located in Rio Verde, Goiás state Southwest region of the city has two well-defined periods, the rainy season (PCh) (October to April) and dry (PS) (May to September). In the first experiment aimed to evaluate environmental factors such as temperature, relative humidity (RH) and rainfall to estimate Temperature and Humidity Index (THI) in two seasons. The experimental period included the PW during the months of January to April 2011 and the PS to the months of May to August 2012. Through the climate data we calculated the (UTI) by the formula described in NRC (1971). The results showed differences in the variables, minimum, average temperature RH, precipitation and ITU, with higher values for PW. In the second experiment, we used 72 primiparous cows of Holstein breed (PC), aged 24 to 30 months, divided into two experimental groups, with 36 in the PS group and 36 in the PW group. We evaluated the yield and the content of fat, protein, total solids (EST) and defatted (ESD) and milk urea nitrogen (MUN). The experimental design was completely randomized in two periods of measurements (rainy and dry season). There were no differences between the dry and rainy periods for milk production. The values of proximate composition of milk were all different between periods. Values of fat...

Sazonalidade da ração essencial mínima nas grandes regiões metropolitanas brasileiras; Seasonality analysis of the minimal essential ration in the main brazilian metropolitan regions

Fonte: UNIVERSIDADE FEDERAL DE LAVRAS; DEX - Programa de Pós-graduação; UFLA; BRASIL Publicador: UNIVERSIDADE FEDERAL DE LAVRAS; DEX - Programa de Pós-graduação; UFLA; BRASIL
Tipo: Tese de Doutorado
PT_BR
Relevância na Pesquisa
26.54%

Mitigating Seasonal Hunger with Microfinance in Bangladesh : How Does a Flexible Programme Compare with the Regular Ones?

Khandker, Shahidur R.; Khalily, M.A. Baqui; Samad, Hussain A.
Fonte: Taylor and Francis Publicador: Taylor and Francis
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
26.54%
Microfinance institutions, often criticised for inadequately addressing seasonality and hard-core poverty, have begun to introduce innovative programs designed to tackle both the concerns. One such program in Bangladesh is the Programmed Initiatives for Monga Eradication (PRIME). PRIME exclusively targets the ultra-poor, especially in the country’s northwest region, and offers both production and consumption loans with a flexible loan repayment schedule, and other services. This article assesses the effectiveness of PRIME and regular microfinance programs in reducing seasonal hardship. Findings of this article suggest that PRIME is better targeted than regular microfinance programs and also performs better in mitigating seasonal starvation.

The limit to wheat water-use efficiency in eastern Australia. II. Influence of rainfall patterns

Sadras, V.; Rodriguez, D.
Fonte: C S I R O Publishing Publicador: C S I R O Publishing
Tipo: Artigo de Revista Científica
Publicado em //2007 EN
Relevância na Pesquisa
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We investigated the influence of rainfall patterns on the water-use efficiency of wheat in a transect between Horsham (36°S) and Emerald (23°S) in eastern Australia. Water-use efficiency was defined in terms of biomass and transpiration, WUEB/T, and grain yield and evapotranspiration, WUEY/ET. Our working hypothesis is that latitudinal trends in WUEY/ET of water-limited crops are the complex result of southward increasing WUEB/T and soil evaporation, and season-dependent trends in harvest index. Our approach included: (a) analysis of long-term records to establish latitudinal gradients of amount, seasonality, and size-structure of rainfall; and (b) modelling wheat development, growth, yield, water budget components, and derived variables including WUEB/T and WUEY/ET. Annual median rainfall declined from around 600 mm in northern locations to 380 mm in the south. Median seasonal rain (from sowing to harvest) doubled between Emerald and Horsham, whereas median off-season rainfall (harvest to sowing) ranged from 460 mm at Emerald to 156 mm at Horsham. The contribution of small events (≤ 5 mm) to seasonal rainfall was negligible at Emerald (median 15 mm) and substantial at Horsham (105 mm). Power law coefficients (τ), i.e. the slopes of the regression between size and number of events in a log-log scale...

Artificial nest predation rates vary among habitats in the Australian monsoon tropics

Noske, R.; Fischer, S.; Brook, B.
Fonte: Blackwell Science Asia Publicador: Blackwell Science Asia
Tipo: Artigo de Revista Científica
Publicado em //2008 EN
Relevância na Pesquisa
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Rates of nest predation have frequently been shown to differ between fragmented and unfragmented habitats, but have rarely been compared among natural habitats in the same geographic region. In this study, artificial nests of two types (open cup and domed) were placed in four habitats (mangroves, monsoon rainforests, eucalypt woodlands and paperbark swamps) over 12 months in three localities near Darwin in the Australian monsoon tropics to determine the effects of habitat, season and nest type on the rate of nest predation. A quail egg and a similarly coloured plasticine egg were placed in each nest. Habitat had a strong effect on nest predation rates, with nests in mangroves experiencing predation rates more than four times higher than those in eucalypt woodlands and paperbark swamps. Despite the strong rainfall seasonality of the region, there was no consistent seasonal variation in nest predation rates. Nest type also had little influence on predation rates, except in paperbark swamps where open cup nests suffered a higher predation rate than domed nests. The study indicates that generalised nest predation rates for tropical regions, even for small areas (e.g. <17 km radius), might overlook substantial variation between habitats. Such variation confounds purported differences in nest predation rates between tropical and temperate regions.; The original publication can be found at www.springerlink.com

Optimisation of pump operations in water distribution systems taking into account the seasonality of the demand

Marchi, A.; Simpson, A.R.; Thyer, M.A.; Sutanto, S.; Do, N.C.
Fonte: Engineers Australia; Barton, A.C.T. Publicador: Engineers Australia; Barton, A.C.T.
Tipo: Conference paper
Publicado em //2012 EN
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Although the optimisation of pump operations in water distribution systems has previously been researched considering different types of pumps and controls, the variation of the water demand throughout the year and its impact on pumping have never been considered explicitly. This paper analyses two different demand patterns, characterized by a different degree of variability throughout the year, and their effects on pumping operations. A case study is presented that considers different pump types (fixed speed pumps and variable speed pumps) and the different monthly demand patterns. The comparison of results shows that the optimisation of variable speed pumps can lead to more effective pump controls, especially when the demand variability is larger. In addition, pump operations are optimised taking into account a seasonal temporal resolution: results show up to 12.5% in possible savings, highlighting the importance of considering seasonality in the optimisation of pump operations.; Angela Marchi, Angus R. Simpson, Mark A. Thyer, Samuel Sutanto, Nhu Cuong Do

Financial contracts on electricity in the Nordic power market; Bewertung von Derivaten im skandinavischen Elektrizitätsmarkt

Kispert, Wolfgang
Fonte: Universidade de Tubinga Publicador: Universidade de Tubinga
Tipo: Dissertação
EN
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Already before the EU Directive 96/92/EG was passed in 1996, some countries in the EU had started their liberalisation process for energy markets. So, in 1991, Norway established a national power market that in 1996 turned into the multinational power exchange Nord Pool, including all Nordic countries today. The fact that electricity cannot be stored efficiently and must be generated and consumed at the same time has several consequences: The spot price process exhibits characteristics like seasonal regularities, mean reversion and price jumps or spikes. Furthermore, a replication of futures and forward contracts with spot contracts is not possible, the relevant pricing equation for forward contracts is not valid any more. This enables us to estimate parameters implicitly, using futures and forward contracts. One purpose in this work is the employment and further development of already existing models for electricity. A second purpose is to adjust and extend recently proposed models for stock returns for the electricity market. Duffie, Pan and Singleton (2000) introduce stochastic processes with stochastic volatility and jumps. The jumps do not only occur in the price process, but also in the volatility process. The jump sizes in the volatility process are exponentially distributed. We extend this model class further by allowing the jump sizes in the volatility process to follow a Gamma-distribution. This is a generalization of the former model class...

Seasonality of Vegetation Fires in Africa from Remote Sensing Data and Application to a Global Chemistry Model

COOKE W.f.; KOFFI Brigitte; GREGOIRE Jean-marie
Fonte: Centro Comum de Pesquisa da Comissão Européia Publicador: Centro Comum de Pesquisa da Comissão Européia
Tipo: Articles in Journals Formato: Printed
ENG
Relevância na Pesquisa
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This paper sets out to show the potential use of remote sensing of active vegetation fires for continental to global scale modelling of biomass burning studies. It focuses on the analysis of the seasonality of biomass burning for the Africa continent, as derived from NOAA-AVHRR-GAC-5km satellite data.; JRC.(EI)-Environment Institute

Seasonality of PCDD/Fs in Ambient Air of Malopolska Region, Southern Poland

UMLAUF Gunther; CHRISTOPH Helmut Eugen; MARIANI Giulio; EISENREICH Steven; PARADIZ Bostjan; VIVES RUBIO Ingrid
Fonte: SPRINGER HEIDELBERG Publicador: SPRINGER HEIDELBERG
Tipo: Articles in Journals Formato: Printed
ENG
Relevância na Pesquisa
26.54%
Purpose: The aim of the study was to identify the impact PCDD/F emission sources on ambient air concentrations in Malopolska Region, southern Poland. Three sites were selected: city center of Krakow (Aleje), an industrial area (Nova Huta) and a rural site (Zakopane). In order to investigate the annual variations of PCDD/F sources, summer and winter time samples were taken. Sampling and analytical methods: Ambient air particulate matter (PM10) was collected using an Anderson High Volume sampler during June and December 2002 in the three mentioned sites. Analysis of PCDD/Fs was based on isotope dilution using high resolution gas chromatography-high resolution mass spectrometry (HRGC-HRMS) for quantification. Results: Total concentrations of 2,3,7,8-PCDD/Fs in air particulate phase from Malopolska region ranged from 0.6 to 37 pg m-3 (0.04-3.2 pg WHO98-TEQ m-3, 0.037-2.9 pg I-TEQ m-3). Higher PCDD/F concentrations were measured at all three sites during winter. A linear correlation among PCDD/F concentrations, B(a)P and PM10 concentrations was found in Aleje and Zakopane, which suggested that all compounds were originating from the same source, solid fuel domestic heating. Instead, PCDD/F levels in Nova Huta did not correlate with the seasonality of B(a)P or PM10 levels and 2...

Seasonality and freezability vs routine parameters in stallion semen

Rodríguez, H.; Bustos-Obregón, E.
Fonte: Murcia : F. Hernández Publicador: Murcia : F. Hernández
Tipo: Artigo de Revista Científica Formato: application/pdf
ENG
Relevância na Pesquisa
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The fertilizing ability of stallion semen was analyzed using fresh and frozen samples, obtained before (June-July) or during (October-November) the breeding season. Thirty ejaculates obtained from 4 stallions, were used. The analysis comprises routine seminogram; ATP concentration (Comhaire et al., 1983); subjective and objective motility and sperm velocity (Makler, 1980). Freezing was done following the technique of Martin et al. (1979). Sperm velocity, ATP content and objective motility in ejaculates of subjective motility >50% show values of 14.010.84 ym S-l; 4.8f 2 . 7 1~O - ~ Man d 54.0I7.4%, respectively. For ejaculates with subjective motility ~ 5 0 %the~se values are 8.412.4; 0.74f 0 . 3 6 1~ 0 - 7 a~n d 27.0+0.8%. No significant changes in these characteristics were elicited by freezing, though ATP content dropped to 50% after thawing. These characteristics are highly associated between them (pc0.05) and with some conventional parameters of the routine seminogram such as sperm motility, count, total spermatozoal number and morphology. Additionally, sperm chromatin packing was analyzed by decondensing sperm nuclei using a thiol reducing agent. This parameter was not modified by freezing and it may depend on prolonged epididymal sperm storage during the non-breeding season. Epididymal maturation then results in an excessive disulphur bridging in sperm basic proteins...

Nonparametric estimation of time varying parameters under shape restrictions

Orbe Mandaluniz, Susan; Ferreira García, Eva; Rodríguez Poo, Juan Manuel
Fonte: Universidad del País Vasco Publicador: Universidad del País Vasco
Tipo: info:eu-repo/semantics/article; publishedVersion
ENG
Relevância na Pesquisa
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In this paper we propose a new method to estimate nonparametrically a time varying parameter model when some qualitative information from outside data (e.g. seasonality) is available. In this framework we make two main contributions. First, the resulting estimator is shown to belong to the class of generalized ridge estimators and under some conditions its rate of convergence is optimal within its smoothness class. Furthermore, if the outside data information is fullfilled by the underlying model, the estimator shows efficiency gains in small sample sizes. Second, for the implementation process, since the estimation procedure envolves the computation of the inverse of a high order matrix we provide an algorithm that avoids this computation and, also, a data-driven method is derived to select the control parameters. The practical performance of the method is demonstrated in a simulation study and in an application to the demand of soft drinks in Canada.

Growth at moulth, intermoult period and moulting seasonality of the spider crab "Maja brachydactyla" : combining information from mark-recapture and experimental studies

Corgos López-Prado, Antonio; Sampedro Pastor, María Paz; González Gurriarán, Eduardo; Freire, Juan (1966-)
Fonte: Universidade da Corunha Publicador: Universidade da Corunha
Tipo: Trabalho em Andamento
ENG
Relevância na Pesquisa
26.54%
An analysis of growth at moult (for both the prepubertal and terminal moults), moulting seasonality and the intermoult period in the spider crab Maja squinado in the Ría de A Coruña (NW Spain) was carried out based on a mark-recapture experiment. Crabs between 70 and 130 mm carapace length (CL) undergo a mean increase at moult of 32.4% from their pre-moult size. Generalised Linear Models (GLMs) were used to construct growth models, employing a combination of information from the mark-recapture study and other previous studies performed in both laboratory and extensive culture, to estimate the effects of the biological variables and the study method. No differences were found in the growth rate between males and females. However, the effects of the study method, the premoult CL and the interaction between them were significant. The smallest-sized crabs undergo a greater increase in size in the laboratory and culture studies, while the largest individuals undergo greater growth in the field. The mean intermoult period estimated for prepubertal moults in the field ranged from 50 to 86 days, which Corgos et al., GROWTH AT MOULT OF MAJA BRACHYDACTYLA is similar to the 84.7 days observed in the laboratory study. The prepubertal moults occurred primarily in spring and autumn in the field...

Interactions of the fishery of the spider crab Maja squinado with mating, reproductive biology and migrations

Freire, Juan (1966-); Fernández Rodríguez, Luis José; González Gurriarán, Eduardo
Fonte: Universidade da Corunha Publicador: Universidade da Corunha
Tipo: Trabalho em Andamento
ENG
Relevância na Pesquisa
26.54%
In this paper different aspects of the fishery and life history of the spider crab Maja squinado in southern Galicia (NW Spain) are analyzed to evaluate the potential effects of the fishery on the sperm limitation of the reproductive effort (egg production) of the population. Juveniles of the spider crab inhabit shallow waters, where they carry out a terminal moult in August-September, attaining sexual maturity when they are 2+ years old. A short time after the terminal moult (October-November), adults migrate to deeper waters (up to 100 m), where mating occurs (January-February). Field and laboratory data show that multiple matings and sperm storage in female seminal receptacles occur, indicating that females are able to fertilize multiple broods during the annual breeding cycle using stored sperm. The spider crab is the target of a tangle-net fishery, characterized by a very high fishing effort similar for both sexes. The fishing season is from November-December until May-June and is mostly dependent on migrating animals. Data from catch composition (percentage of recent recruits at the beginning of the season), recaptures from the fishery of females tagged with ultrasonic transmitters and electronic archival tags, and CPUE trends over the course of the fishing season (Leslie analyses of stock depletion) indicate that more than 90% of postpubertal (primiparous) adults are caught during the fishing season. The fishery is almost exclusively dependent on the autumn recruitment of the annual cohort of primiparous adults. Most of the catches are made in autumn and early winter...

Estimating the system order by subspace methods

García-Hiernaux, Alfredo; Casals, José; Jerez, Miguel
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: Trabalho em Andamento Formato: application/pdf
Publicado em /01/2007 ENG; ENG
Relevância na Pesquisa
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This paper discusses how to determine the order of a state-space model. To do so, we start by revising existing approaches and find in them three basic shortcomings: i) some of them have a poor performance in short samples, ii) most of them are not robust and iii) none of them can accommodate seasonality. We tackle the first two issues by proposing new and refined criteria. The third issue is dealt with by decomposing the system into regular and seasonal sub-systems. The performance of all the procedures considered is analyzed through Monte Carlo simulations.

Extrafloral nectary morphology and the role of environmental constraints in shaping its traits in a common Cerrado shrub (Maprounea brasiliensis A. St.-Hill: Euphorbiaceae)

Delgado, Marina Neves; Bao, Sonia Nair; Amaral, Lourdes I. V.; Rossatto, Davi Rodrigo; Morais, Helena Castanheira de
Fonte: Soc Botanica Sao Paulo Publicador: Soc Botanica Sao Paulo
Tipo: Artigo de Revista Científica Formato: 495-504
ENG
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); This study aimed to elucidate the anatomy and morphology of extrafloral nectaries (EFNs) in Maprounea brasiliensis and whether environmental factors influence their traits of production and morphology. For this reason, we sampled leaves from individuals subjected to distinct fire and water regimes, and the anatomy and ultrastructures of EFNs as well as the chemical constitution of nectar were analyzed. EFN nectar production was associated with immature and recently expanded leaves. EFNs originate from the epidermis. At the end of ontogeny, secretory cells are surrounded by three or more layers of cells with secondary and lignified walls, isolating the EFN of vascular tissue. The ultrastructural analysis revealed mature EFNs with secretory activity. The experiments showed that EFN production was not influenced by the presence of frequent fires. However, during the rainy season, new produced leaves had nectaries in greater quantity and diameter than leaves produced during the dry season. The anatomical and ultrastructural changes demonstrated that nectar production is strongly influenced by the age of the nectaries which influence ant attendance to EFN since no ants were observed on leaves that did not secrete nectar. The seasonality experiment confirmed that EFNs of M. brasiliensis are resource dependent and evolutionary programed to appear in elevated number during the rainy season.

Disability Income Insurance - The Australian Experience 1980-2001

Service, David
Fonte: Universidade Nacional da Austrália Publicador: Universidade Nacional da Austrália
Tipo: Thesis (PhD); Doctor of Philosophy (PhD)
EN
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This thesis examines the experience of disability income insurance in Australia from 1980 to 2001. The data underlying the work was generously provided by the Institute of Actuaries of Australia which has collected data from the major companies which have written this business since 1976. The focus in this work is on the claims behaviour of those who have been insured and the implications to be drawn from the observations about that behaviour. This information is intended to be valuable to individual companies as they seek to make decisions about their pricing, underwriting and claims management so as to ensure adequate profitability of this line of business. The work demonstrates the following key conclusions. There have been very radical changes in the characteristics of the business over the period and in the resulting experience. In particular, the claim termination experience has deteriorated dramatically with average claim durations now around twice that at the start of the period, the structure of IAD8993 is no longer representative of the aggregate industry experience. This is particularly so in respect to incidence, where only one of the six characteristics included has its 'shape' confirmed by the experience. The other five have statistically significant evidence that their 'shape' is not consistent with the experience. For terminations three of the six are confirmed. Many of the additional characteristics examined demonstrate that they are significant predictors of experience. In respect to incidence six of the eight examined were significant. In respect to terminations only two of the eight were significant. There is a material element of seasonality in respect to both incidence and terminations. While the Australian experience is materially better than the corresponding USA experience the worsening experience for medical occupations in the USA should be taken as a warning to Australia of the potential which exists in this occupation subclass. There is a serious body of circumstantial evidence supporting the hypothesis that the experience of disability income insurance is significantly influenced by 'state of mind' rather than 'state of body'.; yes

Ecologia alimentar de aves insetívoras de um fragmento de mata decídua do extremo norte da Mata Atlântica

Souto, Glauber Henrique Borges de Oliveira
Fonte: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Ciências Biológicas; Biodiversidade; Biologia Estrutural e Funcional. Publicador: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Ciências Biológicas; Biodiversidade; Biologia Estrutural e Funcional.
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
26.54%
The diet study of birds has contributed historically as a model for use to understanding ecological patterns and strategies used by several other groups of vertebrates, which are observed in season patterns and temporal availability of resources, and other. This study has as objective generate information concerning the diet of insectivorous birds during rainy season and dry season, as well as analyze Index food importance, niche overlap, niche breadth, electivity, and seasonal availability of prey. The study was conducted in a fragment of about 270 ha (center coordinates and 5 º 53'S 35 ° 23'W). The sampling of birds occurred between March 2008 and December 2009 in three pre-established trails. Catches of birds were performed using 10 mist nets placed in line, where each trails was sampled once a month. Samples of pellets were obtained by means of tartar emetic. Sampling of availability of prey occurred between February 2009 to December 2009. We used two methods of sampling (pitfall traps and Shake cloths). We captured 269 individuals of 21 species of insectivorous birds. We collected 4116 invertebrates of which 3259 in the rainy season and 857 in the dry season. We obtained 174 samples stomach, where 10 species were exclusively insectivorous diet...

Seasonality Role on the Phenolics from Cultivated Baccharis dracunculifolia

SOUSA, Joao Paulo B. de; LEITE, Mateus F.; JORGE, Renata F.; RESENDE, Dimas O.; SILVA FILHO, Ademar A. da; FURTADO, Niege A. J. C.; SOARES, Ademilson E. E.; SPADARO, Augusto C. C.; MAGALHAES, Pedro Melillo de; BASTOS, Jairo K.
Fonte: HINDAWI PUBLISHING CORPORATION Publicador: HINDAWI PUBLISHING CORPORATION
Tipo: Artigo de Revista Científica
ENG
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Baccharis dracunculifolia is the source of Brazilian green propolis (BGP). Considering the broad spectrum of biological activities attributed to green proplis, B. dracunculifolia has a great potential for the development of new cosmetic and pharmaceutical products. In this work, the cultivation of 10 different populations of native B. dracunculifolia had been undertaken aiming to determine the role of seasonality on its phenolic compounds. For this purpose, fruits of this plant were collected from populations of 10 different regions, and 100 individuals of each population were cultivated in an experimental area of 1800 m(2). With respect to cultivation, the yields of dry plant, essential oil and crude extract were measured monthly resulting in mean values of 399 +/- 80 g, 0.6 +/- 0.1% and 20 +/- 4%, respectively. The HPLC analysis allowed detecting seven phenolic compounds: caffeic acid, ferulic acid, aromadendrin-4'-methyl ether (AME), isosakuranetin, artepillin C, baccharin and 2-dimethyl-6-carboxyethenyl-2H-1-benzopyran acid, which were the major ones throughout the 1-year monthly analysis. Caffeic acid was detected in all cultivated populations with mean of 4.0%. AME displayed the wide variation in relation to other compounds showing means values of 0.65 +/- 0.13% at last quarter. Isosakuranetin and artepillin C showed increasing concentrations with values between 0% and 1.4% and 0% and 1.09%...