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Search Results: 1 - 10 of 464007 matches for " Maria M. Romeiras "
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Biodiversity Assessment of Sugar Beet Species and Its Wild Relatives: Linking Ecological Data with New Genetic Approaches  [PDF]
Filipa Monteiro, Maria M. Romeiras, Dora Batista, Maria Cristina Duarte
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.48A003
Abstract:

The value of crop wild relatives has long been acknowledged and this wild resource has been used to improve crop performance with clear economic benefits. Sugar beet (Beta vulgaris subsp. vulgaris) is the most economically valuable crop species in the order Caryophyllales, B. vulgaris subsp. maritima being the ancestor of the cultivated beets. The wild species of the genus Beta s.l. are commonly found in coastal areas of Europe and Mediterranean Region, where a rich genetic heritage still exists. Broadening the genetic base of sugar beet by introgression with wild relatives is a growing need regarding the maintenance of ecologically important traits. Since wild relatives have adapted to specific habitats, they constitute an important source of novel traits for the beet breeding pool. So, we conducted a broader research project aiming to delimit taxa and identify priority locations to establish genetic reserves of the wild Beta species occurring in Portugal (Western Iberian Peninsula). The aim of this study was: 1) to identify and characterize the main habitats of these wild Beta species; and 2) to present a review of some genetic tools available for future application in sugar beet breeding. In this review, we have focused on EcoTILLING as a molecular tool to assess DNA polymer

Medicinal Plants Used to Treat Neurological Disorders in West Africa: A Case Study with Guinea-Bissau Flora  [PDF]
Maria M. Romeiras, Maria Cristina Duarte, Bucar Indjai, Luís Catarino
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.327122
Abstract: The sub-Saharan region holds a wide variety of indigenous plant species, still offering the possibility to discover very interesting new natural products with potential therapeutic value. Most of the African population depends on traditional medicine for primary health care, however, neurological disorders are often not considered as common diseases and many people with mental illnesses, like epilepsy, are severely affected by health-related stigma and discrimination. Epilepsy is the most common serious chronic brain disorder, estimated to affect at least 10 million people in Africa. Guinea-Bissau is located in West Africa, and its population is mainly rural with very few health services available. Since the earliest times, Guinea-Bissau flora has constituted the main source of materials used in folk medicine and the local population, who is well versed in the uses of these plants and their properties. The aim of this study was to document the existing knowledge and practices related to the treatment of neurological disorders, namely epilepsy and seizures, in Guinea-Bissau and in other West African countries. The results presented from this study provide information not only on the specific plants used to treat neurological disorders, but also on social knowledge brought in by various ethnic groups, each one having its own culture, beliefs and ways of nature appropriation. Taking into account the existing knowledge on the medicinal properties of plants for treatment of neurologic disorders, it is believed that research in the areas of ethnomedicine and ethnopharmacology in Guinea-Bissau can bring promising results capable of adding value to the very rich natural resources of this country of West Africa.
Ethnobotanical survey in Canhane village, district of Massingir, Mozambique: medicinal plants and traditional knowledge
Ana Ribeiro, Maria M Romeiras, Jo?o Tavares, Maria T Faria
Journal of Ethnobiology and Ethnomedicine , 2010, DOI: 10.1186/1746-4269-6-33
Abstract: In order to gather information about indigenous medicinal plants and to maximize the collection of local knowledge, eleven informants were selected taking into account the dimension of the site and the fact that the vegetation presents a great homogeneity. The data were collected through intensive structured and semi-structured interviews performed during field research. Taxonomical identification of plant species was based on field observations and herbarium collections.A total of 53 plant species have been reported, which were used to treat 50 different human health problems. More than half of the species were used for stomach and intestine related disturbances (including major diseases such as diarrhea and dysentery). Additionally, four species with therapeutic applications were reported for the first time, whose potential can further be exploited. The great majority of the identified species was also associated with beliefs and myths and/or used as food. In general, the community was conscientious and motivated about conservational issues and has adopted measures for the rational use of medicinal plants.The ethnomedicinal use of plant species was documented in the Canhane village. The local community had a rich ethnobotanical knowledge and adopted sound management conservation practices. The data compiled in this study show the social importance of the surveyed plants being a contribution to the documentation of PGR at the national and regional level.In ancient times, medicinal plants have been used all over the world as unique sources of medicines and may constitute the most common human use of biodiversity [1,2]. According to the World Health Organization, 80% of people in developing countries still depend on local medicinal plants to fulfill their primary health needs [3]. Besides that, there is a global consensus on the benefits of phytopharmacy and at present medicinal plants occupy a key position in plant research and medicine. These facts associated with
On the dispersion of two coexisting nongyrotropic ion species
A. L. Brinca,U. Motschmann,F. J. Romeiras
Annales Geophysicae (ANGEO) , 2003,
Abstract: Space observations in the solar wind and simulations of high Mach number bow-shocks have detected particle populations with two coexisting nongyrotropic ion species. We investigate the influence of these two sources of free energy on the stability of parallel (with respect to the ambient magnetic field) and perpendicular propagation. For parallel modes, we derive their dispersion equation in a magnetoplasma with protons and alpha particles that may exhibit stationary nongyrotropy (SNG) and discuss the characteristics of its solutions. Kinetic simulations study the behaviour of perpendicular electrostatic (Bernstein-like) waves in a plasma whose ion populations (positrons and fictitious singly-charged particles with twice the electron mass, for the sake of simulation feasability) can be time-varying nongyrotropic (TNG). The results show that the coexistence of two gyrophase bunched species does not significantly enhance the parallel SNG instability already found for media with only one nongyrotropic species, whereas it strongly intensifies the growth of Bernstein-like modes in TNG plasmas. Key words. Magnetospheric physics (plasma waves and instabilities) · Space plasma physics (numerical simulation studies; waves and instabilities)
Educational Value of Doctor Trainee Employments (“Student Doctor”) —A Questionnaire Study  [PDF]
Sven Wallerstedt, Maria Odqvist, Susanna M. Wallerstedt
International Journal of Clinical Medicine (IJCM) , 2015, DOI: 10.4236/ijcm.2015.67062
Abstract: Background: In Sweden, medical students can work as employed doctor trainees under supervision during medical school breaks. The aim of the present study was to evaluate the educational value of such employments, as well as to compare university and non-university positions. Method: A questionnaire was administered to all employed doctor trainees at Sahlgrenska University Hospital, Gothenburg, in 2003-2004 (n = 67) plus all students in last term medical school 2005 who had had such a position inside or outside this university hospital (n = 43). The questionnaire included questions on trainee position/s, as well as statements regarding the educational value. Result: 75 unique individuals returned a filled-in questionnaire (response rate: 78%). The respondents experienced the positions as valuable concerning gain in professional confidence (mean ± standard deviation: 3.9 ± 1.1; 1 = total disagreement to 5 = total agreement) and independence (3.9 ± 1.1), subsequent learning in medical school (4.3 ± 0.9), and future professional work (4.2 ± 1.0). The gain in professional confidence and independence was greater for those who had worked in a non-university hospital (n = 17) than in a university hospital (n = 29): 4.4 ± 0.6 vs. 3.6 ± 3.6, P = 0.011; 4.3 ± 0.7 vs. 3.6 ± 1.1, P = 0.038. Conclusion: Employment as a doctor trainee seems to facilitate subsequent learning in medical school and enhance professional progress; the latter is particularly prominent in non-university hospitals.
Pelo resgate da memória documental das ciências e da agricultura: o acervo do Instituto Biológico de S?o Paulo
Rebou?as, Márcia Maria;
História, Ciências, Saúde-Manguinhos , 2006, DOI: 10.1590/S0104-59702006000400011
Abstract: this brief inventory of the biological institute of s?o paulo's documental collection describes how the archive came to be and explains its relevance to history of sciences research in brazil. a short history of the institution provides insight into its activities in the field of agronomic research in s?o paulo and the role that sciences played in modernizing agriculture in that state. the collection contains documents by scientists whose names occupy a special place in the history of brazil, such as arthur neiva, henrique da rocha lima, and josé reis.
?Are you a real Christian??: Stereotypes, distrust and distinction strategies between ?new? and ?old? Protestants in Catalonia
Griera,Maria M.;
Etnográfica , 2008,
Abstract: the arrival of a high number of followers of the protestant faith due to the increase in immigration flows has shaped the configuration, expectations for future growth and the public role of the protestant community in catalonia. however, the adaptation process between ?new? and ?old? protestants has not been free of controversies. in this article, i deal with the analysis of the conflictive relationship between african pentecostal churches and the catalan protestant establishment. in order to do so, i explore the main transformations of the catalan protestant field (the phenomenon of reverse mission and above all the creation of ethnic churches) in recent times. the article is based on the fieldwork carried out among protestant churches in catalonia between the years 2002 and 2006 and on ethnographic fieldwork carried out in an african church in barcelona in 2004.
Desigualdades socioecon?micas na saúde
Diaz, Maria Dolores M.;
Revista Brasileira de Economia , 2003, DOI: 10.1590/S0034-71402003000100001
Abstract: this paper analyses brazilian socio-economic inequalities in health through the measurement of concentration indices for the variable self-assessed health status. data used were taken from the 1996/97 living standard measurement study (lsms). in summary, as far as socio-economic status variable distinction is concerned, it should be stressed that the degree of inequalities found when stratification was based on household total income per equivalent adult was slightly higher than that found when stratification was based on household total consumption expenditure per equivalent adult. the differences cited were shown statistically significant. with reference to the construction of equivalence scales for each household, one generally finds that the results are robust in relation to the different values used. the indices found for self-assessed health status reveal that health inequalities favour the richer.
Leucemia Mielóide Cr?nica em pediatria: perspectivas atuais
Lee, Maria Lucia M.;
Revista Brasileira de Hematologia e Hemoterapia , 2008, DOI: 10.1590/S1516-84842008000700014
Abstract: chronic myeloid leukemia (cml) is a rare event in childhood, comprising of less than 5% of all leukemia cases in this age group. cml is characterized by the presence of a specific molecular marker, the ph+ chromosome, which is responsible for almost all etiopathogenesis, hence, it has clinical and course characteristics that do not differ from the adult population. in pediatrics the therapeutic approach is based mainly on the experience obtained with adult protocols. with bone marrow transplantation (bmt) being the only cure option, this procedure is more effective in patients with compatible related donors and performed during the initial chronic phase of the disease. the great anti-leukemic efficacy seen with imatinib mesylate was responsible for the approval of this drug in pediatric use for intolerant or refractory -interferon treated patients or relapsed patients after bmt. currently, its use in pediatric patients with recently diagnosed cml, who have a compatible donor, has become a great dilemma. there is no agreement yet on which is the best way to use this drug or even whether it will ever replace bmt. further studies with longer follow-up periods are still needed.
Editorial
Barradas Maria Mércia
Acta Botanica Brasilica , 2000,
Abstract:
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