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Search Results: 1 - 10 of 171 matches for " Brazil "
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David Brazil
Ilha do Desterro , 2008,
Abstract: The so-called 'tag' structures of English have received a lot of attention in language teaching programmes, attention that is not hard to justify when one considers the problems and anxiety they can occasion for many foreign learners. Most teachers one speaks to seem fairly willing to agree, however, that traditional treatments of the topic leave much to be desired. It happens, also, that, when considered collectively, the tags and some related phenomena have a special heoretical interest. For they constitute a field in which it seems essential to bring together insights that derive from the study of several aspects of linguistic organisation, aspects which in some recent work have been held to need distinctive kinds of descriptive category to handle. Traditional treatments have found it necessary to recognise different syntactic types (e.g. 'same polarity' and 'reversed polarity' tags) and ifferent intonational treatments ("falling'and 'rising' tag); while the way the communicative significance of the various permutations is described normally requires reference to the expectations they signal regarding the immediately following behaviour of the other party (in the common phrase, 'What kind of answer they expect'). This last consideration places the matter squarely in the arena of recent work on the analysis of interactive discourse. The so-called 'tag' structures of English have received a lot of attention in language teaching programmes, attention that is not hard to justify when one considers the problems and anxiety they can occasion for many foreign learners. Most teachers one speaks to seem fairly willing to agree, however, that traditional treatments of the topic leave much to be desired. It happens, also, that, when considered collectively, the tags and some related phenomena have a special heoretical interest. For they constitute a field in which it seems essential to bring together insights that derive from the study of several aspects of linguistic organisation, aspects which in some recent work have been held to need distinctive kinds of descriptive category to handle. Traditional treatments have found it necessary to recognise different syntactic types (e.g. 'same polarity' and 'reversed polarity' tags) and ifferent intonational treatments ("falling'and 'rising' tag); while the way the communicative significance of the various permutations is described normally requires reference to the expectations they signal regarding the immediately following behaviour of the other party (in the common phrase, 'What kind of answer they expect'). This l
Sexing sand fly pupae (Diptera: Psychodidade: Phlebotominae)
Brazil, Beatriz Gomes;Brazil, Reginaldo Pe?anha;
Memórias do Instituto Oswaldo Cruz , 2000, DOI: 10.1590/S0074-02762000000400004
Abstract: we describe a technique to separate male and female pupae of sand flies. this has reduced the labour to separate flies after emergence and also allows the isolation of unmated adults for behavioural and physiological studies.
Sexing sand fly pupae (Diptera: Psychodidade: Phlebotominae)
Brazil Beatriz Gomes,Brazil Reginaldo Pe?anha
Memórias do Instituto Oswaldo Cruz , 2000,
Abstract: We describe a technique to separate male and female pupae of sand flies. This has reduced the labour to separate flies after emergence and also allows the isolation of unmated adults for behavioural and physiological studies.
Coral snake venoms: mode of action and pathophysiology of experimental envenomation
Brazil, Oswald Vital;
Revista do Instituto de Medicina Tropical de S?o Paulo , 1987, DOI: 10.1590/S0036-46651987000300001
Abstract: coral snakes, the new world elapidae, are included in the genera micniroides and micrurus. the genus mlcrurus comprises nearly all coral snake species and those which are responsible for human snake-bite accidents. the following generalizations concerning the effects induced by their venoms, and their venom-properties can be made. coral snake venoms are neurotoxic, producing loss of muscle strenght and death by respiratory paralysis. local edema and necrosis are not induced nor blood coagulation or hemorrhages. proteolysis activity is absent or of very low grade. they display phospholipase a2 activity. nephrotoxic effects are not evoked. the main toxins from elapid venoms are postsynaptic and presynaptic neurotoxins and cardiotoxins. phospholipases a2 endowed with myonecrotic or cardiotoxin-like properties are important toxic components from some elapid venoms. the mode of action of micrurus frontalis, m. lemniscatus, m. corallinus and m. fulvius venoms has been investigated in isolated muscle preparations and is here discussed. it is shown that while m. frontalis and m. lemniscatus venoms must contain only neurotoxins that act at the cholinergic end-plate receptor (postsynaptic neurotoxins), m. corallinus venom also inhibits evoked acetylcholine release by the motor nerve endings (presynaptic neurotoxin-like effect) and m. fulvius induces muscle fiber membrane depolarization (cardiotoxin-like effect). the effects produced by m. corallinus and m. fulvius venoms in vivo in dogs and m. frontalis venom in dogs and monkeys are also reported.
CONSIDERA ES ACERCA DO CONCEITO DE VONTADE DE PODER
Luciano Gomes Brazil
Griot : Revista de Filosofia , 2012,
Abstract: A proposta é repensar o famoso conceito de Nietzsche, vontade de poder. Procurou-se fazer isto de três maneiras: primeiro o conceito é visado a partir da etimologia da palavra. Depois algumas interpreta es s o expostas e ent o se procura, por fim, pensar o conceito a partir de seu texto de origem, a passagem “Do Superar a si mesmo” e outras que lhe precedem, na obra Assim Falou Zaratustra.
DASS: Detail Aware Sketch-Based Surface Modeling
Emilio Vital Brazil
Computer Science , 2014,
Abstract: We present a sketch-based modeling system suitable for detail editing, based on a multilevel representation for surfaces. The main advantage of this representation allowing for the control of local (details) and global changes of the model. We used an adaptive mesh (4-8 mesh) and developed a label theory to construct a manifold structure, which is responsible for controlling local editing of the model. The overall shape and global modifications are defined by a variational implicit surface (Hermite RBF). Our system assembles the manifold structures to allow the user to add details without changing the overall shape, as well as edit the overall shape while repositioning details coherently.
Isolation and Identification of 9-methylgermacrene-B as the Putative Sex Pheromone of Lutzomyia cruzi (Mangabeira, 1938) (Diptera: Psychodidae)
Brazil, Reginaldo P;Hamilton, JGC;
Memórias do Instituto Oswaldo Cruz , 2002, DOI: 10.1590/S0074-02762002000300030
Abstract: lutzomyia (lutzomyia) cruzi has been named as a probable vector of leishmania chagasi in corumbá, mato grosso do sul, brazil. taxonomically l. cruzi is closely related to the l. longipalpis species complex. females of l. cruzi and l. longipalpis are morphologically indistinguishable and associated males must be examined carefully to confirm identifications. chemical analysis hexane extracts of male l. cruzi has revealed the presence of a 9-methylgermacrene-b (c16), a homosesquiterpene (mw 218) previously shown to be the sex pheromone of one of the members of the l. longipalpis species complex.
Isolation and Identification of 9-methylgermacrene-B as the Putative Sex Pheromone of Lutzomyia cruzi (Mangabeira, 1938) (Diptera: Psychodidae)
Brazil Reginaldo P,Hamilton JGC
Memórias do Instituto Oswaldo Cruz , 2002,
Abstract: Lutzomyia (Lutzomyia) cruzi has been named as a probable vector of Leishmania chagasi in Corumbá, Mato Grosso do Sul, Brazil. Taxonomically L. cruzi is closely related to the L. longipalpis species complex. Females of L. cruzi and L. longipalpis are morphologically indistinguishable and associated males must be examined carefully to confirm identifications. Chemical analysis hexane extracts of male L. cruzi has revealed the presence of a 9-methylgermacrene-B (C16), a homosesquiterpene (mw 218) previously shown to be the sex pheromone of one of the members of the L. longipalpis species complex.
Factors associated with home death for individuals who receive home support services: a retrospective cohort study
Kevin Brazil, Michel Bedard, Kathleen Willison
BMC Palliative Care , 2002, DOI: 10.1186/1472-684x-1-2
Abstract: The participants in this retrospective cohort study were 151 family caregivers of patients who had died approximately 9 months prior to the study telephone interview. The interview focused on the last year of life and covered two main areas, patient characteristics and informal caregiver characteristics.Odds ratios [OR] and 95% confidence intervals [95% CI] were used to determine which of the 15 potential informal caregiver and seven patient predictor variables were associated with dying at home. Multivariate analysis revealed that the odds of dying at home were greater when the patient lived with a caregiver [OR = 7.85; 95% CI = (2.35, 26.27)], the patient stated a preference to die at home [OR= 6.51; 95% CI = (2.66,15.95)], and the family physician made home visits [OR = 4.79; 95% CI = (1.97,11.64)]. However the odds were lower for patients who had caregivers with fair to poor health status [OR = 0.22; 95% CI = (0.07, 0.65)] and for patients who used hospital palliative care beds [OR = 0.31; 95% CI = (0.12, 0.80)].The findings suggest that individuals who indicated a preference to die at home and resided with a healthy informal caregiver had better odds of dying at home. Home visits by a family physician were also associated with dying at home.Current government policy in Canada is pressing for more and better care of the terminally ill in the community [1-3]. Several factors contribute to the re-emergence of home death, including: preference of the terminally ill and their families to remain in the home, recognition of the limited benefits found in medical care, improvements in home based medical technology and pharmacology, and hospital restructuring resulting in the closure of hospital beds [4,5]. Related to this shift is an increasing elderly population which provides an impetus for the development of home based palliative care programs [6,7]. Despite the above, fewer people are able to die at home than would wish to do so. While death at home is preferred by
Identification of the sex pheromone of Lutzomyia longipalpis (Lutz & Neiva, 1912) (Diptera: Psychodidae) from Asunción, Paraguay
Reginaldo P Brazil, Norath Caballero, James Hamilton
Parasites & Vectors , 2009, DOI: 10.1186/1756-3305-2-51
Abstract: In this study, we present the results of a coupled gas chromatography - mass spectrometry analysis of the pheromones of males Lu. longipalpis captured in an endemic area of visceral leishmaniasis in Asunción, Paraguay. Our results show that Lu. longipalpis from this site produce (S)-9-methylgermacrene-B which has also been found in Lu. longipalpis from different areas of Brazil, Colombia and Central America.Visceral leishmaniasis is endemic in several areas of Paraguay with the reports of sporadic cases and consecutive increase in the last few years [1-3]. Asuncion in the Central Department of Paraguay has reported the largest numbers of human cases but other regions more distant from the capital, such as Bella Vista Norte, near the border with Brazil, Encarnacion, near the border with Argentina, and the Departments of Conception and Amambay y San Pedro have been considered as new endemic areas by the Paraguayan Health Secretary [4,5].As in most endemic areas, Lutzomyia longipalpis s.l. is the main vector of Leishmania (L.) infantum (Kinetoplastida: Trypanosomatidae), the causative agent of visceral leishmaniasis in South and Central America. Even though Lu. longipalpis is recognized as a species complex, no consensus has been established on the number of species present in the New World [6-13].Field and laboratory observations have shown that, prior to copulation, Lu. longipalpis s.l. males wing flutter. This behaviour is associated with pheromone release by males during courtship [14-16]. The sex pheromones are produced in glandular tissue that underlies the cuticle of the abdominal tergites. Those pheromone-disseminating structures are visible, as a pair of pale patches [17,18] on the fourth or third and fourth tergites and have been confirmed as the site of sex pheromone production [19]. There is no relationship between spot morphology and sex pheromone type [20]. Sex pheromones of the Lu. longipalpis species complex have been shown to be homosesquiterpenes (C16
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