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Search Results: 1 - 10 of 175007 matches for " Berta Lange de; "
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Contribui??o ao conhecimento da anatomia foliar de espécies da vegeta??o das dunas interioranas do Municipio de Len?ois-Bahia
Morretes, Berta Lange de;
Acta Botanica Brasilica , 1987, DOI: 10.1590/S0102-33061987000300014
Abstract: three inland dune species were studied in the present investigation, with regard to their leaf anatomy: leucothoe oleifolia (ericaceae), palicourea marcgravii (rubiaceae) and waltheria cinerescens (sterculiaceae). the ecological area in which these species line is considered to be a transition between cerrado and forest. xeromorphic characters are seen in the three species such as: adaxial epidermis with anticlinal cell walls being thickened as well as even or slightly curved when this tissue is observed in surface view; stomata and trichomes of the non-glandular and glandular types - in great number; achlorophyllous subepidermal layers; compact palisade parenchym; cell walls with reticulate thickening in the chlorenchyma; bundle sheaths and bundle sheath extensions occuring in three types: sclerenchymatous, parenchymatous and partly parenchymatous. the mentioned characters do not occur simultaneously.
Anatomia das raízes de Bacopa salzmanii (Benth.) Wettst. Ex Edwall e Bacopa Monnierioides (Cham.) Robinson (Scrophulariaceae) em ambientes aquático e terrestre
Bona, Cleusa;Morretes, Berta Lange de;
Acta Botanica Brasilica , 2003, DOI: 10.1590/S0102-33062003000100012
Abstract: this work describes the anatomy of roots of bacopa salzmanii (benth.) wettst. ex edwall and b. monnierioides (cham.) robinson and its adaptations to aquatic and terrestrial environments. both species were collected in the city of bonito and in the pantanal (state of mato grosso do sul). adventitious roots were analyzed, from the apex to the base of the root. tissues origin and development were emphasized. the apical meristem presents the same structure in both species and it is not significantly altered by the environmental changes. all the tissues are originated from three different layers, in the region of the promeristem. the young endodermis is meristematic and originates the cortex. the aerenchyma is abundant and the septa may contain phi thickenings. the exodermis is uniserial and composed of short and elongated cells. root cap of both species is few developed in both environments.
Anatomia foliar de Eugenia florida DC. (Myrtaceae)
Donato, Ana Maria;Morretes, Berta Lange de;
Revista Brasileira de Farmacognosia , 2009, DOI: 10.1590/S0102-695X2009000500019
Abstract: a study of the foliar anatomy of eugenia florida dc., a tree of myrtaceae family collected at funda??o oswaldo cruz, rio de janeiro, rj, was accomplished. this species presents important pharmacological properties, including antiviral activity. the aim of this research was to furnish data, revealed by optical microscopy and scanning electronically microscopy, in order to contribute to the knowledge of the species and to its safe identification. anatomically, the leaf is hipostomatic, with dorsiventral mesophyll. simple unicellular hairs are present only on the adaxial side of the leaf in the midvein region. anticlinal walls of epidermal cells are undulate and the cuticle is striate. palisade parenchyma presents a large amount of prismatic oxalate crystals. in subepidermical position there are secretory cavities bearing ethereal oils. these structures occur in a low frequency and are scattered along the both sides of the foliar blade. the epidermal cells that overlap the secretory cavities form an important characteristic anatomical feature. they are recognizable by the top cell, which presents a kidney shape surrounded by cells in a radiate way. the comparison between sun and shade leaves shows a complete development of the secretory cavities and a higher concentration of ergastic compounds in the first ones.
Anatomia foliar de Eugenia brasiliensis Lam. (Myrtaceae) proveniente de áreas de restinga e de floresta
Donato, Ana Maria;Morretes, Berta Lange de;
Revista Brasileira de Farmacognosia , 2007, DOI: 10.1590/S0102-695X2007000300018
Abstract: the present paper presents the foliar anatomy of eugenia brasiliensis lam. the essential oils produced by this species present anti-reumathic, diuretic and anti-inflammatory properties and show activity against tripanosoma cruzi. this study was carried out by comparison between leaves developed in restinga and forest areas, in order to register the main differences in the structure of this organ related to environmental conditions. anatomically, the leaf of e. brasiliensis is hipostomatic, glabrous, with dorsiventral mesophyll, whit tendency towards the isobilateral type. thickness of the cuticle and cutinized wall is noteworthy. in sub-epidermical position, there are many secretory cavities that produce essential oils, in both sides of the foliar blade. in the spongy parenchyma there are calcium oxalate druses crystals. e. brasiliensis leaves developed in restinga area present, in relation to that proceeding from forest, a larger amount of secretory structures, a higher ergastic substances concentration, thicker cuticle and foliar blade, more abundant stomata, a more compact mesophyll, sclerenchyma fibers and xilem elements with a deeper lignification and a greater development of the vascular system. the data obtained in this research suggest that the choice of the area where e. brasiliensis should be collected is important, because in restinga area it presents a greater production of essential oils and other substances associated with therapeutic effects.
Anatomia das raízes de Bacopa salzmanii (Benth.) Wettst. Ex Edwall e Bacopa Monnierioides (Cham.) Robinson (Scrophulariaceae) em ambientes aquático e terrestre
Bona Cleusa,Morretes Berta Lange de
Acta Botanica Brasilica , 2003,
Abstract: O presente trabalho enfoca a anatomia das raízes de Bacopa salzmanii (Benth.) Wettst. Ex Edwall e B. monnierioides (Cham.) Robinson e suas adapta es aos ambientes aquático e terrestre. Foram analisadas raízes adventícias das duas espécies, coletadas no Município de Bonito e no Pantanal do Mato Grosso do Sul. As análises foram feitas do ápice à base da raiz, enfatizando a origem e desenvolvimento dos tecidos. O meristema apical apresenta a mesma estrutura nas duas espécies e n o sofre altera es marcantes com a mudan a do ambiente. Todos os tecidos se originam de três camadas distintas, na regi o do promeristema. A endoderme jovem é meristemática e dá origem ao córtex. O aerênquima é abundante e os septos podem conter espessamento em fi. A exoderme é unisseriada e composta por células curtas e longas. A coifa das duas espécies é pouco desenvolvida e apresenta estrutura semelhante nos dois ambientes.
Stigmatic surface in the Vochysiaceae: reproductive and taxonomic implications
Carmo-Oliveira, Renata;Morretes, Berta Lange de;
Acta Botanica Brasilica , 2009, DOI: 10.1590/S0102-33062009000300018
Abstract: the vochysiaceae are neotropical trees and shrubs, common in the savanna areas in central brazil (cerrados). the family has been traditionally divided into two tribes: erismeae, with three genera, and vochysieae, with five genera. we investigated the stigmatic surface of six vochysiaceae species, belonging to four genera of vochysieae: vochysia, salvertia, callisthene and qualea. flowers and buds at different developmental stages were collected. morphological features were observed on fresh material and stigmatic receptivity was inferred based on esterasic activity. pistils were fixed and embedded in paraplast and sectioned on a rotary microtome; the sections were stained before histological analysis. stigmas of open flowers were also observed by scanning electron microscopy. stigmas of all species were wet and showed esterasic activity at pre-anthesis and anthesis stages. stigmatic surface was continuous with transmitting tissue of glandular nature. vochysia and salvertia stigmatic surfaces were formed by multicelular uniseriate hairs, and species of the remaining genera showed papillate surface. the exudate over mature stigmas in all species flowed without rupture of stigmatic surface and pollen tubes grew down between hairs or papillae. differences on the stigmatic surface agreed with a phylogenetic reconstruction that separated two clades and indicated that vochysieae is not monophyletic. stigmatic features could not be associated with pollination and breeding systems.
Ajustes Conversacionales para el Aprendizaje de Contenidos en L2
Berta de Dios
Bellaterra Journal of Teaching & Learning Language & Literature , 2010,
Abstract: Este trabajo pretende describir las interacciones conversacionales entre el alumnado en las aulas AICLE. Nos preguntamos si hay un vínculo entre las características de las interacciones y el aprendizaje de contenidos no lingüísticos y, si es así, qué tipo de ajustes fomentan dicho aprendizaje. Las aulas AICLE son los entornos ideales para estudiar el vínculo entre ajustes conversacionales y aprendizaje de contenidos porque, al no ser en la lengua materna del alumnado, se dan más ajustes conversacionales que en las clases en lengua materna.---------------------------------------------This article pursues to describe conversational adjustments among students in CLIL classes. We wonder if there is a link between the characteristics of the interactions and the learning of non-linguistic contents and, if there is, what kind of adjustments promote such learning. CLIL classes are the ideal environments to study the link between conversational adjustments and the learning of contents because, since they are not in the students’ mother tongue, conversational adjustments occur more frequently than in classes in mother tongue.
The mastermind approach to CNS drug therapy: translational prediction of human brain distribution, target site kinetics, and therapeutic effects
Elizabeth CM de Lange
Fluids and Barriers of the CNS , 2013, DOI: 10.1186/2045-8118-10-12
Reflections on methodology and interdisciplinarity in the postmodern dialogue between theology and the natural sciences
M C de Lange
Acta Theologica , 2007,
Abstract: Postmodern interdisciplinarity provides a more flexible and productive methodological framework for the age-old dialogue between theology and the natural sciences than did the modern more rigid and oppositional disciplinary framework. Taking the work of Wentzel van Huyssteen as basis, the author focuses on developing an understanding of the roles of interdisciplinarity, foundationalism, non-foundationalism, and postfoundationalism in the dialogue between theology and science, and highlights the methodological changes resulting from the change-over from modernity to postmodernity. Acta Theologica Vol. 2 2007: pp. 44-62
Radiology in paediatric non-traumatic thoracic emergencies
Charlotte de Lange
Insights into Imaging , 2011, DOI: 10.1007/s13244-011-0113-4
Abstract: Non-traumatic thoracic emergencies in children are very frequent, and they usually present with breathing difficulties. Associated symptoms may be feeding or swallowing problems or less specific general symptoms such as fever, sepsis or chest pain. The emergencies always require a rapid diagnosis to establish a medical or surgical intervention plan, and radiological imaging often plays a key role. Correct interpretation of the radiological findings is of great importance in diagnosing and monitoring the illness and in avoiding serious complications. Plain radiography with fluoroscopy still remains the most important and frequently used tool to gain information on acute pulmonary problems. Ultrasound is the first choice for the detection and treatment of simple and complicated pleural effusions. Cross-sectional techniques such as multidetector computed tomography (MDCT) and magnetic resonance imaging (MRI) are mainly used to study pulmonary/mediastinal masses and congenital abnormalities of the great vessels and the lungs. This article will discuss the choice of imaging technique, the urgency of radiological management and the imaging characteristics of acquired and congenital causes of non-traumatic thoracic emergencies. They represent common conditions involving the respiratory tract, chest wall and the oesophagus, as well as the less frequent causes such as tumours and manifestations of congenital malformations.
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