bluuebunny/crossref_metadata_2025 huggingface dataset:
Demographic, clinical characteristics and cardiovascular disease burden in a Portuguese cohort of older chronic kidney disease patients
Authors: Lascasas Josefina Maria Sousa Santos , Fonseca Isabel , Malheiro Jorge , Santos Sofia , Campos Andreia , Castro Ana , Moreira Carla , Correia Sofia , Beirão Idalina , Lobato Luísa , Cabrita António
Published: January 2019

ABSTRACT Introduction: Chronic kidney disease (CKD) is an independent risk factor for several unfavorable outcomes including cardiovascular disease (CVD), particularly in the elderly, who represent the most rapidly growing segment of the end-stage kidney disease (ESKD) population. Portugal has the highest European unadjusted incidence and prevalence rates of ESKD. In 2012, we started to follow a cohort of elderly CKD patients, we describe their baseline characteristics, risk profile, and cardiovascular disease burden. Methods: All CKD patients aged 65 years and older referred to our department during 2012 were enrolled. Baseline data included: demographic, CKD stage, medication, comorbid conditions. Estimated glomerular filtration rate (eGFR) was calculated by the CKD-EPI formula. Results: A total of 416 patients, 50% referred by primary care physicians, aged 77 ± 7 years, 52% male, with a median eGFR of 32 mL/min/1.73m2 participated in the study. Fifty percent had diabetes (DM), 85% dyslipidemia, 96% hypertension; 26% were current/former smokers, and 24% had a body mass index > 30 kg/m2. The prevalence of CVD was 62% and higher in stage 4-5 patients; in diabetics, it gradually increased with CKD progression (stage 3a < stage 3b < stage 4-5) (39, 58, 82%; p < 0.001). Conclusions: At baseline, our CKD elderly cohort had a higher burden of CVD. The prevalence of CVD was greater than in other European CKD cohorts. Lower level of eGFR was associated with a greater burden of CVD and was more pronounced in diabetics, highlighting the importance of strategically targeting cardiovascular risk reduction in these patients.
Takayasu arteritis: differential diagnosis in a teenager with severe acute kidney injury - a case report
Authors: Braga Nara Thaisa Tenório Martins , Carneiro Adriana Banhos , Zuntini Kathia Liliane da Cunha Ribeiro , Araújo Flávio Bezerra de , Daher Elizabeth De Francesco
Published: January 2019

ABSTRACT Takayasu arteritis (TA) is a chronic granulomatous inflammatory condition of unknown cause that involves large vessels - particularly the aorta and its branches - such as the carotid, coronary, pulmonary, and renal arteries. The left subclavian artery is the most frequently involved vessel. Stenosis of the renal artery has been reported in 23-31% of the cases and may result in malignant hypertension, ischemic renal disease, decompensated heart failure, and premature death. Involvement of both renal arteries is uncommon. Early onset anuria and acute kidney injury are rare and have been reported only in a few cases in the literature. This report describes the case of a 15-year-old female with constitutional symptoms evolving for a year, combined with headache, nausea, and vomiting, in addition to frequent visits to emergency services and insufficient clinical examination. The patient worsened significantly six months after the onset of symptoms and developed acute pulmonary edema, oliguria, acute kidney injury, and difficult-to-control hypertension, at which point she was admitted for intensive care and hemodialysis. Initial ultrasound examination showed she had normal kidneys and stenosis-free renal arteries. The patient was still anuric after 30 days of hospitalization. A biopsy was performed and revealed her kidneys were normal. Computed tomography angiography scans of the abdominal aorta presented evidence of occlusion of both renal arteries. The patient met the diagnostic criteria for Takayasu arteritis and had a severe complication rarely described in the literature: stenosis of the two renal arteries during the acute stage of ischemic renal disease.
High grade renal trauma due to blunt injury in children: do all require intervention?
Authors: Govindarajan Krishna Kumar , Utagi Mallikarjun , Naredi Bikash Kumar , Jindal Bibekanand , Sambandan Kumaravel , Subramaniam Deepakbharathi
Published: January 2019

ABSTRACT Introduction: The aim of this study was to analyze the presentation and management of major grade renal trauma in children. Method: A retrospective study was performed including data collected from the patients who were admitted in Pediatric surgery with major grade renal injury (grade 3 and more) from January 2015 to August 2018. Demography, clinical parameters, management, duration of hospital stay and final outcome were noted. Results: Out of 13 children (9 males and 4 females), with age range 2-12 years (mean of 8 years), reported self-fall was the commonest mode of injury followed by road traffic accident. The majority (10/13, 75%) had a right renal injury. Eight children had a grade IV injury, one had a grade V injury, and four children had grade III injury. Duration of hospital stay varied from 3 to 28 (mean of 11.7) days. Three children required blood transfusion. One child required image guided aspiration twice and two required pigtail insertion for perinephric collection. All the 13 children improved without readmission or need for any other surgical intervention. Conclusion: Children with major grade renal trauma due to blunt injury can be successfully managed without surgical intervention and minimal intervention may only be needed in select situations.
The experience of grandmothers in the care of the adolescent who consumes psychoactive substances
Authors: Takahara Andressa Hithomi , Galera Sueli Aparecida Frari , Zanetti Ana Carolina Guidorizzi , Gonçalves Angélica Martins de Souza , Protti-Zanatta Simone Terezinha , Zerbetto Sonia Regina
Published: January 2019

Abstract Objective: To apprehend the experience of grandmothers who take care of their grandchildren who consume psychoactive substances. Methods: A descriptive study with a qualitative approach conducted with five grandmothers of two health services in a city in the interior of São Paulo. Data have collected from July 2015 to May 2016, through semi-structured interviews and analyzed using the technique of thematic content analysis. Results: The grandmothers recognized that their grandchildren used drugs when they changed their behavior, which required them to take on the role of counselor and educator. The aging process and financial difficulty consisted in limits to care. Conclusion and implications for practice: The grandmothers suffered psychosocial, structural, and organizational impacts, requiring nurses to enhance their facilitator skills in relational processes between two distinct generations of age and values.
Knowledge and practice of nursing professionals about prophylaxis of ophthalmia neonatorum
Authors: Duarte Fernanda Carla Pereira , Góes Fernanda Garcia Bezerra , Moraes Juliana Rezende Montenegro Medeiros de , Silva Laura Johanson da , Silva Liliane Faria da , Silva Maria da Anunciação
Published: January 2019

Abstract Objective: To analyze the knowledge and practice of nursing professionals about the prophylaxis of ophthalmia neonatorum. Method: Descriptive study, of qualitative approach, carried out in the first semester of 2018, in a city hall hospital located in the lake area of the Rio de Janeiro's state, through semi-structured interviews with 14 Nursing professionals participating in the care of the newborn, whose data were submitted to the Thematic Analysis. Results: From the three emerging thematic categories, there are gaps in knowledge related to ophthalmia neonatorum, silver nitrate and the instillation procedure of this prophylactic solution, as well as differences in care practice regarding care before, during and after the procedure. Conclusion and implications for practice: The data point to the importance of training the Nursing team in the prophylaxis of ophthalmia neonatorum, the revision of guidelines and procedures aimed at standardizing the procedure, as well as emphasizing the need for adequate follow-up of pregnant women in prenatal care.
Uma Breve Genealogia do Teatro e Educação no Brasil: o teatro para crianças
Authors: Gomes Sidmar Silveira , Aquino Julio Groppa
Published: January 2019

Resumo: O presente artigo propõe uma mirada histórico-política sobre o encontro entre teatro e educação, tendo o teatro para crianças como seu operador prático. A reboque de um esforço analítico inspirado na teorização foucaultiana, o estudo versa sobre o discurso em torno da temática no Brasil desde o início até meados do século XX, valendo-se de duas fontes não usuais na historiografia teatral: o jornal Correio da Manhã e a Revista Brasileira de Estudos Pedagógicos. Ao evidenciar o atrelamento discursivo das práticas teatrais ao ideário da Escola Nova, o estudo atribui aos teatros infantil e escolar um lugar de destaque entre as estratégias pedagogizantes de governamento populacional.
Entre a Presença do Ouvir, Sentidos a Escutar
Authors: Wenzel Rafaela Aline , Richter Sandra Regina Simonis
Published: January 2019

Resumo: No ensaio aproximam-se estudos fenomenológicos em torno da dimensão poética da linguagem para uma abordagem das ações de ouvir e escutar como distintas na experiência de produção de sentidos. Estabelece-se uma interlocução entre filosofia e poética para pensar a inseparabilidade entre corpo e mundo, ritmo e voz, e assim destacar a relevância educacional da experiência estésica da escuta do mundo como ressonância fundante de sentidos que são organizados, situados e expressos em linguagem.
Cultura Popular Negra e Subalternidade: uma análise do espetáculo Zumbi de João das Neves
Authors: Moreira Carina Maria Guimarães
Published: January 2019

Resumo: O presente artigo tece uma análise da peça Zumbi (2012) de João das Neves, obra inspirada em Arena conta Zumbi (1965) de Boal e Guarnieri, apresentando as problemáticas ligadas às questões contemporâneas em perspectiva ao passado escravista e ao presente político do Brasil, que desembocaram no momento atual de restrição dos direitos democráticos. Em seguida, desenvolve-se temas como o da condição pós-colonial, que permeia as relações centro/periferia e intercâmbios culturais; e o das narrativas subalternas, que procuram trazer à tona narrativas dissonantes às oficiais. Por fim, busca-se trabalhar, dessa forma, a análise de Zumbi à luz das culturas populares negras, ressaltando a dimensão política contida na encenação de 2012.
A Educação Somática como Perspectiva Inclusiva nas Aulas de Educação Física Escolar
Authors: Costa Fábio Soares da , Santos Andreia Mendes dos , Rodrigues Janete de Páscoa
Published: January 2019

Resumo: A Educação Somática, como conjunto de técnicas corporais e processo relacional que tangencia nossa biologia, consciência e o meio ambiente, pode ser desenvolvida na escola com fins pedagógicos e conseguir constituir-se como meio de inclusão das diversidades corporais, comportamentais e de aptidão física. Essa assertiva induz a objetivar o desenvolvimento de reflexões sobre algumas experiências/pesquisas de Educação Somática no Brasil, com o intuito de iniciar uma discussão epistemológica para novas propostas curriculares de Educação Física Escolar que envolvam os princípios da Educação Somática na educação básica brasileira.
Igbo Language and Literature in Classroom Discourse: a pedagogical experimente
Authors: Ernest-Samuel Gloria Chimeziem
Published: January 2019

Abstract: This paper shares a pedagogical experiment of Igbo language instruction using a folktale literature and its film adaptation. The ethnographic study reveals that film viewership affects the students’ appreciation of the literature and the language and enhances students’ cooperation in sharing and contributing in the learning exercise. The study emphasizes the importance of interactive teaching methods and argues that with globalization and persistent technological invasion, African and cultural studies’ scholars need to reflect on innovative approaches to the instruction of local languages and literature to sustain youth interest in African culture/cultural studies in a technological era.
Theatre at Moscow Hermann Matern School: performing tradition, educational innovations, perspectives on artistic activities
Authors: Volkova Viktoria
Published: January 2019

Abstract: The article describes the more than 45 years of history of theatrical tradition at Moscow Hermann Matern School as well as the transformation of this tradition into an educational innovation in the 1990s. An annual competition in theatrical performance called Theatre Week for Children has been held since the late 1970s for students from grades 1 to 11. However, since the mid-90s, some new educational forms based on this theatrical tradition have been introduced as an experiment in teaching humanities at this school. Alongside traditional educational forms, students have been encouraged to stage the elected material, mostly in the subjects of literature and foreign languages (German, English), but also in history.
Quando a Dança nos Toca: significados, ética e presença em práticas com toque no currículo
Authors: Falkembach Maria Fonseca
Published: January 2019

Resumo: O artigo apresenta recorte da pesquisa realizada com seis professoras de dança em escolas públicas no sul do Brasil. A pesquisa, de cunho etnográfico, estuda aulas de dança no componente curricular de Arte. O texto analisa práticas de dança em que alunos e alunas se tocam. Desde a perspectiva teórica de Michel Foucault, identifica que tais práticas produzem tensões com as tecnologias de produção do corpo-sujeito escolar e com a codificação hegemônica do toque e da pele. Mostra como o toque escapa à operação de normalização. Aponta efeitos das práticas de dança com o toque: suspensão de significados culturais corporificados; emergência da dimensão da presença; trabalho ético.
RAYMOND WILLIAMS E A EDUCAÇÃO DEMOCRÁTICA
Authors: Paixão Alexandro Henrique
Published: January 2019

RESUMO: Partindo de uma perspectiva combinada entre a sociologia da cultura e a história cultural, para enfatizar a experiência inglesa da educação de adultos contada a partir da história particular de Raymond Williams e de duas instituições, Universidade de Oxford e Workers’ Educational Association, este artigo discutirá como um saber pedagógico foi produzido a partir da relação entre um tutor e seus estudantes adultos no contexto do pós-guerra. Para isso, o texto se organizará em dois momentos: primeiro, apresentará uma explanação geral sobre a educação de adultos como um projeto político, intelectual e voluntário atrelado à defesa da democracia na Inglaterra; segundo, discutirá como Raymond Williams participou desse processo, oferecendo significativas contribuições teórico-práticas para o debate da educação democrática daquele momento.
FEDERALISMO COOPERATIVO E EDUCAÇÃO NO BRASIL: 30 ANOS DE OMISSÕES E AMBIVALÊNCIAS
Authors: Araujo Gilda Cardoso de
Published: January 2019

RESUMO: O artigo teve por objetivo problematizar como as omissões e as ambivalências quanto à regulamentação da cooperação federativa vêm propiciando o delineamento e a difusão de formas de colaboração oriundas de organizações de interesses empresariais que são antagônicas aos interesses da organização da educação sob a forma do sistema nacional. A partir de pesquisa bibliográfica e documental, são discutidas a cooperação federativa em matéria educativa, as omissões do Legislativo quanto à sua regulamentação e a atuação ambivalente do Ministério da Educação e da Secretaria de Articulação dos Sistemas de Ensino. As conclusões indicam o avanço das proposições das organizações de interesses empresariais em detrimento da adequada regulamentação da matéria por meio de Lei Complementar.
A TRANSVERSALIDADE DAS REGULAÇÕES EM EDUCAÇÃO: MODELO DE ANÁLISE PARA O ESTUDO DAS POLÍTICAS EDUCATIVAS EM PORTUGAL
Authors: Barroso João
Published: January 2019

RESUMO: No presente artigo, com base na investigação realizada ao longo destes anos, irei apresentar, num primeiro momento, uma síntese sobre a evolução recente dos processos de governança em educação nos países da Organização para a Cooperação e Desenvolvimento Económico (OCDE); num segundo momento, utilizarei alguns exemplos que ilustram a influência transnacional, nacional, municipal e da escola na produção de políticas educativas específicas em Portugal; finalmente, fundamentarei, a partir dos exemplos utilizados, a necessidade de ter em conta, na análise das políticas educativas, a transversalidade das regulações e a interação entre os diferentes níveis de influência.
Designing Parameters of Surfactant-Free Electrochemical Sensors for Dopamine and Uric Acid on Nitrogen Doped Graphene Films
Authors: Matsoso Boitumelo J. , Lerotholi Tsenolo , Coville Neil J. , Jones Glenn
Published: January 2019

Electrochemistry studies on the derivatives of graphene have been in the forefront of chemical research in recent years. The large specific surface area, high electrical conductivity, fast electron transfer rate and excellent biocompatibility to biomolecules constitute a few of the underlying reasons for the extensive application of graphene derivatives in modern electrochemistry and related technologies. Much interest in graphene derivatives has been driven by the ease of intentional functionalisation of the carbon backbone of graphene with dopants, such as nitrogen. Doping enhances the electrical conductivity and biocompatibility of nitrogen-doped graphene (NGr) nanomaterials and aids in their potential applications in electrochemical sensing and spectroelectrochemical devices. Despite the application of NGr in electrochemical sensing devices, the major challenge for reproducible industrial application still lies in the use of surfactants and binders and the limited knowledge on the correlation between the N-configurations and the electrocatalytic performance of these NGr-based electrodes. Therefore, the purpose of this short review article is to highlight some recent progress on the application of NGr derivatives for electrochemical detection of biomarkers such as uric acid and dopamine. The paper will also illustrate design parameters for new surfactant-free two-dimensional (2D) N-doped graphene based electrochemical sensors with variable N-functionalities for the detection of dopamine and uric acid.
Una nueva especie de  Tauschia  (Umbelliferae) del Estado de México
Authors: Calderón de Rzedowski Graciela , Constance Lincoln
Published: January 2019

Tauschnia neglecta sp. nov. is described and illustrated on the basis of specimens collected in the State of México. Its chromosome number was determinated as n = 22. T. neglecta seerns to be related to T. filiformis (Coult. & Rose) Coult. & Rose known from Oaxaca and with T. seatonni (Coult. & Rose) Coult. & Rose known from Orizaba.
Adiciones a la flora arvense del Valle de México
Authors: Espinosa-García Francisco Javier Javier
Published: January 2019

The presence of two genera represented by three species, is reported for the first time in the Valley of Mexico: Kickxia elatine ssp. crinita (Scrophulariaceae), Lamium amplexicaule and L . purpureum (Labiatae). Descriptions and keys to distinguish these plants from related taxa are provided. Additional data concerning Polygonium convolvulus (Polygonaceae), a weed recently detected, are included.
Sobre la ecología reproductiva de Nicotiana glauca Grah: una maleza de distribución cosmopolita
Authors: Hernández Hector Manuel
Published: January 2019

Se estudiaron algunos eventos reproductivos de Nicotiana glauca Grah., una maleza de distribución cosmopolita, en el Pedregal de San Angel (SO de la Cuenca del Valle de México). La especie es esencialmentne ornitófila, pues es visitada por colibríes (fam. Trochilidae ) en el con tinente americano, mientras que en Africa y Australia la visitan otras aves pertenecientes a las familias Nectariniidae y Meliphagidae respectivamente. Dada su conducta de floración prolongada, su gran producción de néctar y las características de éste, los colibríes dependen de las poblaciones de N. glauca , sobre todo en los periodos de escasez de alimento, lo cual, al mismo tiempo, es benéfico para la reproducción de la planta. Más aún, tal parece que N . glauca , en tanto que especie introducida recientemente en México, ha tenido un papel importante en la ecología de los visitantes, sobre todo en lo que se refiere a sus movimientos estacionales. Las cuatro especies de colibríes identificadas en el estudio tienen dos estilos de forrajeo (estilo nómada y estilo territorial ), los cuales tienen implicaciones en el flujo de polen entre los individuos de N. glauca . Bajo este marco, se discute el posible papel que tiene los visitantes ilegítimos (robadores de néctar). Las técnicas experimentales utilizadas para conocer el sistema de reproducción demostraron que N . glauca es auto-compatible y capaz de auto-polinizarse, los cuales son elementos importantes en su éxito como especie colonizadora. Finalmente, se describen los tres diferentes mecanismos de dispersión de las semillas y se discute su importancia a la luz actual patrón de distribución de la especie.
Vegetación y flora de la región del Bolson de Cuatro Ciénegas. III Cactaceae a Compositae
Authors: Pinkava Donald J.
Published: January 2019

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Nuevo registro para México de Pontederia rotundifolia
Authors: Novelo-Retana Alejandro
Published: January 2019

Al revisar la colección de la familia de las pontederiaceas del Herbario Nacional de México (MEXU), se encontró una especie no reportada aún para México, la cual estaba incorrectamente identificada como Eichhornia azurea ( Sw.) Kunth.
Rhizophora harrisonii . (Rhizophoraceae), un nuevo registro para las costas de México
Authors: Rico-Gray Victor
Published: January 2019

Al revisar las colecciones del género Rhizophora depositadas en el Herbario de la Universidad Nacional Autónoma de México ( MEXU) y del Instituto Politécnico Nacional (ENCB) y, de la literatura que menciona información sobre la distribución de sus especies en América y el oeste de Africa, se encontró que para las Costas de México sólo se reporta Rhizophora mangle L. y, que en el resto del continente y el oeste de Africa encontramos R. harrisonii y R. racemosa, además de R. mangle
Nota sobre la distribución de Carpodiptera ameliae (Tiliaceae), en México
Authors: Téllez-Valdéz Oswaldo
Published: January 2019

Breve nota taxonómica
Nota aclaratoria sobre las hojas de Valeriana vaginata (Valerianaceae)
Authors: Vega Rosa Ma. , Rzedowski J.
Published: January 2019

Se describen y se ilustran las hojas verdaderas de Valeriana vaginata HBK., en la cual previamente se interpretaban como hojas las brácteas del escapo y de la inflorescencia.
Comparative photosynthetic characteristics of coastal and desert plants of California
Authors: Mooney H. A. , Berry J. , Björkman O. , Ehleringer J.
Published: January 2019

The photosynrhetic characteristics of planes native to a Californian hot desert habitar, Death Valley, and a cool coastal locality, Bodega Head, were compared. The desert planes showed a variety of responses including species with C3 and C4 photosymhetic pathways, drought tolerance and inrolerance, a wide range of thermal optima, and biochemical and morphological thermal acclimation. Most of the desert species have high photosynrhetic light requirements for saruration and high photosynrheticcapacicies.
Una nueva especie de Decazyx (Rutaceae) de Tabasco y Veracruz
Authors: Chiang Fernando
Published: January 2019

Se describe una nueva especie de Decazyx (D. esparzae, Rutaceae) de Tabasco y Veracruz. El nuevo taxon es un árbol pequeño, de la selva tropical del Sureste de México. La otra especie conocida de este género es D. macrophyllus de Honduras.
Nuevas combinaciones y una nueva variedad de Lycium (Solanaceae) de Norteamérica
Authors: Chiang Fernando
Published: January 2019

Se proponen 3 combinaciones nomenclaturales para Lycium de Norteamérica: L. macrodon var. dispermum , L. nodosum var. isthmense, L. parishii var. modestum, L. puberulum var. berberidoides, y una nueva variedad : L. californicum var. interior.
Estudios cromosómicos en Lycium (Solanaceae) de Norteamérica
Authors: Chiang Fernando
Published: January 2019

Se presenta la información de los estudios cromosómicos reportados sobre especies de Lycium en todo el mundo. Usando la técnica del "squash" se efectuaron recuentos cromosómicos a partir de células madres del polen en taxa de Lycium norteamericanos y, en un solo caso, se determinó este número utilizando la radícula de una semilla en germinación. Los taxa estudiados fueron: L. andersonii Gray var. andersonii , L. andersonii var. desertícola (C. L. Hitchc.) Jepson, L. andersonii var. pubescens S. Wats., L. andersonii var. wrightii A. Gray, L. berlandieri Dun. var. berlandieri, L. berlandieri var. Parviflorum (Gray) Terrac., L. berlandieri var. peninsulare ( Brandeg.) C. L. Hitchc., L. brevipes Benth. var. brevipes, L. californicum Nutt. ex Gray var. californicum, L. californicum var. arizonicum A. Gray, L. californicum var. interior Chiang, L. carolinianum var. quadrifidum (Moc. & Sessé ex Dun. ) C. L. Hitchc., L. cooperi A. Gray, L. macrodon A. Gray var. macrodon, L. nodosum var. isthmense ( Chiang) Chiang, L. pallidum Miers var. pallidum, L. parishii A. Gray var. parishii, L. parishii var. modestum (l. M. Johnst.) Chiang, L. puberulum var. berberidoides ( Correll) Chiang y L. torreyi A. Gray. Se encontraron números cromosómicos de n = 12, 24, 48, 60, y 2n = 24. Se concluye que x = 12 es el número cromosómico básico de Lycium. Se discute el origen de n = 18, reportado antes de este estudio.
Musgos de la Península de Yucatán, México. II.
Authors: Delgadillo Claudio , Cárdenas Ángeles
Published: January 2019

Entre quince nuevos registros estatales, cinco no eran conocidos para la Península de Yucatán; Pilosium chlorophyllum es además, nuevo para la flora de musgos de México.
Mimosa martindelcapoi Medrano (Leguminosae), una especie nueva del sudoeste de Tamaulipas, México
Authors: González-Medrano Francisco
Published: January 2019

Mimosa martindelcampoi (Leguminosae) se describe como nueva especie procedente del sudoeste de Tamaulipas. Esta especie está cercanamente relacionada con Mimosa leucaenoides Benth., pero el número de estambres y folíolos es diferente, M. leucaenoides tiene 8 estambres y la nueva especie tiene 10. Actualmente la nueva especie solo se conoce del sudoeste de Tamaulipas.
Aspectos ecológicos de Mimosa biuncifera y Mimosa monancistra en el Noroeste del Estado de Guanajuato
Authors: Grether Rosaura
Published: January 2019

Se estudian algunos aspectos de la ecología de Mimosa biuncifera Bentham y Mimosa monancistra Bentham en el noroeste del estado de Guanajuato relacionando su distribución con el clima, el suelo y la topografía; se proporciona información sobre su fenología y medios de dispersión, y se hacen comentarios de las comunidades vegetales de las que forman parte. Se discute La abundancia relativa de estas especies en comunidades secundarias, poniendo de manifiesto el valor indicador del disturbio humano que en un momento dado pueden tener. Se discute también la posibilidad de utilizar estas especies para proporcionar cierta ayuda en el restablecimiento del suelo de algunas zonas semiáridas de la parte central de la República Mexicana
Noeplingia Ramamoorthy, Hiriart & Medrano (Labiatae) un nuevo género de Hidalgo, México
Authors: Ramamoorthy T. P. , Hiriart-Valencia P. , González-Medrano F.
Published: January 2019

Se describe un nuevo género del estado de Hidalgo, México, Neoeplingia (Labiatae), se discuten sus relaciones con géneros aliados de la subtribu Menthoideae. Hasta ahora se conoce solamente una especie, N. leucophylloides.
Acacia velvae y A. mirandae (Leguminosae), dos nuevas especies para México
Authors: Rico-Arce Ma. de Lourdes
Published: January 2019

Se describen dos especies nuevas para el género Acacia, A. velvae y A. mirandae en México. Se dan datos ecológicos, de distribución y se discute brevemente su relación con especies cercanas.
Reseña del libro: Flora of Chiapas. Part 2 pteridophytes. Alan R. Smith. California Academy of Sciences. D. E. Breedlove (ed.). 1981. 1-370, 82 Figs.
Authors: Riba Ramón
Published: January 2019

Reseña de libro
Reseña del libro: Estudios ecológicos en el agroecosistema cafetalero. Jiménez-Avila, E. y A. Gómez-Pompa (eds.). CECSA, 1982. México, 143 p.
Authors: Chehaibar-Nader Tere
Published: January 2019

Reseña de libro
Reseña del libro: Tipos de vegetación y su distribución en el estado de Tabasco y norte de Chiapas. Mendoza, R.L. Universidad Autónoma de Chapingo, 1980. 122 p.
Authors: Orozco-Segovia Alma
Published: January 2019

Book review
Los géneros de Convolvulaceae en México
Authors: Austin D. F. , Pedraza R. A.
Published: January 2019

An artificial key for the identification of the 16 genera of Convolvulaceae found in Mexico is given. Each genus is described briefly and is accompanied by information on distribution and the number of species. Bibliography of the most recent studies of each genus is given, as well as a preliminary checklist of the 109 species now recognized for Mexico, excluding those of lpomoea which are estimated at 150.
Selaginella rzedowskii, una nueva especie de selaginela heterófila del estado de Guerrero, México
Authors: Lorea-Hernández Francisco G.
Published: January 2019

A new species of Selaginella (S. rzedowskii) is described from the state of Guerrero, Mexico. Taking into account this species, the number of heterophyllous selaginellae with dorsal rhizophores of the state has been increased to four. S. rzedowskii differs from the allied species by his affinity to warm and dry climate and by possessing median leaves neither auriculate nor peltate, lateral leaves imbricate on the stem and strobili with the basal half occupated by megasporangia.
Dos nuevas especies mexicanas de la familia Rubiaceae
Authors: Rzedowski J.
Published: January 2019

Didymaea floribunda is described on the basis of materials collected in Jalisco, Michoacan, Guerrero, State of Mexico, Morelos, Distrito Federal and Veracruz. The species is similar to the Guatemalan D. hispidula L. O. Williams. Richardia gandarae sp. n., so far only known from southwestern San Luis Potosí, seems to be related to R. tricocca ( Torr. & Gray) Standl., from Mexico and southern United States of America.
Sobre el significado del "co" en co-evolución
Authors: Dirzo Rodolfo
Published: January 2019

The concept of co-evolution was originally proposed by Ehrlich and Raven (1964) and arose from of the systematic evaluation of a series of plant families that constitute the food resource exploited by various groups of butterflies. Ehrlich and Raven concluded that the secondary metabolites of plants play a determining role in the processes of exploitation by phytophagous, and visualized a process of co-evolution in which plants and their phytophagous insecros live (in evolutionary time) continuously adapting to changes in one and the other.
Reseña del libro: El peregrinar de las flores mexicanas. José Mariano Mociño y Losada 1757-1822. P. R. Grobet, INIREB, CECSA. México, 1982. 100 p.
Authors: Pérez-Nasser Nidia
Published: January 2019

Book review
Comentario y agradecimiento
Authors: Vázquez-Yanes Carlos
Published: January 2019

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Detalles utraestructurales de la madera de algunas Boraginaceae de México
Authors: Barajas-Morales Josefina
Published: January 2019

Vestured pits and different kinds of inclusions was searched for under the scanning microscope in five species of Cordia and one of Bourreria. Calcium oxalate crystals and tyloses were found in all five species of Cordia while in B. purpusii crystals were found but not tyloses . Vestured pits were found in C. alliodora , C. elaeagnoides and B. purpussi, starch was also found in the fibres and parenchyma of C. alliodora and C. dentata.
Notas taxonómicas y observaciones sobre algunas especies mexicanas de Gnaphalium (Compositae)
Authors: Espinosa-García Francisco Javier
Published: January 2019

Some taxonomical problems related with Gnaphalium americanum Mill.; C. conoideum H.B.K.; C. liebmanii Sch. Bip. ex Klatt; C. oxyphyllum DC. and G. inornatum DC. are discussed. G. oxyphyllum var. nataliae is described as a new variety; G. panniforme. Blake is reduced to G. nubicola var. panniforme and Chionolaena sartorii Klatt is transfered to Gnaphalium sartorii.
Vegetación insular de la península de Yucatán
Authors: Flores-Guido José Salvador
Published: January 2019

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Algunos aspectos ecológicos y fitogeográficos de las especies de Cyperaceae en el Valle de México. I. Afinidades ecológicas
Authors: González-E. Socorro , Rzedowski J.
Published: January 2019

The Cyperaceae are widely distributed in the Valley of Mexico, practically in all vegetation types, but mainly in wet or inundated soil within oak forests, grasslands, pine forests, xerophilous scrubs and pine forests, in an altitudinal range of 2 230 to 4 100 m. Several are evident aquatics, like all the species of Scirpus, some of Eleocharis as well as a few of Cyperus and Carex, but there are also other adapted to conditions of reduced humidity. The reproductive phenology of most of the species is linked with the rain y season; only some of the evident aquatics can be found in flower almost the year round.
Primer registro de Elaeagia (Rubiaceae) en México, con la descripción de una nueva especie, E. uxpanapensis
Authors: Lorence David H.
Published: January 2019

Elaeagia Wedd., a genus of some 16 species belonging to the tribe Rondeletieae, is centered in South America with a single species known from Cuba. Two additional species occur in Central America, one of which, E. nitidifolia Dwyer, is known only from Panama. The other, E. auriculata Hemsl., extends as far north as Guatemala (Standley & Williams , 1975; Dwyer, 1980). Most members are large trees, some attaining 35 meters, although the Cuban species is said to be shrubby (Standley, 1921). All known species occur in montane forest at altitudes of 800 to 2 800 meters. Consequently, it was surprising to see material, apparently representing an undescribed species, from lowland tropical rain forest in SE Oaxaca and adjacent Veracruz in Mexico. However, Dr. Tom Wendt's collecting efforts towards a woody flora of the Uxpanapa Zone have yielded a number of range extensions for taxa previously known only from Central America or Chiapas. Significantly, this region lies at the northern limits of the area to be included in Flora Mesoamericana. An additional collection is known from montane forest at 1 100 m in northern Chiapas, a habitat more typical for the genus .
Algunas adiciones al género Acourtia (Compositae-Mitisieae)
Authors: Rzedowski J.
Published: January 2019

Four new species and one variety of Acourtia are described from Mexico: A. bravohollisiana, seemingly related to A. erioloma (Blake) Reveal & King and to A. scapiformis (Bacigalupi) Turner; A. discolor, perhaps akin to A. erioloma (Blake) Reveal & King; A. fragrans, similar to A. tlzurberz (Gray) Reveal & King and to A. oxylepis (Gray) Reveal & King; A. huajuapana var . actinomorpha, characterized by its regular flowers; and A. matudae, perhaps derived from A. lzebeclada DC.
El número cromosómico de Grabowskia geniculata (Solanaceae)
Authors: Chiang Fernando
Published: January 2019

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Registros nuevos de plantas acuáticas mexinas I: Myriophyllum quitense H.B.K. (Haloragaceae)
Authors: Novelo-Retana Alejandro
Published: January 2019

New from Mexican aquatic plants
Especies CAM en las selva húmeda de los Tuxtlas, Ver.
Authors: Tinoco-Ojanguren Clara , Vázquez-Yanes Carlos
Published: January 2019

Crassulaceae acid metabolism (CAM) is frequent in many plants in arid zones but can also be found in very humid environments, mainly in epiphytic and hemiepiphytic plants.
Musgos de Zacatecas, México. II.
Authors: Cárdenas-S. Ángeles , Delgadillo-M. Claudio
Published: January 2019

This paper lists 45 additions to the known moss flora of Zacatecas (México); the correct names for two previously reported taxa are also given. The total known moss flora comprises 80 species and varieties, three of which, Lindbergia brachyptera, Phascum hyalinotrichum and Pleuridium subulatum are new to the country.
Rango de hospedantes de Rhynchosporium secalis
Authors: Carvajal-Moreno Magda
Published: January 2019

A worlwide list of 75 host plants of Rhynchosporium secalis (Oud.) Davis is given, as well as a list of the grasses that are not host, and of those that are secondary hosts. The aim is to help to achieve agronomic control of this barley parasite.
Algunos aspectos ecológicos y fitogeográficos de las especies de Cyperaceae en el Valle de México. II. Análisis fitogeográfico
Authors: González-E. Socorro , Rzedowski J.
Published: January 2019

The analysis of the geographic affinities of the members of Cyperaceae belonging to the flora of the V alley of Mexico reveals that, in general terms, neotropical relationships prevail amply over the holarctic ones that were detected, while species with distribution restricted to Mexico amount to about 30% of the total number. With countries as distant as Poland and Liberia there are few species in common, although at the generic level, the similarity exceeds 50%. On a more regional scale, the cyperaceous flora of the Valley shows evident links with that of the Mexican High Plateau, but has relatively little in common with the flora of warmer parts of the country. The results support the idea of Raven and Axelrod, who claim that the family evolved initially in tropical and subtropical areas and later migrated northward and southward.
Una especie de Scutellaria (Labiatae) de Hidalgo, México
Authors: Hiriart-Valencia Patricia
Published: January 2019

A new species of Scutellaria (S. molanguitensis), section Resinosae, from the barranca de Tolantongo, Hidalgo, México, is described.
La vegetación acuática vascular de seis lagos-cráter del estado de Puebla, México
Authors: Ramírez-Gracía Pedro , Novelo-R. Alejandro
Published: January 2019

Las aguas de los seis lagos presentan una elevada concentración de sales y fueron divididos en dos grupos de acuerdo a la concentración de las mismas: el primero, denominado "concentrados" o "salinos'', formado por los lagos Alchichica y Atexcac y el segundo, denominado "diluidos", formado por los cuatro lagos restantes. La flora acuática está representada por catorce especies de angiospermas, pertenecientes a trece géneros y nueve familias. La poca diversidad de especies presentes en estos lagos se debe principalmente a las altas concentraciones iónicas del agua y secundariamente al pobre contenido de nutrientes en los sedimentos. La distribución de las especies en los lagos está influida fundamentalmente por los fuertes vientos comúnmente secos y fríos que dominan en esta región y a las pronunciadas pendientes que rápidamente se sumergen a profundidad.
Registros nuevos de plantas acuáticas mexicanas II: Luziola subintegra Swallen y L. spruceana Benth. ex Doell. (Gramineae)
Authors: Novelo-R. Alejandro
Published: January 2019

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Reseña del libro: Malezas de Buenavista, Coahuila. José A. Villarreal Q. (ed.). Universidad Autónoma Agrícola Antonio Narro. Buenavista, Saltillo, México. 1983. 271 p.
Authors: Espinosa-García Francisco J.
Published: January 2019

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Editorial
Authors: Lot-Helgueras Antonio
Published: January 2019

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Notas sobre la ecología reproductiva de árboles en un bosque mesófilo de montaña en Michoacán, México
Authors: Hernández Héctor M. , Carreón-Abud Yasmín
Published: January 2019

Se describen algunos eventos reproductivos de los principales elementos arbóreos de un bosque mesófilo de montaña, y se complementa esta información con datos sobre algunas especies arbustivas y herbáceas. La floración de los árboles resultó ser fuertemente estacional, con un marcado pico en las interfases sequía-lluvias y lluvias-sequía, mientras que las especies arbustivas y herbáceas florecieron básicamente durante la estación húmeda. Todas las especies arbóreas, con excepción de Cornus disciflora, poseen niveles relativamente altos de autocompatibilidad. Se considera que la elevada incidencia de este sistema de reproducción es un mecanismo adaptativo que aumenta las posibilidades de éxito reproductivo de las especies en ausencia de polinizadores eficientes. La melitofilia es el síndrome de polinización más común, aunque existen otros representados como anemofilia, ornitofilia y esfingofilia. Finalmente se discuten los rasgos reproductivos generales del bosque, y se comparan con la naturaleza reproductiva de comunidades vegetales de climas templados y tropicales.
New taxa in Mexican Psychotria (Rubiaceae, Psychotrieae)
Authors: Lorence David H. , Dwyer John D.
Published: January 2019

Six new taxa in Psychotria subgenus Heteropsychotria are described from Mexico: P. faxlucens Lorence & Dwyer, P. izabalensis L. Wms. subsp. oaxacana Lorence, P. luteotuba Lorence, P. megalantha Lorence, P. sousae Lorence, and P. veracruzensis Lorence & Dwyer.
Nota sobre la distribución de Savia sessilifiora (Euphorbiaceae) en México
Authors: Lott Emily J.
Published: January 2019

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Lectotipificación de Limnocharis laforestii Duchass. ex Griseb. (Limnocharitaceae)
Authors: Novelo-R. Alejandro
Published: January 2019

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Reconocimiento florístico y consideraciones fitogeográficas del bosque mesófilo de montaña de Teocelo, Veracruz
Authors: Luna Isolda , Almeida Lucía , Villers Lourdes , Lorenzo Lila
Published: January 2019

Se efectúa un reconocimiento florístico en una comunidad de bosque mesófilo de montaña en la región de Teocelo, Ver., se incluye una lista florística de la flora vascular constituida por 84 familias, 176 géneros y 277 especies. Se determinan seis elementos florísticos geográficos, tomándose en cuenta únicamente el área de distribución de los géneros (pantropical, neotropical, tropical asiático, tropical africano, holártico y cosmopolita). El elemento tropical es el mejor representado en todos los estratos estudiados y cuantitativamente el más importante (79%). Se compara la localidad de estudio a nivel de género con otras de los estados de la República que poseen bosque mesófilo, encontrándose que es más semejante a las localidades del centro de Veracruz y de Chiapas. Asimismo, se le compara con cinco localidades típicas por medio del Índice de Similitud de Sorensen y se encontró que es más afín con algunas áreas de Guerrero. Se concluye que las proporciones de elementos encontradas en este tipo de vegetación se deben a la compleja y larga historia terciaria y cuaternaria a la que ha estado sometida. Su estudio resulta urgente, debido a la rápida degradación causada por el hombre.
Métodos computarizados y algunas de sus aplicaciones al estudio de la flora de México
Authors: Moreno Nancy P. , Allkin Robert
Published: January 2019

El uso de las bases de datos computarizadas puede ser una alternativa viable para apoyar el estudio de la flora de México; sin embargo, hay pocos trabajos escritos en español sobre el tema. Aquí se pretende dar una introducción al área, presentando los tres tipos de bases de datos aplicables en general a estudios florísticos: 1) bases curatoriales, con datos de etiquetas de ejemplares de herbario; 2) bases bibliográficas, con datos acerca de la literatura taxonómica, y 3) bases descriptivas, las cuales contienen descripciones de los organismos mismos. Estas últimas facilitan la producción de medios auxiliares para la identificación, la publicación de descripciones taxonómicas o el acceso a cualquier subconjunto de la información almacenada en la computadora.
Estudios citogenéticos de dos especies y una variedad del género Nyctocereus (Cactaceae)
Authors: Palomino-Hasbach Guadalupe , Zuleta-Lechuga Socorro , Scheinvar Leia
Published: January 2019

Nyctocereus (Cactaceae) es un género con siete especies y dos variedades distribuidas de México a Centroamérica, todas son ornamentales y sus frutos son comestibles. En este estudio se determinaron los números cromosómicos y se elaboraron los cariotipos de N. castellanosii, N. serpentinus y N. serpentinus var . splendens . El número cromosómico para los tres taxa fue 2n = 22 y el número básico x = 11. Entre ellos el cariotipo es muy homogéneo. No se observaron poliploidías. Todos los cromosomas en N. castellanosii y N. serpentinus fueron metacéntricos. En N. serpentinus var. Splendens se obtuvieron dos partes de submetacéntricos. La longitud total de la cromatina fue diferente en las tres especies, presentando la menor longitud N. serpentinus var. splendens.
Estudio biosistemático de Eragrostis mexicana , Eragrostis neomexicana , E. orcuttiana y E. virescens (Gramineae; Chloridoideae)
Authors: Sánchez-Vega Isidoro , Koch Stephen D.
Published: January 2019

Se ha revisado la variación morfológica de las especies Eragrostis mexicana (Hornem.) Link, E. neomexicana Vasey, E. orcuttiana Vasey y E. virescens Presl. Con base en la altura de la planta, el color de la espiguilla, la distribución de glándulas en la planta, el ancho de la espiguilla, la longitud de la gluma inferior y la correlación entre estos dos últimos caracteres, se concluyó que el grupo estudiado constituye una sola especie, diferenciada en dos subespecies. Las especies reconocidas tradicionalmente son transferidas a E. mexicana subesp. mexicana ( E. mexicana y E. neomexicana ) y E. mexicana subesp. virescens. (Presl) S.D. Koch et I. Sánchez V. ( E. orcuttiana y E. virescens ). Se reporta por primera vez el número cromosómico de E. mexicana subesp. virescens como 2n = 60.
El maguey ( Agave , subgénero Agave en el altiplano potosino-zacatecano)
Authors: Tello-Balderas J. Jesús , García-Moya Edmundo
Published: January 2019

Esta investigación concierne a la identidad taxonómica, distribución geográfica y ecológica regionales, las formas de utilización y el conocimiento empírico de los agaves del subgénero Agave en San Luis Potosí y Zacatecas. Se encontraron las siguientes especies y subespecies silvestres: Agave salmiana ssp. crassispina y A. scabra ssp. potosiensis ; A. parrasana ; semicultivadas : A. americana var. oaxacensis ; cultivadas: A. mapisaga var. mapisaga y A. salmiana var. salmiana (tres formas). A. salmiana ssp. Crassispina es la más ampliamente distribuida y la más abundante. Se desarrolla entre 1 800 y 2 400 msnm; en sustratos coluvio-aluvial (ígneo y sedimentario); suelo litosol eútrico. Es elemento importante del matorral crasicaule y matorral micrófilo. Es la única especie utilizada en la elaboración de mezcal y quiote, y es la utilizada en mayor cantidad como forraje. Tiene otros usos. A. mapisaga var. mapisaga y A. salmiana var. salmiana , se cultivan principalmente al NNW de la ciudad de San Luis Potosí, a 1 880 msnm; sustrato aluvial; xerosol háplico; matorral crasicaule deteriorado; son utilizados principalmente en la extracción de aguamiel para pulque, forraje, elaboración de miel de aguamiel, construcción, ornamental y cercas vivas. Existe conocimiento empírico para un manejo favorable del recurso, pero debido a diversas situaciones, su aplicación actual es reducida.
Reducción en la fecundidad en Manfreda brachystachya (Cav.) Rose, una agavácea polinizada por murciélagos: los riesgos de la especialización en la polinización.
Authors: Eguiarte Luis E. , Búrquez Alberto
Published: January 2019

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Nota sobre la identidad del tepescohuite en México
Authors: Grether Rosaura
Published: January 2019

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La fisiología ecológica de plantas
Authors: Vazquez-Yanes Carlos
Published: January 2019

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