20 research outputs found
Diversity of cyperaceae in Brazil
The purpose of this catalogue was to combine the available data from
publications, theses, databases, and herbarium specimens from around 120 Herbaria, and colections sampled
in Brazilian vegetation during the last 15 years to produce the most complete list, as possible as, of Cyperaceae
species for Brazil. We catalogued ca. 1,700 names for 678 species in 42 genera occurring in Brazil. These
values represent ca. 15 percent of the species and 40 percent of the genera found in the world. Both subfamilies
of Cyperaceae are found in Brazil with Cyperoideae being the most diverse at both generic and specific levels.
Although lower species were recorded for the tribes Cryptangieae, Sclerieae, and Trilepideae, these tribes
represent a much higher percentage of the world’s totals for genera and species. The most diverse genera are
Rhynchospora (157 spp.), Cyperus (101 spp.), Scleria (82 spp.) and Eleocharis (69 spp.). Fifteen genera have
one species in Brazil, although five of them are monospecific. The most species-rich regions in Brazil are the
North and Southeast. There are no genera endemic to Brazil. There are, however, around 200 endemic species,
of which 40 are in the genus Rhynchospora. Taxonomic and nomenclatural problems found are pointed under
the species. For each catalogued species, the principal synonyms, bibliographic references, distribution
within Brazil’s five regions, vegetation type, and citation of selected material examined are provided
Association of infantile bruxism and the terminal relationships of the primary second molars
Phylogenetic ctDNA analysis depicts early-stage lung cancer evolution.
The early detection of relapse following primary surgery for non-small-cell lung cancer and the characterization of emerging subclones, which seed metastatic sites, might offer new therapeutic approaches for limiting tumour recurrence. The ability to track the evolutionary dynamics of early-stage lung cancer non-invasively in circulating tumour DNA (ctDNA) has not yet been demonstrated. Here we use a tumour-specific phylogenetic approach to profile the ctDNA of the first 100 TRACERx (Tracking Non-Small-Cell Lung Cancer Evolution Through Therapy (Rx)) study participants, including one patient who was also recruited to the PEACE (Posthumous Evaluation of Advanced Cancer Environment) post-mortem study. We identify independent predictors of ctDNA release and analyse the tumour-volume detection limit. Through blinded profiling of postoperative plasma, we observe evidence of adjuvant chemotherapy resistance and identify patients who are very likely to experience recurrence of their lung cancer. Finally, we show that phylogenetic ctDNA profiling tracks the subclonal nature of lung cancer relapse and metastasis, providing a new approach for ctDNA-driven therapeutic studies
Synopsis of Poaceae in the grassland formations of the Parque Estadual do Guartelá, Paraná State, Brazil
ABSTRACT Poaceae is a cosmopolitan family that includes species found in both forest and grassland formations. The objective of this study was to carry out the first floristic survey of Poaceae in the Parque Estadual do Guartelá (PEG), one of the last remnants of native grassland vegetation in the State of Paraná, Brazil, and provide resources to assist the identification of genera and species. The survey was conducted based on field collections and searches in the Species Link online database. In the PEG, Poaceae is represented by 29 genera and 54 species, being Paspalum L. (eight spp.), Andropogon L. (five spp.) and Eragrostis Wolf (four spp.) the richest genera. The number of species in the PEG was incremented by 29 new records. In addition, five species were classified as exotic, five as endemic to Brazil, and two were considered least concern in relation to their conservation. We also present information regarding the distribution, habitat and conservation status for each species
Synopsis of Cyperaceae in the grasslands of Guartelá State Park, Paraná, Brazil
Abstract Cyperaceae is the third largest family among the monocotyledons and is highly represented in grassland environments. The aim of the present study was to conduct a floristic inventory of Cyperaceae in the grasslands of Guartelá State Park (GSP) and to elaborate keys to identify the species, the first for this family in this vegetation type in Paraná state. The GSP is home to relictual vegetation in Paraná, where grassland phytophysiognomies predominate, especially in open areas and rocky outcrops. The inventory was based on field collections and database searches. The family Cyperaceae is represented in the GSP by 32 taxa belonging to seven genera, with Rhynchospora (11 spp.), Bulbostylis (8 spp.), and Cyperus (7 spp.) being the genera with the greatest richness. It should be noted that all the species are native and two are endemic to Brazil. Species occurrence was recorded both in drylands and wetlands environments, emphasizing the importance of microenvironmental conservation in the park. The main literature sources for each genus, as well as information regarding distribution and habitat, are here provided
Orthodontics 42 Karyna Martins do Valle-Corotti (a) Orthodontics
Association of infantile bruxism and the terminal relationships of the primary second molars Abstract: The aim of this study was to analyze the association between infantile bruxism and the terminal relationships of the primary second molars. A total of 937 pre-school children (both genders), aged from 2 to 6 years, from municipal schools in São Paulo were evaluated. In this study, a questionnaire considering the bruxism habit and the presence of headaches and/or restless sleep was answered by the parents/guardians. A clinical exam of occlusion in the anteroposterior direction (vertical plane -VP, mesial step -MS and distal step -DS) was performed by the examiners in the school environment. Student's t test, Fisher's test and a logistic regression test were applied for the statistical analysis at a significance level of 5%. The prevalence of the bruxism habit was 29.3% among the total sample. Because there was no significant difference between the sides evaluated, the left side was taken as the standard. Among those children with bruxism, 25.7% presented a mesial step terminal relationship at the primary second molars, 29.1% had DS, and 30.2% had VP. Regarding the association of the parafunctional habit with the type of terminal relationship, no significant results were found. Children who slept restlessly or suffered from headaches were verified to show a higher chance of expressing the habit (OR = 2.4 and 1.6, respectively). The prevalence of bruxism in the studied sample was 29.3%, and its association with the primary second molars' terminal relationship was not statistically significant
Association of infantile bruxism and the terminal relationships of the primary second molars
The aim of this study was to analyze the association between infantile bruxism and the terminal relationships of the primary second molars. A total of 937 pre-school children (both genders), aged from 2 to 6 years, from municipal schools in São Paulo were evaluated. In this study, a questionnaire considering the bruxism habit and the presence of headaches and/or restless sleep was answered by the parents/guardians. A clinical exam of occlusion in the anteroposterior direction (vertical plane - VP, mesial step - MS and distal step - DS) was performed by the examiners in the school environment. Student's t test, Fisher's test and a logistic regression test were applied for the statistical analysis at a significance level of 5%. The prevalence of the bruxism habit was 29.3% among the total sample. Because there was no significant difference between the sides evaluated, the left side was taken as the standard. Among those children with bruxism, 25.7% presented a mesial step terminal relationship at the primary second molars, 29.1% had DS, and 30.2% had VP. Regarding the association of the parafunctional habit with the type of terminal relationship, no significant results were found. Children who slept restlessly or suffered from headaches were verified to show a higher chance of expressing the habit (OR = 2.4 and 1.6, respectively). The prevalence of bruxism in the studied sample was 29.3%, and its association with the primary second molars' terminal relationship was not statistically significant
Diversidade de cyperaceae no Brasil
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Previous issue date: 2009The purpose of this catalogue was to combine the available data from publications, theses, databases, and herbarium specimens from around 120 Herbaria, and colections sampled in Brazilian vegetation during the last 15 years to produce the most complete list, as possible as, of Cyperaceae species for Brazil. We catalogued ca. 1,700 names for 678 species in 42 genera occurring in Brazil. These values represent ca. 15 percent of the species and 40 percent of the genera found in the world. Both subfamilies of Cyperaceae are found in Brazil with Cyperoideae being the most diverse at both generic and specific levels. Although lower species were recorded for the tribes Cryptangieae, Sclerieae, and Trilepideae, these tribes represent a much higher percentage of the world’s totals for genera and species. The most diverse genera are Rhynchospora (157 spp.), Cyperus (101 spp.), Scleria (82 spp.) and Eleocharis (69 spp.). Fifteen genera have one species in Brazil, although five of them are monospecific. The most species-rich regions in Brazil are the North and Southeast. There are no genera endemic to Brazil. There are, however, around 200 endemic species, of which 40 are in the genus Rhynchospora. Taxonomic and nomenclatural problems found are pointed under the species. For each catalogued species, the principal synonyms, bibliographic references, distribution within Brazil’s five regions, vegetation type, and citation of selected material examined are provided.
Key words: Monocotyledons, Conservation, Cyperales, Neotropics, Taxonomy.Esta obra foi elaborada a partir da reunião de informações oriundas de publicações, teses, bancos de dados e visitas realizadas a cerca de 120 herbários, além de amostras coletadas nos últimos anos em diversos biomas no Brasil. Estão aqui catalogados cerca de 1.700 nomes para as 678 espécies registradas de Cyperaceae no Brasil e distribuídas em 42 gêneros. Estes valores representam cerca de 15% do total de espécies e 40% do total de gêneros da família ocorrentes no mundo. As duas subfamílias de Cyperaceae estão representadas no Brasil, sendo que Cyperoideae é a mais diversa em termos genéricos e específicos. No entanto, quando considerado em termos comparativos com a flora ciperológica mundial, Cryptangieae, Sclerieae e Trilepideae são as tribos com maior riqueza de gêneros e espécies no Brasil. Os gêneros com maior riqueza de espécies no Brasil são Rhynchospora Vahl (157 spp.), Cyperus L. (101 spp.), Scleria Berg. (82 espécies) e Eleocharis R. Br. (69 spp.). Quinze gêneros estão representados por apenas uma espécie no Brasil, sendo cinco deles monoespecíficos. As regiões Norte e Sudeste despontam como as de maior riqueza genérica e específica. Não foram constatados gêneros endêmicos do Brasil. Foram catalogadas cerca de 200 espécies endêmicas do país, das quais 40 pertencem a Rhynchospora. Os problemas taxonômicos e nomenclaturais encontrados estão indicados para cada espécie. Para cada espécie catalogada são apresentados os principais sinônimos, referências bibliográficas, distribuição geográfica nas cinco regiões político-geográficas do país, material examinado de referência e comentários gerais quando pertinentes
Diversity of Cyperaceae in Brazil
ABSTRACT The purpose of this catalogue was to combine the available data from publications, theses, databases, and herbarium specimens from around 120 Herbaria, and colections sampled in Brazilian vegetation during the last 15 years to produce the most complete list, as possible as, of Cyperaceae species for Brazil. We catalogued ca. 1,700 names for 678 species in 42 genera occurring in Brazil. These values represent ca. 15 percent of the species and 40 percent of the genera found in the world. Both subfamilies of Cyperaceae are found in Brazil with Cyperoideae being the most diverse at both generic and specific levels. Although lower species were recorded for the tribes Cryptangieae, Sclerieae, and Trilepideae, these tribes represent a much higher percentage of the world's totals for genera and species. The most diverse genera are Rhynchospora (157 spp.), Cyperus (101 spp.), Scleria (82 spp.) and Eleocharis (69 spp.). Fifteen genera have one species in Brazil, although five of them are monospecific. The most species-rich regions in Brazil are the North and Southeast. There are no genera endemic to Brazil. There are, however, around 200 endemic species, of which 40 are in the genus Rhynchospora. Taxonomic and nomenclatural problems found are pointed under the species. For each catalogued species, the principal synonyms, bibliographic references, distribution within Brazil's five regions, vegetation type, and citation of selected material examined are provided