Navegação Ciências Biológicas por Título
Resultados 2929-2948 de 3043
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Two new species of Odontostilbe historically hidden under O. microcephala (Characiformes: Cheirodontinae)
(2018) [Artigo de periódico]Specimens historically identified as Odontostilbe microcephala from the upper rio Paraná and Andean piedmont tributaries of the río Paraguay are reviewed and split in three species. We found that the distribution of O. ... -
Two new troglobitic species of Scleropactidae (Crustacea: Isopoda: Oniscidea) from Pará, Brazil
(2011) [Artigo de periódico]The South America Scleropactidae includes 53 nominal species distributed in 14 genera. In Brazil, there are 16 species recorded in the north and southeast regions. Here, two new species of Scleropactidae are described based ... -
A two-step workflow based on plasma p-tau217 to screen for amyloid β positivity with further confirmatory testing only in uncertain cases
(2023) [Artigo de periódico]Cost-effective strategies for identifying amyloid-β (Aβ) positivity in patients with cognitive impairment are urgently needed with recent approvals of anti-Aβ immunotherapies for Alzheimer’s disease (AD). Blood biomarkers ... -
A two-tier bioinformatic pipeline to develop probes for target capture of nuclear loci with applications in Melastomataceae
(2020) [Artigo de periódico]Putatively single-copy nuclear (SCN) loci, which are identified using genomic resources of closely related species, are ideal for phylogenomic inference. However, suitable genomic resources are not available for many clades, ... -
Tympanic membrane retractions in patients with Williams Syndrome : a controlled study
(2021) [Artigo de periódico]Introduction The role of elastin in tympanic retractions and chronic otitis media is not well established. Williams Syndrome (WS), a pathology related to a mutation in the elastin gene, could generate tympanic retractions. ... -
Type 2 deiodinase Thr92Ala polymorphism is not associated with cognitive impairment in older adults : a cross-sectional study
(2022) [Artigo de periódico]Background: Type 2 Deiodinase (DIO2) converts thyroxine (T4) into the active hormone triiodothyronine (T3). Thr92Ala DIO2 polymorphism has been associated with reduced conversion of T4 into T3 and central nervous system ... -
Ultrastructural analysis of the dorsal body gland of the terrestrial snail Megalobulimus abbreviatus (Becquaert, 1948)
(2010) [Artigo de periódico]Foi analisada a ultraestrutura da glândula reprodutiva corpo dorsal (CD) de Megalobulimus abbreviatus. Imunoistoquímica para microscopia eletrônica foi utilizada para detectar peptídeos relacionados ao tetrapeptídeo FMRFamida ... -
Understanding Brazil’s catastrophic fires : causes, consequences and policy needed to prevent future tragedies
(2021) [Artigo de periódico]Brazil has experienced unprecedented wildfires in the last decade. Images ofimmense burnt areas or dead animals that failed to escape the 2020 wildfires have shocked the world. To prevent or minimize further similardisasters ... -
Understanding the early presentation of mucopolysaccharidoses disorders : results of a systematic literature review and physician survey
(2018) [Artigo de periódico]As therapies are developed for rare disorders, challenges of early diagnosis become particularly relevant. This article focuses on clinical recognition of mucopolysaccharidoses (MPS), a group of rare genetic diseases related ... -
Uniparental genetic markers in South Amerindians
(2012) [Artigo de periódico]A comprehensive review of uniparental systems in South Amerindians was undertaken. Variability in the Y-chromosome haplogroups were assessed in 68 populations and 1,814 individuals whereas that of Y-STR markers was assessed ... -
Uniparental (mtDNA, Y-chromosome) polymorphisms in French Guiana and two related populations : implications for the region's colonization
(2007) [Artigo de periódico]Blood samples collected in four Amerindian French Guiana populations (Palikur, Emerillon, Wayampi and Kali’na) in the early 1980s were screened for selected mtDNA and Y-chromosome length polymorphisms, and sequenced for ... -
Universal tick vaccines : candidates and remaining challenges
(2023) [Artigo de periódico]Recent advancements in molecular biology, particularly regarding massively parallel sequencing technologies, have enabled scientists to gain more insight into the physiology of ticks. While there has been progress in ... -
Unmet needs in countries participating in the undiagnosed diseases network international : an international survey considering national health care and economic indicators
(2022) [Artigo de periódico]Background: Patients, families, the healthcare system, and society as a whole are all significantly impacted by rare diseases (RDs). According to various classifications, there are currently up to 9,000 different rare ... -
Unraveling oxidative stress response in the cestode parasite Echinococcus granulosus
(2019) [Artigo de periódico]Cystic hydatid disease (CHD) is a worldwide neglected zoonotic disease caused by Echinococcus granulosus. The parasite is well adapted to its host by producing protective molecules that modulate host immune response. An ... -
Unraveling rice tolerance mechanisms against schizotetranychus oryzae mite infestation
(2018) [Artigo de periódico]Rice is the staple food for over half of the world’s population. Infestation of Schizotetranychus oryzae (Acari: Tetranychidae) causes great losses in rice productivity. To search for rice genotypes that could better ... -
Unravelling MADS-box gene family in Eucalyptus spp. : a starting point to an understanding of their developmental role in trees
(2005) [Artigo de periódico]MADS-box genes encode a family of transcription factors which control diverse developmental processes in flowering plants ranging from root to flower and fruit development. Members of the MADS-box gene family share a highly ... -
Unravelling the transcriptome profile of the swine respiratory tract mycoplasmas
(2014) [Artigo de periódico]The swine respiratory ciliary epithelium is mainly colonized by Mycoplasma hyopneumoniae, Mycoplasma flocculare and Mycoplasma hyorhinis. While colonization by M. flocculare is virtually asymptomatic, M. hyopneumoniae and ... -
Unrevealing Parasitic Trophic Interactions— A Molecular Approach for Fluid-Feeding Fishes
(2018) [Artigo de periódico]Fish diets have been traditionally studied through the direct visual identification of food items found in their stomachs. Stomach contents of Vandeliinae and Stegophilinae (family Trichomycteridae) parasite catfishes, ... -
Unveiling fungal community structure along different levels of anthropic disturbance in a South American subtropical lagoon
(2023) [Artigo de periódico]Studies of fungal communities through amplicon metagenomics in aquatic environments, particularly in freshwater ecosystems, are still relatively recent. Unfortunately, many of these water bodies are facing growing threats ... -
Unveiling the germination requirements for Cereus hildmannianus (Cactaceae), a potential new crop from southern and southeastern Brazil
(2021) [Artigo de periódico]Cereus hildmannianus K. Schum is a columnar cactus native to South and Southeast Brazil. The cultivation of this species seems justifiable for several reasons: its fruits are spineless and edible; it is not threatened with ...