Condutividade elétrica e ph da solução do solo sob fertirrigação com diferentes fontes de nitrogênio e de potássio.

Os nutrientes mais requeridos pela bananeira são o nitrogênio e o potássio. O nitrogênio é o nutriente responsável pelo aumento do número de pencas, emissão e crescimento dos rebentos, aumentando consideravelmente a quantidade total de matéria seca. Este trabalho tem por objetivo avaliar o efeito de diferentes fontes nitrogenadas e potássicas aplicadas por fertirrigação na condutividade elétrica e no pH do solo em duas profundidades. A cultivar de bananeira utilizada para o estudo foi a ?Grand Naine? com espaçamento de 2,5 x 2,5m. Os sistemas de irrigação utilizados foi o gotejamento. O delineamento experimental foi inteiramente casualizado, com seis tratamentos com quatro repetições. Os tratamentos consistiram na utilização de seis fontes de fertilizantes, três nitrogenadas (Nitrato de cálcio, Nitrato de potássio e Uréia), e três fontes potássicas (Nitrato de potássio, Cloreto de potássio e Sulfato de potássio) durante o ciclo da cultura. Os dados permitiram avaliar o comportamento das variáveis pH e CEw durante o ciclo da bananeira. Não houve tendência de redução nem aumento do pH durante o período observado, para as fontes de fertilizantes. A fertirrigação usando as diferentes fontes não resultou em níveis elevados de condutividade elétrica da solução do solo

Dependência no autocuidado dos idosos residentes em lar

O autocuidado é indispensável à conservação da vida e resulta do crescimento diário da pessoa, na experiência como cuidador de si mesmo e de quem faz parte das suas relações. É a chave dos cuidados de saúde, sendo interpretado como uma orientação para a ação de enfermagem que, através das ações de autocuidado, podem implementar intervenções para a promoção da saúde e/ou prevenção da doença. Os objetivos do estudo direcionam-se para a importância na identificação do perfil de autocuidado dos idosos, ou seja, na determinação dos diferentes níveis de dependência no autocuidado dos idosos a residir em lar. Entendemos este conhecimento, (proveniente dos resultados do estudo) como um contributo relevante no sentido de melhorar o modo como o apoio e/ou a ajuda pode ser ajustada a cada indivíduo, uma vez que estas adaptações só são possíveis perante o diagnóstico real da dependência das pessoas. Metodologia: Este estudo inclui-se num paradigma de investigação quantitativa, do tipo não experimental, transversal, descritivo e correlacional. A população em estudo são os idosos residentes no lar Residência Rainha D. Leonor em Viseu. Utilizou-se uma amostra não probabilística acidental, em função do peso relativo dos idosos desta instituição constituída por 136 idosos. O instrumento de colheita de dados inclui a escala de dependência no autocuidado. Resultados: Os idosos são maioritariamente mulheres, viúvas, com baixa instrução literária e com média de idade de 86 anos. Verificamos que as patologias predominantes são do foro cardíaco (70,6%), osteoarticular (62,5%) e neurológico (55,1%). Considerando o nível global de dependência no autocuidado, verificamos que 46,4% da amostra é independente, 36,0% é dependente em grau elevado e 17,6% dependente em grau parcial, ou seja, 53,6% apresenta algum grau de dependência no autocuidado. Conclusão: Os resultados deste estudo permitem a aquisição de conhecimento e desenvolvimento de competências que são de extrema importância na prática de cuidados de enfermagem de reabilitação, pois as necessidades de saúde desta população sofrem contínuas modificações ao longo do processo de envelhecimento, exigindo práticas atualizadas, no sentido de abranger a promoção dos processos de preservação e de autonomia. Palavras-Chave: Autocuidado, Idoso, Institucionalização.Abstract Self-care is essential to preserve life and results from person's daily growth in experience as a caregiver for himself and who is part of his relationship. It is the key of health care, being interpreted as a guideline for nursing action, which through self-care actions can implement interventions for health promotion and/or prevention of disease. The aims of the study are directed toward the importance to identify the profile of the elderly self-care, ie, for determining the different levels of dependence on self-care of the elderly to live at nursing homes. We understand this knowledge (from the study results) as an important contribution towards improving the way the support and/or help can be adjusted to each individual, as these adaptations are only possible before the realistic diagnosis of dependence people. Methodology: This study is included in a quantitative research paradigm, of non-experimental type, transversal descriptive and correlational. The study population are the elderly living in nursing home Residência Rainha D. Leonor, in Viseu. We used an accidental non probabilistic sample, depending on the relative weight of the elderly of this institution made up of 136 elderly. The data collection instrument includes the scale of dependence in self-care. Results: The elderly are mostly women, widows with low literary instruction and with an average age of 86 years. We found that the predominant pathologies are heart disorders (70.6%), osteoarticular (62.5%), and neurologic (55.1%). Considering the global dependency on self-care, we found that 46.4% of the sample is independent, 36.0% is highly dependent and 17.6% is partially dependent, ie, 53.6% of the elderly showed some degree of dependence in self-care. Conclusion: The results of this study allow the acquisition of knowledge and development of skills that are of utmost importance in the practice of rehabilitation nursing care because the health needs of this population suffers continuous changes throughout the aging process, requiring updated practices in order to promote the preservation processes and the autonomy. Keywords: Self-care, Elderly, Institution

Parâmetros estruturais da erva-sal cultivada em diferentes espaçamentos e irrigada com rejeito de dessalinizadores no semi-árido.

O objetivo do presente estudo foi avaliar os efeitos de diferentes espaçamentos sobre os parâmetros estruturais da erva-sal irrigada com rejeito de dessalinizadores

Microtensile bond strength of different adhesive systems in dentin irradiated with Er:YAG laser

The objective this study was to evaluate in vitro the bond strength of two etch-and-rise and one self-etching adhesive system after dentin irradiation with Er:YAG (erbium: yttrium aluminum garnet) laser using microtensile test. The results revealed that the groups treated with laser Er:YAG presented less tensile bond strength, independently to the adhesive system used. The prompt L-pop adhesive presented less microtensile bond strength compared to the other adhesives evaluated. There was no difference between single bond and excite groups. The adhesive failures were predominant in all the experimental groups. The Er:YAG laser influenced negatively bond strength values of adhesive systems tested in dental substrate

Transcriptome analyses identify five transcription factors differentially expressed in the hypothalamus of post-versus prepubertal Brahman heifers

Puberty onset is a developmental process influenced by genetic determinants, environment, and nutrition. Mutations and regulatory gene networks constitute the molecular basis for the genetic determinants of puberty onset. The emerging knowledge of these genetic determinants presents opportunities for innovation in the breeding of early pubertal cattle. This paper presents new data on hypothalamic gene expression related to puberty in Bos indicus (Brahman) in age-and weight-matched heifers. Six postpubertal heifers were compared with 6 prepubertal heifers using whole-genome RNA sequencing methodology for quantification of global gene expression in the hypothalamus. Five transcription factors (TF) with potential regulatory roles in the hypothalamus were identified in this experiment: E2F8, NFAT5, SIX5, ZBTB38, and ZNF605. These TF genes were significantly differentially expressed in the hypothalamus of postpubertal versus prepubertal heifers and were also identified as significant according to the applied regulatory impact factor metric (P < 0.05). Two of these 5 TF, ZBTB38 and ZNF605, were zinc fingers, belonging to a gene family previously reported to have a central regulatory role in mammalian puberty. The SIX5 gene belongs to the family of homologues of Drosophila sine oculis (SIX) genes implicated in transcriptional regulation of gonadotrope gene expression. Tumor-related genes such as E2F8 and NFAT5 are known to affect basic cellular processes that are relevant in both cancer and developmental processes. Mutations in NFAT5 were associated with puberty in humans. Mutations in these TF, together with other genetic determinants previously discovered, could be used in genomic selection to predict the genetic merit of cattle (i.e., the likelihood of the offspring presenting earlier than average puberty for Brahman). Knowledge of key mutations involved in genetic traits is an advantage for genomic prediction because it can increase its accuracy

Global differential gene expression in the pituitary gland and the ovaries of pre- and postpubertal Brahman heifers

To understand genes, pathways, and networks related to puberty, we characterized the transcriptome of two tissues: the pituitary gland and ovaries. Samples were harvested from pre-and postpubertal Brahman heifers (same age group). Brahman heifers (Bos indicus) are older at puberty compared with Bos taurus, a productivity issue. With RNA sequencing, we identified differentially expressed (DEx) genes and important transcription factors (TF) and predicted coexpression networks. The number of DEx genes detected in the pituitary gland was 284 (P < 0.05), and VWC2L was the most DEx gene (fold change = 4.12, P = 0.01). The gene VWC2L promotes bone mineralization through transforming growth factor-β (TGFβ) signaling. Further studies of the link between bone mineralization and puberty could target VWC2L. In ovaries, 3,871 genes were DEx (P < 0.05). Four highly DEx genes were noteworthy for their function: SLC6A13 (a γ-aminobutyric acid [GABA] transporter), OXT (oxytocin), and NPY (neuropeptide Y) and its receptor NPY2R. These genes had higher ovarian expression in postpubertal heifers. The GABA and its receptors and transporters were expressed in the ovaries of many mammals, suggesting a role for this pathway beyond the brain. The OXT pathway has been known to influence the timing of puberty in rats, via modulation of GnRH. The effects of NPY at the hypothalamus, pituitary gland, and ovaries have been documented. Neuropeptide Y and its receptors are known factors in the release of GnRH, similar to OXT and GABA, although their roles in ovarian tissue are less clear. Pathways previously related to puberty such as TGFβ signaling (P = 6.71 × 10), Wnt signaling (P = 4.1 × 10), and peroxisome proliferator-activated receptor (PPAR) signaling (P = 4.84 × 10) were enriched in our data set. Seven genes were identified as key TF in both tissues: HIC2, ZIC4, ZNF219, ZSCAN26, LHX1, OLIG1, and a novel gene. An ovarian subnetwork created with TF and significant ovarian DEx genes revealed five zinc fingers as regulators: ZNF507, ZNF12, ZNF512, ZNF184, and ZNF432. Recent work of hypothalamic gene expression also pointed to zinc fingers as TF for bovine puberty. Although some zinc fingers may be ubiquitously expressed, the identification of DEx genes in common across tissues points to key regulators of puberty. The hypothalamus and pituitary gland had eight DEx genes in common. The hypothalamus and ovaries had 89 DEx genes in common. The pituitary gland and ovaries had 48 DEx genes in common. Our study confirmed the complexity of puberty and suggested further investigation on genes that code zinc fingers

Infrared nanoscopy of Dirac plasmons at the graphene-SiO2 interface

We report on infrared (IR) nanoscopy of 2D plasmon excitations of Dirac fermions in graphene. This is achieved by confining mid-IR radiation at the apex of a nanoscale tip: an approach yielding two orders of magnitude increase in the value of in-plane component of incident wavevector q compared to free space propagation. At these high wavevectors, the Dirac plasmon is found to dramatically enhance the near-field interaction with mid-IR surface phonons of SiO2 substrate. Our data augmented by detailed modeling establish graphene as a new medium supporting plasmonic effects that can be controlled by gate voltage.Comment: 12 pages, 4 figure