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https://www.readbyqxmd.com/read/28813101/forage-potential-of-native-ecotypes-of-paspalum-notatum-and-p-guenoarum
#1
Marcelo G Steiner, Miguel Dall'agnol, Carlos Nabinger, Simone M Scheffer-Basso, Roberto L Weiler, Carine Simioni, Maria Teresa Schifino-Wittmann, Éder A M DA Motta
The Paspalum genus includes several species that are important for livestock in Rio Grande do Sul, such as P. notatum and P. guenoarum, typical of native pastures of the Pampa biome. The aim of this study was to investigate forage production and chemical composition of four ecotypes of these species in relation to the cv. 'Pensacola' (P. notatum). Ecotypes of P. guenoarum (Azulão and Baio) and P. notatum (André da Rocha and Bagual) and the cv. 'Pensacola' were evaluated for two years, during which four cuts/year were made...
August 14, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28812976/learning-and-recognition-of-tactile-temporal-sequences-by-mice-and-humans
#2
Michael R Bale, Malamati Bitzidou, Anna Pitas, Leonie S Brebner, Lina Khazim, Stavros T Anagnou, Caitlin D Stevenson, Miguel Maravall
The world around us is replete with stimuli that unfold over time. When we hear an auditory stream like music or speech or scan a texture with our fingertip, physical features in the stimulus are concatenated in a particular order. This temporal patterning is critical to interpreting the stimulus. To explore the capacity of mice and humans to learn tactile sequences, we developed a task in which subjects had to recognise a continuous modulated noise sequence delivered to whiskers or fingertips, defined by its temporal patterning over hundreds of milliseconds...
August 16, 2017: ELife
https://www.readbyqxmd.com/read/28812745/hysteresis-and-bonding-reconstruction-in-the-pressure-induced-b3-b1-phase-transition-of-3c-sic
#3
Miguel A Salvadó, R Franco, Pilar Pertierra, T Ouahrani, J M Recio
The determination of kinetic factors affecting phase metastability is crucial for the design of materials out of the ambient conditions. At a given temperature, the kinetic barrier associated with the reconstruction of the bonding network of a pressure-induced phase transition can be only overcome at pressures where the available vibrational energy of the system is equal or higher than the corresponding activation energy. Our work demonstrates that these pressures provide boundaries to hysteresis cycles that can be evaluated following a three-step computational strategy: (i) total energy electronic structure calculations, (ii) determination of vibrational contributions by means of a simple Debye model, and (iii) description of the energetic profile along the transition path in the framework of the martensitic approximation...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28812705/functional-trait-diversity-maximizes-ecosystem-multifunctionality
#4
Nicolas Gross, Yoann Le Bagousse-Pinguet, Pierre Liancourt, Miguel Berdugo, Nicholas J Gotelli, Fernando T Maestre
Understanding the relationship between biodiversity and ecosystem functioning has been a core ecological research topic over the past decades. Although a key hypothesis is that the diversity of functional traits determines ecosystem functioning, we do not know how much trait diversity is needed to maintain multiple ecosystem functions simultaneously (multifunctionality). Here, we uncovered a scaling relationship between the abundance distribution of two key plant functional traits (specific leaf area, maximum plant height) and multifunctionality in 124 dryland plant communities spread over all continents except Antarctica...
April 18, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812667/greening-peace-in-colombia
#5
Brigitte Baptiste, Miguel Pinedo-Vasquez, Victor H Gutierrez-Velez, Germán I Andrade, Pablo Vieira, Lina M Estupiñán-Suárez, Maria C Londoño, William Laurance, Tien Ming Lee
No abstract text is available yet for this article.
March 1, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812618/plant-spatial-patterns-identify-alternative-ecosystem-multifunctionality-states-in-global-drylands
#6
Miguel Berdugo, Sonia Kéfi, Santiago Soliveres, Fernando T Maestre
The response of drylands to environmental gradients can be abrupt rather than gradual. These shifts largely occur unannounced and are difficult to reverse once they happen; their prompt detection is of crucial importance. The distribution of vegetation patch sizes may indicate the proximity to these shifts, but the use of this metric is hampered by a lack of large-scale studies relating these distributions to the provision of multiple ecosystem functions (multifunctionality) and comparing them to other ecosystem attributes, such as total plant cover...
January 9, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812617/improved-tree-ring-archives-will-support-earth-system-science
#7
Flurin Babst, Benjamin Poulter, Paul Bodesheim, Miguel D Mahecha, David C Frank
No abstract text is available yet for this article.
January 24, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812611/divergent-demographic-strategies-of-plants-in-variable-environments
#8
Jenni L McDonald, Miguel Franco, Stuart Townley, Thomas H G Ezard, Kim Jelbert, Dave J Hodgson
One of the best-supported patterns in life history evolution is that organisms cope with environmental fluctuations by buffering their most important vital rates against them. This demographic buffering hypothesis is evidenced by a tendency for temporal variation in rates of survival and reproduction to correlate negatively with their contribution to fitness. Here, we show that widespread evidence for demographic buffering can be artefactual, resulting from natural relationships between the mean and variance of vital rates...
January 13, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812604/stand-age-and-species-richness-dampen-interannual-variation-of-ecosystem-level-photosynthetic-capacity
#9
Talie Musavi, Mirco Migliavacca, Markus Reichstein, Jens Kattge, Christian Wirth, T Andrew Black, Ivan Janssens, Alexander Knohl, Denis Loustau, Olivier Roupsard, Andrej Varlagin, Serge Rambal, Alessandro Cescatti, Damiano Gianelle, Hiroaki Kondo, Rijan Tamrakar, Miguel D Mahecha
The total uptake of carbon dioxide by ecosystems via photosynthesis (gross primary productivity, GPP) is the largest flux in the global carbon cycle. A key ecosystem functional property determining GPP is the photosynthetic capacity at light saturation (GPPsat), and its interannual variability (IAV) is propagated to the net land-atmosphere exchange of CO2. Given the importance of understanding the IAV in CO2 fluxes for improving the predictability of the global carbon cycle, we have tested a range of alternative hypotheses to identify potential drivers of the magnitude of IAV in GPPsat in forest ecosystems...
January 23, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812460/myopathic-mtdna-depletion-syndrome-due-to-mutation-in-tk2-gene
#10
Elena Martín-Hernández, María Teresa García-Silva, Pilar Quijada-Fraile, María Elena Rodríguez-García, Henry Rivera, Aurelio Hernández-Laín, David Coca-Robinot, Joaquín Fernández-Toral, Joaquín Arenas, Miguel A Martín, Francisco Martínez-Azorín
Whole-exome sequencing was used to identify the disease gene(s) in a Spanish girl with failure to thrive, muscle weakness, mild facial weakness, elevated creatine kinase, deficiency of mitochondrial complex III and depletion of mtDNA. With whole-exome sequencing data, it was possible to get the whole mtDNA sequencing and discard any pathogenic variant in this genome. The analysis of whole exome uncovered a homozygous pathogenic mutation in thymidine kinase 2 gene ( TK2; NM_004614.4:c.323 C>T, p.T108M)...
September 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28812056/initiating-a-standardized-regional-referral-and-counter-referral-system-in-guatemala-a-mixed-methods-study
#11
Rupa Kapoor, Leslie Avendaño, Maria Antonieta Sandoval, Andrea T Cruz, Esther M Sampayo, Miguel A Soto, Elizabeth A Camp, Heather L Crouse
Background:Few data exist for referral processes in resource-limited settings. We utilized mixed-methods to evaluate the impact of a standardized algorithm and training module developed for locally identified needs in referral/counter-referral procedures between primary health centers (PHCs) and a Guatemalan referral hospital. Methods: PHC personnel and hospital physicians participated in surveys and focus groups pre-implementation and 3, 6, and 12 months post-implementation to evaluate providers' experience with the system...
2017: Global Pediatric Health
https://www.readbyqxmd.com/read/28811937/association-between-salivary-leptin-levels-and-taste-perception-in-children
#12
Lénia Rodrigues, Rosa Espanca, Ana Rodrigues Costa, Célia Miguel Antunes, Clarinda Pomar, Fernando Capela-Silva, Cristina Conceição Pinheiro, Francisco Amado, Elsa Lamy
The satiety inducing hormone leptin acts not only at central nervous system but also at peripheral level. Leptin receptors are found in several sense related organs, including the mouth. A role of leptin in sweet taste response has been suggested but, until now, studies have been based on in vitro experiments, or in assessing the levels of the hormone in circulation. The present study investigated whether the levels of leptin in saliva are related to taste perception in children and whether Body Mass Index (BMI) affects such relationship...
2017: Journal of Nutrition and Metabolism
https://www.readbyqxmd.com/read/28811206/production-and-physicochemical-properties-of-carboxymethyl-cellulose-films-enriched-with-spent-coffee-grounds-polysaccharides
#13
Lina F Ballesteros, Miguel A Cerqueira, José A Teixeira, Solange I Mussatto
Extracts rich in polysaccharides were obtained by alkali pretreatment (PA) or autohydrolysis (PB) of spent coffee grounds, and incorporated into a carboxymethyl cellulose (CMC)-based film aiming at the development of bio-based films with new functionalities. Different concentrations of PA or PB (up to 0.20% w/v) were added to the CMC-based film and the physicochemical properties of the final films were determined. Scanning electronic microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, as well as determinations of optical and mechanical properties, moisture content, solubility, water vapor permeability, contact angle and sorption isotherms were performed...
August 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28811092/direct-oral-anticoagulants-in-patients-with-hypertrophic-cardiomyopathy-and-atrial-fibrillation
#14
Fernando Dominguez, Vicente Climent, Esther Zorio, Tomás Ripoll-Vera, Joel Salazar-Mendiguchía, Jose Manuel García-Pinilla, Jose Angel Urbano-Moral, Xusto Fernández-Fernández, David Lopez-Cuenca, Raquel Ajo-Ferrer, Jorge Sanz-Sanchez, Yolanda Gomez-Perez, Miguel A López-Garrido, Roberto Barriales-Villa, Juan Ramón Gimeno, Pablo Garcia-Pavia
BACKGROUND: Chronic anticoagulation with vitamin K antagonists (VKAs) is recommended in patients with hypertrophic cardiomyopathy (HCM) and atrial fibrillation (AF). Direct oral anticoagulants (NOACs) are an alternative to VKAs but there are limited data to support their use in HCM. We sought to describe the pattern of use, thromboembolic events, bleeding and quality of life in patients with HCM and AF treated with NOACs. METHODS: Data from patients treated with NOACs (n=99) and VKA (n=433) at 9 inherited cardiac diseases units were retrospectively collected...
August 7, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28810879/quantification-of-mutant-spop-proteins-in-prostate-cancer-using-mass-spectrometry-based-targeted-proteomics
#15
Hui Wang, Christopher E Barbieri, Jintang He, Yuqian Gao, Tujin Shi, Chaochao Wu, Athena A Schepmoes, Thomas L Fillmore, Sung-Suk Chae, Dennis Huang, Juan Miguel Mosquera, Wei-Jun Qian, Richard D Smith, Sudhir Srivastava, Jacob Kagan, David G Camp, Karin D Rodland, Mark A Rubin, Tao Liu
BACKGROUND: Speckle-type POZ protein (SPOP) is an E3 ubiquitin ligase adaptor protein that functions as a potential tumor suppressor, and SPOP mutations have been identified in ~10% of human prostate cancers. However, it remains unclear if mutant SPOP proteins can be utilized as biomarkers for early detection, diagnosis, prognosis or targeted therapy of prostate cancer. Moreover, the SPOP mutation sites are distributed in a relatively short region with multiple lysine residues, posing significant challenges for bottom-up proteomics analysis of the SPOP mutations...
August 15, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28810510/estimation-of-caffeine-intake-from-analysis-of-caffeine-metabolites-in-wastewater
#16
Emma Gracia-Lor, Nikolaos I Rousis, Ettore Zuccato, Richard Bade, Jose Antonio Baz-Lomba, Erika Castrignanò, Ana Causanilles, Félix Hernández, Barbara Kasprzyk-Hordern, Juliet Kinyua, Ann-Kathrin McCall, Alexander L N van Nuijs, Benedek G Plósz, Pedram Ramin, Yeonsuk Ryu, Miguel M Santos, Kevin Thomas, Pim de Voogt, Zhugen Yang, Sara Castiglioni
Caffeine metabolites in wastewater were investigated as potential biomarkers for assessing caffeine intake in a population. The main human urinary metabolites of caffeine were measured in the urban wastewater of ten European cities and the metabolic profiles in wastewater were compared with the human urinary excretion profile. A good match was found for 1,7-dimethyluric acid, an exclusive caffeine metabolite, suggesting that might be a suitable biomarker in wastewater for assessing population-level caffeine consumption...
August 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28810438/patients-with-limited-communication-in-end-of-life-situations-initial-psychometric-properties-of-a-discomfort-observation-scale
#17
Ana Lucila Soto-Rubio, José Manuel Tomás Miguel, Marián Pérez-Marín, Pilar Barreto Martín
This work presents an observational scale which takes into account different observable indicators of discomfort of patients in end-of-life situations with difficulties in communicating due to cognitive impairment, fatigue or sedation and provides details of its validation. In all, 71 adults participated. Model fit was adequate ( χ(2)(27) = 43.28, p = .024, comparative fit index = .975, root mean square error of approximation = .092 and confidence interval 90% (.033-.140)). Alpha coefficient was ...
March 1, 2017: Journal of Health Psychology
https://www.readbyqxmd.com/read/28810184/design-and-evaluation-of-a-parametric-model-for-cardiac-sounds
#18
Roilhi F Ibarra-Hernández, Miguel A Alonso-Arévalo, Alejandro Cruz-Gutiérrez, Ana L Licona-Chávez, Salvador Villarreal-Reyes
Heart sound analysis plays an important role in the auscultative diagnosis process to detect the presence of cardiovascular diseases. In this paper we propose a novel parametric heart sound model that accurately represents normal and pathological cardiac audio signals, also known as phonocardiograms (PCG). The proposed model considers that the PCG signal is formed by the sum of two parts: one of them is deterministic and the other one is stochastic. The first part contains most of the acoustic energy. This part is modeled by the Matching Pursuit (MP) algorithm, which performs an analysis-synthesis procedure to represent the PCG signal as a linear combination of elementary waveforms...
August 9, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28809959/expression-and-activity-of-angiotensin-regulating-enzymes-is-associated-with-prognostic-outcome-in-clear-cell-renal-cell-carcinoma-patients
#19
Peio Errarte, Maider Beitia, Itxaro Perez, Lorea Manterola, Charles H Lawrie, Jon Danel Solano-Iturri, Julio Calvete-Candenas, Miguel Unda, José I López, Gorka Larrinaga
The discovery of the intrarenal renin-angiotensin system (iRAS), which regulates angiogenesis, cell differentiation and proliferation, has opened new perspectives in the knowledge of kidney carcinogenesis. In this study we analyzed the immunohistochemical expression and fluorimetric activity of four key peptidases of iRAS in tumor tissue (n = 144) and serum samples (n = 128) from patients with renal neoplasms. Neutral endopeptidase (NEP/CD10), Angiotensin-converting enzyme-2 (ACE2), and aminopeptidase A (APA) were expressed in tumor cells whilst Angiotensin-converting enzyme (ACE) was expressed in the endothelial cells of intratumor blood vessels...
2017: PloS One
https://www.readbyqxmd.com/read/28809783/role-of-omentin-vaspin-cardiotrophin-1-tweak-and-nov-ccn3-in-obesity-and-diabetes-development
#20
REVIEW
Xavier Escoté, Saioa Gómez-Zorita, Miguel López-Yoldi, Iñaki Milton-Laskibar, Alfredo Fernández-Quintela, J Alfredo Martínez, María J Moreno-Aliaga, María P Portillo
Adipose tissue releases bioactive mediators called adipokines. This review focuses on the effects of omentin, vaspin, cardiotrophin-1, Tumor necrosis factor-like Weak Inducer of Apoptosis (TWEAK) and nephroblastoma overexpressed (NOV/CCN3) on obesity and diabetes. Omentin is produced by the stromal-vascular fraction of visceral adipose tissue. Obesity reduces omentin serum concentrations and adipose tissue secretion in adults and adolescents. This adipokine regulates insulin sensitivity, but its clinical relevance has to be confirmed...
August 15, 2017: International Journal of Molecular Sciences
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