30 research outputs found
Time-varying signal analysis to detect high-altitude periodic breathing in climbers ascending to extreme altitude
This work investigates the performance of cardiorespiratory analysis detecting periodic breathing (PB) in chest wall recordings in mountaineers climbing to extreme altitude. The breathing patterns of 34 mountaineers were monitored unobtrusively by inductance plethysmography, ECG and pulse oximetry using a portable recorder during
climbs at altitudes between 4497 and 7546 m on Mt. Muztagh Ata. The minute ventilation (VE) and heart rate (HR) signals were studied, to identify visually scored PB, applying time-varying spectral, coherence and entropy
analysis. In 411 climbing periods, 30–120 min in duration, high values of mean power (MPVE) and slope (MSlopeVE)
of the modulation frequency band of VE, accurately identified PB, with an area under the ROC curve of 88 and 89 %,
respectively. Prolonged stay at altitude was associated with an increase in PB. During PB episodes, higher peak power
of ventilatory (MPVE) and cardiac (MPLF
HR) oscillations and cardiorespiratory coherence (MPLFCoher), but reduced ventilation entropy (SampEnVE), was observed. Therefore, the characterization of cardiorespiratory dynamics by the analysis of VE and HR signals accurately identifies PB and
effects of altitude acclimatization, providing promising tools for investigating physiologic effects of environmental
exposures and diseases.Peer ReviewedPostprint (author’s final draft
Pb2+ adsorption from aqueous solutions on activated carbons obtained from lignocellulosic residues
Fungal Planet description sheets : 320–370
Novel species of fungi described in the present study include the following from Malaysia: Castanediella
eucalypti from Eucalyptus pellita, Codinaea acacia from Acacia mangium, Emarcea eucalyptigena from Eucalyptus
brassiana, Myrtapenidiella eucalyptorum from Eucalyptus pellita, Pilidiella eucalyptigena from Eucalyptus brassiana
and Strelitziana malaysiana from Acacia mangium. Furthermore, Stachybotrys sansevieriicola is described from
Sansevieria ehrenbergii (Tanzania), Phacidium grevilleae from Grevillea robusta (Uganda), Graphium jumulu from
Adansonia gregorii and Ophiostoma eucalyptigena from Eucalyptus marginata (Australia), Pleurophoma ossicola from
bone and Plectosphaerella populi from Populus nigra (Germany), Colletotrichum neosansevieriae from Sansevieria
trifasciata, Elsinoë othonnae from Othonna quinquedentata and Zeloasperisporium cliviae (Zeloasperisporiaceae
fam. nov.) from Clivia sp. (South Africa), Neodevriesia pakbiae, Phaeophleospora hymenocallidis and Phaeophleospora
hymenocallidicola on leaves of a fern (Thailand), Melanconium elaeidicola from Elaeis guineensis (Indonesia),
Hormonema viticola from Vitis vinifera (Canary Islands), Chlorophyllum pseudoglobossum from a grassland (India),
Triadelphia disseminata from an immunocompromised patient (Saudi Arabia), Colletotrichum abscissum from Citrus
(Brazil), Polyschema sclerotigenum and Phialemonium limoniforme from human patients (USA), Cadophora vitícola
from Vitis vinifera (Spain), Entoloma flavovelutinum and Bolbitius aurantiorugosus from soil (Vietnam), Rhizopogon
granuloflavus from soil (Cape Verde Islands), Tulasnella eremophila from Euphorbia officinarum subsp. echinus
(Morocco), Verrucostoma martinicensis from Danaea elliptica (French West Indies), Metschnikowia colchici from
Colchicum autumnale (Bulgaria), Thelebolus microcarpus from soil (Argentina) and Ceratocystis adelpha from
Theobroma cacao (Ecuador). Myrmecridium iridis (Myrmecridiales ord. nov., Myrmecridiaceae fam. nov.) is also
described from Iris sp. (The Netherlands). Novel genera include (Ascomycetes): Budhanggurabania from Cynodon
dactylon (Australia), Soloacrosporiella, Xenocamarosporium, Neostrelitziana and Castanediella from Acacia mangium
and Sabahriopsis from Eucalyptus brassiana (Malaysia), Readerielliopsis from basidiomata of Fuscoporia wahlbergii
(French Guyana), Neoplatysporoides from Aloe ferox (Tanzania), Wojnowiciella, Chrysofolia and Neoeriomycopsis
from Eucalyptus (Colombia), Neophaeomoniella from Eucalyptus globulus (USA), Pseudophaeomoniella from Olea
europaea (Italy), Paraphaeomoniella from Encephalartos altensteinii, Aequabiliella, Celerioriella and Minutiella from
Prunus (South Africa). Tephrocybella (Basidiomycetes) represents a novel genus from wood (Italy). Morphological
and culture characteristics along with ITS DNA barcodes are provided for all taxa.Alina V. Alexandrova was supported by the Russian Science
Foundation (project N 14-50-00029). Ekaterina F. Malysheva, Olga V.
Morozova,
Alexander E. Kovalenko and Eugene S. Popov acknowledge
financial support from the Russian Foundation for Basic Research (project
13-04-00838a and 15-04-04645a). Margarita Dueñas, María P. Martín and
M. Teresa Telleria acknowledge financial support from the Plan Nacional I+D+I
projects No. CGL2009-07231 and CGL2012-3559. Cony Decock gratefully acknowledges the financial support received from
the FNRS / FRFC (convention FRFC 2.4544.10), the CNRS-French Guiana
and the Nouragues staff, which enabled fieldwork in French Guiana, and the
Belgian State – Belgian Federal Science Policy through the BCCMTM research
programme.http://www.ingentaconnect.com/content/nhn/pimjam201
Giardia intestinalis and nutritional status in children participating in the complementary nutrition program, Antioquia, Colombia, May to October 2006
Mapping density, diversity and species-richness of the Amazon tree flora
Using 2.046 botanically-inventoried tree plots across the largest tropical forest on Earth, we mapped tree species-diversity and tree species-richness at 0.1-degree resolution, and investigated drivers for diversity and richness. Using only location, stratified by forest type, as predictor, our spatial model, to the best of our knowledge, provides the most accurate map of tree diversity in Amazonia to date, explaining approximately 70% of the tree diversity and species-richness. Large soil-forest combinations determine a significant percentage of the variation in tree species-richness and tree alpha-diversity in Amazonian forest-plots. We suggest that the size and fragmentation of these systems drive their large-scale diversity patterns and hence local diversity. A model not using location but cumulative water deficit, tree density, and temperature seasonality explains 47% of the tree species-richness in the terra-firme forest in Amazonia. Over large areas across Amazonia, residuals of this relationship are small and poorly spatially structured, suggesting that much of the residual variation may be local. The Guyana Shield area has consistently negative residuals, showing that this area has lower tree species-richness than expected by our models. We provide extensive plot meta-data, including tree density, tree alpha-diversity and tree species-richness results and gridded maps at 0.1-degree resolution
Time-varying signal analysis to detect high-altitude periodic breathing in climbers ascending to extreme altitude
This work investigates the performance of cardiorespiratory analysis detecting periodic breathing (PB) in chest wall recordings in mountaineers climbing to extreme altitude. The breathing patterns of 34 mountaineers were monitored unobtrusively by inductance plethysmography, ECG and pulse oximetry using a portable recorder during
climbs at altitudes between 4497 and 7546 m on Mt. Muztagh Ata. The minute ventilation (VE) and heart rate (HR) signals were studied, to identify visually scored PB, applying time-varying spectral, coherence and entropy
analysis. In 411 climbing periods, 30–120 min in duration, high values of mean power (MPVE) and slope (MSlopeVE)
of the modulation frequency band of VE, accurately identified PB, with an area under the ROC curve of 88 and 89 %,
respectively. Prolonged stay at altitude was associated with an increase in PB. During PB episodes, higher peak power
of ventilatory (MPVE) and cardiac (MPLF
HR) oscillations and cardiorespiratory coherence (MPLFCoher), but reduced ventilation entropy (SampEnVE), was observed. Therefore, the characterization of cardiorespiratory dynamics by the analysis of VE and HR signals accurately identifies PB and
effects of altitude acclimatization, providing promising tools for investigating physiologic effects of environmental
exposures and diseases.Peer Reviewe
Evolución en niños con falla intestinal en un hospital de referencia en Medellín, Colombia
Antecedentes: Los pacientes con falla intestinal son incapaces de mantener una adecuada nutrición e hidratación debido a una reducción en el área intestinal funcional. La implementación de diferentes estrategias tiene el potencial de beneficiar a estos pacientes en términos de favorecer la autonomía intestinal, aumentar la calidad de vida y elevar la supervivencia.
Objetivos: Describir las características clínicas de niños con falla intestinal, así como la evolución en términos de autonomía intestinal y supervivencia.
Materiales y métodos: Estudio retrospectivo en el que se evaluó a 33 pacientes pediátricos con falla intestinal, hospitalizados entre diciembre del 2005 y diciembre del 2013 en una institución de alta especialidad. Se describieron las características de los pacientes al ingreso hospitalario, se estimó la probabilidad de lograr la autonomía intestinal y se calculó la tasa de supervivencia.
Resultados: La mediana de edad al momento de ingresar al hospital fue 2 meses (rango intercuartílico [RIC]: 1-4 meses) y el 54.5% de los pacientes fueron de sexo masculino. El 69.7% de los casos lograron la autonomía intestinal con una mediana de tiempo de 148 días (RIC: 63-431 días), la cual disminuyó a 63 días cuando los pacientes tenían presencia de válvula ileocecal. La supervivencia fue del 91% durante una mediana se seguimiento de 281días (RIC: 161-772 días).
Conclusiones: El manejo médico de los pacientes con falla intestinal es complejo. El soporte nutricional y la monitorización continua son de vital importancia y la morbimortalidad a largo plazo depende del reconocimiento y manejo precoz de las complicaciones asociadas
The impact of COVID-19 pandemic on the diagnosis and management of inborn errors of metabolism: A global perspective
Quantitative estimates for the global impact of COVID-19 on the diagnosis and management of patients with inborn errors of metabolism (IEM) are lacking. We collected relevant data from 16 specialized medical centers treating IEM patients in Europe, Asia and Africa. The median decline of reported IEM related services in March 1st-May 31st 2020 compared to the same period in 2019 were as high as 60-80% with a profound impact on patient management and care for this vulnerable patient group. More representative data along with outcome data and guidelines for managing IEM disorders under such extraordinary circumstances are needed