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Search Results: 1 - 10 of 222650 matches for " Rachel; Bay C "
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CONTENIDO DE PLOMO SANGUíNEO Y COMPOSICIóN CORPORAL EN MUJERES JóVENES EXPUESTAS A HUMO DE MADERA EN LA CIUDAD DE TEMUCO BLOOD LEAD LEVELS AND BODY COMPOSITION IN YOUNG WOMEN EXPOSED TO WOOD SMOKE IN THE CITY OF TEMUCO
Rachel Pacheco A,Camila Bay C,Yareni Gutiérrez G,Gabriela Salazar R
Revista Chilena de Nutricíon , 2011,
Abstract: Uno de los problemas más frecuentes en las ciudades de países en desarrollo es la coexistencia de polución ambiental, malnutrición y sobrepeso. La ciudad de Temuco posee una elevada contaminación ambiental y se desconoce el rango de las concentraciones de plomo circulante en la población. El objetivo de este trabajo fue estudiar la concentración de plomo sanguíneo en mujeres temuquenses expuestas a humo de le a doméstico en forma continua (n=45), y su posible asociación con la composición corporal. La concentración sanguínea de plomo fue analizada por espectrofotometría de absorción atómica con horno de grafito (AAS-GF), y la composición corporal se determinó por el método de dilución isotópica (deuterio). Todas las mujeres participantes registraron elevados porcentajes de masa grasa (MG) y un 66.7% de ellas registró concentraciones de plomo sanguíneo sobre los niveles aceptados internacionalmente (5 μg/dl; EPA; USA), aunque bajo la normativa chilena (40 μg/dl), los que no se correlacionaron con el % de MG. El elevado porcentaje de sobrepeso y obesidad junto a los niveles de plomo observados en este estudio constituyen factores de riesgo que afectarán en un mediano plazo la salud y calidad de vida de las participantes. One of the main concerns in the cities ofdeveloping countries is the coexistence of environmental pollution, malnutrition and overweight. The city of Temuco is highly polluted and the range of circulating lead of their inhabitants is unknown. The objective of this work was to study the potential association between blood lead concentration and body composition in young women (n=45) living in the city of Temuco, which were exposed permanently to wood smoke. Blood lead concentration was analyzed by atomic absorption spectrometry with graphite furnace (AAS-GF) and the body composition was determined by isotopic dilution (deuterium). All participants presented high percentage offat mass (FM) and 66.7% of them had blood lead levels over the accepted international limits (5μgldl; EPA; USA), although lower than the Chilean normative (40μgldl), which were not correlated with the % of FM. The high percentage of overweight and obesity together with the lead blood levels found in this study constitute risk factors that may affect health and life quality of the participants in the medium term.
CONTENIDO DE PLOMO SANGUíNEO Y COMPOSICIóN CORPORAL EN MUJERES JóVENES EXPUESTAS A HUMO DE MADERA EN LA CIUDAD DE TEMUCO
Pacheco A,Rachel; Bay C,Camila; Gutiérrez G,Yareni; Salazar R,Gabriela; Mu?oz A,Luis; Llanos S,Miguel; Ronco M,Ana María;
Revista chilena de nutrición , 2011, DOI: 10.4067/S0717-75182011000400003
Abstract: one of the main concerns in the cities ofdeveloping countries is the coexistence of environmental pollution, malnutrition and overweight. the city of temuco is highly polluted and the range of circulating lead of their inhabitants is unknown. the objective of this work was to study the potential association between blood lead concentration and body composition in young women (n=45) living in the city of temuco, which were exposed permanently to wood smoke. blood lead concentration was analyzed by atomic absorption spectrometry with graphite furnace (aas-gf) and the body composition was determined by isotopic dilution (deuterium). all participants presented high percentage offat mass (fm) and 66.7% of them had blood lead levels over the accepted international limits (5μgldl; epa; usa), although lower than the chilean normative (40μgldl), which were not correlated with the % of fm. the high percentage of overweight and obesity together with the lead blood levels found in this study constitute risk factors that may affect health and life quality of the participants in the medium term.
Search for High Energy Neutrino Emission from Gamma-Ray Bursts with the A ntarctic Muon and Neutrino Detector Array (AMANDA)
Ryan C. Bay
Physics , 2000,
Abstract: The photo-meson production of pions by shock-accelerated protons could generate a burst of ~10^14 eV neutrinos from gamma-ray bursts (GRBs) observable in the Antarctic Muon and Neutrino Detector Array (AMANDA) or its larger successors. Measurement of this flux can test the hypothesis that GRBs are the sources of the highest-energy cosmic rays, and GRB neutrinos could permit high-precision experiments in neutrino limiting speed, neutrino oscillations, and the weak equivalence principle. Neutrino emission can be expected primarily during the prompt gamma-ray flash and satellite coincidence provides a well-defined window in position and time that can be searched for an excess of upgoing muon events in AMANDA from bursts in the Northern Hemisphere. Using an event quality analysis to further reduce background in a sample of 78 GRBs from the 1997 AMANDA-B10 data set, I find a fluence limit of (E_nu)^2 (dN_nu)/(dE_nu)<3.8*10^-4 min(1,E_nu/E_break) [TeV cm^-2] per average burst, which is orders of magnitude more stringent than in similar previous searches.
Diversity and evolution of the small multidrug resistance protein family
Denice C Bay, Raymond J Turner
BMC Evolutionary Biology , 2009, DOI: 10.1186/1471-2148-9-140
Abstract: A thorough annotation of unidentified/putative SMR sequences was performed placing sequences into each of the three SMR protein subclass designations, namely small multidrug proteins (SMP), suppressor of groEL mutations (SUG), and paired small multidrug resistance (PSMR) using protein alignments and phylogenetic analysis. Examination of SMR subclass distribution within Bacteria and Archaea taxa identified specific Bacterial classes that uniquely encode for particular SMR subclass members. The extent of selective pressure acting upon each SMR subclass was determined by calculating the rate of synonymous to non-synonymous nucleotide substitutions using Syn-SCAN analysis. SUG and SMP subclasses are maintained under moderate selection pressure in comparison to integron and plasmid encoded SMR homologues. Conversely, PSMR sequences are maintained under lower levels of selection pressure, where one of the two PSMR pairs diverges in sequence more rapidly than the other. SMR genomic loci surveys identified potential SMR efflux substrates based on its gene association to putative operons that encode for genes regulating amino acid biogenesis and QAC-like metabolites. SMR subclass protein transmembrane domain alignments to Bacterial/Archaeal transporters (BAT), DMT, and MFS sequences supports SMR participation in multidrug transport evolution by identifying common TM domains.Based on this study, PSMR sequences originated recently within both SUG and SMP clades through gene duplication events and it appears that SMR members may be evolving towards specific metabolite transport.Anthropogenic drug overuse combined with the rapid horizontal distribution of multidrug efflux genes encoded on mobile genetic elements has facilitated drug resistance in distant or unrelated microorganisms [1-3]. One such gene encode small multidrug resistance (SMR) proteins which are frequently identified within the 3' conserved region of mobile genetic elements referred to as integrons [4] and on vari
Marine bacteria in deep Arctic and Antarctic ice cores: a proxy for evolution in oceans over 300 million generations
P. B. Price ,R. C. Bay
Biogeosciences (BG) & Discussions (BGD) , 2012,
Abstract: Using fluorescence spectrometry to map autofluorescence of chlorophyll (Chl) and tryptophan (Trp) versus depth in polar ice cores in the US National Ice Core Laboratory, we found that the Chl and Trp concentrations often showed an annual modulation of up to 25%, with peaks at depths corresponding to local summers. Using epifluorescence microscopy (EFM) and flow cytometry (FCM) triggered on red fluorescence at 670 nm to study microbes from unstained melts of the polar ice, we inferred that picocyanobacteria may have been responsible for the red fluorescence in the cores. Micron-size bacteria in all ice melts from Arctic and Antarctic sites showed FCM patterns of scattering and of red vs. orange fluorescence (interpreted as due to Chl vs. phycoerythrin (PE)) that bore similarities to patterns of cultures of unstained picocyanobacteria Prochlorococcus and Synechococcus. Concentrations in ice from all sites were low, but measurable at ~ 1 to ~ 103 cells cm 3. Calibrations showed that FCM patterns of mineral grains and volcanic ash could be distinguished from microbes with high efficiency by triggering on scattering instead of by red fluorescence. Average Chl and PE autofluorescence intensities showed no decrease per cell with time during up to 150 000 yr of storage in glacial ice. Taking into account the annual modulation of ~ 25% and seasonal changes of ocean temperatures and winds, we suggest that picocyanobacteria are wind-transported year-round from warmer ocean waters onto polar ice. Ice cores offer the opportunity to study evolution of marine microbes over ~ 300 million generations by analysing their genomes vs. depth in glacial ice over the last 700 000 yr as frozen proxies for changes in their genomes in oceans.
Marine bacteria in deep Arctic and Antarctic ice cores: a proxy for evolution in oceans over 300 million generations
P. B. Price,R. C. Bay
Biogeosciences Discussions , 2012, DOI: 10.5194/bgd-9-6535-2012
Abstract: Using fluorescence spectrometry to map autofluorescence of chlorophyll (Chl) and tryptophan (Trp) versus depth in polar ice cores in the US National Ice Core Laboratory, we found that the Chl and Trp concentrations often showed an annual modulation of up to 25%, with peaks at depths corresponding to local summers. Using epifluorescence microscopy (EFM) and flow cytometry (FCM) triggered on 670 nm fluorescence (red) to study microbes from unstained melts of the polar ice, we inferred that picocyanobacteria may have been responsible for the red fluorescence in the cores. Micron-size bacteria in all ice melts from 2 Arctic and 6 Antarctic sites showed FCM patterns of scattering and of red vs. orange fluorescence (interpreted as due to Chl vs. phycoerythrin (PE)) that bore similarities to patterns of cultures of unstained picocyanobacteria Prochlorococcus and Synechococcus. Concentrations in ice from all sites were low but measurable at ~1 to ~103 cells cm 3. Calibrations showed that FCM patterns of mineral grains and volcanic ash could be distinguished from microbes with high efficiency by triggering on scattering instead of by red fluorescence. Average Chl and PE autofluorescence intensities showed no decrease per cell with time during up to 150 000 yr of storage in glacial ice. Taking into account the annual modulation of ~25% and seasonal changes of ocean temperatures and winds, we suggest that picocyanobacteria are wind-transported year-round from warmer ocean waters onto polar ice. Ice cores offer the opportunity to study evolution of marine microbes over ~300 million generations by analyzing their genomes vs. depth in glacial ice over the last 700 000 yr as frozen proxies for changes in their genomes in oceans.
Precise measurement of theta_13 at Daya Bay
M. -C. Chu,for the Daya Bay Collaboration
Physics , 2008,
Abstract: The Daya Bay Reactor Neutrino Experiment is designed to determine the yet unknown neutrino mixing angle theta_13 by measuring the disappearance of electron antineutrinos from several nuclear reactor cores, using multiple underground detectors at different baselines to minimize systematic errors and to suppress the cosmogenic background. The civil construction has begun since October 2007, enabling first commissioning data in 2009, and full data taking will begin in late 2010. The planned sensitivity in sin^2 (2theta_13) of better than 0.01 at 90% CL will be achieved in three years of data-taking. I will present an overview and current status of the experiment.
Psycho-Physiological Combined Therapy on the Sexual Desire  [PDF]
Roohallah Bay, Shaiful Bahari Ismail, Fatemeh Bay
Open Journal of Urology (OJU) , 2013, DOI: 10.4236/oju.2013.36049
Abstract:

Objective: Hypoactive Sexual Desire is characterized as a lack or absence of sexual fantasies and desire for sexual activity. The current study examines the effects of psycho-physiological therapy (stretch therapy combined with breathing exercise) on the sexual desire among heterosexual men. Methods: We used “convenience sampling” for this research; 80 people were recruited. For collection of data, we used an identical quasi-experimental design called “nonequivalent control group.” Therapy sessions each lasting (20) 90 to 120 min were carried out on 3 alternate days of week. The volunteers have been selected from heterosexual men with stable relationship, those who married minimum of 6 months, within 20 to 55 years old, who attended to HUSM Family Clinic. Pre-tests, post-tests, and follow-up tests were conducted in a HUSM clinic (Malaysia). For assessment we used Hurlbert Index of Sexual Desire (HISD). Results: The psycho-physiological group had better post-test scores compared to the control group. Also follow-up test scores were marginally better compared to the control group, but this difference did not reach statistical significance. Also age and education level of participants didn’t have any significant effect on this intervention.

Is Age-related Decline in Vocal Emotion Identification an Artefact of Labelling Cognitions?
Rachel L. C. Mitchell,Rachel A. Kingston
International Journal of Psychological Studies , 2011, DOI: 10.5539/ijps.v3n2p156
Abstract: Evidence has emerged that older adults find it more difficult to interpret prosodic emotions than younger adults. However, typical tasks involve labelling-related cognitions over and above emotion perception per se. Accordingly, we aimed to determine if age-related difficulty in prosodic emotion labelling extended to discrimination, which is more closely related to emotion perception per se. For this purpose, 45 younger adults (mean age 20 years, 2 males/43 females) and 45 older adults (mean age 71 years, 16 males/29 females) were recruited. In one task, participants heard pairs of sentences and were asked to indicate whether they were spoken with the same emotional intonational or not. In a second task, they heard sentences with intonation conveying a question or statement, and indicated whether the non-emotional intonation patterns matched or not. Older adults’ performance consistently fell below that of younger adults. Older adults may have a generic prosodic decoding deficit, regardless of the end function of the prosody.
Evolución histórica de la ense?anza sobre alimentación y nutrición humana en Santiago de Cuba
Cáceres Diéguez,Aglae; Bayés Cáceres,Edgar;
MEDISAN , 2012,
Abstract: the continuous improvement of teaching on human feeding and nutrition in the medical sciences constitutes a necessity, reason why an analysis of its historical development in santiago de cuba province was carried out from its beginnings in 1959 to the present time, regarding teaching, care, health services and investigation, in order to deepen in the knowledge on the topic and that these, in turn, be a contribution to the training process in pregraduate and posgraduate, because in none of the cases they do not fully satisfy the real needs about such an important instruction, which can contribute to improve the feeding culture in the population when interactive procedures are used linked with the social investigations.
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