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https://www.readbyqxmd.com/read/29245157/dynamic-cellular-complexity-of-anoxygenic-phototrophic-sulfur-bacteria-in-the-chemocline-of-meromictic-lake-cadagno
#1
Francesco Danza, Nicola Storelli, Samuele Roman, Samuel Lüdin, Mauro Tonolla
The meromictic Lake Cadagno is characterized by a compact chemocline with high concentrations of anoxygenic phototrophic purple sulfur bacteria (PSB) and green sulfur bacteria (GSB). The co-occurrence of phylogenetically distant bacterial groups such as PSB and GSB in the same ecological niche, makes the chemocline of Lake Cadagno an ideal system for studying the conditions and consequences of coexistence of photosynthetic bacteria populations. In this study, we applied flow cytometry (FCM) as a fast tool to identify metabolic changes due to the production and consumption of inclusion bodies such as sulfur globules (SGBs), and follow population dynamics of closely related anoxygenic photosynthetic sulfur bacteria in their natural environment...
2017: PloS One
https://www.readbyqxmd.com/read/29245129/a-novel-approach-of-modeling-continuous-dark-hydrogen-fermentation
#2
Maria Alexandropoulou, Georgia Antonopoulou, Gerasimos Lyberatos
In this study a novel modeling approach for describing fermentative hydrogen production in a continuous stirred tank reactor (CSTR) was developed, using the Aquasim modeling platform. This model accounts for the key metabolic reactions taking place in a fermentative hydrogen producing reactor, using fixed stoichiometry but different reaction rates. Biomass yields are determined based on bioenergetics. The model is capable of describing very well the variation in the distribution of metabolic products for a wide range of hydraulic retention times (HRT)...
December 6, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29245103/long-acting-intramuscular-naltrexone-for-opioid-use-disorder-utilization-and-association-with-multi-morbidity-nationally-in-the-veterans-health-administration
#3
Megan M Kelly, Erin Reilly, Timothy Quiñones, Nitigna Desai, Robert Rosenheck
BACKGROUND: Long acting intramuscular (IM) naltrexone is an effective treatment for opioid use disorder (OUD), but rates and correlates of its use have not been studied. METHODS: National administrative from the Veterans Health Administration (VHA) from Fiscal Year 2012 identified only 16 VHA facilities that prescribed IM naltrexone to 5 or more veterans diagnosed with OUD. Data from these facilities were used to identify sociodemographic, diagnostic, and service use characteristics, including use of psychotropic medication, that were characteristic of veterans who filled prescriptions for IM naltrexone...
December 2, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29245041/stability-of-postmortem-methemoglobin-artifactual-changes-caused-by-storage-conditions
#4
Vincent Varlet, Elenore Ryser, Marc Augsburger, Cristian Palmiere
Hemoglobin is the protein in red blood cells that carries and distributes oxygen to the body. Methemoglobinemia is a blood disorder in which an abnormal amount of methemoglobin (MetHb), a form of hemoglobin (Hb), is produced from either inadequate MetHb reductase activity or too much MetHb production or by exposure to oxidizing agents. This could lead to anoxia and death if it is not treated. However, this parameter has not been investigated as a valid post-mortem indicator because random MetHb levels have been observed in various studies: MetHb increases can be observed due to autoxidation during storage, and MetHb decreases can be observed due to MetHb reductase or microbial activity in post-mortem samples...
December 8, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29245010/our-gut-microbiome-the-evolving-inner-self
#5
REVIEW
Parag Kundu, Eran Blacher, Eran Elinav, Sven Pettersson
The "holobiont" concept, defined as the collective contribution of the eukaryotic and prokaryotic counterparts to the multicellular organism, introduces a complex definition of individuality enabling a new comprehensive view of human evolution and personalized characteristics. Here, we provide snapshots of the evolving microbial-host associations and relations during distinct milestones across the lifespan of a human being. We discuss the current knowledge of biological symbiosis between the microbiome and its host and portray the challenges in understanding these interactions and their potential effects on human physiology, including microbiome-nervous system inter-relationship and its relevance to human variation and individuality...
December 14, 2017: Cell
https://www.readbyqxmd.com/read/29244997/beliefs-and-determinants-of-use-of-traditional-complementary-alternative-medicine-in-pediatric-patients-who-undergo-treatment-for-cancer-in-south-america
#6
Valeria Rocha, Elena J Ladas, Meiko Lin, Walter Cacciavillano, Elizabeth Ginn, Kara M Kelly, Guillermo Chantada, Luis Castillo
Purpose The use of traditional complementary/alternative medicine (TCAM) among children with cancer has been well documented. South America has a rich history of traditional healers and medicinal resources; however, little is known about the use of TCAM among children with cancer. We sought to investigate patterns, beliefs, and determinants of TCAM use among South American children with cancer. Methods A cross-sectional survey was administered to 199 children treated for cancer at institutions located in Buenos Aires, Argentina, and Montevideo, Uruguay...
December 2017: Journal of Global Oncology
https://www.readbyqxmd.com/read/29244992/oral-morphine-use-in-south-india-a-population-based-study
#7
M R Rajagopal, Safiya Karim, Christopher M Booth
Purpose Access to opioids for pain control is recognized as an urgent issue in low- and middle-income countries. Here we report temporal and regional trends in morphine use in Kerala, India. Methods Oral morphine use data for the State of Kerala (2012 to 2015) was used to describe temporal trends, regional variation, and provider characteristics. Total morphine use was calculated for each district of Kerala to derive an annual per capita use rate (milligrams per capita). Each provider was classified as government, private, nongovernment organization (NGO), or NGO partnership...
December 2017: Journal of Global Oncology
https://www.readbyqxmd.com/read/29244973/cooperativity-between-antibiotics-and-antiseptics-testing-the-bactericidal-effect
#8
S Jenull, H Laggner, I Hassl, B Velimirov, M Huettinger, N Zemann
OBJECTIVE: Treatment with antibiotics together with local application of antiseptics is common in wound care. We investigated the effectiveness of an antiseptic in two variations: octenidine (Oct) and octenidine+ (Oct+ with isotonic glucose addition). METHOD: Using the agar diffusion test with cultures of pathogenic Staphylococcus aureus and the non-pathogenic Bordetella petrii, we compared the effectiveness of octenidine to the classical antiseptics beta-isodona (povidone-iodine; PI), chlorhexidine (Chl) and taurolin (Tau) alone, and in combination with various common antibiotics to uncover cooperativity between antiseptics and antibiotics...
December 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/29244972/evaluating-an-ipad-app-in-measuring-wound-dimension-a-pilot-study
#9
P C B Khong, M S W Yeo, C C Goh
OBJECTIVE: This pilot study tested the reliability, validity and sensitivity of an innovative prototype iPad app, WoundAide, developed to measure wound dimension (length, width and surface area) using image analysis. METHOD: A prospective evaluation was conducted comparing WoundAide (WA) with two gold standard instruments, Wound Zoom (WZ) and Visitrak (VT). The study was conducted in a tertiary hospital in Singapore. Patients were recruited after obtaining local ethics approval...
December 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/29244964/outpatient-negative-pressure-dressing-therapy-for-pretibial-lacerations-in-a-patient-with-high-anaesthetic-risk-a-case-study
#10
L Sutton, D Edwards, M McColl
Pretibial lacerations are a common cause of presentation to accident and emergency departments. The management of these wounds is contentious with a variation in practise between individual institutions. We present the case of a 49-year-old female with a background of pulmonary atresia and associated pulmonary hypertension, who underwent successful outpatient negative pressure wound therapy (NPWT) for three pretibial lacerations. We would propose that this therapy is an effective option for the management of these wounds in independently mobile patients who are at high-risk when under anaesthetic...
December 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/29244947/a-new-strategy-for-in-vitro-determination-of-carbonic-anhydrase-activity-from-analysis-of-oxygen-18-isotopes-of-co2
#11
Chiranjit Ghosh, Santanu Mandal, Mithun Pal, Manik Pradhan
The oxygen-18 isotopic (18O) composition in CO2 provides important insight into the variation of rate in isotopic fractionation reaction regulated by carbonic anydrase (CA) metalloenzyme. This work aims to employ 18O-isotope ratio-based analytical method for quantitative estimation of CA activity in erythrocytes for clinical testing purposes. Here, a new method has been developed that contains the measurements of 18O/16Oisotope ratios during oxygen-18 isotopic exchange between 12C16O16O and H218O of in-vitro biochemical reaction controlled by erythrocytes CA and estimation of enzymatic activity of CA from the isotopic composition of CO2...
December 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29244899/spatial-response-of-synthetic-microdiamond-and-diode-detectors-measured-with-kilovoltage-synchrotron-radiation
#12
Duncan J Butler, Toby Beveridge, Joerg Lehmann, Christopher P Oliver, Andrew W Stevenson, Jayde Livingstone
PURPOSE: To map the spatial response of four solid-state radiation detectors of types commonly used for radiotherapy dosimetry. METHODS: PTW model 60016 Diode P, 60017 Diode E, 60018 Diode SRS and 60019 microDiamond detectors were radiographed using a high resolution conventional X-ray system. Their spatial response was then investigated using a 0.1 mm diameter beam of 95 keV average energy photons generated by a synchrotron. The detectors were scanned through the beam while their signal was recorded as a function of position, to map the response...
December 15, 2017: Medical Physics
https://www.readbyqxmd.com/read/29244861/reliability-of-the-parameters-of-the-power-duration-relationship-using-maximal-effort-time-trials-under-laboratory-conditions
#13
Christoph Triska, Bettina Karsten, Bernd Heidegger, Bernhard Koller-Zeisler, Bernhard Prinz, Alfred Nimmerichter, Harald Tschan
The purpose of this study was to assess the reliability of critical power (CP) and the total amount of work accomplished above CP (W´) across repeated tests using ecologically valid maximal effort time-trials (TT) under laboratory conditions. After an initial incremental exercise test, ten well-trained male triathletes (age: 28.5 ± 4.7 years; body mass: 73.3 ± 7.9 kg; height: 1.80 ± 0.07 m; maximal aerobic power [MAP]: 329 ± 41 W) performed three testing sessions (Familiarization, Test I and Test II) each comprising three TT (12, 7, and 3 min with a passive recovery of 60 min between trials)...
2017: PloS One
https://www.readbyqxmd.com/read/29244854/morphological-switch-to-a-resistant-subpopulation-in-response-to-viral-infection-in-the-bloom-forming-coccolithophore-emiliania-huxleyi
#14
Miguel José Frada, Shilo Rosenwasser, Shifra Ben-Dor, Adva Shemi, Helena Sabanay, Assaf Vardi
Recognizing the life cycle of an organism is key to understanding its biology and ecological impact. Emiliania huxleyi is a cosmopolitan marine microalga, which displays a poorly understood biphasic sexual life cycle comprised of a calcified diploid phase and a morphologically distinct biflagellate haploid phase. Diploid cells (2N) form large-scale blooms in the oceans, which are routinely terminated by specific lytic viruses (EhV). In contrast, haploid cells (1N) are resistant to EhV. Further evidence indicates that 1N cells may be produced during viral infection...
December 15, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29244847/cognitive-failures-in-late-adulthood-the-role-of-age-social-context-and-depressive-symptoms
#15
Paul Kenneth Hitchcott, Maria Chiara Fastame, Dalila Langiu, Maria Pietronilla Penna
The incidence of self-reported cognitive failures among older adults may be an index of successful cognitive aging. However, self-reported cognitive failures are biased by variation in depressive symptomatology. This study examined age-related and socio-cultural context effects on cognitive failures while controlling for depressive symptoms. Both overall and specific factors of cognitive failures were determined. A further goal was to investigate the relationship between working memory and cognitive efficiency measures and cognitive failures...
2017: PloS One
https://www.readbyqxmd.com/read/29244845/diet-and-stable-isotope-analyses-reveal-the-feeding-ecology-of-the-orangeback-squid-sthenoteuthis-pteropus-steenstrup-1855-mollusca-ommastrephidae-in-the-eastern-tropical-atlantic
#16
Véronique Merten, Bernd Christiansen, Jamileh Javidpour, Uwe Piatkowski, Oscar Puebla, Rebeca Gasca, Henk-Jan T Hoving
In the eastern tropical Atlantic, the orangeback flying squid Sthenoteuthis pteropus (Steenstrup 1855) (Cephalopoda, Ommastrephidae) is a dominant species of the epipelagic nekton community. This carnivore squid has a short lifespan and is one of the fastest-growing squids. In this study, we characterise the role of S. pteropus in the pelagic food web of the eastern tropical Atlantic by investigating its diet and the dynamics of its feeding habits throughout its ontogeny and migration. During three expeditions in the eastern tropical Atlantic in 2015, 129 specimens were caught by hand jigging...
2017: PloS One
https://www.readbyqxmd.com/read/29244842/intensive-care-treatments-associated-with-favorable-discharge-outcomes-in-argentine-children-with-severe-traumatic-brain-injury-for-the-south-american-guideline-adherence-group
#17
Monica S Vavilala, Silvia B Lujan, Qian Qiu, Michael J Bell, Nicolás M Ballarini, Nahuel Guadagnoli, María Alejandra Depetris, Gabriela A Faguaga, Gloria M Baggio, Leonardo O Busso, Mirta E García, Osvaldo R González Carrillo, Paula L Medici, Silvia S Sáenz, Elida E Vanella, Carly K Farr, Gustavo J Petroni
OBJECTIVE: Little is known about the critical care management of children with traumatic brain injury (TBI) in low middle income countries. We aimed to identify indicators of intensive care unit (ICU) treatments associated with favorable outcomes in Argentine children with severe TBI. METHODS: We conducted a secondary analysis of data from patients previously enrolled in a prospective seven center study of children with severe TBI who were admitted to an ICU in one of the seven study centers...
2017: PloS One
https://www.readbyqxmd.com/read/29244836/energy-compensation-after-sprint-and-high-intensity-interval-training
#18
Matthew M Schubert, Elyse Palumbo, Rebekah F Seay, Katie K Spain, Holly E Clarke
BACKGROUND: Many individuals lose less weight than expected in response to exercise interventions when considering the increased energy expenditure of exercise (ExEE). This is due to energy compensation in response to ExEE, which may include increases in energy intake (EI) and decreases in non-exercise physical activity (NEPA). We examined the degree of energy compensation in healthy young men and women in response to interval training. METHODS: Data were examined from a prior study in which 24 participants (mean age, BMI, & VO2max = 28 yrs, 27...
2017: PloS One
https://www.readbyqxmd.com/read/29244799/prenatal-and-early-postnatal-measures-of-brain-development-and-childhood-sleep-patterns
#19
Desana Kocevska, Maria E Verhoeff, Selma Meinderts, Vincent W Jaddoe, Frank C Verhulst, Sabine J Roza, Maartje P C M Luijk, Henning Tiemeier
BACKGROUND: Brain development underlies maturation of sleep patterns throughout childhood. Intrauterine head growth -marker of early neurodevelopment- has not been associated with childhood sleep characteristics. We explored associations between ultrasonographic measures of prenatal and early postnatal neurodevelopment and childhood sleep. METHODS: Six-thousand-five-hundred-twenty-eight children from a population-based birth cohort (Generation R) were included. Head circumference (HC) and lateral ventricles size were assessed with mid- and late-pregnancy fetal ultrasounds, and with cranial ultrasound 3-20 weeks postnatally...
December 15, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29244770/a-highly-sensitive-two-dimensional-inclinometer-based-on-two-etched-chirped-fiber-grating-arrays
#20
Hung-Ying Chang, Yu-Chung Chang, Wen-Fung Liu
We present a novel two-dimensional fiber-optic inclinometer with high sensitivity by crisscrossing two etched chirped fiber Bragg gratings (CFBG) arrays. Each array is composed of two symmetrically-arranged CFBGs. By etching away most of the claddings of the CFBGs to expose the evanescent wave, the reflection spectra are highly sensitive to the surrounding index change. When we immerse only part of the CFBG in liquid, the effective index difference induces a superposition peak in the refection spectrum. By interrogating the peak wavelengths of the CFBGs, we can deduce the tilt angle and direction simultaneously...
December 15, 2017: Sensors
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