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https://www.readbyqxmd.com/read/28436504/designing-co2-resistant-oxygen-selective-mixed-ionic-electronic-conducting-membranes-guidelines-recent-advances-and-forward-directions
#1
REVIEW
Chi Zhang, Jaka Sunarso, Shaomin Liu
CO2 resistance is an enabling property for the wide-scale implementation of oxygen-selective mixed ionic-electronic conducting (MIEC) membranes in clean energy technologies, i.e., oxyfuel combustion, clean coal energy delivery, and catalytic membrane reactors for greener chemical synthesis. The significant rise in the number of studies over the past decade and the major progress in CO2-resistant MIEC materials warrant systematic guidelines on this topic. To this end, this review features the pertaining aspects in addition to the recent status and advances of the two most promising membrane materials, perovskite and fluorite-based dual-phase materials...
April 24, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28433721/optimizing-the-restored-chemotactic-behavior-of-anticancer-agent-salmonella-enterica-serovar-typhimurium-vnp20009
#2
Katherine M Broadway, Seungbeum Suh, Bahareh Behkam, Birgit E Scharf
Bacteria, including strains of Salmonella, have been researched and applied as therapeutic cancer agents for centuries. Salmonella are particularly of interest due to their facultative anaerobic nature, facilitating colonization of differentially oxygenated tumor regions. Additionally, Salmonella can be manipulated with relative ease, resulting in the ability to attenuate the pathogen or engineer vectors for drug delivery. It was recently discovered that the anti-cancer Salmonella enterica serovar Typhimurium strain VNP20009 is lacking in chemotactic ability, due to a non-synonymous single nucleotide polymorphism in cheY...
April 19, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28431920/the-microbiome-in-anti-cancer-therapy
#3
REVIEW
Stavros Bashiardes, Timur Tuganbaev, Sara Federici, Eran Elinav
The commensal microbiome constitutes an important modulator of host physiology and risk of disease, including cancer development and progression. Lately, the microbiome has been suggested to modulate the efficacy of anti-cancer treatment. Examples include chemotherapy and total body irradiation-induced barrier function disruption, leading to microbial efflux that drives activation of anti-tumorigenic T cells; Microbiome-driven release of reactive oxygen species contributing to the efficacy of platinum salts; and microbiome-induced immune priming promoting the anti-tumor effects of alkylating chemotherapy and immune checkpoint inhibitors...
April 18, 2017: Seminars in Immunology
https://www.readbyqxmd.com/read/28430298/an-experimental-numerical-investigation-on-the-effects-of-macroporous-scaffold-geometry-on-cell-culture-parameters
#4
Hadis Eghbali, Michele M Nava, Gabriella Leonardi, Davod Mohebbi-Kalhori, Roberto Sebastiano, Abdolreza Samimi, Manuela T Raimondi
INTRODUCTION: Perfused bioreactors have been demonstrated to be effective in the delivery of nutrients and in the removal of waste products to and from the interior of cell-populated three-dimensional scaffolds. In this paper, a perfused bioreactor hosting a macroporous scaffold provided with a channel is used to investigate transport phenomena and culture parameters on cell growth. METHODS: MG63 human osteosarcoma cells were seeded on macroporous poly​(ε-caprolactone) scaffolds provided with a channel...
April 13, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28429120/the-influence-of-pump-rotation-speed-on-hemodynamics-and-myocardial-oxygen-metabolism-in-left-ventricular-assist-device-support-with-aortic-valve-regurgitation
#5
Kei Iizuka, Tomohiro Nishinaka, Yoshiaki Takewa, Kenji Yamazaki, Eisuke Tatsumi
Aortic valve regurgitation (AR) is a serious complication under left ventricular assist device (LVAD) support. AR causes LVAD-left ventricular (LV) recirculation, which makes it difficult to continue LVAD support. However, the hemodynamics and myocardial oxygen metabolism of LVAD support with AR have not been clarified, especially, how pump rotation speed influences them. An animal model of LVAD with AR was newly developed, and how pump rotation speed influences hemodynamics and myocardial oxygen metabolism was examined in acute animal experiments...
April 20, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28428757/circadian-rhythm-in-kidney-tissue-oxygenation-in-the-rat
#6
Tonja W Emans, Ben J Janssen, Jaap A Joles, C T Paul Krediet
Blood pressure, renal hemodynamics, electrolyte, and water excretion all display diurnal oscillation. Disturbance of these patterns is associated with hypertension and chronic kidney disease. Kidney oxygenation is dependent on oxygen delivery and consumption that in turn are determined by renal hemodynamics and metabolism. We hypothesized that kidney oxygenation also demonstrates 24-h periodicity. Telemetric oxygen-sensitive carbon paste electrodes were implanted in Sprague-Dawley rats (250-300 g), either in renal medulla (n = 9) or cortex (n = 7)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28425701/the-effects-of-glutamate-receptor-activation-on-local-oxygen-changes
#7
Lindsay Walton, Nick G Boustead, Susan Carroll, R Mark Wightman
Glutamate is ubiquitous throughout the brain and serves as the primary excitatory neurotransmitter. Neurons require energy to fire, and energetic substrates (i.e., O2, glucose) are renewed via cerebral blood flow (CBF) to maintain metabolic homeostasis. Magnetic resonance brain functionality studies rely on the assumption that CBF and neuronal activity are coupled consistently throughout the brain; however, the origin of neuronal activity does not always coincide with signals indicative of energy consumption (e...
April 20, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28422506/extra-large-pore-mesoporous-silica-nanoparticles-for-directing-in-vivo-m2-macrophage-polarization-by-delivering-il-4
#8
Dohyeong Kwon, Bong Geun Cha, Yuri Cho, Jiyoun Min, Eun-Byeol Park, Suk-Jo Kang, Jaeyun Kim
Over the past decade, mesoporous silica nanoparticles (MSNs) smaller than 200 nm with a high colloidal stability have been extensively studied for systemic drug delivery. Although small molecule delivery via MSNs has been successful, the encapsulation of large therapeutic biomolecules, such as proteins or DNA, is limited due to small pore size of the conventional MSNs obtained by soft-templating. Here, we report the synthesis of mesoporous silica nanoparticles with extra-large pores (XL-MSNs) and their application to in vivo cytokine delivery for macrophage polarization...
April 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28420542/improving-prehospital-trauma-care-in-rwanda-through-continuous-quality-improvement-an-interrupted-time-series-analysis
#9
John W Scott, Jeanne D'Arc Nyinawankusi, Samuel Enumah, Rebecca Maine, Eric Uwitonze, Yihan Hu, Ignace Kabagema, Jean Claude Byiringiro, Robert Riviello, Sudha Jayaraman
INTRODUCTION: Injury is a major cause of premature death and disability in East Africa, and high-quality pre-hospital care is essential for optimal trauma outcomes. The Rwandan pre-hospital emergency care service (SAMU) uses an electronic database to evaluate and optimize pre-hospital care through a continuous quality improvement programme (CQIP), beginning March 2014. MATERIALS AND METHODS: The SAMU database was used to assess pre-hospital quality metrics including supplementary oxygen for hypoxia (O2), intravenous fluids for hypotension (IVF), cervical collar placement for head injuries (c-collar), and either splinting (splint) or administration of pain medications (pain) for long bone fractures...
April 5, 2017: Injury
https://www.readbyqxmd.com/read/28419300/short-term-mechanical-circulatory-support-for-cardiogenic-shock-in-severe-peripartum-cardiomyopathy-la-piti%C3%A3-salp%C3%A3%C2%AAtri%C3%A3-re-experience
#10
Nadia Bouabdallaoui, Pierre Demondion, Pascal Leprince, Guillaume Lebreton
OBJECTIVES: Mechanical circulatory support (MCS) is a valuable option in the setting of cardiogenic shock (CS), although MCS use in severe forms of peripartum cardiomyopathy (PPCM) is underreported. We aimed to investigate maternal outcomes under MCS for refractory CS complicating PPCM. METHODS: We retrospectively reviewed 10 consecutive patients (2010-2015) meeting diagnosis criteria of PPCM that were managed with peripheral veno-arterial extracorporeal membrane oxygenation (pVA-ECMO) for severe CS...
April 16, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28418067/a-case-series-of-vital-signs-controlled-patient-assisted-intravenous-analgesia-vpia-using-remifentanil-for-labour-and-delivery
#11
W L Leong, B L Sng, Q Zhang, N L R Han, R Sultana, A T H Sia
Intravenous remifentanil patient-controlled analgesia can be used during labour as an alternative to epidural analgesia. Adverse effects of opioids, including hypoxia and bradycardia, may lead to maternal morbidity and mortality. We devised an interactive feedback system based on a clinical proportional algorithm, to continuously monitor for adverse effects to enhance safety and better titrate analgesia. This vital signs-controlled, patient-assisted intravenous analgesia with remifentanil used a prototype delivery system linked to a pulse oximeter that evaluated maternal oxygen saturation and heart rate continuously...
April 18, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28412161/the-effect-of-the-apneic-period-on-the-respiratory-physiology-of-patients-undergoing-intubation-in-the-emergency-department
#12
Jason R West, Anthony Scoccimarro, Cody Kramer, Nicholas D Caputo
OBJECTIVES: We sought to examine the physiological impact the apneic period has on the respiratory physiology of patients undergoing intubation in the emergency department and whether DAO, the delivery of 15L oxygen by nasal cannula during apnea, can affect the development of respiratory acidosis. METHODS: This was a prospective observational cohort study conducted at an urban academic level 1 trauma center. A convenience sample of 100 patients was taken. Timed data collection forms were completed during the periintubation period...
April 2, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28410504/exercise-training-in-older-adults-what-effects-on-muscle-oxygenation-a-systematic-review
#13
REVIEW
Elie Fiogbé, Verena de Vassimon-Barroso, Anielle Cristhine de Medeiros Takahashi
AIM: To determine the effects of different modality of exercise training programs on muscle oxygenation in older adults. METHODS: Relevant articles were searched in PubMed, Web of Science, Science Direct and Scopus, using the keywords: "Aged" AND "Muscle oxygenation" AND (Exercise OR "Exercise therapy" OR "Exercise Movement Techniques" OR Hydrotherapy), without limitation concerning the publication date. To be included in the full analysis, the study had to be a randomized controlled trial in which older adults participants (mean age: 65 years at least) were submitted to an exercise-training program and muscle oxygenation assessment...
March 20, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28409759/influence-of-central-hemodynamics-on-vv-ecmo-oxygen-delivery-in-neonatal-animal-model
#14
M M Said, O Rivera, G T Mikesell, K Rais-Bahrami
BACKGROUND: Recirculation of oxygenated blood in venovenous extracorporeal membrane oxygenation (VV ECMO) can decrease the oxygen delivery provided by the ECMO support. This study investigated the influence of central hemodynamics and catheter position on the amount of recirculation and oxygen delivery during VV ECMO. METHODS: Recirculation was measured in seven newborn lambs (mean weight 4.7 kg) during VV ECMO using the ELSA Monitor (Transonic Systems, Inc., Ithaca, NY) and using the central venous line (CVL) method...
April 8, 2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/28404774/changes-in-the-location-of-biodiversity-ecosystem-function-hot-spots-across-the-seafloor-landscape-with-increasing-sediment-nutrient-loading
#15
Simon F Thrush, Judi E Hewitt, Casper Kraan, A M Lohrer, Conrad A Pilditch, Emily Douglas
Declining biodiversity and loss of ecosystem function threatens the ability of habitats to contribute ecosystem services. However, the form of the relationship between biodiversity and ecosystem function (BEF) and how relationships change with environmental change is poorly understood. This limits our ability to predict the consequences of biodiversity loss on ecosystem function, particularly in real-world marine ecosystems that are species rich, and where multiple ecosystem functions are represented by multiple indicators...
April 12, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28404592/accounting-for-oxygen-in-the-renal-cortex-a-computational-study-of-factors-that-predispose-the-cortex-to-hypoxia
#16
Chang-Joon Lee, Bruce S Gardiner, Jennifer P Ngo, Saptarshi Kar, Roger G Evans, David W Smith
We develop a pseudo-3D model of oxygen transport for the renal cortex of the rat, incorporating both the axial and radial geometry of the pre-glomerular circulation and quantitative information regarding the surface areas and transport from the vasculature and renal corpuscles. The computational model was validated by simulating four sets of published experimental studies of renal oxygenation in rats. Under the control conditions, the predicted cortical tissue oxygen tension (PtO2) or microvascular oxygen tension (µPO2) were within ± 1 standard error of the mean value (SEM) observed experimentally...
April 12, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28403290/non-pharmacological-measures-in-preterm-newborns-submitted-to-arterial-puncture
#17
Gleicia Martins de Melo, Maria Vera Lúcia Moreira Leitão Cardoso
OBJECTIVE: to assess pain in preterm newborns and to compare the neonatal and therapeutic variables with the total scores of the Neonatal Facial Coding System of preterm newborns submitted to arterial puncture exposed to music and 25% oral glucose. METHOD: a comparative study with 48 recordings of preterm newborns - Group 1, music (26); Group 2, glucose 25% (22) - individually analyzed by three trained nurses, after Kappa of at least 80%. RESULTS: the variables and the pain scores of the groups did not present statistical significance (p < 0...
April 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28401511/deep-phenotyping-of-systemic-arterial-hemodynamics-in-hfpef-part-2-clinical-and-therapeutic-considerations
#18
Julio A Chirinos
Multiple phase III trials over the last few decades have failed to demonstrate a clear benefit of various pharmacologic interventions in heart failure with a preserved left ventricular (LV) ejection fraction (HFpEF). Therefore, a better understanding of its pathophysiology is important. An accompanying review describes key technical and physiologic aspects regarding the deep phenotyping of arterial hemodynamics in HFpEF. This review deals with the potential of this approach to enhance our clinical, translational, and therapeutic approach to HFpEF...
April 11, 2017: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/28399181/evolutionary-emergence-of-angiogenesis-in-avascular-tumors-using-a-spatial-public-goods-game
#19
Javad Salimi Sartakhti, Mohammad Hossein Manshaei, David Basanta, Mehdi Sadeghi
Natural selection in cancer often results in the emergence of increasingly malignant tumor cells that display many if not all of the hallmarks of cancer. One of the most important traits acquired during cancer progression is angiogenesis. Tumor cells capable of secreting pro-angiogenic factors can be seen as cooperators where the improved oxygenation, nutrient delivery and waste disposal resulting from angiogenesis could be seen as a public good. Under this view, the relatively costly secretion of molecular signals required to orchestrate angiogenesis would be undertaken exclusively by cooperating tumor cells but the benefits of angiogenesis would be felt by neighboring tumor cells regardless of their contribution to the process...
2017: PloS One
https://www.readbyqxmd.com/read/28399018/renal-arteriovenous-oxygen-shunting
#20
Willy Kuo, Vartan Kurtcuoglu
PURPOSE OF REVIEW: Renal arteriovenous oxygen shunting has been proposed as a mechanism by which oxygen supplied to the kidney can bypass the renal parenchyma. Shunting could, therefore, play a crucial role in renal hypoxia and hyperoxia. In the absence of suitable quantitative experimental methods, computational modeling has been employed in recent years to estimate the extent and potential impact of oxygen shunting. RECENT FINDINGS: Overestimation of the separation distance between arteries and veins was suggested to be responsible for previous findings that only negligible amounts of oxygen are shunted in the preglomerular vasculature...
April 8, 2017: Current Opinion in Nephrology and Hypertension
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