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https://www.readbyqxmd.com/read/28105746/mitochondrial-energetics-and-calcium-coupling-in-the-heart
#1
Michael Kohlhaas, Alexander G Nickel, Christoph Maack
Contraction and relaxation of the heart consume large amounts of energy that need to be replenished by oxidative phosphorylation in mitochondria, and matching energy supply to demand involves the complimentary control of respiration through ADP and Ca(2+) . In heart failure, an imbalance between ADP and Ca(2+) oxidizes mitochondrial pyridine nucleotides, where NADH oxidation may limit ATP production and contractile function, while NADPH oxidation can induce oxidative stress with consecutive maladaptive remodeling...
January 19, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28105555/malaria-and-economic-evaluation-methods-challenges-and-opportunities
#2
Tom L Drake, Yoel Lubell
There is a growing evidence base on the cost effectiveness of malaria interventions. However, certain characteristics of malaria decision problems present a challenge to the application of healthcare economic evaluation methods. This paper identifies five such challenges. The complexities of (i) declining incidence and cost effectiveness in the context of an elimination campaign; (ii) international aid and its effect on resource constraints; and (iii) supranational priority setting, all affect how health economists might use a cost-effectiveness threshold...
January 19, 2017: Applied Health Economics and Health Policy
https://www.readbyqxmd.com/read/28096353/high-coulombic-efficiency-aluminum-ion-battery-using-an-alcl3-urea-ionic-liquid-analog-electrolyte
#3
Michael Angell, Chun-Jern Pan, Youmin Rong, Chunze Yuan, Meng-Chang Lin, Bing-Joe Hwang, Hongjie Dai
In recent years, impressive advances in harvesting renewable energy have led to a pressing demand for the complimentary energy storage technology. Here, a high Coulombic efficiency (∼99.7%) Al battery is developed using earth-abundant aluminum as the anode, graphite as the cathode, and a cheap ionic liquid analog electrolyte made from a mixture of AlCl3 and urea in a 1.3:1 molar ratio. The battery displays discharge voltage plateaus around 1.9 and 1.5 V (average discharge = 1.73 V) and yielded a specific cathode capacity of ∼73 mAh g(-1) at a current density of 100 mA g(-1) (∼1...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28089082/backcasting-to-identify-food-waste-prevention-and-mitigation-opportunities-for-infant-feeding-in-maternity-services
#4
Yvonne Ryan-Fogarty, Genevieve Becker, Richard Moles, Bernadette O'Regan
Food waste in hospitals is of major concern for two reasons: one, healthcare needs to move toward preventative and demand led models for sustainability and two, food system sustainability needs to seek preventative measures such as diet adaptation and waste prevention. The impact of breast-milk substitute use on health services are well established in literature in terms of healthcare implications, cost and resourcing, however as a food demand and waste management issue little has been published to date. This paper presents the use of a desk based backcasting method to analyse food waste prevention, mitigation and management options within the Irish Maternity Service...
January 6, 2017: Waste Management
https://www.readbyqxmd.com/read/28079948/induction-of-antibodies-directed-against-branched-core-o-mannosyl-glycopeptides-selectivity-complimentary-to-the-cona-lectin
#5
Jin Yu, Oliver C Grant, Christian Pett, Sabine Strahl, Robert J Woods, Ulrika Westerlind
Mammalian protein O-mannosylation comprise a group of post-translational modifications (PTMs) involved in muscle and brain development. Despite the enormous progress made, to date the biological impact of the mammalian O-mannosyl glycoproteome remains largely unknown. Tools are still needed to investigate the structure, role and abundance of O-mannosyl glycans. While O-mannosyl branching has been shown to be of relevance in integrin-dependent cell-migration, and also plays a role in demyelinating diseases, a broader understanding of the biological roles of branched O-mannosyl glycans is lacking in part due to the paucity of detection tools...
January 12, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28078463/endoscopic-vacuum-therapy-for-various-defects-of-the-upper-gastrointestinal-tract
#6
Florian Kuehn, Gunnar Loske, Leif Schiffmann, Michael Gock, Ernst Klar
BACKGROUND: Postoperative, iatrogenic or spontaneous upper gastrointestinal defects result in significant morbidity and mortality of the patients. In the last few years, endoscopic vacuum therapy (EVT) has been recognized as a new promising method for repairing upper gastrointestinal defects of different etiology. However, probably due to insufficient data and no commercially available system for EVT of the upper gastrointestinal tract, until the end of 2014, covering of esophageal defects with self-expanding metal stents (SEMS) were still the mainstay of endoscopic therapy...
January 11, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28077670/the-mammalian-efferent-vestibular-system-plays-a-crucial-role-in-vestibulo-ocular-reflex-compensation-after-unilateral-labyrinthectomy
#7
Patrick P Hübner, Serajul I Khan, Americo A Migliaccio
The α9 nicotinic acetylcholine receptor (α9-nAChR) subunit is expressed in the vestibular and auditory periphery, and its loss of function could compromise peripheral input from the predominantly-cholinergic efferent vestibular system (EVS). A recent study has shown that α9-nAChRs play an important role in short-term vestibulo-ocular reflex (VOR) adaptation. We hypothesise that α9-nAChRs could also be important for other forms of vestibular plasticity, such as that needed for VOR recovery after vestibular organ injury...
January 11, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28073839/unsupervised-clustering-of-quantitative-image-phenotypes-reveals-breast-cancer-subtypes-with-distinct-prognoses-and-molecular-pathways
#8
Jia Wu, Yi Cui, Xiaoli Sun, Guohong Cao, Bailiang Li, Debra M Ikeda, Allison W Kurian, Ruijiang Li
PURPOSE: To identify novel breast cancer subtypes by extracting quantitative imaging phenotypes of the tumor and surrounding parenchyma, and to elucidate the underlying biological underpinnings and evaluate the prognostic capacity for predicting recurrence-free survival (RFS). METHODS: We retrospectively analyzed dynamic contrast-enhanced magnetic resonance imaging data of patients from a single-center discovery cohort (n=60) and an independent multi-center validation cohort (n=96)...
January 10, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28068288/monitoring-of-breath-vocs-and-electrical-impedance-tomography-under-pulmonary-recruitment-in-mechanically-ventilated-patients
#9
Beate Brock, Svend Kamysek, Josephine Silz, Phillip Trefz, Jochen K Schubert, Wolfram Miekisch
Analysis of exhaled VOCs can provide information on physiology, metabolic processes, oxidative stress and lung diseases. In critically ill patients, VOC analysis may be used to gain complimentary information beyond global clinical parameters. This seems especially attractive in mechanically ventilated patients frequently suffering from impairment of gas exchange. This study was intended to assess (a) the effects of recruitment maneuvers onto VOC profiles, (b) the correlations between electrical impedance tomography (EIT) data and VOC profiles and (c) the effects of recruitment onto distribution of ventilation...
January 9, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28066101/comparison-of-efficacy-safety-and-cost-effectiveness-of-montelukast-levocetirizine-and-montelukast-fexofenadine-in-patients-of-allergic-rhinitis-a-randomized-double-blind-clinical-trial
#10
Mohini Sachin Mahatme, Ganesh Natthuji Dakhale, Kanchan Tadke, Sachin Keshaorao Hiware, S D Dudhgaonkar, Sumit Wankhede
OBJECTIVES: Allergic rhinitis (AR) is a global health problem. Almost 10%-25% of population worldwide is affected by AR. Oral/intranasal H1-antihistamine, decongestants, leukotriene receptor antagonists, and intranasal corticosteroids are the pillars in the management of AR. The combination therapy of montelukast with antihistaminic provides enhancing and complimentary effects, thereby reducing the symptoms effectively, but there are scanty data regarding the comparisons of combinations...
November 2016: Indian Journal of Pharmacology
https://www.readbyqxmd.com/read/28065317/preparation-of-centralspindlin-as-an-active-heterotetramer-of-kinesin-and-gtpase-activating-protein-subunits-for-in-vitro-structural-and-functional-assays
#11
M Mishima
Centralspindlin is a crucial regulator of animal cytokinesis, consisting of MKLP1 kinesin-6 and CYK4 Rho-family GTPase activating protein (RhoGAP). As a microtubule-bundling protein, it plays a crucial role in the formation of the central spindle. Through distinct accumulation to the antiparallel microtubule overlaps at the central spindle and the midbody, it recruits various downstream factors to the site of cell division as well as anchors the plasma membrane to maintain the narrow intercellular channels between the daughter cells until their final separation (abscission)...
2017: Methods in Cell Biology
https://www.readbyqxmd.com/read/28048364/we-fg-207a-01-introduction-to-dedicated-breast-ct-early-studies
#12
S Vedantham
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047807/su-d-brb-02-combining-a-commercial-autoplanning-engine-with-database-dose-predictions-to-further-improve-plan-quality
#13
S P Robertson, J A Moore, X Hui, T L DeWeese, P Tran, H Quon, Z Cheng, K Bzdusek, P Kumar, T R McNutt
PURPOSE: Database dose predictions and a commercial autoplanning engine both improve treatment plan quality in different but complimentary ways. The combination of these planning techniques is hypothesized to further improve plan quality. METHODS: Four treatment plans were generated for each of 10 head and neck (HN) and 10 prostate cancer patients, including Plan_A: traditional IMRT optimization using clinically relevant default objectives; Plan_B: traditional IMRT optimization using database dose predictions; Plan_C: autoplanning using default objectives; and Plan_D: autoplanning using database dose predictions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047717/we-fg-207a-02-why-we-need-breast-ct-clinical-perspective
#14
A O'Connell
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047619/su-g-brc-04-collimator-angle-optimization-in-volumetric-modulated-arc-therapy
#15
A Andersen, C Johnson, G Bartlett, I Das
PURPOSE: Volumetric modulated arc therapy (VMAT) has revolutionized radiation treatment by decreasing treatment time and monitor units, thus reducing scattered and whole body radiation dose. As the collimator angle changes the apparent leaf gap becomes larger which can impact plan quality, organ at risk (OAR) sparing as well as IMRT QA passing rate which is investigated. METHODS: Two sites (prostate and head and neck) that have maximum utilization of VMAT were investigated...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047585/su-d-206-06-task-specific-optimization-of-scintillator-thickness-for-cmos-detector-based-cone-beam-breast-ct
#16
S Vedantham, S Shrestha, L Shi, G Vijayaraghavan, A Karellas
PURPOSE: To optimize the cesium iodide (CsI:Tl) scintillator thickness in a complimentary metal-oxide semiconductor (CMOS)-based detector for use in dedicated cone-beam breast CT. METHODS: The imaging task considered was the detection of a microcalcification cluster comprising six 220µm diameter calcium carbonate spheres, arranged in the form of a regular pentagon with 2 mm spacing on its sides and a central calcification, similar to that in ACR-recommended mammography accreditation phantom, at a mean glandular dose of 4...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047520/we-fg-207a-05-dedicated-breast-ct-as-a-diagnostic-imaging-tool-physics-and-clinical-feasibility
#17
A Karellas
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047068/we-fg-207a-03-low-dose-cone-beam-breast-ct-physics-and-technology-development
#18
J Boone
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046983/su-f-t-641-comparative-study-on-planning-and-delivery-efficiency-of-volumetric-modulated-arc-therapy-between-varian-and-elekta-platforms-for-sbrt-lung-treatment
#19
Varadhan, L Arentsen, S Way, C Overbeck, S Yerich, B Garrity, M Fox
PURPOSE: To compare the plan quality between Eclipse (Varian) and Monaco (Elekta) TPS. To ascertain, if SBRT lung treatment could be delivered in a single coplanar arc (360 degrees) with both Elekta and Varian platforms. To assess if the smaller leaf width in Varian Millennium and Elekta Agility MLC heads have a dosimetric advantage over Elekta MLCi2 head METHODS: Ten SBRT lung patients (PTV volumes ranging from 11 cc to 103cc) who were previously treated on Varian Linac with non-coplanar arcs and received 50Gy in 5 fractions were chosen for this study...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046422/su-f-t-601-equivalence-of-cyberknife-and-truebeam-stx-for-spine-irradiation
#20
J Herrington, M Price, M Schmidt, J Brindle, N Knutson
PURPOSE: To evaluate the equivalence of spine SBRT treatment plans created in Eclipse for the TrueBeam STx (Varian Medical System, Palo Alto, CA) compared to plans using CyberKnife and MultiPlan (Accuray, Sunnyvale, CA). METHODS: CT data and contours for 23 spine SBRT patients previously treated using CyberKnife (CK) were exported from MultiPlan treatment planning system into Eclipse where they were planned using static IMRT 6MV coplanar beams. Plans were created according to the original prescription dose and fractionation schedule while limiting spinal dose according to the RTOG 0631 protocol and maintaining target coverage comparable to the original CK plans...
June 2016: Medical Physics
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