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https://www.readbyqxmd.com/read/29150933/design-of-a-novel-continuous-flow-reactor-for-low-ph-viral-inactivation
#1
Stephanie A Parker, Linus Amarikwa, Kevin Vehar, Raquel Orozco, Scott Godfrey, Jon Coffman, Parviz Shamlou, Cameron L Bardliving
Insufficient mixing in laminar flow reactors due to diffusion-dominated flow limits their use in applications where narrow residence time distribution (RTD) is required. The aim of this study was to design and characterize a laminar flow (Re 187.7-375.5) tubular reactor for low pH viral inactivation with enhanced radial mixing via the incorporation of curvature and flow inversions. Towards this aim, the reactor described here, Jig in a Box (JIB), was designed with a flow path consisting of alternating 270° degree turns...
November 18, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29150873/survival-in-patients-with-parkinson-s-disease-after-deep-brain-stimulation-or-medical-management
#2
Frances M Weaver, Kevin T Stroupe, Bridget Smith, Beverly Gonzalez, Zhiping Huo, Lishan Cao, Dolores Ippolito, Kenneth A Follett
OBJECTIVE: Deep brain stimulation has been shown to have a significant long-term beneficial effect on motor function. However, whether it affects survival is not clear. In this study, we compared survival rates for Parkinson's disease (PD) patients who underwent deep brain stimulation (DBS) with those who were medically managed. METHODS: A retrospective analysis of Veterans Affairs and Medicare administrative data of veterans with PD who received DBS and were propensity score matched to a cohort of veterans with PD who did not receive DBS between 2007-2013...
November 18, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29150722/cross-lagged-analysis-of-interplay-between-differential-traits-in-sibling-pairs-validation-and-application-to-parenting-behavior-and-adhd-symptomatology
#3
Arden Moscati, Brad Verhulst, Kevin McKee, Judy Silberg, Lindon Eaves
Understanding the factors that contribute to behavioral traits is a complex task, and partitioning variance into latent genetic and environmental components is a useful beginning, but it should not also be the end. Many constructs are influenced by their contextual milieu, and accounting for background effects (such as gene-environment correlation) is necessary to avoid bias. This study introduces a method for examining the interplay between traits, in a longitudinal design using differential items in sibling pairs...
November 17, 2017: Behavior Genetics
https://www.readbyqxmd.com/read/29150719/preoperative-optimization-for-major-hepatic-resection
#4
REVIEW
Sarah Walcott-Sapp, Kevin G Billingsley
PURPOSE: Major hepatic resections are performed for primary hepatobiliary malignancies, metastatic disease, and benign lesions. Patients with chronic liver disease, including cirrhosis and steatosis, are at an elevated risk of malnutrition and impaired strength and exercise capacity, deficits which cause increased risk of postoperative complications and mortality. The aims of this report are to discuss the pathophysiology of changes in nutrition, exercise capacity, and muscle strength in patient populations likely to require major hepatectomy, and review recommendations for preoperative evaluation and optimization...
November 18, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/29150696/impact-of-prolonged-overfeeding-on-skeletal-muscle-mitochondria-in-healthy-individuals
#5
Frederico G S Toledo, Darcy L Johannsen, Jeffrey D Covington, Sudip Bajpeyi, Bret Goodpaster, Kevin E Conley, Eric Ravussin
AIMS/HYPOTHESES: Reduced mitochondrial capacity in skeletal muscle has been observed in obesity and type 2 diabetes. In humans, the aetiology of this abnormality is not well understood but the possibility that it is secondary to the stress of nutrient overload has been suggested. To test this hypothesis, we examined whether sustained overfeeding decreases skeletal muscle mitochondrial content or impairs function. METHODS: Twenty-six healthy volunteers (21 men, 5 women, age 25...
November 17, 2017: Diabetologia
https://www.readbyqxmd.com/read/29150672/fmnh2-dependent-monooxygenases-initiate-catabolism-of-sulfonamides-in-microbacterium-sp-strain-br1-subsisting-on-sulfonamide-antibiotics
#6
Benjamin Ricken, Boris A Kolvenbach, Christian Bergesch, Dirk Benndorf, Kevin Kroll, Hynek Strnad, Čestmír Vlček, Ricardo Adaixo, Frederik Hammes, Patrick Shahgaldian, Andreas Schäffer, Hans-Peter E Kohler, Philippe F-X Corvini
We report a cluster of genes encoding two monooxygenases (SadA and SadB) and one FMN reductase (SadC) that enable Microbacterium sp. strain BR1 and other Actinomycetes to inactivate sulfonamide antibiotics. Our results show that SadA and SadC are responsible for the initial attack of sulfonamide molecules resulting in the release of 4-aminophenol. The latter is further transformed into 1,2,4-trihydroxybenzene by SadB and SadC prior to mineralization and concomitant production of biomass. As the degradation products lack antibiotic activity, the presence of SadA will result in an alleviated bacteriostatic effect of sulfonamides...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150610/implications-of-improved-representations-of-plant-respiration-in-a-changing-climate
#7
Chris Huntingford, Owen K Atkin, Alberto Martinez-de la Torre, Lina M Mercado, Mary A Heskel, Anna B Harper, Keith J Bloomfield, Odhran S O'Sullivan, Peter B Reich, Kirk R Wythers, Ethan E Butler, Ming Chen, Kevin L Griffin, Patrick Meir, Mark G Tjoelker, Matthew H Turnbull, Stephen Sitch, Andy Wiltshire, Yadvinder Malhi
Land-atmosphere exchanges influence atmospheric CO2. Emphasis has been on describing photosynthetic CO2 uptake, but less on respiration losses. New global datasets describe upper canopy dark respiration (R d) and temperature dependencies. This allows characterisation of baseline R d, instantaneous temperature responses and longer-term thermal acclimation effects. Here we show the global implications of these parameterisations with a global gridded land model. This model aggregates R d to whole-plant respiration R p, driven with meteorological forcings spanning uncertainty across climate change models...
November 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/29150539/ros-and-glutathionylation-balance-cytoskeletal-dynamics-in-neutrophil-extracellular-trap-formation
#8
Darko Stojkov, Poorya Amini, Kevin Oberson, Christiane Sokollik, Andrea Duppenthaler, Hans-Uwe Simon, Shida Yousefi
The antimicrobial defense activity of neutrophils partly depends on their ability to form neutrophil extracellular traps (NETs), but the underlying mechanism controlling NET formation remains unclear. We demonstrate that inhibiting cytoskeletal dynamics with pharmacological agents or by genetic manipulation prevents the degranulation of neutrophils and mitochondrial DNA release required for NET formation. Wiskott-Aldrich syndrome protein-deficient neutrophils are unable to polymerize actin and exhibit a block in both degranulation and DNA release...
November 17, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/29150516/drna-seq-implicates-sulfide-as-master-regulator-of-s-0-metabolism-in-chlorobaculum-tepidum-and-other-green-sulfur-bacteria
#9
Jacob M Hilzinger, Vidhyavathi Raman, Kevin E Shuman, Brian J Eddie, Thomas E Hanson
The green sulfur bacteria (Chlorobiaceae) are anaerobes that use electrons from reduced sulfur compounds (sulfide, S(0), and thiosulfate) as electron donors for photoautotrophic growth. Chlorobaculum tepidum, the model system for the Chlorobiaceae, both produces and consumes extracellular S(0) globules depending on the availability of sulfide in the environment. These physiological changes imply significant changes in gene regulation, which has been observed when sulfide is added to Cba. tepidum growing on thiosulfate...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29150504/temporal-stability-of-escherichia-coli-concentrations-in-waters-of-two-irrigation-ponds-in-maryland
#10
Yakov Pachepsky, Rachel Kierzewski, Matthew Stocker, Kevin Sellner, Walter Mulbry, Hoonsoo Lee, Moon Kim
Fecal contamination of water sources is an important water quality issue for agricultural irrigation ponds. Escherichia coli concentrations are commonly used to evaluate recreational and irrigation water quality. We hypothesized that there may exist temporally stable spatial patterns of E. coli concentrations across ponds meaning that some areas mostly have higher and other have mostly lower than average concentrations of E. coli To test this hypothesis, we sampled two irrigation ponds in Maryland in nodes of spatial grids biweekly during the summer of 2016...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29150468/prevalence-and-recognition-of-obesity-and-its-associated-comorbidities-cross-sectional-analysis-of-electronic-health-record-data-from-a-large-us-integrated-health-system
#11
Kevin M Pantalone, Todd M Hobbs, Kevin M Chagin, Sheldon X Kong, Brian J Wells, Michael W Kattan, Jonathan Bouchard, Brian Sakurada, Alex Milinovich, Wayne Weng, Janine Bauman, Anita D Misra-Hebert, Robert S Zimmerman, Bartolome Burguera
OBJECTIVE: To determine the prevalence of obesity and its related comorbidities among patients being actively managed at a US academic medical centre, and to examine the frequency of a formal diagnosis of obesity, via International Classification of Diseases, Ninth Revision (ICD-9) documentation among patients with body mass index (BMI) ≥30 kg/m(2). DESIGN: The electronic health record system at Cleveland Clinic was used to create a cross-sectional summary of actively managed patients meeting minimum primary care physician visit frequency requirements...
November 16, 2017: BMJ Open
https://www.readbyqxmd.com/read/29150311/functional-connectivity-of-the-vigilant-attention-network-in-children-and-adolescents-with-attention-deficit-hyperactivity-disorder
#12
Florian D Zepf, Sarah Bubenzer-Busch, Kevin C Runions, Pradeep Rao, Janice W Y Wong, Simone Mahfouda, Hugo A E Morandini, Richard M Stewart, Julia K Moore, Caroline S Biskup, Simon B Eickhoff, Gereon R Fink, Robert Langner
The ability to maintain attention to simple tasks (i.e., vigilant attention, VA) is often impaired in attention-deficit/hyperactivity disorder (ADHD), but the underlying pathophysiological mechanisms at the brain network level are not clear yet. We therefore investigated ADHD-related differences in resting-state functional connectivity within a meta-analytically defined brain network of 14 distinct regions subserving VA (comprising 91 connections in total), as well as the association of connectivity with markers of behavioural dysfunction in 17 children (age range: 9-14 years) with a diagnosis of ADHD and 21 age-matched neurotypical controls...
November 14, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/29149856/naukan-ethnobotany-in-post-soviet-times-lost-edibles-and-new-medicinals
#13
Kevin A Jernigan, Olga S Belichenko, Valeria B Kolosova, Darlene J Orr
BACKGROUND: This study focuses on health-related plant use among speakers of the critically endangered Naukan language (Inuit-Yupik-Unangan family) in the Russian Far East. The Naukan people were forced, in 1958, under Soviet consolidation, to move from their original settlement on Cape Dezhnev, leading to significant changes in spiritual worldview, subsistence, social structure, and language proficiency in the years that followed. Here, we focus on changes that elders report in their edible, medicinal, and spiritual uses of local plant species since their childhood...
November 17, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/29149574/transscleral-passive-and-iontophoretic-transport-theory-and-analysis
#14
S Kevin Li, Jinsong Hao
INTRODUCTION: The sclera is considered the "static barrier," a main barrier for transscleral drug delivery. The characterization of passive and iontophoretic transport across the sclera in vitro is the first step towards our ability to predict transscleral drug delivery. Although previous studies have investigated this topic, the quantitative structure permeation relationships (QSPR) for passive and iontophoretic transscleral transport are not available. AREAS COVERED: This review evaluated previous passive permeation and iontophoresis results of transscleral transport in vitro and examined QSPR for transscleral permeation of small permeants and macromolecules...
November 17, 2017: Expert Opinion on Drug Delivery
https://www.readbyqxmd.com/read/29149520/compassion-in-practice-evaluating-the-awareness-involvement-and-perceived-impact-of-a-national-nursing-and-midwifery-strategy-amongst-health-care-professionals-in-nhs-trusts-in-england
#15
Helen Allan, Mike O'Driscoll, Liang Liu, Kevin Corbett, Laura Serrant
AIM: To report the findings from an evaluation of the impact of the Compassion in Practice Vision & Strategy (CiPVS) (National Health Service England (NHSE), 2012) on nursing, midwifery and care staff. BACKGROUND: The CiPVS was a programme of work to highlight the importance of compassionate care following the Francis Report in 2013 into the deficits in care in an NHS hospital trust. It was launched by NHS England in 2012 at a time when fiscal cuts were introduced by the Department of Health in England...
November 17, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/29149183/vaccine-effectiveness-against-laboratory-confirmed-influenza-hospitalizations-among-young-children-during-the-2010-11-to-2013-14-influenza-seasons-in-ontario-canada
#16
Sarah A Buchan, Hannah Chung, Michael A Campitelli, Natasha S Crowcroft, Jonathan B Gubbay, Timothy Karnauchow, Kevin Katz, Allison J McGeer, J Dayre McNally, David Richardson, Susan E Richardson, Laura C Rosella, Andrew Simor, Marek Smieja, Dat Tran, George Zahariadis, Jeffrey C Kwong
Uncertainty remains regarding the magnitude of effectiveness of influenza vaccines for preventing serious outcomes, especially among young children. We estimated vaccine effectiveness (VE) against laboratory-confirmed influenza hospitalizations among children aged 6-59 months. We used the test-negative design in hospitalized children in Ontario, Canada during the 2010-11 to 2013-14 influenza seasons. We used logistic regression models adjusted for age, season, and time within season to calculate VE estimates by vaccination status (full vs...
2017: PloS One
https://www.readbyqxmd.com/read/29149155/lower-cutoffs-for-lc-ms-ms-urine-drug-testing-indicates-better-patient-compliance
#17
Kevin Krock, Amadeo Pesce, Dennis Ritz, Richard Thomas, Agnes Cua, Ryan Rogers, Phil Lipnick, Kristen Kilbourn
BACKGROUND: Urine drug testing is used by health care providers to determine a patient's compliance to their prescribed regimen and to detect non-prescribed medications and illicit drugs. However, the cutoff levels used by clinical labs are often arbitrarily set and may not reflect the urine drug concentrations of compliant patients. OBJECTIVES: Our aim was to test the hypothesis that commonly used cutoffs for many prescribed and illicit drugs were set too high, and methods using these cutoffs may yield a considerable number of false-negative results...
November 2017: Pain Physician
https://www.readbyqxmd.com/read/29149150/the-hopeless-case-palliative-cryoablation-and-cementoplasty-procedures-for-palliation-of-large-pelvic-bone-metastases
#18
Tyler M Coupal, Kevin Pennycooke, Paul I Mallinson, Hugue A Ouellette, Paul W Clarkson, Pippa Hawley, Peter L Munk
BACKGROUND: Metastases to the bone are common in cancer patients, and it has been estimated that up to 50% of patients with pelvic bone metastases will not achieve adequate pain control with medications alone. This has led to a paradigm shift over recent years towards the use and development of minimally invasive image-guided treatment options for palliation of bony metastases. Despite these developments, large metastatic lesions are still often considered to be "hopeless cases" that would garner little to no benefit from image-guided intervention...
November 2017: Pain Physician
https://www.readbyqxmd.com/read/29149118/perceived-self-efficacy-a-concept-analysis-for-symptom-management-in-patients-with-cancer%C3%A2
#19
Lynn L White, Marlene Z Cohen, Ann M Berger, Kevin A Kupzyk, Barbara A Swore-Fletcher, Philip J Bierman
BACKGROUND: Perceived self-efficacy (PSE) for symptom management plays a key role in outcomes for patients with cancer, such as quality of life, functional status, symptom distress, and healthcare use. Definition of the concept is necessary for use in research and to guide the development of interventions to facilitate PSE for symptom management in patients with cancer.
. OBJECTIVES: This analysis will describe the concept of PSE for symptom management in patients with cancer...
December 1, 2017: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/29148951/reframing-consent-for-clinical-research-a-function-based-approach
#20
Neal W Dickert, Nir Eyal, Sara F Goldkind, Christine Grady, Steven Joffe, Bernard Lo, Franklin G Miller, Rebecca D Pentz, Robert Silbergleit, Kevin P Weinfurt, David Wendler, Scott Y H Kim
Although informed consent is important in clinical research, questions persist regarding when it is necessary, what it requires, and how it should be obtained. The standard view in research ethics is that the function of informed consent is to respect individual autonomy. However, consent processes are multidimensional and serve other ethical functions as well. These functions deserve particular attention when barriers to consent exist. We argue that consent serves seven ethically important and conceptually distinct functions...
December 2017: American Journal of Bioethics: AJOB
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