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https://www.readbyqxmd.com/read/29786729/application-of-a-constant-hole-volume-sanchez-lacombe-equation-of-state-to-mixtures-relevant-to-polymeric-foaming
#1
Kier von Konigslow, Chul B Park, Russell B Thompson
A variant of the Sanchez-Lacombe equation of state is applied to several polymers, blowing agents, and saturated mixtures of interest to the polymer foaming industry. These are low-density polyethylene-carbon dioxide and polylactide-carbon dioxide saturated mixtures as well as polystyrene-carbon dioxide-dimethyl ether and polystyrene-carbon dioxide-nitrogen ternary saturated mixtures. Good agreement is achieved between theoretically predicted and experimentally determined solubilities, both for binary and ternary mixtures...
May 22, 2018: Soft Matter
https://www.readbyqxmd.com/read/29785406/fluid-extravasation-in-shoulder-arthroscopic-surgery-a-systematic-review
#2
REVIEW
Muzammil Memon, Jeffrey Kay, Arian Gholami, Nicole Simunovic, Olufemi R Ayeni
Background: Arthroscopic surgery of the shoulder joint has become increasingly more common given its advantages over open surgery; however, one rare but potentially life-threatening complication is fluid extravasation into the surrounding tissues, causing edema, respiratory compromise, abnormal results on laboratory blood tests, and possibly death. Currently, no systematic review exists that summarizes the existing clinical research on this topic. Purpose: To perform a systematic review on fluid extravasation as a complication of shoulder arthroscopic surgery, specifically assessing clinical presentation, risk factors, management, and outcomes...
May 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29784597/the-association-between-portal-system-vein-diameters-and-outcomes-in-acute-pancreatitis
#3
X J N M Smeets, G Litjens, D W da Costa, W Kievit, H C van Santvoort, M G H Besselink, P Fockens, M J Bruno, J J Kolkman, J P H Drenth, T L Bollen, E J M van Geenen
BACKGROUND/OBJECTIVES: Acute pancreatitis (AP) progresses to necrotizing pancreatitis in 15% of cases. An important pathophysiological mechanism in AP is third spacing of fluids, which leads to intravascular volume depletion. This results in a reduced splanchnic circulation and reduced venous return. Non-visualisation of the portal and splenic vein on early computed tomography (CT) scan, which might be the result of smaller vein diameter due to decreased venous flow, is associated with infected necrosis and mortality in AP...
May 15, 2018: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/29784339/quantification-of-peptides-in-human-synovial-fluid-using-liquid-chromatography-tandem-mass-spectrometry
#4
Araceli Garcia-Ac, Sung Vo Duy, Sébastien Sauvé, Florina Moldovan, V Gaëlle Roullin, Xavier Banquy
A method to explore the stability of two anti-inflammatory peptides in human synovial fluid (HSF) has been developed and validated using liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). The two peptides are BQ123 Cyclo(-D-Trp-D-Asp-L-Pro-D-Val-L-Leu, Mw = 610.7) and R-954 (AcOrn[Oic2 , (αMe)Phe5 , DβNal7 , Ile8 ]desArg9 -bradykinin, Mw = 1194.4). Human synovial fluid samples were analyzed after a protein precipitation step with acetonitrile and dilution with mobile phase. DMSO was used as anti-adsorptive agent...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29783977/effective-coverage-of-essential-inpatient-care-for-small-and-sick-newborns-in-a-high-mortality-urban-setting-a-cross-sectional-study-in-nairobi-city-county-kenya
#5
Georgina A V Murphy, David Gathara, Jacintah Mwachiro, Nancy Abuya, Jalemba Aluvaala, Mike English
BACKGROUND: Effective coverage requires that those in need can access skilled care supported by adequate resources. There are, however, few studies of effective coverage of facility-based neonatal care in low-income settings, despite the recognition that improving newborn survival is a global priority. METHODS: We used a detailed retrospective review of medical records for neonatal admissions to public, private not-for-profit (mission) and private-for-profit (private) sector facilities providing 24×7 inpatient neonatal care in Nairobi City County to estimate the proportion of small and sick newborns receiving nationally recommended care across six process domains...
May 22, 2018: BMC Medicine
https://www.readbyqxmd.com/read/29783728/a-3d-printed-multichannel-viscometer-for-high-throughput-analysis-of-frying-oil-quality
#6
Sein Oh, Byeongyeon Kim, Sungyoung Choi
Viscosity as a sensitive measure of material changes is a potential quality-control parameter for simple and rapid assessment of frying oil quality. However, conventional viscometers require improvements in throughput, portability, cost-effectiveness and usability to be widely adopted for quality-control applications. Here we present a 3D-printed multichannel viscometer for simple, inexpensive and multiplexed viscosity measurement. The multichannel viscometer enables both parallel actuation of multiple fluid flows by pressing the plunger of the viscometer by hand and direct measurement of their relative volumes dispensed with naked eye...
May 19, 2018: Sensors
https://www.readbyqxmd.com/read/29782314/a-retrospective-belgian-multi-center-mri-biomarker-study-in-alzheimer-s-disease-remember
#7
Ellis Niemantsverdriet, Annemie Ribbens, Christine Bastin, Florence Benoit, Bruno Bergmans, Jean-Christophe Bier, Roxanne Bladt, Lene Claes, Peter Paul De Deyn, Olivier Deryck, Bernard Hanseeuw, Adrian Ivanoiu, Jean-Claude Lemper, Eric Mormont, Gaëtane Picard, Eric Salmon, Kurt Segers, Anne Sieben, Dirk Smeets, Hanne Struyfs, Evert Thiery, Jos Tournoy, Eric Triau, Anne-Marie Vanbinst, Jan Versijpt, Maria Bjerke, Sebastiaan Engelborghs
BACKGROUND: Magnetic resonance imaging (MRI) acquisition/processing techniques assess brain volumes to explore neurodegeneration in Alzheimer's disease (AD). OBJECTIVE: We examined the clinical utility of MSmetrix and investigated if automated MRI volumes could discriminate between groups covering the AD continuum and could be used as a predictor for clinical progression. METHODS: The Belgian Dementia Council initiated a retrospective, multi-center study and analyzed whole brain (WB), grey matter (GM), white matter (WM), cerebrospinal fluid (CSF), cortical GM (CGM) volumes, and WM hyperintensities (WMH) using MSmetrix in the AD continuum...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29781012/microfluidic-curved-channel-centrifuge-for-solution-exchange-of-target-microparticles-and-their-simultaneous-separation-from-bacteria
#8
Pouriya Bayat, Pouya Rezai
One of the common operations in sample preparation is to separate specific particles (e.g. target cells, embryos or microparticles) from non-target substances (e.g. bacteria) in a fluid and to wash them into clean buffers for further processing like detection (called solution exchange in this paper). For instance, solution exchange is widely needed in preparing fluidic samples for biosensing at the point-of-care and point-of-use, but still conducted via the use of cumbersome and time-consuming off-chip analyte washing and purification techniques...
May 21, 2018: Soft Matter
https://www.readbyqxmd.com/read/29780875/amyloid-%C3%AE-peptides-are-differentially-vulnerable-to-preanalytical-surface-exposure-an-effect-incompletely-mitigated-by-the-use-of-ratios
#9
Jamie Toombs, Martha S Foiani, Henrietta Wellington, Ross W Paterson, Charles Arber, Amanda Heslegrave, Michael P Lunn, Jonathan M Schott, Selina Wray, Henrik Zetterberg
Introduction: We tested the hypothesis that the amyloid β (Aβ) peptide ratios are more stable than Aβ42 alone when biofluids are exposed to two preanalytical conditions known to modify measurable Aβ concentration. Methods: Human cerebrospinal fluid (CSF) and culture media (CM) from human cortical neurons were exposed to a series of volumes and polypropylene surfaces. Aβ42 , Aβ40 , and Aβ38 peptide concentrations were measured using a multiplexed electrochemiluminescence immunoassay...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/29780743/detection-of-ostecalcin-in-gingival-crevicular-fluid-in-a-group-of-orthodontic-patients
#10
Najwa Adeeb Nassrawin
Aim: To detect osteocalcin (OC) in gingival crevicular fluid (GCF) and to monitor the concentration of OC at what stage inflammation and bone resorption reaches their maximum following orthodontic activation. Materials and Methods: GCF samples were collected from six adult orthodontic patients (mean age = 22.3, range 20-24 years) on 3, 7, 10, 14, 21, 28, and 35 days after activation of orthodontic appliance, from the tooth surface where bone resorption was expected to occur...
March 2018: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29779815/use-of-standard-enteral-formula-versus-enteric-formula-with-prebiotic-content-in-nutrition-therapy-a-randomized-controlled-study-among-neuro-critical-care-patients
#11
Piril Tuncay, Fatma Arpaci, Mutlu Doganay, Deniz Erdem, Arzu Sahna, Hulya Ergun, Dilek Atabey
OBJECTIVE: To compare use of standard enteral formula versus enteric formula with prebiotic content in terms of nutrition therapy related outcomes among neurocritical care patients. METHODS: A total of 46 adult neurocritical care patients who received nutrition therapy with standard enteral formula (SEF group; n = 23) or enteral formula with prebiotic content (EFPC group; n = 23) during their hospitalization in intensive care unit (ICU) were included in this prospective randomized controlled study...
June 2018: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/29779129/practical-impact-of-a-decision-support-for-goal-directed-fluid-therapy-on-protocol-adherence-a-clinical-implementation-study-in-patients-undergoing-major-abdominal-surgery
#12
Alexandre Joosten, Reda Hafiane, Marco Pustetto, Luc Van Obbergh, Thierry Quackels, Alexis Buggenhout, Jean-Louis Vincent, Brigitte Ickx, Joseph Rinehart
The purpose of this study was to assess the effects of using a real time clinical decision-support system, "Assisted Fluid Management" (AFM), to guide goal-directed fluid therapy (GDFT) during major abdominal surgery. We compared a group of patients managed using the AFM system with a historical cohort of patients (control group) who had been managed using a manual GDFT strategy. Adherence to the protocol was defined as the relative intraoperative time spent with a stroke volume variation (SVV) < 13%...
May 19, 2018: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29777855/polymer-lipid-hybrid-nanoparticles-as-enhanced-indomethacin-delivery-systems
#13
Annalisa Dalmoro, Sabrina Bochicchio, Shamil F Nasibullin, Paolo Bertoncin, Gaetano Lamberti, Anna Angela Barba, Rouslan I Moustafine
Non-steroidal anti-inflammatory drugs (NSAIDs), i.e. indomethacin used for rheumatoid arthritis and non-rheumatoid inflammatory diseases, are known for their injurious actions on the gastrointestinal (GI) tract. Mucosal damage can be avoided by using nanoscale systems composed by a combination of liposomes and biodegradable natural polymer, i.e. chitosan, for enhancing drug activity. Aim of this study was to prepare chitosan-lipid hybrid delivery systems for indomethacin dosage through a novel continuous method based on microfluidic principles...
May 16, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29776755/neutral-ph-and-low-glucose-degradation-product-dialysis-fluids-induce-major-early-alterations-of-the-peritoneal-membrane-in-children-on-peritoneal-dialysis
#14
Betti Schaefer, Maria Bartosova, Stephan Macher-Goeppinger, Peter Sallay, Peter Vörös, Bruno Ranchin, Karel Vondrak, Gema Ariceta, Ariane Zaloszyc, Aysun K Bayazit, Uwe Querfeld, Rimante Cerkauskiene, Sara Testa, Christina Taylan, Johan VandeWalle, YokChin Yap, Rafael T Krmar, Rainer Büscher, Anne K Mühlig, Dorota Drozdz, Salim Caliskan, Felix Lasitschka, Sahar Fathallah-Shaykh, Enrico Verrina, Günter Klaus, Klaus Arbeiter, Raj Bhayadia, Anette Melk, Philipp Romero, Bradley A Warady, Franz Schaefer, Akos Ujszaszi, Claus Peter Schmitt
The effect of peritoneal dialysates with low-glucose degradation products on peritoneal membrane morphology is largely unknown, with functional relevancy predominantly derived from experimental studies. To investigate this, we performed automated quantitative histomorphometry and molecular analyses on 256 standardized peritoneal and 172 omental specimens from 56 children with normal renal function, 90 children with end-stage kidney disease at time of catheter insertion, and 82 children undergoing peritoneal dialysis using dialysates with low-glucose degradation products...
May 15, 2018: Kidney International
https://www.readbyqxmd.com/read/29776545/evolution-of-clinical-and-environmental-health-applications-of-exhaled-breath-research-review-of-methods-and-instrumentation-for-gas-phase-condensate-and-aerosols
#15
REVIEW
M Ariel Geer Wallace, Joachim D Pleil
Human breath, along with urine and blood, has long been one of the three major biological media for assessing human health and environmental exposure. In fact, the detection of odor on human breath, as described by Hippocrates in 400 BC, is considered the first analytical health assessment tool. Although less common in comparison to contemporary bio-fluids analyses, breath has become an attractive diagnostic medium as sampling is non-invasive, unlimited in timing and volume, and does not require clinical personnel...
September 18, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29776403/rostral-cranial-fossa-as-a-site-for-cerebrospinal-fluid-drainage-volumetric-studies-in-dog-breeds-of-different-size-and-morphotype
#16
Wojciech Sokołowski, Norbert Czubaj, Michał Skibniewski, Karolina Barszcz, Marta Kupczyńska, Wojciech Kinda, Zdzisław Kiełbowicz
BACKGROUND: Hydrocephalus is a multifactorial condition, whose aetiology is not fully understood. Congenital hydrocephalus frequently occurs in small and brachycephalic dog breeds. Although it is widely accepted that the cribriform plate located in the rostral cranial fossa (RCF) is a site of cerebrospinal fluid (CSF) drainage, the RCF has not been studied extensively. Literature reports indicate that a decreased caudal cranial fossa (CCF) volume in the course of the Chiari-like malformation may obstruct CSF circulation...
May 18, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29775462/analytical-scaling-relations-to-evaluate-leakage-and-intrusion-in-intermittent-water-supply-systems
#17
David D J Taylor, Alexander H Slocum, Andrew J Whittle
Intermittent water supplies (IWS) deliver piped water to one billion people; this water is often microbially contaminated. Contaminants that accumulate while IWS are depressurized are flushed into customers' homes when these systems become pressurized. In addition, during the steady-state phase of IWS, contaminants from higher-pressure sources (e.g., sewers) may continue to intrude where pipe pressure is low. To guide the operation and improvement of IWS, this paper proposes an analytic model relating supply pressure, supply duration, leakage, and the volume of intruded, potentially-contaminated, fluids present during flushing and steady-state...
2018: PloS One
https://www.readbyqxmd.com/read/29773240/perioperative-risk-factors-that-predict-complications-of-radial-forearm-free-flaps-in-oral-and-maxillofacial-reconstruction
#18
C Wang, G Fu, F Liu, L Liu, M Cao
The aim of the study was to find out what perioperative risk factors predicted complications in patients having reconstructions with radial forearm free flaps (RFFF). We organised a retrospective study of 169 patients (mean (range) age 54 (22-86) years, 100 of whom were female) who had oral and maxillofacial tumours resected, and reconstructed with RFFF, from January 2011-December 2016. We recorded predictive variables, subdivided into: personal and clinical (sex, age, weight, coexisting conditions, history of smoking, radiotherapy, and primary lesions); haemodynamic (perioperative concentrations of haemoglobin and albumin, blood loss, blood transfusion, urinary output (ml), and rate (ml/kg/hour), and infusion rates for crystalloids and colloids (ml/kg/hour, and volumes given intraoperatively and postoperatively for 24hours); and anaesthetic and surgical (American Society of Anesthesiologists(ASA) grade, visual analogue pain score (VAS), and duration of tourniquet and operation)...
May 14, 2018: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29772184/tuning-interfacial-properties-and-processes-by-controlling-the-rheology-and-structure-of-pnipam-particles-at-air-water-interfaces
#19
Armando Maestro, Daniel William Jones, Carmen S de Rojas Sanchez, Eduardo Guzmán, Michael H G Duits, Pietro Cicuta
In this work, by combining controlled experiments on single interfaces with measurements on solitary bubbles and liquid foams, we show that Poly N-Isopropyl Acrylamide (PNIPAM) microgels assembled at air/water interfaces exhibit a solid to liquid transition changing the temperature, and that this is associated with the change in the interfacial microstructure of the PNIPAM particles around their volume phase transition temperature VPTT. We show that the solid behaves as a soft 2D colloidal glass, and that the existence of this solid/liquid transition offers an ideal platform for tuning the permeability of air bubbles covered by PNIPAM and to control macroscopic foam properties such as drainage, stability and foamability...
May 17, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29771528/host-cell-prediction-of-exosomes-using-morphological-features-on-solid-surfaces-analyzed-by-machine-learning
#20
Kazuki Ito, Yuta Ogawa, Keiji Yokota, Sachiko Matsumura, Tamiko Minamisawa, Kanako Suga, Kiyotaka Shiba, Yasuo Kimura, Ayumi Hirano-Iwata, Yuzuru Takamura, Toshio Ogino
Exosomes are extracellular nanovesicles released from any cells and found in any body-fluid. Because exosomes exhibit information of their host cells (secreting cells), their analysis is expected to be a powerful tool for early diagnosis of cancers. To predict the host cells, we extracted multi-dimensional feature data about size, shape, and deformation of exosomes immobilized on solid surfaces by atomic force microscopy (AFM). The key idea is combination of support vector machine (SVM) learning for individual exosome particles and their interpretation by principal component analysis (PCA)...
May 17, 2018: Journal of Physical Chemistry. B
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