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Fluid optimization

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https://www.readbyqxmd.com/read/28447792/-liquid-crystalline-nanoparticles-rationally-designed-vehicle-to-improve-stability-and-therapeutic-efficacy-of-insulin-following-oral-administration
#1
Ashish Kumar Agrawal, Kuldeep Kumar, Nitin Kumar Swarnakar, Varun Kushwah, Sanyog Jain
In the present report we investigate the feasibility of liquid crystalline nanoparticles (LCNPs) to improve the stability and therapeutic efficacy of insulin following oral administration. Compatibility studies of different formulation ingredients with insulin and extensive optimization of different process variables resulted into the formation of LCNPs with particle size of 245.50 ± 6.36 nm, PDI 0.220 ± 0.042, zeta potential -18.30 ± 1.27 mV with an entrapment efficiency of 44.17 ± 1.47%. Mannitol (5% w/v) was identified as suitable cryoprotectant to produce freeze dried LCNPs without affecting the critical quality attributes of the LCNPs...
April 27, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28447456/numerical-modeling-of-electroosmotic-push-pull-perfusion-and-assessment-of-its-application-to-quantitative-determination-of-enzymatic-activity-in-the-extracellular-space-of-mammalian-tissue
#2
Yangguang Ou, Stephen G Weber
Many sampling methods have been developed to measure the extracellular concentrations of solutes in the extracellular space of mammalian tissue. However, few have been used to quantitatively study the various processes, such as enzymatic degradation, that determines the fate of these solutes. For a method to be useful in this pursuit, it must be able to 1) perfuse tissue and collect the perfusate for quantitative analysis of the solutes introduced and reaction products produced, 2) control the average residence time of the active solutes, and 3) have the appropriate spatial resolution for the process of interest...
April 27, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28447368/optimization-of-aqueous-extraction-and-biological-activity-of-harpagophytum-procumbens-root-on-ex-vivo-rat-colon-inflammatory-model
#3
Marcello Locatelli, Claudio Ferrante, Simone Carradori, Daniela Secci, Lidia Leporini, Annalisa Chiavaroli, Sheila Leone, Lucia Recinella, Giustino Orlando, Sara Martinotti, Luigi Brunetti, Michele Vacca, Luigi Menghini
Harpagophytum procumbens has a long story of use for the treatment of inflammatory diseases. Considering both the antiinflammatory effects of H. procumbens in multiple tissues and the stability of harpagoside in artificial intestinal fluid, the aim of the present study was to explore the possible protective role of a microwave-assisted aqueous Harpagophytum extract (1-1000 μg/mL) on mouse myoblast C2C12 and human colorectal adenocarcinoma HCT116 cell lines, and isolated rat colon specimens challenged with lipopolysaccharide (LPS), a validated ex vivo model of acute ulcerative colitis...
April 26, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28446576/diagnostic-value-of-the-galactomannan-antigen-test-in-serum-and-bronchoalveolar-lavage-fluid-samples-from-patients-with-non-neutropenic-invasive-pulmonary-aspergillosis
#4
Wei Zhou, Hongxing Li, Yan Zhang, Mei Huang, Qian He, Pei Li, Fang Zhang, Yi Shi, Xin Su
Objective: To compare the diagnostic value of galactomannan (GM) detection in bronchoalveolar lavage fluid (BALF) and serum samples from non-neutropenic patients with invasive pulmonary aspergillosis (IPA), and determine the optimal BALF GM cut-off value for pulmonary aspergillosis.Methods: GM detection in BALF and serum samples was performed by enzyme-linked immunosorbent assay (ELISA) in 128 patients with clinically suspected non-neutropenic pulmonary aspergillosis between June 2014 and June 2016. On the basis of the clinical and pathological diagnoses, 8 patients were excluded because their diagnosis was uncertain...
April 26, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28446135/comparison-of-rapid-immunoassays-for-rupture-of-fetal-membranes
#5
Irogue Igbinosa, Ferney A Moore, Cheri Johnson, Jon E Block
BACKGROUND: Rupture of membranes (ROM) before the onset of uterine contractions, particularly in pregnancies less than 37 weeks gestational age, is a common diagnostic problem in obstetrical practice. Timely detection of ROM is vital to support gestational age-specific interventions to optimize perinatal outcomes and minimize the risk of serious complications such as preterm delivery, fetal distress and maternal/fetal infections. Rapid bedside immunoassay tests designed to detect amniotic fluid proteins in cervicovaginal fluids have emerged as valuable clinical tools to provide timely ROM diagnosis...
April 26, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28443480/adverse-placental-perfusion-and-pregnancy-outcomes-in-a-new-nonhuman-primate-model-of-gestational-protein-restriction
#6
Victoria H J Roberts, Jamie O Lo, Katherine S Lewandowski, Peter Blundell, Kevin L Grove, Christopher D Kroenke, Elinor L Sullivan, Charles T Roberts, Antonio E Frias
Maternal malnutrition during pregnancy impacts fetal growth, with developmental consequences that extend to later life outcomes. In underdeveloped countries, this malnutrition typically takes the form of poor dietary protein content and quality, even if adequate calories are consumed. Here, we report the establishment of a nonhuman primate model of gestational protein restriction (PR) in order to understand how placental function and pregnancy outcomes are affected by protein deficiency. Rhesus macaques were assigned to either a control diet containing 26% protein or switched to a 13% PR diet prior to conception and maintained on this PR diet throughout pregnancy...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28441967/comparison-of-csf-markers-and-semi-quantitative-amyloid-pet-in-alzheimer-s-disease-diagnosis-and-in-cognitive-impairment-prognosis-using-the-adni-2-database
#7
Fayçal Ben Bouallègue, Denis Mariano-Goulart, Pierre Payoux
BACKGROUND: The relative performance of semi-quantitative amyloid positron emission tomography (PET) and cerebrospinal fluid (CSF) markers in diagnosing Alzheimer's disease (AD) and predicting the cognitive evolution of patients with mild cognitive impairment (MCI) is still debated. METHODS: Subjects from the Alzheimer's Disease Neuroimaging Initiative 2 with complete baseline cognitive assessment (Mini Mental State Examination, Clinical Dementia Rating [CDR] and Alzheimer's Disease Assessment Scale-Cognitive Subscale [ADAS-cog] scores), CSF collection (amyloid-β1-42 [Aβ], tau and phosphorylated tau) and (18)F-florbetapir scans were included in our cross-sectional cohort...
April 26, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28441936/rationale-and-design-of-bistro-a-randomized-controlled-trial-to-determine-whether-bioimpedance-spectroscopy-guided-fluid-management-maintains-residual-kidney-function-in-incident-haemodialysis-patients
#8
Simon J Davies, Fergus J Caskey, David Coyle, Elizabeth Lindley, Jamie Macdonald, Sandip Mitra, Martin Wilkie, Andrew Davenport, Ken Farrington, Indranil Dasgupta, Paula Ormandy, Lazaros Andronis, Ivonne Solis-Trapala, Julius Sim
BACKGROUND: Preserved residual kidney function (RKF) and normal fluid status are associated with better patient outcomes in incident haemodialysis patients. The objective of this trial is to determine whether using bioimpedance technology in prescribing the optimal post-dialysis weight can reduce the rate of decline of RKF and potentially improve patient outcomes. METHODS/DESIGN: 516 pateints commencing haemodialysis, aged >18 with RKF of > 3 ml/min/1...
April 26, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28440273/active-matter-logic-for-autonomous-microfluidics
#9
Francis G Woodhouse, Jörn Dunkel
Chemically or optically powered active matter plays an increasingly important role in materials design, but its computational potential has yet to be explored systematically. The competition between energy consumption and dissipation imposes stringent physical constraints on the information transport in active flow networks, facilitating global optimization strategies that are not well understood. Here, we combine insights from recent microbial experiments with concepts from lattice-field theory and non-equilibrium statistical mechanics to introduce a generic theoretical framework for active matter logic...
April 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28439837/detection-of-micrornas-using-chip-based-quantstudio-3d-digital-pcr
#10
Cristina Borzi, Linda Calzolari, Davide Conte, Gabriella Sozzi, Orazio Fortunato
Digital PCR (dPCR) is an innovative approach for detection and quantification of nucleic acid that offers an alternative method to conventional real-time quantitative PCR for absolute quantification. dPCR is a highly precise and sensitive technique that does not require a standard reference, making it a suitable method for the detection of microRNAs. The potential of these small noncoding RNA as biomarkers is on the rise, especially due to their presence in body fluids, making them easily accessible. Nevertheless, the problem of lack of consensus regarding an optimal method for miRNAs normalization compromises their use...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28435220/formulation-release-characteristics-and-bioavailability-study-of-gastroretentive-floating-matrix-tablet-and-floating-raft-system-of-mebeverine-hcl
#11
Mohamed A El Nabarawi, Mahmoud H Teaima, Rehab A Abd El-Monem, Nagla A El Nabarawy, Dalia A Gaber
To prolong the residence time of dosage forms within the gastrointestinal tract until all drug is released at the desired rate is one of the real challenges for oral controlled-release drug delivery systems. This study was designed to develop a controlled-release floating matrix tablet and floating raft system of Mebeverine HCl (MbH) and evaluate different excipients for their floating behavior and in vitro controlled-release profiles. Oral pharmacokinetics of the optimum matrix tablet, raft system formula, and marketed Duspatalin(®) 200 mg retard as reference were studied in beagle dogs...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28433336/the-association-of-postoperative-glycemic-control-and-lower-extremity-procedure-outcomes
#12
Todd R Vogel, Jamie B Smith, Robin L Kruse
OBJECTIVE: The effect of postoperative hyperglycemia in patients undergoing open and endovascular procedures on the lower extremities has not been fully characterized with regard to associated admission diagnoses, hospital complications, mortality, and 30-day readmission. This study evaluated the relationship of postoperative hyperglycemia on outcomes after lower extremity vascular procedures for peripheral artery disease. METHODS: Patients with peripheral artery disease admitted for elective lower extremity procedures between September 2008 and March 2014 were selected from the Cerner Health Facts (Cerner Corporation, Kansas City, Mo) database using International Classification of Diseases, Ninth Edition, Clinical Modification diagnosis and procedure codes...
April 19, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28432531/effectiveness-of-nanoencapsulated-methotrexate-against-osteosarcoma-cells-in-vitro-cytotoxicity-under-dynamic-conditions
#13
O Mitxelena-Iribarren, C L Hisey, M Errazquin-Irigoyen, Y González-Fernández, E Imbuluzqueta, M Mujika, M J Blanco-Prieto, S Arana
Cancer is a leading cause of mortality in the world, with osteosarcoma being one of the most common types among children between 1 and 14 years old. Current treatments including preoperative chemotherapy, surgery and postoperative chemotherapy produce several side effects with limited effectiveness. The use of lipid nanoparticles as biodegradable shells for controlled drug delivery shows promise as a more effective and targeted tumor treatment. However, in vitro validation of these vehicles is limited due to fluid stagnation in current techniques, in which nanoparticles sediment onto the bottom of the wells killing the cells by asphyxiation...
June 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28432152/exposure-to-seawater-increases-intestinal-motility-in-euryhaline-rainbow-trout-oncorhynchus-mykiss
#14
Jeroen Brijs, Grant W Hennig, Albin Gräns, Esmée Dekens, Michael Axelsson, Catharina Olsson
Upon exposure to seawater, euryhaline teleosts need to imbibe and desalinate seawater to allow for intestinal ion and water absorption, as this is essential for maintaining osmotic homeostasis. Despite the potential benefits of increased mixing and transport of imbibed water for increasing the efficiency of absorptive processes, the effect of water salinity on intestinal motility in teleosts remains unexplored. By qualitatively and quantitatively describing in vivo intestinal motility of euryhaline rainbow trout (Oncorhynchus mykiss), this study demonstrates that in freshwater, the most common motility pattern consisted of clusters of rhythmic, posteriorly propagating contractions that lasted ∼1-2 minutes followed by a period of quiescence lasting ∼4-5 minutes...
April 21, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28431428/computational-and-in-vitro-experimental-investigation-of-intrathecal-drug-distribution-parametric-study-of-the-effect-of-injection-volume-cerebrospinal-fluid-pulsatility-and-drug-uptake
#15
Kevin M Tangen, Roxanne Leval, Ankit I Mehta, Andreas A Linninger
BACKGROUND: Intrathecal drug delivery is an attractive option to circumvent the blood-brain barrier for pain management through its increased efficacy of pain relief, reduction in adverse side effects, and cost-effectiveness. Unfortunately, there are limited guidelines for physicians to choose infusion or drug pump settings to administer therapeutic doses to specific regions of the spine or the brain. Although empiric trialing of intrathecal drugs is critical to determine the sustained side effects, currently there is no inexpensive in vitro method to guide the selection of spinal drug delivery parameters...
May 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28431170/early-total-enteral-feeding-in-stable-very-low-birth-weight-infants-a-before-and-after-study
#16
Sushma Nangia, Amit Bishnoi, Ankita Goel, Piali Mandal, Soumya Tiwari, Arvind Saili
Background: Fear of necrotizing enterocolitis (NEC) has perpetuated delayed initiation and slow advancement of enteral feeding in very low birth weight (VLBW) infants with inherent risks of parenteral alimentation. The objective of this study was to assess effect of early total enteral feeding (ETEF) on day of achievement of full enteral feeds, feed intolerance, NEC and sepsis. Methods: In total, 208 stable VLBW neonates (28-34 weeks) admitted during 6 month periods of three consecutive years were enrolled...
April 18, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28429840/non-response-to-fluconazole-maintenance-treatment-recidif-regimen-for-recurrent-vulvovaginal-candidosis-is-not-related-to-impaired-glucose-metabolism
#17
Svitrigaile Grinceviciene, Gert Bellen, Kateryna Ruban, Gilbert Donders
Is non-response to maintenance treatment for recurrent vulvovaginal candidosis (RCVV) related to the impaired glucose metabolism? In the ReCiDiF trial, women with RCVV were given a degressive regimen with fluconazole according to their clinical, microscopic and mycologic response. Data obtained from optimal, suboptimal and non-reponding patients were used for secondary analysis of medical history, physical status and family history for potential glucose impairment. Results were presented in means and percentages...
April 21, 2017: Mycoses
https://www.readbyqxmd.com/read/28429271/bisection-method-for-accurate-modeling-and-simulation-of-fouling-in-hollow-fiber-membrane-system
#18
Shuang Liang, Yubo Zhao, Jian Zhang, Lianfa Song
Accurate description and modeling of fouling on hollow fibers imposes a serious challenge to more effective fouling mitigation and performance optimization of the membrane system. Although the governing equations for membrane fouling can be constructed based on the known theories from membrane filtration and fluid dynamics, they are unsolvable analytically due to the complex spatially and temporally varying nature of fouling on hollow fibers. The current available numerical solutions for the governing equations are either unreliable or inconvenient to use because of the uses of unfounded assumptions or cumbersome calculation methods...
April 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28427678/application-and-mechanism-of-ultrasonic-static-mixer-in-heavy-oil-viscosity-reduction
#19
Chunwei Shi, Wei Yang, Jianbin Chen, Xiaoping Sun, Wenyi Chen, Huiyong An, Yili Duo, Mingyuan Pei
In the present study, heavy oil viscosity reduction in Daqing oil field was investigated by using an ultrasonic static mixer. The influence of the ultrasonic power on the viscosity reduction rate was investigated and the optimal technological conditions were determined for the ultrasonic treatment. The mechanism for ultrasonic viscosity reduction was analyzed. The flow characteristics of heavy oil in the mixer under the effect of cavitation were investigated using numerical modeling, and energy consumptions were calculated during the ultrasonic treatment and vis-breaking processes...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28422746/integrating-nanohybrid-membranes-of-reduced-graphene-oxide-chitosan-silica-sol-gel-with-fiber-optic-spr-for-caffeine-detection
#20
Ravi Kant, Rana Tabassum, Banshi D Gupta
Caffeine is the most popular psychoactive drug consumed in the world for improving alertness and enhancing wakefulness. However, caffeine consumption beyond limits can result in lot of physiological complications in human beings. In this work, we report a novel detection scheme for caffeine integrating nanohybrid membranes of reduced graphene oxide (rGO) in chitosan modified silica sol gel (rGO: chitosan: silica sol gel) with fiber optic surface plasmon resonance. The chemically synthesized nanohybrid membrane forming the sensing route has been dip coated over silver coated unclad central portion of an optical fiber...
May 12, 2017: Nanotechnology
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