keyword
MENU ▼
Read by QxMD icon Read
search

Proof of concept

keyword
https://www.readbyqxmd.com/read/28551209/electromagnetic-induction-of-foam-based-nanoscale-zerovalent-iron-nzvi-particles-to-thermally-enhance-non-aqueous-phase-liquid-napl-volatilization-in-unsaturated-porous-media-proof-of-concept
#1
Supawan Srirattana, Kitsanateen Piaowan, Gregory V Lowry, Tanapon Phenrat
Nanoscale zerovalent iron (NZVI) is a promising remediation agent for volatile organic compound (VOC) contamination in saturated sub-surfaces, but is rarely applied to the vadose zone as there are not enough water molecules in the unsaturated zone to participate in reductive dechlorination. In this study, we evaluated the possibility of using foam as a carrying vehicle to emplace NZVI in unsaturated porous media followed by the application of low frequency-electromagnetic field (LF-EMF) to enhance VOC volatilization in laboratory batch reactors...
May 20, 2017: Chemosphere
https://www.readbyqxmd.com/read/28549273/body-weight-supported-bedside-treadmill-training-facilitates-ambulation-in-icu-patients-an-interventional-proof-of-concept-study
#2
Juultje Sommers, Denise C Wieferink, Dave A Dongelmans, Frans Nollet, Raoul H H Engelbert, Marike van der Schaaf
PURPOSE: Early mobilisation is advocated to improve recovery of intensive care unit (ICU) survivors. However, severe weakness in combination with tubes, lines and machinery are practical barriers for the implementation of ambulation with critically ill patients. The aim of this study was to explore the feasibility of Body Weight-Supported Treadmill Training (BWSTT) in critically ill patients in the ICU. METHODS: A custom build bedside Body Weight-Supported Treadmill was used and evaluated in medical and surgical patients in the ICU...
May 13, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28549262/passive-sampling-of-wastewater-as-a-tool-for-the-long-term-monitoring-of-community-exposure-illicit-and-prescription-drug-trends-as-a-proof-of-concept
#3
J A Baz-Lomba, Christopher Harman, Malcolm Reid, Kevin V Thomas
A passive sampling device, the Polar Organic Chemical Integrative Sampler (POCIS), was calibrated in-situ over a 4-week period in Oslo (Norway) for 10 illicit drugs and pharmaceuticals with the goal of developing an approach for monitoring long-term wastewater drug loads. The calibrations were performed in triplicate using three different overlapping calibration sets under changing environmental conditions that allowed the uncertainty of the sampling rates to be evaluated. All 10 compounds exhibited linear uptake kinetics and provided sampling rates of between 0...
May 20, 2017: Water Research
https://www.readbyqxmd.com/read/28547729/doctors-and-nurses-perceptions-of-a-ward-based-pharmacist-in-rural-northern-sweden
#4
Maria Sjölander, Maria Gustafsson, Gisselle Gallego
Background This project is part of the prospective quasi experimental proof-of-concept investigation of clinical pharmacist intervention study to reduce drug-related problems among people admitted to a ward in a rural hospital in northern Sweden. Objective To explore doctors' and nurses' perceptions and expectations of having a ward-based pharmacist providing clinical pharmacy services. Setting Medical ward in a rural hospital in northern Sweden. Method Eighteen face-to-face semi-structured interviews were conducted with a purposive sample of doctors and nurses working on the ward where the clinical pharmacy service was due to be implemented...
May 25, 2017: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/28547320/real-time-noninvasive-monitoring-of-intracranial-fluid-shifts-during-dialysis-using-volumetric-integral-phase-shift-spectroscopy-vips-a-proof-of-concept-study
#5
Chethan P Venkatasubba Rao, Eric M Bershad, Eusebia Calvillo, Nelson Maldonado, Rahul Damani, Sreedhar Mandayam, Jose I Suarez
BACKGROUND: Cerebral edema, which is associated with increased intracranial fluid, is often a complication of many acute neurological conditions. There is currently no accepted method for real-time monitoring of intracranial fluid volume at the bedside. We evaluated a novel noninvasive technique called "Volumetric Integral Phase-shift Spectroscopy (VIPS)" for detecting intracranial fluid shifts during hemodialysis. METHODS: Subjects receiving scheduled hemodialysis for end-stage renal disease and without a history of major neurological conditions were enrolled...
May 25, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28546833/energy-down-converting-organic-fluorophore-functionalized-mesoporous-silica-hybrids-for-monolith-coated-light-emitting-diodes
#6
Markus Börgardts, Thomas J J Müller
The covalent attachment of organic fluorophores in mesoporous silica matrices for usage as energy down converting phosphors without employing inorganic transition or rare earth metals is reported in this article. Triethoxysilylpropyl-substituted derivatives of the blue emitting perylene, green emitting benzofurazane, and red emitting Nile red were synthesized and applied in the synthesis of mesoporous hybrid materials by postsynthetic grafting to commercially available MCM-41. These individually dye-functionalized hybrid materials are mixed in variable ratios to furnish a powder capable of emitting white light with CIE chromaticity coordinates of x = 0...
2017: Beilstein Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28546541/protective-effect-of-low-dose-intra-articular-cadmium-on-inflammation-and-joint-destruction-in-arthritis
#7
Paola Bonaventura, Guillaume Courbon, Aline Lamboux, Fabien Lavocat, Hubert Marotte, Francis Albarède, Pierre Miossec
Synovium hyperplasia characterizes joint diseases, such as rheumatoid arthritis (RA). The cytotoxic effect of low-dose Cadmium (Cd) was tested in vitro and ex vivo on synoviocytes, the mesenchymal key effector cells of inflammation and proliferation in arthritis. The anti-inflammatory and anti-proliferative effects of Cd were tested in vivo by intra-articular injection in the adjuvant induced arthritis rat joints, where the clinical scores and the consequences of arthritis were evaluated. Cell death through apoptosis was highly induced by Cd in inflammatory synoviocytes (80% reduction of cell viability, p < 0...
May 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28546540/a-bioactive-chemical-markers-based-strategy-for-quality-assessment-of-botanical-drugs-xuesaitong-injection-as-a-case-study
#8
Zhenzhong Yang, Qing Shao, Zhiwei Ge, Ni Ai, Xiaoping Zhao, Xiaohui Fan
Current chemical markers based quality assessment methods largely fail to reflect intrinsic chemical complexity and multiple mechanisms of action of botanical drugs (BD). The development of novel quality markers is greatly needed. Here we propose bioactive chemical markers (BCM), defined as a group of chemo-markers that exhibit similar pharmacological activities comparable to the whole BD, which can therefore be used to effectively assess the quality of BD. As a proof-of-concept, a BCM-based strategy was developed and applied to Xuesaitong Injection (XST) for assessing the efficacy and consistency of different batches...
May 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28545151/provenance-based-data-integrity-checking-and-verification-in-cloud-environments
#9
Muhammad Imran, Helmut Hlavacs, Inam Ul Haq, Bilal Jan, Fakhri Alam Khan, Awais Ahmad
Cloud computing is a recent tendency in IT that moves computing and data away from desktop and hand-held devices into large scale processing hubs and data centers respectively. It has been proposed as an effective solution for data outsourcing and on demand computing to control the rising cost of IT setups and management in enterprises. However, with Cloud platforms user's data is moved into remotely located storages such that users lose control over their data. This unique feature of the Cloud is facing many security and privacy challenges which need to be clearly understood and resolved...
2017: PloS One
https://www.readbyqxmd.com/read/28545122/spot-a-novel-and-streamlined-microarray-platform-for-observing-cellular-trna-levels
#10
Simon Grelet, Ariel McShane, Eveline Hok, Jensen Tomberlin, Philip H Howe, Renaud Geslain
Recent studies have placed transfer RNA (tRNA), a housekeeping molecule, in the heart of fundamental cellular processes such as embryonic development and tumor progression. Such discoveries were contingent on the concomitant development of methods able to deliver high-quality tRNA profiles. The present study describes the proof of concept obtained in Escherichia coli (E. coli) for an original tRNA analysis platform named SPOt (Streamlined Platform for Observing tRNA). This approach comprises three steps. First, E...
2017: PloS One
https://www.readbyqxmd.com/read/28544947/measuring-cortical-motor-hemodynamics-during-assisted-stepping-an-fnirs-feasibility-study-of-using-a-walker
#11
Andrea Cristina de Lima-Pardini, Guilherme A Zimeo Morais, Joana Bisol Balardin, Daniel Boari Coelho, Nametala Maia Azzi, Luis Augusto Teixeira, João Ricardo Sato
Walkers are commonly prescribed worldwide to individuals unable to walk independently. Walker usage leads to improved postural control and voluntary movement during step. In the present study, we aimed to provide a concept-proof on the feasibility of an event-related protocol integrating the analyses of biomechanical variables of step initiation and functional near-infrared spectroscopy (fNIRS) to measure activation of the supplementary motor area (SMA) while using a walker. Healthy young participants were tested while stepping with versus without the use of the walker...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544648/effects-of-a-web-based-patient-decision-aid-on-biologic-and-small-molecule-agents-for-rheumatoid-arthritis-answer-2-a-proof-of-concept-study
#12
Linda C Li, Chris Shaw, Diane Lacaille, Elaine Yacyshyn, C Allyson Jones, Cheryl Koehn, Alison M Hoens, Jasmina Geldman, Eric C Sayre, Graham Macdonald, Jenny Leese, Nick Bansback
OBJECTIVES: To assess the extent to which ANSWER-2, an interactive online patient decision aid, reduces patients' decisional conflict and improves their medication-related knowledge and self-management capacity. METHODS: We used a pre-post study design. Eligible participants had a diagnosis of rheumatoid arthritis (RA), had been recommended to start using a biologic or small molecule agent or to switch to a new one, and had Internet access. Access to ANSWER-2 was provided immediately after enrollment...
May 23, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28544598/from-extended-nano-fluidics-to-an-autonomous-solar-light-driven-micro-fuel-cell-device
#13
Yuriy Pihosh, Jin Uemura, Ivan Turkevych, Kazuma Mawatari, Yutaka Kazoe, Adelina Smirnova, Takehiko Kitamori
Autonomous micro/nano mechanical, chemical and biomedical sensors require persistent power sources scaled to their size. Realization of autonomous micro-power sources is a challenging task, as it requires combination of wireless energy supply, conversion, storage and delivery to the sensor. In this work, we realized solar light driven power source that consists of a micro fuel cell (μFC) and a photocatalytic micro fuel generator (μFG) integrated on a single microfluidic chip. The μFG produces hydrogen by photocatalytic water splitting under solar light...
May 23, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28544547/a-membrane-free-neutral-ph-formate-fuel-cell-enabled-by-a-selective-nickel-sulfide-oxygen-reduction-catalyst
#14
Bing Yan, Nolan M Concannon, Jarrod D Milshtein, Fikile R Brushett, Yogesh Surendranath
Polymer electrolyte membranes employed in contemporary fuel cells severely limit device design and restrict catalyst choice, but are essential for preventing short-circuiting reactions at unselective anode and cathode catalysts. Herein, we report that nickel sulfide Ni3 S2 is a highly selective catalyst for the oxygen reduction reaction in the presence of 1.0 m formate. We combine this selective cathode with a carbon-supported palladium (Pd/C) anode to establish a membrane-free, room-temperature formate fuel cell that operates under benign neutral pH conditions...
May 23, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28544159/simultaneous-measurement-of-t1-b1-and-pharmacokinetic-model-parameters-using-active-contrast-encoding-ace-mri
#15
Jin Zhang, Kerryanne Winters, Olivier Reynaud, Sungheon Gene Kim
The aim of this study was to assess the feasibility of combining dynamic contrast enhanced-magnetic resonance imaging (DCE-MRI) with the measurement of the radiofrequency (RF) transmit field B1 and pre-contrast longitudinal relaxation time T10 . A novel approach has been proposed to simultaneously estimate B1 and T10 from a modified DCE-MRI scan that actively encodes the washout phase of the curve with different amounts of T1 and B1 weighting using multiple flip angles and repetition times, hence referred to as active contrast encoding (ACE)-MRI...
May 22, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28541760/inhibition-of-proteases-activity-in-intestine-needs-a-sustainable-acidic-environment-rather-than-a-transient
#16
Chang Xing, Jin-Feng Xing, Zhi-Qiang Ge
α-Chymotrypsin (α-CT) and trypsin are important components of the enzymatic barrier. They could degrade the therapeutic proteins and peptides, inhibit their activity consequently, and thereby reduce their oral bioavailability. Acidic agents, as one type of indirect protease inhibitors, have shown proof of concept in clinical trials. We report here the inactivated proteases due to acid influence can be reactivated immediately by environmental pH recovery regardless of how long the inactivation last. To keep the inactivation time of proteases for 4 to 5 h, we designed and prepared a sustained-release tablet containing citric acid (CA) which can effectively reduce the pH below 5...
May 25, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28541681/platelet-microcapsule-hybrids-leverage-contractile-force-for-targeted-delivery-of-hemostatic-agents
#17
Caroline E Hansen, David R Myers, Wallace Hunter Baldwin, Yumiko Sakurai, Shannon L Meeks, L Andrew Lyon, Wilbur A Lam
We report a cell-mediated, targeted drug delivery system utilizing polyelectrolyte multilayer capsules that hybridize with the patient's own platelets upon intravenous administration. The hybridized platelets function as the sensor and actuator for targeted drug delivery and controlled release in our system. These capsules are biochemically and mechanically tuned to enable platelet adhesion and capsule rupture upon platelet activation and contraction, enabling the targeted and controlled "burst" release of an encapsulated biotherapeutic...
May 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28541524/metal-bound-clamp-tag-inhibits-proteolytic-cleavage
#18
Michaela L McNiff, Jennifer S Chadwick
Biologics can be an improvement to small molecule drugs, providing high specificity for an identified target, lowering toxicity and limiting side effects. To achieve effective delivery, the biologic must have sufficient time to reach the target tissue. A prolonged half-life in the circulating environment is desired, but often serum stability is limited by proteases. Proteolysis in the serum causes degradation and inactivation as the biologic is fragmented and more rapidly cleared from the body. To improve the circulating half-life, large, hydrophilic polymers may be conjugated or stable fusion tags may be engineered to increase the effective size of the peptide and to hinder degradation by proteases...
May 25, 2017: Protein Engineering, Design & Selection: PEDS
https://www.readbyqxmd.com/read/28540060/microparticle-formation-in-peritoneal-dialysis-a-proof-of-concept-study
#19
Shareef Akbari, Rima Abou-Arkoub, Suzy Sun, Swapnil Hiremath, Arkadiy Reunov, Brendan B McCormick, Marcel Ruzicka, Dylan Burger
BACKGROUND: Injury to the mesothelial layer of the peritoneal membrane during peritoneal dialysis (PD) is implicated in loss of ultrafiltration capacity, but there are no validated biomarkers for mesothelial cell injury. Microparticles (MPs) are 0.1 to 1.0 µm membrane vesicles shed from the cell surface following injury and are sensitive markers of tissue damage. Formation of MPs in the peritoneal cavity during PD has not been reported to date. METHODS: We designed a single-center, proof of concept study to assess whether peritoneal solution exposure induces formation of mesothelial MPs suggestive of PD membrane injury...
2017: Canadian Journal of Kidney Health and Disease
https://www.readbyqxmd.com/read/28539272/selenium-nanoparticles-as-versatile-carriers-for-oral-delivery-of-insulin-insight-into-the-synergic-antidiabetic-effect-and-mechanism
#20
Wenji Deng, Qian Xie, Huan Wang, Zhiguo Ma, Baojian Wu, Xingwang Zhang
Oral insulin delivery has been plagued by limited bioavailability. This work reports selenium nanoparticles (SeNPs) for oral insulin delivery to overcome the absorption barrier. Insulin-loaded SeNPs (INS-SeNPs) were fabricated by ionic cross-linking/in situ reduction and characterized by particle size and drug entrapment. The resultant INS-SeNPs were 120nm around in particle size with high drug loading. INS-SeNPs exhibited controllable insulin release and outstanding stability in the digestive fluids. INS-SeNPs caused a significant hypoglycemic effect in both normal and diabetic rats...
May 21, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
keyword
keyword
43964
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"