keyword
MENU ▼
Read by QxMD icon Read
search

reference materials

keyword
https://www.readbyqxmd.com/read/29145092/ionic-liquid-solvent-bar-micro-extraction-of-cdcln-n-2-species-for-ultra-trace-cd-determination-in-seawater
#1
Belén Herce-Sesa, José A López-López, Carlos Moreno
Water analysis of trace metals has been benefited by recent studies on sample preparation by liquid micro-extraction. However, there are still limitations for its application to seawater, such as the need of additives to preserve the sample or the availability of chemical extractants for the selective extraction from highly saline samples. In this work, a three phase solvent bar micro-extraction (3SBME) system containing the ionic liquid trioctylmethylammonium chloride (Aliquat(®) 336) has been used for isolation and pre-concentration of Cd from seawater samples, due to its ability for ionic exchange of CdCln((n-2)-)...
November 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/29144128/proton-driven-intercalation-and-ion-substitution-utilizing-solid-state-electrochemical-reaction
#2
Masaya Fujioka, Chuanbao Wu, Naoki Kubo, Gaoyang Zhao, Atsushi Inoishi, Shigeto Okada, Satoshi Demura, Hideaki Sakata, Manabu Ishimaru, Hideo Kaiju, Junji Nishii
The development of an unconventional synthesis method has a large potential to drastically advance materials science. In this research, a new synthesis method based on a solid-state electrochemical reaction was demonstrated, which can be made available for intercalation and ion substitution. It was referred to as proton-driven ion introduction (PDII). The protons generated by the electrolytic dissociation of hydrogen drive other monovalent cations along a high electric field in the solid state. Utilizing this mechanism, Li(+), Na(+), K(+), Cu(+), and Ag(+) were intercalated into a layered TaS2 single crystal while maintaining high crystallinity...
November 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29143690/standardisation-of-the-japanese-diet-for-use-in-animal-experiments
#3
Saeko Sugawara, Yui Mizowaki, Yui Iwagaki, Yu Sakamoto, Kazushi Yamamoto, Tsuyoshi Tsuduki
The aim of this study was to develop a purified diet that mimics the characteristics of the Japanese diet using readily available materials with a simpler composition and a focus on quality, with the goal of facilitating performance of studies on the Japanese diet worldwide. The utility of the new diet was examined as a mimic of the standard Japanese diet for use in animal experiments. We examined whether a key characteristic of the Japanese diet of being less likely to cause obesity could be reproduced. The mimic diet had a balance of protein, fat and carbohydrate based on the 1975 Japanese diet, which is the least likely to cause obesity, and materials chosen with reference to the National Health and Nutrition Survey (NHNS)...
November 16, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/29143028/frame-metric-and-geodesic-evolution-in-shape-changing-nematic-shells
#4
Cyrus Mostajeran, Mark Warner, Carl D Modes
Non-uniform director fields in flat, responsive, glassy nematic sheets lead to the induction of shells with non-trivial topography on the application of light or heat. Contraction along the director causes metric change, with, in general, the induction of Gaussian curvature, that drives the topography change. We describe the metric change, the evolution of the director field, and the transformation of reference state material curves, e.g. spirals into radii, as curvature develops. The non-isometric deformations associated with heat or light change the geodesics of the surface, intriguingly even in regions where no Gaussian curvature results...
November 16, 2017: Soft Matter
https://www.readbyqxmd.com/read/29142641/accuracy-of-several-implant-bite-registration-techniques-an-in-vitro-pilot-study
#5
Do-Hyun Park, Ji-Man Park, Jae-Won Choi, Eun-Sook Kang, Eun-Bin Bae, Young-Chan Jeon, Chang-Mo Jeong, Mi-Jung Yun, Jung-Bo Huh
PURPOSE: This study evaluated the accuracies of different bite registration techniques for implant-fixed prostheses using three dimensional file analysis. MATERIALS AND METHODS: Implant fixtures were placed on the mandibular right second premolar, and the first and second molar in a polyurethane model. Aluwax (A), Pattern Resin (P), and Blu-Mousse (B) were used as the bite registration materials on the healing abutments (H) or temporary abutments (T). The groups were classified into HA, HP, HB, TA, TP, and TB according to each combination...
October 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29142389/bioactive-constituents-radical-scavenging-and-antibacterial-properties-of-the-leaves-and-stem-essential-oils-from-peperomia-pellucida-l-kunth
#6
Sunday O Okoh, Benson C Iweriebor, Omobola O Okoh, Anthony I Okoh
Background: Peperomia pellucida is an annual herbaceous ethnomedicinal plant used in the treatment of a variety of communicable and noncommunicable diseases in the Amazon region. Objective: The study aimed at profiling the bioactive constituents of the leaves and stem essential oils (LEO and SEO) of P. pellucida, their in vitro antibacterial and radical scavenging properties as probable lead constituents in the management of oxidative stress and infectious diseases...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29141382/-characterization-and-uncertainty-evaluation-of-aqueous-reference-materials-for-cholesterol
#7
W Y Zhou, J Wang, S L Yu, D H Wang, J Zeng, T J Zhang, Y Yan, J T Zhang, W X Chen, C B Zhang
Objective: Characterization and evaluation of the uncertainty of the reference materials of cholesterol in aqueous solution. Methods: The certified reference material GBW09203b was weighed accurately and dissolved into methyl cyclodextrin aqueous solution to prepare six kinds of candidate reference materials of cholesterol according to the concentration. The materials were tested for homogeneity and stability using routine methods and were evaluated the uncertainty derived from the inhomogeneity and instability...
November 14, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29139133/cranial-shape-variation-in-jacarean-caimanines-crocodylia-alligatoroidea-and-its-implications-in-the-taxonomic-status-of-extinct-species-the-case-of-melanosuchus-fisheri
#8
Christian Foth, María Victoria Fernandez Blanco, Paula Bona, Torsten M Scheyer
Melanosuchus niger (Crocodylia, Alligatoroidea) is one of the six living caimanine species widely distributed throughout the Amazon River basin today. Although there is only one extant species of Melanosuchus, fossil material assigned to this genus, represented by M. fisheri, has been reported from the late Miocene in South America. However, the validity of this taxon has been questioned and a recent investigation indicates that the referred specimen of M. fisheri (MCZ 4336) actually belongs to Globidentosuchus brachyrostris, while those diagnostic characters present in the holotype (MCNC 243) fall into the spectrum of intraspecific variation of M...
November 15, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29138890/role-of-rapid-kv-switching-dual-energy-ct-in-assessment-of-post-surgical-local-recurrence-of-pancreatic-adenocarcinoma
#9
Anushri Parakh, Manuel Patino, Daniela Muenzel, Avinash Kambadakone, Dushyant V Sahani
PURPOSE: The purpose of this study is to evaluate the performance of material-specific iodine (MS-I) images generated by rapid kV-switching single-source dual-energy computed tomography (rsDECT) for distinguishing post-operative changes from local tumor recurrence in patients on follow-up for pancreatic adenocarcinoma after surgical resection. METHODS: In this IRB-approved HIPPA-compliant study, retrospective review of 51 patients who underwent surgical resection of pancreatic adenocarcinoma was conducted and were followed up using contrast-enhanced rsDECT (Discovery CT 750HD, GE Healthcare, Milwaukee, WI)...
November 14, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29137659/the-effectiveness-of-research-implementation-strategies-for-promoting-evidence-informed-policy-and-management-decisions-in-healthcare-a-systematic-review
#10
REVIEW
Mitchell N Sarkies, Kelly-Ann Bowles, Elizabeth H Skinner, Romi Haas, Haylee Lane, Terry P Haines
BACKGROUND: It is widely acknowledged that health policy and management decisions rarely reflect research evidence. Therefore, it is important to determine how to improve evidence-informed decision-making. The primary aim of this systematic review was to evaluate the effectiveness of research implementation strategies for promoting evidence-informed policy and management decisions in healthcare. The secondary aim of the review was to describe factors perceived to be associated with effective strategies and the inter-relationship between these factors...
November 14, 2017: Implementation Science: IS
https://www.readbyqxmd.com/read/29137498/core-needle-biopsy-of-thyroid-nodules-outcomes-and-safety-from-a-large-single-center-single-operator-study
#11
Jooae Choe, Jung Hwan Baek, Hye Sun Park, Young Jun Choi, Jeong Hyun Lee
Background There currently remains a debate over the use of core needle biopsy (CNB) or fine needle aspiration (FNA) for diagnosis of thyroid nodules. The major drawbacks of previous CNB studies include heterogeneity of the study population, variable techniques, devices, and operator experience affecting the outcome of the procedure. Purpose To assess the diagnostic performance and safety of CNB of thyroid nodules performed by a single experienced operator in consecutive patients. Material and Methods From January 2012 to December 2012, 538 thyroid nodules that underwent CNB were retrospectively evaluated...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/29137057/readability-of-internet-sourced-patient-education-material-related-to-labour-analgesia
#12
Nilay Boztas, Dilek Omur, Sule Ozbılgın, Gözde Altuntas, Ersan Piskin, Sevda Ozkardesler, Volkan Hanci
We evaluated the readability of Internet-sourced patient education materials (PEMs) related to "labour analgesia." In addition to assessing the readability of websites, we aimed to compare commercial, personal, and academic websites.We used the most popular search engine (http://www.google.com) in our study. The first 100 websites in English that resulted from a search for the key words "labour analgesia" were scanned. Websites that were not in English, graphs, pictures, videos, tables, figures and list formats in the text, all punctuation, the number of words in the text is less than 100 words, feedback forms not related to education, (Uniform Resource Locator) URL websites, author information, references, legal disclaimers, and addresses and telephone numbers were excluded...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29136903/multivariate-optimization-of-a-procedure-employing-microwave-assisted-digestion-for-the-determination-of-nickel-and-vanadium-in-crude-oil-by-icp-oes
#13
Shirlei L Dos Anjos, Jeferson C Alves, Sarah A Rocha Soares, Rennan G O Araujo, Olivia M C de Oliveira, Antonio F S Queiroz, Sergio L C Ferreira
This work presents the optimization of a sample preparation procedure using microwave-assisted digestion for the determination of nickel and vanadium in crude oil employing inductively coupled plasma optical emission spectrometry (ICP OES). The optimization step was performed utilizing a two-level full factorial design involving the following factors: concentrated nitric acid and hydrogen peroxide volumes, and microwave-assisted digestion temperature. Nickel and vanadium concentrations were used as responses...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136894/si-traceable-calibration-free-analysis-for-the-active-concentration-of-g2-epsps-protein-using-surface-plasmon-resonance
#14
Ping Su, Zhangjing He, Liqing Wu, Liang Li, Kangle Zheng, Yi Yang
Active proteins play important roles in the function regulation of human bodies and attract much interest for use in pharmaceuticals and clinical diagnostics. However, the lack of primary methods to analyze active proteins means there is currently no metrology standard for active protein measurement. In recent years, calibration-free concentration analysis (CFCA), which is based on surface plasmon resonance (SPR) technology, has been proposed to determine the active concentration of proteins that have specific binding activity with a binding partner without any higher order standards...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136869/facile-synthesis-of-fe3o4-pda-core-shell-microspheres-functionalized-with-various-metal-ions-a-systematic-comparison-of-commonly-used-metal-ions-for-imac-enrichment
#15
Jiebing Jiang, Xueni Sun, Yan Li, Chunhui Deng, Gengli Duan
Metal ions differed greatly in affinity towards phosphopeptides, and thus it is essential to systematically compare the phosphopeptides enrichment ability of different metal ions usually used in the IMAC techniques. In this work, for the first time, eight metal ions, including Nb(5+), Ti(4+), Zr(4+), Ga(3+), Y(3+), In(3+), Ce(4+), Fe(3+), were immobilized on the polydopamine (PDA)-coated Fe3O4 (denoted as Fe3O4@PDA-M(n+)), and systematically compared by the real biosamples, in addition to standard phosphopeptides...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136865/a-catalytic-spectrophotometric-method-for-determination-of-nanomolar-manganese-in-seawater-using-reverse-flow-injection-analysis-and-a-long-path-length-liquid-waveguide-capillary-cell
#16
Sichao Feng, Dongxing Yuan, Yongming Huang, Kunning Lin, Yong Zhu, Jian Ma
A sensitive and precise method for determination of nanomolar manganese in seawater was developed, using reverse flow injection analysis, a long path length liquid waveguide capillary cell, and spectrophotometric detection. The reaction was based on manganese catalyzed oxidation of leucomalachite green with sodium periodate. Various experimental parameters were investigated and optimized. Foreign trace metal ions of iron, copper, zinc, nickel and aluminum did not cause obvious interference with manganese detection...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136838/a-robotic-magnetic-nanoparticle-solid-phase-extraction-system-coupled-to-flow-batch-analyzer-and-gfaas-for-determination-of-trace-cadmium-in-edible-oils-without-external-pretreatment
#17
Inakã S Barreto, Stefani I E Andrade, Francisco A S Cunha, Marcelo B Lima, Mario Cesar U Araujo, Luciano F Almeida
A lab-made magnetic-mechanical robotic (MMR) system coupled to a flow-batch analyzer (FBA) for magnetic nanoparticles solid phase extraction (MSPE) is presented. As an illustrative application, an NMR-FBA couple was connected to a graphite furnace atomic absorption spectrometer (GFAAS) for quantification of trace cadmium in edible oils. Factors affecting MSPE, such as the amount of adsorbent, the type, concentration and volume of the eluent and elution time were studied. Under the optimized experimental conditions, the interferents studied did not reveal a significant change in the analytical response, indicating that proposed method is selective...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136566/treatment-for-opioid-use-and-outcomes-in-older-adults-a-systematic-literature-review
#18
REVIEW
Anne Marie Carew, Catherine Comiskey
BACKGROUND: Historically, issues relating to problem substance use among older people have received little attention, and have only recently been recognised. METHODS: A literature review of relevant material was conducted in November 2015 to assess current outcome research among older adults treated for opioid dependence. Multiple electronic databases were searched and results were supplemented by grey literature, library and online searches, and relevant references within selected articles...
November 7, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29136418/nano-object-release-during-machining-of-polymer-based-nanocomposites-depends-on-process-factors-and-the-type-of-nanofiller
#19
Yaobo Ding, Wendel Wohlleben, Mael Boland, Klaus Vilsmeier, Michael Riediker
We tested the nanomaterial release from composites during two different mechanical treatment processes, automated drilling and manual sawing. Polyurethane (PU) polymer discs (1-cm thickness and 11-cm diameter) were created using different nanomaterial fillers: multiwall carbon nanotubes (MWCNT), carbon black (CB), silicon dioxide (SiO2), and an unfilled PU control. Drilling generated far more submicron range particles than sawing. In the drilling experiments, none of the tested nanofillers showed a significant influence on particle number concentrations or sizes, except for the PU/MWCNT samples, from which larger particles were released than from control samples...
November 10, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/29135893/inhibition-of-skin-wound-contraction-by-nanofibrillar-cellulose-hydrogel
#20
Kristo Nuutila, Antti Laukkanen, Andrew Lindford, Susanna Juteau, Markus Nuopponen, Jyrki Vuola, Esko Kankuri
BACKGROUND: Although wound contraction is an essential part of healing, excessive contraction can compromise healing through induction of scarring and fibrosis. This in turn leads to development of wound contractures that limit elasticity and function. Major research efforts have focused on development of novel therapeutic approaches to gain inhibitory control over wound contraction. Despite these efforts, the need for cost-effective, clinically feasible and effective agents to inhibit wound contraction remains...
November 8, 2017: Plastic and Reconstructive Surgery
keyword
keyword
112810
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"