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https://www.readbyqxmd.com/read/28324127/development-of-certified-reference-materials-for-electrolytes-in-human-serum-gbw09124-09126
#1
Liuxing Feng, Jun Wang, Yanjie Cui, Naijie Shi, Haifeng Li, Hongmei Li
Three reference materials, at relatively low, middle, and high concentrations, were developed for analysis of the mass fractions of electrolytes (K, Ca, Na, Mg, Cl, and Li) in human serum. The reference materials were prepared by adding high purity chloride salts to normal human serum. The concentration range of the three levels is within ±20% of normal human serum. It was shown that 14 units with duplicate analysis is enough to demonstrate the homogeneity of these candidate reference materials. The statistical results also showed no significant trends in both short-term stability test for 1 week at 40 °C and long-term stability test for 14 months...
March 21, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28318927/classical-versus-custom-orbital-wall-reconstruction-selected-factors-regarding-surgery-and-hospitalization
#2
Rafał Zieliński, Marta Malińska, Marcin Kozakiewicz
PURPOSE: Nowadays, in orbital wall reconstruction, maxillofacial surgeons have the possibility to treat patients in modern ways such as with individual implants. Nevertheless, conventional treatment including standard titanium mesh shaped during the surgical procedure is also widely used. The aim of this study was to compare the above methods of orbital wall reconstructions. MATERIALS AND METHODS: In the first group (39 cases), patients were treated by means of computer-aided design/computer-aided manufacturing (CAD/CAM) milled individual implants made of ultra-high-molecular-weight polyethylene, dioxide zirconium and rapid prototyping titanium mesh pre-bent on an ABS model made by a three-dimensional (3D) printer...
February 17, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28318437/case-240-meckel-diverticulitis
#3
R Ashley Milam, Ricardo B Fonseca
History A previously healthy 28-year-old man developed right lower quadrant pain while traveling. The pain progressed over the course of 2-3 days, and his family took him to a local emergency department. He was found to have an elevated white blood cell count of 12.2 × 10(9)/L (reference range, [3.9-10.3] × 10(9)/L), with a predominance of neutrophils. Contrast material-enhanced computed tomography (CT) of the abdomen and pelvis was performed, and findings were abnormal. The patient elected to leave the emergency department without undergoing treatment, and he returned home via airplane...
April 2017: Radiology
https://www.readbyqxmd.com/read/28317714/acetic-acid-pretreatment-improves-the-hardness-of-cooked-potato-slices
#4
Wenlin Zhao, Hussain Shehzad, Shoulei Yan, Jie Li, Qingzhang Wang
The effects of acetic acid pretreatment on the texture of cooked potato slices were investigated in this work. Potato slices were pretreated with acetic acid immersion (AAI), distilled water immersion (DWI), or no immersion (NI). Subsequently, the cell wall material of the pretreated samples was isolated and fractioned to evaluate changes in the monosaccharide content and molar mass (MM), and the hardness and microscopic structure of the potato slices in different pretreatments before and after cooking were determined...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28317122/an-anthropomorphic-abdominal-phantom-for-deformable-image-registration-accuracy-validation-in-adaptive-radiation-therapy
#5
Yuliang Liao, Linjing Wang, Xiangdong Xu, Haibin Chen, Jiawei Chen, Guoqian Zhang, Huaiyu Lei, Ruihao Wang, Shuxu Zhang, Xuejun Gu, Xin Zhen, Linghong Zhou
PURPOSE: To design and construct a three-dimensional (3D) anthropomorphic abdominal phantom for geometric accuracy and dose summation accuracy evaluations of deformable image registration (DIR) algorithms for adaptive radiation therapy (ART). METHOD: Organ molds, including liver, kidney, spleen, stomach, vertebra and two metastasis tumors, were 3D printed using contours from an ovarian cancer patient. The organ molds were molded with deformable gels made of different mixtures of polyvinyl chloride (PVC) and the softener dioctyl terephthalate...
March 20, 2017: Medical Physics
https://www.readbyqxmd.com/read/28315873/clear-lens-extraction-for-early-angle-closure-glaucoma-revolution-or-overtreatment
#6
Ke Shi, Zhipeng You, Changyun Wang
<br><br>To discuss the EAGLE study initiated by Dr. Azuara - Blanco which is published in The Lancet to investigate whether clear-lens extraction(CLE) could be a useful initial treatment.<br><br>Materials (Subjects) and Methods<br><br>Guideline and textbook reference<br><br>Results: <br><br>This conclusion has challenged European guidelines for glaucoma, in which indicated that peripheral iridectomy can deepen anterior chamber(AC) angle of primary angle closure combined with plateau iris...
March 16, 2017: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/28315002/determination-of-platinum-group-elements-in-particulate-matter-by-inductively-coupled-plasma-mass-spectrometry
#7
Jasmina Rinkovec, Gordana Pehnec, Silva Žužul, Sanda Rončević
This study examined a method for determination of rhodium (Rh), palladium (Pd) and platinum (Pt) in particulate matter using standard solutions, model samples and certified reference materials (NIST 1648a and ERM CZ120). The method was based on microwave digestion followed by inductively coupled plasma mass spectrometry (ICP-MS). The results showed that the stability of the standard solution mixture of Rh, Pd and Pt was better when chlorides were present in the solution. A membrane filter and one type of quartz filter were the most adequate for analyzing platinum group elements (PGE)...
March 17, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28314506/advancements-in-norm-metrology-results-and-impact-of-the-european-joint-research-project-metronorm
#8
Franz Josef Maringer, Andreas Baumgartner, Francesco Cardellini, Philippe Cassette, Teresa Crespo, Julian Dean, Hannah Wiedner, Jiři Hůlka, Mikael Hult, Simon Jerome, Franz Kabrt, Petr Kovář, Cyrus Larijani, Guillaume Lutter, Maria Marouli, Alexander Mauring, Monika Mazánová, Bogusław Michalik, Nathalie Michielsen, Virginia Peyres, Sylvie Pierre, Roy Pöllänen, Stefaan Pommé, Mário Reis, Michael Stietka, László Szücs, Branko Vodenik
The results of the three years European Metrology Research Programme's (EMRP) joint research project 'Metrology for processing materials with high natural radioactivity' (MetroNORM) are presented. In this project, metrologically sound novel instruments and procedures for laboratory and in-situ NORM activity measurements have been developed. Additionally, standard reference materials and sources for traceable calibration and improved decay data of natural radionuclides have been established.
March 8, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28314391/trace-determination-of-perfluorooctane-sulfonate-and-perfluorooctanoic-acid-in-environmental-samples-surface-water-wastewater-biota-sediments-and-sewage-sludge-using-liquid-chromatography-orbitrap-mass-spectrometry
#9
D Zacs, V Bartkevics
An analytical method was established and validated for the analysis of the most frequently monitored representatives among the group of perfluorinated compounds (PFAS), namely, perfluorooctanoic acid (PFOA) and prefluorooctane sulfonate (PFOS) in environmental samples (surface water, wastewater, sediments, sewage sludge, and biota). High performance liquid chromatography (HPLC) coupled to Orbitrap mass spectrometry (Orbitrap-MS) employing a heated electrospray ionization (HESI) interface operated in negative mode was used for the quantitative determination of these contaminants...
November 18, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28306349/utility-of-critical-items-within-the-recognition-memory-test-and-word-choice-test
#10
Laszlo A Erdodi, Bradley T Tyson, Christopher A Abeare, Brandon G Zuccato, Jaspreet K Rai, Kristian R Seke, Sanya Sagar, Robert M Roth
This study was designed to examine the clinical utility of critical items within the Recognition Memory Test (RMT) and the Word Choice Test (WCT). Archival data were collected from a mixed clinical sample of 202 patients clinically referred for neuropsychological testing (54.5% male; mean age = 45.3 years; mean level of education = 13.9 years). The credibility of a given response set was psychometrically defined using three separate composite measures, each of which was based on multiple independent performance validity indicators...
March 17, 2017: Applied Neuropsychology. Adult
https://www.readbyqxmd.com/read/28303787/screening-natural-content-of-water-soluble-b-vitamins-in-fish-enzymatic-extraction-hilic-separation-and-tandem-mass-spectrometric-determination
#11
Niladri Sekhar Chatterjee, K Ashok Kumar, K K Ajeeshkumar, K R Remya Kumari, K V Vishnu, Rangasamy Anandan, Suseela Mathew, C N Ravishankar
Despite the potential of LC with tandem MS (MS/MS) in improving sensitivity and selectivity, analytical methods are scarce for the determination of protein-bound and phosphorylated forms of B vitamins in food. This prompted us to develop a method for LC-MS/MS determination of naturally occurring nicotinamide, nicotinic acid, thiamine, pyridoxine, riboflavin, pantothenic acid, biotin, folic acid, and cyanocobalamin in fish. Baseline separation of the vitamins was achieved in a hydrophilic interaction LC condition...
March 16, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28303723/decellularised-material-as-scaffolds-for-tissue-engineering-studies-in-long-gap-oesophageal-atresia
#12
Esmond Lee, Anna Milan, Luca Urbani, Paolo De Coppi, Mark W Lowdell
Oesophageal atresia refers to an anomaly in foetal development in which the oesophagus terminates in a blind end. Whilst surgical correction is achievable in most patients, when a long gap is present it still represents a major challenge associated with higher morbidity and mortality. In this context, tissue engineering could represent a successful alternative to restore oesophageal function and structure. Naturally derived biomaterials made of decellularised tissues retain native extracellular matrix architecture and composition, providing a suitable bed for the anchorage and growth of relevant cell types...
March 17, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/28303072/achievements-and-future-directions-of-the-apfcb-mass-spectrometry-harmonisation-project-on-serum-testosterone
#13
REVIEW
Ronda F Greaves, Chung S Ho, Kirsten E Hoad, John Joseph, Brett McWhinney, Janice P Gill, Therese Koal, Chris Fouracre, Heidi P Iu, Brian R Cooke, Conchita Boyder, Hai T Pham, Lisa M Jolly
As an outcome of the 2010 Asian Pacific Conference for Chromatography and Mass Spectrometry in Hong Kong, a collaborative working group was formed to promote the harmonisation of mass spectrometry methods. The Mass Spectrometry Harmonisation Working Group resides under the combined auspices of the Asia-Pacific Federation for Clinical Biochemistry and Laboratory Medicine (APFCB) and the Australasian Association of Clinical Biochemists (AACB). A decision was made to initially focus attention on serum steroids due to the common interest of members in this area; with the first steroid to assess being testosterone...
May 2016: Clinical Biochemist. Reviews
https://www.readbyqxmd.com/read/28302987/development-of-a-certified-reference-material-nmij-crm-7203-a-for-elemental-analysis-of-tap-water
#14
Yanbei Zhu, Tomohiro Narukawa, Kazumi Inagaki, Shin-Ichi Miyashita, Takayoshi Kuroiwa, Tomoko Ariga, Izumi Kudo, Masae Koguchi, Sung Woo Heo, Jung Ki Suh, Kyoung-Seok Lee, Yong-Hyeon Yim, Youngran Lim
A certified reference material (CRM), NMIJ CRM 7203-a, was developed for the elemental analysis of tap water. At least two independent analytical methods were applied to characterize the certified value of each element. The elements certified in the present CRM were as follows: Al, As, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, Pb, Rb, Sb, Se, Sr, and Zn. The certified value for each element was given as the (property value ± expanded uncertainty), with a coverage factor of 2 for the expanded uncertainty...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28301779/detection-of-bone-marrow-edema-in-nondisplaced-hip-fractures-utility-of-a-virtual-unenhanced-dual-energy-ct-application
#15
Trenton T Kellock, Savvas Nicolaou, Sandra S Y Kim, Sultan Al-Busaidi, Luck J Louis, Tim W O'Connell, Hugue A Ouellette, Patrick D McLaughlin
Purpose To quantify the sensitivity and specificity of dual-energy computed tomographic (CT) virtual noncalcium images in the detection of nondisplaced hip fractures and to assess whether obtaining these images as a complement to bone reconstructions alters sensitivity, specificity, or diagnostic confidence. Materials and Methods The clinical research ethics board approved chart review, and the requirement to obtain informed consent was waived. The authors retrospectively identified 118 patients who presented to a level 1 trauma center emergency department and who underwent dual-energy CT for suspicion of a nondisplaced traumatic hip fracture...
March 16, 2017: Radiology
https://www.readbyqxmd.com/read/28301309/value-of-dynamic-contrast-enhanced-and-diffusion-weighted-mr-imaging-in-the-detection-of-pathologic-complete-response-in-cervical-cancer-after-neoadjuvant-therapy-a-retrospective-observational-study
#16
Aurélie Jalaguier-Coudray, Rim Villard-Mahjoub, Aurélie Delouche, Béatrice Delarbre, Eric Lambaudie, Gilles Houvenaeghel, Mathieu Minsat, Agnès Tallet, Renaud Sabatier, Isabelle Thomassin-Naggara
Purpose To evaluate the association between dynamic contrast material-enhanced (DCE) and diffusion-weighted (DW) magnetic resonance (MR) imaging with pathologic complete response after preoperative combined chemotherapy and radiation therapy for cervical carcinoma and evaluate the risk of local recurrence. Materials and Methods The institutional ethics committee approved the study and waived the requirement to obtain informed consent. The study comprised 52 patients with locally advanced carcinoma, treated first with combined chemotherapy and radiation therapy, who underwent MR imaging before final surgery between June 2011 and July 2015...
March 14, 2017: Radiology
https://www.readbyqxmd.com/read/28300544/pre-analytical-and-analytical-aspects-affecting-clinical-reliability-of-plasma-glucose-results
#17
REVIEW
Sara Pasqualetti, Federica Braga, Mauro Panteghini
The measurement of plasma glucose (PG) plays a central role in recognizing disturbances in carbohydrate metabolism, with established decision limits that are globally accepted. This requires that PG results are reliable and unequivocally valid no matter where they are obtained. To control the pre-analytical variability of PG and prevent in vitro glycolysis, the use of citrate as rapidly effective glycolysis inhibitor has been proposed. However, the commercial availability of several tubes with studies showing different performance has created confusion among users...
March 11, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28299418/expanding-the-knowledge-on-dried-blood-spots-and-lc-ms-based-protein-analysis-two-different-sampling-materials-and-six-protein-targets
#18
Cecilie Rosting, Astrid Gjelstad, Trine Grønhaug Halvorsen
The combination of dried blood spots (DBS) and bottom-up LC-MS-based protein analysis was investigated in the present paper using six model proteins (1 mg/mL of each protein) with different physicochemical properties. Two different materials for DBS were examined: a water-soluble DBS material (carboxymethyl cellulose, (CMC)) and a commercially available (non-soluble) material (DMPK-C). The sample preparation was optimised regarding the water-soluble material and achieving acceptable repeatability of the signal was emphasised...
March 15, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28299416/multicomponent-quantitative-spectroscopic-analysis-without-reference-substances-based-on-ica-modelling
#19
Yulia B Monakhova, Svetlana P Mushtakova
A fast and reliable spectroscopic method for multicomponent quantitative analysis of targeted compounds with overlapping signals in complex mixtures has been established. The innovative analytical approach is based on the preliminary chemometric extraction of qualitative and quantitative information from UV-vis and IR spectral profiles of a calibration system using independent component analysis (ICA). Using this quantitative model and ICA resolution results of spectral profiling of "unknown" model mixtures, the absolute analyte concentrations in multicomponent mixtures and authentic samples were then calculated without reference solutions...
March 15, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28298154/advanced-characterisation-of-encapsulated-lipid-powders-regarding-microstructure-by-time-domain-nuclear-magnetic-resonance
#20
Annika Linke, Theresa Anzmann, Jochen Weiss, Reinhard Kohlus
Encapsulation is an established technique to protect sensitive materials from environmental stress. In order to understand the physical protection mechanism against oxidation, knowledge about the powder microstructure is required. Time domain-nuclear magnetic resonance (TD-NMR) has the potential to determine the surface oil (SO) and droplet size distribution by relaxation and restricted self-diffusion, respectively. The amount of SO, the retention and encapsulation efficiency are determined based on a lipid balance...
March 15, 2017: Journal of Microencapsulation
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