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https://www.readbyqxmd.com/read/28434710/shifting-the-paradigm-in-gas-chromatography-mass-spectrometry-pesticide-analysis-using-high-resolution-accurate-mass-spectrometry
#1
S Uclés, A Uclés, A Lozano, M J Martínez Bueno, A R Fernández-Alba
In the last 10 years, the majority of the pesticide food control laboratories moved from GC-MS to GC-MS/MS as the preferred analytical technique to address GC amenable compounds. The main reason for this change was the negative impact on the single stage GC-MS analysis caused by the interference from coeluting matrix compounds. The new development of gas chromatography coupled to high resolution accurate mass spectrometry (GC-HRAMS) provides opportunities to overcome such matrix interferences as a result of its much higher selectivity; allowing laboratories to carry out full-scan analysis covering the most exigent analytical performance criteria...
April 14, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28424849/ultrasound-evaluation-of-the-ulnar-collateral-ligament-of-the-elbow-which-method-is-most-reproducible
#2
Mehool Shukla, Robert Keller, Nathan Marshall, Hafeez Ahmed, Courtney Scher, Vasilios Bill Moutzouros, Marnix van Holsbeeck
INTRODUCTION: The ulnar collateral ligament (UCL) is an important medial stabilizer of the elbow, particularly in overhead-throwing athletes. However, there is no universally accepted method for evaluating UCL thickness with ultrasound (US). OBJECTIVE: To assess reproducibility of previously published methods, as well as a modified technique, for evaluating the UCL via US. We hypothesize that a modified technique would show greater reproducibility. MATERIAL AND METHODS: Using US, the thickness of the UCL in 50 volunteers was measured by two musculoskeletal trained radiologists using two different measurement techniques...
April 20, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28423800/project-peach-at-uclh-student-projects-in-healthcare-computing
#3
Navin Ramachandran, Dean Mohamedally, Paul Taylor
A collaboration between clinicians at UCLH and the Dept of Computer Science at UCL is giving students of computer science the opportunity to undertake real healthcare computing projects as part of their education. This is enabling the creation of a significant research computing platform within the Trust, based on open source components and hosted in the cloud, while providing a large group of students with experience of the specific challenges of health IT.
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28419258/eigenthreader-analogous-protein-fold-recognition-by-efficient-contact-map-threading
#4
Daniel Wa Buchan, David T Jones
Motivation: Protein fold recognition when appropriate, evolutionarily-related, structural templates can be identified is often trivial and may even be viewed as a solved problem. However in cases where no homologous structural templates can be detected, fold recognition is a notoriously difficult problem (Moult, Fidelis et al. 2014). Here we present EigenTHREADER, a novel fold recognition method capable of identifying folds where no homologous structures can be identified. EigenTHREADER takes a query amino acid sequence, generates a map of intra-residue contacts, and then searches a library of contact maps of known structures...
April 13, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28415493/multifunctional-baybf5-gd-er-upconversion-nanoparticles-for-in-vivo-tri-modal-upconversion-optical-x-ray-computed-tomography-and-magnetic-resonance-imaging
#5
Xiaolong Li, Zhigao Yi, Zhenluan Xue, Songjun Zeng, Hongrong Liu
Development of high-quality upconversion nanoparticles (UCNPs) with combination of the merits of multiple molecular imaging techniques, such as, upconversion luminescence (UCL) imaging, X-ray computed tomography (CT), and magnetic resonance (MR) imaging, could significantly improve the accuracy of biological diagnosis. In this work, multifunctional BaYbF5: Gd/Er (50:2mol%) UCNPs were synthesized via a solvothermal method using oleic acid (OA) as surface ligands (denoted as OA-UCNPs). The OA-UCNPs were further treated by diluted HCl to form ligand-free UCNPs (LF-UCNPs) for later bioimaging applications...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28409916/surfactant-free-aqueous-synthesis-of-novel-ba2gdf7-yb-3-er-3-peg-upconversion-nanoparticles-for-in-vivo-trimodality-imaging
#6
Yang Feng, Hongda Chen, Lina Ma, Baiqi Shao, Shuang Zhao, Zhenxin Wang, Hongpeng You
In this work, we developed the surfactant-free aqueous synthesis of novel polyethylene glycol (PEG) coated Ba2GdF7:Yb(3+), Er(3+) upconversion nanoparticles (named as, Ba2GdF7:Yb(3+), Er(3+)@PEG UCNPs) for in vivo multimodality imaging including upconversion luminescence (UCL), X-ray computed tomography (CT), and T1-weighted magnetic resonance (MR). The as-prepared Ba2GdF7:Yb(3+), Er(3+)@PEG UCNPs not only present bright UCL and reasonably high CT/MR enhancements but also exhibit excellent colloidal stability, inappreciable cytotoxicity, and negligible organ toxicity...
April 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28398820/magnetic-resonance-imaging-predictors-of-failure-in-the-nonoperative-management-of-ulnar-collateral-ligament-injuries-in-professional-baseball-pitchers
#7
Salvatore J Frangiamore, T Sean Lynch, Michael D Vaughn, Lonnie Soloff, Michael Forney, Joseph F Styron, Mark S Schickendantz
BACKGROUND: A medial ulnar collateral ligament (UCL) injury of the elbow is an increasingly common injury in professional baseball pitchers. Predictors of success and failure are not well defined for the nonoperative management of these injuries. PURPOSE: To evaluate the efficacy of objective measures to predict failure of the nonoperative management of UCL injuries. STUDY DESIGN: Case-control study; Level of evidence, 3. METHODS: Thirty-two professional pitchers (82%) met inclusion criteria and underwent an initial trial of nonoperative treatment for UCL tears based on clinical and radiological findings...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28394713/elbow-mri-findings-do-not-correlate-with-future-placement-on-the-disabled-list-in-asymptomatic-professional-baseball-pitchers
#8
Nicholas M Gutierrez, Christopher Granville, Lee Kaplan, Michael Baraga, Jean Jose
BACKGROUND: Injury rates among professional baseball players may reach as high as 5.8 per 1000 encounters, with pitchers being most vulnerable on account of the excessive biomechanical load on the upper extremity during the throwing motion. Anatomically, the shoulder is the most common site of pitching-related injury, accounting for 30.7% of injuries, closely followed by the elbow at 26.3%. Characteristic valgus loading imparts a predictable constellation of stresses on the joint, including medial tension, lateral compression, and posterior medial shearing...
April 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28381344/stability-of-coping-and-the-role-of-self-efficacy-in-the-first-year-following-mild-traumatic-brain-injury
#9
Myrthe E Scheenen, Harm J van der Horn, Myrthe E de Koning, Joukje van der Naalt, Jacoba M Spikman
BACKGROUND AND AIMS: Coping, the psychological adaptation to stressors and serious life events, has been found to have a great influence on the development and persistence of posttraumatic complaints. Coping has received much attention for having been found to be modifiable in treatment following mild traumatic brain injury (mTBI) and for its potential to identify the Patients who are at risk of suffering from long-term complaints. Currently, coping styles are assumed to be stable over time...
May 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28370594/ultrafast-synthesis-of-novel-hexagonal-phase-nabif4-upconversion-nanoparticles-at-room-temperature
#10
Pengpeng Lei, Ran An, Shuang Yao, Qishun Wang, Lile Dong, Xia Xu, Kaimin Du, Jing Feng, Hongjie Zhang
Upconversion (UC) nanoparticles (UCNPs) have evoked considerable attention in many fields owing to their fascinating features. However, rigorous synthesis conditions and expensive raw materials often limit their further applications. Here, a novel hexagonal phase NaBiF4 UC matrix through a very facile method (one min only at room temperature) is synthesized. The nanoparticles show good monodispersity with uniform size. Under the 980 nm irradiation, Yb(3+) /Ln(3+) (Ln = Er, Ho, Tm) codoped NaBiF4 nanoparticles show excellent UC luminescence (UCL)...
April 3, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28368021/flexible-transparent-displays-based-on-core-shell-upconversion-nanophosphor-incorporated-polymer-waveguides
#11
Bong Je Park, A-Ra Hong, Suntak Park, Ki-Uk Kyung, Kwangyeol Lee, Ho Seong Jang
Core/shell (C/S)-structured upconversion nanophosphor (UCNP)-incorporated polymer waveguide-based flexible transparent displays are demonstrated. Bright green- and blue-emitting Li(Gd,Y)F4:Yb,Er and Li(Gd,Y)F4:Yb,Tm UCNPs are synthesized via solution chemical route. Their upconversion luminescence (UCL) intensities are enhanced by the formation of C/S structure with LiYF4 shell. The Li(Gd,Y)F4:Yb,Er/LiYF4 and Li(Gd,Y)F4:Yb,Tm/LiYF4 C/S UCNPs exhibit 3.3 and 2.0 times higher UCL intensities than core counterparts, respectively...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28364630/charge-convertibility-and-near-infrared-photon-co-enhanced-cisplatin-chemotherapy-based-on-upconversion-nanoplatform
#12
Jiating Xu, Ye Kuang, Ruichan Lv, Piaoping Yang, Chunxia Li, Huiting Bi, Bin Liu, Dan Yang, Yunlu Dai, Shili Gai, Fei He, Bengang Xing, Jun Lin
Optimal nano-sized drug carrier requires long blood circulation, selective extravasation, and efficient cell uptake. Here we develop a charge-convertible nanoplatform based on Pt(IV) prodrug loaded NaYF4:Yb,Tm upconversion nanoparticles (UCNs), followed by coating a layer of PEG-PAH-DMMA polymer (UCNs-Pt(IV)@PEG-PAH-DMMA). The polymer endows the platform with high biocompatibility, initial nano-size for prolonged blood circulation and selective extravasation. Especially, the anionic polymer can response to the mild acidic stimulus (pH ∼6...
June 2017: Biomaterials
https://www.readbyqxmd.com/read/28343018/cus-as-a-gatekeeper-of-mesoporous-upconversion-nanoparticles-based-drug-controlled-release-system-for-tumor-targeted-multimodal-imaging-and-synergetic-chemo-thermotherapy
#13
Xiangjie Su, Feifei Zhao, Yuhui Wang, Xiaosa Yan, Shaona Jia, Bin Du
In this work, a tumor-targeted multifunctional mesoporous upconversion nanoparticle-based drug controlled release system was developed for UCL/MRI/PAT guided synergetic chemo-thermotherapy. Herein, the core-shell mesoporous upconversion nanoparticles served as drug carrier exhibiting higher upconversion luminescence emission intensity, with CuS as a gatekeeper through a cleavable disulfide bond under the influence of glutathione. CuS could not only prevent drug from early release during the delivery but also improve the delivery system function with the ability of photothermal therapy and photoacoustic tomography...
March 23, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28334266/phenopolis-an-open-platform-for-harmonization-and-analysis-of-genetic-and-phenotypic-data
#14
Nikolas Pontikos, Jing Yu, Ismail Moghul, Lucy Withington, Fiona Blanco-Kelly, Tom Vulliamy, Tsz Lun Wong, Cian Murphy, Valentina Cipriani, Alessia Fiorentino, Gavin Arno, Daniel Greene, Julius Ob Jacobsen, Tristan Clark, David S Gregory, Andrea Nemeth, Stephanie Halford, Chris F Inglehearn, Susan Downes, Graeme C Black, Andrew R Webster, Alison J Hardcastle, Vincent Plagnol
Summary: Phenopolis is an open-source web server providing an intuitive interface to genetic and phenotypic databases. It integrates analysis tools such as variant filtering and gene prioritisation based on phenotype. The Phenopolis platform will accelerate clinical diagnosis, gene discovery and encourage wider adoption of the Human Phenotype Ontology in the study of rare genetic diseases. Availability and Implementation: A demo of the website is available at https://phenopolis...
March 15, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28332669/multiple-imaging-and-excellent-anticancer-efficiency-of-an-upconverting-nanocarrier-mediated-by-single-near-infrared-light
#15
Yan Wang, Guixin Yang, Yanli Wang, Yanping Zhao, Haizhi Jiang, Yuyan Han, Piaoping Yang
It is difficult to meet the requirements of clinical diagnosis through a single imaging technique. Similarly, satisfactory therapy efficacy is also hard to achieve by a single therapeutic modality. It is therefore highly desirable and interesting to simultaneously achieve multimodal imaging and therapies in one single structure. In this study, we developed a core-shell-satellite NaGdF4:Yb,Er,Mn,Co@mSiO2-CuS structure using up-conversion luminescent (UCL) NaGdF4:Yb,Er,Mn,Co as the core, mesoporous silica as the layer, and the photoactive CuS nanoparticles as the satellites...
March 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28322153/recent-progress-in-808-nm-excited-upconversion-nanomaterials-as-multifunctional-nanoprobes-for-visualized-theranostics-in-cancers
#16
Leyong Zeng, Di Wu, Ying Tian, Yuanwei Pan, Aiguo Wu, Jinchao Zhang, Guangming Lu
Near-infrared (NIR) light responsive nanomaterials have attracted considerable attention due to their location in the biological window. Especially, lanthanide-doped nanomaterials exhibit unique upconversion luminescence (UCL) properties with low background interference and long luminescence lifetime, which makes them promising in imaging diagnosis of cancers. Compared with traditional upconversion nanomaterials excited by 980 nm laser, 808 nm excitation can overcome the disadvantages of high heating effect and weak penetration depth induced by excitation source...
March 20, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28320241/implementation-of-a-universal-cervical-length-screening-program-identifying-factors-associated-with-decline-rates
#17
Jeny Ghartey, Neda Ghaffari, Lisa D Levine, Nadav Schwartz, Celeste P Durnwald
PURPOSE: Cervical length (CL) measurement is now accepted as a screening strategy for identifying women at risk for preterm birth (PTB). However, patient acceptability may limit its implementation. Our objective was to identify characteristics associated with women who decline this screening. MATERIALS AND METHODS: This is a secondary analysis of a prospective cohort study of women offered UCL screening from January 2012-June 2012. Women with a singleton gestation 18 0/7-23 6/7 weeks at the time of anatomy scan were included...
March 20, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28320205/highly-emissive-dye-sensitized-upconversion-nanostructure-for-dual-photosensitizer-photodynamic-therapy-and-bioimaging
#18
Jiating Xu, Piaoping Yang, Mingdi Sun, Huiting Bi, Bin Liu, Dan Yang, Shili Gai, Fei He, Jun Lin
Rare-earth-based upconversion nanotechnology has recently shown great promise for photodynamic therapy (PDT). However, the NIR-induced PDT is greatly restricted by overheating issues on normal bodies and low yields of reactive oxygen species (ROS, (1)O2). Here, IR-808-sensitized upconversion nanoparticles (NaGdF4:Yb,Er@NaGdF4:Nd,Yb) were combined with mesoporous silica, which has Ce6 (red-light-excited photosensitizer) and MC540 (green-light-excited photosensitizer) loaded inside through covalent bond and electrostatic interaction, respectively...
April 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28314694/stress-ultrasound-in-baseball-players-with-ulnar-collateral-ligament-injuries-additional-value-for-predicting-rehabilitation-outcome
#19
Na Ra Kim, Sung Gyu Moon, Jin-Young Park, Jin Woo Choi, Kyung-Soo Oh
BACKGROUND: The purpose of this study was to evaluate the additional value of stress ultrasound (US) for predicting rehabilitation outcome in baseball players with ulnar collateral ligament (UCL) injury. METHODS: Stress US and magnetic resonance imaging (MRI) in 41 baseball players with UCL injury who received rehabilitation treatment for more than 6 weeks were retrospectively compared between the rehabilitation group (n = 23) and surgery group (n = 18)...
March 14, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28292199/high-resolution-mri-of-the-ulnar-and-radial-collateral-ligaments-of-the-wrist
#20
Taiki Nozaki, Wei Der Wu, Yasuhito Kaneko, Gregory Rafijah, Lily Yang, Dave Hitt, Hiroshi Yoshioka
Background Accurate diagnosis of injuries to the collateral ligaments of the wrist is technically challenging on MRI. Purpose To investigate usefulness of high-resolution two-dimensional (2D) and isotropic three-dimensional (3D) magnetic resonance imaging (MRI) for identifying and classifying the morphology of the ulnar and radial collateral ligaments (UCL and RCL) of the wrist. Material and Methods Thirty-seven participants were evaluated using 3T coronal 2D and isotropic 3D images by two radiologists independently...
January 1, 2017: Acta Radiologica
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