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https://www.readbyqxmd.com/read/28735526/the-biocompatibility-of-bone-cements-progress-in-methodological-approach
#1
Carlo Dall'Oca, Tommaso Maluta, Gian Mario Micheloni, Matteo Cengarle, Giampaolo Morbioli, Paolo Bernardi, Andrea Sbarbati, Daniele Degl'Innocenti, Franco Lavini, Bruno Magnan
The ideal bone graft substitute should have certain properties and there are many studies dealing with mixture of polymethylmetacrilate (PMMA) and β-tricalciumphospate (β-TCP) presenting the best characteristics of both. Scanning Electron Microscopy (SEM), for ultra-structural data, resulted a very reliable in vivo model to better understand the bioactivity of a cement and to properly evaluate its suitability for a particular purpose. The present study aims to further improve the knowledge on osteointegration development, using both parameters obtained with the Environmental Scanning Electron Microscopy (ESEM) and focused histological examination...
May 4, 2017: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/28735190/surface-complexation-modeling-of-calcite-zeta-potential-measurements-in-brines-with-mixed-potential-determining-ions-ca-2-co3-2-mg-2-so4-2-for-characterizing-carbonate-wettability
#2
Jin Song, Yongchao Zeng, Le Wang, Xindi Duan, Maura Puerto, Walter G Chapman, Sibani L Biswal, George J Hirasaki
This study presents experiment and surface complexation modeling (SCM) of synthetic calcite zeta potential in brine with mixed potential determining ions (PDI) under various CO2 partial pressures. Such SCM, based on systematic zeta potential measurement in mixed brines (Mg(2+), SO4(2-), Ca(2+) and CO3(2-)), is currently not available in the literature and is expected to facilitate understanding of the role of electrostatic forces in calcite wettability alteration. We first use a double layer SCM to model experimental zeta potential measurements and then systematically analyze the contribution of charged surface species...
July 11, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28735135/endoscope-assisted-abscess-drainage-secondary-to-endoscope-assisted-tlif-1-year-follow-up
#3
Karthik Madhavan, Steven Shelby Burks, Lee Onn Chieng, Anand Veeravagu, Michael Y Wang
INTRODUCTION: Endoscopic discectomy and fusions have been gaining popularity in the recent past and are noted to be safe for its application in elderly population. It involves ultra-small incision for discectomy followed by placement of percutaneous screws in awake patients. Treatment of advanced spinal pathology using endoscope-assisted techniques are challenging. Although not common with endoscopic approach, post-operative infection can be problematic as there are no established guidelines on its management...
July 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28734962/analyzing-the-hepatoprotective-effect-of-the-swertia-cincta-burkillextract-against-anit-induced-cholestasis-in-rats-by-modulating-the-expression-of-transporters-and-metabolic-enzymes
#4
Lili Xu, Tingting Sheng, Xiaolong Liu, Tong Zhang, Zhengtao Wang, Han Han
ETHNOPHARMACOLOGICAL RELEVANCE: Swertia cincta Burkill was traditionally used for treating jaundice and various types of chronic and acute hepatitis in Yunnan and Tibet in China for hundreds of years. This study aims to investigate the protective effect of S. cincta Burkill (ESC) extract on alpha-naphthylisothiocyanate (ANIT)-induced hepatotoxicity and cholestasis in rats. MATERIALS AND METHODS: Crude extracts were prepared using 90% ethanol and by vacuum drying...
July 19, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28734908/why-transition-risk-to-psychosis-is-not-declining-at-the-oasis-ultra-high-risk-service-the-hidden-role-of-stable-pretest-risk-enrichment
#5
P Fusar-Poli, E Palombini, C Davies, D Oliver, I Bonoldi, V Ramella-Cravaro, P McGuire
BACKGROUND: The reason for declining risk to psychosis across individuals assessed and meeting Ultra High Risk (UHR) criteria is still unclear. No studies have investigated the potential substantial role of the underlying risk enrichment across all the individuals undergoing an UHR assessment. METHODS: Cohort study including all non-psychotic subjects who were assessed on suspicion of psychosis risk by the OASIS UHR service in the period 2001 to 2015. Posttest (after UHR assessment) and pretest risk (before UHR assessment) of psychosis were stratified and compared across three time periods (2001-2005, 2006-2010, 2011-2015) with Cox analysis and modulating factors were investigated...
July 19, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28734877/enzymatic-and-free-radical-formation-of-cis-and-trans-epoxyeicosatrienoic-acids-in-vitro-and-in-vivo
#6
Theresa Aliwarga, Brianne S Raccor, Rozenn N Lemaitre, Nona Sotoodehnia, Sina A Gharib, Libin Xu, Rheem A Totah
Epoxyeicosatrienoic acids (EETs) are metabolites of arachidonic acid (AA) oxidation that have important cardioprotective and signaling properties. AA is an ω -6 polyunsaturated fatty acid (PUFA) that is prone to autoxidation. Although hydroperoxides and isoprostanes are major autoxidation products of AA, EETs are also formed from the largely overlooked peroxyl radical addition mechanism. While autoxidation yields both cis- and trans-EETs, cytochrome P450 (CYP) epoxygenases have been shown to exclusively catalyze the formation of all regioisomer cis-EETs, on each of the double bonds...
July 19, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28734348/ion-mobility-spectrometry-combined-with-ultra-performance-liquid-chromatography-mass-spectrometry-for-metabolic-phenotyping-of-urine-effects-of-column-length-gradient-duration-and-ion-mobility-spectrometry-on-metabolite-detection
#7
Paul D Rainville, Ian D Wilson, Jeremy K Nicholson, Giorgis Issacs, Lauren Mullin, James I Langridge, Robert S Plumb
The need for rapid and efficient high throughput metabolic phenotyping (metabotyping) in metabolomic/metabonomic studies often requires compromises to be made between analytical speed and metabolome coverage. Here the effect of column length (150, 75 and 30 mm) and gradient duration (15, 7.5 and 3 min respectively) on the number of features detected when untargeted metabolic profiling of human urine using reversed-phase gradient ultra performance chromatography with, and without, ion mobility spectrometry, has been examined...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28734044/metabolomic-analysis-reveals-the-composition-differences-in-13-chinese-tea-cultivars-of-different-manufacturing-suitabilities
#8
Pengliang Li, Weidong Dai, Meiling Lu, Dongchao Xie, Junfeng Tan, Chen Yang, Yin Zhu, Haipeng Lv, Qunhua Peng, Yue Zhang, Li Guo, Dejiang Ni, Zhi Lin
BACKGROUND: Green tea and black tea are manufactured using appropriate tea cultivars in China. However, the metabolite differences relating to the manufacturing suitability of tea cultivars are unclear. In this study, we performed a non-targeted metabolomic analysis on 13 Chinese tea cultivars using ultra-high performance liquid chromatography coupled with quadrupole-time-of-flight mass spectrometry (UHPLC-Q-TOF/MS) to investigate comprehensively the metabolite differences between cultivars suitable for manufacturing green tea (GT cultivars) and cultivars suitable for manufacturing both green tea and black tea (G&BT cultivars)...
July 22, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28733956/amyloid-beta-and-tau-as-alzheimer-s-disease-blood-biomarkers-promise-from-new-technologies
#9
REVIEW
Lih-Fen Lue, Andre Guerra, Douglas G Walker
The utility of the levels of amyloid beta (Aβ) peptide and tau in blood for diagnosis, drug development, and assessment of clinical trials for Alzheimer's disease (AD) has not been established. The lack of availability of ultra-sensitive assays is one critical issue that has impeded progress. The levels of Aβ species and tau in plasma and serum are much lower than levels in cerebrospinal fluid. Furthermore, plasma or serum contain high levels of assay-interfering factors, resulting in difficulties in the commonly used singulex or multiplex ELISA platforms...
July 2017: Neurology and Therapy
https://www.readbyqxmd.com/read/28733955/detection-of-plasma-biomarkers-using-immunomagnetic-reduction-a-promising-method-for-the-early-diagnosis-of-alzheimer-s-disease
#10
REVIEW
Shieh-Yueh Yang, Ming-Jang Chiu, Ta-Fu Chen, Herng-Er Horng
Alzheimer's disease (AD) is the most common form of dementia. The development of assay technologies able to diagnose early-stage AD is important. Blood tests to detect biomarkers, such as amyloid and total Tau protein, are among the most promising diagnostic methods due to their low cost, low risk, and ease of operation. However, such biomarkers in blood occur at extremely low levels and are difficult to detect precisely. In the early 2000s, a highly sensitive assay technology, immunomagnetic reduction (IMR), was developed...
July 2017: Neurology and Therapy
https://www.readbyqxmd.com/read/28733743/therapeutic-peroral-direct-cholangioscopy-using-a-single-balloon-enteroscope-in-patients-with-roux-en-y-anastomosis-with-videos
#11
Hiroshi Yamauchi, Mitsuhiro Kida, Kosuke Okuwaki, Shiro Miyazawa, Takaaki Matsumoto, Kazuho Uehara, Eiji Miyata, Rikiya Hasegawa, Toru Kaneko, Issaree Laopeamthong, Yang Lei, Tomohisa Iwai, Hiroshi Imaizumi, Wasaburo Koizumi
BACKGROUND: Peroral cholangioscopic lithotripsy is a useful procedure in patients with a normal gastrointestinal anatomy who have difficult-to-treat stones. We evaluated the usefulness of peroral direct cholangioscopy (PDCS) using single-balloon enteroscope (SBE) in patients with difficult-to-treat stones who had undergone Roux-en-Y reconstruction. METHODS: Among 118 patients (169 sessions) who underwent SBE-assisted endoscopic retrograde cholangiopancreatography to treat biliary stones after Roux-en-Y reconstruction, patients in whom it was difficult to remove biliary stones via a transpapillary or transanastomotic approach and difficult to switch to ultra-slim endoscope, were retrospectively enrolled...
July 21, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28733616/capturing-3d-water-flow-in-rooted-soil-by-ultra-fast-neutron-tomography
#12
Christian Tötzke, Nikolay Kardjilov, Ingo Manke, Sascha E Oswald
Water infiltration in soil is not only affected by the inherent heterogeneities of soil, but even more by the interaction with plant roots and their water uptake. Neutron tomography is a unique non-invasive 3D tool to visualize plant root systems together with the soil water distribution in situ. So far, acquisition times in the range of hours have been the major limitation for imaging 3D water dynamics. Implementing an alternative acquisition procedure we boosted the speed of acquisition capturing an entire tomogram within 10 s...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28733215/development-of-nanoluc-bridging-immunoassay-for-detection-of-anti-drug-antibodies
#13
Nidhi Nath, Rod Flemming, Becky Godat, Marjeta Urh
Anti-drug antibodies (ADAs) are generated in-vivo as an immune response to therapeutic antibody drugs and can significantly affect the efficacy and safety of the drugs. Hence, detection of ADAs is recommended by regulatory agencies during drug development process. A widely accepted method for measuring ADAs is "bridging" immunoassay and is frequently performed using enzyme-linked immunosorbent assay (ELISA) or electrochemiluminescence (ECL) platform developed by Meso Scale Discovery (MSD). ELISA is preferable due to widely available reagents and instruments and broad familiarity with the technology; however, MSD platform has gained wide acceptability due to a simpler workflow, higher sensitivity, and a broad dynamic range but requires proprietary reagents and instruments...
July 18, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28733008/highly-transparent-cerium-doped-gadolinium-gallium-aluminum-garnet-ceramic-prepared-with-precursors-fabricated-by-ultrasonic-enhanced-chemical-co-precipitation
#14
Ji-Yun Zhang, Zhao-Hua Luo, Hao-Chuan Jiang, Jun Jiang, Chun-Hua Chen, Jing-Xian Zhang, Zhen-Zhen Gui, Na Xiao
Cerium doped gadolinium gallium aluminum garnet (GGAG:Ce) ceramic precursors have been synthesized with an ultrasonic chemical co-precipitation method (UCC) and for comparison with a traditional chemical co-precipitation method (TCC). The effect of ultra-sonication on the morphology of powders and the transmittance of GGAG:Ce ceramics are studied. The results indicate that the UCC method can effectively improve the homogenization and sinterability of GGAG:Ce powders, which contribute to obtain high transparent GGAG ceramic with the highest transmittance of 81%...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732958/comparison-between-dispersive-solid-phase-and-dispersive-liquid-liquid-microextraction-combined-with-spectrophotometric-determination-of-malachite-green-in-water-samples-based-on-ultrasound-assisted-and-preconcentration-under-multi-variable-experimental-design
#15
Ebrahim Alipanahpour Dil, Mehrorang Ghaedi, Arash Asfaram, Fahimeh Zare, Fatemeh Mehrabi, Fardin Sadeghfar
The ultrasound-assisted dispersive solid-phase microextraction (USA-DSPME) and the ultrasound-assisted dispersive liquid-liquid microextraction (USA-DLLME) developed for as an ultra preconcentration and/or technique for the determination of malachite green (MG) in water samples. Central composite design based on analysis of variance and desirability function guide finding best operational conditions and represent dependency of response to variables viz. volume of extraction, eluent and disperser solvent, pH, adsorbent mass and ultrasonication time has significant influence on methods efficiency...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732927/ultrasound-promoted-dispersive-micro-solid-phase-extraction-of-trace-anti-hypertensive-drugs-from-biological-matrices-using-a-sonochemically-synthesized-conductive-polymer-nanocomposite
#16
Maryam Hemmati, Maryam Rajabi, Alireza Asghari
In this work, a rapid and efficient procedure named ultrasound meliorated dispersive micro solid-phase extraction followed by high performance liquid chromatography-ultra violet detection (US-D-μSPE-HPLC-UV) was developed for the pre-concentration of the main trace anti-hypertensive drugs in complex matrices. The basis of this procedure was a polypyrrole-sodium dodecylbenzenesulfonate/zinc oxide (PPy-DBSNa/ZnO) nanocomposite. It was readily synthesized by the impressive way of in situ sonochemical oxidative polymerization in the presence of some additives such as FeCl3 and DBSNa, ultimately leading to the effective coating of PPy on the ZnO nanoparticle cores...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732399/analysis-of-emerging-organic-contaminants-in-water-fish-and-suspended-particulate-matter-spm-in-the-joint-danube-survey-using-solid-phase-extraction-followed-by-uhplc-ms-ms-and-gc-ms-analysis
#17
Robert Loos, Simona Tavazzi, Giulio Mariani, Gert Suurkuusk, Bruno Paracchini, Gunther Umlauf
In the third Joint Danube Survey (JDS3), emerging organic contaminants were analysed in the dissolved water phase of samples from the Danube River and its major tributaries. Analyses were performed using solid-phase extraction (SPE) followed by ultra-high-pressure liquid chromatography triple-quadrupole mass spectrometry (UHPLC-MS-MS) and gas chromatography-mass spectrometry (GC-MS). The polar organic compounds analysed by UHPLC-MS-MS were 1H-benzotriazole, methylbenzotriazoles, carbamazepine, 10,11-dihydro-10,11-dihydroxy-carbamazepine, diclofenac, sulfamethox-azole, 2,4-D (2,4-dichlorophenoxyacetic acid), MCPA (2-methyl-4-chlorophenoxyacetic acid), metolachlor, cybutryne (irgarol), terbutryn, DEET (N,N-diethyl-m-toluamide), and several perfluoroalkyl acids (C6-C9; C8=perfluorooctanoic acid (PFOA)) and perfluorooctansulfonic acid (PFOS)...
July 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28731926/history-of-anaesthesia-the-ketamine-story-past-present-and-future
#18
Georges Mion
: Ketamine's history begins in the 1950s in Detroit, Michigan, at Parke-Davis Laboratories. On 26 March 1956, Harold V. Maddox synthesised phencyclidine or PCP. Domino studied PCP effects in animals and in 1958, Greifenstein made the first trials of PCP in humans under the name of Sernyl. Sernyl did not cause depression of cardiovascular and respiratory functions, but elicited severe excitation with a very prolonged postoperative recovery. Because of its psychedelic effects, it became a street drug under the name of 'angel dust' and was placed on schedule II of Federal Controlled Substance Act (CSA) in 1978...
July 20, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28731783/identification-of-sppl2a-inhibitors-by-multiparametric-analysis-of-a-high-content-ultra-high-throughput-screen
#19
Xian Zhang, Marjo Götte, Yvonne Ibig-Rehm, Ansgar Schuffenhauer, Marion Kamke, Dan Beisner, Danilo Guerini, Daniela Siebert, Ghislain M C Bonamy, Daniela Gabriel, Ursula Bodendorf
The intramembrane protease signal peptide peptidase-like 2a (SPPL2a) is a potential drug target for the treatment of autoimmune diseases due to an essential role in B cells and dendritic cells. To screen a library of 1.4 million compounds for inhibitors of SPPL2a, we developed an imaging assay detecting nuclear translocation of the proteolytically released cytosolic substrate fragment. The state-of-the-art hit calling approach based on nuclear translocation resulted in numerous false-positive hits, mainly interrupting intracellular protein trafficking...
July 1, 2017: SLAS Discovery
https://www.readbyqxmd.com/read/28731402/twenty-four-hour-emergency-intervention-versus-early-intervention-in-aneurysmal-subarachnoid-hemorrhage
#20
Joseph R Linzey, Craig Williamson, Venkatakrishna Rajajee, Kyle Sheehan, B Gregory Thompson, Aditya S Pandey
OBJECTIVE Recent observational data suggest that ultra-early treatment of ruptured aneurysms prevents rebleeding, thus improving clinical outcomes. However, advances in critical care management of patients with ruptured aneurysms may reduce the rate of rebleeding in comparison with earlier trials, such as the International Cooperative Study on the Timing of Aneurysm Surgery. The objective of the present study was to determine if an ultra-early aneurysm repair protocol will or will not significantly reduce the number of incidents of rebleeding following aneurysmal subarachnoid hemorrhage (SAH)...
July 21, 2017: Journal of Neurosurgery
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