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https://www.readbyqxmd.com/read/27745974/geochemical-characteristics-of-rare-earth-elements-in-the-surface-sediments-from-the-spratly-islands-of-china
#1
Jingxi Li, Chengjun Sun, Li Zheng, Xiaofei Yin, Junhui Chen, Fenghua Jiang
The geochemistry of rare earth elements (REE) in surface sediment from Cuarteron reef (N1), Johnson reef (N2), Hugh reef (N3), Gaven reef (N4), Fiery cross reef (N5), and Subi reef (N6) were firstly studied. The total REE abundance (∑REE) varied from 2.244μg·g(-1) to 21.661μg·g(-1), with an average of 4.667μg·g(-1). The LREE/HREE was from 2.747 to 9.869, with an average of 3.687, which indicated that the light REE was evidently enriched. Fractionation was observed between LREE and HREE. Gd with a negative anomaly was also detected in all of the stations...
October 13, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27725270/multifunctional-nanogels-with-dual-temperature-and-ph-responsiveness
#2
Loredana Elena Nita, Aurica P Chiriac, Alina Diaconu, Nita Tudorachi, Liliana Mititelu-Tartau
Over the last 10 years, the development of intelligent biomaterials for medical and pharmaceutical applications has attracted growing interest by combining interdisciplinary efforts. Between them nanogels represent one of the most attractive carriers for innovative drug delivery systems. In the present investigation new variants of multi-responsive nanogels have been synthesized by crosslinking poly(itaconic anhydride-co-3,9-divinyl-2,4,8,10-tetraoxaspiro [5.5] undecane) copolymer (having different molar ratios between comonomers) with 1,12-dodecandiol...
October 8, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27646575/membranous-nephropathy-in-the-kidney-allograft
#3
REVIEW
Edward J Filippone, John L Farber
Membranous nephropathy (MN) may occur in a kidney transplant as recurrence of the original disease (rMN) or as a de novo MN (dnMN). rMN often occurs early, within the first year, and often in a mild or subclinical fashion. Recurrence cannot be predicted by clinical features at the time of transplantation. The natural history is increasing proteinuria over time, with less chance for spontaneous remission compared to primary MN (pMN). Antiphospholipase A2 receptor (PLA2R) antibodies should be evaluated in all patients with pMN at the time of transplantation and serially...
November 2016: Clinical Transplantation
https://www.readbyqxmd.com/read/27314679/comparison-of-remote-magnetic-navigation-ablation-and-manual-ablation-of-idiopathic-ventricular-arrhythmia-after-failed-manual-ablation
#4
Mitsuharu Kawamura, Melvin M Scheinman, Zian H Tseng, Byron K Lee, Gregory M Marcus, Nitish Badhwar
PURPOSE: Catheter ablation for idiopathic ventricular arrhythmia (VA) is effective and safe, but efficacy is frequently limited due to an epicardial origin and difficult anatomy. The remote magnetic navigation (RMN) catheter has a flexible catheter design allowing access to difficult anatomy. We describe the efficacy of the RMN for ablation of idiopathic VA after failed manual ablation. METHODS: Among 235 patients with idiopathic VA referred for catheter ablation, we identified 51 patients who were referred for repeat ablation after a failed manual ablation...
June 17, 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/27311989/semi-automatic-measuring-of-arteriovenous-relation-as-a-possible-silent-brain-infarction-risk-index-in-hypertensive-patients
#5
X M Vázquez Dorrego, J M Manresa Domínguez, A Heras Tebar, R Forés, A Girona Marcé, M T Alzamora Sas, P Delgado Martínez, I Riba-Llena, J Ugarte Anduaga, A Beristain Iraola, I Barandiaran Martirena, S M Ruiz Bilbao, P Torán Monserrat
OBJECTIVE: To evaluate the usefulness of a semiautomatic measuring system of arteriovenous relation (RAV) from retinographic images of hypertensive patients in assessing their cardiovascular risk and silent brain ischemia (ICS) detection. METHODS: Semi-automatic measurement of arterial and venous width were performed with the aid of Imedos software and conventional fundus examination from the analysis of retinal images belonging to the 976 patients integrated in the cohort Investigating Silent Strokes in Hypertensives: a magnetic resonance imaging study (ISSYS), group of hypertensive patients...
June 13, 2016: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/27104324/arthroscopic-rotator-cuff-repair-with-or-without-prp-our-experience
#6
Paolo Di Benedetto, Enrico Daniele Di Benedetto, Alessandro Beltrame, Renato Gisonni, Vanni Cainero, Araldo Causero
BACKGROUND AND AIM OF THE WORK: Arthroscopical rotator cuff repair has good results, but the rate of tendon healing is 80% in small tears with a decrease to 30% in large and massive tears. Platelets are an endogenous source of growth factors present during rotator cuff healing. Aim of the work is checking if Cascade Autologous Platelet System may improve rotator cuff healing in small sovraspinatus tears. METHODS: Each patient enrolled in cases  has surgical arthroscopical repair of sovraspinatus  small tear and then treated with intraoperatory Cascade...
2016: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/26969224/a-comparison-of-remote-magnetic-irrigated-tip-ablation-versus-manual-catheter-irrigated-tip-catheter-ablation-with-and-without-force-sensing-feedback
#7
J Peter Weiss, Heidi T May, Tami L Bair, Brian G Crandall, Michael J Cutler, John D Day, Jeffrey S Osborn, Charles Mallender, T Jared Bunch
BACKGROUND: Remote magnetic navigation (RMN) and contact force (CF) sensing technologies have been utilized in an effort to improve safety and efficacy of catheter ablation. A comparative analysis of the relative short- and long-term outcomes of AF patients has not been performed. As such, we comparatively evaluated the safety and efficacy of these technologies. METHODS: A total of 627 patients who underwent catheter ablation with either a manual irrigated tip catheter: (312, 49...
March 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26969222/remote-magnetic-navigation-a-focus-on-catheter-ablation-of-ventricular-arrhythmias
#8
Philip Aagaard, Andrea Natale, David Briceno, Hiroshi Nakagawa, Sanghamitra Mohanty, Carola Gianni, J David Burkhardt, Luigi DI Biase
VT ablation is based on percutaneous catheter insertion under fluoroscopic guidance to selectively destroy (i.e., ablate) myocardial tissue regions responsible for the initiation or propagation of ventricular arrhythmias. Although the last decade has witnessed a rapid evolution of ablation equipment and techniques, the control over catheter movement during manual ablation has remained largely unchanged. Moreover, the procedures are long, and require ergonomically unfavorable positions, which can lead to operator fatigue...
March 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26969220/catheter-ablation-of-ischemic-ventricular-tachycardia-with-remote-magnetic-navigation-stop-vt-multicenter-trial
#9
Jan Skoda, Arash Arya, Fermin Garcia, Edward Gerstenfeld, Francis Marchlinski, Gerhard Hindricks, John Miller, Jan Petru, Lucie Sediva, Qun Sha, Marek Janotka, Milan Chovanec, Petr Waldauf, Petr Neuzil, Vivek Y Reddy
INTRODUCTION: Catheter ablation is an effective treatment of scar-related ventricular tachycardia (VT), but the overall complexity of the procedure has precluded its widespread use. Remote magnetic navigation (RMN) has been shown to facilitate cardiac mapping and ablation of VT in a retrospective series. STOP-VT is the first multicenter, prospective, single-arm and single-procedure study evaluating RMN-based mapping and ablation of post-infarction VT. METHODS: Patients with documented VT and prior MI, in whom an ICD was implanted either for primary or secondary prevention, were recruited from four EU and US centers...
March 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26969219/efficacy-and-safety-of-atrial-fibrillation-ablation-using-remote-magnetic-navigation-experience-from-1-006-procedures
#10
Q I Jin, Steen Pehrson, Peter Karl Jacobsen, X U Chen
BACKGROUND: The objective of this study was to assess the procedural outcomes of catheter ablation guided by remote magnetic navigation (RMN) in a large cohort of patients with paroxysmal trial fibrillation (PAF) and persistent AF (PerAF). METHODS: A total of 726 patients (547 male, age: 58.5 ± 10.3 years) with symptomatic AF (61% PAF) were analyzed from a prospective ablation registry. Procedural parameters including pulmonary venous (PV) anatomy, left atrial (LA) volume, procedural time, ablation time, fluoroscopy time, total X-ray dose, and complications were assessed...
March 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26854647/pre-transplant-phospholipase-a2-receptor-autoantibody-concentration-is-associated-with-clinically-significant-recurrence-of-membranous-nephropathy-post-kidney-transplantation
#11
Gaurav Gupta, Hasan Fattah, Rivka Ayalon, Jason Kidd, Todd Gehr, Luis F Quintana, Pamela Kimball, Salima Sadruddin, H Davis Massey, Dhiren Kumar, Anne L King, Laurence H Beck
Previous studies that have assessed the association of pre-transplant antiphospholipase A2 receptor autoantibody (PLA2R-Ab) concentration with a recurrence of membranous nephropathy (rMN) post-kidney transplant have yielded variable results. We tested 16 consecutive transplant patients with a history of iMN for pre-transplant PLA2R-Ab. Enzyme-linked immunosorbent assay titers (Euroimmun, NJ, USA) >14 RU/mL were considered positive. A receiver operating characteristic (ROC) analysis was performed after combining data from Quintana et al...
April 2016: Clinical Transplantation
https://www.readbyqxmd.com/read/26794820/a-rare-localization-of-neurothekeomas-of-radial-nerve-a-case-report
#12
L Di Sante, F Camerota, C Celletti, F Ioppolo, V Santilli, E David
Neurothekeoma is a very rare benign connective tissue tumour that presumably derived from nerve sheath cells. We described the case of a rare localization of neurothekeoma in the upper limb with a strange presentation. A 49 years-old woman presented to the Physical Medicine and Rehabilitation Division of the Umberto I Hospital referring an intensive pain associated to paresthesias at the left forearm lasting from six months. The patient had a history of epicondylitis confirmed with an elbow RMN showing an increased thickness of the tendon insertions on the epicondiloidea region of the elbow...
November 2015: La Clinica Terapeutica
https://www.readbyqxmd.com/read/26577960/micromechanical-intervention-in-sandwich-restoration
#13
Tabinda Nawaz Khan, Syed Yawar Ali Abidi, Khush Bakht Nawaz Khan, Shahbaz Ahmed, Fazal Ur Rehman Qazi, Noureen Saeed
OBJECTIVE: To evaluate the sealing ability of two different types of Glass Ionomer Cements (GICs) used for sandwich restorations and assess the effect of acid etching of GIC on microleakage at GIC-resin composite interface. STUDY DESIGN: Experimental study. PLACE AND DURATION OF STUDY: Department of Operative, DIEKIOHS (DUHS) and NED University, Karachi, from February to June 2011. METHODOLOGY: Eighty cavities were prepared on the proximal surfaces of 40 permanent human premolars (2 cavities per tooth), assigned to 4 groups (n=20) and restored as follows: Group CIE - Conventional GIC (CI) was applied onto the axial and cervical cavity walls, allowed setting for 5 minutes and acid etched (E) along the cavity margins with 37% phosphoric acid for 15 seconds, washed for 30 seconds and dried; the adhesive system was applied and light cured for 10 seconds, completing the restoration with composite resin light cured for 40 seconds; Group CIN - same as Group CIE, except for acid etching of the CI surface; Group RME - same as CIE, but using a resin modified GIC (RMGIC); Group RMN - same as Group RME, except for acid etching of the RMGIC surface...
November 2015: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/26507838/biosynthesis-of-mercapturic-acid-derivative-of-the-labdane-type-diterpene-cyslabdan-that-potentiates-imipenem-activity-against-methicillin-resistant-staphylococcus-aureus-cyslabdan-is-generated-by-mycothiol-mediated-xenobiotic-detoxification
#14
Haruo Ikeda, Kazuo Shin-Ya, Tohru Nagamitsu, Hiroshi Tomoda
Genome mining of cyslabdan-producing Streptomyces cyslabdanicus K04-0144 revealed that a set of four genes, cldA, cldB, cldC, and cldD (the cld cluster), which formed a single transcriptional unit, were involved in the biosynthesis of cyslabdan that potentiates imipenem activity against methicillin-resistant Staphylococcus aureus. Experimental studies supported the heterologous expression of the cld cluster of S. cyslabdanicus K04-0144 in S. avermitilis SUKA22, and transformants carrying the cld cluster produced not only cyslabdan A (1), but also its new derivatives, 17-hydroxyl-1 (2) and 2-hydroxyl-1 (3), in the culture broth...
March 2016: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/26337930/inferring-microbial-interaction-network-from-microbiome-data-using-rmn-algorithm
#15
Kun-Nan Tsai, Shu-Hsi Lin, Wei-Chung Liu, Daryi Wang
BACKGROUND: Microbial interactions are ubiquitous in nature. Recently, many similarity-based approaches have been developed to study the interaction in microbial ecosystems. These approaches can only explain the non-directional interactions yet a more complete view on how microbes regulate each other remains elusive. In addition, the strength of microbial interactions is difficult to be quantified by only using correlation analysis. RESULTS: In this study, a rule-based microbial network (RMN) algorithm, which integrates regulatory OTU-triplet model with parametric weighting function, is being developed to construct microbial regulatory networks...
2015: BMC Systems Biology
https://www.readbyqxmd.com/read/26216480/impact-of-catheter-ablation-with-remote-magnetic-navigation-on-procedural-outcomes-in-patients-with-persistent-and-long-standing-persistent-atrial-fibrillation
#16
Qi Jin, Steen Pehrson, Peter Karl Jacobsen, Xu Chen
BACKGROUND: The objectives of this study were to assess the procedural outcomes of persistent and long-standing persistent atrial fibrillation (PsAF and L-PsAF) ablation guided by remote magnetic navigation (RMN), and to detect factors predicting acute restoration of sinus rhythm (SR) by ablation with RMN. METHODS: A total of 313 patients (275 male, age 59 ± 9.5 years) with PsAF (187/313) or L-PsAF (126/313) undergoing ablation using RMN were included. Patients' disease history, pulmonary venous anatomy, left atrial (LA) volume, procedure time, mapping plus ablation time, radiofrequency (RF) ablation time, fluoroscopy time, radiation dose, and complications were assessed...
November 2015: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/26215291/remote-magnetic-navigation-vs-manual-navigation-for-ablation-of-ventricular-tachycardia-a-meta-analysis
#17
Y Wu, K-L Li, J Zheng, C-Y Zhang, X-Y Liu, Z-M Cui, Z-M Yu, R-X Wang, W Wang
BACKGROUND: The purpose of this study was to prospectively evaluate the efficacy and safety of remote magnetic navigation (RMN) in comparison with manual catheter navigation (MCN) in performing ventricular tachycardia ablation. METHODS: An electronic search was performed using PubMed (1948-2013) and EMBASE (1974-2013) studies comparing RMN with MCN which were published prior to 31 December 2013. Outcomes of interest were as follows: acute success, recurrence rate, complications, total procedure and fluoroscopic times...
September 2015: Netherlands Heart Journal
https://www.readbyqxmd.com/read/26208344/a-random-algorithm-for-low-rank-decomposition-of-large-scale-matrices-with-missing-entries
#18
Yiguang Liu, Yinjie Lei, Chunguang Li, Wenzheng Xu, Yifei Pu
A random submatrix method (RSM) is proposed to calculate the low-rank decomposition U(m×r)V(n×r)(T) (r < m, n) of the matrix Y∈R(m×n) (assuming m > n generally) with known entry percentage 0 < ρ ≤ 1. RSM is very fast as only O(mr(2)ρ(r)) or O(n(3)ρ(3r)) floating-point operations (flops) are required, compared favorably with O(mnr+r(2)(m+n)) flops required by the state-of-the-art algorithms. Meanwhile, RSM has the advantage of a small memory requirement as only max(n(2),mr+nr) real values need to be saved...
November 2015: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/26200478/safety-and-clinical-outcome-of-catheter-ablation-of-ventricular-arrhythmias-using-contact-force-sensing-consecutive-case-series
#19
A A Hendriks, F Akca, L Dabiri Abkenari, M Khan, R Bhagwandien, S C Yap, S Wijchers, Tamas Szili-Torok
BACKGROUND: Poor catheter-to-myocardial contact can lead to ineffective ablation lesions and suboptimal outcome. Contact force (CF) sensing catheters in ventricular tachyarrhythmia (VT) ablations has not been studied for their long-term efficacy. PURPOSE: The aim of this study was to compare CF ablation to manual ablation (MAN) and remote magnetic navigation (RMN) ablation for safety and efficacy in acute and long-term outcome. METHODS: A total of 239 consecutive patients who underwent VT ablation with the use of MAN, CF or RMN catheters were included in this single-center cohort study from January 2007 until March 2014...
July 20, 2015: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/25964112/mapping-strategy-for-multiple-atrial-tachyarrhythmias-in-a-transplant-heart
#20
Qi Jin, Steen Pehrson, Peter Karl Jacobsen, Xu Chen
BACKGROUND: Different atrial arrhythmias can coexist in the recipient and donor atria after heart transplantation. CASE PRESENTATION: We report an unusual case of a patient with three different types of atrial arrhythmia after heart transplantation: an atrial fibrillation in the recipient atria, and a cavotricuspid isthmus dependent atrial flutter and a focal atrial tachycardia in the donor atria. 3D electroanatomical mapping and ablation were guided by remote magnetic navigation (RMN)...
2015: BMC Cardiovascular Disorders
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