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https://www.readbyqxmd.com/read/28420217/microfluidic-ebg-sensor-based-on-phase-shift-method-realized-using-3d-printing-technology
#1
Vasa Radonić, Slobodan Birgermajer, Goran Kitić
In this article, we propose a novel microfluidic microstrip electromagnetic band gap (EBG) sensor realized using cost-effective 3D printing technology. Microstrip sensor allows monitoring of the fluid properties flowing in the microchannel embedded between the microstrip line and ground plane. The sensor's operating principle is based on the phase-shift method, which allows the characterization at a single operating frequency of 6 GHz. The defected electromagnetic band gap (EBG) structure is realized as a pattern in the microstrip ground plane to improve sensor sensitivity...
April 18, 2017: Sensors
https://www.readbyqxmd.com/read/28417538/synthesis-of-long-oxahelicenes-by-polycyclization-in-a-flow-reactor
#2
Jindřich Nejedlý, Michal Šámal, Jiří Rybáček, Miroslava Tobrmanová, Florence Szydlo, Christophe Coudret, Maria Neumeier, Jaroslav Vacek, Jana Vacek Chocholoušová, Miloš Buděšínský, David Šaman, Lucie Bednárová, Ladislav Sieger, Irena G Stará, Ivo Starý
A series of oxahelicenes composed of ortho/meta-annulated benzene/pyridine and 2H-pyran rings were synthesized on the basis of the cobalt(I)-mediated (or rhodium(I)- or nickel(0)-mediated) double, triple, or quadruple [2+2+2] cycloisomerization of branched aromatic hexa-, nona-, or dodecaynes, thus allowing the construction of 6, 9, or 12 rings in a single operation. The use of a flow reactor was found to be beneficial for the multicyclization reactions. The stereogenic centers present in some of the oligoynes steered the helical folding in such a way that the final oxa[9]-, [13]-, [17]- and [19]helicenes were obtained in both enantiomerically and diastereomerically pure form...
April 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28403110/a-feasibility-study-of-digital-single-operator-cholangioscopy-for-diagnostic-and-therapeutic-procedure-with-videos
#3
Miyuki Imanishi, Takeshi Ogura, Yoshitaka Kurisu, Saori Onda, Wataru Takagi, Atsushi Okuda, Akira Miyano, Mio Amano, Nobu Nishioka, Daisuke Masuda, Kazuhide Higuchi
Recently, the novel SpyGlass DS Direct Visualization system (SPY DS) has become available. This system offers several advantages over the conventional SPYGlass system. This study evaluated the clinical feasibility and efficacy of diagnostic and therapeutic procedures for biliary disorder using SPY DS.In this retrospective study, consecutive patients who had biliary disorder were enrolled between November 2015 and February 2016. All patients could not be diagnosed or treated by standard endoscopic retrograde cholangiopancreatography in our hospital or at another hospital...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28396191/prostate-artery-embolization-via-transradial-or-transulnar-versus-transfemoral-arterial-access-technical%C3%A2-results
#4
Shivank Bhatia, Sardis H Harward, Vishal K Sinha, Govindarajan Narayanan
PURPOSE: To compare safety and feasibility of prostate artery embolization (PAE) via transradial/transulnar access (TR/UA) and transfemoral access (TFA). MATERIALS AND METHODS: A retrospective analysis was conducted for 3 cohorts: the first 32 consecutive PAE procedures performed via TFA (initial TFA, January 2014 to August 2015), the following 32 procedures performed via TFA (advanced TFA, August 2015 to February 2016), and the first 32 procedures performed via TR/UA (February 2016 to July 2016)...
April 7, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28394387/photoredox-catalyzed-oxytrifluoromethylation-of-allenes-stereoselective-synthesis-of-2-trifluoromethylated-allyl-acetates
#5
Ren Tomita, Takashi Koike, Munetaka Akita
We have developed novel oxytrifluoromethylation of aryl-substituted allenes by photoredox catalysis. The present photocatalytic system allows direct and stereoselective synthesis of 2-CF3-allyl acetates bearing tetrasubstituted CF3-alkene scaffolds in a single operation. The obtained CF3-allyl acetates can be applied to further functionalization as CF3-containing building blocks.
April 10, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28389694/utility-of-the-ginza-forceps-for-superficial-phlebectomy-during-endovenous-laser-ablation-of-the-great-saphenous-vein
#6
Takeshi Baba, Takao Ohki, Yuji Kanaoka, Koji Maeda, Kenjirou Kaneko, Masayuki Hara, Kota Shukuzawa, Soichiro Fukushima
PURPOSE: To evaluate the efficiency of using the Ginza forceps (DVx, Tokyo, Japan), which have a long shaft and strong grip, for superficial phlebectomy with the stab avulsion technique, during simultaneous endovenous laser ablation (EVLA) of the great saphenous vein (GSV). METHODS: The subjects were patients treated with EVLA performed by a single operator at one institution. All patients had a GSV diameter of 4-10 mm and an EVLA length of the GSV of >20 cm...
April 7, 2017: Surgery Today
https://www.readbyqxmd.com/read/28381356/blocking-screws-for-alignment-control-in-intramedullary-limb-lengthening
#7
Julian Fürmetz, Stefan Bösl, James Schilling, Florian Wolf, Nikolaus Degen, Peter H Thaller
Simultaneous deformity correction in the frontal and sagittal plane becomes more and more an important part of intramedullary lengthening to avoid further operative procedures. Such as in fracture treatment blocking screws can be used for alignment control if osteotomy is performed in the metaphyseal bone. 31 intramedullary lengthening procedures between 2009 and 2011 were retrospectively analysed for precision of simultaneous deformity correction. The average planned correction to the HKA was 2.4° (0.1°-8...
March 31, 2017: Injury
https://www.readbyqxmd.com/read/28380618/temporal-spatial-inter-and-intra-cow-repeatability-of-thermal-imaging
#8
D T Byrne, D P Berry, H Esmonde, N McHugh
The objective of the present study was to quantify the within- and between-cow, operator, and day variances of various descriptive temperature parameters from different anatomical areas captured using thermal images on Holstein-Friesian cows. Three experiments were undertaken. In Exp. 1, 30 images were captured by a single operator of each of the eye, hoof, and udder from each of 45 cows; in Exp. 2, three different operators captured eye and hoof images from 12 cows; and in Exp. 3, eye and hoof images were captured by a single operator from 8 cows over a 5-d period...
February 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28367324/comparative-study-of-27-gauge-versus-25-gauge-vitrectomy-for-the-treatment-of-primary-rhegmatogenous-retinal-detachment
#9
Stanislao Rizzo, Silvio Polizzi, Francesco Barca, Tomaso Caporossi, Gianni Virgili
Purpose. To compare the vitrectomy time, clinical outcomes, and complications between 27-gauge (27-G) and 25-gauge (25-G) vitrectomy in patients with primary rhegmatogenous retinal detachment (PRRD). Methods. Prospective, nonrandomized, comparative, interventional study. Forty consecutive patients with PRRD were recruited. Twenty patients underwent the 27-gauge procedure and twenty patients had the 25-gauge procedure. The main outcome measure of the study was the actual vitrectomy time. Results. The mean duration of vitreous removal was 23...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28356032/impact-of-percutaneous-closure-of-interatrial-shunts-on-migraine-attacks-single-operator-series-and-review-of-the-literature
#10
Antonis S Manolis
BACKGROUND: The association of migraine with intracardiac communications and a resultant improvement with their closure has been a matter of controversy. Mostly observational and retrospective studies indicate a significant improvement in migraine attacks in patients undergoing percutaneous closure procedures. However, there is a paucity of randomized trials on this topic and prospective data provide little evidence that the device closure approach has any significant effect on migrainous attacks...
March 28, 2017: Reviews on Recent Clinical Trials
https://www.readbyqxmd.com/read/28349613/prospective-evaluation-of-digital-single-operator-cholangioscope-for-diagnostic-and-therapeutic-procedures-with-videos
#11
Takeshi Ogura, Miyuki Imanishi, Kurisu Yoshitaka, Saori Onda, Tastsushi Sano, Wataru Takagi, Atsushi Okuda, Akira Miyano, Mio Amano, Nobu Nishioka, Tadahiro Yamada, Daisuke Masuda, Mamoru Takenaka, Masayuki Kitano, Kazuhide Higuchi
OBJECTIVES: Recently, the digital single-operator cholangioscope (DSOCS) has become available. This system may allow diagnosis by direct visualization and allow performance of various therapeutic procedures. The aim of this study was to prospectively evaluate the clinical utility of the DSOCS for diagnostic and therapeutic procedures for biliary disease. METHODS: Technical success was defined as successful visualization of target lesions in the biliary tract and performing forceps biopsy as a diagnostic procedure, and successfully performing treatment such as guidewire insertion for the area of interest, electrohydraulic lithotripsy (EHL), or migrated stent removal...
March 28, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28340649/the-external-nasal-valve
#12
REVIEW
Grant S Hamilton
The external nasal valve is a complex entity comprised of multiple structures and tissue types. As such, there is no single operation that can address all problems of the external valve. This article reviews the relevant anatomy, pathologic conditions, and treatments for external nasal valve dysfunction, including a detailed review of the nasal muscles and their contribution to external nasal valve patency. Surgical and nonsurgical options for treatment and the evidence supporting the importance of proper external nasal valve function on quality-of-life measures are discussed...
May 2017: Facial Plastic Surgery Clinics of North America
https://www.readbyqxmd.com/read/28337482/efficacy-and-safety-of-novel-digital-single-operator-peroral-cholangioscopy-guided-laser-lithotripsy-for-complicated-biliary-stones
#13
John Ct Wong, Raymond Sy Tang, Anthony Yb Teoh, Joseph Jy Sung, James Yw Lau
Background/study aims Laser lithotripsy can effectively fragment complicated biliary stones, but current cholangioscopes are limited by fragility, restricted mobility or moderate visual resolution. The efficacy and safety of a new digital single-operator peroral cholangioscope to guide laser lithotripsy were evaluated. Patients and methods In this prospective single-center series, consecutive patients with complicated biliary stones, defined as impacted stones > 1.5 cm in size and wider than the more distal common bile duct, or stones that failed extraction by basket mechanical lithotripsy, underwent ERCP and SpyGlass DS peroral cholangioscope (Boston Scientific, Marlborough, United States)-guided laser lithotripsy...
January 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28333716/internal-aspiration-under-perfluorocarbon-liquid-for-the-management-of-large-macular-holes
#14
Oded Ohana, Adiel Barak, Shulamit Schwartz
PURPOSE: To report the outcomes of pars plana vitrectomy with internal aspiration under perfluorocarbon liquid for large macular holes (MH). METHODS: Retrospective consecutive case series of patients with large (>400 µm) MH. All treated were with pars plana vitrectomy, internal limiting membrane peeling, internal fluid aspiration under perfluorocarbon liquid, and gas/oil tamponade. Outcomes included closure rate and visual acuity at 6 months. RESULTS: Twenty eyes of 20 patients were included...
January 11, 2017: Retina
https://www.readbyqxmd.com/read/28322486/a-molecular-circuit-regenerator-to-implement-iterative-strand-displacement-operations
#15
Nicole V DelRosso, Sarah Hews, Lee Spector, Nathan D Derr
The predictable chemistry of Watson-Crick base-pairing imparts a unique structural programmability to DNA, enabling the facile design of molecular reactions that perform computations. However, many of the current architectures limit devices to a single operational cycle. Herein, we introduce the design of the "regenerator", a device based on coupled enthalpic and entropic reactions that permits the regeneration of molecular circuit components.
March 21, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28315496/remeex-device-external-mechanical-regulator-for-female-stress-urinary-incontinence-a-critical-review-of-a-single-operator-long-term-experience-on-implants-and-readjustments
#16
Franco Mantovani
OBJECTIVE: A single-operator, long-term (15 years) experience on a sling technique that allows a postoperative adjustment of its tension is presented to retrospectively report the objective and subjective outcomes in the treatment of female stress urinary incontinence (SUI). The readjustment option prevents the need of a reoperation in case of relapse with great compliance of the patients. MATERIALS AND METHODS: Indications for surgical tratment of SUI by ReMeEx included patients affected with not only true intrinsic sphyncteric deficency (ISD) and fixed urethra but also mild urethral hypermobility, previous incontinence surgery and relapsing conditions such as diabetes and obesity...
March 18, 2017: Urologia
https://www.readbyqxmd.com/read/28314674/further-validation-of-the-hybrid-algorithm-for-cto-pci-difficult-lesions-same-success
#17
Mir B Basir, Aris Karatasakis, Mohammad Alqarqaz, Barbara Danek, Bavana V Rangan, Emmanouil S Brilakis, Henry Kim, William W O'Neill, Khaldoon Alaswad
OBJECTIVES: To evaluate the success rates and outcome of the hybrid algorithm for chronic total occlusion (CTO) percutaneous coronary intervention (PCI) by a single operator in two different clinical settings. METHODS: We compared 279 consecutive CTO PCIs performed by a single, high-volume operator using the hybrid algorithm in two different clinical settings. Data were collected through the PROGRESS CTO Registry. We compared 145 interventions performed in a community program (cohort A) with 134 interventions performed in a referral center (cohort B)...
February 22, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28301627/single-staged-tunneled-cheek-interpolation-flap-with-cartilage-batten-graft-for-repair-of-nasal-ala-defect
#18
Tatyana A Petukhova, Jayne S Joo, Daniel B Eisen
<p>Surgical defects located within 5 mm of the nasal alar margin are at risk for alar elevation or collapse of the external nasal valve during wound healing. To reduce the chance of such complications, free cartilage grafts may be used as part of the reconstruction. However, if the defect is large enough so that the free cartilage graft does not fill most of the defect, wound contraction can still lead to alar displacement. In these situations, skin may need to be recruited from either the forehead or cheek in the form of an interpolation flap to cover both the free cartilage graft and the residual cutaneous defect...
March 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28298908/serpentinization-influenced-groundwater-harbors-extremely-low-diversity-microbial-communities-adapted-to-high-ph
#19
Katrina I Twing, William J Brazelton, Michael D Y Kubo, Alex J Hyer, Dawn Cardace, Tori M Hoehler, Tom M McCollom, Matthew O Schrenk
Serpentinization is a widespread geochemical process associated with aqueous alteration of ultramafic rocks that produces abundant reductants (H2 and CH4) for life to exploit, but also potentially challenging conditions, including high pH, limited availability of terminal electron acceptors, and low concentrations of inorganic carbon. As a consequence, past studies of serpentinites have reported low cellular abundances and limited microbial diversity. Establishment of the Coast Range Ophiolite Microbial Observatory (California, U...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28295806/proteins-mediating-dna-loops-effectively-block-transcription
#20
Zsuzsanna Vörös, Yan Yan, Daniel T Kovari, Laura Finzi, David Dunlap
Loops are ubiquitous topological elements formed when proteins simultaneously bind to two noncontiguous DNA sites. While a loop-mediating protein may regulate initiation at a promoter, the presence of the protein at the other site may be an obstacle for RNA polymerases (RNAP) transcribing a different gene. To test whether a DNA loop alters the extent to which a protein blocks transcription, the lac repressor (LacI) was used. The outcome of in vitro transcription along templates containing two LacI operators separated by 400 bp in the presence of LacI concentrations that produced both looped and unlooped molecules was visualized with scanning force microscopy (SFM)...
March 14, 2017: Protein Science: a Publication of the Protein Society
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