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E Mema, L Kondic, L J Cummings
The interaction between nematic liquid crystals and polymer-coated substrates may lead to slow reorientation of the easy axis (so-called "director gliding") when a prolonged external field is applied. We consider the experimental evidence of zenithal gliding observed by Joly et al. [Phys. Rev. E 70, 050701 (2004)PLEEE81539-375510.1103/PhysRevE.70.050701] and Buluy et al. [J. Soc. Inf. Disp. 14, 603 (2006)1071-092210.1889/1.2235686] as well as azimuthal gliding observed by S. Faetti and P. Marianelli [Liq...
March 2018: Physical Review. E
Hai Lei Li, Yiu Che Chan, Stephen W Cheng
OBJECTIVE: Aortic stent-graft infection is rare, but remains one of the most challenging and threatening complications. This systematic review aimed to identify the clinical features, treatment and outcomes of endograft infection after abdominal endovascular aortic repair (EVAR) and thoracic endovascular aortic repair (TEVAR). METHODS: A systematic literature review of all published literature from January 1991 to September 2016 on stent-graft infection was performed under the instruction of Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA)...
May 14, 2018: Annals of Vascular Surgery
Nikolaos Tsilimparis, Sebastian Debus, Min Chen, Qing Zhou, Mary-Margaret Seale, Tilo Kölbel
OBJECTIVE: Thoracic endovascular aortic repair (TEVAR) is currently the treatment of choice for most diseases of the descending thoracic aorta. Using data from the Study to Assess Outcomes After Endovascular Repair for Multiple Thoracic Aortic Diseases (SUMMIT) study we investigated the outcomes of TEVAR for different aortic diseases and risk factors associated with the outcomes. METHODS: The SUMMIT study included aggregated data of 521 TEVAR patients from five Cook-sponsored multicenter trials evaluating thoracic endografts of the Zenith platform (William Cook Europe, ApS, Bjaeverskov, Denmark)...
May 7, 2018: Journal of Vascular Surgery
Lorenzo Iovino, Francesco Mazziotta, Giovanni Carulli, Francesca Guerrini, Riccardo Morganti, Valentina Mazzotti, Fabrizio Maggi, Lisa Macera, Enrico Orciuolo, Gabriele Buda, Edoardo Benedetti, Francesco Caracciolo, Sara Galimberti, Mauro Pistello, Mario Petrini
INTRODUCTION: Zinc plays an important role in thymic function and immune homeostasis. We performed a prospective clinical trial using a high-dose zinc oral supplementation to improve the immune reconstitution after hematopoietic stem cell transplant (HSCT). PATIENTS AND METHODS: We enrolled 18 patients undergoing autologous HSCT for multiple myeloma. Nine patients were randomized to receive only a standard antimicrobial prophylaxis; whereas, nine patients received in addition 150 mg/day of zinc from day +5 to day +100 after transplant...
May 2, 2018: Leukemia Research
Zwelethu Mfanafuthi Mdletshe, Sithembile Zenith Ndlela, Ignatius Verla Nsahlai, Michael Chimonyo
The objective of the study was to compare factors influencing water scarcity for goats in areas where there are seasonal and perennial rivers under resource-limited communal farming environments. Data were collected using a structured questionnaire (n = 285) administered randomly to smallholder goat farmers from areas with seasonal and perennial rivers. Ceremonies was ranked as the major reason for keeping goats. Water scarcity was ranked the major constraint to goat production in areas with seasonal rivers when compared to areas with perennial rivers (P < 0...
May 9, 2018: Tropical Animal Health and Production
S Keisin Wang, Andres Fajardo, Raghu L Motaganahalli, Alok K Gupta
Current surgical dogma for infected aortic endografts consists of complete explantation concurrent with revascularization via extra-anatomic bypass or in situ infection-resistant conduit. However, this treatment paradigm is associated with high rates of postoperative mortality and major morbidity. Therefore, patients with prohibitive operative risk are often not offered surgical intervention. In the following manuscript, we report the successful treatment of an 85-year-old gentleman with a fenestrated aortic endograft (Cook Medical, Bloomington, Indiana) infected secondary to the formation of an aortoenteric fistula with primary bowel repair, washout, and lifelong antibiotics and followed for nearly 2 years after intervention...
January 1, 2018: Vascular and Endovascular Surgery
Ying Mao, Shengqiang Wang, Zhongfeng Qiu, Deyong Sun, Muhammad Bilal
Secchi disk depth (Zsd ), represents water transparency which is an intuitive indicator of water quality and can be used to derive inherent optical properties, chlorophyll-a concentrations, and primary productivity. In this study, the Zsd was derived from the Geostationary Ocean Color Imager (GOCI) data over the Bohai Sea (BHS) and the Yellow Sea (YS) using a regional tuned model. To validate the GOCI derived Zsd observations, in situ data, were collected for the BHS and YS regions. Results showed a good agreement between the GOCI derived Zsd observations and in situ measurements with a determination coefficient of 0...
April 30, 2018: Optics Express
Brian J Redman, Joseph A Shaw, Paul W Nugent, R Trevor Clark, Sabino Piazzolla
A reflective all-sky imaging system has been built using a long-wave infrared microbolometer camera and a reflective metal sphere. This compact system was developed for measuring spatial and temporal patterns of clouds and their optical depth in support of applications including Earth-space optical communications. The camera is mounted to the side of the reflective sphere to leave the zenith sky unobstructed. The resulting geometric distortion is removed through an angular map derived from a combination of checkerboard-target imaging, geometric ray tracing, and sun-location-based alignment...
April 30, 2018: Optics Express
Alexander Gilerson, Carlos Carrizo, Robert Foster, Tristan Harmel
The value and spectral dependence of the reflectance coefficient (ρ) of skylight from wind-roughened ocean surfaces is critical for determining accurate water leaving radiance and remote sensing reflectances from shipborne, AERONET-Ocean Color and satellite observations. Using a vector radiative transfer code, spectra of the reflectance coefficient and corresponding radiances near the ocean surface and at the top of the atmosphere (TOA) are simulated for a broad range of parameters including flat and windy ocean surfaces with wind speeds up to 15 m/s, aerosol optical thicknesses of 0-1 at 440nm, wavelengths of 400-900 nm, and variable Sun and viewing zenith angles...
April 16, 2018: Optics Express
J L Klotz, G E Aiken, A M Egert-McLean, F N Schrick, N Chattopadhyay, D L Harmon
Previous research has demonstrated that exposure to ergot alkaloids reduces vasoactivity of serotonin (5HT) receptors. Chemical suppression of tall fescue seedhead production is a tool to reduce the level of exposure to ergot alkaloids by a grazing animal. Therefore, the objective was to evaluate contractility of lateral saphenous veins biopsied from mixed breed steers following a 87- to 101-d grazing period on 3-ha pastures of bermudagrass (Cynodon dactylon; n = 5 steers; BW = 340 ±9 kg), or toxic endophyte-infected tall fescue (Lolium arundinaceum) that was not treated (n = 5 steers; BW = 300 ±6; 0...
April 26, 2018: Journal of Animal Science
Jing Lin, Niraj Parikh, Naval Udgiri, Shaoxia Wang, Daniel F Miller, Chaojing Li, Jean Panneton, Mark Nutley, Ze Zhang, Yunfan Huang, Jun Lu, Jingyi Zhang, Lu Wang, Robert Guidoin
PURPOSE: To examine the effects of in situ laser fenestration and subsequent balloon dilation (noncompliant vs cutting) on the graft fabric of 4 aortic stent-graft models. METHOD: In an in vitro setup, the Zenith TX2, Talent, Endurant, and Anaconda aortic stent-grafts (all made of polyester graft material) were subjected to laser fenestration with a 2.3-mm-diameter probe at low and high energy in a physiologic saline solution followed by balloon dilation of the hole...
April 1, 2018: Journal of Endovascular Therapy
Atsushi Omura, Hitoshi Matsuda, Jiro Matsuo, Junjiro Kobayashi
An 81-year-old woman was referred to our centre for emergency surgery with a suspected diagnosis of acute aortic dissection. Laboratory tests showed marked elevation of serum creatinine and blood urea nitrogen. Enhanced computed tomography (CT) demonstrated Type A aortic dissection with a thrombosed false lumen in the ascending aorta. The primary entry tear was located 2 cm distal to the left subclavian artery. Malperfusion of bilateral renal arteries was also evident due to compression by the false lumen...
April 24, 2018: European Journal of Cardio-thoracic Surgery
J C Zhu, X C Dai, Y D Luo, H L Fan, Z Feng, Y W Zhang, F G Hu
Objective: To evaluate the early results of fenestrated endovascular aortic repair (FEVAR) using physician-modified stent grafts (PMSGs) for the treatment of patients with thoracoabdominal pathologies. Methods: Nineteen consecutive patients who underwent FEVAR using PMSGs between April 2012 and September 2017 were retrospectively reviewed. The modality of FEVAR technique was assessed, perioperative clinical data was recorded and the early results were evaluated. Results: Indications were thoracoabdominal aortic pathologies, including juxtarenal abdominal aortic aneurysm (JAAA) ( n =12), chronic thoracoabdominal aortic dissection with aneurysmal dilatation ( n =3), thoracoabdominal aortic aneurysm (TAAA) ( n =1), infrarenal AAA with an accessory renal artery in the segment of the aneurysmal neck ( n =2) and type Ⅰ endoleak after EVAR for AAA( n =1)...
March 27, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Bao Shu, Hui Liu, Longwei Xu, Chuang Qian, Xiaopeng Gong, Xiangdong An
For GPS medium-long baseline real-time kinematic (RTK) positioning, the troposphere parameter is introduced along with coordinates, and the model is ill-conditioned due to its strong correlation with the height parameter. For BeiDou Navigation Satellite System (BDS), additional difficulties occur due to its special satellite constellation. In fact, relative zenith troposphere delay (RZTD) derived from high-precision empirical zenith troposphere models can be introduced. Thus, the model strength can be improved, which is also called the RZTD-constrained RTK model...
April 14, 2018: Sensors
Shannon Franks, Christopher S R Neigh, Petya K Campbell, Guoqing Sun, Tian Yao, Qingyuan Zhang, Karl F Huemmrich, Elizabeth M Middleton, Stephen G Ungar, Stuart W Frye
The Earth Observing One (EO-1) satellite has completed 16 years of Earth observations in early 2017. What started as a technology mission to test various new advancements turned into a science and application mission that extended many years beyond the satellite's planned life expectancy. EO-1's primary instruments are spectral imagers: Hyperion, the only civilian full spectrum spectrometer (430-2400 nm) in orbit; and the Advanced Land Imager (ALI), the prototype for Landsat-8's pushbroom imaging technology...
May 2017: Remote Sensing
Zenith Gaye A Orozco, Satoshi Soma, Toyoji Kaneko, Soichi Watanabe
The mRNA expressions of the epithelial neutral amino acid transporters slc6a18 and slc6a19a in the five segments (HL, PMC, GL, DMC, and TS) of the intestine of Mozambique tilapia , and their responses to fasting and refeeding were investigated for a better understanding of the functional and nutritional characteristics of slc6a18 and slc6a19a . Although both slc6a18 and slc6a19a were expressed mainly in the intestine, these genes showed opposing spatial distributions along the intestine. The slc6a18 was mainly expressed in the middle (GL) and posterior (DMC and TS) intestines, while slc6a19a was specifically expressed in the anterior intestine (HL and PMC)...
2018: Frontiers in Physiology
Jose A Fernandez-Gallego, Shawn C Kefauver, Nieves Aparicio Gutiérrez, María Teresa Nieto-Taladriz, José Luis Araus
Background: The number of ears per unit ground area (ear density) is one of the main agronomic yield components in determining grain yield in wheat. A fast evaluation of this attribute may contribute to monitoring the efficiency of crop management practices, to an early prediction of grain yield or as a phenotyping trait in breeding programs. Currently the number of ears is counted manually, which is time consuming. Moreover, there is no single standardized protocol for counting the ears...
2018: Plant Methods
Rami O Tadros, Alex Sher, Martin Kang, Ageliki Vouyouka, Windsor Ting, Daniel Han, Michael Marin, Peter Faries
OBJECTIVE: The ideal treatment option for patients with complex aneurysm morphology remains highly debated. The aim of this study was to investigate the impact of endovascular aneurysm repair (EVAR) with active fixation on outcomes in patients with complex aneurysm morphology. METHODS: There were 340 consecutive patients who underwent EVAR using active fixation devices, 234 with active infrarenal fixation (AIF; Gore Excluder; W. L. Gore & Associates, Flagstaff, Ariz) and 106 with active suprarenal fixation (ASF; 85 Medtronic Endurant [Medtronic, Santa Rosa, Calif] and 21 Cook Zenith [Cook Medical, Bloomington, Ind])...
March 13, 2018: Journal of Vascular Surgery
Takahiko Masuda, Masaki Hata, Kazuhiro Yamaya, Tomoyuki Suzuki, Naoya Terao
Thoracic endovascular aortic repair (TEVAR) is used to treat retrograde type A acute aortic dissection (RTAAD). In case 1, a 52-year-old man, who was conservatively managed, reported worsening back pain. Emergency TEVAR was performed 7 days after onset. After deploying two GORE Conformable TAG (CTAG) in the descending aorta, his symptoms disappeared. In case 2, a 52-year-old man with progressive worsening resistant hypertension, renal dysfunction, and respiratory failure despite maximal medical therapy underwent TEVAR 8 days after onset...
March 3, 2018: Annals of Thoracic and Cardiovascular Surgery
Thaís Teixeira de Paiva, Ricardo Martins Machado, Alexandre Trindade Motta, Claudia Trindade Mattos
INTRODUCTION: Our objectives were to verify the impact of alterations in the vertical position of the maxillary canines in smile esthetic perceptions and to determine whether exposure of the gingival margins directly affects laypersons' and orthodontists' perceptions. METHODS: A smile photograph of a male subject showing gingival zeniths was selected, and the canine vertical positions were symmetrically modified in increments of 0.5 mm, creating 4 new images varying from 1...
March 2018: American Journal of Orthodontics and Dentofacial Orthopedics
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