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https://www.readbyqxmd.com/read/28927217/surgical-technique-for-high-flow-internal-maxillary-artery-to-middle-cerebral-artery-bypass-using-a-superficial-temporal-artery-interposition-graft
#1
Xuequan Feng, Ali Tayebi Meybodi, Jordina Rincon-Torroella, Ivan H El-Sayed, Michael T Lawton, Arnau Benet
BACKGROUND: Extracranial-to-intracranial high-flow bypass often requires cranial, cervical, and graft site incisions. The internal maxillary artery (IMA) has been proposed as a donor to decrease invasiveness, but its length is insufficient for direct intracranial bypass. We report interposition of a superficial temporal artery (STA) graft for high-flow IMA to middle cerebral artery (MCA) bypass using a middle fossa approach. OBJECTIVE: To assess the feasibility of an IMA-STA graft-MCA bypass using a new middle fossa approach...
April 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28905060/an-engineering-approach-to-synthesis-of-gold-and-silver-nanoparticles-by-controlling-hydrodynamics-and-mixing-based-on-a-coaxial-flow-reactor
#2
Razwan Baber, Luca Mazzei, Nguyen Thi Kim Thanh, Asterios Gavriilidis
In this work we present a detailed study of flow technology approaches that could open up new possibilities for nanoparticle synthesis. The synthesis of gold and silver nanoparticles (NPs) in a flow device based on a coaxial flow reactor (CFR) was investigated. The CFR comprised of an outer glass tube of 2 mm inner diameter (I.D.) and an inner glass tube whose I.D. varied between 0.142 and 0.798 mm. A split and recombine (SAR) mixer and coiled flow inverter (CFI) were further employed to alter the mixing conditions after the CFR...
September 14, 2017: Nanoscale
https://www.readbyqxmd.com/read/28902941/intestinal-inflammatory-and-redox-responses-to-the-perioperative-administration-of-teduglutide-in-rats
#3
Beatriz Pinto da Costa, Ana Cristina Gonçalves, Ana Margarida Abrantes, Paulo Matafome, Raquel Seiça, Ana Bela Sarmento-Ribeiro, Maria Filomena Botelho, Francisco Castro-Sousa
Purpose: To investigate the inflammatory and redox responses to teduglutide on an animal model of laparotomy and intestinal anastomosis. Methods: Wistar rats (n=62) were allocated into four groups: "Ileal Resection and Anastomosis" vs. "Laparotomy", each one split into "Postoperative Teduglutide Administration" vs. "No Treatment"; and euthanized at the third or the seventh day. Ileal and blood samples were recovered at the baseline and at the euthanasia. Flow cytometry was used to study the inflammatory response (IL-1α, MCP-1, TNF-α, IFN-γ and IL-4 levels), oxidative stress (cytosolic peroxides, mitochondrial reactive species, intracellular glutathione and mitochondrial membrane potential) and cellular viability and death (annexin V/propidium iodide double staining)...
August 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28890680/study-of-flow-behaviors-of-droplet-merging-and-splitting-in-microchannels-using-micro-piv-measurement
#4
Feng Shen, Yi Li, Zhaomiao Liu, XiuJun Li
Droplet merging and splitting are important droplet manipulations in droplet-based microfluidics. However, the fundamental flow behaviors of droplets were not systematically studied. Hence, we designed two different microstructures to achieve droplet merging and splitting respectively, and quantitatively compared different flow dynamics in different microstructures for droplet merging and splitting via micro-particle image velocimetry (micro-PIV) experiments. Some flow phenomena of droplets different from previous studies were observed during merging and splitting using a high-speed microscope...
April 2017: Microfluidics and Nanofluidics
https://www.readbyqxmd.com/read/28890496/on-line-analysis-of-catalytic-reaction-products-using-a-high-pressure-tandem-micro-reactor-gc-ms
#5
Atsushi Watanabe, Young-Min Kim, Akihiko Hosaka, Chuichi Watanabe, Norio Teramae, Hajime Ohtani, Seungdo Kim, Young-Kwon Park, Kaige Wang, Robert R Freeman
When a GC/MS system is coupled with a pressurized reactor, the separation efficiency and the retention time are directly affected by the reactor pressure. To keep the GC column flow rate constant irrespective of the reaction pressure, a restrictor capillary tube and an open split interface are attached between the GC injection port and the head of a GC separation column. The capability of the attached modules is demonstrated for the on-line GC/MS analysis of catalytic reaction products of a bio-oil model sample (guaiacol), produced under a pressure of 1 to 3 MPa...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28882526/extra-foraminal-microscopic-assisted-percutaneous-nucleotomy-for-foraminal-and-extraforaminal-lumbar-disc-herniations
#6
Ahmed Shawky, Dusko Babic, Ahmed Ezzat Siam, Ali Ezzati
Background Foraminal and extraforaminal lumbar disc herniations are uncommon. The main presentation is radicular pain related to the exiting nerve root at the affected level. Different approaches for surgical intervention have been described. Purpose To evaluate the clinical outcome, complications recurrence and reoperation rate of extraforaminal microscopic assisted percutaneous nucleotomy with literature review focusing on complications and recurrence rate Study Design Prospective cohort study done in a high flow spine center in Germany Patient Sample Between October 2012 and October 2015, 76 patients (35 females and 41 males) with foraminal or extraforaminal lumbar disc prolapse were operated upon...
September 4, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28863639/in-situ-flow-cell-for-combined-x-ray-absorption-spectroscopy-x-ray-diffraction-and-mass-spectrometry-at-high-photon-energies-under-solar-thermochemical-looping-conditions
#7
Matthäus Rothensteiner, Joel Jenni, Hermann Emerich, Alexander Bonk, Ulrich F Vogt, Jeroen A van Bokhoven
An in situ/operando flow cell for transmission mode X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD), and combined XAS/XRD measurements in a single experiment under the extreme conditions of two-step solar thermochemical looping for the dissociation of water and/or carbon dioxide was developed. The apparatus exposes materials to relevant conditions of both the auto-reduction and the oxidation sub-steps of the thermochemical cycle at ambient temperature up to 1773 K and enables determination of the composition of the effluent gases by online quadrupole mass spectrometry...
August 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28841664/frequent-gene-flow-blurred-taxonomic-boundaries-of-sections-in-lilium-l-liliaceae
#8
Xun Gong, Kuo-Hsiang Hung, Yu-Wei Ting, Tsai-Wen Hsu, Lenka Malikova, Huyen Trang Tran, Chao-Li Huang, Shih-Hui Liu, Tzen-Yuh Chiang
Gene flow between species may last a long time in plants. Reticulation inevitably causes difficulties in phylogenetic reconstruction. In this study, we looked into the genetic divergence and phylogeny of 20 Lilium species based on multilocus analyses of 8 genes of chloroplast DNA (cpDNA), the internally transcribed nuclear ribosomal DNA (nrITS) spacer and 20 loci extracted from the expressed sequence tag (EST) libraries of L. longiflorum Thunb. and L. formosanum Wallace. The phylogeny based on the combined data of the maternally inherited cpDNA and nrITS was largely consistent with the taxonomy of Lilium sections...
2017: PloS One
https://www.readbyqxmd.com/read/28840770/predicting-tumor-hypoxia-in-non-small-cell-lung-cancer-by-combining-ct-fdg-pet-and-dynamic-contrast-enhanced-ct
#9
Aniek J G Even, Bart Reymen, Matthew D La Fontaine, Marco Das, Arthur Jochems, Felix M Mottaghy, José S A Belderbos, Dirk De Ruysscher, Philippe Lambin, Wouter van Elmpt
BACKGROUND: Most solid tumors contain inadequately oxygenated (i.e., hypoxic) regions, which tend to be more aggressive and treatment resistant. Hypoxia PET allows visualization of hypoxia and may enable treatment adaptation. However, hypoxia PET imaging is expensive, time-consuming and not widely available. We aimed to predict hypoxia levels in non-small cell lung cancer (NSCLC) using more easily available imaging modalities: FDG-PET/CT and dynamic contrast-enhanced CT (DCE-CT). MATERIAL AND METHODS: For 34 NSCLC patients, included in two clinical trials, hypoxia HX4-PET/CT, planning FDG-PET/CT and DCE-CT scans were acquired before radiotherapy...
August 25, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28827516/development-and-assessment-of-normothermic-machine-perfusion-preservation-for-extracorporeal-splitting-of-pig-liver
#10
Zhi-Bin Zhang, Wei Gao, Lei Liu, Yuan Shi, Ning Ma, Zhong-Yang Shen
BACKGROUND Studies have shown that normothermic machine perfusion (NMP) exerts a significant protective role for donations after cardiac death (DCD) livers and verified the effects of NMP in preservation, repair, and preoperative assessment of human donor livers. The objective of this study was to verify the effectiveness and stability of NMP system by splitting pig livers in perfusion preservation. MATERIAL AND METHODS Four healthy Ba-Ma miniature pigs were used. The livers were harvested, and then connected to the NMP system to split the livers...
August 22, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28821786/co-registration-of-ex-vivo-surgical-histopathology-and-in-vivo-t2-weighted-mri-of-the-prostate-via-multi-scale-spectral-embedding-representation
#11
Lin Li, Shivani Pahwa, Gregory Penzias, Mirabela Rusu, Jay Gollamudi, Satish Viswanath, Anant Madabhushi
Multi-modal image co-registration via optimizing mutual information (MI) is based on the assumption that intensity distributions of multi-modal images follow a consistent relationship. However, images with a substantial difference in appearance violate this assumption, thus MI directly based on image intensity alone may be inadequate to drive similarity based co-registration. To address this issue, we introduce a novel approach for multi-modal co-registration called Multi-scale Spectral Embedding Registration (MSERg)...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819665/efficient-photoelectrochemical-water-splitting-on-ultrasmall-defect-rich-taox-nanoclusters-enhanced-by-size-selected-pt-nanocluster-promoters
#12
Saurabh Srivastava, Joseph Palathinkal Thomas, Nina Heinig, Marwa Abd-Ellah, Md Anisur Rahman, Kam Tong Leung
Formation of nanoclusters has attracted a lot of attention in recent years because of their distinct properties from isolated atoms and bulk solids. Here, we focus on the catalytic properties of supported transition metal oxide nanoclusters, such as TaO2, with a well-defined size distribution below 10 nm. We show that their catalytic performance can be greatly enhanced by introducing a reaction promoter such as Pt. Different combinations of precisely size-selected, defect-rich TaOx and Pt nanoclusters are produced by a gas-phase aggregation technique in a special DC magnetron sputtering system...
August 18, 2017: Nanoscale
https://www.readbyqxmd.com/read/28815291/prognostic-value-of-atherosclerotic-burden-and-coronary-vascular-function-in-patients-with-suspected-coronary-artery-disease
#13
Roberta Assante, Wanda Acampa, Emilia Zampella, Parthiban Arumugam, Carmela Nappi, Valeria Gaudieri, Ciro Gabriele Mainolfi, Mariarosaria Panico, Mario Magliulo, Christine M Tonge, Mario Petretta, Alberto Cuocolo
PURPOSE: To evaluate the prognostic value of coronary atherosclerotic burden, assessed by coronary artery calcium (CAC) score, and coronary vascular function, assessed by coronary flow reserve (CFR) in patients with suspected coronary artery disease (CAD). METHODS: We studied 436 patients undergoing hybrid (82)Rb positron emission tomography/computed tomography imaging. CAC score was measured according to the Agatston method, and patients were categorized into three groups (0, <400, and ≥400)...
August 16, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28812466/florid-intussusceptive-like-microvascular-dysangiogenesis-in-a-preterm-lung
#14
Monique E De Paepe, Merline Kocheekkaran V Benny, Lauren Priolo, Francois I Luks, Svetlana Shapiro
The cellular mechanisms underlying the microvascular dysangiogenesis of bronchopulmonary dysplasia (chronic lung disease of the newborn) remain largely undetermined. We report unusual pulmonary vascular findings in a 27-week-gestation male newborn who died on the second day of life from intractable respiratory failure, following a pregnancy complicated by prolonged membrane rupture and persistent severe oligohydramnios. As expected, postmortem examination revealed pulmonary hypoplasia (lung/body weight ratio: 2...
September 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28802523/development-of-a-split-flow-system-for-high-precision-variable-sample-introduction-in-supercritical-fluid-chromatography
#15
Miho Sakai, Yoshihiro Hayakawa, Yasuhiro Funada, Takashi Ando, Eiichiro Fukusaki, Takeshi Bamba
In this study, we propose a novel variable sample injection system based on full-loop injection, named the split-flow sample introduction system, for application in supercritical fluid chromatography (SFC). In this system, the mobile phase is split by the differential pressure between two back pressure regulators (BPRs) after full-loop injection suitable for SFC, and this differential pressure determines the introduction rate. Nine compounds with a wide range of characteristics were introduced with high reproducibility and universality, confirming that a robust variable sample injection system was achieved...
July 25, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28801827/rapid-screening-and-identification-of-ace-inhibitors-in-snake-venoms-using-at-line-nanofractionation-lc-ms
#16
Marija Mladic, Tessa de Waal, Lindsey Burggraaff, Julien Slagboom, Govert W Somsen, Wilfried M A Niessen, R Manjunatha Kini, Jeroen Kool
This study presents an analytical method for the screening of snake venoms for inhibitors of the angiotensin-converting enzyme (ACE) and a strategy for their rapid identification. The method is based on an at-line nanofractionation approach, which combines liquid chromatography (LC), mass spectrometry (MS), and pharmacology in one platform. After initial LC separation of a crude venom, a post-column flow split is introduced enabling parallel MS identification and high-resolution fractionation onto 384-well plates...
August 11, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28801079/re-raising-muscle-flaps-a-randomised-controlled-animal-study
#17
K Bradshaw, M Wagels
BACKGROUND: In the experience of our centre, 33% of reconstructed compound lower limb injuries will need an orthopaedic revision.(1) A flap may be re-raised through numerous methods, and historically, the approach of choice has been based on the principle of protecting the vascular pedicle rather than the inset. Our aim was to determine whether a marginal versus a split approach to re-raising inferred a higher risk of flap necrosis and whether more attention should be paid to protecting the inset of the flap, particularly at the distal portion...
July 18, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28794033/ancient-evolution-and-dispersion-of-human-papillomavirus-type-58-variants
#18
Zigui Chen, Wendy C S Ho, Siaw Shi Boon, Priscilla T Y Law, Martin C W Chan, Rob DeSalle, Robert D Burk, Paul K S Chan
Human papillomavirus type 58 is found in 10-18% of cervical cancers in East Asia but rather uncommon elsewhere. The distribution and oncogenic potential of HPV58 variants appear to be heterogeneous since the E7 T20I/G63S variant is more prevalent in East Asia and confers 7-9 fold higher risk for cervical precancer and cancer. However, the underlying genomic mechanisms that explain the geographic and carcinogenic diversity of HPV58 variants are still poorly understood. In this study, we used a combination of phylogenetic analyses and bioinformatics to investigate the deep evolutionary history of HPV58 complete genome variants...
August 9, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28777744/the-effect-of-wing-flexibility-on-sound-generation-of-flapping-wings
#19
Biao Geng, Qian Xue, Xudong Zheng, Geng Liu, Yan Ren, Haibo Dong
In this study, the unsteady flow and acoustic characteristics of a three-dimensional (3D) flapping wing model of Tibicen linnei cicada at forward flight condition are numerically investigated. A single cicada wing is modelled as a membrane with prescribed motion reconstructed from high-speed videos of a live insect. The numerical solution takes a hydrodynamic/acoustic splitting approach: the flow field is solved with an incompressible Navier-Stokes flow solver based on immersed boundary method and the acoustic field is solved with linearized perturbed compressible equations (LPCEs)...
August 4, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28744688/intracranial-extradural-arachnoid-cyst-in-a-child
#20
Luyuan Li, Muhammad Ali, Arnold H Menezes, Brian J Dlouhy
INTRODUCTION: Arachnoid cysts are benign developmental anomalies of arachnoid membrane origin that can occur anywhere along the neuro-axis. They are believed to develop from the splitting or duplication of the arachnoid membrane by CSF that is trapped by a ball-valve mechanism. Intracranial arachnoid cysts have only been described as intradural lesions while spinal arachnoid cysts can be both intradural or extradural. CASE REPORT: After an extensive literature review, we report the first case of an intracranial, extradural arachnoid cyst in a 5-yearold girl...
July 25, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
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