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https://www.readbyqxmd.com/read/28211878/pre-descemets-endothelial-keratoplasty-the-pdek-clamp-for-successful-pdek
#1
H S Dua, D G Said
PurposeTo design and produce a clamp that enables good handling of donor sclera-corneal disks, allows air to be injected in the corneal stroma and consistently provides pre-Descemets endothelial keratoplasty (PDEK) tissue by creation of a type-1 big bubble (BB) avoiding a type-2BB by shutting the fenestrations in the periphery of the pre-Descemets layer and preventing escape of air.Patients and methodsA clamp with spring loaded handles attached to two rings of 9 mm diameter and 1 mm width with a side port for insertion of a needle for air injection was designed and produced...
February 17, 2017: Eye
https://www.readbyqxmd.com/read/28192584/laser-assisted-capsulotomy-centration-a-prospective-trial-comparing-pupil-versus-oct-based-scanned-capsule-centration
#2
Tim Schultz, Nikolaos Tsiampalis, H Burkhard Dick
PURPOSE: To investigate different capsulotomy centration methods for femtosecond laser-assisted cataract surgery. The overlap between intraocular lens (IOL) optic and lens capsule was measured with different centration methods and IOL types. METHODS: This was a prospective randomized clinical trial. Patients with cataract scheduled for femtosecond laser-assisted cataract surgery were assigned to one of four treatment groups: optical coherence tomography (OCT)-based scanned capsule centration (SCC) and three-piece IOL (SCC with three-piece IOL); scanned capsule centration and plate-haptic IOL (SCC with plate-haptic IOL); pupil centration (PC) and three-piece IOL (PC with three-piece IOL); or PC and plate-haptic IOL (PC with plate-haptic IOL)...
February 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28192355/enhancement-of-struvite-pellets-crystallization-in-a-full-scale-plant-using-an-industrial-grade-magnesium-product
#3
D Crutchik, N Morales, J R Vázquez-Padín, J M Garrido
A full-scale struvite crystallization system was operated for the treatment of the centrate obtained from the sludge anaerobic digester in a municipal wastewater treatment plant. Additionally, the feasibility of an industrial grade Mg(OH)2 as a cheap magnesium and alkali source was also investigated. The struvite crystallization plant was operated for two different periods: period I, in which an influent with low phosphate concentration (34.0 mg P·L(-1)) was fed to the crystallization plant; and period II, in which an influent with higher phosphate concentration (68...
February 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28160780/pilot-scale-evaluation-of-ph-based-control-of-single-stage-deammonification-processes-for-sidestream-treatment
#4
David M Graham, Domènec Jolis
  Pilot scale sidestream reactors, utilizing a pH-based control strategy, were operated at the San Francisco Public Utilities Commission (SFPUC), Southeast Plant (SEP) for the biological treatment of anaerobically digested sludge centrate using combined partial nitritation/anaerobic ammonium oxidation (anammox) as the main nitrogen removal pathway. Reactors were setup to functionally simulate two full-scale commercial processes common to the industry using nonproprietary, flexible, pH-based process control strategy...
February 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28128945/biomimetic-chirality-sensing-with-pyridoxal-5-phosphate
#5
Samantha L Pilicer, Pegah R Bakhshi, Keith W Bentley, Christian Wolf
Pyridoxal-5'-phosphate (PLP) is introduced to a biomimetic indicator displacement assay for simultaneous determination of the absolute configuration, enantiomeric composition and concentration of unprotected amino acids, amino alcohols and amines. The chiroptical assay is based on fast imine metathesis with a PLP aryl imine probe to capture the target compound for circular dichroism and fluorescence sensing analysis. The substrate binding yields characteristic Cotton effects that provide information about the target compound ee and the synchronous release of the indicator results in a nonenantioselective off-on fluorescence response that is independent of the enantiomeric sample composition and readily correlated to the total analyte concentration...
January 30, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28126613/centrifuge-separation-effect-on-bacterial-indicator-reduction-in-dairy-manure
#6
Zong Liu, Zachary S Carroll, Sharon C Long, Aicardo Roa-Espinosa, Troy Runge
Centrifugation is a commonly applied separation method for manure processing on large farms to separate solids and nutrients. Pathogen reduction is also an important consideration for managing manure. Appropriate treatment reduces risks from pathogen exposure when manure is used as soil amendments or the processed liquid stream is recycled to flush the barn. This study investigated the effects of centrifugation and polymer addition on bacterial indicator removal from the liquid fraction of manure slurries. Farm samples were taken from a manure centrifuge processing system...
January 23, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28106890/assessment-of-a-new-hydrophilic-acrylic-supplementary-iol-for-sulcus-fixation-in-pseudophakic-cadaver-eyes
#7
N Reiter, L Werner, J Guan, J Li, K T Tsaousis, N Mamalis, S Srinivasan
PurposeManagement of refractive errors after cataract surgery includes spectacles or contact lens, secondary laser vision correction, intraocular lens (IOL) exchange, or piggyback lens implantation. We evaluated for the first time a single-piece hydrophilic acrylic IOL designed for supplementary sulcus fixation in postmortem pseudophakic human eyes.MethodsPseudophakic human cadaver eyes were imaged by anterior segment optical coherence tomography (AS-OCT) to assess position of the primary IOL. Eyes were prepared as per the Miyake-Apple technique...
January 20, 2017: Eye
https://www.readbyqxmd.com/read/28094949/how-high-concentrations-of-proteins-stabilize-the-amorphous-state-of-calcium-orthophosphate-a-solid-state-nuclear-magnetic-resonance-nmr-study-of-the-casein-case
#8
Paulo De Sa Peixoto, Juliana V C Silva, Guillaume Laurent, Marc Schmutz, Daniel Thomas, Antoine Bouchoux, Geneviève Gésan-Guiziou
Understanding how proteins stabilize amorphous calcium ortho-phosphate (ACP) phases is of great importance in biology and for pharmaceutical or food applications. Until now, most of the former investigations about ACP-protein stability and equilibrium were performed under conditions where ACP colloidal nanoclusters are surrounded by low to moderate concentrations of peptides or proteins (15-30 g L(-1)). As a result, the question of ACP-protein interactions in highly concentrated protein systems has clearly been overlooked, whereas it corresponds to actual industrial conditions such as drying or membrane filtration in the dairy industry for instance...
January 30, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28088723/discovery-and-metagenomic-analysis-of-an-anammox-bacterial-enrichment-related-to-candidatus-brocadia-caroliniensis-in-a-full-scale-glycerol-fed-nitritation-denitritation-separate-centrate-treatment-process
#9
Hongkeun Park, Ariane C Brotto, Mark C M van Loosdrecht, Kartik Chandran
A distinctive red biofilm was observed in a glycerol-fed digester liquid effluent treatment process coupling partial nitrification (nitritation) and partial denitrification (denitritation) processes. Based on initial phylogenetic screening using 16S rRNA clone libraries and quantitative polymerase chain reaction, the biofilm was enriched in novel anaerobic ammonium oxidizing bacteria (AMX/anammox) closely related to Candidatus "Brocadia caroliniensis". The metabolic functionality of the C. "Brocadia caroliniensis" enrichment was further explored using high-throughput sequencing and de novo metagenome assembly...
January 6, 2017: Water Research
https://www.readbyqxmd.com/read/28056173/self-assembly-and-viscosity-behavior-of-janus-nanoparticles-in-nanotube-flow
#10
Yusei Kobayashi, Noriyoshi Arai
Janus nanoparticles (JNPs) have received considerable attention because of their characteristic physical properties that are due to more than two distinct chemical or physical surfaces. We investigated the rheological properties of a JNP solution in the nanotubes using a computer simulation. Prediction and control of the self-assembly of colloidal nanoparticles is of critical importance in materials chemistry and engineering. Herein, we show computer simulation evidence of a new type of velocity profile and a hallmark shear-thinning behavior by confining a JNP solution to a nanotube with hydrophobic and hydrophilic wall surfaces...
January 12, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28013140/assessment-of-municipal-wastewaters-at-various-stages-of-treatment-process-as-potential-growth-media-for-chlorella-sorokiniana-under-different-modes-of-cultivation
#11
Prathana Ramsundar, Abhishek Guldhe, Poonam Singh, Faizal Bux
Wastewater utilization for microalgal biomass production is potentially the most economical route for its fuel and feed applications. In this study, suitability of various wastewater streams within a domestic wastewater treatment plant was evaluated for microalgal cultivation. Pre-treatment methods were evaluated to minimize bacterial load. Biomass, cell physiology, nutrient removal efficiencies and biochemical constituents of Chlorella sorokiniana were investigated in influent (INF) and anaerobic tank centrate (AC) under mixotrophic (Mixo) and heterotrophic (Hetero) cultivation...
March 2017: Bioresource Technology
https://www.readbyqxmd.com/read/27867658/man-versus-machine-software-training-for-surgeons-an-objective-evaluation-of-human-and-computer-based-training-tools-for-cataract-surgical-performance
#12
Nizar Din, Phillip Smith, Krisztina Emeriewen, Anant Sharma, Simon Jones, James Wawrzynski, Hongying Tang, Paul Sullivan, Silvestro Caputo, George M Saleh
This study aimed to address two queries: firstly, the relationship between two cataract surgical feedback tools for training, one human and one software based, and, secondly, evaluating microscope control during phacoemulsification using the software. Videos of surgeons with varying experience were enrolled and independently scored with the validated PhacoTrack motion capture software and the Objective Structured Assessment of Cataract Surgical Skill (OSACCS) human scoring tool. Microscope centration and path length travelled were also evaluated with the PhacoTrack software...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/27843291/a-new-endocapsular-open-ring-for-prevention-of-anterior-and-posterior-capsule-opacification
#13
Ioannis G Pallikaris, Nela R Stojanovic, Harilaos S Ginis
PURPOSE: The aim of this study is to demonstrate the functionality of a new design of a thick endocapsular open ring for prevention of anterior capsule opacification (ACO) and posterior capsule opacification (PCO). SETTING: The Institute of Vision and Optics, University of Crete and University Hospital of Heraklion, Crete, Greece. DESIGN: Prospective, interventional pilot study. METHODS: Fifteen patients (17 eyes) underwent cataract surgery with phacoemulsification...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27828894/rotationally-asymmetric-multifocal-intraocular-lenses-preoperative-considerations-and-postoperative-outcomes
#14
REVIEW
Jonathan E Moore, Richard N McNeely, Eric E Pazo, Tara C B Moore
PURPOSE OF REVIEW: The manuscript presents a review of recently published studies reporting objective and subjective outcomes and preoperative considerations of asymmetrical multifocal intraocular lenses (IOLs). RECENT FINDINGS: Current publications suggest that asymmetrical multifocal IOLs provide good, distance, intermediate and near vision for cataract and clear lens extraction patients. The contrast sensitivity achieved is similar to monofocal IOLs. Photopic phenomenon such as glare and halos has been reduced through the use of these IOLs leading to better patient satisfaction...
January 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/27818792/smile-and-wavefront-guided-lasik-out-compete-other-refractive-surgeries-in-ameliorating-the-induction-of-high-order-aberrations-in-anterior-corneal-surface
#15
Min-Jie Ye, Cai-Yuan Liu, Rong-Feng Liao, Zheng-Yu Gu, Bing-Ying Zhao, Yi Liao
Purpose. To compare the change of anterior corneal higher-order aberrations (HOAs) after laser in situ keratomileusis (LASIK), wavefront-guided LASIK with iris registration (WF-LASIK), femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK), and small incision lenticule extraction (SMILE). Methods. In a prospective study, 82 eyes underwent LASIK, 119 eyes underwent WF-LASIK, 88 eyes underwent FS-LASIK, and 170 eyes underwent SMILE surgery. HOAs were measured with Pentacam device preoperatively and 6 months after surgery...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/27752608/troponin-assay-use-in-the-emergency-department-for-management-of-patients-with-potential-acute-coronary-syndrome-current-use-and-future-directions
#16
William R Fox, Deborah B Diercks
Troponins are proteins commonly found in cardiac tissue that are released during myocardial ischemia or necrosis. These troponins can be detected by assays that can then be used to guide clinical decision-making and disposition, especially if the suspected insult is related to acute coronary syndrome. Timing of troponin measurement can be important as elevations may not be detectible immediately after an insult. New assays have been designed to detect troponin con-centrations previously too low to be detected by conventional assays...
March 2016: Clinical and Experimental Emergency Medicine
https://www.readbyqxmd.com/read/27733624/stronger-net-posterior-cortical-forces-and-asymmetric-microtubule-arrays-produce-simultaneous-centration-and-rotation-of-the-pronuclear-complex-in-the-early-caenorhabditis-elegans-embryo
#17
Valerie C Coffman, Matthew B A McDermott, Blerta Shtylla, Adriana T Dawes
Positioning of microtubule-organizing centers (MTOCs) incorporates biochemical and mechanical cues for proper alignment of the mitotic spindle and cell division site. Current experimental and theoretical studies in the early Caenorhabditis elegans embryo assume remarkable changes in the origin and polarity of forces acting on the MTOCs. These changes must occur over a few minutes, between initial centration and rotation of the pronuclear complex and entry into mitosis, and the models do not replicate in vivo timing of centration and rotation...
November 7, 2016: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/27722751/continuous-curvilinear-capsulorhexis-performed-with-the-verus-ophthalmic-caliper
#18
Malik Y Kahook, Robert J Cionni, Michael J Taravella, Robert E Ang, Aaron N Waite, Jonathan D Solomon, Harvey S Uy
PURPOSE: To compare size, circularity, and centration outcomes of continuous curvilinear capsulorhexis (CCC) performed with or without assistance from the VERUS ophthalmic caliper (Mile High Ophthalmics, Denver, CO). METHODS: This was a multicenter retrospective consecutive case controlled series review. RESULTS: Data from 40 consecutive cases using the VERUS device for CCC were compared to 40 consecutive cases with standard manual CCC. VERUS-assisted CCC size, circularity, and centration were closer to target compared to that of manual only procedures (P < ...
October 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27648002/regulatory-snps-alter-the-gene-expression-of-diabetic-retinopathy-associated-secretary-factors
#19
Chian-Feng Chen, Shiow-Wen Liou, Hsin-Han Wu, Chin-Hui Lin, Li-Shan Huang, Lin-Chung Woung, Ching-Yao Tsai
OBJECTIVES: Diabetic retinopathy (DR) is a common microvascular complication in both type I and type II diabetes. Several previous reports indicated the serum centration of some secretary factors were highly associated with DR. Therefore, we hypothesis regulatory SNPs (rSNPs) genotype in secretary factors may alter these gene expression and lead to DR. METHODS: At first, pyrosequencing were applying to screen the SNPs which present allele frequency different in DR and DNR...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/27643707/tunable-substrate-wettability-by-thin-water-layer
#20
Felipe Jimenez-Angeles, Abbas Firoozabadi
In oil-water-mineral substrate systems we show that the contact angle can be tuned by an ionic structure in the water layer confined between an oil droplet and the sub strate. We perform molecular dynamics simulations of a complex oil droplet in an NaCl aqueous solution on mica surface; the oil is a mixture of n-decane and surfac tant molecules. The surfactant head contains an OH group and an aromatic ring. A thin water layer between the oil droplet and the substrate and ionic stratification regulate the wetting behavior...
September 19, 2016: Journal of Physical Chemistry. B
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