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https://www.readbyqxmd.com/read/28318233/assembly-mechanism-of-zr-containing-and-other-tm-containing-polyoxometalates
#1
Pablo Jiménez-Lozano, Albert Solé-Daura, Georges Wipff, Josep M Poblet, Alain Chaumont, Jorge J Carbó
The mechanism by which Zr-substituted and other transition metal-substituted polyoxometalates (POMs) form covalently linked dimers has been analyzed by means of static density functional theory (DFT) calculations with a continuous solvent model as well as Car-Parrinello molecular dynamics (CPMD) simulations with explicit solvent molecules. The study includes different stages of the process: the formation of the active species by alkalination of the solution and formation of intercluster linkages. CPMD simulations show that the Zr-triaqua precursor, [W5O18Zr(H2O)3](2-), under basic conditions, reacts with hydroxide anions to form Zr-aqua-hydroxo active species, [W5O18Zr(OH)(H2O)](3-)...
March 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28317662/straylight-from-glistenings-in-intraocular-lenses-in%C3%A2-vitro-study
#2
Grzegorz Łabuz, Nicolaas J Reus, Thomas J T P van den Berg
PURPOSE: To assess light scattering from intraocular lenses (IOLs) with different numbers of laboratory-induced glistenings and create a model for predicting glistening effects on straylight. SETTING: Rotterdam Ophthalmic Institute, Rotterdam, the Netherlands. DESIGN: Experimental study. METHODS: Glistenings were induced in 7 Acrysof IOLs using an accelerated aging method. To create different numbers of glistenings, the IOLs were immersed in a balanced salt solution at temperatures ranging from 37°C to 60°C and cooled to room temperature...
January 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28302213/-effects-of-embryonic-lead-exposure-on-motor-function-and-balance-ability-in-offspring-rats-and-possible-mechanisms
#3
Jian-Ping Zhou, Fan Wang, Xue-Ying Wang, Yong-Sheng Jiang, Xiao-Qing Yi
OBJECTIVE: To explore the effects of embryonic lead exposure on motor function and balance ability in offspring rats and the possible mechanisms. METHODS: An animal model of embryonic lead exposure was prepared with the use of pregnant Sprague-Dawley rats freely drinking 0.1% (low-dose group, LG) or 0.2% (high-dose group, HG) lead acetate solution. A normal control group (NG) was also set. The male offspring rats of these pregnant rats were included in the study, consisting of 12 rats in the NG group, 10 rats in the LG group, and 9 rats in the HG group...
March 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28302179/balanced-crystalloids-versus-saline-in-the-intensive-care-unit-study-protocol-for-a-cluster-randomized-multiple-crossover-trial
#4
Matthew W Semler, Wesley H Self, Li Wang, Daniel W Byrne, Jonathan P Wanderer, Jesse M Ehrenfeld, Joanna L Stollings, Avinash B Kumar, Antonio Hernandez, Oscar D Guillamondegui, Addison K May, Edward D Siew, Andrew D Shaw, Gordon R Bernard, Todd W Rice
BACKGROUND: Saline, the intravenous fluid most commonly administered to critically ill adults, contains a high chloride content, which may be associated with acute kidney injury and death. Whether using balanced crystalloids rather than saline decreases the risk of acute kidney injury and death among critically ill adults remains unknown. METHODS: The Isotonic Solutions and Major Adverse Renal Events Trial (SMART) is a pragmatic, cluster-level allocation, cluster-level crossover trial being conducted between 1 June 2015 and 30 April 2017 in five intensive care units at Vanderbilt University Medical Center in Nashville, TN, USA...
March 16, 2017: Trials
https://www.readbyqxmd.com/read/28301829/ionic-crosslinking-of-imidazolium-functionalized-poly-aryl-ether-ketone-by-sulfonated-poly-ether-ether-ketone-for-anion-exchange-membranes
#5
Yixin Xu, Niya Ye, Dengji Zhang, Jingshuai Yang, Ronghuan He
Two N3-substituted imidazoles 1,2-dimethylimidazole and 1-butyl-2-methylimidazole were chosen to functionalize poly(aryl ether ketone), respectively. The generated imidazolium cations could electrostatically react with sulfonate ions of the sulfonated poly(ether ether ketone) forming the ionic crosslinking structure of the membranes. The changes in crosslinking degree and the alkyl chain-length on N3 site of the imidazoliums could highly affect the properties of the anion exchange membranes (AEMs). The AEMs functionalized by 1-butyl-2-methylimidazole exhibited superior properties compared to those functionalized by 1,2-dimethylimidazole according to the tolerance tests of the AEMs towards hot alkaline solutions...
March 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28300744/a-modified-simple-technique-of-removing-the-lens-cortex-during-cataract-surgery
#6
Kyung Eun Han, Se Hoon Han, Dongkwon Lim, Min Chul Shin
We describe here a surgical technique of removing the remaining cortex after phacoemulsification without performing the conventional irrigation/aspiration (I/A) procedure. In this technique, the remaining cortex attached to the posterior capsule was separated and dissected into several pieces by continuous irrigation with balanced salt solution, which was supplied through a syringe attached to a bent, blunt-tip needle. Approximately, 10 s of manual irrigation separated most of the remaining cortex from the posterior capsule...
January 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28300477/evaluation-of-intracameral-pentablock-copolymer-thermosensitive-gel-for-sustained-drug-delivery-to-the-anterior-chamber-of-the-eye
#7
Elizabeth Schaefer, Sara M Smith, Jacklyn Salmon, Santhi Abbaraju, Rasidul Amin, Sidney Weiss, Ulrich Grau, Poonam Velagaleti, Brian Gilger
PURPOSE: To investigate PTSgels (Pentablock copolymers) as an injectable formulation technology for sustained ocular drug delivery. Drug release profile, tolerability, and polymer degradation for one of the thermosensitive, biodegradable, and biocompatible compositions were investigated through intracameral (IC) injection in rabbits. METHODS: New Zealand White rabbit eyes were injected IC (50 μL) with 100 μg near-infrared-immunoglobulin G (NIR-IgG) in balanced salt solution (BSS) or 20% PTSgel; or with PTSgel or BSS alone...
March 16, 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28296160/changes-in-serum-bicarbonate-levels-caused-by-acetate-containing-bicarbonate-buffered-hemodialysis-solution-an-observational-prospective-cohort-study
#8
Mandip Panesar, Neal Shah, Sarosh Vaqar, Kaushik Ivaturi, Gregory Gudleski, Mary Muscarella, Judy Lambert, Winnie Su, Brian Murray
Fresenius Medical Care's NaturaLyte dialysate has been associated with increased risk of sudden cardiac death by causing metabolic alkalosis from its acetate content based on retrospective data using pre-dialysis bicarbonate levels only. The study objective was to measure inter/intra-dialytic changes in serum bicarbonate and degree of alkalosis conferred by varying concentrations of NaturaLyte bicarbonate dialysate. Thirty-nine hemodialysis patients were divided into four groups based on prescribed bicarbonate dialysate concentrations; Group 1 (N = 9): 30-32 mEq/L, Group 2 (N = 5): 33-34 mEq/L, Group 3 (N = 10): 35-36 mEq/L, Group 4 (N = 15): 37-40 mEq/L...
March 13, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/28293275/approximating-the-dcj-distance-of-balanced-genomes-in-linear-time
#9
Diego P Rubert, Pedro Feijão, Marília Dias Vieira Braga, Jens Stoye, Fábio Henrique Viduani Martinez
BACKGROUND: Rearrangements are large-scale mutations in genomes, responsible for complex changes and structural variations. Most rearrangements that modify the organization of a genome can be represented by the double cut and join (DCJ) operation. Given two balanced genomes, i.e., two genomes that have exactly the same number of occurrences of each gene in each genome, we are interested in the problem of computing the rearrangement distance between them, i.e., finding the minimum number of DCJ operations that transform one genome into the other...
2017: Algorithms for Molecular Biology: AMB
https://www.readbyqxmd.com/read/28292596/why-biphasic-assessment-of-the-effect-on-cell-proliferation-and-expression
#10
Pierre Schembri-Wismayer, Josette Camilleri
INTRODUCTION: Tricalcium silicate (TCS)-based materials are used in endodontics because they are hydraulic and interact with blood, tissue fluids, and phosphate-based root canal irrigants, resulting in biomineralization. Newer-generation materials are biphasic; calcium phosphate is added to the TCS; thus, the material has 2 cementitious phases. The effect of this addition is not known; thus, the aim of this study was to characterize biphasic cements and assess cellular proliferation and expression...
March 11, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28290316/food-losses-shelf-life-extension-and-environmental-impact-of-a-packaged-cheesecake-a-life-cycle-assessment
#11
Michele Mario Gutierrez, Marta Meleddu, Antonio Piga
Packaging is associated with a high environmental impact. This is also the case in the food industry despite packaging being necessary for maintaining food quality, safety assurance and preventing food waste. The aim of the present study was to identify improvements in food packaging solutions able to minimize environmental externalities while maximizing the economic sustainability. To this end, the life cycle assessment (LCA) methodology was applied to evaluate the environmental performance of new packaging solutions...
January 2017: Food Research International
https://www.readbyqxmd.com/read/28290197/highly-conductive-and-uniform-alginate-silver-nanowire-composite-transparent-electrode-by-room-temperature-solution-processing-for-organic-light-emitting-diode
#12
Lu Lian, Dan Dong, Shuai Yang, Bingwu Wei, Gufeng He
A novel transparent electrode composed of Alginate/silver nanowire (AgNW) with high conductivity and low roughness is fabricated via solution process at room temperature. Sol-gel transition of the Alginate triggered by CaCl2 solution bonds the AgNWs to the substrate tightly. Meanwhile, Cl- in the solution can renovate the cracks on the AgNW surfaces created during the mechanical pressing, resulting in a great increase of the electrical conductivity. The Alginate/AgNW composite film can reach a sheet resistance of 2...
March 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28290194/inkjet-printed-photodetector-arrays-based-on-hybrid-perovskite-ch3nh3pbi3-microwires
#13
Yang Liu, Fushan Li, Chandrasekar Perumal Veeramalai, Wei Chen, Tailiang Guo, Chaoxing Wu, Tae Whan Kim
Hybrid perovskite CH3NH3PbI3 has attracted extensive research interests in optoelectronic devices in recent years. Herein, inkjet printing method has been employed to deposit a perovskite CH3NH3PbI3 layer. By choosing the proper solvent and controlling the crystal growth rate, hybrid perovskite CH3NH3PbI3 nanowires, microwires, network and islands were synthesized by means of inkjet printing. Electrode-gap-electrode lateral-structured photodetectors were fabricated with these different crystals, of which hybrid perovskite microwires-based photodetector would balance the uniformity and low defects to obtain switching ratio of 16000%, responsivity of 1...
March 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28288914/a-double-masked-randomized-trial-of-postoperative-local-anesthetic-for-pain-control-in-pediatric-strabismus-surgery
#14
Laura B Enyedi, David K Wallace, Guy de L Dear
PURPOSE: To determine to what extent local anesthetic reduces postoperative pain after pediatric strabismus surgery. METHODS: In this double-masked, randomized clinical trial of 50 children 13-91 months of age undergoing strabismus surgery, subjects were randomly assigned to one of three treatments given at the conclusion of surgery: topical lidocaine gel and sub-Tenon's (balanced salt solution) placebo (n = 16), topical placebo (hypromellose) and sub-Tenon's bupivacaine 0...
March 10, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28287098/the-redox-environment-triggers-conformational-changes-and-aggregation-of-hiapp-in-type-ii-diabetes
#15
Diana C Rodriguez Camargo, Konstantinos Tripsianes, Katalin Buday, Andras Franko, Christoph Göbl, Christoph Hartlmüller, Riddhiman Sarkar, Michaela Aichler, Gabriele Mettenleiter, Michael Schulz, Annett Böddrich, Christian Erck, Henrik Martens, Axel Karl Walch, Tobias Madl, Erich E Wanker, Marcus Conrad, Martin Hrabě de Angelis, Bernd Reif
Type II diabetes (T2D) is characterized by diminished insulin production and resistance of cells to insulin. Among others, endoplasmic reticulum (ER) stress is a principal factor contributing to T2D and induces a shift towards a more reducing cellular environment. At the same time, peripheral insulin resistance triggers the over-production of regulatory hormones such as insulin and human islet amyloid polypeptide (hIAPP). We show that the differential aggregation of reduced and oxidized hIAPP assists to maintain the redox equilibrium by restoring redox equivalents...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28286906/selection-of-cholesterol-lowering-lactic-acid-bacteria-and-its-effects-on-rats-fed-with-high-cholesterol-diet
#16
Yufang Liu, Fengchun Zhao, Jiye Liu, Huimin Wang, Xiao Han, Yongxin Zhang, Zhengyou Yang
High cholesterol level in serum is a major factor of influence for coronary heart disease. The cholesterol-lowering ability of lactic acid bacteria (LAB) without side effects makes them more and more attractive. Seventy-nine strains of LAB isolated from fermented food were screened in vitro for their ability to assimilate cholesterol. Then, ten strains which exhibited higher ability of cholesterol assimilation were investigated with the characteristics of acidic resistance, bile salt tolerance, and cell adhesion...
March 13, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28282945/optimal-power-control-in-wireless-powered-sensor-networks-a-dynamic-game-based-approach
#17
Haitao Xu, Chao Guo, Long Zhang
In wireless powered sensor networks (WPSN), it is essential to research uplink transmit power control in order to achieve throughput performance balancing and energy scheduling. Each sensor should have an optimal transmit power level for revenue maximization. In this paper, we discuss a dynamic game-based algorithm for optimal power control in WPSN. The main idea is to use the non-cooperative differential game to control the uplink transmit power of wireless sensors in WPSN, to extend their working hours and to meet QoS (Quality of Services) requirements...
March 9, 2017: Sensors
https://www.readbyqxmd.com/read/28282356/management-of-suspected-fluid-balance-issues-in-participants-of-wilderness-endurance-events
#18
Martin D Hoffman, Jeremy Joslin, Ian R Rogers
Dehydration and exercise-associated hyponatremia (EAH) are both relatively common conditions during wilderness endurance events. Whereas dehydration is treated with fluids, EAH is appropriately managed with fluid restriction and a sodium bolus but can worsen with isotonic or hypotonic fluids. Therefore, caution is recommended in the provision of postevent rehydration in environments where EAH is a potential consideration because accurate field assessment of hydration status can be challenging, and measurement of blood sodium concentration is rarely possible in the wilderness...
March 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/28280756/effect-of-four-different-media-on-periodontal-ligament-cells-viability-of-dry-stored-dog-teeth
#19
Fariborz Moazzami, Bahar Asheghi, Safoura Sahebi
STATEMENT OF THE PROBLEM: The maintenance of viable periodontal ligament cells is the most important issue in the long-term preservation of avulsed teeth. PURPOSE: The aim of this study was to assess aloe vera as a new storage media in maintaining the cell viability of dry-stored teeth in comparison with soy milk, Hank`s balanced salt solution (HBSS), and milk. MATERIALS AND METHOD: Twenty one extracted dog premolar teeth were dried for 30 minutes and stored in soy milk, HBSS, milk, and aloe vera extract (50%) for 45 minutes (n=6 for each)...
March 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28278088/sludge-granulation-in-a-uasb-moving-bed-biofilm-hybrid-reactor-for-efficient-organic-matter-removal-and-nitrogen-removal-in-biofilm-reactor
#20
Pritha Chatterjee, M M Ghangrekar, Surampalli Rao
A hybrid UASB-moving bed biofilm and rope bed biofilm (UASB-MBB-RBB) reactor was designed for treatment of sewage. In anaerobic treatment the immobilization and subsequent granulation of balanced microbial communities is essential for higher organic matter removal efficiency. Possibility of enhancing granulation in a UASB using moving media to retain sludge was explored in this study while treating low strength wastewater. Presence of media in the top portion of the UASB reactor allowed a high solid retention time even at very short hydraulic retention times and helped in maintaining selection pressure in the sludge bed to promote formation of different sized sludge granules...
March 1, 2017: Environmental Technology
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