keyword
MENU ▼
Read by QxMD icon Read
search

Sodium hydroxide

keyword
https://www.readbyqxmd.com/read/29350919/pair-distribution-function-analysis-of-structural-disorder-by-nb5-inclusion-in-ceria-evidence-for-enhanced-oxygen-storage-capacity-from-under-coordinated-oxide
#1
Craig Hiley, Helen Y Playford, Janet Fisher, Noelia Cortes Felix, David Thompsett, Reza J Kashtiban, Richard I Walton
Partial substitution of Ce4+ by Nb5+ is possible in CeO2 by co-inclusion of Na+ to balance the charge, via hydrothermal synthesis in sodium hydroxide solution. Pair distribution function analysis using reverse Monte Carlo refinement reveals that the small pentavalent substituent resides in irregular coordination positions in an average fluorite lattice, displaced away from the ideal cubic coordination towards four oxygens. This results in under-coordinated oxygen, which explains significantly enhanced oxygen storage capacity of the materials of relevance to redox catalysis used in energy and environmental applications...
January 19, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29336522/continued-root-maturation-despite-persistent-apical-periodontitis-of-immature-permanent-teeth-after-failed-regenerative-endodontic-therapy
#2
Louis M Lin, Sahng G Kim, Gabriela Martin, Bill Kahler
Three immature permanent teeth with pulp necrosis and apical periodontitis were treated with regenerative endodontic therapy (RET), which included root canal disinfection with sodium hypochlorite irrigation, intra-canal medication with calcium hydroxide paste, 17% EDTA rinse, induction of periapical bleeding into the canal, collagen matrix and MTA coronal seal, and composite resin restoration of access cavities. After different periods of follow-up, it was observed that continued root maturation, especially apical closure occurred despite persistent apical periodontitis of immature permanent teeth after failed RET...
January 16, 2018: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/29334386/organic-inorganic-hybrids-having-a-talc-like-structure-as-suitable-hosts-to-guest-a-wide-range-of-species
#3
J Brendlé
The sol-gel process involving hydrolysis and condensation reactions is an attractive way to form siloxane based hybrid materials since it is a one-step method performed under mild conditions. Organic-inorganic hybrids having a talc-like structure (TLH) can be obtained using this procedure starting from organotrialkoxysilanes having the formula R-Si(OR')3 (where R stands for an organic moiety and R' for a methyl or ethyl group) with different functionalities, an aqueous or ethanolic solution of a magnesium salt, and in some cases, an aqueous solution of sodium hydroxide...
January 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29334034/improved-exogenous-dna-uptake-in-bovine-spermatozoa-and-gene-expression-in-embryos-using-membrane-destabilizing-agents-in-icsi-smgt
#4
Esther Sánchez-Villalba, María Elena Arias, Fabiola Zambrano, Pía Loren, Ricardo Felmer
Sperm-mediated gene transfer (SMGT) is a simple, fast, and economical biotechnological tool for producing transgenic animals. However, transgene expression with this technique in bovine embryos is still inefficient due to low uptake and binding of exogenous DNA in spermatozoa. The present study evaluated the effects of sperm membrane destabilization on the binding capacity, location and quantity of bound exogenous DNA in cryopreserved bovine spermatozoa using Triton X-100 (TX-100), lysolecithin (LL) and sodium hydroxide (NaOH)...
January 15, 2018: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/29332593/facile-synthesis-crystal-structure-dft-calculation-and-biological-activities-of-4-2-fluorophenyl-3-3-methoxybenzyl-1h-1-2-4-triazol-5-4h-one-5
#5
Muhammad Saleem, Muhammad Rafiq, Yeon Ki Jeong, Dae Won Cho, Chong-Hyeak Kim, Sung-Yum Seo, Chang-Shik Choi, Seong-Karp Hong, Ki-Hwan Lee
BACKGROUND: In the past few decades, the design, synthesis and characterization of novel heterocyclic compounds with auspicious biological profile received the considerable attention of scientific community. Among them, the small and simple organic molecular backbone like triazole moiety have broad spectrum of applications in the medicinal as well as diagnostic areas. OBJECTIVE: The objective of present study was the synthesis, characterization and exploration of biological profile of 4-(2-fluorophenyl)-3-(3-methoxybenzyl)-1H-1,2,4-triazol-5(4H)-one (5)...
January 12, 2018: Medicinal Chemistry
https://www.readbyqxmd.com/read/29319514/characterization-of-bacteriocin-producing-lactic-acid-bacteria-isolated-from-native-fruits-of-ecuadorian-amazon
#6
Karina Garzón, Clara Ortega, Gabriela N Tenea
Tropical, wild-type fruits are considered biodiverse "hotspots" of microorganisms with possible functional characteristics to be investigated. In this study, several native lactic acid bacteria (LAB) of Ecuadorian Amazon showing highly inhibitory potential were identified and characterized. Based on carbohydrate fermentation profile and 16S rRNA gene sequencing, seven strains were assigned as Lactobacillus plantarum and one strain as Weissella confusa. Using agar-well diffusion method the active synthetized components released in the neutralized and hydroxide peroxide eliminated cell-free supernatant were inhibited by proteolytic enzymes, while the activity was maintained stable after the treatment with catalase, lysozyme, α-amylase and lipase suggesting their proteinaceous nature...
December 4, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/29315214/chitosan-cellulose-multifunctional-hydrogel-beads-design-characterization-and-evaluation-of-cytocompatibility-with-breast-adenocarcinoma-and-osteoblast-cells
#7
Poonam Trivedi, Tiina Saloranta-Simell, Uroš Maver, Lidija Gradišnik, Neeraj Prabhakar, Jan-Henrik Smått, Tamilselvan Mohan, Martin Gericke, Thomas Heinze, Pedro Fardim
Cytocompatible polysaccharide-based functional scaffolds are potential extracellular matrix candidates for soft and hard tissue engineering. This paper describes a facile approach to design cytocompatible, non-toxic, and multifunctional chitosan-cellulose based hydrogel beads utilising polysaccharide dissolution in sodium hydroxide-urea-water solvent system and coagulation under three different acidic conditions, namely 2 M acetic acid, 2 M hydrochloric acid, and 2 M sulfuric acid. The effect of coagulating medium on the final chemical composition of the hydrogel beads is investigated by spectroscopic techniques (ATR-FTIR, Raman, NMR), and elemental analysis...
January 9, 2018: Bioengineering
https://www.readbyqxmd.com/read/29310311/determination-of-free-and-total-sulfur-iv-compounds-in-coconut-water-using-high-resolution-continuum-source-molecular-absorption-spectrometry-in-gas-phase
#8
Michael L Oliveira, Geovani C Brandao, Jailson B de Andrade, Sergio L C Ferreira
This work proposes a method for the determination of free and total sulfur(IV) compounds in coconut water samples, using the high-resolution continuum source molecular absorption spectrometry. It is based on the measurement of the absorbance signal of the SO2 gas generate, which is resultant of the addition of hydrochloric acid solution on the sample containing the sulfating agent. The sulfite bound to the organic compounds is released by the addition of sodium hydroxide solution, before the generation of the SO2 gas...
March 1, 2018: Talanta
https://www.readbyqxmd.com/read/29258222/combinative-scouring-bleaching-and-cationization-pretreatment-of-greige-knitted-cotton-fabrics-for-facilely-achieving-salt-free-reactive-dyeing
#9
Wei Ma, Kezhan Shen, Nan Xiang, Shufen Zhang
In order to facilely achieve pretreatment and salt-free dyeing of greige knitted cotton fabrics, a combinative scouring, bleaching, and cationization pretreatment of the fabrics is designed in this study. The fabrics are first treated in a bath containing commercial scouring and bleaching agents, and then glycidyltrimethylammonium chloride (GTA) is directly added into the bath to achieve cationization of the fabrics. Utilization of the alkaline and high-temperature conditions in scouring and bleaching process, cationization can facilely proceed in a short time...
December 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29250673/eu3-doped-zno-nanostructures-advanced-characterizations-photoluminescence-and-cytotoxic-effect
#10
Bogdan Ştefan Vasile, Otilia Ruxandra Vasile, Daniela Cristina GhiŢulică, Florina Cristina Ilie, Irina Florentina Nicoară, Roxana Truşcă, Ovidiu Cristian Oprea, Vasile Adrian Surdu, Ionela Andreea Neacşu
In this work, several nanostructures (nanopowders and nanostars) of undoped and 1%, 3% and 5% europium (Eu3+)-doped ZnO have been synthesized via coprecipitation method using oxalic acid and sodium hydroxide as precipitation agents. Starting from zinc acetate and europium acetate, nanopowders were obtained by coprecipitation with oxalic acid. ZnO based nanostars were synthesized by coprecipitation of Zn2+ and Eu3+ with hydroxide ions (HO-), when zinc chloride and europium acetate were used as reagents. The structure and morphology of the as-prepared ZnO nanopowders and nanostars were investigated by X-ray diffraction and electron microscopy...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/29250371/crystal-structure-of-sodium-di-hydrogen-arsenate
#11
Joseph Ring, Lorenz Lindenthal, Matthias Weil, Berthold Stöger
Single crystals of the title compound, Na(H2AsO4), were obtained by partial neutralization of arsenic acid with sodium hydroxide in aqueous solution. The crystal structure of Na(H2AsO4) is isotypic with the phosphate analogue and the asymmetric unit consists of two sodium cations and two tetra-hedral H2AsO4- anions. Each of the sodium cations is surrounded by six O atoms of five H2AsO4- groups, defining distorted octa-hedral coordination spheres. In the extended structure, the sodium cations and di-hydrogen arsenate anions are arranged in the form of layers lying parallel to (010)...
October 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/29244761/study-of-separation-and-fouling-of-reverse-osmosis-membranes-during-model-hydrolysate-solution-filtration
#12
Olumoye Ajao, Mohamed Rahni, Mariya Marinova, Hassan Chadjaa, Oumarou Savadogo
Prehydrolysate, a dilute solution consisting mainly of pentoses, hexoses, and lesser quantities of organic acids, furfural and phenolics, is generated in the Kraft dissolving pulp process. An obstacle facing the valorization of the solution in hemicellulose biorefineries, by conversion of the sugars into bioproducts such as furfural, is the low sugar concentration. Membrane filtration is typically proposed in several hemicellulose based biorefineries for concentrating the solution, although they are usually generated using different wood species, pretreatment methods, and operating conditions...
December 15, 2017: Membranes
https://www.readbyqxmd.com/read/29241085/salting-out-assisted-liquid-liquid-extraction-coupled-with-hydrophilic-interaction-chromatography-for-the-determination-of-biguanides-in-biological-and-environmental-samples
#13
Anas Alshishani, Salizawati Muhamad Salhimi, Bahruddin Saad
A new salting-out assisted liquid-liquid extraction (SALLE) sample preparation method for the determination of the polar anti-diabetic biguanide drugs (metformin, buformin and phenformin) in blood plasma, urine and lake water samples were developed. The SALLE was performed by mixing samples (plasma (0.2mL), urine or lake water (1.0mL)) with acetonitrile (0.4mL for plasma, 0.5mL for urine or lake water), sodium hydroxide powder was then added for the phase separation. The effects of type of salting-out reagent, type of extraction solvent, volumes of acetonitrile and sample, amount of sodium hydroxide, vortexing and centrifugation times on the extraction efficiency were investigated...
December 9, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29240896/dechorionation-and-permeabilization-of-podisus-nigrispinus-heteroptera-pentatomidae-eggs-limiting-factors-for-cryopreservation
#14
Ítala Tainy Barreto Francisco Dos Santos, Júlio César Melo Poderoso, Edson José Santana Dos Santos, Genésio Tâmara Ribeiro, Jamile Fernanda Silva Cossolin, José Eduardo Serrão
Cryopreservation protocols have been developed for eggs of Diptera, Lepidoptera, and Hymenoptera; however, for Heteroptera, such as Podisus nigrispinus Dallas, 1851 (Pentatomidae), no procedures have been described yet. The objective of this study was to evaluate the processes of dechorionation and permeabilization on the viability of eggs of P. nigrispinus with different embryonic ages. In the laboratory, embryos of 24, 48, 72, and 96 h of age were submitted to sodium hydroxide, sodium hypochlorite, isopropyl, and hexane solutions for dechorionation and permeabilization...
December 12, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29236849/natural-decomposition-of-hornbeam-wood-decayed-by-the-white-rot-fungus-trametes-versicolor
#15
Maryam Karim, Mehrdad Ghodskhah Daryaei, Javad Torkaman, Reza Oladi, Mohammad Ali Tajick Ghanbary, Ehsan Bari, Nural Yilgor
The impacts of white-rot fungi on altering wood chemistry have been studied mostly in vitro. However, in vivo approaches may enable better assessment of the nature of interactions between saprotrophic fungi and host tree in nature. Hence, decayed and sound wood samples were collected from a naturally infected tree (Carpinus betulus L.). Fruiting bodies of the white rot fungus Trametes versicolor grown on the same tree were identified using rDNA ITS sequencing. Chemical compositions (cellulose and lignin) of both sound and infected wood were studied...
December 7, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29232874/alkaline-material-effects-on-roots-of-teeth
#16
REVIEW
Sowmya Shetty, Sam L Kahler, Bill Kahler
The aim of this review was to identify and analyse all studies related to the effects of alkaline materials used in dentistry on roots of teeth. The first part of the review focused on mechanical property alterations of root dentine due to sodium hypochlorite (SH) used as an irrigant solution based on MeSH (Medical Subject Heading) terms from a previous study by Pascon et al in 2009. The second part reviewed literature on calcium hydroxide (CH), mineral trioxide aggregate (MTA) and other alkaline materials used as root canal dressings or filling materials...
December 10, 2017: Materials
https://www.readbyqxmd.com/read/29231019/-simultaneous-quantitative-analysis-of-koumine-gelsemine-and-gelsenicine-in-biological-samples-by-lc-ms-ms
#17
S J Ji, W Liu
OBJECTIVES: To establish a LC-MS/MS method which is accurate and sensitive for determination of koumine, gelsemine, and gelsenicine in biological samples and to verify the method. METHODS: Strychnine was used as internal standard. Analytes in blood, urine and liver with 1% sodium hydroxide solution were extracted by ethyl acetate. Chromatographic separation was achieved on a ZORBAX SB-C₁₈ column (150 mm×2.1 mm, 5 μm), and gradient elution was performed with the buffer solution of methanol-20 mmol/L ammonium acetate (including 0...
April 2017: Fa Yi Xue za Zhi
https://www.readbyqxmd.com/read/29229459/regenerative-endodontic-procedures-among-endodontists-a-web-based-survey
#18
Jonathan Y Lee, Daniel D Kersten, Pete Mines, Thomas A Beltran
INTRODUCTION: The protocols that endodontists implement for regenerative endodontic procedures (REPs) are unknown. The aim of this study was to examine current REP protocols among practicing endodontists in the United States. METHODS: A Web-based survey was sent to 4060 active members of the American Association of Endodontists (AAE). A total of 850 participants completed the survey, representing a 20.9% response rate. RESULTS: Responses indicated 60% reported having performed REPs; most performed 1 to 3 per year...
December 8, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29221288/pleurodesis-a-comparison-of-two-sclerosing-agents-for-pleural-effusions-in-mozambique
#19
Ivo Figueiredo, Anilsa Cossa, Anila Hassane, José Sousa, Joaquim Pondo, João Teixeira, Kevan Akrami, Susannah K Graves, Atul Malhotra, Elizabete A Nunes
Background: Pleural effusions constitute one of the most frequent pathologies encountered in the pulmonary service of Maputo Central Hospital (MCH) in Mozambique. Bleomycin and talc are commonly used for pleurodesis, but cost prohibitive, therefore we aimed to retrospectively compare the efficacy and safety of sodium hydroxide (NaOH) with bleomycin for pleurodesis. Methods: Case records of pleurodesis using bleomycin and NaOH from 2002 to 2013 were reviewed. Standard of care for pleurodesis for recurrent pleural effusions at MCH was developed using the materials available...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29206139/alkaline-materials-and-regenerative-endodontics-a-review
#20
REVIEW
Bill Kahler, Nadia Chugal, Louis M Lin
Periapical health is the primary goal of endodontic treatment in mature and immature teeth. In addition, the goals of treatment of immature teeth with arrested root development include root growth to length and maturation of the apex, as well as thickening of the canal wall. These goals are valid for immature teeth that have been subjected to trauma and dental caries or that are the result of developmental anomalies that expose the tooth to the risk of pulp necrosis and consequently result in the cessation of root maturation...
December 5, 2017: Materials
keyword
keyword
10893
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"