keyword
MENU ▼
Read by QxMD icon Read
search

Resins

keyword
https://www.readbyqxmd.com/read/29150927/identification-of-proteins-drying-oils-waxes-and-resins-in-the-works-of-art-micro-samples-by-chromatographic-and-mass-spectrometric-techniques
#1
Bartłomiej Witkowski, Anna Duchnowicz, Monika Ganeczko, Agnieszka Laudy, Tomasz Gierczak, Magdalena Biesaga
Simplified method for simultaneous identification of proteins, drying oils, waxes and resins in the works-of-art samples was developed. Liquid chromatography with mass spectrometry and gas chromatography with mass spectrometry were used to identify natural materials most frequently encountered in historical paintings. Protein binders were extracted with ammonia and purified using miniaturized solid-phase microextraction (Omix tips) to efficiently suppress matrix interferences. Zwitterionic stationary phase was used for separation of sixteen underivatized amino acids analysis with hydrophilic interaction liquid chromatography that were subsequently quantified with liquid chromatography with mass spectrometry...
November 18, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/29150920/two-elution-mechanisms-of-mep-chromatography
#2
Tsutomu Arakawa, Masao Tokunaga, Takuya Maruyama, Kentarou Shiraki
MEP (mercapto-ethyl-pyridine) HyperCel is one of the hydrophobic charge induction chromatography (HCIC) resins. Under normal operation, proteins are bound to the MEP resin at neutral pH, at which MEP is not charged, mostly via hydrophobic interaction. MEP has a pyridine group, whose pK is 4.8, and hence is positively charged at acidic pH range. Based on the binding mechanism (i.e., hydrophobic interaction) and the induced positive charge at acidic pH, there may be two ways to elute the bound proteins. One way is to bring the pH down to protonate both MEP resin and the bound protein, leading to charge repulsion and thereby elution...
November 16, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/29150889/novel-aqueous-oil-in-water-emulsions-containing-extracts-of-natural-coniferous-resins-are-strongly-antimicrobial-against-enterobacteria-staphylococci-and-yeasts-as-well-as-on-bacterial-biofilms
#3
Elias Haapakorva, Thomas Holmbom, Atte von Wright
AIMS: The aim of this study was to examine the antimicrobial properties of novel aqueous natural rapeseed oil/saline emulsions containing different soluble components of spruce resin. METHODS AND RESULTS: The composition of aqueous resin emulsions was analyzed by GC-MS and their antimicrobial properties were studied with challenge tests and with turbidometric assays. The emulsions were strongly antimicrobial against common Gram-positive and Gram-negative bacteria (including MRSA) as well as common yeasts...
November 18, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29150793/high-efficient-liquid-exfoliation-of-boron-nitride-nanosheets-using-aqueous-solution-of-alkanolamine
#4
Bangwen Zhang, Qian Wu, Huitao Yu, Chaoke Bulin, He Sun, Ruihong Li, Xin Ge, Ruiguang Xing
As one of the simple and efficient routes to access two-dimensional materials, liquid exfoliation has received considerable interest in recent years. Here, we reported on high-efficient liquid exfoliation of hexagonal boron nitride nanosheets (BNNSs) using monoethanolamine (MEA) aqueous solution. The resulting BNNSs were evaluated in terms of the yield and structure characterizations. The results show that the MEA solution can exfoliate BNNSs more efficiently than the currently known solvents and a high yield up to 42% is obtained by ultrasonic exfoliation in MEA-30 wt% H2O solution...
November 17, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29150135/effect-of-different-resin-luting-cements-on-the-marginal-fit-of-lithium-disilicate-pressed-crowns
#5
Radek Mounajjed, Thomas J Salinas, Tomas Ingr, Basel Azar
STATEMENT OF PROBLEM: The vertical marginal discrepancy of restorations can increase upon cementation, and poor marginal fit can lead to cement dissolution, marginal discoloration, microleakage, and secondary caries. The amount of increase is related to the type of luting cement used, but how lithium disilicate pressed crowns are affected by different resin cements is unclear. PURPOSE: The purpose of this in vitro study was to compare the effect of using different resin luting cements on the vertical marginal discrepancy of lithium disilicate pressed crowns...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29150134/stress-generation-in-mandibular-anterior-teeth-restored-with-different-types-of-post-and-core-at-various-levels-of-ferrule
#6
Anatolii Savychuk, Marianthi Manda, Christos Galanis, Christofer Provatidis, Petros Koidis
STATEMENT OF PROBLEM: Pertinent evidence regarding the mechanical integrity of mandibular anterior teeth restored with a post-and-core is limited. PURPOSE: The purpose of this finite element analysis study was to compare the impact of the post type (glass fiber post-and-resin core or cast post-and-core) along with the ferrule effect on the stress fields generated in endodontically treated mandibular lateral incisors and canines. MATERIAL AND METHODS: Three-dimensional models of the segmented mandible were developed...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29150132/prosthodontic-rehabilitation-with-monolithic-multichromatic-cad-cam-complete-overdentures-in-an-adolescent-patient-with-ectodermal-dysplasia-a-clinical-report
#7
Hussain D Alsayed, Nasser M Alqahtani, Yasmin M Alzayer, Dean Morton, John A Levon, Nadim Z Baba
Ectodermal dysplasia is a rare, hereditary, congenital disease that affects the normal development of certain tissues and structures of ectodermal origin. The disease is manifested to different degrees of severity and may involve the nose, eyes, hair, nails, sweat glands, and enamel. This report describes a 14-year-old boy with ectodermal dysplasia, rehabilitated with monolithic, multichromatic maxillary and mandibular computer-aided design and computer-aided manufacturing (CAD-CAM) acrylic resin complete overdentures...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29150020/inconclusive-evidence-about-the-effects-of-resin-viscosity-for-resin-composite-restorations-in-noncarious-cervical-lesions
#8
Tahira Devji
No abstract text is available yet for this article.
November 11, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/29149442/assessment-of-the-relative-contribution-of-volume-and-concentration-changes-in-yttrium-90-labelled-resin-microspheres-on-ionization-chamber-measurements
#9
Nicholas Forwood, Kathy P Willowson, Michael Tapner, Dale L Bailey
No abstract text is available yet for this article.
November 17, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29148914/marginal-gap-formation-in-approximal-bulk-fill-resin-composite-restorations-after-artificial-ageing
#10
A Peutzfeldt, S Mühlebach, A Lussi, S Flury
The aim of this in vitro study was to investigate the marginal gap formation of a packable "regular" resin composite (Filtek Supreme XTE [3M ESPE]) and two flowable "bulk fill" resin composites (Filtek Bulk Fill [3M ESPE] and SDR [DENTSPLY DeTrey]) along the approximal margins of Class II restorations. In each of 39 extracted human molars (n=13 per resin composite), mesial and distal Class II cavities were prepared, placing the gingival margins below the cemento-enamel junction. The cavities were restored with the adhesive system OptiBond FL (Kerr) and one of the three resin composites...
November 17, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/29148913/using-cross-polarized-photography-as-a-guide-for-selecting-resin-composite-shade
#11
C A Villavicencio-Espinoza, M H Narimatsu, A Y Furuse
The restoration of single discolored maxillary anterior teeth is still a difficult task, as not only shape and surface characterization play an important role in the success of the treatment, but the propagation of light throughout the restorative material does as well. In some cases, small changes in morphology, color, and brightness will be noticeable. These factors are sometimes very tricky, and shade guides alone are difficult to use for color selection. This article proposes a protocol of employing cross-polarization imaging for improving the accuracy of the shade selection of resin composites...
November 17, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/29148912/influence-of-different-restoration-techniques-on-fracture-resistance-of-root-filled-teeth-in-vitro-investigation
#12
M E Hshad, E E Dalkılıç, G C Ozturk, I Dogruer, F Koray
OBJECTIVE: The purpose of this study was to determine the fracture strength of endodontically treated mandibular premolar teeth restored with composites and different reinforcement techniques. METHODS AND MATERIALS: Forty-eight freshly extracted human mandibular premolar teeth were randomly divided into four groups: group IN, group CR, group FRC, and group PRF. Group IN consisted of teeth with intact crowns and served as the control group. In the other three groups, endodontic treatment was performed and standard mesio-occluso-distal (MOD) cavities were prepared...
November 17, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/29148599/hierarchical-porous-phenolic-resin-and-its-supported-pd-catalyst-for-suzuki-miyaura-reactions-in-water-medium
#13
Gaoyang Deng, Zhonggang Wang
The motivation of this work is to build micro and mesopores within phenolic resins to extend their applications to the heterogeneous catalysis field. For this purpose, porous hyper-cross-linked phenolic resin (PFN-P) with Brunauer-Emmett-Teller (BET) surface area of 775 m(2) g(-1) is synthesized through one-step polycondensation from tri(4-formylphenyl)phosphine and 2,5-dihydroxy-1,4-benzoquinone, which simultaneously contains abundant hydroxyl and triphenylphosphine moieties in the network. The resultant palladium-coordinated Pd@PFN-P possesses hierarchical porous structure with pore sizes ranging from 1...
November 17, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29148428/-sup-135-sup-la-as-an-auger-electron-emitter-for-targeted-internal-radiotherapy
#14
Jesper Fonslet, Boon Quan Lee, Thuy A Tran, Mattia Siragusa, Mikael Jensen, Tibor Kibedi, Andrew E Stuchbery, Gregory W Severin
<b>Introduction:</b> <sup>135</sup>La has favorable nuclear and chemical properties for Auger-based targeted internal radiotherapy. Here we present detailed investigations of the production, emissions, imaging characteristics, and dosimetry related to <sup>135</sup>La therapy. <b>Methods and Results:</b> <sup>135</sup>La was produced by 16.5 MeV proton irradiation of metallic <sup>nat</sup>Ba on a medical cyclotron, and was isolated and purified by trap-and-release on weak cation-exchange resin...
November 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29148271/high-refractive-index-of-acrylate-embedding-resin-clarifies-mouse-brain-tissue
#15
Hongfu Zhou, Yumiao Xiong, Yu Wang, Xiaojun Wang, Pei Li, Yadong Gang, Xiuli Liu, Shaoqun Zeng
Biological tissue transparency combined with light-sheet fluorescence microscopy is a useful method for studying the neural structure of biological tissues. The development of light-sheet fluorescence microscopy also promotes progress in biological tissue clearing methods. The current clarifying methods mostly use liquid reagent to denature protein or remove lipids first, to eliminate or reduce the scattering index or refractive index of the biological tissue. However, denaturing protein and removing lipids require complex procedures or an extended time period...
November 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29148238/use-of-resin-based-provisional-material-to-create-the-posterior-palatal-seal-in-complete-denture-definitive-impressions
#16
Victor Eduardo de Souza Batista, Aljomar José Vechiato-Filho, Eduardo Piza Pellizzer, Fellippo Ramos Verri
The purpose of this article was to present an alternative procedure using resin-based provisional material to create the posterior palatal seal (PPS). This method offers more practicality in clinical routine and increased control for addition of material to create the PPS when compared to traditional techniques such as the use of impression wax.
November 17, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29144874/evaluation-of-interfacial-gap-volume-of-two-low-shrinkage-composites-using-micro-computed-tomography
#17
Hna Al Nahedh, N S Sibai
OBJECTIVES: To investigate the efficacy of X-ray micro-computed tomography (μCT) in the detection and quantification of interfacial gap formation in standardized Class I and Class II resin composite restorations, to compare the interfacial gaps for two low-shrinkage resin composites with a methacrylate composite material, and to determine any correlation between the cavity configuration factor (C-factor) and the volume of gaps formed. METHODS AND MATERIALS: Sixty standardized Class I and Class II cavities were prepared and divided into six groups...
November 2017: Operative Dentistry
https://www.readbyqxmd.com/read/29144302/fouling-mitigation-in-anaerobic-membrane-bioreactors-using-fluidized-resin-beads
#18
B Düppenbecker, J Behnisch, M Engelhart, P Cornel
This study focuses on the use of fluidized resin beads to mitigate fouling during ultrafiltration (UF) of the effluent of an anaerobic bioreactor. Two different module configurations were tested: A fluidized bed of resin beads was generated in a tubular UF membrane, and a hollow fiber (HF) UF membrane was submerged into a fluidized bed, respectively. During filtration of anaerobically treated synthetic wastewater using the tubular module, fluidized resin beads with a diameter of 0.5-0.71 mm did not show any beneficial effect...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29144291/effective-adsorption-of-nitroaromatics-at-the-low-concentration-by-a-newly-synthesized-hypercrosslinked-resin
#19
Chuanhong Wang, Chao Xu, Weizhi Sun, Fusheng Liu, Shitao Yu, Mo Xian
In the present study, a series of hypercrosslinked resins (CH series) was prepared in systematically designed conditions for the adsorption of nitroaromatics from aqueous solution. The newly synthesized CH-10 possesses a Brunauer-Emmett-Teller (BET) surface area up to 1,329.3 m(2)/g which is larger than that of the widely used hypercrosslinked resin H-103 and it exhibits great advantage over H-103 when subjected to nitrobenzene at low concentrations. The adsorption capacity of CH-10 for nitrobenzene is 1.4 times as much as that of H-103 at the concentration of 100 mg/L...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29144019/pegylated-precision-segments-based-on-sequence-defined-thiolactone-oligomers
#20
Sensu Celasun, Filip E Du Prez, Hans G Börner
A straightforward access route to multifunctional block copolymers, combining a poly(ethylene glycol) (PEG) block and a monodisperse segment with discrete monomer sequence based on thiolactone chemistry, is described. Exploiting an inverse conjugation strategy on a PEG preloaded poly(styrene) synthesis resin enables the convenient introduction of a predefined PEG-block at the α-terminus of thiolactone-based sequence-defined oligomers. Reaction conditions for the stepwise, submonomer synthesis at polar solid supports are optimized, using sequential synthesis on a model resin that enables to isolate and determine the purity of the oligomer segments by liquid chromatography-electrospray ionization mass spectrometry analysis...
November 16, 2017: Macromolecular Rapid Communications
keyword
keyword
49265
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"