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https://www.readbyqxmd.com/read/29036919/a-two-step-bioconversion-process-for-canolol-production-from-rapeseed-meal-combining-an-aspergillus-niger-feruloyl-esterase-and-the-fungus-neolentinus-lepideus
#1
Elise Odinot, Frédéric Fine, Jean-Claude Sigoillot, David Navarro, Oscar Laguna, Alexandra Bisotto, Corinne Peyronnet, Christian Ginies, Jérôme Lecomte, Craig B Faulds, Anne Lomascolo
Rapeseed meal is a cheap and abundant raw material, particularly rich in phenolic compounds of biotechnological interest. In this study, we developed a two-step bioconversion process of naturally occurring sinapic acid (4-hydroxy-3,5-dimethoxycinnamic acid) from rapeseed meal into canolol by combining the complementary potentialities of two filamentous fungi, the micromycete Aspergillus niger and the basidiomycete Neolentinus lepideus. Canolol could display numerous industrial applications because of its high antioxidant, antimutagenic and anticarcinogenic properties...
October 14, 2017: Microorganisms
https://www.readbyqxmd.com/read/29036462/drought-effects-on-root-and-needle-terpenoid-content-of-a-coastal-and-an-interior-douglas-fir-provenance
#2
Anita Kleiber, Qiuxiao Duan, Kirstin Jansen, Laura Verena Junker, Bernd Kammerer, Heinz Rennenberg, Ingo Ensminger, Arthur Gessler, Jürgen Kreuzwieser
Douglas fir (Pseudotsuga menziesii) is a conifer species that stores large amounts of terpenoids, mainly monoterpenoids in resin ducts of various tissues. The effects of drought on stored leaf terpenoid concentrations in trees are scarcely studied and published data are partially controversial, since reduced, unaffected or elevated terpenoid contents due to drought have been reported. Even less is known on the effect of drought on root terpenoids. In the present work, we investigated the effect of reduced water availability on the terpenoid content in roots and needles of Douglas fir seedlings...
September 19, 2017: Tree Physiology
https://www.readbyqxmd.com/read/29034625/-pilot-scale-purification-of-lipopeptide-from-marine-derived-bacillus-marinus
#3
Kangbo Gu, Cheng Guan, Jiahui Xu, Shulan Li, Yuanchan Luo, Guomin Shen, Daojing Zhang, Yuanguang Li
This research was aimed at establishing the pilot-scale purification technology of lipopeptide from marine-derived Bacillus marinus. We studied lipopeptide surfactivity interferences on scale-up unit technologies including acid precipitation, methanol extraction, solvent precipitation, salting out, extraction, silica gel column chromatography and HZ806 macroporous absorption resin column chromatography. Then, the unit technologies were combined in a certain order, to remove the impurities gradually, and to gain purified lipopeptide finally, with high recovery rate throughout the whole process...
November 25, 2016: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/29034597/effect-of-composite-type-and-placement-technique-on-cuspal-strain
#4
Vilhelm G Ólafsson, André V Ritter, Edward J Swift, Lee W Boushell, Ching-Chang Ko, Gabrielle R Jackson, Sumitha N Ahmed, Terence E Donovan
OBJECTIVE: To compare the cuspal strain in Class II restorations made with bulk-fill and conventional composite resins. MATERIALS AND METHODS: Fifty extracted maxillary premolars were mounted into phenolic rings and divided into five groups (n = 10). Specimens received standardized MOD preparations. A two-step self-etch adhesive was applied and the preparations were restored using a custom matrix as follows: Filtek Supreme Ultra in eight 2-mm increments (FSUI); Filtek Supreme Ultra in bulk (FSUB); SonicFill in bulk (SF); SureFil SDR flow in bulk, covered with a 2-mm occlusal layer of Filtek Supreme Ultra (SDR/FSU); Tetric EvoCeram Bulk Fill in bulk (TEBF)...
October 16, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29033589/yttrium-90-radioembolization-of-unresectable-hepatocellular-carcinoma-a-single-center-experience
#5
Carsten Meyer, Claus Christian Pieper, Hojjat Ahmadzadehfar, Nina Alexandra Lampe, Eva Maria E Matuschek, Thomas Adrian Maschke, Simon Jonas Enkirch, Markus Essler, Ulrich Spengler, Hans Heinz Schild
PURPOSE: To determine the value of radioembolization (RE) for treatment of unresectable hepatocellular carcinoma (HCC). PATIENTS AND METHODS: Records of patients undergoing RE for unresectable HCC were retrospectively reviewed. Biochemical and clinical toxicities, imaging response (according to modified Response Evaluation Criteria In Solid Tumors), time-to-progression (TTP) and overall survival (OS) were analyzed. Data were stratified according to clinical and procedural parameters...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29033466/silane-acrylate-chemistry-for-regulating-network-formation-in-radical-photopolymerization
#6
Johannes Steindl, Thomas Koch, Norbert Moszner, Christian Gorsche
Photoinitiated silane-ene chemistry has the potential to pave the way toward spatially resolved organosilicon compounds, which might find application in biomedicine, microelectronics, and other advanced fields. Moreover, this approach could serve as a viable alternative to the popular photoinitiated thiol-ene chemistry, which gives access to defined and functional photopolymer networks. A difunctional bis(trimethylsilyl)silane with abstractable hydrogens (DSiH) was successfully synthesized in a simple one-pot procedure...
October 10, 2017: Macromolecules
https://www.readbyqxmd.com/read/29033089/the-effect-of-heating-time-and-temperature-on-epoxy-resin-and-calcium-silicate-based-endodontic-sealers
#7
Amre R Atmeh, Emad AlShwaimi
INTRODUCTION: With the growing use of warm obturation techniques during endodontic treatment, more interest is directed toward sealers' compatibility with heat. This study aimed to evaluate the effect of heat application duration and temperature on epoxy resin- and calcium silicate-based sealers using chemical and thermogravimetric analyses. METHODS: Freshly mixed samples (n = 5/group) of each sealer were heated at 200°C or 250°C for 30 or 60 seconds. Additional 2 sets of samples were examined directly after mixing or after setting without heat exposure...
October 12, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29032826/the-effect-of-internal-roughness-and-bonding-on-the-fracture-resistance-and-structural-reliability-of-lithium-disilicate-ceramic
#8
Paul de Kok, Gabriel K R Pereira, Sara Fraga, Niek de Jager, Andressa B Venturini, Cornelis J Kleverlaan
OBJECTIVE: To evaluate the effect of internal roughness and bonding on the load to failure and structural reliability (Weibull analysis) of a lithium disilicate-based glass ceramic under different testing scenarios. METHODS: IPS e.max CAD blocks (Ivoclar Vivadent AG) were shaped into cylinders (N=100), crystalized according to the manufacturer's instructions, and randomly assigned into two surface conditions: (1) polished surface (600-grit SiC polish papers), and (2) a roughened surface (air-abrasion with 50μm Al2O3)...
October 9, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29032822/evaluation-of-the-cytotoxicity-and-biocompatibility-of-new-resin-epoxy-based-endodontic-sealer-containing-calcium-hydroxide
#9
Luciano Tavares Angelo Cintra, Francine Benetti, Índia Olinta de Azevedo Queiroz, Luciana Louzada Ferreira, Loiane Massunari, Carlos Roberto Emerenciano Bueno, Sandra Helena Penha de Oliveira, João Eduardo Gomes-Filho
INTRODUCTION: Many endodontic sealers are available, but the search for the ideal sealer continues. This study evaluated the cytotoxicity and biocompatibility of Sealer Plus, a new resin epoxy-based endodontic sealer containing calcium hydroxide. AH Plus, Endofill, and SimpliSeal endodontics sealers were used for comparison. METHODS: L929 fibroblasts were cultured, and an MTT assay was used to determine the cytotoxicity of the sealer extracts at 6, 24, 48, and 72 hours...
October 9, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29032816/physicochemical-properties-and-volumetric-change-of-silicone-bioactive-glass-and-calcium%C3%A2-silicate-based-endodontic-sealers
#10
Mario Tanomaru-Filho, Fernanda Ferrari Esteves Torres, Gisselle Moraima Chávez-Andrade, Madelise de Almeida, Luciana Guilherme Navarro, Liviu Steier, Juliane Maria Guerreiro-Tanomaru
INTRODUCTION: This study evaluated setting time (ST), radiopacity, pH, flow, solubility, and volumetric change (VC) of a silicone, gutta-percha, and bioactive glass-based sealer, GuttaFlow Bioseal (GFB), and a calcium silicate-based sealer, TotalFill BC Sealer (TFBC), in comparison with AH Plus. METHODS: ST and flow were evaluated in accordance with the ISO 6876 Standard. pH was evaluated after different time intervals (1, 3, 7, 14, 21, and 28 days). Radiopacity was evaluated by radiographic analysis in millimeters of aluminum...
October 9, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29032813/light-cured-tricalcium-silicate-toxicity-to-the-dental-pulp
#11
Charlotte Jeanneau, Patrick Laurent, Charlotte Rombouts, Thomas Giraud, Imad About
INTRODUCTION: Numerous studies reported dentin bridge formation after pulp capping with tricalcium silicates. By contrast, pulp capping with resins leads to pulp toxicity and inflammation. Hybrid materials made up of tricalcium silicates and resins have also been developed to be used in direct pulp capping. This work was designed to study the consequences of adding resins to tricalcium silicates by investigating TheraCal (BISCO, Lançon De Provence, France) and Biodentine (Septodont, Saint Maur des Fosses, France) interactions with the dental pulp...
October 9, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29032642/characterization-of-atpase-activity-of-free-and-immobilized-chromatophore-membrane-vesicles-of-rhodobacter-sphaeroides
#12
Hyeonjun Kim, Xiaomeng Tong, Sungyoung Choi, Jeong K Lee
The intracytoplasmic membrane of Rhodobacter sphaeroides readily vesiculates when cells are lysed. The resulting chromatophore membrane vesicle (CMV) contains the photosynthetic machineries to synthesize ATP by ATPase. The light-dependent ATPase activity of CMV was lowered in the presence of O₂, but the activity increased to the level observed under anaerobic condition when the reaction mixture was supplemented with ascorbic acid (> or =0.5 mM). Cell lysis in the presence of biotinyl cap phospholipid (bcp) resulted in the incorporation of bcp into membrane to form biotinylated CMV (bCMV), which binds to streptavidin resin at a ratio of approximately 24 μg bacteriochlorophyll a/ml resin...
October 14, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29031995/comparison-of-deproteinization-agents-on-bonding-to-developmentally-hypomineralized-enamel
#13
Manikandan Ekambaram, Robert P Anthonappa, Sharaschandra R Govindool, Cynthia Ky Yiu
OBJECTIVE: To compare bonding of dental adhesive to hypomineralized enamel (HE) after pre-treatment with either 5% sodium hypochlorite (NaOCl) solution or papain-based papacarie gel. METHODS: Normal enamel (NE) and HE obtained from hypomineralized first permanent molars were acid-etched with 32% phosphoric acid and randomly allocated into no deproteinization, deproteinization using 5% NaOCl, or deproteinization usping papacarie gel groups. Subsequently, the specimens were bonded, packed with composite resins and subjected to micro-shear bond strength (MSBS) testing and the data analysed using 2-way ANOVA and Tukey tests...
October 11, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29030276/dental-occlusal-surface-supported-titanium-guide-to-assist-cutting-and-drilling-in-mandibular-bilateral-sagittal-split-osteotomy
#14
Charles Savoldelli, Clair Vandersteen, Olivier Dassonville, Joseph Santini
INTRODUCTION: Cutting and drilling guides manufactured using computer-aided design/computer-aided manufacturing (CAD/CAM) technologies have attracted increasing interest in orthognathic surgery, particularly in complex cases. The development of these guides requires virtual surgery planning and three-dimensional modelling before they can be printed in titanium, polyamide, or resin. We report the use of a personalized titanium device to assist bilateral sagittal split osteotomy (BSSO) with or without genioplasty combined with individual implants for repositioning and fixation...
October 10, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29029848/fluoride-containing-bioactive-glass-composite-for-orthodontic-adhesives-ion-release-properties
#15
N A Al-Eesa, F S L Wong, A Johal, R G Hill
OBJECTIVE: Dental materials that release calcium, phosphate and fluoride ions could prevent demineralisation and/or enhance remineralisation of enamel. The objective was to develop a novel bioactive glass (BAG) resin and investigate pH changes and ion release in 3 immersion media. METHODS: Quench melt derived BAG (35.25% SiO2, 6% Na2O, 43% CaO, 5.75% P2O5, and 10% CaF2) was incorporated into a resin (42.25% BisEMA, 55% TEGDMA, 0.25% DMAEM, 0.5% camphorquinone and 2% 4-Meta), with a filler load of 80% by weight...
October 10, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29028849/the-effect-of-resin-cement-type-and-thermomechanical-aging-on-the-retentive-strength-of-custom-zirconia-abutments-bonded-to-titanium-inserts
#16
Merve Bankoğlu Gu Ngör
PURPOSE: The purpose of this study was to investigate the effect of resin cement type on the retentive strength of custom zirconia abutments bonded to titanium inserts. MATERIALS AND METHODS: Sixty implant (4.3 mm diameter and 11.5 mm length) and custom zirconia abutment (15 mm height and 2 mm wall thickness) pairs were used to form six groups (n = 10 each). Three different resin cements were used to bond the zirconia abutments and titanium inserts: Panavia F 2...
October 13, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29028596/synthesis-characterization-and-evaluation-of-a-fluorinated-resin-monomer-with-low-water-sorption
#17
Xue Liu, Zengyao Wang, Chengji Zhao, Wenhuan Bu, Yurong Zhang, Hui Na
A fluorinated acrylate monomer (4-TF-PQEA) without BPA (bisphenol-A) structure was synthesized and mixed with triethylene glycol dimethacrylate (TEGDMA) to used as dental resin system in order to achieve lower water sorption and reduce human exposure to BPA derivatives. Double bond conversion (DC) was measured using Fourier transform infrared spectroscopy (FTIR). Water sorption (WS), water solution (WL) and depth of cure (DOC) were evaluated according to ISO 4049:2009. Water contact angle (CA) was measured using contact angle analyzer...
September 21, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29027620/evaluation-of-the-tolerability-and-efficacy-of-sodium-polystyrene-sulfonate-for-long-term-management-of-hyperkalemia-in-patients-with-chronic-kidney-disease
#18
Panagiotis I Georgianos, Ioannis Liampas, Andreas Kyriakou, Vasilios Vaios, Vasilios Raptis, Nikolaos Savvidis, Athanasios Sioulis, Vassilios Liakopoulos, Elias V Balaskas, Pantelis E Zebekakis
PURPOSE: Sodium polystyrene sulfonate (SPS) is a cation-exchanging resin that has been widely used for several decades as first-line therapy of mild chronic hyperkalemia in patients with chronic kidney disease (CKD). However, evidence to prove the long-term tolerability and efficacy of SPS for the treatment of this condition is still missing. METHODS: In this retrospective, observational study, we enrolled 26 outpatients with stages 3-4 CKD who received oral therapy with low-dose SPS for mild chronic hyperkalemia in the Outpatient Nephrology clinic of our Department during 2010-2016...
October 11, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/29027526/-investigation-of-the-structure-of-a-functionally-intact-xenopericardial-bioconduit-after-long-term-implantation
#19
R A Mukhamadiyarov, N V Rutkovskaya, I V Milto, O D Sidopova, Yu А Kudryavtseva, L S Barbarash
AIM: to investigate the cellular composition of a functionally intact xenopericardial valve in a recipient with acquired mitral defect after long-term implantation. MATERIAL AND METHODS: A Uniline bioconduit (BC) ('Neocor', Kemerovo) removed from the heart in the mitral position at 7.2 years after implantation was investigated. Heart valve leaflets were fixed in a buffered 4% paraformaldehyde solution and imbedded in paraffin or epoxy resin. Slices made from the paraffin samples were stained with hematoxylin and eosin or underwent immunohistochemical (IHC) examination for typing endothelial cells, smooth muscle cells, macrophages, fibroblasts, and T and B lymphocytes...
2017: Arkhiv Patologii
https://www.readbyqxmd.com/read/29027158/isq-calculation-evaluation-of-in-vitro-laser-scanning-vibrometry-captured-resonance-frequency
#20
Stijn Debruyne, Nicolas Grognard, Gino Verleye, Korneel Van Massenhove, Dimitrios Mavreas, Bart Vande Vannet
BACKGROUND: Implant stability testing at various stages of implant therapy by means of resonance frequency analysis is extensively used. The overall measurement outcome is a function of the resulting stiffness of three entities: surrounding bone, bone-implant complex, and implant-Smartpeg complex. The influence of the latter on the overall measurement results is presently unknown. It can be investigated in vitro by use of imbedded implants with mounted Smartpegs. This enables to keep the influence of the two other entities constant and controlled...
October 12, 2017: International Journal of Implant Dentistry
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