The Experts below are selected from a list of 135 Experts worldwide ranked by ideXlab platform
Julian D. Gale - One of the best experts on this subject based on the ideXlab platform.
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Topological and geometrical characterization of zeotypes with a free software code called zeotsites: The case study of germanium location in octadecasil
Recent Advances in the Science and Technology of Zeolites and Related Materials Part B Proceedings of the 14th International Zeolite Conference, 2004Co-Authors: German Sastre, Julian D. GaleAbstract:Abstract The program ‘zeoTsites’ allows the full characterisation of the topology and geometry of three-dimensional nets based on covalent oxides where knot atoms are of tetrahedral (or higher) coordination. The coordination sequences and vertex symbols are calculated by the program, and, based on the connectivity of the Solid, Bond distances and angles are calculated provided the cell parameters and atomic positions are given. The xtl (also called bgf) format by Accelrys Inc. is required for the input file. The program lists also different mean values which are averaged according to two concepts: (i) atomic labels and (ii) crystallographic positions. The distortions introduced by Germanium in pure silica octadecasil are studied and conclusions over preferential locations are extracted from the results. The program is free for academics and can be easily served upon request to any of the authors.
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A software tool for the topological and geometrical characterization of three-dimensional frameworks
Computational Materials Science, 2003Co-Authors: German Sastre, Julian D. GaleAbstract:The software tool zeoTsites is described and its ability to characterize the topology of three-dimensional nets is analysed based on covalent oxides where knot atoms are of tetrahedral or higher coordination. For these systems, the coordination sequences and vertex symbols are calculated by the program. Based on the connectivity of the Solid, Bond distances and angles are calculated and averaged over each different crystallographic and topologic knot atom in the framework. Two case studies are presented, firstly for wadeite type minerals, and secondly for the zeolites nabesite and weinebeneite that contain the rather unusual spiro-5 unit formed from two interconnected three-membered rings. � 2003 Elsevier B.V. All rights reserved.
German Sastre - One of the best experts on this subject based on the ideXlab platform.
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Topological and geometrical characterization of zeotypes with a free software code called zeotsites: The case study of germanium location in octadecasil
Recent Advances in the Science and Technology of Zeolites and Related Materials Part B Proceedings of the 14th International Zeolite Conference, 2004Co-Authors: German Sastre, Julian D. GaleAbstract:Abstract The program ‘zeoTsites’ allows the full characterisation of the topology and geometry of three-dimensional nets based on covalent oxides where knot atoms are of tetrahedral (or higher) coordination. The coordination sequences and vertex symbols are calculated by the program, and, based on the connectivity of the Solid, Bond distances and angles are calculated provided the cell parameters and atomic positions are given. The xtl (also called bgf) format by Accelrys Inc. is required for the input file. The program lists also different mean values which are averaged according to two concepts: (i) atomic labels and (ii) crystallographic positions. The distortions introduced by Germanium in pure silica octadecasil are studied and conclusions over preferential locations are extracted from the results. The program is free for academics and can be easily served upon request to any of the authors.
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A software tool for the topological and geometrical characterization of three-dimensional frameworks
Computational Materials Science, 2003Co-Authors: German Sastre, Julian D. GaleAbstract:The software tool zeoTsites is described and its ability to characterize the topology of three-dimensional nets is analysed based on covalent oxides where knot atoms are of tetrahedral or higher coordination. For these systems, the coordination sequences and vertex symbols are calculated by the program. Based on the connectivity of the Solid, Bond distances and angles are calculated and averaged over each different crystallographic and topologic knot atom in the framework. Two case studies are presented, firstly for wadeite type minerals, and secondly for the zeolites nabesite and weinebeneite that contain the rather unusual spiro-5 unit formed from two interconnected three-membered rings. � 2003 Elsevier B.V. All rights reserved.
Anselm Petschelt - One of the best experts on this subject based on the ideXlab platform.
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Dentin Bond strength and marginal adaption after NaOCl pre-treatment.
Operative dentistry, 2000Co-Authors: Roland Frankenberger, Norbert Krämer, H. Oberschachtsiek, Anselm PetscheltAbstract:The aim of this in vitro study was to compare the dentin Bond strength and marginal adaptation of direct composite resins with and without additional NaOCl treatment after the etching process. A total of 150 cavities were prepared into disks of freshly extracted human third molars and filled with direct composite resins. Dentin adhesives of the fourth (with total etching: ScotchBond Multi-Purpose Plus, EBS, and Solid Bond), and fifth generation (one-bottle adhesives: Prime&Bond 2.1, Syntac Sprint) were used in combination with corresponding composite resin materials. Dentin disks without cavity preparation treatment served as controls. After 24 hours of storage and 24 hours of thermocycling (1150 cycles), replicas were made and push-out testing was performed. Replicas were examined regarding marginal adaptation using SEM (X200 magnification). In general, fourth-generation dentin adhesives produced better results in Bond strength and marginal adaptation than fifth-generation one-bottle systems (P < 0.05). Within the fourth generation, ScotchBond Multi-Purpose Plus and EBS achieved significantly higher push-out values and percentages of gap-free margins than Solid Bond (P < 0.05). After hypochlorite treatment, dentin Bond strength (-25%) and marginal adaptation (-30%) decreased significantly (P < 0.05) in all groups.
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Internal adaptation and overhang formation of direct Class II resin composite restorations.
Clinical oral investigations, 1999Co-Authors: Roland Frankenberger, Norbert Krämer, Matthias Pelka, Anselm PetscheltAbstract:The aim of the present in vitro study was to evaluate different restorative concepts for posterior resin composite fillings in terms of internal adaptation and overhang formation. Eighty standard occluso-distal cavities with and without a 1.5-mm bevel were restored in a phantom head using Syntac Classic and Tetric Ceram with and without Tetric Flow as thin lining or Solid Bond and Solitaire with and without FlowLine. The restorations were finished intraorally and afterwards subjected to thermal loading (1150× +5°C/+55°C) for 24 h. The proximal margins of the original specimens were analyzed for overhangs under a stereo light microscope (100-fold magnification) before and after intraoral control with loupes, including additional polish. Afterwards the teeth were cut longitudinally, replicated, and their internal integrity analyzed under a SEM (200-fold magnification). The combination of flowable and viscous composites resulted in enhanced internal adaptation for both adhesive systems. However, Syntac Classic exhibited superior adaptation characteristics compared with Solid Bond. In terms of overhang formation, the use of flowable materials always led to higher percentages of marginal overhangs in beveled cavities. Higher viscous materials alone resulted in higher percentages of underfilled margins of beveled than box-shaped cavities. It was clear that the use of magnifying glasses during finishing was beneficial for reducing marginal overhangs up to 40%.
R. B. Saudagar - One of the best experts on this subject based on the ideXlab platform.
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Sintering Method in Pharmaceutical Sciences: An Overview
International Journal of Current Pharmaceutical Review and Research, 2017Co-Authors: R. B. Saudagar, Pratik V. BidweAbstract:In the pharmaceutical science, sintering has been described as the mechanism for the strengthening of the mechanical properties of conSolidated pharmaceutical powders at elevated temperatures, for Solid-Bond formation during tablet compression, and for thermal curing of polymer-latex film coatings. The concept of sintering was applied in the investigation of the effect of heating on the mechanical properties of pharmaceutical powders. The sintering process has been used for the fabrication of controlled-release matrix tablets and for the stabilization of the drug permeability of film coatings derived from various pharmaceutical lattices. The changes in the hardness and disintegration time of tablets stored at elevated temperatures were described as a result of sintering. The formation of Solid Bonds within powder bed during tablet compression was also studied in terms of sintering. The concept of sintering was applied in the investigation of the effect of heating on the mechanical properties of pharmaceutical powders.
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A Review on Sintering Technique in Pharmaceutical Sciences
International Journal of Current Pharmaceutical Review and Research, 2017Co-Authors: Amol R. Bodke, Smita S. Aher, R. B. SaudagarAbstract:In the pharmaceutical science, sintering has been described as the mechanism for the strengthening of the mechanical properties of conSolidated pharmaceutical powders at elevated temperatures, for Solid-Bond formation during tablet compression, and for thermal curing of polymer-latex film -Coatings. The concept of sintering was applied in the investigation of the effect of heating on the mechanical properties of pharmaceutical powders. The formation of Solid Bonds within a powder bed during tablet compression was also studied in terms of sintering. The changes in the hardness and Disintegration time of tablets stored at elevated temperatures were described as a result of sintering. Furthermore, the sintering process has been used for the fabrication of sustained – release matrix tablets and for the stabilization of the drug permeability of film coatings derived from various pharmaceutical lattices.
Roland Frankenberger - One of the best experts on this subject based on the ideXlab platform.
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Dentin Bond strength and marginal adaption after NaOCl pre-treatment.
Operative dentistry, 2000Co-Authors: Roland Frankenberger, Norbert Krämer, H. Oberschachtsiek, Anselm PetscheltAbstract:The aim of this in vitro study was to compare the dentin Bond strength and marginal adaptation of direct composite resins with and without additional NaOCl treatment after the etching process. A total of 150 cavities were prepared into disks of freshly extracted human third molars and filled with direct composite resins. Dentin adhesives of the fourth (with total etching: ScotchBond Multi-Purpose Plus, EBS, and Solid Bond), and fifth generation (one-bottle adhesives: Prime&Bond 2.1, Syntac Sprint) were used in combination with corresponding composite resin materials. Dentin disks without cavity preparation treatment served as controls. After 24 hours of storage and 24 hours of thermocycling (1150 cycles), replicas were made and push-out testing was performed. Replicas were examined regarding marginal adaptation using SEM (X200 magnification). In general, fourth-generation dentin adhesives produced better results in Bond strength and marginal adaptation than fifth-generation one-bottle systems (P < 0.05). Within the fourth generation, ScotchBond Multi-Purpose Plus and EBS achieved significantly higher push-out values and percentages of gap-free margins than Solid Bond (P < 0.05). After hypochlorite treatment, dentin Bond strength (-25%) and marginal adaptation (-30%) decreased significantly (P < 0.05) in all groups.
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Internal adaptation and overhang formation of direct Class II resin composite restorations.
Clinical oral investigations, 1999Co-Authors: Roland Frankenberger, Norbert Krämer, Matthias Pelka, Anselm PetscheltAbstract:The aim of the present in vitro study was to evaluate different restorative concepts for posterior resin composite fillings in terms of internal adaptation and overhang formation. Eighty standard occluso-distal cavities with and without a 1.5-mm bevel were restored in a phantom head using Syntac Classic and Tetric Ceram with and without Tetric Flow as thin lining or Solid Bond and Solitaire with and without FlowLine. The restorations were finished intraorally and afterwards subjected to thermal loading (1150× +5°C/+55°C) for 24 h. The proximal margins of the original specimens were analyzed for overhangs under a stereo light microscope (100-fold magnification) before and after intraoral control with loupes, including additional polish. Afterwards the teeth were cut longitudinally, replicated, and their internal integrity analyzed under a SEM (200-fold magnification). The combination of flowable and viscous composites resulted in enhanced internal adaptation for both adhesive systems. However, Syntac Classic exhibited superior adaptation characteristics compared with Solid Bond. In terms of overhang formation, the use of flowable materials always led to higher percentages of marginal overhangs in beveled cavities. Higher viscous materials alone resulted in higher percentages of underfilled margins of beveled than box-shaped cavities. It was clear that the use of magnifying glasses during finishing was beneficial for reducing marginal overhangs up to 40%.