The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform
Francis Baillet - One of the best experts on this subject based on the ideXlab platform.
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Thermodynamic approach to the Vaporization and growth phenomena of SiC ceramics. I. SiC and SiC-SiO2 mixtures under neutral conditions.
Journal of the European Ceramic Society, 2012Co-Authors: G. Honstein, C. Chatillon, Francis BailletAbstract:Matter transport by Vaporization and condensation processes during sintering or consolidation of SiC components at high temperature is analysed using thermodynamics of the binary Si-C and ternary Si-C-O systems. The erosion flows due to Vaporization and the potential growth flow of SiC are calculated in order to determine the conditions prevailing at the surface of SiC powder grains. Pure SiC Vaporization leads to rapid precipitation of carbon at the SiC surface. Vaporization of SiC-SiO2 mixtures under neutral atmospheric conditions or absolute vacuum contributes to the rapid departure of any Si or C impurities first of all, and then silica according to congruent Vaporization in the SiC-SiO2 pseudo-binary system. The calculated SiC growth rate by vapour transport is always less than the erosion rate and further subsequent growth of pure SiC cannot be obtained as long as silica co-exists with SiC. (C) 2011 Elsevier Ltd. All rights reserved.
Reza S Malek - One of the best experts on this subject based on the ideXlab platform.
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photoselective Vaporization prostatectomy experience with a novel 180 w 532 nm lithium triborate laser and fiber delivery system in living dogs
The Journal of Urology, 2011Co-Authors: Reza S Malek, Hyun Wook Kang, Yihlih Steven Peng, Douglas G Stinson, Michael T Beck, Ed KoullickAbstract:Purpose: We studied Vaporization parameters, and anatomical and histopathological outcomes of photoselective Vaporization of the prostate with the novel GreenLight™ XPS™ 180 W, 532 nm lithium triborate laser and MoXy™ fiber in a survival model of living dogs. We compared these findings with those of the existing GreenLight HPS™ 120 W 532 nm lithium triborate laser photoselective Vaporization of the prostate in living dogs.Materials and Methods: Eight dogs underwent antegrade photoselective Vaporization of the prostate with the 180 W laser delivered through a new 750 μm (vs the existing 600 μm core diameter), 50% larger, spot sized, side firing fiber. Four dogs were sacrificed 3 hours and 8 weeks postoperatively, respectively. We recorded laser energy and time. Prostates were sectioned, measured and histologically analyzed after hematoxylin and eosin, triphenyltetrazolium chloride or Gomori trichrome staining and compared with a normal control.Results: Photoselective Vaporization of the prostate with the 1...
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potassium titanyl phosphate laser Vaporization of the prostate a comparative functional and pathologic study in canines
Urology, 1996Co-Authors: Randall S Kuntzman, Reza S Malek, David M Barrett, David G BostwickAbstract:Objectives. We compared the functional and pathologic results of potassium-titanyl-phosphate (KTP) laserVaporization prostatectomy with those of neodymium:yttrium-aluminum-garnet (Nd:YAG) laser Vaporization and coagulation prostatectomy in dogs. Methods. The prostates of 41 dogs were treated with KTP laser Vaporization (n=21), Nd:YAG laser Vaporization (n=10), or Nd:YAG laser coagulation (n=10). Dogs were sacrificed 2 days or 8 weeks after treatment. Prostates were weighed, measured, serially sectioned, and whole-mounted for histologic analysis. Results. All techniques were hemostatic, and no irrigant absorption was detected. KTP laser Vaporization produced a prostatic defect with a mean diameter of 3.0 and 2.4 cm at 2 days and 8 weeks postoperatively, respectively. Smaller defects (P<0.0005 at 2 days and P<0.02 at 8 weeks) were produced by Nd:YAG laser Vaporization (2.0 and 1.4 cm, respectively) and coagulation (0.5 and 0.9 cm, respectively). No dog treated with KTP laser Vaporization was incontinent or developed urinary retention, including 5 dogs whose urethral catheters were removed within 24 hours of surgery. Conclusions. KTP laser Vaporization prostatectomy not only provides hemostasis similar to that obtainedwith Nd:YAG laser coagulation, but also removes tissue at the time of operation, allowing dogs to void without straining within 24 hours of treatment. In addition, the procedure is technically simple, and the operator has excellent control over exactly which tissue is removed and which is left intact. These findings suggest that KTP laser Vaporization may be useful in the treatment of human benign prostatic hyperplasia.
G. Honstein - One of the best experts on this subject based on the ideXlab platform.
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Thermodynamic approach to the Vaporization and growth phenomena of SiC ceramics. I. SiC and SiC-SiO2 mixtures under neutral conditions.
Journal of the European Ceramic Society, 2012Co-Authors: G. Honstein, C. Chatillon, Francis BailletAbstract:Matter transport by Vaporization and condensation processes during sintering or consolidation of SiC components at high temperature is analysed using thermodynamics of the binary Si-C and ternary Si-C-O systems. The erosion flows due to Vaporization and the potential growth flow of SiC are calculated in order to determine the conditions prevailing at the surface of SiC powder grains. Pure SiC Vaporization leads to rapid precipitation of carbon at the SiC surface. Vaporization of SiC-SiO2 mixtures under neutral atmospheric conditions or absolute vacuum contributes to the rapid departure of any Si or C impurities first of all, and then silica according to congruent Vaporization in the SiC-SiO2 pseudo-binary system. The calculated SiC growth rate by vapour transport is always less than the erosion rate and further subsequent growth of pure SiC cannot be obtained as long as silica co-exists with SiC. (C) 2011 Elsevier Ltd. All rights reserved.
Ricardo R Gonzalez - One of the best experts on this subject based on the ideXlab platform.
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photoselective laser Vaporization prostatectomy versus transurethral prostate resection a cost analysis
The Journal of Urology, 2010Co-Authors: Alvin Goh, Ricardo R GonzalezAbstract:Purpose: Laser procedures to treat symptomatic benign prostatic hyperplasia are becoming more common despite concern for potentially increasing cost burdens often associated with new technologies.Materials and Methods: Actual costs associated with photoselective laser Vaporization prostatectomy and transurethral prostate resection were measured using the EPSi™ and TSI (Eclipsys®) hospital cost accounting systems at 2 large tertiary referral centers for the first 12 months that GreenLight HPS™ was performed. Only patients who presented for photoselective laser Vaporization prostatectomy or transurethral prostate resection as the principal treatment during the hospital visit were included in study.Results: A total of 250 men underwent transurethral prostate resection and 220 underwent photoselective laser Vaporization prostatectomy, including 194 (78%) and 209 (95%), respectively, treated on an outpatient basis with less than 23 hours of hospitalization. Overall costs of laser Vaporization were lower than t...
Ed Koullick - One of the best experts on this subject based on the ideXlab platform.
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photoselective Vaporization prostatectomy experience with a novel 180 w 532 nm lithium triborate laser and fiber delivery system in living dogs
The Journal of Urology, 2011Co-Authors: Reza S Malek, Hyun Wook Kang, Yihlih Steven Peng, Douglas G Stinson, Michael T Beck, Ed KoullickAbstract:Purpose: We studied Vaporization parameters, and anatomical and histopathological outcomes of photoselective Vaporization of the prostate with the novel GreenLight™ XPS™ 180 W, 532 nm lithium triborate laser and MoXy™ fiber in a survival model of living dogs. We compared these findings with those of the existing GreenLight HPS™ 120 W 532 nm lithium triborate laser photoselective Vaporization of the prostate in living dogs.Materials and Methods: Eight dogs underwent antegrade photoselective Vaporization of the prostate with the 180 W laser delivered through a new 750 μm (vs the existing 600 μm core diameter), 50% larger, spot sized, side firing fiber. Four dogs were sacrificed 3 hours and 8 weeks postoperatively, respectively. We recorded laser energy and time. Prostates were sectioned, measured and histologically analyzed after hematoxylin and eosin, triphenyltetrazolium chloride or Gomori trichrome staining and compared with a normal control.Results: Photoselective Vaporization of the prostate with the 1...
