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Numerical simulation of CO2 diffusion and reaction into aqueous solutions of different absorbents
Antonio Comite,Camilla Costa,Renzo Di Felice,Paolo Pagliai,Dario Vitiello 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.2
A numerical model comprising a system of partial differential equations was set up to describe the diffusionand reaction of carbon dioxide into aqueous solutions of different absorbents. The solution of the governing equationwas a function of the physical and chemical parameters involved, such as Henry constant, diffusion coefficientsand reaction rates. Although these parameters have been estimated and reported in literature, uncertainty still existsabout their reliability. Comparison between numerical predictions and experimental values from specifically designedexperiments shows them to be in good agreement, thus increasing the confidence on the correctness of these parameters,which form then the basis for a proper design of industrial units.
Moving up the Quality Ladder? EU-China Dynamics in Clothing
( Hylke Vandenbussche ),( Francesco Di Comite ),( Laura Rovegno ),( Christian Viegelahn ) 세종대학교 경제통합연구소(구 세종대학교 국제경제연구소) 2013 Journal of Economic Integration Vol.28 No.2
We apply a simple method to study the relative quality of Chinese versus European products exported in the clothing sector after the end of the Multi-Fiber Arrangement. Based on the model of Foster et al., (2008), we interpret the change in relative export prices and quantities sold in narrowly defined product categories as an indicator of quality shifts. Using UN Comtrade data, we find that European varieties exported to the US typically sell for a higher price than identical Chinese varieties exported to the US, but this price gap is narrowing. Despite rising prices, Chinese varieties are gaining market share. This opposite movement of relative prices and quantities sold in the same destination market are a strong indication of China`s moving up the quality ladder in its clothing exports relative to the EU. While European core products in clothing are stable over time, Chinese exports show product dynamics with exit and entry of new core products every year.
Treatment of Industrial Wastewater with High Concentration of Hydrocarbons Using Membrane Reactors
Bienati, B.,Bottino, A.,Comite, A.,Ferrari, F.,Firpo, R.,Capannelli, G 한국막학회 2007 멤브레인 Vol.17 No.2
The application of membrane bioreactors for the depuration of wastewater coming from the washing of mineral oil storage tanks is described. Microfiltration hollow-fibre membranes were used in the submerged configuration. Filtration tests were carried out with a biomass concentration of about 15 g/L in order to assess the critical flux of the hollow fibre membrane used. Then particular care was taken in carrying out the performance runs in the sub-critical flux region. The reactor performance was very high, with removal efficiencies ranging between 93% and 97% also when the concentration of hydrocarbon was very high. Some kinetic parameters for the COD and the hydrocarbon removal were estimated.
Treatment of Industrial Wastewater with High Concentration of Hydrocarbons Using Membrane Reactors
G Capannclli,B. Bienati,A. Bottino,A. Comite,F. Ferrari,R. Firpo 한국막학회 2007 멤브레인 Vol.17 No.2
The application of membrane bioreactors for the depuration of wastewater coming from the washing of mineral oil storage tanks is described. Microfiltration hollow-fibre membranes were used in the submerged configuration. Filtration tests were carried out with a biomass concentration of about 15 g/L in order to assess the critical flux of the hollow fibre membrane used. Then particular care was taken in carrying out the performance runs in the sub-critical flux region. The reactor performance was very high, with removal efficiencies ranging between 93% and 97% also when the concentration of hydrocarbon was very high. Some kinetic parameters for the COD and the hydrocarbon removal were estimated.
Craig V. Comiter,Amy D. Dobberfuhl 대한비뇨의학회 2016 Investigative and Clinical Urology Vol.57 No.1
Surgery is the most efficacious treatment for postprostatectomy incontinence. The ideal surgical approach depends on a variety of patient factors including history of prior incontinence surgery or radiation treatment, bladder contractility, severity of leakage, and patient expectations. Most patients choose to avoid a mechanical device, opting for the male sling over the artificial urinary sphincter. The modern male sling has continued to evolve with respect to device design and surgical technique. Various types of slings address sphincteric incompetence via different mechanisms of action. The recommended surgery, however, must be individualized to the patient based on degree of incontinence, detrusor contractility, and urethral compliance. A thorough urodynamic evaluation is indicated for the majority of patients, and the recommendation for an artificial urinary sphincter, a transobturator sling, or a quadratic sling will depend on urodynamic findings and the patient's particular preference. As advancements in this field evolve, and our understanding of the pathophysiology of incontinence and mechanisms of various devices improves, we expect to see continued evolution in device design.
Raveen Syan,Mason A. Briggs,John C. Olivas,Sakti Srivastava,Craig V. Comiter,Amy D. Dobberfuhl 대한비뇨의학회 2019 Investigative and Clinical Urology Vol.60 No.1
Purpose: OnabotulinumtoxinA (BTX) detrusor chemodenervation is an efficacious third-line treatment for overactive bladder. Despite high clinical efficacy rates for BTX injection, many patients refuse initial or repeat treatment due to the invasiveness of the cystoscopic route of delivery. We assess the feasibility of injecting the trigone and posterior bladder wall via a transvaginal route under ultrasound guidance using a human cadaveric model. Materials and Methods: Eight de-identified anonymous fresh female deceased donor cadaver pelvises were placed in supine split leg position. A transvaginal ultrasound probe guided injections of India ink into the trigone in 3 sites and the posterior wall in 2 sites. Full thickness bladder biopsies were then obtained and histologic analysis was performed to confirm presence of India ink in the detrusor layer. Results: The mean time from day of death was 11.0 days (range, 4.0–23.0 days). Three to five bladder biopsies were obtained per cadaver, for a total of 34 specimens (20 trigone, 14 posterior wall). Histologic analysis revealed presence of India ink within the detrusor layer in 8/8 (100.0%) of cadavers. The surgeon's perception of appropriate targeting under ultrasound guidance was confirmed in 8/8 cadavers (100.0%) involving the bladder trigone, and 7/8 (87.5%) involving the posterior wall. Of injections that were believed to have appropriately targeted the detrusor layer, 22/34 specimens (64.7%) demonstrated the presence of India ink under histologic analysis. Conclusions: Intradetrusor injection of the bladder trigone and posterior wall under transvaginal ultrasound guidance is feasible and has acceptable accuracy.
Amandeep Mahal,Nichole Young-Lin,Amy Dobberfuhl,Jaclyn Estes,Craig Vance Comiter 대한비뇨의학회 2018 Investigative and Clinical Urology Vol.59 No.4
Purpose: To understand the therapeutic potential of pioglitazone, a peroxisome proliferator-activated receptor gamma (PPAR-γ) agonist with a propensity to cause bladder mucosal proliferation, on interstitial cystitis (IC) in a rat model. Materials and Methods: Using a previously described animal model for IC, Sprague-Dawley rats were treated with biweekly cyclophosphamide injections (35 mg/kg) to induce cystitis. Animals were divided into 4 groups (n=6 for each group): IC plus daily sham saline gavage (IC+Pio−), IC plus daily pioglitazone gavage (15 mg/kg) (IC+Pio+), normal rats with daily pioglitazone (IC−Pio+), and normal rats with neither IC nor pioglitazone (IC−Pio− or Control). At the end of four weeks, urinary frequency and bladder capacity were measured. Histologic examination of urothelial integrity was also performed. Results: Average voids per hour were significantly lower in IC+Pio+ (4.0±1.9) vs. IC+Pio− (10.0±2.4) rats (p<0.01) and were similar to IC−Pio+ (6.0±1.4) and IC−Pio− (6.0±1.5) controls. Cystometric capacity was significantly higher in IC+Pio+ (0.945±0.122 mL) vs. IC+Pio− rats (0.588±0.165 mL, p=0.01) and was comparable to IC−Pio− capacity (0.817±0.196 mL) and IC−Pio+ capacity (0.941±0.188 mL). Urothelial structural integrity was improved in IC+Pio+ rats versus IC+Pio− rats upon histologic observation. Conclusions: Pioglitazone, a PPAR-γ agonist, improved bladder function in cyclophosphamide-induced cystitis by both observed urinary frequency and measured cystometric capacity. Urothelial structural integrity was also improved. Pioglitazone, due to a propensity to cause bladder mucosal proliferation, may prove useful for treating IC, and deserves further investigation.