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Review on renal recovery after anatrophic nephrolithotomy:Are we really healing our patients?

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World Journal of Nephrology 2015年第1期4卷 105-110页

作者： Leonardo de Albuquerque dos Santos Abreu Douglas Gregório Camilo-Silva Gustavo Fiedler Gustavo Barboza Corguinha matheus miranda paiva Jo?o Antonio Pereira-Correia Valter José Fernandes Muller Department of Urology Servidores do Estado Federal HospitalRio de JaneiroRJ 20221-903Brazil

The main goals for urinary stone treatment are to preserve renal function, reduce or avoid complications related to calculi, and to render the patient free of calculi as soon as possible. Anatrophic nephrolithotomy(ANL) is a valid and useful alternative for conventional staghorn calculi excision. Although excellent stone free rates can be achieved with ANL there are some drawbacks that may be of concern. Morbidity related to intraoperative and postoperative complications isone of them. Another, great concern is the possibility of reduction on renal function related to the procedure itself. This may be related to nephron injury during nephrotomy and parenchymal closure or to ischemic injury. In this review we assess functional results after anatrophic nephrolithotomy.

关键词： Anatrophic nephrolithotomy Kidney lithiasis Kidney stone disease Percutaneous nephrolithotripsy Staghorn calculus

Effect of a commercial dispersion of multi walled carbon nanotubes on the hydration of an oil well cementing paste

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Frontiers of Structural and Civil Engineering 2016年第2期10卷 174-179页

作者： Ocar Aurelio MENDOZA REALES William C. PEARL Jr Maria D. M. paiva Cristiane R. miranda Romildo Dias TOLEDO FILHO Civil Engineering Department PEC/COPPE Universidade Federal do Rio de Janeiro Rio de Janeiro 21941-972 Brazil Halliburton Brazil Technology Center Halliburton Rio de Janeiro 21941-907 Brazil CPetrobras Petroleo Brasileiro S.A Rio de Janeiro 21941-901 Brazil

This work studies the influence of a commercial dispersion of multi wall carbon nanotubes （MWCNT） on the hydration of a class G cement paste, at room and elevated down-hole temperatures. The MWCNT dispersion was produced with a solids concentration of 3.0 % by mass and an anionic surfactant as dispersing agent. Cement pastes with water-to-cement ratio of 0.45 and additions of solid MWCNT by mass of cement up to 0.50 % were studied. Isothermal calorimetry results showed a clear retardation of the hydration of cement caused by the surfactant contained in the MWCNT dispersion. Nevertheless, thermogravimetric evaluations showed that once the hydration reaction resumed, the retardation effect of the surfactant did not have a negative impact on the amount of hydration products precipitated. It was concluded that the commercial MWCNT dispersion presents a good potential to be applied in oil well cement pastes.

关键词： carbon nanotubes surfactant retardation combined water C-S-H

Minimally invasive tenodesis for peroneus longus tendon rupture: A case report and review of literature

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World Journal of Orthopedics 2020年第2期11卷 137-144页

作者： Danilo Ryuko Cândido Nishikawa Fernando Aires Duarte Guilherme Honda Saito Cesar de Cesar Netto Fábio Correia paiva Fonseca Bruno Rodrigues de miranda Augusto César Monteiro Marcelo Pires Prado Department of Orthopedics Foot and Ankle SurgeryHospital of the Municipal Public Servant of São Paulo(HSPM)Aclimação 01532-000São PauloBrazil Ortocity Orthopaedic Clinic Lapa 05078-000São PauloBrazil Department of Orthopaedics Foot and Ankle SurgeryHospital Israelita Albert EinsteinJardim Leonor 05652-900São PauloBrazil Department of Orthopedics Foot and Ankle SurgeryUniversity of IowaIowa CityIA 52242United States

BACKGROUND Peroneal tendon disorders are common causes of lateral hindfoot ***,total rupture of the peroneal longus tendon is *** treatment for this condition is usually a side-to-side tenodesis of the peroneal longus tendon to the peroneal brevis *** the traditional procedure involves a long lateral curved incision,this approach is associated with damage to the lateral soft tissues(up to 24%incidence).CASE SUMMARY A 50-year-old female had developed pain at the lateral aspect of the hindfoot 1 mo after an ankle sprain while walking in the *** treatments were anti-inflammatory drugs,ice,rest and Cam-walker *** physical exam,there was pain and swelling over the course of the peroneal *** instability and cavovarus foot deformity were ruled *** strength was weak(4/5).Imaging showed complete rupture of the peroneal longus tendon associated with a sharp hypertrophic peroneal *** repair was indicated after failure of conservative treatment(physiotherapy,rest,analgesics,and ankle stabilizer).A less invasive approach was performed for peroneal longus tendon debridement and side-to-side tenodesis to the adjacent peroneal brevis tendon,with successful clinical and functional *** Peroneus longus tendon tenodesis can be performed through a less invasive approach with preservation of the lateral soft tissue integrity.

关键词： Peroneus longus tendon Complete rupture Tenodesis Minimally invasive surgery Wound breakdown Case report

Can gadoxetic acid–enhanced magnetic resonance imaging be used to avoid liver biopsy in patients with nonalcoholic fatty liver disease?

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World Journal of Hepatology 2020年第9期12卷 661-671页

作者： Viviane Brandão Amorim Daniella Braz Parente Fernando Fernandes paiva Jaime Araújo Oliveira Neto Amanda Almeida miranda Cláudia Cravo Moreira Flávia Ferreira Fernandes Carlos Frederico FerreiraCampos Nathalie Carvalho Leite Renata de Mello Perez Rosana Souza Rodrigues Research Department D’Or Institute for Research and EducationRio de Janeiro 22281Brazil Radiology Department Brazilian National Cancer InstituteRio de Janeiro 20230-130Brazil Radiology Department Fleury Group S.A.Rio de Janeiro 20765-000Brazil Radiology Department Hospital Universitário Clementino Fraga FilhoFederal University of Rio de JaneiroRio de Janeiro 21941-590Brazil São Carlos Institute of Physics University of São PauloSão Carlos 13560-970Brazil Radiology Department Quinta D'Or HospitalRio de Janeiro 20941-150Brazil Radiology Department Centro de Diagnóstico Médico do MaranhãoMaranhão 65074-441Brazil Department of Clinical Medicine Hospital Universitário Clementino Fraga FilhoFederal University of Rio de JaneiroRio de Janeiro 21941-590Brazil Gastroenterology and Hepatology Department Hospital Federal de BonsucessoRio de Janeiro 21041-030Brazil Department of Pathology and Laboratories University of the State of Rio de JaneiroRio de Janeiro 20551-030Brazil Internal Medicine Department Hospital Universitário Clementino Fraga FilhoFederal University of Rio de JaneiroRio de Janeiro 21941-590Brazil Gastroenterology Department Hospital Universitário Pedro ErnestoUniversity of the State of Rio de JaneiroRio de Janeiro 20551-030Brazil

BACKGROUND Nonalcoholic fatty liver disease(NAFLD)is a major cause of liver disease *** diagnosis of nonalcoholic steatohepatitis(NASH),the most severe form of NAFLD,is crucial and has prognostic and therapeutic ***,currently this diagnosis is based on liver biopsy and has several *** To evaluate the performance of gadoxetic acid–enhanced magnetic resonance imaging(GA-MRI)in differentiating isolated steatosis from NASH in patients with *** In this prospective study,56 patients with NAFLD(18 with isolated steatosis and 38 with NASH)underwent *** contrast enhancement index(CEI)was calculated as the rate of increase of the liver-to-muscle signal intensity ratio from before and 20 min after intravenous GA ***-group differences in mean CEI were examined using Student's t *** area under the receiver operator characteristic curve and the diagnostic performance of gadoxetic acid–enhanced magnetic resonance imaging were *** The mean CEI for all subjects was 1.82±*** mean CEI was significantly lower in patients with NASH than in those with isolated steatosis(P=0.008).Two CEI cut-off points were used:2.00(89%sensitivity)to characterize isolated *** values between 1.66 and 2.00 indicated liver biopsy,and the procedure could be avoided in 40%of patients with *** GA-MRI is an effective noninvasive method that may be useful for the differentiation of NASH from isolated steatosis,and could help to avoid liver biopsy in patients with NAFLD.

关键词： Fatty liver Nonalcoholic fatty liver disease Nonalcoholic steatohepatitis Gadoxetic

Bubble Column Reactor Fluid-dynamic Evaluation at Pilot-plant for Residue and Extra-heavy Crude Oil Upgrading Technology

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Journal of Chemistry and Chemical Engineering 2015年第3期9卷 176-190页

作者： Ricardo Sardella Palma Zacarias Luis paiva Miguel Medina Henry Infrastructure and Upgrading Department PDVSA-Intevep Los Teques-Miranda 1201 Venezuela Refining Department PDVSA-Intevep Los Teques-Miranda 1201 Venezuela

Bubble column reactors are multiphase contacting devices used in a wide variety of industrial application. Inrtevep S. A. is working on developing technologies to convert heavy and extra-heavy crude oil using this type of reactors. Volumetric gas hold up, flow pattern, average gas bubble size, average interfacial area, RTD （residence time distribution）, dispersion coefficient, Peclet number are important design parameters for a proper scale up of them. Several cold model experiments have been proposed to determine the previously mentioned parameters at atmospheric conditions, using a plexiglas bubble column reactor at pilot plant scale unit （12 cm diameter）. It was also evaluated our own design of internal trays （plates） in the reactor. Air-tap water and air-light oil systems have been used. A wide operating condition range was applied, superficial gas velocity between 0.5-10 cm/s, liquid flowrate between 15-65 I/h. Generally speaking, working without internal trays was found that gas hold up increase along the reactor and it was possible to identify heterogeneous bubble, transition and turbulent flow pattern areas for the air-light oil system. Average gas bubble size increase along the reactor at bubble regime from 2-5 mm but at turbulent regime, stay oscillating between 1-3 mm. Average interfacial area increases exponentially with superficial gas velocity at any reactor height, till 1,412 m2/m3 for the air-light oil system but, at bubble flow regime, the average interfacial area is lower than 100 m2/m3, which negatively impact the reactor performance. Internal trays in the reactor always increase gas hold up at any condition or system used. Residence time distributions curves, Peclet numbers and dispersion coefficients founded, show that this reactor with this kind of design internal trays still tends to be a complete mixing reactor under the operating conditions used.

关键词： Fluid dynamic bubble column reactor residue upgrading technology trays.

Effect of Growth Regulators in Production and Rooting of Coffea arabica ***

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American Journal of Plant Sciences 2018年第4期9卷 628-636页

作者： Paulo Fernando Marques Cavalcanti Filho Diego Corona Baitelle Sílvio de Jesus Freitas Waldinei Souza da Silva Paulo Cesar dos Santos Weverton Pereira Rodrigues Silverio de paiva Freitas Ismael Lourenco de Jesus Freitas Tamara Locatelli Abraao Carlos Verdin Filho Guilherme Bessa miranda Department of Plant Science State University of Northern Rio de JaneiroCampos dos GoitacazesRio de Janeiro StateBrazil

The plants of C. arabica do not naturally produce a large number of orthotropic sprouts, hindering clonal multiplication by cutting, which would be the simplest technique with a lower cost of production compared to other methods of vegetative propagation. An alternative form, used successfully in the propagation of eucalyptus, is propagation by minicutting, which consists of pruning the shoot apex of the plant, forming the ministumps, which in variable time interval emits the shoots that will be used to make minicutting. In C. arabica plants the number of shoots can be increased with the application of growth regulators and fertilizers. So, the purpose of this work was to verify the effect of growth regulators and foliar fertilizers on the emission and development of orthotropic shoots of C. arabica. The experiment was installed in a randomized complete block design, with ten treatments composed by growth regulators and fertilizers: T1 (Control);T2 (Stimulate + Sturdy + Enervig);T3 (Stimulate + Vitakelp + Biozyme);T4 (Tiba + Sturdy + Enervig);T5 (Tiba + Vitakelp + Biozyme);T6 (Brs + Sturdy + Enervig) T7 (Brs + Vitakelp + Biozyme);T8 (Stimulate);T9 (TIBA);T10 (Brs-Brassinoesteroid), each plot consisting of two plants. Biometric and physiological parameters were evaluated for the ministumps, as well as the biometric parameters of the shoots and plant survival. The results showed that there was no influence of the treatments on the biometric parameters of the ministumps. A greater number of orthotopic sprouts were obtained in treatments with the TIBA growth regulator, as well as a greater plant survival of the minicuttings, after 25 days of transplanting in a greenhouse. It was concluded that TIBA treatments influenced the production and quality of clonal minicuttings of C. arabica.

关键词： Arabica Coffee Ministumps Clonal Propagation