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Internal Carotid Artery Dissection in Brazilian Jiu-Jitsu
Zeferino Demartini Jr,Maxweyd Rodrigues Freire,Roberto Oliver Lages,Alexandre Novicki Francisco,Felipe Nanni,Luana A. Maranha Gatto,Gelson Luis Koppe 대한뇌혈관외과학회 2017 Journal of Cerebrovascular and Endovascular Neuros Vol.19 No.2
Carotid artery dissection is a significant cause of stroke in young patients. It may be asymptomatic and go undiagnosed, or minimal transient manifestations may follow, commanding a higher index of suspicion than ordinarily exists to avoid misdiagnosis. Reported herein is a 27-year-old man who suffered extracranial internal carotid artery dissection while practicing a Brazilian Jiu-Jitsu submission maneuver. The patient's condition suddenly deteriorated one week later due to distal embolization and stroke. Despite endovascular treatment, with stenting of the cervical carotid artery, neurologic deficits remained. Of note, the objective in martial arts, which is to kill or incapacitate, has yet to be fully tempered in transitioning to sport. Brazilian Jiu-jitsu, a relatively new and fast-growing form of martial art, places emphasis on submission maneuvers. Related injuries are not common knowledge and are poorly described in the literature. This account is intended to shed light on the risk of this discipline. Through education and improved supervision, vascular injuries of this nature and the potentially lethal or disabling consequences may thus be prevented in young athletes.
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Zeferino, Raul Sanchez,Pal, Umapada,Reues, Ma Eunice De Anda,Rosas, Efrain Rubio Techno-Press 2019 Advances in nano research Vol.7 No.1
Well-crystalline $SnO_2$ nanoparticles of 4-5 nm size with different In contents were synthesized by hydrothermal process at relatively low temperature and characterized by transmission electron microscopy (TEM), microRaman spectroscopy and photoluminescence (PL) spectroscopy. Indium incorporation in $SnO_2$ lattice is seen to cause a lattice expansion, increasing the average size of the nanoparticles. The fundamental phonon vibration modes of $SnO_2$ lattice suffer a broadening, and surface modes associated to particle size shift gradually with the increase of In content. Incorporation of In drastically enhances the PL emission of $SnO_2$ nanoparticles associated to deep electronic defect levels. Although In incorporation reduces the band gap energy of $SnO_2$ crystallites only marginally, it affects drastically their dye degradation behaviors under UV illumination. While the UV degradation of methylene blue (MB) by undoped $SnO_2$ nanoparticles occurs through the production of intermediate byproducts such as azure A, azure B, and azure C, direct mineralization of MB takes place for In-doped $SnO_2$ nanoparticles.
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Zeferino, R. Sanchez,Pal, U.,Melendrez, R,Flores, M. Barboza Techno-Press 2013 Advances in nano research Vol.1 No.4
In this article, we present the effects of Ag doping and after-growth thermal annealing on the photoluminescence (PL) and thermoluminescence (TL) behaviors of $SnO_2$ nanoparticles. $SnO_2$ nanoparticles of 4-7 nm size range containing different Ag contents were synthesized by hydrothermal process. It has been observed that the after-growth thermal annealing process enhances the crystallite size and stabilizes the TL emissions of $SnO_2$ nanostructures. Incorporated Ag probably occupies the interstitial sites of the $SnO_2$ lattice, affecting drastically their emission behaviors on thermal annealing. Both the TL response and dose-linearity of the $SnO_2$ nanoparticles improve on 1.0% Ag doping, and subsequent thermal annealing. However, a higher Ag content causes the formation of Ag clusters, reducing both the TL and PL responses of the nanoparticles.
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Rubieli Carla Frezza Zeferino,Vinicius Aleixo Angonese Piaia,Vinícius Tres Orso,Vítor Machado Pinheiro,Micheli Zanetti,Gustavo Lopes Colpani,Natan Padoin,Cíntia Soares,Márcio Antônio Fiori,Humberto Gr 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-
This work aims to synthesize neryl acetate from the nerol esterification reaction with acetic anhydridethrough heterogeneous catalysis using the ion exchange resin Lewatit GF 101. The reaction was monitoredby gas chromatography and the neryl acetate chemical structure was confirmed by mass spectrometryand nuclear magnetic resonance spectroscopy. The variables effect on the neryl acetate synthesiswas evaluated from an experimental design analysis. The reaction showed the highest combined valuesfor nerol conversion (98.11%) and neryl acetate selectivity (86.10%) at 30 min within optimal experimentalconditions of temperature at 40 C, catalyst content at 7% wt, molar ratio at 1:4 (nerol: acetic anhydride),agitation speed at 250 rpm and nerol content at 3 mmol. The complete nerol conversion wasachieved at 40 min with 82.34% selectivity. The reaction rate was controlled only by the nerol decay,an expected behavior due to the excess of acetic anhydride used. In addition, the value obtained forthe main reaction kinetic constant found by a pseudo-homogeneous model was 6 times greater than thatof the parallel reaction. The catalyst reuse was investigated and after 3 cycles a high conversion (96.68%)and selectivity (83.78%) were observed indicating a low loss of the catalytic activity.
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Stage and histology of cervical cancer in women under 25 years old
Diama Bhadra Vale,Lucas Almeida Cavalcante,Liliana Aparecida Lucci De Angelo Andrade,Julio Cesar Teixeira,Talita Lourenço do Rio Menin,Luiz Carlos Zeferino 대한부인종양학회 2019 Journal of Gynecologic Oncology Vol.30 No.4
Objective: To evaluate the histological and stage characteristics of cervical cancer in women under 25 years old, and to compare them with older women. Methods: Cross-sectional study of cases from the Hospital Cancer Registry of São Paulo State/Brazil from 2000 to 2015. Variables were age, International Federation of Gynecology and Obstetrics stage and histological type. Prevalence ratio (PR) and its 95% confidence interval (CI) were calculated. Results: Out of 18,423 cervical cancer cases 204 (1.1%) were in women under 25 years old. The most frequent stage was stage I in women under 25 (36.2%) and between 25 and 34 (43.4%), and stage III in older women (31.8%). No statistically significant difference was observed in stages by age group. Squamous carcinomas were the most frequent in 73.5% of women under 25 and 78.5% of older women. In women under 25 the following histological types were more frequent: neuroendocrine carcinomas (PR=6.10, 95% CI=2.03–18.35), malignant germ cell tumors (PR=54.98, 95% CI=26.53–113.95), mesenchymal tumors (sarcomas) (PR=5.67, 95% CI=2.58–12.45) and hematopoietic/lymphoid tumors (PR=0.72, 95% CI=2.90–36.69). Conclusion: In women under 25 years old cervical cancer was an uncommon diagnosis and in about one third occurred at early stage. Squamous carcinoma was the most frequent histological type regardless age, but rare histological types were more frequent in young women.
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