RESUMO
Recycling agents provide better additions of reclaimed asphalt pavement (RAP) in the production of new asphalt mixtures. Alternative and residual materials that have the potential as asphalt binder viscosity reducers have gained visibility in the field of paving due to the perspective of circular economy in recycled mixtures. Soybean oil sludge fatty acid is a material produced from soybean oil sludge, a waste generated in the soybean oil refining step. Thus, this paper investigated the physical, chemical, and rheological effects of the asphalt binder PG 64-XX modified by the fatty acid of soybean oil sludge in the contents of 6% and 7% by weight of the binder. The modified binder samples were submitted to penetration tests, softening point, rotational viscosity, performance grade (PG), before and after short-term aging (RTFO), and multiple stress creep and recovery (MSCR). A control asphalt mixture and recycled asphalt mixtures produced with 40% RAP and fatty acid-modified binders were subjected to tensile strength, induced moisture damage, resilient modulus, and fatigue life. A Student's t statistical test verified the significance of the data, as well as the estimation of production costs of these asphalt mixtures. The use of the fatty acid significantly reduced the stiffness and viscosity of the control asphalt binder, decreasing the mixing temperatures at 14 °C and 17 °C to 6% and 7%, respectively. Using higher fatty acid contents from soybean oil sludge significantly improved the performance of recycled mixtures in tensile strength, moisture damage, and fatigue life. The production cost of recycled asphalt mixtures was lower than that of the control mixture.
Assuntos
Esgotos , Óleo de Soja , Ácidos Graxos , Materiais de ConstruçãoRESUMO
OBJECTIVE: To study use of the medial plantar flap for reconstruction of the heel and foot. METHOD: The authors share their clinical experience with the use of the medial plantar artery flap for coverage of tissue defects around the foot and heel after trauma. Twelve cases of medial plantar artery flap performed from January 2001 to December 2013 were included. RESULTS: Of the 12 patients, ten were male and two were female. The indications were traumatic loss of the heel pad in ten cases and the dorsal foot in two cases. All the flaps healed uneventfully without major complications, except one case with partial flap loss. The donor site was covered with a split-thickness skin graft. The flaps had slightly inferior protective sensation compared with the normal side. CONCLUSION: From these results, the authors suggest that the medial plantar artery flap is a good addition to the existing armamentarium for coverage of the foot and heel. It is versatile flap that can cover defects on the heel, over the Achilles tendon and plantar surface, as well as the dorsal foot. It provides tissue to the plantar skin with a similar texture and intact protective sensation.
OBJETIVO: Estudar casos de retalho plantar medial na reconstrução do calcanhar e do pé. MÉTODO: Os autores apresentam sua experiência com o uso do retalho baseado na artéria plantar medial para cobertura de defeitos teciduais no pé, especialmente do calcanhar. Doze retalhos da artéria plantar medial, feitos entre janeiro de 2001 e dezembro de 2013, foram incluídos. RESULTADOS: Dos 12 pacientes, dez eram homens e duas mulheres. As indicações foram perda traumática do coxim do calcanhar em dez pacientes e dorso do pé em dois casos. Todos os retalhos cicatrizaram sem maiores complicações, exceto um caso com perda parcial. A área doadora foi coberta com enxerto de pele parcial. Os retalhos apresentaram uma sensibilidade protetora levemente inferior ao lado normal. CONCLUSÃO: De acordo com os resultados, o retalho plantar medial é uma boa opção para cobertura do pé, especialmente da região do calcanhar. A versatilidade do retalho permite a cobertura de defeitos no calcanhar, sobre o tendão de Aquiles e apoio plantar, assim como o dorso do pé. Esse retalho confere para região plantar uma pele de textura similar e sensibilidade protetora intacta.
RESUMO
ABSTRACT OBJECTIVE: To study use of the medial plantar flap for reconstruction of the heel and foot. METHOD: The authors share their clinical experience with the use of the medial plantar artery flap for coverage of tissue defects around the foot and heel after trauma. Twelve cases of medial plantar artery flap performed from January 2001 to December 2013 were included. RESULTS: Of the 12 patients, ten were male and two were female. The indications were traumatic loss of the heel pad in ten cases and the dorsal foot in two cases. All the flaps healed uneventfully without major complications, except one case with partial flap loss. The donor site was covered with a split-thickness skin graft. The flaps had slightly inferior protective sensation compared with the normal side. CONCLUSION: From these results, the authors suggest that the medial plantar artery flap is a good addition to the existing armamentarium for coverage of the foot and heel. It is versatile flap that can cover defects on the heel, over the Achilles tendon and plantar surface, as well as the dorsal foot. It provides tissue to the plantar skin with a similar texture and intact protective sensation.
RESUMO OBJETIVO: Estudar casos de retalho plantar medial na reconstrução do calcanhar e do pé. MÉTODO: Os autores apresentam sua experiência com o uso do retalho baseado na artéria plantar medial para cobertura de defeitos teciduais no pé, especialmente do calcanhar. Doze retalhos da artéria plantar medial, feitos entre janeiro de 2001 e dezembro de 2013, foram incluídos. RESULTADOS: Dos 12 pacientes, dez eram homens e duas mulheres. As indicações foram perda traumática do coxim do calcanhar em dez pacientes e dorso do pé em dois casos. Todos os retalhos cicatrizaram sem maiores complicações, exceto um caso com perda parcial. A área doadora foi coberta com enxerto de pele parcial. Os retalhos apresentaram uma sensibilidade protetora levemente inferior ao lado normal. CONCLUSÃO: De acordo com os resultados, o retalho plantar medial é uma boa opção para cobertura do pé, especialmente da região do calcanhar. A versatilidade do retalho permite a cobertura de defeitos no calcanhar, sobre o tendão de Aquiles e apoio plantar, assim como o dorso do pé. Esse retalho confere para região plantar uma pele de textura similar e sensibilidade protetora intacta.
Assuntos
Humanos , Masculino , Feminino , Pré-Escolar , Criança , Adolescente , Adulto , Pessoa de Meia-Idade , Traumatismos do Pé , Calcanhar , Ferimentos e LesõesRESUMO
Introdução: A cobertura do pé e especialmente da região do calcâneo são desafios técnicos para o cirurgião devido ao alto grau de especialização dos tecidos envolvidos e à relativa imobilidade dos tecidos próximos. Métodos: No presente estudo, apresentamos nossa experiência com uso do retalho baseado na artéria plantar medial para cobertura de defeitos teciduais no pé, especialmente na região de apoio plantar no calcâneo. Doze retalhos da artéria plantar medial feitos de 2001 a 2013 no Hospital Regional da Asa Norte, Brasília, DF, foram incluídos. Resultados: Dos 12 pacientes, 10 eram homens e dois eram mulheres. As indicações foram perda traumática do coxim do calcâneo em 10 pacientes e dorso do pé em dois casos. Todos os retalhos foram elevados como retalhos pediculados fasciocutâneos baseados na artéria plantar medial. Todos os retalhos cicatrizaram sem maiores complicações, exceto um caso com perda parcial. A área doadora foi coberta com enxerto de pele parcial e houve um caso de perda parcial do enxerto. Os retalhos apresentaram uma sensibilidade protetora levemente inferior ao lado normal. Conclusão: De acordo com os resultados, o retalho plantar medial é uma boa opção para cobertura do pé, especialmente do calcâneo. A versatilidade do retalho permite a cobertura de defeitos no calcâneo sobre o tendão de Aquiles e apoio plantar, assim como o dorso do pé. A cobertura da região de apoio plantar com pele de textura similar e sensibilidade protetora confere a esse retalho uma grande vantagem sobre outros retalhos para reconstrução dessa região.
Introduction: Reconstructive coverage of foot defects, especially those of the calcaneus region, is a unique technical challenge for the surgeon due to the high degree of specialization of the tissues involved and the relative immobility of the proximal tissues. Methods: In the present study, we present our experience with the use of the flap based on the medial plantar artery to cover tissue defects in the foot, especially in the region of the calcaneal fat pad. Twelve medial plantar artery flaps constructed from 2001 to 2013 at the As a Norte Regional Hospital, Brasília, DF, were included. Results: Of the 12 patients with the medial plantar artery flaps, 10 were men and 2 were women. The indications were traumatic tissue loss of the plantar fat pad in 10 patients and of the dorsum of the foot in two cases. All flaps were elevated as fasciocutaneous pedicle flaps based on the medial plantar artery. All the flaps healed without major complications, except one case that involved partial loss . The donor area was covered with a partial skin graft and there was one case of partial graft loss. The flap displayed a slightly lower protective sensitivity than the normal side. Conclusion: According to the results, the medial plantar flap is a good option for covering traumatic foot defects, especially those affecting the calcaneus. The versatility of the flap allows the coverage of defects of the calcaneus (e.g., the Achilles tendon and plantar fat pad regions), as well as those affecting the dorsum of the foot. The coverage of the plantar fat pad region with skin of similar texture and protective sensitivity confers to the medial plantar flap a large advantage over other flaps for reconstruction of this region.
Assuntos
Humanos , Masculino , Feminino , Pré-Escolar , Pessoa de Meia-Idade , Adulto Jovem , Retalhos Cirúrgicos , Transplante , Ferimentos e Lesões , Calcâneo , Estudos Retrospectivos , Traumatismos do Pé , Procedimentos de Cirurgia Plástica , Retalhos de Tecido Biológico , Transplante/métodos , Ferimentos e Lesões/cirurgia , Ferimentos e Lesões/terapia , Calcâneo/cirurgia , Calcâneo/lesões , Traumatismos do Pé/cirurgia , Traumatismos do Pé/terapia , Procedimentos de Cirurgia Plástica/métodos , Retalhos de Tecido Biológico/cirurgiaRESUMO
Data analysis, presentation and distribution is of utmost importance to a genome project. A public domain software, AdDB, has been chosen as the common basis for parasite genome databases, and a first release of TcruziDB, the Trypanosoma cruzi genome database, is available by ftp from ftp://irisdbbm.fiocruz.br/pub/genomedb/TcruziDB as well as versions of the software for different operating systems (ftp://iris.dbbm.fiocruz.br/pub/unixsoft/). Morever, data originated from the project are available from the WWW server at http://www.dbbm.fiocruz.br. It contains biological and parasitological data on CL Brener, its karytype, all available T. cruzi sequences from Genbank, data on th EST-sequencing project and on available libraries, a T. cruzi codon table and a listing of activities and participating groups in the genome project, as well as meeting reports. T. cruzi discussion lists (tcruzi-l@iris.dbbm.fiocruz.br and tcgenics@iris.dbbm.fiocruz.br) being maintained for communication and to promote collaboration in the genome project.