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Search Results: 1 - 10 of 657115 matches for " M. F. G. F. da Silva "
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Effect of Ultraviolet Radiation on Fungi Beauveria bassiana and Metarhizium anisopliae, Pure and Encapsulated, and Bio-Insecticide Action on Diatraea saccharalis  [PDF]
I. M. Wenzel Rodrigues, M. R. Forim, M. F. G. F. da Silva, J. B. Fernandes, A. Batista Filho
Advances in Entomology (AE) , 2016, DOI: 10.4236/ae.2016.43016
Abstract: The effect of ultraviolet radiation on entomopathogenic fungi can be very prejudicial for causing damage to the conidia. Formulations can help protecting these fungal structures against radiation. The objective of this study was to evaluate the effect of UV radiation on pure and encapsulated conidia Beauveria bassiana and Metarhizium anisopliae sensu lato, and to evaluate their pathogenicity on the sugarcane borer, Diatraea saccharalis. The pure conidia and the sodium alginate capsules containing the fungi were submitted to the ultraviolet radiation in different temperatures and exposure times. On the pure conidia, the radiation had a deleterious effect after 5 minutes of exposure, going from 94% to 52% germination for B. bassiana and from 96% to 54% for M. anisopliae. The alginate formulation protected the B. bassiana conidia against the radiation in all times they were evaluated (15 minutes to 48 hours), because, even after exposure, the fungi remained viable. The dry encapsulated conidia B. bassiana caused 79.6% mortality of the studied pest and the M. anisopliae caused only 10%.
Interactivity and Information- Communication Technologies in Chemical Engineering Classes  [PDF]
A. J. Santiago, C. E. da Silva, A. F. Machado, M. G. Muniz Washington
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.32002
Abstract:

In this paper, we propose a new contextualization of the so-called scientific method in teaching practices in science and engineering education. We report an objectification in information and communication technologies (ICT) for simulate the reaction rates during an class and its inclusion in the above-mentioned pedagogical purpose, that, in tune with the current realities of schools, rehearses reflections of a future with another horizon for teaching/learning engineering and other sciences.

Risk Factors for Surgical Site Infection after Hip Arthroplasty: A Multicentric Study  [PDF]
Gabriel B. Tofani, Gustavo P. Irffi, Lucas F. Silva, Cynthia C. M. da Silva, Bráulio R. G. M. Couto, Gilberto D. Miranda, Carlos E. F. Starling
Surgical Science (SS) , 2016, DOI: 10.4236/ss.2016.72008
Abstract: The objective of this study is to answer three main questions: What is the risk of wound infection for patients undergoing hip arthroplasty? What are the main etiologicagents of surgical site infection (SSI)? What are the risk factors most associated with surgical site infection? Method: This was a multicentric, retrospective cohort study which analyzed data collected in five general hospitals in Belo Horizonte, Brazil, between the period of January 2009 and December 2013. The continuous parameters studied were age, length of hospital stay before surgery, duration of surgery, number of professionals at surgery and number of hospital admissions. Categorical variables were surgical wound classification (clean, clean contaminated, contaminated, dirty/infected), American Society of Anesthesiologists (ASA) score (I, II, III, IV, V), type of surgery (elective, emergency), general anesthesia (yes, no), prophylactic antibiotic (yes, no), trauma surgery (yes, no) and Nosocomial Infections Surveillance (NNIS) risk index (IRIC = 0, 1, 2, 3). Results: Estimated SSI risk was 3.2% (95% C.I. = 2.6% to 4.1%) and risk of osteomyelitis was 0.6% (95% C.I. = 0.4% to 1.1%). ASA score > 2, general anesthesia, length of hospital stay before surgery higher than four days, more than two professionals at surgical field and duration of surgery higher than five hours were risk factors for SSI after hip prosthesis (p < 0.05). The final multiple logistic regression analysis indicated that the modified NNIS risk was independently associated with surgical site infection after arthroplasty of hip. Conclusion: Despite the modified NNIS index being a risk factor for SSI, none of its independent variables was statistically significantly in the logistic model (p > 0.100). Each modified NNIS risk category increased the chance of a patient being infected by almost three times, when compared with the previous category (OR = 2.82; p = 0.011).
Triterpenes from Cabralea canjerana as in Vitro Inhibitors to Light Reactions of Photosynthesis  [PDF]
Beatriz King-Díaz, Márcio S. Soares, Maria Fátima das G. F. da Silva, Blas Lotina-Hennsen, Thiago A. M. Veiga
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.516267
Abstract:

Aims: Cabraleadiol (1), Ocotilone (2) and Odoratone (3) are three triterpenes isolated from Cabralea canjerana (Vell.) Mart. (Meliaceae). They were chemically characterized, and their effect was tested on the light reaction of photosynthesis. Study Design: Natural products were used as models to find new models for inhibitors of photosynthesis. Place and Duration of Study: Departmento de Química, Universidade Federal de São Carlos and Departmento de Bioquímica, Facultad de Química, Universidad Nacional Autonoma de México, between May 2013 and January 2014. Methodology: The natural products had their effect on the light reaction of photosynthesis studied by pollarography and Chlorophyll a (Chl a) fluorescence transients. Results: The compounds inhibited ATP synthesis and electron transport rate (basal, phosphorylating and uncoupled). Therefore, they act as Hill reactions inhibitors. Their inhibition site were located in the range of electron flow from OEC complex and between P680 to QA of PS II, and inhibited the photosystem II (PS II) by inducing the appearance of a K-band which is an indicative that the photochemical apparatus is failing at the donor side of PS II interacting at the OEC complex and by transforming active reaction centers to “heat sinks” or the formation of silent reaction centers unable to reduce QA. Conclusion: Furthermore, these triterpenes inhibit PS II and induce the appearance of small G band which is related with the decreased plastoquinone (PQ) pool reduction.

Minimal surfaces with only horizontal symmetries
M. F. da Silva,G. A. Lobos,V. Ramos Batista
Mathematics , 2009,
Abstract: We find the first examples of triply periodic minimal surfaces of which the intrinsic symmetries are all of horizontal type.
Labor Pain through the Eyes of Brazilian Women and Delivery Nurses  [PDF]
Rafaela Feitosa Coutinho, Taiane da Silva Alves, Alecssandra de Fátima Silva Viduedo, Rejane Antonello Griboski, Casandra G. R. M. P. de Leon, Juliana Machado Schardosim
Open Journal of Nursing (OJN) , 2018, DOI: 10.4236/ojn.2018.81007
Abstract:

Objective: Understanding the perception of women who have recently given birth in a Brazilian hospital regarding labor pain and nursing involvement in the labor process. Methodology: exploratory, descriptive and qualitative study carried out in a Maternity part of the supplementary health system in the Federal District (DF). Data were collected between May and July 2015 through interviews using a semi-structured questionnaire. The sample consisted of 16 mothers and data analysis followed Bardin methodology in three phases. Results: The pain experienced during labor is surrounded by feelings and expectations. Both positive and negative feelings experienced by mothers were identified in the interviews and unanimous opinion was the fact that the second stage is the most painful period as continuous pain is experienced. Some of the participants compared pain with strong menstrual cramps, renal colic and back pain; others, said labor pain was the strongest ever experienced. The immediate contact with the newborn was referred to as a reward for coping with breast pain and suffering. Other factors such as the importance of follow-up, support and coping with the pain and care provided by health staff were also highlighted. Conclusion: empowerment of the mother and family through knowledge is considered an important tool to fight pain and cope with the birth process in a positive and physiological way, which in the long run promotes a cultural change in the population regarding the importance of vaginal birth.

Caracteriza??o da argila bentonítica para utiliza??o na remo??o de chumbo de efluentes sintéticos
Rodrigues, M. G. F.;Silva, M. L. P.;Silva, M. G. C. da;
Ceramica , 2004, DOI: 10.1590/S0366-69132004000300004
Abstract: the main objective of this paper is to characterize the chocolate smectite clays of boa-vista, state of paraíba (brazil), in their natural form, and after chemical treatment for their application in the removal of pb2+ from synthetic effluents. the following methods were used: x-ray fluorescence, x-ray diffraction, scanning electron microscopy and energy dispersive x-ray spectroscopy. in is work the procedures for pb2+ removal from a synthetic inorganic effluent using a natural clay were established. to evaluate the influence of the main parameters, such as ph, clay treatment and granulometry, on pb2+ removal, factorial planning was used and the best results obtained were ph 4.5, granulometry in the range of 35 to 48 mesh and natural clay.
Trichomoniasis in Bothrops jararaca (serpentes, viperidae)
Vilela, F. C.;Silva, M. G. da;Barrella, T. H.;Silva, R. J. da;
Journal of Venomous Animals and Toxins including Tropical Diseases , 2003, DOI: 10.1590/S1678-91992003000100007
Abstract: we describe a case of trichomoniasis in a bothrops jararaca (serpentes, viperidae) donated to the center for the study of venoms and venomous animals - cevap/unesp. the animal had diarrhea with great quantity of flagellated protozoa in the feces. microscopic examination of fecal smears stained with giemsa revealed the presence of trichomonads, morphologically similar to trichomonas acosta. trichomonads were not detected in fecal exams after treatment with a single dose of 40 mg/kg metronidazole (flagyl?).
Time-Dependent Gaussian Solution for the Kostin Equation around Classical Trajectories
F. Haas,J. M. F. Bassalo,D. G. da Silva,A. B. Nassar,M. Cattani
Physics , 2013, DOI: 10.1007/s10773-012-1302-8
Abstract: The structure of time-dependent Gaussian solutions for the Kostin equation in dissipative quantum mechanics is analyzed. Expanding the generic external potential near the center of mass of the wave packet, one conclude that: the center of mass follows the dynamics of a classical particle under the external potential and a damping proportional to the velocity; the width of the wave packet satisfy a non-conservative Pinney equation. An appropriate perturbation theory is developed for the free particle case, solving the long standing problem of finding analytic expressions for square integrable solutions of the free Kostin equation. The associated Wigner function is also studied.
Synthesis and Stabilization of Gold Nanoparticles in Castor Oil [Síntese e Estabiliza o de Nanopartículas de Ouro em óleo de Mamona]
Sara F. A. Morais,Monique G. A. da Silva,Eid C. da Silva,Ariana M. F. de Melo
Revista Virtual de Química , 2013,
Abstract: In this manuscript we show some examples of the scientific literature about formation of hybrid organic-inorganic colloids based on vegetable oils as stabilizing and dispersing agents of metal nanoparticles (or salts). These systems display a strong Green Chemistry link, since a matrix of vegetable oil-based, being an organic, renewable, and non toxic medium, allows the development of new devices that can be applied in biomedical and environmental areas. We also show some of our main results related to the synthesis of stable colloidal castor oil-based systems containing gold nanoparticles dispersed into them.
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