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Search Results: 1 - 10 of 132633 matches for " Carolina T. Miranda "
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Microalgae Lipid and Biodiesel Production: A Brazilian Challenge  [PDF]
Carolina T. Miranda, Roberta F. Pinto, Daniel V. N. de Lima, Carolina V. Viegas, Simone M. da Costa, Sandra M. F. O. Azevedo
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.615254
Abstract: Global increases in atmospheric CO2 and climate change are drawing considerable attention to identify sources of energy with lower environmental impact than those currently in use. Biodiesel production from microalgae lipids can, in the future, occupy a prominent place in energy generation because it represents a sustainable alternative to petroleum-based fuels. Several species of microalgae produce large amounts of lipids per biomass unit. Triacylglycerol is the fatty acid used for biodiesel production and the main source of energy reserves in microalgae. The current literature indicates that nutrient limitations can lead to triacylglycerol accumulation in different species of microalgae. Further efforts in microalgae screening for biodiesel production are needed to discover a native microalgae that will be feasible for biodiesel production in terms of biomass productivity and oil. This revision focuses in the biotechnological potential and viability of biodiesel production from microalgae. Brazil is located in a tropical region with high light rates and adequate average temperatures for the growth of microalgae. The wide availability of bodies of water and land will allow the country to produce renewable energy from microalgae.
Optimization of Nitrogen, Phosphorus and Salt for Lipid Accumulation of Microalgae: Towards the Viability of Microalgae Biodiesel  [PDF]
Carolina T. Miranda, Daniel V. N. de Lima, Georgia C. Atella, Paula F. de Aguiar, Sandra M. F. O. Azevedo
Natural Science (NS) , 2016, DOI: 10.4236/ns.2016.812055
Abstract:
In recent years, microalgae biodiesel has attracted expressive attention and investment, once it was considered a potential resource for energy. Although the wide use of microalgae biodiesel is restricted by its high production cost. For cost-efficient and sustainable production of biodiesel from microalgae, a proper understanding of the variables and their impacts on physiology of the strains is required. In this study, a simple factorial design 23 was used to find optimal conditions for the cultivation of Ankistrodesmus sp. and Chlamydomonas sp. in batch culture. The three components considered were nitrate, phosphate and sodium chloride, used to assess the metabolic versatility of the strains in brackish conditions. The results showed that culture medium with 0.04 g·L?1 nitrate, 0.01 g·L?1 phosphate and 5.0 g·L?1 sodium chloride resulted to be the most effective condition to growth and fatty acids accumulation. Using this optimal condition, Ankistrodesmus sp. and Chlamydomonas sp. increased in 2.1 and 2.4 folds their fatty acids yield, respectively. Importantly, this protocol reduced 75% of the nitrate and phosphate concentrations of the original medium (ASM-1). Additionally, fatty acids analysis found that these strains were mainly constituted of C16-C18, in accordance with the requirements for biodiesel production. The simple factorial design applied here proved to be an important tool towards a better understanding of synergistic effects of tested factors on microalgae metabolism, and the resulting information could be used effectively to improve microalgae cultivation.
MANIFESTACIONES RADIOGRAFICAS DE LA TUBERCULOSIS PULMONAR
Miranda G,Gonzalo; Díaz P,Juan Carlos; Arancibia H,Patricia; Antolini T,Monica; Díaz G,Carolina; Vidal F,Alvaro;
Revista chilena de radiología , 2004, DOI: 10.4067/S0717-93082004000400006
Abstract: tuberculosis is a pathology that has accompanied humanity since ancient times and regardless the existence of antibiotics for more than a century and that tuberculosis is a preventable and treatable disease, eradication is a goal not yet achievable. in chile 40 to 70 cases are diagnosed every week which means physicians are constantly faced to this disease. the diagnosis is suspected based on typical respiratory symptoms and chest radiographs is the first imagenological approach. several radiographical patterns, with interstitial and parenquimatous involvement are main features of this disorder. these manifestations are related to the patient's age, immunological status, previous exposure and disease stage. different radiological patterns are shown from patients admitted in our hospital at the first semester of this year
Evaluation of Etest and macrodilution broth method for antifungal susceptibility testing of Candida sp strains isolated from oral cavities of AIDS patients
SILVA, Maria do Rosário R.;COSTA, Márcio R.;MIRANDA, André T.B.;FERNANDES, Orionalda de F.L.;COSTA, Carolina R.;PAULA, Claudete R. de;
Revista do Instituto de Medicina Tropical de S?o Paulo , 2002, DOI: 10.1590/S0036-46652002000300002
Abstract: a comparison of the etest and the reference broth macrodilution susceptibility test for fluconazole, ketoconazole, itraconazole and amphotericin b was performed with 59 of candida species isolated from the oral cavities of aids patients. the etest method was performed according to the manufacturer's instructions, and the reference method was performed according to national committee for clinical laboratory standards document m27-a guidelines. our data showed that there was a good correlation between the mics obtained by the etest and broth dilution methods. when only the mic results at ± 2 dilutions for both methods were considered, the agreement rates were 90.4% for itraconazole, ketoconazole and amphotericin b and 84.6% for fluconazole of the c. albicans tested. in contrast, to the reference method, the etest method classified as susceptible three fluconazole-resistant isolates and one itraconazole-resistant isolate, representing four very major errors. these results indicate that etest could be considered useful for antifungal sensitivity evaluation of yeasts in clinical laboratories.
Sarcoma sinovial intraoral primario monofásico
GAC E,PATRICIO; CABANé T,PATRICIO; GALLEGOS M,IVáN; ABUSLEME P,EUGENIA; ORTúZAR E,WALDO; AMAT V,JOSé; MARAMBIO R,ANDRéS; MARTíNEZ G,FELIPE; MIRANDA V,CAROLINA;
Revista chilena de cirugía , 2008, DOI: 10.4067/S0718-40262008000400011
Abstract: synovial sarcoma is a well-differentiated malignant tumor of soft tissues, that corresponds approxi-mately 10% of all soft tissue sarcomas. its location in the head and neck uncommon and the location in the oral cavity is really peculiar, with only 32 previously described cases, of which only three corresponded to the monophasic type. we report a 16 years oíd male patient consulting for a lump in the right oral mucosa. the patient was operated in two occasions excising the tumor with radical lymph node dissection and parotid gland excisión. the pathological diagnosis was a monophasic intraoral synovial sarcoma. postoperative radiotherapy was recommended but not done. after 16 months of follow up the patient is without evidence of relapse
Avalia??o da tenacidade à fratura de diferentes sistemas ceramicos
Pagani, Clovis;Miranda, Carolina Baptista;Bottino, Marco Cícero;
Journal of Applied Oral Science , 2003, DOI: 10.1590/S1678-77572003000100012
Abstract: although ceramics present high compressive strength, they are brittle materials due to their low tensile strength so they have lower capacity to absorb shocks. this study evaluated the fracture toughness of different ceramic systems, which refers to the ability of a friable material to absorb defformation energy. three ceramic systems were investigated. ten cylindrical samples (5,0mm x 3,0mm), were obtained from each ceramic material as follows: g1- 10 samples of vitadur alpha (vita-zahnfabrik); g2- 10 samples of ips empress2 (ivoclar-vivadent); g3- 10 samples of in-ceram alumina (vita-zahnfabrik). fracture toughness values were collected upon indentation tests that were performed under a heavy load. a microhardness tester (digital microhardness tester fm) utilized a 500gf load cell during 10seconds to perform four impressions on each sample. statistically significant results were observed (anova and kruskal-wallis tests). in-ceram alumina presented the highest median toughness values (2,96n/m3/2), followed by vitadur alpha (2,08n/m3/2) and ips empress2 (1,05n/m3/2). it may be concluded that different ceramic systems present distinct fracture toughness values, thus in-ceram is capable of absorbing superior stress when compared to vitadur alpha and ips empress2.
O perfil de macronutrientes influencia a termogênese induzida pela dieta e a ingest?o calórica
Hermana Miranda Hermsdorff,Helen; Pinheiro Volp,Ana Carolina; Bressan,Josefina;
Archivos Latinoamericanos de Nutrición , 2007,
Abstract: a composi??o da dieta pode interferir diretamente na homeostase energética. no metabolismo energético, a via de oxida??o e a termogênese induzida pela dieta s?o diferenciadas pela propor??o de macronutrientes da dieta. neste sentido, a dieta hiperprotéica émais termogênica que as dietas hiperglicídicas e hiperlipídicas, enquanto que as dietas ricas em carboidrato parecem ser mais termogênicas que as ricas em lipídio, mas os resultados ainda s?o controversos. em rela??o à ingest?o calórica, a composi??o da dieta pode estimular ou inibir a mesma, de acordo com a palatabilidade dos alimentos e o grau de sacia??o e saciedade, relacionadas às quantidades de carboidrato, proteína e lipídio da mesma. uma hierarquia tem sido relatada para a capacidade dos macronutrientes em induzir saciedade em que a proteína é o mais sacietógeno ao contrário dos lipidios, que s?o os menos sacietógenos. de modo geral, ainda há discrepancias entre os estudos, em rela??o ao papel regulador dos macronutrientes em componentes do gasto energético e na ingest?o calórica, devido às diferen?as metodológicas como amostra, tempo de exposi??o à dieta, densidade calórica e conteúdo calórico total da mesma. desta forma, o presente trabalho tem como objetivo analisar as evidências científicas mais consistentes a respeito do papel modulador da composi??o da dieta na termogênese induzida pela dieta e na ingest?o calórica, para melhor entendimento da preven??o e controle da obesidade pela interven??o dietética.
A disciplina de leitura: ritmo e oralidade na voz do texto
Castro, Juliana de Miranda e;Lo Bianco, Anna Carolina;
Psicologia & Sociedade , 2009, DOI: 10.1590/S0102-71822009000400014
Abstract: taking into account that psychoanalytic practice involves a careful way of reading, the present article approaches the listening of what is said as part of the reading of a text. it uses the concepts of meschonnic to circumscribe a fundamental element: the oral dimension which is considered the 'voice' of a text. this dimension helps the text to maintain a live characteristic as well as its enunciation which leads to the unconscious. it uses the notion of rhythm that implies a scansion made in the text that makes for the appearance of the voice. it then emphasizes that a rhythm can be attached to the treatment, in accordance to czermak, which implies a strict discipline of reading. from that point the conditions are offered to a subject for him/her to occupy an ethical position that implies becoming subjected to the voice of his/her own text.
Jonathan Swift y su contribución científica en "Los viajes de Gulliver"
Miranda C,Marcelo; Pérez J,Carolina; Slachevsky Ch,Andrea;
Revista médica de Chile , 2011, DOI: 10.4067/S0034-98872011000300018
Abstract: jonathan swift is one of the most celebrated satirist writers in literature. his well-known "gulliver's travels", apartfrom being a serious human being criticism, contains many interesting ana unrecognized comments about medical and other scientific facts. swift made what seems to be thefirst account of a dementing illness in the elderly; his description fits well with what we now know as alzheimer's disease. he also described a condition now called synaesthesia, a very interestingphenomenon that may contribute to creativity. in thispaper, we review aspects ofhis ufe and reveal these amazing descriptions as samples of swift's extraordinary power of observation.
Remoción mediante vermicomposteo de los coliformes fecales presentes en lodos biológicos
Droppelmann,Carmen Verónica; Gaete,Carolina Pía; Miranda,Paulina;
Revista Facultad de Ingeniería Universidad de Antioquia , 2009,
Abstract: the aim of the present study was to investigate the effect of stoking density on the pathogens reduction, through the sludge vermicomposting, using the most probable number of fecal coliforms as indicator. the sludge used was generated at an extended aeration system; the stoking density was investigated at 0.2, 0.1 and 0.05 kg-worms/kg-sludge plus a control without worms. at the second day of experimentation the 0.1 kg/kg density achieved a significantly higher removal than the 0.2 kg/kg density. in the same day, all the stoking densities achieved the united states environment agency class b sludge standards. between the 13 and 20 day all the stoking densities, with the exception of the control, achieved the usepa class a standards. on day 20 the removal in the two biggest stoking densities was 100%.
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