Base de dados : LILACS
Pesquisa : B01.300.300.500.800 [Categoria DeCS]
Referências encontradas : 40 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 4 ir para página            

  1 / 40 LILACS  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1051342
Autor: Pele, Milagre A; Rubio Ribeaux, Daylin; Rodrigues Vieira, Edson; Souza, Adriana F; Luna, Marcos A C; Montero Rodríguez, Dayana; Andrade, Rosileide F S; Sales Alviano, Daniela; Sales Alviano, Celuta; Barreto-Bergter, Eliana; Santiago, André L C M A; Campos-Takaki, Galba M.
Título: Conversion of renewable substrates for biosurfactant production by Rhizopus arrhizus UCP 1607 and enhancing the removal of diesel oil from marine soil
Fonte: Electron. j. biotechnol;38:40-48, Mar. 2019. tab, graf, ilus.
Idioma: en.
Projeto: CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico); . FACEPE (Fundação de Amparo à Ciência e Tecnologia de Pernambuco).
Resumo: BACKGROUND: The use of agro-industrial wastes to produce high value-added biomolecules such as biosurfactants is a promising approach for lowering the total costs of production. This study aimed to produce biosurfactants using Rhizopus arrhizus UCP 1607, with crude glycerol (CG) and corn steep liquor (CSL) as substrates. In addition, the biomolecule was characterized, and its efficiency in removing petroderivatives from marine soil was investigated. RESULTS: A 22 factorial design was applied, and the best condition for producing the biosurfactant was determined in assay 4 (3% CG and 5% CSL). The biosurfactant reduced the surface tension of water from 72 to 28.8 mN/m and produced a yield of 1.74 g/L. The preliminary biochemical characterization showed that the biosurfactant consisted of proteins (38.0%), carbohydrates (35.4%), and lipids (5.5%). The compounds presented an anionic character, nontoxicity, and great stability for all conditions tested. The biomolecule displayed great ability in dispersing hydrophobic substrates in water, thereby resulting in 53.4 cm2 ODA. The best efficiency of the biosurfactant in removing the pollutant diesel oil from marine soil was 79.4%. CONCLUSIONS: This study demonstrated the ability of R. arrhizus UCP1607 to produce a low-cost biosurfactant characterized as a glycoprotein and its potential use in the bioremediation of the hydrophobic diesel oil pollutant in marine soil
Descritores: Rhizopus/metabolismo
Tensoativos/metabolismo
Gasolina
-Solo
Tensoativos/toxicidade
Tensão Superficial
Biodegradação Ambiental
Ambiente Marinho
Zea mays
Agroindústria
Interações Hidrofóbicas e Hidrofílicas
Glicerol
Resíduos Industriais
Micelas
Mucorales/metabolismo
Responsável: CL1.1 - Biblioteca Central


  2 / 40 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-828171
Autor: Moreira, José; Ridolfi, Felipe; Almeida-Paes, Rodrigo; Varon, Andrea; Lamas, Cristiane C.
Título: Cutaneous mucormycosis in advanced HIV disease
Fonte: Braz. j. infect. dis;20(6):637-640, Nov.-Dec. 2016. graf.
Idioma: en.
Resumo: ABSTRACT Angionvasive mucormycosis is an emerging fungal disease known to affect mainly diabetics or subjects with profound neutropenia. Infection usually occurs through the inhalation route, but cutaneous inoculation may occur after trauma or burns. However, mucormycosis remains unusual in HIV infection. We report a fatal case of cutaneous mucormycosis due to Rhizopus arrhizus involving the scalp following herpes zoster infection. The patient was a 42-year-old man with advanced AIDS failing on salvage antiretroviral therapy. The fungus was diagnosed on the basis of histopathology and culture. Our case emphasizes the need to consider mucormycosis in the differential diagnosis of necrotic cutaneous lesions in patients with late-stage HIV disease.
Descritores: Rhizopus/isolamento & purificação
Infecções Oportunistas Relacionadas com a AIDS/diagnóstico
Infecções Oportunistas Relacionadas com a AIDS/tratamento farmacológico
Mucormicose/diagnóstico
-Mucormicose/tratamento farmacológico
Limites: Humanos
Masculino
Adulto
Tipo de Publ: Relatos de Casos
Responsável: BR1.1 - BIREME


  3 / 40 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-974320
Autor: Yuwa-amornpitak, Thalisa; Chookietwatana, Kannika.
Título: Bioconversion of waste cooking oil glycerol from cabbage extract to lactic acid by Rhizopus microsporus
Fonte: Braz. j. microbiol;49(supl.1):178-184, 2018. tab, graf.
Idioma: en.
Projeto: Mahasarakham University.
Resumo: Abstract Glycerol from spent oil was processed by transesterification for biodiesel production. Although glycerol contains many types of impurities, it can be used as a C-source for lactic acid production by fungi, such as Rhizopus microsporus. In this study, we found that wild type R. microsporus (LTH23) produced more lactic acid than the mutant strains on cabbage glycerol media (CG media). More lactic acid was produced on CG media than on cabbage extract media (C media) by about two-fold in batch fermentation conditions. In addition, we found that lactic acid production in a fed-batch process was also slightly higher than in a batch process. To study the combined effects of pH, urea, and glycerol waste concentration on lactic acid production, a response surface methodology was used. The optimum pH, urea, and glycerol waste concentrations were pH 6.5, 3.75 g/L, and 17 g/L, respectively. The maximum lactic acid production predicted by this equation model was 4.03 g/L.
Descritores: Rhizopus/metabolismo
Brassica/química
Ácido Láctico/metabolismo
Glicerol/metabolismo
-Resíduos/análise
Brassica/metabolismo
Brassica/microbiologia
Biotransformação
Culinária
Meios de Cultura/metabolismo
Meios de Cultura/química
Biocombustíveis/análise
Fermentação
Concentração de Íons de Hidrogênio
Responsável: BR1.1 - BIREME


  4 / 40 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-839373
Autor: Guneser, Onur; Demirkol, Asli; Yuceer, Yonca Karagul; Togay, Sine Ozmen; Hosoglu, Muge Isleten; Elibol, Murat.
Título: Production of flavor compounds from olive mill waste by Rhizopus oryzae and Candida tropicalis
Fonte: Braz. j. microbiol;48(2):275-285, April.-June 2017. tab, graf.
Idioma: en.
Projeto: The Scientific and Technological Council of Turkey.
Resumo: Abstract The purpose of this study was to investigate the production of flavor compounds from olive mill waste by microbial fermentation of Rhizopus oryzae and Candida tropicalis. Olive mill waste fermentations were performed in shake and bioreactor cultures. Production of flavor compounds from olive mill waste was followed by Gas Chromatography–Mass spectrometry, Gas chromatography- olfactometry and Spectrum Sensory Analysis ®. As a result, 1.73-log and 3.23-log cfu/mL increases were observed in the microbial populations of R. oryzae and C. tropicalis during shake cultures, respectively. C. tropicalis can produce a higher concentration of d-limonene from olive mill waste than R. oryzae in shake cultures. The concentration of d-limonene was determined as 185.56 and 249.54 µg/kg in the fermented olive mill waste by R. oryzae and C. tropicalis in shake cultures respectively. In contrast, R. oryzae can produce a higher concentration of d-limonene (87.73 µg/kg) d-limonene than C. tropicalis (11.95 µg/kg) in bioreactor cultures. Based on sensory analysis, unripe olive, wet towel, sweet aromatic, fermented aromas were determined at high intensity in olive mill waste fermented with R. oryzae meanwhile olive mill waste fermented with C. tropicalis had only a high intensity of unripe olive and oily aroma.
Descritores: Rhizopus/metabolismo
Candida tropicalis/metabolismo
Olea/metabolismo
Aromatizantes/metabolismo
Resíduos Industriais
-Terpenos/metabolismo
Biotecnologia/métodos
Contagem de Colônia Microbiana
Cicloexenos/metabolismo
Fermentação
Olfatometria
Cromatografia Gasosa-Espectrometria de Massas
Responsável: BR1.1 - BIREME


  5 / 40 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Texto completo
Id: biblio-1006701
Autor: Elizei, Virgínia Guerra; Chalfoun, Sara Maria; Botelho, Deila Magna dos Santos; Rebelles, Pedro Paulo Reis.
Título: Atividade antifúngica, in vitro, do óleo de café verde / Antifungal activity, in vitro, of the green coffee oil
Fonte: Arq. Inst. Biol;83:e1162013, 2016. graf.
Idioma: pt.
Resumo: O objetivo deste trabalho foi avaliar o efeito do contato direto e da fração volátildo óleo de café verde, testado nas concentrações de 500, 1.000, 1.500 e 2.000 µL L-1, sobre o crescimento micelial e a esporulação dos fungos Penicillium roqueforti e Rhizopus stolonifer. O óleo essencial de cravo-da-índia na concentração de 800 µL L-1 foi utilizado para comparação. Nas concentrações de 1.500 e 2.000 µL L-1, o óleo de café verde em contato direto proporcionou redução da esporulação do fungo R. stolonifer , sendo estatisticamente semelhante ao óleo de cravo-da-índia. Na fração volátil do óleo de café verde, observou-se redução significativa da esporulação de P. roqueforti e R. stolonifer na concentração de 2.000 µL L-1. O óleo de café verde, em contato direto ou por volatilização, reduziu significativamente o crescimento micelial e a esporulação de ambos os fungos em comparação com a testemunha.(AU)

The objective of this study was to evaluate the effect of direct contact and volatile fraction of from green coffee oil, tested at concentrations of 500, 1,000, 1,500 and 2,000 µL L-1, on mycelial growth and sporulation of Penicillium roqueforti and Rhizopus stolonifer . The essential oil of clove at a concentration of 800 µL L-1 was used for comparison. At concentrations of 1,500 and 2,000 µL L-1, the green coffee oil in direct contact caused a reduction of sporulation for R. stolonifer, similar to clove oil. In the volatile fraction of the green coffee oil, there was a significant reduction in sporulation of P. roqueforti and R. stolonifer at a concentration of 2,000 µL L-1. The green coffee oil, in direct contact or by volatilization, significantly reduced the mycelial growth and sporulation of both fungi compared to the control.(AU)
Descritores: Penicillium
Rhizopus
Óleo de Cravo
Antifúngicos
-Fungos
Responsável: BR1942.1 - NID - Biblioteca - Núcleo de Informação e Documentação


  6 / 40 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-877331
Autor: Girardi, Fabio Muradás; Rocha, Anderson Lima da; Sousa, Mireille Angelo Bernardes; Eidt, Michelle Virginia.
Título: Fulminant auricular mucormycosis in a diabetic patient
Fonte: Clin. biomed. res;37(4):362-365, 2017. ilus.
Idioma: en.
Resumo: Human mucormycosis is an atypical fungal infection that commonly affects the skin, but rarely the auricular region. A 32-year-old diabetic woman, agricultural worker, was admitted with swelling, redness and mild signs of epidermolysis of the left ear, associated with intense pain, facial paralysis and septic signs. The ear cellulitis evolved into necrosis of the same region on the following day. Surgical debridement was performed and antimycotic therapy was started with poor response. The patient died in 48h. Culture was confirmatory for Rhizopus sp. (AU)
Descritores: Complicações do Diabetes
Mucormicose/complicações
Rhizopus/patogenicidade
-Mucormicose/microbiologia
Mucormicose/cirurgia
Limites: Humanos
Feminino
Adulto
Tipo de Publ: Relatos de Casos
Responsável: BR18.1 - Biblioteca FAMED/HCPA


  7 / 40 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-720437
Autor: Galiza, Glauco J. N; Tochetto, Camila; Rosa, Fábio B; Panziera, Welden; Silva, Taiara M. da; Caprioli, Rafaela A; Kommers, Glaucia D.
Título: Utilização de três métodos imuno-histoquímicos na detecção de aspergilose e zigomicose em animais / Usage of three immunohistochemical methods in the detection of aspergillosis and zygomycosis in animals
Fonte: Pesqui. vet. bras = Braz. j. vet. res;34(7):637-642, jul. 2014. ilus, tab.
Idioma: pt.
Projeto: CNPq; . CNPq - Edital Universal.
Resumo: Visando a otimização do uso da técnica de imuno-histoquímica (IHQ) na detecção de Aspergillus spp. e zigomicetos (membros da família Mucoraceae), utilizaram-se dois anticorpos monoclonais fungo-específicos em fragmentos de tecidos de animais (fixados em formol e embebidos em parafina) com diagnóstico histomorfológico prévio de aspergilose e zigomicose, os quais foram submetidos a três sistemas de detecção diferentes (dois biotinilados e um não biotinilado). Os dois anticorpos apresentaram alta especificidade e sensibilidade nos tecidos examinados. Não ocorreram reações cruzadas entre os anticorpos utilizados e os agentes etiológicos avaliados (incluindo casos de aspergilose, zigomicose, candidíase e pitiose). No entanto, reações inespecíficas foram observadas nas hifas em alguns casos, as quais puderam ser eliminadas através de um dos métodos de detecção utilizados. Para a aspergilose, o método da estreptavidina-biotina-fosfatase alcalina não apresentou reações inespecíficas nas hifas. Enquanto que nos casos de zigomicoses, as reações inespecíficas não ocorreram no método por polímero (não biotinilado). A técnica de IHQ mostrou-se uma ferramenta muito útil na detecção e confirmação dos casos de aspergilose e zigomicose neste estudo retrospectivo.

Aiming to optimize the usage of the immunohistochemical technique (IHC) in the detection of Aspergillus spp. and zygomycetes (members of the Mucoraceae family), two fungal-specific monoclonal antibodies were used in tissue fragments (formalin-fixed paraffin-embedded), previously diagnosed by histomorphology as aspergillosis and zygomycosis. Tissues were submitted to three different detection systems (two biotinilated and one non biotinilated). Both antibodies showed high specificity and sensitivity in the examined tissues. No cross-reactions were observed between the antibodies used and the agents evaluated (including cases of aspergillosis, zygomycosis, candidiasis and pythiosis). However, nonspecific reactions in hyphae were observed in some cases, but were eliminated by mean of one of the detection systems used. In the aspergillosis cases, with the streptavidin-biotin-alkaline phosphatase method, nonspecific reactions were not observed. In the zygomycosis cases, nonspecific reactions did not occur using a polymer (nonbiotinilated). The IHC technique showed to be a useful tool detecting and confirming aspergillosis and zygomycosis in this retrospective study.
Descritores: Anticorpos
Aspergillus/isolamento & purificação
Aspergilose/veterinária
Reações Cruzadas
Imuno-Histoquímica/veterinária
Rhizopus/isolamento & purificação
Zigomicose/veterinária
-Aves/microbiologia
Bovinos/microbiologia
Cães/microbiologia
Ovinos/microbiologia
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


  8 / 40 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-658930
Autor: Zhang, Lu; Tian, Xinlun; Wang, Peng; Zhang, Hong; Feng, Ruie.
Título: Recurrent pulmonary mucormycosis after lobectomy in a non-smoking patient without predisposing risk factors
Fonte: Braz. j. infect. dis;16(6):590-593, Nov.-Dec. 2012. ilus, tab.
Idioma: en.
Resumo: Pulmonary mucormycosis is a very rare clinical condition in patients without underlying risk factors. A limited number of cases have been reported in predominantly elderly patients; history of smoking appears to be a common feature. A case of non-smoking male who developed pulmonary mucormycosis with the longest reported follow-up is presented. In addition, this is also the first reported case with disease recurrence after lobectomy (two years) in an immunocompetent host. Treatment with an additional lobectomy and amphotericin B was successful in this patient.
Descritores: Pneumopatias Fúngicas/cirurgia
Mucormicose/cirurgia
Rhizopus/isolamento & purificação
-Imunocompetência
Pneumopatias Fúngicas/tratamento farmacológico
Mucormicose/tratamento farmacológico
Pneumonectomia
Recidiva
Fatores de Risco
Limites: Adolescente
Humanos
Masculino
Tipo de Publ: Relatos de Casos
Responsável: BR1.1 - BIREME


  9 / 40 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: lil-645173
Autor: Alvarado Hernández, Alejandra; Barrera Necha, Laura Leticia; Hernández Lauzardo, Ana Niurka; Velázquez del Valle, Miguel Gerardo.
Título: Actividad antifúngica del quitosano y aceites esenciales sobre Rhizopus stolonifer -Ehrenb: Fr Vuill, agente causal de la pudrición blanda del tomate / Antifungal activity of chitosan and essential oils on Rhizopus stolonifer Ehrenb: Fr Vuill causal agent of soft rot of tomato
Fonte: Rev. colomb. biotecnol;13(2):127-134, dic 1, 2011.
Idioma: es.
Resumo: Rhizopus stolonifer es el agente causal de la pudrición blanda, enfermedad poscosecha que ocasiona pérdidas económicas importantes. Se han empleado fungicidas sintéticos como el dicloran para controlar a este microorganismo, sin embargo, se ha demostrado que los fungicidas representan un riesgo para el ambiente y la salud humana. Actualmente se buscan alternativas naturales para el control de las pudriciones poscosecha. Se evaluó in vitro e in situ el efecto antifúngico del quitosano y de los aceites esenciales de canela (Cinnamomum zeylanicum), clavo (Syzygium aromaticum) y tomillo (Thymus vulgaris) y dicloran sobre Rhizopus stolonifer. Los tratamientos más efectivos para inhibir in vitro a Rhizopus stolonifer fueron obtenidos con quitosano a 10 mg mL-1, con los tres aceites esenciales probados a la concentración de 0,3 mg mL-1, las mezclas de quitosano a 10 mg mL-1 con los aceites a 0,3 mg mL-1 y el dicloran a 1 mg mL-1. Los experimentos in situ mostraron que el tratamiento individual con quitosano fue el mejor para reducir el porcentaje de infección de los frutos de tomate (Lycopersicon esculentum) inoculados con Rhizopus stolonifer y que la mezcla de quitosano con aceites esenciales no mejora la actividad antifúngica. El quitosano y el dicloran fueron los mejores tratamientos para reducir la pérdida de peso de los frutos. Los tratamientos individuales con quitosano representan una alternativa natural para controlar la pudrición blanda en frutos de tomate.

Rhizopus stolonifer is the causal agent of soft rot, postharvest disease that causes important economic losses. Synthetic fungicides such as dichloran have been used to control this microorganism; however, it has been shown that fungicides represent a risk for the environment and human health. Actually, natural alternatives are looked for the control of postharvest rotting. In vitro and in situ experiments the antifungal effect of chitosan, essential oils of cinnamon (Cinnamomum zeylanicum), clove (Syzygium aromaticum), and thyme (Thymus vulgaris) and dichloran on Rhizopus stolonifer were evaluated. The most effective treatments for in vitro inhibition of Rhizopus stolonifer were obtained by quitosano to 10 mg mL-1, with the three essential oils proved to the concentration of 0.3 mg mL-1, the mixtures chitosan to 10 mg mL-1 with the oils at 0.3 mg mL-1 and dichloran at 1 mg mL-1. In situ experiments showed that the individual treatment with chitosan was the best to reduce the infection percentage of the tomato (Lycopersicon esculentum) fruits inoculated with Rhizopus stolonifer and chitosan mixture with essential oils did not improve its antifungal activity. Chitosan and dichloran were the best treatments to reduce the weight loss of the fruits. Individual treatments with chitosan represent a natural alternative for the control of soft rot on tomato fruits.
Descritores: Rhizopus/enzimologia
-Rhizopus/patogenicidade
Responsável: CO326 - Departamento de Biología


  10 / 40 LILACS  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: lil-627222
Autor: Täger F, Marlis; Zaror C, Luis; Martínez D, Pilar.
Título: Mucormicosis cutánea en un paciente inmunocomprometido / Cutaneous mucormycosis in an immunocompromised patient
Fonte: Rev. chil. infectol;29(1):101-107, feb. 2012. ilus.
Idioma: es.
Resumo: Mucormycosis is an increasingly emerging life-threatening infection and is an important cause of morbidity and mortality in patients with leukemia. We present the case of a 4-year-old boy with an acute lymphoblastic leukemia complicated by severe and prolonged neutropenia during induction chemotherapy, who developed cutaneous mucormycosis of the elbow. Direct microscopy with KOH and the histopathologic observation of the skin revealed fungal hyphae without septations. The cultures were positive for Rhizopus microsporus var oligosporus. The patient was treated succefully with amphotericin B during 40 days, surgical debridement and dermoepidermic graft. Early recognition and prompt intervention with combined medical and surgical treatment may improve the outcome. The most common management strategy in survivors involves a combination of antifungal therapy with amphotericin B and surgical debridement.

La mucormicosis es una enfermedad emergente grave, producida por hongos saprófitos del orden Mucorales, que afecta fundamentalmente a pacientes inmunocom-prometidos. La forma cutánea se origina por inoculación de esporas dentro de la dermis con el subsecuente desarrollo de una lesión tipo ectima, generalmente única y de evolución rápidamente progresiva, por las características angioinvasoras del hongo, que determina amplias zonas de infartos y necrosis en los tejidos. Presentamos el caso de un paciente con cuatro años de edad, con diagnóstico de leucemia linfoblástica aguda, en quimioterapia de inducción, que cursó con neutropenia profunda y prolongada, presentando una lesión cutánea en el codo compatible con ectima gangrenoso. Recibió tratamiento antimicrobiano y antifúngico, asociado a un aseo quirúrgico. El cultivo para hongos demostró crecimiento de Rhizopus microsporus var oligosporus, y la histología concluyó presencia de hifas no septadas. El estudio de extensión descartó compromiso óseo, sinusal y cerebral. Completó 40 días de terapia antifúngica con anfotericina B deoxicolato, evolucionando satisfactoriamente. Posteriormente requirió injerto dermo-epidérmico. Si bien esta patología es infrecuente, debemos sospecharla en pacientes con neoplasias hematológicas, para establecer un diagnóstico etiológico oportuno, ya que el tratamiento contempla el desbridamiento quirúrgico precoz asociado a antifúngicos sistémicos, siendo de elección anfotericina B.
Descritores: Dermatomicoses/imunologia
Hospedeiro Imunocomprometido
Mucormicose/imunologia
Leucemia-Linfoma Linfoblástico de Células Precursoras/imunologia
Rhizopus/isolamento & purificação
-Dermatomicoses/diagnóstico
Dermatomicoses/microbiologia
Mucormicose/diagnóstico
Mucormicose/microbiologia
Limites: Pré-Escolar
Humanos
Masculino
Responsável: CL1.1 - Biblioteca Central



página 1 de 4 ir para página            
   


Refinar a pesquisa
  Base de dados : Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde