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| Registros recuperados: 16 | |
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| Piloni Martini, Javier. |
| Los principales objetivos del presente estudio fueron aislar y seleccionar bacterias ruminales quitinolíticas con alta capacidad para degradar quitina pura y caparazón de camarón in vitro, e identificar genéticamente a las bacterias seleccionadas usando secuencias de su gen 16S rARN amplificado mediante PCR. El aislamiento de las bacterias ruminales se inicio con un cultivo mixto liofilizado de bacterias quitinolíticas (CMBQ) obtenido de borregos alimentados con una dieta con 25% de caparazón de camarón. Se requirieron tres aislamientos progresivos para obtener dos bacterias ruminales puras. En el primer aislamiento se obtuvieron seis consorcios bacterianos: BQT1, BQT2, BQT3, BQT4, BQT6 y BQT6 , a partir de CMBQ. Por su alta capacidad para... |
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Palavras-chave: Rumen; Quitina; Caparazón de camarón; Bacterias quitinolíticas; 16S rARN Rumen; Chitin; Shrimp shell waste; Chitinolytic bacteria; 16S r RNA. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/787 |
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| Piloni Martini, Javier. |
| Los principales objetivos del presente estudio fueron aislar y seleccionar bacterias ruminales quitinolíticas con alta capacidad para degradar quitina pura y caparazón de camarón in vitro, e identificar genéticamente a las bacterias seleccionadas usando secuencias de su gen 16S rARN amplificado mediante PCR. El aislamiento de las bacterias ruminales se inicio con un cultivo mixto liofilizado de bacterias quitinolíticas (CMBQ) obtenido de borregos alimentados con una dieta con 25% de caparazón de camarón. Se requirieron tres aislamientos progresivos para obtener dos bacterias ruminales puras. En el primer aislamiento se obtuvieron seis consorcios bacterianos: BQT1, BQT2, BQT3, BQT4, BQT6 y BQT6 , a partir de CMBQ. Por su alta capacidad para... |
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Palavras-chave: Rumen; Quitina; Caparazón de camarón; Bacterias quitinolíticas; 16S rARN Rumen; Chitin; Shrimp shell waste; Chitinolytic bacteria; 16S r RNA. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/810 |
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| Portier, R; Meyers, S. |
| The environmental effect and fate of several agricultural and industrial source toxicants were evaluated in controlled laboratory microcosm systems in the presence of the aminopolysaccharide polymer, chitin. Toxicants examined included methyl parathion, phenol, pentachlorophenol, 2,4 dichlorophenol, 1,2 dichloroethane and Kepone. Microcosm operating parameters, including pH/Eh, salinity, temperature, flow rate and sediment/water interface conditions, were based on comparable in situ measurements. Fate analysis predictions were based on mineralization of the parent toxicant compound as measured by chromatographic analysis or super(14)CO sub(2) expiration. Chitin, amended to continuous flow microcosms, promoted either cometabolic or cooxidative... |
| Tipo: Text |
Palavras-chave: Controlled conditions; Chemical pollutants; Industrial wastes; Pesticides; Metabolism; Food webs; Biodegradation; Ecosystems; Microorganisms; Environmental effects; Brackishwater pollution; Estuaries; Toxicants; Chitin. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1011.pdf |
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| Sánchez Portillo, Juan Fernando. |
| El nematodo agallador Meloidogyne incognita Kofoid y White, 1919, Chitwood, 1949, distribuido en 23 de los 32 estados del país y Nacobbus aberrans Thorne 1935, Thorne and Allen, 1944, distribuido en 10 de 32 estados de la República Mexicana, su combate para ambas especies, casi siempre se hace aplicando diferentes agroquímicos, los cuales algunos ya tienen problemas de registro. Se necesita evaluar nuevos productos que sean otra alternativa a su manejo y mas amigables al ambiente. En el presente trabajo se evaluó el efecto de quitina-quitosano con diferentes grados de desacetilación, biopolímeros naturales que poseen propiedades nematicidas y utilizados como reguladores de la población de estos fitonematodos; los estudios se hicieron in vitro, sobre la... |
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Palavras-chave: Biopolímero natural; Meloidogyne incognita; Nacobbus aberrans; Desacetilación; Control; Quitina; Quitosano; Chitin; Chitinase; Natural biopolymer; Chitosan; Deacetylation; Fitopatología; Maestría. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/55 |
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| Sánchez Portillo, Juan Fernando. |
| El nematodo agallador Meloidogyne incognita Kofoid y White, 1919, Chitwood, 1949, distribuido en 23 de los 32 estados del país y Nacobbus aberrans Thorne 1935, Thorne and Allen, 1944, distribuido en 10 de 32 estados de la República Mexicana, su combate para ambas especies, casi siempre se hace aplicando diferentes agroquímicos, los cuales algunos ya tienen problemas de registro. Se necesita evaluar nuevos productos que sean otra alternativa a su manejo y mas amigables al ambiente. En el presente trabajo se evaluó el efecto de quitina-quitosano con diferentes grados de desacetilación, biopolímeros naturales que poseen propiedades nematicidas y utilizados como reguladores de la población de estos fitonematodos; los estudios se hicieron in vitro, sobre la... |
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Palavras-chave: Biopolímero natural; Meloidogyne incognita; Nacobbus aberrans; Desacetilación; Control; Quitina; Quitosano; Chitin; Chitinase; Natural biopolymer; Chitosan; Deacetylation; Fitopatología; Maestría. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/55 |
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| Cavargere,Victor Agati; França,Camille Feitoza; Cardoso,Ricardo; Vianna,Lucia Marques. |
| Several studies characterize the connection of overweight and obesity with chronic diseases. Therefore, new alternatives are being studied for controlling hypertension, such as chitin and chitosan fibers, commonly found on crustacean's carapace like Emerita brasiliensis. Rats from two different strains were divided into control and supplemented groups (n=6). The Wistar strain experiment started with a 14-days baseline period, followed by supplementation of E.brasiliensis flour added to the diet in the doses of 5, 10 and 20%, for a 14-days period each. With the optimal dose of 20%, the study was undertaken with SHR rats, starting with a 7-days baseline period, followed by three weeks of supplementation. Data were evaluated using one-way ANOVA and p<0.05... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chitin; Chitosan; Emerita brasiliensis; Blood pressure. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000400006 |
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| Stamford,Thayza Christina Montenegro; Stamford,Tânia Lucia Montenegro; Stamford,Newton Pereira; Barros Neto,Benicio de; Campos-Takaki,Galba Maria de. |
| Microbiological processes were used for chitin and chitosan productions by Cunninghamella elegans (UCP 542) grown in a new economic culture medium. The assay was carried out to evaluate the growth of C. elegans using yam bean (Pachyrhizus erosus L. Urban) medium, in different times of growth (24, 48, 72 and 96 hrs), incubated at 28ºC in an orbital shaker at 150 rpm. The lyophilized biomass was determined by gravimetry. The polysaccharides were extracted by alkali-acid treatment, and characterized by infrared spectroscopy, titration and viscosity. C. elegans grown in the yam bean medium and produced higher yields of biomass (24.3 g/ mL) in 96 hrs. The high level was chitosan (66 mg/g), and chitin (440 mg/g) were produced at 48 and 72 hrs of growth,... |
| Tipo: Journal article |
Palavras-chave: Biopolymers; Chitin; Chitosan. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000100006 |
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| Franco,Luciana de Oliveira; Maia,Rita de Cássia C.; Porto,Ana Lúcia F.; Messias,Arminda Sacconi; Fukushima,Kazutaka; Campos-Takaki,Galba Maria de. |
| Chitin and chitosan were extracted from mycelial biomass of Cunninghamella elegans and the performance for copper, lead and iron biosorption in aqueous solution was evaluated. The growth curve of C. elegans was accomplished by determination of biomass, pH, glucose and nitrogen consumption. Chitin and chitosan were extracted by alkali-acid treatment and the yields were 23.8 and 7.8%, respectively. For the adsorption analysis, the process of heavy uptake metal sorption was evaluated using polysaccharides solutions (1% w/v). The rate of metallic biosorption was dependent upon the concentration and pH of metal solutions, and the best results were observed with pH 4.0. Chitosan showed the highest affinity for copper and chitin for iron adsorption. The results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cunninghamella elegans; Chitin; Chitosan; Bioremediation; Biosorption. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000200013 |
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| Karthikeyan,M.; Radhika,K.; Mathiyazhagan,S.; Bhaskaran,R.; Samiyappan,R.; Velazhahan,R.. |
| The effect of soil application of biocontrol agents (Pseudomonas fluorescens, Trichoderma viride and T. harzianum) in combination with chitin on induction of phenolics and defense enzymes in coconut roots infected with Ganoderma lucidum, the causal agent of Ganoderma disease, was investigated. Soil application of these biocontrol formulations in combination with chitin induced a significant increase in the activities of peroxidase (PO), polyphenol oxidase (PPO), phenylalanine ammonia-lyase (PAL), chitinase and beta-1,3-glucanase in the G. lucidum infected palms. Activities of both PAL and PO reached maximum levels within 3 d while the activity of PPO reached the maximum level 6 d after application of a mixture of P. fluorescens, T. viride and chitin.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chitin; Ganoderma disease; Induced systemic resistance; Pathogenesis-related proteins; Phenolics; Pseudomonas fluorescens; Trichoderma. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000300003 |
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| Registros recuperados: 16 | |
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