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| Registros recuperados: 32 | |
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| Fusconi,Roberta; Godinho,Mirna Januária Leal. |
| The microbial populations of groundwaters were analyzed in a region under the influence of a landfill (piezometer L12) in the town of São Carlos, São Paulo, Brazil, and in an area not influenced by the landfill (piezometer L5). Heterotrophic bacteria were counted by spread plate method and the number of protozoa was estimated by the most probable number method. There was a larger number of organisms in well L12, with a mean value of 15.76 x 104 CFU/ml for bacteria and 9.7 MPN/ml for protozoa, whereas the mean values for piezometer L5 were 2.88 x 104 CFU/ml for bacteria and 3.4 MPN/ml for protozoa. The greater abundance detected in piezometer L12 may be related to the influence of the leachate through the landfill on the microbial populations, also... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Protozoa; Groundwater; Landfill. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000300003 |
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| Martins,Maurício Laterça; Romero,Nicolás Garcia. |
| One hundred four out of 225 diagnosticated cases were myxosporidian, monogenean, Ichthyophthirius multifiliis Fouquet, 1876 and bacterial diseases in Piaractus mesopotamicus Holmberg, 1887 (pacu), Colossoma macropomum Cuvier, 1818 (tambaqui) and tambacu, at Aquaculture Center, Universidade Estadual Paulista (UNESP), Jaboticabal, São Paulo, Brazil, between 1992 and 1995. The gills were fixed in 10% buffered formalin solution to posterior histologic routine. It was observed Henneguya sp. cysts into the capillaries of the secondary lamellae, encapsulated by the respiratory epithelium cells. It provoked adherence of the adjacent lamellae, hyperplasia, congestion, oedema and epithelium displacement. Monogeneans infestations by Anacanthorus penilabiatus Boeger,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Protozoa; Monogenea; Histopathology; Brazilian fish. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000200017 |
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| Aemiro, Ashagrie; Watanabe, Shota; Suzuki, Kengo; Hanada, Masaaki; Umetsu, Kazutaka. |
| An in vitro study was conducted to investigate the effect of different concentrations of Euglena (Euglena gracilis) on CH4 production, dry matter (DM) digestibility, volatile fatty acid (VFA) and ammonia N(NH3-N) concentration as well as on the protozoa population. The treatments considered were Euglena at concentrations of 0.0, 50, 100, 200, 400 and 1000 g/kg dry matter (DM) of the substrate (60:40 forage: concentrate ratio) incubated for 24 and 96 h using an in vitro continuous gas production and in vitro two-stage digestion procedure, respectively. The data were subjected to polynomial regression analysis. Methane emissions (ml/g DM) decreased at an increasing rate, generally with increasing concentration of Euglena but also exhibited quadratic (P<... |
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Palavras-chave: Methane emission; Euglena; Protozoa; Volatile fatty acid; Digestibility; Ammonia. |
| Ano: 2016 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4458 |
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| Zapata Madrid,Jaime. |
| Las tecamebas son un grupo de protozoos que viven principalmente en las comunidades acuáticas y de ambientes húmedos (suelos, turberas, etc.), en donde juegan un importante rol como descomponedoras de celulosa y lignina; además participan activamente en diversos procesos biológicos que ocurren en los ecosistemas acuáticos. Con respecto al conocimiento de las tecamebas en Chile, éste se mantiene en un estado muy incipiente, de ahí la necesidad de contar con más especialistas, ya que este grupo está adquiriendo cada vez más importancia por su uso en problemas de paleolimnología, como bioindicadores de ambientes lacustres contaminados, como indicadores pedológicos, entre otros. |
| Tipo: Journal article |
Palavras-chave: Protozoa; Tecamebas; Taxonomía; Chile. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000100006 |
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| Portela Díaz, Diego Felipe. |
| Actualmente se necesitan alternativas que disminuyan la emisión de metano asociada a la producción ganadera, una opción, es el uso de plantas que contienen metabolitos secundarios y causan la desfaunación ruminal. El presente estudio tuvo como objetivo principal, evaluar la capacidad desfaunante in vitro de diferentes plantas y subproductos agrícolas, así como su efecto en algunas variables de fermentación ruminal, población de microorganismos, producción de dióxido de carbono y metano. En la primera fase, se evaluaron 10 plantas y 6 subproductos agrícolas. El follaje del chicalote blanco (Argemone ochroleuca) y el subproducto, cascabillo de café (Coffea arabica) fueron seleccionados, ya que presentaron la mayor capacidad desfaunante. A la 96 h de... |
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Palavras-chave: Metano; Desfaunación; Protozoarios; Coffea arabica; Argemone ochroleuca; Methane; Defaunation; Protozoa; Ganadería; Maestría. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1711 |
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| Duarte, Gisele Silva Costa; Alves, Geziele Mucio; Lansac-Tôha, Fernando Miranda; Velho, Luiz Felipe Machado; Lansac-Tôha, Fábio Amodêo. |
| In some Bromeliaceae species the leaf sheaths form a tank or phytotelma, accumulating water and organic detritus, conditions that allow the establishment of different communities. Thus, this study evaluated the relationship between diameter and volume of water in the tank of the bromeliad Aechmea distichantha Lem. and density of flagellates found in the phytotelmata, as well as the influence of the hydrological periods and proximity of sampled strata on the phytotelma patterns of abundance distribution. Samplings were conducted in two hydrological periods in 2010. In each sampling, four plants were collected from three different strata, classified according to the distance from the river level. A one-way ANOVA identified significant differences in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecologia/Ecologia de Ecossistemas Phytotelma; Protozoa; Bromeliad; Rocky walls Ecologia de Protoplâncton. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/17134 |
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| Le Gall, Solange; Bel Hassen, Malika; Le Gall, Pierre. |
| The linked concepts of 'microbial loop' and 'protozoan trophic link' have been very well documented in filter-feeding microzooplankton such as copepods, but have not been applied to energy transfer to benthic suspension-feeding macrofauna, with the exception of the recent demonstration of heterotrophic flagellate assimilation by mussels. The oyster Crassostrea gigas obtains energy resources by filtering microalgae (similar to 5 to 100 mu m). However, in turbid estuaries, light-limited phytoplanktonic production cannot entirely account for oyster energy requirements. Conversely, picoplankters (<2 mu m), which are main effecters of coastal energy flow and matter cycling, are not efficiently retained by oyster filtration. Ciliate protozoal as both... |
| Tipo: Text |
Palavras-chave: Oyster; Food sources; Picoplankton; Protozoa; Trophic link. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00337/44788/44482.pdf |
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| Lee, Yun Sik; Chung, In Bai; Choi, Won Hyung; Cho, Yoo Jung; Chu, Jong Phil; Min, Byung-Il; Shin, Eun-Hee. |
| Meliae cortex (Melia azedarach Linne. var. japonica Makino, M. toosendan Siebold & Zucc) is one of the herbs used in oriental medicine for the treatment of various types of vaginitis. The present study was performed to examine the effects of Meliae cortex extracts on the growth and fine structure of Trichomonas vaginalis (T. vaginalis). Meliae cortex dose-dependently reduced the viability of T. vaginalis. In the electron microscopy study, we also observed the ultrastructural changes of T. vaginalis following the treatment with Meliae cortex. One to two hours after the addition of the extract of Meliae cortex, the movement of flagella and axostyle decreased, but the cell death did not occur. The fine structure of the cytoplasm was changed 30 min to 2... |
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Palavras-chave: Trichomonas vaginalis; Meliae cortex; Meliae azedarach; Inhibition of cell multiplication; Protozoa; Ultra structure. |
| Ano: 2007 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1051 |
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| Milozzi,Carola; Bruno,Gabriela; Cundom,Elisa; Mudry,Marta D; Navone,Graciela T. |
| Endoparasitic infections are common in nonhuman primates and important factors in regulating their natural populations. Primates are particularly vulnerable to the infections of directly transmitted parasites because they often live in close social groups that facilitate their transmission. The main objective of this study was to provide baseline data on gastrointestinal parasites of semi captive and wild howler monkeys Alouatta caraya troops from Argentina. We collected 110 fecal samples from 38 howler monkeys from four troops, two of them kept in semi-captivity at the CRMAN, Córdoba, and two wild troops from Las Lomas, Corrientes. We identified six species of parasites: four Protozoa, Giardia lamblia, Blastocystis hominis, Eimeria sp. and Entamoeba coli;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alouatta caraya; Argentina; Helminths; Protozoa. |
| Ano: 2012 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832012000200006 |
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| Nahrevanian,Hossein. |
| Nitric oxide (NO) is a potent mediator with diverse roles in regulating cellular functions and signaling pathways. The NO synthase (NOS) enzyme family consists of three major isoforms, which convey variety of messages between cells, including signals for vasorelaxation, neurotransmission and cytotoxicity. This family of enzymes are generally classified as neuronal NOS (nNOS), endothelial NOS (eNOS) and inducible NOS (iNOS). Increased levels of NO are induced from iNOS during infection; while eNOS and nNOS may be produced at the baseline in normal conditions. An association of some key cytokines appears to be essential for NOS gene regulation in the immunity of infections. Accumulating evidence indicates that parasitic diseases are commonly associated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: INOS; Nitric oxide; NO; Immunity; Helminth; Parasite; Protozoa. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702009000600010 |
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| GENNARI,Solange Maria; KASAI,Nobuko; PENA,Hilda Fátima de Jesus; CORTEZ,Adriana. |
| Foram examinadas, pelo Laboratório de Doenças Parasitárias do Departamento de Medicina Veterinária Preventiva e Saúde Animal, da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, no período de janeiro de 1991 a janeiro de 1995, amostras de 353 cães e de 187 gatos, com idades variadas e de diferentes áreas da cidade de São Paulo. Os métodos de diagnóstico empregados foram: centrífugo-flutuação em solução de sacarose e centrífugo-sedimentação em água-éter. Aproximadamente 45,0% das amostras de cães examinadas (160 amostras) apresentaram-se positivas e o percentual de ocorrência de parasitos, em relação ao total de amostras foi: Ancylostoma spp. 20,40; Toxocara canis 8,49; Giardia sp. 7,65; Cryptosporidium parvum 2,83; Cystoisospora... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cães; Gatos; Helmintos; Protozoa. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95961999000200006 |
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| Mostajir, B; Bustillos-guzman, J; Claustre, H; Rassoulzadegan, F. |
| The egestion of particulate material as well as pigment degradation during microzooplankton grazing on phytoplankton are poorly known processes. In an attempt to evaluate these processes, changes in pigment concentrations within various size fractions were monitored in batch cultures of an assemblage of a pelagic ciliate (Strombidium sulcatum) and a heterotrophic flagellate (Paraphysomonas sp.) feeding on a cyanobacterium (Synechococcus sp.) over a 10-day period. Chlorophyll a, carotenoids and phaeopigments were not found in the 0.1-0.7 mu m fraction while the pigments originally in the 0.7-3.0 mu m fraction (prey) were transferred into the > 3.0 mu m size fraction (predator). During this transfer, the carotenoids (zeaxanthin and B-carotene) were not... |
| Tipo: Text |
Palavras-chave: Pigment; Phéopigment; Broutage; Protozoaire; HPLC; Pigment; Phaeopigment; Grazing; Protozoa; HPLC. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00325/43660/43209.pdf |
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| Vidigal, Tiago Mateus Andrade; Landivar, Elaine Eloiza Cortellini. |
| Consuming raw food like lettuce may carry protozoa cysts and helminth eggs, causing parasitic infections. Therefore, the parasitological analysis of this type of food it’s important for public health because it provides data on the hygiene conditions in which these vegetables were produced, transported, processed and handled until the ingestion. This study aimed to evaluate the occurrence of parasitic structures in samples of lettuce (Lactuca sativa) sold in self-service restaurants in São Miguel do Oeste, Santa Catarina State, Brazil. The samples were randomly collected in 20 locations in duplicate, prepared according to the method of Hoffman, Pons, and Janer (1934) and analyzed with an optical light microscopy. The parasitic structures found were Cysts... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Protozoa; Helminths; Contamination; Food; Vegetables.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/35027 |
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| Registros recuperados: 32 | |
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