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| Registros recuperados: 143 | |
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| Boeckx,Pascal; Vervaet,Hilde; Cleemput,Oswald van. |
| Nitrous oxide (N2O) and nitric oxide (NO) are important atmospheric trace gases, and soils (including forest soils) are a substantial source of both gases. In forests subjected to elevated N deposition these emissions are considered as indirect emissions from agricultural N sources (mainly NH3) or combustion (e.g. NOx from traffic). However, knowledge about N2O and NO exchange between forests and the atmosphere is scarce. The aim of this study was to determine N2O and NO emission rates from a deciduous forest in Belgium, receiving a high N-deposition (ca. 40 kg N ha-1 yr-1). In April 2000, the NO emission from the forested location was 17.3 (± 1.2) and 17.05 (± 0.7) ng NO-N m-2 s-1, respectively, for the soil including the organic layer and the mineral... |
| Tipo: Journal article |
Palavras-chave: Emission; Forest soil; Nitrogen; Cycling; Nitric oxide; Nitrous oxide. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200003 |
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| Comesana, Pilar; Casas, Sandra M.; Cao, Asuncion; Abollo, Elvira; Arzul, Isabelle; Morga, Benjamin; Villalba, Antonio. |
| Farming of the flat oyster Ostrea edulis in Europe is severely constrained by the protozoan Bonamia ostreae. The introduction of the resistant species Crassostrea gigas has been a relief for the farmers, while the pilot programmes to select O. edulis strains resistant to bonamiosis performed in various countries can be seen as a promising strategy to minimise the effects of bonamiosis. However, the physiological bases of this differential susceptibility remain unknown. A search for an explanation of the intra and interspecific differences in oyster susceptibility to bonamiosis was accomplished by comparing some immune parameters among various O. edulis stocks and C gigas. On December 2003, naive and Bonamia-relatively resistant flat oysters from Ireland.... |
| Tipo: Text |
Palavras-chave: Ostrea edulis; Crassostrea gigas; Bonamia ostreae; Haemocyte; Phagocytosis; Respiratory burst; Nitric oxide. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00074/18501/16092.pdf |
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| Vezilier, Julien; Nicot, Antoine; De Lorgeril, Julien; Gandon, Sylvain; Rivero, Ana. |
| Because of their role as vectors of diseases, the evolution of insecticide resistance in mosquitoes has been intensively investigated. Insecticide resistance is associated to a wide range of pleiotropic effects on several key life-history traits of mosquitoes such as longevity and behavior. However, despite its potential implications in pathogen transmission, the effects of insecticide resistance on mosquito immunity have received little, if any, attention. Here, we investigate the impact of insecticide resistance in Culex pipiens, an epidemiologically important vector of a wide array of pathogens. Using both isogenic laboratory strains and field-caught mosquitoes, we investigate the impact of two main insecticide resistance mechanisms (metabolic... |
| Tipo: Text |
Palavras-chave: Acetylcholinesterase; Anopheles; Antimicrobial peptide; Carboxylesterases; Nitric oxide; Transferrin. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00136/24773/22845.pdf |
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| Meirelles Pereira,Leila Maria; Gonçalves Bezerra,Daniele; Mandarim-de-Lacerda,Carlos Alberto. |
| Forty mature male rats (Wistar strain) were maintained alive for 40 days, separated in four groups of five rats each (Control, L-NAME, L-NAME + Enalapril, L-NAME + Verapamil). Three aortic wall parameters were analyzed, as follows: the Q A(SMN) (the number of the tunica media smooth muscle nuclear profiles per area), the S V(lamellae) (surface density of the aortic lamellae), and the aortic wall thickness (AWT). Rats of the L-NAME group showed high blood pressure and cardiac hypertrophy. The AWT, the Q A(SMN) and the S V(lamellae) showed the same tendency among the groups. The increased AWT, or the reduced Q A(SMN) and the S V(lamellae) in l-NAME rats were not completely prevented by the administration of enalapril or verapamil. Hypertension causes the AWT... |
| Tipo: Journal article |
Palavras-chave: Nitric oxide; Aorta; Enalapril; Verapamil; Stereology. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022003000100002 |
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| ORSI,R.O.; FUNARI,S.R.C.; SOARES,A.M.V.C.; CALVI,S.A.; OLIVEIRA,S.L.; SFORCIN,J.M.; BANKOVA,V.. |
| Propolis has been the subject of several recent studies, with the aim of elucidating its biological and pharmacological properties. Propolis has a well-known antimicrobial activity as well as antioxidant, antitumoral, antiinflammatory, and regenerative properties, but literature about its effects on the immune response is scarce. The goal of this work was to evaluate the propolis effect on macrophage activation by oxygen (H2O2) and nitrogen (NO) metabolite determination. Propolis was produced by africanized honeybees and hydroalcoholic solutions were prepared at different concentrations. Peritoneal macrophages were obtained from male BALB/c mice and culture cells were stimulated in vitro with propolis or interferon-gamma (IFN-gamma). In the in vivo assay,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Propolis; Macrophages; Hydrogen peroxide; Nitric oxide. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302000000200006 |
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| Sheikh Ahmadi,A; Zaghari,M; Shivazad,M; Hassanpour,H; Towhidi,A. |
| To clarify the effects of high (20 and 40% more than normal) and low (20% less than normal) daily feed allowance on egg and body parameters, ovarian morphology and plasma glucose, cholesterol, triacylglycerol, leptin-like hormone, nitrite/nitrate and gene expression of inducible nitric oxide synthase (iNOS) in the granulosa layer of F1 follicle, broiler breeder hens (30-week-old) were fed for 30 days. Egg and body parameters significantly changed between treatments (p<0.05). Effect of different level of feed intake on ovarian morphology parameters was significant (p<0.05), except for white follicles. After 30 days of experiment, plasma nitrite/nitrate (as a index of plasma nitric oxide) and leptin-like hormone increased in FI+20% and FI+40% groups as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler breeder; Follicle; Leptin-like hormone; Nitric oxide; Over/under-fed. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000400004 |
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| Fernandes, Jovanir Inês Müller; Universidade Federal do Paraná; Murakami, Alice Eiko; UEM. |
| Due to the lack of a complete urea cycle, uricotelic species, such as broilers, are not able to synthesize de novo arginine (Arg), thus depending exclusively on dietary Arg. High levels of dietary lysine (Lys) increase the demand for Arg because of the antagonistic relationship between these amino acids. The Arg-Lys antagonism promotes an expressive increase in the renal Arg activity and consequently induces the degradation of Arg and the decrease in the activity of glycine amidinotransferase, an enzyme that uses Arg in the synthesis of muscle creatin. Arg is considered an important modulator of immunological and physiological processes. The degradation of Arg produces ornithine, a precursor of polyamines that are key to cell division, DNA synthesis, and... |
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Palavras-chave: Carbamoyl phosphatase synthetase; Creatine; Immune system; Nitric oxide; Polyamines; Urea cycle carbamoyl phosphatase synthetase; Creatine; Immune system; Nitric oxide; Polyamines; Urea cycle. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10990 |
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| GUIMARÃES,JENNIFER; MARQUES,EDMILSON J.; WANDERLEY-TEIXEIRA,VALÉRIA; ALBUQUERQUE,AURISTELA C. DE; PASSOS,ELIANA M. DOS; SILVA,CÍNTHIA C.M.; TEIXEIRA,ÁLVARO A.C.. |
| This work aimed to evaluate the effects of Metarhizium anisopliae on Diatraea flavipennella and investigate their immune response. Was observed the effect of M. anisopliae against larvae of D. flavipennella sprayed at concentrations of 103, 104, 105 conidia / mL, in which showed differences relative the larval period, extending up to 72.0 days in treatment and 25.0 days in the control. The results for hemocytes revealed that the most frequent cells when sprayed at the concentrations of 103, 105, 107 conidia / mL were the prohemocytes, spherulocytes, plasmatocytes and granulocytes in relation to adipohemocytes and oenocytoids. The level of nitric oxide was different between the control and the concentration 107 spores / mL (24), while the activity of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Entomopathogen; Hemocytes; Histochemistry; Nitric oxide; Phenoloxidases; Sugarcane borer. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401973 |
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| MELO NETO,BERNARDO; LEITÃO,JOSEANA M.S.R.; OLIVEIRA,LUCIANO G.C.; SANTOS,SÉRGIO E.M.; CARNEIRO,SABRINA M.P.; RODRIGUES,KLINGER A.F.; CHAVES,MARIANA H.; ARCANJO,DANIEL D.R.; CARVALHO,FERNANDO A.A.. |
| ABSTRACT Zanthoxylum rhoifolium Lam. (Rutaceae) has been traditionally used in the treatment of microbial infections and parasitic diseases. In the present study, the antileishmanial effect induced by the ethanol extract of stem barks from Z. rhoifolium (ZR-EEtOH) and its n-hexane fraction (ZR-FHEX) on infection and infectivity of murine macrophages by promastigote forms of Leishmania amazonensis were investigated. In different set of experiments, macrophages or promastigotes were pretreated with ZR-EEtOH or ZR-FHEX at non-lethal concentrations for 24 hours, and then macrophages were submitted to infection by promastigotes. Moreover, their effects on activation of macrophages, as well as on the DNA content, size and number of promastigotes by flow... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leishmania; Macrophages; Nitric oxide; Promastigote; Phagocytic activity; Zanthoxylum. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000501851 |
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| TENÓRIO,FRANK; GIRALDI-GUIMARÃES,ARTHUR; MENDEZ-OTERO,ROSALIA. |
| Nitric oxide has several biological roles and nitric oxide synthase (NOS) is expressed in the nervous system, and co-localizes with NADPH-diaphorase. The superficial layers of the superior colliculus (SC), which receive retinal and cortical inputs, present NADPH-d staining in a sub-population of neurons that include all cell types. We have previously shown, by NADPH-diaphorase, that eye enucleation alters the intracellular distribution of NOS. Here, we studied the effect of cortical ablation on NOS expression by neurons in collicular superficial layers. Our results show that cortical ablation alters the proportion of different NOS-positive cell types, but not the intracellular distribution of the enzyme. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Superior colliculus; Nitric oxide; Visual cortex; NADPH-diaphorase. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000400008 |
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| Faraldo,A. C.; Sá-Nunes,A; Faccioli,L. H.; Del Bel,E. A.; Lello,E. |
| Although insects lack the adaptive immune response of the mammalians, they manifest effective innate immune responses, which include both cellular and humoral components. Cellular responses are mediated by hemocytes, and humoral responses include the activation of proteolytic cascades that initiate many events, including NO production. In mammals, nitric oxide synthases (NOSs) are also present in the endothelium, the brain, the adrenal glands, and the platelets. Studies on the distribution of NO-producing systems in invertebrates have revealed functional similarities between NOS in this group and vertebrates. We attempted to localize NOS activity in tissues of naïve (UIL), yeast-injected (YIL), and saline-injected (SIL) larvae of the blowfly Chrysomya... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: NO synthase; Nitric oxide; NADPH-diaphorase; Chrysomya megacephala; Blowfly; Tissues. |
| Ano: 2007 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452007000200002 |
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| Registros recuperados: 143 | |
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