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| Registros recuperados: 10 | |
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| Cyr, Frédéric; Tedetti, Marc; Besson, Florent; Beguery, Laurent; Doglioli, Andrea M.; Petrenko, Anne A.; Goutx, Madeleine. |
| The MiniFluo-UV is a new glider-compatible optical sensor for measurements of dissolved organic matter (DOM) in natural waters. The working principle, sensor design and challenges faced during the validation phase are reported. The first in situ application of the sensor during three glider deployments in the NW Mediterranean sea (spring, summer, and fall) are also presented. For these campaigns, the two channels of the sensor were adjusted to target Tryptophan-like (excitation/emission wavelengths λEx/λEm: 275/340 nm) and Phenanthrene-like (λEx/λEm: 255/360 nm) fluorescence. These were chosen because they represent fluorophores of interest commonly found in seawater. While Tryptophan (an amino-acid believed to be a by-product of biological activity) is... |
| Tipo: Text |
Palavras-chave: MiniFluo-UV; Fluorescence; Glider; Dissolved organic matter; Tryptophan; Phenanthrene; Mediterranean Sea. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00654/76597/77747.pdf |
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| Rosas Valencia, Uriel. |
| El picoteo en aves es un problema que se presenta con frecuencia en las granjas avícolas, pudiendo causar la muerte de las mismas. El despicado de las aves es una práctica común para evitarlo pero que causa estrés en los animales, reduciéndose el consumo y afectándose su productividad. Una alternativa para disminuir el picoteo y evitar el despicado es suplementar triptófano en la dieta por arriba del requerimiento establecido. El objetivo de este trabajo fue determinar si disminuye la frecuencia de picoteo en gallinas de la línea Bovans, en etapa de postura, cuando se agrega triptófano a la dieta por arriba del requerimiento, así como evaluar algunas variables productivas. Se evaluaron los siguientes tratamientos: (T1 sin despicar, T2 despicado; con 1.6 g... |
| Tipo: Tesis |
Palavras-chave: Triptófano; Conducta de picoteo; Corte de pico; Maestría; Ganadería; Tryptophan; Pecking behavior; Beak trimming. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/1329 |
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| Bao,Chengman; Tang,Xinhui; Ye,Shuming. |
| ABSTRACT The effect of pressure on the fluorescence of tryptophan in the presence of metal ions was studied by fluorescence spectrometry. It was found that at 60 MPa, the fluorescence intensity of M/Trp mixtures (M represented metal ions) increased compared to that at atmosphere pressure. The relative fluorescence efficiency of M/Trp mixtures increased with pressure. When the M/Trp ratio was above 10:1, the relative fluorescence efficiency in decreasing order was Cu2+/Trp mixtures, Ni2+/Trp mixtures and Mg2+ (K+)/Trp mixtures. When the ratio was below 10:1, the decreasing order was Cu2+/Trp mixtures and Ni2+ (Mg2+, K+)/Trp mixtures. The relative fluorescence efficiency increased with the concentration of Cu2+ and Ni2+. The variation was relate to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrostatic pressure; Tryptophan; Fluorescence; Metal ions. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100605 |
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| Ignjatovic-Micic,Dragana; Kostadinovic,Marija; Bozinovic,Sofija; Andjelkovic,Violeta; Vancetovic,Jelena. |
| Maize (Zea mays L.) landraces are an important source of genes for improving commercial germplasm. Today, drought tolerance and grain quality are major challenges in maize cultivation due to climatic changes and population growth. The Maize Research Institute genebank has a drought tolerant collection, which includes 13 landraces (from the former Yugoslavia) and 12 introduced populations (from different countries). These accessions were analyzed for protein, oil, starch and tryptophan contents, in order to identify drought tolerant accessions with high grain quality. Also, simple sequence repeat (SSR) analysis with specific primers for opaque2 recessive allele (o2) was carried out. All analyzed accessions showed high levels of protein. Oil content ranged... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Opaque2; Protein; Starch; Oil; Tryptophan. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000500009 |
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| Castro,W.; Bueno Sánchez,J.C.; Piedrahita-Ochoa,C.; Cadavid J.,A.P.. |
| Enrichment of culture media with amino acids improves embryo development. However, little is known about the specific action of each amino acid during embryogenesis. The present study was undertaken to examine the effect of L-glutamine (Gln) and tryptophan (Trp) on mouse embryo hatching, expansion and viability in vitro. Blastocysts were collected from 6- to 8-week-old female BALB/c mice (N = 30) and cultured in M2 medium containing either 0.125, 0.25 or 0.5 mM Trp, 1 mM Gln, or M2 alone. Gln significantly increased (100%; P < 0.05) blastocyst hatching at 24 h compared to M2 alone or Trp; moreover, Trp inhibited blastocyst hatching when compared to M2 alone (P < 0.05) at 72 h. In contrast, the percentage of embryos reaching the state of expanded... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Embryo development; Murine blastocyst; Hatching; Glutamine; Tryptophan. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000800003 |
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| Oliveira,Olga M.M.F.; Brunetti,Iguatemy L.; Khalil,Najeh M.. |
| In this study, the effect of nicotine on the LDL oxidation by the MPO/H2O2/Cl- system and the effect of HOCl on LDL and some of its components, such as methyl linoleate, vitamin E and the amino acid tryptophan were explored. Nicotine, in micromolar concentrations, enhanced the tryptophan oxidation, either present in LDL or free, in solution. Nicotine also decreased the formation of conjugated dienes and oxygen consumption in a methyl linoleate / HOCl system, and there was evidence to suggest an increase in chlorohydrin formation. Acceleration of the vitamin E oxidation by HOCl was also observed in the presence of nicotine. These data show that the interaction of nicotine and HOCl can promote significant biochemical modifications in LDL particle and some of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nicotine; Myeloperoxidase; Hypochlorous acid; Low-density lipoprotein; Methyl linoleate; Vitamin E; Tryptophan. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100183 |
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| Dawood, Mona Gergis. |
| The physiological effect of melatonin, IAA and their precursor (tryptophan) as seed priming on quantity and quality of chickpea plants was investigated during two growing seasons of 2013/2014 and 2014/2015 under sandy soil conditions at the Research and Production Station, National Research Centre, Nubaria Province, Behaira Governorate, Egypt. Data show that melatonin treatments showed the most pronounced effect on vegetative growth parameters followed by IAA and tryptophan treatments. The highest significant increase in dry weight of shoot/plant was achieved by melatonin treatments at 0.5 and 1.0mM. Moreover, melatonin treatments at 0.25 and 0.5 mM were the most pronounced treatments caused the highest significant increase in total photosynthetic pigments... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Melatonin; IAA; Tryptophan; Chickpea; Sandy soil. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4377 |
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| Registros recuperados: 10 | |
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