Consulta: subjectFacets:"Ions"
Registros recuperados: 10
Data/hora: 16/06/2024 14:49:26

pH controls spermatozoa motility in the Pacific oyster (     Crassostrea gigas     )
Provedor de dados: 5
Autores: Boulais, Myrina; Suquet, Marc; Arsenault-pernet, Marie Eve Julie; Malo, Florent; Queau, Isabelle; Pignet, Patricia; Ratiskol, Dominique; Le Grand, Jacqueline; Huber, Matthias; Cosson, Jacky.
Investigating the roles of chemical factors stimulating and inhibiting sperm motility is required to understand the mechanisms of spermatozoa movement. In this study, we described the composition of the seminal fluid (osmotic pressure, pH, and ions) and investigated the roles of these factors and salinity in initiating spermatozoa movement in the Pacific oyster. The acidic pH of the gonad (5.82 ± 0.22) maintained sperm in the quiescent stage and initiation of flagellar movement was triggered by a sudden increase of spermatozoa external pH (pHe) when released in seawater (SW). At pH 6.4, percentage of motile spermatozoa was three times higher when they were activated in SW containing 30 mM NH4Cl, which alkalinizes internal pH (pHi) of spermatozoa, compared...
Tipo: Text
Palavras-chave: Seminal fluid; Spermatozoa; Motility; PH; Salinity; Ions.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00428/53976/55137.pdf

Incidence de la salinite sur les equilibres de distribution hydrique et ioniques et sur le metabolisme respiratoire dans le muscle blanc, le muscle rouge et la branchie chez le muge Chelon labrosus
Provedor de dados: 5
Autores: Gallis, J; Piquemal, S; Lambert, J; Sergent, P; Rousseau, V.
Oxygen consumption, water, K super(+) and Na super(+) contents were measured in white muscle, red muscle and gill epithelium in the mullet Chelon labrosus) in relation with the duration of fresh water or sea water (1500mOsm) adaptation. The unit respiratory activities in gill and red muscle where respectively 5 and 3 timesmore elevated than in white muscle. The pericellular K super(+)/Na super(+) ratio of the 3 tissues decreased with the fresh water adaptation duration. In the gill, the intracellular K super(+)/Na super(+) ratio was stable while the parameter decreased strongly in the white muscle. The results are discussed in relation to energetic cost of homocellular regulation and homoepithelial regulation.
Tipo: Text
Palavras-chave: Chelon labrosus; Mugilidae; Pisces; Gills; Muscles; Oxygen consumption; Respiration; Ions; Water balance; Osmoregulation; Salinity effects.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1251.pdf

Marine fish spermatozoa: racing ephemeral swimmers
Provedor de dados: 5
Autores: Cosson, J; Groison, A; Suquet, Marc; Fauvel, Christian; Dreanno, Catherine; Billard, R.
After along period of spermatogenesis (several weeks to months), marine fish spermatozoa are delivered at male spawning in seawater (SW) at the same time as ova. In some fish species, as the ova micropyle closes quickly after release, these minute unicells, the spermatozoa, have to accomplish their task of reaching the micropyle within a very brief period (several seconds to minutes), for delivery of the haploid male genetic information to the ova. To achieve this goal, their high-performance motile equipment, the flagellum, must fully activate immediately on contact with the SW and then propel the sperm cell at an unusually high initial velocity. The cost of such 'hyperactivity' is a very rapid consumption of intracellular ATP that outstrips the supply....
Tipo: Text
Palavras-chave: Cell activation; Osmolality; Ions; Cell energetics; Motility; Spermatozoon; Marine fish.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6967.pdf

Etude preliminaire des equilibres de distribution de l'eau et des ions au cours de l'ovogenese de Solea solea
Provedor de dados: 5
Autores: Gallis, J; Lemenn, F; Lebrun, A; Nunez, R.
During oogenesis of Solea solea L., gonadal changes in water, Na super(+) and K super(+) ions seem to be related to yolk protein incorporation by the oocyte. The decrease in oocyte water accumulation, associated with an increase in pericellular water accumluation and a decrease in K super(+) concentration occurs when vitellogenin enters the oocyte. Na super(+) concentration decreases in the oocyte at the end of the exogenous vitellogenesis when the first stages of the oocyte maturation take place. Water accumulation in the pericellular space during vitellogenesis allows the rapid transfer of water from this compartment into the oocyte during the terminal phase of maturation. However the total amount of gonadal water remains stable.
Tipo: Text
Palavras-chave: Solea solea; Soleidae; Pisces; Hydration; Water content; Ion accumulation; Sexual maturity; Ovaries; Oogenesis; Solea; Maturation ovocytaire; Ovogenèse; Eau; Ions.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1231.pdf

MEASUREMENT OF BRADYKININ, PROTEIN, Na+, Cl-, K+, AND Zn++ CONCENTRATIONS IN RAT URINE AFTER INTRAPERITONEAL INJECTION OF Tityus serrulatus VENOM
Provedor de dados: 79
Autores: FERREIRA,L. A. F.; BERGAMASCO,M.; ANGNES,L.
Experiments were carried out in vivo by injecting Tityus serrulatus crude venom in rats followed by biological assays on the isolated guinea-pig ileum, to show the effects of scorpion venom on kallikrein-kinin system. Our results showed effects such as significant decrease of total kinin rate and a decrease of Zn&lt;img SRC="image2229.gif"&gt; , Na&lt;img SRC="image2227.gif"&gt; , Cl&lt;img SRC="image2228.gif"&gt; and K&lt;img SRC="image2227.gif"&gt; ions in rat urine 24 and 48 hours after the injection of Tityus serrulatus crude venom.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Protein; Ions.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79301996000200008

Efeito do período de envelhecimento acelerado no teste de condutividade elétrica e na qualidade fisiológica de sementes de feijão
Provedor de dados: 1
Autores: Binotti, Flávio Ferreira da Silva; UNESP; Haga, Kuniko Iwamoto; UNESP; Cardoso, Eliana Duarte; UNESP; Alves, Charline Zaratin; UNESP; Sá, Marco Eustáquio de; UNESP; Arf, Orivaldo; UNESP.
A qualidade das sementes colocadas à disposição do produtor é de grande importância para obtenção de altas produtividades. O objetivo do trabalho foi avaliar os efeitos causados por diferentes períodos de envelhecimento artificial na lixiviação de açúcares, proteínas, aminoácidos e íons no exsudato do teste de condutividade elétrica, e suas relações com a germinação e vigor de sementes de feijão da cultivar Pérola. O trabalho foi conduzido no Laboratório da FE de análises de sementes - Unesp Campus de Ilha Solteira. O delineamento experimental foi o inteiramente casualizados, sendo que as sementes foram submetidas a oito períodos de envelhecimento acelerado (zero, 24, 48, 72, 96, 120, 144 e 168 horas). A germinação e vigor de sementes de feijão cultivar...
Palavras-chave: 5.01.03.05-9    Melhoramento Vegetal Phaseolus vulgaris L.; Lixiviados; Proteínas; Íons; Germinação; Vigor 5.01.03.05-9    Melhoramento Vegetal Phaseolus vulgaris L.; Leakage; Protein; Ions; Seed germination; Vigor.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1736

Transporte de juvenis de curimbatá Prochilodus lineatus em diferentes densidades - doi: 10.4025/actascianimsci.v32i2.8415
Provedor de dados: 2
Autores: Gonçalves, André Fernando Nascimento; Faculdade de Zootecnia UNESP Dracena; Takahashi, Leonardo Susumu; Faculdade de Zootecnia UNESP Dracena; Urbinati, Elisabeth Criscuolo; Centro de Aquicultura da UNESP (CAUNESP); Biller, Jaqueline Dalbello; Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV-UNESP; Fernandes, João Batista Kochenborger; Centro de Aquicultura da UNESP (CAUNESP).
Neste estudo foi avaliado o efeito do transporte de curimbatá Prochilodus lineatus, em três densidades (100, 150 e 250 g L-1), sobre a sobrevivência e variáveis metabólicas, iônicas e hematológicas (série vermelha). Juvenis de curimbatá foram transportados em sacos plásticos durante 6h e amostrados antes da embalagem, imediatamente após a chegada, 24 e 96h após o transporte. Os peixes transportados na densidade mais alta apresentaram maior mortalidade durante o período de recuperação. As variáveis físico-químicas da água: condutividade e amônia total apresentaram maiores valores quanto maior a densidade (p &lt; 0,05), enquanto no oxigênio dissolvido ocorreu o inverso. A glicemia observada na chegada estava elevada, reduzindo-se significativamente 96h...
Tipo: Pesquisa
Palavras-chave: 5.06.03.04-3; 5.04.05.02-0; 5.04.05.00-4 Prochilodus; Estresse; Hematologia; Metabólitos; Íons; Águ Piscicultura; Manejo de Animais; Produção Animal Prochilodus; Stress; Hematology; Metabolites; Ions; Water.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/8415

Biochemical changes in Salminus brasiliensis due to successive captures and stocking densities - doi: 10.4025/actascibiolsci.v35i1.13055
Provedor de dados: 3
Autores: Braun, Neiva; Universidade Federal de Santa Catarina; Lima, Ronaldo Lima de; Universidade Federal de Santa Catarina; Baldisserotto, Bernardo; Universidade Federal de Santa Maria; Dafre, Alcir Luiz; Universidade Federal de Santa Catarina; Nuñer, Alex Pires de Oliveira; Universidade Federal de Santa Catarina.
This study evaluated the biochemical changes associated to successive captures of Salminus brasiliensis reared at different stocking densities. The experiment was conducted in tanks with a capacity of  1,000 L, connected to a recirculating system with temperature control and continuous aeration. Fish were stocked at densities of 30, 150 and 300 fish m-3 and the successive catches were applied at the end of the experimental period of 80 days. The biochemical changes were evaluated at the end of the trial through the parameters: hematocrit, hemoglobin, glucose and lactate in plasma and Na+, K+ and Cl- and Ca2+ in the gills. The concentration of glucose increased with the increase of stocking density as also registered for lactate concentration, except for...
Palavras-chave: Zoologia; Fisiologia; Bioquímica dourado; Hematocrit; Hemoglobin; Glucose; Lactate; Ions.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/13055

Effect of exercise on occurrence of diurnal rhythms of plasma ions and metabolites in Thoroughbred racehorses
Provedor de dados: 45
Autores: Viana,P.C.R.; Caldas-Bussiere,M.C.; Marins,R.S.Q.S.; Menna-Barreto,L.S.; Cury,L.J.
Records of plasma calcium (Ca++), phosphorus (Pi), potassium (K+), sodium (Na+), chloride (Cl-), magnesium (Mg++), iron (Fe++), glucose, cholesterol, triglycerides and total protein levels were measured to determine the effects of exercise on occurrence of diurnal rhythms in Throughbred racehorses (n=7) under physical training. Physical activities consisted of gallop on the track and walking. Blood samples were collected from jugular vein every 4h over a 48h period. Plasma Ca++, K+, Mg++ and Na+ levels were obtained by flame photometry; and, Pi, Cl-, Fe++, glucose, cholesterol, triglycerides and total protein levels were measured by colorimetric tests using visible UV spectrophotometry. The data were analyzed using a 24h period to each exercise performed....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Horse; Chronobiology; Exercise; Ions; Metabolites; Diurnal rhythms.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352007000400006

Osmotic adjustment in roots and leaves of two sorghum genotypes under NaCl stress
Provedor de dados: 61
Autores: Lacerda,Claudivan Feitosa de; Cambraia,José; Oliva,Marco Antonio; Ruiz,Hugo Alberto.
Seedlings of two sorghum genotypes [Sorghum bicolor (L.) Moench], one salt tolerant (CSF 20) and the other salt sensitive (CSF 18) were grown in nutrient solution containing 0, 50 and 100 mmol.L-1 NaCl for seven days and the osmotic potential (Ys) and the contribution of organic and inorganic solutes to the Ys were determined in the leaves and roots. Salinity reduced the Ys of the cellular sap of leaves and roots in both genotypes, mainly in the salt sensitive one. The higher decrease in the Ys in the salt sensitive genotype was mostly due to higher accumulation of Na+ and Cl- that probably exceeded the amount needed for the osmotic adjustment. Among the inorganic solutes, K+ contributed the most to the Ys in control unstressed seedlings, but its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ions; Organic solutes; Osmotic adjustment; Salinity; Sorghum bicolor.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000200007