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Registros recuperados: 40
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A PRELIMINARY STUDY FOR ELIMINATION OF CONTAMINATED BABESIA MICROTI FROM THE MODEL OF HUMAN PLASMA FRACTION OAK
Nishisaka, M.; Igarashi, Ikuo; Fujisaki, Kozo; Miyahara, T.; Ogata, Y.; Nagasawa, Hideyuki; Mikami, Takeshi.
Palavras-chave: Babesia microti; Human plasma fraction; Filtration.
Ano: 2002 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/629
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Acquisition de donnée en continu sur la matière particulaire de la Baie estuarienne de Marennes-Oléron pendant le bloom printaniter planctonique : effet sur le taux de filtration de l'huître Crassostrea gigas ArchiMer
Heral, Maurice; Razet, Daniel; Prou, Jean.
The continuous obtention of different signals has been achieved for 9 days at a -fixed station during May 1988. The speed and direction of the currents have been monitoring concurrently with "in situ" turbidity and fluorescence in relation with the meteorological conditions. The concentration in particulate matter and the planktonic fluorescence fluctuated in direct relation with the water depth, the speed of the current and with the origin of the water masses. The oysters submitted to these large fluctuated conditions showed not constant filtration rate. The filtration calculated by turbidimeters (2 1 h-l g-1 dry weight) was three time less than the one achieved with fluorimeters (61 h-l g-1 dry weight). The filtration rate were fluctuated but not in...
Tipo: Text Palavras-chave: France; Marennes Oleron bay; Acquirring of continous data; Filtration; Crassostrea gigas; Particular matter; Marennes Oléron; Aquisition données; Courantologie; Filtration; Crassostrea gigas; Matière particulaire.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-3021.pdf
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Bilan énergétique de l'huître creuse (Crassostrea gigas) durant la période de forte croissance en mai en Baie de Marennes-Oléron (France) ArchiMer
Soletchnik, Patrick; Heral, Maurice; Razet, Daniel; Bougrier, Serge; Geairon, Philippe.
Ecophysiological study was conducted on the japanese oyster (Crassostrea gigas) reared in Marennes-Oléron bay (France), during May 1992. Most of the somatic growth of the oyster occured during that month. The measurements were achieved from a removable laboratory stated in Le Chapus for 3 days at different tide level (coefficient of 49, 57, and 88). The food conditions were monitored through a computer with a continuous record of the turbidity during aIl the tidal cycle. In spite of an important variation between the food conditions in mean seston load, from 13,5 to 54,6 mg/!, the available organic matter ranged from 3 to 4,9 mg/l. The rate of organic matter in the water ranged 22 % to 9 %. The organic selection efficiency was significantly higher for the...
Tipo: Text Palavras-chave: Energetic budget; Selection efficiency; Filtration; Crassostrea gigas; Budget énergétique; Sélection; Consommation; Crassostrea gigas.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/1993/acte-3068.pdf
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Capacité des moules dans la réduction des teneurs en nutriments et la charge bactérienne dans les effluents piscicoles OceanDocs
Chebil Ajjabi, L.; Romdhane, M.S.; El Abed, A..
L’effluent des élevages de poissons renferme des concentrations plus élevées en nutriments dissous et en particules en suspension que celles présentes dans l’eau entrante. Cet état entraine par conséquent, des problèmes d’ordre environnementaux affectant les eaux côtières dues à l’eutrophisation et l’augmentation de la turbidité. Afin d’améliorer la qualité de l’effluent avant son déversement dans le milieu naturel, l’utilisation des bivalves comme filtre biologique est une alternative adéquate. Cette étude analyse la capacité de la moule Mytilus galloprovincialis de réduire les teneurs en sels nutritifs et la charge bactérienne dans les effluents de loups Dicentrarchus labrax en élevage. L’effluent issu des bassins de grossissement est pompé directement...
Tipo: Journal Contribution Palavras-chave: Aquaculture effluents; Bacteria; Biofilters; Chlorophylls; Chlorophylls; Culture effects; Density; Effluents; Filtration; Fish; Mussel culture; Nitrogen; Nutrients (mineral); Phosphorus; Suspended particulate matter; Wastewater recycling; Wastewater treatment; Water quality; Fish; Nitrogen; Phosphorus; Water quality; Mussels; Nutrients; Bacteria; Chlorophylls; Density; Effluents; Filtration; Wastewater treatment.
Ano: 2008 URL: http://hdl.handle.net/1834/3756
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Capacité des moules dans la réduction des teneurs en nutriments et la charge bactérienne dans les effluents piscicoles OceanDocs
Romdhane, M.S.; Chebil Ajjabi, L.; El Abed, O..
L’effluent des élevages de poissons renferme des concentrations plus élevées en nutriments dissous et en particules en suspension que celles présentes dans l’eau entrante. Cet état entraine par conséquent, des problèmes d’ordre environnementaux affectant les eaux côtières dues à l’eutrophisation et l’augmentation de la turbidité. Afin d’améliorer la qualité de l’effluent avant son déversement dans le milieu naturel, l’utilisation des bivalves comme filtre biologique est une alternative adéquate. Cette étude analyse la capacité de la moule Mytilus galloprovincialis de réduire les teneurs en sels nutritifs et la charge bactérienne dans les effluents de loups Dicentrarchus labrax en élevage. L’effluent issu des bassins de grossissement est pompé directement...
Tipo: Journal Contribution Palavras-chave: Aquaculture effluents; Bacteria; Biofilters; Chlorophylls; Culture effects; Density; Effluents; Filtration; Fish; Mussel fisheries; Nitrogen; Nutrients (mineral); Phosphorus; Suspended particulate matter; Wastewater treatment; Water quality; Mytilus galloprovincialis; Wastewater treatment; Mussels; Nutrients; Http://aims.fao.org/aos/agrovoc/c_31155; Http://aims.fao.org/aos/agrovoc/c_25312; Http://aims.fao.org/aos/agrovoc/c_5010; Http://aims.fao.org/aos/agrovoc/c_5274.
Ano: 2008 URL: http://hdl.handle.net/1834/4154
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Characteristics of the particulate matter during the Mai '92 experiment. Effect on ecophysiological functions on mussel and oyster populations. ArchiMer
Prou, Jean; Soletchnik, Patrick; Heral, Maurice; Geairon, Philippe; Razet, Daniel; Bougrier, Serge.
In order to complete the knowledge of seasonal variability of ecophysiological parameters, in situ experiment was conducted in May 1992 at the sampling site "Le Chapus". As in the previous experiments (May '91, October '91 and February '92), the race-way technique was used to study ecophysiological behavior of oyster and mussel populations submitted to natural variability.
Tipo: Text Palavras-chave: Pacific cupped oyster; Crassotrea gigas; Particulate matter; Pigments; Particle size distribution; Retention; Filtration; Mytilus edulis.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00100/21091/18715.pdf
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Comparaison de la filtration entre une population de Crassostrea angulata Lmk et une population de Crassostrea gigas Thunberg élevées dans le bassin d'Arcachon ArchiMer
His, Edouard.
L'introduction d'une nouvelle espèce en ostréiculture donne souvent lieu à des débats passionnés dans les milieux ostréicoles. Un exemple est donné par Charles Martin, parqueur du Bassin d'Arcachon, dans son ouvrage "Agriculteur de la mer"; il rapporte les mesures restrictives qu'avait entraînées l'introduction de l'huître portugaise à Arcachon au début du 20ème siècle. Un des arguments avancés pour expliquer les réticences était celui de la "concurrence vitale" et de la compétition sur le plan nutritionnel (filtration) entre C. angulata et Ostrea edulis: cette dernière espèce était alors seule exploitée dans le bassin. Il fallut attendre l'épizootie de 1920, qui anéantit presque totalement l'huître plate, pour que la portugaise soit définitivement admise.
Tipo: Text Palavras-chave: Ostréiculture; Crassostrea gigas; Crassostrea angulata; Filtration; Bassin Arcachon; Gironde.
Ano: 1970 URL: http://archimer.ifremer.fr/doc/00009/11978/8682.pdf
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Crepidula fornicata L. dans le bassin de Marennes-Oléron - Rapport 1984 ArchiMer
Deslous Paoli, Jean-marc.
Dans le bassin de Marennes- Oléron , Crepidula fornicata a principalement colonisé trois secteurs (les bords du banc de Charret, le courant d'Oléron, les abords de l'Estrée) à des densités dépassant 2 500 individus au mètre carré, mais aussi présente de façon diffuse dans tout le nord du bassin. La biomasse estimée, pour les deux premiers secteurs, est d'environ 3 700 tonnes dont 1 500 tonnes ont été draguées et rejetées à terre en 1983. Il semble par ailleurs qu'il y ait un début d'infestation des gisements à Pecten maximus dans le pertuis d'Antioche. La courbe de croissance moyenne de Crepidula fornicata a été définie en fonction de l'âge (Lc = 78,79 (1 - e - 0,439(t - 0,347)) , et , du fait de la correspondance âge-position dans les associations en...
Tipo: Text Palavras-chave: Crepidula fornicata; Répartition géographique; Dynamique de population; Biodéposition; Biologie; Filtration; Bassin de Marennes Oléron.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/00092/20357/18018.pdf
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Desenvolvimento e avaliacao de um filtro de areia confeccionado em material de baixo custo para uso em irrigacao localizada. Repositório Alice
FEITOSA FILHO, J. C.; LOPES, W. F.; CAVALCANTE, L. F.; SILVA, I. de F. da; LOPES, W. F.; LEITE JUNIOR, G. P.; PINTO, J. M..
O trabalho teve como objetivos: a) desenvolver um filtro de areia confecionado com tubo de ferro e avaliar sua eficiência na filtragem de água para irrigação b) estudar fatores que afetam a filtragem considerando tipos. proporções de materiais filtrantes. taxas e sentido do fluxo; c) quantificar as perdas de cargas d) analisar custo de construção do filtro. Os materiais filtrantes foram brita, areia e carvão vegetal. O sentido do fluxo foi da parte superior para a base do filtro e o oposto. Trabalhou-se nas pressões de 98.06; 122.57; .147.09; 171.60; 196.12; 220.63 kPa. A eficiência no sistema dependeu de quatro fatores: quantidade das impurezas presentes na água. tipo do material filtrante, sentido do fluxo da água no filtro e no tempo de funcionamento do...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Filtro de areia; Construcao; Filtragem; Localized irrigation; Sand filters; Construction; Cost; Água; Custo; Irrigação Localizada; Filtration; Water.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/134227
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Design and Construction of an Affordable Potable Water Treatment Unit for Domestic Usage CIGR Journal
Isikwue, Martins Okechukwu; Ato, Jeremiah A.; Ayua, Isaac T..
An affordable potable water treatment unit was designed and constructed. The components were coagulation unit, sedimentation unit, slow sand filter unit, utraviolet unit and the storage unit. Filtrate from the chamber was compared with International acceptable standards. The result showed that the treatment chamber proved effective and can produce at least 100 litres of portable water per day. The physical and chemical parameters monitored were reduced to the acceptable limit by WHO (World Health Organisation), NAFDAC(National Agency for Food and Drug Administration and Control) Nigeria and Nigerian Standard for Drinking Water Quality (NSDWQ). However, coliform was not totally removed but the count was reduced by 99.4%.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Land and Water Management; Water Quality; Raw water; Filtration; Treatment; Potable water; Domestic usage.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2872
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Design and Construction of an Affordable Potable Water Treatment Unit for Domestic Usage CIGR Journal
Martins Okechukwu Isikwue; Dept of Agric & Environmental Engineering, University of Agriculture, Makurdi, Nigeria; Jeremiah A. Ato; Dept of Agric & Environmental Engineering, Univ. of Agric Makurdi; Isaac T. Ayua; Agric. & Environmental Engineering, Univ. of Agriculture Makurdi.
An affordable potable water treatment unit was designed and constructed. The components were coagulation unit, sedimentation unit, slow sand filter unit, utraviolet unit and the storage unit. Filtrate from the chamber was compared with International acceptable standards. The result showed that the treatment chamber proved effective and can produce at least 100 litres of portable water per day. The physical and chemical parameters monitored were reduced to the acceptable limit by WHO (World Health Organisation), NAFDAC(National Agency for Food and Drug Administration and Control) Nigeria and Nigerian Standard for Drinking Water Quality (NSDWQ). However, coliform was not totally removed but the count was reduced by 99.4%.
Palavras-chave: Land and Water Management; Water Quality; Raw water; Filtration; Treatment; Potable water; Domestic usage.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2872
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Ecophysiologie de la maturation sexuelle et de la ponte de l'huître creuse Crassostrea gigas : réponses métaboliques (respiration) et alimentaires (filtration, absorption) en fonction des différents stades de maturation ArchiMer
Soletchnik, Patrick; Razet, Daniel; Geairon, Philippe; Faury, Nicole; Goulletquer, Philippe.
The study of maturation and spawning of the oyster is part of a research program to investigate the summer mortalities of the oysters, Crassostrea gigas in Marennes-Oléron Bay. Four maturity stages were simultaneously obtained by diet and thermal conditioning (immature, low maturation, mature and post-spawning stages). Measurements of clearance, filtration, absorption and respiration rates allowed a calculation of the scope for growth and hence an estimation of the oyster's energetic budget at various maturity stages. Male and female oysters had similar physiological responses. The filtration rate ranged from 2.4 to 2.6 1.h(-1) at the early stages of maturation and decreased to 1.8 1.h.' during the maturity stage. Growth rate resulting from gonad...
Tipo: Text Palavras-chave: Huître; Crassostrea gigas; Conditionnement; Maturation; Filtration; Absorption; Respiration; Oyster; Crassostrea gigas; Conditioning; Maturation; Filtration; Absorption and respiration rates.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/1997/publication-3090.pdf
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Effet des biodépôts de l'huître Crassostrea gigas (Thunberg) sur l'accumulation de matières organiques dans les parcs du bassin de Marennes-Oléron ArchiMer
Sornin, Jean-marc; Feuillet, Michelle; Heral, Maurice; Deslous-paoli, Jean-marc.
The accumulation of biodeposits brings about geochemical modifications of the underlying sediment, that are noticeable. The increase can reach 83% of the amount of organic carbon. By catching the deposits on the spot and by gathering them directly from the oyster tables we get a daily deposit that can weigh, according to season, between 8 and 99 g of carbon a square meter. The recycling of important quantities of organic matter increase the oxygen needs and the most reducing environment provides opportunities for ammonification and reduction of sulfate into sulfur. So we can consider that there is as much as 4 times more sulfurous hydrogen in intensive oyster-growing areas. This output of sulfurs seems to cause the oyster filtration some damage (Ito et...
Tipo: Text Palavras-chave: Marennes Oleron; Sediment; Oysters; Physiology; Filtration; Biodeposits; Crassostrea gigas; Marennes Oléron; Sédiment; Huître; Physilogie; Filtration; Biodépôts; Crassostrea gigas.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-2955.pdf
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Etude comparée des performances des divers systèmes d'aération en bassins conchylicoles. Premiers essais ArchiMer
Fouche, Dominique; Boiron, Philippe.
On constate actuellement une profusion d'appareils d'aération en vente sur le marché. En même temps, il apparaît nécessaire pour les professionnels de la conchyliculture de s'équiper convenablement pour éviter l'apparition de mortalités en bassins de finition. Ceci impose donc la mise en place de suivis d'efficacité des différents systèmes utilisés, dans les conditions de travail de la profession en ce qui concerne le stockage des mollusques bivalves. Les premiers résultats permettent de classer quatre systèmes en terme d'efficacité, mais ne permettent pas encore de proposer des rythmes d'utilisation journaliers en toutes saisons. D'autres études en cours répondront à ce problème. Des résultats des mesures effectuées sur l'eau et sur les mollusques, il se...
Tipo: Text Palavras-chave: Aérateurs; Crassostrea gigas; Bassin de finition; Respiration; Filtration.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00423/53401/54273.pdf
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Etude des relations allométriques de l'huître plate (Ostrea edulis) relatives à la filtration et à la sonsommation d'oxygène en fonction de la température ArchiMer
Haure, Joel; Baud, Jean-pierre; Bougrier, Serge.
Introducing new species for shellfish farming is essential for expanding farmers' markets and for minimising the pathological risks that endangers professional marine aquaculture activities, which traditionally rely on only one species. Ifremer's Aquaculture and Pathological Genetics (GAP) laboratory participates in the mollusc genetics network (REGEMO). Since 1989, this network has been carrying out a selection programme for resistance or tolerance to Bonamia ostreae in European flat oysters (Ostrea edulis) to revitalize cultivation of this species on a national level.
Tipo: Text Palavras-chave: Température; Oxygène; Filtration; Ostrea edulis; Allométrie.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/1997/acte-3254.pdf
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Etude ecophysiologique de quelques mollusques bivalves ArchiMer
Riva, A; Masse, H.
Using an experimental flowing system, the filtration rate of Mytilus galloprovincialis, Ostrea edulis, Ruditapes decussatus and Ruditapes aureus has been measured by an indirect technique under Mediterranean thermal conditions in coastal open sea. The oxygen consumption and excretion rate of ammonia have been estimated and influence of temperature and salinity tested for M. galloprovincialis . The results are discussed and compared to literature data.
Tipo: Text Palavras-chave: Ruditapes decussatus; Ostrea edulis; Mytilus galloprovincialis; Bivalvia; Respiration; Excretion; Oxygen consumption; Water filtration; Ecophysiology; Méditerranéee; Excrétion; Respiration; Filtration; Bivalves.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1177.pdf
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Experimental study of filtration activity in Ditrupa arietina (Annelida Polychaeta) using an automated image analysis system ArchiMer
Duchene, Jean Claude; Jordana, Esther; Charles, François; Gremare, Antoine; Amouroux, Jean Michel.
An automated image analysis system designed to assess the activity of benthic organisms is described. This system is used to study filtration in the serpulid polychaete Ditrupa arietina. The video sensor of the system is composed of a black and white charged coupled device, a microprocessor, a memory and an interface board. It is driven by real-time routines, which are downloaded in permanent memory prior to each experiment. These routines control picture acquisition frequency and compute the differences in grey levels between the image recorded at a given time and a reference image (corresponding to no filtration in the case of D. arietina). These differences are used to detect numerical objects, which are stored in the memory board. At the end of each...
Tipo: Text Palavras-chave: Polychètes; Analyse d'images; Activité; Filtration; Polychaetes; Image analysis; Activity; Filtration.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00323/43377/42834.pdf
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Hydrocyclone for pre-filtering of irrigation water Scientia Agricola
Soccol,Olívio José; Botrel,Tarlei Arriel.
The use of water containing suspended sediments causes serious problems to irrigation systems. Choosing the right filtering system type and capacity is essential to avoid increases in operational and maintenance costs of irrigation resulting from the need for cleaning and frequent component replacing. Pre-filters, such as the hydrocyclone, are important for their significant capability of retaining particles suspended in the water. Data on hydrocyclones performance for pre-filtering of irrigation water can be found in the literature, but research data in Brazil are scarce. Therefore, four Rietema type hydrocyclones (50 mm diameter) were constructed, one with circular-end and the other three presenting rectangular-end feeding tubes. The evaluation of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Filtration; Cyclones; Centrifugal separator.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200002
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Impact of Brown Ring Disease on the energy budget of the Manila clam Ruditapes philippinarum ArchiMer
Flye Sainte Marie, Jonathan; Pouvreau, Stephane; Paillard, Christine; Jean, Fred.
Brown Ring Disease (BRD) is a bacterial disease caused by the pathogen, Vibrio tapetis. The disease induces formation of a brown deposit on inner shell of the Manila clam, Ruditapes philippinarum. Development of this disease is correlated with a decrease in the condition index of infected clams. Experiments were conduced in order to assess the effect of the development of BRD on two parameters affecting the energy balance of the clams: the clearance and the respiration rates. Experiments were performed in a physiological measurement system that allowed simultaneous measures of clearance and respiration rates. During both acclimation and measurements clams were fed with cultured T-iso and temperature was close to seasonal field temperature (10 degrees C....
Tipo: Text Palavras-chave: Ruditapes philippinarum; Respiration rate; Filtration; Energy budget; Clearance rate; Brown Ring Disease.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3013.pdf
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Influence de la charge particulaire sur la filtration d'une population d'huître Crassostrea gigas dans le bassin estuarien de Marennes-Oléron (France) : analyse de deux cycle de marée ArchiMer
Soletchnik, Patrick; Prou, Jean; Heral, Maurice; Barille, Laurent; Razet, Daniel; Guezennec, Loïc.
Filtration of oyster population (100 animals) have been followed during 16 days in raceway systems with continuous recorder of the input and output of the raceway for in situ turbidity and fluorescence. Experimental conditions were fluctuated with particulate matter which varied during a tidal cycle from 40 mg.l-1to 300 mg.l-1. During the same period the phytoplanktonic biomass presented synchronous variations form 7 to 20 µg.l-1 bound with sediment resuspension of phytobenthos and oyster biodeposit created by alternating currents. Filtration of oyster population during a neap tide cycle, variated between 1.2 and 2.8I.h-1 by animal for a calculated retention based on turbidity and between 2.4 and 4.8 l.h-1 by animal for a retention calculated with...
Tipo: Text Palavras-chave: Marée; Charge particulaire; Marennes Oléron; Physiologie; Filtration; Crassostrea gigas; Huîtres.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/acte-3059.pdf
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