Consulta: subjectFacets:"Separation"
Registros recuperados: 9
Data/hora: 03/06/2024 11:07:45

HYDROPHOBIC MEMBRANE TECHNOLOGY FOR AMMONIA EXTRACTION FROM WASTEWATERS
Provedor de dados: 70
Autores: KUNZ,AIRTON; MUKHTAR,SAQIB.
ABSTRACT Total Ammoniacal Nitrogen - TAN (NH3 + NH4+) in wastewaters cause environmental degradation concerns due to their negative impacts on air, soil and water. Several technologies are available for TAN removal from the wastewaters. One emerging technology is the use of hydrophobic membrane as non-destructive NH3 extraction. In this paper the authors discuss the uses of gas permeable membrane (GPM) and its physicochemical characteristics that influence gas mass transfer rate, diffusion and recovery mechanisms of NH3 from liquid sources (e.g. animal wastewater). Several aspects of NH3 extraction from liquid manure and other TAN generation sources using GPM technology as well as its applicability for NH3 mitigation from liquid effluents and possible...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ammonia; Separation; Wastewater; Nutrient recovery.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000200377

Efficiency of the gravity table in the processing of coriander seeds
Provedor de dados: 75
Autores: Gadotti,Gizele Ingrid; Hornke,Nander F; Cavalcante,Jerffeson A; Silva,Joseano G da; Gonçalves,Vanessa P; Capilheira,André F.
ABSTRACT This study aimed at assessing the quality of the physiology and health of the coriander seeds processed in a gravity table. This was investigated at two settings namely, I with angle X 3.5° and angle Y 3.1° and II with 3.9° and 2.7° angles, with five gravity table discharges (high, high intermediate, intermediate, low intermediate and low) besides feeding. The experiment adopted the 2x6 factorial scheme, in a completely randomized design, with four replications. Two coriander seed batches of cultivar Verdão were used. The gravity table was adjusted to have 2.9 m s-1 air speed on the platform. The seed fractions discharged in the lower portion of the gravity table revealed poorer physiological performance than that of the others. Regulation I...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coriandrum sativum; Separation; Specific mass; Physiological quality.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000200211

COLHEITA de Robustas amazônicos: lavagem e separação dos cafés para se obter mais qualidade.
Provedor de dados: 14
Este vídeo apresenta os métodos de lavagem e separação dos grãos de café para se obter mais qualidade na bebida.
Tipo: Dia de Campo na TV (INFOTECA-E)
Palavras-chave: Café Robusta; Coffea Canephora; Colheita; Lavagem; Separação; Fruto; Qualidade; Transferência de Tecnologia; Coffee beans; Harvesting; Washing; Separation; Fruit quality; Technology transfer.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1130940

Les systèmes de solvants en chromatographie de partage centrifuge
Provedor de dados: 5
Autores: Camacho-frias, E; Foucault, A.
Centrifugal partition chromatography (CPC) or countercurrent chromatography (CCC) is a kind of liquid-liquid chromatography without solid phase. Two immiscible liquids in equilibrium share the total volume of a ''column'' designed to keep one phase pseudo-stationary. A tremendous variety of biphasic systems are available, which can lead to some difficulty when a selection must be made. Ternary diagrams, describing mixtures of three solvents, and systems with four solvents or more, used by research scientists familiar with this chromatographic technique, are useful guides for a rational choosing of a biphasic system in CCC &amp; CPC.
Tipo: Text
Palavras-chave: Countercurrent chromatography; Centrifugal partition chromatography; Ternary diagram; Separation; Purification.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00282/39325/57898.pdf

Measurement of the isotopic composition of dissolved iron in the open ocean
Provedor de dados: 5
Autores: Lacan, F.; Radic, A.; Jeandel, C.; Poitrasson, F.; Sarthou, Geraldine; Pradoux, C.; Freydier, R.
This work demonstrates for the first time the feasibility of the measurement of the isotopic composition of dissolved iron in seawater for a typical open ocean Fe concentration range (0.1-1 nM). It also presents the first data of this kind. Iron is preconcentrated using a Nitriloacetic Acid Superflow resin and purified using an AG1x4 anion exchange resin. The isotopic ratios are measured with a MC-ICPMS Neptune, coupled with a desolvator (Aridus II), using a Fe-57-Fe-58 double spike mass bias correction. Measurement precision (0.13%, 2SD) allows resolving small iron isotopic composition variations within the water column, in the Atlantic sector of the Southern Ocean (from delta Fe-57 = -0.19 to +0.32 parts per thousand). Isotopically light iron found in...
Tipo: Text
Palavras-chave: MC ICP MS; Chelating resin; Southern ocean; Fractionation; Seawater; Earth; Separation; Accuracy; Pacific; FE(III).
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00202/31374/29781.pdf

Caractérisation morphologique et fonctionnelle des hémocytes chez l'huître plate, Ostrea edulis
Provedor de dados: 5
Autores: Xue, Quiggang.
The mechanism that bivalve molluscs react to infectious agents are important research subjects in the fIeld of disease control studies for these animals. While the selection of disease resistant populations have made decisive progression in some species, the mechanism behinds these resistant phenomena is not yet clear so far. However, hemocytes must represent one of the key factors in the reaction process. Based on this hypothesis, the structure and function of European flat oyster, Ostrea edulis, hemocytes have been investigated in aid of different techniques in the present study. ln addition, Pacific oyster, Crassostrea gigas, hemocytes have been analysed in certain aspects so as to provide some results for comparison. European flat oyster and Pacific...
Tipo: Text
Palavras-chave: Bivalvia; Ostrea edulis; Crassostrea gigas; Mécanismes de défense; Hémocytes; Granulocytes; Hyalinocytes; Séparation; Anticorps monoclonaux; Enzymes; Cytométrie de flux; Bivalvia; Ostrea edulis; Crassostrea gigas; Defence mechanisms; Hemocytes; Granulocytes; Hyalinocytes; Separation; Monoclonal antibodies; Enzymes; Flow cytometry.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00107/21820/19406.pdf

The Public Management of Risk: Separating Ex Ante and Ex Post Monitors
Provedor de dados: 31
Autores: Hiriart,   Yolande; Martimort,   David; Pouyet,   Jerome.
When a firm undertakes risky activities, the conflict between social and private incentives to implement safety care requires public intervention which can take the form of both monetary incentives but also ex ante or ex post monitoring, i.e., before or after an accident occurs. We delineate the optimal scope of monitoring depending on whether public monitors are benevolent or corruptible. We show that separating the ex ante and the ex post monitors increases the likelihood of ex post investigation, helps prevent capture and improves welfare.
Tipo: Working or Discussion Paper
Palavras-chave: Risk Regulation; Monitoring; Capture; Integration; Separation; Financial Economics; L51; D82.
Ano: 2010
URL: http://purl.umn.edu/98454

Oil and Agriculture in the Post-Separation Sudan
Provedor de dados: 31
Autores: Siddig,   Khalid H.A.
The Comprehensive Peace Agreement (CPA), which was signed by the government of Sudan and the Sudanese People’s Liberation Movement (SPLM) ended more than 20 years of civil war. According to the CPA, the Sudan’s government has 50% of the oil exploited from the wells existing in the south in addition to the oil produced from the northern wells. The latter represents about 30% of the total oil production in Sudan. In January 2011, the people in southern Sudan have voted for separation from the Sudan and in July 2011 the Republic of South Sudan was officially announced as Africa’s newest state.  Now the CPA period is over and the south possesses its entire production of oil, but need to use the export infrastructure that exists in the north to export it. For...
Tipo: Working Paper
Palavras-chave: Oil; Agriculture; Sudan; South Sudan; Separation; CGE modelling; Agricultural and Food Policy; Crop Production/Industries; Food Security and Poverty; International Relations/Trade; Labor and Human Capital; Land Economics/Use; Production Economics; Productivity Analysis; C6; D5; D6; F1; F2; H5; N5.
Ano: 2012
URL: http://purl.umn.edu/122341

Evaluation of a soybean threshing machine for small scale farmers
Provedor de dados: 111
Autores: Adekanye, Timothy Adesoye; Osakpamwan, Adams Blessing; Osakpamwan, Adams Blessing; Osaivbie, Idahosa Endurance; Osaivbie, Idahosa Endurance.
A soybean threshing machine was designed, fabricated and evaluated at Landmark University, Omu-Aran, Kwara State, Nigeria, to determine its performance and ease the drudgery problems associated with threshing of soybean by the small scale farmers. Evaluation was carried out with TGX 1448 soybean variety at different levels of moisture contents; 10%, 16% and 22% (wet basis) and at different drum speeds; 320 r/min, 385 r/min, 450 r/min, 515 r/min, with constant mass input of 600g and constant concave clearance of 23 mm.  The overall mean results obtained for performance indicators in terms of threshing efficiency, cleaning efficiency, percentage of damage seed, percentage of blown seeds, percentage of seed loss and throughput capacity were 99.51%, 77.91%,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering / Crop Processing soybean; Threshing; Separation; Efficiency; Small scale farmers.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3675