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A methodological proposal for the recovery of palynomorphs from snow and ice samples Acta Botanica
Rodrigues,Luiz Antonio da Costa; Agostini,Kamila da Matta; Alencar,Alexandre Santos de; Mendonça,Cláudia Barbieri Ferreira; Carvalho,Marcelo Araújo de; Gonçalves-Esteves,Vania.
ABSTRACT The procedures for a set of techniques to recover grains of pollen 26 and spores from liquid samples are described. Liquefied samples of matrices, such as melting lakes, snow and ice, can provide a record of climatic and environmental events at different geographic and temporal scales. The need for standardization of techniques was demonstrated in research carried out with matrices of snow and water of thawing lakes and snow collected on King George and Joinville islands (Antarctica). The use of the methods described can permit increased rescue of palynomorphs from liquid matrices, thereby adding greater reliability to palynological data and its use as a biotracer of environmental events. Methods of sieving and centrifugation were tested, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antarctica; Ice; Spores; Snow; Technique to recover grains of pollen.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400667
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A new framework for managing and analyzing multiply imputed data in Stata AgEcon
Carlin, John B.; Galati, John C.; Royston, Patrick.
A new set of tools is described for performing analyses of an ensemble of datasets that includes multiple copies of the original data with imputations of missing values, as required for the method of multiple imputation. The tools replace those originally developed by the authors. They are based on a simple data management paradigm in which the imputed datasets are all stored along with the original data in a single dataset with a vertically stacked format, as proposed by Royston in his ice and micombine commands. Stacking into a single dataset simplifies the management of the imputed datasets compared with storing them individually. Analysis and manipulation of the stacked datasets is performed with a new prefix command, mim, which can accommodate data...
Tipo: Article Palavras-chave: Mim; Mimstack; Ice; Micombine; Miset; Mifit; Multiple imputation; Missing data; Missing at random; Research Methods/ Statistical Methods.
Ano: 2008 URL: http://purl.umn.edu/120928
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Analyses microbiologiques et chimiques des produits de la pêche et de l'eau OceanDocs
Diouf, Sidiya.
Ce rapport porte principalement sur la microbiologie, la chaîne biochimie des aliments et des eaux au terme d'un stage d'un mois effectué au Laboratoire de Sécurité Alimentaire et d'Hygiène de l'Environnement (LSAHE) de l'Institut Pasteur de Dakar. Nous avons donné quelques notions générales sur: (1) les différents germes recherchés dans: - le poisson (frais ou transformé); germes capables d'altérer la qualité marchande du poisson (la flore totale à 30 ° C); - germes potentiellement pathogènes (ASR, Salmonellea, Staphylococcus); - germes témoins de contamination fécale (coliformes fécaux); - germes indicateurs technologiques (coliformes totaux entérobactéries). (2) l'eau et la glcae: - germes capables d'altérer la qualité marchande de l'eau (la flore...
Tipo: Report Palavras-chave: Microbiological analysis; Fish; Water analysis; Ice; Hygiene; Quality control; Fish; Ice; Microbiological analysis; Water analysis; Hygiene; Http://aims.fao.org/aos/agrovoc/c_15903; Http://aims.fao.org/aos/agrovoc/c_3782; Http://aims.fao.org/aos/agrovoc/c_25302; Http://aims.fao.org/aos/agrovoc/c_16064; Http://aims.fao.org/aos/agrovoc/c_3739.
Ano: 2001 URL: http://hdl.handle.net/1834/4074
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Cambios bioquímicos post-mortem en músculos de diferentes especies pesqueras. Determinación de la vida útil de las mismas en frío OceanDocs
Massa, A.E..
Se investigaron los cambios bioquímicos post-mortem y se determinó la vida útil comercial de tres especies pesqueras, muy valoradas por el sector industrial pesquero de nuestro país, durante el almacenamiento en frío: lenguado (Paralichthys patagonicus), corvina rubia (Micropogonias furnieri) y la vieira patagónica (Zygochlamis patagónica). Los cambios bioquímicos relacionados con el ATP y sus productos de degradación, la actividad de las principales enzimas involucradas en el catabolismo del ATP y el pH fueron investigados. En base a los contenidos de los compuestos relacionados con la degradación del ATP se establecieron distintos índices químicos para evaluar la frescura y/o la calidad de estos productos. Por otro lado, se monitorearon los niveles de...
Tipo: Theses and Dissertations Palavras-chave: Ice; Muscles; Fish spoilage; Analytical techniques; Analytical techniques; Ice; Muscles; Http://aims.fao.org/aos/agrovoc/c_28584; Http://aims.fao.org/aos/agrovoc/c_3782; Http://aims.fao.org/aos/agrovoc/c_5003.
Ano: 2006 URL: http://hdl.handle.net/1834/2602
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Comparative study on phase changing material for refrigeration effect for milk chilling CIGR Journal
Sharma, Amandeep; Gupta, Silvy; Kaur, Kulwinder.
 In developed countries the milking collection is done to process in various diary plants situated far away from production areas.  There is a problem of cool chain management, which, generally is absent at farm levels.  To manage the cool chain in milk transportation system right from farm level it is required that some locally available techniques/materials should be selected and used for milk chilling.  The objective of current study is to ascertain mechanism for chilling of milk at farm immediately after milking.  The experiments were conducted and the cooling performance was evaluated by noting down the drop in temperature with respect to time using mercury thermometer.  The respective regression equation and R2 value were obtained for every run of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: PCM; Ice; Milk; Insulation; Temperature drop; Time.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2890
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Effects of pressure ridge sheltering on the spatial and temporal variability of boundary layer stability under first year sea ice ArchiMer
Hudier, E; Ingram, G.
We present series of data describing the small-scale structure of the boundary layer stratification in the vicinity and away from a 1.5 m pressure ridge keel. We then analyze the influence of pressure ridges on the spatial and temporal variability of the ocean boundary layer Our experiment was done during the melt in order to use small-scale salinity gradients to study the variability in intensity of mixing processes. High-resolution salinity records sampled at 0+, 25 and 50 cm from the ice-water interface were analyzed at two stations, one at 5 m and the other at 75 m from a pressure ridge keel. We observed that, in the immediate vicinity of the ridge, melting is associated with the periodic development and dissipation of a melt layer in relation with the...
Tipo: Text Palavras-chave: Glace; Rugosité; Couche limite; Diffusion turbulente; Ice; Roughness; Boundary layer; Eddy diffusivity.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43598/43981.pdf
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Multiple imputation of missing values: further update of ice, with an emphasis on interval censoring AgEcon
Royston, Patrick.
Multiple imputation of missing data continues to be a topic of considerable interest and importance to applied researchers. In this article, the ice package for multiple imputation is further updated. Special attention in this article is paid to imputing interval-censored observations, and a suggestion to use imputation of right-censored survival data to elucidate covariate effects graphically.
Tipo: Article Palavras-chave: Ice; Uvis; Micombine; Ice_reformat; Multiple imputation; Interval censoring; Visualization; Censored survival data; Research Methods/ Statistical Methods.
Ano: 2007 URL: http://purl.umn.edu/119290
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Multiple imputation of missing values: update AgEcon
Royston, Patrick.
This article describes a substantial update to mvis, which brings it more closely in line with the feature set of S. van Buuren and C. G. M. Oudshoorn’s implementation of the MICE system in R and S-PLUS (for details, see http://www.multiple-imputation.com). To make a clear distinction from mvis, the principal program of the new Stata release is called ice. I will give details of how to use the new features and a practical illustrative example using real data. All the facilities of mvis are retained by ice. Some improvements to micombine for computing estimates from multiply imputed datasets are also described.
Tipo: Journal Article Palavras-chave: Ice; Mvis; Uvis; Micombine; Mijoin; Misplit; Missing data; Missing at random; Multiple imputation; Multivariate imputation; Regression modeling; Research Methods/ Statistical Methods.
Ano: 2005 URL: http://purl.umn.edu/117511
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Multiple imputation of missing values: Update of ice AgEcon
Royston, Patrick.
Royston (2004) introduced mvis, an implementation for Stata of MICE, a method of multiple multivariate imputation of missing values under missing-at-random (MAR) assumptions. In a second article, Royston (2005) described ice, an upgrade incorporating various improvements and changes to the software based on personal experience, discussion with colleagues, and user requests. This article describes an update to ice. The changes are less substantial but nevertheless important enough to warrant a brief explanation. The major modification is that the default method of imputing missing values in ice is now by sampling from the posterior predictive distribution rather than by predicted mean matching. The ice system comprises five ado-files: ice, micombine,...
Tipo: Journal Article Palavras-chave: Ice; Uvis; Multiple imputation; Missing values; Update; Research Methods/ Statistical Methods.
Ano: 2005 URL: http://purl.umn.edu/117543
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The Benefits of the Ka-Band as Evidenced from the SARAL/AltiKa Altimetric Mission: Scientific Applications ArchiMer
Verron, Jacques; Bonnefond, Pascal; Aouf, Lofti; Birol, Florence; Bhowmick, Suchandra A.; Calmant, Stephane; Conchy, Taina; Cretaux, Jean-francois; Dibarboure, Gerald; Dubey, A. K.; Faugere, Yannice; Guerreiro, Kevin; Gupta, P. K.; Hamon, Mathieu; Jebri, Fatma; Kumar, Raj; Morrow, Rosemary; Pascual, Ananda; Pujol, Marie-isabelle; Remy, Elisabeth; Remy, Frederique; Smith, Walter H. F.; Tournadre, Jean; Vergara, Oscar.
The India-France SARAL/AltiKa mission is the first Ka-band altimetric mission dedicated primarily to oceanography. The mission objectives were firstly the observation of the oceanic mesoscales but also global and regional sea level monitoring, including the coastal zone, data assimilation, and operational oceanography. SARAL/AltiKa proved also to be a great opportunity for inland waters applications, for observing ice sheet or icebergs, as well as for geodetic investigations. The mission ended its nominal phase after three years in orbit and began a new phase (drifting orbit) in July 2016. The objective of this paper is to highlight some of the most remarkable achievements of the SARAL/AltiKa mission in terms of scientific applications. Compared to the...
Tipo: Text Palavras-chave: Altimetry; Ka-band; Oceanography; Hydrology; Ice; Geodesy.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00600/71248/69623.pdf
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Океанографические условия и экологические проблемы Керченского пролива IBSS Repository
Еремеев, В. Н.; Иванов, В. А.; Ильин, Ю. П..
Изложены основные особенности океанографического режима Керченского пролива, в том числе ветрового волнения, колебаний уровня моря, системы течений и водообмена, ледового режима, гидрохимических условий, транспорта наносов. Выделены существующие и потенциальные экологические проблемы, связанные с зарегулированием водообмена через пролив. Это дает основу для предварительного качественного анализа возможных последствий антропогенного вмешательства в сложную морскую экосистему, в частности – строительства дамбы в Тузлинской промоине.
Tipo: Journal Contribution Palavras-chave: Экосистема; Керченский пролив; Ветровое волнение; Уровень моря; Течения; Водообмен; Ледовый режим; Транспорт наносов; Эвтрофикация; Ecosystem; The Kerch Strait; Wind disturbance; Sea level; Currents; Water exchange; Ice; Alluviums transport; Eutrophication Eutrophication Ice Water exchange Sea level Eutrophication Ice Sea level http://aims.fao.org/aos/agrovoc/c_2734 http://aims.fao.org/aos/agrovoc/c_3782 http://aims.fao.org/aos/agrovoc/c_34115.
Ano: 2003 URL: http://repository.ibss.org.ua/dspace/handle/99011/150
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