Academic literature on the topic 'Laitue – Conservation'
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Journal articles on the topic "Laitue – Conservation"
Arseneau, Isabelle. "La condition du pastiche dans le roman lyrico-narratif de Jean Renart (Le Roman de la Rose ou de Guillaume de Dole)." Études françaises 46, no. 3 (December 21, 2010): 99–122. http://dx.doi.org/10.7202/045120ar.
Full textDUQUET, J. P., Anne TROUVAT, Ariette MOUNIQUA, G. ODET, and O. CERF. "Les spores thermorésistantes du lait utilisé pour la fabrication de laits de longue conservation." Le Lait 67, no. 3 (1987): 393–401. http://dx.doi.org/10.1051/lait:1987323.
Full textBosset, J. O., P. U. Gallmann, and R. Sieber. "Influence de la translucidité de l'emballage sur la conservation du lait et des produits laitiers." Le Lait 73, no. 1 (1993): 3–49. http://dx.doi.org/10.1051/lait:199311.
Full textMiara, Mohamed Djamel, Mohammed Ait Hammou, and Khellaf Rebbas. "Flore endemique, rare et menacees de l'Atlas Tellien Occidental de Tiaret (Algerie)." Acta Botanica Malacitana 42, no. 2 (February 20, 2018): 269–83. http://dx.doi.org/10.24310/abm.v42i2.3590.
Full textGrillet, Nelly, Patrice Grimaud, Gérard Loiseau, Milton Wesuta, and Bernard Faye. "Qualité sanitaire du lait cru tout au long de la filière dans le district de Mbarara et la ville de Kampala en Ouganda." Revue d’élevage et de médecine vétérinaire des pays tropicaux 58, no. 4 (April 1, 2005): 245. http://dx.doi.org/10.19182/remvt.9919.
Full textMoyer, G. R., M. S. Blouin, and M. A. Banks. "The influence of family-correlated survival on Nb/N for progeny from integrated multi- and single-generation hatchery stocks of coho salmon (Oncorhynchus kisutch)." Canadian Journal of Fisheries and Aquatic Sciences 64, no. 9 (September 1, 2007): 1258–65. http://dx.doi.org/10.1139/f07-099.
Full textLanglois, Annabelle, Raymond Archambault, Renée Lebeuf, Jean-Pierre Turgon, Raymond McNeil, and Jacques Brisson. "Inventaire des macromycètes d’une forêt ancienne de la région du Haut-Saint-Laurent." Le Naturaliste canadien 137, no. 2 (May 10, 2013): 62–77. http://dx.doi.org/10.7202/1015517ar.
Full textFogarasi, Barbara, and Andrea Dúll. "Inside the Mind and Heart of Homo Aedificator •." Építés - Építészettudomány 49, no. 1-2 (March 15, 2021): 267–87. http://dx.doi.org/10.1556/096.2021.00009.
Full textMarkert, Bernd, Simone Wünschmann, and Edita Baltrėnaitė. "INNOVATIVE OBSERVATION OF THE ENVIRONMENT. BIOINDICATORS AND BIOMONITORS: DEFINITIONS, STRATEGIES AND APPLICATIONS / APLINKOS STEBĖSENOS NAUJOVĖS. BIOINDIKATORIAI IR BIOMONITORIAI: APIBRĖŽTYS, STRATEGIJOS IR TAIKYMAS." Journal of Environmental Engineering and Landscape Management 20, no. 3 (October 8, 2012): 221–39. http://dx.doi.org/10.3846/16486897.2011.633338.
Full textBaltrėnas, Pranas, and Dovilė Vaitkutė. "INVESTIGATION AND EVALUATION OF COPPER AND ZINC CONCENTRATION TENDENCIES IN PINUS SYLVESTRIS L. TREE-RINGS / VARIO IR CINKO KONCENTRACIJOS KAUPIMOSI TENDENCIJOS PINUS SYLVESTRIS L. METINĖSE RIEVĖSE TYRIMAI IR VERTINIMAS / ИССЛЕДОВАНИЕ И ОЦЕНКА ИЗМЕНЕНИЙ КОНЦЕНТРАЦИЙ МЕДИ И ЦИНКАВ ГОДОВЫХ КОЛЬЦАХ PINUS SYLVESTRIS L." Journal of Environmental Engineering and Landscape Management 19, no. 4 (December 21, 2011): 278–86. http://dx.doi.org/10.3846/16486897.2011.634418.
Full textDissertations / Theses on the topic "Laitue – Conservation"
Hamza, Fatoumata. "Conservation de laitues de quatrième gamme sous atmosphère contrôlée ou modifiée." Master's thesis, Université Laval, 1993. http://hdl.handle.net/20.500.11794/29169.
Full textSADOUN, BENMEDJEBER DJAMILA. "Le probleme de la conservation des produits lactes : interet des techniques par ionisation." Strasbourg 1, 1987. http://www.theses.fr/1987STR13188.
Full textBouyer, Amandine, and Amandine Bouyer. "Impact du type de fluide laitier sur les performances du procédé d'osmose inverse pour la production d'eau de procédé." Master's thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/38130.
Full textEn industrie de transformation laitière, 6.3 litres d’eau potable sont en moyenne nécessaires pour traiter 1 litre de lait. Au Québec cela correspond à l’utilisation de 13,6 millions de m³ d’eau par année pour le secteur de la transformation laitière soit 160,000 m³ d’eau en moyenne par usine. Cette consommation pourrait cependant être considérablement réduite si l’eau, principal constituant du lait (teneur moyenne de 88%), était valorisée à diverses fins dans les usines de transformation (eau potable, vapeur alimentaire, eau de rinçage, préparation de solution lavage). Il est connu que l’osmose inverse (OI) permet d’extraire une partie de l’eau des fluides laitiers. Des traitements physiques ou chimiques additionnels sont cependant nécessaires pour contrôler les qualités physico-chimiques et microbiologiques de l’eau en fonction des usages prévus en usine, mais également afin de se conformer aux exigences règlementaires. Ainsi, le présent projet visait à identifier les conditions de concentration par OI des fluides laitiers (lait, lactosérum, perméat d’ultrafiltration) qui permettent de générer différentes eaux de procédé tout en minimisant la consommation énergétique. Nos travaux visaient également à générer des données technico-économiques relativement à la production en interne d’eaux des procédés à partir de fluides laitiers convnetionnels en industrie soient le lait, le perméat d’ultrafiltration et le lactosérum issu de transformation fromagère. Les données expérimentales générées ont permis de démontrer que l’OI seule n’était pas suffisante pour générer de l’eau de procédé avec une conductivité acceptable pour la réutilisation, à savoir inférieure à 10μS/cm. Combiné au procédé de polissage, le processus de récupération d’eau atteint en revanche des performances de réduction de la conductivité supérieure à 99,9%. Sur l’ensemble des résultats générés, le scénario du perméat d’UF présentait les meilleures performances opératoires et économiques dans le cadre de l’étude pilote. En effet, du point de vue des performances générales de filtration, les flux de perméation, les besoins énergétiques et les coûts d’opération sont notamment dépendants de la complexité en matière de composition du fluide considéré. Le choix du fluide à partir duquel la récupération d’eau se fait doit cependant prendre en compte l’ensemble du procédé de transformation du lait afin d’améliorer au mieux l’éco-efficience des usines.
The processing of 1 liter of milk requires 6.3 liters of drinking water. As a consequence, in Quebec the dairy industry uses on average 13.6 million m³ of water per year, about 160,000 m³ of water per plant. As the milk contains mostly water (88%), drinking water consumption could be reduced if the cow water was valued in dairies, for instance reused as process water (as drinking water, heat transfer vector, rinsing, washing). Indeed most of the water contained in milk can be extracted by reverse osmosis (RO) processing. Depending on its final utilization, physical or chemical treatments are required to ensure the microbiological and chemical safety of the water, then to meet the quality requirements for the water reclaimed from milk. In this way, our project aimed at identifying the optimal conditions for concentration of dairy fluids (milk, whey, UF permeate) by RO to produce high-potential water for several purposes in the plant and minimize the energy use. Our work intent was also to generate technical and economic data relating to the processing of cow water. Experimental datas showed that a single RO step was not sufficient to produce process water winth an accepatable conductivity for reuse (<10μS/cm). However RO/polishing steps allowed to reach a 99.9% reduction of conductivity in the water produced. UF permeate sequence reached the best operating and economic performances at pilot scale. Indeed, overall filtration performances as permeation flux, energetic consumption and economic cost depended on the composition of the different fluids. The reclaiming and recycling water process from dairy fluids must take into account the overal dairy processing to improve the eco-efficiency in dairy plants.
The processing of 1 liter of milk requires 6.3 liters of drinking water. As a consequence, in Quebec the dairy industry uses on average 13.6 million m³ of water per year, about 160,000 m³ of water per plant. As the milk contains mostly water (88%), drinking water consumption could be reduced if the cow water was valued in dairies, for instance reused as process water (as drinking water, heat transfer vector, rinsing, washing). Indeed most of the water contained in milk can be extracted by reverse osmosis (RO) processing. Depending on its final utilization, physical or chemical treatments are required to ensure the microbiological and chemical safety of the water, then to meet the quality requirements for the water reclaimed from milk. In this way, our project aimed at identifying the optimal conditions for concentration of dairy fluids (milk, whey, UF permeate) by RO to produce high-potential water for several purposes in the plant and minimize the energy use. Our work intent was also to generate technical and economic data relating to the processing of cow water. Experimental datas showed that a single RO step was not sufficient to produce process water winth an accepatable conductivity for reuse (<10μS/cm). However RO/polishing steps allowed to reach a 99.9% reduction of conductivity in the water produced. UF permeate sequence reached the best operating and economic performances at pilot scale. Indeed, overall filtration performances as permeation flux, energetic consumption and economic cost depended on the composition of the different fluids. The reclaiming and recycling water process from dairy fluids must take into account the overal dairy processing to improve the eco-efficiency in dairy plants.
Negim, Osama. "New Technique for Soil Reclamation and Conservation: In Situ Stabilization of Trace Elements in Contaminated Soils." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2009. http://tel.archives-ouvertes.fr/tel-00408020.
Full textDelavenne, Emilie. "Propriétés antifongiques de bactéries lactiques isolées de laits crus." Thesis, Brest, 2012. http://www.theses.fr/2012BRES0085/document.
Full textFermented dairy products such as yogurt, fermented milks and fresh cheeses are of great importance in the French economy. The stability of these products and export opportunities are however limited by frequent fungal spoilages. In addition, the increase of fungal resistances to Chemical preservatives and the strong consumer demand for products deprived of Chemical additives are pushing manufacturers to reduce the quantities of added Chemical preservatives in these products. In this context, it is necessary to develop alternatives to classical food preservation methods, such as biopreservation. Lactic acid bacteria (LAB), used for millennia for diverse food fermentations, and generally recognized as safe for human health, can potentially be used for biopreservation. In order to select 1 or 2 LAB strains with antifungal activity capable to compete in fermented dairy products such as yogurt, a collection of antifungal LAB was first created. This was done by screening colonies isolated from cow, goat and ewe raw milk samples over a one-year period. This screening step, targeted against 4 fungi found in contaminated dairy products, resulted in the isolation of 1235 antifungal colonies. The biodiversity of the isolated antifungal LAB was then determined along with that of the fungi found in the different raw milks, in order to observe a possible correlation between the presence of fungi and the expression of antifungal activities. The influence of milk origin, sampling period, isolation medium and targeted fungus on the percentage of isolated active colonies was highlighted and clearly showed that both cow and goat milks were reservoirs of antifungal LAB. Among the targeted fungi, P. expansum was more easily inhibited, and the majority of colonies were isolated during the third sampling period, mainly on MRS-based media. The majority of identified antifungal LAB belonged to the genus Lactobacillus, mainly to the Lb. casei group. Eleven isolates, including 10 belonging to the Lb. casei group, were selected from these lactobacilli, according to their activity level and action spectrum in MRS medium. Some of their technological properties were characterized for their potential use as protective cultures in fermented dairy products and their antifungal activity was tested in milk and yogurt. To do this, 6 fungal contaminants commonly encountered in yogurt spoilage were used. A particular strain, Lb. harbinensis K.V9.3.1Np, showed a strong antifungal activity in yogurt. Additional experiments showed that the variation of technological parameters (presence or absence of sugar, fermentation time) had no influence on the antifungal activity of this strain. This is the first time that an antifungal potential has been observed for Lb. harbinensis, a species isolated for the first time in 2005 from a fermented vegetable product. Because of its effectiveness in yogurt, Lb. harbinensis K.V9.3.1Np is a promising strain for biopreservation of fermented dairy product(s)
Thomas, Marie. "Influence de l'activité de l'eau sur les interactions lactose / β-lactoglobuline de poudres laitières modèles lyophilisées." Vandoeuvre-les-Nancy, INPL, 2004. http://docnum.univ-lorraine.fr/public/INPL_T_2004_THOMAS_M.pdf.
Full textModel milk powders were prepared by co-lyophilization of lactose and β-lactoglobulin and stored at various water activities (aw) to better understand interactions between the two components in a dehydrated state. The presence of β-lactoglobulin influenced the critical aw where physico-chemical modifications like non-enzymatic browning, particles caking and particularly lactose crystallization, occurred. Moisture sorption isotherms, differential scanning calorimetry and X-ray diffraction demonstrated that β-lactoglobulin can both delay crystallization and increase crystallization aw to 0. 54 and even 0. 59 in model powders containing 10 to 30%, and 40% β-lactoglobulin respectively, compared to 0. 43 for pure lactose crystallization. This stabilizing effect was due to the development ofboth covalent interactions and hydrogen bonding between lactose and β-lactoglobulin, as shown by non-enzymatic browning and spectroscopic studies. When model powders were stored at the aw just below their critical aw, preferential protein hydration occurred: hydrogen bonding between lactose and β- lactoglobulin decreased, whereas it increased between water and β-lactoglobulin. This change in hydrogen bonding seems to be responsible for the stabilizing effect against crystallization observed in model milk powders
Haratifar, Sanaz. "The stability of electro-reduced milk lipids." Thesis, Université Laval, 2009. http://www.theses.ulaval.ca/2009/25960/25960.pdf.
Full textNasser, Sarah. "Evolution des propriétés structurales et fonctionnelles des poudres de PPCN en lien avec l’état initial et les conditions de vieillissement." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10224/document.
Full textDuring storage, the functional (rehydration) and sensory (color) properties of the milk protein powders can alter, especially when the casein content of the powder is high. Understanding the mechanisms of structural changes at the molecular level that are at the origin of those property changes of casein-concentrated powders represents an important challenge for the dairy industry and hence the objective of this thesis. For this purpose, powders of micellar casein (MC) with or without lactose were stored up to 12 months at 4, 20, 40 and 60 ° C. Evolutions of secondary structures, compound migrations, chemical modifications as well as the evolution of functional and sensory properties were determined experimentally.The analysis of the results demonstrated the possibility to predict i) the ageing trajectory of the MC powders stored at ambient temperature by applying accelerated aging conditions; ii) the total rehydration time using the experimental tests that we proposed.The secondary structural changes at the origin of protein destabilization as well as different chemical modifications (acetylation, deamidation, lactosylation, dephosphorylation) were identified according to the composition. It was established that the aggregation of the caseins on the particle surface slowed down their dispersion into the aqueous medium, resulting in an increase of rehydration time. Finally, it has been established that the absence of lactose does not prevent protein destabilization or formation of insoluble matter, but it does prevent browning
Brahma, Abdelmalek. "Etude des variations dimensionnelles spontannes des sables-laitiers en cours d'hydratation." Toulouse 3, 1986. http://www.theses.fr/1986TOU30123.
Full text(9722096), Avril M. Harder. "Declining populations in changing environments: adaptive responses, genetic diversity, and conservation." Thesis, 2020.
Find full textMany salmonid populations are supported through captive breeding programs in which hatchery production supplies fish for reintroduction or supplementation efforts. In Lake Champlain, Atlantic salmon (Salmo salar) are the subject of a reintroduction effort that is complicated by the occurrence of thiamine (vitamin B1) deficiency in adult salmon returning to spawn. This deficiency results in high offspring mortality rates that must be mitigated by hatchery interventions (reviewed in Chapter 1). I used an experimental transcriptomics approach coupled with survival analyses to assess genetic variation in thiamine deficiency outcomes (i.e., survival at the family level) and identified candidate genes that may comprise a putatively adaptive response to selection imposed by thiamine deficiency (Chapter 2). Using sequence data from this study, I next compared patterns of genetic variation in the Lake Champlain population against two other populations to identify signatures of selection associated with hatchery rearing environment and differences in life history strategies (Chapter 3). Finally, I surveyed salmonid populations for density-dependent effects of adult spawning density on per capita fitness and found that in many cases, hatchery releases can contribute to decreased individual fitness. Using genotype data for returning adults in multiple populations, I also tested for reductions in effective population size (Ne) associated with hatchery supplementation and describe how increasing hatchery contribution to a population decreases Ne (Chapter 4). Together, my results demonstrate the powerful influences of hatchery supplementation on salmonid populations and suggest that specific modifications to hatchery practices can limit negative impacts of captive breeding on population genetic and demographic characteristics.
Books on the topic "Laitue – Conservation"
Shutt, Frank T. Some of the factors that control the water-content of butter. Ottawa: Dept. of Agriculture, 1997.
Find full textKeeley, Theresa. Reagan's Gun-Toting Nuns. Cornell University Press, 2020. http://dx.doi.org/10.7591/cornell/9781501750755.001.0001.
Full textLedger-Lomas, Michael. Unitarians and Presbyterians. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199683710.003.0005.
Full textBook chapters on the topic "Laitue – Conservation"
Pfeifer, Michael J. "Holy Cross on West Forty-Second and the Transformation of New York City’s Irish American Catholicism." In The Making of American Catholicism, 131–64. NYU Press, 2021. http://dx.doi.org/10.18574/nyu/9781479829453.003.0006.
Full text"Propagated Fish in Resource Management." In Propagated Fish in Resource Management, edited by PATRICK L. HULETT, CAMERON S. SHARPE, and CHRIS W. WAGEMANN. American Fisheries Society, 2004. http://dx.doi.org/10.47886/9781888569698.ch22.
Full text"the advance of conservative evangelicalism after the Second World War. Greater attention to the continuities in the policy of evangelicalism towards Oxford and Cambridge during its period of ‘decline’ is clearly overdue. If the objectives of the Pastorate might have been predictable on the basis of long-standing evangelical tradition, its methodology seems rather unex-pected. Shaped by the model of the college tutor, the methods adopted by the Pastorate chaplains were as far away from the popular revivalist image of turn of the century evangelicalism as can be imagined. ‘We are naturally asked what methods we pursue’, noted C.S. Woodward in 1914, reflecting on the previous five years spent as a Pastorate chaplain, ‘the answer may be put in two words – personal influence.’ How was this influence brought to bear." In The Rise of the Laity in Evangelical Protestantism, 220–21. Routledge, 2003. http://dx.doi.org/10.4324/9780203166505-103.
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