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Academic literature on the topic 'ChlaF'

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Published: 11 March 2023

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Journal articles on the topic "ChlaF"

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CANDOTTO CARNIEL, Fabio, Elisa PELLEGRINI, Federica BOVE, Matteo CROSERA, Gianpiero ADAMI, Cristina NALI, Giacomo LORENZINI, and Mauro TRETIACH. "Acetone washing for the removal of lichen substances affects membrane permeability." Lichenologist 49, no. 4 (July 2017): 387–95. http://dx.doi.org/10.1017/s0024282917000263.

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AbstractRemoving lichen substances from dry lichen thalli using pure acetone is the least detrimental method. Measurements of properties strictly related to the photobiont, such as chlorophyllafluorescence (ChlaF), are frequently used to verify acetone toxicity but they cannot reveal possible damage accumulated at the whole thallus level. Here, measurements of ChlaF have been integrated with others concerning the status of cell membranes and photobiont population (potassium leakage, malondialdehyde and photosynthetic pigment content). Dry thalli ofFlavoparmelia caperata,Parmotrema perlatumandXanthoria parietinawere subjected to sequential acetone washings according to standard protocols. Membrane permeability was assessed before and after the washing treatment, and after a recovery period of 48 hours. Measurements of ChlaF were taken in a parallel experiment. Acetone washings increased potassium leakage in all the species from 3·9 to 6·6 times greater than the control level. After recovery, onlyP. perlatumreturned to the control level. ChlaF was affected only inF. caperata, with a 20% decrease inFv/Fmwhich had not fully recovered after 48 hours. There was neither an increase in lipid peroxidation of membranes nor a change in the photosynthetic pigment content. The sensitivity ofF. caperatato this method and the impact of the results on its future application are discussed.
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BERTUZZI, Stefano, and Mauro TRETIACH. "Hydrogen sulphide inhibits PSII of lichen photobionts." Lichenologist 45, no. 1 (January 2013): 101–13. http://dx.doi.org/10.1017/s0024282912000667.

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AbstractThe effects of hydrogen sulphide (H2S) on five lichens with different photobionts, ecology, and tolerance to the pollutant were studied by means of samples exposed in closed chambers containing two known H2S solutions. The H2S concentration in the void volume at equilibrium with the liquid phase was measured by gas chromatography-mass spectrometry, combined with the use of solid phase micro extraction (GC/MS SPME). It was determined as 8 and 28 ppm H2S in the absence of lichen material, andc. 2 and 10 ppm H2S respectively with living lichen material inserted for 8 hours in the exposure chambers. Significant differences in the species-specific emission of chlorophyllafluorescence (ChlaF) were observed, with a pronounced depression ofFv/Fmalready detectable after 2 h exposure at 28 ppm H2S in all the species. The decreased intensity was positively correlated to sample surface and, to a lesser extent, to the species-specific pre-exposureFv/Fmvalue. Dark-exposed samples were less affected than light-exposed ones. All four chlorolichens could recover the pre-exposure ChlaF emission after two days in the absence of H2S, both in the light and in the dark, whereas the cyanolichen did not recover when kept in the dark. The results are thoroughly discussed on the basis of the known action mechanisms of H2S on the photosynthetic apparatus of vascular plants and cyanobacteria.
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Steffens, M., M. A. Granskog, H. Kaartokallio, H. Kuosa, K. Luodekari, S. Papadimitriou, and D. N. Thomas. "Spatial variation of biogeochemical properties of landfast sea ice in the Gulf of Bothnia, Baltic Sea." Annals of Glaciology 44 (2006): 80–87. http://dx.doi.org/10.3189/172756406781811169.

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AbstractHorizontal variation of landfast sea-ice properties was studied in the Gulf of Bothnia, Baltic Sea, during March 2004. In order to estimate their variability among and within different spatial levels, 72 ice cores were sampled on five spatial scales (with spacings of 10 cm, 2.5 m, 25 m, 250m and 2.5 km) using a hierarchical sampling design. Entire cores were melted, and bulk-ice salinity, concentrations of chlorophylla(Chla), phaeophytin (Phaeo), dissolved nitrate plus nitrite (DIN) as well as dissolved organic carbon (DOC) and nitrogen (DON) were determined. All sampling sites were covered by a 5.5–23 cm thick layer of snow. Ice thicknesses of cores varied from 26 to 58 cm, with bulk-ice salinities ranging between 0.2 and 0.7 as is typical for Baltic Sea ice. Observed values for Chla(range: 0.8–6.0 mg ChlaL–1; median: 2.9 mg ChlaL–1) and DOC (range: 37–397 μM; median: 95 μM) were comparable to values reported by previous sea-ice studies from the Baltic Sea. Analysis of variance among different spatial levels revealed significant differences on the 2.5km scale for ice thickness, DOC and Phaeo (with the latter two being positively correlated with ice thickness). For salinity and Chla, the 250 m scale was found to be the largest scale where significant differences could be detected, while snow depth only varied significantly on the 25 m scale. Variability on the 2.5 m scale contributed significantly to the total variation for ice thickness, salinity, Chlaand DIN. In the case of DON, none of the investigated levels exhibited variation that was significantly different from the considerable amount of variation found between replicate cores. Results from a principal component analysis suggest that ice thickness is one of the main elements structuring the investigated ice habitat on a large scale, while snow depth, nutrients and salinity seem to be of secondary importance.
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Pitterle, D. M., and K. V. Rajagopalan. "Two proteins encoded at the chlA locus constitute the converting factor of Escherichia coli chlA1." Journal of Bacteriology 171, no. 6 (1989): 3373–78. http://dx.doi.org/10.1128/jb.171.6.3373-3378.1989.

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YEMETS, Olena A., Knut Asbjørn SOLHAUG, and Yngvar GAUSLAA. "Spatial dispersal of airborne pollutants and their effects on growth and viability of lichen transplants along a rural highway in Norway." Lichenologist 46, no. 6 (October 23, 2014): 809–23. http://dx.doi.org/10.1017/s0024282914000449.

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AbstractThis study aims to quantify dispersal of airborne traffic-related elemental pollutants and concurring responses – relative growth rate (RGR), maximal quantum yield of PSII (Fv/Fm), and chlorophylls (Chlab) – in four epiphytic lichens (Lobaria pulmonaria,Parmelia sulcata,Ramalina farinacea,Usnea dasopoga). Lichens were transplanted from 25 September to 26 March to 1·5 m tall stands in open farmlands at 10, 15, 30, 50 and 100 m from the E6 highway (SE Norway), along three transects on each side usnea dasopoga of the road. The concentrations of most elements (Ca, Mg,Na,Fe,Al, Zn,Ba,Cu,V,Cr,Ni,Co,Sn, As, Mo) significantly increased with increasing proximity to the road. Elements inboldhad elevated concentrations relative to controls, at least in some species at 100 m. The heavy metal accumulation increased from foliose to fruticose lichens in the order:P. sulcata>L. pulmonaria>R. farinacea≫U. dasopoga.However,L. pulmonariawas the only species with strong pollutant-dependent reductions in growth,Fv/Fm, Chlab, and Chla/b-ratio. The RGR and viability parameters were adversely affected by the roadside environment near the road only (≤15 m), and only after substantial heavy metal accumulation. Measurement of metal accumulation in lichens is thus a far more sensitive way of monitoring road pollutants than recording growth and lichen viability. Despite strong species-specific contrasts in elemental concentrations, most road pollutant elements responded similarly to distance from the road in all species.
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Hirata, T., N. J. Hardman-Mountford, R. J. W. Brewin, J. Aiken, R. Barlow, K. Suzuki, T. Isada, et al. "Synoptic relationships quantified between surface Chlorophyll-<i>a</i> and diagnostic pigments specific to phytoplankton functional types." Biogeosciences Discussions 7, no. 5 (September 1, 2010): 6675–704. http://dx.doi.org/10.5194/bgd-7-6675-2010.

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Abstract. Error-quantified, synoptic-scale relationships between chlorophyll-a (Chla) and phytoplankton pigment groups at the sea surface are presented. A total of nine pigment groups were considered to represent nine phytoplankton functional types (PFTs) including microplankton, nanoplankton, picoplankton, diatoms, dinoflagellates, green algae, picoeukaryotes, prokaryotes and Prochlorococcus sp. The observed relationships between Chla and pigment groups were well-defined at the global scale to show that Chla can be used as an index of not only phytoplankton abundance but also community structure; large (micro) phytoplankton monotonically increase as Chla increases, whereas the small (pico) phytoplankton community generally decreases. Within these relationships, we also found non-monotonic variations with Chla for certain pico-plankton (pico-eukaryotes, Prokaryotes and Prochlorococcus sp.) and for Green Algae and nano-sized phytoplankton. The relationships were quantified with a least-square fitting approach in order to estimate the PFTs from Chla alone. The estimated uncertainty of the relationships quantified depends on both phytoplankton types and Chla concentration. Maximum uncertainty over all groups (34.7% Chla) was found from diatom at approximately Chla = 1.07 mg m−3. However, the mean uncertainty of the relationships over all groups was 5.8 [% Chla] over the entire Chla range observed (0.02 < Chla < 6.84 mg m−3). The relationships were applied to SeaWiFS satellite Chla data from 1998 to 2009 to show the global climatological fields of the surface distribution of PFTs. Results show that microplankton are present in the mid and high latitudes, constituting ~9.0 [% Chla] of the phytoplankton community at the global surface, in which diatoms explain ~6.0 [% Chla]. Nanoplankton are ubiquious throught much of the global surface oceans except subtropical gyres, acting as a background population, constituting ~44.2 [% Chla]. Picoplankton are mostly limited in subtropical gyres, constituting ~46.8 [% Chla] globally, in which prokaryotes are the major species explaining 32.3 [% Chla] (prochlorococcus sp. explaining 21.5 [% Chla]), while pico-eukaryotes are notably abundant in the Southern Pacific explaining ~14.5 [% Chla]. These results may be used to constrain or validate global marine ecosystem models.
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ABSC, CHLA. "CHLA/ABSC Announcements." Journal of the Canadian Health Libraries Association / Journal de l'Association des bibliothèques de la santé du Canada 39, no. 3 (November 23, 2018): 126–27. http://dx.doi.org/10.29173/jchla29400.

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Iwasaki, Suginori. "Daily Variation of Chlorophyll-A Concentration Increased by Typhoon Activity." Remote Sensing 12, no. 8 (April 16, 2020): 1259. http://dx.doi.org/10.3390/rs12081259.

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The chlorophyll-a (Chla) concentration product of the Himawari-8 geostationary meteorological satellite is used to show the temporal variation of Chla owing to the passage of typhoons, namely, tropical cyclones in the western North Pacific Ocean. The daily Chla variation shows that Chla usually increases along the paths of typhoons, whereas the same observations are almost impossible when using the data of polar-orbiting satellites as shown in previous studies. This is because the temporal resolution of Himawari-8 is ten times more than that of polar-orbiting satellites, and the daily Chla distribution contains a few disturbances attributed to clouds after compositing cloud-free data. Chla usually increases on the day of typhoon arrival, but mostly, the ratio of Chla increased by a typhoon to the background Chla, R Chla HIMA , is less than 2. Only a few typhoons considerably increased Chla. As a whole, R Chla HIMA is proportional to the maximum 10-min sustained wind speed up to 85 knots (44 m s−1), namely, 0.01 mg m−3 knot−1 (0.019 mg s m−4). However, there is no clear dependence between Chla and the wind speed in seas with higher Chla, such as the South China Sea. The result that typhoons are usually cultivating the ocean is important for studies of primary ocean productivity and carbon flux between the atmosphere and ocean.
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Ahmad, Ahyar. "MOLECULAR CLONING, EXPRESSION AND FUNCTIONAL INTERACTION OF p48 SUBUNIT OF CHICKEN CHROMATIN ASSEMBLY FACTOR 1 WITH HISTONE DEACETYLASE 2 AND HISTONE ACETYLTRANSFERASE 1." Indonesian Journal of Chemistry 12, no. 1 (March 9, 2012): 77–83. http://dx.doi.org/10.22146/ijc.21375.

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We cloned and sequenced cDNA encoding p48 subunit of the chicken CAF-1, chCAF-1p48, and histone acetyltransferase-1, chHAT-1 from chicken DT40 cell lines. We showed that the p48 subunit of CAF-1 tightly binds to two regions of chicken histone deacetylase 2, chHDAC-2, located between amino acid residues 82-180 and 245-314, respectively. We also established that two N-terminal, two C-terminal, or one N-terminal and one C-terminal WD repeat motif of chCAF-1p48 are required for this interaction. The GST pulldown assay, involving truncated and missense mutants of chCAF-1p48, revealed not only that a region containing the seventh WD dipeptide motif of chCAF-1p48, comprising amino acids 376-405, binds to chHAT-1 in vitro, but also that mutation of the motif has no influence on the in vitro interaction. We also established that the region, which is located between amino acids 380-408 of chHAT-1 and contains a leucine zipper motif, is required for its in vitro interaction with chCAF-1p48. Mutation on each of four Leu residues in the leucine zipper motif of chHAT-1 causes the disappearance of the interaction with chCAF-1p48. These results should be useful information for understanding the participation of chCAF-1p48 protein as histones chaperone in DNA-utilizing processes, such as replication, recombination, repair and gene expression in DT40 chicken B cell.
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Eitel, Jan U. H., Lee A. Vierling, Dan S. Long, Marcy Litvak, and Karla C. B. Eitel. "Simple assessment of needleleaf and broadleaf chlorophyll content using a flatbed color scanner." Canadian Journal of Forest Research 41, no. 7 (July 2011): 1445–51. http://dx.doi.org/10.1139/x11-058.

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Total chlorophyll a and b content (Chlab) of leaves is an important indicator of the photosynthetic capacity, nutritional condition, and health status of plants. Developing low-cost, easily accessible methods for estimating foliar Chlab of needleleaf species would enable a broad range of forestry applications. We evaluated data acquired using an off-the-shelf flatbed color scanner to assess its utility in quantifying needleleaf Chlab. Red and green digital numbers (DN) of the scan image were obtained from needle leaves of oneseed juniper ( Juniperus monosperma (Engelm.) Sarg.) and piñon pine ( Pinus edulis Engelm.) in addition to two broadleaf species for comparison purposes. Values of laboratory-determined Chlab (range 1.5–64.0 µg·cm–2) were then predicted using the DN values from the scanner-imaged needle leaves as a regression estimator. The red or green DN values of the scanner-imaged needle leaves were curvilinearly related to Chlab with an r2 of 0.67 (RMSE = 4.72 µg·cm–2, p < 0.001) for juniper needles and an r2 of 0.54 (RMSE = 5.51 µg·cm–2, p < 0.001) for pine needles. Although our results suggest that flatbed scanner derived Chlab estimates are not suitable for applications where highly accurate Chlab estimates are required, the technique is likely to be a useful tool for forest practitioners in managing tree nutrition and health.
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Dissertations / Theses on the topic "ChlaF"

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Candotto, Carniel Fabio. "Meccanismi di risposta di simbionti lichenici allo stress foto-ossidativo." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/10139.

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2012/2013
I licheni, una simbiosi mutualistica tra un fungo (il micobionte), generalmente un ascomicete, e una o più popolazioni di alghe e/o cianobatteri (il fotobionte) sono considerati forme di vita estremofile in quanto da disidratati possono resistere a condizioni ambientali molto difficili come elevati irraggiamenti solari, scarsa disponibilità d'acqua e di nutrienti e dosi elevate di inquinanti aerodiffusi. Tali fattori di stress tuttavia inducono una sovrapproduzione a livello cellulare di specie reattive dell'ossigeno (ROS), che se eccede le difese antiossidanti genera stress ossidativo. L'accumulo delle ROS è un fenomeno molto pericoloso perché porta al danneggiamento di importanti macromolecole come lipidi, proteine e DNA ed in casi estremi può condurre anche alla morte cellulare. Sebbene gli effetti dello stress foto-ossidativo nei licheni siano già stati studiati, in questo dottorato di ricerca si è voluto approfondire alcuni aspetti ancora poco chiari relativi alla resistenza dei fotobionti a questo stress e alla resistenza dei licheni allo stress ossidativo indotto dalla presenza di elevate concentrazioni di inquinanti fotochimici come l'ozono (O3). Sul primo filone di ricerca sono stati condotti due studi. Nel primo ci si è focalizzati sugli effetti dello stress foto-ossidativo su parametri fisiologici di vitalità (ChlaF) e di produzione di ROS in un fotobionte lichenico e nella sua controparte lichenizzata. Ciò è stato ottenuto sottoponendo colture axeniche del fotobionte Trebouxia sp. e lobi del lichene Parmotrema perlatum da cui è stato isolato il fotobionte, a diverse combinazioni di umidità relativa e intensità luminose per periodi di tempo crescenti. L'obiettivo di questo studio è stato quello di approfondire le conoscenze sui benefici indotti dalla lichenizzazione nella resistenza al disseccamento e al concomitante stress foto-ossidativo. Il secondo studio invece, strettamente connesso al primo, è focalizzato sulla variazione di espressione genica dell'intero trascrittoma del fotobionte Trebouxia gelatinosa, isolato dal lichene Flavoparmelia caperata (L.) Hale, indotta da eventi di disidratazione e reidratazione. Con questo studio si è voluto individuare ed analizzare i meccanismi molecolari alla base della tolleranza di questo organismo al disseccamento e al concomitante stress fotoossidativo. Sul secondo filone di ricerca invece è stato condotto uno studio sulle risposte fisiologiche, citologiche e biochimiche del lichene Flavoparmelia caperata (L.) Hale sottoposto a fumigazioni con O3 e mantenuto a diversi regimi di idratazione e di umidità relativa ambientale. L'obiettivo di questo studio è stato quello di verificare se la tolleranza di questo lichene allo stress ossidativo derivante dall'esposizione all'O3 dipende da una strategia O3-avoidant, imputabile alla sua inattività metabolica durante le ore della giornata in cui si verifica il picco dell'O3, oppure da una O3-tolerant, dovuta invece alla presenza di un cospicuo ed efficace corredo di difese antiossidanti. Il primo studio ha dimostrato che il fotobionte algale al di fuori della simbiosi è in grado di resistere a livelli elevati di stress foto-ossidativo anche per periodi molto lunghi. Tuttavia è stato confermato che la simbiosi adduce benefici importanti come l'aumento della capacità di estinzione dell'energia accumulata dalle clorofille attraverso meccanismi non fotochimici e un ridotto effetto ossidativo indotto dal disseccamento. Questi risultati ci hanno permesso di sfatare l'ormai consolidata idea che i fotobionti algali, in particolare quelli del genere Trebouxia, siano particolarmente delicati e incapaci di tollerare autonomamente (al di fuori della simbiosi) fattori di stress abiotici come quelli che intervengono durante il disseccamento. Dai risultati del secondo studio è emerso che il fotobionte T. gelatinosa per far fronte alle importanti alterazioni dovute alla perdita d'acqua, si affida soprattutto a meccanismi che intervengono durante la fase di reidratazione. I più importanti coinvolgono molecole di riparazione “chaperone”, e. g. “Heath Shock Proteins”, e proteine della famiglia “Desiccation Related Proteins”, la cui funzione è ancora sconosciuta, ma visto l'elevato numero, la loro diversità intraspecifica e la sensibilità ai cambi di contenuto idrico, sembrano giocare un ruolo molto importante. Paradossalmente invece non sono state osservate alterazioni nell'espressione di geni collegati alle difese antiossidanti, che è sempre rimasta a livelli costitutivi. Ciò è stato interpretato come una strategia che permette all'organismo di avere sempre a disposizione mRNA per la neo-sintesi di nuovi enzimi coinvolti nelle difese antiossidanti. Infine nell'ultimo studio è stata riconfermata l'elevata resistenza del lichene F. caperata allo stress ossidativo derivato dall'esposizione all'O3 in quanto alla concentrazione utilizzata, ovvero il massimo registrato nell'ambiente alle nostre latitudini, non è stato osservato alcun effetto sulla vitalità nonostante sia stata osservata una notevole produzione di ROS. L'effetto ossidativo dell'O3 infatti è stato controbilanciato dalle difese antiossidanti le quali si sono mostrate altamente sensibili all'esposizione ed efficaci anche a bassi contenuti idrici. Lo stress ossidativo derivante da fattori abiotici di origine naturali e antropica dunque sembra essere gestito efficacemente sia dai licheni che dai loro fotobionti isolati, grazie ad efficienti difese antiossidanti e all'intervento di meccanismi di riparazione del danno.
XXVI Ciclo
1983
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Krames, Marion [Verfasser], and Yong [Akademischer Betreuer] Liang. "Leseverstehen und lexikalische Kompetenz in Chinesisch als Fremdsprache (ChaF): Auswertung psycholinguistischer Untersuchungen im Hinblick auf die Lese- und Wortschatzdidaktik in ChaF / Marion Krames ; Betreuer: Yong Liang." Trier : Universität Trier, 2015. http://d-nb.info/1197701710/34.

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Tahraoui, Douma Naïma. "Valorisation par compostage des résidus solides urbains de la commune de Chlef, Algérie." Limoges, 2013. https://aurore.unilim.fr/theses/nxfile/default/36eb37e8-b213-45b9-aa04-305f2226ce99/blobholder:0/2013LIMO4038.pdf.

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L'Algérie doit faire face à une augmentation continue des résidus solides urbains (RSU). Cette augmentation est due non seulement à la croissance démographique et au développement économique, mais aussi au changement des modes de production et de consommation de la population algérienne. La gestion des RSU par les autorités locales (communes, daïras et willayas) connaît des insuffisances pour le tri et la valorisation de certains constituants de la poubelle domestique. Cette gestion nécessite un traitement global du problème de l'organisation de la collecte et du transport, la valorisation et à l'élimination en centres de stockage de déchets ultimes (CSDU) présentant toutes les garanties pour la protection de l'environnement (eaux, sols et air). Ces difficultés de gestion sont principalement dues à des problèmes organisationnels : - une collecte insuffisante pose des problèmes d'élimination, - la présence de dépotoirs au sein des zones urbaines, dégrade la qualité de la vie des populations et - les décharges publiques non contrôlées présentent un risque de pollution des eaux souterraines et superficielles. Dans ce contexte, un traitement par compostage des résidus urbains solides de la commune de Chlef, a été formulé et présenté aux autorités compétentes de la willaya de Chlef, en lançant une étude sur les possibilités de compostage des RSU à majorité organiques (60-70%). Cette valorisation des résidus sous forme de compost permettrait d'alléger la charge polluante arrivant à la décharge de Meknassa. Ce travail de recherche-action est orienté sur plusieurs aspects pour assurer une filière pérenne de compostage, et sur notamment : - la caractérisation précise du gisement de RSU en flux (T/J) et en composition sur deux années et quatre saisons, - l'expérimentation sur un pilote demi-grand d'une plateforme de tri-compostage, permettant de fixer tous les paramètres de fonctionnement du procédé, et – l'étude de la valorisation agronomique du compost produit sur plusieurs types de cultures en pratique dans la willaya de Chlef
Algeria has to face a continuous increase of the urban solid residues (MSW) produced in the country. This increase is not only due to the population growth and to the economic development, but also to the change of the modes of production and consumption of the Algerian population. The management of the MSW by the local authorities (municipalities, daïras and willayas) knows inadequacies for the sorting and the valuation of certain constituents of the domestic bin. This management requires a global treatment of the problem which concerns the organization of the collection, the transport, the recycling and composting and the elimination in centers of storage of ultimate waste ( CSUW) presenting all the guarantees for the environmental protection (waters, grounds and air). These difficulties of management are mainly due to organizational problems: - an insufficient collection raises problem of public health and entails important sanitary risks, - the presence of garbage dumps within the urban zones, degrades the quality of life of the populations and - uncontrolled dump sites present a risk of water pollution subterranean and superficial. In this context, a treatment by composting of the municipal solid waste of the municipality of Chlef, was formulated and presented to the competent authorities of the willaya of Chlef, with a study on the possibilities of composting of the MSW predominantly organic (60-70 %). This valorization of residues in the form of compost would allow relieving the polluting load arriving in the landfill of Meknassa. This work of search-action is directed on several aspects to insure a long-lasting sector of composting, and on in particular: - the characterization specifies of the field of MSW into flow (Ton / day) and into composition over two years and four seasons, - the experiment on a half-big pilot of a platform of sorting-composting, allowing to fix all the parameters of functioning of the process, and the study of the agronomic valuation of the produced compost on several types of cultures used in the willaya of Chlef
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TEGUIA, FOUDIL. "Catastrophes naturelles et sociétés : la reconstruction de la ville de Chlef après le séïsme du 10 octobre 1980." Pau, 1992. http://www.theses.fr/1992PAUU1004.

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Le travail entrepris dans cette these se rapporte principalement a la restructuration spatiale d'une ville 'chlef, algerie) detruite a 80% par un seisme (le 10 10 1980) et a ses reombees sociales, notamment en ce qui concerne les rapports qu'entretenait la population avec son espace vecu. La reconstruction de la ville sous forme de cites prefabriquees multipolaires, loin de l'ancien tissu urbain, donna un cachet volontariste au processus de reconstruction de la ville qui n'a pas ete, d'ailleurs, sans consequences directes sur la representation socio-spatiale de la ville. Evidemment, une nouvelle pratique urbaine s'est developpee autour de deux poles, d'un cote, les nouvelles cites prefabriquees comme lieu de residence, et d'un autre cote, l'ancien tissu urbain comme lieu d'activite mais aussi lieu de rencontres sociales et espace symbolique. Dans un tel systeme, la reappropriation des espaces, notamment celle du quartier central, ne s'est pas faite sans antagonisme entre les differents acteurs de la ville impliques directement ou indirectement dans le maintien du site initial de leur cite. Des pratiques quotidiennes et des representaions ideelles objectiven des espaces reel bien definis qui symbolisent l'identite spatiale des habitant et attachement a leur ancienne ville, endommagee
The work that was undertaken in this thesis is mainly dealing with the spatial reconstruction of a town (clef, alegeria), 80% of which were destructed by an earthquake as regards the relations the poplation had with the space it used it used tolive the building of the town took the form of multipolar prefabricated blocks, far from the former urban network. This gave the stamp of willpoqer to the process of the rebuilding of the town that was not, moreover, without direct consequences upon the socio-spatial representation of the town. A new urban practice obviously developed and fowsed upon two areas : on the hand the new prefabicated blocks as a place of residence, on the other hand the former urban net work as a place of activity but also as a place for social maating and symbolical space. In such a system, some antagonism arose about the reappropriation of the spaces, particularly that of the central area, between the various actors of the town (the various people who look part in the rebuilding of the town) directly or indirectly involved in the preservation of the town's orginal site. Daily pratices and mental representations objectivise welldefined real spaces which symbolise the inhabitants' spatial identity and their attachment to their former town ever if it was damaged
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Boussaad, Salah. "Effet de la température sur les propriétés électriques et photo-électriques des cellules A1 | Chla | Ag." Thèse, Université du Québec à Trois-Rivières, 1991. http://depot-e.uqtr.ca/5394/1/000589225.pdf.

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Slimani, Aït Saada El Djamhouria. "Géographie, imaginaire, fiction, la plaine du Chélif à travers les textes : tome1Anthologie régionale, la plaine du Chélif à travers les textes : Chlef, Miliana, Ténès tome 2." Cergy-Pontoise, 2007. http://biblioweb.u-cergy.fr/theses/07CERG0321.pdf.

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Cette thèse au carrefour de l’Histoire, de la géographie et de la littérature, se propose de cerner l’émergence de lieux en écriture. Elle vise à la représentation d’une partie de la plaine du Chélif, à travers des textes divers ressortissant essentiellement à l’Histoire, au témoignage, au récit de voyage et à la Fiction. Ces textes sont réunis sous forme d’anthologie qui peut être susceptible d’être exploitée sur le plan didactique, même si sa visée reste avant tout littéraire. Le fil directeur de ce recueil est le lieu géographique, son histoire et ses différentes représentations sur le plan de l’écriture et de l’imaginaire. Cette thèse a pour ambition de permettre de contribuer à la connaissance de l’expression textuelle d’une région et son orientation didactique s’inscrit dans de nouveaux outils à proposer dans le cadre de l’enseignement de la littérature en Algérie ou comme outil didactique dans l’approche des textes en classe de français langue étrangère
This thesis, which is at the intersection of history, geography and literature, proposes to grasp the emergence of places in writing. It aims at the representation of an area through diverse texts, which emerge essentially from History, testimony, tales of travellers as well as from fiction. These texts are gathered in the form of an anthology that can likely be exploited at the level of teaching, even if its goal is primarily literary. The main or guiding idea of this collection is the geographic place, its history and its different representations at the level of writing and of the imaginary. This thesis aims to the contribution of knowing about the textual expression of a given area, and its didactic orientation suggests new ways to teach literature in Algeria, or as a didactic tool in studying texts in classrooms of French as a foreign language
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Slimani, Aït Saada El Djamhouria Achour Christiane. "Géographie, imaginaire, fiction, la plaine du Chélif à travers les textes : tome1 ; Anthologie régionale, la plaine du Chélif à travers les textes : Chlef, Miliana, Ténès tome 2." [S.l.] : [s.n.], 2008. http://biblioweb.u-cergy.fr/theses/07CERG0321.pdf.

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Barboza, Tenório Márcio Murilo. "Les cyanobactéries pélagiques en milieu tropical oligotrophe : occurence, distribution et dynamique." Paris 6, 2006. http://www.theses.fr/2006PA066100.

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Kroupa, Petr. "Vzduchotechnika bytového domu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392206.

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The purpose of my diploma thesis is to propose the air condition to apartments. The work is divided into two parts. The first part describes the climate of the internal spaces, its forms, what it is influenced by and what way it influences the human. It analyzes natural and indoor ventilations. The second part desings air condition to concrete flat, technical report including the mechanical drawings and technical paper of used products.
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Studený, Jan. "Power - plant." Master's thesis, Vysoké učení technické v Brně. Fakulta architektury, 2015. http://www.nusl.cz/ntk/nusl-216180.

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The "POWER - PLANT" deals with the rehabilitation of the former Central Power Conversion and Dale Schoeller (Nejedly I and III) in the village Libušín Mine. Will be newly designed for building the power plant technology with progressive fluidized bed boiler to biomass steam turbine with an output of 7 MW and absorption (trigeneration) unit producing heat, cooling and electricity, which also will function as a cooler primary circuits. The source of water for the power plant will not only former mining pit Nejedlý I which is currently flooded drinking water at about 12 ° C. This system uses high efficiency embedded fuel (biomass), which is ultimately required less. A greater proportion of electricity generated and part of the heat will be distributed to the public network. In most areas will be proposed publicly accessible greenhouses of steel-aluminum construction filled ETFE foil forming the heat insulating membrane filled with air. The reason is to create conditions for the cultivation of tropical and subtropical plants. Greenhouses will be connected to the absorption unit power (underground meanders through which water will circulate), the ventilation shaft mine and mine water - therefore it will be possible to manage the conditions of the internal environment of the building without the influence of the season and especially without mounting other technological devices. It will provide for cooperation with the absorption unit for cooling the primary circuit - therefore eliminating the need for cooling towers or fans. The project will build a detached departments of the Faculty of Mechanical Engineering in Prague - Institute of progressive technologies and systems for energy and the Faculty of Agronomy and Natural Resources CULS. The reason is to allow students and scientists actively and in practice mainly participate in the operation and especially the development of the issue. The public in the area besides themselves open to the greenhouses indoor and outdoor thermal swimming. Part of the entrance hall is a bistro and foremost lecture hall. The aim is decentralized botanical-energy complex of buildings that produce electricity, heat, cooling, and biomass, and creating recreational, educational and research conditions.
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Books on the topic "ChlaF"

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Háber, Stanislav. Sme samý lepší chlap. Bratislava: Vyd-vo Spolku slovenských spisovatel̕ov, 1995.

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Radoslav Brzobohatý: Chlap se širokým srdcem. 2nd ed. Řitka: Čas, 2012.

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Jūlān, Qāṃṅ. Ṭaṃṇoer jīvit manuss Khmaer: Moel tām bidhī chlaṅ văy. Bhnaṃ Beñ: Hanumān Descarn̊, 2007.

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Boukechour, Mohammed Salah. Les amis de la révolution algérienne (1954-1962): Processus d'une mutation de la conviction à l'action : actes du Colloque international organisé par la Faculté des sciences humaines et sociales, Université Hassiba Ben Bouali de Chlef et le Centre national d'études et de recherche sur le mouvement national et la révolution du 1er novembre 1954 : 17-18 novembre 2010. Alger: Houmas éditions, 2017.

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Chaf! Editorial Corimbo, 2001.

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Chaf! Corimbo, 2003.

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CHLA/ABSC Code of ethics. Toronto: CHLA/ABSC Secretariat, 1998.

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Hemza, Saidi, SAMET Saliha, and TAIEBI Hafida. Etude bactériologique de quelques sources de la Willaya de Chlef: Analyses bactériologiques. Éditions universitaires européennes, 2021.

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Rutherford, M. Louise. A case study of the Canadian Health Libraries Association/Association des bibliothèques de la santé du Canada benchmarking tool kit. 1998.

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Book chapters on the topic "ChlaF"

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Nicolaj, Giovanna. "A conclusione delle ChLA, seconda serie." In Archiv für Diplomatik, Schriftgeschichte, Siegel- und Wappenkunde, 10–20. Köln: Böhlau Verlag, 2021. http://dx.doi.org/10.7788/9783412520571.10.

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Bouaricha, Leyla, Ahmed Djafar Henni, and Laurent Lancelot. "Glass Fiber Effect on the Undrained Static Response of Chlef Sand (Northern Algeria)." In Recent Advances in Geo-Environmental Engineering, Geomechanics and Geotechnics, and Geohazards, 273–76. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01665-4_63.

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Boutaraa, Zohra, Ahmed Arab, Mohammed Chemmam, and Abed Elkadder Brahimi. "Use of Soil Densification Process to Resolve Soil Instabilities in Chlef City (Algeria)." In Research Developments in Geotechnics, Geo-Informatics and Remote Sensing, 63–65. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-72896-0_14.

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Cammarata, Kirk, F. Gerald Plumley, and Gregory W. Schmidt. "Reconstitution of Light Harvesting Complexes: A Single Apoprotein Binds CHLa, CHLb, and Xanthophylls." In Current Research in Photosynthesis, 1301–4. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0511-5_302.

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ZaÏri, Youssouf. "Flood Risk Mapping in the Region of Ouled Ben Abdelkader in the Wilaya of Chlef, Northern Algeria." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions, 879–81. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70548-4_258.

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Laama, Chahinez, and Nour El Islem Bachari. "Spatiotemporal Variation of Physicochemical and Bacteriological Parametres for Site Selection of Finfish Cage in Souahlia Bay, Chlef (Algeria)." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions, 1657–58. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70548-4_481.

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Hu, Mao-Lin, Hui-Ming Zhou, and Fei Li. "Correlation between Chla concentration and environmental factors in Poyang Lake, China." In Hydraulic Engineering, 219–24. CRC Press, 2013. http://dx.doi.org/10.1201/b14013-38.

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M. Berner, Jacques, Mathilda Magdalena van der Westhuizen, and Derrick Martin Oosterhuis. "Chlorophyll a Fluorescence as an Indicator of Temperature Stress in Four Diverse Cotton Cultivars (Gossypium hirsutum L.)." In Chlorophylls. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104598.

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Heat stress has a detrimental effect on cotton (Gossypium hirsutum L.) production worldwide. The reproductive stage is especially vulnerable to heat stress, which will result in significant yield losses. Chlorophyll a fluorescence (ChlF) induction kinetics was used to investigate the heat tolerance of four cotton cultivars. Cultivars Arkot 9704, VH260, DP393, and DP 210 B2RF were subjected to 30°C and 40°C heat treatments. Plants were grown for 46 days up to the pinhead square stage whereafter plants were subjected to the two temperature regimes for a period of 6 hours. Decreases in the maximum quantum yield of PSII (Fv/Fm) and the performance indexes (PIABS and PITOTAL) reflected the negative impact of elevated temperature on photosynthesis in all four cultivars. In cultivar DP393 the lowest drop in values for Fv/Fm, PIABS, and PITOTAL, showed the genetic capacity of this cultivar to cope with heat stress. Cultivars VH260, DP210 and to a lesser extent Arkot 9704 were adversely affected by heat stress. Chlorophyll a fluorescence measurements and the interpretation of the functions within the chlorophyll transient proved to be a fast and accurate method of identifying heat-tolerant cotton cultivars.
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"Appendix 3. An Immunity of Charlemagne (December 6, 777): ChLA 19:28-33, no. 679*." In Negotiating Space, 225–26. Ithaca, NY: Cornell University Press, 2018. http://dx.doi.org/10.7591/9781501718687-018.

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"Appendix 1. An Immunity of King Theuderic III (October 30, 688): ChLA 13 :go-91, no. 570*." In Negotiating Space, 219–20. Ithaca, NY: Cornell University Press, 2018. http://dx.doi.org/10.7591/9781501718687-016.

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Conference papers on the topic "ChlaF"

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Mimura, Shu, Keichi Itoh, Takumi Kobayashi, Tomohiro Takigawa, Atsushi Tajima, Atsushi Sawamura, and Nobuyuki Otsu. "The Cow Gait Recognition Using CHLAC." In 2008 ECSIS Symposium on Bio-Inspired Learning and Intelligent Systems for Security (BLISS). IEEE, 2008. http://dx.doi.org/10.1109/bliss.2008.31.

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Otsu, Nobuyuki. "CHLAC Approach to Flexible and Intelligent Vision Systems." In 2008 ECSIS Symposium on Bio-Inspired Learning and Intelligent Systems for Security (BLISS). IEEE, 2008. http://dx.doi.org/10.1109/bliss.2008.25.

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Sakabe, Fumio, Masahiro Murakawa, Takumi Kobayashi, Tetsuya Higuchi, and Nobuyuki Otsu. "Anomalousness Detection for Surgery Videos Using CHLAC Feature." In 2009 Symposium on Bio-inspired Learning and Intelligent Systems for Security (BLISS). IEEE, 2009. http://dx.doi.org/10.1109/bliss.2009.13.

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Kobayashi, Takumi, Tetsuya Higuchi, Tsuneharu Miyajima, and Nobuyuki Otsu. "Recognition of Dynamic Texture Patterns Using CHLAC Features." In 2009 Symposium on Bio-inspired Learning and Intelligent Systems for Security (BLISS). IEEE, 2009. http://dx.doi.org/10.1109/bliss.2009.31.

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Oishi, Takahito, Baigalmaa Tsagaan, and Hiromasa Nakatani. "Analysis of Shrimp's Mating Motion Using CHLAC Feature." In 2012 IIAI International Conference on Advanced Applied Informatics (IIAIAAI). IEEE, 2012. http://dx.doi.org/10.1109/iiai-aai.2012.80.

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Kaneko, Takumi, and Meifen Cao. "Human fall detection using CHLAC features with skeletal image sequences." In 2016 IEEE International Symposium on Robotics and Intelligent Sensors (IRIS). IEEE, 2016. http://dx.doi.org/10.1109/iris.2016.8066084.

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Iwata, Kenji, Yutaka Satoh, Katsuhiko Sakaue, Takumi Kobayashi, and Nobuyuki Otsu. "Development of Software for Real-Time Unusual Motions Detection by Using CHLAC." In 2008 ECSIS Symposium on Bio-Inspired Learning and Intelligent Systems for Security (BLISS). IEEE, 2008. http://dx.doi.org/10.1109/bliss.2008.18.

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"Start and End Point Detection of Weightlifting Motion using CHLAC and MRA." In International Workshop on Bio-inspired Human-Machine Interfaces and Healthcare Applications. SciTePress - Science and and Technology Publications, 2010. http://dx.doi.org/10.5220/0002813100440050.

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Nouar, Hadda, Toufik Tahri, and Younes Chiba. "Study on the Performance of a solar chimney power plant Chlef, Algeria region." In 2018 International Conference on Applied Smart Systems (ICASS). IEEE, 2018. http://dx.doi.org/10.1109/icass.2018.8652067.

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Diraviam, Augustus F., Ritu Agrawal, Madhur Bansal, and Krishna Janakiraman. "CHAF - an object-oriented framework for configuring applications in a clustered environment." In 2007 IEEE International Conference on Cluster Computing (CLUSTER). IEEE, 2007. http://dx.doi.org/10.1109/clustr.2007.4629258.

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