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Search Results: 1 - 10 of 926 matches for " Schuh Mariangela "
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Simulating the vernalization response of the "Snow Queen" lily (Lilium longiflorum Thunb.)
Streck, Nereu Augusto;Schuh, Mariangela;
Scientia Agricola , 2005, DOI: 10.1590/S0103-90162005000200004
Abstract: vernalization is a process required by certain plant species, including lilies (lilium spp.), to enter the reproductive phase, through an exposure to low, non-freezing temperatures. the objective of this study was to evaluate a nonlinear vernalization response function for the "snow queen" lily. an experiment was carried out in santa maria, rs, brazil, to provide an independent data set to evaluate the performance of the model. lily bulbs were vernalized at -0.5, 4.0, and 10oc during two, four, six, and eight weeks. the daily vernalization rate (fvn) for each treatment was calculated with a beta function, and the effective vernalization days (vd) were calculated by accumulating fvn. the thermal time from plant emergence to visible buds at different vd treatments was used as the observed response to vd. lily plants were not vernalized at values less than eight effective vernalization days and were fully vernalized at values greater than 40 days. the generalized nonlinear vernalization function described well the "snow queen" lily developmental response to vd, with a root mean square error of 0.178.
Simulating the vernalization response of the "Snow Queen" lily (Lilium longiflorum Thunb.)
Streck Nereu Augusto,Schuh Mariangela
Scientia Agricola , 2005,
Abstract: Vernalization is a process required by certain plant species, including lilies (Lilium spp.), to enter the reproductive phase, through an exposure to low, non-freezing temperatures. The objective of this study was to evaluate a nonlinear vernalization response function for the "Snow Queen" lily. An experiment was carried out in Santa Maria, RS, Brazil, to provide an independent data set to evaluate the performance of the model. Lily bulbs were vernalized at -0.5, 4.0, and 10oC during two, four, six, and eight weeks. The daily vernalization rate (fvn) for each treatment was calculated with a beta function, and the effective vernalization days (VD) were calculated by accumulating fvn. The thermal time from plant emergence to visible buds at different VD treatments was used as the observed response to VD. Lily plants were not vernalized at values less than eight effective vernalization days and were fully vernalized at values greater than 40 days. The generalized nonlinear vernalization function described well the "Snow Queen" lily developmental response to VD, with a root mean square error of 0.178.
Vernaliza??o afeta a mobiliza??o de reservas de a?úcares e nitrogênio e a emergência de plantas de lírio (Lilium longiflorum thunb.) ?snow queen?
Nardi, Claudia;Buriol, Galileo Adeli;Bellé, Rogério Ant?nio;Streck, Nereu Augusto;Schuh, Mariangela;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000400009
Abstract: in order to evaluate the response of effective vernalization days on the soluble sugar and total nitrogen contents and the emergence of lilium longiflorum plant shoots, cv ?snow queen? bulbs were kept under different vernalization temperatures and periods of treatment under vernalizing temperatures, and cultivated in a plastic greenhouse after the vernalization. the experiment was carried out at the universidade federal de santa maria, rs, in two seasons: from 03/20/02 to 11/05/02 and from 12/05/02 to 05/15/03. the treatments were 0, 9, 11, 14, 19, 23, 28, 29, 34, 38, 42, 45 and 56 effective vernalization days, calculated with a beta response function to temperature. the soluble sugar and total nitrogen contents, and the duration of the planting-emergence (p-m) phase were determined. the vernalization promoted the mobilization of sugar and nitrogen reserves, which is important for the nutrition of the emergence of the shoot. the increasing number of the effective vernalization days reduced the duration of the p-e phase. bulbs treated under temperatures of 10oc for 6 to 8 weeks of storage (34 and 45dv), had the shortest duration of the p-e phase.
Estimating leaf appearance rate and phyllochron in safflower (Carthamus tinctorius L.)
Streck, Nereu Augusto;Bellé, Rogério Antonio;Rocha, Edileusa Kersting da;Schuh, Mariangela;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000600036
Abstract: safflower may be an interesting option for the flower market, either as fresh or dried cut flower. estimating the leaf appearance rate and the phyllochron (the time interval between the appearance of successive leaves) is important for calculating the number of emerged leaves (nl) on the plant, which is an excellent measure of plant development. the objective of this study was to estimate the leaf appearance rate and the phyllochron in safflower (carthamus tinctorius l.). an experiment was conducted in santa maria, rs, brazil, inside an 8 x 15m plastic greenhouse. sowing was on 03 october 2003 and emergence was on 08 october 2003. the experimental design was a randomized complete block design with three replications. the main stem nl was measured twice a week from 24 october 2003 to 15 november 2003 in four plants per replication. daily growing degree days above a base temperature (5°c) and accumulated thermal time (tt) were calculated. the nl was linearly regressed against tt. the angular coefficient of the linear regression is the lar (leaves/ °c day) and the phyllochron (°c days/leaf) was estimated by the inverse of the angular coefficient of the linear regression. the lar was 0.0467 ± 0.0203 leaves/ °c day and the phyllochron was 25.5 ± 14.6°c days/leaf.
Estimating leaf appearance rate and phyllochron in safflower (Carthamus tinctorius L.)
Streck Nereu Augusto,Bellé Rogério Antonio,Rocha Edileusa Kersting da,Schuh Mariangela
Ciência Rural , 2005,
Abstract: Safflower may be an interesting option for the flower market, either as fresh or dried cut flower. Estimating the leaf appearance rate and the phyllochron (the time interval between the appearance of successive leaves) is important for calculating the number of emerged leaves (NL) on the plant, which is an excellent measure of plant development. The objective of this study was to estimate the leaf appearance rate and the phyllochron in safflower (Carthamus tinctorius L.). An experiment was conducted in Santa Maria, RS, Brazil, inside an 8 x 15m plastic greenhouse. Sowing was on 03 October 2003 and emergence was on 08 October 2003. The experimental design was a randomized complete block design with three replications. The main stem NL was measured twice a week from 24 October 2003 to 15 November 2003 in four plants per replication. Daily growing degree days above a base temperature (5degreesC) and accumulated thermal time (TT) were calculated. The NL was linearly regressed against TT. The angular coefficient of the linear regression is the LAR (leaves/ degreesC day) and the phyllochron (degreesC days/leaf) was estimated by the inverse of the angular coefficient of the linear regression. The LAR was 0.0467 ? 0.0203 leaves/ degreesC day and the phyllochron was 25.5 ? 14.6degreesC days/leaf.
Vernaliza??o afeta o filocrono em lírio
Schuh, Mariangela;Streck, Nereu Augusto;Nardi, Claudia;Buriol, Galileo Adeli;Bellé, Rogério Ant?nio;Brackmann, Auri;
Bragantia , 2005, DOI: 10.1590/S0006-87052005000100003
Abstract: an experiment was carried out to verify the effect of vernalization period on the phyllochron (time interval between the appearance of two successive leaves) in lily (lilium longiflorum thunb), cv. 'snow queen'. the trial was conducted at santa maria, rs, brazil. treatments were bulbs stored at vernalizing temperatures of -0.5, 4, and 10oc during periods of 2, 4, 6 and 8 weeks. control treatment was unvernalized bulbs. bulbs were planted inside a plastic greenhouse on december 05, 2002, and crop development was evaluated throughout the growing season. phyllochron for each treatment was estimated as the inverse of the slope of the linear regression relating leaf number and accumulated thermal time above 1oc after emergence. results showed that the phyllochron is affected by vernalization. unvernalized plants and plants with low vernalization treatments had greater phyllochron values compared to completely vernalized plants. plants vernalized with 30 or higher effective vernalization days had a phyllochron value around 25 oc days/leaf. this phyllochron can be used as a reference when vernalized bulbs are used in commercial croppings.
How research on marketing in Central and Eastern Europe can advance international marketing theory
Arnold Schuh
Tr?i?te/Market , 2010,
Abstract: This paper deals with the question of how research on marketing issues in Central and Eastern Europe (CEE) can contribute to the international marketing theory. Regional studies provide valuable insights into business environments, marketing systems and practices in specific countries and geographical areas, which explain their high appeal among marketing practitioners. While contributing to the general body of knowledge in marketing, they often lack a strong role in theory development. Two approaches which link regional studies to the advancement of international marketing theory are presented and discussed: research on CEE has to be either integrated into existing theories or used as a starting point for the building of new theories. The choice of an inductive or deductive research approach is rather secondary as long as unique marketing phenomena are addressed. Unique marketing phenomena originating from a CEE context bring forth innovative insights and have a large potential to add value to the international marketing theory.
Integrating specimen databases and revisionary systematics
Randall Schuh
ZooKeys , 2012, DOI: 10.3897/zookeys.209.3288
Abstract: Arguments are presented for the merit of integrating specimen databases into the practice of revisionary systematics. Work flows, data connections, data outputs, and data standardization are enumerated as critical aspects of such integration. Background information is provided on the use of “barcodes” as unique specimen identifiers and on methods for efficient data capture. Examples are provided on how to achieve efficient workflows and data standardization, as well as data outputs and data integration.
Les livres pairs d’Alfred Jarry
Julien Schuh
Conserveries Mémorielles : Revue Transdisciplinaire de Jeunes Chercheurs , 2008,
Abstract: Dans les Gestes et opinions du Dr Faustroll, pataphysicien, Alfred Jarry décrit une bibliothèque idéale, composée de 27 ouvrages qu’il nomme mystérieusement des livres pairs . Dans cette liste, on trouve aussi bien des uvres canoniques du symbolisme (Mallarmé, Verlaine, Poe traduit par Baudelaire), des titres des amis de Jarry et des piliers des revues de l’époque (Rachilde, Gustave Kahn, Léon Bloy), que des ouvrages que l’on assimile davantage aux lectures enfantines (un conte de Marceline Desbordes-Valmore, les Mille et une Nuits, le théatre de Florian) ou des textes hors-catégorie (l’ uvre de Rabelais, l’évangile de Luc, les Chants de Maldoror). Beaucoup de critiques se sont interrogés sur la notion de parité , sur l’égalité supposée entre ces ouvrages n’appartenant pas aux mêmes catégories littéraires. Mais l’intérêt de cette liste n’est pas de fournir un classement, ou d’affirmer l’équivalence de toutes les formes textuelles, comme on l’analyse souvent, en faisant de Jarry un chantre du nihilisme qui chercherait à pervertir les hiérarchies littéraires pour montrer la vacuité du sens. Au contraire, en faisant débuter le Faustroll par une liste d’ouvrages, Jarry met en place les conditions de réception de son texte, dans une posture très littéraire. L’espace délimité par la liste des auteurs pairs fonctionne comme un portrait spirituel de Jarry-littérateur, et livre le contexte selon lequel son discours doit être re u. La bibliothèque du Dr Faustroll fixe les références que le lecteur pourra voir convoquer dans le texte, et circonscrit l’espace littéraire dans lequel peut fonctionner cet ouvrage.
Pulsations and planets: the asteroseismology-extrasolar-planet connection
Sonja Schuh
Physics , 2010, DOI: 10.1002/asna.201011366
Abstract: The disciplines of asteroseismology and extrasolar planet science overlap methodically in the branch of high-precision photometric time series observations. Light curves are, amongst others, useful to measure intrinsic stellar variability due to oscillations, as well as to discover and characterize those extrasolar planets that transit in front of their host stars, periodically causing shallow dips in the observed brightness. Both fields ultimately derive fundamental parameters of stellar and planetary objects, allowing to study for example the physics of various classes of pulsating stars, or the variety of planetary systems, in the overall context of stellar and planetary system formation and evolution. Both methods typically also require extensive spectroscopic follow-up to fully explore the dynamic characteristics of the processes under investigation. In particularly interesting cases, a combination of observed pulsations and signatures of a planet allows to characterize a system's components to a very high degree of completeness by combining complementary information. The planning of the relevant space missions has consequently converged with respect to science cases, where at the outset there was primarily a coincidence in instrumentation and techniques. Whether space- or ground-based, a specific type of stellar pulsations can themselves be used in an innovative way to search for extrasolar planets. Results from this additional method at the interface of stellar pulsation studies and exoplanet hunts in a beyond-mainstream area are presented.
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