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Can the critical temperature for photochemical damage in common bean plants be changed after a drought event? Bragantia
Ribeiro,Rafael Vasconcelos; Santos,Mauro Guida dos; Pimentel,Carlos; Machado,Eduardo Caruso; Oliveira,Ricardo Ferraz de.
Low water availability and high temperatures occur under field conditions and we hypothesize that the critical temperature for photochemical damage (TC) in common bean (Phaseolus vulgaris L.) plants is increased by the occurrence of previous water deficit in a genotype-dependent manner. Five common bean cultivars A320, A222, Carioca, BAT477 and Ouro Negro were evaluated. Thirty days after seedlings emergence, one group of plants was exposed to water deficit for ten days and rehydrated and another one was maintained well hydrated during the experimental period. The minimum chlorophyll fluorescence (FO) was monitored in leaf discs exposed to temperatures ranging from 25 to 45 oC and the TC values estimated. The previous water deficit did not affect TC, which...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Chlorophyll fluorescence; Hardening; Heat stress; Phaseolus vulgaris; Tolerance.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000400374
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Endurcissement du naissain d’huîtres creuses, Crassostrea gigas par le niveau d’exondation ou la densité d’élevage : récapitulatif d’essais conduits entre 2004 et 2007 en rivière d’Auray (56), pour réduire les mortalités estivales ArchiMer
Mazurie, Joseph; Bouget, Jean-francois; Langlade, Aime; Claude, Serge.
This report summarizes a list of husbandry experiments conducted between 2004 and 2007 so as to reduce the summer mortalities of the oyster Crassostrea gigas by farming practices. The Japanese technique so‐called “hardening”, based on nursing the young oysters (less than 1 year‐old) in intertidal areas with high air exposure, is tested and adapted. Significant improvements of survival rates (e.g. 60% survival instead of 40% survival rate) have been obtained by transferring the spat only a few month (between march and june‐july) on “high” inter‐tidal farming plots (up to 40% of mean air exposure time). In such conditions, growth is transiently reduced, but a compensatory growth seems to happen when oysters are transferred back on low concessions. Another...
Tipo: Text Palavras-chave: Huître; Crassostrea gigas; Mortalité; Endurcissement; Exondation; Densité; Oyster; Crassostrea gigas; Mortality; Hardening; Air exposure; Density.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00042/15350/12705.pdf
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Interpretation of the stiffness and permeability of Sand-Kaolin mixtures in the framework of homogenization Anais da ABC (AABC)
Boutin,Claude; Kacprzak,Gregory; Doanh,Thiep.
This study deals with the behaviour of mixtures of sand and saturated kaolin paste considered as composite materials made of permeable and deformable (with non-linear behaviour) matrix (the kaolin paste) with rigid and impervious inclusions (the sand grains). Oedometric and permeability tests conducted on such mixtures highlight the key role of the state of the clay paste, and show the existence of a threshold of sand grain concentration above which a structuring effect influences both modulus and permeability. At the light of these experiments, the usual and tangent homogenization process (with simplifying assumptions to make the problem manageable) has been applied to estimate the mixture permeability and tangent compressibility. Qualitative and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Homogenization; Non-linear behaviour; Sand-clay mixtures; Permeability; Tangent modulus; Compaction; Hardening.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000100017
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Prévention des mortalités estivales de naissain d'huîtres creuses. Expérimentations sur estran (Rivière d'Auray, été 1998). 1 : comparaison de différents lots de naissain. 2 : tentative "d'endurcissement» du naissain". ArchiMer
Mazurie, Joseph; Kuntz, Gregoire; Claude, Serge; Hirata, Toshio.
Cupped oysters, Crassostrea gigas, often suffer abnormal mortalities during summer, at one year of age. Both scientists and professionnals are interested in finding practical methods to reduce these mortalities. The present study tries to answer two questions : 1- are there any differences of summer mortalities among various batches of spat available from spat collection areas (Arcachon and Charentes) ? 2- is it possible to improve summer survivals by wintering the spat at high air exposure locations (« hardening » procedure) ? The first comparison did not reveal any significant difference between the 16 batches of spat tested (mortalities between 5 % and 30 %). The second comparison in the same summer conditions was not able to show to any improvement...
Tipo: Text Palavras-chave: Huître creuse; Mortalité; Estran; Vitalité; Endurcissement; Gigas oyster; Mortality; Intertidal zone; Vitality; Hardening.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00105/21665/19243.pdf
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The kinetic analysis and simulation of hardening in bread made by the yudane dough method OAK
Tsuboi, Kazumasa; Ohara, Ami; Matsushita, Koki; Yamada, Daiju; Santiago, Dennis Marvin; Kawakami, Sakura; Koaze, Hiroshi; Yamauchi, Hiroaki.
Pullman type white breads with or without Yudane dough at 10 and 20% (w/w, flour base) were made by the no first fermentation method. Yudane dough was prepared by mixing boiling water and flour at a 1:1 ratio. The breads were stored at various temperature conditions and then subjected to analyses of bread hardening (temporal changes in hardness), hardening rate constant of bread (HRC), and simulation of hardening behavior using a hardening model. The results were as follows: The hardening of all breads slowed with the increase in storage temperature. The hardening of breads made with Yudane dough (Yudane breads) was slower than that without Yudane dough (Control) at any storage temperature. The HRC of all breads sharply decreased with the increase in...
Palavras-chave: Bread; Temperature; Hardening; Kinetic model; Simulation.
Ano: 2017 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4484
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