Authors:I. Anton, A. Zsolnai, I. Komlósi, A. Király and L. Fésüs
Te Pas, M. F. W., Soumillion, A., Harders, F. L., Verburg, F. J., Van den Bosch, T. J., Galesloot, P. and Meuwissen, T. H. E. (1999): Influences of myogenin genotypes on birth weight, growthrate, carcass weight, backfat thickness, and lean weight of
Authors:T. Tanaka, J. Magoshi, Y. Magoshi, B. Lotz, S.-I. Inoue, M. Kobayashi, H. Tsuda, M. Becker, Zh. Han and Sh. Nakamura
The crystal structure, thermal properties and growth rates of spherulites of the Tussah silk fibroin, produced upon drying
of the silk taken directly from the lumen which is essentially a poly(L-alanine)polypeptide, are investigated. Depending on casting conditions, spherulites with either αhelical chain conformation
or β parallel sheet structure are produced. The growth rates display a strong positive temperature coefficient, with an apparent
transition, which however cannot be related with the formation of two different crystal structures at this stage.
Sarkar, C.K.G., Srivastava, P.S.L., Deshmukh, P.S. 2001. Grain growthrate and heat susceptibility index: Traits for breeding genotypes tolerant to terminal high temperature stress in bread wheat ( Triticum aestivum L.). Indian J. Genet. 61 :209
The concentrations of radium isotopes and the progenies (226Ra; 228Ra and 228Th) in three hokutolite samples from Tamagawa hot-spring were measured. These isotopes were analyzed by a well-type HPGe γ-ray
spectrometer for the 351, 911 and 583 keV γ-ray from 214Pb, 228Ac and 208Tl, respectively, each being in radioactive equilibrium with precursors. Concentration of 226Ra and 228Ra were observed to be in the range of 52–85 and 7.1–85 Bq/g, respectively. The activity ratios of 228Ra/226Ra and 228Th/226Ra provided the estimation of the growth rate (0.09–0.15 mm/y). Estimated 228Ra/226Ra activity ratios in hot-spring water from surface of three hokutolite were concordant.
In this paper, growth models are classified and characterised using two types of growth rates: from time t to t+1 and from time t to 2t. They are interesting in themselves but can also be used for a quick prediction of the type of growth model that is valid in a particular case. These ideas are applied on 20 data sets collected byWolfram, Chu andLu. We determine (using the above classification as well as via nonlinear regression techniques) that the power model (with exponent>1) is the best growth model for Sci-Tech online databases, but that Gompertz-S-shaped distribution is the best for social sciences and humanities online databases.
, J.M. , Källqvist , T. , Wenner , D. & Gislerod , H.R. ( 2005 ): Combined influence of light and temperature on growthrates of Nannochloropsis oceanica : Linking cellular responses to large-scale biomass production . J
Authors:Nehla Labidi, Manel Ammari, Sana Snoussi, Najoua Messelini, Fatma Gharbi and C. Abdelly
The halophyte Crithmum maritimum thrives in cracks of calcareous rocks or cliffs at seashores, a situation which associates limited phosphorus availability and high salinity. In order to understand the common patterns of colonization and zonation of this species, seedlings were cultivated for 34 d in inert sandy soil irrigated with a nutrient solution containing or not phosphorus at moderate (50 mM) or high (250 mM) NaCl level. Net assimilation rate and consequently relative growth rate increased in response to P deprivation at moderate saline level, but not at high salinity level. Parallelly, CO2 fixation rate, rubisco capacity, transpiration rate and stomatal conductance were diminished by P deprivation at moderate NaCl level. Intercellular CO2 concentration was therefore not affected. Chlororophyll fluorescence analysis revealed that photosynthetic systems were insensitive to change in P availability at moderate salinity level: neither pigment content, nor effective and maximum quantum yield, photochemical and non photochemical quenching, and electron transport rate were affected by P deprivation. On the contrary, at high salinity level when net photosynthesis, rubisco capacity and the quantum yields of PS2 were severely affected, P deprivation strongly augmented electron transport rate. Stomatal aperture and more modest increase in net photosynthesis, rubisco capacity, photosystem II effective quantum yield and photochemical quenching accompanied this response. This study shows the tolerance of C. maritimum to the phosphorus deprivation combined to moderate or to high saline level which may explain the common patterns of colonization and zonation of this species.
Since 1992 outbreaks of Sphaeropsis sapinea have been reported in pine plantations in several localities. Differences in the presence of the fungus and its injurious impact on pine trees in Croatia have been recorded. In some localities, S. sapinea was found on needles in the litter, or on fallen branches and cones, while in other localities the dieback of shoots, branches and crown were associated with the presence of the fungus. In order to reveal the possible reason(s) for these differences in the occurrence of S. sapinea, 17 isolates were collected from all over the country and compared in several aspects. Isolates from the Netherlands were used as references. The study revealed no differences in the morphological characteristics of the cultures or in sporulation. Significant differences in the growth rate of the isolates were found, but these could not be correlated with the symptoms observed in the field. The hypothesis that the presence of different strains of S. sapinea causes outbreaks of fungus on pines in Croatia was rejected. Other possible reasons for fungus outbreaks in several localities are discussed.