700 research outputs found
The action of O-methil treonine and thiaisoleucine on treonine deaminase purified from Escherichia coli K-12
No full textDialogues on Architecture
No full textDialogues on Architecture is a series of dialogues between researchers and practitioners, who are embracing the intellectual model of high technology and are involved in its advancement and application in architecture. Dialogue #4 focuses on the technology transfer between on-and off-Earth research and its impact on society, and in particular on industry and education. The dialogue takes place between Henriette Bier (HB), Paul Chan (PC), Advenit Makaya (AM), and Angelo Cervone (AC).History, Form & AestheticsDesign & Construction ManagementSpace Systems Egineerin
Extracellular H2O2 induced by oligogalacturonides is not ivolved in the inhibition of the auxin-regulated rolB gene expression in tobacco leaf explants
No full texta-1,4-Linked oligogalacturonides (OGs) inhibit auxin-regulated
transcriptional activation of a rolB-b-glucuronidase (GUS) gene
fusion in tobacco (Nicotiana tabacum) leaf explants (D. Bellincampi,
M. Cardarelli, D. Zaghi, G. Serino, G. Salvi, C. Gatz, F.
Cervone, M.M. Altamura, P. Costantino, G. De Lorenzo [1996]
Plant Cell 8: 477–487). In this paper we show that inhibition by OGs
is very rapid, with a short lag time, and takes place even after rolB
promoter activation has initiated. OGs also induce a transient and
catalase-sensitive accumulation of H2O2 in the leaf explant culture
medium. OGs with a degree of polymerization from 12 to 15 are
required for both the inhibition of the auxin-induced rolB-driven
accumulation of GUS and the induction of H2O2 accumulation.
However, OG concentration for half-maximal induction of H2O2
accumulation is approximately 3-fold higher than that for halfmaximal
inhibition of rolB promoter activity. The inhibition of rolB
promoter activity is not influenced by the addition of catalase or
superoxide dismutase, suggesting that H2O2 and superoxide are not
involved in this effect. A fungal oligo-b-glucan elicitor induces
extracellular H2O2 accumulation at comparable or higher levels
than those observed with OGs, but does not prevent the auxininduced
accumulation of GUS. We conclude that H2O2 produced
upon treatment with OGs is not involved in the inhibition of the
auxin-induced expression of the rolB gene
Dry deposition of particle on urban areas
No full textDry deposition process is recognized as an important pathway among the removal processes of radioactive pollutants in atmosphere. There is not a unique and accepted theoretical description of involved dry deposition phenomena due to the complexity of the fluid-dynamic processes that influence the deposition flux, but also because there is a lack of experimental data covering all scenarios of interest. In this paper, that is the result of a National Research Program a research activity conducted by DEIM Department of the University of Palermo and ENEA and funded by the Italian Minister of Economic Development, a new schema for parameterization of particle dry deposition velocity on urban area is proposed. The work required comparisons with some experimental data reported in literature for different particle deposition scenarios. The results show that the proposed approach can catch some aspects of phenomena involved in dry deposition processes for the examined environmental conditions with good agreement
Nucleotide sequence coding for a leucine-rich repeat receptor-like protein kinase (LRPKm1)
No full textBlind simulations of NACIE-UP experimental tests by STH codes
No full textIn the frame of the SESAME project, a benchmarking activity was proposed to validate the existing system thermal-hydraulics codes for Heavy Liquid Metal reactors. More specifically, blind simulations on three well-defined experiments were carried out on the NACIE-UP facility, using CATHARE by ENEA, ATHLET by GRS, RELAP5-3D by University of Roma and RELAP5/Mod3.3 by University of Pisa. The numerical models were calibrated in terms of system thermal losses and gas enhanced circulation by means of the outcomes from specific experimental preliminary tests. The present discussion expose, compare and analyze the numerical results of some representative parameters (primary lead-bismuth eutectic (LBE) mass flow rate, temperatures and pressure) charaterizing the system behaviour in transiet scenarios in a pre-test blind numerical assessment. Copyright İ 2018 ASM
Preliminary results on the coupling of a three-dimensional lead fast reactor model and a one-dimensional external loop
No full textAn accurate three-dimensional simulation of all the components of the primary circuit of a LFR (Lead Fast Reactor) cannot be performed with the current computational power. One strategy to deal with such complex systems is to adopt a multiscale approach, where different models and geometric representations are introduced for different parts of the reactor. This paper presents a preliminary assessment of a methodology developed in the framework of the FEM-LCORE code to simulate an accident scenario where natural circulation plays a key role in the heat removal
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