89 research outputs found
The crystal structure of (4SR)-7-(3,4-dichlorobenzyl)-4,8,8-trimethyl-7,8-dihydroimidazo[5,1c][1, 2,4]triazine-3,6(2H,4H)-dione, C15H16Cl2N4O2
No full textTzvetkov NT, Peeva MI, Tsakovska I, Milella L, Pajeva I, Stammler H-G. The crystal structure of (4SR)-7-(3,4-dichlorobenzyl)-4,8,8-trimethyl-7,8-dihydroimidazo[5,1c][1, 2,4]triazine-3,6(2H,4H)-dione, C15H16Cl2N4O2. Zeitschrift für Kristallographie - New Crystal Structures . 2022;237(2).C15H16Cl2N4O2, monoclinic, P2(1)/c (no. 14), a = 26.2014(7) angstrom, b = 7.59320(10) angstrom, c = 17.9766(4) angstrom, beta = 109.217(3)degrees, V = 3377.20(14) angstrom(3), Z = 8, R ( gt )(F) = 0.0503, wR ( ref )(F (2)) = 0.1411, T = 100.0(1) K
Ion beam synthesis of Te and Bi nanoclusters in silicon: The effect of post-implantation high frequency electromagnetic field
No full textThe post-implantation effect of high frequency electromagnetic field (HFEMF) on the microstructure and electrical properties of high dose Te+ and Bi+ implanted (100) Si was investigated by cross-sectional high resolution transmission electron microscopy and fourpoint probe electrical measurements. Te and Bi nanoclusters (NCs) embedded in amorphized Si have been formed by ion implantation. Post-implantation treatment with HFEMF reorganizes the cluster shape and distribution by stimulation of spinodal decomposition and ordering of Te NCs to a percolation system. The effect of HFEMF on Bi NCs is assumed to be connected with the formation of electrical microcurrents causing local heating of their interfaces with the a-Si matrix. The results of electrical measurements show that the HFEMF application reduces the sheet resistance by a factor of about 6 for Te+ and about 3 for Bi+ irradiation
Potential targets for early diagnosis and neuroprotection in asphyxiated newborns
No full textIl capitolo non dispone di abstrac
Assessing emotional processes in dairy sheep of different temperaments: Behavioural, cortisol and immune responses in dairy sheep experiencing positive and negative emotions on farm.
No full textKosta Peev, Rečnik na makedonskite govori vo jugoistočniot egejski del 1, 2 (A-K)
No full textMakedonska dialektologija je s slovarjem makedonskih govorov v jugovzhodnem, egejskem delu Kosta Peeva dala slovanskemu jezikoslovju dragoceno delo, ki si zasluži tudi slovaropiščev pogled
High temperature induced crystallization in tantalum pentoxide layers and its influence on the electrical properties
No full textRF sputtered Ta O films (23–26 nm) on Si, before and after high temperature (873, 1123 K) O annealing have been 2 5 2
investigated with respect to their dielectric and microstructural properties.Both high resolution transmission electron microscopy
(HR-TEM) analysis and electrical measurements indicated the presence of extremely thin SiO at the interface with Si.The 2
substrate temperature during deposition has no effect on the flatness of the SiO –Ta O interface but it affects the flatness of the 2 2 5
Si–SiO interface—for films obtained on heated substrate, this interface becomes abrupt.The as-deposited and the annealed, at 2
873 K, films are amorphous where as after 1123 K annealing, they crystallize in orthorhombic phase, (there is evidence that the
crystal phase electrically manifests as slow states).The crystallization of the films favor a larger dielectric constant at 1 MHz and
a smaller leakage current especially in the dielectric voltage region, which will be the operating voltage for future technology
generations.A leakage current of ;10 Aycm at 1 V can be achieved.The results are discussed in terms of relative impact of y9 2
two concurrent mechanisms during high temperature O treatment—an appearance of crystal phase and a real annealing of the 2
films accompanied with an improvement of the dielectric properties
Increased thermostability of thylakoid membranes in isoprene-emitting leaves probed with three biophysical techniques
No full textThree biophysical approaches were used to get insight into increased thermostability of thylakoid membranes in isoprene-emittingplants.Arabidopsis (Arabidopsis thaliana) plants genetically modified to make isoprene and Platanus orientalis leaves, in which isoprene emission was chemically inhibited, were used. First, in the circular dichroism spectrum the transition temperature of the main band at 694 nm was higher in the presence of isoprene, indicating that the heat stability of chiral macrodomains of chloroplast membranes, and specifically the stability of ordered arrays of light-harvesting complex IIphotosystem II in the stacked region of the thylakoid grana, was improved in the presence of isoprene. Second, the decay of electrochromic absorbance changes resulting from the electric field component of the proton motive force (ΔA 515) was evaluated following single-turnover saturating flashes. The decay of ΔA 515 was faster in the absence of isoprene when leaves of Arabidopsis and Platanus were exposed to high temperature, indicating that isoprene protects the thylakoid membranes against leakiness at elevated temperature. Finally, thermoluminescence measurements revealed that S 2Q B 2 charge recombination was shifted to higher temperature in Arabidopsis and Platanus plants in the presence of isoprene, indicating higher activation energy for S 2Q B 2 redox pair, which enables isoprene-emitting plants to perform efficient primary photochemistry of photosystem II even at higher temperatures. The data provide biophysical evidence that isoprene improves the integrity and functionality of the thylakoid membranes at high temperature. These results contribute to our understanding of isoprene mechanism of action in plant protection against environmental stresses. © 2011 American Society of Plant Biologists. All Rights Reserved
Isoprene emission in the monocot Arundineae tribe in relation to functional and structural organization of the photosynthetic apparatus
No full textSeveral plant species emit isoprene, a compound able to protect plants against high temperatures and oxidative stresses, and to affect the oxidative capacity of the atmosphere. The emission of isoprene in monocots is much less investigated than in dicots. We explored the emission of isoprene among members of the Poaceae tribe Arundineae, and its potential impact on plant performance. Our results confirm, also in monocots, the existence of a significant correlation between photosynthesis and isoprene emission and further suggest that isoprene inversely correlates to habitat xericity in unstressed Arundineae. Isoprene emission capacity developed rapidly in unfolding leaves, implying some developmental differences in the control of this biosynthetic pathway with respect to dicots. Among Arundineae, marked species-specific differences in several parameters related to plant productivity (photosynthesis, carbon lost as isoprene, water use efficiency, biomass and chloroplast ulrastructure) were observed. Isoprene presence improved structural organization of thylakoid membrane system and decreased the heat dissipation at physiological temperature. Our results demonstrate that, as in dicots, also in monocots isoprene could contribute to improve photosynthesis performance, although this was not necessarily reflected in higher yields, at least in unstressed condition
Transcendental extensions of a valuation domain of rank one
No full textLet be a valuation domain of rank one and quotient field . Let be a fixed algebraic closure of the -adic completion of and let be the integral closure of in . We describe a relevant class of valuation domains of the field of rational functions which lie over , which are indexed by the elements , namely, the valuation domains . If is discrete and is a uniformizer, then a valuation domain of is of this form if and only if the residue field degree is finite and , for some , where is the maximal ideal of . In general, for we have if and only if and are conjugated over . Finally, we show that the set of irreducible polynomials over endowed with an ultrametric distance introduced by Krasner is homeomorphic to the space endowed with the Zariski topology
Business Projects and Capital Budgeting
No full textThis thesis describes in depth what the steps for a successful business project are: from an idea to its implementation. Every business project may be regarded as an investment. I followed the institutions involved and then the instruments needed, but the next logical step in order to complete the picture would be the human factor. Because all the knowledge base on how to support the mission (idea and its goal), how to manage the project, and what kind of players to involve in the end is executed by people. Humans are incapable of predicting the future, but are perfect in adapting to new realities. Similarly, no capital budget can be perfectly coinciding with expected performance. No matter how many times the facts are checked the perfect balance is lost with time. My goal with this topic was to show that in order to bring business value and competitive advantage, good knowledge of the processes and methods is paramount. Careful planning and execution can bring in synchrony idea, raising capital, risk management, capital budgeting and execution close enough, so that in the end a business project may be titled successful
- …
