195 research outputs found
Synthesis, structural and magnetic properties of TM22+[MOIV(CN)(8)]center dot nH(2)O
Octacyanomolybdates (OCMs) TM2 divided by[Mo(CN)(8)]center dot nHO, where TM is Mn, Fe, Co, Ni, Cu were synthesised and characterised by IR spectroscopy and UV-VIS spectroscopy. The UV-VIS spectrum showed the intervalence charge transfer (IVCT) band between Mo-IV-CN-Cu-II and Mo-V-CN-Cu-I around 510 nm. Studied OCMs adopt tetragonal crystal structure. The H-1 NMR signals reflect the magnetic moment of the TM2- ions (mu(P)). The decay rates of free induction decay (FID) signals
increase as pp and the applied static rf-field increases. The
spin-lattice relaxation times at 27.7 MHz vary from 0.0187 ins (Mn) up to 0.45 ms (Cu). Magnetization measurements indicate long-range magnetic ordering of Mn- and Co- OCMs with the Curie temperature T-c = 4 K. The remaining OCMs (TM is Fe, Ni, Cu) are paramagnetic down to T = 1.9 K
Technológiai Előretekintési Program
Az Országos Mûszaki Fejlesztési Bizottság döntése
alapján 1998-ban átfogó elemzés kezdôdött Technoló-
giai Elôretekintési Program (TEP) néven. A program
célja, hogy a piaci és technológiai lehetôségek feltá-
rásával hozzájáruljon a hosszú távú versenyképesség
növeléséhez és ezen keresztül az életminôség javításá-
hoz. A TEP a gazdasági, társadalmi folyamatok, a tudo-
mány és technika eredményeinek elemzésével megje-
löli azon kulcskérdéseket, döntési pontokat, amelyek
meghatározzák az egyes szakmai területek illetve az
ország jövôjét a következô 15-25 évben. Az Irányító
Testület és a munkacsoportok elemezték a jelenlegi
helyzetet,
eltérô
jövôképeket
vázoltak fel, és a legked-
vezôbbnek ítélt – de a mai feltételek mellett, tudatos,
összehangolt erôfeszítések nélkül nem feltétlenül a leg-
valószínûbb – jövôkép megvalósítását célzó
ajánlásokat
fogalmaztak meg. A legkedvezôbb jövôképbôl leve-
zetett ajánlások tehát mindazoknak szólnak, akik köz-
vetlenül vagy közvetve hatással lehetnek az egyes
szakterületek vagy a magyar társadalom és gazdaság
egészének jövôjére
Development of sperm vitrification protocols for freshwater fish (Eurasian perch, Perca fluviatilis) and marine fish (European eel, Anguilla anguilla)
[EN] Vitrification was successfully applied to the sperm of two fish species, the freshwater Eurasian perch (Perca fluviatilis) and marine European eel (Anguilla anguilla). Sperm was collected, diluted in species specific non-activating media and cryoprotectants and vitrified by plunging directly into liquid nitrogen without pre-cooling in its vapor. Progressive motility of fresh and vitrified-thawed sperm was evaluated with computer-assisted sperm analysis (CASA). Additional sperm quality parameters such as sperm head morphometry parameters (in case of European eel) and fertilizing capacity (in case of Eurasian perch) were carried out to test the effectiveness of vitrification. The vitrification method for Eurasian perch sperm resulting the highest post-thaw motility (14 +/- 1.6%) was as follows: 1:5 dilution ratio, Tanaka extender, 30% cryoprotectant (15% methanol + 15% propylene-glycol), cooling device: Cryotop, 2 mu l droplets, and for European eel sperm: dilution ratio 1:1, with 40% cryoprotectant (20% MeOH and 20% PG), and 10% FBS, cooling device: Cryotop, with 2 mu l of sperm suspension. Viable embryos were produced by fertilization with vitrified Eurasian perch sperm (neurulation: 2.54 +/- 1.67%). According to the ASMA analysis, no significant decrease in head area and perimeter of vitrified European eel spermatozoa were found when compared to fresh spermatozoa.The work was funded by the NKFI (previously OTKA) project number K-109847 and by a Short-term Scientific Mission awarded to E. Kasa by the COST Office (Food and Agriculture COST Action FA1205: Assessing and improving the quality of aquatic animal gametes to enhance aquatic resources. The need to harmonize and standardize evolving methodologies, and improve transfer from academia to industry; AQUAGAMETE). The work was supported by the project Research Center of Excellence - 9878-3/2016/FEKUT of the Ministry of Human Resources of Hungary and the project EUREKA_HU_12-1-2012-0056 (PERCAHATCH).Kása, E.; Bernáth, G.; Kollár, T.; Zarski, D.; Lujic, J.; Marinovic, Z.; Bokor, Z.... (2017). Development of sperm vitrification protocols for freshwater fish (Eurasian perch, Perca fluviatilis) and marine fish (European eel, Anguilla anguilla). General and Comparative Endocrinology. 245:102-107. https://doi.org/10.1016/j.ygcen.2016.05.010S10210724
Parentage testing and looking for single nucleotide markers associated with antler quality in deer (<i>Cervus elaphus</i>)
To provide a cost-efficient parentage testing kit for red deer (Cervus elaphus), a 63 SNP set has been developed from a high-density Illumina
BovineHD BeadChip containing 777 962 SNPs after filtering of genotypes of 50
stags. The successful genotyping rate was 38.6 % on the chip. The ratio
of polymorphic loci among effectively genotyped loci was 6.5 %. The
selected 63 SNPs have been applied to 960 animals to perform parentage
control. Thirty SNPs out of the 63 had worked on the OpenArray platform. Their
combined value of the probability of identity and exclusion probability was
4.9×10-11 and 0.99803, respectively.
A search for loci linked with antler quality was also performed on the
genotypes of the above-mentioned stags. Association studies revealed 14 SNPs
associated with antler quality, where low-quality antlers with short and
thin main beam antlers had values from 1 to 2, while high-quality antlers
with long and strong main beams had values between 4 and 5. The chance for a
stag to be correctly identified as having high-value antlers is expected to
be over 88 %.</p
Photon-Atom Coupling with Parabolic Mirrors
Efficient coupling of light to single atomic systems has gained considerable
attention over the past decades. This development is driven by the continuous
growth of quantum technologies. The efficient coupling of light and matter is
an enabling technology for quantum information processing and quantum
communication. And indeed, in recent years much progress has been made in this
direction. But applications aside, the interaction of photons and atoms is a
fundamental physics problem. There are various possibilities for making this
interaction more efficient, among them the apparently 'natural' attempt of
mode-matching the light field to the free-space emission pattern of the atomic
system of interest. Here we will describe the necessary steps of implementing
this mode-matching with the ultimate aim of reaching unit coupling efficiency.
We describe the use of deep parabolic mirrors as the central optical element of
a free-space coupling scheme, covering the preparation of suitable modes of the
field incident onto these mirrors as well as the location of an atom at the
mirror's focus. Furthermore, we establish a robust method for determining the
efficiency of the photon-atom coupling.Comment: Book chapter in compilation "Engineering the Atom-Photon Interaction"
published by Springer in 2015, edited by A. Predojevic and M. W. Mitchell,
ISBN 9783319192307, http://www.springer.com/gp/book/9783319192307. Only
change to version1: now with hyperlinks to arXiv eprints of other book
chapters mentioned in this on
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