Search results for "ABT"
showing 10 items of 190 documents
Sympathetic cooling of protons and antiprotons with a common endcap Penning trap.
2017
We present an experiment to sympathetically cool protons and antiprotons in a Penning trap by resonantly coupling the particles to laser cooled beryllium ions using a common endcap technique. Our analysis shows that preparation of (anti)protons at mK temperatures on timescales of tens of seconds is feasible. Successful implementation of the technique will have immediate and significant impact on high-precision comparisons of the fundamental properties of protons and antiprotons. This in turn will provide some of the most stringent tests of the fundamental symmetries of the Standard Model.
Schlüssel zum systematischen Catalog der Dorpater Universitäts-Bibliothek [Schlüssel zum systematischen Catalog der Dorpater Universitätsbibliothek]
1873
Liellopu nojumes būvniecības projekts Z/S "Augstkalnu mājas"
2022
Maģistra darba mērķis ir veicināt lopkopības attīstību Z/S “Augstkalnu mājas”, nodrošinot lauksaimniecībā turētajiem liellopiem labturīgus dzīves apstākļus un veicinot ekonomisku saimniekošanu. Maģistra darbā tika risināta konkrētā problēma - netiek nodrošināti liellopiem labturīgi apstākļi. Darba rezultātā ir izstrādāts projekts, kas veicina Z/S “Augstkalnu mājas” attīstību un nodrošina zemnieku saimniecībā audzētājiem liellopiem labturīgus apstākļus. Darba apjoms: 70 lapaspuse un 30 pielikumi. Atslēgas vārdi: projekts, projekta vadīšana, liellopu labturība Noslēguma darba bibliogrāfiskais apraksts: Sekace, L., Cekuls, A. (2022). Liellopu nojumes būvniecības projekts Z/S “Augstkalnu mājas”…
Zemesgrāmatu ieraksta publiskās ticamības principa piemērošanas trūkumi Latvijā
2022
Zemesgrāmatu ieraksta publiskās ticamības princips ir nozīmīgs instruments, kas nodrošina paļāvību personām, ka zemesgrāmatās veiktie ieraksti atbilst patiesajam tiesiskajam stāvoklim. Kā viens no šī principa pamatmērķiem ir labticīgā nekustamā īpašuma ieguvēja aizsardzība. Tomēr pašlaik spēkā esošais tiesiskais regulējums Latvijā neparedz šī principa efektīvu funkcionēšanu praksē. Bakalaura darba ietvaros tiek izvērtēti problemātiskie tiesiskie aspekti Latvijā, kas neļauj zemesgrāmatu ieraksta publiskās ticamības principam efektīvi funkcionēt, lai nodrošinātu civiltiesiskās aprites stabilitāti nekustamo īpašumu atsavināšanas darījumu jomā. Darbā arī tiek izvērtēts Vācijas tiesiskais regulē…
Charge radius of the short-lived $^{68}$Ni and correlation with the dipole polarizability
2020
We present the first laser spectroscopic measurement of the neutron-rich nucleus $^{68}$Ni at the \mbox{$N=40$} subshell closure and extract its nuclear charge radius. Since this is the only short-lived isotope for which the dipole polarizability $\alpha_{\rm D}$ has been measured, the combination of these observables provides a benchmark for nuclear structure theory. We compare them to novel coupled-cluster calculations based on different chiral two- and three-nucleon interactions, for which a strong correlation between the charge radius and dipole polarizability is observed, similar to the stable nucleus $^{48}$Ca. Three-particle--three-hole correlations in coupled-cluster theory substant…
Investigating the Antiproliferative and Antioxidant Properties of Pancratium maritimum L. (Amaryllidaceae) Stems, Flowers, Bulbs, and Fruits Extracts
2018
Pancratium maritimumstems, flowers, bulbs, and fruits extracts were investigated for their antiproliferative and antioxidant properties. Total phenols and total flavonoids were also determined. Thein vitroantiproliferative activity was tested against seven cancer cell lines such as C32, HeLa, MDA-MB-231, PC3, A549, MCF-7, and LNCaP by using SRB assay. Interesting results were obtained with stems ethanol extract (ET1) against C32 cells (IC50of 27.1μg/mL) and fruits aqueous extract (AQ) against MCF-7 cell line (IC50of 36.5μg/mL). To define the antioxidant activity, four tests such as DPPH, ABTS FRAP, andβ-carotene bleaching tests were used.The most promising ABTS scavenging capacity was obser…
Physicochemical, Nutraceutical and Sensory Traits of Six Papaya (Carica papaya L.) Cultivars Grown in Greenhouse Conditions in the Mediterranean Clim…
2020
Six papaya (Carica papaya L.) cultivars, grown in a Mediterranean climate under greenhouse conditions, were screened for physicochemical properties, antioxidant capacity, nutritional and sensory characteristics. The fruits, harvested with more than 50% of yellow surface (between 60% and 77%) were tested for carotenoids content, phenolic content, reducing activity (ABTS) and cellular antioxidant activity (CAA50). The physicochemical traits were measured in terms of the titratable acidity and soluble content whereas proximal composition along with moisture, fats, total sugar, ash, vitamin A, C and E content. Moreover, the sensory profile was analyzed by a semi-trained panel. Although the six …
Search for weakly decaying b -flavored pentaquarks
2018
Investigations of the existence of pentaquark states containing a single $b$ (anti)quark decaying weakly into four specific final states J/$\psi K^+\pi^- p$, J/$\psi K^- \pi^- p$, J/$\psi K^- \pi^+ p$, and $J/\psi \phi (1020) p$ are reported. The data sample corresponds to an integrated luminosity of 3.0/fb in 7 and 8 TeV pp collisions acquired with the LHCb detector. Signals are not observed and upper limits are set on the product of the production cross section times branching fraction with respect to that of the $\Lambda_b$.
Free radical scavenging capability, antioxidant activity and chemical constituents of Pyrola incarnata Fisch. leaves
2013
Abstract In the present study, the crude extract and its four fractions of petroleum ether, ethyl acetate, n-butanol, water from Pyrola incarnata Fisch. leaves were prepared and their antioxidant activities were investigated by using four antioxidant assays in vitro. The ethyl acetate fraction showed remarkably strong antioxidant activities on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging, ABTS radical scavenging, reducing power and β-carotene-linoleic acid bleaching, which were almost comparable to capacities of the positive controls (VC and BHT). The ethyl acetate fraction had the highest total phenolic and total flavonoid contents. Furthermore, Pearson correlation analysis was …
Interactions between 2-Aminobenzothiazole and Natural Organic Matter as Evidenced by CPMAS Nitrogen-15 NMR Spectroscopy
2009
Cross-polarization magic angle spinning (CPMAS) 15N nuclear magnetic resonance (NMR) spectroscopy was used to study the interactions between 2-aminobenzothiazole (ABT) and natural organic matter in the presence of the natural enzyme laccase and synthetic air. Through the use of synthesized model compounds, we were able to confirm previous findings by CPMAS 13C NMR spectroscopy that showed the formation of covalent amide bonds. We also provide evidence of the presence of two additional H bonds between ABT and the natural organic matter. Both H bonds involved the amino and thiazole groups of ABT.