Search results for "Fragment"
showing 10 items of 1612 documents
Truncated recombinant light harvesting complex II proteins are substrates for a protein kinase associated with photosystem II core complexes
1998
AbstractPrevious studies directed towards understanding phosphorylation of the chlorophyll a/b binding proteins comprising light harvesting complex II (LHC II) have concentrated on a single phosphorylation site located close to the N-terminus of the mature proteins. Here we show that a series of recombinant pea Lhcb1 proteins, each missing an N-terminal segment including this site, are nevertheless phosphorylated by a protein kinase associated with a photosystem II core complex preparation. An Lhcb1 protein missing the first 58 amino acid residues is not, however, phosphorylated. The results demonstrate that the LHC II proteins are phosphorylated at one or more sites, the implications of wh…
Golgi Fragmentation in Neurodegenerative Diseases: Is There a Common Cause?
2019
In most mammalian cells, the Golgi complex forms a continuous ribbon. In neurodegenerative diseases, the Golgi ribbon of a specific group of neurons is typically broken into isolated elements, a very early event which happens before clinical and other pathological symptoms become evident. It is not known whether this phenomenon is caused by mechanisms associated with cell death or if, conversely, it triggers apoptosis. When the phenomenon was studied in diseases such as Parkinson’s and Alzheimer’s or amyotrophic lateral sclerosis, it was attributed to a variety of causes, including the presence of cytoplasmatic protein aggregates, malfunctioning of intracellular traffic and/or alterations i…
Trap-assisted studies of odd, neutron-rich isotopes from Tc to Pd
2012
We review the present and future of trap-assisted structure studies of odd, neutron-rich Tc, Ru, Rh and Pd isotopes at the limits of present experimental techniques. These nuclei of refractory elements are produced in light-particle induced fission and filtered by their mass number with the IGISOL mass separator. Further mass separation with the JYFLTRAP Penning trap system provides a clean, monoisotopic beam perfectly suited for precise nuclear spectroscopy. Connecting the IGISOL and the JYFLTRAP facilities to the recently installed MCC30/15 cyclotron opens new prospects for post-trap spectroscopy of very exotic, neutron-rich nuclei. peerReviewed
Jet shape modification in Pb-Pb collisions at √S[sub]N[sub]N= 2.76 TeV using two-particle correlations
2018
This thesis focuses on two separate topics. The first topic concerns the upgrade of the Time Projection Chamber (TPC) detector of the ALICE experiment. The upgrade will take place during the second Long Shutdown (2019-2020). The part of the upgrade I participated in was the replacement of the detector’s current readout electronics with Gas Electron Multiplier (GEM) foils. This change would allow for the continuous readout of the data, resulting in a hundredfold increase in the amount of data the ALICE experiment can process, as the TPC is the central tracking detector. I was involved in the Quality Assurance (QA) of these GEM foils. The advanced QA procedure consists of three measurements, a…
Uncertainties on the determination of the strong coupling αs from the energy evolution of jet fragmentation functions at low z
2014
The QCD coupling alpha_s is determined at NLO*+NMLLA accuracy from the comparison of experimental jet data to theoretical predictions of the energy-evolution of the parton-to-hadron fragmentation function moments (multiplicity, peak, width, skewness) at low fractional hadron momentum z. From the existing e+e- and e-p jet data, we obtain alpha_s(m_Z^2) = 0.1195 +/- 0.0021 (exp.) {+0.0015}_{-0.0} (scale) at the Z mass. The uncertainties of the extracted alpha_s value are discussed.
Lādiņnesēju kustīguma noteikšana karbozola grupu saturošās organiskās plānās kārtiņās
2018
Lādiņnesēju kustīguma noteikšana ir būtiska vielas pielietojumu novērtēšanā. Organiskām gaismas emitējošām diodēm un organiskām saules šūnām ir nepieciešams sastāvēt no materiāliem ar augstu lādiņnesēju kustīgumu. Darba mērķis ir noteikt molekulārās struktūras ietekmi uz savienojuma lādiņnesēju kustīgumu, savienojumiem ar potenciālo pielietojumu saules elementiem vai gaismas izstarojošām diodēm. Darbā tika testēta maz pielietota lādiņnesēju kustīgumu noteikšanas metode, kā arī nomērīti kustīgumi četriem savienojumiem ar potenciālo pielietojumu saules šūnās un trīs savienojumiem ar potenciālo pielietojumu gaismas emitējošās diodēs. Darbā tika secināts, ka maz pielietotai mērījumu metodei ir …
Hartinga strupastes, Microtus hartingi (Arvicolinae, Sumeriomys apakšģints) komunālās vairošanās ietekme uz mātīšu reproduktīvajām sekmēm
2019
Lai pārbaudītu hipotēzi, ka dažādas sociālās sistēmas un uzvedība ir saistīta ar vidi, ko suga apdzīvo, izmanto salīdzinošo metodi, kas pēta taksonomiski tuvu radnieciskas sugas, kurām atšķiras dzīves vide. Darba mērķis ir apskatīt atšķirības divu Microtus hartingi pasugu vairošanās stratēģijās saistībā ar pasugas veidošanos fragmentētā areālā. Darbā, lai novērtētu tēviņu rūpju intensitāti par saviem mazuļiem un mātīšu reproduktīvās sekmes monogāmās grupās un poligīnās grupās ar svešām vai radnieciskām mātītēm, tika izmantotas divas Microtus hartingi pasugas – Microtus hartingi hartingi un Microtus hartingi lydius. Eksperimenti tika veikti laboratorijas apstākļos. Lai novērtētu vairošanās s…
Human disturbance on Polylepis mountain forests in Peruvian Andes
2014
Vuoristot kattavat 20–25 % maapallon pinta-alasta ja niiden alueella kasvaa noin 28 % maapallon metsistä. Vuoristometsät ovat monella tapaa arvokkaita: ne tarjoavat useita ekosysteemipalveluita ja raaka-aineita sekä sisältävät suuren määrän elinympäristöjä ja eliölajeja. Ne ovat kuitenkin myös erittäin haavoittuvaisia. Resurssien optimoimiseksi tutkijat ovat nimenneet maapallolta hotspot-alueita, joilla esiintyy suuri määrä endeemisiä ja uhanalaisia lajeja. Ihmistoiminta vaikuttaa ekosysteemien luonnolliseen tilaan ollen merkittävä uhka hotspot-alueiden lajeille. Lisäksi ekosysteemin pirstaleisuus, laikun koko ja reunavaikutukset voivat vaikuttaa alueen lajirunsauteen ja sukupuuttovauhtiin.…
3D MODELING OF TWO LOUTERIA FRAGMENTS BY IMAGE-BASED APPROACH
2017
Abstract. The paper presents a digital approach to the reconstruction and analysis of two small-sized fragments of louteria, a kind of large terracotta vase, found during an archaeological survey in the south of Sicily (Italy), in the area of Cignana near the Greek colony of Akragas (nowadays Agrigento). The fragments of louteria have been studied by an image-based approach in order to achieve high accurate and very detailed 3D models. The 3D models have been used to carry out interpretive and geometric analysis from an archaeological point of view. Using different digital tools, it was possible to highlight some fine details of the louteria decorations and to better understand the characte…
Sequestrati dalla vendetta: “rimanere chiusi fuori dall’oggetto”
2013
RiassuntoA partire dal loro lavoro di psicoterapeute e attraverso alcuni frammenti clinici che si riferiscono ad un gruppo di adolescenti svoltosi in un quartiere a rischio di Palermo, le Autrici analizzano la dimensione mafiosa non restringendola al solo comportamento criminale; piuttosto declinandola lungo alcuni significanti: non identità e gruppo mafioso che colonizza e sottomette lo psichismo del singolo; fantasmi familiari potenti e spietati che impediscono il costituirsi di sé originali e autonomi; personalità impastate di indifferenza emotiva e vendicatività. Significanti che rendono conto delle vaste aree di desertificazione e pietrificazione – resistenza al cambiamento – avvertita…