Search results for "ADP"

Kazimira Buiņicka ieguldījums Latgales novadpētniecībā

2020

Pētījums veltīts salīdzinoši nesen aktualizētam jautājumam, kas saistīts ar poļu laicīgo muižnieku – kultūras darbinieku devumu Latgales novadpētniecībā. Bakalaura darbā, kas balstīts historiogrāfijas analīzē, tiek pētīta Latgalē dzimuša 19. gadsimta pirmās puses pētnieka un literāta, poļu muižnieka Kazimira Buiņicka sabiedriskā un literārā darbība, kas veltīta tagadējās Latgales reģiona izpētei. Darba mērķis ir raksturot Kazimira Buiņicka kā Latgales kultūrvēsturē nozīmīgas personības ieguldījumu reģiona novadpētniecības aizsākšanā un veicināšanā. Pētījuma izstrādes laikā tika apkopots un analizēts pieejamais Buiņicka atstātais mantojums - literārās publikācijas, zinātniski pētnieciskas ie…

Membrane transport in the endocytic pathway: Animal versus plant cells

2000

The endocytic pathway is a well established process in animal cells, but it is not well understood in plant cells. At the morphological level, all the compartments involved in endocytosis in animal cells seem to have counterparts in plant cells, and the organization of the pathway appears to share some striking similarities. Several Rab homologues have been found in plant cells, including homologues of Rab5, Rab7, and Rab11, markers of endocytic compartments in animal cells. Coat proteins are also present in plant cells, including clathrin, adaptins, and ADP ribosylation factor proteins. However, endocytic compartments in plant cells also exhibit specific features both in organization and f…

Do cilia drive water through the buccopharyngeal and opercular cavities in the fossorial Otophryne robusta tadpole?

1993

How and Why Some Issues Spread Fast In Social Media

2015

This paper brings together current insights from various disciplines into the spreading of social media post. By a structured literature review of peer-reviewed literature 39 recent articles on diffusion in social media were located. The search spanned 10 years, although all the papers were published after 2009, indicating that the examination and observation of spread patterns in social media is still in an early stage. The analys is focused on spread patterns and factors that may explain how rapidly issues spread in the online environment. Based on the findings, from an organizational perspective a model is constructed and directions for future research are suggested. The model focuses on…

KRAS-mutated intrahepatic cholangiocarcinoma shows preferential sensitivity towards PARP-1-based interventions

2020

Second Language Interference during First Language Processing by Arabic-English Bilinguals.

2017

The research investigated whether a bilinguals’ second language (L2) is activated during a task involving only the first language (L1). We tested the hypothesis that the amount of L2 interference can vary across settings, with less interference occurring in testing locations where L2 is rarely used. In Experiment 1, we compared language processing for 50 Arabic–English bilinguals tested in Saudi Arabia and 49 Arabic–English tested in the United States. In the task, participants viewed a picture and judged whether a phoneme presented over headphones was part of the L1 picture name. The results showed no effect of testing location on processing. For both groups of bilinguals, we observed L2 i…

Theatrical virtual acoustic rendering with head movement interaction

2019

AbstractNowadays, the use of virtual reality/virtual acoustics (VR/VA) in archaeology for rendering lost buildings is an important topic in the cultural heritage field. Moreover, the addition of additional senses apart from the sight increases the feeling of immersion in virtual environments. The aim of this paper is to show the interaction work developed in a VA system, based on Unity and FMOD, the graphical and acoustical reconstruction of an ancient building and the development of a VR goggles with headphones to render 3D audio and video interactively. This system has been implemented to render auralizations in a binaural system and has been applied to the renderization of an old and los…

Synthesis and protonation behaviour of the macrocycle 2,6,10,13,17,21-hexaaza[22]metacyclophane. Thermodynamic and NMR studies on the interaction of …

1996

Abstract The novel cyclophane receptor 2,6,10,13,17,21-hexaaza[22]metacyclophane (L) has been synthesised and characterised. The acid-base behaviour and interaction with ATP, ADP and AMP have been studied by potentiometry in 0.15 mol dm−3 at 298.1 K and multinuclear NMR. L presents in its protonated forms a molecular organization which enables its multipoint binding with nucleotides. Salt-bridge formation occur between the polyammonium sites of L and the phosphate chain of the nucleotides while π-stacking between the meta-phenylene subunit incorporated in the receptor and the adenine ring of the nucleotides.

Structure and function of ferredoxin-NADP+-oxidoreductase

1987

The redox-enzyme ferredoxin-NADP-oxidoreductase has been shown to be activated by light and inactivated in the dark. This review will summarize recent data concerning the biochemical characterization of the enzyme compared to its in-vivo activation. Further-more the mechanism of this activation process is discussed as a conformational change caused by the light-driven proton gradient.

Kinetic and functional characterization of a membrane-bound NAD(P)H dehydrogenase located in the chloroplasts of Pleurochloris meiringensis (Xanthoph…

1996

Using isolated chloroplasts or purified thylakoids from photoautotrophically grown cells of the chromophytic alga Pleurochloris meiringensis (Xanthophyceae) we were able to demonstrate a membrane bound NAD(P)H dehydrogenase activity. NAD(P)H oxidation was detectable with menadione, coenzyme Q0, decylplastoquinone and decylubiquinone as acceptors in an in vitro assay. K m-values for both pyridine nucleotides were in the μmolar range (K m[NADH]=9.8 μM, K m[NADPH]=3.2 μM calculated according to Lineweaver-Burk). NADH oxidation was optimal at pH 9 while pH dependence of NADPH oxidation showed a main peak at 9.8 and a smaller optimum at pH 7.5-8. NADH oxidation could be completely inhibited with…